JP2018024189A - Reticulated resin molded product and method of using the reticulated resin molded product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mesh-like resin molded product which has flexibility at the time of mounting and is fixed at the position after the mounting position is determined, and a method of using the same. SOLUTION: A plurality of first resin linear portions 11 extending in parallel with each other and a plurality of second resin linear portions extending in parallel with each other and in a direction intersecting each first resin linear portion 11. In the joint portion 13 having the portion 12 and the first resin linear portion 11 and the second resin linear portion 12 are located at the intersection 14 with each other, the first resin linear portion 11 and the second resin linear portion 11 and the second resin linear portion 12 are provided. Assuming that the direction P passing through both axial centers 11a and 12a of the resin linear portion 12 and orthogonal to both axial centers 11a and 12a is the orthographic projection direction P, the first resin linear portion is in the orthographic projection direction P. When looking at the 11 and the second resin linear portion 12, the first resin linear portion 11 is larger than the first area, which is the area where the first resin linear portion 11 and the second resin linear portion 12 overlap. A mesh-like resin molded product 10 having a small second area, which is the area of the joint portion 13 between the resin and the second resin linear portion 12. [Selection diagram] Fig. 1

Description

  The present invention relates to a reticulated resin molded product and a method for using the reticulated resin molded product.

  A mesh-shaped resin molded product such as a mesh-shaped resin tube and a manufacturing method thereof are described in, for example, Patent Documents 1 to 3. Moreover, as a member used in order to coat | cover wiring members, such as an electric wire, a cable, or a wire harness, it describes in patent document 4, for example.

  Among these, Patent Document 1 describes a mesh-like resin tube having a structure excellent in flexibility. Patent Document 4 describes a protective cover for electrical wiring that includes a bendable bellows portion and a straight pipe portion.

JP 2002-181258 A JP 2002-154147 A Japanese Patent Laid-Open No. 9-286052 JP 2012-186978 A

  According to the knowledge of the present inventors, the conventional reticulated resin molded product including the reticulated resin molded product described in Patent Document 1 has not been sufficiently stretchable and curved. That is, the mesh-like resin tube described in Patent Document 1 may have a certain degree of flexibility, but is not sufficiently stretchable in the axial direction. Moreover, the conventional protective cover for wiring members as disclosed in Patent Document 4 has room for improvement in terms of the degree of freedom in design when routing and attaching electrical wiring.

  In addition, the mesh-like resin tube has a degree of freedom when attached to piping members such as water pipes and hydraulic pipes, and wiring members such as electric wires, cables or wire harnesses, but is attached to places where it is exposed to external forces such as vibration. In the case where it is installed, the mesh-like resin tube moves from the mounting location, and there is a problem that the location to be protected cannot be protected. For these reasons, there has been a demand from the market for a mesh-like resin tube that has flexibility at the time of mounting and is fixed to the position after the mounting position is determined.

According to the present invention, a plurality of first resin linear portions extending in parallel to each other, and a plurality of second resin linear shapes extending in parallel to each other and intersecting each first resin linear portion. A mesh-like resin having stretchability and bendability in which each first resin linear portion and each second resin linear portion are joined to each other at a joint located at the intersection of each other A molded article,
At the intersection of the first resin linear part and the second resin linear part joined together, both pass through the axes of both the first resin linear part and the second resin linear part and both Assuming that the direction orthogonal to the axial center is the orthographic projection direction, when the first resin linear portion and the second resin linear portion are viewed in the orthographic projection direction, the first resin linear shape The second area, which is the area of the joint between the first resin linear portion and the second resin linear portion, is smaller than the first area, which is the overlapping area between the first resin linear portion and the second resin linear portion. ,
Further, it is possible to provide a reticulated resin molded product characterized in that when heated to the melting point or higher of the resin molded product, the stretchability and curvature of the heated portion are lost.

Further, according to the present invention, a plurality of first resin linear portions extending in parallel to each other and a plurality of second resins extending in parallel to each other and intersecting each first resin linear portion. A mesh part having a stretchability and a bendability in which each first resin linear part and each second resin linear part are joined to each other at a joint located at an intersection of each other. A molded resin molded product,
The first resin linear portion and the second resin linear portion joined to each other constitute an X link mechanism that can swing with each other as a fulcrum,
Further, it is possible to provide a reticulated resin molded product characterized in that when heated to the melting point or higher of the resin molded product, the stretchability and curvature of the heated portion are lost.

Moreover, according to the present invention, a method of using a cylindrical mesh-shaped resin molded product that can be protected by enclosing a linear member in a freely bendable state,
Preparing a reticulated resin molded product according to any one of claims 1 to 11,
Inserting the linear member from the axial direction of the mesh-shaped resin molded product in a state where the mesh-shaped resin molded product is compressed in the axial direction;
After the inserting step, the step of stretching the mesh-shaped resin molded product in the axial direction;
A step of heating a part or all of the reticulated resin molded product to a temperature equal to or higher than the melting point of the reticulated resin molded product to lose the stretchability and curvature of the heated portion,
It is possible to provide a method for using a reticulated resin molded article including

  According to the present invention, piping members such as water pipes and hydraulic pipes, wiring members such as electric wires, cables, and wire harnesses can be easily handled without sacrificing rigidity, and the design freedom is excellent and the fixing is desired. It is possible to provide a reticulated resin molded product that can be easily fixed by eliminating the stretchability and curvature of only the portion and a method for using the same.

It is a figure which shows the mesh shaped resin molded product which concerns on 1st Embodiment, Among these, (a) is a front view, (b) is the cut end view along the AA line of (a), (c) is It is a top view of the vicinity of the cross | intersection part of a 1st resin linear part and a 2nd resin linear part. It is a perspective view which shows the vicinity of the cross | intersection part of the 1st resin linear part and 2nd resin linear part of the mesh-shaped resin molded product which concerns on 1st Embodiment. It is a top view for demonstrating the operation | movement of the mesh of the mesh-shaped resin molded product which concerns on 1st Embodiment, (a) shows the normal state in which the external force is not provided to the mesh-shaped resin molded product, b) shows a state where the reticulated resin molded product is stretched, and (c) shows a state where the reticulated resin molded product is compressed. It is a front view for demonstrating operation | movement of the mesh-shaped resin molded product which concerns on 1st Embodiment, (a) shows the normal state in which the external force is not provided to the mesh-shaped resin molded product, (b) Indicates a state where the mesh-shaped resin molded product is stretched, and (c) indicates a state where the mesh-shaped resin molded product is compressed. It is a front view for demonstrating operation | movement of the mesh-shaped resin molded product which concerns on 1st Embodiment, Among these, (a) shows the state which the mesh-shaped resin molded product bent, (b) is mesh-shaped resin molding. The state which put the linear member inside the goods and stretched the net-like resin molded product is shown. It is a front view for demonstrating the usage method of the mesh-shaped resin molded product which concerns on 1st Embodiment. It is front sectional drawing which shows the example of the manufacturing apparatus used for the manufacturing method of the mesh-shaped resin molded product which concerns on 1st Embodiment. It is a figure which shows the structure of the dice | dies of the manufacturing apparatus used for the manufacturing method of the mesh-shaped resin molded product which concerns on 1st Embodiment, Among these, (a) is a plane sectional view, (b) and (c) are partial expansions. FIG. Of the steps of the method for manufacturing a mesh-shaped resin molded product according to the first embodiment, an example of a step of improving the mobility of the joint portion between the plurality of first resin linear portions and the plurality of second resin linear portions. It is a figure for demonstrating. Of the steps of the method for manufacturing a mesh-shaped resin molded product according to the first embodiment, other than the step of improving the mobility of the joint portion between the plurality of first resin linear portions and the plurality of second resin linear portions. It is a figure for demonstrating an example. It is a top view of the mesh-shaped resin molded product which concerns on 2nd Embodiment, Among these, (a) shows the normal state in which the external force is not provided to the mesh-shaped resin molded product, (b) is a mesh-shaped resin molded product. Shows a state stretched in the first direction, and (c) shows a state in which the reticulated resin molded product is stretched in a second direction orthogonal to the first direction. It is a figure which shows the vicinity of the junction part of the mesh-shaped resin molded product which concerns on Example 1, (a) shows the state before performing the process of improving the mobility of a junction part, (b) and (c ) Shows the state after the process. It is a figure for demonstrating operation | movement of the mesh-shaped resin molded product which concerns on Example 1, Among these, (a) shows the normal state in which the external force is not provided to the mesh-shaped resin molded product, (b) is mesh-shaped. The state in which the resin molded product is stretched in the axial direction is shown, and (c) shows the state in which the mesh-shaped resin molded product is compressed in the axial direction. It is a figure for demonstrating operation | movement of the mesh-shaped resin molded product which concerns on Example 2, (a) shows the normal state in which the external force is not provided to the mesh-shaped resin molded product, (b) is mesh-shaped. The state in which the resin molded product is stretched in the axial direction is shown, and (c) shows the state in which the mesh-shaped resin molded product is compressed in the axial direction. It is a figure which shows the measurement result of the expansion-contraction rate of the mesh-shaped resin molded product which concerns on Example 1 and Example 2. FIG. It is a figure for demonstrating operation | movement of the mesh-shaped resin molded product which concerns on a comparison form, among these, (a) shows the normal state in which the external force is not provided to the mesh-shaped resin molded product, (b) is mesh-shaped resin. The state in which the molded product is stretched in the axial direction is shown. The state at the time of extinguishing the stretchability and curvature which can be managed by heating the mesh-shaped resin molded product which concerns on Example 1 to the melting | fusing point or more of the said mesh-shaped resin molded product is shown. The state at the time of extinguishing the stretchability and curvature which can be managed by heating the mesh-shaped resin molded product which concerns on Example 1 to the melting | fusing point or more of the said mesh-shaped resin molded product is shown. The state when the mesh-like resin molded product according to Example 2 is heated to a temperature equal to or higher than the melting point of the mesh-like resin molded product and the freely stretchable and curved properties are extinguished is shown.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same components are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

[First Embodiment]
FIG. 1 is a diagram showing a reticulated resin molded product 10 according to the first embodiment, in which (a) is a front view, (b) is a cut end view taken along line AA of (a), (C) is a top view of the vicinity of the crossing part 14 of the 1st resin linear part 11 and the 2nd resin linear part 12. FIG.
FIG. 2 is a perspective view showing the vicinity of the intersection 14 between the first resin linear portion 11 and the second resin linear portion 12 of the mesh-shaped resin molded product 10 according to the first embodiment.
FIG. 3 is a plan view for explaining the operation of the mesh 15 of the mesh-shaped resin molded product 10 according to the first embodiment, in which (a) shows that no external force is applied to the mesh-shaped resin molded product 10. A normal state is shown, (b) shows a state in which the reticulated resin molded product 10 is stretched, and (c) shows a state in which the reticulated resin molded product 10 is compressed.
Each of FIGS. 4 and 5 is a front view for explaining the operation of the mesh-shaped resin molded product 10 according to the first embodiment. 4A shows a normal state where no external force is applied to the mesh-shaped resin molded product 10. FIG. 4B shows a state in which the reticulated resin molded product 10 is stretched. FIG. 4C shows a state where the mesh-shaped resin molded product 10 is compressed. FIG. 5A shows a state in which the mesh-shaped resin molded product 10 is bent. FIG. 5B shows a state in which the linear member 16 is placed inside the mesh-shaped resin molded product 10 and the mesh-shaped resin molded product is stretched.

  The mesh-shaped resin molded product 10 according to the present embodiment is a cylindrical cover member that can be protected by enclosing the linear member 16 in a bendable state. Specific examples of the linear member 16 include piping members such as water pipes and hydraulic pipes, and wiring members such as electric wires, cables, and wire harnesses. Moreover, when the linear member 16 accommodated in the mesh-shaped resin molded product 10 according to the present embodiment is viewed in cross section in the radial direction, the diameter of the linear member 16 is not loaded. It is preferable that the diameter is smaller than the diameter of the mesh-shaped resin molded product 10 when the cylindrical mesh-shaped resin molded product 10 in the normal state is viewed in cross section in the radial direction.

