JP2012130105A - Cotter structure of wedge anchor clamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cotter structure of wedge anchor clamp capable of obtaining accurate wiring sag with enhanced workability.SOLUTION: A cotter structure of wedge anchor clamp includes: a wedge anchoring clamp main body 10: a coupling plate 12; a cotter member 20; a cable-tensioning link 80; a guide bolt 30; a fixed bolt 40; a cotter bolt 50; a cotter nut 52; and a self-lock pin. A first coupling plate 12-1 includes a guide bolt hole 12c and a cotter bolt hole 12a, while a second coupling plate 12-2 includes a guide bolt hole and a cotter bolt hole similarly, and a fixed bolt hole 20b therebetween. A cotter member 20 includes: a guide bolt screw hole 20c at the position of the guide bolt hole 12c; a fixed bolt screw hole 20b at the position of the fixed bolt hole 12b; a cotter bolt hole 20a at the position of the cotter bolt hole 12a therebetween; and an insulator anchoring hole 20e.

Description

  The present invention relates to a wedge-type retention clamp for pulling an overhead power transmission line to a steel tower, and more particularly to a cotter structure for a wedge-type retention clamp that has good workability and provides an accurate overhead wire sag.

  Conventionally, a wedge-type retention clamp has an overhead power transmission line held inside a clamp body that opens and closes with a pair of C-shaped cross-section facing pieces hinged when the overhead power transmission line is tightened. A pair of wedges are press-fitted into the upper and lower gaps between the overhead power transmission line and fixed to each other, and a pair of connecting plates that are rotatably supported on both sides of the clamp body are provided. A structure in which an overhead power transmission line is fastened to a support by connecting to an insulator locked to the support is well known (for example, see Patent Documents 1 and 2 below).

  A conventional wedge-type retaining clamp having the above-described structure will be described with reference to FIGS. 4 and 5. FIG. FIG. 4 is an external perspective view showing an embodiment of a conventional wedge-type retention clamp. Moreover, FIG. 5 is a figure which shows the state in the middle of retaining an overhead power transmission line to a support using the wedge type | mold retention clamp shown in FIG.

  As shown in FIG. 4, in the embodiment of the conventional wedge-type retention clamp, the overhead power transmission line 1 is opened and closed by connecting a pair of C-shaped cross-section facing pieces 2a with a hinge 2b when the overhead power transmission line 1 is tightened. A pair of wedges 4 that can be press-fitted into a vertical gap between the clamp body 2 and the overhead power transmission line 1 held by the clamp body 2 and the hinge of the clamp body 2. And a pair of connecting plates 3 each having one end rotatably supported on both sides and extending to the other end of the support 5 such as a steel tower (see FIG. 5).

  As shown in FIG. 5, first, an insulator extending from a support (not shown) is used to attach the overhead power transmission line 1 to the support using such a conventional wedge-type retention clamp. 5 is connected to one end side of the stringing tool 6, and the other end side of the stringing tool 6 is gripped by the overhead power transmission line 1 and pulled to the insulator 5 side. Give stringiness. As a result, the clamp body 2 can be attached to the overhead power transmission line 1.

  At this time, as shown in FIG. 5, the stringing tool 6 includes a kamalong 6c that grips the overhead power transmission line 1 that is pulled toward the insulator 5, a stringing wire 6a that is connected to the kamalong 6c and draws it, and this stringing It consists of a gold wheel 6b that supports the wire 6a, and one end side of the gold wheel 6b is connected to the aforementioned insulator 5. The wire tying tool 6 has a well-known structure well known in the art (for example, see FIG. 6 of Patent Document 2).

  Then, the overhead power transmission line 1 is pulled and maintained at a desired stringiness by the tight line tool 6, and the overhead power transmission line 1 not receiving the tensile force extending backward from the kamalong 6 c (grip point) shown in FIG. After the pair of wedges (two wedges) 4 are mounted, the wedge 4 is pushed in and attached to the position of the clamp body 2 indicated by the dotted line in FIG. Finally, the free ends of the pair of connecting plates 3 of the clamp body 2 are attached to the end portions of the insulator 5, and the tight wire 6a, the gold wheel 6b, and the tight tool 6 of the kamalong 6c are respectively removed, thereby forming a wedge shape. The overhead power transmission line 1 can be retained on the support through the insulator 5 by the retaining clamp.

JP 2000-261194 A JP-A-6-335145

  However, as shown in FIG. 5, the conventional wedge-type retention clamp has a clamp body connected to the overhead transmission line 1 in the tightly connected state connected to the insulator 5 via the tight wire 6a from the kamalong 6c of the tight tool 6. When the wedge tool 4 is attached to the overhead power transmission line 1 that is not subjected to the tensile force behind the kamalong 6c, and the clamp body 2 is attached alone, so that the tightening tool 6 is removed. The degree to which the wedge 4 (aluminum material) is press-fitted into the clamp body 2 cannot be predicted, and the overhead power transmission line 1 does not have the desired stringiness, resulting in variations in the positions of the wires and strings. was there.

