JP2011062004A - Sheet clamp for indirect work technique, and indirect sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet clamp for an indirect work technique that is used for normal temporary-fixing of an insulating sheet, and also used as an electric-wire clamping device for easily and stably clamping a plurality of electric wires in a hot-line state when executing the indirect hot-line work, and an indirect sheet. <P>SOLUTION: The sheet clamp for an indirect work technique is configured as follows. A first clamping member and a second clamping member includes a clamping part formed with a recess, reaching both side edges, and an operation unit, respectively. The first clamping member and the second clamping member are turnably and pivotally supported to each other with respect to the counterpart while the clamping parts are biased in a direction of approaching to each other. The first clamping member has a bent part or a protrusion protruding toward the tip of the second clamping member or a space near the tip. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  In the hot line construction of high-voltage overhead distribution lines, the present invention is not limited to fixing an insulating sheet to be placed on a charged part of an electric wire, and the end of an electric wire cut at the time of replacing the distribution device is used for other electric wires and other devices. The present invention relates to an indirect hot wire sheet scissor that can be used for temporary fixing (hereinafter, simply referred to as an indirect method sheet scissor) and an indirect sheet in which the indirect method sheet scissor is attached to an insulating sheet.

  In hot line construction of high-voltage overhead distribution lines, when working close to the distribution lines, cover the live parts of the wires around the work position with insulation sheets, sheet clips or sheet scissors (hereinafter collectively referred to as both) Then, the sheet is called scissors.) FIG. 10 shows an example of a conventional scissors for an indirect method, in which (a) is a plan view and (b) is a side view. The sheet scissors 8 in this example are usually formed of a hard plastic material or the like, and as shown in FIG. 10A, the upper and lower clamping members 10 and 11 and a shaft 15 that pivotally supports them in the middle. And an annular cover 14 fitted to the upper and lower clamping members 10 and 11 so as to cover it at the position of the shaft 15. The upper and lower clamping members 10 and 11 are slipped and stopped in directions opposite to each other so that the operation portion on the right side of the position of the shaft 15 in the drawing can be gripped by one indirect gripping tool such as a yatco. Upper and lower grips 10a and 11a having a flat surface are formed. Further, concave portions 10b and 11b that are gently curved and recessed and concave portions 10C and 11C that are notched in a rectangular shape in a side view are formed on the inner surfaces facing each other on the left side (sheet clamping side) of the shaft 15. ing. The sheet clamping sides of these upper and lower clamping members 10 and 11 are urged in the direction of approaching and closing each other by a coil spring (not shown) fitted to the shaft 15, and in the closed state, the surfaces of the upper and lower grips 10a and 11a Are substantially parallel to each other (see Patent Document 1).

  By the way, when the distribution transformer is replaced or the high voltage cutout is replaced by the indirect hot wire method, it is necessary to cut the high voltage underline and open the electric circuit. Normally, the underline is in a charged state, so that it is possible to prevent the occurrence of a ground fault, etc., and cut the high-voltage underline one by one or cut two lines so as not to hinder the replacement work. The indirect method sheet scissors 1 as shown in FIG. 10 are used to temporarily fix them to an aerial distribution line or an uncut high-voltage underline (see FIG. 11). In that case, it is easy to hold only one high-voltage underline with the scissors and to temporarily fix it to the uncut underline, and the holding underline does not come off. However, when performing transformer suspension work, the two high-voltage underlines that have been cut are sandwiched with scissors and temporarily fixed to the undrawn underline, etc. It is necessary, and an unskilled worker may take a long time just to temporarily fix it. In addition, even if the temporary fixing work of the electric wire is completed carefully, the underline may vibrate due to wind, etc., and one or both of the cut high-voltage underlines may come off by applying an instrument or the like during other operations. was there.

