JP2018126033A - Wire cutting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire cutting tool capable of reducing a burden of a worker when cutting a wire.SOLUTION: A wire cutting tool comprises: a rotational member; a movable member; a supporting member; and a first link to a fourth link. The rotational member is rotated in accordance with an operation of an indirect live wire operation lob, including a screw part and a smooth part arranged in an end prat of the screw part. The movable member is engaged with the screw part. The support member is rotatably attached to the smooth part relatively. The first link is connected to the movable member through a first joint. The second link is connected to the first link through a second joint, is connected to the support member through the fourth member, and includes a first blade. The third link is connected to the movable member through the first joint, and is extended to a side opposite to the first link. The fourth link is connected to the third link through a third joint, connected to the support member through the fourth joint, and includes a second blade facing to the first blade.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wire cutting tool.

  A tool for cutting an electric wire laid over a power pole is known. For example, Patent Document 1 describes an example of a wire cutting tool. The wire cutting tool is used by being attached to the tip of an indirect hot wire operation rod. By operating the indirect hot wire operation rod, the blade provided in the wire cutting tool moves, and the wire is cut.

JP 2004-121585 A

  By the way, in the conventional wire cutting tool as shown by patent document 1, a pair of blade was arrange | positioned sideways. However, since the working space is limited, it may be difficult to perform the cutting work when the pair of blades are in the horizontal direction.

  This invention is made | formed in view of the above, Comprising: It aims at providing the wire cutting tool which can reduce the burden of the operator when cutting an electric wire.

  In order to achieve the above object, an electric wire cutting tool according to an aspect of the present invention includes a threaded portion having a thread and a cylindrical smooth portion disposed at an end of the threaded portion, and an indirect hot wire. A rotating member that rotates in response to an operation of the operating rod, a movable member that meshes with the screw portion, a support member that is attached so as to be able to rotate relative to the smooth portion, and a first joint that is connected to the movable member. A second link connected to the first link via a second joint, connected to the support member via a fourth joint, and having a first blade at the tip, A third link coupled to the movable member via the first joint and extending to the opposite side of the first link across the movable member; and a third link coupled to the third link via a third joint; Said support member It is connected via a joint, and and a fourth link having a second blade facing the first blade.

  Thereby, the clearance gap between a 1st blade and a 2nd blade opens in the direction in alignment with the longitudinal direction of an indirect hot wire operation stick | rod. That is, the first blade and the second blade are disposed upward. For this reason, the operator can put the electric wire between the first blade and the second blade by moving the electric wire cutting tool straight from the hand toward the electric wire. Compared with the prior art, it is easier to put an electric wire between a pair of blades. Therefore, the wire cutting tool can reduce the burden on the operator when cutting the wire.

  As a desirable mode of the wire cutting tool, it is provided with a cap attached to the rotating member at a position opposite to the movable member with respect to the support member, and the outer diameter of the cap is larger than the inner diameter of the support member. preferable. Thereby, the cap prevents the support member from coming off. The supporting member is prevented from falling off the rotating member.

  As a desirable mode of the wire cutting tool, the rotating member includes a cap fixing portion that is a male screw protruding from the smooth portion, and an outer diameter of the cap fixing portion is smaller than an outer diameter of the smooth portion. It is preferable to be fixed to the cap fixing part. Thereby, the support member can be fitted into the smooth portion from the cap fixing portion side, and the cap can be easily fixed.

  As a desirable mode of the wire cutting tool, it is preferable that a cap fixing portion which is a female screw provided on an end surface of the smooth portion is provided, and the cap is fixed to the cap fixing portion. Thereby, the support member can be fitted into the smooth portion from the cap fixing portion side, and the cap can be easily fixed.

  ADVANTAGE OF THE INVENTION According to this invention, the wire cutting tool which can reduce the burden of the operator at the time of cutting an electric wire can be provided.