  As a conventional cover member that accommodates a piping member such as a water pipe or a hydraulic pipe, or a wiring member such as an electric wire, a cable or a wire harness, the bendable bellows part and the straight pipe part described in the background section above are provided. For example, a corrugated tube or a spiral tube that has been cut to make it easier to insert the wiring member is used. According to the knowledge obtained by the present inventors, all of these conventional cover members have room for improvement in terms of the degree of design freedom when routing and attaching the piping members and wiring members. It was a thing. Further, the conventional cover member has a risk that the part to be protected is exposed because the cover member moves from a predetermined position by vibration after installation.

  On the other hand, the mesh-shaped resin molded product 10 according to the present embodiment can be protected by enclosing the linear member 16 in a bendable state as described above. Therefore, according to the mesh-shaped resin molded product 10 according to the present embodiment, it is possible to freely handle the linear member 16 even in a state of a structure including the linear member 16. is there. Specifically, the mesh-shaped resin molded product 10 according to the present embodiment is a cross-sectional view in the radial direction of a predetermined portion in the axial direction of a structure in which the linear member 16 is included in the mesh-shaped resin molded product 10. A non-contact space in which the linear member 16 and the mesh resin molded product 10 are not in close contact is formed between the linear member 16 and the mesh resin molded product 10. In other words, when the linear member 16 is included in the mesh-shaped resin molded product 10 according to the present embodiment, it is possible to form a state where the mesh-shaped resin molded product 10 and the linear member 16 are separated from each other. . Therefore, the mesh-shaped resin molded product 10 according to the present embodiment can be used by being freely curved similarly to the linear member 16 even in the state of the structure. That is, according to the mesh-shaped resin molded product 10 according to the present embodiment, when the linear member 16 is included in the mesh-shaped resin molded product 10, the linear member is formed inside the mesh-shaped resin molded product 10. 16 can be moved freely. As described above, the mesh-shaped resin molded product 10 according to the present embodiment can freely handle the linear member 16 even when the mesh-shaped resin molded product 10 includes and protects the linear member 16. Therefore, it can be said that it is an excellent member in terms of design freedom.

  Moreover, the mesh-shaped resin molded product 10 according to the present embodiment includes a plurality of first resin linear portions 11 that extend in parallel to each other, and a direction that intersects the first resin linear portions 11 in parallel with each other. And a plurality of second resin linear portions 12 extending in the direction. Each of the first resin linear portions 11 and each of the second resin linear portions 12 is a mesh-like member that is bonded to each other at the bonding portion 13 that is located at the intersection 14 of each other. Therefore, the mesh-shaped resin molded product 10 according to the present embodiment has a structure that can freely expand and contract in both the axial direction and the radial direction, depending on how the external stress is applied when the linear member 16 is accommodated. Can be realized. Therefore, according to the mesh-shaped resin molded product 10 according to the present embodiment, compared to the conventional cover member, the degree of freedom in design is excellent in both cases of wiring routing and wiring mounting. can do.

  The cross-sectional shape of the first resin linear portion 11 (the cross-sectional shape orthogonal to the axis 11a of the first resin linear portion 11) is not particularly limited, but is, for example, an oval such as a circle, an ellipse, or an oval. The shape is preferred. The cross-sectional shape of the second resin linear portion 12 is the same.

  As shown in FIGS. 1A and 1B, in this embodiment, the reticulated resin molded product 10 is used in a tubular (tubular) form, that is, a reticulated resin tube. The following description will be given.

In the mesh-like resin tube, each of the plurality of first resin linear parts 11 is wound in a coaxial spiral shape. In addition, each of the plurality of second resin linear portions 12 is coaxial with each other and spirals in the opposite direction to the plurality of first resin linear portions 11, and on the outer peripheral side of the plurality of first resin linear portions 11. It is wound.
And in the junction part 13 (refer FIG.1 (b), (c), FIG. 2) located in the crossing part 14 of each 1st resin linear part 11 and each 2nd resin linear part 12, each 1st The resin linear part 11 and each 2nd resin linear part 12 are mutually joined.

  The cross-sectional shape of the reticulated resin tube, that is, the opening shape when the reticulated resin tube is viewed in the axial direction, is an oval shape such as a circle, an ellipse, or an oval.

Here, in the intersection part 14 of the 1st resin linear part 11 and the 2nd resin linear part 12 which were mutually joined, the axis | shaft of both the said 1st resin linear part 11 and the said 2nd resin linear part 12 A direction that passes through the centers 11a and 12a (FIGS. 1C and 2) and is orthogonal to both the axes 11a and 12A is an orthogonal projection direction P (FIGS. 1B and 2). That is, the orthogonal projection direction P is a direction orthogonal to the paper surface of FIG.
When the mesh-shaped resin molded product 10 according to the present embodiment is viewed in the orthographic projection direction P, the first resin linear portion 11 and the second resin linear portion 12 are viewed. 11 is a second area that is an area of the joint portion 13 between the first resin linear portion 11 and the second resin linear portion, rather than a first area that is an overlapping area between the first resin linear portion 11 and the second resin linear portion 12. The area is small (see FIG. 1C).

Thereby, the mobility of the joining part 13 is obtained, and the first resin linear part 11 and the second resin linear part 12 can relatively change the angle with the joining part 13 as a fulcrum. Therefore, the mesh-shaped resin molded product 10 can be easily expanded and contracted. Therefore, according to the mesh-shaped resin molded product 10, when a pipe member such as a water pipe or a hydraulic pipe, or a wiring member such as an electric wire, a cable, or a wire harness is included in the mesh-shaped resin molded product 10, Accordingly, it is possible to respond by expanding and contracting the shape of the mesh-shaped resin molded product 10. Specifically, the mesh-shaped resin molded product 10 is used by expanding the diameter so that the inner periphery of the mesh-shaped resin molded product 10 does not fit to the encapsulated wiring member 16 (so as to be in a non-contact state). It is also possible to reduce the diameter so that the inner periphery of the mesh-shaped resin molded product 10 fits (adheres) to the wiring member 16. However, even when the wiring member 16 is included in the inner periphery of the mesh-shaped resin molded product 10 so as to be in a non-contact state, or when the wiring member 16 is included so as to be in a close-contact state, the wiring member 16 is Since the resin molded product 10 employs a configuration that allows local expansion and contraction freely in both the axial direction and the radial direction, the resin molded product 10 can be freely curved. In this way, even when the wiring member is accommodated in a limited space, it is possible to increase the flexibility of wiring, and as a result, the degree of freedom in designing the wiring can be increased. It is possible to improve. Moreover, according to the mesh-shaped resin molded product 10 according to the present embodiment, the heat transmitted from the wiring member included in the mesh-shaped resin molded product 10 at the time of use can be efficiently dispersed by using the above-described joint structure. Is also possible.
The mesh-shaped resin molded product 10 is a mesh-shaped cover member having a structure that can be locally expanded and contracted in both the axial direction and the radial direction. Even in the case where the wiring members 16 to be used must be bundled locally and used, it is also possible to freely extend and contract them. Note that the mesh-shaped resin molded product 10 may not have sufficient stretchability in the stage immediately after molding (primary processed product), and in that case, a secondary that improves the mobility of the joint portion 13. By performing the processing, a reticulated resin molded article 10 having good stretchability is obtained. The mesh-shaped resin molded product 10 is configured such that the bonding state between each first resin linear portion 11 and each second resin linear portion 12 is the specific bonding structure described above, and the first resin The area of the overlap between the linear portion 11 and the second resin linear portion 12 is a configuration that satisfies the specific condition described above. Therefore, according to the mesh-shaped resin molded product 10, the wiring member can be included and protected so that the outer surface of the wiring member and the mesh-shaped resin molded product 10 are in contact with each other without a gap. Accordingly, it is possible to prevent the occurrence of inconveniences such as the net-like resin molded product 10 being displaced during use and the wiring member being partially exposed.

  Here, when an external force for expanding and contracting the mesh-shaped resin molded product 10 is applied to the mesh-shaped resin molded product 10, the first resin linear portion 11 and the second resin linear portion 12 are mainly bent and deformed (first The first resin linear portion 11 and the second resin linear portion 12 are not so deformed that the axial direction of the resin linear portion 11 and the second resin linear portion 12 is bent, but the torsional deformation of the joint portion 13 occurs. It preferably has a certain degree of bending rigidity. The bending rigidity of the first resin linear part 11 and the second resin linear part 12 sets the thickness (outer diameter), material, molding conditions, etc. of the first resin linear part 11 and the second resin linear part 12. Can be adjusted. By carrying out like this, the said cover member can be bent and used, maintaining the pipe strength excellent in the degree which can prevent the damage of the inclusion member requested | required of the cover member for protecting a wiring member. A mesh-like resin molded product 10 having a certain degree of bending rigidity can be realized. Therefore, the mesh-shaped resin molded product 10 can be used also as a flexible protective material or a binding material.

The second area is preferably 3/4 or less of the first area, and more preferably 2/3 or less of the first area. By doing in this way, sufficient mobility of junction part 13 is realizable.
On the other hand, the second area is preferably 1/20 or more of the first area, and more preferably 1/10 or more. By doing in this way, sufficient joint strength of junction part 13 can be maintained.

As shown in FIG. 3, the first resin linear part 11 and the second resin linear part 12 joined to each other are mutually connected with the joint part 13 as a fulcrum (fulcrum X1, X2, etc. shown in FIG. 3). The X-link mechanism that can swing is configured.
The swing axis of the X link mechanism extends, for example, in the orthogonal projection direction P described above. The orthographic projection direction P is a direction orthogonal to the paper surface of FIG.

Thus, since the 1st resin linear part 11 and the 2nd resin linear part 12 which were mutually joined comprise the X link mechanism, the mesh-shaped resin molded product 10 can be expanded-contracted in the axial direction. It has become. Further, the reticulated resin molded product 10 can be bent. Furthermore, the mesh-shaped resin molded product 10 according to the present embodiment is partially stretchable by applying stress to the location where the first resin linear portion 11 and the second resin linear portion 12 intersect. It is also possible to grant. That is, according to the mesh-shaped resin molded product 10 according to the present embodiment, the R portion (curved portion) can be intentionally formed.
When the mesh-shaped resin molded product 10 expands and contracts or bends in the axial direction, the first resin linear portion 11 and the second resin linear portion 12 that are bonded to each other are bonded to each other. Using the portion 13 as a fulcrum (fulcrum X1, X2, etc. shown in FIG. 3), the angle changes (oscillates) with each other.

As shown in FIG. 3, a pair of first resin linear portions 11 adjacent to each other and a pair of second resin linear portions 12 adjacent to each other serve as a fulcrum (the fulcrum shown in FIG. 3). X1, X2, etc.), the mesh 15 formed by the pair of first resin linear portions 11 adjacent to each other and the pair of second resin linear portions 12 adjacent to each other is parallelogram-shaped. (For example, a rhombus shape).
Accordingly, the length from the fulcrum X1 to the fulcrum X2 shown in FIG. 3 is maintained substantially constant between the states of FIGS. 3 (a), (b), and (c). That is, the lengths L1 (FIG. 3A), L2 (FIG. 3B), and L3 (FIG. 3C) are equal to each other.

Here, the shape of the parallelogram includes not only an accurate parallelogram but also a shape that can be regarded as a substantially parallelogram. For example, the case where each side is not linear but slightly bent is included.
When the mesh-shaped resin molded product 10 is a mesh-shaped resin tube as in the present embodiment, the mesh 15 is formed in a curved shape instead of a planar shape. In this case, the mesh 15 having a parallelogram shape means that the shape of the mesh 15 when the mesh 15 is viewed in a direction passing through the center of the mesh 15 in a direction orthogonal to the axis of the mesh resin tube. Means a parallelogram shape.

