JP2008109801A - Cutting device for jumper wire joint portion of anchor clamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting tool for the jumper wire joint portion of an anchor clamp capable of changing edges for making vertical and horizontal notches. <P>SOLUTION: The cutting tool 3 for making notches in the anchor clamp C is placed on the jumper wire joint portion through a guide rail 4 which extends in parallel with the anchor clamp C from a fitting. Also the cutting tool 3 movably supports the guide rail 4 by a guide body 11. A fixed edge unit 14 and a movable edge unit 15 are attached on the counter portion of a portable oil hydraulic press 12 fixed to the guide body 11. Respective units 14, 15 are integrally connected by penetrating a rotating shaft 17 into a cross cutting edge 18, a middle piece 19 and a straight cutting edge 20 to be movably supported by a mounting member 16 fixed to a frame 13. Further, fixing either of the straight cutting edge 20 or the cross cutting edge 18 to a predetermined cutting operating position by an engaging pin 21 appearing and retreating from/into the groove 16a of the mounting member 16 causes the other to be turned around not to butt the cutting edges each other in a retracted position, thereby enabling cutting operations. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  When replacing the old and new transmission lines, connect the jumper wires of the retention clamps so that the tension clamps at the front and rear ends of the old lines can pass smoothly through the gold wheel before the towing and extension work of the new lines. The present invention relates to a device for excising a part.

When replacing an old line that spans several diameters with a new line, connect the new line to the end of the old line, connect a pilot wire to the start of the old line, and tow the gold wheel. The retaining clamps at the start and rear ends of the old wire are composed of a steel clamp that is compression-connected to the steel core wire, and an aluminum sleeve that is inserted into the steel strand and the aluminum stranded wire and is compression-connected. On the aluminum sleeve, a jumper plate-like jumper wire connecting portion is formed so as to project laterally in order to connect jumper wires that link electric wires between adjacent systems. This jumper wire connection prevents the gold wheel from passing. For this reason, conventionally, after the jumper wire connecting portion is cut by the cutting tool described in Patent Document 1, the new wire is connected to the end of the old wire. As this cutting tool, a straight blade tool for making a cut in an aluminum sleeve in which a jumper wire connecting portion in a retention clamp is formed and an arc blade tool for making an arc-shaped cut in an aluminum sleeve are prepared. First, the former is attached to the upper and lower dies of the portable hydraulic press to make a straight cut, then the former is removed and the latter is attached to make an annular cut, and the excised part is manually removed.
JP-A-9-135511

In the conventional cutting tool, there is a troublesome replacement work for reattaching the arcuate blade that cuts in the radial direction from the straight blade that cuts in the axial direction of the retaining clamp. In addition, since the incision in the axial direction is extended several times by gradually shifting the tool, it is necessary to mark at least the position where the incision is made at the beginning, and the position of the blade to the mark line There is a problem that alignment is not easy, it takes time to work at a high place, and operability is difficult.
Accordingly, the present invention provides a cutting device for a jumper wire connecting portion of a retaining clamp that can easily replace a blade for making vertical and horizontal incisions, makes cutting work more efficient, and facilitates positioning of the blade to the incision position. It is an issue.

