JPH10110557A - Connecting post - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve weight and corrosiveness by forming a FRP pipe by four or more cross layers, disposing a carbon fiber in the wall, and bringing a suspended piece into contact with the outer surface. SOLUTION: The innermost first layer 1 of a FRP pipe FP is a tubular glass fiber layer. A second layer of the outside of the above is spirally wound to form a winding layer. A third layer 3 provided close to the outside of the second layer is a large-diameter tubular glass fiber layer aligned in the longitudinal direction similarly to the first layer. A fourth layer formed on the outside of the third layer is spirally wound to be reverse to the second layer to form a winding layer. A mat layer of a fifth layer 5 is formed closely to the outside of the fourth layer. Subsequently in order to eliminate electro static charge, a carbon fiber is disposed extending over the total length of the suitable region in the peripheral wall of FP. Further, a suspended piece is provided on the root of an arm for installing a wire to disperse concentratively applied stress. Thus, strength and rigidity are further improved, and the occurrence of deformation of the FRP pipe can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a connecting pole which is attached to a front end of a pole to make the pole appear longer and to increase the position of an electric wire.

[0002]

2. Description of the Related Art As a connecting pole mounted on the tip of a utility pole, a steel connecting pole is known. (For example, actual Kaihei 5
See JP-A-21938. The first prior art raises problems of poor workability due to heavy weight and salt damage (corrosion) in coastal regions. FRP is known as a material which is lighter and more corrosion-resistant than the steel. (The specific gravity of FRP is 1
/ 4. The FRP is manufactured by a hand lay-up method, a spray-up method, a cold press method, a pultrusion molding method, a filament winding method (hereinafter referred to as F).
W method) is widely known. Among these second prior arts, the manufacturing methods other than the pultrusion molding method and the FW method are based on the fact that the proportion of the glass fiber in the FRP is small, the glass fiber is a short fiber, and the like, and the strength is insufficient and the rigidity is insufficient. There is a problem that when a pipe-shaped product is manufactured, it is deformed into an elliptical shape. As a countermeasure for such problems,
As proposed in JP-A-128264, a shape in which a knot (barb) is arranged at an appropriate position of a pipe is known. This third conventional technique has the disadvantages that it takes a lot of time and effort to manufacture and increases the cost.

Further, as another technical means for improving rigidity, there is known a means having a three-layer structure of glass fiber-carbon fiber-glass fiber as disclosed in Japanese Patent Application Laid-Open No. 4-47084. However, the high price of carbon fiber leads to high costs. Incidentally, in the second conventional technique, there are a FW method and a pultrusion method as a means for producing glass fibers continuously. However, the FW method requires a very long production time per piece, and is cost-effective. There is a problem that the pultrusion molding method has a problem that the strength in the direction perpendicular to the glass fiber is very weak. As discussed above, the conventional technology is:
No matter which one you pick up, it's hard to apply to connecting pillars.

[0004] The present invention has been made in view of the above-mentioned conventional circumstances, and in particular, by forming the FRP tube with four or more cross layers, the weight and corrosiveness seen in the first prior art described above. An object of the present invention is to improve the problem and to make up for the insufficient strength and the insufficient rigidity to improve the second conventional technique.

[0005]

In order to achieve the above-mentioned object, the present invention provides a technical means which comprises forming a connecting post with an FRP pipe having a peripheral wall composed of four or more crossed layers;
Arranging a carbon fiber at an appropriate position in the wall of the P pipe to form a connecting column, and connecting a vertical piece provided at a mounting portion of an arm mounted on the FRP pipe by contacting the outer surface of the FRP pipe. That is, to construct pillars.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Claims 1 to 3 will be described with reference to FIGS. The FRP tube FP is manufactured by a pultrusion molding method in order to make the glass fibers continuous, and in order to eliminate the lack of strength in the direction perpendicular to the glass fibers, the peripheral wall is composed of cross layers 1 to 5 composed of four or more FRP layers.

[0007] The peripheral wall of the FRP tube FP is formed by forming cross layers 1 to 5 (five in the illustrated example) composed of four or more FRP layers in the thickness direction. explain. The innermost first layer 1 is a glass fiber layer formed in a tubular shape aligned in the length direction and the radial direction, and a second layer 2 formed outside the first layer 1 is spirally formed on the first layer. The third layer, which is a wound inner winding layer and is provided in close contact with the outer winding layer, is a glass fiber layer formed into a large-diameter tubular shape aligned in the length direction similarly to the first layer. The fourth layer formed outside the third layer is an outer winding layer formed by spirally winding the third layer in a direction opposite to that of the second layer, and is formed in close contact with the outer layer. The outermost fifth layer is a mat layer.

