JP2013051039A - Insulator clamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insulator clamp, by which an operation for anchoring an aerial wire to an insulator can be easily done by an indirect live wire method, and which is not removed by vibration of an electric wire.SOLUTION: An insulator clamp 1 is provided with a pair of half-cutting clamps 2 pivoted to each other at one end, and semi-cylindrical parts 6 gripping an aerial wire by closing both half-cutting clamps and a recess part 9 gripping an umbrella-shaped part at an end of an insulator are formed on opposed inner faces of a pair of the half-cutting clamps 2. Hinge parts 11 almost parallel to the semi-cylindrical parts are provided between the semi-cylindrical parts 6 of the respective half-cutting clamps and the recess part 9, so that they can be bend to each other. First extension part 12 projecting outward in a radial direction are formed on outside faces of the semi-cylindrical parts of the respective half-cutting clamps, and first engagement means engaged with each other while both of the half-cutting clamps are closed are provided at the first extension parts 12. Second extension parts 15 are formed on outside faces of the recess parts of the respective half-cutting clamps, and second engagement means engaged with each other while closing both of the half-cutting clamps are provided at the second extension parts.

Description

  The present invention relates to an insulator clamp that is used for mooring overhead lines such as power lines and communication lines to an insulator, and in particular, is used as a spacer for supporting an electric wire at a location where high-voltage overhead electric lines cross each other. The present invention relates to an insulator clamp suitable for mooring an overhead wire to a crossing insulator.

  In order to support each other's overhead wires, a crossing insulator 7 as shown in FIG. 4 (a) is provided at the location where the high-voltage overhead wire lines cross each other. Or by using the insulator clamp 1 as shown in FIG.

  FIG. 5 shows an example in which the overhead wire 5 is moored to the crossing insulator 7 by using the insulator clamp 1. The insulator clamp 1 is pivotally supported by the bearing portion 3 so that the upper end portion thereof is pivotally supported in the vertical plane. A pair of half-clamps 2, 2 that open and close is formed, and each half-clamp 2 is formed with a semi-cylindrical portion 6 that sandwiches the overhead wire 5 when both the half-clamps 2 are closed on the upper surface of the opposite side, Further, a semicircular concave recess 9 is formed in the lower portion of the inner surface facing each other when the two half-cutting clamps 2 are closed, and the umbrella-shaped portion 8 of the crossing insulator 7 is sandwiched between them. When the two half-clamps 2 and 2 are closed, the projecting portions 30 and 30 that make up the pair are matched, and a cylindrical cap 31 is externally fitted to that portion so that the moored state is maintained. I have to.

In order to place the overhead wire 5 on the crossing insulator 7 using such an insulator clamp 1, as shown in FIG. 6, the half clamps 2 and 2 forming a pair of the insulator clamp 1 are opened, and one half clamp is opened. 2 is attached to the half-cylindrical part 6 and the recessed part 9 is crossed, and the umbrella-like part 8 is assigned to the concave part 9 and the other half-clamp 2 is rotated in this state so that the overhead line 5 is cut into both half-cuts. At the same time, the umbrella-shaped portion 8 of the crossing insulator 7 is clamped by the concave recess 9.9 that forms a pair of the half-clamps 2, 2. . Then, after the two half-clamps 2 and 2 are butted together, a cylindrical cap 31 is externally fitted to the pair of projecting portions 30 and 30 so that the half-clamps 2 and 2 are not opened.
Then, by performing such an operation on the upper end portion and the umbrella-shaped portion 8 at the lower end portion of the crossing insulator 7, the crossing portion of the overhead wire 5 is moored to the crossing insulator 7.
Incidentally, 32 is a packing for holding the umbrella-shaped portion 8 of the cross insulator 7 so as not to rotate, and 33 is a band for holding the cap 31 to the half-cut clamp 2.

  Moreover, as an insulator clamp, as shown in patent documents 1 and 2 below, when an overhang part is provided on the outer surface of each half clamp, and both the half clamps are closed to this overhang part There is also proposed a configuration in which engaging means that match each other are provided (an engaging projection is provided in one overhanging portion and an engaging hole that engages with the engaging protrusion is provided in the other overhanging portion).