In order to solve the above-mentioned problem, a first invention is a cutting device for cutting and removing a jumper wire connecting portion formed so as to project laterally from an aluminum sleeve C2 of a retaining clamp. With a hydraulic drive, a pair of opposed linear horizontal cutting blades 18 for making axial cuts in the aluminum sleeve C2 and a pair of opposed arcuate vertical cutting blades 20 for making cuts in the orthogonal direction are provided. The horizontal cutting blade 18 is supported so as to be rotatable around the rotation shaft 17 and is displaced from a cutting operation position where the blade edge is abutted to a retracted position where the blade edge does not face, so that either cutting operation is not hindered by the other. Configured to be possible.
In the second invention, the mounting member 16 is provided in the hydraulic press machine 12, and the vertical cutting blade 20 and the horizontal cutting blade 18 are engaged with the mounting member 16 and supported so as to be movable in a direction orthogonal to the compression direction. The blade is fixed at the cutting operation position, and the blade for performing the cutting operation can be selected alternatively.
In the third invention, the intermediate piece 19 is rotatably supported by the rotary shaft 17 between the vertical cutting blade 20 and the horizontal cutting blade 18, and the vertical cutting blade 20, the horizontal cutting blade 18 and the intermediate piece 19 are mounted on the mounting member 16. Is fitted so as to be movable in a direction perpendicular to the notch, and a locking groove 16 d for restricting the movement of the locking projection 19 b protruding from the intermediate piece 19 is provided at a corresponding position of the mounting member 16. The blade 20, the horizontal cutting blade 18 and the intermediate piece 19 are configured to be prevented from falling off.
In the fourth invention, a detachable mounting bracket 2 is provided on the retaining clamp C, the guide rail 4 is supported along the retaining clamp C on the mounting bracket 2, and the cutting tool 3 is retained by the retaining clamp C by the guide rail 4. The cutting device 1 is configured so as to be guided so as to be movable in parallel with each other.
In the fifth invention, the guide rail 4 is provided with the orthogonal rail 5 that extends in the orthogonal direction and guides the mounting bracket 2 so that the mounting bracket 2 is movable, and the vertical cutting blade 20 or the horizontal cutting blade 18 is moved by the compression of the hydraulic press machine 12. Thus, the mounting bracket 2 can be moved relative to the guide rail 4.
In the sixth invention, the mounting member 2 is opposed to receive the tension clamp C, is hinged so that one side can be opened and closed, and has an inner surface corresponding to the cross-sectional shape of the tension clamp C. And a lock handle 8 that holds the closed state by pulling them together, and a bolt 10 that is screwed into the gripping members 7a and 7b so as to be in contact with the outer periphery of the retaining clamp.
In the seventh invention, the hydraulic press machine 12 is pivotally mounted so as to be rotatable in a direction perpendicular to the incision of the transverse cutting blade 18 to the tension clamp C, and has a length for abutting the tip portion on the tension clamp C. An adjustable positioning member 25 is provided, and the horizontal cutting blade 18 can be fixed in the direction perpendicular to the notch by applying it to the tension clamp C in a state where the cutting position of the horizontal cutting blade 18 is aligned with the tension clamp C. The movement of the positioning member 25 in accordance with the movement of the cross-cutting blade 18 along the tension clamp C to be extended is prevented from being hindered by the protrusion on the tension clamp C.

  In the present invention, it is possible to replace the horizontal cutting blade for cutting the length direction in the retaining clamp and the vertical cutting blade for cutting in the radial direction without removing the cutting blade at a high place. The work can be done easily and efficiently by one person. Further, once the position for cutting is determined, even if the blade position is shifted in order to extend the cutting, it is guided to an appropriate cutting position by the guide rail, so that it is possible to eliminate the burden of positioning work for the horizontal cutting blade. Further, when the horizontal cutting blade is adjusted to the position where the cut is made, it can be easily fixed by the positioning member, the cut can be made at an accurate position, and the subsequent movement on the tension clamp is not hindered.

  As shown in FIG. 1 and FIG. 6 (A), the retaining clamp C to which the cutting device 1 is attached inserts and crimps the steel core wire of the steel core aluminum into the center hole of the steel clamp C1, and further attaches the aluminum sleeve C2 to the steel. It is crimped on the clamp C1. The aluminum sleeve C2 is formed with a jumper-plate-like jumper wire connecting portion for connecting a jumper wire so as to project laterally (downward in the figure). The cutting device 1 for incising the tension clamp C includes a mounting bracket 2 on one end for fixing on the tension clamp C, a main body 3 on the other end for incising the tension clamp C, and a guide rail extending between the two. 4 is provided.

  As shown in FIGS. 1 and 2, the guide rail 4 has a long shape with a substantially convex cross section, and a short orthogonal rail 5 with a substantially C-shaped cross section is coupled to one end of the guide rail 4 in the orthogonal direction. The mounting bracket 2 includes a guide member 6 that is fitted to and supported by the orthogonal rail 5 so as to be slidable in the groove direction, and a gripper 7 that can be mounted on the tension clamp C by moving within a predetermined range integrally with the guide member 6. It has. The guide member 6 has a flanged protrusion 6 a that fits into the groove 5 a of the orthogonal rail 5.

