JPH10281127A - Display member for visually recognizing fastened condition in fastened part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the labor of research sharply by visually recognizing whether a fastened part is surely fastened or not from a position separated from the fastened part. SOLUTION: A washer 16, fastened members 12, 11, a washer body display member 21, a spring washer 15, and a nut 14 are arranged in order around a bolt 13, and the nut 14 is fastened. At the time of watching a condition of insufficient fastening, yellow color caused by a material to be recognized visually is not recognized. When a fastening operation is completely carried out, before fastening, the material 3 in a reserving part 4 flows out to a reaching part 5 as the fastening operation is advanced to a condition which is close to a complete condition and the reserving part 4 is compressed. In a condition in which fastening is completed, the inside of the reaching part 5 is filled, and is changed from a recessed shape into a projection shape. At the time of watching a condition in which the fastening operation is completed from a far side, the yellow color of the material to be recognized visually can be recognized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display member for visually confirming a fastening state in a fastening portion.

[0002]

2. Description of the Related Art Conventionally, when two or more members to be fastened, such as building materials, are fastened by using a fastening member consisting of a bolt-nut combination, a screw, and a bolt alone, there are places where forgetting or insufficient fastening is performed. Such a situation often occurs in the construction of a building such as a house.

[0003] In addition, there are buildings where it is necessary to check the fastening state of the fastening portion after a certain period of time after construction or at other regular intervals. For example, there are many public facilities such as power transmission towers. Conventionally, it has been investigated whether the fastening state is reliable by climbing directly to these buildings, actually hitting the intended fastening portion with a hammer, and making a judgment based on the sound.

[0004]

However, an effective method for solving the problem of forgetting to tighten or insufficient tightening has not yet been proposed, and there are still some places where forgetting or insufficient tightening have occurred. By devoting attention to work, the above inconvenience can be reduced to some extent, but there is a problem that work efficiency is instead reduced. In addition, the method of directly confirming the fastening part by climbing to the tower is enormous work and inefficient, and requires a skill of hitting with a hammer to judge with the sound, so human resources are required. There was a problem that it was not possible to secure necessary work because it could not be secured. Inexperienced workers must check the fastening state with a wrench or the like, so that the troublesome work is not the above ratio.

The inventor of the present invention has conducted intensive studies to solve the above-mentioned problems, to reduce forgetting or insufficient tightening of the fastening portion as much as possible, and to make it possible to check the quality of the fastening condition from a distance. Thus, the present invention has been completed.

[0006]

According to the present invention, there is provided (1) a fastening portion for fastening an object to be fastened by a fastening member, between fastening members, between a fastening member and an object to be fastened, or an object to be fastened. It is a display member for visually confirming a fastening state that is disposed and used between the members, an insertion hole through which the member for fastening can be inserted, and a visibility material that is stored and is pressed by fastening of the fastening portion so that the visibility is improved. A visibility substance storage portion configured to be extruded, and a visibility material pushed out from the visibility material storage portion can be stored, and the stored visibility material is configured to be visible from outside. A fastening material in the fastening portion, comprising: a visibility material reaching portion; and a visibility material channel portion having a flow path from the storage portion to the visibility material reaching the reaching portion. Display members, 2) the above (1) Summary of the fastening state visual display member in the fastening portion formed by fixing the washer to the display member for engagement state visible in the fastening portion of the description.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view showing an example of a display member for visually confirming a fastening state in a fastening portion of the present invention, and FIG.
3 is an enlarged view of a main part of FIG. A display member (hereinafter simply referred to as a display member) 1 for visually confirming a fastening state in the fastening portion of the present invention is formed by combining two members of a screw or a bolt, a bolt and a nut, or a washer or a spring washer between them. In a fastening portion in which two or more fastening members are fastened by one or more fastening members such as a combination of members, between two fastening members or between a fastening member and a fastening member, Alternatively, it is used by being arranged between two fastening members.

