JP2013009546A - Pre-crimping tool for indirect live-line processing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pre-crimping tool for indirect live-line processing capable of simply and swiftly performing an indirect live-line connection work using a connection sleeve.SOLUTION: The pre-crimping tool is used in a preparation work prior to a crimp-connection work to connect two wires by, after abutting the two wires in a connection sleeve, crimping the connection sleeve at both sides of the abutting point. The pre-crimping tool includes: an insulated operation rod 14 of a predetermined length; and a crimping section 12 which includes a pair of open/close pieces 20 and 22 attached to the front end of the insulated operation rod 14. The pair of open/close pieces 20 and 22 is made open or closed by the operation made on a grip and operation part 28 provided to the insulated operation rod 14. The close operation of the open/close pieces 20 and 22 makes the connection sleeve to perform a grip and crimping operation. A movable piece 20 of the crimping section 12 has a small projection 24 protruding in a direction generally identical to the close direction of the movable piece 20 at a portion where the grip and crimping operation is made on the connection sleeve.

Description

  The present invention relates to a temporary compression tool for an indirect hot wire method used in a pre-stage work of a main compression work in which an electric wire and an electric wire are connected using a connection sleeve by an indirect hot wire method.

  In the distribution path, there is a case where connection work between the electric wires is required due to the transformer replacement work or the like. For example, a high-voltage underline is an electric wire for drawing in a transformer from a high-voltage line installed between utility poles. When the transformer is suspended, the high-voltage underline and the primary-side electric wire of the transformer are connected. Connection work is required. This connection operation is usually performed by using a connection sleeve, butting the electric wires together in the connection sleeve, and compressing both sides of the abutted portion from the outside of the connection sleeve. A compression device used for this connection work is disclosed in Patent Document 1, for example.

  FIG. 4 is a schematic perspective view illustrating a state in which connection work is performed using the compression device 40 disclosed in Patent Document 1. The electric wires 84a and 84b are inserted into the connecting sleeve 82, the connecting sleeve 82 is compressed by the compression device 40, and the electric wires 84a and 84b are connected to each other.

  The connecting sleeve 82 is compressed at two places on both sides of the place where the electric wires 84a and 84b are brought together, but one place on the transformer side, that is, the electric wire 84a side on the primary side of the transformer is out of power. FIG. 4 shows a state in which the remaining one portion, that is, the high pressure underline 84b side is compressed by the indirect hot wire method.

  The compression device 40 has a compression pliers 44 attached to the tip of the insulating operation rod 42.

  In the compression work, a hook portion 46 attached to the tip portion of another insulating operation rod 42 is used.

  In the compression pliers 44, a stationary member 48 and a compression member 50 are axially attached, and a receiving portion 52 and a compression portion 54 are provided at the distal end portions of the respective members. A transmission member 56 is provided continuously to the compression member 50. Further, a traction member 58 is provided continuously to the transmission member 56, and the hook portion 46 is hooked on the ring member 60 provided at the tip of the traction member 58 and pulled in the direction of arrow A. By closing the compression member 50, the connection sleeve 82 sandwiched between the compression portion 54 and the receiving portion 52 is compressed.

  The above compression connection work is usually performed by two workers. One worker holds the Yachko 80 in both hands, and supports the electric wires 84a and 84b from below with the Yatco 80 holding the left hand and the right hand, respectively. The YATCO 80 is provided with a gripping portion 80a for gripping an electric wire at the distal end portion of the insulating operation rod 42. A gripping operation portion (illustrated) provided near the lower end portion (base end side) of the insulating operation rod 42. Is configured to be able to grip the electric wires 84a and 84b.

  An operator who performs the compression work correctly sets the connecting sleeve 82 into which the high-voltage underline 84b is inserted into either the receiving portion 52 of the stationary member 48 or the compression portion 54 of the compression member 50 described above. While operating, the insulation operating rod 42 with the hook portion 46 attached to the tip is operated in the direction of arrow A to close the compression member 50 and compress the connecting sleeve 82. The compression pliers 44 are configured so that the compression pliers 44 do not close unless the pulling member 58 is pulled with a certain strong force in the direction of the arrow A.

