JP2020137268A - Cable clamp temporarily depositing tool and cable connection method for construction - Google Patents

Abstract

To provide a cable clamp temporarily depositing tool capable of improving workability while reducing a lateral weighted load of a distribution line when a cable for construction is attached to the distribution line.SOLUTION: A span cleat 1 comprises: a distribution line holding part 4; a coupling member 5; a cable clamp holding part 6; and a rope 8. The distribution line holding part 4 can be detached from and attached to a distribution line 90 between electric poles. The coupling member 5 has an electric insulation property, and is formed in an elongated shape. The cable clamp holding part 6 can touch and remove a cable clamp. The rope 8 can be deformed, and is formed in the elongated shape. By rotatably attaching one end part of the coupling member 5 to the distribution line holding part 4, a posture of the coupling member 5 to the distribution line holding part 4 can be changed. A position of the cable clamp holding part 6 is moved with the change of the posture of the coupling member 5. The position of an end part of the rope 8 is moved with the change of the posture of the coupling member 5.SELECTED DRAWING: Figure 1

Description

The present invention mainly relates to a temporary deposit tool for temporarily depositing a cable clamp on an electric wire.

In recent years, when performing construction on a distribution line erected between utility poles, a construction method that combines a live-line cutting method and an uninterruptible bypass method as shown in Patent Document 1 has become widespread. ..

To explain this construction method, first, in a state where the distribution line is energized (live line state), the distribution lines are electrically connected between the outer parts of the construction section by a bypass electric line. After that, the distribution lines are cut at both ends of the construction section. This cutting is performed so that the tension of the distribution line can be maintained between the utility poles even after the cutting in the live wire state. Patent Document 1 discloses a tool capable of cutting a distribution line while tension is applied to the distribution line.

Next, the grounding short-circuit device is electrically connected to the distribution line that has a power failure between the two disconnected points. The grounding short-circuit device is disclosed in Patent Document 2, for example. In this state, work is performed on the distribution line in the construction section.

Bypass cables as construction cables are arranged at both ends of the bypass electric circuit. A cable clamp for connecting to the distribution line between utility poles is attached to one end of the bypass cable. For example, Patent Document 3 discloses a cable clamp that does not require stripping of the insulating coating of a distribution line. This cable clamp has a configuration in which a movable body having a contact blade is pressed against the distribution line side to sandwich the distribution line. As a result, the contact blade penetrates the insulating coating, so that the bypass cable is electrically connected to the distribution line.

The end of the bypass cable opposite the cable clamp is connected to a construction switch attached to a utility pole. The construction switch is disclosed in Patent Document 4, for example. As a result, the bypass electric circuit can be electrically opened and closed.

Conventionally, the cable clamp before being connected to the distribution line was temporarily supported by a utility pole to which a construction switch was attached (temporary deposit). Specifically, for example, a temporary support cleat as shown in Patent Document 5 is attached in advance to an appropriate place on a utility pole, and a cable clamp is temporarily deposited in the temporary support cleat. After that, the temporarily deposited cable clamp is connected to the distribution line between the utility poles.

Japanese Unexamined Patent Publication No. 62-31312 Japanese Unexamined Patent Publication No. 2009-177898 Japanese Patent No. 5917661 JP-A-2017-130295 Japanese Unexamined Patent Publication No. 2006-318720

In the conventional construction method, the operator needs to carry the cable clamp from the utility pole where the cable clamp is temporarily deposited to the connection target location of the distribution line (the part between the utility pole and the utility pole) by the bucket of the aerial work platform. Normally, since the distribution line is a three-phase three-wire system, the operator needs to make three round trips with a bucket from the utility pole to the middle part of the distribution line. After connecting the cable clamp to the distribution line, the operator must always be sufficiently far away from the bypass cable, which curves downwardly. For this reason, it was necessary to move the bucket while making a large detour, which took more time.

Also, if you connect the construction switch and the connection point to the distribution line away from it with a bypass cable, the bypass cable will be connected to the distribution line so that it hangs diagonally downward instead of vertically. It becomes a shape. Therefore, a significant portion of the weight of the bypass cable is added to the distribution line via the cable clamp. Therefore, since the distribution line is strongly pulled diagonally downward by the cable clamp, the lateral load load on the distribution line increases, which causes damage to the distribution line. In addition, an oblique force is applied to the connection portion between the distribution line and the bypass cable, which causes a decrease in the reliability of the electrical connection.

The present invention has been made in view of the above circumstances, and an object of the present invention is to temporarily deposit a cable clamp that reduces the lateral load load on the distribution line when the construction cable is attached to the distribution line and improves workability. To provide tools.