  The gripping body 7 is composed of a pair of gripping members 7a and 7b which are fixed to the lower part of the guide member 6 and which can be opened and closed and are hinged on one side. A space for receiving the tension clamp C is provided inside the gripping members 7a and 7b, and dies 9a and 9b are fitted to both ends in the axial direction. Bolts 10 are screwed onto the dies 9a and 9b from above and below, and the tip is brought into contact with the retaining clamp C. The dies 9a and 9b have an inner peripheral surface that forms a hexagonal shape corresponding to the outer shape of the retaining clamp C. The hinge part of the gripping body 7 has a play that can change the distance between the gripping members 7a and 7b so as to correspond to two types of retaining clamps C having different diameters.

  A lock handle 8 is provided at the center of the holding body 7 on the opening and closing side. The lock handle 8 is pivotally supported by one gripping member 7b so as to be reciprocally rotatable up and down by a pivot 8a. A hook portion 8b extends to the upper end portion of the handle 8, and can be hooked on the hook shaft 8c of the gripping member 7a. If the hook 8b is hooked on the hook shaft 8c and the handle 8 is rotated downward, the gripping members 7a and 7b are pulled, so if they are bolted to the stopper piece 8d fixed to the gripping member 7b, they are mounted on the tension clamp C. The metal fitting 2 can be fixed.

  As shown in FIGS. 3 and 4, the main body 3 includes a guide body 11 having a substantially C-shaped cross section that is slidably fitted to and supported by the flange portion 4 a of the guide rail 4, and a portable hydraulic press. 12. A frame 13 of a hydraulic press machine 12 is bolted and fixed to the lower portion of the guide body 11. The frame 13 is substantially C-shaped, and a fixed blade unit 14 is mounted on one side and a movable blade unit 15 is mounted on the other side via an attachment member 16 at the opposing portion.

  As shown in FIGS. 3 and 5, the mounting member 16 has a substantially C-shaped cross section having a lateral fitting groove 16 a having a narrow opening and protrudes into the groove 13 a of the frame 13 at the top. It has a guide protrusion 16b, and has a fixed protrusion 16c inserted into one opposing portion of the frame 13 or a ram 23 described later on the back. An engaging pin 21 is screwed into the mounting member 16 so that the tip portion thereof protrudes and retracts into the groove 16a and selectively fixes the blade to be used. A guide groove 16d extending in the lateral direction is formed in the center of the inner surface of the mounting member 16 in the vertical direction. A through hole 16e is formed at one end of the locking groove 16d.

  The fixed blade unit 14 includes a rotating shaft 17, a horizontal cutting blade 18, an intermediate piece 19, and a vertical cutting blade 20. The horizontal cutting blade 18, the intermediate piece 19, and the vertical cutting blade 20 are integrally connected through the rotating shaft 17, and are slidably fitted into the fitting groove 16 a of the mounting member 16.

  In the horizontal cutting blade 18, a blade head 18 b having a linear cutting edge is continuous with a convex engagement portion 18 a that engages with a groove 16 a of the mounting member 16. A through hole 18c through which the rotary shaft 17 is rotatably passed is provided in the central portion of the convex engagement portion 18a. Further, an engagement recess 18 d for fixing with the engagement pin 21 is provided on the back portion of the horizontal cutting blade 18.

  The intermediate piece 19 has a substantially convex cross section, and a through-hole 19b through which the rotary shaft 17 is rotatably passed is provided at the center of the engaging portion 19a that engages with the groove 16a. The intermediate piece 19 is fitted into the fitting groove 16a of the mounting member 16 at all times. A locking screw 19c, which is a locking protrusion protruding into the locking groove 16d in a state of being fitted to the mounting member 16, is screwed onto the back portion of the intermediate piece 19. The locking screw 19 c is screwed through the through hole 16 e of the mounting member 16 after the intermediate piece 19 is fitted to the mounting member 16, and the tip abuts against the rotating shaft 17 as shown in FIG. 3.

