JP5770224B2 - Protective tube fitting - Google Patents

Description

  The present invention relates to a protective tube fitting for attaching a protective tube to an electric wire.

  For example, a protective pipe may be attached to an electric wire such as a high-voltage underline that connects between a transformer provided on a utility pole and a distribution line to prevent an electric shock. The protective tube is formed in a cylindrical shape by an insulating material, and is formed in a bellows shape so as to be easily bent. Furthermore, the split part is cut in the extending direction in the protective tube. Thereby, even if the electric wire remains connected to the transformer, for example, the protective tube can be mounted around the electric wire.

  In many cases, the attachment of the protective tube to the electric wire is performed as an indirect hot wire operation. In other words, the operator grips the protective tube using an indirect hot wire tool such as an insulated Yatco, moves the indirect hot wire tool to carry the protective tube to the installation start position of the electric wire, and operates the indirect hot wire tool to protect it. Attach the tube to the wire.

  Japanese Patent No. 4340180 describes a protective tube fitting (insertion aid) for attaching a protective tube to an electric wire. The protective tube fitting includes a clip-like pinching portion that holds the electric wire in the left-right direction in order to attach the protective tube fitting itself to the electric wire. In addition, on both the left and right sides of the sandwiching portion, there are formed expanded surfaces that spread the split portion of the protective tube when the protective tube is moved in the direction of mounting on the electric wire.

  Further, in the above protective tube fitting, a guide portion is provided on the open / close end side of the sandwiching portion to guide the protective tube in a state where the split portion is pushed and spread to the outer peripheral side of the electric wire. The guide portion includes a left side plate piece attached to the left opening / closing end of the sandwiching portion and a right side plate piece attached to the right opening / closing end of the sandwiching portion. It protrudes to the left, and the right edge of the right plate piece protrudes to the right of the clip. The curved inner surface of the protective tube comes into contact with or engages with these protruding portions, so that the path of the protective tube is determined and the protective tube is guided to the electric wire.

  Furthermore, in the above-described protective tube fitting, a plurality of roller members are arranged in parallel along the expanded surface in the sandwiching portion in order to smoothly move the protective tube toward the outer peripheral side of the electric wire.

  The operator can easily attach the protective tube to the electric wire using an indirect hot wire tool by using such a protective tube fitting. Specifically, the operator attaches the protective tube fitting to the installation start position of the electric wire using an indirect hot wire tool, and then uses the indirect hot wire tool to install the protective tube on the split portion at the end of the protective tube. It is possible to attach the protective tube to the electric wire simply by pressing the expanding surface of the attachment tool and lightly pushing the protective tube toward the electric wire with an indirect hot wire tool in that state.

Japanese Patent No. 4340180

  However, the protective tube fitting has the following problems. That is, in the above protective tube mounting tool, the roller members arranged side by side along the expanded surface are attached to the support portion provided on the left side portion or the right side portion of the sandwiching portion and the opening / closing end portion of the sandwiching portion. It is rotatably supported between the guide portions (the left side plate piece or the right side plate piece). Further, a gap is secured between the end of the roller member and the guide portion (the left plate piece or the right plate piece) facing the roller member so as to ensure smooth rotation of the roller member.

  When the protective tube is attached to the electric wire, the protective tube is guided toward the electric wire by the guide portion in a state where the split portion is pushed and expanded by the expanding surface. During this time, the edge of the split portion is pressed against the roller member.

  Since the roller member is formed in a columnar shape or cylindrical shape having the same diameter from one end to the other end, the edge of the split portion moves while being pressed against the roller member as the protective tube moves to the electric wire. In this case, the edge of the split part may slide on the roller member toward the guide part, and the edge of the split part may bite into the gap between the end of the roller member and the guide part.

  If the edge of the split part bites into the gap and the edge gets caught in the gap, the operator applies force to the protective tube via an indirect hot wire tool so that the operator pushes the protective tube toward the electric wire. However, the protective tube will not move toward the wire. In this case, the operator must once pull the protective tube in the reverse direction and remove the edge of the split portion from the gap. As a result, there is a problem that it is difficult to perform the work of attaching the protective tube to the electric wire, and the work load increases.