As shown in FIG. 4B, when the mesh-shaped resin tube is stretched in the axial direction, the mesh-shaped resin tube is reduced in diameter. That is, in the state of FIG. 4B, the diameter of the mesh-like resin tube is smaller than that in the normal state shown in FIG.
On the other hand, as shown in FIG. 4C, when the mesh-shaped resin tube is compressed (compressed) in the axial direction, the mesh-shaped resin tube expands in diameter. That is, in the state of FIG. 4C, the diameter of the mesh-like resin tube is larger than that in the normal state shown in FIG.
Although depending on the movability of the joining portion 13, for example, as shown in FIG. 4B, the second resin wires adjacent to each other until the second resin linear portions 12 adjacent to each other are in contact with each other. The mesh-like resin tube can be stretched in the axial direction until the shaped portion 12 contacts in the radial direction. Similarly, for example, the net-like resin tube can be stretched in the axial direction until the first resin linear portions 11 adjacent to each other contact each other, that is, until the first resin linear portions 11 adjacent to each other contact in the axial direction. It is possible.
Similarly, depending on the mobility of the joining portion 13, for example, as shown in FIG. 4C, the mesh-like resin tube is compressed in the axial direction until the second resin linear portions 12 adjacent to each other contact each other. It is possible to do. Similarly, for example, the mesh-like resin tube can be compressed in the axial direction until the first resin linear portions 11 adjacent to each other come into contact with each other.

  As shown to Fig.5 (a), the mesh-shaped resin tube can be bent smoothly in the direction where the axial direction bends.

Further, the mesh-like resin tube can be locally expanded and contracted in the axial direction. For this reason, for example, after inserting the wiring member 16 into the mesh-shaped resin tube in a state where the mesh-shaped resin tube is expanded, by stretching both ends of the mesh-shaped resin tube to stretch the mesh-shaped resin tube, As shown in FIG. 5B, the diameter of the mesh-shaped resin tube can be reduced so that the inner periphery of the mesh-shaped resin tube fits (adheres to) the wiring member 16. Thereby, the wiring member 16 can be favorably held by the mesh-like resin tube.
However, the mesh-shaped resin molded product 10 may be used with an expanded diameter so that the inner periphery of the mesh-shaped resin molded product 10 does not fit to the wiring member 16 (so as to be in a non-contact state). It is also possible to reduce the diameter so that the inner periphery of the mesh-shaped resin molded product 10 fits (adheres) to the member 16.

The material constituting the reticulated resin molded product 10 preferably includes a thermoplastic resin. Specific examples of such thermoplastic resins include polyethylene, polypropylene, polystyrene, nylon, polyethylene terephthalate, polybutylene terephthalate, ethylene / vinyl acetate copolymer resin, and polyether / ether / ketone resin. These may be used individually by 1 type, and 2 or more types may be mixed and used for them. Of these, olefin-based resin materials are preferable.
Further, from the viewpoint of expressing good stretchability and flexibility in a well-balanced manner, the polyethylene is preferably high-density polyethylene (HDPE), and the polypropylene is preferably block polypropylene.
By configuring the reticulated resin molded product 10 with an olefin-based resin material, it is possible to easily realize good stretchability and flexibility of the reticulated resin molded product 10.

It is preferable that the mesh-shaped resin molded product 10 is comprised with the resin material containing a pigment from a viewpoint of making the elasticity and bending property favorable. Further, by forming the mesh-shaped resin molded article 10 with a resin material containing a pigment, the bonding state between the first resin linear portion 11 and the second resin linear portion 12 at the intersection (joining portion 13) can be changed. Can be relaxed. Therefore, as a result, the degree of freedom is improved in terms of angular change (swing) of the first resin linear portion 11 and the second resin linear portion 12 with the intersection (joining portion 13) as the center (fulcrum). Can be made.
Even if the pigment is an organic pigment such as an azo pigment or a polycyclic pigment, titanium oxide, barium sulfate, ultramarine, chrome yellow, titanium yellow, cadmium yellow, chromium oxide, cobalt aluminate, petal It may be an inorganic pigment such as (iron oxide red), red lead, lithopone, aluminum, or a ceramic pigment, or an extender pigment such as talc. And the said pigment may be used individually by 1 type, and may be used in combination of 2 or more type. Among these, from the viewpoint of realizing a mesh-shaped resin molded product 10 having an excellent balance between stretchability and flexibility, the mesh-shaped resin molded product 10 is preferably made of a resin material containing carbon black. By doing so, the mesh-like resin molded product 10 can be given rigidity so that the yarn does not loosen. As a result, when the mesh-shaped resin molded product 10 is used while being compressed in the axial direction, it bends in a region other than the intersecting portion 14 formed by each first resin linear portion 11 and each second resin linear portion 12. This can be suppressed. Specific examples of the carbon black include furnace black and acetylene black.
Further, the content of the pigment is preferably 0.5% by mass or more and 10% by mass or less with respect to the total amount of the resin material constituting the reticulated resin molded product 10.

  Furthermore, the stretchable and bendable properties of the mesh-shaped resin molded product 10 can be extinguished when the mesh-shaped resin molded product 10 is heated to the melting point or higher of the mesh-shaped resin molded product. That is, by heating the mesh-shaped resin molded product 10 that can be stretched and bent at the time of installation to the melting point or higher of the mesh-shaped resin molded product when the installation position is determined, the stretchability and the bendability are eliminated and locked. be able to. The part where the stretchability and the bendability disappear can be the whole or a part of the mesh-shaped resin molded product.

  That is, at the intersection 14 of the first resin linear portion 11 and the second resin linear portion 12 joined to each other in FIG. 1C, the mesh-shaped resin molded product has a melting point higher than that of the mesh-shaped resin molded product. By heating the resin, the resin in the peripheral portion of the second area, which is the area of the joint portion 13 between the first resin linear portion 11 and the second resin linear portion, is once melted. Furthermore, when the heating is stopped, the peripheral portion of the second area is also fixed, and almost the entire first area, which is the overlapping area of the first resin linear portion 11 and the second resin linear portion 12, is joined, The first resin linear part 11 and the second resin linear part 12 joined to each other are an X link that can swing with each other using the joint part 13 as a fulcrum (fulcrum X1, X2, etc. shown in FIG. 3). The mechanism is lost and fixed.

  In order to lose the X-link mechanism of the mesh-shaped resin molded product, it may be heated to a temperature equal to or higher than the melting point of the resin constituting the mesh-shaped resin molded product, and then cooled. For example, if polyethylene is heated to a temperature higher than 100 to 140 ° C. and polypropylene is heated to a temperature higher than 135 to 165 ° C. and cooled, the X link mechanism is lost. As a heating method, it is preferable to perform a heating process using a so-called “heat gun” or “dryer” in which heat generated by electric heat is heated by a fan.

Next, the usage method of the mesh-shaped resin molded product which concerns on this embodiment is demonstrated.
Each drawing in FIG. 6 is a front view for explaining a method of using the mesh-shaped resin molded product 10 according to the first embodiment. Among these, FIG. 6A shows a normal state where no external force is applied to the reticulated resin molded product 10. FIG. 6B shows a state in which the mesh-shaped resin molded product 10 is compressed to accommodate the contents. FIG. 6C shows a state in which the mesh-shaped resin molded product 10 is stretched. FIG. 6D shows a state in which the linear member 16 is included in the mesh-shaped resin molded product 10.

  In the method for using the mesh-shaped resin molded product according to this embodiment, first, as shown in FIG. 6A, the above-described mesh-shaped resin molded product 10 is prepared. Next, as shown in FIG. 6B, the wiring member 16 is inserted in a state where the mesh-shaped resin molded product 10 is compressed (pressed and contracted) in the axial direction to expand the diameter of the mesh-shaped resin molded product 10. . Thereafter, as shown in FIG. 6C, the mesh-shaped resin molded product 10 is stretched in the axial direction. By doing so, as shown in FIG. 6 (d), the wiring member 16 is encapsulated and covered without causing problems of poor insertion and workability, as shown in FIG. 6 (d). Is possible. That is, in the present embodiment, by using the mesh-shaped resin molded product 10 as described above, the problem of the insertion failure that occurred in the prior art described in the section of the problem to be solved by the above invention, Workability problems can be solved.

  17 to 19 show photographs of the mesh-shaped resin molded product when heated to a temperature equal to or higher than the melting point of the resin constituting part of the mesh-shaped resin molded product to lose stretchability and bendability. .

  Next, the manufacturing method of the mesh-shaped resin molded product which concerns on this embodiment is demonstrated.

FIG. 7 is a front sectional view showing an example of a manufacturing apparatus 50 used in the method for manufacturing a mesh-shaped resin molded product according to the first embodiment.
FIG. 8 is a view showing the structure of the die 60 of the manufacturing apparatus 50 used in the method for manufacturing a reticulated resin molded product according to the first embodiment, in which (a) is a plan sectional view, (b) and ( c) is a partially enlarged plan sectional view. In addition, each figure of FIG. 8 is the plane sectional view seen from upper direction (the connection part 54 side).
FIG. 9 shows the movability of the joint portion 13 between the plurality of first resin linear portions 11 and the plurality of second resin linear portions 12 in the steps of the method for manufacturing the mesh-shaped resin molded product according to the first embodiment. It is a figure for demonstrating an example of the process of improving.
FIG. 10A shows a joint portion 13 between the plurality of first resin linear portions 11 and the plurality of second resin linear portions 11 in the steps of the method for manufacturing the mesh-shaped resin molded product according to the first embodiment. FIG. 10B is a perspective view showing an example of the shape of rollers 75 and 76 (rollers 78 and 79).

In the method for manufacturing a mesh-shaped resin molded product according to the present embodiment, a plurality of first resin linear portions 11 extending in parallel with each other, and a direction intersecting with each other in parallel with each other. A plurality of second resin linear portions 12 extending to the first resin linear portions 11 and the second resin linear portions 12 at the junctions 13 located at the intersections 14 of each other. A mesh-shaped resin molded product 10 bonded to each other is manufactured.
Here, in the intersection part 14 of the 1st resin linear part 11 and the 2nd resin linear part 12 mutually joined, the axis | shaft of both the said 1st resin linear part 11 and the said 2nd resin linear part 12 An orthogonal projection direction P is defined as a direction passing through the centers 11a and 12a and orthogonal to both the axes 11a and 12a.
In this manufacturing method, when the first resin linear portion 11 and the second resin linear portion 12 are viewed in the orthogonal projection direction P, the first resin linear portion 11 and the second resin linear shape are observed. The second area, which is the area of the joint portion 13 between the first resin linear portion 11 and the second resin linear portion 12, is smaller than the first area that is the overlapping area with the portion 12. It has the process of shape | molding the mesh structure 70 by shape | molding the some 1st resin linear part 11 and the some 2nd resin linear part 12 in parallel.

Here, by performing a secondary process on the mesh structure 70, the mesh structure 70 may be the mesh-shaped resin molded product 10 (the mesh-shaped resin molded product 10 is manufactured). The mesh structure 70 may be the mesh-shaped resin molded product 10 itself.
In the present embodiment, the network structure 70 is a primary processed product obtained by resin molding, and the network resin molded product 10 is manufactured by performing secondary processing on the network structure 70. The following explanation will be given.

  The step of forming the network structure 70 is performed by, for example, extruding a resin material through a die 60 using the manufacturing apparatus 50 shown in FIG.

As shown in FIG. 7, the manufacturing apparatus 50 includes a hopper 51 into which a resin material is charged, an extruder 52 that has a screw 53 inside and melts and extrudes the resin material, and the resin material is fed into the network structure 70. A die 60 that is molded into a shape and discharged; a connecting portion 54 that connects the extruder 52 and the die 60 to each other; a sizing 57 that adjusts the inner diameter of the network structure 70 discharged from the die 60; It has.
The manufacturing apparatus 50 further includes a cooling water tank 71 that stores the cooling water 72 and cools the molded network structure 70, a take-off roller 67 that takes up the molded network structure 70, and a winding device (not shown). A roller 68 disposed between the take-up roller 67 and engaging with the mesh structure 70.

