JP2012060720A - Indirect hot-line grip tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indirect hot-line grip tool capable of gripping objects with various cross-section sizes with its gripping part.SOLUTION: In an indirect hot-line grip tool, an elastic member is provided at least to curved inner surfaces of its movable gripping piece and fixed gripping piece of a gripping part. When gripping an object by bringing the movable gripping piece closer to the fixed gripping piece, the elastic member intervenes between the mutually opposing curved inner surfaces of the gripping pieces and the gripped object, thus the gripped object can be supported and fixed. The elastic member further can be provided with covering parts to separately cover gripping surfaces of the gripping pieces. The elastic member can consist of the covering parts and a joint body part arranged in between to connect them, and also may be formed to fill and airtight the opening space made by the curved inner surfaces when bringing the gripping pieces closer together.

Description

  The present invention relates to an indirect hot wire gripping tool capable of gripping an object to be gripped having various cross-sectional sizes.

  FIG. 6 shows an example of the configuration of an insulating jacket (hereinafter simply referred to as a “tool”) as an example of an indirect hot wire gripping tool used in maintenance work for high-voltage overhead electric wires. The YATCO 30 is provided at the operation end 32 with an insulating operation rod 31 having a fixed grip piece 34, a movable grip piece 36 and a grip portion 33 having a pivot 38 at the distal end and having the proximal end as the operation end 32. It is mainly composed of an operation lever 40 and a connecting rod 39 that connects the operation lever 40 and the movable gripping piece 36 of the gripping portion 33. With this configuration, the operator holds the operation end 32 of the insulating operation rod 31 and operates the operation lever 40 (direction A in FIG. 6), so that the connecting rod 39 moves to the operation lever side (in FIG. 6). , B direction) The movable gripping piece 36 at the tip thereof approaches the fixed gripping piece 34 (C direction in FIG. 6), thereby gripping the object to be gripped between the gripping surfaces 34a, 36a of both gripping pieces. It can be done. However, in actual work, it is very difficult for an operator to grip an object to be gripped such as an electric wire between the gripping surfaces 34a and 36a at a position about 2 m away from the gripper 34a, 36a. There is a problem that is required.

  Moreover, this Yatco 30 may be used, for example, for tightening a terminal fitting lid in a primary bushing of a pole transformer. FIG. 7 is a diagram for explaining a primary bushing of a general pole transformer, where (a) is a side view showing its position in the pole transformer, and (b) is an enlarged cross-sectional side view ( The upper side of the drawing is a cross-sectional view from the one-dot chain line showing the bushing axis), and (c) shows a front view of the bushing. As shown in this figure, the primary bushing 43 (44) includes a main body 50 made of hard porcelain having metal fittings such as terminal fittings therein, and a high-voltage underline 45 (46) from a notch on the front end side of the main body 50. And a hard porcelain terminal fitting lid 51 for fastening and fixing the same. When a pole transformer is newly installed or replaced, it is necessary to rotate and tighten the terminal fitting lid 51 to connect the high voltage underline 45 (46) to the terminal fitting in the bushing. Further, in the PD clamp mounting operation in the indirect hot wire operation, it is necessary to tighten the terminal fitting lid 51 that has been confirmed to be loose during tightening while confirming the mounting state of the primary pushing and the high voltage underline.

  When using a Yatco for the fastening operation of the terminal fitting lid 51, as shown in FIG. 8, the terminal fitting lid 51 is gripped from the sides of the terminal fitting lid 51 between the holding surfaces 34a, 36a (see FIG. )), Or hold the terminal fitting lid 51 in the opening space O formed by the fixed holding piece 34 and the movable holding piece 36, or remove the terminal fitting lid 51 from the front front of the terminal fitting lid 51 as shown in FIG. It will be gripped with. However, since the fixed holding piece 34 and the movable holding piece 36 of the YATCO holding portion 33 are both made of aluminum alloy and the terminal fitting lid 51 is made of hard porcelain, the terminal fitting lid 51 is damaged when it is held. there is a possibility. When the terminal metal lid 51 is damaged, various adverse effects occur due to a decrease in insulation. Therefore, it is necessary to replace the terminal metal lid 51 and the entire primary bushing 43 (44).

