JP2013099003A - Holding tool and method of attaching protective sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a holding tool capable of surely holding a protective sheet on a surface of a columnar erected body.SOLUTION: In a holding tool 1, by rotation of a screw rod 19, arm parts 7, 8 move to a closing direction and a contact part 22 on a tip of the screw rod projects between the arm parts. Contact parts 71, 81 of the arm parts and the contact part of the screw rod contact a side face of a columnar erected body P to fasten the side face of the columnar erected body P from the three sides. Action transmission parts 11, 12 extending from a shaft part 4 to a side substantially opposite to the arm parts are formed. An expanding part 20 connected to the screw rod moves to the shaft part side by the rotation of the screw rod, and enters between the action transmission parts so as to expand them. The action to open the action transmission parts is transmitted to the arm parts so that the arm parts are moved to the closing direction.

Description

  The present invention is used by being attached to the tip of a tool such as a common operation rod for indirect hot-wire construction, for example, and by holding a column main body of a columnar standing body such as a utility pole, a protective device such as a protective sheet is vertically installed The present invention relates to a tool that is attached to a columnar standing body so as to cover the side surface of the body, and that is intended for safety of workers in hot-line construction in the vicinity of a high-voltage distribution line, and a method for attaching a protective sheet using this clamping tool.

  In high voltage distribution line construction, for example, as shown in Patent Document 1 to Patent Document 3, etc., a live line that performs work in the vicinity of the charging unit while charging the high voltage distribution line in order to suppress power outages around the work site. In order to ensure the safety of workers in such live-line construction, workers install high-voltage distribution lines after attaching protective equipment to live parts such as electric wires. Like to do. And about the armor supported by the electric pole, the insulator and the electric wire arranged on this armor, etc., for example, there may be a dedicated armor as shown in the transformer pole working armor or the like according to Patent Document 2. Are known.

  On the other hand, depending on the weather conditions, the surface of the pole pole body may be wet with rainwater, etc., and the concrete that constitutes the pole can also conduct electricity, and within the pole Since there are reinforcing bars that can easily conduct electricity, a ground fault will occur if the high-voltage distribution line being charged comes into direct contact with the surface of the main pole body. Wear protective equipment on the surface of the main pole body. There is a need.

  In this regard, for example, the invention according to Patent Document 3 is already known as a utility pole insulation protector that can be easily attached to a utility pole using an indirect hot wire tool. The utility pole insulation armor shown in Patent Document 3 will be outlined below. The utility pole insulation protector is attached to the utility pole and holds a protective sheet placed on an object such as a brace. The utility pole insulation protector includes at least an insulator main body, a sandwiching portion, and a spring material. Among these, the insulator main body is configured by bending a plate-like member into a substantially U-shaped cylindrical shape with one side open, and the inner diameter dimension of the cylindrical upper and lower openings is larger than the diameter dimension of the utility pole. The sandwiching portion is biased in a direction in which one end is connected to the open end of the insulator body via a spring portion to close the opened side of the insulator body. Thus, the electric pole is clamped between the clamping part and the inner surface of the insulator main body. Further, the protective sheet is configured to be affixed to the utility pole insulation protector with a hook-and-loop fastener provided on the outer surface of the utility pole insulation protector.

Japanese Patent Laid-Open No. 9-191518 JP 2000-60982 A JP 2008-29056 A

  However, in the configuration of the utility pole insulation protector shown in Patent Document 3, it is not possible to adjust the spring force output from the spring portion when the utility pole is pressed against the inner peripheral surface side of the insulator body by the sandwiching portion. Since the utility pole insulation armor is moved and attached to the utility pole while resisting the spring force of the clamping portion, there is a problem that the installation work to the utility pole becomes complicated.

  And the utility pole insulation protector shown by patent document 3 tries to clamp a utility pole in contact with the surrounding surface of a utility pole, and the curved surface formed in the clamping part and the curved surface formed in the insulator main body. However, depending on the installation location of the utility pole insulation protector, the curved surface formed on the clamping part and the curved surface formed on the insulator body do not match the peripheral surface of the utility pole, Since the contact area is relatively small, if the spring force output from the spring portion is relatively small, it may be difficult to sufficiently clamp the utility pole without rattling.

  Moreover, since various appliances such as a transformer are arranged on the pole of the utility pole, like the utility pole insulation protector shown in Patent Document 3, it is along the axial direction of the utility pole of the insulator body of the utility pole insulation protector. If the width is relatively large, there is an increased possibility that the utility pole insulation protector will interfere with these devices when the utility pole insulation protector is attached, and there is a disadvantage that the range and position where the utility pole insulation protector can be used are limited.

