JP2006246578A - Tool for untwining power cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an untwining tool for a power cable, which can easily untwining a unified power cable, even if it is a power cable being unified by intertwining a plurality of unit cables firmly, and can separate one faulty unit cable from other sound unit cables thereby enabling it to be repaired safely. <P>SOLUTION: This untwining tool for a power cable comprises an outer frame which holds the power cable and a plurality of pressers which are arranged via an adjusting mechanism inside the outer frame. Each presser includes an elastic body, which is modeled on the peripheral form of the power cable, on its front side. Moreover, the power cable is made by intertwining a plurality of power cables, and the elastic body of the presser abutting on these unit cables is modeled on the peripheral form of an adjacent unit cable. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a power cable twisting tool used when repairing a power cable in which a failure such as dielectric breakdown occurs.

  The power cable C is generally composed of three unit cables c1, c2, and c3 as shown in FIG. 14 in order to transmit three-phase power. The power cable C is twisted so that the outer peripheral surfaces of adjacent unit cables c1, c2, and c3 are in contact with each other, and the three unit cables c1, c2, and c3 are substantially unified.

  As described above, in the power cable C in which the three unit cables c1, c2, and c3 are twisted together to be substantially one, only one of the three unit cables c1, c2, and c3 ( For example, even if a failure such as dielectric breakdown occurs in c1), the unit cables of the accident phase (for example, c1) are in the state where the three unit cables c1, c2, and c3 are integrally twisted. Is separated from other unit cables (for example, c2 and c3), and it is very difficult to disconnect or reconnect only the unit cable (for example, c1) of the accident phase.

  Therefore, as shown in FIG. 15 (for the sake of simplicity, the unit cables c1, c2, and c3 are not twisted), even if a failure occurs in one unit cable (for example, c1). The three unit cables (c1, c2, and c3) were cut together, including the other two unit cables (for example, c2 and c3) that were in the healthy phase. Then, three unit cables for replacement are separately prepared, and the unit cables for replacement are arranged at the cut portions to connect the entire unit cables.

  However, in the above-described repair method of the power cable C (c1, c2, c3), for example, the unit cable (c1) in which the defect has occurred needs to be cut to a length of about 7 m. Since the two unit cables (c2 and c3) which are healthy phases are cut and discarded together, the expensive power cable C (c1, c2 and c3) is wasted, and resources are wasted. However, the cost was high.

  Also in the connection work, it is necessary to prepare three replacement unit cables separately and place the replacement unit cable at the cutting location to connect the entire unit cable. As shown in FIG. 15, in the power cable C (c1, c2, c3) disposed therein, the diameter of the connecting portion is increased by using a predetermined connecting member. The connection work of the three unit cables c1, c2, and c3 could not be performed, and the connection work had to be performed after shifting the connecting portion in the length direction. Therefore, the length of the three unit cables c1, c2, and c3 that need to be cut requires 21 m, which is three times the length of one unit, and it is troublesome to cut and connect the unit cables c1, c2, and c3. Tripled, which was a very expensive task.

  On the other hand, since the power cable C is manufactured by twisting three unit cables c1, c2, and c3, when only a part of the cable is twisted back, pressure is applied to the local part of the unit cables c1, c2, and c3. Would be intensively applied, adversely affecting the internal insulator and causing trouble.

  In addition, since the three unit cables c1, c2, and c3 are uniformly twisted in the manufacturing process of the power cable C, when only a part of the unit cables is forcibly twisted back, the repulsive force of the operator There was a risk that the hands and feet were caught in the unit cables c1, c2, and c3.

  Conventionally, a cable twisting tool as disclosed in Patent Document 1 has been proposed as a means for solving such an adverse effect.

