JP4522230B2 - Expansion aid - Google Patents

Description

  The present invention relates to a spreading aid, and more particularly, to a tool that is used when an electric wire installed in a place where a large-scale device cannot be used is inserted into a protective tube.

Conventionally, in order to prevent electric shocks from being touched or damaging the wires themselves during construction work, the existence of wires that should not be touched before construction work is recognized. In order to make it easier to call attention, a protective tube is put on. 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 requires the protective tube to be attached to the electric wire supplying power while ensuring insulation from the operator. The apparatus main body is attached to (for example, refer patent document 1, 2).
JP 2000-197225 A JP 2003-47115 A

  Such a protective pipe detaching device is a large-scale device equipped with a hydraulic motor, and when it is necessary to protect a long distance electric wire, the electric wire is inserted into the protective tube while connecting the protective tube. It is mainly used for interior decoration.

  However, the electric wires that need to be protected by being inserted into the protective tube are not limited to this. For example, as shown in FIG. 12, a protective tube is also attached to the electric wire D connected to the transformer 102 installed at the upper part of the utility pole 101. It may be necessary to cover and protect. Even in such a case, it is difficult to use a large protective tube detaching device, and there are cases where it cannot be used in a narrow work space. Further, the electric wire D may be broken if a heavy device such as a protective tube desorption device is loaded.

  For this reason, the electric wire D may be manually covered with a protective tube 103 having a simple structure shown in FIG. In this case, since a high voltage also flows through the electric wire D connected to the transformer 102 or the like, it is necessary to wear an insulating protective device when the power supply cannot be stopped. However, it is preferable to realize the operation of covering the electric wire D with the protective tube 103 while ensuring insulation from a remote position, as in the case of the protective tube attaching / detaching device, rather than wearing the protective device for insulation.

  Here, the protective tube 103 has a split portion 105 for inserting the electric wire D cut into the outer peripheral surface, and a flange 107 is formed in the split portion 105. On the other hand, since the length of the electric wire D of the transformer 102 is various, the protective tube 103 is cut to an arbitrary length for use. For this reason, the flange 107 also exists in the split portion 105 of the end portion 103a of the protective tube 103. Excluding this flange 107 requires a great amount of labor. Therefore, there is a possibility that the inconvenience of inadvertent disconnection from the electric wire D may occur.

  For this reason, in order to insert the electric wire D from the end portion 103 a of the protective tube 103 while leaving the flange 107 as it is, the electric wire D has to enter the protective tube 103 by pushing the flange 107 of the split portion 105 separately. . At the end 103a of such a protective tube 103, there is a problem that it is difficult for the electric wire D to enter, and that if the electric wire D is forced to enter, the electric wire D is damaged.

  In short, even when the work of easily covering the electric wire D with the protective tube 103 from a remote position is realized, it is necessary to allow the electric wire D to smoothly enter from the end 103a of the protective tube 103.

  Then, this invention aims at providing the expansion assistance tool which can facilitate the insertion operation | work which covers a protective tube on an electric wire by assisting the operation | work which inserts an electric wire in a protective tube and makes it interior. .

  A first invention of an expansion assisting tool that solves the above-mentioned problem is that a split portion cut in the extending direction of a protective tube formed in a cylindrical shape is expanded so that an electric wire is installed in the protective tube. An expansion aid used for insertion into a state, characterized in that it comprises an insertion portion formed of a plate-like member that is formed larger than the opening at the end of the protective tube and is inserted into the opening. Is.

  In this invention, when the insertion portion is inserted into the opening at the end of the protective tube, the insertion portion is larger than the opening at the end of the protective tube, so that the split portion of the inserted portion is separated and expanded. Is done. Therefore, it is possible to position the electric wire in a gap (space) defined between the split portion at the end of the protective tube and the insertion portion, and to start the operation of inserting the electric wire into the interior of the protective tube. it can.

  In addition to the specific matter of the first invention, the second invention of the expansion assisting tool that solves the above-mentioned problem is that the insertion portion is gradually moved from the tip side narrower than the opening of the end portion of the protective tube. It is enlarged and formed so as to have a rear end side wider than the opening.