  Furthermore, in the utility pole insulation protector shown in Patent Document 3, since the protection sheet is only attached to the outer surface of the insulator main body with the hook-and-loop fastener, the protection sheet may fall due to a strong wind or human error.

  Therefore, the present invention can adjust the tightening force when tightening the columnar standing body when attaching an insulating protective sheet to the surface of the columnar standing body such as a utility pole, and the diameter dimension of the columnar standing body can be adjusted. The clamping tool capable of holding the protective sheet securely without being affected by the influence of the fluctuations and not being interfered with by the instrument arranged on the column of the columnar erected body when attached to the columnar erected body. It aims at providing the attachment method of the protection sheet using the tool for clamping.

  In the clamping tool according to the present invention, the first and second arm portions having contact portions that contact the side surfaces of the columnar standing body, the first arm portion, and the second arm portion are contacted with each other. The first and second connecting portions provided at the end portions of the contact portions and connected via shafts so that the contact portions move in a relatively far and away direction, and the first and second connecting portions from the first and second connecting portions. By extending in a direction different from the first and second arm portions and moving in the direction in which the extending direction ends are separated from each other, the contact portions of the first and second arm portions are relatively moved. The first arm portion and the first arm portion from the shaft portion by being inserted into a clamping member having first and second motion transmission portions that move in the approaching direction and a screw hole provided in the shaft portion. A screw rod capable of projecting at one end between the two arm portions and the other end of the screw rod. Then, as the projecting amount of the screw rod from the shaft portion increases, the screw rod enters between the first and second motion transmitting portions and pushes the first and second motion transmitting portions in a direction to be relatively separated from each other. And an operation member having an abutting portion that abuts against the columnar standing body at one end of the screw rod (claim 1). Here, the columnar standing body is, for example, a columnar or truncated cone shape made of iron or reinforced concrete that conducts electricity, and further includes a utility pole or the like. Moreover, the adapter which can mount | wear with the front-end | tip of the common operation rod of the tool for indirect hot-wire may be provided in the expansion part of the operation member. The contact portions of the first and second arm portions and the contact portion provided at one end of the screw rod are made of a non-slip material on the surface that contacts the columnar standing body such as rubber.

  As a result, the first arm and the second arm stand upright in a state where the screw rod of the operation member is inserted into the screw hole of the shaft portion of the clamping member and the contact portion is provided at one end of the screw rod. Installed in the adapter after the entire circumference of the columnar standing body is surrounded by the first and second arm parts in a state where the diameter is larger than the diameter of the body and the columnar standing body is brought close to the radial direction. By rotating the shared operation rod, the spreading portion and the screw rod rotate, the contact portion of the tip of the screw rod approaches the side surface of the columnar standing body, and the motion transmission portion is caused by the spreading portion. The first arm part and the second arm part move in the closing direction as the gap is expanded, and the contact portions provided on the first arm part and the second arm part are the side surfaces of the columnar standing body. In the end, the side surface of the columnar standing body is in contact with the first and second arm portions. It is supported at three points between the contact portion of the minute and the screw rod. And, when tightening the columnar standing body more, it is only necessary to rotate the common operation rod attached to the adapter more. When loosening the tightening to the columnar standing body, the common operation rod attached to the adapter is used. Can be reversed.

  In the clamping tool according to the present invention, the first and second arm portions of the clamping member are biased in a direction in which the contact portions are separated from each other (Claim 2). ). For example, a coil spring is used as a mechanism for biasing the first arm portion and the second arm portion in the direction of separating them from each other.

  As a result, by rotating the common operation rod attached to the adapter in the reverse direction, the screw rod moves in a direction in which one end thereof is separated from the columnar standing body. Therefore, the first arm part and the second arm part are applied by the urging force. The contact portions move in a direction away from each other, and the first arm and the second arm return to a state where they are more open than the diameter of the columnar standing body.

  Furthermore, in the clamping tool according to the present invention, the first and second motion transmitting portions of the clamping member are disposed on the distal end side of the first and second motion transmitting portions in the extending direction. Each of the extending directions of the first and second motion transmitting portions, and a proximal end portion disposed closer to the shaft portion than the distal end portion, and the first motion transmitting portion The mutually opposing surfaces of the distal end side portion and the distal end side portion of the second motion transmitting portion are a proximal end portion of the first motion transmitting portion and a proximal end portion of the second motion transmitting portion. It is characterized in that it is greatly inclined toward the opposite side of the shaft portion with respect to the axis line connecting the shaft portion and the screw rod rather than the mutually facing surfaces.