The resin material put into the hopper 51 is heated and melted by the extruder 52 and is pushed out to the connecting portion 54 side by the screw 53.
In the connecting portion 54, a flow path is formed in which the internal space of the extruder 52 and the internal space of the die 60 are communicated with each other, and the molten resin material (molten resin) passes through the flow path. 60.

  The die 60 has a double structure having a first portion 61 and a second portion 64.

The first portion 61 has a conical outer peripheral surface 62.
The first portion 61 is arranged in such a posture that the center axis of the cone is along the vertical direction, and the bottom side of the cone is down and the top side is up.
A plurality of first grooves 63 (see FIG. 8) extending in parallel with each other are formed on the outer peripheral surface 62 along the generatrix of the outer peripheral surface 62 (the conical bus forming the outer peripheral surface 62). .
As shown in FIG. 8A, a plurality of first grooves 63 are formed at predetermined intervals (for example, constant intervals) in the circumferential direction of the outer peripheral surface 62 at the lower end portion of the outer peripheral surface 62 of the first portion 61. Yes.

The second portion 64 has a conical inner peripheral surface 65.
The second portion 64 is arranged such that its inner peripheral surface 65 is coaxial with the outer peripheral surface 62 of the first portion 61, and the conical bottom side is down and the top side is up.
In the inner peripheral surface 65, a plurality of second grooves 66 (see FIG. 8) extending in parallel with each other are formed along the generatrix of the inner peripheral surface 65 (the conical bus forming the inner peripheral surface 65). Has been.
As shown in FIG. 8A, a plurality of second grooves 66 are formed at predetermined intervals (for example, constant intervals) in the circumferential direction of the inner peripheral surface 65 at the lower end portion of the inner peripheral surface 65 of the second portion 64. Has been.

The first portion 61 is disposed inside the inner peripheral surface 65 of the second portion 64. Therefore, the outer peripheral surface 62 of the first portion 61 and the inner peripheral surface 65 of the second portion 64 face each other.
That is, grooves (first groove 63 and second groove 66) that open toward each other are formed on the outer peripheral surface 62 and the inner peripheral surface 65, respectively.
The outer peripheral surface 62 and the inner peripheral surface 65 are in sliding contact with each other on the discharge side of the resin material from the die 60, that is, on the lower end side of the die 60.

  In the upper part of the die 60, the outer peripheral surface 62 and the inner peripheral surface 65 are separated from each other. For this reason, the molten resin flowing down from the connecting portion 54 can be smoothly received in the gap between the outer peripheral surface 62 and the inner peripheral surface 65.

  The die 60 is configured so that the first portion 61 and the second portion 64 can be relatively rotated around the axis.

The first portion 61 is suspended and supported by a rotating shaft 55 that extends upward from the upper end of the first portion 61 coaxially with the first portion 61 (coaxial with the conical shape constituting the outer peripheral surface 62 of the first portion 61). ing. The rotation shaft 55 is driven by a first rotation drive mechanism (not shown) and rotates around the axis. Along with this rotation, the first portion 61 to which the rotation shaft 55 is fixed also rotates around the axis.
The rotating shaft 55 is pivotally supported by a shaft support hole formed in the upper portion of the connecting portion 54.

On the other hand, a donut-shaped wheel 56 is fixed to the lower end portion of the second portion 64 coaxially with the second portion 64 (coaxial with the conical shape constituting the inner peripheral surface 65 of the second portion 64). The wheel 56 is driven by a second rotation drive mechanism (not shown) and rotates around the axis. With this rotation, the second portion 64 rotates around the axis.
Note that the upper end portion of the second portion 64 is held at the lower portion of the connecting portion 54 so as to be rotatable around the axis of the second portion 64 relative to the connecting portion 54.
In the center of the wheel 56, an opening having a larger diameter than the lower end of the discharge portion of the die 60, that is, the outer peripheral surface 62 of the first portion 61 and the inner peripheral surface 65 of the second portion 64 is formed. And in the plan view, the discharge part of the die 60 is accommodated inside the opening of the wheel 56.

Here, the rotation direction or the rotation speed (angular velocity) of the first portion 61 and the second portion 64 is set so that the first portion 61 and the second portion 64 rotate relatively around the axis.
More specifically, for example, the first portion 61 and the second portion 64 are rotated in opposite directions. In this case, the first part 61 and the second part 64 may be rotated at the same rotational speed, but the rotational speeds of the first part 61 and the second part 64 may be different from each other.
For example, the first portion 61 and the second portion 64 are rotated at a constant rotation speed, respectively. By doing in this way, the spiral winding pitch of each of the first resin linear portion 11 and the second resin linear portion 12 is made constant in the longitudinal direction of the mesh structure 70 and thus the mesh-shaped resin molded product 10. can do.

The sizing 57 is formed in a columnar shape or a cylindrical shape, and is disposed below the wheel 56 coaxially with the first portion 61 and the second portion 64 of the die 60.
The sizing 57 is supported by being suspended from the lower surface of the second portion 64 via a sizing support portion 58 having a bar shape or the like. The upper end of the sizing support portion 58 is fixed to the lower surface of the second portion 64 through the opening of the wheel 56.
Note that the sizing 57 is rotatable around the axis with respect to the first portion 61, for example. For this reason, transmission of rotational force from the first portion 61 to the sizing 57 is suppressed. Accordingly, the sizing 57 is prevented from rotating inside the mesh structure 70 discharged from the die 60, and the sizing 57 is idle with respect to the first portion 61.
In the manufacturing method according to the present embodiment, from the viewpoint of stably forming the mesh structure 70, the molding conditions are appropriately set to suppress the rotation of the sizing 57 and reduce the resistance of the sizing 57. It becomes important.

Here, the inner diameters of the mesh structure 70 and the mesh-shaped resin molded product 10 are molded to a size corresponding to the outer diameter of the sizing 57.
The outer diameter of the sizing 57 is set to be equal to or less than the diameter of the discharge portion of the die 60, that is, the diameter of the lower end of the outer peripheral surface 62 of the first portion 61 and the inner peripheral surface 65 of the second portion 64.
That is, the step of forming the mesh structure 70 is performed in a state where the sizing 57 whose outer diameter is equal to or smaller than the diameter of the discharge portion of the die is disposed on the downstream side of the die 60. That is, the mesh structure 70 (mesh resin molded product 10) is molded by so-called deflation molding.
Thereby, the mesh structure 70 and the mesh-shaped resin molded product 10 can be molded so that the inner diameters of the mesh structure 70 and the mesh-shaped resin molded product 10 are equal to or less than the diameter of the discharge portion of the die 60.

  The take-up roller 67 is constituted by a pair of rotating rollers, and is disposed further below the sizing 57. The take-up roller 67 takes up the mesh structure 70 (mesh structure 70 b) formed by the sizing 57.

  In the cooling water tank 71, for example, the cooling water 72 is stored up to the same water level as the height of the lower surface of the wheel 56. The sizing 57 and the take-up roller 67 are submerged in the cooling water 72.

The roller 68 is disposed downstream of the take-up roller 67.
The roller 68 is disposed outside the cooling water tank 71 and engages with the mesh structure 70 (mesh structure 70 c) after being cooled by the cooling water 72.

The manufacturing apparatus 50 includes, for example, a mobility improving mechanism shown in FIG. 9 or FIG.
The mobility improving mechanism is for performing secondary processing for improving the mobility of the joint portion 13 between the plurality of first resin linear portions 11 and the plurality of second resin linear portions 12.
The mobility improving mechanism is disposed on the downstream side of the roller 68 (FIG. 7) and on the upstream side of a winding device (not shown).

  In this secondary processing, the angle formed by the first resin linear portion 11 and the second resin linear portion 12 that are joined to each other at the joint portion 13 with respect to the mesh structure 70c that is a primary processed product is changed. The mesh structure 70c is deformed by applying a force in the direction of the movement. More specifically, a force is applied to the mesh structure 70c in the direction in which the angle formed by the first resin linear portion 11 and the second resin linear portion 12 changes with the orthographic projection direction P as a rotation axis. In addition, the mesh structure 70c is deformed.

By deforming the mesh structure 70c in this way, the joint portion 13 becomes weak (the torsional rigidity of the joint portion 13 decreases), and as a result, the mobility of the joint portion 13 is improved.
For example, the joint portion 13 is weakened without breaking (peeling). More specifically, for example, a deformation in which elastic deformation and plastic deformation are mixed occurs in the joint portion 13, whereby the joint portion 13 remains connected (without breaking the joint portion 13). Is partially stretched (plastically deformed), the torsional rigidity of the joint portion 13 is reduced.
Or the junction part 13 becomes weak by partially fracture | rupturing (peeling) (for example, a peripheral part fracture | ruptures). In this case, the method for manufacturing the reticulated resin molded product 10 is to apply a force to the joint between the first resin linear portion 11 and the second resin linear portion 12 by deforming the primary processed product, and to perform the joining. This includes a step of partially breaking (peeling) the part to leave a part (for example, the central part) of the joint as the final joint 13.

The mobility improving mechanism shown in FIG. 9 includes a stretching roller 73 and a stretching roller 74 arranged on the downstream side of the stretching roller 73.
The stretching roller 73 is applied with a rotational driving force by a first roller driving mechanism (not shown), rotates at a first rotational speed while being engaged with the mesh structure 70c, and has a mesh structure at a first transport speed. The body 70c is conveyed downstream.
The stretching roller 74 is given a rotational driving force by a second roller driving mechanism (not shown), and rotates at a second rotational speed higher than the first rotational speed in a state of being engaged with the mesh structure 70c. The mesh structure 70c is transported downstream at a second transport speed that is higher than the first transport speed.
Thereby, the mesh structure 70c is stretched (that is, deformed) between the stretching roller 73 and the stretching roller 74 in the axial direction of the mesh structure 70c. Thereby, the mobility of the junction part 13 of the some 1st resin linear part 11 of the mesh structure 70c and the some 2nd resin linear part 12 improves.
That is, when the mobility improving mechanism of FIG. 9 is used, a plurality of first resin linear portions 11 and a plurality of second resin linear portions are formed by stretching a mesh-like resin tube as the mesh structure 70c in the axial direction. The process of improving the movability of the joint part 13 with 12 is performed.

As shown in FIG. 9, the network structure 70 c is wound around the stretching roller 73 (for example, a plurality of times) so that the network structure 70 c can be sufficiently gripped by the stretching roller 73. It is preferable to transport the mesh structure 70c. By doing in this way, the slip of the mesh structure 70c with respect to the stretching roller 73 can be suppressed.
It is also preferable that the surface of the stretching roller 73 is an uneven surface (rough surface) so that the network structure 70 c can be sufficiently gripped by the stretching roller 73.

Similarly, as shown in FIG. 9, the network structure 70 c is wound around the stretching roller 74 (for example, a plurality of turns) so that the network structure 70 c can be sufficiently gripped by the stretching roller 74. It is preferable to transport the mesh structure 70 c by the roller 74. By doing in this way, the slip of the mesh structure 70c with respect to the stretching roller 74 can be suppressed.
It is also preferable that the surface of the stretching roller 74 is a rough surface (rough surface) so that the network structure 70 c can be sufficiently gripped by the stretching roller 74.

On the other hand, the mobility improving mechanism shown in FIG. 10 includes a diameter expanding member 77 that expands the mesh structure 70 c, a pair of rollers 75, 76 disposed on the upstream side of the diameter expanding member 77, and the diameter expanding member 77. And a pair of rollers 78 and 79 disposed on the downstream side (FIG. 10A).
The diameter-enlarging member 77 is a rugby ball-shaped (or egg-shaped) member having a shorter diameter than the inner diameter of the mesh structure 70c, and the longer diameter is arranged along the conveying direction of the mesh structure 70c.
The distance from the pair of rollers 75 and 76 to the pair of rollers 78 and 79 is set to be slightly longer than the long diameter of the diameter-expanding member 77.