In the present invention, when the insertion portion is inserted into the opening of the end portion of the protective tube from the front end side, the split portion is separated from the protective tube as the rear end side wider than the opening of the end portion is inserted. Therefore, the insertion portion can be smoothly inserted into the opening of the protective tube end portion, for example, even at a split portion of the protective tube end portion at a position that is separated and cannot exert a large force when working. It can be easily expanded.
In the first and second inventions, the split portion cut in the extending direction of the protective tube formed in a cylindrical shape is expanded, and the electric wire is inserted into the interior of the protective tube. A widening assisting tool for use in the case where the distal end portion is formed narrower than the opening at the end of the protective tube, the inclined portion where both sides continuous to the distal end gradually expand, And a rear end portion having a width that is wider than the opening of the protective tube and has a width that can be inserted, on both sides that are continuous with the inclined portion, and a plug portion made of a flat plate-shaped plate member that is manufactured. Then, when the insertion portion is inserted into the opening of the protective tube by being relatively moved from the front end side toward the rear end side, the rear end portion together with the front end portion and the inclined portion is inserted into the opening of the protective tube. By inserting a part or more of the whole, the space between the split parts of the protective pipe is expanded and the space between the split parts is expanded. It may be said to define a space for the one side of the plate-shaped member in the end portion of the protective tube.
In this case, it is possible to define a space which is open on one side of the split portion of the insertion portion of the Merged flat plate shape in the opening of the end of the protective tube, the split portion of the protective tube It is possible to easily start the operation of positioning the electric wire in the internal space and inserting the electric wire into the interior of the protective tube.

  In addition to the specific matter of the second invention, the third invention of the spreading aid that solves the above-described problem is characterized in that the insertion portion is arranged in a direction orthogonal to the extending direction from the front end side to the rear end side. It is characterized by being formed into a curved arc shape.

  In this invention, by inserting the insertion part into the opening of the protective tube end so that the arcuate concave shape faces the split part, the gap between the split part and the concave part of the insertion part is more A large gap is defined. Therefore, the electric wire can be positioned more easily in the gap, and the insertion work can be facilitated.

  In addition to the specific matter of the second or third invention, the fourth invention of the expansion assist tool that solves the above-mentioned problem is, on the rear end side of the insertion portion, with respect to the extending direction from the front end side. It is characterized in that parallel sides are formed.

  In the present invention, when the insertion portion is inserted into the opening of the end portion of the protective tube to the rear end side, the parallel sides are positioned on the inner surface of the protective tube. Therefore, the insertion portion does not slip in the direction of detachment due to the force of closing the opening of the protective tube end, and the insertion portion can remain in the opening of the protective tube end.

  In addition to the specific matter of the first invention, the fifth invention of the expansion aid that solves the above-mentioned problem is the maximum in the opening of the end of the protective tube from the front end side to the rear end side. It is characterized by being formed so as to have a uniform outer surface interval larger than the inner surface interval.

  In this invention, when the insertion portion is inserted into the opening of the end portion of the protective tube, the outer surface parallel to the rear end side is positioned on the inner surface of the protective tube. Therefore, the insertion portion does not slip in the direction of detachment due to the force of closing the opening of the protective tube end, and the insertion portion can remain in the opening of the protective tube end.

  In addition to the specific matter of the fifth invention, the sixth invention of the expansion aid that solves the above-described problem is characterized in that the insertion portion is arranged in a direction orthogonal to the extending direction from the front end side to the rear end side. The cross-sectional shape in the orthogonal direction is formed so as to be an incomplete circle having a cutout portion of a semicircle or less.

  In this invention, the insertion portion is inserted into the opening of the protective tube end portion so that the arc-shaped concave shape faces the split portion side (the notch portion is positioned on the split portion side), and thereby the A larger gap is defined between the split portion and the concave shape of the insertion portion. In addition, when the protective tube is cylindrical, it is inserted so that the outer surface of the insertion portion comes into surface contact with the inner surface of the opening, and the opening at the end of the protective tube slides in the direction of separation due to the force of closing. In addition to being able to prevent more reliably, the inner surface of the insertion portion behaves like the inner surface of the protective tube, and the electric wire can be inserted. Therefore, the electric wire can be positioned more easily in the gap, and the insertion work can be facilitated.

  In addition to the specific matters of the sixth invention, the seventh invention of the expansion aid that solves the above problem defines at least a notch portion on the front end side of the front end side and the rear end side of the insertion portion. The edge portion to be formed is formed in an inclined shape or an R shape.

