JP2008178277A - Protective tube installation tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact and lightweight protective tube installation tool having excellent workability without requiring a large force and capable of simply installing a protective tube on an electric wire, while preventing the rocking and vibration of the electric wire in an indirect live line work using an indirect live line gripping tool. <P>SOLUTION: The protective tube installation tool for installing a cylindrical protective tube with a split part cut in the length direction on the electric wire includes: a pinching part constituted by a pair of pinching pieces respectively mounted on the tips of two gripping pieces of the indirect live line gripping tool and pinching the electric wire; and a protective tube opening guide part provided on the outer surface of the pinching part for opening the protective tube from the split part thereof and regulating the moving direction of the protective tube so as to approach the electric wire pinched by the pinching part at an acute angle. The protective tube opening guide tube preferably includes: a strut part; and a guide part supported by the strut part with respect to the stringing direction of the pinching part at the acute angle and regulating the moving direction of the protective tube by being inserted inside the protective tube. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a protective tube mounting tool used for mounting a protective tube on an electric wire by an indirect hot wire operation.

  Conventionally, in overhead power lines, it is possible to prevent electric shock by touching the wires during construction work or damage to the wires themselves, and to prevent the presence of wires that should not be touched before construction work. In order to make it easy to recognize and draw attention, a cylindrical protective tube is attached to the electric wire. When such a protective tube is attached to an electric wire, it is known to use a protective tube desorption device.

  This protective tube desorption device is a large-scale device equipped with a hydraulic motor, and when it is necessary to protect a long distance electric wire, the protective tube is connected and the electric wire is inserted into the interior to make it an interior state. It is. Since the work for attaching the protective tube to the electric wire is normally performed in a live line state, it is necessary to ensure insulation between the workers, and therefore the protective tube attaching / detaching device is ensured to have insulation. It is used by being attached to the tip of the operating rod (see, for example, Patent Documents 1 and 2).

  However, as an electric wire that needs to be protected by being inserted into a protective tube, in addition to the above case, for example, an edge portion that is slackened so that tension is not applied to the electric wire in a column that suspends a pole transformer, etc. There are cases where it is necessary to protect the high-pressure underline and the high-pressure underline by attaching a protective pipe by indirect hot-line work. In such a case, it is difficult to use such a large protective tube detaching device as described above, and there is a case where electric wires are complicated so that a working space cannot be secured and the device cannot be used. Moreover, when the load of a heavy apparatus like a protective tube removal | desorption apparatus is applied to the electric wire of an edge line part, there exists a possibility of a disconnection etc.

  Therefore, a protective tube having a simple structure is attached to the electric wire such as the edge line portion. The protective tube 60 is made of a highly flexible material and has a bellows-like cylindrical shape that is freely bent. A split portion 60a for inserting an electric wire in the length direction is cut into the outer peripheral surface of the protective tube 60. (See FIG. 8). Further, leg portions 61 and 61 are formed outwardly in the normal direction in order to ensure insulation from the electric wires W inserted into the protective tube 60 at both edges of the protective tube 60 facing each other in the split portion 60a. Yes. And the expansion assistance tool shown in FIG. 7 is known as a tool which mounts such a bellows-shaped protection tube 60 on the electric wire W (refer patent document 3).

  The expansion assisting tool 70 is formed to include an insertion part 71 and a handle part 72, and is cut out from one plate-like material, for example, a cylindrical resin material, or deformed, or a resin It is produced by molding or the like. The insertion portion 71 includes a distal end portion 71a formed narrower than the opening at the end of the protective tube, an inclined portion 71b that gradually expands on both sides continuously from the distal end portion 71a, and an inclined portion 71b. And a rear end portion 71c formed such that both continuous sides are wider than the opening at the end portion of the protective tube and parallel to the length direction, and each of these portions is a plate body that is curved at right angles to the direction. A sandwiching portion 72 having an area that can be gripped from the rear end portion 71 c is bent to the outer surface side of the insertion portion 71. The expansion assisting tool 70 is inserted into the opening of the end portion of the protective tube 60 from the distal end portion 71a side of the insertion portion 71, and used to hold the split portion 60a of the end portion in an expanded state. Is. However, with the use of this expansion assisting tool 70, an electric wire can be easily inserted into the end portion of the protective tube using a gripping tool. It was necessary to push in the electric wire while applying a very large force in a direction perpendicular to the axial direction to expand the split portion 60a of the protective tube.