  As a result, the spreader part moves between the distal end side parts of the first and second motion transmission parts than when the spreader part moves between the proximal end parts of the first and second motion transmission parts and spreads. When moving and spreading, since the pushing force transmitted from the spreading portion to the first and second motion transmitting portions is larger even if the amount of movement of the spreading portion is the same, the first and second Since the two arm portions surround the columnar standing body, the closing speed is relatively high, and the contact portion of the first and second arm portions and the contact portion of the screw rod are in contact with the columnar standing body. The speed when tightening is relatively slow.

  A protective sheet mounting method according to the present invention is a protective sheet mounting method in which a plurality of the clamping tools according to claims 1 to 3 are used, wherein one of the clamping tools is thin and flexible. Insulating protective sheet is attached in advance, and after attaching the clamping tool to which the protective sheet is attached to the side surface of the columnar erected body, in the axial direction of the columnar erected body of the protective sheet The other clamping tool is attached to the side surface of the columnar standing body above the lower end along the line (claim 4). In addition, in the method for attaching the protective sheet according to the present invention, not only the clamping tool according to the present invention but also the clamping tool according to the present invention and a known tool called a sheet fixing scissor, a sheet scissor, etc. are used in combination. You may do it.

  As a result, the protective sheet is reliably and easily attached to the side surface of the columnar standing body, and the protective sheet does not fall to the extent that the wind blows or the tool is touched by human error.

As described above, according to the first to fourth aspects of the present invention, the first arm and the second arm are opened more than the diameter of the columnar standing body, and the first and second arms After the entire circumference of the columnar standing body is surrounded by the portion, the screw rod connected to the spreading portion is rotated by rotating the spreading portion, and the contact portion of the tip of the screw rod is While approaching the side surface, the movement transmitting portion is pushed and spread by the pushing and spreading portion, and the first arm portion and the second arm portion move in a closing direction, and accordingly, the first arm portion, Since the contact portion provided on the second arm portion is close to the side surface of the columnar standing body, the side surface of the columnar standing body is connected to the contact portion of the first and second arm portions and the contact portion of the screw rod. Therefore, there is a variation in the diameter size of the part where the tool for clamping the columnar standing body is attached. Even, it is possible to stably good clamping the columnar stand 設体. And the adjustment of tightening of the clamping tool with respect to the columnar standing body can be dealt with only by changing the amount of rotation with respect to the screw rod and consequently the expanding portion.
Further, since the width along the axial direction of the columnar erected body when the clamping tool is mounted on the columnar erected body is relatively small, it is disposed on the column of the columnar erected body when the clamping tool is mounted. It is possible to prevent interference with the device.

  In particular, according to the second aspect of the present invention, the screw rod moves in a direction in which one end thereof is separated from the columnar standing body by reversely rotating the spreading portion, and accordingly, the spreading portion is also the motion transmitting portion. The first arm portion and the second arm portion are biased with each other because the expansion force between the motion transmitting portions by the expansion portion is weakened. Because the first and second arms automatically move back to a state where the diameter of the mounting portion of the columnar upright body is larger than the diameter of the mounting portion of the columnar erected body. The removal operation of the tool from the columnar standing body can be easily performed.

  In particular, according to the third aspect of the present invention, the first and second spreading portions are more spread than when the pushing and spreading portion moves between the proximal end portions of the first and second motion transmitting portions and spreads. Pushing force transmitted from the spreading portion to the first and second motion transmitting portions when moving between the distal end portions of the motion transmitting portion to spread the same even if the amount of movement of the spreading portion is the same Therefore, the first and second arm portions surround the columnar standing body so that the closing speed can be relatively increased to quickly surround the columnar standing body, and the first And the abutting portion of the second arm portion and the abutting portion of the screw rod abut against the columnar standing body and can be relatively slowed down, so that the columnar standing body can be It becomes easy to adjust so that it can be appropriately clamped between the contact portion of the second arm portion and the contact portion of the screw rod.

  In particular, according to the invention described in claim 4, the protective sheet can be securely and easily attached to the side surface of the columnar standing body. It is possible not to fall.

