JP2013115902A - Wedge removing device for wedge-shaped anchor clamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wedge removing device for a wedge-shaped anchor clamp that can easily remove a wedge of an anchor clamp by simple wedge removing plates.SOLUTION: A wedge removing device for a wedge-shaped anchor clamp includes: a pair of wedge removing plates 10; a screw block 20 for attaching thereto the pair of wedge removing plates 10; and a removing force applying screw 30 that is screwed into the screw block 20 and applies a removing force to remove a wedge to the pair of wedge removing plates 10. The screw block includes: a pair of wedge removing plate attachment screws 24 for attaching the pair of wedge removing plates 10; and a removing force applying screw hole 22 configured to accept the removing force applying screw 30. The pair of wedge removing plates 10 respectively include a plurality of attachment screw through holes 13. Additionally, a lower surface 11 of each of the pair of wedge removing plates is longer than an upper surface 12 thereof, and a part 14 of both side surfaces of the pair of wedge removing plates has an inclined surface that widens toward the lower surface 11.

Description

  The present invention relates to an extraction wedge device for extracting a wedge of a wedge-shaped retention clamp for pulling an overhead power transmission line to a steel tower, and more particularly, a wedge-type retention clamp capable of easily extracting a wedge of the retention clamp with a simple extraction wedge plate. The present invention relates to a wedge removal apparatus.

  Conventionally, when the wedge of the wedge-shaped retention clamp is pulled out, it has been performed by using a pushing machine composed of a hydraulic cylinder used when the wedge is inserted into the clamp body. FIG. 8 is an explanatory view for extracting a wedge by a conventional wedge-type retaining clamp pusher. In FIG. 8, the hooking tab 410 of the pusher 400 is inserted into the gap of the clamp attachment plate 210 of the MAT type clamp main body 200 from the direction of the arrow, and the wedge 300 is pushed out from the opposite side at the time of insertion to remove the wedge 300. It was.

  In this method, a special spacer is inserted between the hydraulic cylinder of the pusher 400 and the wedge 300, and the wedge 300 is pulled out by hydraulic pressure. Therefore, the pusher 400 having a weight of about 15 kg needs to be hung from the power transmission tower. Since the hydraulic pump unit (not shown) is also installed and operated at a location away from the clamp body 200, a high level of skill and experience is required to work safely and stably. Similarly, in the case of the MBT type clamp, a pushing machine having a weight of 10 kg was used.

  In Patent Document 1, there are a block that is detachably attached to a pair of straps provided on both sides of the clamp body, and a block in which the axial direction of the drive shaft coincides with the axial direction of the wedge body that grips the electric wire. The hydraulic cylinder is provided, and one end is provided at the tip of the drive shaft of the hydraulic cylinder, the other end is in contact with a wedge body that grips the electric wire, and a pressing portion having a groove into which the electric wire is inserted. Is described.

JP-A-6-189433

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a wedge-type retaining clamp extraction device that can easily extract a retention clamp wedge with a simple extraction wedge plate. .

  The wedge-shaped retaining clamp extracting device according to the present invention is a wedge-extracting device for extracting a wedge-shaped retaining clamp for pulling an overhead power transmission line to a steel tower, and attaches a pair of extracted wedge plates and a pair of extracted wedge plates. A screw block and a pulling force application screw that is screwed into the screw block and applies a pulling force for pulling out the wedge to the pair of pulling wedge plates. The screw block has a pair of pulling wedge plates on both sides. It has a pair of extraction wedge plate mounting screws and its nuts to be attached, and has a through-hole extraction force application screw hole through which a extraction force application screw is screwed in the center. The wedge plate has a plurality of attachment screw through-holes to which the extraction wedge plate mounting screw is inserted and fixed by a nut, and the lateral width of the lower surface of the pair of extraction wedge plates is longer than the lateral width of the upper surface. , The pre Some of the sides of the bets is characterized by having an inclined surface extending toward the bottom surface.

  The lateral length of the inner side surface of the pair of extraction wedge plates formed by attaching the pair of extraction wedge plates to the screw block of the extraction device for the wedge-shaped retention clamp of the present invention is longer than the lateral length of the outer side surface, In addition, the upper surface and the lower surface have a trapezoidal shape, the tip of the extraction force application screw has a protrusion, and the extraction wedge plate mounting screw of the screw block includes two pairs.