This cable untwisting tool is composed of a holder, a plurality of mounting plates screwed into the holder by a mounting member, and a handle extending linearly radially outside the holder, The plurality of mounting plates are disposed at equal angles on the holder, and at least one mounting plate is provided with a knob integral with the mounting member, and the distance between the mounting plate and the cable is increased by the rotation of the knob. It is characterized by being adjustable.
JP 2001-258117 A

  However, in the conventional cable unwinding tool described above, the contact surface of the holder with the power cable C (c1, c2, c3) is a flat surface, and the power cable C (c1, c2, c3) is connected to this plane. Because of the gripping, the power cable C (c1, c2, c3) could not be gripped completely. The cable untwisting tool can be used for a small power cable C (c1, c2, c3) with a small diameter, but a high power cable C (c1, c2, c3) with a large twist and a large diameter. c3) has a problem that it cannot be used.

  Furthermore, in this cable twisting tool, in order to fully grasp the power cable C (c1, c2, c3), it is necessary to tighten the mounting plate very strongly. There was a possibility that the anticorrosion sheath, the water shielding layer, the shielding layer (wire shield or copper tape) of (c1, c2, c3) may be damaged, and there was a possibility of causing a secondary insulation failure.

  Therefore, the present invention was created in view of the conventional circumstances as described above, and is a power cable C (c1, c2, c3) in which a plurality of unit cables are strongly twisted to be integrated. However, it can be easily twisted back, and one unit cable (for example, c1) that is the accident phase can be separated from the other unit cables (for example, c2 and c3) that are the healthy phase, and can be safely repaired. An object of the present invention is to provide a power cable untwisting tool.

  A twisting tool for a power cable according to the present invention includes an outer frame that grips the power cable, and a plurality of pressing bodies that are arranged inside the outer frame via an adjustment mechanism, and is provided on the front side of the pressing body. The problem mentioned above was solved by providing the elastic body along the outer peripheral surface shape of the power cable.

  In addition, the power cable is formed by twisting a plurality of unit cables, and the elastic body of the pressing body that comes into contact with these unit cables is formed so as to follow the outer peripheral surface shape of the adjacent unit cables. The problem described above has also been solved.

  Furthermore, the elastic body of the pressing body is attached to the pressing body via a hard elastic body that is harder than the elastic body, thereby solving the same problem as described above.

  Further, the elastic body of the pressing body is formed of elastic rubber, and the hard elastic body is formed of hard rubber, thereby solving the above-described problem.

  In addition, since the three pressing bodies are arranged inside the outer frame, the above-described problem has been solved.

  The adjustment mechanism adjusts the distance between the outer frame and the pressing body, and a fixing rod provided with a thread is extended to the back side of the pressing body, while a through hole is provided in the outer frame and fixed. The above-mentioned problem has been solved by projecting the end portion of the flange to the outside of the outer frame, screwing the nut, and mounting the coil spring on the fixing rod of the pressing body positioned inside the outer frame.

  In addition, the outer frame is formed by two semicircular frame portions, one pressing body is disposed on one semicircular frame portion, and two pressing bodies are disposed on the other semicircular frame portion. By arranging, the same problem as described above was solved.

  The outer frame is formed by two semicircular frame portions, and pivotally attaches one end side portions of both semicircular frame portions to each other, and the other end portions of both semicircular frame portions. The above-mentioned problem has been solved by enabling the coupling.

  The power cable twisting tool according to the present invention includes an outer frame that grips the power cable and a plurality of pressing bodies that are disposed inside the outer frame via an adjustment mechanism. By attaching the cable at a predetermined position and rotating it in a predetermined direction, the power cable can be twisted back without difficulty.

  At this time, the unwinding tool for the power cable has an elastic body that conforms to the shape of the outer peripheral surface of the power cable on the front side of the pressing body. Touch. And by making the rotational pressure of an outer frame act on the whole outer peripheral surface of a power cable equally, a power cable can be twisted back without damaging a power cable.

  Further, the power cable is formed by twisting a plurality of unit cables, and the elastic body of the pressing body that comes into contact with these unit cables is formed so as to follow the outer peripheral surface shape of the adjacent unit cables. The power cable (a plurality of unit cables) can be firmly held by the pressing body including the elastic body. In this state, by applying the rotational pressure of the outer frame evenly to the entire outer peripheral surface of the power cable (multiple unit cables), the power cable (several unit cables) is not damaged. A plurality of unit cables) can be twisted back.