  For example, an indirect sheet in which the conventional sheet for scissors shown in FIG. 10 is combined with a soft insulating sheet can be used for temporarily fixing an electric wire. The underline itself cannot be reliably protected, and the underline may come out of the gap of the indirect sheet.

Japanese Patent No. 3709104 JP 2009-171709 A

  In view of the above circumstances, the present invention is not only used for temporary fixing of a normal insulating sheet, but also used as an electric wire holding tool that can easily and stably hold a plurality of live wires in an indirect hot wire construction. The aim is to provide a sheet of scissors and indirect sheets for possible indirect methods.

  According to one aspect of the present invention, the first and second holding members each having a holding portion formed with a recess reaching both side edges and an operation portion can be rotated with respect to each other. And an indirect construction sheet scissor which is pivotally supported in a direction in which the sandwiching portions approach each other, and the first sandwiching member is a front end portion of the second sandwiching member or a space near the front end portion. This is achieved by scissors for an indirect method, characterized by comprising a bent portion or a protruding portion protruding toward the surface.

  The bent portion can be rotated via a shaft provided at the distal end portion of the first clamping member, or can be configured to be detachable from the distal end portion. Further, when the first holding member has a protrusion, a concave groove that can receive and engage the protrusion can be formed at the tip of the second holding member.

  When the plurality of electric wires are clamped here, the concave portions of the respective clamping portions can be configured so that they can be clamped independently. For example, each of the recesses is filled with a soft cushioning material capable of individually holding a plurality of electric wires by deforming itself, or a plurality of the respective recesses are continuously arranged in the length direction of each sandwiching part. Or it can be formed in a similar shape.

  The object is achieved by an indirect sheet comprising a combination of the sheet for indirect construction method and a soft insulating sheet.

  Since the sheet scissors for the indirect method of the present invention are provided with a bent portion or a protruding portion projecting toward the distal end side of the second sandwiching member at the distal end portion of the first sandwiching member, a plurality of electric wires are sandwiched with this, Even when stopping, all or some of the plurality of electric wires are not disconnected, and even an unskilled worker can perform the work in a short time, thereby improving work efficiency. In addition, since it is only necessary to partially improve the sheet for the conventional indirect method, it is easy to produce the sheet for the indirect method according to the present invention. It can also be used to securely hold

It is a figure which shows an example of embodiment of the sheet | seat for indirect construction methods of this invention. It is a figure which shows another example of embodiment of the sheet | seat for indirect construction methods of this invention. It is a figure which shows another example of embodiment of the sheet | seat for indirect construction methods of this invention. It is a figure which shows another example of embodiment of the sheet | seat for indirect construction methods of this invention. It is a figure which shows another example of embodiment of the sheet | seat for indirect construction methods of this invention. It is a figure which shows another example of embodiment of the sheet | seat for indirect construction methods of this invention. It is a figure which shows another example of embodiment of the sheet | seat for indirect construction methods of this invention. It is a figure which shows an example of embodiment of the indirect sheet | seat of this invention. FIG. 8 is an exploded view of the embodiment shown in FIG. 7. It is a figure which shows the conventional example of the sheet | seat for indirect construction methods. It is a figure which shows the use condition of the conventional sheet for indirect construction methods.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following drawings, the same reference numerals are used for the same or common parts, and duplicate descriptions are omitted. In addition, each embodiment shown in FIGS. 2 to 7 is a modification of the embodiment shown in FIG. 1, and in the following, in order to relax the explanation, the embodiment shown in FIG. Differences are explained, and explanations of other configurations are omitted unless necessary. 2 to 7 may be omitted from the configuration illustrated in FIG.

  Drawing 1 is a figure showing an example of an embodiment of a sheet scissors for indirect methods of the present invention. As shown in this figure, the sheet 1 scissors for indirect method of the present invention is supported so that the first holding member 10 and the second holding member 11 are pivotable with respect to each other around the shaft 15. A bent portion 22 that protrudes toward the second clamping member 11 is provided at the tip of the first clamping member 10.

