JPH01322048A - Fiber reinforced resin member - Google Patents

Abstract

PURPOSE:To obtain a resin member with a mounting member integrally formed firmly in the both ends by hooking a fiber material, impregnated with resin, to a hooking part of each mounting member to be wound around while winding back the fiber material in the periphery of a core material and of the fiber material-made mounting member, provided in both ends of this core material, forming an outer cylinder. CONSTITUTION:A fiber material-made mounting member 12, forming a hooking part 14 in the periphery, in provided in one end side of a core material 11 in its axial direction, and a fiber material-made mounting member 13, forming a hooking part 14 in the periphery, is provided in the other end side. A fiber material 16, impregnated with resin, is hooked to the hooking part 14 of each mounting member 12, 13 and wound around while being wound back in the periphery of the core material 11 and of the mounting members 12, 13, and an outer cylinder 15 is formed. In this way, a fiber reinforced resin member 10 can be easily formed integrally providing each mounting member 12, 13 firmly in the outer cylinder 15 in its both ends.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is suitable for use in, for example, scaffolding members for construction work, lattice booms for cranes, FRP toshitruss structures, structures for aerial work, structures for offshore work, etc. The present invention relates to fiber-reinforced resin members, and particularly relates to fiber-reinforced resin members that can be easily formed into a long length by bonding them together on-site.

[Conventional technology]

2. Description of the Related Art Generally, scaffolding work is carried out at construction sites and the like by joining metal pipes together.

However, metal pipes have problems such as being heavy, difficult to transport, and having poor corrosion resistance.

Therefore, it has been proposed in the past to use the fiber-reinforced resin members shown in FIGS. 5 and 6 in place of metal pipes and the like.

That is, in FIG. 5, 1 indicates a fiber reinforced resin member,
The member 1 is formed by winding a filamentous fiber material such as carbon fiber impregnated with epoxy resin into a rod shape, and a threaded portion IA is formed at the axial end thereof by cutting or other means. It is formed.

On the other hand, the one shown in FIG. 6 consists of a rod 2 molded in substantially the same manner as the fiber-reinforced resin member 1, and a screw member 3 made of a metal material, and the screw member 3 is a small-diameter fitting. It consists of a section 3A and a threaded section 3B. A small diameter fitting hole 2A is formed at the axial end of the rod 2,
A fitting portion 3A of the screw member 3 is fitted into the fitting hole 2A and fixed with an adhesive or the like.

[Problem to be solved by the invention]

However, in the prior art shown in FIG. 5, since the threaded portion IA is formed by cutting the end of the fiber reinforced resin member 1, the thread-like fiber material is shortened by cutting the threaded portion IA. As a result of this cutting, the strength of the threaded portion IA is significantly reduced, and there is a disadvantage that delamination is likely to occur from the cut portion of the threaded portion IA, causing early damage to the threaded portion IA.

On the other hand, in the prior art shown in FIG. 6, since the screw member 3 is formed of a metal material, the strength etc. of the screw portion 3B can be improved, but the fitting portion 3A of the screw member 3 is
The threaded member 3 is simply fitted into the fitting hole 2A and fixed with an adhesive, and the adhesive strength is limited, and the threaded member 3 is easily removed from the rod 2.

Therefore, although the prior art shown in FIGS. 5 and 6 can be lightweight, when used as a scaffolding member, etc., the strength of the threaded portion IA and the strength to prevent the threaded member 3 from slipping out are low. However, it has the disadvantage that it is difficult to ensure work safety at construction sites and the like.

The present invention was developed in view of the above-mentioned drawbacks of the prior art, and it is possible to reduce the weight, improve transportability and corrosion resistance, and significantly increase the strength, making it easy to use in field work. To provide a fiber-reinforced resin member that can be assembled and disassembled.

[Means to solve the problem]

In order to solve the above-mentioned problems, the present invention includes a core material, a mounting member provided on one axial end side of the core material and having a hook portion made of a fiber material on the outer circumferential side, and another mounting member having a shape that can be combined with the mounting member and provided on the other axial end side of the core material and having a hook portion of a fiber material formed on the outer peripheral side; and a fiber material impregnated with resin. from the outer peripheral surface of the core material to the outer periphery of the mounting member, and the hook of the mounting member is hooked on the part and wound back, and an outer cylinder formed by winding is adopted. ing.