JP 2002-27647 A JP 2010-176975 A

  However, when the overhead wire 5 is moored to the crossing insulator 7 using the above-described insulator clamp 1, the overhead wire 5 is accommodated in the semi-cylindrical portion 6 of the insulator 1 and the umbrella-like portion 8 of the crossing insulator 7 is accommodated. Since it is necessary to accommodate the overhead wire 5 and the umbrella-shaped portion 8 of the crossing insulator 7 at the same time with both half-clamps 2 and 2 while being accommodated in the recessed portion 9, it is very difficult to do indirect hot-line work, especially When the insulator clamp 1 shown in FIGS. 4 to 6 is used, it is necessary to externally fit the cap 31 to the projecting portion 30 that comes into contact with each other after the half-cut clamps 2 and 2 are brought into contact with each other. Indirect hot-line work was very difficult.

In this regard, in the configurations shown in Patent Documents 1 and 2, it is possible to engage both the half-cut clamps with one touch by the engaging means provided in the overhanging portion, but the overhead wire and the umbrella-shaped umbrella It is necessary to sandwich the part at the same time, and the engaging means provided in the overhanging part are simultaneously affected by the shaking of the upper wire and the shaking of the lower wire transmitted through the insulator. Therefore, if the load is excessively concentrated at this engagement location, the engagement state may be released. In addition, if packing is applied to the recessed portion that anchors the umbrella-shaped portion of the insulator, the insulator cannot move in the rotational direction, and thus there is a disadvantage that the load is more likely to be concentrated at the engagement location.
For this reason, the engagement state of both half-cut clamps was released, the half-cut clamps opened, and the insulator dropped, which could cause a serious accident.

  The present invention has been made in view of such circumstances, and has a structure in which the work of mooring the overhead wire to the insulator can be easily performed by the indirect hot wire method and does not come off even by the vibration of the electric wire. The main challenge is to provide a clamp.

  In order to achieve the above object, the insulator clamp according to the present invention includes a pair of half-cut clamps that are pivotally supported at one end and can be opened and closed in a vertical plane. The half cylinder of each of the half clamps in a configuration in which a half cylindrical part for sandwiching the overhead wire by closing both half clamps and a recessed part for sandwiching the umbrella-like part at the end of the insulator are formed. A hinge portion that is substantially parallel to the semi-cylindrical portion is provided between the concave portion and the recessed recess portion so as to be able to bend each other, and radially outward on the outer surface of the semi-cylindrical portion of each half-cut clamp Protruding first overhanging portions are formed, and first engaging means for engaging the first overhanging portions provided in the respective half-cut clamps with both the half-cut clamps closed is provided. The second overhanging portion on the outer surface of the recessed portion of each half-cut clamp And forming, is characterized in that a second engagement means for engaging with each other in a state where the closed both half-cut clamps the second projecting portion provided on the respective half-cut clamp.

  Therefore, when mooring the overhead wire to the umbrella-shaped portion of the insulator, open both half-cut clamps, first attach the half-cylindrical portion of one half-cut clamp to the overhead wire, and rotate the other half-cut clamp in that state. The overhead wire is clamped by the semi-cylindrical parts of both half-cut clamps. And in order to hold | maintain this state, the 1st overhang | projection part of each half-cut clamp is engaged with a 1st engagement means.

  After that, the concave part of the half clamp is bent and opened with the hinge as a boundary, an umbrella-shaped part of a cross insulator is inserted between the concave parts of both half clamps, and both the half clamps are closed with the hinge as a boundary. Then, the umbrella-shaped portion of the insulator is sandwiched between the concave portions of both half-cut clamps. And in order to hold | maintain this state, the 2nd overhang | projection part of each half cut clamp is engaged with a 2nd engagement means.

Here, the second engaging means includes a first engaging portion for engaging the second projecting portion of each of the half-cut clamps in a direction in which the half-cut clamps are closed with each other, After the clamp is closed, it is preferable to have a second engagement portion that engages one of the second overhanging portions from the back surface of the other second overhanging portion.
In such a configuration, the shape state of the first engagement portion has a double hook structure that cannot be released unless the second engagement portion is released, so that the engagement state may be released due to the shaking of the electric wire. Disappear.

  The first overhanging portion is formed in a shape that can be gripped by an indirect hot wire tool, and the first engaging means forms an engaging protrusion on the first overhanging portion of one half-cut clamp, It is preferable that an engagement hole engageable with the engagement protrusion is formed in the first overhanging portion of the other half-cut clamp. In such a configuration, the first overhanging portion can be attached to the electric wire by gripping the first overhanging portion with an indirect hot wire tool, and an engagement state by the first engagement means is formed. It becomes possible.