  In this invention, when the insertion portion is inserted into the opening of the protective tube end portion from the distal end side, the split portion of the protective tube end portion is separated (expanded) by being pushed in from the opposite side of the notch portion. The edge portion on the side of the notch portion can smoothly enter the opening of the protective tube end portion by the inclined shape or the R shape. Therefore, the insertion portion can be smoothly inserted into the opening of the protective tube end portion, and it can be easily set in the protective tube end portion and can be prepared to expand the split portion.

  In addition to the specific matter of any one of the first to seventh inventions, the eighth invention of the expansion assist tool that solves the above-mentioned problem is a gripping part that is connected to the insertion part and formed so as to be grippable. The grip portion is bent in the extending direction from the front end side to the rear end side.

  In this invention, the gripping portion that bends with respect to the insertion portion is gripped in a posture that is separated from the extended surface of the protective tube, and the insertion portion is inserted into the opening of the protective tube end portion, or is pulled out from the opening. It can be performed. Therefore, the grip portion does not hinder the work of inserting the electric wire into the protective tube, and the grip portion can be gripped and pulled out from the protective tube without the electric wire becoming an obstacle.

  A ninth invention of a spreading aid that solves the above problems is characterized in that in addition to the specific matters of any of the first to eighth inventions, means for hooking on other tools is provided. is there.

  In the present invention, when using a tool operated from a remote position, the tool can be hooked. Therefore, it is possible to avoid dropping even when it is accidentally dropped.

  According to the present invention, the insertion part can be inserted into the opening of the protective tube end part to separate the split parts, and the electric wire is inserted into the gap between the split parts and inserted. You can start working.

  At this time, when the distal end side is formed to be narrower than the opening at the end of the protective tube, the insertion portion can be easily inserted and expanded into the opening at the end of the protective tube. Moreover, when the insertion part is formed in the curved shape, a large space can be ensured between the split part of the protection tube end part, and the work of inserting the electric wire can be facilitated. This insertion part has parallel sides and outer surfaces, so that it can be prevented from slipping in the direction of detachment, and the insertion part can stay in the opening of the end of the protection pipe. The operation of inserting the electric wire can be performed. By connecting the gripping portion that is bent to the insertion portion, the gripping portion can be gripped and attached to and removed from the opening at the end of the protective tube without obstruction. Furthermore, safety can be ensured by enabling the tool to be operated from a remote position.

  Therefore, the electric wire can be easily entered into the protective tube, and the operation of expanding the space between the split portions of the protective tube and inserting the electric wire into the interior state can be assisted so as to start smoothly. In addition, in the case of a short protective tube, by inserting the plugs at both ends, all of the split parts between the two ends can be expanded, and after the electric wire has entered easily from between the split parts The operation of inserting the electric wire into the interior state can be completed simply by pulling out the insertion portion.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, the best embodiment of the invention will be described with reference to the drawings. 1-3 is a figure explaining 1st Embodiment of the expansion assistance tool based on this invention.

  In FIG. 1 and FIG. 2, the expansion assist tool 40 includes, for example, the protective tube 103 shown in FIG. 13 without stopping power supply to the electric wire D of the transformer 102 installed on the upper part of the utility pole 101 shown in FIG. 12. When performing the work to be covered from a remote position, it is used together with the insertion aid shown in FIGS. 4 to 7 and the grasping tool shown in FIG. 8 to assist the work.

  Here, the protective tube 103 is formed in a bellows-like cylindrical shape in which the body portion 104 can be freely bent. In the extending direction of the outer surface of the body portion 104, a slit-like shape is inserted so that the electric wire D can be inserted. A split portion 105 is formed. Further, on both sides of the split portion 105 of the protective tube 103, a leg portion 106 is formed to extend outward in order to ensure insulation from the electric wire D to be installed. The flange 107 is formed so as not to be easily detached from the electric wire D installed by wind or the like, and has a structure in which they are assembled with each other. Since the length of the electric wire D to be mounted varies widely, the protective tube 103 is used after being cut to an arbitrary length. In the present embodiment, the bellows-shaped cylindrical protective tube 103 is described as an example. However, the present invention is not limited to this, and can be optimally used for an operation in which a simple cylindrical protective tube is covered with an electric wire or the like. Needless to say.