Here, the fiber materials used include carbon fibers, glass fibers, aramid fibers, alumina fibers, silicon carbide fibers, etc., and the resins impregnated into the fiber materials include epoxy resins having thermosetting and adhesive properties, Polyester resin, polyimide resin, etc. are used. Examples of the method for winding the fiber material include a filament winding method using a thread-like fiber material, a tape winding method using a tape-like fiber material, and a Hunt lay-amp method using a woven fiber material.

[For production]

The fiber material impregnated with resin is hooked onto the hook of each mounting member and then wound back to form an outer cylinder from the outer peripheral surface of the core material to the outer periphery of each mounting member. There is no possibility of the fiber material being cut midway, and the strength of the fiber material can be fully utilized to firmly integrate each attachment member with the core material and the axial end of the outer cylinder. By preparing a plurality of the fiber-reinforced resin members configured in this way and connecting the mounting member with the other mounting members, it is possible to easily assemble or disassemble the fiber-reinforced resin member into a long piece during field work. can do.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 4.

1 to 3 show a first embodiment of the invention.

In the figure, reference numeral 10 indicates a fiber-reinforced resin member, and reference numeral 11 indicates a core material formed in a cylindrical shape from a fiber-reinforced resin material.The core material 11 is a thread-like fiber material impregnated with resin, similar to the outer cylinder 15 described later. One or more layers are cross-wound using means such as filament winding at a certain winding angle, for example, around 5 to 30 degrees, which is close to zero degrees with respect to the central axis O-0, until a predetermined thickness is achieved. It is formed into a cylindrical shape with a predetermined length by the wound layers. Since the core material 11 is formed by winding the fiber material with a winding angle close to zero degrees with respect to the central axis 0-0, the bending strength, tensile strength, etc. can be increased.

12.13 indicates one mounting member and another mounting member that are fitted and fixed to both ends of the core material 11 in the axial direction, and the mounting member 1
2.13 is formed of a metal material, a ceramic material, a resin material reinforced with short fibers, etc., each having a predetermined shape. Here, the mounting member 12 is formed in the shape of a short cylinder with a lid, and a large diameter part 12A and a small diameter male thread part 12B protruding in the axial direction are formed on the lid side, and a large diameter part 12B is formed on the cylinder side. An annular stepped portion 12G having a smaller diameter than the portion 12A and a small diameter fitting portion 12D having an outer diameter corresponding to the inner diameter of the core material 11 are formed between the annular stepped portion 12C and the large diameter portion 12. A small-diameter annular recess 12E is formed.

The mounting member 13 is formed into a short stepped cylinder shape, and has a large diameter portion 13A having an outer diameter corresponding to the large diameter portion 12A of the mounting member 12, and an annular recess 13B corresponding to the annular recess 12B. , an annular step portion 13C corresponding to the annular step portion 12C, and a fitting portion 13D corresponding to the fitting portion 12D are arranged in the axial direction, and the inner periphery of the large diameter portion 13A, the annular recess 13B, etc. A female threaded portion 12B that can be screwed into the male threaded portion 12B of the mounting member 12 is formed on the side. Further, the annular step portions 12C and 13C of the mounting member 12.13 are provided with a plurality of pin holes 12F at predetermined intervals in the circumferential direction.

12F, . . . , 13F, 13F, . . . are formed at a predetermined depth.
The hole diameter is approximately +am.

14.14. ... is each pin hole 1 of mounting member 12.13
The annular stepped portions 12C and 1 are planted on the 2F and 13F, respectively.
3C, each pin 14 is formed into a small-diameter cylindrical shape from a unidirectionally drawn fiber-reinforced resin material or a high-strength material made of a metal material, etc., and its base end is It is fixed in each pin hole 12F, 13F using means such as press fitting or adhesive. The protruding portion of each pin 14 constitutes a hook for a fiber material 16, which will be described later, and when the outer cylinder 15 is formed, the periphery is completely filled with the fiber material 16, and the mounting member is attached from the outer peripheral surface of the pin 11. 12. The outer cylinder 15 is formed by winding the fiber material 16 around the outer periphery of the core material 11 etc. using means such as filament winding method to form a constant winding angle θ. It is formed into a cylindrical shape by cross-wrapping it while applying tension until it reaches a predetermined thickness. The fiber material 16 is sometimes wound around the mounting members 12, 14 in such a way that it is hooked onto each pin 14 at both ends in the axial direction of the core material 11, as illustrated in FIG.
While winding around the annular recesses 12E and 13B of the other pins 14
The core material 11 is hooked onto the core material 11 and wound again toward the outer circumferential side of the core material 11.

