JP6771957B2 - Cutting device for jumper wire connection of retaining clamp and transmission line replacement or removal method using this - Google Patents

Description

According to the present invention, when the old line of the transmission line is replaced with a new line, the jumper line of the retaining clamp is connected in order to tow the new line by the old line and allow the gold wheel suspended at the steel tower to pass smoothly. It relates to a device for cutting a part and a method of replacing or removing a transmission line using the device.

When replacing an old transmission line supported by a large number of tension towers with a new transmission line, connect the new line to the end of the old line and pull the old line from the other end to create a large number of tension towers. There is a construction method to extend a new line in between. However, the ends of the transmission lines between the tension towers are fastened by the retention clamps supported by the tension towers, and the transmission lines of adjacent spans are connected to each other at the jumper wire connection of the retention clamps at both ends. It is connected by the connected jumper wire.

Then, in the above construction method, these jumper wires are removed from the retention clamps, adjacent retention clamps are connected to each other with split wires, and one transmission line is hung on a gold wheel suspended from each tension tower as one transmission line. It is a method of pulling from. However, since the jumper wire connecting portion of each of the retaining clamps is projected on one side in the shape of a battledore, it cannot pass through each of the metal wheels.

Therefore, conventionally, the transmission line in front of each retention clamp is cut, a short rod-shaped extension clamp is connected to the cut end of the transmission line, and adjacent extension clamps are connected to each other with a split wire to form a single transmission line. Then, these are hung on a gold wheel hung on each tension tower and pulled from one end, the old line is removed, and the new line is extended and replaced.

However, it is troublesome to remove the retaining clamp, connect the wire drawing clamp, and connect the adjacent wire drawing clamp with a split wire. Therefore, before towing, the old wire is passed through the metal wheel of each tension tower with the jumper wire connection portion of each retention clamp cut so that there are no protrusions on the outer circumference of the retention clamp, and between the tension towers. A method such as extending a new line was developed.

The cutting device of the jumper wire connection portion is shown in Patent Document 1 and Patent Document 2.

For the "jig for cutting the battledore portion of the retaining clamp" of Patent Document 1, a frame having legs provided at both ends of the rectangular rod is prepared, and cuts that can be inserted and fitted at predetermined positions of the retaining clamp are provided at the ends of both legs. Is inserted, a groove in the direction perpendicular to the rectangular rod is drilled in the lower part of the block that can slide along the rectangular rod, and the sliding plate is slidably inserted, and this sliding plate is axially inserted into the back surface of the press. It is fixed, the press can be moved in two directions at right angles, and when both legs of the frame are inserted and locked in the retaining clamp, the facing cutting edge of the press is in the same plane as the axis of the retaining clamp. is there.

Further, in Patent Document 2, "a cutting device for a jumper wire connection portion of a retention clamp", a cutting tool for making a cut in the retention clamp is a jumper via a guide rail extending in parallel with the retention clamp from a mounting bracket fixed to the retention clamp. It is located at the line connection. The cutting tool is movably supported by a guide body on a guide rail. The fixed blade unit and the movable blade unit are attached to the opposite parts of the portable hydraulic press fixed to the guide body. Each unit is integrally connected to the horizontal cutting blade, the intermediate piece, and the vertical cutting blade through the rotating shaft, and is movably supported by the mounting member fixed to the frame. If one of the vertical cutting blade and the horizontal cutting blade is fixed at a predetermined cutting operation position by an engaging pin that appears and disappears in the groove of the mounting member, the other can be reversed at the retracted position so that the cutting edges do not abut each other. It does not interfere with the operation.

Japanese Unexamined Patent Publication No. 09-135511 Japanese Unexamined Patent Publication No. 2008-109801

In each of the cutting devices of Patent Documents 1 and 2, a notch is made by a hydraulic press in the longitudinal direction of the clamp including the jumper wire connecting portion of the retaining clamp and the circumference of the clamp inside the clamp, respectively, and the aluminum sleeve of the retaining clamp. It breaks the part. Therefore, the cutting tools must be arranged in a direction perpendicular to the longitudinal direction of the retaining clamp, and the opposing blades of the cutting tools must be brought close to each other to break the side surface portions of the aluminum sleeve, which face each other. The reaction force receiver of the blade is in the direction perpendicular to the retention clamp, which is unstable. Further, in either case, two sets of a horizontal cutting blade and a vertical cutting blade must be prepared.