  The first clamping member 10 and the second clamping member 11 are respectively provided with clamping parts 10a and 11a and operation parts 10b and 11b on both sides with the shaft support position of the shaft 15 as a boundary. A coil spring (not shown) is fitted to the shaft 15, and both end portions thereof extend inside the operation portions 10b and 11b, respectively, thereby urging the clamping portions 10a and 11a toward each other. Has been.

  Each clamping part 10a, 11a is each provided with the substantially rectangular parallelepiped shape, and the recessed part 10c, 10d; 11c, 11d is formed in the inner surface which mutually opposes so that these length direction both-side edges may be reached. . The recesses 10c and 11c are formed as dents that are gently curved when viewed from the side, and the recesses 10d and 11d are notched into a rectangular shape when viewed from the side. Further, through holes 12 and 13 penetrating through both side edges are formed in the front end portions of the sandwiching portions 10a and 11a, respectively. Moreover, in order to reduce weight while maintaining the strength characteristics of the scissors for the indirect method of the present invention on the outer surfaces of the sandwiching portions 10a, 11a facing in opposite directions, there are a plurality of lengths along the respective length directions. The slits 11f, 11f,... Are provided in alignment. The cross-sectional shape and depth of the slit 11f and the number of slits 11f arranged on the outer surface of each sandwiching portion can be appropriately set in consideration of the strength of the scissors themselves, deformation resistance, etc. of the present invention.

  On the outer surfaces of the operation portions 10b and 11b facing each other, grip surfaces having a flat surface subjected to slipping and stopping are formed, and when the sandwiching portions 10a and 11a are closed, these grip surfaces are It is comprised so that a side view may become substantially parallel. By forming the grip surface in this manner, the surface can be reliably gripped with an indirect live wire gripping tool such as a Yatsuko.

  The bent portion 22 at the distal end portion of the first clamping member 10 is formed so as to protrude toward the space near the distal end portion of the second clamping member 11 so as to cover it. As shown in FIG. 1, it is preferable to provide an appropriate gap between the inner surface of the bent portion 22 and the distal end surface of the second holding member 11. In this case, when the plurality of electric wires are clamped with the scissors 1 for the indirect method of the present invention, the size of the gap of the electric wires to be clamped is prevented so that some or all of the electric wires do not come out through this gap for some reason. It is preferable to set it to be approximately equal to or less than the diameter. The size of the interval can be set to be substantially the same from the root of the bent portion 22 to the tip, or slightly reduced toward the tip. Needless to say, it is possible to eliminate the gap between the inner surface of the bent portion 22 and the front end surface of the second clamping member 11 and to bring them into contact with each other.

  The angle formed between the distal end surface of the second clamping member 11 and the length direction thereof can be arbitrarily set within a range of about 70 to 150 °, and is preferably set to a substantially right angle or about 135 ° (see FIG. 2). ).

  The first clamping member 10 and the second clamping member 11 can be formed by integrating the clamping portions 10a and 11a and the operation portions 10b and 11b with an insulator such as hard plastic. These moldings can be performed using, for example, an injection molding method.

  FIG. 3 shows another example of the embodiment of the sheet scissors for the indirect method of the present invention. In the indirect construction sheet scissors 1 shown in this figure, a shaft 28 provided in parallel to the width direction at the front end of the sandwiching portion 10a is substantially perpendicular to a position parallel to the length direction of the sandwiching portion 10a. The bent portion 22 is rotatable to the position. In this case, the bent portion 22 may be fixed at an appropriate position, and when the bent portion 22 is fixed to the distal end side of the first clamping member 10 in parallel with the length direction, the second portion The front end portion of the holding member 11 can be configured to be extendable and contractable by a known method. Further, the bent portion 22 is urged toward the distal end surface of the clamping portion 11a of the second clamping member 11 using a known urging means such as a coil spring that can be attached to the shaft 28 by a normal method. Can be configured. Other configurations are essentially the same as those of the embodiment shown in FIG.

