JP2019149883A - Protective tube and method of attaching the same - Google Patents

Abstract

To provide a protective tube that can be easily attached to an electric wire, and a method for attaching the protective tube.SOLUTION: The protective tube made of non-conductive material and attached to an electric wire, includes: a first pipe part having both ends open, in which a gap is provided between circumferential ends of a sheet member bent so that an internal space is formed inside; a plurality of support members, provided on an inner circumferential surface of the first pipe part, arranged along an extending direction of the gap; an annular first annular member, detachably provided on at least one end of the first pipe part, elastically biased in a direction of closing the gap; and a first connecting part that is provided at the first annular member and can be connected to the annular member provided in another pipe part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a protective tube and a method for attaching the protective tube.

  For example, when work is performed in the vicinity of a peripheral wire such as a distribution line or a lead-in wire, a non-conductive protective tube is attached to the wire in order to prevent an accident such as an electric shock from the wire. For example, Patent Literature 1 below describes an electric wire protector having a bellows-like tube portion that can expand and contract in the axial direction. In the wire protector of Patent Document 1 below, the position of the wire is fixed by an opening / closing member provided at one end of the tube portion with the wire inserted inside the tube portion. When the open / close member provided at the other end is moved along the electric wire while being opened, the bellows-shaped tube portion is extended. Thereby, an electric wire protector covers an electric wire.

JP 2014-155256 A

  Since the wire protector of patent document 1 extends a pipe part according to the curve state of an electric wire, fixing an electric wire, attachment work may become difficult. In addition, the wire protector may be reused for other electric wires by cutting the tube portion with a scissors or the like and adjusting the length to an appropriate length. Since the wire protector of patent document 1 has the opening / closing member which clamps an electric wire, it may become difficult to reuse.

  An object of this invention is to solve the said subject and to provide the attachment method of the protective tube which can perform the attachment operation | work to an electric wire easily.

  A protective tube according to an aspect of the present invention is a protective tube made of a non-conductive material and attached to an electric wire, and the end portions in the circumferential direction of sheet members bent so as to have an internal space inside. And a plurality of support members provided on the inner peripheral surface of the first pipe portion and arranged along the extending direction of the gap portion. An annular first annular member that is detachably provided at at least one end of the first pipe part, and is elastically biased in a direction to close the gap, and is provided on the first annular member, And a first connecting part that can be connected to an annular member provided in the pipe part.

  According to this, since the 1st pipe part has a soft sheet member, when inserting an electric wire along the crevice part of the 1st pipe part, it can control that an electric wire is damaged. Moreover, since the 1st annular member is provided so that attachment or detachment is possible, when reusing for the electric wire from which length differs, it is easy to cut | disconnect a 1st pipe part and to adjust to an appropriate length. Therefore, the protective tube can be easily attached to the electric wire.

  As a desirable mode of the present invention, an annular opening / closing member that is elastically biased in a direction of closing the gap is provided at the other end of the first pipe portion, and the opening / closing member includes a ring portion and a pair of opening / closing members. The ring part is provided with a gap in a part in the circumferential direction, is provided to surround the outer periphery of the first pipe part, and the pair of extension parts are provided with the gap. Opening / closing that is provided at each of the ends of the ring portions facing each other and extends outward in the radial direction, and connects the pair of extending portions to at least one of the opposing surfaces of the pair of extending portions. It has a member connection part. According to this, the opening / closing member can be opened and closed by the opening / closing member connecting portion. Thereby, since the clearance part of a 1st pipe part can be opened and closed, the mounting | wearing operation | work to the electric wire of a protection pipe | tube can be performed easily.

  As a desirable mode of the present invention, a second pipe portion in which a gap portion is provided between circumferential end portions of the sheet member bent so as to form an internal space on the inner side and both ends are open, and the second A plurality of second support members provided on an inner peripheral surface of the pipe part and arranged along the extending direction of the gap part, and detachably provided on at least one end of the second pipe part, An annular second annular member that is elastically biased in a direction to close the gap portion, and a second connection portion that is provided on the second annular member and can be connected to the first connection portion. According to this, the 1st pipe part and the 2nd pipe part can be connected via the 1st annular member and the 2nd annular member. For this reason, the length of the protective tube can be appropriately adjusted according to the length of the electric wire.