  When such a variation in stringiness occurs, an operator at a height of a support such as a steel tower removes the wedge 4 press-fitted into the clamp body 2 again, and attaches the stringing tool 6 from the beginning again. There is a problem that it takes time to complete the mounting work because it is necessary to perform the mounting work of the die retaining clamp.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a cotter structure of a wedge-type retaining clamp that has good workability and can obtain an accurate overhead wire slackness.

  A cotter structure for a wedge-type retention clamp according to the present invention is a cotter structure for a wedge-type retention clamp for pulling an overhead power transmission line to a steel tower. The wedge-type retention clamp includes a wedge-type retention clamp body, first and first 2 linking plates, cotter members, tight links, guide bolts, fixing bolts, cotter bolts, cotter nuts, and self-locking pins. The first linking plate has guide bolt holes and cotter bolt holes. The second connecting plate has a similar guide bolt hole and cotter bolt hole, and a fixing bolt hole between the guide bolt hole and the cotter bolt hole, and the cotter member has a position of the guide bolt hole. A guide bolt screw hole, a fixing bolt screw hole at the position of the fixing bolt hole, a similar cotter bolt hole at the position of the cotter bolt hole, and an insulator retaining hole, and a guide for the first connecting plate A guide bolt is inserted into the bolt hole and screwed into a guide bolt screw hole of the cotter member, the cotter member is fixed to the first connecting plate, a fixing bolt is inserted into the fixing bolt hole of the second connecting plate, and By being screwed into the fixing bolt screw hole of the cotter member, the guide bolt hole of the second connecting plate is guided to the tapered portion at the tip of the guide bolt, and is aligned and fixed with the guide bolt positioned in a predetermined manner. A cotter bolt is inserted into a cotter bolt hole between the first and second connecting plates and the cotter member, a cotter nut is attached to the cotter bolt, and a self-locking pin is attached to the cotter bolt. To do.

  According to the present invention, it is possible to provide a cotter structure of a wedge-type retention clamp that has good workability and can obtain an accurate overhead wire sag.

The block diagram of the wedge type | mold retention clamp which comprises the cotter structure by this invention. The cotter structure figure of the wedge type | mold retention clamp by this invention. The construction drawing of the cotter structure by this invention. The external appearance perspective view of the embodiment of the conventional wedge type retention clamp. Fig. 6 is a drawing for retaining a conventional wedge-type retention clamp.

  FIG. 1 is a configuration diagram of a wedge-type retention clamp having a cotter structure according to the present invention. In FIG. 1, a wedge-type retention clamp 100 having a cotter structure according to the present invention has a pair of C-shaped cross-sections facing each other when the overhead power transmission line 1 (see FIG. 5) is tightened, as in the prior art shown in FIG. The clamp body 10 that holds the overhead power transmission line 1 inside the hinge 10b that is connected to the hinge 10b, and the upper and lower gaps between the clamp body 10 and the overhead power transmission line 1 held by the clamp body 10 are press-fitted to both. A pair of wedges 4 that can be fixed and both ends of the clamp body 10 centered on the hinge 10b are rotatably supported at one end, and the other end is locked to an insulator 5 such as a steel tower. A pair of connecting plates 12.

  Also, unlike the prior art shown in FIG. 4, the wedge-type retention clamp 100 is provided with one connecting plate 12 by means of a lever retaining hole 20 e that is locked to a lever 5 of a support (see FIG. 5) and a guide bolt 30. Guide bolt screw hole 20c fixed to -1, a fixing bolt screw hole 20b for guiding the guide bolt hole 12c of the other connecting plate 12-2 to the tapered portion of the guide bolt 30 by the fixing bolt 40, and a cotter bolt 50 And a cotter bolt hole 20a for fixing the cotter nut 52 with a self-locking pin (not shown). Further, the lever 5 is connected to a kamalong 6c (refer to FIG. 5) of a tightening tool 6 that is attached to the tip side surface of the clamp body 10 in a direction opposite to the direction of the connecting plate 12 to be locked to the lever 5, and pulls the overhead power transmission line 1. And a tight link 80 for attaching the clamp body 10 between the power transmission line 1 and the overhead power transmission line 1.

  That is, the present invention has a cotter member 20 at one end on the side of the connecting plate 12 and a tight link 80 at the tip side of the clamp body 10 at the other end with respect to the conventional wedge-type tension clamp shown in FIG. By having it, the cotter member 20 is attached to the insulator 5 of the support, and the tight link 80 is attached to the tight tool 6 for pulling the overhead power transmission line 1 so that the clamp body 10 can be supported in a constant tight state. This is the structure.