  FIG. 4 shows still another example of the indirect construction sheet scissors embodiment of the present invention. The indirect construction sheet scissors 1 shown in this figure includes a bent portion 31 that is detachably attached to the tip of the clamping portion 10a (first clamping member 10). The bent portion 31 has an insulating body that is substantially L-shaped in side view, and a flat insertion protrusion 33 is formed from the approximate center of the joint surface that is in contact with the distal end surface of the holding portion 10a. Projected. A through hole 34 having a diameter substantially the same as that of the through hole 12 drilled at the distal end portion of the holding portion 10a is bored in a substantially central region of the insertion protrusion 33. On the other hand, a groove 35 that can receive the insertion protrusion 33 is provided on the front end surface of the clamping portion 10a. By inserting the insertion protrusion 33 into the groove 35, the through-hole 34 matches the through-hole 12 drilled at the tip of the sandwiching portion 10a. By inserting the insertion member 33 into the groove 35 and inserting a cylindrical or cylindrical pin or the like having an outer diameter substantially equal to or slightly smaller than the through hole 12, the bent portion 31 is the tip of the sandwiching portion 10 a. Attached to. The indirect method sheet scissors 1 of this embodiment can be used for temporarily fixing an insulating sheet as usual when the bent portion 31 is mounted when used for temporarily fixing an electric wire. In the present embodiment, other configurations are essentially the same as those in FIG.

  FIG. 5 shows an example of an embodiment in which a protruding portion 35 is provided instead of the bent portion 22 (see FIG. 1) at the distal end portion of the sandwiching portion 10a (first sandwiching member 10). In this figure, the operation unit side is not substantially different from that in FIG. The projecting portion 35 has a substantially quadrangular pyramid shape, and is provided at the substantially center in the width direction on the inner surface of the distal end portion of the first clamping member 10. On the other hand, a concave groove 36 that receives and engages with the projection 35 is formed on the inner surface of the distal end of the clamping part 11a (second clamping member 11). Thus, by adopting a configuration in which the protrusion 35 and the groove 36 are engaged with the sandwiching portions 10a and 11a closed, when a plurality of electric wires are sandwiched between the sandwiching portions 10a and 11a, It can be configured so that a part or all of the electric wire does not come out of it for some reason.

  FIG. 6 shows, as still another example of the embodiment of the sheet scissors according to the present invention, an improved version of the concave portion of each clamping member in the embodiment shown in FIG. In the indirect method sheet scissors shown in this figure, the concave portions of the sandwiching portions 10a and 11a are only curved recesses 10g and 11g extending in the length direction, and the concave portions 10g and 11g are made of soft cushion materials 18 and 19, respectively. Buried. In particular, when using the sheet scissors 1 for the indirect method of the present embodiment for temporarily fixing the electric wires, by providing the cushion members 18 and 19 in this way, as shown in FIG. 6B, a plurality of electric wires W1, W2, W3 can be clamped individually and stably. In addition, there is flexibility in that the electric wire can be held obliquely with respect to the holding portions 10a and 11a. Even after temporarily fixing a plurality of electric wires, even if some of these are displaced to the distal end side in the cushioning materials 18 and 19 due to vibration or the like and push up one of the clamping portions 10a and 11a, Since the sheet scissors for indirect methods of the embodiment include the bent portion 22, the electric wire does not come out of the sheet scissors.

