JP2003300256A - Frp spring and manufacturing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coil spring made of a fiber reinforced plastic subjected to braiding treatment using a braider, and a manufacturing method therefor. <P>SOLUTION: Braided yarns of which the braiding angle is ±θ° with respect to an axial line and central yarns of which the angle is 0° with respect to the axial line are selectively combined to compose a braided layer and a plurality of the braided layers are laminated to manufacture a braid structure being an FRP structure. The manufacturing method for an FRP spring comprises a braiding process 11 for setting reinforcing fibers preliminarily impregnated with a resin to a braider BR and weaving the braid structure 10 by braiding, a lapping process for continuously winding a heat-shrinkable tape 13 around the braid structure while weaving the braid structure and a coil molding process for spirally winding the lapped braid structure 14 and curing the wound braid structure to mold the same into a coil-like spring structure. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tissue body made of fiber reinforced plastics (hereinafter, referred to as FRP), which is braided by using a braider device, and more particularly to a FRP spring, Moreover, the present invention relates to a method for manufacturing the FRP spring.

[0002]

2. Description of the Related Art As is well known, the FRP material is a composite material obtained by molding fiber materials such as glass fiber and carbon fiber in a matrix of various plastics, and is lightweight, has high strength, and has an elastic modulus. Has the characteristic of high. Furthermore, this FRP material has high fatigue strength, excellent vibration damping properties, and high electrical insulation properties. Furthermore, this FRP material has various characteristics such as good chemical resistance and good corrosion resistance. Taking advantage of this characteristic, there is a great possibility that it will be used in aerospace, vehicles, chemicals, and other general industrial fields, and it can be said that it is an extremely effective material as an FRP composition structural material for them.

The present invention is an FR having the characteristics described above.
The P material is intended to form coiled helical springs, which are mechanical structural members. In the present invention, the coiled spring is a compression coiled spring.
s), extension coiled spring
s), including torsion coiled springs, and further, those including different shapes such as a cylindrical shape, a conical shape, or a spiral shape.

Conventionally, resin coil springs are molded by a method such as a silicon tube. It has been pointed out that this is a problem such as resin flow during molding and curing, and Vf (resin content rate) does not rise.

[0005]

Therefore, in the present invention, when the FRP spring manufactured by the braiding process using the braider device is manufactured, the braiding angle of the braiding yarn in the braiding process is changed,
An object of the present invention is to provide a method for manufacturing an FRP spring that enables designing coil springs having different spring constants, and an FRP spring obtained by the manufacturing method.

[0006]

In order to achieve the above-mentioned object, the present invention specifically provides a braiding yarn having a braid angle of ± θ ° with respect to an axis and a central yarn having an angle of 0 ° with respect to an axis. A method for producing an FRP tissue body comprising a braid layer selectively combined to form a braid layer, and a plurality of the braid layers being laminated to form a braided braid body, wherein reinforcing fibers impregnated with resin in advance are set in a braider device. Then, a braiding step of weaving a braided braided body by braiding, a wrapping step of continuously winding a heat-shrinkable tape around the braided braided body while weaving the braided braided body, and a wrapped braided braided body. FR comprising a coil forming step of winding in a spiral shape and hardening to form a coil spring structure
It constitutes a method of manufacturing a P spring.

Further, in the invention, in the braiding step, the braiding angle of the braiding yarn is changed by ± θ °,
The present invention constitutes a method for manufacturing an FRP spring that manufactures an FRP spring having different spring constants according to different set angles.

Further, according to the present invention, during the braiding step, a braided fabric body is woven while changing the braid angle ± θ ° of the braided yarn, and the springs differ in the winding length direction of the spring depending on the braided fabric body. The present invention constitutes a method for manufacturing an FRP spring in which a constant portion is integrally formed.

