JP6750853B2 - Tool for removing protective tube - Google Patents

Description

TECHNICAL FIELD The present invention relates to a protective tube removing tool that simply and quickly performs remote control to separate connection between protective tubes and to separate protective tube from an electric wire.

When working near electric wires installed on electric poles, insulate the outer circumference of the electric wires to prevent workers or working equipment from touching the electric wires and to protect the electric wires near trees. Covered by a protective tube of wood.

In general, this protective tube is formed of a flexible resin material and has a fin-shaped opening/closing portion in the longitudinal direction. When performing attachment/detachment work for the electric wire, it is necessary to open/close the opening/closing part to take in/out the electric wire.

FIG. 9: is a figure explaining the conventional work which removes a protective tube from an electric wire. For this work, a special yatco that allows one of the jaws to be inserted into the fin-shaped opening/closing part is used.

First, as shown in FIG. 9A, the hook 104 attached to the tip of the operating rod 102 having an insulating property is hooked on the upper surface of the protective tube 101 attached to the electric wire 100 and pressed. Subsequently, as shown in FIG. 9B, one of the jaws 103a and 103b of the yatco 103 that can be inserted into the fin-shaped opening/closing portion 101a of the protective tube 101 is inserted into the opening/closing portion 101a. .. Subsequently, as shown in FIG. 9C, the protection tube 101 is gripped by the other jaw 103b while the one jaw 103a is inserted. Subsequently, as shown in FIG. 9D, the pressing position by the hook 104 is slid from the upper surface position of the protective tube 101 to the position where the electric wire 100 is directly touched. Then, as shown in FIG. 9E, while holding the electric wire 100 with the hook 104, the protective tube 101 grasped by the yatco 103 is moved upward and removed from the electric wire 100.

According to the procedure as described above, it is possible to remove the protective tube from the electric wire by using a simple wearing tool. Such a technique is disclosed in Patent Document 1.

JP, 2009-219326, A

The best way to pull the protective tube away from the wire is to grasp and lift the end. However, in the procedure as shown in FIG. 9 described above, in order to smoothly shift to the procedure of pressing the electric wire 100 in the subsequent step (the step of FIG. 9D), one jaw 103a of the yatco 103 is protected by the protective tube 101. It is necessary to hold the position of the hook 104 near the end of the protective tube 101 when inserting it into the opening/closing part 101a. Therefore, the Yatco 103 has no choice but to grip the position away from the end of the protective tube 101. Therefore, after the hook 104 is slid to the electric wire 100 side, a considerable amount of force is required to operate the yatco 103 gripping the position away from the end to lift the protection tube 101.

Further, since only one of the opening/closing portions 101a of the protective tube 101 is gripped by the yatco 103, the other side of the opening/closing portion 101a easily follows when one side is lifted. That is, if only one side of the opening/closing part 101a is lifted, a force that rotates the protective tube 101 around the electric wire 100 is generated, so that the opening/closing part 101a exposing the electric wire 100 turns sideways. This makes it difficult to disconnect the electric wire 100. If the protective tube 101 is forcibly peeled off by the YATCO 103 in such a state that the electric wire 100 is difficult to be detached, the protective tube 101 is likely to be damaged, and it becomes difficult to repeatedly use the protective tube 101.

In the above procedure of FIG. 9, the protective tube 101 can be removed from the electric wire 100, but it is not suitable for disconnecting and disconnecting the connected protective tubes 101.

As described above, when a large force is required to separate the protective tube from the electric wire, it is necessary to select a member having a large diameter so as to withstand the large force. Also on the supporting side, it is necessary to select a stable member having a large diameter or to provide a large number of supporting tools in order to stabilize the member.

However, if a member having a large diameter is adopted, the weight increases correspondingly, which is disadvantageous for remote operation. Further, it is necessary to increase the number of workers in order to provide many lightweight tools, which leads to a reduction in work efficiency.

Further, if it is attempted to cope with the work of separating the protective tube from the electric wire in addition to the separation of the connection between the protective tubes, the work becomes complicated because it is necessary to prepare a tool suitable for each.