  As described above, Yatco is used to grip objects to be gripped of various sizes, but there are some problems. The reason why a large object to be grasped has to be grasped by using a Yatsuko is that there is no tool suitable for grasping such an object.

JP 2009-50053 A JP 2008-42987 A

  The present invention has been made to solve the above-described problems, and an object thereof is to provide an indirect hot-line gripping tool that can grip an object to be gripped having various cross-sectional sizes at a gripping portion.

  According to the present invention, the object is to provide a movable gripping piece and a fixed gripping piece each having a gripping surface at the tip thereof, and an elasticity that is fixed to each gripping piece and arranged in an opening space formed by each gripping piece. And when the movable gripping piece is brought close to the fixed gripping piece to grip the object to be gripped, the elastic member is interposed between the curved inner surfaces facing each other and the object to be gripped. This is achieved by an indirect hot-line gripping tool characterized in that it includes a gripping part that intervenes and thereby grips the object to be gripped.

  The indirect live-line gripping tool of the present invention, when gripping the object to be gripped by this, between the mutually facing inner surfaces of the movable gripping piece and the fixed gripping piece in the gripping part of the indirect live-line gripping tool and the target gripping object. Since the elastic member is disposed in the opening space formed by the gripping pieces, the object to be gripped having different cross-sectional sizes can be securely gripped without being damaged, The workability at the time of grasping the grasped object is also improved.

It is a figure which shows an example of embodiment of the indirect hot wire holding | grip tool of this invention. It is a figure which shows the modification of embodiment of the indirect hot wire holding | grip tool shown in FIG. It is a figure which shows another example of embodiment of the indirect hot wire holding | grip tool of this invention. It is a figure which shows the modification of embodiment of the indirect hot wire holding | grip tool shown in FIG. It is a figure which shows the use condition of the indirect hot wire holding | grip tool of this invention. It is a figure which shows some specific examples of the covering fitting part of the front-end tool in this invention. It is a figure which shows an example of the conventional indirect hot wire holding tool. It is a figure for demonstrating the primary bushing of a general pole transformer. It is a figure which shows the example of the holding state of the terminal metal fitting cover of the pole transformer primary bushing shown in FIG. 8 using the conventional indirect hot wire holding tool. It is a figure which shows another example of the holding state of the terminal metal fitting lid of the pole transformer primary bushing shown in FIG. 8 using the conventional indirect hot wire holding tool.

  As described above, the indirect live-line gripping tool of the present invention has an elastic member disposed in the opening space formed by the fixed gripping piece and the movable gripping piece of the gripping portion, and each gripping object is gripped when gripping an object to be gripped. The elastic member is interposed between the piece and the object to be grasped. The elastic member only needs to be able to support the object to be gripped at least so as not to easily move in the opening space of the gripping part when the object to be gripped is gripped by the gripping part, and the form and fixing method are not limited. For example, the elastic member can be formed separately in two corresponding to each of the two gripping pieces, or integrally formed so as to circulate in the opening space without being separated in this way.

  In the former case, two elastic members can be formed in the same shape and size, and each can be fixed to the curved inner surface of each gripping piece. Moreover, you may form the coating | coated part which coat | covers the holding surface in the front-end | tip part of each said holding piece at the end of these two elastic members, respectively. This covering portion can also be fixed to the tip portion of each gripping piece by an appropriate method. Moreover, in the latter case, it can be formed by a covering portion that covers the gripping surface at the tip portion of each gripping piece, and a band-shaped connecting body portion that connects between them so as to go around in the opening space. In this case, the elastic member may be formed so as to close the opening space formed by these curved inner surfaces when the gripping pieces are brought close to each other. In this case, the elastic member is formed so that the covering portion is fitted to the tip portion of each gripping piece (hereinafter, the portion formed so as to be fitted in this way is particularly referred to as a “cover fitting portion”. ), And may be fixed by this, or may be fixed by a combination of this method and the above-described fixing method.

