JPH09295351A - Profile thickness non-uniform frp pipe and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily obtain a non-uniform thickness FRP pipe having a profile cross section by forming a profile cross section wherein a circular arc part and a flat part thermally cured from a glass fiber cloth prepreg continue and making the flat part thicker than the circular arc part to form the surface thereof as a slip surface while molding the surface of the circular arc part as a non-slip surface. SOLUTION: A mandrel M is rotated to wind a first glass fiber cloth prepreg 13 around the surface having a taper shape of the mandrel M several times and several second glass fiber cloth prepregs 14 and a mold release plate 15 are successively laminated to the surface corresponding to the flat part 10b of the mandrel M. Subsequently, a bleeder tape is wound around the whole in a covering state to integrally cure the first and second glass fiber cloth prepregs 13, 14. Then, the mandrel M is extracted and the bleeder tape is peeled off. By this constitution, the flat part is made thick and the surface thereof is made smooth as a slip surface and the surface of the circular arc part is roughened as a non-slip surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an irregularly shaped FRP tube useful for collecting sticks of kelp and handrails of stairs, and a method for producing the same.

[0002]

2. Description of the Related Art FRP tubes conventionally used for fishing rods, golf shafts, bicycle structural members, and the like include:
Japanese Patent Application Laid-Open Nos. 5-137480 and 5-104646 propose a manufacturing method for partially increasing the wall thickness in the longitudinal direction. Is also known as JP-A-5-64849.

However, each of the above FRP pipes has a circular cross-section with a constant thickness, and means a partially uneven pipe in the longitudinal direction thereof. It is not an FRP tube having a deformed cross section having a flat portion which becomes a rubbing surface. Further, a method of manufacturing such an uneven thickness FRP tube having a modified cross section so as to satisfy the condition has not yet been proposed.

[0004]

SUMMARY OF THE INVENTION In view of the above situation, the present invention has an irregularly shaped FR whose cross section is useful in, for example, a collecting rod for kelp or a handrail on a staircase, and whose thickness is uneven in the diameter direction.
It aims to provide a P tube and a production method which is rich in mass productivity.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, according to the present invention, an irregularly shaped FRP tube is formed in such a manner that an arc portion and a flat portion which are heat-cured from a glass fiber cloth prepreg are continuous. A cross section, wherein the flat portion is made thicker than the arc portion and the surface is formed into a slip surface, while the surface of the arc portion is formed into a non-slip surface,

[0006] In addition, as a method of manufacturing the above irregularly shaped FRP pipe, a first glass fiber cloth prepreg in which a thermosetting resin is first impregnated on the surface of a mandrel having an irregular cross section in which an arc portion and a flat portion are continuous. Then, a second glass fiber cloth prepreg of the same quality and a release plate of a heat-resistant resin are successively laminated on the surface corresponding to the flat portion wound, and then a bleeder tape is applied to the whole. By wrapping and heating,
The first and second glass fiber cloth prepregs are integrally cured, then pulled out from the mandrel, and the bleeder tape and the release plate are sequentially peeled off, and the surface of the arc portion corresponding to the arc portion of the mandrel is removed. The non-slip surface is generated as a result of the bleeding tape of the bleeder tape. On the other hand, the surface of the flat portion corresponding to the flat portion of the mandrel is generated as a slip surface by laminating a smooth release plate. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the drawings. FIGS. 1 to 5 show a mandrel (M) used for manufacturing a deformed uneven thickness FRP pipe suitable for a fishing rod of kelp, and FIG. To 18 respectively show the manufacturing steps.

The mandrel (M) is a circular bar material in the form of a taper made of a metal such as aluminum.
And the flat portion (10b) are formed in a D-shaped cross section that is larger than a continuous semicircle, and the thickness gradually changes in the longitudinal direction.

The length (L) of the mandrel (M) is, for example, about 10,300 mm, and the thickness (D) at one end thereof is large.
1) is about 100 mm, and the thickness (D
2) are each dimensioned as about 36 mm. However,
While maintaining the above D-shaped cross-sectional shape on the thick end side,
For example, a straight portion (10c) is left for about 300 mm.

