JP2017121142A - Snatch block for cable installation work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent incorrect operation of an operation rope when performing cable installation work by using a snatch block in a pole provided with a pole switch.SOLUTION: A snatch block 10 used when performing installation work of a cable 3 in a pole 2 provided with a pole switch is further provided with an operation rope fixing mechanism for fixing operation ropes 6a, 6b hanging from the pole switch, removably. The operation rope fixing mechanism has a structure for fixing the operation ropes 6a, 6b by sandwiching them between two opposite flat faces. The snatch block 10 includes horizontal distance adjustment mechanisms 128, 129a, 129b for adjusting the horizontal distance from the pole 2 at a part where the operation ropes 6a, 6b are fixed by the operation rope fixing mechanism. The operation rope fixing mechanism includes a first operation rope fixing mechanism 120a for fixing one of the operation ropes 6a, 6b removably, and a second operation rope fixing mechanism 120b for fixing the other of the operation ropes 6a, 6b removably.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a gold wheel used when a cable is installed in a utility pole provided with a pole switch.

  In Patent Literature 1, both ends of an operation cable having a predetermined length are respectively connected to both left and right ends of an opening / closing operation handle of a section switch installed on a pillar, and suspended in a hanging shape. On both sides of the wrapping portion that is the turn-up portion of the rope, the traction engagement portions are provided at positions that are separated from each other by at least a distance exceeding the opening or closing operation stroke length of the opening / closing operation handle. The operating wire wrapping part is wound around the winding wheel of the winding device part and combined so that the entire operating rope becomes tensioned, while the winding device part can be locked and unlocked from the outside Is described as an opening / closing operation device for an electric pole top switch, in which a rotation temporary fixing mechanism is incorporated.

  Patent Document 2 describes a fixing device for a switching operation rope of a pole switch. The opening / closing operation rope fixing device includes a rope fixing tool and a guide member, and the base member of the rope fixing tool includes an attachment plate and a receiving plate, and the attachment plate is provided with two insertion openings in parallel. There are two concave grooves in parallel, and the receiving plate is flush with the front side of the portion excluding the concave groove, and a bolt is inserted from the back side into the bolt hole at the center of the receiving plate. Guide portions are provided at the upper and lower end portions of the concave groove, and the pressing member is mounted by fitting a bolt hole into the bolt, fitting a washer into the bolt, and further screwing a nut.

JP 2002-75142 A Japanese Patent Laid-Open No. 9-147893

  As described in Patent Document 1, the pole switch includes an operation rope (operation rope) for a person to perform an opening / closing operation. The upper end of the operation rope is connected to an operation handle for controlling the opening and closing of the pole switch, and an operator such as an electrician can use this operation rope when laying cables such as power lines and communication lines. Power outage operation and power reception operation are performed by operating the operation handle using.

  FIG. 7 shows a state where the operator 7 is performing the construction work of the cable 3 using the gold wheel 30 in the utility pole 2 provided with the pole switch 5. When the cable 3 is erected, the worker 7 first connects a guide rope (towing line) to the end of the cable 3. Subsequently, the operator 7 passes the guide rope through the gold wheel 30 provided at a predetermined height position of the utility pole 2, and then pulls the guide rope and passes the cable 3 between the adjacent utility poles 2.

  Here, since an erroneous operation of the operation ropes 6a and 6b leads to an electric shock accident and a power failure, the worker 7 touches the operation ropes 6a and 6b with the body and tools (various tools, guide ropes, cables 3, etc.) in the above work. It is necessary to work while always taking care not to equalize. In particular, the cable 3 may be laid on the side of the utility pole 2 with respect to the operating ropes 6a and 6b.

  The utility pole 2 is provided with a lock mechanism 8 for fixing the operation ropes 6a and 6b. However, the lock mechanism 8 is provided at a relatively low position of the utility pole 2, and is connected to the pole switch 5 and lock. Since there is a distance from the mechanism 8, if the body or tool of the worker 7 working during this time touches the operation ropes 6a and 6b, the operation ropes 6a and 6b may move up and down.

  This invention is made | formed in view of such a background, and it aims at preventing the erroneous operation of the operating rope at the time of constructing a cable using a gold wheel in the utility pole provided with the pole switch.