  Hereinafter, an embodiment of the indirect hot wire gripping tool of the present invention will be described in detail with reference to FIGS. In the present invention, since the elastic member provided in the gripping portion is characterized, only the gripping portion and the vicinity thereof are illustrated for the sake of simplicity. Further, the Yacco itself shown in each of these figures is not essentially different from that shown in FIG. That is, the gripping portion of the YATCO shown in FIGS. 1 to 5 and the movable gripping piece 3 each having a gripping surface 34a, 36a at the distal end and a curved inner surface 35, 37 at the proximal end and movable as described above. The gripping piece 36 includes a pivot 38 that pivotally supports the gripping pieces. The movable gripping piece 36 is movable toward and away from the fixed gripping piece by the movement of the connecting rod 39.

  FIG. 1 shows an example of an embodiment of an indirect hot wire gripping tool of the present invention in which two elastic members having the same shape and the same size are arranged. The elastic members 5 and 6 shown in this figure have a substantially semi-cylindrical shape when viewed from the front, and are configured such that the curved peripheral surfaces thereof are in close contact with the curved inner surfaces 35 and 37 of the fixed grip piece 34 and the movable grip piece 36, respectively. Yes. In addition, the thickness of the elastic members 5 and 6 is not particularly limited, and can be set, for example, approximately equal to the thickness of each gripping piece 34 or 36 or larger within a common sense range. The mutually opposing surfaces 5a and 6a of the elastic members 5 and 6 are substantially parallel to the gripping surfaces 34a and 36a of the gripping pieces 34 and 36, respectively, and protrude from the gripping surfaces 34a and 36a, respectively. The surfaces 5a and 6a may be appropriately roughened. In the present specification, the term “substantially semi-cylindrical” is used to include a semi-elliptical cylinder.

  The elastic members 5 and 6 in the present embodiment can be used without particular limitation as long as they exhibit elasticity such as rubber and synthetic resin. It is preferable that the elastic members 5 and 6 are further formed of an electrically nonconductive material. These elastic members 5 and 6 are fixed to the curved inner surfaces 35 and 37 of the two grip pieces 34 and 36 by a known method such as adhesion.

  In the example shown in FIG. 1, when the movable gripping piece 36 approaches the fixed gripping piece 34 around the axis of the pivot 38, first, the mutually opposing surfaces 5 a and 6 a come into contact with each other, By further approaching, the elastic members 5 and 6 are compressed to each other so that the opposing surfaces 5a and 6a are in close contact with each other, and the gripping surfaces 34a and 36a come into contact with each other. With such a configuration, not only the gripping surfaces 34a, 36a are gripped by the gripping surfaces, but also the elastic members 5 and 6 in the opening space O between the curved inner surfaces. It can be gripped.

  FIG. 2 shows a modification of the embodiment shown in FIG. The elastic members 7 and 8 in the example of this figure are the same shape and the same size as in the example shown in FIG. The gripping surfaces 34a and 36a are respectively provided with covering portions that can be covered, and are provided with covering fitting portions 7c and 8c that can be fitted to the tip portions. The thickness of the covering portion covering each of the gripping surfaces 34a and 36a can be appropriately set within a range of 1 to 10 mm, preferably 3 to 7 mm. The elastic members 7 and 8 are fixed to the gripping pieces 34 and 36 by fitting the covering fitting portions 7c and 8c into the tip portions of the gripping pieces 34 and 36. In this modification, the elastic members 7 and 8 are fixed. The back surfaces 7b and 8b may be tightly fixed to the curved inner surfaces 35 and 37 of the gripping pieces 34 and 36, respectively. As shown in FIG. 2, the mutually opposing surfaces 7a and 8a of the elastic members 7 and 8 are formed so as to be substantially flush with each other, and may be further subjected to a rough surface finish.