Further, the second overhanging portion is formed in a shape that can be gripped by an indirect hot wire tool, and the first engaging portion of the second engaging means is the second overhanging of the one half clamp An engaging hole is formed in the second projecting portion of the other half clamp, and the engaging hole engageable with the engaging protrusion is formed. The second engaging portion forms an engaging hole in the second overhanging portion of the one half-cut clamp, and the second overhang of the one half-cutting clamp in the second overhanging portion of the other half-cutting clamp. A bent portion that can be bent is provided so as to sandwich the portion, and an engaging protrusion that can be engaged with the engaging hole from the back of the one half-cut clamp may be provided on the bent portion.
In such a configuration, it is possible to attach the insulator to the umbrella-shaped portion by gripping the second overhanging portion with an indirect hot wire tool, and to engage with the second engaging means. A state can be formed.

  As described above, according to the insulator clamp according to the present invention, between the semi-cylindrical part and the recessed concave part of each half-clamp, it is possible to bend through the hinge part that is substantially parallel to the semi-cylindrical part, A first projecting portion projecting radially outward is formed on the outer surface of the semi-cylindrical portion of each half clamp, and both the half clamps are closed to each other in the first projecting portion of each half clamp. First engaging means for engaging is provided, and a second projecting portion is formed on the outer surface of the recessed portion of each half clamp, and both half trims are formed on the second projecting portion of each half clamp. Since the second engaging means for engaging each other with the clamps closed is provided, an overhead wire is sandwiched between the half cylindrical portions of the two half-cut clamps, and the first of the two half-cut clamps is held by the first engagement means. After engaging the overhanging part of the half-clamp, the concave part of the half-clamp is bent and opened with the hinge as the boundary, Insert an umbrella-shaped portion of a cross between the recesses, sandwich the umbrella-shaped portion of the insulator between the concave recesses of both half-cut clamps, and engage the second overhanging portion of both half-cut clamps by the second engaging means. Can be combined. For this reason, it is not necessary to sandwich the overhead wire and the umbrella-shaped portion of the insulator at the same time by the insulator clamp, and it is possible to easily carry out by the indirect hot wire method.

  Further, the half-clamping part to which the half-cylinder part of the half-cutting clamp to which the overhead wire is attached is engaged by the first engaging means at the first overhanging part formed on the outer side surface thereof, and the umbrella-like part of the insulator is attached. Since the recessed portion is engaged by the second engaging means formed on the outer surface thereof, the load applied to the insulator clamp can be distributed to each engaging means, and the first Since the engaging means and the second engaging means are disposed on both sides of the hinge portion, the hinge portion can also absorb vibration to some extent.

  In addition, a first engaging portion that engages the second engaging means by displacing both half clamps in a closing direction, and a latch provided on one overhang portion after both half clamps are closed. The second engagement portion is released from the engagement state of the first engagement portion by including the second engagement portion that engages the piece from the back surface of the other overhanging portion. Unless it is done, it cannot be released, and the engaged state will not be released due to the shaking of the electric wire.

FIG. 1 is a side view showing the overall configuration of the insulator clamp according to the present invention. FIG. 2 is a perspective view showing an insulator clamp according to the present invention. FIG. 3 is a view of the step of attaching the insulator clamp according to the present invention as viewed from the axial direction of the overhead wire, (a) is a view showing a state immediately before the half-cut clamp is opened and attached to the overhead wire, ) Is a view showing a state immediately after the insulator clamp is attached to the overhead wire after being attached to the overhead wire and immediately before being attached to the umbrella-like portion of the insulator, and (c) so as to sandwich the umbrella-like portion of the insulator. It is a figure which shows the state which closed the half clamp, (d) is a figure which shows the state engaged by the 2nd engagement means. FIG. 4A is a diagram showing the crossing insulator. The upper stage is a plan view (top view) of the crossing insulator, the middle stage is a side view of the crossing insulator, the lower stage is a bottom view (bottom view) of the crossing insulator, and FIG. b) is a view showing a conventional insulator clamp, and is a side view of an upper insulator clamp and a lower view of a lower insulator clamp. FIG. 5 is a view showing a state in which an overhead wire is moored to a crossing insulator using a conventional insulator clamp, and (a) is a state in which the overhead wire is moored via an insulator clamp at the upper and lower ends of the crossing insulator. (B) is the enlarged view which looked at the state where the overhead line was moored through the insulator clamp at the upper end part of a crossing insulator from the perpendicular direction, and (c) These are the enlarged views which looked at (b) from the axial direction of the overhead wire. FIG. 6 is an explanatory view for explaining an attaching process for attaching an overhead wire to a crossing insulator using a conventional insulator clamp.

