JPH0537A - Common joint rod - Google Patents

Abstract

PURPOSE:To facilitate the finishing of a fitting hole and to obtain the subject easily disconnectable rod by forming a specific resin layer on the inner surface of a fitting hole at an end of the 2nd rod member and inserting a fitting piece of an end of the 1st rod member made of a resin containing high-strength fibers into the fitting hole of the 2nd rod member. CONSTITUTION:A fitting piece 1 is formed at an end of a cylindrical 1st rod member R1 made of a resin containing a high-strength fiber such as carbon fiber and glass fiber. A fitting hole K capable of accepting the fitting piece is formed at an end of a 2nd rod member R2 and a resin layer 2 containing a fiber having not so high strength, e.g. cotton or polyester is formed on the inner surface of the fitting hole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side-by-side connecting rod and a method for manufacturing the rod, and more specifically, a first rod member and a second rod member are arranged along the axial direction of the rod, and the first rod is also provided. A fitting hole is formed at the end of the second rod material side of the material, and a fitting piece that can be inserted into the fitting hole is formed at the end of the second rod material on the first rod material side. The present invention relates to an improvement of a parallel joint rod in which a first rod member and a second rod member are connected by inserting one piece into a fitting hole.

[0002]

2. Description of the Related Art Generally, in a rod having the above structure, a rod material is made by winding a prepreg obtained by impregnating high strength fiber such as carbon fiber or glass fiber with a resin, around a mandrel (core material),
The technique of forming a fitting hole at the end of the first rod material by forming it into a cylindrical shape by firing, and using a rod material formed as described above with a tool of high hardness such as a diamond reamer The inner surface of the rod material by setting the position on the inner surface of the end of the rod material and arranging the glass fiber prepreg when the prepreg is wound around the mandrel as described above. There is a method in which a glass fiber layer is formed on the glass fiber, and the glass fiber layer is subjected to processing such as finishing with a predetermined accuracy using a tool having a high hardness such as a diamond reamer.

[0003]

The conventional parallel splicing rod will now be considered. As described above, in the case where the rod is formed by using high-strength fiber such as carbon fiber or glass fiber, strength, And, while having a good flexibility, the rod can be formed relatively lightly, but on the other hand,
Since the strength of the fiber is extremely high, in order to finish the fitting hole with a predetermined accuracy, a tool of high hardness such as a diamond reamer is required as described above. Even if formed, since the high-strength fiber is exposed on the inner surface of the fitting hole, when the fitting operation is repeated during use, the fitting piece of the second rod material is worn and fits. The precision may be reduced. Further, in the structure in which the high-strength fiber is exposed on the inner surface of the fitting hole as described above, elastic deformation is not often performed on the inner surface portion of the fitting hole, and therefore, for example, a force is applied in the bending direction. There is room for improvement because it is almost impossible to release the mating (causing the rod material to crack when the force in the bending direction is increased). It is an object of the present invention to easily finish fitting holes, to prevent fitting accuracy from deteriorating even during long-term use, and to easily release fitting, and a manufacturing method thereof. Is to reasonably compose.

[0004]

A feature of the present invention is that a side-by-side connecting rod in which a fitting piece at an end portion of a second rod member is inserted into a fitting hole at an end portion of a first rod member for connection therewith. In the above, the first rod material is formed into a tubular shape by molding a resin containing high-strength fibers such as carbon fibers and glass fibers, and non-high-strength fibers such as cotton and polyester are formed on the inner surface of the fitting hole. The second aspect of the present invention is characterized in that the fitting layer at the end of the second rod member is inserted into the fitting hole at the end of the first rod member. In the method for producing a parallel-joining rod, the first prepreg obtained by impregnating a non-high-strength fiber such as cotton or polyester with a resin is wound around a core material at a position corresponding to an end of the first rod material. After that, resin is applied to the high-strength fiber such as carbon fiber or glass fiber from the outer surface of the first prepreg to the core material at a portion corresponding to the entire length of the first rod material. Winding a second prepreg was immersed,
By firing, the first rod material is formed into a tubular shape, and at the same time, a resin layer containing non-high-strength fiber is formed in the fitting hole portion. The action and effect are as follows. On the street.

[0005]

When the above features are constructed as shown in FIGS. 1 to 3, for example, the resin layer 2 containing the non-high-strength fiber is formed on the inner peripheral surface of the fitting hole K. A tool with a high hardness is not required even when finishing to a predetermined accuracy, and high strength fibers such as carbon fiber and glass fiber are not exposed on the inner surface of the fitting hole K, so compared with conventional rods. Even when the fitting operation is repeated during use, the fitting piece 1 of the second rod material R ₂ is less likely to be worn. Further, in the present invention, since the resin layer 2 having a softer property than the non-high strength fiber is formed on the inner surface of the fitting hole K, when the fitting is released by applying a force in the bending direction, This bending operation is allowed due to the deformation of the resin layer 2.