  Further, since the elastic body of the pressing body is attached to the pressing body through a hard elastic body harder than the elastic body, the outer frame attached to the power cable (a plurality of unit cables) is attached in a predetermined direction. When it is rotated, the elastic body and the hard elastic body are provided with moderate cushioning properties, and the rotational pressure of the outer frame can be firmly transmitted to the elastic body of the pressing body.

  Further, since the elastic body of the pressing body is formed of rubber having elasticity and the hard elastic body is formed of hard rubber, the outer frame attached to the power cable (a plurality of unit cables). Even when the cable is rotated in a predetermined direction with a relatively strong force, pressure is not applied only to a part of the power cable (a plurality of unit cables). That is, the elastic body having a predetermined cushioning property causes the rotational pressure of the outer frame to act evenly on the entire outer peripheral surface of the power cable (multiple unit cables), so the inside of the power cable (multiple unit cables) It does not adversely affect the insulator and eliminates the cause of trouble.

  In addition, since the three pressing bodies are arranged inside the outer frame, the pressing body is brought into contact with the entire outer peripheral surface of the power cable (a plurality of unit cables) from three directions, By applying rotational pressure evenly to the entire outer peripheral surface of the power cable (multiple unit cables), the anticorrosion sheath / waterproof layer / blocking layer (wire shield and copper tape) of the power cable (multiple unit cables) ), Etc., and the risk of secondary insulation failure is eliminated.

  The adjustment mechanism adjusts the distance between the outer frame and the pressing body, and extends the fixing rod provided with a thread to the back side of the pressing body, while the end of the fixing rod is attached to the outer frame. The bolt is screwed into the outer frame and a coil spring is attached to the fixing rod of the pressing body located inside the outer frame. The outer frame can be firmly attached not only to cables for use (a plurality of unit cables) but also to high-power cables (a plurality of unit cables) having a large twist and a large diameter.

  In addition, the outer frame is formed by two semicircular frame portions, one pressing body is disposed on one semicircular frame portion, and two pressing bodies are disposed on the other semicircular frame portion. Because it is arranged, by attaching both semicircular frame parts sandwiching the power cable (plural unit cables), the three elastic bodies are the entire outer peripheral surface of the power cable (plural unit cables) The power cable (several unit cables) is not damaged by applying the outer frame rotational pressure evenly to the entire outer peripheral surface of the power cable (several unit cables). A cable (a plurality of unit cables) can be twisted back.

  The outer frame is formed by two semicircular frame portions, and pivotally attaches one end side portions of both semicircular frame portions to each other, and the other end portions of both semicircular frame portions. Can be connected to the power cable (a plurality of unit cables), which makes it very easy to attach the outer frame to improve workability.

  In this way, in the power cable formed by twisting a plurality of unit cables by using the power cable twisting tool according to the present invention, only one unit cable in which a problem has occurred is generated. And can be cut and repaired, eliminating the need to cut other healthy unit cables.

  Also, in connection work, it is not necessary to prepare three unit cables separately, and it is sufficient to prepare one unit cable. For example, a power cable (a plurality of unit cables arranged in a trough) is sufficient. ), It is only necessary to secure a space for a connection portion for one phase, and there is no need to shift a plurality of connection portions in a plurality of unit cables in the length direction as in the prior art. Only 7 m, which is 1/3 of the above, is required, and an excellent effect is achieved in that an expensive power cable is not wasted.

  Furthermore, since only one unit cable is cut and repaired, the working time can be greatly shortened, and the repair cost can be greatly reduced.

  Further, kickback due to twisting back of the power cable (a plurality of unit cables) is eliminated, and safety in repairing the power cable (a plurality of unit cables) can be improved.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  As shown in FIGS. 1 to 3, the power cable twisting tool according to the present invention is arranged on the outer frame 1 that grips the power cable C and on the inner side of the outer frame 1 via the adjusting mechanism 2. It consists of a plurality of pressing bodies 3, and an elastic body 4 is provided on the front side of the pressing body 3 along the shape of the outer peripheral surface of the power cable C.