  The present invention has been made in view of the above-described problems, for example. The problem of the present invention is that the protective tube can always be smoothly moved toward the electric wire, and the mounting operation of the protective tube to the electric wire can be easily performed. It is another object of the present invention to provide a protective tube fitting that can reduce the work load.

In order to solve the above problems, a first protective tube attachment of the present invention is to expanded between split portions are cut in the extending direction of the protective tube formed in a cylindrical shape, the protective tube A protective tube mounting device to be mounted on an electric wire , having an expanded surface, positioning the electric wire inside, and inserting the expanded surface between split portions of the protective tube moving toward the electric wire. An expanding portion that expands between the split portions of the protective tube, a front side portion where an interruption to the split portion of the protective tube is started on the expanded surface, and an outer periphery of the electric wire on the expanded surface A positioning portion for positioning and holding the electric wire on the rear side portion carried out to the side, and positioning by the positioning portion while contacting or engaging the inner surface of the split portion of the protective tube so that the protective tube does not leave the expanded portion The protection to the outer peripheral side of the wire A guide portion that guides the wire, and sandwiches the electric wire, and the outer surfaces located on both the left and right sides are the expanded surfaces, and the expanded surfaces gradually approach each other toward the front. Then, a sandwiching portion formed with an interrupting surface to be inserted into the split portion of the protective pipe and a parallel arrangement along the expanding surface, and rotatably supported in the direction of relative movement of the split portion of the protective pipe A plurality of roller members, and the guide portion is formed in a plate shape, and is attached to the open / close end on the left side of the sandwiching portion, and the left edge portion is on the left side of the widened surface on the left side. A left guide piece that protrudes, and a right guide piece that is formed in a plate shape, is attached to the right opening and closing end of the sandwiching portion, and the right edge protrudes to the right from the expansion surface on the right side, In at least one roller member of the plurality of roller members The end located on the opening and closing end side of the pinching portion is flared portion is provided gradually diverging toward the tip, each of the left guide piece and the right guide piece, than the expansion portion Has a protruding portion that protrudes forward, and each protruding portion has a size that gradually decreases in the left-right direction toward the protruding end .

  According to a second protective tube fitting of the present invention, in the first protective tube fitting of the present invention described above, the plurality of roller members are respectively along the left-side expanded surface and the right-side expanded surface. As described above, in each of the pair of roller members arranged in two rows and arranged in different rows, a flare portion that gradually increases in diameter toward the tip is provided at the end portion located on the opening / closing end side of the sandwiching portion. It is provided.

According to a third protective tube fitting of the present invention, in the first or second protective tube fitting of the present invention described above, the open / close end of the clip portion is closed to align the left guide piece and the right guide piece. Further, the overall shape of the guide portion is a bowl shape or a surfboard shape.

According to a fourth protective tube mounting tool of the present invention, in any one of the first to third protective tube mounting devices of the present invention described above, the protruding portions of the left guide piece and the right guide piece are Before the end portion of the protective tube reaches the front end portion of the expanding portion, the split portion of the protective tube is interrupted to widen the split portion of the protective tube.

  ADVANTAGE OF THE INVENTION According to this invention, a protective tube can always be moved smoothly toward an electric wire, attachment work to the electric wire of a protective tube can be made easy, and a work burden can be reduced.