FIG. 1 is a front view of the wire cutting tool according to the present embodiment. FIG. 2 is a right side view of the wire cutting tool according to the present embodiment. 3 is a cross-sectional view taken along line AA in FIG. 4 is a cross-sectional view taken along the line BB in FIG. FIG. 5 is a front view of an indirect hot wire operation rod to which the wire cutting tool according to the present embodiment is attached. FIG. 6 is a front view of the wire cutting tool in a state where the movable member has moved to the connector side. FIG. 7 is a cross-sectional view corresponding to the BB cross-sectional view of FIG. 2 in the wire cutting tool according to the first modification. FIG. 8 is a front view of the wire cutting tool according to the second modification. FIG. 9 is a front view of an indirect hot wire operation rod to which the wire cutting tool according to the second modification is attached.

  Hereinafter, the present invention will be described in detail with reference to the drawings. The present invention is not limited by the following modes for carrying out the invention (hereinafter referred to as embodiments). In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range. Furthermore, the constituent elements disclosed in the following embodiments can be appropriately combined.

(Embodiment)
FIG. 1 is a front view of the wire cutting tool according to the present embodiment. FIG. 2 is a right side view of the wire cutting tool according to the present embodiment. 3 is a cross-sectional view taken along line AA in FIG. 4 is a cross-sectional view taken along the line BB in FIG. FIG. 5 is a front view of an indirect hot wire operation rod to which the wire cutting tool according to the present embodiment is attached. FIG. 6 is a front view of the wire cutting tool in a state where the movable member has moved to the connector side.

  As shown in FIG. 1, the wire cutting tool 1 according to this embodiment is a tool for cutting the wire 100. The electric wire 100 is, for example, an aerial distribution line spanned between utility poles. The wire cutting tool 1 is attached to the indirect hot wire operation rod 9 shown in FIG. An operator cuts the electric wire 100 using, for example, an indirect hot wire operation rod 9 to which the electric wire cutting tool 1 is attached, from a cage mounted on an aerial work vehicle.

  As shown in FIG. 5, the indirect hot-wire operation rod 9 includes a rod portion 90, a first connecting portion 91, and a second connecting portion 94. The rod part 90 is a cylindrical long member and has an insulating property. The first connecting portion 91 is a substantially columnar member provided at the end of the rod portion 90. The first connecting portion 91 includes a movable protrusion 92 that protrudes from the end face, and two connecting pins 93 that protrude from the side face. The movable protrusion 92 is supported by an elastic body such as a coil spring provided inside the first connecting portion 91, for example. The movable protrusion 92 can enter the first connecting portion 91 when a force is applied from the outside. One of the two connecting pins 93 is disposed on the opposite side of the other connecting pin 93. The second connecting portion 94 is used when another indirect live line operation rod is connected to the indirect live line operation rod 9.

  As shown in FIGS. 1 and 2, the wire cutting tool 1 includes a connector 3, a rotating member 2, a movable member 4, a support member 5, a cap 63, a first link 71, and a second link 72. The third link 73, the fourth link 74, the first joint 81, the second joint 82, the third joint 83, and the fourth joint 84 are provided.

  The connector 3 is a member that is connected to the first connecting portion 91 of the indirect hot wire operating rod 9. The connector 3 is substantially cylindrical and has a groove 31 on the outer peripheral surface. The first connecting portion 91 is inserted inside the connector 3 so that the connecting pin 93 fits into the groove 31. The movable protrusion 92 is pushed by the inner wall of the connector 3 and temporarily retracts into the first connecting portion 91. When the connector 3 is twisted with respect to the first connecting portion 91, the connecting pin 93 reaches the folded portion of the groove 31, and the movable protrusion 92 returns (projects) to its original position. Since the movable protrusion 92 is stretched, the connector 3 cannot be removed from the first connecting portion 91. In this way, the connector 3 is connected to the first connecting portion 91.