As a result, the mounting members 12.1 are attached to both ends of the outer cylinder 15.
The rewinding portions 15A, 15A located on the outer peripheral side of the annular recesses 12B, 13B of No. 3 are the large diameter portions 12A.

The mounting member 12 is formed with an outer diameter corresponding to 13A.
．． 13 are firmly integrated into both ends of the core material 11 and the outer cylinder 15. Here, carbon fiber, glass fiber, aramid fiber, alumina fiber, silicon carbide fiber, etc. are used for the fiber material 16, and the resin to be impregnated into the fiber material 16 includes epoxy resin having thermosetting and adhesive properties, Polyester resin, polyimide resin, etc. are used. Furthermore, the same material as the outer tube 15 is used as the material for the core material 11.

The fiber-reinforced resin member 10 according to this embodiment has the above-described configuration, and a method for manufacturing the same will be described next.

First, in order to form the core material 11, a material (not shown) is prepared in a mold such as a mandrel whose outer peripheral surface has been finished with a predetermined surface accuracy. A cylindrical core material 11 is formed by cross-winding a thread-like fiber material impregnated with the above winding angle to a predetermined thickness using a filament winding method at a certain winding angle of, for example, about 5 to 30 degrees. The bending strength, tensile strength, etc. of the core material 11 are increased by making it as small as possible.

Next, the fitting parts 12D, 13 of the mounting members 12.13 are attached to the inner periphery of both ends of the core material 11 formed to a predetermined length in this way.
Fit D and secure them both with adhesive. In this case, each pin 14 may be fixed in advance to each pin hole 12F, 13F of the mounting portions U'12, 13 by press-fitting or adhesive, or the mounting members 12, 13 may be attached later. Each pin 14 may be fixed to each pin hole 12F, 13F.

Then, when the adhesive is completely cured, the thread-like fiber material 16 impregnated with resin is wound at a fixed angle by the filament winding method from the outer circumferential surface of the core circumference to the outer circumferential side of the mounting member 12.13. Cross winding is performed at θ to form an outer cylinder 15 consisting of a plurality of wound layers having a predetermined thickness. At this time, the fiber material 16 is attached to the mounting member 1 at both ends of the core material 11.
2.13, and is wound around the annular recesses 12E and 13B while applying a predetermined tension, and is hooked onto each of the other pins 14.
4 and is wound back to the outer circumferential side of the core material 11, thereby forming each wound portion 15A on both ends of the outer cylinder 15,
The mounting members 12, 13 are firmly integrated. Further, the winding angle θ may be appropriately selected according to the usage pattern of the fiber reinforced resin member 10, and when tensile strength is mainly required, the winding angle θ may be selected with respect to the central axis O-0. Close to zero, e.g. 5
-30 degrees, and when torsional strength is required, the winding angle θ is close to 45 degrees with respect to the central axis ○-0, for example, about 30 to 60 degrees.

Next, when the outer cylinder 15 has been formed, they are put into a curing furnace (not shown), and the resin impregnated into the fiber material 16 is thermally hardened to form the fiber reinforced resin member 10 to a predetermined length. Complete with dimension β.

Thus, according to this embodiment, the mounting members 12 and 13 can be firmly integrated on both ends of the core material 11 and the outer cylinder 15 by fully utilizing the strength of the fiber material 16, and can be removed reliably. It is possible to obtain a lightweight fiber-reinforced resin member 10 that can be stopped and rotated, and has high fatigue resistance, corrosion resistance, and the like. In this case, the length l of the fiber-reinforced resin member 10 is the same as the length of the core material 11 (=J part iJ'12, 13). 12.1
A predetermined dimension can be easily secured as the dimension between the large diameter portions 12A and 13A of No. 3.

Then, the fiber reinforced resin member 1 formed as described above
0 is prepared, and the mounting members 12 and 13 of each member 10 are screwed together by the male threaded portion 12B and the female threaded portion 13E as shown in FIG. 3 during field work etc.
Its total length can be easily adjusted by appropriately disassembling and assembling it, and it can be optimally used as a scaffolding member at construction sites, etc. It can improve transportability by reducing its weight, and its tensile strength and torsional strength can be increased as appropriate depending on the application.

In addition, when the intended use is completed, it can be disassembled appropriately and transported to the next site, and it can be reused.
The length l can be arbitrarily selected at the time of manufacturing. Furthermore, by appropriately changing the outer diameter of the fiber-reinforced resin member 10, when the respective members IO are combined to form a long rond, etc., this rond can be easily made into a stepped shape. This makes it possible to suitably accommodate complex-shaped rondos and the like.