Moreover, in Patent Document 1, the horizontal cutting blade and the vertical cutting blade must be replaced and mounted one by one. Further, in Patent Document 2, the horizontal cutting blade and the vertical cutting blade are integrated, but these must also be replaced. That is, the engaging pin must be pulled out, the horizontal cutting blade and the vertical cutting blade must be slid in the fitting hole of the mounting member to refit the engaging pin at a predetermined position, and the position must be changed. In this way, it takes time and effort to cut the retaining clamp.

Therefore, according to the present invention, the connection portion of the jumper wire of the retaining clamp can be cut extremely easily and surely, the cutting outer diameter is circular, and the cutting device can smoothly pass through the metal wheel, and the old and new transmission lines using the cutting device. It provides a method of re-covering or removing transmission lines.

The invention of claim 1 has a fixed support having a fixed-length tubular fixing frame that covers and fixes the sleeve portion of the retention clamp, and an arm-shaped fixing frame that is supported by the tubular fixing frame and projects along an electric wire. A movable frame slidably supported along the body and the arm-shaped fixed frame of the fixed support, and a cylindrical fixed frame of the fixed support supported by the movable frame. It is composed of a sliding support composed of a sliding rotary cylinder that is rotatably crowned, and the fixed support has a tubular fixed frame that can be removed by splitting it in half at the top and bottom and can be fixed. A cutting cylinder having an inner peripheral diameter slightly larger than the sleeve outer peripheral diameter of the retaining clamp and having an annular cutting blade on the tip surface is integrally provided at the tip of the sliding rotary cylinder of the dynamic support via a step portion. The sliding rotary cylinder and the cutting cylinder are split into upper and lower halves and are detachably fixed, and a rotary drive means for rotating the sliding rotary cylinder is provided on the movable frame, and a sliding drive means for moving the movable frame. Is provided on the arm-shaped fixed frame, and the sliding drive means slides the movable frame in the direction of the jumper wire connection portion of the retention clamp, and the rotation drive means rotates the sliding rotary cylinder and the cutting cylinder. A cutting device for the jumper wire connection of the retaining clamp, which is configured to allow cutting and cutting near the jumper wire connection of the clamp.

The retention according to claim 1, wherein the sliding drive means is an operation handle whose one end is pivotally supported by an arm-shaped fixed frame and the middle portion is pivotally supported by the movable frame. It was used as a cutting device for the jumper wire connection of the clamp.

Further, the invention of claim 3 is a cutting device for a jumper wire connection portion of a retention clamp according to claim 1 or 2, wherein the rotation driving means is an electric motor.

Further, in the invention of claim 4, the first gear is provided on the outer periphery of the rear end portion of the sliding rotary cylinder, and the second gear provided on the rotating shaft of the electric motor is meshed with the first gear. The jumper wire connection portion of the retention clamp according to claim 3 was used as a cutting device.

Further, according to the invention of claim 5, when removing a transmission line between a plurality of tension towers of a transmission line, a retaining clamp supported by each tension tower is connected by a split wire, and the gold of each tension tower is formed. In the method of passing the power transmission line through a car, the jumper wire of each retention clamp is removed, the cutting device according to any one of claims 1 to 4 is fixed to each retention clamp, and the jumper wire connection portion is connected by the cutting device. After disconnecting and removing, connect the adjacent retention clamp with a split wire, pull the transmission line from one end of the transmission line, pass it through each of the gold wheels, and remove the transmission line, replace the transmission line, or It was a removal method.

According to the invention of claim 1, the tubular fixing frame of the fixed support is attached to the outer periphery of the linear sleeve portion of the retention clamp, and the outer periphery of the tubular fixing frame has an annular cutting blade at the tip. The sliding rotary cylinder is covered with a dynamic rotary cylinder, and the sliding rotary cylinder is brought close to the jumper wire connecting portion provided at one end of the sleeve portion of the retention clamp while rotating, and the cutting blade is used for cutting with the annular cutting blade. The reaction force receiver of the pressure on the jumper wire connection part is the tubular fixed frame, and the reaction force receiver is firmly fixed to the retention clamp, stable cutting is performed, and the jumper wire connection part is securely connected. Can be separated.

Further, the tubular fixed frame, the sliding rotary cylinder, and the cutting cylinder are each divided into two parts, so that the cutting device can be easily attached to and detached from the retaining clamp.

Further, according to the second aspect of the present invention, by sliding the movable frame with respect to the arm-shaped fixed frame with the operation handle, it can be easily and surely performed by the action of the lever. Further, in the invention of claim 3, since the sliding rotary cylinder is driven and rotated by an electric motor, it can be easily rotated without any labor and can be reliably cut by the cutting blade at the tip of the sliding rotary cylinder. it can.