It is a front view which shows the protection pipe mounting tool by embodiment of this invention. It is a left view which shows the protection pipe mounting tool by embodiment of this invention. It is a right view which shows the protection pipe mounting tool by embodiment of this invention. It is a top view which shows the protection pipe mounting tool by embodiment of this invention. It is a bottom view which shows the protection pipe mounting tool by embodiment of this invention. It is an enlarged view which shows the flare part etc. of a roller member in the protection pipe mounting tool by embodiment of this invention. It is an external view which shows a protective tube. It is a cross-sectional view which shows the edge part of a protective tube. It is explanatory drawing which shows a mode that the protection pipe mounting tool by embodiment of this invention is mounted | worn with an electric wire. It is explanatory drawing which shows a mode that the protective tube mounting tool by embodiment of this invention is mounted on an electric wire following FIG. It is explanatory drawing which shows a mode that the protection pipe mounting tool by embodiment of this invention is mounted on an electric wire following FIG. It is a cross-sectional view which shows the edge part of the protection pipe by which the split part was expanded.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 5 show a protective tube fitting according to an embodiment of the present invention. FIG. 6 shows a flare portion or the like of the roller member in the protective tube fitting according to the embodiment of the present invention. 7 and 8 show a protective tube.

  1 to 5, the protective tube fitting 1 is a device for attaching the protective tube 103 (see FIG. 7) to an electric wire. By using the protective tube fitting 1, the work of attaching the protective tube 103 to the electric wire using an indirect hot wire tool such as an insulating Yatco becomes easy.

  As shown in FIG. 7 or FIG. 8, the protective tube 103 is formed in a cylindrical shape from an insulating material. The body portion 104 of the protective tube 103 is formed in a bellows shape. Thereby, the protective tube 103 can be bent freely. A slit-shaped split portion 105 extending in the extending direction is formed in a part of the peripheral portion of the body portion 104. Accordingly, the protective tube 103 can be attached to the electric wire even when the electric wire is connected to an electric device such as a transformer. The protective tube 103 is formed with legs 106 by projecting both ends of the split portion 105 outward in the radial direction of the protective tube 103. After the protective tube 103 is attached to the electric wire, the split portions 105 are reliably closed by the leg portions 106 coming into contact with each other. Thereby, the insulation state of the electric wire by the protective tube 103 is ensured reliably. Further, as shown in FIG. 8, the protective tube 103 is formed with a flange 107 by projecting the base end portion of one leg portion 106 toward the other leg portion 106 in the circumferential direction of the protective tube 103. ing. In the state where the split portion 105 is closed, the flange 107 formed on one leg portion 106 overlaps with the proximal end side of the other leg portion 106, and both are assembled with each other. Thereby, it is possible to prevent the protective tube 103 attached to the electric wire from being easily detached from the electric wire due to wind or the like. In the present embodiment, a case where the protective tube 103 having such a configuration is attached to an electric wire using the protective tube attaching device 1 is taken as an example, but the protective tube attaching device 1 is simply a bellows that is not formed. It can also be used when attaching other types of protective tubes, such as cylindrical protective tubes, to the electric wire.

  As shown in FIG. 1, the protective tube mounting tool 1 includes a mounting tool body 10 as an expanding portion. As shown in FIG. 2 or 3, the mounting tool main body 10 is divided into two divided bodies 11, and these divided bodies 11 are rotatably connected to each other by a connecting member 12 having bolts 12a and nuts 12b. Has been. In addition, the sandwiching portion 15 at the lower part of each divided body 11 is a portion that grips and holds the electric wire, and the grip portion 16 at the upper portion of each divided body 11 is sandwiched by the operator using an indirect hot wire tool. It is the part which operates opening and closing of. Further, as shown in FIG. 4, a torsion spring 13 is provided between the two divided bodies 11. The torsion spring 13 urges each of the divided bodies 11 in the direction in which the clip portion 15 is closed.

  The mounting tool body 10 operates like a clip. That is, when the left and right knobs 16 are picked and the force is applied in the direction in which these knobs 16 are brought close to each other against the urging force of the torsion spring 13, the pinch 15 is opened. On the other hand, when the application of force to the knob portion 16 is stopped, the pinching portion 15 is closed by the urging force of the torsion spring 13.

  Further, a hook string attaching portion 42 is provided on the knob portion 16 of one divided body 11, and a hook string 41 is attached to the hook string attaching portion 42. When the protective tube fitting 1 is attached to the electric wire, the hook string 41 is hooked on the tip of an indirect hot wire tool such as an infinite distance tool. Thereby, it is possible to prevent the protective tube fitting 1 from falling when it fails to attach the protective tube fitting 1 to the electric wire.