  As a desirable mode of the present invention, one of the first connection part or the second connection part has a convex part protruding in the extending direction of the gap part, and the first connection part or the second connection part The other has a concave portion that meshes with the convex portion. According to this, the connection operation | work with a 1st pipe part and a 2nd pipe part can be performed easily.

  A method for attaching a protective tube according to an aspect of the present invention is a method for attaching a protective tube to an electric wire having a curved portion, wherein the electric wire includes a first portion, a second portion, the first portion, and the first portion. The first portion and the second portion have a radius of curvature larger than the radius of curvature of the curved portion, and the first portion. Attaching a first protective tube having a length corresponding to the length of the second portion to the first portion, and attaching a second protective tube having a length corresponding to the length of the second portion to the second portion. And moving the first protective tube and the second protective tube along the electric wire, and a first annular member provided at an end of the first protective tube, and an end of the second protective tube Connecting the provided second annular member via a connecting portion provided on each, and A.

  According to this, a some protective pipe can be connected according to the length of an electric wire. The plurality of protective tubes are attached to the first portion and the second portion having a large radius of curvature. That is, when installing a plurality of protective tubes, there is no need to deform the protective tubes into a shape corresponding to a curved portion having a small curvature radius. For this reason, the protective tube can be easily attached to the electric wire. Moreover, damage to the electric wire due to contact between the bent portion of the electric wire and the protective tube can be suppressed.

  As a desirable mode of the present invention, a pipe member is provided in which a gap is provided between circumferential ends of a sheet member bent so that an internal space is formed inside, and both ends are opened. Cutting according to the length of the electric wire, and attaching an annular member that is elastically biased in the direction of closing the gap to the end of the tube. According to this, it is easy to cut the tube portion and adjust it to an appropriate length. Therefore, the protective tube can be easily attached to the electric wire, and the protective tube can be reused for electric wires having different lengths.

  According to the protective tube and the method for attaching the protective tube according to one aspect of the present invention, it is possible to easily perform the mounting operation on the electric wire.

FIG. 1 is a side view of a protective tube according to an embodiment. FIG. 2 is a side view showing a contracted state of the protective tube according to the embodiment. FIG. 3 is a front view of the protective tube according to the embodiment. 4 is a cross-sectional view taken along the line IV-IV 'of FIG. Drawing 5 is a sectional view of the 1st connection part and the 2nd connection part which a protection pipe concerning an embodiment has. FIG. 6 is an explanatory diagram illustrating a method for adjusting the length of the protective tube in the method for attaching the protective tube according to the embodiment. FIG. 7 is an explanatory diagram for explaining a method of attaching a protective pipe according to the embodiment to an electric wire having a curved portion.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a protective tube and a method for attaching a protective tube according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by the following embodiment. Further, the constituent elements of this embodiment include those that can be replaced while maintaining the identity of the invention and that are obvious for replacement. Moreover, the method, apparatus, and modification example described in this embodiment can be arbitrarily combined within the scope obvious to those skilled in the art.

(Embodiment)
FIG. 1 is a side view of a protective tube according to an embodiment. FIG. 2 is a side view showing a contracted state of the protective tube according to the embodiment. FIG. 3 is a front view of the protective tube according to the embodiment. 4 is a cross-sectional view taken along the line IV-IV ′ of FIG. Drawing 5 is a sectional view of the 1st connection part and the 2nd connection part which a protection pipe concerning an embodiment has.

  For example, the protective tube 1 according to the present embodiment is mounted so as to cover the electric wire 5 when performing a hot wire operation to protect the electric wire 5. Each component of the protective tube 1 is made of a non-conductive material. As shown in FIG. 1, the protective tube 1 has a first protective tube 2 and a second protective tube 3. The first protective tube 2 and the second protective tube 3 are connected in the axial direction.