  In the modification shown in FIG. 2, when the movable gripping piece 36 approaches the fixed gripping piece 34 around the axis of the pivot 38, the opposing surfaces 7 a and 8 a of the elastic members 7 and 8 come into contact with each other. By further approaching, the elastic members 7 and 8 are compressed to bring the surfaces 7a and 8a into close contact. Elastic member FIG. 5A shows a state in which two electric wires W, W are gripped in this modification. As shown in this figure, the elastic members 7 and 8 are interposed at any position in the opening space O between the gripping surfaces 34a and 36a and between the curved inner surfaces because the surfaces 7a and 8a of the elastic members are in close contact with each other. The electric wires W can be gripped in the state.

  FIG. 3 shows another example of the embodiment of the gripping portion in the indirect hot-line gripping tool of the present invention. The elastic member 9 shown in this figure is fitted to the tip portions of the gripping pieces 34 and 36, respectively, and the covering fitting portions 16 and 17 formed so as to be able to cover these gripping surfaces 34a and 36a, and these It is composed of a belt-like connecting body portion 15 which is formed and extended so as to draw a substantially U shape in the opening space O from both base end sides. The covering thickness of the gripping surfaces 34a and 36a by the covering fitting portions 16 and 17 can be appropriately set within a range of 1 to 10 mm, preferably 3 to 7 mm, as in the embodiment of FIG. In the case of the elastic member 9 shown in FIG. 3, the covering fitting portions 16 and 17 can be detachably fixed by being fitted into the tip portions of the two gripping pieces 34 and 36. The elastic member 9 having such a configuration is particularly suitable for holding a large object to be grasped such as a terminal fitting lid 51 of a primary bushing of a pole transformer as shown in FIG. .

  FIG. 5B shows a state in which the terminal fitting lid 51 of the primary bushing as shown in FIG. 7 is gripped using the grip portion 3 of the embodiment shown in FIG. As shown in this figure, the connecting body portion 15 of the elastic member 9 is interposed in the opening space O between the terminal fitting lid 51 as the object to be gripped and the curved inner surfaces 35 and 37 of the two gripping pieces 3 and 36. As a result, the terminal fitting lid 51 made of porcelain can be securely tightened without damaging it. Although not shown, even when the terminal fitting lid 51 is gripped from the outside in the axial direction using the grip portion 3, the two gripping surfaces 34a and 36a are respectively covered with the covering fitting portions of the elastic member 9. Since 16 and 17 cover this, it is possible to securely perform the tightening without damaging the terminal fitting lid 51 in the same manner.

  FIG. 4 shows a modification of the elastic member 9 shown in FIG. In the elastic member 10 shown in this figure, the connecting body portion includes thick portions 18 and 20 that face the curved inner surfaces 35 and 37 of the gripping pieces 34 and 36, respectively, and a thin portion 19 in the vicinity of the pivot 38. It has been configured. By providing the thin portion 19, the elastic member 10 bends flexibly following the movement of the movable 36. Other configurations are essentially the same as the embodiment shown in FIG. Even with such a configuration, an object to be grasped having a cross-sectional size substantially equal to that of the terminal fitting lid 51 can be reliably grasped, and even if the object to be grasped may be damaged, it can be grasped without being damaged.