Therefore, the present invention provides a protective tube removing tool that minimizes damage to the protective tube and can easily separate the protective tubes from each other with a single tool and remove the separated protective tube from the electric wire. The purpose is to

In order to achieve the above object, the protective tube removing tool of the present invention is a protective tube removing tool that is detachably installed on the tip of an operating rod and is used to remove the protective tube from an electric wire by remote control. a connecting linkage unit operation rod, one end to the outer side in the radial direction around the direction of extension of said operating rod linked is provided integrally with the connecting portion so as to extend the protection tube between An insertion rod having a tip portion that can be inserted into a gap at a connection point and an extension side of the operation rod connected at the base side of the insertion rod are provided so as to face, and a part of a side surface of the protection tube is provided. A fitting groove is provided, and a protective tube contact portion is formed in a direction in which the insertion rod extends.

Further, in addition to the above configuration, the protective tube removing tool of the present invention has, in the extending direction of the insertion rod, the front end portion as the front side and the base portion as the rear side, among the end edges of the protective pipe contact portion. A notch is formed on the rear side and on the bottom side of the groove so as to widen toward the rear side.

Further, in addition to the above configuration, the protective tube removal tool of the present invention is a locking member that is provided so as to project in a direction orthogonal to the insertion rod and has a concave lower side so as to be locked to the upper surface of the electric wire. It is characterized by having a section.

As described above, according to the present invention, since the protective tube abutting portion is provided at the position facing the extension direction of the connected operation rod, when the operation rod is abutted from below the protective tube, the protective tube abuts. A part of the side surface of the protective tube fits into the concave groove formed in the contact portion and is stabilized. At this time, since the insertion rod integrally provided with the connecting portion is provided so as to extend in the same expanded diameter side as the direction in which the concave groove is formed, it is arranged along the lower side of the protective tube. It Accordingly, when the tip end is inserted into the gap between the protection pipes and the operation rod is rotated about the protection pipe contact portion as a fulcrum, the outer protection pipe can be removed in the radial direction.

Further, according to the present invention, in addition to the above effects, a notch is formed on the rear side of the edge of the protective tube abutting portion and on the bottom side of the groove so as to widen toward the rear side. Therefore, the larger the angle of tilting the operating rod to the rear side, the more the contact position with respect to the protective tube shifts to the wider position on the rear side of the notch. As a result, the more the operating rod is tilted to the rear side, the more it abuts on the side surface of the cylindrical protective tube at a high and wide position, which stabilizes.

Further, according to the present invention, in addition to the above effects, the lower side of the locking portion projecting in the direction intersecting with the insertion rod is formed in a concave shape so as to be locked to the upper surface of the electric wire. When the operation rod is rotated forward with the locking portion locked on the upper surface of the as a fulcrum, the tip end portion of the insertion rod is lifted. This makes it possible to easily remove the protective tube from the electric wire in the radial direction simply by arranging the distal end portion in a state in which the protective tube is inserted into the protective tube and rotating the operating rod forward.

1 is an overall perspective view of a protective tube removal tool according to an embodiment of the present invention. It is a front view of the protective tube removal tool of FIG. It is the side view seen from the front end side of the protective tube removal tool of FIG. It is a top view of the protective tube removal tool of FIG. It is a figure which shows the use condition at the time of separating the connection of a protection pipe. FIG. 5 is a partially enlarged view around the receiving plate of FIG. 4. It is a figure which shows the relationship of the contact position of a protective tube and a receiving plate. It is a figure which shows the use condition at the time of separating a protective tube from an electric wire. It is explanatory drawing of the conventional protection tube removal work.

Hereinafter, a protective tube removing tool according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an overall perspective view of a protective tube removal tool 1 according to this embodiment. The protective tube removing tool 1 is a tool used for separating two connected protective tubes and for removing the protective tube attached to the electric wire. The protective tube removing tool 1 has a connecting portion to which the tip of a common operating rod can be connected, and is used for remote operation. The configuration of each part of the protective tube removal tool 1 will be described with reference to FIG. 1 and a front view (FIG. 2 ), a side view (FIG. 3 ), and a plan view (FIG. 4) as appropriate.

First, referring to the overall perspective view of FIG. 1 and the front view of FIG. 2, an L-shaped insertion rod 4 is provided at the upper end of the connecting portion 2 of the protective tube removal tool 1. There is. The insertion rod 4 is a component to be inserted into a gap between the protection tubes in a connected state, which will be described later, or a tube opening of the protection tube. Two receiving plates 6 are provided in a wing-like arrangement on the upper end side (extension side of the operation rod to be connected) of the base portion 4b bent and formed in the L-shape of the insertion rod 4. The tip portion 4a of the insertion rod 4 is formed in a tapered shape in a front view like a flat-blade screwdriver.