  In the vertical cutting blade 20, a blade head 20b having a semicircular arc cutting edge is continuous from a convex engagement portion 20a engaged with the groove 14c. A through hole 20d through which the rotary shaft 17 is rotatably passed is provided at the center of the convex engagement portion 20a. Further, an engagement recess 20 d is provided on the back of the vertical cutting blade 20 to be fixed by the engagement pin 21 at a predetermined position when the longitudinal cutting blade 20 moves along the fitting groove 16 a of the mounting member 16.

  The movable blade unit 15 includes a rotary shaft 17, a horizontal cutting blade 18, an intermediate piece 19, and a vertical cutting blade 20 in substantially the same manner as the fixed blade unit 14. As shown in FIG. 3, the horizontal cutting blade 18 and the vertical cutting blade 20 in the movable blade unit 15 are provided with engaging recesses 18d and 20d at the bottom, and are engaged with an engaging pin 21 penetrating the attachment member 16 from below. The

  As shown in FIG. 3, in the hydraulic press machine 12, a hydraulic cylinder 22 is formed integrally with a frame 13, and a ram 23 for hydraulically driving the movable blade unit 15 is slidably fitted. An attachment member 16 of the movable blade unit 15 is fixed to one end of the ram 23. A hydraulic pump (not shown) is connected to both ends of the hydraulic cylinder 22, and the ram 23 is moved in the left-right direction in the figure by hydraulic control to move the horizontal / vertical cutting blades 18 and 20 closer to and away from each other.

  In this cutting device for the jumper wire connecting portion of the clamping clamp, the horizontal cutting blade 18 of the cutting tool 3 arranged at the end of the guide rail 4 is aligned with the tip of the clamping clamp C on the jumper wire connecting portion C2 side. 5 is mounted on the tension clamp C. In the mounting bracket 2, first, the gripping body 7 is opened, and the gripping body 7 is covered with the tension clamp C so that the gripping clamp C is sandwiched between the gripping members 7a and 7b, and the hook portion 8b is covered with the gripping member 7a. Then, the handle 8 is rotated downward and is bolted to the stopper 8d. Next, the tension clamp C is securely fixed with the bolt 10 inserted into the gripping members 7a and 7b. At this time, since the tension clamp C is fixed with the bolt 10 and the distance between the gripping members 7a and 7b of the gripping body 7 can be changed, it is possible to cope with two types of tension clamps C having different diameters.

  The main body 3 adjusts the position where the cut is made by sliding the guide body 11 on the guide rail 4. As shown in FIGS. 6A to 6C, the cutting tool 3 hydraulically drives the hydraulic press machine 12 and moves the movable blade unit 15 toward and away from the fixed blade unit 14, thereby cutting the horizontal cutting blade 18. , 18, the tension clamp C is pressed from both sides, and a straight cut is made in the aluminum sleeve C2. At this time, when only one horizontal cutting blade 18 or vertical cutting blade 20 of the fixed blade unit 14 or the movable blade unit 15 contacts the retention clamp C, the guide rail 4 moves relative to the retention clamp C together with the cutting tool 3. Accordingly, since the mounting bracket 2 slides the orthogonal rail 5 in the direction of the groove 5a, the cutting position is not shifted and an excessive bending force is not generated in the retention clamp C. When the horizontal cutting blades 18 and 18 bite into the aluminum sleeve C2 and come into contact with the steel clamp C1, the changeover switch (not shown) is operated due to a rapidly rising hydraulic pressure, and the compression operation of the hydraulic press 12 is reversed to move the movable blade unit 15 backward. . In this way, the aluminum sleeve C2 is cut, the cutting tool 3 is moved to the mounting bracket 2 side on the guide rail 4, the cut is extended in the same manner, and this is repeated as many times as necessary to cut the jumper wire connection portion. Extend to a position that passes.