  The rotating member 2 is a male screw fixed to the connector 3, and rotates according to the operation of the indirect hot wire operating rod 9. As shown in FIG. 2, the rotating member 2 includes a screw portion 21, a smooth portion 22, and a cap fixing portion 23. The axial direction of the screw portion 21 is parallel to the direction orthogonal to the end face of the connector 3 (longitudinal direction of the indirect live wire operation rod 9). As shown in FIG. 3, the screw portion 21 has a thread 211 on the outer peripheral surface. The smooth portion 22 is a columnar member disposed at the end of the screw portion 21. The axial direction of the smooth portion 22 is parallel to the axial direction of the screw portion 21. As shown in FIG. 4, no thread is formed on the outer peripheral surface of the smooth portion 22. That is, the outer peripheral surface of the smooth part 22 is a smooth surface. The cap fixing part 23 is, for example, a male screw protruding from the end surface of the smooth part 22. The cap fixing portion 23 has a screw thread 231 on the outer peripheral surface. As shown in FIG. 4, the outer diameter D23 of the cap fixing portion 23 is smaller than the outer diameter D21 of the screw portion 21 and the outer diameter D22 of the smooth portion 22.

  The movable member 4 meshes with the screw portion 21. The thread 41 provided on the inner peripheral surface of the annular movable member 4 meshes with the thread 211 of the thread portion 21. That is, the movable member 4 is a female screw fitted in the screw portion 21. When the screw portion 21 rotates, the movable member 4 moves in the axial direction of the screw portion 21.

  The support member 5 is attached so as to be rotatable relative to the smooth portion 22. For example, the support member 5 is attached to the smooth portion 22 via a bearing 62 as shown in FIG. The bearing 62 is, for example, a ball bearing. Due to the bearing 62, the support member 5 does not rotate even if the smooth portion 22 rotates. That is, the support member 5 does not rotate with the smooth portion 22. The bearing 62 is press-fitted into the smooth portion 22, for example. The bearing 62 and the support member 5 are positioned by an annular stopper 61 fixed to the smooth portion 22.

  The cap 63 is a member for preventing the support member 5 from coming off. As shown in FIG. 2, the cap 63 is attached to the rotating member 2 at a position opposite to the movable member 4 with respect to the support member 5. For example, the cap 63 is fixed to the cap fixing portion 23 as shown in FIG. The thread 631 provided on the inner peripheral surface of the cap 63 that is annular is engaged with the thread 231 of the cap fixing portion 23. The outer diameter D63 of the cap 63 is larger than the inner diameter D5 of the support member 5.

  The first link 71 is connected so as to be rotatable relative to the movable member 4. For example, the first link 71 is connected to the movable member 4 via the first joint 81. The first link 71 can rotate around the first joint 81. As shown in FIG. 2, the first joint 81 includes a pin 811 and a washer 812. The pin 811 passes through the third link 73 and the first link 71 and is fixed to the movable member 4. Specifically, the first link 71 rotates around a straight line passing through the centers of both end faces of the pin 811. The washer 812 is disposed between the head of the pin 811 and the third link 73.

  The second link 72 is connected so as to be rotatable relative to the first link 71. For example, the second link 72 is connected to the first link 71 via the second joint 82. The second link 72 can rotate around the second joint 82. As shown in FIG. 2, the second joint 82 includes a pin 821, a washer 822, a nut 823, and a washer 824. The pin 821 passes through the second link 72 and the first link 71 and is fixed to the nut 823. Specifically, the second link 72 rotates around a straight line passing through the centers of both end faces of the pin 821. The washer 822 is disposed between the head of the pin 821 and the second link 72. The washer 824 is disposed between the nut 823 and the first link 71.

  The second link 72 is connected so as to be rotatable relative to the support member 5. For example, the second link 72 is connected to the support member 5 via the fourth joint 84. The second link 72 can rotate around the fourth joint 84. As shown in FIG. 2, the fourth joint 84 includes a pin 841 and a washer 842. The pin 841 passes through the fourth link 74 and the third link 73 and is fixed to the support member 5. Specifically, the second link 72 rotates around a straight line passing through the centers of both end faces of the pin 841. The washer 842 is disposed between the head of the pin 841 and the fourth link 74. The second link 72 includes a first blade 75 at the tip. The first blade 75 is located on the opposite side of the second joint 82 with the fourth joint 84 interposed therebetween.