  One aspect of the present invention for achieving the above object is a metal wheel used when a cable is installed in a utility pole provided with a pole switch, and a housing having a support mechanism for supporting the cable. A fixing mechanism that fixes the casing to a predetermined height position of the utility pole, and an operation rope fixing mechanism that is provided in the casing and that removably fixes an operating rope that hangs down from the pole switch. Prepare.

  According to the present invention, by fixing the operation rope hanging from the pole switch to the operation rope fixing mechanism provided in the money wheel used for the cable erection work, the operator's body or tool is mistaken for the operation rope. Even when touched, the operation rope can be prevented from moving up and down, and erroneous operation of the operation rope can be reliably prevented.

  Another aspect of the present invention is the above-described cable laying work wheel, wherein the operation rope fixing mechanism fixes the operation rope by sandwiching the operation rope between two flat surfaces facing each other. Have

  As described above, since the operation rope fixing mechanism has a structure in which the operation rope is fixed by sandwiching the operation rope between the two flat surfaces facing each other, the friction area between the two flat surfaces and the operation rope is large. Thus, when the operation rope is fixed to the operation rope fixing mechanism, it is possible to reliably prevent the operation rope from moving up and down.

  Another aspect of the present invention is the above-described cable laying work gold wheel, wherein the housing includes a flat portion that functions as one of the two flat surfaces facing each other, and the two flat surfaces. A movable plate that functions as the other one of them, and the movable plate is provided on the flat portion via a hinge mechanism, and the flat portion and the movable plate are connected to the flat portion and the movable plate. And a holding mechanism for holding the operation rope in a sandwiched state.

  In this way, by providing the movable plate via the hinge mechanism on the flat portion of the housing and by providing the locking mechanism for holding the operation rope in a sandwiched state, the operation rope fixing mechanism can be realized easily and at low cost. be able to.

  Another aspect of the present invention is the above-described cable erection work wheel, wherein the housing includes a first side plate, a second side plate facing the first side plate, an upper plate, and The second side plate has a lower surface plate facing the upper surface plate, has a substantially rectangular parallelepiped shape in which two surfaces in the direction in which the cable is inserted are opened, the fixing mechanism is provided on the first side surface plate, The outer surface of the face plate constitutes the flat portion.

  When the casing has a substantially rectangular parallelepiped shape in this way, the outer surface of the side plate (second side plate) on the side facing the side plate (first side plate) on the side where the fixing mechanism is provided is used as the flat portion. Thus, the operation rope fixing mechanism can be realized easily and at low cost.

  Another aspect of the present invention is the above-described cable erection work wheel, which includes a horizontal distance adjustment mechanism that adjusts a horizontal distance from the utility pole of a portion to which the operation rope is fixed by the operation rope fixing mechanism. .

  The horizontal distance between the utility pole and the operation rope hanging from the pole switch is not always constant for each site where the installation work is performed, the horizontal distance from the utility pole to the part where the operation rope is fixed, the utility pole and the operation When the horizontal distance between the rope and the rope is different, the operator needs to pull the rope to the rope when the rope is removed from the rope. There is a possibility of moving. However, in the present invention, since the gold wheel is provided with a horizontal distance adjusting mechanism that adjusts the horizontal distance from the utility pole of the portion where the operating rope is fixed by the operating rope fixing mechanism, the operator can fix the operating rope of the operating rope fixing mechanism. The horizontal distance from the utility pole can be adjusted to match the horizontal distance between the utility pole and the control rope, and the control rope moves up and down when the operation rope is attached to and detached from the control rope fixing mechanism. Can be prevented.

  Another aspect of the present invention is the above-described cable erection work wheel, wherein the housing includes a first side plate, a second side plate facing the first side plate, an upper plate, and A pedestal that has a lower surface plate facing the upper surface plate, has a substantially rectangular parallelepiped shape with two surfaces in the direction in which the cable is inserted, and is provided in parallel with the second side surface plate and functions as the flat portion. And a horizontal distance adjusting mechanism for fixing and supporting the pedestal portion in a slidable manner in the horizontal direction.

  When the casing has a substantially rectangular parallelepiped shape, the horizontal distance adjusting mechanism can be realized easily and at low cost by fixing and supporting the pedestal portion functioning as a flat portion in such a manner as to be slidable in the horizontal direction.