Furthermore, according to the present invention, a braid layer having a braid angle of ± θ ° with respect to an axis and a central yarn having an angle of 0 ° with respect to an axis are selectively combined to form a braid layer, and the braid layer is constructed. A FRP spring formed by laminating a plurality of layers to form a braided braided body, and spirally winding the braided braided body,
The factor that defines the spring constant of the FRP spring is one that depends on the value of the braiding angle ± θ ° of the braiding thread.
It constitutes a spring.

Furthermore, according to the present invention, there is provided an FRP spring which integrally has continuously different spring constant portions in the winding length direction of the spring according to the value of the braiding angle ± θ °. It is what constitutes.

Furthermore, the present invention constitutes an FRP spring in which the winding diameter of the FRP spring has the same diameter from one end to the other end in the winding length direction of the spring.

Furthermore, the present invention constitutes an FRP spring having a diameter portion in which the winding diameter of the FRP spring differs from one end to the other end in the winding length direction of the spring.

Furthermore, the present invention also constitutes an FRP spring having a diameter portion of the FRP wire rod forming the FRP spring, the diameter portion of which varies from one end to the other end in the winding length direction of the spring. .

Furthermore, in the present invention, the braid structure for the FRP spring is a solid braid structure.
It constitutes an RP spring.

Furthermore, in the present invention, the braid structure for the FRP spring is a hollow braid structure.
It constitutes an RP spring.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An FRP spring according to the present invention and a method for manufacturing the same will now be described in detail with reference to specific embodiments shown in the drawings. FIG. 1 is a schematic side view showing an example of a specific apparatus adapted to the manufacturing method for manufacturing the FRP spring according to the present invention, and FIG. 2 is a specific side view of the FRP spring according to the present invention. FIG. 2A shows the FR of FIG.
FIG. 2B is a schematic side view showing the basic configuration of the P spring.
2C is a cross-sectional view taken along the line XX in FIG. 2A, and is a cross-sectional view showing an example of the solid braid tissue body 10A and an example of the hollow braid tissue body 10B. On the other hand, FIG. 2D, FIG. 2E, and FIG. 2F are schematic diagrams showing different winding diameters of the coil spring.

On the other hand, FIG. 3 is a schematic perspective view showing the basic structure of a braided fabric body woven by a braider device. FIG. 4 is a schematic side sectional view showing an example of the basic configuration of a multiple braider device for weaving a braided fabric body for an FRP spring according to the present invention.

First, one structural example of the multiple braider device will be described with reference to FIG. In FIG. 4, the multiple braider device includes an automatic mandrel feeder (not shown), a plurality of vertical braider units BR, a lapping device RA, a shake preventing tool Os, and an automatic preform take-out device Pu. Are arranged in series in order from the right side in the figure.

As shown in FIG. 4, the braider unit BR feeds the braid yarns Y (4, 4) and the central yarn y (5) for forming the braid tissue layer 2 around the mandrel M. . In the present invention, when the wire for the FRP spring is the hollow braid structure 10B, the mandrel M is used, and when the wire for the FRP spring is the solid braid structure 10A,
The mandrel M is unnecessary.

The braider unit BR has a vertical hole surface 21 having a central hole 21a through which the mandrel M passes, and two wavy annular tracks (not shown) formed outside the central hole 21a, A large number of two groups of bobbin carriers 22 guided in these annular orbits and traveling in mutually opposite directions, a bobbin stand erected from the orbital surface 21, and an erected from the center of the orbital surface 21 surrounded by the orbital. And a plurality of central yarn supplying cylinders 23.

The bobbin carrier 22 has a pair of yarns Y, Y which obliquely intersect each other on the surface of the mandrel M at a braiding angle of ± θ °.
(4, 4) is paid out, and the bobbin B for the braiding thread on which the braiding thread Y is wound is set. The bobbin stand is for paying out the central yarn y (5) along the longitudinal direction of the mandrel on the surface of the mandrel M, and the bobbin b for the central yarn wound with the central yarn y is set. The braided yarn Y and the central yarn y are reinforced fibers impregnated with a thermosetting resin in advance.

