JP5886345B2 - Hydraulic cutter - Google Patents

Description

  The present invention relates to a hydraulic cutter used for cutting an overhead wire, and more particularly, to a hydraulic cutter capable of preventing positional displacement at the time of cutting with respect to an overhead wire.

When cutting an overhead electric wire in indirect hot wire work, a hydraulic cutter for the indirect hot wire method is used.
As such a hydraulic cutter, for example, as shown in Patent Document 1 described below, a cutter body (hydraulic cutter) having a pair of blades and an operation switch portion together with a hydraulic hose connection portion and an insulating grip It is constructed so that it can be covered and gripped with a holder body with a part, and a coupler is attached to the end of the hydraulic hose, and along this hydraulic hose, an operation switch is connected to one end and an outlet is connected to the other end. Attach the operating cord provided, connect the coupler and outlet to the hydraulic pump device, grasp the grip part of the holder body and press the operation switch of that part to operate the hydraulic pump device remotely, The thing which made it possible to cut | disconnect the electric wire with a hydraulic cutter is known.

  Moreover, the hydraulic cutter 1 as shown in FIG. 6 is also used in indirect hot-line work. This hydraulic cutter 1 is configured such that a cutter body 3 having a pair of blade bodies (first blade body 31 and second blade body 32) is attached to the tip of an insulating operation rod 4 via an adapter 41. Thus, the cutter body 3 has a pair of blade bodies 31 and 32 attached to the support shaft 34 at their respective base ends so as to be relatively rotatable. A hydraulic hose 33 is connected to the base end of the cutter body 3 via the adapter 41, and the base end of the hydraulic hose 33 is connected to a hydraulic pump (not shown) via a coupler 38. The cutter body 3 is configured to open and close the pair of blade bodies 31 and 32 by a compression mechanism (not shown) by supplying and releasing the pressure oil supplied from the hydraulic pump via the hydraulic hose 33.

  An operation switch 8 is attached to the grip portion 4a located at the lower part of the insulating operation rod 4. A remote control cord 9 is connected to the operation switch 8, and the base end of the cord 9 is connected to a metal outlet 10. The hydraulic pump is operated and stopped by operating the operation switch 8 to supply and release the pressure oil.

Japanese Utility Model Publication No. 6-71079

  By the way, in the former indirect hot wire hydraulic cutter, since the grip portion is provided in the connecting portion of the hydraulic hose, the distance between the blade body and the grip portion is short, and the hydraulic cutter is intended when cutting the electric wire. There is almost no risk of deviation from the location.

On the other hand, in the latter hydraulic cutter shown in FIG. 5, the operation switch portion to be remotely operated is located below the insulating operation rod, and the operation switch and the blade body are separated from each other. Even when the electric wire is cut, there is a disadvantage that the blade body of the cutter body is displaced from the intended location, and a location different from the intended location is cut.
For this reason, an unexpected impact is applied to the indirect hot wire tool holding the electric wire in the vicinity of the cut portion due to the shift of the cut portion, and the electric wire comes off from the indirect hot wire tool holding and contacts the charging unit. However, there are concerns about inconveniences such as inducing a ground fault.

  In addition, before attaching the hydraulic cutter to the electric wire, it is necessary to grasp the vicinity of the cutting portion with an indirect hot wire holding tool, and the work of attaching the indirect hot wire holding tool to the electric wire and the operation of attaching the hydraulic cutter to the electric wire are performed. Since it has to be performed separately, the number of work steps is increased, and the work effort is increased.

  This invention is made | formed in view of the situation which concerns, can reduce the work man-hour and work labor until it cuts an electric wire, and is going to cut | disconnect the cutter main body used with an indirect hot wire. The main object is to provide a hydraulic cutter that can be securely fixed at an intended position of the overhead wire.

