JP2011155729A - Cable (core wire) untwisting tool, and cable (core wire) untwisting method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cable (core wire) untwisting tool that efficiently performs untwisting work of a large amount of control cables (core wires) in a short time for replacement of protective relays and reduces burden on workers, and to provide a cable (core wire) untwisting method using the cable (core wire) untwisting tool. <P>SOLUTION: In the cable (core wire) S untwisting tool A fitted to a rotary driving machine 1 such as a power drill, a shaft 3 to be mounted to the rotary driving machine is fixed to an elongated cable connection plate piece 2 formed with a connection hole 4 for temporarily fixing the cable (core wire) therein. Furthermore, a plurality of connection holes different in diameter are provided in the longitudinal direction of the cable connection plate piece. The end of the cable (core wire) is inserted from one side of the connection hole to cause the cable (core wire) to project from the other side of the connection hole such that the tip of the cable (core wire) arranged is directed to the shaft side of the cable connection plate piece. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention uses a cable (core wire) used to return each of the individual cables (core wires) constituting a control cable in replacement work of a protective relay that protects a power system such as a substation device or a distribution board. The present invention relates to a return jig and a cable (core wire) return method using the return jig of the cable (core wire).

  When carrying out replacement work of a protective relay that protects a power system such as a substation or a switchboard, a large number of control cables K are handled as shown in FIG. As the control cable K, a cable (core wire) S is formed by covering a conductor with a predetermined insulator, and a plurality of cables (core wires) S are combined together is generally used.

  The handling amount of the control cable K varies depending on the scale of construction. However, in the case of replacement of a recent digital protective relay, the number of cables (core wires) S needs to be changed in units of 1000 to 2000, for example. It has become.

  In recent years, digital protective relays are manufactured in a compact manner, and a space for storing a large amount of control cables K is very limited. Therefore, the individual cables (core wires) S constituting the control cables K are not limited. It is necessary to return more.

  In addition, in the inspection of the protective relay and the investigation at the time of trouble, if the individual cables (core wires) S constituting the control cable K are not returned, it is difficult to confirm the control cable K and there is a possibility of misunderstanding. .

  For this reason, conventionally, as shown in FIG. 9, an operator uses, for example, a tool P such as pliers to grasp the end of each cable (core wire) S constituting the control cable K, While pulling the core wire S forward, the tool P was rotated counterclockwise, and the cable (core wire) S was returned.

nothing special

  However, when replacing the protective relay, it is necessary to return a large amount of the core cable (core wire) S. Therefore, if this operation is carried out manually as in the prior art, it will take a long time for the work. It was a major factor that increased the cost.

  Further, as shown in FIG. 9, an operator uses the tool P such as pliers to grasp the end of each cable (core wire) S constituting the control cable K, and pulls the cable (core wire) S forward. The act of rotating the tool P counterclockwise has been a heavy burden on the worker.

  Furthermore, when such an action is performed continuously for a long time, the worker becomes tendonitis, which may adversely affect the health of the worker.

  Therefore, the present invention was created in view of the existing circumstances as described above. In the replacement work of the protective relay, the return of a large number of cables (core wires) constituting the control cable can be performed within a short time. To provide a cable (core wire) return jig that can be efficiently performed and reduce the burden on workers, and a cable (core wire) return method using this cable (core wire) return jig. With the goal.

  The present invention relates to a cable (core wire) return jig used by attaching to an electric rotary drive machine, and is an elongated cable provided with a connection hole for temporarily fixing the cable (core wire) The problem mentioned above was solved by fixing to the connecting plate piece the shaft to be mounted on the rotary drive.

  Moreover, the electric rotary drive machine was an electric drill, and thus solved the above-described problem.

  Furthermore, the above-mentioned problem was solved by providing a plurality of connection holes with different diameters along the longitudinal direction of the cable connecting plate.

  Moreover, the problem mentioned above was solved by fixing the shaft to the side surface of the cable connecting plate.