  After the horizontal cutting by the horizontal cutting blade 18, the vertical cutting of the fixed blade unit 14 and the movable blade unit 15 is performed in order to make the vertical cutting by the vertical cutting blade 20 as shown in FIGS. The blade 20 is set. As indicated by a two-dot chain line in FIG. 4, the vertical cutting blade 20 is inverted by 180 ° around the shaft 18, and the engaging pin 21 locked to the horizontal cutting blade 18 is retracted to be integrated with the rotary shaft 17. The horizontal cutting blade 18, the intermediate piece 19, and the vertical cutting blade 20 are moved in the fitting groove 16a of the mounting member 16, and the vertical cutting blade 20 is locked by the engagement pin 21 to fix the vertical cutting blade 20 at this position. Then, the horizontal cutting blade 18 is inverted by 180 ° around the shaft 18. At this time, the movement of the locking screw 19c of the intermediate piece 19 is restricted at both ends of the locking groove 16d of the mounting member 16, so that the horizontal cutting blade 18, the intermediate piece 19 and the vertical cutting blade 20 integrated by the rotary shaft 17 are provided. Does not fall off the mounting member 16. After the vertical cutting edge 20 is aligned with the front end of the horizontal cut, the vertical cutting edges 20 and 20 press the tension clamp C from above and below by being hydraulically driven by the hydraulic press 12 in the same manner as before. Then, a vertical cut is made in the aluminum sleeve C2. When the vertical cutting edge 20 abuts, a substantially ring-shaped cut is made in the aluminum layer along the substantially outer peripheral surface of the steel clamp S. When the vertical cutting blade 20 hits the aluminum sleeve C2, the changeover switch is operated due to a rapidly changing hydraulic pressure, and the compression operation of the hydraulic press 12 is reversed to move the movable blade unit 15 backward. The jumper wire connection portion of the aluminum sleeve C2 can be easily peeled off from the tension clamp C by manual cutting by vertical and horizontal cuts.

  Another embodiment is shown in FIGS. In these drawings, the same components as those of the previous embodiment are denoted by the same reference numerals and description thereof is omitted. A handle 24 is provided on the frame 13 of the main body 3. The handles 24 are bent and formed into a substantially parallel rectangular shape along the frame 13 by a rod-like material, and a pair of handles 24 are provided so as to extend forward and backward, and are bolted at an intermediate portion of the frame 13. The frame 13 is provided with a positioning member 25 for holding the cutting position of the horizontal cutting blade by bringing it into contact with the retention clamp C during use. The positioning member 25 includes a mounting piece 26 screwed onto the frame 13 and a telescopic piece 27 connected to the mounting piece 26 via a hinge 28 so as to be rotatable in the vertical direction. The telescopic piece 27 includes a lower piece 27b that is coupled to an upper piece 27a fixed to the hinge 28 by an adjusting screw 27d that passes through the long piece 27c in the longitudinal direction. The length of the expansion / contraction piece 27 can be adjusted by changing the coupling position of the lower piece 27b with respect to the upper piece 27a with the adjusting screw 27d so as to contact the retaining clamp C in the orthogonal direction.

  The positioning member 25 determines the cutting position of the horizontal cutting blade 18 to the tension clamp C, and then makes the expansion and contraction piece 27 abut on the tension clamp C to fasten and fix the adjustment screw 27d. If the lower piece 27 b is pressed against the tension clamp C in this state, the horizontal cutting blade 18 can be held at a predetermined position of the tension clamp C, and the horizontal cutting blades 18, 18 can be cut by driving the hydraulic press machine 12. Thereafter, even if the horizontal cutting blades 18 and 18 are shifted in the extending direction along the aluminum sleeve C2 in order to extend the cut, the expansion / contraction piece 27 of the positioning member 25 is freely rotated by the hinge 28 with respect to the mounting piece 26. Even if the large diameter portion of the aluminum sleeve C2 comes into contact with the expansion / contraction piece 27, the relative displacement is allowed without difficulty.