Next, referring to the entire perspective view of FIG. 1 and the side view of the front end of FIG. 3, it can be seen that the two receiving plates 6 are arranged in a V-shaped cross section. In this way, the two receiving plates 6 form the groove (concave groove) 6a having a V-shaped cross section along the extending direction of the insertion rod 4 (the front-back direction shown in FIG. 1). When the rod 4 is brought into contact with the protective tube from below, a part of the cylindrical surface below the protective tube fits into the groove 6a and becomes stable.

Locking portions 8 are provided below the receiving plates 6. The locking portion 8 is arranged so as to extend in a direction orthogonal to the insertion rod 4. In the protective tube removal tool 1 according to the present embodiment, the locking portion 8 is formed in a substantially V shape in a side view, and is formed in an angle so that the tip is bent downward. (Bending angle θ). By this bent shape, the concave portion formed on the lower side can be hooked on the upper surface of the electric wire to stabilize the protective tube removal tool 1 as described later. Specifically, it is desirable that the bending angle θ be set so as to form an angle of at least 5 degrees downward from the horizontal position.

Subsequently, referring to the overall perspective view of FIG. 1 and the plan view of FIG. 4, the two receiving plates 6 include the above-mentioned V-shaped part among the end edges 6 b of the insertion rod 4 on the base 4 b side. A notch 6c is formed at a position near the bottom of the groove 6a. The notch 6c is formed so that a predetermined gap is provided between the two receiving plates 6, and each corner is rounded. As shown in FIG. 4, the notch 6c is formed at a position directly above the bending forming portion of the insertion rod 4.

Next, a method of using the protective tube removing tool 1 having the above configuration will be described. First, a usage state when the protection tubes are separated from each other will be described with reference to FIG.

FIG. 5 shows a usage state when the protection tubes are separated from each other, (a) shows a state where the protection tube removal tool 1 is set at a predetermined position, and (b) shows a state when the protection tubes are separated. ing.

As shown in FIG. 5A, the left protection tube 101 (female type) is connected so as to cover the right protection tube 101 (male type). For such a connection between the protection tubes 101, first, the protection tube removal tool 1 is arranged with the tip portion 4a inserted in the gap formed in the overlapping portion of the two protection tubes 101. In general, the female connection portion of the protective tube 101 is formed in a trumpet shape so that the tube mouth side slightly expands. On the other hand, the tip portion 4a of the insertion rod 4 of the protective tube removing tool 1 according to the present embodiment is formed in a tapered shape as described above. Therefore, even by remote control, the tip portion 4a of the insertion rod 4 can be easily inserted into the gap.

In this way, if the tip 4a of the insertion rod 4 can be hooked inside the tube opening of the protection tube 101 to be removed, then the receiving plate 6 is operated as a fulcrum, as shown in FIG. 5(b). By rotating the rod 102 rearward, the protective tube 101 is easily removed in the radial direction by the action of the lever. Since the protection tube 101 is formed of a flexible member, the fin-shaped opening/closing portion 101a opens when a radial force is applied.

By the way, the protective tube 101 is generally installed on the electric wire 100 with the fin-shaped opening/closing part 101a facing downward. Therefore, in order to perform the removal work in the above-described procedure, for example, it is necessary to rotate the opening/closing unit 101a in advance so as to face upward by using a remote operation cot.

Here, in the protective tube removal tool 1 according to the present embodiment, the rounded notch 6c is formed on the rear edge 6b (see FIG. 4) of the receiving plate 6 as described above. There is. As a result, when the tip end 4a of the insertion rod 4 is rotated downward by tilting the operating rod 102 backward, the rear end edge 6b of the receiving plate 6 mainly serves as a fulcrum, and this fulcrum is the fulcrum. With the rearward rotation of the, the sheet moves to the rear end side along the rounded notch 6c.