JP 2008-125291 A

  In the connection work using the compression device 40 of the above-mentioned Patent Document 1, when the connecting sleeve 82 is compressed, the hook portion 46 at the tip of the insulating operation rod 42 is hooked on the ring member 60 of the pulling member 58, Although it is necessary to perform a downward pulling operation, this pulling operation requires a certain amount of force as described above, and therefore, the burden on the operator supporting the electric wires 84a and 84b is large.

  That is, the compression device 40 has a predetermined size and weight, and special attention and caution are given to both the operator who operates the compression device 40 and the operator who supports the electric wires 84a and 84b with the YATCO 80 during the operation. It was required and the work was complicated. Once the electric wire 84b is detached from the connecting sleeve 82, the electric wire 84b needs to be reinserted into the connecting sleeve 82, and the operation takes a longer time.

  This invention is made in view of the said subject, The objective is for the indirect hot wire construction method which can achieve the simplification and speeding-up of the electric wire connection operation | work using the connection sleeve by an indirect hot wire method. It is to provide a temporary compression tool.

  In order to achieve the above object, the temporary compression tool for indirect hot wire construction according to claim 1 butts two electric wires in a connecting sleeve and compresses both side positions of the butt portion of the connecting sleeve. Used in the previous stage of the main compression connection operation for connecting the two electric wires, and is attached to the insulating operation rod having a predetermined length and the tip of the insulation operation rod, and also provided on the insulation operation rod. At least one of the clamping parts, and having two clamping pieces that are opened and closed by the operation of the gripping manipulation part, and a clamping part that clamps and compresses the connecting sleeve by the closing action of the opening and closing piece. The opening / closing piece has a small protrusion protruding in a direction substantially the same as the closing operation direction of the opening / closing piece at a portion where the clamping / compression operation is performed.

  According to this configuration, the connecting sleeve into which the electric wire has been inserted is set in the holding portion attached to the tip of the insulating operation rod, and the opening / closing piece of the holding portion is closed by the grip operation portion provided on the insulating operation rod. Then, the connecting sleeve is sandwiched and compressed by the small protrusions provided on the opening / closing piece. Therefore, the connection sleeve can be appropriately temporarily compressed with a simple configuration, and the compression work in the main compression work performed while preventing the wire from coming out of the connection sleeve can be simplified and facilitated. Work can be speeded up and made safe.

  The temporary compression tool for indirect hot wire construction method according to claim 2 is the temporary compression tool for indirect hot wire construction method according to claim 1, wherein the two opening / closing pieces of the sandwiching portion are formed with bifurcated tips. A fixed piece and a movable piece into which a tip portion enters a portion formed at the fork of the fixed piece during the closing operation, and the small protrusion is provided on the movable piece. Accordingly, since the small protrusion is provided on the movable piece, it is possible to accurately adjust the force applied by the gripping operation unit when temporarily compressing, and the temporary compression work of the connecting sleeve can be performed easily and satisfactorily. it can.

  The temporary compression tool for indirect hot wire method according to claim 3 is the temporary compression tool for indirect hot wire method according to any one of claims 1 or 2, wherein the small protrusion is the connection of the clamping portion. Two of the connecting sleeves are arranged in parallel at a predetermined interval in a direction substantially the same as the extending direction of the connecting sleeve in the state where the connecting sleeve is sandwiched. Therefore, when the connecting sleeve into which the electric wire is inserted is set in the holding portion and the holding portion is closed by the grip operation portion provided on the base end side, the connecting sleeve is formed by the two small protrusions provided in the holding portion. Are temporarily compressed at the same time. Accordingly, since both sides of the abutting portion of the electric wire can be temporarily compressed simultaneously by one clamping / compression operation, the connection work using the connection sleeve can be facilitated.

  The temporary compression tool for indirect hot wire construction method according to claim 4 is the temporary compression tool for indirect hot wire construction method according to any one of claims 1 to 3, wherein the tip surface of the small protrusion is substantially hemispherical convex. It is formed in a shape. Therefore, since the contact area between the small protrusion and the connecting sleeve is small, even if the operator's gripping force is small, the pinpoint can be compressed, so that temporary compression can be performed efficiently and appropriately.

  The temporary compression tool for indirect hot wire construction method according to claim 5 is the temporary compression tool for indirect hot wire construction method according to any one of claims 1 to 4, wherein the small protrusions are formed on the opening and closing pieces. It is configured to be detachable. Therefore, when the diameter, material, etc. of the connection sleeve to be temporarily compressed are different, it is possible to select the optimum small protrusion by preparing multiple types of small protrusions having different sizes in advance. It is possible to respond appropriately.