  The expansion assisting tool 40 is formed so as to include an insertion part 41, a gripping part 42, and a hooking string (hooking means) 43, and a single plate-like material, for example, a cylindrical resin material It is produced by cutting out and deforming from the above or by resin molding.

  The insertion portion 41 has a tip end portion 41a formed narrower than the opening (maximum width such as the inner diameter) of the end portion 103a of the protective tube 103, and an inclination in which both sides continuous to the tip end portion 41a gradually increase. Part 41b and a rear end part 41c formed so that both sides continuous to the inclined part 41b are wider than the opening of the protective tube 103 end part 103a and parallel to the extending direction. . The front end portion 41a to the rear end portion 41c of the insertion portion 41 are formed in a circular arc shape that is curved so that the orthogonal direction to the extending direction is the circumferential direction.

  Thus, when the insertion portion 41 is inserted into the opening of the end portion 103a of the protective tube 103 from the tip portion 41a, the inclined portion 41b slides with respect to the inner corner portion of the protective tube 103 end portion 103a. The space between the split portions 105 is widened. As shown in FIG. 3, when the insertion part 41 is inserted up to the rear end part 41 c, the parallel sides abut against the inner surface of the protection pipe 103 end part 103 a. For this reason, even if the split portion 105 of the protective tube 103 is closed, the rear end portion 41c of the insertion portion 41 can remain in the end portion 103a of the protective tube 103 without slipping in the removal direction. It is possible to maintain a state in which the space between the split portions 105 is expanded. Since the insertion portion 41 is curved, the insertion of the electric wire D described later is started by inserting the electric wire D, which will be described later, by inserting the dividing portion 105 side to be expanded into the concave shape side. A large space (gap) can be secured, and the insertion operation can be started easily.

  The grip portion 42 is connected to the rear end portion 41c of the insertion portion 41, has a grippable area, is bent from the extending direction of the insertion portion 41 to the outer surface side of the curved surface, and The hook string 43 can be attached through the string in the pair of perforated holes 42a.

  Thereby, the grip part 42 does not get in the way when the electric wire D is positioned in the split part 105 of the protective tube 103. Further, the gripping portion 42 can be gripped without being disturbed by the electric wire D when being pulled out from the end portion 103a of the protective tube 103. For example, a gripping tool as shown in FIG. It can be grasped (gripped) and pulled out by the grip portion 31. At this time, it is possible to avoid dropping the expansion assisting tool 40 even if it has slipped by hooking the hook string 43 on the grip portion 31 of the Yatco 30. In addition, you may make it easy to work on this holding part 42 by sticking or apply | coating the material for slipping.

  Moreover, as shown in FIGS. 4-6, the insertion auxiliary tool 10 used simultaneously is constructed | assembled so that it can attach or detach with the electric wire D by a clip system, and a pair of main body member 11, the connection member 12, and The torsion spring (biasing means) 13, the plurality of roller members 14, the plurality of support members 15, and the hook string 16 are assembled and produced.

  The main body member 11 is formed in a shape that each bends a pair of flat plate materials into a "<" shape, and is connected to each other by a connecting member 12 so that the intermediate corner portions thereof are rotatable. . The main body member 11 extends to one end side (lower side in FIG. 4) centering on the connecting member 12, and has a sandwiching portion (expanding member) 21 that sandwiches an object as a clip, and the connecting member 12 as a center. And a pinch portion (extension member) 22 that extends to the other end side (upper side in FIG. 4) and is pinched to separate the pinching portions 21 from each other. The connecting member 12 is composed of, for example, general-purpose bolts 12a and nuts 12b so as to function as a shaft member. The connecting member 12 penetrates the both side surfaces of the main body member 11 as rotating shafts, and the main body members 11 are connected to each other. It connects so that it can rotate freely. The torsion spring 13 is attached so that the connecting member 12 passes through the body portion 13a and the leg portion 13b is positioned between the knob portions 22 of the main body member 11, and the knob portions 22 are connected to each other. The urging is performed in the direction of separation, and the sandwiched portions 21 of the main body member 11 are brought close to each other by the elastic force.