  In each divided body 11, an interrupt member 17 is provided on the front side (left side in FIG. 1) of the sandwiching portion 15. The interruption member 17 has an interruption surface 17a that is a plane extending in the vertical direction and the front-rear direction. As shown in FIG. 2 or FIG. 4, in a state in which the sandwiching portion 15 is closed, the interrupt surface 17 a of the interrupt member 17 provided on the left and right divided bodies 11 is positioned in the vicinity of the roller member 21 disposed on the foremost side. The trailing edge portions are spaced apart from each other and gradually approach each other as they move forward.

  In addition, the protective tube fitting 1 includes a positioning recess 18 and a positioning projection 19 that determine the positions of the protective tube fitting 1 and the electric wire at the front side portion and the rear side portion of the sandwiching portion 15. The positioning concave portion 18 and the positioning protrusion 19 have a function of causing the posture of the protective tube mounting tool 1 relative to the electric wire to a posture capable of correctly guiding the protective tube 103 to the electric wire (see FIG. 9). Specifically, as shown in FIG. 1 or FIG. 2, the positioning recess 18 is formed in the upper part of the front end portion of the interruption member 17 provided in each divided body 11. As shown in FIG. 3, the positioning projection 19 is formed by a plate-like member that is positioned on the rear surface side of each divided body 11 and extends downward from the middle portion in the vertical direction of the divided body 11.

  In addition, a plurality of roller members 21 and a plurality of support members 22 are provided at the lower part of each divided body 11, and a sandwiching portion 15 is formed by the roller members 21 and the support members 22. In the left divided body 11, the roller member 21 and the column member 22 are attached to the left divided body 11 using the support member 23 and the nut 24 together with the left guide piece 32 constituting a part of the guide portion 31. The left divided body 11 is provided with, for example, two roller members 21 and two column members 22. These roller members 21 and column members 22 are alternately arranged in the front-rear direction. Each roller member 21 is disposed on the outer side (left side) of each support member 22. Similarly, the right divided body 11 is also provided with, for example, two roller members 21 and two support members 22. These roller members 21 and column members 22 are alternately arranged in the front-rear direction. Each roller member 21 is disposed on the outer side (right side) of each support member 22. Each roller member 21 is rotatably supported by the divided body 11. On the other hand, each column member 22 is fixed to the divided body 11 so as not to rotate.

  It should be noted that the side surface of the left divided body 11, specifically, the interrupt surface 17 a of the interrupt member 17 provided on the left divided body 11, and the two roller members 21 and 2 provided on the left divided body 11. A surface formed by the column members 22 of the book corresponds to the expanded surface 25 of the left divided body 11. Further, the side surface of the right divided body 11, specifically, the interrupt surface 17 a of the interrupt member 17 provided on the right divided body 11, and the two roller members 21 and 2 provided on the right divided body 11. The surface formed by the column members 22 hits the expanded surface 25 of the right divided body 11.

  Each roller member 21 is formed with a flare portion 21a. As shown in FIG. 6, the flare portion 21 a is disposed at an end portion (lower end portion) of the roller member 21 positioned on the open / close end side of the sandwiching portion 15. Further, the flare portion 21 a gradually increases in diameter toward the lower end of the roller member 21. That is, the lower end portion of each roller member 21 has a skirt-open shape or a skirt shape. In other words, the outer peripheral surface of the lower end portion of each roller member 21 is inclined in a direction away from the axis of the roller member 21 as it goes downward. In addition, 27 and 28 in FIG. 6 are washers, respectively.

  Further, the protective tube fitting 1 is positioned by the positioning recess 18 and the positioning protrusion 19 while contacting or engaging the inner surface of the split portion 105 of the protective tube 103 so that the protective tube 103 is not detached from the fitting main body 10. The guide part 31 which guides the protective tube 103 to the outer peripheral side of the electric wire is provided. The guide unit 31 includes a left guide piece 32 and a right guide piece 33.