  The first protective tube 2 includes a first tube portion 21, a first support member 22, an opening / closing member 23, a first annular member 24, and a first connection portion 25. The first tube portion 21 has a tubular shape having openings at both ends and an internal space along the electric wire 5. The 1st pipe part 21 has the soft sheet | seat member bent so that space might be formed inside. As the first tube portion 21, for example, a synthetic resin such as polyethylene formed in a sheet shape can be used. The first tube portion 21 can be deformed by a force acting in the axial direction and the radial direction of the first tube portion 21. As shown in FIGS. 3 and 4, a gap SP is formed between the end 21 a and the end 21 b in the circumferential direction of the first pipe portion 21. The gap part SP is provided along the axial direction of the first pipe part 21. The electric wire 5 is arrange | positioned inside the 1st pipe part 21 through the clearance gap part SP.

  As shown in FIG. 1, the first support member 22 is provided on the inner peripheral surface of the first pipe portion 21, and a plurality of first support members 22 are arranged along the extending direction of the gap portion SP. As shown in FIGS. 3 and 4, the first support member 22 is an annular member along the inner peripheral surface of the first tube portion 21. A gap portion is formed between the end portion 22 a and the end portion 22 b in the circumferential direction of the first support member 22. The gap portion of the first support member 22 is provided at a position that overlaps the gap portion SP of the first pipe portion 21. The first support member 22 is made of a material harder than the first pipe portion 21. Thereby, the 1st support member 22 suppresses a deformation | transformation of the 1st pipe part 21 at the position in which the 1st support member 22 was provided at least.

  The first protective tube 2 shown in FIG. 1 has a length L1 along the axial direction. FIG. 2 shows a state in which the first protective tube 2 is contracted to the length L1a. The length L1a is shorter than the length L1. As shown in FIG. 2, the first tube portion 21 has a bellows shape in which portions having a first diameter d1 and portions having a second diameter d2 are alternately provided along the axial direction. The second diameter d2 is larger than the first diameter d1. Here, the first diameter d <b> 1 and the second diameter d <b> 2 are outer diameters in a direction orthogonal to the axial direction of the first pipe portion 21. A first support member 22 is provided at a portion of the first pipe portion 21 having the second diameter d2. The first support member 22 is not provided in the portion of the first pipe portion 21 having the first diameter d1. With such a configuration, the first protective tube 2 can be expanded and contracted along the axial direction. As shown in FIGS. 1 and 2, since the plurality of first support members 22 are provided, the shape of the first tube portion 21 when the first tube portion 21 is attached to the electric wire 5 is maintained. be able to.

  Note that the number and arrangement interval of the first support members 22 can be appropriately changed. As shown in FIGS. 3 and 4, the end 22 a and the end 22 b of the first support member 22 are provided at positions that overlap the end 21 a and the end 21 b of the first pipe portion 21, respectively. However, the end 22 a and the end 22 b of the first support member 22 may be provided at positions overlapping the inner peripheral surface of the first pipe portion 21. The first support member 22 may be composed of a plurality of members provided along the inner periphery of the first pipe portion 21.

  As shown in FIG. 1, the first annular member 24 is detachably provided at one end of the first pipe portion 21. The opening / closing member 23 is provided at the other end of the first pipe portion 21. The opening / closing member 23 is elastically biased in a direction to close the gap portion SP of the first pipe portion 21. As shown in FIG. 3, the opening / closing member 23 includes a ring part 231 and an extension part 232. The ring part 231 is provided so as to surround the outer periphery of the first pipe part 21. The ring portion 231 is provided so as to overlap with a portion where the first support member 22 is provided in the axial direction of the first tube portion 21. In other words, the first pipe portion 21 is provided between the ring portion 231 and the first support member 22. Thereby, the ring part 231 is satisfactorily fixed to the end part of the first pipe part 21 by the first support member 22 receiving the elastic force from the ring part 231. Further, the first tube portion 21 having a soft sheet member is sandwiched between the ring portion 231 and the first support member 22. Thereby, the strength of the first protective tube 2 is improved.

  A gap is formed in a portion of the ring portion 231 in the circumferential direction so as to overlap with the gap SP. The end portion 231a and the end portion 231b of the ring portion 231 face each other in the circumferential direction. The pair of extending portions 232 are respectively connected to the end portions 231a and 231b of the ring portion 231 and extend outward from the ring portion 231 in the radial direction. Opening / closing member connecting portions 233a and 233b are provided on the opposing surfaces of the pair of extending portions 232, respectively. The opening / closing member connecting portions 233a and 233b only have to be connectable to each other, similarly to the first connecting portion 25 and the second connecting portion 36 shown in FIG. For example, one of the opening / closing member connecting portions 233a and 233b has a convex portion protruding in the axial direction, and the other has a concave portion that meshes with the convex portion.