FIG. 1 is an explanatory view showing components such as a clamping member and an operation member constituting the clamping tool according to the present invention. FIG. 2 is a cross-sectional view showing a configuration of a connecting portion of a clamping member constituting the clamping tool. FIG. 3 is a cross-sectional view showing a configuration of a shaft portion used in the connecting portion of the clamping member. FIG. 4 is a cross-sectional view showing a tip end portion of a screw rod constituting the clamping tool. FIG. 5 is an explanatory diagram showing a configuration of a clamping tool in which the clamping member and the operation member are assembled and the first arm portion and the second arm portion are opened. FIG. 6 is an explanatory diagram showing a configuration of a clamping tool in which the clamping member and the operation member are assembled and the first arm portion and the second arm portion are closed. FIG. 7 is an explanatory view showing a state where the utility pole is clamped by the clamping tool, and FIG. 7A is a rear view as seen from the front end side of the first and second arm portions of the clamping tool. (B) is a cross-sectional view of the electric pole and a plan view of the clamping tool, FIG. 7 (c) is a front view as viewed from the side of the clamping tool, and FIG. 7 (d) is as viewed from the side of the clamping tool. FIG. FIG. 8 is an explanatory view showing a state in which the protective sheet is attached to the utility pole with two clamping tools, and FIG. 8A is a rear view of the clamping tool as viewed from the front end side of the first and second arm portions. FIG. 8 (d) is a side view seen from the side of the clamping tool, and FIG. 8 (c) is a front view seen from the side of the spreading portion of the clamping tool. FIG. 9 is an explanatory view showing a state in which the clamping tool according to the present invention and a known sheet scissors are used in combination when the protective sheet is attached to the utility pole.

  Embodiments of the present invention will be described below with reference to the drawings.

  1, 5, and 6, the overall configuration of a clamping tool 1 according to the present invention is shown. As shown in FIG. 1, the clamping tool 1 is basically composed of a clamping member 2 and an operation member 3, and is attached to a columnar standing body P such as a utility pole shown in FIG. It has become a thing. In addition, the columnar standing body P such as a power pole is made of, for example, iron or reinforced concrete, and can be anything that can conduct electricity, and the shape thereof is a columnar shape having the same diameter from the upper end to the lower end. Alternatively, for example, the top portion may have a truncated cone shape having a diameter of 19 cm and the portion to which the clamping tool 1 is attached may have a diameter of 23 cm, and the diameter at the portion to which the clamping tool 1 is attached is also 20 cm or 23 cm. It may be a wide variety.

  The sandwiching member 2 is configured by connecting a sandwiching member structural body 5 and a sandwiching member structural body 6 with a shaft portion 4. The sandwiching member constituting bodies 5 and 6 have arm portions 7 and 8, connecting portions 9 and 10, and operation transmitting portions 11 and 12, respectively. The arm portions 7 and 8, the connecting portions 9 and 10, and the operation transmitting portion 11 are included. , 12 are integrally formed in this embodiment and are made of a resin material such as a synthetic resin such as plastic.

  The arm portions 7 and 8 are arc-shaped columns that extend in directions close to each other after extending from the connecting portions 9 and 10 to the tip side, and have a column shape that is not thick. The longitudinal dimension and the curvature can be accommodated in the region formed between these arm portions 7 and 8 regardless of whether the diameter of the columnar standing body P is 20 cm or 23 cm, for example. Yes. And the contact parts 71 and 81 for contact | abutting to the side peripheral surface extended in the axial direction of the columnar standing body P are arrange | positioned on the front end side of the arm parts 7 and 8 in the form of substantially mutually opposed. The contact portions 71 and 81 are formed of a material that is relatively difficult to slip, such as rubber.

  As shown in FIG. 2, each of the connecting portions 9, 10 includes two flat plate portions 91, 92, 101, 102, and standing plates that connect the flat plate portion 91 and the flat plate portion 92, or the flat plate portion 101 and the flat plate portion 102. The cross section composed of the plate portions 93 and 103 is U-shaped, and the box B is constructed by assembling the flat plate portion 91 and the flat plate portion 101 and the flat plate portion 92 and the flat plate portion 102 so as to partially overlap each other. Yes. In this embodiment, the connecting portion 9 and the connecting portion 10 are assembled so that the flat plate portions 91 and 92 of the connecting portion 9 are outside the flat plate portions 101 and 102 of the connecting portion 10. The flat plate portions 101 and 102 of the connecting portion 10 may be assembled so as to be outside the flat plate portions 91 and 92 of the connecting portion 9. The flat plate portions 91 and 92 of the connecting portion 9 and the flat plate portions 101 and 102 of the connecting portion 10 are respectively formed with through holes 13 and 14 into which screws 15 and 16 described below are inserted. When the connecting portion 10 is appropriately assembled, the through hole 13 of the flat plate portion 91 and the through hole 14 of the flat plate portion 101 and the through hole 13 of the flat plate portion 92 and the through hole 14 of the flat plate portion 102 communicate with each other. ing.

  As shown in FIG. 2, the shaft portion 4 is accommodated in a space S defined in a box B formed by assembling the connecting portion 9 and the connecting portion 10, and has a cylindrical shape. In addition, as shown in FIG. 2 and FIG. 3, a screw hole 41 is formed as a through hole opened in the side circumferential surface so that a screw rod 19 described below can be inserted. Further, as shown in FIG. 3, the shaft portion 4 has a bottomed screw hole 42 into which the screws 15 and 16 are screwed on both sides in the axial direction. The screw hole 42 communicates with the through hole 13 of the flat plate portions 91 and 92 and the through hole 14 of the flat plate portions 101 and 102. The heads of the screws 15 and 16 are larger than the inner diameter dimensions of the through holes 13 of the flat plate portions 91 and 92 and the through holes 14 of the flat plate portions 101 and 102.