Means and effects to solve problems

The problem to be solved by the present invention is as described above, and next, the means for solving this problem and its effect will be described.

According to the first aspect of the present invention, a cable clamp temporary deposit tool having the following configuration is provided. That is, this cable clamp temporary deposit tool includes a distribution line holding portion, a connecting member, a cable clamp holding portion, and a hanging member. The distribution line holding portion is removable with respect to the distribution line between the utility poles. The connecting member has electrical insulation and is formed in an elongated shape. The cable clamp can be attached to and detached from the cable clamp holding portion. The hanging member is deformable and is elongated. By rotatably attaching one end of the connecting member to the distribution line holding portion, the posture of the connecting member with respect to the distribution line holding portion can be changed. The position of the cable clamp holding portion moves as the posture of the connecting member changes. The position of the end portion of the hanging member moves as the posture of the connecting member changes.

As a result, the cable clamp can be temporarily deposited in the cable clamp temporary deposit tool fixed to the distribution line between the utility poles. Therefore, as compared with the case of temporarily depositing on a utility pole, the distance required to move the temporarily deposited cable clamp before connecting to the distribution line can be shortened. Further, the posture of the connecting member can be changed with respect to the distribution line holding portion in a state where the cable clamp is temporarily deposited in the cable clamp holding portion or in a state where the rope is fixed in the middle portion of the construction cable. Therefore, the construction cable can be supported without being forcibly bent. Further, by fixing the rope in the middle of the construction cable, a considerable part of the weight of the construction cable can be supported by the cable clamp temporary deposit tool. Therefore, the lateral load load on the distribution line can be reduced. In other words, it is possible to prevent damage to the distribution line due to the cable clamp being strongly pulled diagonally downward by the construction cable while the cable clamp is connected to the distribution line.

The cable clamp temporary deposit tool preferably includes a short-circuit grounding clamp holding portion to which the short-circuit grounding clamp can be attached and detached.

As a result, in addition to the cable clamp, the short-circuit grounding clamp can be temporarily deposited in the cable clamp temporary deposit tool. Therefore, workability is further improved.

In the cable clamp temporary deposit tool, it is preferable that the cable clamp holding portion and the short-circuit grounding clamp holding portion are electrically conductive.

As a result, by attaching the cable clamp to the cable clamp holding portion and attaching the short-circuit grounding clamp to the short-circuit grounding clamp holding portion, it is possible to easily discharge the construction cable.

In the cable clamp temporary deposit tool, it is preferable that the cable clamp holding portion and the short-circuit grounding clamp holding portion are arranged on opposite sides of the connecting member.

As a result, the size of the cable clamp temporary deposit tool can be reduced. In addition, the cable clamp and short-circuit grounding clamp can be temporarily stored in a compact space.

In the cable clamp temporary deposit tool, the rotating shaft on which the connecting member rotates with respect to the distribution line holding portion is arranged at a position different from the place where the distribution line holding portion holds the distribution line in a plan view. It is preferable that it is.

As a result, an appropriate gap can be formed between the connecting member and the distribution line holding portion. Therefore, it is possible to realize a configuration in which the distribution line holding portion does not easily get in the way when the connecting member changes its posture.

According to the second aspect of the present invention, the following construction cable connecting method is provided. That is, in this construction cable connecting method, a cable clamp temporary deposit tool including a distribution line holding portion, a connecting member, a cable clamp holding portion, and a hanging member is used. The distribution line holding portion is removable with respect to the distribution line between the utility poles. The connecting member has electrical insulation and is formed in an elongated shape. The cable clamp can be attached to and detached from the cable clamp holding portion. The hanging member is deformable and is elongated. By rotatably attaching one end of the connecting member to the distribution line holding portion, the posture of the connecting member with respect to the distribution line holding portion can be changed. The position of the cable clamp holding portion moves as the posture of the connecting member changes. The position of the end portion of the hanging member moves as the posture of the connecting member changes. The construction cable connecting method includes a cable clamp connecting step. In this cable clamp connecting step, the cable clamp attached to the cable clamp holding portion is attached to the distribution line between the utility poles in a state where the distribution line holding portion of the cable clamp temporary deposit tool is attached. It is removed from the cable clamp holding portion and connected to the distribution line. In the cable clamp connecting step, the middle part of the construction cable connected to the cable clamp is supported by the hanging member.