  According to the temporary compression tool for an indirect hot wire method of the present invention, the connecting sleeve can be temporarily compressed by a simple operation by the small protrusion provided on the grip portion. Therefore, it is possible to effectively prevent the wire from being disconnected during the main compression work without complicating the work, and the connection work using the connection sleeve can be simplified and speeded up. Cost can be reduced.

It is a schematic front view of the temporary compression tool for indirect hot wire construction methods concerning an embodiment of the invention. It is an expansion schematic perspective view of the clamping part of FIG. FIG. 2A shows an open state of the holding portion, and FIG. 2B shows a state where the connecting sleeve is held and compressed. It is explanatory drawing explaining the mode of the operation | work which temporarily compresses the connection sleeve using the temporary compression tool for indirect hot wire construction of FIG. It is a schematic perspective view explaining a mode that connection work is performed using the compression device indicated by patent documents 1.

  Hereinafter, an embodiment of a temporary compression tool for an indirect hot wire method of the present invention will be described in detail with reference to the drawings. FIG. 1: shows the front view of the temporary compression tool for indirect hot wire construction methods.

  A temporary compression tool 10 for the indirect hot wire method shown in FIG. 1 includes an insulating operation rod 14 having a sandwiching portion 12 attached to a distal end portion thereof, and a grip operation portion 28 provided in the vicinity of the proximal end portion of the insulating operation rod 14. Have. The grip operation unit 28 operates the opening / closing operation of the clamping unit 12. Hereinafter, each component will be described in detail.

  The insulating operation rod 14 is a columnar rod-shaped member made of an insulating material and has a predetermined length. In order to avoid creeping discharge and electric leakage, a rain gutter 16 and a hail 18 are provided. As described above, the clamping portion 12 is attached to the distal end portion, and the grip operation portion 28 is provided in the vicinity of the proximal end portion. The sandwiching portion 12 attached to the distal end portion is positioned at the working position by the insulating operation rod 14, and the gripping operation portion 28 is used to open and close the sandwiching portion 12.

  The grip operation unit 28 is provided in the vicinity of the proximal end portion of the insulating operation rod 14 and includes an operation lever 28a, a support fitting 28b, and a release lever 28c. An operation lever 28a is pivotally supported by a pin 28d on a support fitting 28b attached in the vicinity of the proximal end portion of the insulating operation rod 14. An auxiliary insulation operation rod 26 is connected to the operation lever 28a. When the operation lever 28a is operated to grip the auxiliary insulation operation rod 26, the auxiliary insulation operation rod 26 is pulled downward, and as a result, the movable piece 20 of the sandwiching portion 12 to be described later. Is configured to be closed.

  The operation lever 28a is maintained in the closed state of the holding portion 12 by a ratchet mechanism (not shown) built in the support fitting 28b. When the release lever 28c is pulled downward to release, the holding portion 12 is opened. Is configured to return. Further, the operation lever 28a is biased in a direction in which the clamping portion 12 is opened by a spring 28e which is a biasing means.

  The auxiliary insulating operating rod 26 is made of the same material as the insulating operating rod 14, and is similarly provided with a rain drain 16 and the like to prevent leakage and creeping discharge.

  FIG. 2 is an enlarged perspective view of a clamping portion of the temporary compression tool for the indirect hot wire method shown in FIG. However, FIG. 2A shows an open state of the clamping portion, and FIG. 2B shows a state where the clamping portion clamps and compresses the connecting sleeve.

  The clamping part 12 has two opening / closing pieces, that is, a movable piece 20 and a fixed piece 22. The fixed piece 22 is formed of a hard material, for example, a metal material, and its base portion 22a is fitted and fixed to the distal end portion of the insulating operation rod 14. A first straight portion 22b-1 is formed from the base portion 22a so as to extend substantially linearly in the upward direction and the outward direction with respect to the extending direction of the insulating operation rod 14. Continuing from the first straight line portion 22b-1, a second straight line portion 22b-2 extending at an angle to the outside is formed. Then, a third linear portion 22-3 that is continuous with the second linear portion 22b-2 and is bent inward by changing the direction of the bending is formed. The second straight portion 22b-2 and the third straight portion 22b-3 are given a predetermined angle, and the connecting sleeve 82 is locked to the bent portion C. Further, the third straight portion 22b-3 is formed in a bifurcated manner, and the distal end portion 20a of the movable piece 20 is configured to enter between the two third straight portions 22b-3.