It is a front view of the cutting device concerning the present invention. It is a side view of a cutting device. It is the front view which notched a part of main body. It is a bottom view of a main body. It is a disassembled perspective view of a fixed blade unit. It is explanatory drawing which shows the process of the excision work of a jumper wire connection part. It is a front view of the main body of other embodiment. It is a side view of the main body of other embodiment. It is a perspective view of a positioning member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cutting device 2 Mounting bracket 3 Main body 4 Guide rail 5 Orthogonal rail 6 Guide member 7 Holding body 7a Holding member 7b Holding member 8 Handle 10 Bolt 11 Guide body 12 Hydraulic press machine 14 Fixed blade unit 15 Movable blade unit 16 Mounting member 16d Engagement Stop groove 17 Rotating shaft 18 Horizontal cutting blade 19 Intermediate piece 19c Locking screw 20 Vertical cutting blade 21 Engaging pin 22 Hydraulic cylinder 23 Ram 25 Positioning member C Tension clamp C1 Steel clamp C2 Aluminum sleeve

Claims (7)

A jumper wire connection part of a tension clamp having a jumper wire connection part formed on an aluminum sleeve so as to connect a jumper wire that keeps the strands of steel core aluminum and links the adjacent diameters to each other. A cutting tool for cutting and removing
In what is equipped with a portable hydraulic press machine and is equipped with a pair of opposed linear horizontal cutting blades that cut axially into an aluminum sleeve by hydraulic drive and a pair of opposed arcuate vertical cutting blades that cut perpendicularly,
The vertical cutting blade and the horizontal cutting blade are supported so as to be rotatable around the rotation axis from the cutting operation position where the blade edge is abutted to the retreat position where the blade edge does not face, both of which do not interfere with the cutting operation of one blade. A device for cutting a jumper wire connecting portion of a retaining clamp, characterized in that it can be arranged.   A blade for performing a cutting operation, including an attachment member that supports the vertical cutting blade and the horizontal cutting blade so as to be movable in a direction orthogonal to the cutting and is selectively engaged at a predetermined cutting position; The apparatus for cutting a jumper wire connection portion of a retention clamp according to claim 1, wherein the device can be selected. An intermediate piece is supported between the vertical cutting blade and the horizontal cutting blade so as to be rotatable around the rotation axis,
The mounting member has a locking groove for fitting the vertical cutting blade, the horizontal cutting blade and the intermediate piece so as to be movable in a direction perpendicular to the notch, and restricting the movement of the locking projection protruding from the intermediate piece, The apparatus for cutting a jumper wire connecting portion of a tension clamp according to claim 2, wherein the vertical cutting blade, the horizontal cutting blade and the intermediate piece are prevented from falling off from the mounting member. A mounting bracket detachably attached to the tension clamp;
The jumper of the tension clamp according to any one of claims 1 to 3, further comprising a guide rail that is supported by the mounting bracket along the tension clamp and guides the hydraulic press so as to be movable in parallel with the tension clamp. Wire connection cutting device.   The guide rail is provided with an orthogonal rail that extends in an orthogonal direction and guides the mounting bracket in a movable manner, and the mounting bracket is moved along with the cutting operation of the vertical cutting blade or the horizontal cutting blade by the compression drive of the hydraulic press. The apparatus for cutting a jumper wire connecting portion of a retention clamp according to claim 4, characterized in that can move relative to the guide rail. The mounting bracket is opposed to receive the retention clamp, is hinged so that one side can be opened and closed, and has a pair of gripping members having an inner surface corresponding to the cross-sectional shape of the retention clamp;
A lock handle that holds the closed state by pulling between the gripping members;
6. The apparatus for cutting a jumper wire connecting portion of a tension clamp according to claim 5, further comprising: a bolt that is screwed into the gripping member so that a tip thereof is in contact with an outer periphery of the tension clamp.   The hydraulic pressing machine is provided with a positioning member that is pivotally mounted in a direction orthogonal to the incision of the horizontal cutting blade to the retention clamp and is adjustable in length so that the tip end abuts on the retention clamp. Position the horizontal cutting blade in the direction perpendicular to the cutting by applying it to the retention clamp with the cutting position of the horizontal cutting blade aligned with the movement of the horizontal cutting blade, while moving the horizontal cutting blade along the retention clamp to extend the cutting. 4. The apparatus for cutting a jumper wire connecting portion of a tension clamp according to claim 1, wherein the movement of the positioning member is not hindered by the protruding portion on the tension clamp.

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