As a result, the cable clamp can be temporarily deposited in the cable clamp temporary deposit tool fixed to the distribution line between the utility poles. Therefore, as compared with the case of temporarily depositing on a utility pole, the distance required to move the temporarily deposited cable clamp before connecting to the distribution line can be shortened. Further, the posture of the connecting member can be changed with respect to the distribution line holding portion in a state where the cable clamp is temporarily deposited in the cable clamp holding portion or in a state where the rope is fixed in the middle portion of the construction cable. Therefore, the construction cable can be supported without being forcibly bent. Further, by fixing the rope in the middle of the construction cable, a considerable part of the weight of the construction cable can be supported by the cable clamp temporary deposit tool. Therefore, the lateral load load on the distribution line can be reduced. In other words, it is possible to prevent damage to the distribution line due to the cable clamp being strongly pulled diagonally downward by the construction cable while the cable clamp is connected to the distribution line.

The perspective view which shows the overall structure of the span cleat which concerns on one Embodiment of this invention. The perspective view which shows the cable clamp. The perspective view which shows the short-circuit grounding clamp. The schematic diagram which shows the construction section set in the distribution line. The schematic diagram which shows the state which attached the span cleat to the distribution line. The schematic diagram which shows the state which the cable clamp was temporarily deposited in the span cleat. The schematic diagram which shows the state which the short-circuit grounding clamp was temporarily deposited in the span cleat. The schematic diagram which shows the state which hung the middle part of a bypass cable with a rope. The schematic diagram which shows the state which connected the cable clamp to a distribution line. The perspective view which shows the state corresponding to FIG. The schematic diagram which shows the state which connected the short-circuit grounding clamp to the cut distribution line. The perspective view which shows the state which the short-circuit grounding clamp was temporarily deposited in each of three span cleats before removing a cable clamp from a distribution line and temporarily depositing it in a span cleat.

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the overall configuration of the span cleat 1 according to the embodiment of the present invention. FIG. 2 is a perspective view showing the cable clamp 60. FIG. 3 is a perspective view showing the short-circuit grounding clamp 70.

The span cleat (cable clamp temporary deposit tool) 1 shown in FIG. 1 is a tool that is detachably attached to a portion of the distribution line 90 between the utility poles. The span cleat 1 can temporarily support the cable clamp 60 shown in FIG. 2 and the short-circuit grounding clamp 70 shown in FIG. 3 while being attached to the distribution line 90 (temporary deposit).

As shown in FIG. 1, the span cleat 1 includes a distribution line holding portion 4, a connecting member 5, a cable clamp holding portion 6, a short-circuit grounding clamp holding portion 7, and a rope (hanging member) 8. ..

The distribution line holding unit 4 sandwiches and holds the distribution line 90 from above and below. As a result, the span cleat 1 can be fixed to the distribution line 90.

The distribution line holding portion 4 includes a clamp main body 10, a screw boss 13, a screw shaft 11, a movable member 12, an operation joint 16, and an offset arm 17.

The clamp body 10 is formed in a substantially C shape, and the distribution line 90 can be inserted therein. Since the upper portion of the clamp body 10 is formed in a hook shape, the clamp body 10 can be hooked on the distribution line 90.

The screw boss 13 is fixed to the lower part of the clamp body 10. A through-shaped screw hole is formed in the screw boss 13. The screw holes are arranged so as to face in the vertical direction with the clamp main body 10 hooked on the distribution line 90.

The screw shaft 11 is screwed into the screw hole of the screw boss 13. One end (upper end) of the screw shaft 11 projects inside the clamp body 10. An operation joint 16 is formed at the other end (lower end) of the screw shaft 11.

The movable member 12 is arranged inside the clamp body 10. The movable member 12 is rotatably attached to the end of the screw shaft 11. The movable member 12 is located below the distribution line 90 with the clamp body 10 hooked on the distribution line 90.

The movable member 12 is guided so as to be movable with respect to the clamp main body 10 in a direction parallel to the screw shaft 11. Further, the movable member 12 is prevented from rotating with respect to the clamp main body 10.

The operation joint 16 is formed in a boss shape at the lower end of the screw shaft 11. The hot stick 50 can be detachably connected to the operation joint 16. The hot stick 50 is a known insulating rod used for remote control in the indirect live-line method. The screw shaft 11 can be rotated by rotating the hot stick 50 with the hot stick 50 connected to the operation joint 16.

The offset arm 17 is fixed to the clamp body 10. The offset arm 17 is elongated in parallel with the longitudinal direction of the distribution line 90 in a state where the distribution line holding portion 4 is attached to the distribution line 90. Although the details will be described later, the connecting member 5 is attached to the offset arm 17.

With the above configuration, when the hot stick 50 is rotated while being connected to the operation joint 16, the screw shaft 11 is rotated and the movable member 12 is screwed. As a result, the movable member 12 advances / retracts into the internal space of the clamp body 10. As a result, the distribution line 90 can be clamped / unclamped.

The connecting member 5 is formed in the shape of an elongated round bar by a member having electrical insulation.