  In addition, in the elastic member in the example shown in FIGS. 2-4, although the coating | coated fitting part is formed only with an elastic member, it is not limited to this, It can also be set as a structure as shown in FIG. FIGS. 5A and 5B show two configuration examples of a tip tool composed of a pair of covering fitting portions and elastic members provided at both ends, taking the elastic member 9 shown in FIG. 3 as an example. The covering fitting portions forming a pair in any configuration example are mirror images of each other. In FIG. 5B, since the connection body portion 15 of the elastic member 9 shown in FIG. 5A is essentially the same, the connection body portion 15 is not shown. 5 (a) and 5 (b) both illustrate a pair of jigs, but in the following, one covering fitting portion of the pair will be basically described, and the other will be described. The reference numerals of the respective parts are only shown in parentheses, and the description is omitted in particular.

  The covering fitting portion 60 (61) shown in FIG. 5A is erected substantially vertically from the member 621 (651) and its both ends (both ends in the left and right directions as viewed in the drawing). A substantially U-shaped main body 62 (65) provided with two members 622, 623 (652, 653) facing each other so as to sandwich the tip portion from the thickness direction, and a belt-like elastic member 9 Has been. In the main body 62 (65), not only the members 622 and 623 (652 and 653) but also members (not shown) that sandwich the distal end portions of the gripping pieces 34 and 36 from the side may be provided. it can. A screw hole 625 (655) is provided in the central region of the member 622 (652), and a screw threaded portion 624 (654) is provided so as to extend the screw hole 625 (655) to the outside of the member 622 (652). Is provided. A screw 626 (656) is screwed into the screw screw portion 624 (654). Further, the belt-like elastic member 9 has both longitudinal ends 16a (17a) fixed to the outside of the member 623 (653). The method for fixing the elastic member 9 to the member 623 (653) is not particularly limited, and various conventionally known methods can be employed. Bolts 626 and 656 having appropriate lengths are screwed into the screw threaded portions 624 (654), respectively, and the tip ends of the bolts 626 (656) protrude inside the member 622 (652).

  The elastic member 9 shown in this example is configured such that the covering fitting portions 60 and 61 are fitted into the tip portions of the two gripping pieces 34 and 36 of the gripping portion 3 and screws 626 and 656 are screwed in, respectively. It can fix to the tip part of 36, respectively. Further, by loosening the screws 626 and 656 on the contrary, the covering fitting portions 60 and 61 can be easily detached from the gripping pieces 34 and 36. An elastic member provided with a pair of covering fitting portions having such a configuration at a predetermined position can be suitably used as a tip tool 58 of an indirect live wire gripping tool such as a Yatsuko.

  Next, the covering fitting portion 68 (69) shown in FIG. 5 (b) is also erected substantially vertically from the member 701 (771) and both ends thereof in the same manner as the example shown in FIG. 5 (a). A substantially U-shaped main body portion 70 (77) including two members 702 and 703 (772, 773) facing each other so as to sandwich one gripping piece, and a belt-like elastic member 9 are provided. The main body 70 (77) may be provided with not-shown members that sandwich not only the members 702 and 703 (772 and 773) but also the gripping pieces 34 and 36 from the side. it can. A through hole 705 (775) penetrating in the thickness direction is formed in the central region of the member 702 (772), and the engaging pin pushing mechanism portion 724 (774) has its axis line at the center of the through hole 705 (775). Are extended to the outside of the member 702 (772). The engagement pin pushing mechanism 724 (774) is urged by a spring 75 (82) as urging means, and is engaged so that the tip 73a (80a) projects into the space inside the member 702 (772). The pin 73 (80) is configured to be pushed out along its axis. In order to make the movement direction of the engagement pin 73 (80) constant, the tip end of the guide protrusion 74 (81) enters a concave groove provided on the inner wall of the member 704 in parallel with the movement direction, Is supposed to move. Further, a knob 76 (83) is provided at the end of the pin 73 (80) opposite to the tip 73a (80a), and the operator resists the biasing force of the spring 75 (82). By pulling out toward the outside of the jig 70 (77), the tip 73a (80a) of the engagement pin 73 (80) can be immersed in the member 702 (772).