[0008] The display member 1 includes an insertion hole 2 through which a rod-shaped portion of a fastening member (so-called male screw) having a rod-shaped portion (usually a screw is formed) such as a bolt can be inserted, and a visible substance 3. Is stored, and is deformed when external pressure is applied so that the visible substance is pushed out; and the visible substance storage section 4 (hereinafter simply referred to as storage) ) 4, for example, a transparent material reaching portion (hereinafter simply referred to as a reaching portion) 5 configured to be transparent so as to be able to receive the visible material extruded from the portion 4 and to allow the received visible material to be visually recognized from the outside.
And a visibility substance flow path section (hereinafter, referred to as a flow path section) having a flow path 61 from which the visibility substance extruded from the storage section 4 reaches the arrival section 5.
6, and is generally formed in an annular shape in plan view as shown in FIG. 1, but is not limited to this.

As shown in FIGS. 2 to 4, the storage portion 2 protrudes upward or downward at the outside of the insertion hole 2, at the edge of the insertion hole 2, or at a position close to the insertion hole 2. The position may be any position as long as the pressure of the squeezing pressure is applied to the storage portion 4 when the fastening is completed in the fastening portion. For example, it can be provided at any position indicated by the two-dot chain line in FIG. The storage section 4 is formed so as to be easily deformed by an external force, and protrudes so as to be thicker in either the upper or lower direction than the thickness of the flow path section 6.
Is deformed by being sandwiched by an object to be fastened, a member for fastening, and the like from above and below to apply pressure to the inside. In the drawing, the storage portion 4 is provided on the opposite side (lower surface) to the surface (upper surface) having the protrusion formed by the arrival portion 5, but projects on the same surface as the protrusion formed by the arrival portion 5. It may be provided.

[0010] The storage section 4 is provided with a space in which the visibility substance 3 can be stored, and the space is almost filled with the visibility substance. Therefore, when an external pressure is applied to the storage unit 4, the storage unit 4 is crushed and deformed, thereby reducing the volume of the internal space,
The visible substance inside the space is caused to flow out to the flow channel 61 in the flow channel unit 6.

Examples of the visible substance 3 include colored fluid substances and the like. Examples of the fluid substance include water, aqueous solution, and other liquids such as organic liquids that do not affect the material of the display member 1. Jelly-like bodies and the like can be mentioned. The fluid substance may have viscosity. The coloring is preferably performed with a color having good visibility, preferably with good visibility from a distance, and more preferably a fluorescent color.

When the display member 1 is not used at the time of fastening, it is preferable to use a material having a certain degree of viscosity as the visibility material so that the visibility material does not inadvertently flow out of the storage section 4. Instead, as shown in FIG.
The partition 7 may be provided between the space of the storage part 4 and the flow path 61. The partition wall 7 is destroyed immediately when the storage section 4 is compressed and deformed and the internal pressure is increased.
For example, it is formed in an extremely thin film shape.

The reaching part 5 is a part that finally receives the visible substance that has been pushed out of the storage part 4 and passed through the flow path 61 of the flow path part 6. The reaching part 5 is similar to the storage part 4,
In a state in which the visibility substance is stored therein, a space substantially corresponding to the volume of the visibility substance is provided, and preferably, the volume of the visibility substance stored therein is provided. Is formed so as to form a space corresponding to That is, in a state where the visibility substance has not flowed into the arrival part 5, it is preferable that the arrival part has almost no space for accommodating the visibility substance. When the material constituting the reaching portion 5 is relatively rich in elasticity, the space may be previously provided before the flow of the visible substance.

The reaching portion 5 needs to be provided at a position where the visible substance flowing into the reaching portion 5 can be visually recognized from the outside of the fastening portion in a securely fastened state. Since it is often fastened via a washer, for example, as shown in FIG. 6, the washer 8 is provided so as to be located over a part or the entire outer periphery of the outer contour of the washer 8. However, the present invention is not limited to such an embodiment. It can be appropriately designed so as to satisfy the above conditions in accordance with the shape of the fastening member and the body to be fastened.

In the present invention, when a predetermined fastening force is applied, the visible substance pushed out of the storage section 4 needs to reach the reaching section 5, but the amount of the substance remaining in the flow path 61 is small. There is no problem. Before the predetermined fastening force is applied, the visible substance must not be accommodated in the arrival part 5, but may be retained in the flow path 61 or the like as long as it is not visible from the outside.