[0010] (11) and (12) are a pair of journals which are located on the longitudinal center line of the round bar material and continuously project integrally from both ends of the mandrel (M). It will be used for rotation.

That is, in manufacturing the deformed uneven thickness FRP tube according to the present invention, first, the mandrel (M) is rotated to bring the tapered surface into contact with the surface shown in FIGS.
The first glass fiber cloth prepreg (13) impregnated with a thermosetting resin such as an epoxy resin or a phenol resin is wound several times.

Next, the surface of the wound first glass fiber cloth prepreg (13) corresponding to the flat portion (10b) of the mandrel (M) is impregnated with a second thermosetting resin of the same quality. Several glass fiber cloth prepregs (14) and a release plate (15) made of an FRP plate or a Teflon plate having a smooth surface coated with a release agent, or another heat-resistant resin,
The layers are sequentially stacked as shown in FIGS.

Then, a bleeder tape (16) made of polyester fiber or the like having a release property and heat resistance as a whole is
Then, wrap it in a covering state as shown in FIGS.
The first and second glass fiber cloth prepregs (13) and (14) are integrally cured by inserting them into a heating furnace at about 130 to 150 ° C and heating them for a required time.

Thereafter, the so-called semi-finished product (A) in the cured state is taken out of the heating furnace, and the semi-finished product (A)
From the mandrel (M) as shown in FIG. Finally, as is clear from FIGS. 14 to 16, the bleeder tape (16) and the release plate (15) are sequentially peeled off from the semi-finished product (A).

In this case, as shown in FIGS. 17 and 18, the cross-sectionally shaped FRP pipe (P) having a sectional shape corresponding to the mandrel (M) is manufactured and completed. Flat portion (17b) corresponding to flat portion (10b) of mandrel (M)
However, the thickness is increased by the number of laminated plies of the second glass fiber cloth prepreg (14).

In addition, between the surface of the flat portion (17b) of the irregularly-thickened FRP pipe (P) and the bleeder tape (16) wound around the flat portion (17b), the smooth release plate ( Because of the interposition of 15), the surface of the flat portion (17b) is generated as a slip surface in a smooth state.

On the other hand, the surface of the arc portion (17a) corresponding to the arc portion (10a) of the mandrel (M) in the FRP pipe (P) is also interposed through the release plate (15). No, bleeder tape (1
Due to the fact that 6) was directly wound, the surface of the arc portion (17a) is roughened as a non-slip surface due to the trace of winding of the bleeder tape (16).

Since the release plate (15) has a literal releasability, it can be reused any number of times after the release. The thickness (T1) of the circular arc portion (17a) in the irregularly shaped FRP pipe (P) depends on the number of ply wraps of the first glass fiber cloth prepreg (13). The thickness (T2) of the flat portion (17b) can be varied depending on the number of plies of the second glass fiber cloth prepreg (14) laminated on the first glass fiber cloth prepreg (13).

Incidentally, the irregular thickness F used for the collecting rod of kelp F
As the RP pipe (P), the thickness (T1) of the arc portion (17a) is reduced to about 2.5 mm by 10 plies of the first glass fiber cloth prepreg (13), and the flat portion (1) is formed.
The thickness (T2) of 7b) is about 3.5 by four plies of the second glass fiber cloth prepreg (14) laminated on 10 plies of the first glass fiber cloth prepreg (13).
It is preferable to dimension each to mm.

Further, the first glass fiber cloth prepreg (13) may be made white, for example, and the second glass fiber cloth prepreg (14) may be made green or the like. According to this, a two-tone colorization of the arc portion (17a) and the flat portion (17b) in the deformed uneven thickness FRP pipe (P) is achieved, which is useful for a discriminating effect and a decorative effect in use.