Further, according to the invention of claim 4, since the first gear and the second gear are meshed with each other to transmit the rotation of the electric motor to the sliding rotary cylinder, the rotational force can be reliably transmitted. it can.

Further, according to the invention of claim 5, when the old line of the transmission line is hung on a gold wheel provided in each tension tower and removed, the jumper wire connection portion of each retention clamp is easily cut and cut. Since the remaining portion becomes a circular shape having substantially the same shape as the sleeve portion of the retaining clamp, the metal wheel can be smoothly passed.

It is a front view of the state where the cutting device of Embodiment 1 of this invention is attached to the retention clamp. It is a top view of the state which attached the cutting device of Embodiment 1 of this invention to a retention clamp. It is a left side view of the state where the cutting device of Embodiment 1 of this invention is attached to the retention clamp. It is sectional drawing of the state which attached the cutting apparatus of Embodiment 1 of this invention to a retention clamp. It is an exploded perspective view before attaching the cutting apparatus of Embodiment 1 of this invention to a retention clamp. It is a perspective view seen from the oblique rear with the cutting device of Embodiment 1 of this invention attached to the retention clamp. It is a perspective view seen from the oblique rear with the cutting device of Embodiment 1 of this invention attached to the retention clamp, and the member of the upper half removed. FIG. 5 is a perspective view seen from diagonally rearward in a state where the cutting device of the first embodiment of the present invention is attached to a retention clamp and the retention clamp is cut. FIG. 5 is a perspective view seen from diagonally rearward in a state where the cutting device of the first embodiment of the present invention is attached to a retention clamp, the retention clamp is cut, and the upper half member is removed. It is a perspective view of the retention clamp using the cutting device of Embodiment 1 of this invention. It is a front view which cut the jumper connection part of the retention clamp using the cutting device of Embodiment 1 of this invention. It is 1st process explanatory drawing of the power transmission line removal method using the cutting device of Embodiment 1 of this invention. It is a 2nd process explanatory drawing of the power transmission line removal method using the cutting device of Embodiment 1 of this invention. It is a 3rd process explanatory drawing of the power transmission line removal method using the cutting device of Embodiment 1 of this invention. FIG. 5 is an explanatory diagram of a fourth step of a method for removing a transmission line using the cutting device of the first embodiment of the present invention. FIG. 5 is an explanatory diagram of a fifth step of a method for removing a power transmission line using the cutting device of the first embodiment of the present invention.

First, as shown in FIG. 10, the retention clamp A using the cutting device B of the jumper wire connection portion of the retention clamp A according to the first embodiment of the present invention has a substantially rod-shaped sleeve that grips an electric wire inside. It is composed of a portion A1 and a battledore-shaped jumper wire connecting portion A2 provided at the end of the sleeve portion A1.

Next, the cutting device B of the jumper wire connection portion of the retention clamp A of the first embodiment of the present invention will be described with reference to FIGS. 1 to 9.

The fixed support 1 is fixed to the outer periphery of the sleeve portion A1 of the retaining clamp A, and the fixed support 1 is a tubular fixing frame 2 that covers and fixes the sleeve portion A1 of the retaining clamp A, and the cylinder. It is composed of a substantially gutter-shaped arm-shaped fixing frame 3 that is supported by the shape-fixing frame 2 and projects along the electric wire C.

The tubular fixing frame 2 is divided into two parts consisting of upper and lower semi-cylindrical covers 2a and 2b. The sleeve portion A1 of the retaining clamp A is covered with the lower semi-cylindrical cover 2a and then the upper semi-cylindrical cover 2b. , The upper and lower tubular covers 2a and 2b are integrally fixed by screws. Further, these semi-cylindrical covers 2a and 2b are fixed to the sleeve portion A1 by pressing the outer periphery of the sleeve portion A1 with the pressing screws 2c protruding from the inner circumferences of the semi-cylindrical covers 2a and 2b, respectively. ing. Further, as a result, the tubular fixing frame 2 is firmly fixed to the outer periphery of the sleeve portion A1 of the retaining clamp A.

Further, the arm-shaped fixing frame 3 having a substantially gutter shape projects rearward along the electric wire C from the lower rear end of the tubular fixing frame 2. The arm-shaped frame 3 is supported by the tubular fixed frame 2.

Further, a sliding support 4 supported by the fixed support 1 is provided. The sliding support 4 includes a substantially receiving plate-shaped movable frame 5 slidably supported along the arm-shaped fixed frame 3 under the arm-shaped fixed frame 3 of the fixed support 1 and the movable frame 5. It is composed of a sliding rotary cylinder 6 that is supported by the frame 5 and is rotatably crowned on the outer periphery of the tubular fixed frame 2 of the fixed support 1.