In FIG. 4, the mandrel M is wound by a chuck (not shown) on the right side in FIG. 4 at a constant speed and wound around the surface so that a plurality of braid yarns Y, Y intersect with each other, and a central yarn y. Are combined to form the braided tissue layer 2.

On the other hand, the lapping device RA is arranged vertically next to the braider unit BR at the rear end (the left end in FIG. 4) and has a large gear 24 having a central hole 24a through which the mandrel M passes. And this big gear 24
A plurality of support gears 25 for rotatably supporting the large gear 24, a motor 26 with a gear for forcibly rotating the large gear 24, and a tape unwinder 1 attached to the large gear 24.
8 and. The tape unwinder 18 is the tape 1
The tape reel 17 wound with 3 is mounted exchangeably.
As the tape 13, a heat-shrinkable tape is used, which is unwound from the tape reel 17 and guided by the guide roller and the tension roller, so that the braid structure 10 of the mandrel M is formed.
The braided tissue body 10 is wrapped around the surface of the body and tightens and protects the braided tissue body 10 before hardening.

The wrapping device RA comprises a braided tissue 1
A tension adjusting means (not shown) is provided to adjust the tension of the tape 13 wound around the surface of No. 0. Even if the conditions such as the outer diameter of the mandrel M, the feeding speed, the thickness of the tape 13 and the winding speed of the mandrel M are different, the tension adjusting means can maintain an appropriate tape tension and minimize the breakage of the tape due to overtension. .

The shake prevention tool Os is a lapping device R.
It is arranged next to A, and is provided with two sets of shake preventing rollers 27, 27 which are pressed in directions toward each other. This shake prevention tool Os prevents the mandrel M from meandering by the rollers 27, 27 of each set. The automatic preform take-out device Pu is provided with a chuck 28 for pulling out the mandrel M while gripping the tip of the mandrel M which has come out of the shake preventing tool Os.

Next, the basic structure of the braided tissue according to the present invention will be described in detail based on the basic configuration example shown in FIG. The basic tissue body 1 shown in FIG. 3 is a schematic view in which a cylindrical (pipe-shaped) composition body is formed into one braid layer 2 in order to characterize the basic configuration of the present invention. The braid structure 10 is composed by organizing a plurality of material layers into a laminated structure.

In the example shown in FIG. 3, the braid layer 2 is
The braid yarns 4 and 4 having a braid angle of ± θ ° with respect to the axis and the central yarn 5 having an angle of 0 ° with respect to the axis are knitted. The braid yarns 4 and 4 and the central yarn 5 are the mandrel m
(A mandrel is not used in the case of a solid body) is selectively combined and woven as the braided fabric body 10 along the mandrel m.

In the method of manufacturing the FRP spring according to the present invention, the reinforcing fiber impregnated with the resin is set in the braider device BR and the braided body 1 is braided.
Braiding step 11 for weaving 0, and lapping step 1 for continuously winding a heat shrinkable tape 13 around the braid structure 10 while weaving the braid structure 10.
2 and a coil forming step 15 in which the braided braided tissue 14 is spirally wound and hardened to form a coiled spring tissue CS.

According to the present invention, in the braiding step 11, glass, carbon, and organic fibers are used to set reinforcing fibers impregnated with resin (thermosetting resin) in advance in the braiding device BR, The braided fabric body 10 is woven by braiding. In this invention, the braid 4
By changing the set angle ± θ of 4, for example,
When the coil spring formed by the braided braid body 10 having the braid angle of 10 ° is compared with the coil spring formed by the braid braided body 10 having the braid angle of 45 °, the shear elastic modulus G of the coil wire itself changes. , The same wire diameter r,
Even with the same winding diameter R, the same number of windings, and the same winding pitch,
The spring constant (spring characteristic) of the coil spring CS in the finish can be changed. In other words, the braid 4,
Coil springs CS having different spring constants can be designed by changing only the set angle of 4 ± θ °.