  In addition, the end of the cable (core wire) is arranged along the longitudinal direction of the cable connecting plate piece on the side surface where the shaft of the cable connecting plate piece exists, and the cable (core wire) is connected from one side of the connection hole. As described above, the end is inserted so that the cable (core wire) protrudes from the other side of the connection hole and the tip of the cable (core wire) faces the shaft side of the cable connecting plate. Solved the problem.

  Moreover, the connection hole of the cable connecting plate piece solved the above-described problem by forming the peripheral wall on one side of the front portion in an acute angle shape.

  In addition, as a method for returning the cable (core wire), the above-described problem has been solved by using the cable (core wire) return jig according to claim 1.

  Since the present invention is a jig for returning a cable (core wire) used by being attached to an electric rotary drive machine, a large amount of cables (core wire) constituting a control cable without manual work by an operator. Thus, the return can be efficiently performed within a short time.

  Also, as in the past, an operator uses a tool such as pliers to grab the end of each cable (core wire) and rotate the tool counterclockwise while pulling the cable (core wire) toward you. Since it is not necessary to perform the operation continuously, the burden on the worker in the replacement work of the protective relay can be greatly reduced.

  The cable (core wire) return jig according to the present invention fixes the shaft to be attached to the rotary drive machine to the elongated cable connecting plate piece. The return jig of (core wire) can be easily attached to the rotary drive.

  Also, since the elongated cable connecting plate piece is provided with a connection hole for temporarily fixing the cable (core wire), the cable (core wire) is connected to the cable connecting plate piece through this connection hole. Can be fixed very easily. And a cable (core wire) can be returned more easily by operating a rotation drive machine.

  Furthermore, when you have finished returning a specific cable (core wire), stop the rotary drive, pull out the cable (core wire) from the cable connection plate, and fix the next cable (core wire) easily. Thus, the cable (core wire) can be returned. Thus, by continuously returning the cable (core wire), the return of the large number of cables (core wire) constituting the control cable can be performed efficiently within a short time.

  Specifically, when the cable (core wire) is returned manually by a worker as in the prior art, a time of about 1 minute 30 seconds is spent per cable (core wire). For this reason, if the return operation of 2000 cables (core wires) is performed, about 50 hours are consumed.

  However, when the return jig for the cable (core wire) according to the present invention is used, the working time per cable (core wire) is about 30 seconds. For this reason, even when the return operation of 2000 cables (core wires) is performed, it takes about 17 hours, and the operation time can be greatly reduced.

  Furthermore, since the electric rotary drive machine is an electric drill, the cable (core wire) can be returned by using a tool that is familiar to workers on a daily basis. Therefore, no accident occurs during the work, and the cable (core wire) can be returned more safely.

  Further, since a plurality of connection holes having different diameters are provided along the longitudinal direction of the cable connecting plate pieces, even when various cables (core wires) having different diameters exist at the work site. A connection hole that is preferable for temporarily fixing individual cables (core wires) can be selected as appropriate so that the cable (core wire) can be returned more smoothly.

  In addition, since the shaft is fixed to the side surface of the cable connecting plate piece, when the shaft rotates while the cable (core wire) is fixed to the cable connecting plate piece, the cable connecting plate piece However, it rotates in a circular orbit that traces the peripheral wall of the cylinder. And since the cable (core wire) in which the shaft and the wire are present is positioned substantially linearly, the entire cable (core wire) may be shaken while the cable connecting plate piece is rotating. Therefore, the cable (core wire) can be returned more smoothly.

  In addition, the end of the cable (core wire) is arranged along the longitudinal direction of the cable connecting plate piece, the end of the cable (core wire) is inserted from one side of the connection hole, and the cable ( (Core wire) is projected, and the tip of the cable (core wire) is placed so as to face the shaft side of the cable connection plate. Pull the electric drill toward you and pull the cable (core wire) slightly. By doing so, the end portion of the cable (core wire) can be reliably fixed to the connection hole of the cable connecting plate piece.