  Therefore, an insertion assisting tool has been used in combination with the expansion assisting tool so that the electric wire can be pushed into the protective tube without requiring such a large force (see Patent Document 3). FIG. 8 is a view schematically showing a situation in which a protective tube is attached to an electric wire by using this insertion aid and the expansion aid together. As shown in this figure, this insertion assisting tool 75 has roller members 77 on both side surfaces of a clip-shaped main body member 76 having two knob portions 76 a and 76 b, and outwardly at one end of the main body member 76. It has a structure having a sandwiching portion 78 extending in the direction.

This insertion assisting tool 75 is normally used as follows. In a state where the grip portions 76a and 76b of the clip-shaped main body member 76 are grasped and spread with a gripping tool such as a Yatco (see FIG. 9), the insertion assisting tool 75 is brought close to the wire W to grip the wire W. Then, the protective tube 60 in which the expansion assisting tool 70 is inserted in the opening of the end portion in advance and the split portion 60a is expanded is brought close to the insertion assisting device 75, and the insertion assisting device is inserted into the expanded end portion. 75 pinching portions 78 are interrupted. By sliding and moving the protective tube 60 in the direction of the arrow in the drawing in a state where both side edges of the split portion 60a of the protective tube 60 are in contact with the roller members 77 on both sides of the insertion assisting device 75, the insertion assisting device 75 is moved. The gripped electric wire W is inserted into the protective tube 60.
JP 2000-197225 A JP 2003-47115 A JP 2005-318784 A

  However, when a protective tube is attached to an electric wire using the above insertion aid and expansion aid together, the wire is swung by wind or the like, and the protective tube attached with these auxiliary tools is moved to When trying to attach to an electric wire, there was a problem that the electric wire was shaken and it was difficult to perform the attaching operation.

  Also, soft wires such as high-voltage cutout lead wires (EP rubber wires) and other high-voltage underwires are prone to wrinkles, and when these wires are wrinkled, the two types of auxiliary tools can be used. There is a problem that it is difficult and time-consuming to attach the protective pipe to the electric wire, and in the worst case, the worker has to perform the work of installing the protective pipe directly by hot-wire work.

  Therefore, in order to solve the above-mentioned problems, the present invention does not require a large force while preventing the swinging or swinging of the electric wire in the indirect hot wire operation, and the workability is good, and a protective tube is easily provided on the electric wire. An object is to provide a small and lightweight protective tube mounting tool that can be mounted.

  The object is, according to the present invention, a protective tube mounting tool used for mounting a cylindrical protective tube having a slit portion cut in a length direction to an electric wire by indirect hot wire operation, It comprises a pair of clamping pieces each attached to the tip of two gripping pieces of a live wire gripping tool, is provided on a clamping part for clamping the electric wire, and on the outer peripheral surface of the clamping part, and the protective tube is divided into its split parts And a protective tube expanding guide portion for restricting the moving direction of the protective tube so as to approach the electric wire held by the holding portion at an acute angle. Achieved.

  The protective tube expansion guide part is not limited in its structure as long as it has the above function, but the support part standing on the outer peripheral surface of the holding part and the holding part at the tip of the supporting part by the holding part A structure provided with a guide portion supported at an acute angle with respect to the electric wire to be sandwiched is preferable. In this case, the guide unit is inserted into the protective tube and moves the protective tube relative to the electric wire so as to regulate the moving direction of the protective tube so that the guide tube approaches an acute angle to the electric wire. Function. Moreover, it is this guide part or support | pillar part, or these that expands the said protection pipe | tube from the split part. In addition, when the protective tube mounting tool of the present invention is attached to the gripping tool, the protective tube expanding guide portion is a portion of the outer peripheral surface (two gripping portions) that is the distal end side in the length direction of the gripping tool in the clamping portion. It can be suitably provided in a portion excluding the inner portion surrounded by these and surrounded by these. In the present specification, the “tip side” is used in this sense hereinafter.