  Another one of the present invention is the above-described cable erection work wheel, wherein the first operation rope for detachably fixing one of the two operation ropes hanging from the operation handle of the pole switch. A fixing mechanism; and a second operation rope fixing mechanism for detachably fixing the other of the two operation ropes.

  The operation handle of the pole switch has a seesaw structure. In principle, the operation rope can be prevented from moving up and down by fixing the operation rope fixing mechanism to one of the two ropes hanging from the operation handle. However, as in the present invention, by fixing both of the two operation ropes by the first operation rope fixing mechanism and the second operation rope fixing mechanism, the fixation of one of the operation ropes is temporarily released. Even if it is stuck, it is possible to prevent erroneous operation of the operation rope.

  In addition, the subject which this application discloses, and its solution method are clarified by the column of the form for inventing, and drawing.

  ADVANTAGE OF THE INVENTION According to this invention, the erroneous operation of the operation cord at the time of carrying out the cable construction work using a gold wheel in the electric pole provided with the pole switch can be prevented.

It is a figure which shows the mode of the gold wheel 10 periphery of 1st Embodiment provided in the predetermined | prescribed height position of the utility pole 2. FIG. It is a perspective view which shows the structure of the gold wheel 10 of 1st Embodiment. It is a figure explaining the procedure which fixes operation ropes 6a and 6b to operation rope fixing mechanism 120. It is a figure which shows the mode of the gold wheel 10 periphery of 2nd Embodiment provided in the predetermined | prescribed height position of the utility pole. It is a perspective view which shows the structure of the gold wheel 10 of 2nd Embodiment. It is a figure which shows other embodiment of the gold wheel. It is a figure which shows a mode that the operator 7 is constructing the cable 3 using the gold wheel 30 in the utility pole 2 in which the pole switch 5 was provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings as appropriate.

[First Embodiment]
FIG. 1 and FIG. 2 show the configuration of a gold wheel 10 described as the first embodiment. FIG. 1 is a view showing a state around a gold wheel 10 provided at a predetermined height position of the utility pole 2, and FIG. 2 is a perspective view showing a configuration of the gold wheel 10. The gold wheel 10 is used for erection work (replacement, new installation, etc.) of a cable 3 such as a power line and a communication line performed in a power pole 2 provided with a pole switch (not shown in the figure) at the top. When the cable 3 is erected, the gold wheel 10 is provided at a predetermined height position of the utility pole 2 by an operator such as an electrician who works on the utility pole 2.

  The gold wheel 10 shown in FIGS. 1 and 2 is of a type commonly referred to as a “four-sided gold wheel” and has a substantially rectangular parallelepiped appearance. Of the six surfaces of the gold wheel 10, two surfaces in the direction in which the cable 3 and the guide rope (pull rope) are inserted (the direction of the X axis in the figure) are open. Further, the other four surfaces of the gold wheel 10 are constituted by four flat plate members (a pair of opposed side plates 11 and 12, an opposed upper plate 13 and a lower plate 14) that form a square tube as a whole. . The four plate materials are made of, for example, an insulator such as resin.

  In the internal space of the gold wheel 10, a plurality of guide rollers 15 (support mechanisms) that support the cables 3 inserted into the internal space are provided. The guide roller 15 is made of an insulating material such as resin, for example. For example, the plurality of guide rollers 15 are arranged in a lattice shape when viewed from the direction of the opening (the direction of the X axis in the figure). Each of the plurality of guide rollers 15 is pivotally supported around a rotation axis by a bearing mechanism (not shown) embedded in two plate members opposed to each other by four plate members.

  A fixing mechanism (not shown) for fixing the gold wheel 10 to the power pole 2 is provided on the side plate 11 on the side located on the power pole 2 side of the gold wheel 10. The fixing mechanism has a belt connecting portion (not shown) to which a belt-like belt 4 wound around the utility pole 2 is connected.