Further, in the present invention, by utilizing the above-mentioned principle, the braided fabric body 10 is woven while changing the braiding angle ± θ ° of the braided yarns 4 and 4 during the braiding process, and the braided fabric body 10 is woven. 10 makes it possible to manufacture a non-linear spring that integrally and continuously has portions having different spring constants in the winding length direction of the spring. When such a non-linear spring is formed as a metal spring, it is formed by means of unequal pitch coil springs or different winding diameters R in the winding length direction of the spring.
However, this manufacturing is extremely difficult, and in the case of the unequal pitch coil spring, since the pitch is changed and manufactured, the free length of the spring itself becomes long.

On the other hand, the wrapping step 12 is a step of continuously winding the heat shrinkable tape 13 around the braided fabric body 10 while weaving the braided fabric body 10. In the wrapping step 12, the reel 17 containing the heat-shrinkable tape 13 is rotated around the braided tissue 10 to change the winding tension and the winding pitch of the heat-shrinkable tape 13, so that the woven braided tissue 10 is woven. Wrapping. This lapping allows the resin to flow appropriately and obtain an appropriate Vf (resin content), which improves the mechanical properties of the material itself. Further, by changing the winding tension and the winding pitch of the heat-shrinkable tape 13, various spring shapes and mechanical characteristics can be created.

After the lapping step 12, the braided braid structure 14 is wound around the coil forming drum 16 having the spiral groove 16a. That is, everything up to coil shape production can be continuously automated, and mass productivity is improved. Then, the coil forming drum 16 is cured together with the drying furnace. After curing, the drum is wicked and the heat shrink tape is removed to obtain the FRP coil spring CS.

In the present invention, regarding the coil spring CS made of FRP, the factor that defines the spring constant of the FRP spring depends on the value of the braid angle ± θ ° of the braid, and It is also possible to manufacture a coil spring CS which integrally and continuously has portions having different spring constants in the winding length direction of the spring according to the value of the set angle ± θ °. Further, the present invention relates to the FRP.
The winding diameter of the spring may be the same diameter R from one end to the other end in the winding length direction of the spring.
(See FIG. 2D), the spring may have stepwise different diameter portions R ₁ and R ₂ from one end to the other end in the winding length direction (see FIG. 2E) or the diameter R _{3 at} one end. To the diameter R _{4 at the} other end, the diameter may continuously change (see FIG. 2F). Furthermore,
The braid structure 10 for the coil spring CS according to the present invention may be constituted by a solid braid structure 10A as shown in FIG. 2B, or a hollow braid structure 10B as shown in FIG. 2C. You can also do it.

[0034]

According to the FRP spring and the method of manufacturing the same of the present invention having the above-mentioned constitution, in the braiding process by the braider device, the braiding yarn having the braid angle of ± θ ° to the axis and the angle of 0 ° to the axis are 0 °. While weaving the braided braided tissue 10 with the center yarn, the heat-shrinkable tape 13 is lapped in the lapping step, and the braided braided braid 14 is spirally wound up and hardened to harden the FRP coil. By changing the braiding angle ± θ ° of the braiding yarn in a series of manufacturing processes for the spring CS, the other elements (diameter r of the wire, winding diameter R, winding number, winding pitch, etc.) can be changed without changing. A coil spring having a different spring constant, and further, weaving the braided cord body 10 while changing the braiding angle ± θ ° of the braiding yarn during the braiding process. With the above, it is extremely effective in that a so-called non-linear spring having a portion having different spring constants continuously in the winding length direction of the spring can be easily manufactured.

Further, according to the present invention, there is provided a coil spring having an FRP tissue body obtained by braiding as an element wire, which is lightweight, has high strength and elastic modulus, and has high electric insulation. It is possible to provide a coil spring having excellent chemical resistance and corrosion resistance, and its utility is great as a mechanical structural member in various industrial fields, and it works extremely effectively in that respect.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an example of a specific apparatus adapted to a manufacturing method for manufacturing an FRP spring according to the present invention.