  By connecting the opening / closing member connecting portions 233a and 233b, the ring portion 231 is deformed so that the gap portion becomes smaller. Thereby, gap part SP of the 1st pipe part 21 becomes small, and it can control that the 1st protection pipe 2 falls from electric wire 5. Moreover, the ring part 231 deform | transforms so that a clearance gap may become large by canceling | releasing connection of the opening-and-closing member connection part 233a, 233b. In this case, an operation may be performed so as to widen the interval between the extending portions 232 with an indirect hot wire tool such as a hot stick (insulating operation rod). Thereby, the clearance part SP of the 1st pipe part 21 becomes large. The first protective tube 2 is attached to the electric wire 5 by arranging the electric wire 5 in the internal space of the first tube portion 21 via the gap portion SP. Alternatively, the first protective tube 2 is removed from the electric wire 5 via the gap SP.

  As shown in FIG. 4, the first annular member 24 is an annular member and is provided so as to surround the outer periphery of the first pipe portion 21. The first annular member 24 is elastically biased in a direction to close the gap portion SP of the first pipe portion 21. A gap portion is formed in a part of the outer periphery of the first annular member 24 at a position overlapping the gap portion SP of the first pipe portion 21. The first annular member 24 is provided so as to overlap with a portion where the first support member 22 is provided in the axial direction of the first pipe portion 21. In other words, the first pipe portion 21 is provided between the first annular member 24 and the first support member 22. As a result, the first support member 22 receives the elastic force from the first annular member 24, whereby the first annular member 24 is satisfactorily fixed to the end portion of the first pipe portion 21. Further, the first tube portion 21 having a soft sheet member is sandwiched between the first annular member 24 and the first support member 22. Thereby, the strength of the first protective tube 2 is improved.

  A plurality of first connection portions 25 are provided on the surface of the first annular member 24 that intersects the axial direction. The plurality of first connection portions 25 are arranged along the circumferential direction of the first annular member 24. The 1st connection part 25 can be connected with the 2nd annular member 33 provided in the other 2nd pipe part 31 shown in FIG. Thereby, the 1st protective tube 2 and the 2nd protective tube 3 are connected along an axial direction.

  Note that the circumferential ends 24 a and 24 b of the first annular member 24 shown in FIG. 4 are provided at positions overlapping the ends 21 a and 21 b of the first pipe portion 21. However, the end portions 24 a and 24 b of the first annular member 24 may be provided at positions that overlap the outer peripheral surface of the first pipe portion 21. Moreover, the number and arrangement | positioning space | interval of the 1st connection part 25 can be changed suitably.

  As shown in FIG. 1, the second protective tube 3 includes a second tube portion 31, a second support member 32, a second annular member 33, and a third annular member 34. The axial length L2 of the second protective tube 3 is shorter than the length L1 of the first protective tube 2. However, the length L2 may be the same as the length L1, or may be longer than the length L1.

  Similar to the first tube portion 21, the second tube portion 31 includes a soft sheet member. The 2nd pipe part 31 is provided with the clearance gap part (illustration omitted) along an axial direction, and both ends open. In addition, the second support member 32 is provided on the inner peripheral surface of the second pipe portion 31, and a plurality of second support members 32 are arranged along the axial direction. In addition, since the 2nd pipe part 31 and the 2nd support member 32 have the structure similar to the 1st pipe part 21 and the 1st support member 22 of the 1st protection pipe 2, detailed description is abbreviate | omitted. As shown in FIG. 2, the 2nd pipe part 31 also has a bellows shape. The 2nd pipe part 31 shown in FIG. 2 is the state shrunk to length L2a. That is, the diameter of the second pipe portion 31 is different between the portion where the second support member 32 is provided and the portion where the second support member 32 is not provided. With such a configuration, the second protective tube 3 can be expanded and contracted along the axial direction.