First, the length (L) of about 10,300 mm
Although the description has been made on the whole real mandrel (M) provided with the above, the product-the deformed uneven thickness FRP pipe (P) is made even longer in relation to the application, or the length of the FRP pipe (P) is changed. In the case where it is necessary to make the mandrel (M) in a fixed unit of, for example, about 3,300 mm, as suggested from the modified embodiments of FIGS. 19 to 27 corresponding to FIGS. Several pieces (M1) (M2) (M
3) (3 in total in the illustrated example), and using each of the mandrel pieces (M1) (M2) (M3), the deformed uneven thickness FRP pipe (P1) molded through the same manufacturing process as above.
(P2) As shown in FIGS. 28 to 31 from several pieces of (P3), a circular arc portion (17a) and a flat portion (17b) between adjacent ones are formed in a D-shaped cross section in which the same portions are continuously continuous. The joints (18) and (19) having the corresponding cross-sectional shape and thickness may be connected and unified into a replenished state. (20) is the joint (18) (1)
9) Both ends of the irregular shaped uneven FRP pipe (P1)
The caulking pins for fixing (P2) and (P3) are preferably inserted with an adhesive for fixing.

In any case, the irregularly-shaped uneven thickness FRP pipe (P) produced as described above is, for example, a kelp sampling rod (21).
Can be used effectively as That is, the FRP
To the arc (17a) at the thick end of the pipe (P),
As shown in FIGS. 32 and 33, the hook metal fittings (2
2) Connect the circular mounting plate (23) with the screw fastener (24).
The FRP pipe (P) is fixed and integrated by both ends, and both ends of the FRP pipe (P) are plugged with end caps (not shown), and the hollow inside is also filled with weights (not shown) to complete the kelp sampling rod (21). is there.

In this case, buoyancy may be generated by filling the hollow interior of the FRP pipe (P) with a foam material. Further, it is preferable that the weight is determined so that it can be freely adjusted in and out according to each worker. It is also conceivable to use the weight as an end cap.

In the kelp sampling operation, as suggested from FIG. 34, when the fisherman (25) is in a posture of holding the fishing rod (21) on the small fishing boat (26), the fishing boat (26)
While holding and pushing, pulling, and further turning the collecting rod (21) applied to the edge (27) of the bellows, attach the kelp to the hook (22) at the lower end thereof. It is customary to entangle and take in the fishing boat (26).

Therefore, according to the kelp sampling rod (21) finished from the deformed uneven thickness FRP pipe (P), even if the arc portion (17a) forms a non-slip surface, even if it is wet by the kelp slime. , Without the risk of worker slipping,
Since the shoulder is not hurt by the arc portion (17a),
It is useful for long hours of light work, and there is no need to wear extra shoulder pads or protectors.

On the other hand, a FRP pipe (P) having a D-shaped cross section and having a flat portion (17b) is used as the collecting rod (21).
Therefore, even though the hook (22) at the lower end is submerged in the sea, its bending direction can be easily and correctly recognized from the fishing boat (26), and the kelp is securely entangled. Therefore, there is no danger of rolling around such as falling off from the hook fitting (22), so that the stapling work can be performed stably. Even during storage in the swaying fishing boat (26), it can be stably stood without fear of rolling.

Since the flat portion (17b) is thicker than the arc portion (17a), the fishing boat (2)
The edge (27) of the fishing boat (26) may be rubbed against the edge (27) of the fishing boat (26) because the durability can be enhanced and the slip surface is smoothed. There is no.

In particular, if the coloring colors of the arc portion (17a) and the flat portion (17b) are made different, not only can the collection rod (21) be given a two-tone decoration effect, but also the degree of wear can be reduced. There is also an advantage that can be known by exposure, and it is a guide for replacement.

In the irregular-shaped FRP pipe (P) to be finished into the collecting rod (21) of the kelp, the cross-sectional shape is D-shaped, and the thickness corresponds to the mandrel (M), and the length is in the longitudinal direction. Although it is created in a gradually changing tapered form,
Depending on the use of the FRP pipe (P), the FRP pipe (P) may be formed into a substantially O-shape as shown in FIG. 35 provided with a pair of thick and smooth flat portions (17b) facing each other, or another irregular cross section. Also, by stabilizing the thickness of the FRP pipe (P), for example, a handrail (2
It is also possible to use as 8).