  As shown in the drawing, two operation ropes 6a and 6b hanging from an operation handle (not shown) of a pole switch provided near the upper portion of the utility pole 2 can be attached to and detached from the side plate 12 of the gold wheel 10. An operation rope fixing mechanism 120 is provided for fixing. The operation rope fixing mechanism 120 includes one or more side plates 12 having a flat outer surface, two movable plates 121a and 121b, and one or more pivotally supporting the two movable plates 121a and 121b on the outer surface of the side plate 12. A hinge mechanism 122 is included. The movable plate 121a and the side plate 12 constitute a first operation rope fixing mechanism 120a, and the movable plate 121b and the side plate 12 constitute a second operation rope fixing mechanism 120b.

  The plane of each of the movable plates 121a and 121b is substantially rectangular, and the area of the plane is about ½ of the area of the plane of the side plate 12 of the gold wheel 10. In the hinge mechanism 122, a line parallel to the operation ropes 6a and 6b connecting the midpoint of the upper side of the side plate 12 and the midpoint of the lower side of the side plate 12 (a line parallel to the Z axis in the figure) is the rotation axis. Are arranged to match.

  A claw portion 125a for locking the movable plate 121a and a claw portion 125b for locking the movable plate 121b are located near the midpoint of each of the two opposing sides parallel to the Z-axis of the side plate 12. And are provided. Each of the claw portions 125a and 125b has a hook-like cross-sectional shape.

  When the operation ropes 6a and 6b are fixed to the gold wheel 10 in the construction work of the cable 3 using the gold wheel 10, the operator rotates the movable plates 121a and 121b around the rotation shafts, respectively. The operation rope 6a is sandwiched between the movable plate 121a and the side plate 12, and the operation rope 6b is sandwiched between the movable plate 121b and the side plate 12.

  Specifically, first, as shown in FIG. 3A, the operator places the operation rope 6a between the side plate 12 and the movable plate 121a, and the operation rope 6b between the side plate 12 and the movable plate 121b. Position. Subsequently, as shown in FIG. 3 (b), the operator presses the movable plate 121a and the movable plate 121b against the side plate 12, respectively. , Respectively. Thereby, the operation rope 6a is sandwiched between the side plate 12 and the movable plate 121a and fixed (locked) to the operation rope fixing mechanism 120 (first operation rope fixing mechanism), and the operation rope 6b is fixed to the side plate 12 And the movable plate 121b and is fixed to the operation rope fixing mechanism 120 (second operation rope fixing mechanism).

  In this way, in the construction work of the cable 3 using the gold wheel 10, the operator simply connects the two operation ropes 6 a and 6 b hanging from the pole switch 5 to the operation rope fixing mechanism 120 provided on the gold wheel 10. Can be easily fixed by simple operation. Further, since the operation ropes 6a and 6b are both fixed in the vicinity of the height position where the worker exists, even when the operator or the like accidentally contacts the operation ropes 6a and 6b, the operation ropes 6a and 6b move up and down. Incorrect operation of the operation ropes 6a and 6b can be prevented.

  Note that the operation handle of the pole switch 5 generally has a seesaw structure, and in principle, only one of the two operation ropes 6a and 6b is fixed so that the operation ropes 6a and 6b move up and down. Can be prevented. However, as described above, by fixing both of the two operation ropes 6a and 6b by the first operation rope fixing mechanism 120a and the second operation rope fixing mechanism 120b, the fixation of one of the operation ropes is temporarily released. Even in this case, the operation ropes 6a and 6b can be prevented from moving up and down.

  Further, the surface of the side plate 12 and the movable plates 121a and 121b on the side where the operation ropes 6a and 6b abut is flat, and the operation ropes 6a and 6b are interposed between the side plate 12 and the movable plates 121a and 121b. When the nip is clamped, the friction area between the side plate 12 and the movable plates 121a and 121b and the operation ropes 6a and 6b is increased, and the operation ropes 6a and 6b can be securely fixed.

  In addition, since the side of the side plate 12 and the movable plates 121a and 121b on the side where the operation ropes 6a and 6b abut is flat, the operation rope 6a is fixed when the operation rope 6a is fixed to the operation rope fixing mechanism 120. 6a and 6b are safe without moving up and down. In order to increase the holding force when the operation ropes 6a and 6b are held, for example, the side of the side plate 12 or the movable plates 121a and 121b on which the operation ropes 6a and 6b abut is formed in a wave shape or a step shape. However, in this case, when the operation ropes 6a and 6b are attached to and detached from the operation rope fixing mechanism 120, the operation ropes 6a and 6b are bitten and pulled, or the bites are loosened. There is a possibility of moving up and down.