  That is, by slightly pulling the cable (core wire), a part of the insulating portion of the cable (core wire) arranged to be bent in the connection hole strongly hits the connection hole, and the cable (core wire) hits the connection hole. As a result, the end of the cable (core wire) is securely fixed to the connection hole of the cable connecting plate piece. Therefore, even when the cable connecting plate piece is rotated at a high speed by the operation of the electric drill, the end portion of the cable (core wire) is not unexpectedly detached.

  Moreover, since the edge part of a cable (core wire) is arrange | positioned so that the longitudinal direction of the board piece for cable connection may be followed, the cable (core wire) which finished the return | restoration is also easy.

  Furthermore, since the connection hole of the cable (core wire) connecting plate piece is formed with an acute-angled peripheral wall on one side of the front portion, the cable (core wire) may be pulled slightly by pulling the electric drill forward. Then, even if the sharp-angled peripheral wall bites into the insulation part of the cable (core wire) and the cable connecting plate piece rotates at high speed by the operation of the electric drill, the cable (core wire) ) Is reliably prevented from happening such that the end of

  In addition, by adopting a cable (core wire) return method using the cable (core wire) return jig according to claim 1, a large number of cables (core wires) constituting the control cable are used. The return can be performed efficiently within a short time, and the overall construction cost can be greatly reduced.

  Also, as in the past, an operator uses a tool such as pliers to grab the end of each cable (core wire) and rotate the tool counterclockwise while pulling the cable (core wire) toward you. Since it is not necessary to perform the operation continuously, the burden on the worker in the replacement work of the protective relay is greatly reduced, and there is no possibility of adversely affecting the health of the worker such as that the worker becomes tendonitis. .

FIG. 6 is a perspective view showing a state in which the end portion of the cable (core wire) is arranged in a bent shape in the connection hole of the cable connecting plate piece in the cable (core wire) return jig attached to the electric drill. . The structure of the return jig of the cable (core wire) is shown, (a) is a plan view, (b) is a side view, (c) is a cross-sectional view taken along line XX of (a), and (d) is In the cross-sectional view of (c), a cross-sectional view in a state where the end portion of the cable (core wire) is bent in the connection hole, and (e) is a perspective view. The other structure (several connection holes) of the return jig | tool of a cable (core wire) is shown, (a) is a top view, (b) is a side view, (c) is XX of (a). (D) is a sectional view in a state in which the end portion of the cable (core wire) is arranged in a bent shape in the connection hole in the sectional view of (c), and (e) is a perspective view. The cable (core wire) end is bent in the connection hole of the cable connection plate piece in the return jig of the cable (core wire) of other configuration (shaft fixing position) attached to the electric drill. It is a perspective view which shows the state which is carrying out. The other structure (fixed position of a shaft) of the return jig | tool of a cable (core wire) is shown, (a) is a top view, (b) is a side view, (c) is a perspective view. It is a perspective view which shows the state in which the worker is performing the return operation | work of the cable (core wire) using the cable (core wire) return jig | tool attached to the electric drill. It explains the return work of the cable (core wire), (a) is a schematic showing a state where the return work of the cable (core wire) is being performed using the cable (core wire) return jig. A perspective view and (b) are perspective views which show the linear shape of the cable (core wire) which finished the return | restoration. It is a perspective view which shows the state from which many cables (core wire) which comprise a control cable are withdraw | derived from the protective relay which protects electric power systems, such as a transformation device and a switchboard. It is a perspective view which shows the state in which the worker is performing the return | restoration work of the cable (core wire) by the conventional method.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the present invention is a jig A for returning a cable (core wire) S that is used by being attached to an electric rotary drive machine 1.

  As shown in FIGS. 2A and 2E, the cable (core wire) S return jig A fixes the shaft 3 to be mounted on the rotary drive machine 1 to the elongated cable connecting plate piece 2 as shown in FIGS. Configured.

  As shown in FIGS. 2B, 2C, and 2E, the cable connecting plate piece 2 is formed in a thin plate shape having a predetermined length, and a connection hole 4 is provided in a front portion thereof. The connection hole 4 temporarily fixes the cable (core wire) S so that the end of the cable (core wire) S is hooked. Further, the connection hole 4 has a diameter that can handle a cable (core wire) S having a diameter of about 3.5 mm to 8 mm, which is handled in the replacement work of the protective relay.