  FIG. 7 shows still another example of the embodiment of the present invention in which the concave portions of the respective clamping members in the embodiment shown in FIG. That is, in the present embodiment, a saw blade-like recess 10h in which a plurality of triangular cuts in a side view are continuously arranged on the opposing inner surfaces of the sandwiching portions 10a and 11a in the length direction of each sandwiching portion 10a and 11a. 10h,..., 11h, 11h,. In the embodiment shown in this figure, when the insulating sheet placed on the electric wire or the like is sandwiched and fixed with this, it is possible to prevent the insulating sheet from being displaced by this recess. Moreover, when pinching a plurality of electric wires using scissors for the indirect method of the present embodiment, the electric wires are pinched in the respective openings 20 having a triangular cross section formed by these concave portions 10h and 11h. Can do. When some or all of the plurality of electric wires have to be sandwiched obliquely with respect to the saw-tooth-shaped recesses 10h and 11h, the sandwiching portions 10a and 11a cannot be completely closed. Since the bent part 22 is provided in the part, the electric wire does not come out and a plurality of electric wires can be securely held.

  The sheet scissors for the indirect method of the present invention can be used as an indirect sheet in combination with an insulating sheet. FIG. 8 shows an embodiment of the indirect sheet of the present invention, and FIG. 9 is a view for explaining the configuration of the indirect sheet shown in FIG. The indirect sheet 2 shown in these drawings includes the indirect method sheet scissors 1 shown in FIG. 1, an insulating sheet 42, and two rod-like bodies 40 and 41. In addition, since the sheet scissors 1 for the indirect method have already been described, redundant description will be omitted.

  The insulating sheet 42 is an insulating soft sheet having a rectangular plane, and is used by folding it in half from an intermediate fold 42a. In FIG. 8 and FIG. 9, the two sections obtained by folding in this way are indicated by reference numerals 43 and 44, respectively.

  In each of these two sections 43 and 44, cylindrical insertion members 45 to 48 (each of the openings are denoted by reference numerals) that are opened in parallel to the respective sides near the two sides parallel to the crease 42a on the same surface. 45a, 46a, 47a, 48a). Each inserted member 45 to 48 may be formed of the same kind of material as that of the insulating sheet as long as it is insulative, or may be formed of a different kind of material. When each of the insertion members 45 to 48 is formed of a different material, it may be soft or hard, but is preferably soft. Between the insertion members 45 and 46 and between the insertion members 47 and 48, the distance corresponding to the width of the sandwiching portions 10 a and 11 a of the scissors 1 for the indirect method is separated.

  In each section 43, a predetermined position close to the inserted members 45, 46 between the crease 42 a and the inserted members 45, 46 (when the insulating sheet 42 is sandwiched between the sheet scissors 1 for the indirect method) One flexible bending portion 43b can be provided in parallel to these at the base portion of the bending portion 22 with the sandwiching portion 10a. Similarly, the section 44 can be provided with a single flexible bent portion 44b in parallel with the inserted members 47 and 48 in the vicinity thereof. By providing these bent portions 43a and 44a, the sections 43 and 44 can be easily bent along these portions.

  The rod-like bodies 40 and 41 have a circular cross section in a direction orthogonal to the length direction, and are formed of an insulating material. The diameters of the rod-like bodies 40 and 41 are set to such an extent that the rod-like bodies 40 and 41 can be just inserted into the through holes 12 and 13 respectively provided at the front ends of the sandwiching portions 10a and 11a of the indirect construction sheet scissors 1.

The indirect sheet 2 of the present invention is assembled as follows using a conventionally known method. First, the insulating sheet 42 folded in two is sandwiched between the sandwiching portions 10a and 11a of the indirect construction sheet scissors 1 so that the crease 42a is on the operation portion side. At this time, the insulating sheet 42 is aligned with the sandwiching portions 10a and 11a as follows on the front end side of the sandwiching portions 10a and 11a.
(1) The bent portion 22 of the sandwiching portion 10a and the distal end portion of the sandwiching portion 11a are positioned between the inserted members 45 and 46 and the inserted members 47 and 48, respectively.
(2) The bent portions 43b and 44b of the sections 43 and 44 are positioned at the root position of the bent portion 22 with the sandwiching portion 10a and the end edge of the sandwiching portion 11a, respectively.