  The left guide piece 32 is formed in a plate shape, is disposed at the open / close end (lower end) of the sandwiching portion 15 of the left divided body 11, and is attached to the left divided body 11 using the support member 23. Further, the left side guide piece 32 has a left edge portion 32a projecting leftward from a left-side expanded surface (an outer peripheral surface facing the left side of the roller member 21 disposed on the left side). Similarly, the right guide piece 33 is formed in a plate shape, is disposed at the open / close end (lower end) of the sandwiching portion 15 of the right divided body 11, and is attached to the right divided body 11 using the support member 23. . Further, the right guide piece 33 has a right edge 33a protruding rightward from a right side expansion surface (an outer peripheral surface facing the right side of the roller member 21 disposed on the right side).

  Each of the left guide piece 32 and the right guide piece 33 has projecting portions 32 b and 33 b that project forward from the front end portion of the interruption member 17 provided in each divided body 11. Each projecting portion 32b, 33b gradually decreases in size in the left-right direction toward the projecting end. As shown in FIG. 5, when the sandwiching portion 15 is closed and the left guide piece 32 and the right guide piece 33 are combined, the overall shape of the guide portion 31 is a bowl shape or a surfboard shape.

  9 to 11 sequentially show how the protective tube fitting 1 is attached to an electric wire. FIG. 12 shows the protective tube 103 in which the split portion 105 is expanded by the left guide piece 32 and the right guide piece 33. With reference to FIGS. 9 to 12, the operation of mounting the protective tube 103 to the electric wire using the protective tube mounting tool 1, and the operation and effect of the protective tube mounting device 1 during the operation will be described.

  In the work of attaching the protective tube 103 to the electric wire D, the worker first attaches the protective tube fitting 1 to the position where the attachment of the protective tube 103 to the electric wire D is started (installation start position). The posture of the wearing tool 1 is adjusted.

  Specifically, the operator hooks the hook string 41 on the tip of the indirect live tool, grips the protective tube mounting tool 1 while gripping the knob 16, and starts mounting the protective tube mounting tool 1. Move to. Subsequently, the operator operates the indirect hot wire tool, applies a force to the knob 16 so that the left and right knobs 16 are brought close to each other, opens the clip 15, and sets the wire D inside the clip 15. , And the electric wire D is pinched between the pinching portions 15, and thereafter, the application of force to the knob portion 16 is stopped. Thereby, the pinching part 15 is closed, and the electric wire D is gripped by the pinching part 15. As a result, the protective tube fitting 1 is attached to the attachment start position of the electric wire D. Further, when the electric wire D is gripped by the sandwiching portion 15, the operator can insert a part of the electric wire into the positioning recess 18 and the other portion of the electric wire is between the positioning protrusion 19 and the rear end portion of the guide portion 31. The posture of the protective tube fitting 1 is adjusted so as to be positioned between them. Furthermore, an operator adjusts the attitude | position of the protection pipe mounting tool 1 so that the guide part 31 of the protection pipe mounting tool 1 may face upwards as needed.

  Next, the operator uses an indirect hot wire tool to place the end portion of the protective tube 103 at the protruding end of the protruding portion 32 b of the left guide piece 32 of the guide portion 31 and the protruding end of the protruding portion 33 b of the right guide piece 33. It is attached so as to cover it, and the protective tube 103 is lightly pushed in the direction of the arrow in FIG. Thereby, as shown in FIG. 10, the protrusions 32b and 33b enter the protective tube 103, respectively. Since the protrusions 32b and 33b become larger in the left-right direction as they go to the rear side of the protective tube fitting 1, as shown in FIG. 12, as the extent that the protective tube 103 enters the protrusions 32b and 33b increases. In addition, the protrusions 32 b and 33 b interrupt the split part 105 of the protective tube 103 and push the split part 105 apart. As a result, before the end of the protective tube 103 reaches the front end of the interrupting member 17 provided in each divided body 11, the flange 107 formed on one leg 106 in the protective tube 103 is moved to the other leg. It is sufficiently separated from the part 106. Further, in a state where the protective tube mounting tool 1 is attached to the electric wire D, the left guide piece 32 and the right guide piece 33 of the guide portion 31 approach or contact each other, and the overall shape of the guide portion 31 is bowl-shaped or It becomes a surfboard shape. Such an outer shape of the guide portion 31 makes it possible to smoothly move the protective tube 103 toward the electric wire D while sufficiently spreading the split portion 105.