  The third link 73 is coupled so as to be rotatable relative to the movable member 4. For example, the third link 73 is connected to the movable member 4 via the first joint 81. The third link 73 can rotate around the first joint 81. Specifically, the third link 73 rotates around a straight line passing through the centers of both end faces of the pin 811. The third link 73 extends to the opposite side of the first link 71 with the movable member 4 interposed therebetween.

  The fourth link 74 is connected to be rotatable relative to the third link 73. For example, the fourth link 74 is connected to the third link 73 via the third joint 83. The fourth link 74 can rotate around the third joint 83. The third joint 83 includes a pin 831, a washer 832, a nut similar to the second joint 82, and a washer corresponding to the nut. The pin 831 passes through the fourth link 74 and the third link 73 and is fixed to the nut. Specifically, the fourth link 74 rotates around a straight line passing through the centers of both end faces of the pin 831. The washer 832 is disposed between the head of the pin 831 and the fourth link 74.

  The fourth link 74 is connected so as to be rotatable relative to the support member 5. For example, the fourth link 74 is connected to the support member 5 via the fourth joint 84. The fourth link 74 can rotate around the fourth joint 84. Specifically, the fourth link 74 rotates around a straight line passing through the centers of both end faces of the pin 841. The fourth link 74 includes a second blade 76 at the tip. The second blade 76 is located on the opposite side of the third joint 83 with the fourth joint 84 interposed therebetween. The second blade 76 faces the first blade 75. As shown in FIG. 1, the electric wire 100 is put in a gap 78 between the first blade 75 and the second blade 76.

  When cutting the electric wire 100, the electric wire cutting tool 1 is first attached to the indirect hot wire operation rod 9. The operator holds the indirect hot wire operation rod 9 and brings the wire cutting tool 1 close to the wire 100. The wire cutting tool 1 is arranged so that the electric wire 100 enters the gap 78 shown in FIG. When the electric wire 100 enters the gap 78, the indirect hot wire operation rod 9 is rotated. Specifically, the indirect live line operation rod 9 is rotated about an axis along the longitudinal direction of the indirect live line operation rod 9. When the indirect hot wire operating rod 9 rotates, the movable member 4 meshing with the screw portion 21 moves to the connector 3 side as shown in FIG. On the other hand, the support member 5 attached to the smooth portion 22 via the bearing 62 does not move. For this reason, the second joint 82 and the third joint 83 approach each other at the same time as the first joint 81 moves away from the fourth joint 84. As a result, the first blade 75 and the second blade 76 approach each other, and the electric wire 100 is cut by the first blade 75 and the second blade 76. When the movable member 4 contacts the connector 3, the movable member 4 stops. The electric wire 100 is cut before the movable member 4 comes into contact with the connector 3.

  The method for fixing the cap 63 to the rotating member 2 is not limited to the method described above. That is, the cap 63 does not necessarily have to be fixed to the cap fixing portion 23, and may be fixed to the end portion of the smoothing portion 22 by adhesion or welding, for example.

  The bearing 62 is not necessarily a ball bearing. For example, the bearing 62 may be a roller bearing or a slide bearing. The first joint 81 to the fourth joint 84 may each include a bearing on the outer peripheral surface of the pin. Thereby, each movement from the 1st link 71 to the 4th link 74 becomes smooth. Further, the configurations of the first joint 81 to the fourth joint 84 are not limited to those described above, and any configuration can be used as long as at least two links can be relatively rotatably connected.