  Similarly, the movable piece 20 is made of a hard material, for example, a metal material, and has a substantially arc shape or crescent shape. The movable piece 20 is pivotally attached to the upper portion of the base portion 22a of the fixed piece 22 at the connecting portion between the first straight portion 22b-1 and the second straight portion 22b-2, and is configured to be rotatable in the direction of arrow B. Has been. As described above, the distal end portion 20a of the movable piece 20 enters between the two third linear portions 22b-3 of the fixed piece 22, and the other end portion 20b of the movable piece 20 is connected to the auxiliary insulating operation rod 26. Yes. Thereby, the opening / closing operation | movement of the movable piece 20 is performed by operation of the holding | grip operation part 28 mentioned above.

  The small protrusion 24 is formed on the inner clamping surface of the movable piece 20 so as to protrude in the same direction as the closing direction. In FIG. 2, two small protrusions 24 are arranged side by side. The two small protrusions 24 are provided at two locations in substantially the same direction as the extending direction of the connecting sleeve 82 when the opening / closing piece sandwiches the connecting sleeve 82. In other words, the connection sleeve 82 is provided on both sides of the abutting portion of the electric wires 84a and 84b. With this configuration, both sides of the butt portion of the electric wire can be temporarily compressed simultaneously by a single clamping / compression operation. Further, since the small protrusions 24 are provided on the movable piece 20, it is possible to accurately adjust the force applied by the grip operation unit 28 when temporarily compressing. Furthermore, since the protrusion 24 is provided on the movable clamping unit 20, the operator can easily adjust the degree to which the connecting sleeve 82 is temporarily compressed. That is, the degree of temporary compression can be appropriately determined by the operator adjusting the gripping force according to the size of the electric wires 84a and 84b and the connecting sleeve 82 or the material of the connecting sleeve 82.

  Further, the small protrusion 24 is configured to be detachable from the movable piece 20. That is, the two small protrusions 24 are fixed to the base portion 25, but the base portion 25 is formed of a flexible member. Therefore, when the diameter, material, etc. of the connection sleeve 82 to be temporarily compressed are different, the optimum small protrusion 24 can be selected by preparing a plurality of types of small protrusions 24 having different sizes. It is possible to accurately respond on site.

  The connecting sleeve 82 is locked to a bent portion C between the second straight portion 22 b-2 and the third straight portion 22 b-3 of the fixed holding portion 22, and is provided by a small protrusion 24 provided inside the movable holding portion 20. Temporarily compressed. At this time, since the tip surface of the small protrusion 24 is formed in a substantially hemispherical convex shape, the connecting sleeve 82 is effectively compressed at a pinpoint. By temporarily compressing the connecting sleeve 82, the inserted wires 84a and 84b are prevented from coming out of the connecting sleeve 82 during the main compression work.

  Here, since the clamping part 12 is closed only by the operator's gripping force, the connecting sleeve 82 is compressed to such an extent that the electric wires 84a and 85b do not come out of the connecting sleeve 82 and do not reach the main compression. That is, temporary compression is performed. In addition, the above-described configuration of the sandwiching portion 12 can correspond to the connection sleeve 82 having various diameters, and the small protrusion 24 acts substantially at right angles to the circular cross section of the connection sleeve 82. Therefore, the connecting sleeve 82 having various diameters can be appropriately temporarily compressed with a simple configuration.

  FIG. 3 is an explanatory diagram showing a state in which the connecting sleeve 82 is temporarily compressed using the temporary compression tool 10 for the indirect hot wire method of the present embodiment. One worker operates the temporary compression tool 10 for the indirect hot wire method to temporarily compress the connecting sleeve 82. The other worker (assistant) performs the work of supporting the electric wires 84a and 84b inserted into the connecting sleeve 82 with the Yatsuko 80.

  An operator who holds the temporary compression tool 10 for the indirect hot wire construction method while the other operator supports the electric wires 84a and 84b with the YATCO 80, the second of the fixing piece 22 of the clamping portion 12 is held by the connecting sleeve 82. Temporary compression is performed by engaging the bent portion C of the straight portion 22b-2 and the third straight portion 22b-3 and grasping the operation lever 28a of the grip operation portion 28.