  When the guide portion is used to widen the split portion of the protective tube, the guide end portion has a width in a direction perpendicular to the moving direction of the protective tube and the insertion end portion formed narrower than the opening of the protective tube end portion. Comprises a wide portion that is wider than the opening, and both sides extending from the insertion end portion to both sides in the movement direction of the protective tube are configured by plate-like bodies that are gradually widened toward the wide portion. preferable. The wide portion can be provided at any position along the moving direction of the protective tube from the vicinity of the insertion end to the rear end in the guide portion. Specifically, the plate-like body is formed in a triangular shape, a streamline shape, an elliptical shape, a parabolic shape (secondary curve shape) or the like from the wide portion toward the insertion end portion, and has a generally rhombus shape as a whole. A planar shape such as an elliptical shape or a substantially bullet shape may be provided. Further, the edge portions of the both sides with the front and back surfaces can each be subjected to processing such as chamfering. Note that the thickness of the plate-like body can be set as appropriate.

  By configuring the guide portion in this way, when the protection tube is moved relative to the electric wire so that the guide portion is inserted into the opening end of the protection tube from the insertion end portion, the guide portion is The movement direction of the protective tube is regulated so as to approach the electric wire at an acute angle, and the wide wall portion pushes the tube wall that is easier to deform than the split portion of the protective tube from the inside toward the outside, and The protective tube can be expanded from its split. Further, by moving the protective tube relative to each other, the protective tube approaching the electric wire comes into contact with the outer peripheral surface of the electric wire from the expanded split portion, and further attempts to move relative to the electric wire at an acute angle. Therefore, the electric wire can be inserted into the protective tube with a smaller force than in the case where the protective tube is attached to the conventional electric wire.

  The wide portion further has a width in a direction perpendicular to the moving direction of the protective tube approximately equal to a length obtained by adding the outer diameter of the electric wire to the diameter of the opening of the protective tube end portion, or wider than that. It is more preferable that a large part is included. As a result, the protective tube approaches the electric wire in a state in which the split portion is further expanded to the same extent or more than the outer diameter of the electric wire, so that the electric wire can be inserted into the protective tube with a smaller force.

  The strut portion has a sharp end provided on the insertion end portion side of the guide portion toward the opening direction of the holding portion or the moving direction of the protective tube, and the opening direction of the holding portion from the end portion or the It is preferable to provide both side surfaces that are curved and extend to both sides in the moving direction of the protective tube. Thereby, when the protection tube is moved relative to the electric wire, it is possible to prevent a problem that the protection tube cannot move because the split portion or the leg portion at the opening end of the protection tube is caught by the support column.

  When the splitting portion of the protective tube is thereby expanded, the distance between the both side surfaces in the direction perpendicular to the opening direction of the clamping portion or the moving direction of the protective tube is the wire. It is preferable to provide a portion that is approximately the same as or larger than the outer diameter of. By providing such a part in the support column, the split part of the protective tube is approximately equal to the outer diameter of the electric wire in the same manner as the wide part (maximum width part) of the guide part or in synergy with this. Since it can be expanded as described above and moved relative to the electric wire in this state, the electric wire can be easily inserted into the protective tube from the expanded split portion.

  Further, the protective tube expanding guide part is divided into two parts by a dividing surface that cuts vertically along the opening direction of the clamping part, and each of the divided parts is a tip side on the outer peripheral surface of the pair of clamping pieces. It can also be provided in each side edge region. Each of the divided parts may have a mirror image relationship or may not have a mirror image relationship.

  The protective tube mounting tool of the present invention can be directly clamped at an arbitrary position near the location where the protective tube of the electric wire is to be mounted by the clamping portion with the gripping tool attached thereto, and the gripping tool is fixed in this state. By doing so, the electric wire can be prevented from shaking, so that it becomes easy to perform the work of attaching the protective tube to the electric wire by the indirect hot wire operation. In addition, the protective tube mounting tool of the present invention allows the protective tube to be inserted into the protective tube expansion guide portion provided in the tool and moved relative to the electric wire so that the electric wire is brought close to the electric wire in the expanded state. Since the electric wire can be inserted from the split part, the protective tube does not require a large force to install the protective tube, as in the case where the electric wire is pushed perpendicularly to the direction of the tube axis. Therefore, workability is improved. Furthermore, since the protective tube mounting tool of the present invention is itself small and lightweight, it is easy to handle the tool.