  As described above, the wire cutting tool 1 includes the rotating member 2, the movable member 4, the support member 5, the first link 71, the second link 72, the third link 73, and the fourth link 74. And comprising. The rotating member 2 includes a threaded portion 21 having a thread 211 and a columnar smooth portion 22 disposed at an end of the threaded portion 21, and rotates according to the operation of the indirect live wire operation rod 9. The movable member 4 meshes with the screw portion 21. The support member 5 is attached so as to be rotatable relative to the smooth portion 22. The first link 71 is connected to the movable member 4 via the first joint 81. The second link 72 is connected to the first link 71 via the second joint 82, is connected to the support member 5 via the fourth joint 84, and has a first blade 75 at the tip. The third link 73 is connected to the movable member 4 via the first joint 81 and extends to the opposite side of the first link 71 with the movable member 4 interposed therebetween. The fourth link 74 is connected to the third link 73 via a third joint 83, is connected to the support member 5 via a fourth joint 84, and has a second blade 76 facing the first blade 75.

  The work using the indirect hot wire operation rod 9 is performed in a narrow space such as a basket of an aerial work vehicle. When using a tool in which a pair of blades are disposed sideways as in the prior art, wires other than the wire 100 to be cut are obstructed, making it difficult to put the wire 100 between the pair of blades. Sometimes. For this reason, work efficiency may fall. On the other hand, in this embodiment, the clearance gap 78 between the 1st blade 75 and the 2nd blade 76 opens in the direction along the longitudinal direction of the indirect hot wire operation stick | rod 9. FIG. That is, the first blade 75 and the second blade 76 are arranged upward. For this reason, the operator can put the electric wire 100 between the first blade 75 and the second blade 76 by moving the electric wire cutting tool 1 straight from the hand toward the electric wire 100. Compared with the prior art, the operation of putting the electric wire 100 between the pair of blades is easy. Therefore, the wire cutting tool 1 can reduce the burden on the operator when the wire 100 is cut.

  Moreover, since the electric wire cutting tool 1 can cut the electric wire 100 by operating the indirect hot wire operating rod 9, less tools are required for cutting the electric wire 100 than a hydraulic cutter or the like, for example. That is, when a hydraulic cutter is used, a hydraulic hose and an operation switch are required. However, when using the wire cutting tool 1, at least an indirect hot wire operating rod 9 is sufficient, so there are few tools to bring into the work space. I'll do it.

  The wire cutting tool 1 includes a cap 63 attached to the rotating member 2 at a position opposite to the movable member 4 with respect to the support member 5. The outer diameter D63 of the cap 63 is larger than the inner diameter D5 of the support member 5. Thereby, the cap 63 prevents the support member 5 from coming off. The supporting member 5 is prevented from falling off the rotating member 2.

  In the wire cutting tool 1, the rotating member 2 includes a cap fixing portion 23 that is a male screw protruding from the smooth portion 22. The outer diameter D23 of the cap fixing portion 23 is smaller than the outer diameter D22 of the smooth portion 22. The cap 63 is fixed to the cap fixing portion 23. Thereby, the support member 5 can be fitted into the smooth portion 22 from the cap fixing portion 23 side, and the cap 63 can be easily fixed.

(First modification)
FIG. 7 is a cross-sectional view corresponding to the BB cross-sectional view of FIG. 2 in the wire cutting tool according to the first modification. Note that the same components as those described in the above-described embodiment are denoted by the same reference numerals, and redundant description is omitted.

  The rotating member 2A according to the first modification includes a cap fixing portion 23A different from the cap fixing portion 23 described above. The cap fixing portion 23 </ b> A is a female screw provided on the end surface of the smooth portion 22, for example. The cap fixing portion 23A has a thread 231A on the inner peripheral surface.

  The cap 63A according to the first modification is fixed to the cap fixing portion 23A as shown in FIG. The thread 631A provided on the outer peripheral surface of the cap 63A meshes with the thread 231A of the cap fixing portion 23A. The outer diameter D63A of the cap 63A is larger than the inner diameter D5 of the support member 5.