  The wedge-shaped retaining clamp extracting device according to the present invention is a wedge-extracting device for extracting a wedge-shaped retaining clamp for pulling an overhead power transmission line to a steel tower, and attaches a pair of extracted wedge plates and a pair of extracted wedge plates. A screw block, a pulling force application screw that is screwed into the screw block and applies a pulling force for pulling out the wedge to the pair of pulling wedge plates, and a pair of adapters that hold the pair of pulling wedge plates. The block has a pair of extraction wedge plate mounting arms and a pair of extraction wedge plate stoppers for attaching a pair of extraction wedge plates to both sides, and a extraction force application screw is screwed into the center. The pair of extraction wedge plates has a square hole into which the extraction wedge plate mounting arm is inserted, and the lateral width of the lower surface of the pair of extraction wedge plates is the upper surface. Longer than the width of the Some of the both side surfaces of the rate has an inclined surface extending toward the lower surface, the pair of adapter, and having a 抜楔 plate gripping grooves for gripping the pair of 抜楔 plates.

  The lateral length of the inner side surface of the pair of extraction wedge plates formed by attaching the pair of extraction wedge plates to the screw block of the extraction device for the wedge-shaped retention clamp of the present invention is longer than the lateral length of the outer side surface, In addition, the shape of the upper surface and the lower surface is a trapezoid, the upper surface of the square hole has a plurality of angled grooves, and the wedge plate mounting arm of the screw block has a square shape inserted into the square hole. The top surface of the square shape has a groove similar to the plurality of mountain-shaped grooves, the tip of the extraction force application screw has a protrusion, and the extraction plate holding groove of the pair of adapters includes: It has a C-shaped gripping groove that is open on the inner side surface of the pulling wedge plate to be gripped, and both side surfaces of the pair of adapters have rectangular side surfaces that are not inclined in the thickness direction.

  ADVANTAGE OF THE INVENTION According to this invention, the wedge extraction apparatus of the wedge type | mold retention clamp which can extract the wedge of a retention clamp stably and easily with a simple and lightweight extraction wedge plate can be provided.

The block diagram of the extraction wedge apparatus of the wedge-shaped retention clamp by 1st Example of this invention. FIG. 3 is a detailed view of the structural elements of the wedge pulling device of the wedge-shaped retention clamp according to the first embodiment of the present invention. The wedge drawing by the wedge extraction apparatus of the wedge-shaped retention clamp of 1st Example of this invention. The block diagram of the extraction wedge apparatus of the wedge-shaped retention clamp by 2nd Example of this invention. The connection structure figure of the screw block and extraction wedge plate by 2nd Example of this invention. FIG. 6 is a structural diagram of an adapter according to a second embodiment of the present invention. The wedge drawing by the wedge extraction apparatus of the wedge-shaped retention clamp of 2nd Example of this invention. FIG. 3 is a drawing of a wedge extracted by a conventional wedge-type retention clamp pusher.

  The form of the first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a wedge-drawing device for a wedge-shaped retention clamp according to a first embodiment of the present invention. Referring to FIG. 1, a wedge pulling device 100 for a wedge-shaped retention clamp according to a first embodiment of the present invention includes a pair of extraction wedge plates 10, a screw block 20 for attaching the pair of extraction wedge plates 10, and a screw block 20. And a pulling force application screw 30 that applies a pulling force for pulling out the wedge 300 (see FIG. 3) to the pair of pulling wedge plates 10.

  FIG. 2 is a detailed view of the structural elements of the wedge pulling device of the wedge-shaped retention clamp according to the first embodiment of the present invention. In FIG. 2 a, the pair of extraction wedge plates 10 has a plurality of attachment screw through-holes 13 into which extraction wedge plate attachment screws 24 are inserted and fixed by nuts 26. The plurality of attachment screw through holes 13 can set the fixed position of the extraction wedge plate 10 corresponding to the distance between the wedge-shaped retention clamp main body 200 and the wedge 300.