The pair of rollers 75 and 76 conveys the mesh structure 70c to the downstream side with the mesh structure 70c sandwiched therebetween. As a result, the mesh structure 70 c is extrapolated around the diameter expanding member 77. The pair of rollers 75 and 76 is given a rotational driving force by a roller driving mechanism (not shown).
The pair of rollers 78 and 79 convey the mesh structure 70c to the downstream side in a state where the mesh structure 70c is sandwiched between them. The pair of rollers 78 and 79 may or may not be given a driving force.
The diameter-expanding member 77 is surrounded by the mesh structure 70c between the pair of rollers 75 and 76 and the pair of rollers 78 and 79, and is held by the mesh structure 70c.
Further, the pair of rollers 78 and 79 on the downstream side restricts the diameter expanding member 77 from being pushed downstream.

As shown in FIG. 10 (b), an arc-shaped groove 700 is formed in the center in the width direction of each of the rollers 75, 76, 78, and 79. ing.
Thereby, the mesh structure 70c can be held with an appropriate clamping force in the gap between the grooves 700 of the pair of rollers 75 and 76, and similarly, with an appropriate clamping force in the gap between the grooves 700 of the pair of rollers 78 and 79. The mesh structure 70c can be held.
Further, the downstream end of the diameter-expanding member 77 can be suitably positioned in the gap between the grooves 700 of the pair of rollers 78 and 79 on the downstream side.

When the mobility of the joint portion 13 is improved by the mobility improvement mechanism shown in FIG. 10, the mesh structure 70 c is conveyed downstream while the mesh structure 70 c is extrapolated with respect to the diameter expanding member 77. Thereby, when the mesh structure 70c passes around the diameter-expanding member 77, the mesh structure 70c is expanded in diameter and compressed in the axial direction. For this reason, the mobility of the junction part 13 of the some 1st resin linear part 11 and the some 2nd resin linear part 12 of the mesh structure 70c improves.
That is, when the mobility improving mechanism of FIG. 10 is used, a plurality of first resin linear portions 11 and a plurality of second resin linear shapes are formed by pressing and contracting the mesh-like resin tube as the mesh structure 70c in the axial direction. The process of improving the mobility of the joint part 13 with the part 12 will be performed.

Here, the strength of the force sandwiching the mesh structure 70c between the pair of rollers 75 and 76 and between the pair of rollers 78 and 79 is the first resin linear portion 11 of the mesh structure 70c. And it is preferable to restrict | limit to the intensity | strength of the grade which the 2nd resin linear part 12 does not bend. By doing in this way, the fall of the elasticity of the mesh-shaped resin molded product 10 by the 1st resin linear part 11 and the 2nd resin linear part 12 bending can be suppressed.
In addition, the surfaces of the rollers 75, 76, 78, and 79 are rough surfaces so that the mesh structure 70 c can be sufficiently gripped by the pair of rollers 75, 76 and the pair of rollers 78, 79. It is also preferable.

  Hereinafter, a series of operations for manufacturing the reticulated resin molded product 10 using the manufacturing apparatus 50 will be described.

  When manufacturing the reticulated resin molded product 10, the molten resin is extruded by the extruder 52, the molten resin (that is, the reticulated structure 70 a) is discharged from the die 60, and the reticulated roller 67 takes off the reticulated structure 70 b. Then, the operation of improving the mobility of the joint portion 13 of the mesh structure 70c by the mobility improving mechanism and the winding of the mesh-shaped resin molded product 10 by a winding device (not shown) are continuously performed in parallel.

  First, the resin material introduced into the hopper 51 is heated and melted by the extruder 52 and supplied to the die 60 through the flow path of the connecting portion 54.

  Here, the first portion 61 and the second portion 64 of the die 60 are relatively rotated around the axis.

As shown in FIG. 8B, at the timing when the first groove 63 of the first portion 61 and the second groove 66 of the second portion 64 are separated from each other, the first resin linear portion 11 and the second portion The resin linear portion 12 is discharged from the discharge port of the die 60 while being separated from each other.
That is, the 1st resin linear part 11 is shape | molded by the resin material discharged from between the 1st groove | channel 63 and parts other than the formation location of the 2nd groove | channel 66 in the internal peripheral surface 65 of the 2nd part 64. FIG. The At the same time, the first resin linear portion 11 is separated by the resin material discharged from between the second groove 66 and the portion of the outer peripheral surface 62 of the first portion 61 other than the portion where the first groove 63 is formed. The second resin linear portion 12 is molded.

On the other hand, as shown in FIG. 8C, at the timing when the first groove 63 of the first portion 61 and the second groove 66 of the second portion 64 face each other and communicate with each other, the first intersecting each other. The resin linear portion 11 and the second resin linear portion 12 are discharged from the discharge port of the die 60 in a state where they are bonded to each other via the bonding portion 13.
That is, the first resin linear portion 11 and the second resin linear portion 12 that are integrated with each other are discharged from the opening formed by the combination of the first groove 63 and the second groove 66.
The joining part 13 is a fused part in which the first resin linear part 11 and the second resin linear part 12 are fused to each other.

  Thus, the mesh structure 70 (mesh structure 70a) having the same shape as the mesh-shaped resin molded product 10 shown in FIG. 1 is continuously ejected from the discharge port of the die 60.

  As described above, in the step of forming the mesh structure 70, the first portion 61 and the second portion 64 are relatively rotated around the axis, while the gaps between the plurality of first grooves 63 and the second portions 66, and A resin material is extruded through the gaps between the plurality of second grooves 66 and the first portion 61. Thereby, each of the plurality of first resin linear portions 11 is wound in a coaxial spiral shape, and each of the plurality of second resin linear portions 12 is coaxial with each other and the plurality of first resins. A mesh-shaped resin tube formed by being wound around the outer peripheral side of the plurality of first resin linear portions 11 in a spiral shape opposite to the linear portion 11 is formed.

The mesh structure 70 a discharged from the die 60 is submerged in the cooling water 72 in the cooling water tank 71 and is taken up by the take-up roller 67 after being adjusted by the sizing 57 while being cooled by the cooling water 72.
Here, the outer diameter of the sizing 57 is equal to or smaller than the diameter of the discharge portion of the die 60. For this reason, the 1st resin linear part 11 located in the inner peripheral side among the 1st resin linear part 11 and the 2nd resin linear part 12 is with respect to the 2nd resin linear part 12 located in the outer peripheral side. It is suppressed that it is pressed strongly. The outer diameter of the sizing 57 is preferably not less than 0.4 and not more than 1 when the diameter of the discharge part of the die 60 is 1.
For this reason, the expansion of the area of the junction part 13 of the 1st resin linear part 11 and the 2nd resin linear part 12 is suppressed moderately. As a result, in the mesh structure 70 (mesh structure 70b) that has undergone adjustment of the inner diameter by the sizing 57, and thus in the mesh-shaped resin molded product 10, as shown in FIG. 1C, the second area is larger than the first area. Becomes smaller.
Here, in order to appropriately adjust the ratio of the second area to the first area, not only the setting of the ratio of the diameter of the discharge portion of the die 60 and the outer diameter of the sizing 57 is appropriately performed, but also a mesh structure. It is important to appropriately set various molding conditions such as the compounding composition and molding temperature of the resin material constituting the body 70 (reticulated resin molded product 10). By doing so, it is possible to stably form a desired network structure 70 having an excellent balance between rigidity and stretchability.

  The mesh structure 70 b after being taken up by the take-up roller 67 is conveyed toward the roller 68 and goes out of the cooling water tank 71 in the process.

The mesh structure 70 (mesh structure 70c) after being engaged with the roller 68 has a mobility improving mechanism shown in FIG. 9 or a mobility shown in FIG. 10 until it is taken up by a winding device (not shown). A step of improving the mobility of each joint portion 13 is performed by the improvement mechanism.
The mesh structure 70 that has undergone this process becomes the mesh-shaped resin molded product 10.

  Thus, in the manufacturing method according to the present embodiment, the step of forming the mesh structure 70, the step of cooling the mesh structure 70, and the step of improving the mobility of the joint portion 13 are performed in this order.

  Note that the mesh-shaped resin molded product 10 that is the mesh structure 70 that has undergone the step of improving the mobility of each joint portion 13 does not necessarily have to be wound around a winding device. It may be cut into dimensions.

According to the first embodiment as described above, when the first resin linear portion 11 and the second resin linear portion 12 joined to each other are viewed in the orthographic projection direction P, the first More than the 1st area which is the overlap area of the resin linear part 11 and the said 2nd resin linear part 12, of the junction part 13 of the said 1st resin linear part 11 and the said 2nd resin linear part 12 The second area, which is the area, is small.
Thereby, since the favorable mobility of the junction part 13 is realizable, the mesh-shaped resin molded product 10 can be made excellent in the elasticity. Therefore, the mesh-shaped resin molded product 10 can be expanded and contracted with a light force.
Since the mesh-shaped resin molded product 10 can exhibit local stretchability in both the axial direction and the radial direction, the flexibility is also good.

  Further, as described above, the mesh-shaped resin molded product 10 according to the present embodiment is good in terms of local stretchability and flexibility in both the axial direction and the radial direction. Therefore, this mesh-shaped resin molded product 10 can also be used as a flexible protective material or a binding material. Furthermore, the mesh-shaped resin molded product 10 according to the present embodiment can impart stretchability only to the portion to which the stress is applied by locally applying a stress from the outside. Therefore, the mesh-shaped resin molded product 10 according to the present embodiment can also be used as a harness member of a movable part (location where the length changes).

  In addition, as described with reference to FIG. 4C, the mesh-shaped resin molded product 10 according to the present embodiment expands in diameter when compressed in the axial direction (when compressed). Therefore, by setting the mesh-shaped resin molded product 10 in a compressed state in the axial direction, unlike the conventional cover member, the mesh-shaped resin molded product 10 is simultaneously combined with a plurality of wiring members 16 in a bundled member. Can be accommodated.

  Furthermore, the stretchable and bendable properties of the mesh-shaped resin molded product 10 can be extinguished when the mesh-shaped resin molded product 10 is heated to the melting point or higher of the mesh-shaped resin molded product. That is, by heating the mesh-shaped resin molded product 10 that can be stretched and bent at the time of installation to the melting point or higher of the mesh-shaped resin molded product when the installation position is determined, the stretchability and the bendability are eliminated and locked. be able to. The part where the stretchability and the bendability disappear can be the whole or a part of the mesh-shaped resin molded product.

When the mesh-like resin molded product 10 is a mesh-like resin tube as in this embodiment, the mesh-like resin molded product 10 can be expanded and contracted in the axial direction with a light force.
The mesh-shaped resin molded product 10 that is a mesh-shaped resin tube has a reduced diameter when stretched in the axial direction and expands when compressed in the axial direction.
In addition, also when the mesh-shaped resin molded product 10 which is a mesh-shaped resin tube is compressed from the periphery in the radial direction (for example, when gripped by hand), the mesh-shaped resin molded product 10 is reduced in diameter.
Moreover, since the mesh-shaped resin molded product 10 also has good flexibility, the occurrence of kinks during bending is also suppressed.

More specifically, for example, the first resin linear portion 11 and the second resin linear portion 12 joined to each other constitute an X-link mechanism that can swing relative to each other using the joint portion 13 as a fulcrum. ing.
Therefore, when the mesh-shaped resin molded product 10 expands and contracts or bends in the axial direction, the first resin linear portion 11 and the second resin linear portion 12 that are bonded to each other are connected to each other. The angle changes with respect to 13 as a fulcrum. At that time, for example, the mesh 15 is maintained in a parallelogram shape.
In other words, since the mesh-shaped resin molded product 10 can be expanded and contracted without substantially bending (bending) each first resin linear portion 11 and each second resin linear portion 12, the mesh-shaped resin molded product 10. A large stretch ratio can be obtained.