  Here, the clamp body 10 has a pair of C-shaped cross-section facing pieces 10a that are vertically divided so as to face each other, and a support shaft (shown in FIG. 1) on either the upper side or the lower side that the pair of C-shaped cross-section facing pieces 10a touch. It is configured to be openable and closable by providing a hinge 10b that is pivotally supported through (not shown). The clamp body 10 is opened in a state where a pair of opening and closing C-shaped cross-section facing pieces 10a are overlapped, and the overhead power transmission line 1 is inserted into the hollow portion of the clamp body 10 to be closed again. The overhead power transmission line 1 is fixed by sandwiching and pushing the pair of wedges 4 (see FIG. 4). The clamp body 10 includes a pair of connecting plates 12 that are pivotally supported by bolts (not shown) or the like so as to be swingable on both outer sides that are opened and closed by a hinge 10b.

  One end of each of the pair of connecting plates 12 is pivotally supported on both outer sides of the clamp body 10, and the other end extending in parallel from the both side surfaces is bent so as to overlap each other, and the cotter bolt 50 is penetrated by the cotter bolt 50. It has a hole 12a. Further, unlike the prior art shown in FIG. 4, the pair of connecting plates 12 has a guide bolt hole 12c through which the guide bolt 30 having the tapered portion 35 passes and a cotter bolt hole 12a through which the cotter bolt passes. The plate 12-2 has a fixing bolt hole 12b through which the fixing bolt passes.

  FIG. 2 is a cotter structure diagram of a wedge type retention clamp according to the present invention. In FIG. 2, when the cotter member 20 of the cotter structure 200 of the present invention is connected to the insulator 5 of the support and pulled, a tensile force is applied to the guide bolt 30 having the tapered portion 35, and a pair of the cotter member 20 is interposed therebetween. The connecting plate 12 is provided so that a tensile force is evenly applied thereto. For this reason, after the clamp body 10 is opened and the overhead power transmission line 1 is passed, the guide bolt hole 12c of the connecting plate 12-2 on the side where the clamp body 10 is opened is guided by the fixing bolt 40, and the guide bolt 30 The clamp body 10 is closed by reaching the predetermined position, and the connecting plate 12-2 is fixed to the cotter member 20 by the fixing bolt 40, thereby forming a cotter structure.

  The guide bolt 30 provided with the taper portion 35 serves to position the connecting plate 12 and the cotter member 20 so as not to be displaced. That is, for example, by fixing the connecting plate 12-1 and the cotter member 20 with the guide bolt 30, the connecting plate 12-2 side can be freely opened even if the cotter member 20 is pulled by the insulator 5. After opening and closing the clamp body 10 shown in FIG. 1 and inserting the overhead power transmission line 1 into the interior, the connecting plate 12-2 is positioned by the fixing bolt 40 and fixed to the cotter member 20, and the connecting plate 12 is equally insulator. The structure is pulled by 5. Next, the formation of the cotter structure will be described in detail.

  FIG. 3 is a construction diagram of the cotter structure according to the present invention. A construction method for retaining the overhead power transmission line 1 to the insulator 5 of a support such as a steel tower using the wedge-type retention clamp 100 shown in FIG. 1 having the cotter structure 200 of the present invention in FIG. A specific description will be given with reference to FIG. First, in the state in which the wedge-type retaining clamp 100 shown in FIG. 1 is assembled, the insulator shown in FIG. 5 is inserted into the insulator retaining hole 20e of the cotter member 20 fixed to the connecting plate 12-1 of the clamp body 10 by the guide bolt 30. 5 is installed. After that, the money wheel 6b of the wire tightening tool 6 that holds and pulls the overhead power transmission line 1 shown in FIG. 5 is connected to the money wheel retaining hole 80b (see FIG. 1) of the wire link 80 of the clamp body 10. Thus, the clamp body 10 is attached so as to be in a state of maintaining a constant tight connection state between the support 2 and the overhead power transmission line 1.

  In this way, the wedge-type retention clamp 100 is mounted in a pulled state between the insulator 5 and the tightening tool 6 that pulls the overhead power transmission line 1, so that the conventional technique shown in FIG. 5 is used. The overhead power transmission line 1 held by the wedge 4 can be inserted into the clamp body 10 in a state in which a constant tight line state is maintained without attaching the clamp body 2 alone to the overhead power transmission line 1. That is, the clamp body 10 on the side of the connecting plate 12-2 which is not fixed is opened around the hinge 10b, and the overhead power transmission line 1 pulled by the wire tightening tool 6 is inserted into the clamp body 10 and closed again. The power transmission line 1 can be inserted.