  Thereby, the main body member 11 can position the electric wire D between the pinching portions 21 by pinching the knob portion 22 in a direction in which the knob portion 22 approaches each other against the elastic force of the torsion spring 13. By releasing the force, the electric wire D can be held between the pinching portions 21 by the elastic force of the torsion spring 13. Similarly, the main body member 11 can be removed by removing the electric wire D from between the pinching portions 21 by pinching the picking portions 22 in a direction in which the picking portions 22 approach each other. Accordingly, the grip portion 31 of the Yatco 30 shown in FIG. 8 is held by the grip portion 22 and the pinching portion 21 is widened, and is taken to the vicinity of the electric wire D of the transformer 102 installed on the top of the power pole 101 at a remote position. The pinching portion 21 can be easily attached to the electric wire D without stopping the power supply. Similarly, the pinching portion 21 can be easily removed from the electric wire D by picking the picking portion 22 again with the yatco 30.

  The sandwiching portions 21 of the pair of main body members 11 are extended to one lateral outer side (the left outer side in FIG. 4), and an interrupting surface 21a that brings the outer surfaces (expanded surfaces) close to each other, and the other side surface. And a closing surface 21b that bends in a direction close to each other so as to be closed. On the interruption surface 21a of the pinching portion 21, an upper positioning portion 21c that is cut out in an arc shape so as to be positioned with the electric wire D being pinched is formed on the upper end side (side adjacent to the knob portion 22). On the other hand, on the side of the closing surface 21b, a lower positioning portion 21d is formed that opens the closing surface by being removed so as to be positioned with the electric wire D sandwiched between the lower portion (side away from the knob portion 22).

  Further, the sandwiching portions 21 of the pair of main body members 11 are guide ribs (guides) protruding in a rib shape parallel to the connecting member 12 on the side away from the knob portion 22 from the tip of the interrupt surface 21a to the vicinity of the closing surface 21b. Part) 23 is continuously provided.

  As a result, the sandwiching portion 21 can be inserted and interrupted between the split portion 105 of the protective tube 103 with the interrupt surface 21a narrowed at the tip side as the entrance side, and the protective tube 103 is gradually inserted by the interrupt surface 21a. Can be separated from each other. And this clamping part 21 gets over the split part 105 of the protection pipe | tube 103 by making the closing surface 21b into an exit side, maintaining the state expanded by the extended surface 21e of the outer surface continuous from the interruption surface 21a. (Passing through) the closing portion 105 can be closed. When the electric wire D is sandwiched and held in the pinching portion 21, the electric wire D is rotated or slid by the upper positioning portion 21c on the distal end side of the interrupt surface 21a and the lower positioning portion 21d by the closing surface 21b. It is positioned so as not to cause a positional shift even when the force is applied, and is positioned obliquely with respect to the guide rib 23 at the lower portion of the sandwiching portion 21. Therefore, the guide rib 23 is located inside the protective tube 103 at this time, and the guide tube 23 is guided in a state of sliding contact (engagement) while facing the inner surface of the split portion 105. can do. Here, since the pinching portion 21 holds the electric wire D at the two positions of the positioning portions 21c and 21d, it is relatively easy to rotate around the electric wire D and adjust the mounting posture so that it can be easily operated. Needless to say, you can. That is, the rotation here refers to rotation in a direction in which the guide rib 23 for guiding the protective tube 103 is parallel to the electric wire D.

  Furthermore, the pinching portions 21 of the pair of main body members 11 are provided with roller members 14 so as to extend along the widened surface 21e from the interrupt surface 21a to the continuous closing surface 21b (so as to constitute the widened surface 21e). The roller member 14 is juxtaposed so that the sliding direction of the protective tube 103 that moves relative to the split portion 105 while expanding the slit portion 105 coincides with the rotational direction. Further, like the roller member 14, a support member 15 is provided in the pinching portion 21 along the expanded surface 21 e, and the support member 15 is parallel to the roller member 14. Are in parallel.

  As shown in FIG. 5 and FIG. 6B, the roller member 14 of the pinching portion 21 is continuous with the interrupt surface 21a and is arranged on the outside so that the outer peripheral surface protrudes between the column members 15. The split portion 105 of the protective tube 103 is received from the interrupt surface 21a, and the split portion 105 of the protective tube 103 is received so that it does not slide on the support member 15. As a result, the protective tube 103 can be moved relative to the sandwiching portion 21 with a small force even in a state where the protective tube 103 is greatly expanded.