  As shown in FIG. 1, a second annular member 33 is provided at one end of the second pipe portion 31, and a third annular member 34 is provided at the other end. The 2nd annular member 33 and the 3rd annular member 34 are provided in the 2nd pipe part 31, respectively so that attachment or detachment is possible. The second annular member 33 and the third annular member 34 are elastically biased in a direction to close the gap portion of the second pipe portion 31. The second annular member 33 and the third annular member 34 are both similar in configuration to the first annular member 24 shown in FIG.

  As shown in FIG. 1, a second connection portion 36 is provided on the surface of the second annular member 33 that faces the first annular member 24. The second connection part 36 is provided at a position facing the first connection part 25.

  The 1st connection part 25 and the 2nd connection part 36 should just have the structure which can be connected mutually. As shown in FIG. 5, the first connection portion 25 includes a base member 251 and a convex portion 252. The convex portion 252 is provided on the base member 251 and protrudes from the base member 251 along the extending direction of the gap portion SP of the first tube portion 21. The second connection part 36 includes a base member 361 and a convex part 362. The convex portion 362 has an internal space and protrudes toward the first connection portion 25. An opening 362 a is provided on the surface of the convex portion 362 facing the first connecting portion 25. Thereby, the recessed part 362b is formed in the inside of the convex part 362. FIG. The concave portion 362 b meshes with the convex portion 252 of the first connection portion 25. Thereby, the 1st connection part 25 and the 2nd connection part 36 are connected.

  With such a configuration, as shown in FIG. 1, the first protective tube 2 and the second protective tube 3 are connected along the axial direction. Thereby, the length of the protective tube 1 can be appropriately adjusted according to the length of the electric wire 5. In addition, the 1st connection part 25 and the 2nd connection part 36 which are shown in FIG. 5 are an example to the last, and can deform | transform suitably. Moreover, the 1st connection part 25 and the 2nd connection part 36 should just be provided at least 1 each, respectively.

  As shown in FIG. 1, a third connection portion 38 is provided on a surface of the third annular member 34 that is orthogonal to the axial direction. The 3rd connection part 38 is provided so that connection with the other protection pipe which is not shown in figure is possible. That is, the protective tube 1 shown in FIG. 1 can also connect three or more protective tubes along the axial direction.

  As described above, the protective tube 1 of the present embodiment is made of a non-conductive material and is a protective tube 1 that is attached to the electric wire 5 and is a sheet member that is bent so that an internal space is formed inside. The gap portion SP is provided between the end portions in the circumferential direction, the first pipe portion 21 having both ends opened, and the inner peripheral surface of the first pipe portion 21, along the extending direction of the gap portion SP. A plurality of first support members 22 arranged in a row and an annular first annular member 24 that is detachably provided at at least one end of the first pipe portion 21 and is elastically biased in a direction to close the gap portion SP. And a first connecting portion 25 that is provided on the first annular member 24 and can be connected to an annular member (second annular member 33) provided on another pipe portion (second pipe portion 31).

  According to this, since the 1st pipe part 21 has a soft sheet member, when inserting the electric wire 5 along the clearance gap SP of the 1st pipe part 21, it can suppress that the electric wire 5 is damaged. Moreover, since the 1st annular member 24 is provided so that attachment or detachment is possible, when reusing to the electric wire 5 from which length differs, it is easy to cut | disconnect the 1st pipe part 21 and to adjust to suitable length. is there. Therefore, the protective tube 1 can be easily attached to the electric wire 5.

  Further, in the protective tube 1 of the present embodiment, an annular opening / closing member 23 that is elastically biased in a direction to close the gap portion SP is provided at the other end portion of the first tube portion. It has a ring portion 231 and a pair of extending portions 232. The ring portion 231 is provided with a gap in a part of the circumferential direction and surrounds the outer periphery of the first tube portion 21. The pair of extending portions 232 are provided at each of the end portions 231a and 231b of the ring portion facing each other with a gap therebetween, and extend outward in the radial direction. Opening / closing member connecting portions 233a and 233b for connecting the extending portions 232 are provided on at least one of the pair of extending portions 232 and the opposing surfaces of the pair of extending portions 232. According to this, the opening / closing operation of the opening / closing member 23 can be performed by the opening / closing member connecting portions 233a, 233b. Thereby, since the clearance part SP of the 1st pipe part 21 can be opened and closed, the mounting | wearing operation | work to the electric wire 5 of the 1st protective pipe 2 can be performed easily.