  As shown in FIGS. 1 and 2, the outer frame 1 is formed by two semicircular frame portions 1A and 1B, and one pressing body 3 (3a) is provided on one semicircular frame portion 1A. Are arranged, and two pressing bodies 3 (3b and 3c) are arranged on the other semicircular frame portion 1B. And each press body 3 (3a * 3b * 3c) is provided with the elastic body 4 (4a * 4b * 4c), respectively.

  As shown in FIG. 14, the power cable C is formed of three unit cables c1, c2, and c3. Specifically, the three unit cables c1, c2, and c3 are twisted together so that the outer peripheral surfaces of the adjacent unit cables c1, c2, and c3 are in contact with each other, and are substantially unified. The elastic bodies 4 (4a, 4b, 4c) of the pressing bodies 3 (3a, 3b, 3c) that are in contact with the power cable C (c1, c2, c3) are adjacent to each other as shown in FIGS. The unit cables c1, c2, and c3 are formed along the outer peripheral surface shape.

  Specifically, as shown in FIGS. 2 and 4, the elastic body 4 (4a, 4b, and 4c) includes a continuous contact surface 5 (5a, 5b, and 5) in which two small circular contact surfaces are connected. 5c). The continuous contact surfaces 5 (5a, 5b, 5c) abut on the outer peripheral surfaces of the unit cables c1, c2, and c3 constituting the power cable C without any gap.

  For example, as shown in FIG. 1, the continuous contact surface 5 (5a) of one pressing body 3 (3a) contacts the outer peripheral surfaces of the two unit cables c1 and c3. Further, the continuous contact surface 5 (5b) of the other pressing body 3 (3b) contacts the outer peripheral surface of the two unit cables c1 and c2. Furthermore, the continuous contact surface 5 (5c) of the other pressing body 3 (3c) contacts the outer peripheral surface of the two unit cables c2 and c3. Then, by causing the rotational pressure of the outer frame 1 (1A, 1B) to act evenly on the entire outer peripheral surface of the power cable C (c1, c2, c3), the power cable C (c1, c2, c3) is damaged. Can be twisted back without attaching.

  The elastic body 4 (4a, 4b, 4c) of the pressing body 3 (3a, 3b, 3c) that contacts the power cable C (c1, c2, c3) is an elastic synthetic rubber having a predetermined cushioning property. Or silicon rubber. Further, the elastic body 4 (4a, 4b, 4c) of the pressing body 3 (3a, 3b, 3c) is pressed through the hard elastic body 6 (6a, 6b, 6c) harder than the elastic body 4 (3a, 3b, 3c).・ It is attached to 3b and 3c).

  As shown in FIGS. 3 to 5, the pressing body 3 (3a, 3b, 3c) itself is composed of a rectangular curved plate 7 (7a, 7b, 7c) having a length obtained by dividing the circumference into three parts. The elastic body 4 (4a, 4b, 4c) is attached to the curved inner surface that is the front side of the curved plate 7 (7a, 7b, 7c) via the hard elastic body 6 (6a, 6b, 6c) made of hard rubber. It is attached.

  Moreover, the press body 3 (3a * 3b * 3c) is formed from metal materials, such as steel. Further, as shown in FIGS. 4 and 5, a fixing rod 8 (8 a, 8 b, 8 c) is extended on the curved outer surface that is the back side of the curved plate 7 (7 a, 7 b, 7 c). The fixing rod 8 (8a, 8b, 8c) constitutes a part of the adjusting mechanism 2 (2a, 2b, 2c).

  As shown in FIGS. 4 and 5, the adjusting mechanism 2 (2 a, 2 b, 2 c) is disposed on the curved outer surface that is the back side of the pressing body 3 (3 a, 3 b, 3 c). Adjustment mechanism 2 (2a * 2b * 2c) adjusts the distance between outer frame 1 (1A * 1B) and press body 3 (3a * 3b * 3c).