One end of the connecting member 5 in the longitudinal direction is rotatably connected to the offset arm 17 included in the distribution line holding portion 4 by a pin 23. With the distribution line holding portion 4 attached to the distribution line 90, the axis of the pin 23 (in other words, the rotation axis of the connecting member 5) is horizontal and oriented orthogonal to the distribution line 90 in a plan view. It has become.

In the connecting member 5, the connecting member 19 is fixed to the end on the side opposite to the side connected to the distribution line holding portion 4 (the end on the side far from the distribution line holding portion 4). A cable clamp holding portion 6 and a short-circuit grounding clamp holding portion 7 are attached to the connecting member 19.

The cable clamp holding portion 6 is formed in a linearly elongated round bar shape. One end of the cable clamp holding portion 6 in the longitudinal direction is attached to the connecting member 5 via the connecting member 19. The cable clamp 60 can be detachably fixed to the cable clamp holding portion 6.

In the present embodiment, the cable clamp 60 has a contact blade 62 as shown in FIG. Details of the cable clamp 60 will be described later. As shown in FIG. 1, the cable clamp holding portion 6 is formed with a ring-shaped groove 29 so that the contact blade 62 is not deformed when clamped by the cable clamp 60.

The short-circuit grounding clamp holding portion 7 is formed in a linearly elongated round bar shape. One end of the short-circuit grounding clamp holding portion 7 in the longitudinal direction is attached to the connecting member 5 via the connecting member 19. The short-circuit grounding clamp 70 can be detachably fixed to the short-circuit grounding clamp holding portion 7. Details of the short-circuit grounding clamp 70 will be described later.

The cable clamp holding portion 6 and the short-circuit grounding clamp holding portion 7 are arranged on opposite sides of each other with the connecting member 19 (the end portion of the connecting member 5) interposed therebetween. Further, the cable clamp holding portion 6 and the short-circuit grounding clamp holding portion 7 are arranged side by side so as to form a straight line as a whole. The longitudinal direction of the cable clamp holding portion 6 and the short-circuit grounding clamp holding portion 7 is arranged parallel to the axis of the pin 23 described above.

The cable clamp holding portion 6 and the short-circuit grounding clamp holding portion 7 are formed of a good electric conductor (for example, metal). The cable clamp holding portion 6 and the short-circuit grounding clamp holding portion 7 are electrically conductive via a connecting member 19 similarly formed of a good electric conductor.

The connecting member 19 is formed in a U shape. The cable clamp holding portion 6 is attached to one side surface of the connecting member 19, and the short-circuit grounding clamp holding portion 7 is attached to the other side surface.

A pulley 31 is rotatably supported inside the U-shaped connecting member 19. A loop portion formed on one end side of the rope 8 is wound around the pulley 31. As a result, the rope 8 is rotatably attached to the end of the connecting member 5.

The rope 8 is formed in an elongated shape by a material having electrical insulation. The rope 8 has flexibility and can be appropriately deformed. Although the details will be described later, a part of the weight of the bypass cable 65 can be supported by connecting the tip of the rope 8 to the middle part of the bypass cable (construction cable) 65 shown in FIG.

In the present embodiment, as shown in FIG. 1, the cable clamp holding portion 6 and the short-circuit grounding clamp holding portion 7 are attached to the end portion of the connecting member 5 on the side far from the distribution line holding portion 4. Similarly, the end portion of the rope 8 is also attached to the end portion of the connecting member 5 on the side far from the distribution line holding portion 4. Therefore, as shown by the arrow in FIG. 1, as the connecting member 5 changes its posture, the position of the cable clamp holding portion 6, the position of the short-circuit grounding clamp holding portion 7, and the position of the end portion of the rope 8 are changed. It moves by drawing an arc-shaped trajectory. As a result, the posture of the connecting member 5 can be flexibly changed according to the force applied to the temporarily deposited cable clamp 60 and the short-circuit grounding clamp 70, or the force applied to the rope 8. As a result, the weights of the cable clamp 60, the bypass cable 65, and the like can be supported without difficulty.

Further, in the present embodiment, since the pin 23 is arranged at the tip of the offset arm 17, the rotation axis of the connecting member 5 is slightly separated from the place where the distribution line holding portion 4 holds the distribution line 90. As a result, an appropriate gap can be formed between the connecting member 5 and the distribution line holding portion 4, so that when the connecting member 5 changes its posture, it is less likely to interfere with the distribution line holding portion 4. ing. Further, when the clamp / clamp release operation of the distribution line holding portion 4 is performed, the connecting member 5 does not easily interfere with the hot stick 50, so that the workability is good.

Next, the cable clamp 60 will be described.