  Next, an embodiment of the protective tube mounting tool of the present invention will be specifically described with reference to the accompanying drawings. FIG. 1 is a perspective view showing an example of an embodiment of a protective tube mounting tool of the present invention, and FIG. 2 is a front view (FIG. 1 (a)) and a side view (FIG. 2) of the protective tube mounting tool in FIG. (B)). Here, a front view means the figure seen from the overhead line direction of the electric wire clamped by the clamping part in embodiment. In the following description, “up and down” means up or down in the drawing.

  The protection tube mounting tool 1 according to the present embodiment is provided on a holding portion 2 including a pair of holding pieces 21 and 23 for holding an electric wire, and an outer peripheral surface of the holding pieces 21 and 23, for example, as shown in FIG. The bases 3 and 3 formed in a box shape so that the two gripping pieces 51 and 52 of the tool 50 are respectively fitted and accommodated, and the upper side of the base 3 of the clamping piece 23 (the protective tube mounting tool 1 of the present invention is used). And a protection tube expansion guide portion 4 erected on the outer peripheral surface of the gripping tool 50 when it is attached to the gripping tool 50. In addition to the position shown in the drawing, the protective tube expansion guide 4 may be provided on the outer peripheral surface of the holding piece 21 in addition to the upper side edge region and the base 3 in the holding piece 23. This installation position can be appropriately determined in consideration of workability and the like.

  The pair of sandwiching pieces 21 and 23 in the sandwiching portion 2 is formed by using a part of the opposing cylindrical wall of the cylindrical body having an inner diameter substantially equal to or slightly larger than the outer diameter of the electric wire to be sandwiched. Each of them is cut out with a predetermined width along the opening direction to form a substantially semi-cylindrical shape. The length and thickness of the sandwiching pieces 21 and 23 in the opening direction (coincident with the opening direction of the cylindrical body) are not particularly limited and can be set as appropriate. The inner peripheral surfaces 21a and 23a should not have protrusions that damage the outer covering of the electric wire held between them, and both end edges in the tube axis direction of the inner peripheral surfaces 21a and 23a are chamfered. It is preferable not to be damaged even when the electric wire is bent. The sandwiching pieces 21 and 23 are not limited to the outer shape of the semi-cylindrical body as described above, and other outer shapes may be used as long as they have an inner peripheral surface capable of contacting the outer periphery of the electric wire. The provided member can also be used.

  The bases 3 and 3 include box-shaped members 31 and 34 that extend from the outer peripheral surfaces of the pair of sandwiching pieces 21 and 23 in the substantially same direction toward the outside at right angles to the opening direction of the sandwiching pieces 21 and 23, respectively. Openings are provided on the free end faces of the box-shaped members 31 and 34 toward the outside, and storage chambers 33 and 36 for receiving and holding the two gripping pieces 51 and 52 of the gripping tool are provided therein. When the tips of the two gripping pieces 51 and 52 of the gripping tool are fitted and accommodated in the side walls of the box-shaped members 31 and 34, respectively, the tip ends of the two gripping pieces 51 and 52 are respectively drilled. Screw holes 32 and 35 are formed at positions corresponding to through holes (not shown). The leading ends of the two gripping pieces 51 and 52 from the openings are fitted and accommodated in the accommodating chambers 33 and 36, respectively, and bolts (not shown) are screwed into the screw holes 32 and 35, so that the protective tube of the present invention is used. The mounting tool 1 is attached to a gripping tool. By operating the gripping tool in this state, the holding pieces 21 and 23 approach or separate from each other, whereby the holding pieces 21 and 23 can hold or release the electric wire.

  Note that the bases 3 and 3 are not limited to the box-shaped members as described above, and for example, protruding pieces or the like that protrude from the outer peripheral surfaces of the respective holding pieces can be used. In this case, the bases 3, 3 and the tips of the gripping pieces 51, 52 of the gripping tool are used to fix fixtures such as bolts using through holes formed in the tips of the gripping pieces 51, 52. And can be fixed in the same manner as described above. In addition, the bases 3 and 3 are not limited to the mode of being fixed to the outer periphery of each of the sandwiching pieces 21 and 23 as described above. For example, the sandwiching pieces 21 and 23 are attached to the respective bases by a known means such as a shaft support. And may be fixed so as to be rotatable.