  This adjusting mechanism 2 (2a, 2b, 2c) is basically a fixed part provided with a thread 9 (9a, 9b, 9c) on the outer periphery and extending to the back side of the pressing body 3 (3a, 3b, 3c). It consists of a flange 8 (8a, 8b, 8c) and through holes 1Aa, 1Bb, 1Bc provided in the outer frame 1 (1A, 1B). Then, as shown in FIG. 5, the end of the fixed rod 8 (8a) is inserted into the through hole 1Aa of the outer frame 1 (1A), and the end of the fixed rod 8 (8a) is inserted into the outer frame 1 (1A). The nut 11 (11a) is screwed through the washer 10 (10a). In addition, a coil spring 13 (13a) is attached to the fixing rod 8 (8a) of the pressing body 3 (3a) located inside the outer frame 1 (1A) via two washers 12 (12a). .

  In this state, when the nut 11 (11a) is rotated to lengthen the end of the fixing rod 8 (8a) protruding outside the outer frame 1 (1A), the outer frame 1 (1A) and the pressing body 3 (3a) ) Is shortened, and the power cable C (c1, c2, c3) having a large diameter can be accommodated. Further, when the nut 11 (11a) is rotated to shorten the end of the fixing rod 8 (8a) protruding outside the outer frame 1 (1A), the outer frame 1 (1A) and the pressing body 3 (3a) The distance between them becomes long, and it becomes possible to cope with the power cable C (c1, c2, c3) having a small diameter.

  Through this adjustment mechanism 2 (2a, 2b, 2c), as shown in FIGS. 1 to 3, three pressing bodies 3 (3a, 3b, 3c) are placed inside the outer frame 1 (1A, 1B). Is attached. Further, by rotating the nut 11 (11a, 11b, 11c), the distance between the outer frame 1 (1A, 1B) and the pressing body 3 (3a, 3b, 3c) can be adjusted. According to the thickness of c1, c2, c3), the pressing body 3 (3a, 3b, 3c) can be arranged at the optimum position of the outer frame 1 (1A, 1B).

  The outer frame 1 is formed of a strong metal material such as steel. As shown in FIGS. 3 and 5, both end portions of the semicircular frame portions 1A and 1B constituting the outer frame 1 are bent horizontally to provide contact pieces 1AA and 1BB. The contact pieces 1AA and 1BB are provided with holes 1Ad and 1Bd. The contact pieces 1AA and 1BB of the semicircular frame portions 1A and 1B are brought into contact with each other, and the fixing bolt 14 is attached to the contact pieces 1AA and 1BB. The nuts 15 are inserted into the holes 1Ad and 1Bd and screwed together to fix the semicircular frame portions 1A and 1B.

  The contact pieces 1AA and 1BB are provided with square grip holes 1Ae and 1Be so that the contact pieces 1AA and 1BB of the semicircular frame portions 1A and 1B can be easily grasped by hand.

  Next, the repair work of the power cable using the twisting tool for the power cable formed as described above will be described.

  First, as shown in FIG. 6, the two outer frames 1 are arranged on both sides of the defective portion P of the power cable C (c1, c2, c3). The position of the outer frame 1 (1A, 1B) to be placed on the power cable C (c1, c2, c3) varies depending on the thickness of the power cable C (c1, c2, c3). Two outer frames 1 (1A and 1B) are arranged with an interval of 1 to 2 m from the center. This distance corresponds to the twist pitch interval of the power cable C (c1, c2, c3).

  At this time, the power cable C (c1, c2, c3) is disposed in the trough and the like, and at the time of repair, the power cable C (c1, c2, c3) is lifted onto the trough to perform repair work. .

  Next, as shown in FIG. 1, in each outer frame 1, the contact pieces 1AA and 1BB of both semicircular frame portions 1A and 1B are brought into contact with each other, and both semicircular shapes are formed using the fixing bolt 14 and the nut 15. The frame portions 1A and 1B are fixed. Further, the pressing body 3 (3a, 3b, 3c) has an adjustment mechanism 2 (2a) so that the position of the elastic body 4 (4a, 4b, 4c) matches the outer diameter of the power cable C (c1, c2, c3).・ 2b ・ 2c) is adjusted in advance, but if the position does not match, the nut 11 (11a, 11b, 11c) is adjusted again and the elastic body 4 (3a, 3b, 3c) of the pressing body 3 (3a, 3b, 3c) 4a, 4b and 4c) are aligned.