  As shown in FIG. 5B and FIG. 6B, the support member 15 of the sandwiching portion 21 is disposed on the inner side of the roller member 14 and is positioned and held by the positioning portions 21c and 21d. D can be held and held at the same time. Thereby, in addition to positioning the electric wire D by the positioning portions 21c and 21d, the pinching portion 21 is positioned and held so that the column member 15 does not rotate or move in two places in the extending direction of the electric wire D. can do.

  In addition, the grip part 22 of the pair of main body members 11 is attached with a rubber material for preventing slipping on the outer surface side, and a hook string 16 that can be hooked on other tools or the like is attached. ing. Thereby, the knob | pick part 22 can be pinched so that it may not slip using the YATKO 30 shown in FIG. 8, and the clip part 21 can be attached or detached to the electric wire D, and the hooking string 16 is attached to the YATKO 30 just in case. It is possible to avoid dropping the insertion assisting tool 10 even if it has slipped, by being hooked in the grip portion 31.

  Therefore, when the body portion 104 of the protective tube 103 is grasped by the Yachco 30 shown in FIG. 8 and the interruption surface 21a of the sandwiching portion 21 is inserted from the end portion 103a side between the split portions 105 and is relatively moved toward the closing surface 21b side. As shown in FIG. 7, the roller member 14 can smoothly slide and slide the gap between the split portions 105 of the protective tube 103 with a small force. The protective pipe 103 is guided while being slidably contacted with the guide rib 23 that approaches the electric wire D as the inner surface of the split portion 105 moves from the interrupt surface 21a toward the closing surface 21b, thereby being guided while being restricted from being separated. When the split part 105 gets over the sandwiching part 21 and closes, the electric wire D located at the position along the inner part is in an interior state.

  At this time, as shown in FIG. 3, the protective tube 103 is prepared in a state in which the insertion portion 41 of the expansion assisting tool 40 is inserted into the end portion 103 a and the space between the split portions 105 is expanded. Thus, the insertion assisting tool 10 attached to the electric wire D can be made to approach and be interrupted from the interrupting surface 21a of the sandwiching portion 21 between the expanding split portions 105. Since the split portion 105 of the end portion 103a of the protective tube 103 is widened by the spread assisting tool 40, and the flange 107 is also separated from each other, the interrupting surface 21a of the sandwiching portion 21 of the insertion assisting tool 10 is easily interrupted. Can be made.

  As a result, without removing the flange 107 from the inner surface side of the split portion 105 of the protective pipe 103, and without performing an unreasonable operation such as manually expanding the split portion 105 or pushing the electric wire D, the protective pipe. It is possible to insert the electric wire D between the split portions 105 of the 103 easily into an interior state.

  Here, the Yatco 30 is gripped by the operator with a gripping portion 31 that grips the gripping portion 22 of the insertion assisting tool 10 or grips the body portion 104 of the protective tube 103 and the gripping portion 42 of the expansion assisting tool 40. A support rod 35 for bringing the grip portion 31 to the vicinity of the electric wire D, a transmission rod 36 for transmitting a force for operating the grip portion 31, and a handle for operating the grip portion 31 by transmitting an operator's operation to the transmission rod 36. 37, an umbrella cover 38 for dripping moisture such as from the insertion assisting tool 10 side, and an umbrella cover 39 indicating a limit position where the work can be safely performed in consideration of insulation from the electric wire D. The whole is made of an insulating material such as plastic or rubber material to ensure insulation.

  Briefly, the grip portion 31 of the Yatco 30 is formed in an arc shape and fixed to the support rod 35, and is similarly formed in an arc shape and connected to the transmission rod 36. And a movable member 33 that is pivotally supported about a rotation shaft 32a on the stationary member 32 side. When the operator grasps the support rod 35 and the handle 37, the transmission rod 36 is pulled and the movable member 33 of the grasping portion 31 is rotated so that the movable member 33 approaches the immovable member 32. The opening assisting tool 40 and the protective tube 103 can be grasped. The movable member 33 of the grip portion 31 is biased in a direction away from the stationary member 32 by an elastic material such as a spring (not shown).

  As described above, in this embodiment, when the split portion 105 of the protective tube 103 is expanded by the insertion assisting tool 10 and the electric wire D is inserted into the protective tube 103 into the interior state, the operation is performed. Can be used as an auxiliary tool. That is, the split portion 105 can be separated and expanded by simply inserting the insertion portion 41 into the opening of the end portion 103 a of the protective tube 103, and a gap secured between the split portions 105. Thus, it is possible to start the operation of entering the interruption surface 21a of the pinch portion 21 of the electric wire D or the insertion assisting tool 10 from the beginning.

