JP2019139866A - Corrugated tube-attached electric wire and corrugated tube - Google Patents

Abstract

To provide a technology that can make it easy to attach a corrugated tube to an electric wire.SOLUTION: The corrugated tube-attached electric wire 10 includes an electric wire 12 and a corrugated tube 20 covering the electric wire 12. The corrugated tube 20 comprises a tube main body portion 22 formed in a shape in which an annular convex portion 23 and an annular concave portion 24 are alternately continued along the axial direction. The corrugated tube 20 is formed with a slit S that extends spirally from one end to the other end of the tube main body 22.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for attaching a corrugated tube to an electric wire.

  Patent Document 1 discloses a technique for fitting an electric wire into the corrugated tube by pushing the electric wire into the slit forming portion when attaching the corrugated tube divided by a slit extending linearly along the tube axis direction to the electric wire. doing.

JP 2017-55541 A

  However, in the technique described in Patent Document 1, it is necessary to accurately push the electric wire into the slit forming portion while holding the corrugated tube.

  Then, an object of this invention is to provide the technique which can make it easy to attach a corrugated tube to an electric wire.

  In order to solve the above problem, the corrugated tube-attached electric wire according to the first aspect includes a tube main body formed in a shape in which annular convex portions and annular concave portions are alternately continuous along the axial direction. A corrugated tube in which a slit extending in a spiral shape from one end to the other end is formed, and an electric wire covered with the corrugated tube.

  The electric wire with a corrugated tube according to the second aspect is an electric wire with a corrugated tube according to the first aspect, and further includes a connecting portion that connects portions separated by the slit in the tube main body portion.

  The electric wire with a corrugated tube according to a third aspect is an electric wire with a corrugated tube according to the second aspect, and the connecting portion includes a resin cured portion in which the resin is cured.

  The electric wire with a corrugated tube which concerns on a 4th aspect is an electric wire with a corrugated tube which concerns on a 3rd aspect, Comprising: The said resin contains a thermoplastic resin.

  The electric wire with a corrugated tube according to a fifth aspect is the electric wire with a corrugated tube according to the third or fourth aspect, wherein the tube main body portion is bent in at least a part of the portion where the resin cured portion is formed. It is maintained in shape.

  The electric wire with a corrugated tube according to a sixth aspect is the electric wire with a corrugated tube according to any one of the second to fifth aspects, and the connecting portion has an adhesive tape wound around the tube main body. Including tape winding part.

  The corrugated tube according to the seventh aspect includes a tube main body portion formed in a shape in which annular convex portions and annular concave portions are alternately continuous along the axial direction, from one end portion to the other end portion of the tube main body portion. A slit extending in a spiral shape is formed.

  A corrugated tube according to an eighth aspect is the corrugated tube according to the seventh aspect, further comprising a resin portion in which a thermoplastic resin is provided on at least one of an outer surface and an inner surface of the tube main body portion, The slit is also formed in the resin portion.

  According to each aspect, a corrugated tube can be easily attached to the circumference | surroundings of an electric wire by winding a tube main-body part around an electric wire helically.

  According to the 2nd aspect, the opening part of the part in which the slit was formed in the tube main-body part can be suppressed by the connection part.

  According to the 3rd aspect, resin can be hardened and a connection part can be formed.

  According to the fourth aspect, the thermoplastic resin can be melted and then cured to form the connecting portion. In this case, the thermoplastic resin can be provided first on the corrugated tube before being attached to the electric wire.

  According to the 5th aspect, path | route regulation can be performed by the resin hardening part.

  According to the 6th aspect, an adhesive tape can be wound and a connection part can be formed.

  According to the 8th aspect, the tube main-body part with which the resin part was attached can be helically wound around an electric wire. Moreover, after winding the tube main-body part with the resin part around the electric wire, the thermoplastic resin can be flowed by heating. And it can suppress that the opening | mouth of a slit opens by hardening a thermoplastic resin in the state which connected the part separated by the slit.