  In order to achieve the above object, a hydraulic cutter according to the present invention supports a pair of blade bodies so as to be relatively rotatable around a common support shaft at each base end portion, and the pair of blade bodies are hydraulically supported. A head having a movable body having a movable body having a movable body opposite to the hook portion is provided as an insulating operation rod. An indirect live-line gripping tool provided with an adjustment mechanism that is attached to the tip of the head and has an adjustment mechanism that adjusts the distance between the hook and the movable body by moving the movable body by the rotation of the insulating operation rod. Bolts projecting from the cutter body in parallel with the support shaft can be inserted into the main body, and the gap between the pair of blade bodies of the cutter body is adjacent to the space between the hook portion and the movable body. (Hook part A plurality of through-holes in which the cutter body can be arranged (so as to be juxtaposed in the extending direction of the electric wires arranged in the space between the movable body) and the cutter body, the bolt is attached to the head The head body is held by selecting and inserting and fixing the through hole formed in the main body.

  Therefore, by selecting and inserting and fixing the bolts provided in the cutter body through the through holes formed in the head body, the space between the pair of blade bodies of the cutter body and the space between the hook portion and the movable body can be reduced. Because it can be adjacent, if the hook part of the indirect live wire gripping tool is hooked on the electric wire, the electric wire will be placed between the pair of blades, and there is no need to attach the cutter body separately to the electric wire In addition, since the cutter body is fixed in a state where it is juxtaposed with the indirect live wire gripping tool, the attachment position of the cutter body may be shifted when the indirect live wire gripping tool is fixed to the electric wire. Disappear.

  Here, the bolt may be formed integrally with the support shaft. With such a configuration, it is possible to cope without increasing the number of parts.

  Further, in order to fix the cutter body to the indirect live wire gripping tool, only one bolt is required. However, two bolts are provided, and the cutter body is attached to any of the plurality of through holes. You may make it hold | maintain in the said head main body by selecting these and inserting and fixing.

  According to such a configuration, the attachment state of the cutter body to the indirectly active work tool is strengthened, and there is no inconvenience that the attachment angle of the cutter body to the indirectly active work tool is changed during the work.

  Further, the bolt is protruded from the cutter body on both sides, the indirect live wire gripping tool is provided on both sides of the cutter body, and the cutter body is connected to each bolt with an indirect live wire gripping tool. Alternatively, the through holes of the head main body may be selected and inserted and fixed to fix the head main bodies of the indirect live wire holding tools on both sides.

  According to such a configuration, since the electric wire is grasped by the indirect live wire gripping tool on both sides of the cutter body, there is no more possibility of jumping even if the electric wire is cut by the cutter body, and the cutter body to the electric wire is eliminated. Further, it is possible to carry out the work from the attachment of the indirect live wire gripping tool to the operation of the cutter body while cutting these wires while supporting these tools.

  As described above, according to the hydraulic cutter according to the present invention, a bolt projects from the cutter body in parallel with the support shaft that supports the pair of blades, and the bolt is attached to the head body of the indirect hot wire gripping tool. Since the provided through hole is selected and inserted and fixed, the gap between the pair of blade bodies of the cutter body and the space between the hook portion and the movable body are adjacent to each other (between the hook portion and the movable body). Since the indirect hot wire gripping tool is attached to the electric wire, it is possible to place the electric wire between the pair of blades of the cutter body at the same time. Further, it is not necessary to separately perform the work of attaching the hydraulic cutter to the electric wire, and it is possible to securely fix the cutter body used in the indirect hot wire at the intended position of the overhead wire to be cut.

  Here, by forming the bolt integrally with the support shaft, it is possible to avoid an increase in the number of parts, and it is not necessary to change the shape of the existing cutter body.

  Moreover, by providing two bolts and selecting and inserting and fixing these two bolts from a plurality of through holes formed in the head body, a strong fixed state can be formed. There is no inconvenience that the attachment state of the cutter body to the indirect hot wire holding tool is shifted during the operation.

  Furthermore, by projecting bolts on both sides from the cutter body, each bolt is inserted and fixed by selecting the through hole of the head body on the corresponding side of the indirect live wire gripping tool provided on both sides. Is held by the head body of the indirect live wire gripping tool on both sides, it is possible to more reliably suppress the jumping of the wire when the wire is cut, and the wire of the cutter body or the indirect live wire gripping tool From the attachment to the wire to the cutting of the electric wire can be performed by one operator.