  Therefore, it can assist so that the operation | work which inserts the electric wire D in the protective tube 103 can be started smoothly, and the operation | work which inserts the electric wire D in the protective tube 103 can be made easy.

  Next, FIGS. 9-11 is a figure explaining 2nd Embodiment of the expansion assistance tool which concerns on this invention. In addition, since this embodiment is comprised substantially the same as the above-mentioned embodiment, the same code | symbol is attached | subjected to the same structure and a characteristic part is demonstrated.

  In FIG. 9, the expansion assisting tool 50 stops power supply to, for example, the electric wire D of the transformer 102 installed at the upper part of the utility pole 101 shown in FIG. 12, similarly to the expansion assisting instrument 40 of the above-described embodiment. Rather, when the work for covering the protective tube 103 shown in FIG. 13 from a remote position is performed, the work is used together with the grasping tool shown in FIG. 8 to assist the work.

  The expansion assisting tool 50 is provided with a grip portion 42 and a hook string 43 in an insertion portion 51 in place of the insertion portion 41 of the above-described embodiment. It is produced by cutting out and deforming a plate-like material, for example, a cylindrical resin material, or by resin molding.

  In the insertion part 51, the protective tube 103 is formed in a substantially cylindrical shape having the split part 105, whereas the cross-sectional shape 51a in the direction orthogonal to the extending direction thereof is an incomplete circle having a semicircular shape or more. It is formed to have a (curved shape). In other words, the insertion part 51 is formed such that a notch part 51c sandwiched between parallel end sides 51b of the cross-sectional shape 51a is continuous from the front end side to the rear end side at intervals of a semicircular or less. Yes.

  Moreover, the insertion part 51 is formed so that it may become an outer diameter about the internal diameter of the protective tube 103 of the state which expanded the split part 105 as much as necessary. That is, the insertion part 51 is formed so as to have a uniform outer diameter (outer surface interval) larger than the inner diameter (maximum inner surface interval) at the opening of the end portion 103a of the protective tube 103 from the front end side to the rear end side. Has been.

  Further, as shown in the developed view of FIG. 10, the insertion portion 51 has an R shape (an inclined shape may be used) on both the front end side and the rear end side of the end side 51b that defines the notch 51c. ).

  Thereby, the insertion part 51 pushes the opposite side of the notch part 51c of the front end side into the opening of the end part 103a of the protective tube 103 from the oblique direction, thereby forming a circular arc shape on the front end side of the insertion part 51. Can be easily inserted so that the space between the split portions 105 is widened while sliding with respect to the inner corner portion of the end portion 103a of the protective tube 103. At this time, the R-shaped edge portion 51 d can smoothly enter the opening of the end portion 103 a of the protective tube 103 and be smoothly inserted to the rear end side on the cutout portion 51 c side of the insertion portion 51.

  When the insertion portion 51 is inserted into the opening of the protective tube 103 end portion 103a up to the rear end side, a similar outer surface (an outer peripheral surface having the same diameter) comes into contact with the inner surface thereof. For this reason, even if the split portion 105 of the protective tube 103 is closed, the insertion portion 51 can remain in the end portion 103a of the protective tube 103 without slipping in the direction in which it is pulled out. It can be maintained in a state of spreading. Since the insertion portion 51 is curved in a substantially circular shape, the insertion portion 51 is inserted so that the split portion 105 side to be expanded becomes the concave shape side (the notch portion 51c side), and thereby a space (gap) for positioning the electric wire D is provided. ) Can be ensured as large as the inner surface of the protective tube 103, and the insertion operation of the electric wire D using the insertion assisting tool 10 can be easily started as in the above-described embodiment.

  On the other hand, as shown in FIG. 11, when the expansion aid 50 is inserted into the both ends 103 a of the short protective tube 103 and the split portion 105 is expanded, The split part 105 between the parts 103a can be completely separated (expanded). That is, after gripping the trunk portion 104 of the protective tube 103 with the Yachco 30 shown in FIG. 8 and inserting the electric wire D into the interior state as it is between the split portions 105, the holding portion 42 of the expansion assisting tool 40 is held with the Yattco 30. It is also possible to complete the insertion operation of the electric wire D by pulling out with (holding). In addition, although the insertion operation | movement of the same electric wire D may be performed using the expansion assistance tool 40 of the above-mentioned embodiment, when the body part 104 of the protective tube 103 is grasped by the Yattco 30, the expansion assistance tool 50 is used. Is more suitable than the expansion aid 40.