As shown in FIG. 2, a cable clamp 60 is fixed to the tip of the bypass cable 65. The cable clamp 60 includes a clamp portion 61. The clamp portion 61 can clamp the distribution line 90 in the vertical direction in the same manner as the distribution line holding portion 4 in the span cleat 1. Since the configuration of the clamp portion 61 is the same as that of the distribution line holding portion 4 of the span cleat 1, the description thereof will be omitted. However, the clamp portion 61 is provided with a contact blade 62 for cutting the insulating film and contacting the core wire when the distribution line 90 is clamped. As a result, the clamp portion 61 and the core wire of the distribution line 90 are electrically conductive. The clamp portion 61 is composed of a good electric conductor and is electrically connected to the core wire of the bypass cable 65.

A joint member 63 is provided at the lower end of the clamp portion 61. By connecting the hot stick 50 to the joint member 63 and rotating the screw shaft, the cable clamp 60 can be clamped / released. The periphery of the clamp portion 61 is covered with an insulating cover 64.

Next, the short-circuit grounding clamp 70 will be described.

As shown in FIG. 3, the short-circuit grounding device 78 includes a short-circuit grounding cable 75 and a short-circuit grounding clamp 70. One end of the short-circuit ground cable 75 is electrically connected to a ground terminal (not shown) embedded in the ground. The short-circuit grounding clamp 70 is fixed to the end of the short-circuit grounding cable 75 opposite to the grounding terminal.

The short-circuit grounding clamp 70 includes a clamp portion 71. The clamp portion 71 can clamp the distribution line 90 in the vertical direction in the same manner as the distribution line holding portion 4 in the span cleat 1. Since the configuration of the clamp portion 71 is the same as that of the distribution line holding portion 4 of the span cleat 1, the description thereof will be omitted. In the distribution line 90, the insulating coating at the portion to be clamped by the clamp portion 71 is stripped in advance to expose the core wire. Therefore, by clamping the distribution line 90 with the clamp portion 71, the clamp portion 71 and the core wire of the distribution line 90 are electrically conductive. The clamp portion 71 is composed of a good electric conductor, and is electrically connected to the core wire of the short-circuit grounding cable 75.

A joint member 73 is provided at the lower end of the short-circuit grounding clamp 70. By connecting the hot stick 50 to the joint member 73 and rotating the screw shaft, the short-circuit grounding clamp 70 can be clamped / released.

A clamp mounting rod 74 is provided below the short-circuit grounding clamp 70 of one of the three phases. As shown by the chain line in FIG. 3, another two-phase short-circuit grounding clamp 70 can be temporarily fixed to the clamp mounting rod 74. This makes it easy to handle the short-circuit grounding clamp 70 and the short-circuit grounding cable 75 for three phases and three lines together.

Next, the work of attaching the bypass cable 65 to the distribution line 90 using the span cleat 1 will be described in detail with reference to FIGS. 4 to 11.

FIG. 4 schematically shows one end of the construction section 90a set for the distribution line 90. When attaching the bypass cable 65 to the distribution line 90 outside the construction section 90a, one end of each of the three bypass cables 65 in the longitudinal direction is connected to the construction switch 42 attached to the utility pole 41 in advance. deep. However, in FIGS. 4 to 9 and 11, only one distribution wire 90, bypass cable 65, span cleat 1, and the like are shown. The construction switch 42 is turned off in advance.

Next, as shown in FIG. 5, the operator clamps the distribution line 90 by the distribution line holding portion 4 of the span cleat 1. The direction in which the span cleat 1 is attached to the distribution line 90 is such that the connecting member 5 is closer to the construction section 90a than the distribution line holding portion 4 (the side closer to the construction switch 42). As a result, the span cleat 1 is fixed to the distribution line 90, and the connecting member 5 is in a state of facing substantially downward.

The operation of attaching the span cleat 1 can be performed by attaching the hot stick 50 to the operation joint 16 of the span cleat 1 and rotating the hot stick 50. The operator performs various operations while riding on a bucket of an aerial work platform (not shown).

The work of attaching the span cleat 1 is performed for each of the three-phase, three-wire distribution lines 90. Therefore, three span cleats 1 are required.

Subsequently, as shown in FIG. 6, the operator attaches the cable clamp 60 to the cable clamp holding portion 6 for each of the three span cleats 1. Specifically, the cable clamp holding portion 6 is clamped by the clamp portion 61 of the cable clamp 60. This operation is performed with the hot stick 50 connected to the cable clamp 60. As a result, the cable clamp 60 is temporarily deposited in the span cleat 1.