FIG. 2 shows a specific embodiment of an FRP spring according to the present invention, and FIG. 2A shows the FRP spring.
2B and 2C are schematic side views showing the basic configuration of the spring, and FIGS. 2B and 2C are cross-sectional views taken along line XX in FIG. 2A, showing an example of a solid braided tissue and an example of a hollow braided tissue. 2D, 2E, and 2F are cross-sectional views illustrating
[Fig. 4] is a schematic view showing a mode in which the winding diameter of the coil spring is different.

FIG. 3 is a schematic perspective view showing a basic structure of a braided fabric body woven by a braider device.

FIG. 4 is a schematic side sectional view showing an example of a basic configuration of a multiple braider device for weaving a braided fabric body for an FRP spring according to the present invention.

[Explanation of symbols]

1 basic organization Two braid layers Braiding thread with a braid angle of ± θ ° with respect to the 4, 4 axis 5 Central thread whose angle to the axis is 0 ° 10 Braid organization 10A solid braided body 10B Hollow braid organization 11 Braiding process 12 wrapping process 13 Heat shrink tape 14 Braided braided tissue 15 Coil forming process 16 coil forming drum BR braider unit RA wrapping device Y braid y Central thread B bobbin for braiding b Central thread bobbin CS coil spring

Continued front page    F-term (reference) 3J059 AD04 BA05 BA09 BC20 GA50                 4F205 AB11 AD16 AG13 AG14 AH15                       HA02 HA29 HA35 HA46 HB02                       HG05 HK07 HL09 HL13 HT13                       HT17 HT22

Claims (10)

[Claims] 1. A braiding yarn having a braiding angle of ± θ ° with respect to an axis,
A method for producing an FRP tissue body, in which a braid layer is constructed by selectively combining a central yarn having an angle of 0 ° with respect to an axis, and a plurality of the braid layers are laminated to form a braided tissue body, which comprises a resin composition Set the reinforcing fiber impregnated with in a braider device,
A braiding step of weaving a braided braid by braiding, a lapping step of continuously winding a heat-shrinkable tape around the braided braided body while weaving the braided braided body, and a spiral braided braided body And a coil forming step of winding and hardening to form a coil-shaped spring structure body. 2. The FRP spring having a different spring constant according to a different braid angle is manufactured by changing a braid angle ± θ ° of the braid in the braiding step. Manufacturing method of FRP spring. 3. A braid structure is woven while changing a braid angle ± θ ° of the braid during the braiding step, and a portion having a different spring constant in a winding length direction of the spring is formed by the braid structure. The method for manufacturing an FRP spring according to claim 1, wherein the FRP spring is formed integrally and continuously. 4. A braiding yarn having a braiding angle of ± θ ° with respect to an axis,
A braid layer is designed by selectively combining with a central yarn having an angle of 0 ° with respect to the axis, and a plurality of the braid layers are laminated to form a braid structure, and the braid structure is spirally wound and formed. F
An FRP spring, wherein the factor that defines the spring constant of the FRP spring is a factor according to the value of the braiding angle ± θ ° of the braiding thread. 5. Depending on the value of the braid angle ± θ ° of the braid,
The FRP spring according to claim 4, wherein the FRP spring is integrally formed with portions having different spring constants in the winding length direction of the spring. 6. The winding diameter of the FRP spring has the same diameter from one end to the other end in the winding length direction of the spring.
FRP spring described in. 7. The FRP spring according to claim 4, wherein the winding diameter of the FRP spring has different diameter portions from one end to the other end in the winding length direction of the spring. . 8. The FRP constituting the FRP spring
8. The wire according to claim 4, wherein the wire has a wire diameter having different diameter portions from one end to the other end in the winding length direction of the spring.
RP spring. 9. The braided braid body for the FRP spring is a solid braided braid body.
~ The FRP spring according to claim 8. 10. The FRP spring according to claim 4, wherein the braid structure for the FRP spring is a hollow braid structure.