The movement of the fulcrum will be described with reference to FIGS. FIG. 6 is a partially enlarged view around the receiving plate 6 in the plan view shown in FIG. Further, FIG. 7 is a side view showing a relationship between contact positions of the protective tube 101 and the receiving plate 6. Note that, in FIG. 7, for convenience of description, components other than the protective tube 101, (the base portion 4b of) the insertion rod 4 and the receiving plate 6 are not shown. Further, the surface of the notch 6c on which the rounding has been performed is shown by hatching for easy visual recognition.

In the protective tube removing tool 1 according to the present embodiment, when the protective tube removing tool 1 is arranged in the state of FIG. 5A, the side surface of the protective tube 101 is near the bottom of the V-shaped groove (concave groove) 6 a of the receiving plate 6. It is configured to touch. Regarding this contact state, referring to FIG. 7, the contact points A and B between the protective tube 101 and the receiving plate 6 are located near the center of the region where the notch 6c is formed by hatching. I see.

On the other hand, referring to FIG. 6, the notch 6c of the receiving plate 6 is rounded so that the distance becomes wider toward the rear end side.

As a result, when the protective tube removal tool 1 is tilted, the two contact points A and B between the protective tube 101 and the receiving plate 6 are spaced apart as the inclination is larger. With reference to the protective pipe 101, the larger the inclination of the protective pipe removing tool 1 is, the larger the moving range of the contact points A and B from below to above is.

In order to compare the change in the force applied to the protection tube 101 from the receiving plate 6, for convenience, the pressure applied to the protection tube 101 from the protection tube removal tool 1 in two different inclined states is shown in FIG. 7 at the same time. (Here, these pressures are irrelevant to the contact points A and B described above.). The forces applied to the protective tube 101 when the inclination angle is small are represented by pressures P1 and P2, and when the inclination angle is larger than this, they are represented as pressures P11 and P12. Further, the horizontal components of the respective pressures P1, P2, P11, P12 are represented as pressures P1x, P2x, P11x, P12x, and the vertical components thereof are represented as pressures P1y, P2y, P11y, P12y.

As can be seen from FIG. 7, if the inclination angle of the protective tube removing tool 1 is increased, the protective tube 101 can be supported by the receiving plate 6 at a position closer to the center in the height direction.

In addition to this, in the pressures P1, P2, P11, and P12 generated by the vertical reaction force from the receiving plate 6, the proportion of the horizontal component increases as the center of the protective tube 101 in the height direction increases (pressure P1x<pressure P11x, pressure P2x<pressure P12x).

That is, the larger the angle of the protective tube removal tool 1, the deeper the protective tube 101 can be gripped, and the greater the horizontal gripping force (pressures P1x, P2x, P11x, P12x), the protective tube 101 becomes. The fulcrum that abuts against is stable, and the side slip of the receiving plate 6 on the protective tube 101 can be prevented.

In general, since the protective tube is flexible and easily deformed, it is held by using a remote control yatco or the like during work, and it is difficult to apply a large force from one side. Therefore, when rotating the operating rod 102 for removal, the receiving plate 6 cannot be pressed against the protective tube 101 with a very large force, but according to the protective tube removing tool 1 of the present invention, In a state in which the stability is likely to be lost due to a large inclination, the action of increasing the stability occurs, so that it is not necessary to press the protection tube 101 with an unnecessarily strong force.

Further, since the protective tube 101 is repeatedly used, the durability may be deteriorated when scratches and the like generated during the removal work are accumulated, but since the removal can be performed with a minimum required force for each work, the damage occurs. It is possible to prevent the deterioration of durability by minimizing the above.

Next, a usage state when the protective tube is separated from the electric wire will be described with reference to FIG. FIG. 8 shows a use state when the protective tube 101 is separated from the electric wire 100, (a) shows a state in which the protective tube removal tool 1 is set at a predetermined position, and (b) shows a state where the protective tube 101 is separated. Shows the state of.

After disconnecting the protective tubes 101 from each other by the procedure shown in FIG. 5, the protective tube 101 is connected to the electric wire 100.
Need to be removed from. On the other hand, in the protective tube removal tool 1 according to the present embodiment, as shown in FIG. 8A, the tip 4a of the insertion rod 4 is inserted into the tube opening 101b of the protective tube 101, and The locking portion 8 is arranged so as to be placed on the electric wire 100. Then, when the operating rod 102 is tilted toward the front side (the tip 4a side of the insertion rod 4 contrary to the case of FIG. 5) with the locking portion 8 as a fulcrum, the operation rod 102 is inclined to the opposite side to the case of FIG. 5 described above. The tip 4a of the insert bar 4 is rotated so as to be lifted. As a result, the protective tube 101 receives an upward force from the inner surface and is lifted.