  The temporary compression is intended to compress only a part of the connecting sleeve 82 and prevent the electric wires 84 and 84b from coming out of the connecting sleeve 82, and does not require a strong force required for the main compression work. . Further, during the temporary compression work, a downward pulling force or the like is not applied to the connection sleeve 82, so that the burden on other workers supporting the wires 84a and 84b with the Yatsuko 80 is small. The connection sleeve 82 subjected to the temporary compression then enters the main compression operation. Since the electric wires 84, a, 84b do not come out of the connecting sleeve 82 during the main compression work, the burden on the operator who supports the electric wires 84a, 84b is lighter than in the conventional case where temporary compression is not performed. The compression work can proceed smoothly. That is, as in the prior art, the main compression work can be performed without paying special attention or caution. In particular, the work of inserting the electric wires 84a and 84b into the connecting sleeve 82 again is eliminated. Therefore, it is possible to easily and quickly perform the wire connection work using the connection sleeve 82.

  According to the temporary compression tool 10 for the indirect hot wire method of the present embodiment, the connection sleeve 82 can be temporarily compressed by a simple operation by the small protrusions 24 provided on the grip portion 12. The temporary compression can be appropriately performed by the operator adjusting the gripping force in accordance with the diameter of the electric wires 84a and 84b and the connecting sleeve 82, the material of the connecting sleeve 82, or the like. Accordingly, since the temporary compression is appropriately performed, the compression work in the main compression work performed while preventing the wire from coming out of the connection sleeve can be simplified and facilitated, and the wire connection work can be made quicker and safer. Figured.

  Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the clamping part 12 has a fixed piece 22 and a movable piece 20, and the fixed piece 22 has a first straight part 22b-1, a second straight part 22b-1, and a third straight part 22b-3. Although the movable piece 20 illustrated the thing of the substantially crescent shape, it is not concerned with this shape. For example, a configuration in which the planar member and the planar member sandwich the connecting sleeve 82 as in the clamping portion 80a of the YATCO 80 may be employed.

10 Temporary compression tool for indirect hot wire method 12 Clamping part 14 Insulation operation rod 16 Rain gutter 18 鍔 20 Movable piece (open / close piece)
22 Fixed piece (opening and closing piece)
22a Base 22b-1 First straight portion 22b-2 Second straight portion 22b-3 Third straight portion 24 Small protrusion 25 Base 26 Auxiliary insulation operation rod 28 Grip operation portion 28a Operation lever 40 Compression device 42 Insulation operation rod 44 Compression pliers 52 Receiving part 54 Compression part 82 Connection sleeve 84a, 84b Electric wire

Claims (5)

Two wires are butted in the connecting sleeve, and used for the pre-stage operation of the main compression connecting operation of compressing the positions of both sides of the butting portion of the connecting sleeve to connect the two wires,
An insulation operating rod of a predetermined length;
There are two opening / closing pieces attached to the tip of the insulating operation rod and opened / closed by operation of a gripping operation portion provided on the insulation operation rod. A clamping unit that performs clamping and compression operations,
At least one open / close piece of the clamping portion includes
A temporary compression tool for an indirect hot wire method, characterized in that a small protrusion projecting in a direction substantially the same as the closing operation direction of the opening / closing piece is provided at a portion where the clamping / compression operation is performed. The two opening / closing pieces of the clamping part are:
A fixed piece having a bifurcated tip,
A movable piece into which a tip portion enters a portion formed at the fork of the fixed piece during the closing operation;
The temporary compression apparatus for an indirect hot wire method according to claim 1, wherein the small protrusion is provided on the movable piece. The small protrusion is
3. The device according to claim 1, wherein two pieces are arranged in parallel at a predetermined interval in a direction substantially the same as an extending direction of the connection sleeve in the state in which the connection sleeve is clamped by the clamping portion. The temporary compression tool for indirect hot wire construction described.   The temporary compression tool for an indirect hot wire method according to any one of claims 1 to 3, wherein a tip surface of the small protrusion is formed in a substantially hemispherical convex shape.   The temporary compression tool for an indirect hot wire method according to any one of claims 1 to 4, wherein the small protrusion is configured to be detachable from the opening and closing piece.

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