The volume of the visibility substance storage space of the storage unit 4 is:
It is preferable that the volume is larger than the volume of the visibility substance storage space of the reaching part 5 and the flow path 61. That is, in a case where the visibility substance is substantially filled in the storage unit 4, it is preferable that the volume of the visibility substance is larger than the storage space of the reaching part 5 and the volume of the flow path 61. In this way, the visibility substance pushed out from the storage section 4 almost completely fills the reaching section 5.

The entire display member of the present invention can be made of, for example, a conventionally known relatively soft and relatively flexible plastic having transparency, such as polyethylene, polypropylene, or polyvinyl chloride. Also,
If the thickness of the member is reduced, the member becomes relatively flexible, and polyethylene terephthalate or polycarbonate which does not break even when deformed can be used. If it is made of plastic, it can be easily and efficiently produced by conventionally known plastic molding such as injection molding such as two-color molding or blow molding. The visibility substance may be injected into the storage section 4 after molding, or by obtaining a state in which the visibility substance is stored in the storage section 4 by a method described in a specific embodiment described later. The air in the reaching part 5 and the flow path 61 may be evacuated.

After the outer portion of the display member 1 is obtained by molding, air or the like in the storage section 4, the reaching section 5, and the flow path 61 is extracted, and then a method of injecting a visible substance into the storage section 4 is adopted. In this case, it is preferable that the space of the storage unit 4 has as little volume as possible before the injection of the visible substance. That is, as shown in FIG. 7, there is almost no space at first [(a) in the figure], and a space corresponding to the volume (actually, the space is (Although it is full) is formed [(b) in the figure]
It is preferable to do so. In order to do this, as shown in FIG. 8, for example, after the outer portion is once obtained by blow molding, the air inside the portion corresponding to the storage portion 4 space, the flow path 61 and the reaching portion 5 space is released into the hole 10a. From the suction as shown by the arrow in the figure, and then sealing the hole 10a by heat fusion or ultrasonic fusion, or as shown in FIG. 9, applying insert molding or two-color molding, After forming a core portion 9 corresponding to the storage portion 4 space, the flow path 61 and the arrival portion 5 space, and forming an outer shell 10 surrounding the core portion 9 around the core portion 9, the core portion 9 is formed.
For example, a method of melting, melting or decomposing only the substance, taking out a dissolved (decomposed) substance from the hole 10a provided in the outer shell 10 by suction or the like, and then sealing the hole 10a can be adopted. The core 9 may be made of a resin material soluble in a specific organic solvent that does not dissolve the outer shell 10, a resin material that melts at a temperature that does not melt the outer shell 10, or a specific inorganic or organic chemical that does not decompose the outer shell 10. It can be composed of a decomposable inorganic or organic material.

For injecting the visible substance into the space of the storage section 4, a general method for injecting a liquid into a vacuum container or a general method for injecting a beverage or the like into the container can be adopted. After the injection, the injection port is sealed by fusing or welding. Alternatively, after the step of sucking the air inside the portion corresponding to the storage section 4 space, the flow path 61, and the arrival section 5 space, or taking out the decomposed substance, the suction hole 10a (take-out port). Can be used without sealing to inject a visible substance therefrom. Therefore, it is preferable that the above-mentioned suction hole 10 a (extraction port) is provided in the storage section 4.

In the present invention, the visible substance 3 in the storage section 4 reaches the reaching section 5 only when the fastening is securely performed, that is, when the fastening is performed with a required predetermined force. Thus, the relationship between the deformability of the storage part 4, the fluidity of the visibility substance 3, and the deformability of the reaching part 5 is determined. Specifically, for example, if the storage section 4 is configured flexibly, the storage section 4 can be deformed with a small fastening force to push out the internal visible substance. However, if the inside of the reaching portion 5 is filled with air or if it is difficult to deform even if not filled with air, the visible substance is not accepted in the reaching portion 5. Also, in the case where the flow channel 61 of the flow channel portion 6 is too narrow or narrowed by tightening, the outflow of the visible substance is prevented. Therefore, in the case where it is possible to securely connect even with a small tightening force, in order to eliminate the waste of tightening with an excessively strong tightening force, design the material, shape and thickness of each part in consideration of the above. Is preferred.