It is a top view which shows the electric wire with a corrugated tube which concerns on 1st Embodiment. It is the longitudinal cross-sectional view cut | disconnected along the II-II line | wire of FIG. It is explanatory drawing which shows a mode that the electric wire with a corrugated tube which concerns on 1st Embodiment is manufactured. It is explanatory drawing which shows a mode that the electric wire with a corrugated tube which concerns on 1st Embodiment is manufactured. It is a top view which shows the electric wire with a corrugated tube which concerns on 2nd Embodiment. It is explanatory drawing which shows a mode that the electric wire with a corrugated tube which concerns on 2nd Embodiment is manufactured. It is a longitudinal cross-sectional view which shows the electric wire with a corrugated tube which concerns on a 1st modification. It is a longitudinal cross-sectional view which shows an example of the corrugated tube used for manufacture of the electric wire with a corrugated tube which concerns on a 1st modification. It is a longitudinal cross-sectional view which shows the electric wire with a corrugated tube which concerns on a 2nd modification.

{First embodiment}
Hereinafter, the electric wire with a corrugated tube which concerns on 1st Embodiment is demonstrated. Drawing 1 is a top view showing electric wire 10 with a corrugated tube concerning a 1st embodiment. FIG. 2 is a longitudinal sectional view taken along line II-II in FIG. For ease of understanding, the connecting portion 40 is indicated by a phantom line in FIG. 1, whereas it is indicated by a solid line in FIG.

  The corrugated tube-attached electric wire 10 includes an electric wire 12 and a corrugated tube 20 that covers the electric wire 12. The electric wire 10 with a corrugated tube further includes a connecting portion 40.

  The electric wire 12 is used as a wiring member that connects devices mounted on a vehicle, for example. One or a plurality of electric wires 12 are included. The electric wire 12 is an insulated wire including, for example, a core wire and an insulating coating that covers the core wire. The core wire includes one or more strands formed of a conductive material such as copper, copper alloy, aluminum, or aluminum alloy. The insulating coating is formed by extruding a resin such as PE (polyethylene) or PVC (polyvinyl chloride) around the core wire, or applying a resin paint such as enamel around the core wire.

  The corrugated tube 20 includes a tube main body 22. The tube main body portion 22 is formed in a so-called bellows shape in which the annular convex portions 23 and the annular concave portions 24 are alternately continued along the axial direction. Each of the annular convex portion 23 and the annular concave portion 24 is an annular shape that is connected one round. Accordingly, the annular convex portion 23 and the annular concave portion 24 do not extend in a spiral shape. The tube main body portion 22 is an integrally molded product made of, for example, PP (polypropylene).

  The corrugated tube 20 is formed with a slit S that extends spirally from one end to the other end of the tube main body 22. The slits S are formed so as to circulate around the tube main body 22 a plurality of times from one end to the other end of the tube main body 22. In the example shown in FIG. 1, the slit S is formed in a clockwise direction, but may be formed in a counterclockwise direction. Since each of the annular convex portion 23 and the annular concave portion 24 is formed in an annular shape that is connected one round, the slit S is formed so as to obliquely cross each of the annular convex portion 23 and the annular concave portion 24.

  Below, let the dimension of a pair of adjacent annular convex part 23 and annular recessed part 24 along the longitudinal direction of the tube main-body part 22 be 1 pitch of the tube main-body part 22. FIG. Further, a dimension along the longitudinal direction of the tube main body portion 22 when the slit S makes one round around the tube main body portion 22 is defined as one pitch of the slit S.

  In the example shown in FIG. 1, one pitch of the slits S is formed to correspond to two pitches of the tube main body portion 22. However, one pitch of the slits S may be formed shorter than two pitches of the tube main body 22 such as one pitch of the tube main body 22. Further, one pitch of the slits S may be formed longer than two pitches of the tube main body part 22 such as three pitches of the tube main body part 22. At this time, one pitch of the slits S may not be an integral multiple of one pitch of the tube main body 22.

  In the example shown in FIG. 1, the slits S are formed at a constant pitch from one end portion to the other end portion of the tube main body portion 22, but the slits S may be guarded so that the pitch changes midway. .