FIG. 1 is an overall configuration diagram showing a hydraulic cutter according to the present invention. FIG. 2 is a diagram showing an indirect live wire gripping tool and a cutter body constituting the hydraulic cutter according to the present invention, (a) is a diagram showing an indirect live wire gripping tool, and (b) is a cutter body. FIG. FIG. 3A is a perspective view showing the vicinity of the pair of blades of the cutter body, and FIG. 3B is an exploded perspective view showing the vicinity of the pair of blades of the gripping tool for the indirect live wire and the cutter body. FIG. FIG. 4 is a diagram showing a state in which the cutter body is attached to the head part of the indirect live wire gripping tool. FIG. 4A is a view in which the axial center of the indirect live wire work tool and the axial center of the cutter body substantially coincide. The figure which shows the state attached, and (b) is the figure which shows the state which attached the axial center of the working tool for indirect hot wire, and the axial center of a cutter main body about 45 degree | times, (c) is an indirect active line. It is a figure which shows the state which inclined about 90 degree | times and attached the axial center of the working tool for lines, and the axial center of the cutter main body. FIG. 5 is a diagram showing an operation procedure for cutting an electric wire using the hydraulic cutter according to the present invention, and FIG. 5 (a) shows a state before the electric wire is inserted between a pair of blade bodies of the cutter body. FIG. 5 (b) is a diagram showing a state where an electric wire is inserted between a pair of blades of the cutter body, and FIG. 5 (c) shows an indirect hot wire gripping tool on both sides of the cutter body. It is a front view which shows the state just before attaching and cutting an electric wire with a cutter main body. FIG. 6 is an external view showing a conventional hydraulic cutter.

  Hereinafter, embodiments of a hydraulic cutter according to the present invention will be described with reference to the drawings.

  In FIG. 1, a hydraulic cutter 1 according to the present invention is shown. The hydraulic cutter 1 includes an indirect live wire gripping tool (stray link tongue) 2 capable of gripping an electric wire, and a pair of blade bodies (first blade body). 31 and a cutter body 3 having a second blade body 32).

As shown in FIG. 2A, the indirect live-line gripping tool (stray link tong) 2 is configured by providing a head 5 as a gripping bracket at the tip of the insulating operation rod 4.
The head 5 is made of a hard metal such as an aluminum alloy, and includes a head body 6 having a U-shape and a movable portion 7 that can move forward and backward in the axial direction of the insulating operation rod 4.

  The head body 6 is located at the upper part of the U-shape, and has a claw-shaped hook part 61 that is hooked on an electric wire or the like, and a base end that is disposed below the hook part 61 and is located at the lower part of the U-shape. Part 62 and a side wall part 63 provided so as to connect one side end of each of the hook part 61 and the base end part 62. In this example, the hook part 61 and the side wall part 63 are configured. It is formed continuously so as to draw a gentle curve.

  In addition, a rotating cylindrical body (not shown) having a through hole with an internal thread formed on the inner peripheral surface is rotatably mounted on the base end portion 62 while being restricted from moving in the axial direction.

  The movable portion 7 holds the electric wire in cooperation with the head body 6 and a rod-shaped screw shaft body 71 having a male screw meshing with the female screw on the inner peripheral surface of the through hole of the rotating cylindrical body. And a movable body 72 that can be gripped). The movable body 72 has a recess on the surface facing the side wall 63 of the head body 6, and is attached to the tip of the screw shaft body 71 in a non-rotatable manner with the side wall 63 fitted in the recess. . The insulating operation rod 4 has its tip fixed to the rotating cylindrical body and rotates integrally therewith.

  Accordingly, when the insulating operation rod 4 is rotated, a rotating cylindrical body (not shown) is rotated accordingly, and the movable body 72 is fitted with the side wall 63 in the recess, so that the screw shaft screwed with the rotating cylindrical body is inserted. The body 71 does not rotate together, and is screwed back and forth in the axial direction with respect to the base end portion 62.

  When attaching such an indirect live wire gripping tool (stray link tong) 2 to an overhead electric wire, first, the electric wire can be inserted between the hook portion 61 of the head body 6 and the movable body 72 of the movable portion 7. The insulation operation rod 4 is rotated until it is loosened. Then, the head 5 is brought close to the electric wire with the insulating operation rod 4, the electric wire is inserted between the hook portion 61 and the movable body 72 of the head 5, and the hook portion 61 is hooked on the electric wire. When the insulating operation rod 4 is rotated in the electric wire tightening direction in this state, the rotating cylindrical body rotates with the rotation of the insulating operation rod 4.