  Thereby, after assembling the connecting portion 9 and the connecting portion 10 so that the shaft portion 4 is accommodated in the space S when the box body B is configured, the screw 15 is inserted into the communicating through holes 13 and 14 and the screw hole 42. By inserting the screw 16 into the inserted and communicating through holes 13 and 14 and the screw hole 43, the shaft portion 4, the connecting portion 9, and the connecting portion 10 are loose so that the arm portion 7 and the arm portion 8 can swing. Engaged.

  As shown in FIG. 2, the shaft portion 4 has coil springs 17 and 17 wound around the both sides in the axial direction so as to avoid the screw holes 41. As shown in FIG. The one ends 17a of 17 and 17 reach the predetermined part from the connecting part 9 side of the arm part 7, and the other ends 17b of the coil springs 17 and 17 reach the predetermined part from the connecting part 9 side of the arm part 7. Are incorporated in the arm portions 7 and 8. Thereby, the arm part 7 and the arm part 8 are urged | biased by the spring force of the coil springs 17 and 17 in the direction which a front-end | tip opens normally.

  The motion transmitting portions 11 and 12 are moved in a direction shifted from 180 degrees to 90 degrees with respect to the extending direction from the connecting portions 9 and 10 of the arm portions 7 and 8 and the motion transmitting portions 11 and 12 are opened and closed. Is extended from the connecting portions 9 and 10 at a position where the arm portions 7 and 8 can be smoothly transmitted and converted to open and close movement opposite to the motion transmitting portions 11 and 12. That is, when the motion transmission unit 11 and the motion transmission unit 12 move in the opening direction, the arm 7 and the arm unit 8 are transmitted to the arm unit 7 and the arm unit 8 as a closing motion via the shaft unit 4, and the motion transmission unit 11 and the motion transmission unit 12 are transmitted. And the arm portion 7 and the arm portion 8 are transmitted to the arm portion 7 and the arm portion 8 as movements in the opening direction via the shaft portion 4.

  In this embodiment, the motion transmitting units 11 and 12 are, in this embodiment, the distal end side portions 111 and 121 located on the distal end side in the extending direction of the motion transmitting units 11 and 12 and the extending direction of the motion transmitting units 11 and 12. It is comprised by the base end side site | parts 112 and 122 located in the connection parts 9 and 10 side. The surfaces of the distal end side portions 111 and 121 that face each other are relative to the axis that connects the shaft portion 4 and the screw rod 19 from the proximal end side portions 112 and 122 toward the distal end side of the distal end side portions 111 and 121. Inclined in a direction away from each other at a steep angle. Further, the surfaces of the base end side portions 112 and 122 facing each other are inclined in a direction away from each other at a gentle angle from the connecting portions 9 and 10 toward the tip end side portions 111 and 121. Yes. It should be noted that the opposed surfaces of the distal end side portions 111 and 121 and the opposed surfaces of the proximal end side portions 112 and 122 are not in contact with the screw rod 19 (to be described later) when they are close to each other. It may be cut away while leaving the part to contact. That is, the proximal end portions 112 and 122 and the distal end portions 111 and 121 of the motion transmitting portions 11 and 12 are the flat plate portions 91 and 101, the flat plate portions 92 and 102, and the standing plate portions 93 and 103 of the connecting portions 9 and 10. The cross section formed by two flat plate portions and standing plate portions that are connected to each other may be U-shaped. Further, in this embodiment, the dimension in the extending direction of the motion transmitting portions 11 and 12 of the proximal end portions 112 and 122 is larger than the dimension in the extending direction of the motion transmitting portions 11 and 12 of the distal end side portions 111 and 121. It is getting bigger.

  The operation member 3 is disposed on the screw rod 19, a spreader portion 20 disposed on one end side in the axial direction of the screw rod 19, and the screw rod 19 side opposite to the spreader portion 20. An adapter 21 is provided, and a contact portion 22 that comes into contact with the columnar standing body P is provided at the tip of the screw rod 19 on the side opposite to the side of the spreading portion 20.

  The screw rod 19 is a substantially cylindrical rod shape whose side is threaded, and can be screwed into the screw hole 41 of the shaft portion 4. A fitting hole 191 for fitting a protrusion 221 a included in a core member 221 of the contact portion 22 described below is formed on the top surface on the tip side of the screw rod 19.