  Further, when the operator pushes the protective tube 103 in the direction of the arrow in FIG. 10, the end of the protective tube 103 remains in a state in which the flange 107 and the other leg portion 106 are sufficiently separated from each other. 17, the interrupt surface 17 a of each interrupt member 17 is interrupted between the split portions 105 of the protective tube 103, and the split portion 105 is spread by the interrupt surfaces 17 a. By means of the protrusions 32b and 33b formed on the left guide piece 32 and the right guide piece 33, respectively, the flange 107 and the other leg part at the stage before the end of the protective tube 103 reaches the front end of each interrupt member 17. 106 is sufficiently separated from each other, the interrupt surface 17a of each interrupt member 17 can be smoothly interrupted between the split portions 105 of the protective tube 103.

  Further, when the operator pushes the protective tube 103 in the direction of the arrow in FIG. 10, the end of the protective tube 103 moves on each roller member 21, and as shown in FIG. To reach. During this time, each roller member 21 rotates in the direction in which the protective tube 103 moves.

  Further, while the protective tube 103 is moving on each roller member 21, the edge portion 32 a of the left guide piece 32 and the edge portion 33 a of the right guide piece 33 of the guide portion 31 are in contact with or engaged with the inner surface of the protective tube 103. Match. Thereby, the protective tube 103 moves reliably toward the electric wire D without detaching from each roller member 21.

  Further, the edge of the flange 107 of the protective tube 103 is pressed onto the roller member 21 while the protective tube 103 is moving on each roller member 21. In some cases, the edge of the flange 107 may be pushed toward the lower end side of the roller member 21. When the edge portion of the flange 107 is pushed toward the lower end side of the roller member 21, the edge portion of the flange 107 reaches the flare portion 21 a of the roller member 21. At this time, as shown in FIG. 6, the flare portion 21a is enlarged in diameter as it goes downward, so that the downward movement of the end portion of the flange 107 is stopped by the flare portion 21a. Thereby, the edge part of the collar 107 is prevented from biting into the gap G between the lower end part of the roller member 21 and the left guide piece 32 or the right guide piece 33 opposed thereto.

  That is, in the left divided body 11, a slight gap G is formed between the roller member 21 and the left guide piece 32 in order to ensure smooth rotation of the roller member 21. 21a prevents the edge of the flange 107 from biting into the gap G. Similarly, in the right divided body 11, a slight gap is formed between the roller member 21 and the right guide piece 33 in order to ensure smooth rotation of the roller member 21. 21a prevents the edge of the flange 107 from biting into the gap. Therefore, the edge of the flange 107 bites into the gap between the roller member 21 and the left guide piece 32 or the right guide piece 33, and this prevents the movement of the protective tube 103 toward the electric wire D from stopping. can do.

  The operator can move the protective tube 103 continuously and smoothly toward the electric wire D by continuously moving the protective tube 103 in the direction of the arrow in FIG. The protective tube 103 can be easily attached to the electric wire D.

  In addition, in the up-down direction of each roller member 21, the position where the flare part 21a starts (that is, the position where the diameter expansion starts) can be determined as appropriate. For example, it may be a position above the position shown in FIG. 6 or may be a position below. In addition, the degree of diameter expansion in the flare portion 21a (whether the diameter is increased greatly or decreased), or the aspect of the diameter expansion (the diameter expansion ratio is constant, the diameter is expanded linearly, or the diameter expansion ratio is It is possible to appropriately determine whether to increase the diameter so that the peripheral surface draws a curve in the vertical direction.