  Embodiments of the insulator clamp of the present invention will be described below with reference to the accompanying drawings.

  In FIG. 1 and FIG. 2, the insulator clamp 1 is constituted by a pair of half-clamps 2, 2 formed of an insulating hard synthetic resin material such as hard polyethylene. The pair of half-cut clamps 2 and 2 are formed in the same shape, and a bearing portion 3 is formed at one end portion (upper end portion in the figure). Are pivoted about the support shaft 4 so as to be openable and closable in a vertical plane. Has been.

A semi-cylindrical portion 6 that is formed parallel to the support shaft 4 and sandwiches the overhead wire 5 by closing both the half-cut clamps 2.2 is formed on the upper part of the inner surface of each half-clamp 2, 2. In addition, on the lower part of the inner surface of each half-clamp 2, 2, a saddle-like depression that sandwiches the umbrella-like part 8 provided at the end of the crossing insulator 7 by closing both the half-clamps 2, 2. 9 is formed.
An axis of the semi-cylindrical portion 6 is provided between the semi-cylindrical portion 6 and the concave recess portion 9 of each half clamp 2, 2, that is, in the relay portion 10 that connects the semi-cylindrical portion 6 and the concave recess portion 9 Is formed by, for example, forming a constriction in which a part of the relay portion 10 is formed in a thin shape, and the concave portion side (in the figure of the half clamp) The lower half part can be bent outward (rotatable) relative to the semi-cylindrical part side (the upper half part in the drawing of the half clamp).

  The semi-cylindrical part 6 extends in the axial direction from the relay part 10, and a first projecting part that protrudes radially outward is formed on the outer surface of the extended part of the semi-cylindrical part 6. 12 and 12 are formed. In this example, the 1st overhang | projection part 12 is formed in the shape which can be hold | gripped with an indirect hot wire tool in the both ends of a semi-cylindrical part, and in this example, it is in the open surface of a semi-cylindrical part. It is formed in the shape of a flat plate extending along. The first overhanging portion 12 is provided with first engaging means that engages with each other in a state in which the half-cut clamps 2 and 2 are closed.

  Specifically, the first engaging means is integrally formed with an engaging projection 13 that protrudes toward the open surface of the half clamp 2 on the first overhanging portion 12 of one of the half clamps 2 and 2. The other overhanging portion 12 is formed with an engagement hole 14 into which the engagement protrusion 13 is inserted. The shape of the engagement protrusion 13 is not particularly limited, but it is desirable that a strong engagement state be formed when the engagement protrusion 13 is inserted into the engagement hole 14.

  Moreover, the 2nd overhang | projection part 15 projected to the outer side which opposes along an open surface is formed in the outer side surface of the recessed recessed part 9 of each half clamp 2 and 2. As shown in FIG. This 2nd overhang | projection part 15 is formed in the shape which can be hold | gripped with an indirect hot wire tool in the both ends of a recessed part, and is extended along the open surface of the recessed part 9 in this example. It is formed in a flat plate shape. The second overhanging portion 15 is provided with second engaging means that engages with each other in a state where both the half clamps 2 and 2 are closed.

  The second engaging means includes a first engaging portion 21 that engages the half-cut clamps 2 and 2 in a closing direction, and the half-engaged clamps 2 and 2 adjacent to the first engaging portion 21. And a second engaging portion 22 that engages one of the overhanging portions from the back surface of the other overhanging portion.

  More specifically, one of the second overhang portions 15 extends substantially parallel to the axial direction of the semi-cylindrical portion, and the first engagement allowance 21a is provided on the side close to the recessed recess portion 9. A second engagement allowance 22a is formed on the side that is formed and is far from the recessed portion 9 (the front end side of the second overhanging portion 15). The other of the second overhanging portions 15 extends substantially parallel to the axial direction of the semi-cylindrical portion, and extends substantially vertically from the tip portion toward the semi-cylindrical portion. A portion where the first engagement allowance 21b is formed on the side of the portion extending substantially parallel to the axial direction of the cylindrical portion and closer to the recessed portion, and extending from the tip portion toward the semi-cylindrical portion side Is a bent portion 22c that can be bent so as to sandwich the second overhanging portion 15 of one half-cut clamp, and a second engagement allowance 22b is formed at the tip of the bent portion 22c.