  In this closing step, the positions of the holes of the connection plate 12-2 that is not fixed and the connection plate 12-1 that is kept in a tight line state are displaced from each other. For this reason, the fixing bolt 40 is passed through the fixing bolt hole 12b of the connecting plate 12-2 and is screwed into the fixing bolt screw hole 20 of the cotter member 20. At this time, the guide bolt hole 12c of the connecting plate 12-2 is guided to the taper portion 35 at the tip of the guide bolt 30, and is fixed in a state where it is accurately aligned with the guide bolt 30 that is finally positioned at a predetermined position. It is fixed with bolts 40. Thereafter, the cotter bolt 50 is inserted into the cotter bolt hole 12a, the cotter nut 52 is attached to the cotter bolt 50, the self-locking pin is inserted into the self-locking pin hole 51, and the clamp body 10 is completely closed. By using the cotter bolt 50 together, the overhead power transmission line 1 can be suspended more safely.

  When the overhead power transmission line 1 is inserted into the clamp body 10 in this manner, the tight wire 6a is pulled to check whether the overhead power transmission line 1 is maintained at a desired stringiness, and the mounting position of the wedge 5 is determined. Mark to indicate. Thereafter, the overhead power transmission line 1 can be completely fixed by pulling the overhead power transmission line 1 to attach the wedge 4 to the mounting position of the wedge 5, loosen the overhead power transmission line 1 again, and insert the wedge 4 into the clamp body 10.

  That is, by pushing the wedge 20 into the clamp body 10, the overhead power transmission line 1 is attached to the clamp body 10. At this time, the overhead power transmission line 1 is attached to a desired stringiness by a mark indicating the mounting position. In addition, variations in the position of the overhead power transmission line 1 and variations in stringiness are reliably prevented. Further, this construction method is a work performed by an operator climbing on a high support such as a steel tower, and the work can be performed in a state where the clamp body 10 is kept in a certain tight line state in advance, so that the conventional method shown in FIG. It can be seen that workability is significantly improved compared to technology.

  As described above, according to the present invention, there is provided a cotter structure for a wedge-type retention clamp that has good workability, provides an accurate overhead wire slackness, and prevents variations in the position of the overhead power transmission line 1 and stringiness. Can be provided.

DESCRIPTION OF SYMBOLS 1 Overhead electric wire 4 Wedge 5 Insulator 6 Tightening tool 6a Tightening wire 6b Metal wheel 6c Camalong 10 Clamp body 10a Cross-section opposing piece 10b Hinge 12-1.2 Connecting plate 12a Cotter bolt hole 12b Fixing bolt hole 12c Guide bolt hole 20 Cotter Member 20a Cotter bolt hole 20b Fixing bolt screw hole 20c Guide bolt screw hole 20e Insulator retaining hole 30 Guide bolt 35 Taper part 40 Fixing bolt 50 Cotter bolt 51 Self-locking pin hole 52 Cotter nut 80 Tight link 80a Tight link link mounting hole 80b Gold Vehicle retaining hole 100 Wedge-type retention clamp having the cotter structure according to the present invention 200 The cotter structure according to the present invention

Claims (1)

A cotter structure of a wedge type retention clamp for towing an overhead power transmission line to a steel tower,
The wedge-type retention clamp includes a wedge-type retention clamp body, first and second connecting plates, a cotter member, a tight link, a guide bolt, a fixing bolt, a cotter bolt, a cotter nut, and a self-lock. With pins,
The first connecting plate has a guide bolt hole and a cotter bolt hole,
The second connecting plate has a similar guide bolt hole and cotter bolt hole, and a fixing bolt hole between the guide bolt hole and the cotter bolt hole,
The cotter member has a guide bolt screw hole at the position of the guide bolt hole, a fixing bolt screw hole at the position of the fixing bolt hole, a similar cotter bolt hole at the position of the cotter bolt hole, and an insulator retaining hole. And
The guide bolt is inserted into the guide bolt hole of the first connecting plate and screwed into the guide bolt screw hole of the cotter member, and the cotter member is fixed to the first connecting plate,
When the fixing bolt is inserted into the fixing bolt hole of the second connecting plate and screwed into the fixing bolt screw hole of the cotter member, the guide bolt hole of the second connecting plate becomes the guide bolt hole. Guided to the tapered portion at the tip, aligned and fixed with a guide bolt positioned in a predetermined manner,
The cotter bolt is inserted into the cotter bolt hole of the first and second connecting plates and the cotter member, the cotter nut is attached to the cotter bolt, and a self-locking pin is attached to the cotter bolt. A wedge-type retention clamp cotter structure characterized by being formed.

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