  The spreading portion 20 is for interrupting the motion transmitting portion 11 and the motion transmitting portion 12 to open the motion transmitting portions 11, 12. In this embodiment, the outer diameter dimension is larger than the diameter of the screw rod 19. Has a substantially hemispherical shape. Further, the outer diameter dimension of the expanding portion 20 is the same as the maximum distance of the region formed between the opposing surfaces of the motion transmitting portions 11 and 12 in the normal state by the biasing force in the opening direction of the arm portions 7 and 8. Or larger.

  The adapter 21 is a well-known adapter for attaching to the tip of a shared operation rod (not shown) for an indirect hot-wire tool, and its configuration will be described below. The adapter 21 has a bottomed hole portion 211 into which the head constituting the connecting portion of the common operation rod can be inserted along the axial direction from the lower end side. The hole 211 is formed with two slits 212 (one of which is not shown) at a position so as to be a substantial target with the center of the hole 211 as a reference. The slits 212 extend from the opening end of the hole 211 along the axial direction of the hole 211 to the middle thereof (the same dimension as the lower end of the connection portion of the common operation rod to the projection) and then the hole 211. It has a substantially T-shape extending toward both sides in the radial direction. That is, the slit 212 includes a slit part 212 a extending along the axial direction of the hole 211 and a slit part 212 b extending along the radial direction of the hole 211.

  With such a configuration of the adapter 21 and the connection portion of the common operation rod (not shown), the side protrusion on the head of the common operation rod is passed through the slit portion 212a of the slit 212 and the common operation is performed on the slit 212 of the adapter 21. By inserting the head of the connecting portion of the rod and rotating the common operation rod or adapter 21, the side protrusion of the head of the common operation rod fits into the recess of the slit portion 212 b of the adapter 21. Attached to the tip of the common operation stick.

  As shown in FIG. 1, the contact portion 22 is separate from the screw rod 19, and as shown in FIG. 4, the contact portion 22 includes a core member 221 and a contact portion main body 222. The core member 221 is composed of a protruding portion 221a and a flat plate portion 221b having a disk shape, for example, and the protruding portion 221a is inserted into the fitting hole 191 of the screw rod 19 to be fitted, The screw rod 19 rotates together with the screw rod 19. The contact portion main body 222 is formed of a relatively non-slip material such as rubber, for example, like the contact portions 71 and 81 of the arm portions 7 and 8, and the flat plate portion 221b and the projection portion 221a of the core member 221. It has the hollow part 223 which can surround a part by the side of the flat plate part 221b. However, since the recess 223 is not in contact with the core member 221, the rotation of the core member 221 is not transmitted to the contact portion main body 222 via the inner surface of the recess 223.

  Based on the above configuration, the operation of the clamping tool 1 will be described below. First, from a state in which the screw rod 19 (the screw rod 19 from which the contact portion 22 is removed if the diameter of the contact portion 22 is larger than the screw hole 41) is inserted into the screw hole 41 of the shaft portion 4 of the clamping member 2; The screw rod 19 is rotated so that the amount of protrusion from the shaft portion 4 at the tip of the screw rod 19 increases. As a result, as shown in FIG. 5, the spreading portion 20 abuts against the mutually facing surfaces of the distal end portions 111 and 121 of the motion transmitting portions 11 and 12 and moves toward the shaft portion 4 side. In order to push the space between the distal end side portion 111 and the distal end side portion 121, the motion transmitting portions 11 and 12 are opened, and accordingly, the arm portion 7 and the arm portion 8 swing around the shaft portion 4. Move in the direction of closing. Further, when the screw rod 19 is rotated so that the protruding amount of the tip of the screw rod 19 from the shaft portion 4 is further increased, the spreading portion 20 is moved from the tip side portions 111 and 121 of the motion transmitting portions 11 and 12 to the base. Since it moves to the end side parts 112 and 122 and abuts against the mutually opposing surfaces of the base end side parts 112 and 122, it moves between the base end side part 112 and the base end side part 122 this time. Since it pushes and spreads, the operation | movement which the operation | movement transmission parts 11 and 12 open, and the operation | movement which closes the arm parts 7 and 8 by extension is continued.

  And when the expansion part 20 moves to the axial part 4 side from the front end side parts 111 and 121 of the motion transmission parts 11 and 12 to the base end side parts 112 and 122, the front end side parts 111 and 121 face each other. Since the surface is inclined at a steeper angle with respect to the axis connecting the shaft portion 4 and the screw rod 19 than the surfaces of the proximal end portions 112 and 122 facing each other, the screw rod 19 is rotated. Even if the amount of movement of the spreader 20 is the same, the spreader 20 is more distal than the distal portion 111, 121 than when the spreader 20 moves between the proximal portions 112, 122 and spreads. The pushing force transmitted from the pushing and spreading unit 20 to the motion transmitting units 11 and 12 becomes larger when the gap is moved and spread.