  In addition, in the protective tube 1 of the present embodiment, a second tube portion in which a gap portion SP is provided between the end portions in the circumferential direction of the sheet member bent so as to form an internal space inside, and both ends are open. 31, a plurality of second support members 32 provided on the inner peripheral surface of the second pipe part 31 and arranged along the extending direction of the gap part SP, and at least one end of the second pipe part 31 An annular second annular member 33 that is detachably provided and elastically biased in the direction of closing the gap, and a second connection portion 36 that is provided on the second annular member 33 and can be connected to the first connection portion 25; Have According to this, the 1st pipe part 21 and the 2nd pipe part 31 can be connected via the 1st annular member 24 and the 2nd annular member 33. FIG. For this reason, the length of the protective tube 1 can be adjusted appropriately according to the length of the electric wire.

  Further, in the protective tube 1 of the present embodiment, one of the first connection portion 25 or the second connection portion 36 has a convex portion 252 that protrudes in the extending direction of the gap portion SP, and the first connection portion 25 or the first connection portion 25. The other of the two connecting portions 36 has a concave portion 362 b that meshes with the convex portion 252. According to this, the connection work of the 1st pipe part 21 and the 2nd pipe part 31 can be performed easily.

(Protection tube mounting method)
FIG. 6 is an explanatory diagram illustrating a method for adjusting the length of the protective tube in the method for attaching the protective tube according to the embodiment. In FIG. 6, a case where the used first protective pipe 2 </ b> A is reused for protecting other electric wires 5 will be described. As shown in FIG. 6, the first protective tube 2A is prepared (step ST11). The first protective tube 2A has the same configuration as the first protective tube 2 shown in FIG. In other words, the first tube portion 21 of the first protective tube 2A is provided with a clearance SP between the circumferential ends of the sheet member bent so that an internal space is formed inside, and both ends open. .

  Next, according to the length of the electric wire 5 to which the first protective tube 2A is to be attached, the first tube portion 21 is cut at the position of the virtual line A1 shown in step ST11 (step ST12). The part connected with the opening-and-closing member 23 among the 1st pipe parts 21 is removed. Thereby, the length of the axial direction of the 1st pipe part 21 becomes short to length L3. A first annular member 24 is provided at one end of the first pipe portion 21, and only the first support member 22 is provided at the other end.

  The fourth annular member 26 is attached to the other end of the first pipe portion 21 (step ST13). The fourth annular member 26 has a configuration similar to that of the first annular member 24. That is, the fourth annular member 26 is elastically biased in a direction to close the gap portion SP (see FIG. 3). By such a method, the 1st pipe part 21 can be cut | disconnected and the length of 1 A protective tube 2A can be adjusted according to the length of the electric wire 5. FIG. Thereby, the first protective tube 2A can be reused as the second protective tube 3A having the axial length L3.

  FIG. 7 is an explanatory diagram for explaining a method of attaching a protective pipe according to the embodiment to an electric wire having a curved portion. As illustrated in FIG. 7, the electric wire 5 is a lead-in wire that supplies electric power from the transformer 100 to a construction such as a factory or a general household. One end 5a of the electric wire 5 is connected to a transformer 100 provided on a utility pole or the like. The other end 5b of the electric wire 5 is connected to a lead-in wire attachment point (not shown) installed in the construction. In addition, the electric wire 5 may be another electric wire 5 such as a peripheral wire.

  The electric wire 5 includes a first portion 5c, a second portion 5d, and a curved portion 5e provided between the first portion 5c and the second portion 5d. The first portion 5c and the second portion 5d have a radius of curvature that is greater than the radius of curvature of the curved portion 5e.

  First, the first protective tube 2 and the second protective tube 3 are prepared (step ST21). The first protective tube 2 and the second protective tube 3 have the same configuration as that shown in FIG. 1 and the like, and detailed description thereof is omitted. The first protective tube 2 has a length L1 (see FIG. 1) corresponding to the length of the first portion 5c. The second protective tube 3 has a length L2 (see FIG. 1) corresponding to the length of the second portion 5d. In addition, as shown in FIG. 6, the 2nd protective tube 3A which adjusted the length by reusing the used 1st protective tube 2A can also be used as the 2nd protective tube 3. As shown in FIG.