Between the cable clamp 60 fixed to the span cleat 1 and the construction switch 42, the bypass cable 65 is in a state of hanging while bending downward. Since the cable clamp holding portion 6 is arranged at the lower end portion of the connecting member 5 whose posture can be changed with respect to the distribution line holding portion 4, the cable clamp 60 can be moved as shown by the chain line in FIG. 6, for example. is there. As a result, the bypass cable 65 can be naturally bent between the cable clamp 60 and the construction switch 42. Therefore, damage due to excessive bending of the bypass cable 65 can be prevented.

Next, as shown in FIG. 7, the operator attaches the short-circuit grounding device 78 in which the three-phase three-line segment is grouped to the short-circuit grounding clamp holding portion 7 in the span cleat 1 of one of the three. Specifically, the short-circuit ground clamp holding portion 7 is clamped by the clamp portion 71 of the short-circuit ground clamp 70. This operation is performed with the hot stick 50 connected to the short-circuit grounding clamp 70. However, in FIGS. 7 and 7 onward, the hot stick 50 connected to the short-circuit grounding clamp 70 is not drawn in order to avoid complicating the figure. As a result, the short-circuit grounding clamp 70 is temporarily deposited in the span cleat 1.

After that, the operator pulls the midway portion of the bypass cable 65 closer to the span cleat 1 side to some extent, and loosens the bypass cable 65 by an appropriate amount between the midway portion and the cable clamp 60. In this state, as shown in FIG. 8, the middle part of the bypass cable 65 is tied to the rope 8 of the span cleat 1. This work is performed on each of the three bypass cables 65 (interval cleats 1).

As shown in FIG. 1, in the span cleat 1, the place where the end portion of the rope 8 is attached to the connecting member 5 is closer to the cable clamp holding portion 6 than to the short-circuit grounding clamp holding portion 7. Therefore, when the rope 8 is fixed to the bypass cable 65, the rope 8 can be prevented from being caught by the short-circuit grounding clamp 70 or the like temporarily stored in the short-circuit grounding clamp holding portion 7. As a result, the work can be performed smoothly.

Next, the operator operates the hot stick 50 to remove the cable clamp 60 from the cable clamp holding portion 6 of the span cleat 1. After that, as shown in FIG. 9, the cable clamp 60 is attached to the distribution line 90. Specifically, the distribution line 90 is clamped by the clamp portion 61 of the cable clamp 60. As a result, the distribution line 90 and the bypass cable 65 are electrically conductive. The attachment point of the distribution line 90 to the cable clamp 60 is on the side farther from the construction section 90a than the attachment point of the span cleat 1 to the distribution line 90.

This work is done for each of the three cable clamps 60. FIG. 10 shows a state in which three cable clamps 60 are connected to the distribution line 90.

In the state of FIG. 9, a considerable portion of the weight of the bypass cable 65 between the cable clamp 60 and the construction switch 42 is supported by the span cleat 1 via the rope 8 and the connecting member 5. Therefore, the cable clamp 60 connected to the distribution line 90 is not strongly pulled diagonally downward due to the weight of the bypass cable 65. Therefore, it is possible to prevent the distribution line 90 from breaking at the connection point of the cable clamp 60. Further, since the lateral load load on the distribution line 90 can be reduced, damage to the distribution line 90 can be prevented. Further, it is possible to prevent distortion of the holes formed in the insulating coating of the distribution line 90 by the contact blade 62 of the cable clamp 60.

Further, since the weight of the bypass cable 65 is shared and supported by the span cleat 1 and the cable clamp 60, it is possible to prevent a large load from being locally applied to the distribution line 90.

The rope 8 is connected to the lower end portion of the connecting member 5 whose posture can be changed with respect to the distribution line holding portion 4. Therefore, the midway portion of the bypass cable 65 can be suspended and supported while flexibly changing the posture of the connecting member 5. As a result, it is possible to prevent the bypass cable 65 from being forcibly bent.

As described above, the work of connecting the cable clamp 60 to the distribution line 90 is performed for each of the three cable clamps 60. In this respect, in the present embodiment, the three cable clamps 60 are temporarily deposited in the span cleats 1 fixed at locations close to the connection points with the distribution line 90. Therefore, the distance for moving the cable clamp 60 from the span cleat 1 to the connection point with respect to the distribution line 90 can be shortened. Since the connection work of the cable clamp 60 is repeated three times, the effect of shortening the distance is particularly large.

After connecting the first cable clamp 60 to the distribution wire 90, the bypass cable 65 connected to the cable clamp 60 is in a charged state. However, since the middle part of the bypass cable 65 is suspended by the rope 8, the bypass cable 65 does not hang down significantly in the vicinity of the cable clamp 60. Therefore, when connecting the second and subsequent cable clamps 60 to the distribution line 90, it is not necessary to make a large detour and move. In this sense as well, the workability as a whole can be improved.