  At this time, the head 5 tries to co-rotate in the rotation direction of the insulating operation rod 4, but the hook portion 61 of the head main body 6 is locked to twist the electric wire, and the movable body 72 is a side wall portion of the head main body 6. Therefore, the screw shaft body 71 moves forward (the movable body 72 moves forward toward the hook portion 61), and the electric wire can be tightened between the hook portion 61 and the movable body 72. .

  When the insulating operation rod 4 is rotated in the reverse direction, the rotating cylinder rotates in the same direction as the insulating operation rod 4 rotates, the head 5 is prevented from rotating by the electric wire, and the movable body 72 is the head main body. 6, the screw shaft body 71 screwed into the rotating cylindrical body is retracted (the movable body 72 is retracted toward the base end portion 62), and the hook portion 61 and the movable body 72 are rotated. The interval between and is widened.

  As shown in FIG. 2B, the cutter body 3 has a pair of blade bodies (first blade body 31 and second blade body 32) rotatably attached to the distal end portion thereof, and the proximal end side thereof. In addition, a compression mechanism (not shown) that operates the pair of blade bodies in the closing direction by operating the pair of blade bodies in the closing direction by the pressure oil supplied via the hydraulic hose 33 and releases the hydraulic pressure of the pressure oil. Is provided.

  As shown in FIG. 3, the pair of blade bodies (first blade body 31 and second blade body 32) provided at the tip of the cutter body 2 are relatively centered on a common support shaft 34. In this example, the first blade body 31 is rotated integrally with the reinforcing body 35, and the second blade body 32 is rotated with the first blade body 31 and the reinforcing body 35. It is comprised so that it may rotate between.

  A pair of support plates 36 are disposed outside the first blade body 31 and the reinforcing body 35 so as to sandwich them, and the first blade body 31 and the second blade body are disposed on the pair of support plates 36. The vicinity of both ends of a support shaft 34 that supports 32 is supported.

  Each of the blades 31.32 is formed in a curved curve so that the inner sides facing each other are recessed most in the middle portion, and provided adjacent to each other on the support shaft 34, and the inner sides facing each other are sharp. The blade edges 31a and 32a are formed at the portions so as to be slidable with each other.

  A joint 37 that connects the hydraulic hose 33 is provided at the base end of the cutter body 3, and the hydraulic hose 33 is connected to the joint 44. The base end of the hydraulic hose 33 can be connected to a hydraulic pump (not shown) via a coupler 38.

  In addition to the cutter body 3, the operator carries an operation switch 8. A remote control cord 9 is connected to the operation switch 8, and the base end of the cord 9 is connected to a hydraulic pump (not shown) via a metal outlet 10. By operating this operation switch 8, the hydraulic pump is operated, and the compression mechanism in the cutter body is operated by the pressure oil supplied through the hydraulic hose 33, and a pair of blade bodies (first blade body 31, first blade body 31, 2 blade bodies 32) can be closed, the hydraulic pump can be stopped to release the hydraulic pressure, and the pair of blade bodies can be opened.

  Incidentally, the cutter body 3 is provided with a bolt 11 projecting substantially perpendicular to the support plate 36 in parallel with the support shaft 34. In this example, the bolt 11 is formed integrally with the support shaft 34 by extending one end of the support shaft 34.

  The head body 6 of the indirect hot wire gripping tool 2 is formed with a plurality of through holes 51, 52, 53 from the hook part 61 to the side wall part 63 so that the bolt 11 protruding from the cutter body 3 can be inserted. ing. Each of the through holes 51, 52, 53 is formed perpendicular to a plane including the hook portion 61 and the side wall portion 63 (a plane including the head main body 6 passing through the axis of the insulating operation rod 4). The gap between the pair of blade bodies 31 and 32 of the cutter body 3 and the space between the hook portion 61 and the movable body 72 are arranged adjacent to each other (the space between the hook portion 61 and the movable body 72 is arranged). It is formed so that the cutter body 3 can be arranged (to be arranged side by side in the extension direction of the electric wires).

