JP2002118941A - Protector for electric wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric wire protector which keeps a sufficient withstand voltage, and is attached and fixed to an electric wire easily and safely. SOLUTION: The outline shape of a cross section of the electric wire protector 10 is approximately elliptic. The protector 10 is made of electric insulating material having flexibility and elasticity, is formed into an approximately cylindrical shape divided in a circumferential direction so as to be expandable and openable, and has an electric wire inserting part 20 provided with an electric wire inserting hole 21 for inserting an electric wire 11, an engaging part 30 provided with a first engaging part 31 and a second engaging part 32 formed connected to the inserting part 20, and a protruded part 40 formed stretching along the longitudinal direction of the protector 10. The protector 10 can be fitted to the electric wire safely and easily, by expanding and opening the protector 10 and putting the electric wire 11 into the inserting hole 21, and engaging the first and second engaging parts 31, 32.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire protector used to protect electric wires by covering electric wires around insulators provided for fixing electric wires such as power transmission lines to electric poles or the like.

[0002]

2. Description of the Related Art Conventionally, an electric wire insulation sheet is wound around an electric wire around an insulator provided for fixing an electric wire such as a power transmission line to a power pole or the like, and a metal cable such as a copper wire is fixed. The member was wound around the electric wire insulating sheet body, and the copper wire as the fixing member was tightened to fix the electric wire insulating sheet body. This wire insulation sheet body is a flat sheet shape,
When wound around an electric wire, force is applied to deform it into a cylindrical shape and wound around the electric wire, and then a copper wire is wound around the wire to bind the copper wire and fix the wire insulating sheet body to the electric wire. Since the wire insulation sheet is a flexible material such as insulating rubber, the wire insulation sheet expands and flattens against the force applied when the wire insulation sheet is deformed into a cylindrical shape. Has the property of restoring to a shape,
It is not easy for only one worker to perform a work of winding a copper wire around a wire insulation sheet. The work of covering the electric wire with the electric wire insulating sheet is often performed at a high place, and the workability is closely related to ensuring the safety of the worker. If the wire insulation sheet covering the wires is not sufficiently fixed, the wires cannot be sufficiently protected, and the wires may be damaged, causing leakage of electric current and electric shock.

Accordingly, an object of the present invention is to provide a wire protector which can maintain sufficient withstand voltage performance and has excellent workability.

[0004]

SUMMARY OF THE INVENTION The present invention provides an electric wire protector made of a flexible and resilient electrically insulating material, which is divided in a circumferential direction and is formed in a substantially cylindrical shape so as to be expandable. An electric wire insertion portion provided with an electric wire insertion hole formed so as to extend along the longitudinal direction of the electric wire protector, and through which the electric wire is inserted in a state where the electric wire protector is attached to the electric wire,
A first fitting portion having a fitting ridge formed so as to be continuous with the wire insertion portion and extending along the longitudinal direction of the wire protector, and a fitting concave groove fitted with the fitting ridge. A fitting portion having a second fitting portion provided, and formed to extend along the longitudinal direction of the wire protector, at least a portion is formed to face the wire insertion hole, and at least a portion is formed by the wire. A wire protector having a projection disposed between an insertion hole and a fitting concave groove, wherein the outer shape of the cross section is substantially elliptical.

According to the present invention, the electric wire protector is made of an electrically insulating material having flexibility and elasticity, is formed in a substantially cylindrical shape that is divided in the circumferential direction and is expandable. An electric wire insertion portion provided with an electric wire insertion hole through which the electric wire is inserted when the electric wire is attached to the electric wire for protection, and a first fitting portion and a second fitting portion formed continuously with the electric wire insertion portion. It has a fitting portion and a protrusion formed to extend along the longitudinal direction of the wire protector, and the outer shape of the cross section of the wire protector is substantially elliptical. The wire insertion hole is formed along the longitudinal direction of the wire protector, the first fitting portion includes a fitting ridge formed to extend along the longitudinal direction of the wire protector,
The fitting portion includes a fitting concave groove that fits into the fitting ridge, and the protruding portion is formed at least partially facing the wire insertion hole,
And at least a part is arrange | positioned between an electric wire insertion hole and a fitting groove.

Since the wire protector has flexibility and resilience, the wire protector can be easily deformed when the wire protector is attached to the wire, and the wire protector attached to the wire is Restored to a tubular shape to fit the wire. The wire protector is divided in the circumferential direction of the tubular wire protector and is formed into a tubular shape so that it can be expanded.Therefore, when the wire protector is attached to the wire, the part of the wire protector that is cut in the circumferential direction. In, the wire protector can be expanded to place the wire in the wire protector. The electric wire insertion portion is formed to extend along the longitudinal direction of the electric wire protector, and the electric wire insertion portion is provided with an electric wire insertion hole through which the electric wire is inserted in a state where the electric wire protection device is attached to the electric wire, so that the electric wire is stored in the electric wire insertion hole. be able to. The fitting portion formed to be continuous with the wire insertion portion is fitted to the first fitting portion having the fitting ridge formed extending along the longitudinal direction of the wire protector and the fitting ridge. Since the second fitting portion having the fitting groove is provided, the fitting ridge provided in the first fitting portion and the fitting groove provided in the second fitting portion are fitted. By
It can be hermetically sealed at a location divided in the circumferential direction of the electric wire protector in which the electric wire is stored, so that rainwater or the like is prevented from seeping into the electric wire protector. At least a part of the protrusion formed to extend along the longitudinal direction of the wire protector is formed to face the wire insertion hole, and at least a part is disposed between the wire insertion hole and the fitting groove. Therefore, it is possible to set a longer creepage distance in the vicinity of the portion of the wire protector divided in the circumferential direction. Therefore, the withstand voltage performance of the wire protector can be improved. Since the outer shape of the cross section of the wire protector is substantially elliptical, the copper wire which is a fixing member wound around the outer periphery of the wire protector to fix the wire protector is in close contact with the outer surface of the fitting portion, The force applied to the wire protector in the direction in which the first fitting portion and the second fitting portion are detached due to the binding of the fixing member can be reduced.

Further, according to the present invention, the cross-sectional shape of the fitting ridge is
It is characterized by a substantially arrowhead shape. According to the present invention, since the cross-sectional shape of the fitting ridge is substantially an arrowhead shape, the fitting between the fitting ridge and the fitting groove is reliably achieved, and the fitting ridge and the fitting groove are formed. The wire protector is securely attached to the wire without being easily disengaged from the wire. Even if the wire protector is not exposed to the wind and rain for a long time after being attached to the wire, the wire protector does not separate from the wire, and the fitting between the fitting ridge and the fitting groove is not released. Therefore, even after a long period of time, rainwater or the like does not infiltrate into the wire protector, and the withstand voltage performance does not deteriorate. The arrowhead means the pointed part of the arrow, and the arrowhead shape means the shape of the pointed part of the arrow. That is, when the cross-sectional shape of the fitting ridge is substantially arrowhead shape, the shape of the cross-section that is a cross-section perpendicular to the axis perpendicular to the axis along the longitudinal direction of the wire protector of the fitting ridge, When the arrowhead is projected on a plane parallel to the axis of the arrowhead, which is a part like a stick for attaching the arrowhead and the arrow wing, the shape appears on the plane. That is,
The fitting ridge is an inner surface of the fitting portion facing the fitting groove in the fitted state in which the fitting ridge and the fitting groove are fitted in the cross-sectional shape of the fitting ridge. An extending portion extending from the joint base in a direction approaching the fitting groove, and a shape having a fitting protrusion wider than the extending portion, wherein the fitting protrusion is separated from the extending portion. It has a cross-sectional shape that is formed in a tapered shape as it goes in the direction.

[0008]

FIG. 1 is a perspective view of a wire protector 10 according to an embodiment of the present invention, FIG. 2 is a left side view of the wire protector 10, and FIG. FIG. 4 is a left side view of the wire protector 10 in an opened state, and FIG. 4 is a diagram for explaining an operation of the fitting portion 30 of the wire protector 10.

The electric wire protector 10 includes an electric wire 11 such as a transmission line.
Used to protect the electric wire 11 by covering the electric wire 11 around the insulator provided to fix the electric wire 11 to a power pole or the like. That is, for the purpose of protecting the electric wire, the electric wire 11 such as a high-voltage electric wire is used.
When fixing the wire to the insulator, the wire is attached to the wire 11 so as to cover the wire 11 in order to prevent damage to the wire 11 at the fixed portion, and a metal cable such as a copper wire is fixed around the wire protector 10. The member is wound and fixed to the electric wire 11.

The electric wire protector 10 is made of a flexible and resilient electrically insulating material, for example, polyethylene.
It is divided in the circumferential direction and is formed in a substantially cylindrical shape so that it can be expanded,
An electric wire insertion portion 20 formed to extend along the longitudinal direction of the electric wire protection device 10, a fitting portion 30 formed to be continuous with the electric wire insertion portion 20, and formed to extend along the longitudinal direction of the electric wire protection device 10. And the outer shape of the cross section is substantially elliptical.

The electric wire insertion portion 20 is provided with an electric wire 11 indicated by a virtual line.
And an electric wire insertion hole 21 through which the electric wire 11 is inserted when the electric wire 11 is attached to the electric wire 11 in order to protect the electric wire. That is, in a mounted state in which the wire protector 10 is mounted on the wire 11, the wire 11 is stored in the wire insertion hole 21 of the wire protector 10. The axis of the wire insertion hole 21 is housed in the wire insertion hole 21 in a natural state in which the wire protection device 10 is not subjected to a force to deform the wire protection device 10 and the wire protection device 10 is in a substantially linear state. It becomes substantially the same as the axis of the electric wire 11.

The fitting portion 30 has a first fitting portion 31 provided with a fitting ridge 33 formed to extend along the longitudinal direction of the wire protector 10 and a fitting that fits into the fitting ridge 33. Groove 3
4 having a second fitting portion 32. In the mounting state, the fitting ridge 33 and the fitting groove 34 are closely fitted to each other and fitted, and the mounting of the wire protector 10 to the wire 11 is achieved. The longitudinal direction of the wire protector 10 means the axial direction of the wire protector 10 in the natural state.

The cross-sectional shape of the fitting ridge 33 perpendicular to the axis of the wire protector 10 is such that when the fitting ridge 33 and the fitting groove 34 are fitted to each other, the fitting ridge 33 is fitted. An extending portion 37 extending from the first fitting base 36 having the inner surface 35 of the first fitting portion 31 facing the groove 34 in a direction approaching the fitting groove 34, and being wider than the extending portion 37. The fitting projection 38 is formed so as to have a cross-sectional shape that tapers toward the direction away from the extension 37. For example, the cross-sectional shape of the fitting ridge 33 is formed in a substantially arrowhead shape.

The fitting groove 34 is formed corresponding to the shape of the fitting ridge 33, and in the fitting state, the fitting ridge 33 is formed.
And the inner surface of the fitting concave groove 34 are formed so as to be in close contact with each other. The cross-sectional shape of the fitting groove 34 perpendicular to the axis of the wire protector 10 is such that the first fitting base 3
6 is formed on a second fitting base 39 having an inner surface of the second fitting portion 32 facing the second fitting base 32.

The first fitting portion 31 provided with the fitting ridge 33 and the second fitting portion 32 provided with the fitting groove 34 are made of a flexible and resilient electrically insulating material. The fitting ridge 33 and the fitting groove 34 also have flexibility and elasticity. In order to achieve the fitting state, a force is applied in a direction indicated by an arrow A in FIG. 3 to push the fitting ridge 33 into the fitting groove 34. Is deformed, and the fitting protrusion 38 is guided by the inner surface of the fitting groove 34 so that the fitting protrusion 3
3 is inserted into the fitting groove 34. When the fitting ridge 33 is completely inserted into the fitting groove 34, the deformed fitting protrusion 38 is restored to its shape before deformation by its elasticity. Fitting groove 34 of mating ridge 33
Is prevented from coming off, the surface of the fitting ridge 33 and the inner surface of the fitting groove 34 come into close contact, and the fitting between the fitting ridge 33 and the fitting groove 34 is achieved. Thus, the fitting ridge 33
By fitting the fitting groove 34 with the fitting concave groove 34, infiltration of rainwater or the like into the wire insertion hole 21 can be prevented, and the withstand voltage performance of the wire protector 10 can be improved.

To release the fitting state, the first fitting portion 31
By applying force to the first fitting portion 31 and the second fitting portion 32 in a direction in which the first fitting portion and the second fitting portion are separated from each other (a direction indicated by an arrow B in FIG. 3), the fitting projection 38 is formed. It is deformed so that the fitting ridge 33 is detached from the fitting groove 34.

As described above, the wire protector 10 can be easily mounted on the wire 11. After the wire protector 10 is mounted on the wire 11, the wire protector 10 is restored to a cylindrical shape and mounted on the wire 11. Therefore, even if the worker does not support the wire protector 10, the wire protector 10 does not separate from the wire 11 and fall. The operator can operate the fixing member with both hands to fix the electric wire 11 to the insulator via the electric wire protector 10. Therefore, only one worker can attach the wire protector 10 to the wire 11, thereby improving work efficiency and ensuring safety.

The specific size of the wire protector 10 is, for example, a length T1 in the height direction of 25 mm and a length T in the width direction.
2 is 16.8 mm, length T3 in the length direction is 1000 mm
And the diameter T4 of the electric wire insertion hole 21 is 11.8 mm. The shape and size of the wire protector 10 are appropriately changed depending on the diameter of the wire 11 to be mounted, the voltage used, and the like. As an example of the diameter of the electric wire 11, for example, 5 to 40 m
m, and an example of a working voltage transmitted to the electric wire 11 is 66
00V or less.

The projecting portion 40 is formed so that at least a part thereof is opposed to the electric wire insertion hole 21 and at least a part is disposed between the electric wire insertion hole 21 and the fitting groove 34. . The protruding portion 40 is formed so as to be continuous with the first fitting base portion 36, and is arranged so as to surround the electric wire 11 together with the electric wire insertion portion 20 in the mounted state. That is, in the vicinity of the outer periphery of the electric wire insertion hole 21 in which the electric wire 11 is stored,
The electric wire insertion portion 20 and the protruding portion 40 constitute a hollow circumferential portion.

The second fitting base 3 near the first fitting base 36 where the fitting ridge 33 is provided, and the second fitting base 3 where the fitting groove 34 is provided.
9 and the vicinity of the base where the protruding portion 40 is provided are formed thicker than the wire insertion portion 20. Therefore, the outer shape of the cross-section of the wire protector 10 can be substantially elliptical, and the outer shape of the cross-section of the wire protector 10 can be substantially elliptical, so that the fixing member is provided on the outer periphery of the wire protector 10. Even when the wire protector 10 is wound around and fixed to the wire 11, the fitting portions 30a and 30b are not displaced in directions away from each other and the fitting state is not released. In other words, since the outer shape of the cross section of the wire protector 10 is substantially elliptical, the fixing member is formed on the outer peripheral surface 15 of the wire protector 10.
Therefore, the force applied to the wire protector 10 from the fixing member is dispersed, and the fitting state is not released by the force applied to the wire protector 10 from the fixed member.

As described above, since the wire protector 10 has flexibility and elasticity, the wire protector 10 can be easily deformed when the wire protector 10 is attached to the electric wire 11, and the wire protector 10 can be easily deformed. The wire protector 10 attached to the wire 11 is restored to a cylindrical shape and fits the wire 11. The wire protector 10 is divided in the circumferential direction of the tubular wire protector 10 and is formed into a tubular shape so as to be expandable. Therefore, when the wire protector 10 is attached to the electric wire 11, the circumferential direction of the wire protector 10 is changed. The wire protector 10 is expanded at the dividing portion 25 where the wire 11 is cut off, and the wires 11 can be arranged and stored in the wire protector 10.

The wire protector 10 includes a
The fitting state is achieved by fitting the fitting ridge 33 and the fitting concave groove 34, and at least a part of the protruding part 40 is formed to face the wire insertion hole 21 when the protruding part 40 is in the mounted state. In addition, since at least a part of the protruding portion 40 is disposed between the wire insertion hole 21 and the fitting concave groove 34, the dividing portion 25 greatly affects the withstand voltage performance of the wire protector 10.
Can be set longer. That is, the creepage length L indicated by the solid line in FIG. 4 can be set as the creepage distance required to realize the withstand voltage performance required for the wire protector 10. In other words, the creepage distance can be set long, and electrical insulation that can sufficiently withstand high voltages can be achieved. In addition, by making the shape of the cut portions 25, which are portions that are cut in the circumferential direction of the wire protector 10, alternately enter the shape by the fitting ridges 33, the fitting grooves 34, and the protruding portions 40, the wire insertion can be performed. Infiltration of rainwater or the like into the hole 21 can be reliably prevented. Furthermore, since the outer shape of the cross section of the wire protector 10 is substantially elliptical, the splitting portion 25 does not expand due to the action of the force applied by the fixing member, and therefore seepage of rainwater or the like into the wire insertion hole 21. Can be reliably prevented.

[0023]

According to the present invention, since the wire protector has flexibility and elasticity, the wire protector can be easily deformed when the wire protector is attached to the wire, and the wire protector can be easily deformed. The wire protector attached to the wire is restored to a cylindrical shape and adapted to the wire. The wire protector is divided in the circumferential direction of the tubular wire protector and is formed into a tubular shape so that it can be expanded.Therefore, when the wire protector is attached to the wire, the part of the wire protector that is cut in the circumferential direction. In, the wire protector can be expanded to place the wire in the wire protector. The electric wire insertion portion is formed to extend along the longitudinal direction of the electric wire protector, and the electric wire insertion portion is provided with an electric wire insertion hole through which the electric wire is inserted in a state where the electric wire protection device is attached to the electric wire, so that the electric wire is stored in the electric wire insertion hole. be able to. The fitting portion formed to be continuous with the wire insertion portion is fitted to the first fitting portion having the fitting ridge formed extending along the longitudinal direction of the wire protector and the fitting ridge. Since the second fitting portion having the fitting groove is provided, the fitting ridge provided in the first fitting portion and the fitting groove provided in the second fitting portion are fitted. Thereby, it can be hermetically sealed at a location divided in the circumferential direction of the electric wire protector in which the electric wire is stored, thereby preventing rainwater or the like from seeping into the electric wire protector. At least a part of the protrusion formed to extend along the longitudinal direction of the wire protector is formed to face the wire insertion hole, and at least a part is disposed between the wire insertion hole and the fitting groove. Therefore, it is possible to set a longer creepage distance in the vicinity of the portion of the wire protector divided in the circumferential direction. Therefore, the withstand voltage performance of the wire protector can be improved. Since the outer shape of the cross section of the wire protector is substantially elliptical, the copper wire which is a fixing member wound around the outer periphery of the wire protector to fix the wire protector is in close contact with the outer surface of the fitting portion, The force applied to the wire protector in the direction in which the first fitting portion and the second fitting portion are detached due to the binding of the fixing member can be reduced.

Therefore, the wire protector can be easily mounted on the wire, and after the wire protector is mounted on the wire, the wire protector is restored to a cylindrical shape and mounted on the wire. Even if the worker does not support the wire protector, the wire protector does not drop off from the wire and the worker can operate the fixing member with both hands to fix the wire protector to the wire. Therefore, only one worker can attach the wire protector to the wire, thereby improving work efficiency and ensuring safety.

Further, according to the present invention, since the cross-sectional shape of the fitting ridge is substantially an arrowhead shape, the fitting between the fitting ridge and the fitting groove is reliably achieved, and the fitting ridge is formed. The fitting to the fitting groove is not easily disengaged, and the wire protector is securely attached to the wire. Even if the wire protector is not exposed to the wind and rain for a long time after being attached to the wire, the wire protector does not separate from the wire, and the fitting between the fitting ridge and the fitting groove is not released. Therefore, even after a long period of time, rainwater or the like does not infiltrate into the wire protector, and the withstand voltage performance does not deteriorate.

[Brief description of the drawings]

FIG. 1 is a perspective view of an electric wire protector 10 according to an embodiment of the present invention.

FIG. 2 is a left side view of the electric wire protector 10.

FIG. 3 is a left side view of the wire protector 10 in a state where a fitting portion is expanded.

FIG. 4 is a diagram for explaining an operation of a fitting portion 30 of the wire protector 10.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Electric wire protective tool 20 Electric wire insertion part 21 Electric wire insertion hole 30 Fitting part 31 First fitting part 32 Second fitting part 33 Fitting ridge 34 Fitting groove 40 Projecting part 36, 39 Base

Claims (2)

[Claims] 1. An electric wire protector made of an electrically insulating material having flexibility and elasticity, divided in a circumferential direction and formed in a substantially cylindrical shape so as to be expandable. An electric wire insertion portion formed along the longitudinal direction and having an electric wire insertion hole through which the electric wire is inserted when the electric wire is attached to the electric wire to protect the electric wire; Fitting having a first fitting portion provided with a fitting ridge formed to extend along the longitudinal direction of the tool and a second fitting portion provided with a fitting recess groove fitted in the fitting ridge. Part, and is formed extending along the longitudinal direction of the wire protector, at least a part is formed facing the wire insertion hole,
A wire protector having a projection at least partially disposed between the wire insertion hole and the fitting groove, and having a substantially elliptical outer cross-sectional shape. 2. The wire protector according to claim 1, wherein the cross-sectional shape of the fitting ridge is substantially an arrowhead shape.