  The connecting part 40 connects the parts separated by the slits S in the tube main body part 22. Here, the connecting portion 40 includes a resin cured portion 42 in which the resin is cured.

  The resin curing part 42 is provided on the outer surface of the tube main body part 22 so as to straddle the slit S. At this time, the resin curing portion 42 includes a plurality of first portions 43 that enter the outer surface of each annular recess 24 and a second portion 44 that connects the first portions 43. Accordingly, the second portion 44 has a portion covering the outside of each annular convex portion 23. More specifically, the first portion 43 completely fills the gap between the adjacent annular convex portions 23 generated on the outer surface of the annular concave portion 24. The second portion 44 is also uniformly formed on the outer peripheral side of the first portion 43.

  The first portion 43 is formed over the entire circumference of the annular recess 24. For this reason, the first portion 43 is formed in an annular shape. But the 1st part 43 does not need to be formed in cyclic | annular form. However, the first portion 43 may be formed around the annular recess 24 over a range larger than 180 degrees. Thereby, it becomes difficult for the first portion 43 to come out of the annular recess 24.

  Similarly, the second portion 44 is formed over the entire circumference of the annular recess 24 and the annular projection 23. For this reason, the second portion 44 is formed in an annular shape. However, the second portion 44 may not be formed in an annular shape.

  Here, the outer peripheral surface of the second portion 44 is flat along the longitudinal direction of the tube main body 22. But the outer peripheral surface of the 2nd part 44 may be formed so that the uneven | corrugated shape according to the uneven | corrugated shape of the tube main-body part 22 may be exhibited. For example, when the resin constituting the resin cured portion is formed so that the thickness of the resin is substantially constant along the longitudinal direction of the tube main body 22, the outer peripheral surface of the second portion corresponds to the uneven shape of the tube main body 22. Exhibits an uneven shape. The cured resin portion formed in such a concavo-convex shape is easier to bend than when formed in the shape of FIG.

  The resin cured portion 42 is formed softer than the tube main body portion 22 and has flexibility even in the shape of FIG. For this reason, even if the resin hardening part 42 is provided, the electric wire 10 with a corrugated tube can be bent in the part in which the resin hardening part 42 is provided. Here, the electric wire 10 with a corrugated tube is formed in a straight line shape, and the portion provided with the resin cured portion 42 can be bent by applying an external force. And the part in which the resin hardening part 42 was provided returns to the original linear form by the said external force being removed.

  The resin constituting the resin cured portion 42 includes a thermoplastic resin. Accordingly, the corrugated tube 20 before the resin 12 is covered with the resin can be provided in advance. This will be described in detail in the manufacturing method described later.

  The resin curing part 42 may be bonded to the tube main body part 22 or may not be bonded. Even when the resin cured portion 42 is not bonded to the tube main body portion 22, the resin cured portion 42 includes the first portion 43, so that the resin cured portion 42 is prevented from being detached from the tube main body portion 22.

  As such a thermoplastic resin, for example, ethylene vinyl acetate copolymer resin or the like can be employed.

<Manufacturing method>
FIG. 3 and FIG. 4 are explanatory views showing a state in which the corrugated tube-attached electric wire 10 according to the first embodiment is manufactured.

  In manufacturing the electric wire 10 with a corrugated tube, first, the electric wire 12 and the corrugated tube 20A are prepared. In addition, below, the corrugated tube before mounting | wearing with the electric wire 12 is called the corrugated tube 20A, and may be distinguished from the corrugated tube 20 in the electric wire 10 with a corrugated tube. The corrugated tube 20 </ b> A is formed with a slit S that extends in a spiral shape from one end to the other end of the tube main body 22.

  At this time, the resin part 30 is formed in the corrugated tube 20A here. The resin portion 30 is formed by providing a thermoplastic resin on the outer surface of the tube main body portion 22. In the corrugated tube 20 </ b> A, a slit S is also formed in the resin portion 30. Accordingly, the corrugated tube 20 </ b> A includes the tube main body portion 22 and the resin portion 30. And the slit S is formed in both the tube main-body part 22 and the resin part 30 over the whole longitudinal direction of the corrugated tube 20A.