The movable frame 5 has a receiving plate shape wider than the arm-shaped fixed frame 3, has the arm-shaped fixed frame 3 as a rail, and has a fitting portion 5a that is slidably fitted to the rail. .. Further, a box body 7 having an open upper portion hangs down from the front end of the movable frame 5, and the box body 7 is integrated with the movable frame 5. Further, the sliding rotary cylinder 6 has a flange portion 6a integrally on the outer periphery of the rear portion, and the first gear 8 is fixed to the rear end surface of the flange portion 6a on the outer circumference of the sliding rotary cylinder 6. It is provided.

Further, an electric motor 9 is provided on the rear end surface of the box portion 7, the rotating shaft of the electric motor 9 projects into the box body 7, and the second gear 10 is fixed to the rotating shaft in the box body 7. , The first gear 8 and the second gear 10 are meshed with each other. Further, a lid case 7a that covers the flange portion 6a and the first gear 8 is detachably provided in the upper opening of the box body 7. However, although the lid case 7a is shown by a alternate long and short dash line in FIG. 1, it is not shown in other drawings. The box body 7 and the sliding rotary cylinder 6 move integrally, and only the sliding rotary cylinder 6 is rotatable.

Further, the tip of the sliding rotary cylinder 6 is provided with an annular step portion 6b in front of the tubular fixing frame 2 and has a reduced outer diameter, and the rear portion is fixed to the outer periphery of the annular step portion 6b. A cutting cylinder 11 is provided. The cutting cylinder 11 has an inner peripheral diameter slightly larger than the outer peripheral diameter of the sleeve portion A1 of the retaining clamp A, and has an annular cutting blade 11a on the tip surface. The cutting cylinder 11, the sliding rotary cylinder 6, and the first gear 8 are divided into two parts, which are composed of two upper and lower members, and these are integrally joined by screws.

Further, a rod-shaped operation handle 12 having one end portion 12a pivotally supported on the shaft 3a provided on the arm-shaped fixed frame 3 is provided. An elongated hole 13 is formed slightly from the central portion of the operation handle 12 to a portion slightly from the one end portion 12a, and the tip of the pillar body 14 erected on the upper surface of the movable frame 5 is pierced through the elongated hole 13. ..

Further, in a state where the sliding rotary cylinder 6 is completely covered on the outer circumference of the tubular fixed frame 2, that is, in the state of FIGS. 1 and 4, the operation handle 12 has a free end as shown in FIG. Projects diagonally rearward of the movable frame 5. Then, when the free end of the operation handle 12 is pushed forward of the movable frame 5, the pillar body rotates around the shaft support portion of the shaft 3a at one end of the operation handle 12, and is pierced through the elongated hole 13 accordingly. 14 is pushed, and the movable frame 5, which is a support of the pillar 14, moves along the arm-shaped fixed frame 3.

As a result, the sliding rotary cylinder 6 and the cutting cylinder 11 supported by the box body 7 integrated with the movable frame 5 project forward of the tubular fixed frame 2. Further, when the electric motor 9 is driven and rotated, the second gear 10 fixed to the rotating shaft rotates, the first gear 8 meshing with the second gear 10 rotates, and the sliding rotary cylinder 6 becomes the tubular fixed frame 2. The cutting cylinder 11 and the cutting blade 11a at the tip of the rotating cylinder 11 rotate around the outer circumference of the blade.

Then, the cutting blade 11a approaches the jumper wire connecting portion A2 of the retaining clamp A, is further pressed by the jumper wire connecting portion A2, bites into the jumper wire connecting portion A2, and cuts the connecting portion A2 in a circular shape. Therefore, as shown in FIG. 11, the retaining clamp A from which the jumper wire connecting portion A2 is cut off has a circular shape slightly larger than the outer diameter of the sleeve portion A1.

Next, a method of removing the transmission line supported by the tension tower using the cutting device B will be described with reference to FIGS. 12 to 16.

As shown in FIG. 12, the transmission line has a retention clamp A fixed to the end of the transmission line 22 connected to the tip of the ridge 21 supported by the tension tower 20. The left and right power transmission lines 22 of the tension tower 20 are connected by jumper wires 23 connected to the jumper wire connection portions of the retention clamps A.

Therefore, as shown in FIG. 13, the jumper wire 23 is removed from the jumper wire connection portion of each retention clamp A. Then, as shown in FIG. 14, the jumper wire connecting portion A2 of each retaining clamp A is cut by using the cutting device B (not shown).