  Further, the lateral width of the lower surface 11 of the pair of wedge plates 10 is longer than the lateral width of the upper surface 12, and part 14 on both side surfaces of the plate 10 has an inclined surface that extends toward the lower surface 11. When a pulling force for pulling out the wedge 300 is applied to the pair of pulling wedge plates 10 by the pulling force application screw 30, the inclined surfaces of the pair of pulling wedge plates 10 are spaced from the wedge-shaped retention clamp main body 200 and the wedge 300. (It will be described in detail in FIG. 3).

  Further, the lateral length 16 of the inner side surface of the pair of wedge plates 10 formed by attaching the pair of wedge plates 10 to the screw block 20 is longer than the lateral length 15 of the outer side surface. The shape of the lower surface 11 forms a trapezoid. Thereby, since the trapezoidal edge part of a pair of extraction wedge plate 10 bites into the wedge-shaped retention clamp main body 200 and the wedge 300, the malfunction that this plate remove | deviates from this clamp can be eliminated.

  In FIG. 2 b, the screw block 20 has a pair of extraction wedge plate mounting screws 24 and nuts 26 for attaching the pair of extraction wedge plates 10 to both side surfaces of the screw block main body 21. And in the center part, it has the extraction force application screw hole 22 penetrated for the extraction force application screw 30 to be screwed. Further, the extraction plate mounting screw 24 may be composed of two pairs. Thereby, since a pair of extraction wedge plate 10 is attached to the screw block main body 21 in four places, the more stable attachment is attained.

  In FIG. 2 c, the extraction force application screw 30 includes a screw body 34 having a thread, a hexagonal screw head 32, and a protrusion 36 at the center of the tip of the screw body 34. When the protrusion 36 slightly bites into the wedge 300, the positional relationship between the extraction force applying screw 30 and the wedge 300 can be stabilized, and the wedge can be extracted more easily.

  FIG. 3 is a drawing of a wedge by a wedge-drawing device of a wedge-shaped retention clamp according to the first embodiment of the present invention. In FIG. 3, a pair of extraction wedge plates 10 of a wedge-type retention clamp extraction device 100 are inserted according to the distance between the wedge-type retention clamp main body 200 and the wedge 300 constituting the MAT-type wedge-type retention clamp, and a screw block is interposed therebetween. 20 is temporarily placed. Thus, the extracted wedge plate mounting screw 24 is inserted into the fixed mounting screw through hole 13 and fixed by the nut 26.

  Next, the extraction force application screw 30 is screwed into the extraction force application screw hole 22 by rotating the hexagonal screw head 32 with a hexagon wrench, an impact wrench or the like. When the protrusion 36 of the extraction force application screw 30 reaches the wedge 300, the hexagonal screw head 32 is further rotated. At this time, the protrusion 36 slightly bites the wedge 300, and the positional relationship between the extraction force applying screw 30 and the wedge 300 is stabilized.

  By continuing the rotation more strongly, the trapezoidal edge portion bites into the wedge-shaped retention clamp body 200 and the wedge 300, so that the plate does not come off from the clamp. Further, as the pair of extraction wedge plates 10 are pushed upward, the interval between the wedge-shaped retention clamp main body 200 and the wedge 300 gradually increases, and the wedge 300 is extracted. The weight of the wedge pulling device 100 of the wedge-shaped retention clamp is about 2.5 kg, which is 6 times different from the conventional 15 kg.

  FIG. 4 is a block diagram of a wedge pulling device for a wedge-shaped retention clamp according to a second embodiment of the present invention. In FIG. 4, a wedge pulling device 500 for a wedge-shaped retention clamp according to a second embodiment of the present invention includes a pair of extraction wedge plates 40, a screw block 50 for attaching the pair of extraction wedge plates 40, and a screw block 50. A pulling force applying screw 30 that applies a pulling force to the pair of pulling wedge plates 40 and a pair of adapters 60 that grip the pair of pulling wedge plates 40 is provided. The tip of the extraction force application screw 30 has a protrusion 36 as in FIG. 2c.

  Similarly to the case of FIG. 2a, the lateral width of the lower surface 41 of the pair of extraction plates is longer than the lateral width of the upper surface 44, and part of both side surfaces of the plate have inclined surfaces extending toward the lower surface, Further, the lateral length 43 of the inner surface of the pair of wedge plates 40 formed by attaching the pair of wedge plates 40 to the screw block 50 is longer than the lateral length 42 of the outer surface, forming a trapezoid. doing.