  For example, after forming the resin part 30 by applying a thermoplastic resin to the outer surface of the tube main body 22 before the slit S is formed, the resin is obtained by forming the slit S in the tube main body 22 with the resin part 30. The corrugated tube 20 </ b> A in which the slits S are formed in both the portion 30 and the tube main body portion 22 can be formed. For example, the corrugated tube 20A in which the slit S is also formed in the resin portion 30 can be obtained by applying a thermoplastic resin so as not to block the slit S on the outer surface of the tube main body portion 22 after the slit S is formed. Can be formed.

  The resin part 30 is provided such that a first part 33 and a second part 34 corresponding to the first part 43 and the second part 44 in the resin curing part 42 are generated. At this time, the resin portion 30 may be bonded to the tube main body portion 22 or may not be bonded. Even when the resin part 30 is not bonded to the tube main body part 22, the first part 33 is provided, so that the resin part 30 is prevented from coming off from the tube main body part 22. However, in the corrugated tube 20A, since the slit S is formed in the resin portion 30, the resin portion 30 is separated from the tube main body portion 22 than the resin cured portion 42 in the electric wire 10 with a corrugated tube, or the end portion is turned up. It is easy to do. At this time, if the resin part 30 is bonded to the tube main body part 22, even if the slits S are formed, it is difficult for the resin part 30 to be detached from the tube main body part 22 or to be turned up.

  Once the electric wire 12 and the corrugated tube 20A are prepared, the electric wire 12 is then covered with the corrugated tube 20A. At this time, since the spiral slit S is formed in the tube main body portion 22 and the resin portion 30, the corrugated tube 20 </ b> A can be wound around the electric wire 12. For example, as shown in FIG. 3, after one end of the corrugated tube 20 </ b> A is covered with the electric wire 12, the corrugated tube 20 </ b> A on the other end side is rotated around the electric wire 12, thereby Can be wound.

  If the electric wire 12 is covered with the corrugated tube 20A, the resin part 30 is then heated. For example, as shown in FIG. 4, the resin part 30 is heated using a heating device 80 such as a heater. The heated resin portion 30 becomes fluid, and eventually the portions of the resin portion 30 separated by the slits S are connected.

  Thereafter, the resin portion 30 is cooled and cured. Thereby, the said electric wire 10 with a corrugated tube in which the slit S of the tube main-body part 22 was connected by the resin hardening part 42 is completed. Note that the corrugated tube 120A may be positioned with respect to the electric wire 12 by positioning means (not shown) such as an adhesive tape.

  According to the electric wire 10 with a corrugated tube configured as described above, the corrugated tube 20 can be easily attached around the electric wire 12 by winding the tube main body portion 22 around the electric wire 12 in a spiral shape. . At this time, the slit S can be formed in the general-purpose tube main body 22 to form the corrugated tube 20.

  Further, the opening of the portion where the slit S is formed in the tube main body portion 22 can be suppressed by the connecting portion 40. At this time, the resin can be cured to form the resin cured portion 42 as the connecting portion 40. In particular, the resin cured portion 42 can be formed by melting and then curing the thermoplastic resin. In this case, the resin part 30 containing a thermoplastic resin can be provided in advance in the corrugated tube 20 </ b> A before being attached to the electric wire 12.

  Then, by using the corrugated tube 20 </ b> A with the resin part 30, the tube main body part 22 with the resin part 30 can be spirally wound around the electric wire 12. Moreover, after winding the tube main-body part 22 with the resin part 30 around the electric wire 12, a thermoplastic resin can be made to flow by heating. And the resin hardening part 42 can be formed by hardening the thermoplastic resin in the state which connected the part separated by the slit S, and it can suppress that the opening | mouth of the slit S opens.

  Moreover, since the resin hardening part 42 is provided in the outer surface side of the tube main-body part 22, adhesion to the electric wire 12 is suppressed. Since the resin cured portion 42 has flexibility, it is possible to suppress the state where the resin cured portion 42 covers the slit S when the corrugated tube-attached electric wire 10 is bent. Thereby, when the electric wire 10 with a corrugated tube is bent, it is possible to suppress the electric wire 12 from jumping out of the slit S.