  As shown in FIG. 1 and FIG. 2, the protective tube expansion guide 4 in the present embodiment includes a support column 40 erected on the outer peripheral surface of the clamping piece 23 and the opening direction of the clamping piece 23 at the tip thereof. And a guide portion 44 fixed at an acute angle.

  The support column 40 has a sharp end 40a on the side where the protective tube is inserted (hereinafter referred to as the protective tube insertion side), and bends from the end to both sides of the protective tube along the moving direction of the protective tube. Both side surfaces 40b and 40c extending in the direction are provided, and a cross section in a direction perpendicular to the standing direction of the support column 40 has a substantially ship shape. The support | pillar part 40 may contain the part from which the distance of the direction orthogonal to the said direction between these both side surfaces 40b and 40c becomes the maximum.

  The guide portion 44 is a plate-like body having a substantially rhombic planar shape, is provided on the protective tube insertion side, and has an insertion end portion 44a formed narrower than the opening of the protective tube end portion, and a protective tube A maximum width portion 44b having a maximum width in a direction orthogonal to the direction along the moving direction is provided. Both sides extending from the insertion end portion 44a to both sides in the movement direction of the protective tube are continuously widened toward the maximum width portions 44b and 44b, and are wider than the opening of the protective tube (wide portion). On the contrary, the widths of both sides are continuously reduced from 44b to the rear end in the direction. The maximum width of the maximum width portion 44b is set to be equal to or longer than the inner diameter of the opening of the protective tube end portion inserted into the guide portion 44 plus the outer diameter of the electric wire held by the holding portion 2. By providing the guide portion 44 with the maximum width portion 44b in this manner, the guide portion 40 can be moved as the guard pipe is moved relative to the electric wire so that the split portion of the guard pipe inserted into the guard pipe expanding guide portion 4 moves. The end of the protective tube approaches the electric wire at an acute angle in the state where the split portion is expanded in this way, so that a large force is not required and the electric wire is expanded at the end of the protective tube. Can be inserted from.

  FIG. 3 is a perspective view showing another example of the embodiment of the protective tube mounting tool of the present invention. 4 shows a front view (in the drawing, (a)) and a side view (in the drawing, (b)) of the protective tube mounting tool of the embodiment shown in FIG. In the protective tube mounting tool 1 shown in these drawings, the protective tube expansion guide portion 4 is divided by a split surface that longitudinally cuts the center along the opening direction of the sandwiching portion 2, and is divided into two pieces (hereinafter referred to as mirror images). These are different from the previous embodiment in that they are provided in the side edge region on the distal end side of the outer peripheral surface of the pair of sandwiching pieces 21 and 23, respectively. is doing. Other configurations are essentially the same as those in the above embodiment.

  Each of the protection pipe expanding guide member pieces 4a and 4b is a column piece piece erected on the side edge region of the outer peripheral surface of the two holding pieces 21 and 23 of the holding part 2 facing the bases 3 and 3, respectively. 41 and 42, and guide part pieces 45 and 46 supported by these column part parts 41 and 42 at an acute angle with respect to the opening direction of the clamping part 2, respectively.

  The columnar pieces 41 and 42 are symmetrical with each other along the center line in the major axis direction (direction parallel to the opening direction of the holding unit 2) of the columnar column 40 having a substantially ship-shaped cross section shown in the above embodiment. Are divided into two so that flat dividing surfaces 41b and 42b along the opening direction of the sandwiching portion 2 and curved surfaces 41a and 42a bulging outward in a direction perpendicular to the direction are provided. The rear side surfaces 41c and 42c are provided on the rear side in the opening direction of the sandwiching portion 2 as side surfaces. Moreover, the front end surface of each support | pillar part piece 41 and 42 is equipped with the front end surface which inclined so that height might become low gradually toward the back side from the opening direction front side of the clamping part 2. As shown in FIG.

  Further, as shown in FIG. 5, the guide pieces 45 and 46 are obtained by dividing a plate-like body having a substantially elliptical planar shape into two along its major axis, and each of them is a support piece piece. 41 and 42 are respectively fixed to the inclined tips. These support | pillar part pieces and guide part pieces (41 and 45, 42 and 46) can be fixed by well-known methods, such as welding and joining using a predetermined | prescribed fixing tool. Moreover, these support | pillar part piece and guide part piece may be integrally molded by the well-known method.