  In this example, on the axis of the insulating operation rod 4 around the electric wire clamped between the hook portion 61 and the movable body 72 so that the attachment angle of the cutter body 3 with respect to the indirect live wire gripping tool 2 can be adjusted. A first through hole 51 is provided in the position of the hook portion 61 positioned, and second and third through holes 52 and 53 are provided in a portion of the head main body 6 that is approximately 45 degrees apart from the electric wire as a center. ing.

  In addition, after inserting the bolt 11 of the cutter body 3 into the through hole of the head body 6, the nut 12 is screwed into the tip of the bolt 11 protruding from the through hole in order to fix the state. Yes.

  Therefore, when the cutter body 3 is attached using the first through-hole 51, as shown in FIG. 4A, the axis of the cutter body 3 matches the axis of the insulating operation rod 4, The cutter body 3 is attached so as to extend directly above the head body 6 so that the gap between the pair of blade bodies of the cutter body 3 is adjacent to the space between the hook portion 61 and the movable body 72 (hook portion). In this state, the nut 12 is fastened to the bolt 11 and is fixed so as to hold this state.

  Further, when the cutter body 3 is attached using the second through hole 52, the axis of the cutter body 3 is about 45 degrees with respect to the axis of the insulating operation rod 4 as shown in FIG. In an inclined state, the gap between the pair of blade bodies of the cutter body 3 is made adjacent to the space between the hook portion 61 and the movable body 72 (the space between the hook portion 61 and the movable body 72 is arranged). In this state, the nut 12 is fastened to the bolt 11 and fixed so as to hold this state.

  Further, when the cutter main body 3 is attached using the third through-hole 53, the axis of the cutter main body 3 is about 90 degrees with respect to the axis of the insulating operation rod 4 as shown in FIG. In an inclined state, the gap between the pair of blade bodies of the cutter body 3 is made adjacent to the space between the hook portion 61 and the movable body 72 (the space between the hook portion 61 and the movable body 72 is arranged). In this state, the nut 12 is fastened to the bolt 11 and fixed so as to hold this state.

  And the operation | work which cut | disconnects the overhead electric wire 100 using the hydraulic cutter 1 which formed the state which attached the cutter main body 3 to the indirect hot wire holding tool 2 as mentioned above is demonstrated like FIG.4 (c). The state in which the cutter body 3 is attached to the insulating operation rod 4 at an angle of about 90 degrees will be described. First, the operation switch 8 is turned OFF and the pair of blade bodies (first blade body 31, second blade) of the cutter body 3 is firstly turned off. The blade 32) is opened, and the insulating operation rod 4 is rotated and spread between the hook portion 61 of the head body 6 and the movable body 72 of the movable portion 7 until the electric wire 50 can be inserted. Then, the head 5 is approached to the electric wire 100 with the insulating operation rod 4 (FIG. 4A),

  Thereafter, the electric wire is inserted between the hook portion 61 of the head main body 6 and the movable body 72, and the hook portion 61 is hooked on the electric wire 100 so that the cutter main body 3 comes to the position of the intended electric wire to be cut. At this time, the gap between the pair of blade bodies 31 and 32 of the cutter body 3 is adjacent to the space between the hook portion 61 and the movable body 72 (in the space between the hook portion 61 and the movable body 72). Since the electric wires 100 are arranged side by side in the extending direction), the electric wires are arranged between the pair of blade bodies of the cutter body 3 by inserting the electric wires between the hook portion 61 and the movable body 72 of the head 5. Can be installed.

  Then, while maintaining this state, the insulating operation rod 4 is rotated in the tightening direction of the electric wire 100. By this operation, the head 5 tries to rotate together in the rotation direction of the insulating operation rod 4, but the hook portion 61 of the head body 6 is locked so as to twist the electric wire 100. Therefore, since the head 5 is prevented from rotating by the electric wire 100 and the movable body 72 is prevented from rotating by the side wall portion 63 of the head body 6, the screw shaft body 71 moves forward (the movable body 72 faces the hook portion 61). The electric wire 100 is tightened between the hook portion 61 and the movable body 72.