{Second Embodiment}
The electric wire with a corrugated tube according to the second embodiment will be described. FIG. 5 is a plan view showing the corrugated tube-attached electric wire 110 according to the second embodiment. Drawing 6 is an explanatory view showing signs that corrugated tube-attached electric wire 110 concerning a 2nd embodiment is manufactured. In the following description, the same reference numerals are given to the same components as those described so far, and the description thereof is omitted.

  In the corrugated tube-attached electric wire 110, the member constituting the connecting portion 140 is different from the member constituting the connecting portion 40 in the corrugated tube-attached electric wire 10.

  The connecting part 140 includes a tape winding part 50. The tape winding part 50 is formed by winding an adhesive tape 52 around the tube body part 22.

  In this case, as the corrugated tube 120A before being attached to the electric wire 12, it is conceivable to use a corrugated tube 120A in which the slit S is formed in the tube main body portion 22 and in which the resin portion 30 is not formed. .

  In manufacturing the electric wire 110 with the corrugated tube, the corrugated tube 120A is first wound around the electric wire 12. Thereafter, as shown in FIG. 6, an adhesive tape 52 is wound around the electric wire 12. The adhesive tape 52 is wound around the slit S. Thereby, it can control that the mouth of slit S opens in electric wire 110 with a corrugated tube.

  At this time, the adhesive tape 52 may be spirally wound from one end to the other end of the corrugated tube 120A, or a partial winding that is wound only in the circumferential direction instead of being spirally wound. It may be applied at one place or a plurality of places along the longitudinal direction. When the adhesive tape 52 is spirally wound, the winding method may be a winding method in which adjacent adhesive tapes 52 such as so-called rough winding are spaced apart from each other, or adjacent adhesives such as so-called double winding. The winding method may be such that the tapes 52 overlap each other. In the example shown in FIG. 5, the adhesive tape 52 is wound in a winding manner in which adjacent adhesive tapes 52 overlap each other. Thereby, the exposure of the slit S is suppressed.

  When the adhesive tape 52 is wound in a spiral shape, the spiral direction of the adhesive tape 52 may be the same as or different from the spiral direction of the slit S. That is, both the spiral direction of the adhesive tape 52 and the spiral direction of the slit S may be right-handed or left-handed, or one of the spiral direction of the adhesive tape 52 and the spiral direction of the slit S. May be right-handed and the other may be left-handed. In the example shown in FIG. 5, the spiral direction of the adhesive tape 52 is the same as the right direction as the spiral direction of the slit S.

  The adhesive tape 52 is usually attached to the outer peripheral surface of the annular convex portion 23 and wound around the annular concave portion 24.

  According to the electric wire 110 with a corrugated tube formed in this way, the tape winding portion 50 as the connecting portion 40 can be formed by winding the adhesive tape 52 around the corrugated tube 120A.

{First modification}
FIG. 7 is a longitudinal sectional view showing an electric wire 210 with a corrugated tube according to a first modification. FIG. 8 is a longitudinal sectional view showing an example of a corrugated tube 220A used for manufacturing the corrugated tube-attached electric wire 210 according to the first modification.

  In the corrugated tube-attached electric wire 210, the connecting portion 240 is provided on the inner surface of the tube main body portion 22. The connection part 240 is the resin hardening part 242 where resin hardened | cured.

  The resin curing portion 242 includes a plurality of first portions 243 that enter the inner peripheral surface of each annular protrusion 23 and a second portion 244 that connects the first portions 243. Accordingly, the second portion 244 has a portion covering the inside of each annular recess 24. More specifically, the first portion 243 completely fills the gap between the adjacent annular recesses 24 formed on the inner surface of the annular projection 23. The second portion 244 is also uniformly formed on the inner peripheral side of the first portion 243.

  The first portion 243 is formed over the entire inner periphery of the annular recess 24. For this reason, the first portion 243 is formed in an annular shape. But the 1st part 243 does not need to be formed in cyclic | annular form.