  In the case of the elastic member 9 shown in FIG. 5 (b), it is covered and fitted to the tip portions of the two holding pieces 34 and 36 of the holding part 3 with the knob 76 (83) of the covering and fitting parts 70 and 77 pulled out. After engaging the portions 70 and 77, the engaging pin 73 (80) can be fixed to the tip portions of the gripping pieces 34 and 36 by releasing the knob 76 (83). Then, by pulling out the knob 76 (83), the covering fitting portions 70 and 77 can be easily detached from the gripping pieces 34 and 36. An elastic member provided with a pair of covering fitting portions having such a configuration at a predetermined position can be suitably used as a tip tool 59 of an indirect live wire gripping tool such as a Yatsuko.

  As described above with respect to some embodiments, the indirect hot-line gripping tool of the present invention has an elastic member disposed between a fixed gripping piece and a movable gripping piece, and the gripped object is gripped when gripping an object to be gripped. Since the elastic member is interposed between the object and the curved inner surface or the holding surface of these two holding pieces, the object to be held having various cross-sectional sizes can be reliably held. The present invention is not limited to the embodiments shown in the accompanying drawings. In addition, since the elastic member in the present invention can be configured as a tip tool for an indirect live wire gripping tool as described above, it can be detachably mounted on a gripping part such as an existing Yatco and gripped in various sizes. There is no need to newly prepare a dedicated gripping tool for gripping an object.

1-4 Grasping parts 5-10 Elastic members 5a, 6a, 7a, 8a Elastic member inner faces 10a, 11a Elastic member inner faces 15 Coupling parts 16, 17 Cover fitting parts 16a, 17a Cover fitting part inner faces 18, 20 Elastic member Thick portion 19 Thin portion 34 of elastic member Fixed gripping pieces 34a, 36a Holding surfaces 35, 37 Curved inner surface 36 Movable gripping piece O Open space W Electric wire 51 Terminal fitting lid 58, 59 Tip tool 60, 61, 68, 69 Covering Fitting portions 62, 65, 70, 77 Substantially U-shaped main body portions 621-623, 651-653 members 624, 654 screw screwing portions 625, 655 screw holes 626, 656 screws 701-703, 771-773 members 704, 774 Engagement pin push-in mechanism 705, 775 Through hole 73, 80 Engagement pin 73a, 80a Engagement pin tip 74, 81 Guide protrusion 75, 82 Energizing means (Spring)
76, 83 knob

Claims (6)

  A movable gripping piece and a fixed gripping piece each having a gripping surface at the tip thereof, and an elastic member fixed to each gripping piece and disposed in an opening space formed by each gripping piece. When gripping an object to be gripped by approaching the fixed gripping piece, the elastic member is interposed between the curved inner surfaces of the gripping pieces facing each other and the object to be gripped. An indirect live-line gripping tool comprising a gripping part that is supported and fixed.   The indirect live-line gripping tool according to claim 1, wherein the elastic member further includes a covering portion that covers the gripping surfaces of the movable gripping piece and the fixed gripping piece.   The indirect live-line gripping tool according to claim 1 or 2, wherein the elastic member includes each of the covering portions and a belt-like connecting body portion that connects the covering portions.   4. The indirect hot wire according to claim 2, wherein each of the covering portions constitutes a part of a covering fitting portion that can be detachably fitted to tip portions of the movable holding piece and the fixed holding piece. Gripping tool   The said elastic member has a form which obstruct | occludes the opening space formed by the curved inner surface of each said holding piece, when each said holding surface or each said coating | coated part is made to contact. The indirect hot wire gripping tool according to claim 1.   A tip tool that can be attached to an indirect live-line gripping tool having a movable gripping piece and a fixed gripping piece, each covering a gripping surface provided at the tip of each gripping piece and formed by a curved inner surface of each gripping piece An elastic member disposed in the open space, and a covering fitting portion that is fixed to the elastic member and that can be removably fitted to a tip portion including a holding surface in each holding piece. Tip tool.

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