  FIG. 5 is a connection structure diagram of a screw block and a wedge plate according to a second embodiment of the present invention. In FIG. 5a, the main body 52 of the screw block 50 has a pair of extraction wedge plate mounting arms 54 for attaching the pair of extraction wedge plates 40 to both sides. The extraction plate mounting arm 54 has a square shape that is inserted into the square hole 45 of the extraction plate 40, and the upper surface of the square shape has a plurality of mountain-shaped grooves 56. The wedge plate stopper 58 is screwed in. In addition, there is a penetrating force applying screw hole 22 through which the extracting force applying screw 30 is screwed in the center.

  In FIG. 5 b, the wedge plate 40 has a square hole 45 in which the wedge plate mounting arm 54 is inserted, and the upper surface of the square hole 45 has a plurality of mountain-shaped grooves 47. In FIG. 5a, the pair of extraction plate stoppers 58 are removed from the pair of extraction wedge plate mounting arms 54, the pair of extraction wedge plates 40 are inserted, and the pair of extraction wedge plate stops 58 are attached again. 1 is configured to perform the same function as that of the wedge-shaped retaining clamp 100 in FIG.

  Referring again to FIG. 3, a pair of extraction wedge plates 10 of an extraction apparatus 500 for a wedge-type retention clamp without the adapter 60 is inserted according to the distance between the wedge-type retention clamp main body 200 and the wedge 300 constituting the MAT-type wedge-shaped retention clamp. Then, the plurality of mountain-shaped grooves 47 of the extraction wedge plate mounting arm 54 and the plurality of mountain-shaped grooves 56 of the square hole 45 of the extraction wedge plate 40 are maintained in a predetermined positional relationship according to the size of the wedge 300. Engagement and lateral displacement can be prevented.

  The subsequent procedure for extracting the wedge 300 is the same as described in FIG. Since the extraction wedge plate 40 has a non-separation structure that does not come off the extraction wedge plate mounting arm 54 by the extraction wedge plate stopper 58, the length of both ends of the pair of extraction wedge plate attachment arms 54 is the maximum width of the applicable wedge 300. By setting the width of the main body 52 of the screw block to the minimum size of the application wedge 300, there is no need for assembly and disassembly, and the application wedge 300 can be used immediately.

  FIG. 6 is a structural diagram of an adapter according to a second embodiment of the present invention. In FIG. 6, the pair of adapters 60 has a wedge plate gripping groove 65 for gripping the pair of wedge wedge plates 40. The extracted wedge plate holding groove 65 of the pair of adapters 60 has a C-shaped holding groove opened on the inner surface side of the extracted wedge plate 40 to be held. The side surface 67 of the adapter 60 is not a trapezoidal side surface like the wedge plate 40 but has a square side surface that is not inclined in the thickness direction.

  FIG. 7 is a drawing of a wedge by the wedge drawing device of the wedge-shaped retention clamp according to the second embodiment of the present invention. In FIG. 7, a wedge-type retention clamp extraction wedge device 500 with a pair of adapters 60 mounted is attached between the MBT-type clamp 600 and the wedge 300, and paragraphs [0026] and [0027] The wedge 300 is extracted by the same operation as described above. In the case of the MBT type clamp 600, the portion in contact with the plate is smooth and there is no fear of detachment. Therefore, the adapter 60 having a side surface 67 having a rectangular shape is attached to the extraction wedge plate 40. Thereby, the traces on the wedge 300 and the clamp 600 can be suppressed as much as possible, and the wedge clamp can be reused. The weight of the wedge pulling clamp 500 is about 4 kg, which is about four times as large as the conventional 15 kg.

  As described above, according to the present invention, the weight is 1/4 to 1/6 of the conventional one, so that it is excellent in workability and safety on a high-altitude steel tower, and easily by a simple extraction plate. It is possible to provide a wedge-type retention clamp extraction wedge device capable of extracting the retention clamp wedge. Further, by adding an adapter, it is possible to cope with both wedge type retention clamps (MBT and new type clamps), and the wedge clamps can be reused.