  Similarly, the second portion 244 is formed over the entire inner periphery of the annular recess 24 and the annular projection 23. For this reason, the second portion 244 is formed in an annular shape. However, the second portion 244 may not be formed in an annular shape.

  Here, the inner peripheral surface of the second portion 244 is flat along the longitudinal direction of the tube main body 22. But the inner peripheral surface of the 2nd part 244 may be formed so that the uneven | corrugated shape according to the uneven | corrugated shape of the tube main-body part 22 may be exhibited. For example, when the thickness of the resin constituting the connecting portion 240 is formed so as to be substantially constant along the longitudinal direction of the tube main body portion 22, the inner peripheral surface of the second portion 244 is formed in an uneven shape of the tube main body portion 22. Appropriate uneven shape is exhibited.

  In manufacturing the corrugated tube-attached electric wire 210, for example, a corrugated tube 220A shown in FIG. 8 can be used.

  In the corrugated tube 220 </ b> A, a resin portion 230 is formed on the inner surface of the tube main body portion 22. The resin portion 230 is formed by providing a thermoplastic resin on the inner surface of the tube main body portion 22. In the corrugated tube 220 </ b> A, a slit S is also formed in the resin portion 230. For example, after forming the resin part 230 by applying a thermoplastic resin to the inner surface of the tube main body part 22 before the slit S is formed, the resin is obtained by forming the slit S in the tube main body part 22 with the resin part 230. A corrugated tube 220A having slits S in both the portion 230 and the tube main body portion 22 can be formed. Further, for example, by applying a thermoplastic resin so that the slit S is not blocked on the inner surface of the tube main body portion 22 after the slit S is formed, the corrugated tube 220A having the slit S also in the resin portion 230 is formed. Can be formed.

  The resin part 230 is provided such that a first part 233 and a second part 234 corresponding to the first part 243 and the second part 244 in the resin curing part 242 are generated. At this time, the resin portion 230 may be bonded to the tube main body portion 22 or may not be bonded. Even when the resin part 230 is not bonded to the tube main body part 22, the first part 243 is provided, so that the resin part 230 is prevented from being detached from the tube main body part 22. However, in the corrugated tube 220A, since the slit S is formed in the resin portion 230, the resin portion 230 is separated from the tube main body portion 22 than the resin cured portion 242 in the electric wire 210 with corrugated tube, or the end portion is turned up. It is easy to do. At this time, if the resin part 230 is bonded to the tube main body part 22, even if the slit S is formed, it is difficult for the resin part 230 to be detached from the tube main body part 22 or to be turned up.

  When the resin cured portion is provided on the inner surface of the tube main body portion 22, the resin cured portion may be in contact with the electric wire 12 or may not be in contact. For example, when the resin cured portion is uniformly formed on the inner peripheral surface of the annular recess 24 like the resin cured portion 242, the resin cured portion comes into contact with the electric wire 12. On the other hand, for example, when the resin cured portion is formed only on the radially outer peripheral surface of the annular convex portion 23, the resin cured portion does not contact the electric wire 12. When the resin cured portion is in contact with the electric wire 12, the resin cured portion may be bonded to the electric wire 12 or may not be bonded. When the resin cured portion is bonded to the electric wire 12, the electric wire 12 and the corrugated tube 20 can be positioned.

{Second modification}
FIG. 9 is a longitudinal sectional view showing an electric wire 310 with a corrugated tube according to a second modification.

  In the corrugated tube-attached electric wire 310 according to the second modification, a cured resin portion 342 is formed as the connecting portion 340. And the tube main-body part 22 is maintained in the curved shape in at least one part of the part in which the resin hardening part 342 was formed. Here, a resin cured portion 342 is formed on the outer surface side of the tube main body portion 22. In this case, for example, after covering the electric wire 12 with the corrugated tube 20 </ b> A with the resin portion 30, the resin portion 30 is heated while the tube main body portion 22 is bent at a portion including the resin portion 30. As a result, the resin cured portion 342 is formed into a bent shape by curing the resin portion 30 that is flowed and joined. As a result, the tube main body portion 22 can be maintained in a bent shape at the portion where the resin cured portion 342 is formed. Thus, according to the electric wire 310 with a corrugated tube, the path can be regulated by the resin curing part 342.