  Next, the first protective tube 2 is attached to the first portion 5c (step ST22). In this case, before attaching to the first portion 5c, the first protective tube 2 is deformed so as to follow the shape of the first portion 5c. And the 1st protection pipe 2 can be attached to the 1st part 5c so that the clearance part SP (refer FIG. 3) of the 1st pipe part 21 may be along the 1st part 5c. In this case, a part of the first portion 5 c is in contact with the inner peripheral surface of the first tube portion 21 of the first protective tube 2.

  Next, the second protective tube 3 is attached to the second portion 5d (step ST23). In this case, before attaching to the second portion 5d, the second protective tube 3 is deformed so as to follow the shape of the second portion 5d. Then, the second protective tube 3 can be attached to the second portion 5d so that the gap portion SP of the second tube portion 31 extends along the second portion 5d. In this case, a part of the second portion 5 d is in contact with the inner peripheral surface of the second pipe portion 31 of the second protective tube 3.

  Next, the first protective tube 2 and the second protective tube 3 are moved along the electric wires 5 in a direction approaching each other. The first annular member 24 of the first protective tube 2 and the second annular member 33 of the second protective tube 3 are respectively connected to the connecting portions (the first connecting portion 25 and the second connecting portion 36 (see FIG. 5). )) (Step ST24). Thereby, the first protective tube 2 and the second protective tube 3 are connected along the electric wire 5. In this case, the first annular member 24 and the second annular member 33 are connected by the bending portion 5e. In addition, although the example which connects the 1st protective pipe 2 and the 2nd protective pipe 3 was shown in FIG. 7, you may connect three or more protective pipes.

  As described above, the method of attaching the protective tube 1 according to the present embodiment is a method of attaching the protective tube 1 to the electric wire 5 having the curved portion 5e, and the electric wire 5 includes the first portion 5c and the second portion. 5d and a curved portion 5e provided between the first portion 5c and the second portion 5d. The first portion 5c and the second portion 5d have a radius of curvature that is greater than the radius of curvature of the curved portion 5e. The attachment method of the protection tube 1 corresponds to the step of attaching the first protection tube 2 having a length corresponding to the length of the first portion 5c to the first portion 5c (step ST22) and the length of the second portion 5d. Attaching the second protective tube 3 having a length to the second portion 5d (step ST23), moving the first protective tube 2 and the second protective tube 3 along the electric wire 5, and the first protective tube 2 The first annular member 24 provided at the end of the second protective member 3 and the second annular member 33 provided at the end of the second protective tube 3 are connected to the connecting portions (the first connecting portion 25 and the second connecting portion 25). And a step of connecting via the connecting portion 36) (step ST24).

  According to this, the 1st protective tube 2 and the 2nd protective tube 3 can be attached to the electric wire 5 according to each length of the 1st part 5c of the electric wire 5, and the 2nd part 5d. The first protective tube 2 and the second protective tube 3 are attached to the first portion 5c and the second portion 5d having a large curvature radius. That is, when attaching the first protective tube 2 and the second protective tube 3, it is not necessary to deform the first protective tube 2 and the second protective tube 3 into a shape corresponding to the curved portion 5e having a small radius of curvature. For this reason, the protective tube 1 can be easily attached to the electric wire 5. Moreover, the damage of the electric wire by contact with the curved part 5e of the electric wire 5 and the protective tube 1 can be suppressed.

  Moreover, the attachment method of the protection pipe | tube 1 of this embodiment is provided with the clearance gap part SP between the edge parts of the circumferential direction of the sheet | seat member bent so that internal space might be made inside, and both ends open. 1 pipe part 21 is prepared, the step (step ST12) which cuts the 1st pipe part 21 according to the length of electric wire 5, and the annular 1st annular member 24 elastically energized in the direction which closes gap part SP. Attaching to the end of the first pipe part (step ST13).