  Further, the stretchable and bendable properties of the reticulated resin molded product 10 can be extinguished when the reticulated resin molded product 10 is heated to the melting point or higher of the reticulated resin molded product, so that the predetermined position It is possible to maintain the stretchability and the bendability during the operation of mounting the mesh-shaped resin molded product, and to extinguish and fix the stretchability and the bendability after the positioning is completed. By heating the mesh-shaped resin molded product 10 that can be stretched and bent at the time of installation to the melting point or higher of the mesh-shaped resin molded product when the installation position is determined, the stretchability and curvature can be eliminated and locked. it can. The part where the stretchability and the bendability disappear can be the whole or a part of the mesh-shaped resin molded product.

  That is, at the intersection 14 of the first resin linear portion 11 and the second resin linear portion 12 joined to each other in FIG. 1C, the mesh-shaped resin molded product has a melting point higher than that of the mesh-shaped resin molded product. By heating the resin, the resin in the peripheral portion of the second area, which is the area of the joint portion 13 between the first resin linear portion 11 and the second resin linear portion, is once melted. Furthermore, when the heating is stopped, the peripheral portion of the second area is also fixed, and almost the entire first area, which is the overlapping area of the first resin linear portion 11 and the second resin linear portion 12, is joined, The first resin linear part 11 and the second resin linear part 12 joined to each other are an X link that can swing with each other using the joint part 13 as a fulcrum (fulcrum X1, X2, etc. shown in FIG. 3). The mechanism is lost and fixed.

  In order to lose the X-link mechanism of the mesh-shaped resin molded product, it may be heated to a temperature equal to or higher than the melting point of the resin constituting the mesh-shaped resin molded product, and then cooled. For example, if polyethylene is heated to a temperature higher than 100 to 140 ° C. and polypropylene is heated to a temperature higher than 135 to 165 ° C. and cooled, the X link mechanism is lost. As a heating method, it is preferable to perform a heating process using a so-called “heat gun” or a dryer that uses heat generated by electric heat as hot air by a fan.

  The mesh-shaped resin molded product can be used for the purpose of design, in addition to the purpose of using it as a protective material for piping members such as water pipes and hydraulic pipes, and wiring members such as electric wires, cables and wire harnesses. The mesh-shaped resin molded product has stretchability and bendability before heating, and has so-called shape memory property that the stretchability and bendability disappear after heating. Utilizing such characteristics, after creating a three-dimensional model such as a ring or heart shape with the tube of the mesh-shaped resin molded product, the three-dimensional model can be heated and cooled to fix the three-dimensional model Is possible.

  Here, FIG. 16 is a figure for demonstrating operation | movement of the mesh-shaped resin molded product which concerns on a comparison form, Among these, (a) is the normal state in which the external force is not provided to the mesh-shaped resin molded product which concerns on a comparison form (B) shows the state where the mesh-shaped resin molded product according to the comparative embodiment is stretched.

The mesh-shaped resin molded product according to the comparative embodiment extends in a direction intersecting with each of the first resin linear portions 81 in parallel with each other and the plurality of first resin linear portions 81 extending in parallel with each other. A plurality of second resin linear portions 82. Each 1st resin linear part 81 and each 2nd resin linear part 82 are mutually joined in the junction part located in a mutual intersection.
In these points, the mesh-shaped resin molded product according to the comparative embodiment is the same as the mesh-shaped resin molded product 10 according to the present embodiment.
However, in the mesh-shaped resin molded product according to the comparative embodiment, the first area and the second area are equal to each other.

The mesh-shaped resin molded product according to the comparative form is manufactured by, for example, so-called inflation molding performed using a sizing having an outer diameter larger than the diameter of the discharge portion of the die.
For this reason, since the 1st resin linear part 81 is strongly pressed with respect to the 2nd resin linear part 82 when a mesh-shaped resin molded product passes sizing, a 1st area and a 2nd area are mutually equal. It becomes the area.
Therefore, the mobility of the joint between the first resin linear part 81 and the second resin linear part 82 is poor, and the first resin linear part 81 and the second resin linear part 82 are substantially at the joint. And are fixed to each other.
When the mesh-shaped resin molded product is stretched in the direction of the arrow shown in FIG. 16B, the first resin linear portion 81 and the first resin linear portion 81 having the joint as a fulcrum (fulcrum X11, X12, etc. shown in FIG. 16). 2 A relative angle change with the resin linear part 82 does not occur substantially. Instead, the first resin linear portion 81 and the second resin linear portion 82 are bent and deformed (bend deformation), whereby the mesh-shaped resin molded product is extended.
For this reason, the reticulated resin molded product according to the comparative embodiment has a smaller expansion / contraction rate than the reticulated resin molded product 10 according to the present embodiment.
Note that the length L13 shown in FIG. 16B is shorter than the length L11 shown in FIG. Note that the area of the mesh 85 shown in FIG. 16B is smaller than the area of the mesh 85 shown in FIG.
When the mesh-shaped resin molded product according to the comparative example expands and contracts in the direction of the arrow shown in FIG. 16B, the four sides forming the mesh are bent (FIG. 16B), and the original straight line The mesh-shaped resin molded product is deformed between the state (FIG. 16 (a)) that has returned to the shape. For this reason, the distance between the fulcrum X11 and the fulcrum X12 expands and contracts with expansion and contraction of the mesh-shaped resin molded product.

  Note that the mesh-shaped resin molded product according to the comparative form can extend to some extent in the direction of the arrow in FIG. 16B, but extends in the direction orthogonal to the arrow in FIG. It is difficult (it hardly grows).

[Second Embodiment]
FIG. 11 is a plan view of the reticulated resin molded product 10 according to the second embodiment, in which (a) shows a normal state where no external force is applied to the reticulated resin molded product 10, and (b) The reticulated resin molded product 10 is shown stretched in the first direction, and (c) shows the reticulated resin molded product 10 stretched in a second direction orthogonal to the first direction. .

  In the first embodiment, the example in which the mesh-like resin molded product 10 is used in the form of a mesh-like resin tube has been described. However, in the case of this embodiment, the mesh-like resin molded product 10 is in a sheet-like form. You may process and use. As a method of processing the mesh-shaped resin molded product 10 into a sheet shape, after manufacturing the mesh-shaped resin molded product 10 that is a mesh-shaped resin tube as in the first embodiment, the mesh-shaped resin molded product 10 is The target mesh-shaped resin molded product 10 can be obtained by incising and developing.

Therefore, the joint portions 13 between the first resin linear portions 11 and the second resin linear portions 12 are the same as those in the first embodiment in the present embodiment. For this reason, the stretchability of the mesh-shaped resin molded product 10 is the same as that of the first embodiment.
As shown in FIG. 11, the reticulated resin molded product 10 can greatly expand and contract in the first direction, and can also expand and contract in a second direction orthogonal to the first direction.

  In each of the above embodiments, the example in which the first portion 61 and the second portion 64 of the die 60 are rotated in the opposite directions to each other at a constant rotation speed is described, but the present invention is not limited to this example. By changing the relative movement between the first portion 61 and the second portion 64 in various ways, the mesh shape of the mesh-like resin tube can be changed in various ways.

  Further, even in the flat sheet of the mesh-shaped resin molded product 10, the flexible stretchability and bendability can be extinguished when the planar sheet of the mesh-shaped resin molded product 10 is heated above the melting point of the mesh-shaped resin molded product. Is possible. Since this mode is the same as that of the first embodiment, it is omitted.

<Example 1>
As the mesh-shaped resin molded product 10 according to Example 1, the mesh-shaped resin molded product 10 according to the first embodiment was manufactured. Using block polypropylene containing carbon black (average particle size: 66 μm) as the resin material, the major diameter (width direction) of the elliptical first resin linear portion 11 and second resin linear portion 12 is 1.4 mm, The minor axis (thickness direction) is 1.2 mm, the number of the first resin linear portions 11 is 12, the number of the second resin linear portions 12 is 12, and between the intersections in the mesh structure 70c that is a primary processed product The pitch (distance between adjacent intersections, that is, the distance between the centers of adjacent joints 13) is 7.0 mm in the axial direction of the mesh-shaped resin tube, 3.0 mm in the width direction of the mesh-shaped resin tube, and a primary processed product. The mesh-shaped resin tube as the mesh structure 70c has an inner diameter of 9.0 mm, and the winding pitch of the first resin linear portion 11 and the second resin linear portion 12 (the first resin linear portion 11 and the second resin). The linear part 12 makes one round To that, the length of the structural network 70c in the axial direction of the network resin tube) was as molding conditions such that 84.0Mm. And the mobility of the junction part 13 was improved by expanding and contracting the network structure 70c after shaping | molding by an axial direction manually, and the mesh-shaped resin molded product 10 which concerns on Example 1 was obtained. The content of carbon black relative to the total amount of the resin material was 1% by mass.
At the intersection of the first resin linear part 11 and the second resin linear part 12 in the obtained mesh-like resin molded product 10, the axes of both the first resin linear part 11 and the second resin linear part 12 When the first resin linear portion 11 and the second resin linear portion 12 are viewed in the orthographic projection direction, the direction passing through the center and orthogonal to both of the axes is the orthographic projection direction. The overlapping area A (first area) of the first resin linear part 11 and the second resin linear part 12 and the area B of the joint part between the first resin linear part 11 and the second resin linear part 12 The ratio of (second area) and the value of B / A were 0.54.

  FIG. 12 is a view (both are micrographs) showing the vicinity of the joint portion 13 of the reticulated resin molded product 10 according to the first embodiment, in which (a) performs a step of improving the mobility of the joint portion 13. The previous state (the state of the mesh structure 70c) is shown, and (b) and (c) show the state after the process (the state of the mesh-shaped resin molded product 10). FIG. 12B shows a state in which the mesh-shaped resin molded product 10 is stretched in the axial direction, and FIG. 12C shows a state in which the mesh-shaped resin molded product 10 is compressed in the axial direction.

It was confirmed that the stretchability of the mesh-like resin tube was improved by performing the step of improving the mobility of the joint portion 13 as compared to before performing the step.
From the comparison between FIG. 12 (a) and FIGS. 12 (b) and 12 (c), elastic deformation and plastic deformation are mixed in the joint portion 13 by performing a process of improving the mobility of the joint portion 13. The joint portion 13 is partially stretched (plastically deformed) while the entire joint portion 13 is connected (without breakage (peeling) of the joint portion 13). It can be seen that the part is whitened.
That is, it was found that the mobility of the joint portion 13 can be improved by performing the secondary processing in which the joint portion 13 changes in this way.

FIG. 13 is a view for explaining the operation of the mesh-shaped resin molded product 10 according to Example 1, in which (a) shows a normal state where no external force is applied to the mesh-shaped resin molded product 10, b) shows a state in which the reticulated resin molded product 10 is stretched in the axial direction, and (c) shows a state in which the reticulated resin molded product 10 is compressed in the axial direction.
From FIG. 13, it can be seen that the reticulated resin molded product 10 can be expanded and contracted very greatly. In particular, it can be seen that the expansion / contraction ratio between the normal state (FIG. 13A) and the compressed state (FIG. 13C) is very large.