  In the protection tube mounting tool 1 according to the present embodiment, a pair of clamping pieces 21 and 23 each having protection tube expansion guide portions 4a and 4b are provided via base portions 3 and 3 provided on the outer peripheral surfaces thereof. The fixed grip piece 51 and the movable grip piece 52 of the grip tool are respectively attached to the tips of the grip tool. By operating the operating lever of the gripping tool in this state, the other gripping piece attached to the tip of the movable other gripping piece 52 with respect to the one gripping piece (21 or 23) attached to the tip of the fixed gripping piece 51. The piece (23 or 21) rotates in the approach direction or the separation direction.

  In this embodiment provided with such a protective tube expansion guide part 4, when the electric wire is clamped by the clamping part 2, the protective tube expansion guide part pieces 4 a and 4 b abut against each other so that the two are in contact with each other. You may be in the state which contact | adhered and depending on the outer diameter etc. of the electric wire pinched | interposed, you may be in the state which produced the clearance gap between both slightly. In the latter case, there is a possibility that the leg portion of the end portion of the protective tube is caught on the end portion of the support portion pieces 41, 42 on the protective tube insertion side. In this case, guidance in the protective tube expanding guide portion pieces 4a, 4b is possible. The wide portions (or the maximum width portions 45b and 46b) of the pieces 45 and 46 are formed close to the insertion end, and the movement tube moves in the direction of the protection tube. The end of the protection tube is the support piece (41 and 42). Such a problem can be prevented by expanding the protective tube from the split portion before reaching the end of the tube.

  Each part of the protective tube mounting tool 1 of the present invention as described above can be formed by cutting a known metal or the like, but from the viewpoint of workability, the protective tube mounting tool 1 of the present invention itself. In order to reduce the weight, it is preferable to use a known light metal such as aluminum.

  The gripping tool to which the protective tube mounting tool 1 of the present invention is attached is not particularly limited in its structure and outer shape, and the operation method may be either manual or electric, for example, as shown in FIG. Such a Yatco is preferably used. In this figure, a Yatco 50 includes a pipe-shaped synthetic resin insulating operation rod 54 having a required length, a pair of fixed gripping pieces 51 and a movable gripping member that are assembled to the tip of the rod through a mounting member 53. A piece 52, an insulating operating rod 55 connected to the base end side of the movable gripping piece 52 via a connecting pin 53a, and a substantially U-shaped attachment provided so as to sandwich the outer periphery of the operating rod 54 It is mainly comprised from the substantially lever-shaped operation lever 56 connected with the actuating rod 55 via the connection pin 58a fixed to the member 58. FIG. By operating the operation lever 56, the movable gripping piece 52 is rotated in a direction approaching the fixed gripping piece 51, whereby a gripped object such as a protective tube can be gripped.

  The fixed grip piece 51 and the movable grip piece 52 of the YATCO 50 are usually provided with through holes (not shown) near the tips thereof, so that the protective tube of the present invention can be mounted using these holes. The point which can attach the tool 1 is as above-mentioned.

  Next, with reference to FIG. 6, the usage method of the protection tube installation tool 1 of this invention is demonstrated. In the following, as the protective tube mounting tool 1 of the present invention, the protective tube widening guide portion 4 is the same as the embodiment shown in FIG. 1 except that the protective tube widening guide portion 4 is provided on the outer peripheral surface of the holding piece 21. ing. In addition, a case where a bellows-like cylindrical protection tube 60 is used as a protection tube and this is attached to an electric wire will be described as an example. A protection tube to which the protection tube mounting tool 1 of the present invention can be applied is such a bellows. If the protective tube has a split portion cut in the length direction, the protective tube can be mounted on the electric wire with the protective tube mounting tool 1 of the present invention. . Further, as the gripping tool for attaching the protective tube mounting tool 1 of the present invention, the above-described Yatco 50 is used.