With the above, the connection work of the cable clamp 60 to the distribution line 90 is completed. It should be noted that substantially the same work as described above is performed on the opposite end of the construction section 90a. As a result, a bypass electric circuit that bypasses the construction section 90a is constructed. After that, the construction switch 42 is turned on.

Subsequently, the distribution line 90 is cut at the cut portion 49 shown in FIG. 11 using an appropriate cutting work tool. As the cutting work tool, for example, the tool shown in Patent Document 1 can be used. The distribution line 90 is similarly cut on the opposite side of the construction section 90a. As a result, the distribution line 90 in the construction section 90a is cut off.

After that, in the distribution line 90 of the construction section 90a, the insulating coating at the portion near the cut portion 49 is stripped off, and the short-circuit grounding clamp 70 fixed to the span cleat 1 of one of the three is attached. This work is performed on each of the three distribution lines 90. After that, work on the distribution line 90 in the construction section 90a is appropriately performed according to the purpose of the construction.

After the construction in the construction section 90a is completed, the bypass cable 65 and the span cleat 1 may be removed in the reverse procedure of the above. However, as shown in FIG. 12, the short-circuit grounding clamp 70 removed from each of the three distribution lines 90 is temporarily deposited in each of the three span cleats 1 instead of being combined into one. In this state, when the three cable clamps 60 are removed and temporarily deposited in the respective span cleats 1, the cable clamp holding portion 6 and the short-circuit grounding clamp holding portion 7 are electrically conductive, so that the three cable clamps 60 Each of the above can be discharged via the short-circuit grounding clamp 70. As described above, the span cleat 1 of the present embodiment can easily discharge the cable clamp 60.

As described above, the span cleat 1 of the present embodiment includes a distribution line holding portion 4, a connecting member 5, a cable clamp holding portion 6, and a rope 8. The distribution line holding portion 4 is removable from the distribution line 90 between the utility poles 41. The connecting member 5 has electrical insulation and is formed in an elongated shape. The cable clamp 60 can be attached to and detached from the cable clamp holding portion 6. The rope 8 is deformable and is elongated. By rotatably attaching one end of the connecting member 5 to the distribution line holding portion 4, the posture of the connecting member 5 with respect to the distribution line holding portion 4 can be changed. The position of the cable clamp holding portion 6 moves as the posture of the connecting member 5 changes. The end of the rope 8 moves as the posture of the connecting member 5 changes.

Further, in the present embodiment, the bypass cable 65 is connected to the distribution line 90 by the method shown below. That is, this bypass cable connecting method includes a cable clamp connecting step. In this cable clamp connecting step, the cable clamp 60 attached to the cable clamp holding portion 6 is cable-clamped in a state where the distribution line holding portion 4 of the span cleat 1 is attached to the distribution line 90 between the utility poles 41. It is removed from the holding portion 6 and connected to the distribution line 90. In the cable clamp connecting step, the middle part of the bypass cable 65 connected to the cable clamp 60 is supported by the rope 8.

As a result, the cable clamp 60 can be temporarily deposited in the span cleat 1 fixed to the distribution line 90 between the utility poles 41. Therefore, as compared with the case of temporarily depositing on the utility pole 41, the distance that the temporarily deposited cable clamp 60 must be moved before being connected to the distribution line 90 can be shortened. Further, the posture of the connecting member 5 is changed with respect to the distribution line holding portion 4 with the cable clamp 60 temporarily deposited in the cable clamp holding portion 6 or with the rope 8 fixed in the middle of the bypass cable 65. can do. Therefore, the bypass cable 65 can be supported without being forcibly bent. Further, by fixing the rope 8 in the middle of the bypass cable 65, a considerable part of the weight of the bypass cable 65 can be supported by the span cleat 1. Therefore, the lateral load load on the distribution line 90 can be reduced. In other words, it is possible to prevent damage to the distribution line 90 due to the cable clamp 60 being strongly pulled diagonally downward by the bypass cable 65 while the cable clamp 60 is connected to the distribution line 90.

Further, the span cleat 1 of the present embodiment includes a short-circuit grounding clamp holding portion 7 to which the short-circuit grounding clamp 70 can be attached and detached.

As a result, in addition to the cable clamp 60, the short-circuit grounding clamp 70 can be temporarily deposited in the span cleat 1. Therefore, workability is further improved.

Further, in the span cleat 1 of the present embodiment, the cable clamp holding portion 6 and the short-circuit grounding clamp holding portion 7 are electrically conductive.