In this case, the thickened and smoothed flat portion (17b) can be used as a stable and firm mounting surface with the handrail receiving bracket (29). (30)
Is a screw fastener for fixing the handrail (28) and the receiving bracket (29), and (31) is an end cap at both ends.

Also, unlike a handrail made of extruded material,
The surface of the arc portion (17a) can be finished to a special non-slip surface, and in combination with the two-tone color, the decorative effect of a building rich in interest can be provided.

[0032]

As described above, the deformed uneven thickness FRP of the present invention
Tube (P) is glass fiber cloth prepreg (13) (1
4) The heat-cured arc portion (17a) and the flat portion (17b) have a continuous cross section, and the flat portion (17b) is made thicker than the arc portion (17a) and its surface is slipped. Surface, while the surface of the arc portion (17a) is formed as a non-slip surface.
It can be said that it is remarkably effective when used for 1) and handrails for stairs (28).

In addition, as a method of manufacturing the same, the surface of the mandrel (M) having an irregular cross-section in which the arc portion (10a) and the flat portion (10b) are continuous is firstly thermoset. A first glass fiber cloth prepreg (13) impregnated with a resin is wound thereon, and a second glass fiber cloth prepreg (14) of the same quality is continuously formed on the surface corresponding to the wound flat portion (10b).
And a release plate (15) made of a heat-resistant resin are sequentially laminated, and then a bleeder tape (16) is wrapped around the whole and heated, so that the first and second glass fiber cloth prepregs (13) are heated. (14) is cured together,

Next, the mandrel (M) is pulled out, the bleeder tape (16) and the release plate (15) are sequentially peeled off, and an arc portion corresponding to the arc portion (10a) of the mandrel (M). (17a)
While the surface of the flat part is formed as a non-slip surface by the winding mark of the bleeder tape (16), the flat part (17b) of the flat part (17b) corresponding to the flat part (10b) of the mandrel (M) also has a smooth release plate ( 1
5) Since it is designed to be generated as a slip surface by lamination, the intended uneven thickness FRP pipe (P)
Can be produced very efficiently.

[Brief description of drawings]

FIG. 1 is a perspective view of a mandrel used for manufacturing a deformed uneven thickness FRP pipe according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view of FIG.

4 is an enlarged cross-sectional view taken along line 4-4 of FIG.

FIG. 5 is an enlarged sectional view taken along line 5-5 in FIG. 3;

FIG. 6 is a perspective view showing a process of winding a first glass fiber cloth prepreg on a mandrel.

FIG. 7 is a perspective view showing a state in which winding is completed.

FIG. 8 is a perspective view showing a lamination process of a second glass fiber cloth prepreg and a release plate.

FIG. 9 is a perspective view showing a stacking completed state in the same manner.

FIG. 10 is an enlarged sectional view taken along line 10-10 of FIG. 9;

FIG. 11 is a perspective view showing a process of winding a bleeder tape.

FIG. 12 is a perspective view showing a state where the winding is completed.

FIG. 13 is a perspective view showing a state in which a semi-finished product is extracted from a mandrel.

FIG. 14 is a perspective view of a process of peeling a bleeder tape from a semi-finished product.

FIG. 15 is a perspective view showing the same stripping completed state.

FIG. 16 is a perspective view of a process of peeling a release plate from a semifinished product.

FIG. 17 is a perspective view showing a product completed as an irregular thickness FRP tube.

FIG. 18 is an enlarged sectional view taken along line 18-18 of FIG.

FIG. 19 is a side view showing a first mandrel piece divided into a fixed unit length.

FIG. 20 is an enlarged sectional view taken along line 20-20 in FIG.

FIG. 21 is an enlarged sectional view taken along line 21-21 of FIG.