Contrary to the above, in order to prevent the visible substance from reaching the reaching portion 5 unless the tightening force is large, the storing portion 4 must be made rigid or the inside of the reaching portion 5 must be air. Or a rigid structure without filling with air, or a narrow channel 61 of the channel portion 6, or a combination of any of the above. Can be In the case where secure fastening cannot be performed without a large tightening force, the material, the shape of each part, and the like are designed so that the visible substance does not accidentally reach the reaching portion 5 with a small tightening force. There is a need.

The force required to secure the fastening is determined by experiments. For example, by performing a tightening experiment using a tightening tool that knows the tightening force such as a torque wrench, and knowing the relationship between the tightening force and the quality of the tightened state, it is possible to know the appropriate tightening force to achieve a good tightened state. it can.

As shown in FIG. 10 (a), the display member of the present invention comprises a bolt 1 from both sides of two objects 11 and 12 to be fastened.
3 and the nut 14, a spring washer 15 and a washer 16 are interposed between the nut 14 and the object 11, and the display member 1 is disposed between the washer 16 and the object 11.
And the bolt 13 is screwed into the nut 14 from the opposite side with the two fastened bodies 11 and 12 interposed therebetween. In addition, a method in which a washer or a spring washer is not interposed is used, and FIG. As shown in the figure, when the two members are fastened by directly screwing a screw or a bolt to one of the members, the bolt 13 or the like and the members 11,
The spring 12 and the washer 16 can be interposed as needed between 12, and the like. The number of objects to be fastened may be three or more.

In the present invention, as shown in FIG.
The washer 17 may be fixed to one side surface of the display member 1 to be integrated. The fixation to the washer 17 can be performed by an adhesive or the like. Since the one integrated with the washer does not need to prepare and attach a separate washer at the time of use, there is an advantage that the attachment and fastening work can be simplified.

The display member of the present invention can be used in various fastening parts in addition to the fastening parts in buildings and the like.

[0026]

Next, the present invention will be described in more detail with reference to specific examples. Example 1 Two kinds of aluminum molds were prepared,
Then, the upper member and the lower member of the display member shown by 1a and 1b in the plan center longitudinal sectional view were respectively formed by injection molding. Both of the above members were made of transparent polyvinyl chloride, and the thickness of the members was 0.3 mm. The upper member 1a includes an insertion hole upper portion 2a at the center, a flow path upper portion 6a around the 2a, a reaching portion 5 around the 6a, and an air vent tube upper portion 19a having a hole upper portion 18a at a predetermined portion outside the 5a. Each has. The lower member 1b has an insertion hole lower part 2b, a flow path lower part 6b, a storage part 4, and an air vent pipe lower part 19b having a hole lower part 18b at positions corresponding to the upper member 1a.
In addition, the storage part 4 and the reaching part 5 were made equal in volume.

Next, after the yellow aqueous paint dissolved in a small amount of water is put as the visible substance 3 in the storage section 4 of the lower member 1b, the lower member 1b is put into a freezer to remove the visible substance 3. Frozen. Next, the upper member 1a and the lower member 1b
Were fused with an ultrasonic welder. The intermediate product in this fused state is shown as a perspective view at 20 below FIG.

Next, although not shown, while the visible substance 3 is kept frozen, the air inside the reaching portion 5 is sucked and extracted from the air vent pipe 19, and the root of the air vent pipe 19 is heated and fused. And sealed and then cut at its outer position. After that, the frozen state of the visible substance was released to obtain a display member.

Example 2 A washer having a diameter substantially equal to the diameter of the portion surrounded by the reaching portion was attached and fixed to the upper surface of the display member obtained in Example 1 with an adhesive, and the washer was provided integrally. A display member was obtained.