  Although not shown, all or a part of the gold wheel 10 has a structure that can be disassembled, and the gold wheel 10 can be easily detached from the cable 3 on the spot after the construction work of the cable 3 is completed. It is like that. Specifically, all or a part of the guide roller 15 has a structure in which the rotation shaft can be removed from the plate material (side plate 11, side plate 12, top plate 13, bottom plate 14). A structure that can be slid and a structure in which the rotation shaft can be accommodated in the guide roller 15 by an operation from the side of the guide roller 15, and a structure that can open all or part of the plate material ( The structure can be opened by a hinge mechanism or the like. The operator can easily release the cable 3 to the outside of the gold wheel 10 (square tube) by removing all or a part of the plate material and removing the guide roller 15 (remove the gold wheel 10 from the cable 3). it can.

[Second Embodiment]
The horizontal distance between the utility pole 2 and the operation rope 6a, 6b hanging from the pole switch is not always constant at each site where the construction work is performed, and the operation rope 6a, 6b of the operation rope fixing mechanism 120 is fixed. When the horizontal distance between the utility pole 2 and the horizontal distance between the utility pole 2 and the operation ropes 6a and 6b is different, the operator can remove the operation ropes 6a and 6b from the operation rope fixing mechanism 120. However, it is necessary to draw the operation ropes 6a and 6b to the operation rope fixing mechanism 120, and the operation ropes 6a and 6b may move up and down at that time. Thus, in the second embodiment, the gold wheel 10 is provided with a configuration (horizontal distance adjusting mechanism) that supports the operation rope fixing mechanism 120 so as to be movable in the horizontal direction. It is possible to adjust the horizontal distance from the utility pole 2 of the portion where the is fixed.

  4 and 5 show the configuration of the gold wheel 10 described as the second embodiment. FIG. 4 is a view showing a state around the gold wheel 10 provided at a predetermined height position of the utility pole 2, and FIG. 5 is a perspective view showing a configuration of the gold wheel 10. As shown in these drawings, the gold wheel 10 of the second embodiment is a pedestal composed of a substantially rectangular flat plate having a plane as large as the side plate 12 of the gold wheel 10 as the operation rope fixing mechanism 120. Part 128, movable plates 121 a and 121 b that are rotatably supported on the surface of base part 128 via hinge mechanisms 122 and 122, and L-shaped members 129 a and 129 b that support base part 128. The pedestal portion 128 is supported by the L-shaped members 129a and 129b so that the plane is parallel to the side plate 12 at a position spaced apart from the side plate 12 of the gold wheel 10 by a predetermined distance.

  Each of the L-shaped members 129a and 129b has two orthogonal rectangular pieces (rectangular pieces 1291a and 1292a for the L-shaped member 129a and rectangular pieces 1291b and 1292b for the L-shaped member 129b). For any L-shaped member 129a, 129b, one rectangular piece 1291a, 1291b is joined to the back surface of the pedestal 128 (the normal is the surface in the -Y direction), and the other rectangular piece 1292a, 1292b is gold. The upper surface plate 13 of the vehicle 10 is connected to the surface (the normal line is the surface in the + Z direction).

  As shown in the figure, in the plane of the other rectangular pieces 1292a and 1292b, rectangular holes are formed by being elongated in the direction of the Y-axis, and the L-shaped members 129a and 129b The bolts 135a and 135b inserted into the metal wheel 10 are screwed into screw holes (not shown) formed in the upper surface plate 13 of the metal wheel 10 to be attached to the metal wheel 10. Then, by loosening the bolts 135a and 135b, the operator can easily move (slide) the pedestal portion 128 in the horizontal direction (the Y-axis direction shown in the figure) in the Y-axis direction.

  When the operator fixes the operation ropes 6a and 6b to the operation rope fixing mechanism 120, the operator keeps the horizontal between the utility pole 2 and the operation ropes 6a and 6b so that the operation ropes 6a and 6b do not move up and down. The pedestal 128 is moved in the Y-axis direction so as to match the distance in the direction, and the horizontal distance from the utility pole 2 of the portion to which the operation ropes 6a and 6b are fixed is adjusted by the operation rope fixing mechanism 120.