<Example 2>
As the mesh-shaped resin molded product 10 according to Example 2, the mesh-shaped resin molded product 10 according to the first embodiment was manufactured. Using block polypropylene containing carbon black (average particle size: 66 μm) as the resin material, the major axis (width direction) of each of the elliptical first resin linear part 11 and second resin linear part 12 is 0.7 mm, The minor axis (thickness direction) is 0.6 mm, the number of the first resin linear portions 11 is 14, the number of the second resin linear portions 12 is 14, and between the intersections in the mesh structure 70c that is a primary processed product Pitch (distance between adjacent intersections, that is, distance between the centers of adjacent joints 13) is 5.5 mm in the axial direction of the mesh-shaped resin tube, and 5.5 mm in the width direction of the mesh-shaped resin tube. The molding conditions were such that the inner diameter of the mesh resin tube as the mesh structure 70c was 25 mm, and the winding pitch of the first resin linear portion 11 and the second resin linear portion 12 was 77.0 mm. And the mobility of the junction part 13 was improved by expanding and contracting the network structure 70c after a shaping | molding by an axial direction manually, and the mesh-shaped resin molded product 10 which concerns on Example 2 was obtained. The content of carbon black relative to the total amount of the resin material was 1% by mass.
At the intersection of the first resin linear part 11 and the second resin linear part 12 in the obtained mesh-like resin molded product 10, the axes of both the first resin linear part 11 and the second resin linear part 12 When the first resin linear portion 11 and the second resin linear portion 12 are viewed in the orthographic projection direction, the direction passing through the center and orthogonal to both of the axes is the orthographic projection direction. The overlapping area A (first area) of the first resin linear part 11 and the second resin linear part 12 and the area B of the joint part between the first resin linear part 11 and the second resin linear part 12 The ratio of (second area) and the value of B / A were 0.38.

FIG. 14 is a diagram for explaining the operation of the mesh-shaped resin molded product 10 according to Example 2, in which (a) shows a normal state where no external force is applied to the mesh-shaped resin molded product 10, b) shows a state in which the reticulated resin molded product 10 is stretched in the axial direction, and (c) shows a state in which the reticulated resin molded product 10 is compressed in the axial direction.
From FIG. 14, it can be seen that the mesh-shaped resin molded product 10 can be expanded and contracted further than in the first embodiment. In particular, it can be seen that the expansion / contraction ratio between the normal state (FIG. 14A) and the compressed state (FIG. 14C) is very large.

FIG. 15 is a diagram showing the measurement results of the expansion / contraction rate of the mesh-shaped resin molded product 10 according to Example 1 and Example 2.
In Example 1, the length of the reticulated resin molded product 10 (reticulated) at the time of stretching (FIG. 13B), normal time (FIG. 13A), and pressing (FIG. 13C). The length of the resin tube in the axial direction) was 520 mm, 481 mm, and 130 mm, respectively. That is, the maximum expansion / contraction rate (length at the time of expansion / length at the time of compression) was 4.00.
On the other hand, in Example 2, the length of the reticulated resin molded product 10 at each time of stretching (FIG. 14B), normal time (FIG. 14A), and pressing time (FIG. 14C) is 413 mm, 270 mm and 40 mm, respectively. That is, the maximum expansion / contraction rate was a very large value of 10.33.
Further, in Example 1, the outer diameter of the reticulated resin molded product 10 at the time of stretching (FIG. 13B), at the time of normal operation (FIG. 13A), and at the time of compression (FIG. 13C) ( The outer diameters of the mesh-like resin tubes were 11 mm, 16.5 mm, and 31.5 mm, respectively. That is, the maximum expansion / contraction ratio (outer diameter at the time of compression / outer diameter at the time of expansion) with respect to the outer diameter was 2.86.
On the other hand, in Example 2, the folding width of the reticulated resin molded product 10 at the time of stretching (FIG. 14B), at the time of normal operation (FIG. 14A), and at the time of compression (FIG. 14C) ( The outer diameter (major diameter of the mesh-like resin tube) was 8 mm, 38 mm, and 52 mm, respectively. That is, the maximum expansion / contraction ratio (folding width at the time of pressing / folding width at the time of stretching) of the folding width was 6.50.

<Comparative example>
As a comparative example, a reticulated resin tube was produced by inflation molding under the same materials and molding conditions as in Example 1. However, the mesh-like resin tube had a large joint rigidity and did not exhibit stretchability.

<Example 3>
The point which used the block polypropylene which does not contain carbon black as a resin material, the major axis (width direction) of the elliptical 1st resin linear part 11 and the 2nd resin linear part 12 is 0.6 mm, and a minor axis (thickness direction) Is 0.5 mm, the number of the first resin linear portions 11 is 28, the number of the second resin linear portions 12 is 28, and the pitch between the intersections in the mesh structure 70c that is a primary processed product (adjacent intersections , That is, the distance between the centers of adjacent joints 13) is 2.8 mm in the axial direction of the mesh-shaped resin tube, and 2.8 mm in the width direction of the mesh-shaped resin tube. The inner diameter of the mesh resin tube is 25.0 mm, and the winding pitch of the first resin linear portion 11 and the second resin linear portion 12 (the first resin linear portion 11 and the second resin linear portion 12 are 1). Reticulated resin chain until it goes around The length of the structural network 70c in the axial direction of the chromatography blanking), except that was employed molding conditions such that 78.4Mm, to produce a network resin molded article 10 in the same manner and conditions as in Example 2. As a result, the obtained reticulated resin molded product 10 of Example 3 was excellent in elasticity as in Example 1. Specifically, the length of the reticulated resin molded product 10 of Example 3 (the length in the axial direction of the reticulated resin tube) is 655 mm, 500 mm, and 135 mm in each of the stretched state, the normal state, and the compressed state. Met. That is, the maximum expansion / contraction rate (length at the time of expansion / length at the time of compression) was 4.85.
In addition, the folding width (outer diameter) of the reticulated resin molded product 10 (long diameter of the reticulated resin tube) at the time of stretching, normal time, and pressing was 16 mm, 38 mm, and 50 mm, respectively. That is, the maximum expansion / contraction ratio (folding width at the time of compression / folding width at the time of stretching) of the folding width was 3.13.

<Example 4>
A reticulated resin molded article 10 was produced by the same method and conditions as in Example 2 except that high-density polyethylene containing no carbon black was used as the resin material. As a result, the obtained reticulated resin molded product 10 of Example 4 exhibited the same stretchability as that of Example 3.

<Example 5>
A reticulated resin molded article 10 was produced by the same method and conditions as in Example 3 except that block polypropylene containing titanium oxide as a white pigment was used as the resin material. Moreover, content of the titanium oxide with respect to the whole quantity of the resin material was 2 mass%. As a result, the obtained reticulated resin molded product 10 of Example 5 was excellent in stretchability as in Example 1. Specifically, the length of the reticulated resin molded product 10 of Example 5 (the length in the axial direction of the reticulated resin tube) is 680 mm, 498 mm, and 138 mm in each of the stretched state, the normal state, and the compressed state. Met. That is, the maximum expansion / contraction rate (length at the time of expansion / length at the time of compression) was 4.93.
In addition, the folding width (outer diameter) of the reticulated resin molded product 10 (long diameter of the reticulated resin tube) at the time of stretching, normal time, and pressing was 13 mm, 38 mm, and 50 mm, respectively. That is, the maximum expansion / contraction ratio (folding width at the time of compression / folding width at the time of stretching) of the folding width was 3.85.

<Example 6>
A reticulated resin molded article 10 was produced under the same method and conditions as in Example 3 except that block polypropylene containing carbon black (average particle size: 26 μm) was used as the resin material. The content of carbon black relative to the total amount of the resin material was 2% by mass. As a result, the obtained reticulated resin molded product 10 of Example 6 was excellent in stretchability as in Example 1. Specifically, the length of the reticulated resin molded product 10 of Example 6 (the length in the axial direction of the reticulated resin tube) is 690 mm, 500 mm, and 139 mm in the stretched state, the normal state, and the compressed state, respectively. Met. That is, the maximum expansion / contraction rate (length at the time of expansion / length at the time of compression) was 4.96.
In addition, the folding width (outer diameter) of the reticulated resin molded article 10 (long diameter of the reticulated resin tube) at the time of stretching, normal time, and pressing was 12 mm, 38 mm, and 50 mm, respectively. That is, the maximum expansion / contraction ratio (folding width at the time of pressing / folding at the time of stretching) of the folding width was 4.17.

<Example 7>
A reticulated resin molded article 10 was produced by the same method and conditions as in Example 3 except that block polypropylene containing monoazo red and barium sulfate as a red pigment was used as the resin material. The total content of monoazo red and barium sulfate relative to the total amount of the resin material was 2% by mass. As a result, the obtained reticulated resin molded product 10 of Example 7 was excellent in elasticity as in Example 1. Specifically, the length of the reticulated resin molded product 10 of Example 7 (the length in the axial direction of the reticulated resin tube) is 691 mm, 500 mm, and 141 mm in each of the stretched state, the normal state, and the compressed state. Met. That is, the maximum expansion / contraction rate (length at the time of expansion / length at the time of compression) was 4.90.
In addition, the folding width (outer diameter) of the reticulated resin molded article 10 (long diameter of the reticulated resin tube) at the time of stretching, normal time, and pressing was 12 mm, 38 mm, and 50 mm, respectively. That is, the maximum expansion / contraction ratio (folding width at the time of pressing / folding at the time of stretching) of the folding width was 4.17.

<Example 8>
A reticulated resin molded article 10 was produced by the same method and conditions as in Example 3 except that block polypropylene containing ultramarine blue as a blue pigment was used as the resin material. Moreover, the content of ultramarine with respect to the total amount of the resin material was 2% by mass. As a result, the obtained reticulated resin molded product 10 of Example 8 was excellent in elasticity as in Example 1. Specifically, the length of the reticulated resin molded product 10 of Example 8 (the length in the axial direction of the reticulated resin tube) is 692 mm, 498 mm, and 140 mm in each of the stretched state, the normal state, and the compressed state. Met. That is, the maximum expansion / contraction rate (length at the time of expansion / length at the time of compression) was 4.94.
Further, the folding width (outer diameter) of the reticulated resin molded product 10 (long diameter of the reticulated resin tube) at the time of stretching, normal time, and pressing and shrinking were 11 mm, 38 mm, and 50 mm, respectively. That is, the maximum expansion / contraction ratio (folding width at the time of pressing / folding width at the time of stretching) of the folding width was 4.55.

<Example 9>
A reticulated resin molded article 10 was produced by the same method and conditions as in Example 3 except that block polypropylene containing a petiole as a brown pigment was used as the resin material. In addition, the content of the petite relative to the total amount of the resin material was 2% by mass. As a result, the obtained reticulated resin molded product 10 of Example 9 was excellent in elasticity as in Example 1. Specifically, the length of the reticulated resin molded product 10 of Example 9 (the length in the axial direction of the reticulated resin tube) is 695 mm, 500 mm, and 139 mm in the stretched state, the normal state, and the compressed state, respectively. Met. That is, the maximum expansion / contraction rate (length at the time of expansion / length at the time of compression) was 5.00.
In addition, the folding width (outer diameter) of the reticulated resin molded article 10 (long diameter of the reticulated resin tube) at the time of stretching, normal time, and pressing was 12 mm, 38 mm, and 50 mm, respectively. That is, the maximum expansion / contraction ratio (folding width at the time of pressing / folding at the time of stretching) of the folding width was 4.17.

<Example 10>
A reticulated resin molded article 10 was produced by the same method and conditions as in Example 3 except that block polypropylene containing talc as an extender was used as the resin material. Further, the content of talc relative to the total amount of the resin material was 2% by mass. As a result, the obtained reticulated resin molded product 10 of Example 10 was excellent in elasticity as in Example 3. Specifically, the length of the reticulated resin molded product 10 of Example 10 (the length in the axial direction of the reticulated resin tube) is 698 mm, 498 mm, and 141 mm in each of the stretched state, the normal state, and the compressed state. Met. That is, the maximum expansion / contraction rate (length at the time of expansion / length at the time of compression) was 4.89.
Further, the folding width (outer diameter) of the reticulated resin molded product 10 (long diameter of the reticulated resin tube) at the time of stretching, normal time, and pressing and shrinking were 15 mm, 38 mm, and 50 mm, respectively. That is, the maximum expansion / contraction ratio (folding width at the time of pressing / folding width at the time of stretching) of the folding width was 3.33.
As described above, the reticulated resin molded product 10 of Example 10 is transparent because it contains extender pigments, but is superior in elasticity to the reticulated resin molded product 10 of Example 3 that does not contain pigment. It was.