  An engagement protrusion 24 is formed in the first engagement allowance 15a of one second overhanging portion 15, and the first engagement allowance 21b of the other second overhanging portion 15 is Engagement holes 25 that engage with the engagement protrusions 24 are formed. In addition, an engagement hole 26 is formed in the second engagement allowance 15b of one second overhanging portion 15, and in the second engagement allowance 22b of the other second overhanging portion 15, Engagement protrusions 27 that can be engaged from behind are formed in the engagement holes 26. In addition, an engagement hole 28 that is aligned with the engagement hole 26 is formed at a position facing the engagement hole 26 of the other second overhanging portion 15 as necessary.

  The engagement protrusion 24 formed in the first engagement allowance 21a of the one second overhanging portion 15 and the engagement formed in the first engagement allowance 22a of the other second overhanging portion 15 The first engagement portion 21 is constituted by the hole 25, and the engagement hole 26 formed in the second engagement allowance 21b of one second overhang portion 15 and the other second overhang. The second engagement portion 22 is configured by the engagement hole 28 formed as necessary in the portion 15 and the engagement protrusion 27 formed in the second engagement allowance 22b of the other overhanging portion 15. .

  Therefore, in the state where the second overhanging portion 15 is closed so that the open ends of the half-cut clamps 2 and 2 are abutted with each other, the first engagement allowance 21 of each second overhanging portion 15 with an insulating jacket. By sandwiching a in the direction of closing both half clamps, the engagement protrusions 24 formed on one second overhanging portion 15 are inserted into the engagement holes 25 formed on the other second overhanging portion 15. The bent portion 22c formed on the other second overhanging portion is folded back so as to sandwich the one second overhanging portion side, and in this state, both the second overhanging portions are insulated , The engagement protrusion 27 formed on the other second overhanging portion is fitted from behind to the engagement hole 26 formed in the one second overhanging portion. (If the engagement hole 28 is formed in the other second overhanging portion 15, the engagement hole 28 is also fitted. Has become so).

  The packing conventionally provided on the inner surface of the concave recess 9 of both half-clamps 2 and 2 is omitted in this embodiment so that the deviation in the rotating direction of the insulator due to the vibration of the overhead wire can be allowed. Yes.

  In the above configuration, the case where the upper overhead wire 5 is moored to the crossing insulator 7 using the above-described insulator clamp 1 will be described. First, one of the first overhanging portions 12 of the insulator clamp 1 is made of an insulating jacket. While holding the two half-clamps 2 and 2 open, the overhead wire 5 is inserted so as to be inserted from above the overhead wire 5 (see FIG. 3 (a)). .2 between the semi-cylindrical parts 6 forming a pair. Thereafter, both the half clamps are closed, and both the first overhanging portions 12 are overlapped with each other by holding the first overhanging portions 12 with each other by hooking the first overhanging portions 12 with each other. Engaging with the joint hole 14).

Thereafter, one of the second overhanging portions 15 is gripped by an insulating Yatco, and the concave portions 9 are bent outwardly with the hinge portion 11 as a boundary to widen the pair of concave portions, and there is a crossing between them. 7 umbrella-shaped part 8 is inserted, and the recessed concave part which makes this umbrella-shaped part 8 a pair is closed and pinched | interposed.
After that, the first engagement portion 21 of the second engagement means is hooked by holding the first engagement piece of both the second overhanging portions 15 with an insulating jacket so as to sandwich the first engagement piece (engagement protrusion 24). After that, the bent portion 22c formed with the engaging protrusion 27 is bent to sandwich the second engagement margin 21b, and both the second overhang portions 15 are insulated with an insulating jacket. The second engagement piece is sandwiched and inserted into the engagement hole 26 (and the engagement hole 28 if necessary) from the back side, so that the second engagement means second is engaged. The engagement portion 22 is hooked.