  Next, as shown in FIG. 7, the two outer frames 1 are rotated in opposite directions (in the direction of the arrow in the drawing) and in the direction of returning the twist of the power cable C (c1, c2, c3). Then, as shown in FIG. 8, the state where the twist is returned is maintained, and only the unit cable c1 in which the malfunction has occurred is separated from the other two healthy unit cables c2 and c3.

  Next, as shown in FIG. 9, a metal cutting protection plate 16 is installed on the healthy two unit cables c <b> 2 and c <b> 3, and the unit cable c <b> 1 in which a problem has occurred is cut using the cutter 17. . The cutting protection plate 14 prevents two healthy unit cables c2 and c3 from being cut or damaged by mistake when cutting the unit cable c1 in which a problem has occurred.

  Next, the two outer frames 1 attached to the power cable C (c1, c2, and c3) are removed. Then, the healthy two unit cables c2 and c3 return to the original twisted state.

  Further, the cut unit cable c1 is divided into two unit cables through the cut portion. Then, one unit cable c1 is rotated while being held by hand, and is cut again in a state where the unit cable c1 is pulled out by about 3.5 m from the two unit cables c2 and c3 twisted together. Further, the other unit cable c1 is also rotated while being held by hand, and is cut again in a state where the unit cable c1 is pulled out by about 3.5 m from the twisted two unit cables c2 and c3.

  Next, the cut unit cable c1 of about 7 m is removed, and the cut portion is connected with a new unit cable to complete the operation.

  The present invention is not limited to the embodiment described above, and other configurations can be adopted. For example, as shown in FIG. 10, the outer frame 1 may have a single-open structure. The outer frame 1 (1A, 1B) has two semicircular frame portions 1A, 1B which are pivotally attached to one end side portions of the two semicircular frame portions 1A, 1B using pins 18 so as to be pivoted. The other end portions of each other can be coupled using a fixing bolt 14 and a nut 15. In the power cable twisting tool configured as described above, the outer frame 1 (1A, 1B) is opened and closed, so that the outer frame 1 can be further attached to the power cable C (c1, c2, c3). It becomes easy and work efficiency improves.

  Further, as shown in FIGS. 11 and 12, a connection fixing portion 19 may be integrally formed on the outer frame 1 (1 </ b> B), and a grip piece 20 may be attached to the connection fixing portion 19. The connection fixing part 19 is provided with two screw holes 19a in a predetermined leg part. On the other hand, two holes 20a are also provided in the grip piece 20 formed in a long plate shape. Then, the bolt 21 is inserted into the hole 20 a of the grip piece 20, and the bolt 21 is screwed into the screw hole 19 a of the connection fixing portion 19 to fix the grip piece 20 to the connection fixing portion 19. As shown in FIG. 13, the two outer frames 1 configured in this way are attached to the power cable C (c1, c2, c3) so that the position of the grip piece 20 is opposite. Then, each unit cable c1 in which a problem has occurred is soundly rotated by rotating the cables C (c1, c2, c3) in the opposite directions (in the direction of the arrows) and returning the twists of the power cables C (c1, c2, c3). This is separated from the other two unit cables c2 and c3.

  In the present invention, even when the power cable C (c1, c2, c3) is strongly twisted, it can be easily twisted without adversely affecting the internal structure of the cable, and the unit cable c1 in which a problem has occurred is generated. As a power cable twisting tool that can be safely repaired separately from the other two healthy unit cables c2 and c3, it can be widely used in various constructions.