  According to this, it is easy to cut | disconnect the 1st pipe part 21 and to adjust it to suitable length. Therefore, the protective tube 1 can be easily attached to the electric wire 5, and the protective tube 1 can be reused for the electric wires 5 having different lengths.

  As mentioned above, although embodiment of this invention was described, this invention is not limited with the content of this embodiment, It can change suitably. For example, the first tube portion 21 and the second tube portion 31 are circular when viewed from the axial direction, but may be other shapes such as a polygonal shape. Moreover, the 1st pipe part 21 and the 2nd pipe part 31 may have a different diameter. Even in this case, the first tube portion 21 and the second tube portion 31 can be connected via the first annular member 24 and the second annular member 33.

DESCRIPTION OF SYMBOLS 1 Protective pipe 2, 2A 1st protective pipe 3, 3A 2nd protective pipe 5 Electric wire 5a, 5b End part 5c 1st part 5d 2nd part 5e Bending part 21 1st pipe part 21a, 21b End part 22 1st support member 22a, 22b End portion 23 Opening / closing member 24 First annular member 24a, 24b End portion 25 First connecting portion 26 Fourth annular member 31 Second pipe portion 32 Second support member 33 Second annular member 34 Third annular member 36 First 2 connection part 38 3rd connection part 100 transformer 231 ring part 231a, 231b end part 232 extension part 233a, 233b opening / closing member connection part 251, 361 base member 252 convex part 362 convex part 362a opening 362b concave part

Claims (6)

A protective tube made of non-conductive material and attached to the electric wire,
A gap between the circumferential ends of the sheet member that is bent so that an internal space is formed inside, a first pipe portion that is open at both ends,
A plurality of support members provided on an inner peripheral surface of the first pipe portion and arranged along an extending direction of the gap portion;
An annular first annular member that is detachably provided at at least one end of the first pipe portion and is elastically biased in a direction of closing the gap portion;
A protective pipe having a first connection portion provided on the first annular member and connectable to an annular member provided on another pipe portion. An annular opening / closing member that is elastically biased in a direction to close the gap is provided at the other end of the first pipe portion,
The opening / closing member has a ring portion and a pair of extending portions,
The ring part is provided with a gap in a part in the circumferential direction, and is provided to surround the outer periphery of the first pipe part,
The pair of extending portions is provided at each of the end portions of the ring portion facing each other with the gap therebetween, and extends outward in the radial direction.
The protective tube according to claim 1, wherein an opening / closing member connecting portion that connects the pair of extending portions is provided on at least one of the opposing surfaces of the pair of extending portions. A second pipe part in which a gap part is provided between the end parts in the circumferential direction of the sheet member bent so that an internal space is formed inside, and both ends are open,
A plurality of second support members provided on an inner peripheral surface of the second pipe portion and arranged along the extending direction of the gap portion;
An annular second annular member that is detachably provided at at least one end of the second pipe portion and is elastically biased in a direction of closing the gap portion;
The protective tube according to claim 1, further comprising: a second connection portion that is provided on the second annular member and can be connected to the first connection portion. One of the first connection part or the second connection part has a convex part protruding in the extending direction of the gap part,
The other side of the said 1st connection part or the said 2nd connection part is a protection pipe | tube of Claim 3 which has a recessed part which meshes with the said convex part. A method of attaching a protective tube to an electric wire having a curved portion,
The electric wire includes a first portion, a second portion, and the curved portion provided between the first portion and the second portion, and the first portion and the second portion are: Having a radius of curvature larger than the radius of curvature of the curved portion,
Attaching a first protective tube having a length corresponding to the length of the first portion to the first portion;
Attaching a second protective tube having a length corresponding to the length of the second portion to the second portion;
The first guard pipe and the second guard pipe are moved along the electric wire, and the first annular member provided at the end of the first guard pipe and the end of the second guard pipe are provided. Connecting the second annular member to each other via a connecting portion provided on each of the second annular members. A sheet member bent so as to form an internal space on the inside is provided with a gap between the circumferential ends, and a tube having both ends opened is prepared. Cutting according to,
The method for attaching a protective tube according to claim 5, further comprising: attaching an annular member that is elastically biased in a direction to close the gap portion to an end portion of the tube portion.

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