JPH09198947A - Insulated operating rod - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insulated operating rod which can increase the torsional and bending strength without increasing the outside diameter or the weight. SOLUTION: As a reinforcing material, aramide fiber 1 is used, which is lighter and has greater strength than conventional glass fiber and allows plastic material 2 to permeate the filament inside of the fiber by pressurizing, and an inner layer 3 of cylindrical shape is formed from this plastic 2 reinforced with aramide fiber 1, and thereon a glass fiber reinforced plastic layer 4 is provided, and further thereover a urethane coating 5 is applied as the finish process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an indirect live wire insulated operating rod for mounting construction tools at the tip of a distribution line during uninterruptible construction.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, glass fiber is used as a reinforcing material and impregnated with a plastic such as epoxy resin, and a urethane is formed on a glass fiber reinforced plastic layer 4 formed into a hollow cylinder. An insulated operating rod 6 with a coating 5 was used. In the case of glass fiber, since the filaments that make up the fiber are rod-shaped, plastic does not penetrate into the interior of the filament, so the plastic and glass fiber do not completely integrate, and if excessive twisting or bending stress is applied. However, there is a drawback that the fiber and the plastic are easily separated. For example, as shown in FIG. 3, a tool 8 is attached to the tip end of the insulating operation rod 6 via a joint 7 and the operator operates the tool 8 in order to operate the tool 8.
When the grip is gripped and a twisting force or a bending force is applied, the force cannot be endured, and the force is concentrated, so that there is a drawback that the joint portion 7 is easily damaged. Further, if the glass fiber reinforced plastic layer 4 is thickened in order to increase the strength of the insulating operation rod 6, there is a drawback that the outer diameter becomes large and heavy, which makes it difficult to use.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the drawbacks described in the prior art, and is an insulated operating rod capable of increasing torsional and bending strengths without increasing the outer diameter and weight. The purpose is to provide.

[0004]

[Means for Solving the Problems] As a reinforcing material, it is lighter and stronger than conventional glass fibers,
Aramid fibers are used that allow the plastic to penetrate into the filaments of the fiber.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, by applying pressure from the outer circumference, epoxy resin is introduced into the filament of aramid fiber 1. A glass fiber reinforced plastic layer 4 is applied on a hollow cylindrical inner layer 3 formed by infiltrating a plastic 2 such as, and the surface of the glass fiber reinforced plastic layer 4 is smoothed, and then urethane coating 5 is further applied. Give. The pressure applied from the outer circumference is, for example,
A heat-shrinkable tape is wound on the hollow cylindrical inner layer 3, and the shrinkage force generated when the tape is heated and shrunk is used to pressurize or put it in a vulcanization kettle. Press. By this pressurization, the air contained in the filament of the aramid fiber 1 is pushed out, the plastic 2 then flows in, and the plastic 2 permeates into the inside of the aramid fiber 1.

Aramid fiber 1 molded in this way
Since the surface of the inner layer 3 containing the is uneven, and it is necessary to polish the unevenness to finish it into a smooth surface, it is impossible to completely scrape off the filament of the aramid fiber 1 exposed on the surface. Then, the polishing of the inner layer 3 is omitted, and the glass fiber reinforced plastic layer 4 which is easily polished and finished is provided on the inner layer 3. Since the glass fiber reinforced plastic layer 4 is intended for polishing finish, it may have a small thickness. After smoothing the surface of the glass fiber reinforced plastic layer 4, a urethane coating 5 is applied to finish.

[0007]

Since the present invention is configured as described above, it has the following effects. (1) When the plastic has fully penetrated into the aramid fiber and the insulated operating rod has the same dimensions as the conventional one,
The breaking strength due to bending is 3 to 4 times higher. (2) The filament of the aramid fiber is exposed on the surface of the inner layer only with the inner layer having the aramid fiber as a reinforcing material, and moisture penetrates from there to lower the insulation resistance. Since it has a plastic layer, surface gel processing is possible, and it can be finished on a clean surface that is free of water intrusion. (3) By providing a glass fiber reinforced plastic layer on the upper layer, it becomes possible to apply aramid fibers as a reinforcing material to an insulating operation rod for hot-line work. (4) Lighter than the conventional insulated operating rod of the same size,
Since the breaking strength is large, the outer diameter can be finished thin.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of an embodiment of the present invention.

FIG. 2 is a side view showing an example of implementation.

FIG. 3 is a sectional view showing a conventional example.

[Explanation of symbols]

 1 Aramid fiber 2 Plastic 3 Inner layer 4 Glass fiber reinforced plastic layer 5 Urethane coating 6 Insulation operating rod 7 Joint 8 Tool

Claims (1)

[Claims] 1. A plastic (2) is placed inside a filament of an aramid fiber (1) by applying pressure from the outer periphery.
A glass fiber reinforced plastic layer (4) is applied onto a hollow cylindrical inner layer (3) formed by infiltrating the glass fiber, and the surface of the glass fiber reinforced plastic layer (4) is smoothed, and then urethane is further applied. Insulated operating rod characterized by being painted (5)