It is a decomposition | disassembly side view which shows the use condition of the twist back tool of the power cable which has attached the outer frame to the power cable. It is a side view which shows the state which both the outer frames which comprise the twist back tool of an electric power cable have left | separated. It is a disassembled perspective view which shows the state which both the outer frames which comprise the twist back tool of an electric power cable have left | separated. It is an expanded sectional view which shows the state which attached the press body to the outer frame via the adjustment mechanism. It is a disassembled perspective view which shows the state which attached the press body to the outer frame via the adjustment mechanism. It is a top view which shows the use condition which attached two outer frames to the power cable. It is a perspective view which shows the use condition which attached two outer frames to the power cable. It is a perspective view which shows the state which rotated the two outer frames and isolate | separated the unit cable in which the malfunction has generate | occur | produced from the healthy unit cable. It is a perspective view which shows the state which installs a cutting | disconnection protection board in the healthy unit cable, and cuts the unit cable in which the malfunction has generate | occur | produced. It is a side view which shows the structure of the outer frame of a single opening structure. It is a disassembled side view which shows the use condition of the untwisting tool of the power cable which has attached the outer frame provided with the handle to the power cable. It is a disassembled perspective view which shows the state which the outer frame provided with the handle has separated from the other outer frame. It is a perspective view which shows the use condition which attached two outer frames provided with the handle to the power cable. It is a perspective view which shows the structure of the power cable which twisted together the three unit cables. It is explanatory drawing which showed an example of the repair work of the conventional electric power cable.

Explanation of symbols

C Power cable c1 Unit cable c2 Unit cable c3 Unit cable P Defective location 1 Outer frame 1A Semicircular frame 1B Semicircular frame 1Aa Through hole 1Bb Through hole 1Bc Through hole 1AA Contact piece 1BB Contact piece 1Ad Hole 1Bd hole 1Ae gripping hole 1Be gripping hole 2 adjustment mechanism 2a adjustment mechanism 2b adjustment mechanism 2c adjustment mechanism 3 pressing body 3a pressing body 3b pressing body 3c pressing body 4 elastic body 4a elastic body 4b elastic body 4c elastic body 5 continuous contact surface 5a Continuous contact surface 5b Continuous contact surface 5c Continuous contact surface 6 Hard elastic body 6a Hard elastic body 6b Hard elastic body 6c Hard elastic body 7 Curved plate 7a Curved plate 7b Curved plate 7c Curved plate 8 Fixed rod 8a Fixed rod 8b Fixed rod 8c Fixed rod 9 Thread 9a Thread 9b Thread 9c Thread 10 Washer 10a Washer 11 Nut 11a Nut 11 b Nut 11c Nut 12 Washer 12a Washer 13 Coil spring 13a Coil spring 14 Fixing bolt 15 Nut 16 Cutting protection plate 17 Cutter 18 Pin 19 Connection fixing part 19a Screw hole 20 Grab piece 20a Hole 21 Bolt

Claims (8)

  It consists of an outer frame that grips the power cable and a plurality of pressing bodies that are arranged inside the outer frame via an adjusting mechanism, and an elastic body that follows the shape of the outer peripheral surface of the power cable is provided on the front side of the pressing body. A power cable untwisting tool characterized by comprising:   The power cable is formed by twisting a plurality of unit cables, and the elastic body of the pressing body that abuts on these unit cables is formed so as to follow the outer peripheral surface shape of the adjacent unit cables. The power cable twisting tool described.   The twisting tool for a power cable according to claim 1 or 2, wherein the elastic body of the pressing body is attached to the pressing body via a hard elastic body harder than the elastic body.   The twisting tool for a power cable according to any one of claims 1 to 3, wherein the elastic body of the pressing body is formed of rubber having elasticity, and the hard elastic body is formed of hard rubber.   The power cable twisting tool according to any one of claims 1 to 4, wherein three pressing bodies are arranged inside the outer frame.   The adjustment mechanism adjusts the distance between the outer frame and the pressing body. The adjustment mechanism extends a fixing rod provided with a thread to the back side of the pressing body, while providing a through hole in the outer frame, 2. A power cable unwinding tool according to claim 1, wherein an end portion projects outside the outer frame, a nut is screwed together, and a coil spring is attached to a fixing rod of the pressing body located inside the outer frame. .   The outer frame is formed by two semicircular frame portions, one pressing body is disposed on one semicircular frame portion, and two pressing bodies are disposed on the other semicircular frame portion. The power cable twisting tool according to claim 1.   The outer frame is formed by two semicircular frame portions, and pivotally attaches one end side portions of both semicircular frame portions and couples the other end side portions of both semicircular frame portions. The power cable twist-back tool according to claim 1 or 7, which is made possible.

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