[0006]

As described above, there is provided a side-by-side connecting rod and its manufacturing method in which the fitting hole can be easily finished, the fitting accuracy is not deteriorated even during long-term use, and the fitting can be released easily. It was reasonably constructed. Particularly, in the present invention, since the inner surface of the fitting hole is deformed relatively flexibly during the fitting operation, there is also an effect that the feeling at the time of this operation becomes good.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, in the fitting hole K at the tip of the first rod material R ₁ arranged at the hand side, a straight fitting piece at the rear end of the second rod material R ₂ arranged at the tip side. A parallel rod is formed by inserting 1 and connecting them. In this parallel connection rod, each of the first and second rod members R ₁ and R ₂ is formed by molding a resin containing high-strength fiber such as carbon fiber or glass fiber into a tubular shape, and the fitting hole K
A resin layer 2 containing non-high-strength fibers such as cotton and polyester is formed on the inner surface thereof.

A method of manufacturing the first rod material R ₁ of this rod is represented as shown in FIGS. 2 and 3, and in this method, as shown in FIG. 2, it corresponds to the tip of the first rod material R _1. After winding the first prepreg 2 obtained by impregnating non-high-strength fibers such as cotton and polyester with a resin around the mandrel 3 (an example of the core material) at the position where the first rod is attached to the outer surface of the first prepreg 2. Material R
A sheet-shaped second prepreg 4 obtained by impregnating high-strength fiber such as carbon fiber or glass fiber with a resin is wound over the mandrel 3 at a position corresponding to the rear end of ₁ , and the heat-shrinkable tape 5 is applied to the outer surface of the second prepreg 4. To wind. The second prepreg 4 has a fiber direction orthogonal to the axial direction of the mandrel 3 4A,
4B, which are parallel to each other, and 4C which are orthogonal to each other, are sequentially overlapped and wound.

Next, the wound material is fired at a predetermined temperature,
By pulling out the mandrel 3 and removing the tape 5, the first rod material R ₁ is formed into a tubular shape as shown in FIG. During this firing, the three layers of the second prepregs 4A, 4
B and 4C are integrated by melting each other,
The first prepreg 2 is also integrated with the rod material R ₁ . Thereafter, the fitting layer K is finished to a predetermined accuracy by processing the resin layer 2 formed by curing the first prepreg 2 with the reamer 6.

Since the resin layer 2 having a flexible property is formed on the inner surface of the fitting hole K in the side-by-side connecting rod constructed as described above, the fitting can be released easily by applying a force in the bending direction. Moreover, the fitting accuracy is not deteriorated even when used for a long period of time, and it can be comfortably used.

[Other Embodiments] In addition to the above embodiments, the present invention is
For example, the shape of the fitting piece may be tapered, and
To form this tapered portion, it is possible to mold the engaging piece into a shape that smoothly connects with the outer surface of the rod, instead of reducing the diameter stepwise as in the above-described structure. Further, according to the present invention, the second rod material may be arranged on the hand side and the first rod material may be arranged on the tip side.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is a side view of a partially cutaway view showing a connection structure.

FIG. 2 is a sectional view showing a state in which a prepreg is wound around a mandrel.

FIG. 3 is a sectional view of the second rod material after firing.

[Explanation of symbols]

1 Fitting piece 2 Resin layer, 1st prepreg 3 Core material 4 2nd prepreg K Fitting hole R ₁ 1st rod material R ₂ 2nd rod material

Claims (2)

[Claims] 1. A first rod material (R ₁ ) along the axial direction of the rod.
And a second rod member (R ₂ ) are arranged, and a fitting hole (K) is formed at the end of the first rod member (R ₁ ) on the second rod member side.
A fitting piece (1) that can be inserted into the fitting hole (K) is formed at the end of the second rod material (R ₂ ) on the first rod material side, and the fitting hole of this fitting piece (1) is formed. A parallel rod for connecting the first rod material (R ₁ ) and the second rod material (R ₂ ) by inserting it into (K), wherein the first rod material (R ₁ ) is made of carbon fiber or glass. A resin layer (2) containing a non-high-strength fiber such as cotton or polyester is formed on the inner surface of the fitting hole (K) while being formed by molding a resin containing high-strength fiber such as fiber into a tubular shape. This is a parallel rod. 2. A first rod material (R ₁ ) along the axial direction of the rod.
And a second rod member (R ₂ ) are arranged, and a fitting hole (K) is formed at the end of the first rod member (R ₁ ) on the second rod member side.
A fitting piece (1) that can be inserted into the fitting hole (K) is formed at the end of the second rod material (R ₂ ) on the first rod material side, and the fitting hole of this fitting piece (1) is formed. A method for producing a parallel rod in which the first rod material (R ₁ ) and the second rod material (R ₂ ) are connected by being inserted into (K), the end of the first rod material (R ₁ ). After winding the first prepreg (2) in which a non-high-strength fiber such as cotton or polyester is impregnated with resin around the core material (3) at a position corresponding to the part, the outer surface of the first prepreg (2) From first
Winding and firing a second prepreg (4) obtained by impregnating high-strength fibers such as carbon fiber and glass fiber with resin over the core material (3) at a portion corresponding to the entire length of the rod material (R ₁ ). According to the method, the first rod material (R ₁ ) is formed into a tubular shape, and the resin layer (2) containing the non-high-strength fiber is formed in the fitting hole (K), .