FIG. 22 is a side view showing the divided second mandrel piece.

FIG. 23 is an enlarged sectional view taken along line 23-23 of FIG.

FIG. 24 is an enlarged sectional view taken along line 24-24 in FIG.

FIG. 25 is a side view showing the divided third mandrel piece.

FIG. 26 is an enlarged sectional view taken along line 26-26 of FIG.

FIG. 27 is an enlarged sectional view taken along line 27-27 of FIG.

FIG. 28 is a perspective view showing several pieces of a deformed uneven thickness FRP pipe and a joint thereof.

FIG. 29 is a perspective view showing a process of adding and connecting the deformed uneven thickness FRP pipe composed of several pieces.

FIG. 30 is a perspective view showing a connected state in which the same is added.

FIG. 31 is an enlarged sectional view taken along line 31-31 of FIG. 30;

FIG. 32 is a perspective view showing a collecting rod for kelp finished from a deformed uneven thickness FRP tube.

33 is an enlarged sectional view taken along the line 33-33 in FIG. 32.

FIG. 34 is an explanatory diagram showing a kelp sampling operation using the sampling rod.

FIG. 35 is a cross-sectional view corresponding to FIG. 18 and showing a different cross-sectional shape of the deformed uneven thickness FRP pipe.

FIG. 36 is a side view showing a use state of a handrail for stairs finished from a deformed uneven thickness FRP pipe.

37 is an enlarged sectional view taken along the line 37-37 in FIG.

[Explanation of symbols]

 (10a) ・ Arc part (10b) ・ Flat part (13) ・ First glass fiber cloth prepreg (14) ・ Second glass fiber cloth prepreg (15) ・ Plate for release (16) ・ Bleeder tape (17a) ・Arc part (17b), Flat part (M), Mandrel

Claims (6)

[Claims] A glass fiber cloth prepreg (13) (1)
4) The heat-cured arc portion (17a) and the flat portion (17b) have a continuous cross section, and the flat portion (17b) is thicker than the arc portion (17a) and its surface is slipped. A deformed uneven thickness FRP pipe characterized in that the arc-shaped portion (17a) is formed into a non-slip surface while being formed into a non-slip surface. 2. An arc portion (17a) and a flat portion (17).
2. The uneven thickness FRP tube according to claim 1, wherein a different colored color is given to b). 3. An arc portion (17a) and a flat portion (17).
2. The deformed uneven thickness FRP pipe according to claim 1, wherein the thickness of the deformed cross section continuous with b) is gradually changed in the longitudinal direction. 4. An arc portion (10a) and a flat portion (10).
b) First, a first glass fiber cloth prepreg (13) impregnated with a thermosetting resin is wound on the surface of a mandrel (M) having an irregular cross section continuous with (b), and the flat portion (10b) wound around the first glass fiber cloth prepreg (13). And a second glass fiber cloth prepreg (14) of the same quality and a release plate (1) of a heat-resistant resin.
5) are sequentially laminated, and then the first and second glass fiber cloth prepregs (13) and (14) are integrally cured by winding and heating a bleeder tape (16) over the entirety. The bleeder tape (16) and the release plate (15) are sequentially peeled off from the mandrel (M), and the arc portion (10) of the mandrel (M) is removed.
The surface of the circular arc portion (17a) corresponding to (a) is generated as a non-slip surface by the trace of winding of the bleeder tape (16), while the flat portion (17) corresponding to the flat portion (10b) of the mandrel (M) is also formed.
A method for producing a deformed uneven thickness FRP tube, wherein the surface of (b) is formed as a slip surface by laminating a smooth release plate (15). 5. A first and second glass fiber cloth prepreg (1.
(3) The method for manufacturing an irregularly-thickness FRP pipe according to claim 4, wherein different coloring colors are applied to (14). 6. An arc portion (10a) and a flat portion (10).
5. The method according to claim 4, wherein the thickness of the mandrel (M) having the irregular cross section continuous with (b) is gradually changed in the longitudinal direction.