Next, FIG. 4 shows a second embodiment of the present invention, and the feature of this embodiment is that the fiber-reinforced resin member 20 is formed into a cylindrical shape. Here, the member 20 includes a core material 21, mounting members 22 and 23, and each pin 2, almost the same as the member 10 according to the previous embodiment.
4 and an outer cylinder 25, the mounting member 2
2 and 23 are both formed in the shape of a short stepped cylinder. The mounting members 22 and 23 have large diameter portions 22A and 23A, annular recesses 22B and 23B, annular stepped portions 22C and 23C, and fitting portions 22D and 23D. However, the female part 22 is attached to the mounting member 23.
A male threaded portion 23E is formed which can be screwed into the threaded portion 23E. In addition, each pin hole 22F, 23F is provided in the annular stepped portion 22C923C.
is formed with a hole diameter of, for example, about 2 to 4 mm, and wound portions 25A, 25A are formed at both ends of the outer cylinder 25.

Thus, even in this embodiment configured in this way, by preparing a plurality of fiber-reinforced resin members 20,
They can be combined as appropriate during on-site work, and substantially the same effects as in the first embodiment can be obtained.

In addition, in each of the above embodiments, the mounting members 12, 13 (22,
23), threaded portions 12 to (23E), female threaded portion 13E (
22B) and by screwing them together, a plurality of fiber reinforced resin members 10 (20) are connected to each other.
The members 10 (20) do not necessarily have to be male threaded or threaded; for example, the respective members 10 (20) may be connected to each other using means such as press-fitting.

Further, in each of the above embodiments, the core material 11 (21) and the outer cylinder 15 (25) are formed using a method such as a filament winding method, but instead of this,
These may be formed using a tape winding method, a hand lay-up method, or the like, and the core material 11 (21) may be formed from a unidirectionally drawn material made of a fiber-reinforced resin material.

Furthermore, in each of the above embodiments, the fiber reinforced resin member 10 (2
0) was described as being used as a scaffolding member for construction sites, etc., but instead of this, it can be used as a lattice boom for cranes,
It can also be suitably used for RP truss structures, structures for space work, structures for offshore work, etc., and can greatly improve transportability, ease of assembly and disassembly in field work, etc.

Further, in each of the above embodiments, the mounting members 12, 13 (22,
Although it has been described that the hook forms a part by planting each pin 14 (24) in 23), instead of this,
The hook portion may be integrally formed with the mounting member 12, 13 (22, 23).

〔Effect of the invention〕

As detailed above, according to the present invention, one attachment member and another attachment member provided on both ends of the core material are formed so as to be able to be connected to each other, and the outer peripheral side of the attachment member is made of fiber material. The hook is provided with a section, and the fiber material forming the outer cylinder is hooked onto the hook and reeled back, so each mounting member can be firmly integrated with both ends of the outer tube, and multiple By preparing these components, it is possible to combine them with each other during on-site work to form high-strength, long rondos and columns as appropriate, and to greatly improve transportability and ease of disassembly and assembly. play.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a half-sectional view of a fiber-reinforced resin member, and FIG. 2 is an external appearance of the core material and mounting member showing the outer cylinder being formed. 3 is an external view showing a state in which a plurality of members shown in FIG. 1 are combined, FIG. 4 is a half-sectional view of a fiber reinforced resin member showing the second embodiment, and FIG. External view of the fiber-reinforced resin member shown, No. 6
The figure is a longitudinal sectional view of a main part of a fiber-reinforced resin member showing another conventional technique. 10.20...Fiber reinforced resin member, 11.21...
Core material, 12, 13, 22.23...Mounting member, 12B
, 23B...Male thread portion, 12D, 13D, 22D. 23D...Mating part, 12F, 13F, 22F, 23F
...Pin hole, 13E, 22E...Female part, 14.
24...pin, 15.25...outer cylinder, 16...fiber material. kuOc1'1

Claims (1)

[Claims] a core material, a mounting member provided on one end of the core material in the axial direction and having a hook portion of a fiber material formed on the outer circumferential side; Another mounting member is provided at the other end in the axial direction of the core material and has a hook portion of the fiber material formed on the outer peripheral side, and a fiber material impregnated with resin is attached to each of the mounting members from the outer peripheral surface of the core material. A fiber-reinforced resin member comprising: an outer tube formed by hooking onto hook portions of each attachment member and winding the outer tube around the outer circumference of the attachment member.