  In addition, when the biting of the flange 107 of the protective tube 103 occurs on both the lower end side and the upper end side of the roller member 21, flare portions may be formed on both the lower end portion and the upper end portion of the roller member 21. . In addition, when the biting of the flange 107 of the protective tube 103 occurs only on the upper end side of the roller member 21, a flare portion may be formed only on the upper end portion of the roller member 21.

  In the above-described embodiment, the flare portions 21a are formed in all the roller members 21. However, when the biting of the flange 107 of the protective tube 103 occurs only in some of the roller members 21, the part of the roller members 21a. The flare portion 21 a may be formed only in the portion 21.

  Further, the present invention can be appropriately changed without departing from the gist or concept of the invention that can be read from the claims and the entire specification, and a protective tube fitting with such a change is also applicable to the technology of the present invention. Included in thought.

1 Protective tube fitting device 10 Fitting device body (expansion part)
DESCRIPTION OF SYMBOLS 11 Divided body 12 Connection member 13 Torsion spring 15 Clamping part 16 Knob part 17 Interrupting member 17a Interrupting surface 18 Positioning recessed part (positioning part)
19 Positioning protrusion (positioning part)
21 Roller member 21a Flare part 22 Strut member 25 Expanded surface 31 Guide part 32 Left guide piece 33 Right guide piece 32a, 33a Edge part 32b, 33b Projection part

Claims (4)

A protective tube mounting tool for expanding between the split portions cut in the extending direction of the protective tube formed in a cylindrical shape, and mounting the protective tube on the electric wire ,
An expansion surface having an expansion surface for positioning the electric wire inside and expanding the space between the split portions of the protective tube by inserting the expansion surface between the split portions of the protective tube moving toward the electric wire. Opening part,
A positioning portion for positioning and holding the electric wire on a front side portion where interruption to the split portion of the protective tube is started on the expansion surface and a rear side portion where the protective tube is carried out to the outer peripheral side of the electric wire on the expansion surface; ,
A guide portion for guiding the protective tube to the outer peripheral side of the electric wire positioned by the positioning portion while contacting or engaging with the inner surface of the split portion of the protective tube so that the protective tube does not leave the expanding portion. And
The expanding portion is
The outer surfaces located on both the left and right sides are gripped across the electric wires, and the expanded surfaces are respectively the expanded surfaces, and the expanded surfaces are gradually approaching each other toward the front and interrupt surfaces that are inserted into the split portions of the protective pipes. A formed clip portion;
A plurality of roller members that are arranged side by side along the expanded surface and are rotatably supported in the direction of relative movement of the split portion of the protective tube;
The guide part is
A left guide piece which is formed in a plate shape, is attached to the left open / close end of the sandwiching portion, and the left edge protrudes to the left from the widened surface on the left side;
A right guide piece that is formed in a plate shape, is attached to the right opening and closing end of the sandwiching portion, and the right edge protrudes to the right from the expansion surface on the right side;
In at least one roller member of the plurality of roller members, an end portion located on the opening / closing end side of the sandwiching portion is provided with a flare portion that gradually increases in diameter toward the tip thereof ,
Each of the left side guide piece and the right side guide piece has a protruding portion protruding forward from the expanding portion, and each protruding portion is gradually reduced in size in the left-right direction toward the protruding end. Special protective tube fitting.   The plurality of roller members are arranged in two rows so as to be along the left side expansion surface and the right side expansion surface, respectively, and the sandwiching portions in each of a pair of roller members arranged in different rows from each other 2. The protective tube fitting according to claim 1, wherein a flare portion that gradually increases in diameter toward the tip thereof is provided at an end portion that is positioned on the open / close end side of the first and second ends. 3. The overall shape of the guide portion, which is a combination of the left side guide piece and the right side guide piece by closing the open / close end of the pinching portion, is a bowl shape or a surfboard shape. Protective tube fitting. The protruding portions of the left guide piece and the right guide piece interrupt the split portion of the protective tube before the end portion of the protective tube reaches the front end portion of the expanding portion, The protective tube fitting according to any one of claims 1 to 3, wherein the split portion is expanded.

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