<Example 11>
In Example 11, after applying an external force to the mesh-shaped resin molded product 10 according to Example 1, the mesh-shaped resin molded product 10 is heated to a temperature equal to or higher than the melting point of the mesh-shaped resin molded product 10. The example which lost the elasticity and curvature was shown.
FIG. 17 is a diagram (photograph) for explaining the procedure and results according to Example 11.
(A) of FIG. 17 shows the natural state in which no external force is applied to the mesh-shaped resin molded product 10 according to Example 1,
(B) shows a state in which the mesh-shaped resin molded product 10 according to Example 1 is stretched in a U-shape by an external force,
(C) shows a state in which the external resin is removed by releasing the hand after the mesh-shaped resin molded product 10 according to Example 1 is stretched in a U-shape curve,
(D) is a case where the mesh-shaped resin molded product 10 according to Example 1 is heated to a temperature equal to or higher than the melting point of the mesh-shaped resin molded product 10 using a heat gun while being stretched in a U-shape by an external force. Shows the state when
(E) After heating the reticulated resin molded product 10 according to Example 1 to a temperature equal to or higher than the melting point of the reticulated resin molded product 10 using a heat gun while being stretched in a U-shape by an external force. Of natural condition without external force.

From FIG. 17, even if the mesh-shaped resin molded product 10 (a) according to Example 1 in the natural state is bent in a U shape (b), the mesh-shaped resin molded product 10 is restored to its original state by releasing the hand. You can see (c) going back. On the other hand, from the state bent in the U-shape (b), if heated to a temperature equal to or higher than the melting point of the mesh-shaped resin molded product 10 using a heat gun (d), it remains curved in the U-shape even when the heating is stopped. In the state of (a), the state does not return.
The heat gun is WELDY PLUS manufactured by Yako Electric Co., Ltd., and the heating temperature is 300 ° C. as the set temperature of the heat gun body. The heating gun was heated with a distance of about 3 cm from the hot air outlet to the mesh-shaped resin molded product.

<Example 12>
In Example 12, after applying an external force to the mesh-shaped resin molded product 10 according to Example 1, the mesh-shaped resin molded product 10 is heated to a temperature equal to or higher than the melting point of the mesh-shaped resin molded product 10. The example which lost the elasticity and curvature was shown.
FIG. 18 is a diagram (photograph) for explaining the procedure and results according to the twelfth embodiment.
(A) of FIG. 18 shows the natural state in which no external force is applied to the mesh-shaped resin molded product 10 according to Example 1,
(B) shows that the mesh-shaped resin molded product 10 according to Example 1 is fitted on a work-assisting iron pipe, the lower half is contracted (the diameter is expanded), and only the lower half is used with a heat gun. The state when heating to a temperature equal to or higher than the melting point of the molded resin molded product 10 is shown,
(C) is when the entire mesh-shaped resin molded product 10 is heated to a temperature equal to or higher than the melting point of the mesh-shaped resin molded product 10 using a heat gun while stretching the mesh-shaped resin molded product 10 of (b) from both ends. State,
(D) shows a state after the heating is stopped from the state of (c).
(E) shows a state when bending is performed while heating to a temperature equal to or higher than the melting point of the mesh-shaped resin molded product 10 using a heat gun from the state of (d),
(F) shows a state after the heating is stopped from the state of (e).

From FIG. 18, the mesh-shaped resin molded product 10 (a) according to Example 1 in the natural state was fitted to the work-assisting iron pipe, and the lower half was contracted (the diameter was expanded), and only the lower half was Was heated to a temperature equal to or higher than the melting point using a heat gun, the lower half of the reticulated resin molded product was fixed in a contracted state with respect to the natural state (a). The state in which the working iron pipe is pulled out and laid down is (c), and the left side of (c) is the same as the lower half of (b).
In (c), the mesh-shaped resin molded product 10 was heated to a temperature equal to or higher than the melting point using a heat gun in a state where the half of the side not heated in (b) was pulled in the horizontal direction and reduced in diameter.
(D) is a reticulated resin molded product 10 at the stage where the processing up to (c) has been completed, and the diameter on the left side is enlarged and the right side is reduced on the right side even when no stress is applied. Recognize.
Further, from the state of (d), when the middle resin portion of the half-reduced side of the mesh-shaped resin molded product 10 was further curved and heated to a temperature higher than the melting point using a heat gun, it could be curved.
Even if heating was stopped in the state of (e), all the portions of the enlarged diameter portion, the reduced diameter portion, and the curved portion did not return to the natural state of (a) (f).
The heat gun is WELDY PLUS manufactured by Yako Electric Co., Ltd., and the heating temperature is 300 ° C. as the set temperature of the heat gun body. The heating gun was heated with a distance of about 3 cm from the hot air outlet to the mesh-shaped resin molded product.

<Example 13>
In Example 13, after applying an external force to the mesh-shaped resin molded product 10 according to Example 2, the mesh-shaped resin molded product 10 is heated to a temperature equal to or higher than the melting point of the mesh-shaped resin molded product 10. The example which lost the elasticity and curvature was shown.
FIG. 19 is a diagram (photograph) for explaining the procedure and results according to Example 13.
(A) of FIG. 19 shows the natural state in which no external force is applied to the mesh-shaped resin molded product 10 according to Example 2,
(B) shows a state in which the mesh-shaped resin molded product 10 according to Example 2 is stretched in a U-shape by an external force,
(C) shows a state in which the reticulated resin molded article 10 according to Example 2 is released from the stress after being stretched in a U-shape and the stress is released.
(D) is a case where the mesh-shaped resin molded product 10 according to Example 2 is heated to a temperature equal to or higher than the melting point of the mesh-shaped resin molded product 10 using a heat gun while being stretched in a U-shape by an external force. Shows the state when
(E) After heating the reticulated resin molded product 10 according to Example 2 to a temperature equal to or higher than the melting point of the reticulated resin molded product 10 using a heat gun while being stretched in a U-shape by an external force. Showed the state.

From FIG. 19, even if the mesh-shaped resin molded product 10 (a) according to Example 1 in the natural state is bent in a U shape (b), the mesh-shaped resin molded product 10 is restored to its original shape by releasing the hand. You can see (c) going back. On the other hand, from the state bent in the U-shape (b), if heated to a temperature equal to or higher than the melting point of the mesh-shaped resin molded product 10 using a heat gun (d), it remains curved in the U-shape even when the heating is stopped. In the state of (a), the state does not return.
The heat gun is WELDY PLUS manufactured by Yako Electric Co., Ltd., and the heating temperature is 300 ° C. as the set temperature of the heat gun body. The heating gun was heated with a distance of about 3 cm from the hot air outlet to the mesh-shaped resin molded product.

DESCRIPTION OF SYMBOLS 10 Reticulated resin molded product 11 1st resin linear part 11a Axis center 12 2nd resin linear part 12a Axis center 13 Joint part 14 Intersection 15 Mesh 16 Wiring member (linear member)
DESCRIPTION OF SYMBOLS 50 Manufacturing apparatus 51 Hopper 52 Extruder 53 Screw 54 Connecting part 55 Rotating shaft 56 Wheel 57 Sizing 58 Sizing support part 60 Die 61 1st part 62 Outer surface 63 First groove 64 Second part 65 Inner surface 66 Second groove 67 Take-off roller 68 Rollers 70, 70a, 70b, 70c Mesh structure 71 Cooling water tank 72 Cooling water 73, 74 Stretching roller 75, 76 Roller 77 Diameter increasing member 78, 79 Roller 81 First resin linear portion 82 Second resin linear Portion 85 Mesh 700 Groove L1, L2, L3 Length L11, L13 Length P Orthographic projection direction X1, X2 Support point X11, X12 Support point

Claims (12)

A plurality of first resin linear portions extending in parallel with each other, and a plurality of second resin linear portions extending in parallel with each other and intersecting each first resin linear portion. In addition, each first resin linear part and each second resin linear part is a mesh-like resin molded product having stretchability and bendability that are joined to each other at a joint located at the intersection of each other,
At the intersection of the first resin linear part and the second resin linear part joined together, both pass through the axes of both the first resin linear part and the second resin linear part and both Assuming that the direction orthogonal to the axial center is the orthographic projection direction, when the first resin linear portion and the second resin linear portion are viewed in the orthographic projection direction, the first resin linear shape The second area, which is the area of the joint between the first resin linear portion and the second resin linear portion, is smaller than the first area, which is the overlapping area between the first resin linear portion and the second resin linear portion. ,
Moreover, when heated above the melting point of the resin molded product, the stretched and curved properties of the heated portion are lost.   The reticulated resin molded product according to claim 1, wherein the second area is 3/4 or less of the first area.   The said 1st resin linear part and the said 2nd resin linear part which were mutually joined comprise the X link mechanism which can mutually rock | fluctuate by using a mutual junction as a fulcrum. Reticulated resin molded product.   The mesh-shaped resin molded product according to claim 3, wherein a swing axis of the X link mechanism extends in the orthogonal projection direction. A plurality of first resin linear portions extending in parallel with each other, and a plurality of second resin linear portions extending in parallel with each other and intersecting each first resin linear portion. In addition, each first resin linear part and each second resin linear part is a mesh-like resin molded product having stretchability and bendability that are joined to each other at a joint located at the intersection of each other,
The first resin linear portion and the second resin linear portion joined to each other constitute an X link mechanism that can swing with each other as a fulcrum,
Moreover, when heated above the melting point of the resin molded product, the stretched and curved properties of the heated portion are lost. At the intersection of the first resin linear part and the second resin linear part joined together, both pass through the axes of both the first resin linear part and the second resin linear part and both If the direction orthogonal to the axis of is the orthographic projection direction,
The mesh-shaped resin molded product according to claim 5, wherein a swing axis of the X link mechanism extends in the orthogonal projection direction. When a pair of the first resin linear portions adjacent to each other and a pair of the second resin linear portions adjacent to each other swing around the respective joint portions as fulcrums,
The mesh formed by the pair of the first resin linear portions adjacent to each other and the pair of the second resin linear portions adjacent to each other is maintained in a parallelogram shape. The mesh-shaped resin molded product according to Item. The reticulated resin molded product is a reticulated resin tube,
Each of the plurality of first resin linear portions is wound in a coaxial spiral shape,
Each of the plurality of second resin linear portions is wound around the outer peripheral side of the plurality of first resin linear portions in a spiral shape that is coaxial with each other and rotates in the opposite direction to the plurality of first resin linear portions. The reticulated resin molded product according to any one of claims 1 to 7.   9. The mesh resin tube according to claim 8, wherein the mesh resin tube is reduced in diameter when the mesh resin tube is stretched in the axial direction, and the diameter of the mesh resin tube is expanded when the mesh resin tube is compressed in the axial direction. Reticulated resin molded product.   The mesh-shaped resin molded product according to any one of claims 1 to 9, wherein the mesh-shaped resin molded product is composed of an olefin-based resin material.   The mesh-shaped resin molded product according to any one of claims 1 to 10, wherein the mesh-shaped resin molded product is made of a resin material containing a pigment. It is a method of using a cylindrical mesh-shaped resin molded product that can be protected by enclosing a linear member in a freely bendable state,
Preparing a reticulated resin molded product according to any one of claims 1 to 11,
Inserting the linear member from the axial direction of the mesh-shaped resin molded product in a state where the mesh-shaped resin molded product is compressed in the axial direction;
After the inserting step, the step of stretching the mesh-shaped resin molded product in the axial direction;
A step of heating a part or all of the reticulated resin molded product to a temperature equal to or higher than the melting point of the reticulated resin molded product to lose the stretchability and curvature of the heated portion,
A method for using a reticulated resin molded product, comprising: