JP2003259539A - Fitting portion for electric wire protecting tube - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fitting portion for an electric wire protecting tube capable of easily engaging both end portions in a circumferential direction of the fitting portion, and maintaining an engaging state of both parts even if an external force is applied with the fixing portion attached on an aerial wire. <P>SOLUTION: An internal insertion portion of one electric wire protective tube 1 is internally inserted into the fitting portion 2 of another electric wire protecting tube 1, and the respective tubes are connected in an axial direction. In the portion 2, a first engaging portion 12 is formed on one end 10 in the circumferential direction, and a second engaging portion 13 is formed on the other end 11 in the circumferential direction. By engaging the first and the second engaging portions 12, 13, both the ends 10, 11 can be closed. The first and the second portions 12, 13 are mutually engaged in a state where the end 10 is at a plurality of positions of the end 11, and can permit relative displacement of both the ends 10, 11 in an axial direction. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fitting portion of an electric wire protection tube, which has a structure for connecting the electric wire protection tubes when a plurality of electric wire protection tubes are attached to an overhead wire. Regarding the department.

In the present invention, the term "substantially parallel" includes "parallel" and the term "substantially vertical" includes "vertical".

[0003]

2. Description of the Related Art FIG. 19 is a perspective view showing a conventional wire protection tube connector 51. A wire protection tube is attached to the overhead wire to protect it. When a plurality of electric wire protection tubes are attached to the overhead wire, the electric wire protection tubes are connected to each other by the connecting tool 51.

The connector 51 has a pair of semi-cylindrical bodies 52 and 53 formed separately. Each semi-cylindrical body 52, 53 is
By sliding in the axial direction, they can be joined together in a cylindrical shape. Two coupling portions 54 and 55 are formed in the inner peripheral portion of the one half tubular body 52 at intervals in the axial direction.

With the semi-cylindrical bodies 52 and 53 joined together in a cylindrical shape, the semi-cylindrical bodies 52 and 53 are inserted into the connector 1 so that the ends of the two electric wire protection tubes are butted against each other. In this manner, the connecting portion of one electric wire protection tube and the one connecting portion 4 of the connecting tool 51 are connected, and the connecting portion of the other electric wire protection tube and the other connecting portion 55 of the connecting tool 51 are connected. . Thereby, the two wire protection tubes can be connected by the connecting tool 51.

In addition to the wire protection tube, the connector 51 must be slidably attached to the respective semi-cylindrical bodies 52 and 53 so as to be joined together. Moreover, the coalescing work is performed on each of the half cylinders 52, 53
Since the slide operation must be performed so as to engage the both ends in the circumferential direction, workability is poor.

FIG. 20 shows another conventional wire protection tube 6 of the prior art.
It is a perspective view which shows 0. FIG. 21 is a front view showing the fitting portion 61 of the electric wire protection tube 60. FIG. 22 is a side view of the fitting portion 61. As a configuration that improves workability during installation,
The fitting portion 61 having the first engaging portion 62 is formed at one end portion in the axial direction, and the insertion portion 64 having the second engaging portion 63 is formed at the other end portion in the axial direction. The insertion portion 64 of the other electric wire protection tube 60 is inserted into the fitting portion 61, and both ends of the fitting portion 61 in the circumferential direction can be locked by relatively approaching. , 67 forming a wire protection tube.

[0008]

In the fitting portion 61 of the electric wire protection tube 60 of the prior art, the locking portions 66 and 67 are structured so that they cannot be locked if the positions thereof shift in the axial direction. Such locking portions 66 and 67 are engaged with each other when an external force acts on the wire protection tube 60 and twists when the wire protection tube 60 is attached to an overhead wire using an inserter, for example. , 67 are displaced relative to each other in the axial direction, and the locking portions cannot be locked to each other. Therefore, workability at the time of mounting cannot be greatly improved. Further, even if the locking portions 66 and 67 can be locked to each other at the time of mounting, if an external force that causes twisting is applied after that,
The locked state of each locking portion 66, 67 is released.

An object of the present invention is to provide a fitting portion of an electric wire protection tube in which both ends in the circumferential direction can be easily locked to each other and high workability can be obtained at the time of mounting on an overhead wire. is there.

Another object of the present invention is to provide a fitting portion of an electric wire protection tube which can be held in a mutually locked state even when an external force acts on the overhead electric wire.

[0011]

The present invention according to claim 1 is made of an electrically insulating material having flexibility and elasticity, is divided in the circumferential direction, and is formed into a substantially cylindrical shape. A fitting portion having a first coupling portion is formed at one end in the direction,
A wire protection tube having an insertion portion having a second coupling portion formed at the other end in the axial direction, wherein when fitting a plurality of wire protection tubes to an overhead wire, the fitting portion of one wire protection tube The electric wire protection tube is configured such that the other electric wire protection tube is interpolated with the other electric wire protection tube, and in this state the first connection portion and the second connection portion are connected to each other so that the respective electric wire protection tubes can be connected in the axial direction. A first locking portion is formed at one end portion in the circumferential direction of the fitting portion,
A second locking portion is formed at the other end of the fitting portion in the circumferential direction,
The locking portion and the second locking portion are locked to each other so that both end portions in the circumferential direction of the fitting portion can be closed, and one end portion in the circumferential direction of the first and second locking portions is the other end portion in the circumferential direction. The electric wire protection tube fitting portion is characterized in that it can be locked to each other in a plurality of positions with respect to.

According to the present invention, a substantially tubular electric wire protection tube made of an electrically insulating material is attached to an overhead wire to protect the overhead wire. The wire protection tube has a fitting part and an insertion part formed at both ends in the axial direction, and when a plurality of wire protection tubes are attached to an overhead wire, the fitting part of one wire protection tube is The insertion portion of the wire protection tube is inserted, and the first connection portion and the second connection portion are connected in this insertion state, and the wire protection tubes are connected in the axial direction.

A first locking portion is formed at one end portion in the circumferential direction and a second locking portion is formed at the other end portion in the circumferential direction in the fitting portion of such a wire protection tube.
A locking portion is formed. By locking the first locking part and the second locking part, both ends in the circumferential direction of the fitting part can be closed, and in the fitting part with the wire protection tube attached to the overhead wire. Opening of both ends in the circumferential direction is prevented.

The first locking portion and the second locking portion can be locked to each other in a state where one end in the circumferential direction is at a plurality of positions with respect to the other end in the circumferential direction. As a result, when the wire protection tube is attached to the overhead wire, the degree of freedom in the relative position in the axial direction of the circumferential end portions of the fitting portion is increased when the circumferential end portions of the fitting portion are locked to each other. .

According to a second aspect of the present invention, the first and second aspects are provided.
The locking portions are characterized in that they can be displaced relative to each other in the axial direction while being locked with each other.

According to the present invention, the first locking portion and the second locking portion can be displaced relative to each other in the axial direction in the state of being locked with each other, so that the circumferential direction of the fitting portion is reduced. It is possible to allow both ends to be relatively displaced in the axial direction. As a result, when an external force is applied to both end portions in the circumferential direction of the fitting portion so as to be relatively displaced in the axial direction, a large external force acts on the first and second locking portions to release the mutual locking. This can be prevented, and the mutually locked state of the first and second locking portions can be maintained.

The present invention according to claim 3 is made of an electrically insulating material having flexibility and elasticity, is formed into a substantially cylindrical shape by being divided in the circumferential direction, and has a first end portion in the axial direction. 1
A wire protection tube in which a fitting section having a coupling section is formed and an insertion section having a second coupling section is formed at the other end in the axial direction, and when a plurality of wire protection tubes are mounted on an overhead wire ,
The insertion portion of the other wire protection tube is inserted into the fitting portion of one of the wire protection tubes, and in this state, the first connection portion and the second connection portion are connected, and each wire protection tube is axially moved. A fitting portion of an electric wire protection tube configured to be connectable, wherein a first locking portion is formed at one end portion in the circumferential direction of the fitting portion, and a second engagement portion is formed at the other end portion in the circumferential direction of the fitting portion. A stopper is formed, the first locking portion and the second locking portion are locked, and both ends in the circumferential direction of the fitting portion can be closed.
The first and second locking portions are electric wire protection tube fitting portions which are relatively displaceable in the axial direction in a state of being locked with each other.

According to the present invention, a substantially tubular electric wire protection tube made of an electrically insulating material is attached to an overhead wire to protect the overhead wire. The wire protection tube has a fitting part and an insertion part formed at both ends in the axial direction, and when a plurality of wire protection tubes are attached to an overhead wire, the fitting part of one wire protection tube is The insertion portion of the wire protection tube is inserted, and the first connection portion and the second connection portion are connected in this insertion state, and the wire protection tubes are connected in the axial direction.

A first locking portion is formed at one end portion in the circumferential direction and a second locking portion is formed at the other end portion in the circumferential direction in the fitting portion of such a wire protection tube.
A locking portion is formed. By locking the first locking part and the second locking part, both ends in the circumferential direction of the fitting part can be closed, and in the fitting part with the wire protection tube attached to the overhead wire. Opening of both ends in the circumferential direction is prevented.

Since the first locking portion and the second locking portion can be displaced relative to each other in the axial direction while being locked with each other, both circumferential end portions of the fitting portion are axially displaced. It is possible to allow relative displacement. As a result, when an external force is applied to both end portions in the circumferential direction of the fitting portion so as to be relatively displaced in the axial direction, a large external force acts on the first and second locking portions to release the mutual locking. This can be prevented, and the mutually locked state of the first and second locking portions can be maintained.

[0021]

1 is a perspective view showing a fitting portion 2 of an electric wire protection tube 1 according to an embodiment of the present invention. Figure 2
FIG. 3 is a perspective view showing the wire protection tube 1. Electric wire protection tube 1
Is attached to the overhead wire 3 and is used to protect the overhead wire 3. A plurality of electric wire protection tubes 1 are attached to the overhead electric wire 3 and are used by being connected to each other. The electric wire protection tubes 1 have the same configuration as each other.

The electric wire protection tube 1 is made of an electrically insulating material having flexibility and elasticity, such as polyethylene, is divided in the circumferential direction and is formed into a substantially cylindrical shape, and both ends in the circumferential direction are opened. The overhead wire 3 can be inserted into the overhead wire 3 and attached to the overhead wire 3 in a state of covering the overhead wire 3 so as to surround it.

The first end of the wire protection tube 1 in the axial direction is provided with a first
The fitting portion 2 having the coupling portion 4 is formed, and the insertion portion 6 having the second coupling portion 5 is formed at the other end portion in the axial direction. The fitting portion 2 and the insertion portion 6 may be integrally formed with an axially intermediate portion between them, or may be separately formed and assembled. In this embodiment, they are integrally molded.

This electric wire protection tube 1 includes a plurality of electric wire protection tubes 1.
When the cable is attached to the overhead wire 3, the fitting portion 2 of the one wire protection tube 1 is inserted with the insertion portion 6 of the other wire protection tube 1.
In this insertion state, the first connecting portion 4 and the second connecting portion 5 are connected to each other, and the electric wire protection tubes 1 are connected in the axial direction with the overhead electric wires 3 inserted.

The first coupling portion 4 is realized by forming a groove-shaped coupling hole which is concave in the inner peripheral portion of the fitting portion 2 and extends in the circumferential direction. 5
Is realized by a ridge formed on the insertion portion 5 so as to project outward and extend in the circumferential direction. The first and second coupling portions 4 and 5 are maintained in the coupled state when the circumferential ends 10 and 11 of the fitting portion 2 are closed and the fitting portion 2 is closed.

The first and second connecting portions 4 and 5 are opened artificially, that is, by the intention of the operator, by opening both end portions 10 and 11 in the circumferential direction of the fitting portion 2 and opening the fitting portion 2. , The first and second coupling parts 4 and 5 can be decoupled. If the connection between the first and second connecting portions 4 and 5 is released, the connection between the wire protection tubes 1 can be released.

FIG. 3 is a perspective view showing the fitting portion 2 viewed from a direction different from that in FIG. FIG. 4 is a front view of the fitting portion 2 as viewed from diagonally above and to the right of FIG. FIG. 5 is a side view of the fitting portion 2 as viewed from the left side of FIG. FIG. 6 shows FIG.
FIG. 6 is a cross-sectional view showing the right side of FIG. FIG. 7 is a plan view shown from above in FIG. FIG. 8 is a bottom view shown from below in FIG. 4. FIG. 9 is a rear view of the sheet of FIG. 4 viewed from the back side. FIG. 10 is a cross-sectional view taken along the section line S10-S10 of FIG. FIG. 11 shows
It is sectional drawing shown from the cutting plane line S11-S11 of FIG. FIG. 12 is a cross-sectional view taken along the section line S12-S12 of FIG. FIG. 13 is an enlarged cross-sectional view showing both circumferential end portions 10 and 11 of the fitting portion 2.

Referring to FIGS. 1 and 2 together, a first locking portion 12 is formed at one end 10 in the circumferential direction of the fitting portion 2,
A second locking portion 13 is formed on the other end 11 in the circumferential direction of the fitting portion 2. A circumferential wall 14 which is a circumferential intermediate portion between the circumferential end portions 10 and 11 of the fitting portion 2 is formed in a substantially C shape along a virtual substantially cylindrical surface, and is fitted from both circumferential end portions of the circumferential wall 14. Both ends 10 and 11 in the circumferential direction of the portion 2 are formed so as to project outward.

Both ends 10 and 11 in the circumferential direction of the fitting hole 2 are formed so as to face each other, and the first locking portion 12 and the second locking portion 13 can be locked to each other. By engaging the first and second engaging portions 12 and 13 with each other, the fitting portion 2
It is possible to close both circumferential ends 10, 11.

The first end portion 10 in the circumferential direction has a flat plate-like first leg portion 1 protruding outward from one end portion in the circumferential direction of the peripheral wall 14.
5 and the first locking portion 12 are formed. At the other end in the circumferential direction, a flat plate-shaped second leg 16 protruding outward from the other end in the circumferential direction of the circumferential wall 14 and a second locking portion 13 are formed. The first and second legs 15 and 16 face each other so as to be substantially parallel to each other. The first locking portion 12 projects from the first leg portion 15 toward the second leg portion 16, and the second locking portion 13 projects from the second leg portion 16 toward the first leg portion 15. .

The first locking portion 12 is provided with two locking pieces 17, 18 which are provided at intervals in the direction in which the first leg portion 15 extends, that is, in the radial direction of the fitting portion 2 inward and outward.
Have. Each of the locking pieces 17 and 18 extends in the axial direction, and the shape of the cross section perpendicular to the axial direction is uniform in the axial direction. Therefore, the first locking portion 12 extends in the axial direction,
The shape of the cross section perpendicular to the axial direction is uniform in the axial direction.

One of the locking pieces 17 is a flat plate-shaped ridge which is disposed on the inner side of the fitting portion 2 and which projects substantially vertically from the first leg portion 15 toward the second leg portion 16. . The other locking piece 1
Numeral 8 is disposed on the outer side of the fitting portion 2 and on the outer side of the one locking piece 17, and projects substantially vertically from the first leg portion 15 toward the second leg portion 16. The other locking piece 18 includes a flat plate-shaped base portion 19 arranged substantially parallel to the one locking piece 17,
It has a hook portion 20 which is formed at the tip end portion of the base portion 19 and protrudes toward the inner side of the fitting portion 2, that is, one side in the thickness direction of the base portion 19 which is one locking piece 17 side.

The hook portion 20 of the other locking piece 18 is a guide surface that inclines toward the outside of the fitting portion 2, that is, in the direction away from the first locking piece 17 as it moves away from the first leg portion 15. 21 and is formed in a taper shape as it goes away from the first leg portion 15. The hook portion 2 of the other locking piece 18
The portion 22 near the base portion 19 of 0 is flat and
It is formed to be slightly inclined so as to approach the first leg portion 15 as it approaches the locking piece 17.

The second locking portion 13 extends in the axial direction, and the shape of the cross section perpendicular to the axial direction is uniform in the axial direction. The second locking portion 13 projects substantially vertically from the second leg portion 16 toward the first leg portion 15. Further, the second locking portion 13 includes a flat plate-shaped base portion 25 and a hook portion 26 formed on the tip end portion of the base portion 25 and protruding to one side in the thickness direction of the base portion 25 which is the outer side of the fitting portion 2. Have.

The second engaging portion hook portion 26 has a guide surface 27 that is inclined toward the inner side of the fitting portion 2 as it approaches the tip, that is, as it moves away from the second leg portion 16, The tapered shape is formed as the distance from the leg portion 16 increases.
Further, the portion 2 of the hook portion 26 of the second locking portion 13 near the base portion 25
Reference numeral 8 is a flat surface and is formed to be slightly inclined so as to approach the first leg portion 15 as it approaches the first locking piece 17.

When the external force is not applied to the first locking portion 12 and the second locking portion and the locking is released, as shown by the solid line in FIG. Hook part 2
The guide surfaces 21 and 27 of 0 and 26 are in contact with or opposite to each other. From this state, the first and second legs 15 and 16
By relatively applying, in other words, by applying an external force so as to bring both end portions 10 and 11 in the circumferential direction closer to each other, the guide surfaces 21 and 27 guide the first and second locking portions 12 and 13 to each other. As shown by phantom lines in FIG. 13, portions 22 and 28 near the base of the hooks 20 and 26 are provided.
So that they contact or face each other, the second locking portion 13 is fitted between the locking pieces 17 and 18 of the first locking portion 12, and the first and second locking portions 12 and 13 are They are locked together. By locking the first and second locking portions 12 and 13 in this manner, both circumferential direction end portions 10 and 11 can be closed.

In this locked state, the second locking portion 13 is sandwiched between the locking pieces 17 and 18, and if an external force is simply applied in the direction of moving the circumferential end portions 10 and 11 away from each other, The locked state cannot be released. Moreover, each hook 20,
The portions 22 and 26 near the base of 26 are formed in the inclined state as described above, and when an external force is applied in a direction of moving the circumferential end portions 10 and 11 away from each other, the external force causes the first locking portion 12 to move.
The other locking piece 18 and the second locking portion 13 work in a direction to bring them closer to each other, and the locked state is reliably held, and both circumferential end portions 1
The blocked state of 0 and 11 is retained. Therefore, by connecting the wire protection tubes 1 to each other in the axial direction and locking the first and second locking portions 12 and 13,
The connected state of can be maintained.

The first and second locking portions 12 and 13 are artificially, that is, according to the intention of the operator, the first locking portion 12.
Of each of the locking pieces 17 and 18 of
The locked state can be released by operating so as to pass the second locking portion 13 between them.

Thus, the first and second locking portions 12, 1
3 can be locked to each other by a simple operation of sandwiching the both end portions 10 and 11 in the circumferential direction from both sides and simply applying an external force so as to bring them closer to each other. Therefore, the first and second locking portions 12 and 13 can be easily engaged not only in the manual work of the worker but also in the indirect construction method using an operation tool called an insulating paw and the construction method using a manipulator. You can stop.

Further, the first and second locking portions 12, 13
Is a cross-sectional shape that extends in the axial direction and is perpendicular to the axial direction.
It is formed uniformly in the axial direction. As a result, the first and second locking portions 12 and 13 are not restricted in the axial direction with respect to the mutually lockable positions, and the first locking portion 12 is relative to the second locking portion 11. , Can be locked to each other in a plurality of continuous positions in the axial direction. That is, the first and second locking portions 12, 13
Can be locked to each other in a state in which one end 10 in the circumferential direction is at a plurality of positions with respect to the other end 11 in the circumferential direction. Further, the first and second locking portions 12 and 13 as described above are relatively displaceable in the axial direction while being locked to each other.

According to the wire protection tube 1 of the present embodiment, the both ends of the fitting portion 2 in the circumferential direction are closed by locking the first locking portion 12 and the second locking portion 13. With the electric wire protection tube 1 attached to the overhead wire 3, it is possible to prevent the circumferential end portions 10 and 11 of the fitting portion 2 from being opened, and to prevent the electric wire protection tube 1 from being disconnected. In addition, the wire protection tube 1 is prevented from falling off the overhead wire 3.

When a plurality of electric wire protection tubes 1 are attached to the overhead electric wire 3, in order to connect the electric wire protection tubes 1 in the axial direction and close both circumferential end portions 10 and 11 of the fitting portion 2,
When locking the first and second locking portions 12 and 13, as described above, the first and second locking portions 12 and 13 can be operated by a simple operation of bringing the both end portions 10 and 11 in the circumferential direction relatively close to each other. 1
3 can be locked. Moreover, as described above, the first and second locking portions 12 and 13 can be locked when the relative positions in the axial direction are continuous plural positions,
Can be locked to each other. Thus, the first and second locking portions 1
First and second locking portions 1 capable of locking 2 and 13 with each other
The degree of freedom in the relative position of the axial direction of the Nos. 2 and 13, that is, the relative position of the both ends 10 and 11 in the circumferential direction with respect to the axial direction becomes high.

As a result, when the wire protection tube 1 is attached to the overhead wire 3, an external force acts on the wire protection tube 1 so that both circumferential end portions 10 and 11 of the fitting portion 2 are in a natural state where no external force is applied. Even if the first and second locking portions 12 and 13 are locked relative to each other, the both end portions 1 in the circumferential direction are locked.
0, 11 can be closed. Therefore, even if the relative displacement from the natural state as described above occurs, it is not necessary for the operator to correct and return the relative displacement, and simply grasp both circumferential end portions and bring them closer to each other. The second locking pieces 12 and 13 can be locked, and the work is easy. In particular, instead of a method in which an operator directly grasps and operates the wire protection tube 1, a method in which the operator operates the wire protection tube using an operation tool called an insulating armor and a robot called a manipulator The operating method can significantly improve the work efficiency. Of course, the work efficiency can be improved even in the construction method in which the operator directly grasps and operates the wire protection tube.

When a plurality of wire protection tubes 1 are mounted on the overhead wire 3, a device called an inserter for continuously mounting each wire protection tube 1 may be used. When this inserter is used, the wire protective tube 1 may be twisted around the axis due to the axial compressive force applied to the wire protective tube 1 by the inserter. In this case, the axial end portions 10 and 11 of the fitting portion 2 are relatively displaced in the axial direction from the natural state, but even in this state, the engagement between the first and second locking portions 12 and 13 is as described above. It is easy to stop work and is suitable even when using such an insertion machine.

According to the wire protection tube 1, the first locking portion 1
2 and the second locking portion 13 can be displaced relative to each other in the axial direction while being locked to each other, so that both circumferential end portions 10 and 11 of the fitting portion 2 are relatively displaced in the axial direction. Can be allowed to displace. As a result, when the wire protection tube 1 is attached to the overhead wire 3, when the circumferential end portions 10 of the fitting portion 2 receive an external force that relatively displaces in the axial direction, the relative displacement is allowed. Thus, the external force is prevented from acting so as to spread the locking pieces 17 and 18 to each other, and the first and second locking portions 12 and 13 are prevented.
In addition, it is possible to prevent a large external force from being released from mutual engagement, and it is possible to maintain the mutually engaged state of the first and second engaging portions 12 and 13.

As a result, even if an external force acts on the wire protection tube 1 such that the circumferential end portions 10 of the fitting portion 2 are relatively displaced in the axial direction, the circumferential end portions 2 of the fitting portion 2 are opened. Can be prevented. Therefore, it is possible to prevent the connection of each wire protection tube 1 from being released, and it is possible to prevent the wire protection tube from dropping from the overhead wire.

For example, overhead wires on sloping ground such as mountains,
When the electric wire protection tube 1 is attached to the overhead electric wire 3 which is provided in a state of being inclined with respect to the horizontal line, the electric wire protection tube 1
When the compressive force acts in the axial direction due to its own weight, the electric wire protection tube 1 may be twisted around the axial line. In this case, both ends 10 in the axial direction of the fitting portion 2,
Although 11 is displaced relative to the axial direction from the natural state, the wire protection tube 1 allows relative displacement in the axial direction of the circumferential end portions 10 and 11 of the fitting portion 2 due to the twist as described above. Since it is possible to maintain the mutual locked state of the first and second locking portions 12 and 13,
It is possible to prevent both end portions 2 in the circumferential direction of the fitting portion 2 from opening. Therefore, it is possible to prevent mutual disconnection and disconnection of the wire protection tubes 1 provided under such adverse conditions, which is preferable.

FIG. 14 shows both ends 10, 1 in the circumferential direction of the fitting portion 2a in the electric wire protection tube 1a according to another embodiment of the present invention.
It is sectional drawing which shows 1. The fitting portion 2a of the present embodiment is
The fitting portion 2 is similar to the fitting portion 2 shown in FIGS. 1 to 13. Corresponding portions are designated by the same reference numerals, only different configurations will be described, and description of similar configurations will be omitted.

In the fitting portion 2a of the present embodiment, the other locking piece 18 of the first locking portion 12 is the base portion 1 of the hook portion 20.
A projection 30 protruding toward the base 19 is formed at the end farthest from 9. In addition, the second locking portion 13 is formed with a protrusion 31 protruding toward the base portion 25 side at an end portion of the hook portion 26 farthest from the base portion 25. Other configurations are shown in FIGS.
This is the same as the third embodiment.

In such a fitting portion 2a, as shown by phantom lines in FIG. 14, the hook portions 20, 26 of the hook portions 20, 26 are locked with the first and second locking portions 12, 13 mutually locked. Each protrusion 3
0 and 31 are projections 30 and 31 of the other party and bases 19 and 25
It fits in the recess between. Thereby, the fitting portion 2a
1 can achieve the same effect as that of the embodiment shown in FIGS. 1 to 13, and in addition, even if an external force acts to relatively separate the circumferential end portions 10 and 11 from each other, The locked state of the stoppers 12 and 13 can be reliably retained.

FIG. 15 shows both ends 1 in the circumferential direction of the fitting portion 2b in the electric wire protection tube 1b according to still another embodiment of the present invention.
It is sectional drawing which shows 0 and 11. Fitting part 2 of the present embodiment
b is similar to the fitting part 2 shown in FIGS. 1 to 13, corresponding parts are denoted by the same reference numerals, only different configurations will be described, and description of similar configurations will be omitted.

In the fitting portion 2b of this embodiment, the first and second locking portions 12 and 13 are the first and second locking portions 12 and 13 of the fitting portion 2 shown in FIGS. And the locking portions 12 and 13 are formed symmetrically. That is, the first locking portion 1
2, the position of each locking piece 17, 18, the protruding direction of each hook portion 20, 26, and the guide surface 2 in each hook portion 20, 26.
1, 27 and the portions 22 and 28 near the base are inclined in opposite directions. Other configurations are similar to those of the embodiment shown in FIGS. Such a fitting portion 2b is shown in FIGS.
The same effect as the embodiment shown in FIG. 13 can be achieved.

FIG. 16 shows both end portions 1 in the circumferential direction of the fitting portion 2c in the electric wire protection tube 1c according to still another embodiment of the present invention.
It is sectional drawing which shows 0 and 11. Fitting part 2 of the present embodiment
c is similar to the fitting part 2b shown in FIG. 15, corresponding parts are denoted by the same reference numerals, only different configurations will be described, and description of similar configurations will be omitted.

In the fitting portion 2c of the present embodiment, in addition to the configuration of FIG. 15, projections 30 and 31 similar to those of the embodiment shown in FIG. 14 are formed. That is, in the other locking piece 18 of the first locking portion 12, the protrusion 30 protruding toward the base portion 19 is formed at the end of the hook portion 20 farthest from the base portion 19. In addition, the second locking portion 13 has a projection 31 protruding toward the base 25 side at the end of the hook 26 farthest from the base 25.
Is formed. Other configurations are similar to those of the embodiment shown in FIGS.

Such a fitting portion 2c can achieve the effect of the embodiment shown in FIGS. 1 to 13 and, in addition, the effect of forming the projections 30 and 31, that is, FIG. The same effects as those of the embodiment can be achieved together.

FIG. 17 shows both end portions 1 in the circumferential direction of the fitting portion 2d in the electric wire protection tube 1d according to still another embodiment of the present invention.
It is sectional drawing which shows 0 and 11. Fitting part 2 of the present embodiment
d is similar to the fitting portion 2 shown in FIGS. 1 to 13, corresponding portions are denoted by the same reference numerals, only different configurations will be described, and description of similar configurations will be omitted.

In the embodiment of FIGS. 1 to 13, one of the locking pieces 17 of the first locking portion 12 is formed in a flat plate shape, but in the fitting portion 2d of the present embodiment, Locking part 12
One of the locking pieces 17 is formed in a shape symmetrical with the other locking piece 18. To facilitate understanding, the same reference numerals are given to portions of the one locking piece 17 corresponding to the other locking piece 18.

In the embodiment shown in FIGS. 1 to 13, the second engaging portion 13 is formed with the hook portion 26 projecting only on one side in the thickness direction of the base portion 25, but the fitting portion 2d of the present embodiment is formed.
Then, the hook portions 26 that project symmetrically on both sides in the thickness direction are formed. That is, the hook portion 2 of the second locking portion 13 of the present embodiment
6 also projects to the other side in the thickness direction of the base portion 25.

The base portion 2 of the hook portion 26 of the second locking portion 13
5 has a similar structure to the hook portion 26 of the second locking portion 13 in the embodiment of FIGS. 1 to 13, and corresponds to the embodiment of FIGS. 1 to 13. The same reference numerals are given to the parts to be performed. Further, a portion of the hook portion 26 of the second locking portion 13 that projects to one side in the thickness direction of the base portion 25 and a portion of the hook portion 26 of the second locking portion 13 that projects to the other side in the thickness direction of the base portion 25 are: It is symmetrical. To facilitate understanding, the base portion 25 of the hook portion 26 of the second locking portion 13
The second locking portion 13 is provided at a portion protruding to the other side in the thickness direction of the
The same reference numeral is given to the portion of the hook portion 26 that projects to one side in the thickness direction of the base portion 25. Other configurations are the same as those of the embodiment shown in FIGS.

As a result, the fitting portion 2d is moved to the position shown in FIGS.
The effect similar to that of the embodiment shown in FIG. 3 can be achieved, and in addition, since the first and second locking portions 12 and 13 are locked to each other at two places, the locking strength can be increased. You can
Even if an external force acts to move the circumferential end portions 10 and 11 relatively away from each other, the locked state of the first and second locking portions 12 and 13 can be reliably retained.

FIG. 18 shows both ends 1 in the circumferential direction of the fitting portion 2e in the electric wire protection tube 1e according to still another embodiment of the present invention.
It is sectional drawing which shows 0 and 11. Fitting part 2 of the present embodiment
e is similar to the fitting portion 2d shown in FIG. 17, corresponding parts are denoted by the same reference numerals, only different configurations will be described, and description of similar configurations will be omitted.

In the fitting portion 2e of the present embodiment, in addition to the configuration of FIG. 17, projections 30 and 31 similar to those of the embodiment shown in FIG. 14 are formed. In other words, the locking pieces 17 and 18 of the first locking portion 12 have the protrusions 30 protruding toward the base 19 side at the ends of the hooks 20 that are farthest from the base 19. Further, the second locking portion 13 is provided with the hook portion 26.
The protrusions 31 projecting toward the base portion 25 are formed at the ends farthest from the base portion 25. Other configurations are
This is similar to the embodiment of FIG.

Such a fitting portion 2e can achieve the effects of the embodiment shown in FIG. 17, and in addition,
The effect of forming the projections 30 and 31, that is, the same effect as that of the embodiment of FIG. 14 can be achieved together.

The above embodiments are merely examples of the present invention, and the present invention is not limited to the above embodiments. Therefore, the configuration, for example, the shape and the material can be changed within the scope of the present invention. For example, the wire protection tube 1 may be made of other material such as polypropylene instead of polyethylene, and the first and second engaging portions 4 and 5 and the first and second locking pieces 12 and 1 may be used.
Two or more 3 may be formed, respectively. Further, the first and second locking portions 12 and 13 do not necessarily have to have a uniform cross-sectional shape in the axial direction, and for example, have a shape including a plurality of portions formed at intervals in the axial direction. It may be.

[0065]

According to the first aspect of the present invention, by engaging the first locking portion and the second locking portion formed in the fitting portion, both circumferential end portions of the fitting portion are locked. It is possible to prevent the opening of both ends of the fitting portion in the circumferential direction in the state where the wire protection tube is attached to the overhead wire. When the electric wire protection tube is attached to the overhead wire, the first and second locking portions are locked to each other so as to close both circumferential end portions of the fitting portion. The degree of freedom of the relative position with respect to the axial direction of is increased.

As a result, when the wire protection tube is attached to the overhead wire, an external force acts on the wire protection tube, and both end portions in the circumferential direction of the fitting portion are relatively displaced from the natural state in which no external force acts. However, the first and second locking portions can be locked to each other. Therefore, even if the relative displacement from the natural state as described above occurs, it is not necessary for the operator to correct and return the relative displacement, and the work is easy.
In particular, instead of a method in which an operator directly grasps and operates the wire protection tube, a method in which the operator operates the wire protection tube using an operating tool called an insulating wire and a robot called a manipulator is used to operate the wire protection tube. With this construction method, work efficiency can be significantly improved. Of course, the work efficiency can be improved even in the construction method in which the operator directly grasps and operates the wire protection tube.

According to the second aspect of the present invention, in the state where the wire protection tube is attached to the overhead wire, an external force is applied so that both ends of the fitting portion in the circumferential direction are relatively displaced in the axial direction. At this time, it is possible to prevent a large external force from being released from the mutual engagement from being exerted on the first and second engagement portions, and to maintain the mutually engaged state of the first and second engagement portions. it can. Therefore, even if an external force acts on the wire protection tube, it is possible to prevent the connection of each wire protection tube from being released, and it is possible to prevent the wire protection tube from dropping from the overhead wire.

According to the third aspect of the present invention, both ends in the circumferential direction of the fitting portion are closed by locking the first locking portion and the second locking portion formed in the fitting portion. It is possible to prevent the both ends of the fitting portion in the circumferential direction from being opened while the electric wire protection tube is attached to the overhead wire. When the wire protection tube is attached to the overhead wire, and when an external force such that both circumferential end portions of the fitting portion are displaced relatively in the axial direction is received, the first and second locking portions are mutually A large external force that would release the lock is prevented,
The mutual locked state of the second locking portion and the second locking portion can be maintained. Therefore, even if an external force acts on the wire protection tube, it is possible to prevent the connection of each wire protection tube from being released, and it is possible to prevent the wire protection tube from dropping from the overhead wire.

[Brief description of drawings]

FIG. 1 is a perspective view showing a fitting portion 2 of an electric wire protection tube 1 according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a wire protection tube 1.

FIG. 3 is a perspective view showing a fitting portion 2 as seen from a direction different from that in FIG.

FIG. 4 is a front view of a fitting portion 2 as seen from diagonally above and to the right of FIG.

5 is a side view of the fitting portion 2 as viewed from the left side of FIG.

FIG. 6 is a cross-sectional view seen from the right side of FIG.

FIG. 7 is a plan view seen from above in FIG.

FIG. 8 is a bottom view shown from below in FIG. 4;

9 is a rear view of the sheet of FIG. 4 viewed from the back side.

10 is a cross-sectional view taken along the section line S10-S10 of FIG.

11 is a cross-sectional view as seen from the section line S11-S11 in FIG. 7.

FIG. 12 is a cross-sectional view taken along section line S12-S12 of FIG.

13 is an enlarged cross-sectional view showing both circumferential end portions 10 and 11 of the fitting portion 2. FIG.

FIG. 14 is a cross-sectional view showing both circumferential end portions 10 and 11 of a fitting portion 2a of an electric wire protection tube 1a according to another embodiment of the present invention.

FIG. 15 is a cross-sectional view showing both circumferential end portions 10 and 11 of a fitting portion 2b of an electric wire protection tube 1b according to still another embodiment of the present invention.

FIG. 16 is a cross-sectional view showing both circumferential end portions 10 and 11 of a fitting portion 2c of an electric wire protection tube 1c according to still another embodiment of the present invention.

FIG. 17 is a cross-sectional view showing both circumferential end portions 10 and 11 of a fitting portion 2c of an electric wire protection tube 1c according to still another embodiment of the present invention.

FIG. 18 is a cross-sectional view showing both circumferential end portions 10 and 11 of a fitting portion 2c in an electric wire protection tube 1c according to still another embodiment of the present invention.

FIG. 19 is a perspective view showing a connector 51 of a conventional wire protection tube.

FIG. 20 is a perspective view showing another conventional electric wire protection tube 60.

FIG. 21 is a front view showing a fitting portion 61 of the wire protection tube 60.

22 is a side view of the fitting portion 61. FIG.

[Explanation of symbols]

1 Electric wire protection tube 2 Fitting part 3 overhead wire 4 first joint 5 Second joint 6 Interpolator 10 One end of fitting part in the circumferential direction 11 the other end in the circumferential direction of the fitting part 12 First locking part 13 Second locking part 17,18 Locking piece 19,25 base 20,26 Hook 21,27 guideway 22,28 parts near the base 30,31 Protrusion

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takayuki Tachibana             Chugoku Electric Power 4-33 Komachi, Naka-ku, Hiroshima City, Hiroshima Prefecture             Within the corporation (72) Inventor Kenji Murokawa             Chugoku Electric Power 4-33 Komachi, Naka-ku, Hiroshima City, Hiroshima Prefecture             Within the corporation (72) Inventor Ryota Katahira             Chugoku Electric Power 4-33 Komachi, Naka-ku, Hiroshima City, Hiroshima Prefecture             Within the corporation (72) Inventor Koji Hashiwatari             Chugoku Electric Power 4-33 Komachi, Naka-ku, Hiroshima City, Hiroshima Prefecture             Within the corporation (72) Inventor Koichi Inoue             Osaka Prefecture Osaka City Nishi-ku Selling Moat 4-5-21             Within Yotsugi Co., Ltd. F term (reference) 5G367 BB04

Claims (3)

[Claims] 1. A fitting which is made of an electrically insulating material having flexibility and elasticity, is formed into a substantially cylindrical shape by being divided in a circumferential direction, and has a first coupling portion at one axial end thereof. A wire protection tube in which a portion is formed and an insertion portion having a second coupling portion is formed at the other end in the axial direction, and when a plurality of wire protection tubes are attached to an overhead wire, one wire protection The insertion portion of the other electric wire protection tube is inserted into the fitting portion of the pipe, and in this state, the first connection portion and the second connection portion are connected to each other so that the respective electric wire protection tubes can be connected in the axial direction. A fitting portion of the wire protection tube, wherein a first locking portion is formed at one end portion in the circumferential direction of the fitting portion, and a second locking portion is formed at the other end portion in the circumferential direction of the fitting portion. The first locking portion and the second locking portion are locked so that both ends of the fitting portion in the circumferential direction can be closed, and the first and second locking portions include one end in the circumferential direction. In the presence in a plurality of positions with respect to the circumferential direction other end portion, the wire protection tube fitting portion, characterized in that mutually are engageable. 2. The wire protection tube fitting portion according to claim 1, wherein the first and second locking portions are relatively displaceable in the axial direction in a state of being locked with each other. . 3. A fitting which is made of an electrically insulating material having flexibility and elasticity, is formed into a substantially cylindrical shape by being divided in the circumferential direction, and has a first coupling portion at one end in the axial direction. Is a wire protection tube in which a portion is formed and an insertion portion having a second coupling portion is formed at the other end in the axial direction, and when a plurality of wire protection tubes are attached to an overhead wire, one wire protection tube The insertion portion of the other electric wire protection tube is inserted into the fitting portion of, and the first connection portion and the second connection portion are connected in this state, so that the electric wire protection tubes can be connected in the axial direction. A fitting portion of the wire protection tube, wherein a first locking portion is formed at one end portion in the circumferential direction of the fitting portion, and a second locking portion is formed at the other end portion in the circumferential direction of the fitting portion. The first locking portion and the second locking portion are locked to each other so that both end portions in the circumferential direction of the fitting portion can be closed, and the first and second locking portions are locked to each other. Wire protection tube fitting portion, wherein the state, in the axial direction can be relatively displaced.