DESCRIPTION OF SYMBOLS 10 Pair of wedge plate 11 Lower surface 12 Upper surface 13 Several attachment screw through-holes 14 Part of side surface 15 Lateral length of outer surface 16 Lateral length of inner surface 20 Screw block 21 Screw block main body 22 Extraction force Application screw hole 24 Extraction wedge mounting screw 26 Nut 30 Extraction force application screw 32 Hexagonal screw head 34 Screw body 36 Protrusion 40 A pair of extraction wedge plates 41 Lower surface 42 Lateral lateral length 43 Lateral inner lateral Directional length 44 Upper surface 45 Square hole 47 Projection portion 50 Screw block 52 Screw block body 54 Extraction wedge plate mounting arm 56 Protrusion portion 58 Extraction plate stopper 60 Adapter 65 Extraction wedge plate gripping groove 67 Side surface of the adapter 100 1. Wedge-type retaining clamp pulling device according to one embodiment 200 MAT type clamp body 210 Clamp attachment Plate 300 Wedge 400 Pusher 410 Hook 500 Clamping device for wedge-shaped retention clamp according to the second embodiment of the present invention 600 MBT type clamp body

Claims (4)

An extraction wedge device for extracting a wedge of a wedge-shaped retention clamp for pulling an overhead power transmission line to a steel tower,
A pair of extraction wedge plates; a screw block for attaching the pair of extraction wedge plates; and an extraction force application screw that is screwed into the screw block and applies an extraction force for extracting the wedge to the pair of extraction wedge plates. Have
The screw block has a pair of extraction wedge plate mounting screws and nuts for mounting the pair of extraction wedge plates on both side surfaces, and the extraction force application screw is screwed into the center. Has a through-hole force application screw hole to be
The pair of extraction wedge plates has a plurality of attachment screw through holes for inserting the extraction wedge plate mounting screws and being fixed by the nuts, and a width of a lower surface of the pair of extraction wedge plates Is a wedge pulling device for a wedge-shaped retention clamp, characterized in that it is longer than the lateral width of the upper surface, and a part of both side surfaces of the plate has an inclined surface extending toward the lower surface. The lateral length of the inner side surface of the pair of wedge wedge plates formed by attaching the pair of wedge wedge plates to the screw block is longer than the lateral length of the outer side surface, and the shape of the upper and lower surfaces. Forms a trapezoid,
The tip of the extraction force application screw has a protrusion,
2. The wedge pulling device for a wedge-shaped retention clamp according to claim 1, wherein the screw wedge plate mounting screw of the screw block is constituted by two pairs. An extraction wedge device for extracting a wedge of a wedge-shaped retention clamp for pulling an overhead power transmission line to a steel tower,
A pair of extraction wedge plates; a screw block for attaching the pair of extraction wedge plates; and an extraction force application screw that is screwed into the screw block and applies an extraction force for extracting the wedge to the pair of extraction wedge plates. And a pair of adapters for gripping the pair of extraction wedge plates,
The screw block includes a pair of extraction wedge plate mounting arms and a pair of extraction wedge plate stoppers for attaching the pair of extraction wedge plates to both sides, and the extraction force application screw at the center. Has a through hole for applying a pulling force for screwing
The pair of extraction wedge plates has a square hole into which the extraction wedge plate mounting arm is inserted, and the lateral width of the lower surface of the pair of extraction wedge plates is longer than the lateral width of the upper surface. A part has an inclined surface extending toward the lower surface;
The pair of adapters have a wedge plate holding groove for holding the pair of extraction wedge plates. The lateral length of the inner side surface of the pair of wedge wedge plates formed by attaching the pair of wedge wedge plates to the screw block is longer than the lateral length of the outer side surface, and the shape of the upper and lower surfaces. Has a trapezoidal shape, and the upper surface of the square hole has a plurality of chevron-shaped grooves,
The extraction plate mounting arm of the screw block has a square shape to be inserted into the square hole, and the upper surface of the square shape has grooves similar to the plurality of mountain grooves,
The tip of the extraction force application screw has a protrusion,
The pair of adapter pull-out plate gripping grooves have C-shaped gripping grooves opened on the inner surface side of the pull-out wedge plate to be gripped, and both side surfaces of the pair of adapters are inclined in the thickness direction. 4. A wedge-extracting device for a wedge-shaped retention clamp according to claim 3, wherein the wedge-shaped retaining clamp has a rectangular side surface.

Images