  The protective tube 60 is formed of a flexible material and includes a freely bendable cylindrical bellows-shaped body portion. An electric wire W extends along the length of the outer peripheral surface of the body portion. A slit-like split portion 60a is formed, and leg portions 61, 61 extending outward are provided on both sides of the split portion 60a to ensure insulation from the inserted electric wire W. It has been. Inside the split portion 60a, a flange may be formed so that the protective tube 60 is not easily detached from the electric wire W by wind or the like, and a structure that can be combined with each other may be provided. This protective tube 60 can be used by cutting it to a required length as appropriate according to the length of the electric wire W to which it is attached.

  Each of the pair of clamping pieces 21 and 23 of the clamping part 2 in the protective tube mounting tool 1 of the present invention is provided with the bases 3 and 3 provided on the outer peripheral surface thereof, and the distal ends of the fixed gripping piece 51 and the movable gripping piece 52 of the yatco 50. Each of the gripping pieces 51 and 52 accommodated in the base portions 3 and 3 by fitting bolts 37 and 38 into the screw holes 32 and 35 provided on the side walls of the base portions 3 and 3, respectively. Both the bolts 37 and 38 are fixed by passing the tips of the bolts 37 and 38 through a through hole (not shown) formed at the tip. At this time, either of the holding pieces 21 and 23 may be fixed to the fixed holding piece 51 or the movable holding piece 52. Then, the electric wire W is clamped by operating one of the clamping pieces 21 and 23 to the other by operating the operation lever 56 of the YATCO 50. In addition, in the protection tube mounting tool 1 of the present invention, when the holding pieces 21 and 23 are rotatably fixed to the base portions 3 and 3, the holding pieces 21 and 23 in the direction of the wire W are connected. Can be aligned.

  In this state, after the YTCO 50 is fixed in this state, for example, by fixing the operation end side in the length direction so that the electric wire W does not swing, the protective tube is gripped by using a gripping tool such as a YTKO prepared separately. 60 is brought close to the protective tube expanding guide portion 4 of the protective tube mounting tool 1 of the present invention, and the protective tube 60 is made to be inserted so that the insertion end portion 44a of the guide portion 44 is inserted into the opening at one end portion of the protective tube 60. Plug in. At this time, since the guide portion 44 has sharply formed end portions on the protection tube pushing side of the expansion support portions 41 and 43 outward in a perpendicular direction which is gradually widened along the moving direction of the protection tube 60. The support columns 41 and 43 can be inserted into the split portion 60a of the protective tube 60, and the protective tube 60 is expanded from the split portion 60a by moving the protective tube 60 relative to the electric wire. Go. In addition, since the guide portions 42 and 44 are provided so as to approach the sandwiching portion 2 at the tips of the support columns 41 and 43, the moving direction of the protective tube 60 can be regulated.

  Furthermore, by moving the protection tube 60 relative to the electric wire using a Yatco, the protection tube 60 is further expanded from the split portion 60a, and the guide portions 42 and 44 are most widened at the portions 42b and 44b. In an expanded state, the wire approaches the electric wire W in that state, and the electric wire is naturally inserted into the protective tube from the expanded split portion 60a and accommodated. By continuing this operation, the electric wire W is inserted into the protective tube 60, and the end portion at the beginning of insertion of the protective tube 60 is elastically split by the split portion 60a with the electric wire W inserted. It is closed and the electric wire W is accommodated in the interior state.

  When the protective tube 60 is further moved relative to each other and the protective tube 60 has passed through the protective tube mounting tool 1 of the present invention, the electric wire W is accommodated in the interior state over the entire length thereof. Thereafter, the operation lever 56 of the YATCO 50 is operated to move the movable gripping piece 52, and the pair of clamping pieces 21 and 23 of the clamping unit 2 are opened, thereby releasing the protective tube mounting tool 1 of the present invention from the electric wire W. Can do. Furthermore, when it is necessary to attach a plurality of protective pipes to this electric wire, the same operation as described above is repeated for another protective pipe.

  As described above, by using the protective tube mounting tool of the present invention, the wire can be fixed so as not to shake during the mounting of the protective tube to the wire, and the protective tube is expanded. Since the electric wire can be brought close to the protective tube in a state and can be naturally mounted in the protective tube, a large force is not required, and the protective tube can be efficiently and easily attached to the electric wire. In addition, even after the installation work of the protective tube to the electric wire is completed, it is only necessary to release the gripping tool from the protective tube and the protective tube installation tool of the present invention from the electric wire. There is no need to pull it out of the protective tube and remove it, and it will not touch and damage power distribution equipment such as insulators.