  On the other hand, when the spreading portion 20 is in a state of being separated from the shaft portion 4 more than the distal end side of the distal end portions 111 and 112 of the motion transmitting portions 11 and 12, the arm portions 7 and 8 are mutually connected by the coil spring 17. Since the arm portions 7 and 8 are opened in a direction away from each other with the release from the pressing force by the pushing and expanding portion 20 because they are biased in the separating direction, the motion transmitting portions 11 and 12 are also Oscillates around the shaft 4 and moves in the directions close to each other to close.

  However, when the columnar standing body P is clamped by the clamping tool 1, the arm unit 7 is operated by operating the clamping tool 1 attached to the tip of the common operation rod from below the columnar standing body P. 8 is made to be located on both sides in the radial direction of the columnar standing body P, and then the common operating rod is rotated to rotate the operating member 3 so that the expanding portion 20 and the screw rod 19 are also rotated. Let

  At the stage where the spreading portion 20 moves while rotating toward the shaft portion 4 in a manner to spread between the distal end side portions 111 and 112 of the motion transmitting portions 11 and 12 of the clamping member 2, the arm portions 7 and 8 are moved. Closes at a relatively high speed, so that the portion of the columnar standing body P to be sandwiched can be quickly surrounded. And the contact part 22 which has the front-end | tip of the screw rod 19 protrudes from the axial part 4 toward the columnar standing body P side.

  Further, even when the operation member 3 is rotated by rotating the common operation rod at the same speed, the pushing and spreading portion 20 spreads between the proximal end portions 112 and 122 of the motion transmitting portions 11 and 12 of the clamping member 2. At the stage of moving while rotating toward the shaft portion 4 side, the contact portion 22 at the tip of the screw rod 19 protrudes from the shaft portion 4 at the same speed toward the columnar standing body P, while the arm portion 7 and 8 close at a relatively slow speed, so that the abutting portions 71 and 81 of the arm portions 7 and 8 also approach the columnar standing body P slowly.

  Then, when the operation member 3 is further rotated by rotating the common operation rod at the same speed, the contact portions 71 and 81 of the arm portions 7 and 8 and the contact portion 22 of the screw rod 19 as shown in FIG. Are in contact with the side surfaces of the columnar standing body P, and the columnar standing body P is tightened by the contact portions 71 and 81 of the arm portions 7 and 8 and the contact portion 22 of the screw rod 19. Is determined to be insufficient, the common operation rod is rotated at the same speed, and the operation member 3 is further rotated. Also in this case, since the expanding portion 20 moves between the proximal end portions 112 and 122 of the motion transmitting portions 11 and 12 of the holding member 2, the movement of the arm portions 7 and 8 becomes gentle. . Therefore, it is possible to finely adjust the tightening of the columnar standing body P by the contact portions 71 and 81 of the arm portions 7 and 8 and the contact portion 22 of the screw rod 19 so as to be optimized. When the above steps are completed, the common operation bar may be removed from the adapter 21 of the clamping tool 1 by operating the common operation bar.

  Further, when the common operation rod is reversely rotated and the operation member 3 is also reversely rotated, the spreading portion 20 and the screw rod 19 are also reversely rotated. Therefore, the contact portion 22 of the screw rod 19 is a column-like standing body. The arm portions 7 and 8 are moved by the urging force of the coil spring 17 when moving away from P and when the spreading portion 20 is at least separated from the distal ends of the distal end portions 111 and 121 of the motion transmitting portions 11 and 12. It opens, and the space | interval of the front-end | tip of the arm parts 7 and 8 becomes larger than the diameter dimension of the columnar standing body P, and it releases from the state which the arm parts 7 and 8 surrounded the columnar standing body P about the clamping tool 1 It becomes possible to do.

  Even when the diameters of the portions to be clamped by the columnar standing body P are different, the three points of the contact portions 71 and 81 of the arm portions 7 and 8 and the contact portion 22 of the screw rod 19 are the same. The position of contact with the columnar erected body P is such that the common operation rod is rotated to rotate the operation member 3, and thus the spreader 20 and the screw rod 19, and the three contact portions 71, 81, and 22 are set. It is possible to cope with this by adjusting the size and diameter of the circular orbit passing therethrough so as to match the size and diameter of the circular orbit of the portion to be clamped by the columnar standing body P.