In general, since the fin-like opening/closing part 101a of the protective tube 101 is installed downward, it is not necessary to twist the protective tube 101 by using a remote-controlling jack, and the protective tube removing tool 1 is simply tilted. Only then, the electric wire 100 is relatively exposed to the outside from between the opening/closing portions 101a.

Once a part of the electric wire 100 is exposed from between the opening/closing parts 101a, the protective tube 101 can be separated from the electric wire 100 with a small force. Therefore, the protective tube can be removed with the insertion rod 4 hooked on the inner surface of the protective tube 101. When the entire outer tool 1 is lifted, it can be easily removed with less work procedure.

It should be noted that the configurations shown in the above embodiments exemplify one embodiment of the present invention, and include the following modified examples.

In the above-described embodiment, the configuration including both the receiving plate 6 and the locking portion 8 is shown as an example. However, if at least the receiving plate 6 is provided, the protection tubes 101 can be separated from each other. Further, if only the locking portion 8 is provided, the protection tube 101 can be separated from the electric wire 100.

Further, in the above-described embodiment, an example in which the insertion rod 4 is made of an L-shaped bent metal member is shown. However, the gap between the protection pipes 101 connected to each other and the pipe port 101b. The material may be made of a material other than metal as long as it can be inserted into the tip portion 4a and can transmit the force for separating the protection tube 101.

The configuration is not limited to the L-shape, and may be formed so as to project directly from the connecting portion 2 in the direction orthogonal to the remote control rod. In this case, if the receiving plate 6 is provided on the upper end of the connecting portion 2, the work is stabilized.

Further, in the above-described embodiment, the receiving plate 6 is illustrated as an example in which two flat receiving plates 6 are arranged in a V shape, but a part of the cylindrical side surface of the protective tube 101 is fitted. Any groove that can be formed may have a curved surface other than the V-shaped cross section. Further, it may be formed of one bending member. Further, it may be integrally molded with the insertion rod 4. The locking portion 8 may be formed in a curved shape so that the lower concave shape becomes a straight bending shape.

According to the protective tube removing tool of the present invention, the protective tubes can be separated from each other and the protective tube can be detached from the electric wire only by being supported by the remote control cot. Therefore, it is useful for work in an environment where many tools cannot be introduced due to congestion, and work for a small number of people.

1 Protective Tube Removal Tool 2 Connecting Section 4 Inserting Rod 4a Tip Section 4b Base Section 6 Support Plate (Protective Tube Abutting Section)
6a groove (concave groove)
6b End edge 6c Notch 8 Locking part 100 Electric wire 101 Protective tube 101a Opening/closing part 101b Tube mouth 102 (insulating) operating rod 103 Yatco 103a, 103b Jaw part 104 Hook P1, P2, P11, P12 Pressure P1x, P2x, P11x , P12x pressure (horizontal component)
P1y, P2y, P11y, P12y Pressure (vertical component)
A, B Contact point θ Bending angle

Claims (3)

A protective tube removal tool that is detachably installed on the tip of the operating rod and that removes the protective tube from the electric wire by remote control.
A connecting portion capable of connecting the operating rod,
One end to the outer side in the radial direction around the direction extending linked with the operation rod is provided integrally with the connecting portion so as to extend, it can be inserted into the gap of the connection points between the protective tube tip An insertion rod having
A recessed groove is provided facing the extension side of the operation rod connected at the base side of the insertion rod, and a part of the side surface of the protection tube can be fitted in the groove extending in the extension direction of the insertion rod. A protective tube removing tool, comprising: In the extending direction of the insertion rod, the front end is the front side and the base is the rear side, which is the rear side of the end edges of the protection tube abutting portion and the bottom side of the recessed groove toward the rear side. The protective tube removing tool according to claim 1, wherein the notch is formed so as to widen. 3. The protection according to claim 1 or 2, further comprising: a locking portion which is provided so as to project in a direction orthogonal to the insertion rod and whose lower side is concave so that the upper surface of the electric wire can be locked. Pipe removal tool.