Then, as shown in FIG. 15, a cam along 24 is attached to the transmission line 22 in front of each of the retention clamps A, and a semi-wire 25 is attached between the insulator chain 21 and the cam along 24 to increase the tension of the transmission line 22. Transfer to cam-along 24, semi-wire 25 and insulator 21.

Further, the left and right jumper wire connecting portions of the tension tower 20 are connected to each other with split wires 26, and the metal wheel 27 is suspended from the tension tower 20. The split wire 26 is passed through the wire 26. After that, the cam-along 24, the semi-wire 25, and the insulator chain 21 are removed, and as shown in FIG. 16, the left and right transmission lines 22 of the tension tower 20 have the split wire 26 connected to the retention clamp A at each end thereof. It is connected via a single transmission line 22, passes through a metal wheel 27 of each tension tower 20, is pulled to one end of the transmission line 22, and is removed.

In this way, the jumper wire connection portion A2 of the retention clamp A connected to the transmission line 22 is cut off, and the remaining portion has a circular cross section, so that it can easily pass through the gold wheel 27.

In the above embodiment, the rotary drive means is the electric motor 9, but the present invention is not limited to this, and an appropriate rotary drive means such as an engine may be used. Further, although the sliding drive means is an operation handle 12 using the principle of leverage, an electric sliding drive means or the like other than the operation handle 12 may be used.

A Retention clamp A1 Sleeve part A2 Jumper wire connection part B Cutting device C Wire 1 Fixed support 2 Cylindrical fixing frame 2a Lower tubular cover 2b Upper tubular cover 2c Pressing screw 3 Arm-shaped fixing frame
3a Axis 4 Sliding Support 5 Movable Frame 5a Fitting Part 6 Sliding Rotating Cylinder 6a Flange Part 6b Ring Step 7 Box Body 8 First Gear 9 Electric Motor
10 2nd gear 11 Cutting cylinder
11a Cutting blade 12 Operation handle 12a One end 13 Long hole 14 Pillar body 20 Tension tower 21 Insulator line 22 Transmission line 23 Jumper wire 24 Cam along 25 Semi-wire 26 Split wire 27 Gold wheel

Claims (5)

A fixed support having a fixed length tubular fixed frame that covers and fixes the sleeve portion of the retaining clamp, an arm-shaped fixed frame that is supported by the tubular fixed frame and projects along an electric wire, and the fixed support. The arm-shaped fixed frame was slidably supported along the arm-shaped fixed frame, and the movable frame was supported by the movable frame and rotatably crowned by the tubular fixed frame of the fixed support. It is composed of a sliding support consisting of a sliding rotary cylinder.
The fixed support has a tubular fixed frame that can be removed in half and can be fixed freely.
A cutting cylinder having an inner peripheral diameter slightly larger than the sleeve outer peripheral diameter of the retention clamp and having an annular cutting blade on the tip surface is integrally provided at the tip of the sliding rotary cylinder of the sliding support via a step portion. , The sliding rotary cylinder and the cutting cylinder are split in half and fixed detachably.
A rotary drive means for rotating the sliding rotary cylinder is provided on the movable frame, and a sliding drive means for moving the movable frame is provided on the arm-shaped fixed frame.
Cutting near the jumper wire connection portion of the retention clamp by sliding the movable frame by the sliding drive means toward the jumper wire connection portion of the retention clamp and rotating the sliding rotary cylinder and the cutting cylinder by the rotation drive means. A cutting device for a jumper wire connection of a retaining clamp, which is characterized by being capable of cutting. The jumper wire of the retaining clamp according to claim 1, wherein the sliding drive means is an operation handle whose one end is pivotally supported by an arm-shaped fixed frame and the middle portion is pivotally supported by the movable frame. Connection cutting device. The device for cutting a jumper wire connection portion of a retention clamp according to claim 1 or 2, wherein the rotary drive means is an electric motor. The third aspect of the present invention is characterized in that a first gear is provided on the outer periphery of the rear end portion of the sliding rotary cylinder, and the second gear provided on the rotating shaft of the electric motor is meshed with the first gear. A device for cutting jumper wire connections of the described retention clamps. In the construction method of removing the transmission line between a plurality of tension towers of the transmission line, the retaining clamp supported by each tension tower is connected with a split wire and the transmission line is passed through the gold wheel of each tension tower. ,
The jumper wire of each retention clamp is removed, the cutting device according to any one of claims 1 to 4 is fixed to each retention clamp, and the connection portion of the jumper wire is cut and removed by the cutting device, and then adjacent to each other. A method of re-covering or removing a transmission line, which comprises connecting a retention clamp with a split wire, pulling the transmission line from one end of the transmission line, and removing the transmission line through each of the gold wheels.

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