  As described above, in the first modification, the rotating member 2 includes the cap fixing portion 23 </ b> A that is a female screw provided on the end surface of the smooth portion 22. The cap 63A is fixed to the cap fixing portion 23A. Thereby, the support member 5 can be fitted to the smooth portion 22 from the cap fixing portion 23A side, and the cap 63A can be easily fixed.

(Second modification)
FIG. 8 is a front view of the wire cutting tool according to the second modification. FIG. 9 is a front view of an indirect hot wire operation rod to which the wire cutting tool according to the second modification is attached. Note that the same components as those described in the above-described embodiment are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIG. 8, the wire cutting tool 1B according to the second modification includes a connector 3B different from the connector 3 described above. The connector 3B includes a connecting shaft 35 that protrudes on the opposite side to the rotating member 2. The connecting shaft 35 is formed in a prismatic shape, for example. The wire cutting tool 1B is attached to the indirect hot wire operation rod 10 shown in FIG.

  As shown in FIG. 9, the indirect live line operation rod 10 is a so-called biaxial rotation operation rod. The indirect hot wire operation rod 10 includes a first rod portion 101, a second rod 102, a third rod 103, a handle 104, a first bridge 105, a second bridge 106, and a connecting portion 107. . The 1st rod part 101, the 2nd rod 102, and the 3rd rod 103 are cylindrical long members, and have insulation. A handle 104 is provided on the first rod portion 101. The second rod 102 is connected to the first rod portion 101 via the first bridge 105 and rotates according to the operation of the handle 104. The third rod 103 is connected to the first rod portion 101 via the first bridge 105, but does not rotate even when the handle 104 is operated. The second bridge 106 connects the second rod 102 and the third rod 103. The connecting portion 107 is provided at the tip of the second rod 102 and includes a hole 1071 and a fastener 1072. The connecting shaft 35 of the connector 3B is fitted into the hole 1071, and the fastener 1072 is fitted into the groove 31B of the connector 3B. For this reason, when the handle 104 is operated, the connecting portion 107 rotates together with the second rod 102, so that the connector 3B and the rotating member 2 rotate.

1, 1B Electric wire cutting tool 100 Electric wire 2, 2A Rotating member 21 Threaded portion 22 Smoothing portion 23, 23A Cap fixing portion 3, 3B Connector 4 Movable member 5 Support member 61 Stopper 62 Bearing 63, 63A Cap 71 First link 72 Second Link 73 Third link 74 Fourth link 75 First blade 76 Second blade 78 Gap 81 First joint 82 Second joint 83 Third joint 84 Fourth joint 9, 10 Indirect hot wire operation rod

Claims (4)

A rotating member that has a threaded portion having a thread, and a cylindrical smooth portion disposed at an end of the threaded portion, and that rotates according to the operation of the indirect hot-wire operating rod;
A movable member meshing with the thread portion;
A support member attached so as to be rotatable relative to the smooth portion;
A first link coupled to the movable member via a first joint;
A second link connected to the first link via a second joint, connected to the support member via a fourth joint, and having a first blade at the tip;
A third link coupled to the movable member via the first joint and extending to the opposite side of the first link across the movable member;
A fourth link connected to the third link via a third joint, connected to the support member via the fourth joint, and having a second blade facing the first blade;
Wire cutting tool comprising A cap attached to the rotating member at a position opposite to the movable member with respect to the supporting member;
The wire cutting tool according to claim 1, wherein an outer diameter of the cap is larger than an inner diameter of the support member. The rotating member includes a cap fixing portion that is a male screw protruding from the smooth portion,
The outer diameter of the cap fixing part is smaller than the outer diameter of the smooth part,
The wire cutting tool according to claim 2, wherein the cap is fixed to the cap fixing portion. The rotating member includes a cap fixing portion that is a female screw provided on an end surface of the smooth portion,
The wire cutting tool according to claim 2, wherein the cap is fixed to the cap fixing portion.

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