  As a result, without removing the flange 107 from the inner surface side of the split portion 105 of the protective pipe 103, and without performing an unreasonable operation such as manually expanding the split portion 105 or pushing the electric wire D, the protective pipe. It is possible to insert the electric wire D between the split portions 105 of the 103 easily into an interior state.

  As described above, in this embodiment, in addition to the same effect as the above-described embodiment, in the case of the short protective tube 103, the electric wire D can be easily placed in the protective tube 103 without using the insertion assisting tool 10. It is possible to assist the operation of inserting into the interior.

  Although one embodiment of the present invention has been described so far, it is needless to say that the present invention is not limited to the above-described embodiment, and may be implemented in various forms within the scope of the technical idea.

It is a figure which shows the schematic whole structure of 1st Embodiment of the expansion aid which concerns on this invention, (a) is the front view, (b) is the A arrow view. It is a partially expanded conceptual diagram which shows the hook means of the expansion assistance tool. It is a figure explaining use of the expansion aid. It is a figure which shows the insertion auxiliary tool used simultaneously, and is the elevation view. It is a figure at the time of making FIG. 4 the front view of the insertion assistance tool, (a) is a left view, (b) is a right view. It is a figure at the time of making FIG. 4 of the insertion assistance tool into a front view, (a) is a top view, (b) is a bottom view. It is a figure explaining use of the insertion auxiliary tool. It is a top view which shows the tool which grasps the expansion aid, the insertion aid, etc. It is a figure which shows the schematic whole structure of 2nd Embodiment of the expansion aid which concerns on this invention, (a) is the front view, (b) is the BB sectional drawing. It is an expanded view of the expansion assistance tool. It is a figure explaining use of the expansion aid. It is an elevation view which shows the electric wire inserted in a protection tube by the expansion assistance tool or insertion assistance tool. It is a figure which shows the protective tube which covers an electric wire with the expansion assistance tool or insertion assistance tool, (a) is the top view, (b) is the longitudinal cross-sectional view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Insertion aid 11 Main body member 12 Connection member 13 Torsion spring 14 Roller member 15 Strut member 16 Hooking string 21 Clamping part 21a Interrupting surface 22 Picking part 23 Guide rib 30 Yatco 31 Grasping part 37 Handle 40, 50 Expansion aid 41 51 Plug part 41a Tip part 41b Inclined part 41c Rear end part 42 Grasping part 43 Hook string 51b End side 51c Notch part 51d Edge part 103 Guard tube 104 Body part 105 Split part D Electric wire

Claims (5)

Expanding between the split parts cut in the extending direction of the protective tube formed in a cylindrical shape, and an expansion aid used when inserting the electric wire into the interior of the protective tube,
A tip portion formed narrower than the opening at the end of the protective tube, an inclined portion where both sides continuous to the tip gradually expand, and both sides connected to the inclined portion from the opening of the protective tube A rear end portion formed in a wide and insertable width, and having a plug portion made of a plate-shaped plate-shaped member prepared to include:
When the insertion portion is inserted into the opening of the protective tube by being relatively moved from the front end side toward the rear end side, at least a part of the rear end portion together with the front end portion and the inclined portion in the opening of the protective tube. To expand the space between the split portions of the protective pipe, and to define a space opened by the expansion between the split portions on one surface side of the plate-like member in the end portion of the protective pipe. Features a spreading aid.   The spreading aid according to claim 1, wherein the insertion portion is formed in an arc shape that curves in a direction perpendicular to the extending direction from the front end side to the rear end side.   The spreading aid according to claim 1 or 2, wherein a side parallel to the extending direction from the front end side is formed on the rear end side of the insertion portion. A gripping portion that is connected to the insertion portion and formed so as to be grippable,
The spreading aid according to any one of claims 1 to 3, wherein the grip portion is bent with respect to the extending direction from the front end side to the rear end side.   The expansion assisting device according to any one of claims 1 to 4, further comprising means for hooking on another tool or the like.

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