As a result, the bypass cable 65 can be easily discharged by attaching the cable clamp 60 to the cable clamp holding portion 6 and attaching the short-circuit grounding clamp 70 to the short-circuit grounding clamp holding portion 7.

Further, in the span cleat 1 of the present embodiment, the cable clamp holding portion 6 and the short-circuit grounding clamp holding portion 7 are arranged on opposite sides of each other with the connecting member 5 interposed therebetween.

As a result, the span cleat 1 can be downsized. In addition, the cable clamp 60 and the short-circuit grounding clamp 70 can be temporarily stored in a compact space.

Further, in the span cleat 1 of the present embodiment, the rotating shaft on which the connecting member 5 rotates with respect to the distribution line holding portion 4 is located at a position different from the location where the distribution line holding portion 4 holds the distribution line 90 in a plan view. It is located in.

As a result, an appropriate gap can be formed between the connecting member 5 and the distribution line holding portion 4. Therefore, it is possible to realize a configuration in which the distribution line holding portion 4 is less likely to get in the way when the connecting member 5 changes its posture.

Although the preferred embodiment of the present invention has been described above, the above configuration can be changed as follows, for example.

The offset arm 17 can be omitted, and the connecting member 5 can be directly attached to the clamp body 10.

The shape of the cable clamp holding portion 6 can be appropriately changed as long as it can be clamped by the cable clamp 60. The same applies to the short-circuit grounding clamp holding portion 7.

The short-circuit grounding clamp holding portion 7 may be omitted.

The span cleat 1 may include a plurality of ropes 8. For example, a chain or the like may be used instead of the rope 8.

In the above-described embodiment, the tip of the rope 8 is connected to the bypass cable 65. However, a clamp or the like may be provided at the tip of the rope 8 to clamp the bypass cable 65 to fix the rope.

The cable clamp temporary deposit tool of the present invention can be widely used for construction other than the uninterruptible bypass construction method.

1 span cleat (cable clamp temporary deposit tool)
4 Distribution line holding part 5 Connecting member 6 Cable clamp holding part 7 Short-circuit grounding clamp holding part 8 Rope (hanging member)
41 Utility pole 60 Cable clamp 65 Bypass cable (construction cable)
70 Short-circuit grounding clamp 90 Distribution line

Claims (6)

A distribution line holder that can be attached to and detached from the distribution line between utility poles,
With electrically insulating and elongated connecting members,
Cable clamp holder for attaching and detaching the cable clamp,
Deformable elongated hanging member and
With
By rotatably attaching one end of the connecting member to the distribution line holding portion, the posture of the connecting member with respect to the distribution line holding portion can be changed.
The position of the cable clamp holding portion moves as the posture of the connecting member changes.
A cable clamp temporary deposit tool characterized in that the position of an end portion of the hanging member moves with a change in the posture of the connecting member. The cable clamp temporary deposit tool according to claim 1.
A cable clamp temporary deposit tool characterized by having a short-circuit grounding clamp holding portion to which a short-circuit grounding clamp can be attached and detached. The cable clamp temporary deposit tool according to claim 2.
A cable clamp temporary deposit tool characterized in that the cable clamp holding portion and the short-circuit grounding clamp holding portion are electrically conductive. The cable clamp temporary deposit tool according to claim 2 or 3.
A cable clamp temporary deposit tool characterized in that the cable clamp holding portion and the short-circuit grounding clamp holding portion are arranged on opposite sides of each other with the connecting member interposed therebetween. The cable clamp temporary deposit tool according to any one of claims 1 to 4.
The rotating shaft on which the connecting member rotates with respect to the distribution line holding portion is a cable clamp characterized in that the rotating shaft is arranged at a position different from the location where the distribution line holding portion holds the distribution line in a plan view. Temporary deposit tool. A distribution line holder that can be attached to and detached from the distribution line between utility poles,
With electrically insulating and elongated connecting members,
Cable clamp holder for attaching and detaching the cable clamp,
Deformable elongated hanging member and
With
By rotatably attaching one end of the connecting member to the distribution line holding portion, the posture of the connecting member with respect to the distribution line holding portion can be changed.
The position of the cable clamp holding portion moves as the posture of the connecting member changes.
This is a construction cable connection method using a cable clamp temporary deposit tool in which the position of the end portion of the suspension member moves as the posture of the connecting member changes.
With the distribution line holding portion of the cable clamp temporary deposit tool attached to the distribution line between the utility poles, the cable clamp attached to the cable clamp holding portion is removed from the cable clamp holding portion. Including a cable clamp connecting step of connecting to the distribution line
A construction cable connecting method, characterized in that, in the cable clamp connecting step, an intermediate portion of a construction cable connected to the cable clamp is supported by the suspension member.

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