  As a result, when the overhead wire 5 is moored to the crossing insulator 7, it is not necessary to simultaneously sandwich the overhead wire 5 and the umbrella-shaped portion 8 of the crossing insulator 7 by the two half-clamps 2, 2. Since the crossing insulator 7 can be attached to the insulator clamp 1 after once attaching 1, the indirect hot-line operation can be easily performed. In addition, since the holding of both half-cut clamps 2 and 2 is a hook fastening type, it is possible to operate with an insulating jacket, and the insulator clamp 1 is fastened at two locations of the first engaging means and the second engaging means. Therefore, the load caused by the swing of the overhead wire 5 can be distributed to the first engaging means and the second engaging means. In addition, since the second engaging means has a double hook structure with the first and second engaging portions 21 and 22, the first engaging portion 21 of the first engaging portion 21 is not released unless the engagement state of the second engaging portion 22 is released. The engaged state is not released, and the hook is hardly detached due to the swing of the overhead wire 5, and it is possible to maintain a firm attachment state.

  Further, in this example, since the packing which has been conventionally attached inside the clamp is removed and the crossing insulator 7 can freely rotate around the axis, it is possible to absorb the vibration of the overhead wire 5 and the engagement state. Is more difficult to come off.

In the above-described configuration, the engagement protrusion 27 constituting the second engagement portion 22 is provided at the distal end portion of the bent portion 22c extending to the semi-cylindrical portion side, and the bent portion 22c is folded back from above. The bent portion 22c is configured to be bent and inserted from behind, but the bent portion 22c extends in the same direction as the axial direction of the semi-cylindrical portion 6 so that the bent portion is sandwiched from the side. The engaging protrusion 27 may be provided in a bent portion extending on the side opposite to the semi-cylindrical portion, and the bent portion may be folded back from below. Further, the positional relationship between the engagement protrusion and the engagement hole may be reversed.
Moreover, although the hinge part 11 formed between the semi-cylindrical part 6 and the recessed recessed part 9 of each half clamp 2 and 2 employ | adopted the form which provides a constriction so that it may be bent easily, it gives durability. For this purpose, a hinge may be attached separately.

DESCRIPTION OF SYMBOLS 1 Insulator clamp 2 Half-cut clamp 5 Overhead wire 6 Semi-cylindrical part 7 Crossing insulator 8 Umbrella-shaped part 9 Recessed recessed part 11 Hinge part 12 1st overhang | projection part 13 Engagement protrusion 14 Engagement hole 15 2nd overhang | projection part 24 engagement protrusion 25 engagement hole 26 engagement hole 27 engagement protrusion

Claims (4)

A semi-cylindrical shape that has a pair of half-cut clamps that are pivotally supported at one end and can be opened and closed in a vertical plane, and that clamps the overhead wire by closing the half-cut clamps on the inner surfaces facing each other In the insulator clamp in which the recessed portion for sandwiching the umbrella-shaped portion at the end of the insulator and the insulator is formed,
A hinge portion that is substantially parallel to the semi-cylindrical portion is provided between the semi-cylindrical portion and the recessed recess portion of each of the half-cut clamps, and can be bent mutually.
A first projecting portion projecting radially outward is formed on an outer surface of the semi-cylindrical portion of each half clamp, and both the half trims are formed on the first projecting portion provided in each half clamp. Providing first engaging means for engaging each other with the clamp closed;
A second overhang is formed on the outer surface of the concave recess of each half clamp, and the second overhang provided on each half clamp is engaged with each other in a state where both the half clamps are closed. An insulator clamp characterized in that second engaging means is provided.   The second engaging means closes both the half-clamps, a first engagement part that engages the second projecting part of each of the half-clamps in a direction in which the half-clamps are mutually closed. 2. The insulator clamp according to claim 1, further comprising a second engagement portion that engages one of the second overhang portions from the back surface of the other of the second overhang portions. The first overhang portion is formed in a shape that can be gripped by an indirect hot wire tool,
The first engaging means includes an engaging projection formed on a first overhanging portion of one half-cut clamp, and an engaging protrusion engageable with the engaging protrusion on the first overhanging portion of the other half-cutting clamp. The insulator clamp according to claim 1 or 2, characterized in that a hole is formed. The second overhang portion is formed in a shape that can be gripped with an indirect hot wire tool,
The first engaging portion of the second engaging means forms a first engaging protrusion on the second overhanging portion of one half clamp, and the second overhanging portion of the other half clamp Formed with a first engagement hole engageable with the first engagement protrusion,
The second engaging portion of the second engaging means forms a second engaging hole in the second overhanging portion of the one half cutting clamp, and the second overhanging of the other half cutting clamp. A bent portion that can be bent so as to sandwich the second overhanging portion of the one half clamp, and the second engagement hole can be engaged with the bent portion from behind the one half clamp. The insulator clamp according to claim 2, further comprising a second engaging protrusion.

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