Example 3 Using the intermediate product 20 of Example 1, as shown in FIG. 13, a washer 17 having a diameter substantially equal to the diameter of a portion of the upper surface of the intermediate product 20 surrounded by the reaching portion is bonded with an adhesive. After being attached and fixed, while the visible substance 3 is kept frozen, the air inside the reaching portion 5 or the like is suctioned and extracted from the air release pipe 19, and then the root of the air release pipe 19 is heated and fused. After sealing, it was cut at its outer position. Thereafter, the frozen state of the visibility material was thawed to obtain a display member integrally provided with a washer. As in the third embodiment, if the washer is integrated before the internal air is evacuated, the intermediate product 20 does not bend or wrinkle during the air bleeding operation, and thus maintains a stable shape. There is an advantage that it can be easily performed.

Test Example 1 Using the washer-integrated display member obtained in Example 3,
A test was performed to confirm the function of the display member. The members to be fastened 11 and 12 described later are 100 mm long × 100 mm wide.
× An iron plate having a thickness of 3 mm with a bolt hole was used.
As shown in FIG. 14, the washer 16, the members to be fastened 12, 11, the integrated washer indicating member 21, the spring washer 15, and the nut 14 were provided in this order on the bolt 13, and the nut 14 was tightened. As a result of observing the under-tightened state from a distance, no yellow color due to the visible substance was observed. Next, when tightening was completed,
The visibility member 3 which was in the storage part 4 before being tightened
However, as the tightening proceeds to a state close to perfection and flows out to the reaching portion 5 as the storage portion 4 is compressed, when the tightening is completed, the inside of the reaching portion 5 is filled, and the reaching portion 5 has a concave shape. Changed to a convex shape. When the thing in the state where the tightening was completed was viewed from a distance, yellow of the visible substance was confirmed.

[0032]

According to the present invention, since the display member for visually confirming the fastening state in the fastening portion of the present invention is constructed as described above, it is determined whether or not the fastening portion is securely fastened at a required pressure. Not only can it be felt, but also can be visually confirmed. Therefore, it is effective in preventing forgetting to fasten. Also, whether or not the fastening portion is securely fastened can be visually recognized from a position away from the fastening portion. Therefore, even when it is necessary to confirm whether or not the fastener is securely fastened, since the investigation can be performed from a position distant from the fastening part, that is, from a distant place, there is an effect that the labor for the investigation can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a display member for visually confirming a fastening state in a fastening portion of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged view of a main part of FIG. 2;

FIG. 4 is a vertical cross-sectional view at the center of a plane showing another embodiment of the storage section.

FIG. 5 is an enlarged longitudinal sectional view of a main part showing still another embodiment of the storage unit.

FIG. 6 is a central longitudinal sectional view of a display member for illustrating an example of a position where a reaching portion is provided.

FIG. 7 is an enlarged longitudinal sectional view of a main part showing a preferred configuration example of a storage unit.

FIG. 8 is an explanatory diagram for describing an example of a method for manufacturing a display member.

FIG. 9 is an explanatory diagram for explaining another example of the method for manufacturing the display member.

FIG. 10 is a diagram illustrating a use mode of a display member.

FIG. 11 is a view showing an example of a display member of the present invention having a washer fixed thereto.

FIG. 12 is a process chart showing an example of a method for manufacturing a display member of the present invention.

FIG. 13 is a diagram showing an example of a method for manufacturing a washer-integrated display member of the present invention.

FIG. 14 is a diagram showing a fastening procedure when a functional test is performed using a specific example.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 Display member for visually confirming fastening state 2 Insertion hole 3 Visible substance 4 Storage section 5 Reaching section 6 Flow path section

Claims (2)

[Claims] In a fastening portion for fastening an object to be fastened by a fastening member, a fastening state used between the fastening members, between the fastening member and the object to be fastened, or between the objects to be fastened. A visibility display member, an insertion hole through which the fastening member can be inserted, and a visibility in which the visibility substance is stored and is configured so that the visibility substance is extruded by being pressed by the fastening of the fastening portion. A substance storage section, a visibility substance reaching section configured to be capable of storing the visibility substance extruded from the visibility substance storage section and configured to allow the stored visibility substance to be visible from the outside, and extruded from the storage section. A display member for visually confirming a fastening state in the fastening portion, comprising: a visibility material flow path portion having a flow path through which the visibility material reaches the reaching portion. 2. A display member for visually confirming a fastening state in a fastening portion, wherein a washer is fixed to the display member for visually confirming a fastening state in the fastening portion according to claim 1.