Although the FRP tube FP of the present invention has been described with reference to an example in which the peripheral wall is composed of five intersecting layers 1 to 5, the present invention is not limited to the five layers. Of course, it may be composed of more than layers. In this case, the connecting post may be charged, and if this occurs, the connecting post deteriorates and the durability decreases. As a means for solving such a problem, the peripheral wall of the FRP tube FP constituting the connecting post is used. F
Arrange carbon fiber 6 over the entire length of RP pipe,
Construct so that it can be used as ground.

A plurality of carbon fibers 6 are arranged at appropriate intervals in the circumferential direction of the first layer 1 as shown in FIG. 2, but when the first layer is formed on the third layer 3 as shown in FIG. In the same way as shown in FIG. 4, a plurality of pieces are collectively arranged on the third layer 3 as shown in FIG. The four layers may be wound spirally in the same direction as the respective winding layers, and although not shown, an appropriate number of windings may be arranged on all the first to fifth layers 5. It may be installed, but it will be installed considering cost. Thus, the first layer 1 shown in FIG. 2 or the third layer 3 shown in FIG. 3 and FIG.
When arranging the glass fibers, it is free to replace the glass fibers with carbon fibers or add carbon fibers to the glass fibers.

Arm 7 for attaching electric wire 9 to connecting post
When a well-known arm for a concrete utility pole or a wooden utility pole is attached to a connecting pole, a deformed portion (a concave portion) is generated in the connecting pole due to an attachment portion of the arm (a solid base of the arm), and durability is impaired. Because there is a disadvantage, to resolve this disadvantage,
A hanging piece 8 is provided at a mounting portion of the arm 7 (at the base of the arm),
This is brought into contact with the outer surface of the FRP pipe FP used as a connecting post, and the stress intensively applied to a part of the FRP pipe FP from the mounting portion of the arm 7 is dispersed by the hanging piece 8 to deform the FRP pipe FP. It is possible to prevent occurrence and reduction in durability due to this. (See FIG. 6)

When the FRP pipe FP is mounted on a ready-made electric pole 10 (concrete or wooden), the FRP pipe FP is a straight pipe, whereas the electric pole 10 is a tapered pole. Cannot be fixed sufficiently, resulting in an unstable mounting state. In order to solve such disadvantages, a low-rigidity and elastic spacer 11 is fitted to the tip of the utility pole 10, and then the FRP tube FP is mounted to create a stable mounting state with the spacer 11.

The spacer 11 is formed of a high-rigidity material such as rubber or synthetic resin having low rigidity and elasticity. One side in the length direction (upper part in FIGS. 7 and 8) is formed thick and the other side is formed. (The lower part in the figure) is gradually thinned, and the other side is thinnest. The spacer 11 is
With one side of the thick wall facing the narrow tip of the utility pole 10,
And the FRP tube FP as a straight tube is attached to the tapered pole 10 with good stability.

[0013]

The present invention has the following effects by being configured as described above. Since the FRP pipe is composed of four or more cross layers, it succeeds in achieving weight reduction and corrosion resistance, and can compensate for insufficient strength or rigidity. Can be remarkably improved. By arranging the carbon fiber at an appropriate position in the wall of the FRP tube, strength and rigidity are further improved, and it is useful for preventing the FRP tube from being charged. Since the vertical piece provided on the mounting portion of the arm abuts against the outer surface of the FRP pipe, the stress intensively applied to a part of the FRP pipe from the mounting portion of the arm can be dispersed by the vertical piece, causing deformation of the FRP pipe. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an example of the first embodiment of the present invention.

FIG. 2 is a perspective view showing another example of the first embodiment and an example of the second embodiment.

FIG. 3 is a perspective view showing another example of item 1 and another example of item 2;

FIG. 4 is a perspective view showing still another example of the item 1 and another example of the item 2;

FIG. 5 is a perspective view showing still another example of the above item 1 and a still further example of the above item 2.

FIG. 6 is an explanatory view of item 3 in both (1) and (2).

FIG. 7 is an explanatory view of use as a connecting post of the FRP tube.

FIG. 8 is a cut-away development view of a spacer.

[Explanation of symbols]

 FP: FRP tube 1-5: Cross layer 6: Carbon fiber 7: Arm 8: Vertical piece

Claims (3)

[Claims] An FR having a peripheral wall composed of four or more cross layers.
A connecting post consisting of a P tube. 2. An FR having a peripheral wall composed of four or more cross layers.
2. The connecting post according to claim 1, wherein a carbon fiber is disposed at an appropriate position in the wall of the P pipe. 3. An FR having a peripheral wall composed of four or more cross layers.
The connecting post according to claim 1, wherein a vertical piece provided on a mounting portion of an arm mounted on the P pipe abuts on an outer surface of the FRP pipe.