  As shown in FIGS. 2A, 2 </ b> B, and 2 </ b> E, the shaft 3 is fixed to the rear side portion of the cable connecting plate piece 2 along the longitudinal direction of the cable connecting plate piece 2. . The shaft 3 is formed in, for example, a hexagonal columnar shape, and as shown in FIGS. 2B and 2E, a part of the tip side portion is welded or the like, and a cable connecting plate It is fixed to the side surface of the piece 2. The rear end portion of the shaft 3 protrudes from the cable connecting plate piece 2 and is attached to the electric rotary drive machine 1.

  As shown in FIG. 1, an electric drill 10 is used as the electric rotary drive machine 1 to which the return jig A of the cable (core wire) S according to the present invention is attached. The electric drill 10 includes a chuck portion 20 at a tip end portion. The chuck portion 20 is a portion that inserts the shaft 3 fixed to the cable connecting plate piece 2 into its own jaw portion and fastens and fixes the shaft 3.

  As shown in FIG. 1, when the operator pulls the operation switch 21 of the electric drill 10 with his / her finger while the shaft 3 is fixed to the chuck portion 20 of the electric drill 10, the shaft 3 rotates counterclockwise. Accordingly, the cable connecting plate piece 2 also rotates in the same direction.

  When the cable (core wire) S is temporarily fixed in the connection hole 4 of the cable connecting plate piece 2, as shown in FIGS. 1 and 2 (d), the shaft 3 in the cable connecting plate piece 2 exists. On the side surface, the end of the cable (core wire) S is arranged along the longitudinal direction of the cable connecting plate piece 2.

  Then, as shown in FIG. 2D, the end of the cable (core wire) S is inserted from one side of the connection hole 4, and the cable (core wire) S is protruded to the other side of the connection hole 4. At this time, the tip portion of the cable (core wire) S is arranged so as to face the shaft 3 side direction.

  In this state, when the electric drill 10 is pulled toward the front side to slightly pull the cable (core wire) S, the cable (core wire) arranged to be bent in the connection hole 4 as shown in FIG. ) A part of the insulating portion of S strongly hits the connection hole 4 so that the cable (core wire) S is caught in the connection hole 4, and the end of the cable (core wire) S is connected to the cable connecting plate 2 The connection hole 4 can be temporarily fixed.

  Further, as shown in FIG. 2C, the connection hole 4 of the cable connecting plate piece 2 is formed with an acute-angled peripheral wall 4a on one side in the front portion. The acute-angled peripheral wall 4a in the connection hole 4 is located on the surface side where the shaft 3 of the cable connecting plate piece 2 is present.

  For this reason, when the electric drill 10 is pulled toward the front side to slightly pull the cable (core wire) S, the acute-angled peripheral wall 4a bites into the insulating portion of the cable (core wire) S, and the cable (core wire) ) The end of S can be securely fixed to the connection hole 4 of the cable connecting plate piece 2.

  Further, in order to more securely fix the end portion of the cable (core wire) S, the other peripheral wall 4b in the rear portion of the connection hole 4 may be formed in an acute angle as shown in FIG. good. The acute-angled peripheral wall 4b in the connection hole 4 is located on the surface side where the shaft 3 of the cable connecting plate piece 2 does not exist.

  In addition, as shown in FIGS. 3A, 3B, 3C, and 3E, connection holes 4 and 5 having different diameters are provided along the longitudinal direction of the cable (core wire) connecting plate piece 2. May be.

  At this time, the connection hole 5 is formed to have a smaller diameter than, for example, the connection hole 4 and is used when fixing a thin cable (core wire) S as shown in FIG. . Further, the peripheral wall 5a on one side in the front portion of the connection hole 5 is formed in an acute angle shape, and the peripheral wall 5b on the other side in the rear portion is also formed in an acute angle shape, as in the case of the connection hole 4 described above. is there.