  By the way, the embodiments described above (the first embodiment and the second embodiment) are for facilitating the understanding of the present invention, and do not limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof.

  For example, in the above embodiment, the movable plates 121a and 121b are locked to the side plate 12 of the gold wheel 10 by the claw portions 125a and 125b, but the mechanism for locking the movable plates 121a and 121b is limited to this. Absent. For example, as shown in FIG. 6, butterfly screws 126a and 126b (butterfly bolts) provided at predetermined positions of the movable plates 121a and 121b are screw holes 128a and 128b (screw holes 128b are not provided) provided on the side plate 12 side. It is good also as a structure screwed together in illustration.

  Further, for example, in order to securely fix the operation ropes 6a and 6b to the operation rope fixing mechanism 120, an operation such as roughening is performed on the surface of the side plate 12 and the movable plates 121a and 121b on the side where the operation ropes 6a and 6b abut. A structure for preventing slipping of the ropes 6a and 6b may be provided. However, the structure is provided so that the operation ropes 6a and 6b do not move up and down when the operation ropes 6a and 6b are attached to and detached from the operation rope fixing mechanism 120.

  In addition, the gold wheel 10 may include, for example, a structure such as an arm structure or a fall prevention wire for supporting the gold wheel 10 at a predetermined distance from the utility pole 2.

2 Electric pole, 3 cable, 4 belt, 5 pole switch, 6a, 6b operation rope, 10 gold wheel, 11 side plate, 12 side plate, 120 operation rope fixing mechanism, 120a first operation rope fixing mechanism, 120b first 2 operation rope fixing mechanism, 121a, 121b movable plate, 122 hinge mechanism, 125a, 125b claw portion, 128 pedestal portion, 129a, 129b L-shaped member, 13 upper surface plate, 14 lower surface plate, 15 guide roller

Claims (7)

It is a money wheel used when erection work of a cable in a utility pole provided with a pole switch,
A housing having a support mechanism for supporting the cable;
A fixing mechanism for fixing the housing to a predetermined height position of the utility pole;
An operation rope fixing mechanism that is provided in the housing and fixes the operation rope hanging from the pole switch so as to be removable.
Cable erection work wheel equipped with. A cable erection work wheel according to claim 1,
The operation rope fixing mechanism has a structure for fixing the operation rope by holding the operation rope between two flat surfaces facing each other.
Cable laying work gold wheel. A cable erection work wheel according to claim 2,
The housing includes a flat portion that functions as one of the two flat surfaces facing each other, and a movable plate that functions as the other of the two flat surfaces.
The movable plate is provided on the flat portion via a hinge mechanism,
A locking mechanism for holding the flat portion and the movable plate in a state where the operation rope is sandwiched between the flat portion and the movable plate;
Cable laying work gold wheel. The cable laying work wheel according to claim 3,
The housing includes a first side plate, a second side plate facing the first side plate, an upper surface plate, and a lower surface plate facing the upper surface plate, and 2 in a direction in which the cable is inserted. It has a substantially rectangular parallelepiped shape with two faces open,
The fixing mechanism is provided on the first side plate,
The outer surface of the second side plate constitutes the flat portion.
Cable laying work gold wheel. A cable erection work wheel according to any one of claims 1 to 5,
A horizontal distance adjustment mechanism that adjusts a horizontal distance from the utility pole of a portion to which the operation rope is fixed by the operation rope fixing mechanism;
Cable laying work gold wheel. The cable laying work wheel according to claim 3,
The housing includes a first side plate, a second side plate facing the first side plate, an upper surface plate, and a lower surface plate facing the upper surface plate, and 2 in a direction in which the cable is inserted. It has a substantially rectangular parallelepiped shape with two faces open,
A pedestal portion provided in parallel to the second side plate and functioning as the flat portion;
A horizontal distance adjusting mechanism for fixing and supporting the pedestal portion in a horizontal direction on the housing;
A cable erection work gold wheel. A cable erection work wheel according to any one of claims 1 to 6,
The first operation rope fixing mechanism for removably fixing one of the two operation ropes hanging from the operation handle of the pole switch, and the other of the two operation ropes for removably fixing the second operation rope. 2 of the operation rope fixing mechanism,
Cable laying work gold wheel.

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