  When path regulation is performed by the resin curing part 342, the resin curing part 342 may be formed so as to be capable of bending deformation or may be formed so as not to be able to be bent, but is made of a relatively hard resin that is difficult to bend and deform. Preferably it is formed. At this time, the corrugated tube-attached electric wire may be linearly regulated.

  Further, the path regulation may be performed by a resin curing portion formed on the inner surface side of the tube main body portion 22. In this case, for example, after covering the electric wire 12 with the corrugated tube 220A with the resin portion 230, the resin portion 230 is heated while the tube main body portion 22 is bent at the portion including the resin portion 230. As a result, the resin portion 230 that is flowed and joined is cured, so that the resin cured portion is formed into a bent shape.

{Other variations}
Although it has been described so far that the connecting portions 40, 140, 240, and 340 are provided, this is not an essential configuration. There may be a case where the connecting portion is not provided in the electric wire with the corrugated tube. That is, the electric wire 12 may be covered with the corrugated tube 120A without the resin portions 30 and 230, and the electric wire 12 may be an electric wire with a corrugated tube without the connecting portions 40, 140, 240, and 340 being provided. In this case, the corrugated tube 120A may be positioned with respect to the electric wire 12 by positioning means such as an adhesive tape.

  So far, it has been described that the resin cured portions 42, 242 and 342 are formed on either the outer surface or the inner surface of the tube body portion 22, but the resin cured portions 42, 242 and 342 may be formed.

  Moreover, the resin hardening part may be formed in the side end surface produced by forming the slit S in the tube main-body part 22. FIG. That is, the portion separated by the slits S in the tube main body portion 22 may be opposed to each other with an interval, and the resin cured portion may be formed so as to fill this gap. At this time, in the electric wire with a corrugated tube, in addition to at least one of the outer surface and the inner surface of the tube main body portion 22, a resin cured portion may be formed on the side end surface, and the resin cured portion is formed only on the side end surface. It may be formed. In the former case, for example, after the resin is provided on the outer surface or the inner surface of the tube body 22 with the gap between the opposing side end surfaces, the flowing resin reaches the gap from the outer surface or the inner surface of the tube body 22. It is thought that it is formed. In the latter case, it is considered that the resin is applied only to the side end face. In the latter case, the resin cured portion 42 may be formed by an adhesive having a strong adhesive force with the tube main body portion 22.

  So far, it has been described that the resin constituting the cured resin portions 42, 242, and 342 includes a thermoplastic resin, but this is not an essential configuration. For example, the resin curing parts 42, 242 and 342 involve an irreversible reaction to change the state from a fluid state to a cured state, such as a moisture curable resin, an ultraviolet curable resin, a thermosetting resin, and a two-component curable resin. It may contain a resin. In this case, after the corrugated tube 120A without the resin portions 30 and 230 is wound around the electric wire 12, it is preferable to apply and cure these resins.

  Further, even when the resin constituting the cured resin portions 42, 242, and 342 includes a thermoplastic resin, the corrugated tube 120A without the resin portions 30 and 230 is covered with the electric wire 12, and then the fluid thermoplastic resin is corrugated. The resin cured portions 42, 242 and 342 may be formed by curing the thermoplastic resin in a state where the portions separated by the slits S are applied to the tube 120A.

  For example, in the case of the corrugated tube-attached electric wires 10 and 310 in which the resin cured portions 42 and 342 are formed on the outer surface of the tube main body portion 22, it may be manufactured as follows. That is, after the corrugated tube 120A in which the resin parts 30 and 230 are not provided is covered around the electric wire 12, a thermoplastic resin is provided around the corrugated tube 120A. And the thermoplastic resin provided in the circumference | surroundings of the corrugated tube 120A is hardened, and the resin hardening parts 42 and 342 are formed. At this time, the thermoplastic resin provided around the corrugated tube 120A may be in a cured state that requires heating or in a fluid state that does not require heating. In the former case, for example, it is conceivable that a hot melt film or hot melt tape in which a hot melt resin is cured in a sheet shape is wound around the electric wire 12. In the latter case, it is conceivable that, for example, a heated and fluidized thermoplastic resin is applied around the electric wires 12. In this case, it is conceivable that the fluidized thermoplastic resin permeates between the plurality of electric wires 12 and hardens together to stop the line.