  Therefore, if the indirect live wire gripping tool 2 is fixed to the electric wire 100, the electric wire 100 is disposed between the pair of blades 31 and 32 at the same time, so that as shown in FIG. The other indirect live wire gripping tool 2 'is fixed to the side of the main body 3 opposite to the side on which the indirect live wire gripping tool 2 is attached. If operated, the intended position to be cut can be cut reliably.

In the above configuration, an example in which only one bolt 11 protruding from the cutter body 3 in parallel with the support shaft 34 is provided, but two bolts protruding in parallel with the support shaft 34 are provided, and the cutter body is provided. 3 may be held by the head body 6 by selecting and inserting two bolts out of a plurality of through holes.
By adopting such a configuration, the angle of the cutter body 3 with respect to the insulating operation rod 4 does not shift during the operation, and a firm fixed state can be formed.

  Further, in the above-described configuration, the example in which the bolt 11 is protruded only on one side of the cutter body 3 is shown. However, the bolt 11 is protruded from the cutter body 3 to both sides in the axial direction of the support shaft 34 (for example, support Both ends of the shaft 34 extend in opposite directions), the indirect live wire gripping tool 2 is arranged on both sides of the cutter body 3, and the head body of the indirect live wire gripping tool 2 on the corresponding side of each bolt. The cutter main body 3 may be held by the head main body 6 of the indirect hot wire gripping tool 2 on both sides by selecting and fixing the through-hole 6.

  By adopting such a configuration, the electric wire can be firmly held by the indirect hot wire holding tool 2 on both sides of the cutter main body 3, so that the electric wire may jump up even if the electric wire is cut by the cutter main body 3. It is possible to carry out the work from the attachment of the cutter body 3 and the indirect live wire gripping tool 2 to the electric wire, the support of these tools, and the cutting of the electric wire by the cutter body 3 by one operator. It becomes.

  In the above example, the example in which the three through holes (the first through hole 51, the second through hole 52, and the third through hole 53) of the head main body 6 are formed is shown. However, the bolt 11 is inserted. After that, the gap between the pair of blade bodies of the cutter body 3 can be adjacent to the space between the hook portion 61 and the movable body 72 (in the extending direction of the electric wires arranged in this space). For example, four or more may be formed.

DESCRIPTION OF SYMBOLS 1 Hydraulic cutter 2 Indirect hot wire holding tool 3 Cutter body 4 Insulation operation rod 6 Head body 7 Movable part 11 Bolt 31 1st blade body 32 2nd blade body 34 Support shaft 51-53 Through-hole 61 Hook part 72 Movable body

Claims (4)

A cutter body that supports a pair of blade bodies so as to be relatively rotatable around a common support shaft at each base end, and opens and closes the pair of blade bodies using hydraulic pressure, and
A head body having a head body having a hook portion at a tip portion and a movable portion having a movable body facing the hook portion at a tip portion is attached to a tip portion of an insulation operation rod, and the insulation operation rod An indirect live-line gripping tool provided with an adjustment mechanism that moves the movable body by rotation of the hook portion and adjusts the distance between the hook portion and the movable body,
Bolts projecting from the cutter body in parallel to the support shaft can be inserted into the head body, and a gap between a pair of blade bodies of the cutter body is adjacent to a space between the hook portion and the movable body. A plurality of through-holes capable of arranging the cutter body to be formed are formed,
The hydraulic cutter is characterized in that the cutter body is held by the head body by selecting and inserting the bolts through the through holes formed in the head body.   The hydraulic cutter according to claim 1, wherein the bolt is formed integrally with the support shaft.   Two bolts are provided, and the cutter main body is held by the head main body by selecting and fixing any two of the plurality of through holes to the two bolts. The hydraulic cutter according to claim 1.   The bolt protrudes from the cutter body on both sides, the indirect live wire gripping tool is provided on both sides of the cutter body, and the cutter body has a corresponding indirect live wire gripping tool on the corresponding side. The hydraulic cutter according to any one of claims 1 to 3, wherein the through hole of the head main body is selected and inserted and fixed to be held by the head main body of the indirect live wire holding tool on both sides.

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