  Further, as shown in FIGS. 4, 5 </ b> A, 5 </ b> B, and 5 </ b> C, the shaft 30 may be fixed so as to straddle both side surfaces of the cable connecting plate piece 2.

  When using the jig A for returning the cable (core wire) S attached to the electric drill 10, the cable (core wire) is inserted into the connection hole 4 of the cable connecting plate piece 2 as shown in FIG. ) Arrange the end of S in a bent state.

  Next, as shown in FIGS. 6 and 7A, when an operator pulls the electric drill 10 toward the front side and slightly pulls the cable (core wire) S, as shown in FIG. A part of the insulating portion of the cable (core wire) S arranged to be bent in the connection hole 4 hits the connection hole 4 so that the cable (core wire) S is caught in the connection hole 4. The end of the cable (core wire) S is temporarily fixed in the connection hole 4 of the cable connecting plate piece 2.

  Next, when the operator pulls down the operation switch 21 of the electric drill 10 with the fingers of the hand, the shaft 3 rotates counterclockwise, and accordingly, the cable connecting plate piece 2 also rotates in the same direction. (Core wire) S twist is returned.

  When the return of the cable (core wire) S is completed, the worker stops pulling the cable (core wire) S and pulls out the end of the cable (core wire) S from the connection hole 4 of the cable connecting plate piece 2. The end portion of another cable (core wire) S is arranged in the connection hole 4 of the connection plate piece 2 in a bent state.

  By continuously performing such a series of actions, the replacement of the large number of cables (core wires) S constituting the control cable K is efficiently performed within a short time in the replacement operation of the protective relay, and FIG. As shown in (b), each cable (core wire) S can be formed into a straight straight line.

  As described above, in the present invention, in order to efficiently return the cable (core wire) S, the temporary fixing means of the cable (core wire) S to the cable connecting plate piece 2 and the electric drill 10 are provided. The rotating means of the used cable (core wire) S is devised.

  It should be noted that the present invention is not limited to the above-described embodiment, and all the improvements and modifications within the scope that can achieve the object of the present invention are included in the present invention.

  The cable (core wire) return jig according to the present invention and the cable (core wire) return method using the cable (core wire) return jig protect the power system such as transformers and switchboards. In addition to the replacement work of the protective relay, it is widely used in all work sites where the cable (core wire) needs to be returned.

A ... Returning jig K ... Control cable S ... Cable (core wire)
P ... Tool 1 ... Electric rotary drive 2 ... Cable connecting plate piece 3 ... Shaft 4 ... Connection hole 4a ... Surrounding wall 4b ... Surrounding wall 5 ... Connection hole 5a ... Surrounding wall 5b ... Surrounding wall 10 ... Electric drill 20 ... Chuck part 21 ... Operation switch 30 ... shaft

Claims (7)

  An elongated cable connecting plate piece for twisting a cable (core wire) that is used by being attached to an electric rotary drive machine and provided with a connection hole for temporarily fixing the cable (core wire) A cable (core wire) return jig for fixing a shaft to be mounted on a rotary drive machine.   The cable (core wire) return jig according to claim 1, wherein the electric rotary driving machine is an electric drill.   The cable (core wire) return jig according to claim 1, wherein a plurality of connection holes having different diameters are provided along the longitudinal direction of the cable connecting plate.   The cable (core wire) return jig according to claim 1, wherein the shaft is fixed to a side surface of the cable connecting plate.   On the side of the cable connecting plate piece where the shaft exists, place the end of the cable (core wire) along the longitudinal direction of the cable connecting plate piece, and connect the end of the cable (core wire) from one side of the connection hole. The cable according to claim 1, wherein the cable (core wire) is inserted and protruded from the other side of the connection hole, and the tip of the cable (core wire) is arranged so as to face the shaft side of the cable connecting plate piece. (Core wire) twisting jig.   6. The cable (core wire) return-use treatment according to claim 1, wherein the connection hole of the cable connection plate piece is formed with an acute-angled peripheral wall on one side in the front portion. Ingredients.   A cable (core wire) return method using the cable (core wire) return jig according to claim 1.

Images