  Further, for example, in the case of the corrugated tube-attached electric wire 210 in which the resin cured portion 242 is formed on the inner surface of the tube main body portion 22, it may be manufactured as follows. That is, a thermoplastic resin is provided around the electric wire 12. And after covering the corrugated tube 120A in which the resin parts 30 and 230 are not provided in the circumference | surroundings, the thermoplastic resin provided in the circumference | surroundings of the electric wire 12 is hardened, and the resin hardening part 242 is formed. At this time, the thermoplastic resin provided around the electric wire 12 may be in a cured state that requires heating or in a fluid state that does not require heating. In the former case, for example, it is conceivable that a hot melt film or hot melt tape in which a hot melt resin is cured in a sheet shape is wound around the electric wire 12. In the latter case, for example, it is conceivable that the corrugated tube 120A is covered before the thermoplastic resin that has been heated and fluidized is applied around the electric wire 12 and the thermoplastic resin is not cured. When the thermoplastic resin is provided around the electric wires 12, it becomes possible to perform the line stop water together by hardening the fluid thermoplastic resin in a state where it penetrates between the electric wires 12.

  Moreover, although the resin hardening part 42 has demonstrated as what contains both the 1st part 43 and the 2nd part 44, this is not an essential structure. For example, when the corrugated tube-attached electric wire 10 is disposed in a portion where some opening of the slit S is allowed, the resin cured portion 42 includes only one of the first portion 43 and the second portion 44. There may be cases. The same applies to the resin cured portions 242 and 342.

  In addition, each structure demonstrated by said each embodiment and each modification can be suitably combined unless it mutually contradicts. For example, the resin curing portions 42, 242, and 342 and the tape winding portion 50 may be used in combination as the connection portion.

  As described above, the present invention has been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Electric wire with corrugated tube 12 Electric wire 20 Corrugated tube 22 Tube main-body part 23 Annular convex part 24 Annular recessed part 30 Resin part 40 Connection part 42 Resin hardening part 43 1st part 44 2nd part 50 Tape winding part 52 Adhesive tape 80 Heating device S slit

Claims (8)

Including a tube main body portion formed in a shape in which the annular convex portions and the annular concave portions are alternately continuous along the axial direction, and a slit extending spirally from one end portion to the other end portion of the tube main body portion is formed. Corrugated tube,
An electric wire covered with the corrugated tube;
An electric wire with a corrugated tube. It is an electric wire with a corrugated tube of Claim 1,
An electric wire with a corrugated tube, further comprising a connecting portion for connecting portions separated by the slit in the tube main body portion. It is an electric wire with a corrugated tube according to claim 2,
The connecting portion is an electric wire with a corrugated tube, including a cured resin portion in which the resin is cured. It is an electric wire with a corrugated tube according to claim 3,
The resin is an electric wire with a corrugated tube, including a thermoplastic resin. It is an electric wire with a corrugated tube according to claim 3 or claim 4,
An electric wire with a corrugated tube, wherein the tube main body portion is maintained in a bent shape in at least a part of a portion where the resin cured portion is formed. It is an electric wire with a corrugated tube given in any 1 paragraph of Claims 2-5,
The connecting portion is an electric wire with a corrugated tube, including a tape winding portion in which an adhesive tape is wound around the tube body.   Including a tube main body portion formed in a shape in which the annular convex portions and the annular concave portions are alternately continuous along the axial direction, and a slit extending spirally from one end portion to the other end portion of the tube main body portion is formed. Corrugated tube. The corrugated tube according to claim 7,
Further comprising a resin portion provided with a thermoplastic resin on at least one of the outer surface and the inner surface of the tube body portion,
A corrugated tube in which the slit is also formed in the resin portion.

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