  Next, the rod-like body 40 is sequentially inserted into the opening 45a of the fitting member 45, the through hole 23 of the holding portion 10a, and the opening 46a of the locked member 46, and the rod-like body 41 is held between the opening 47a of the fitting member 47. The through hole 13 of the portion 11a and the opening 48a of the member 48 to be inserted are sequentially inserted. Thereby, the insulating sheet 42 has a fold 42a arranged on the back shaft 15 side in the space between the two sandwiching portions 10a and 11a of the sheet scissors 1 for the indirect method of the present invention, and the partition 43 on the tip side. 44, the bent portions 43b, 44b are arranged at predetermined positions, and the rod-like bodies 40, 41 are in close contact with the inner surface of the bent portion 22 and the distal end surface of the sandwiching portion 11a. It is fixed with. At this time, the tip regions 43a and 44a of the respective sections 43 and 44 have their widths (the length from the bent part to the side of the tip parallel thereto) protruding from the inner surface of the sandwiching part 10a of the bent part 22 It can be set slightly longer than the height and slightly protrude outside the indirect sheet 2.

  As described above, the sheet scissors for the indirect method of the present invention are not only used for temporarily fixing an insulating sheet, but also when a plurality of wires are sandwiched, the wires are not pulled out. It can also be suitably used for fixation. And even an unskilled worker can work in a short time, and work efficiency can be improved. Moreover, the sheet scissors for indirect methods of the present invention can be easily produced by partially improving conventional sheet scissors for indirect methods.

  In addition, since the indirect sheet of the present embodiment is provided with a bent portion or a protruding portion at the tip in this way without improving the clamping force, even when a plurality of wires are clamped with this, the wires may come out. Therefore, it is possible to safely protect the electric wire and to isolate it from the worker.

DESCRIPTION OF SYMBOLS 1 Indirect construction sheet scissors 10 1st clamping member 10a Clamping part 10b Operation part 10c, 10d, 10g, 11h Concave part 11 2nd clamping member 11a Clamping part 11b Operation part 11c, 11d, 11g, 11h Concave part 12, 13 , 23 Through holes 18, 19 Cushion material 20 Opening 22, 26 Bending part 28 Shaft 31 Bending part 32, 34 Through hole 33 Protruding piece 40, 41 Rod-like body 42 Insulating sheet 42 Fold 43, 44 Section 43 a, 44 a Section 43, 44 tip regions 43b, 44b Folded portions 45, 46, 47, 48 in sections 43, 44

Claims (6)

  The first clamping member and the second clamping member each having a clamping part and an operation part each having a concave part reaching both side edges can be rotated with respect to each other and urged in a direction in which the clamping part approaches each other. Indirect construction method sheet scissors that are pivotally supported, and the first holding member includes a bent portion or a protruding portion that protrudes toward a tip portion of the second holding member or a space near the tip portion. Sheet scissors for indirect methods characterized by   2. The indirect method sheet scissors according to claim 1, wherein the bent portion is rotatable via a shaft provided at a distal end portion of the first clamping member, or is configured to be detachable from the distal end portion. .   The indirect method sheet scissors according to claim 1, wherein the second holding member is formed with a concave groove that can receive and engage the protrusion at a tip portion thereof.   The concave portion of each of the holding portions is filled with a soft cushion material capable of holding a plurality of wires individually by being deformed, and configured to be able to hold a plurality of electric wires individually. Sheet of scissors for indirect method of any one of -3.   The recesses of each of the sandwiching portions have the same shape or similar shape, and a plurality of recesses are continuously arranged in the length direction of each of the sandwiching portions, and the plurality of electric wires can be sandwiched independently. 3. Sheet for scissors according to any one of 3 above.   The indirect sheet | seat characterized by consisting of the combination body of the sheet | seat for indirect methods of any one of Claims 1-4, and a soft insulating sheet.

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