  The present invention is not limited to the embodiment described above, and it is needless to say that various forms can be taken without departing from the technical idea of the present invention.

  The protective tube mounting tool of the present invention is particularly effective when mounting a protective tube to an electric wire that easily swings and swings, such as an edge line portion that is not tensioned in itself or a high-voltage underline in an overhead wireway. Can be used.

It is a perspective view which shows an example of embodiment of the protection tube installation tool of this invention. It is the front view and side view of embodiment which are shown in FIG. It is a perspective view which shows another example of embodiment of the protection tube installation tool of this invention. It is the front view and side view of embodiment which are shown in FIG. It is the figure which looked at the guide part in embodiment shown in FIG. 2 from the direction orthogonal to the surface. It is a figure explaining the use condition of embodiment shown in FIG. It is a perspective view which shows an example of the expansion aid of the conventional protective tube. It is a figure which shows the mounting condition of the protection tube using the conventional expansion assistance tool and insertion assistance tool. It is a figure which shows the Yatsuko as an example of a holding tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Protective tube installation tool 2 Clamping parts 21 and 23 Clamping piece (half cylinder)
21a, 23a Inner peripheral surface 3 Base 31, 34 Box-shaped member 32, 35 Screw hole 33, 36 Holding piece accommodating chamber 4 Guard tube expanding guide portion 4a, 4b Guard tube expanding guide portion 40 Support column 41, 42 Support column Department (divided into two)
41a, 42a Curved surfaces 41b, 42b Dividing surfaces 41c, 42c Rear end surface 44 Guide portion 44a Insertion end portion 44b Maximum width portions 45, 46 Guide portion (divided into two)
45a, 46a Insertion end (divided in two)
45b, 46b Maximum width (divided into two)
50 Grasping tools 51, 52 Grasping piece 60 Protective tube 60a Splitting part

Claims (7)

  A protective tube mounting tool used for mounting a cylindrical protective tube having a slit portion cut in a length direction to an electric wire by indirect hot wire operation, and comprising two gripping pieces of an indirect hot wire gripping tool It is composed of a pair of clamping pieces each attached to the tip, and is provided on the clamping part for clamping the electric wire, and on the outer peripheral surface of the clamping part, and expands the protection pipe from the split part and moves the protection pipe A protective tube installation tool comprising: a protective tube expansion guide portion that regulates a direction so as to approach an acute angle to an electric wire held by the holding portion.   The protective tube spreading guide portion is supported at an acute angle with respect to a support column erected on the outer peripheral surface of the clamping unit, and an electric wire clamped by the clamping unit at a tip of the column unit, The protection tube installation tool according to claim 1, further comprising a guide portion that is inserted into the inside and regulates a moving direction of the protection tube.   The guide portion includes an insertion end portion formed narrower than the opening of the protective tube end portion, and a wide portion where a width in a direction orthogonal to the moving direction of the protective tube is wider than the opening. 3. The protective tube mounting tool according to claim 2, wherein both sides extending from the insertion end portion to both sides in the movement direction of the protective tube are plate-like bodies that are gradually widened toward the wide portion.   The wide part has a maximum width in which the width in the direction orthogonal to the moving direction of the protective tube is substantially equal to or longer than the length obtained by adding the outer diameter of the wire to the inner diameter of the opening of the protective tube end portion. The protective tube installation tool according to claim 2 or 3, comprising a portion.   The column portion has a sharp end on the insertion end side of the guide portion, and both side surfaces extending from the end along the opening direction of the clamping portion or the movement direction of the protective tube in a curved manner on both sides in the direction. The protective tube mounting tool according to any one of claims 2 to 4, further comprising a portion having a maximum distance in a direction perpendicular to the direction between the both side surfaces.   The protection tube installation tool according to claim 5, wherein the distance in the portion where the distance between the both side surfaces is maximum is set to be substantially equal to or larger than the outer diameter of the electric wire.   The protective tube spreading guide portion is divided into two split surfaces that run vertically along the opening direction of the clamping portion, and each of the divided portions is a tip side on the outer peripheral surface of the pair of clamping pieces. The protection tube installation tool according to any one of claims 1 to 6, wherein the protection tube installation tool is provided in each of the edge regions.

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