  Next, an example of a method of attaching the protective sheet 24 to the columnar standing body P using the clamping tool 1 will be described with reference to FIG. The protective sheet 24 used in this method is thin and flexible, and has a plurality of annular portions 241 for passing the arm portions 7 and 8 (three in each arm portion 7 and 8 in this embodiment). It has been provided. First, the clamping tool 1 in a state where the arm portions 7 and 8 are passed through the annular portion 241 of the protective sheet 24 is attached to the columnar standing body P by the above-described method of clamping the columnar standing body P. As a result, the protective sheet 24 suspended from the arm portions 7 and 8 of the clamping tool 1 is erected from the arm portions 7 and 8 so as to substantially surround the entire circumference along the side surface of the columnar erected body P. The body P is suspended in the axial direction. Next, the clamping tool 1 to which the protective sheet 24 is not attached is attached to the columnar erected body P by the method of clamping to the columnar erected body P described above. At this time, the clamping tool 1 is provided with a columnar erection at a lower part of the protective sheet 24 in the axial direction of the columnar erected body P in order to press the protective sheet 24 from the radially outer side of the columnar erected body P. It is attached to the body P. Therefore, the protective sheet 24 is held on both sides in the axial direction with respect to the columnar standing body P by the two clamping tools 1, and the upper side of the protective sheet 24 is attached to the annular portion 241 on the arm portion 7 of the clamping tool 1, Therefore, the protective sheet 24 can be prevented from dropping from the columnar standing body P even when a strong wind is blown or a tool or the like is held by a worker.

  Then, when the protective sheet 24 is attached to the columnar standing body P using the clamping tool 1, as shown in FIG. 9, the plurality of electric wires 26 intersect and come close to the insulator 27 and the retaining clamp 28. In such a place, when the protective sheet 24 surrounds the side surface of the utility pole as the columnar standing body P, the protective sheet 24 is hung on the electric wire 26 and the protective sheet 24 and the electric wire 26 are sandwiched between the sheet scissors 25. good.

  Furthermore, the arm portions 7 and 8 of the clamping tool 1 not only pass the annular portion 241 of the protective sheet 24 but also pass the work bag string to suspend the work bag from the arm portions 7 and 8 (not shown). Anyway, it is good.

DESCRIPTION OF SYMBOLS 1 Tool for clamping 2 Clamping member 3 Operation member 4 Shaft part 41 Screw hole 7, 8 Arm part 71, 81 Contact part
9, 10 connecting portion 11, 12 motion transmitting portion 111, 121 distal end portion 112, 122 proximal end portion 17 coil spring 19 screw rod 20 spreading portion 21 adapter 22 abutting portion 24 protective sheet 241 through portion 25 sheet scissors B box Body P Column-shaped standing body S Space

Claims (4)

The first and second arm portions having contact portions that contact the side surfaces of the columnar standing body, and the direction in which the contact portions relatively approach the first arm portion and the second arm portion. First and second connecting portions that are provided at end portions of the first connecting portion and connected via a shaft portion, and the first and second connecting portions from the first and second connecting portions, Extending in different directions, and moving the contact portions of the first and second arm portions in relatively close directions by moving the extending direction ends in directions away from each other. A clamping member provided with two motion transmission parts;
A screw rod capable of projecting from the shaft portion between the first arm portion and the second arm portion by being inserted into a screw hole provided in the shaft portion; and the screw Provided at the other end of the rod, and as the projecting amount of the screw rod from the shaft portion increases, it enters between the first and second motion transmitting portions and makes the first and second motion transmitting portions relative to each other. And an operation member having an abutting portion that abuts against the columnar standing body at one end of the screw rod. Nipping tool.   The clamping tool according to claim 1, wherein the first and second arm portions of the clamping member are biased in a direction in which the abutting portions are separated from each other. The first and second motion transmission portions of the clamping member include a distal end side portion disposed on the distal end side in the extending direction of the first and second motion transmission portions, and the first and second motion transmission portions. Each having a proximal side portion disposed on the side of the shaft portion from the distal side portion of the extending direction of the portion,
The surfaces of the distal end side portion of the first motion transmitting portion and the distal end side portion of the second motion transmitting portion facing each other are the base end side portion of the first motion transmitting portion and the second motion. It is greatly inclined toward the opposite side of the shaft portion with respect to an axis line connecting the shaft portion and the screw rod with respect to a surface facing the base end side portion of the transmission portion. The clamping tool according to claim 1 or 2. A method of attaching a protective sheet in which a plurality of the clamping tools according to claim 1 to 3 are used,
One of the clamping tools has a thin and flexible insulating protective sheet attached in advance, and after the clamping tool to which the protective sheet is attached is attached to the side surface of the columnar standing body, the protective sheet A method for attaching a protective sheet, comprising attaching the other clamping tool to a side surface of the columnar standing body above a lower end along the axial direction of the columnar standing body.

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