JP2015089143A - Exterior material for wire harness and wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire harness including an exterior material which has high path adaptability, maintains the shape by being fixed at a minimum number of positions, and achieves high airtightness.SOLUTION: An exterior material 1 includes a corrugate tube 2 and a hard pipe 3. The hard pipe 3 is formed into a pipe shape harder than the corrugate tube 2. An annular connection protruding part 31, which is fitted in an annular recessed part 21 on an inner peripheral surface of an end part of the corrugate tube 2, is formed on an outer peripheral surface of a connection part 30 of an end part of the hard pipe 3.

Description

  The present invention relates to an exterior material for a wire harness and a wire harness including the same.

  A wire harness mounted on a vehicle such as an automobile often includes a tubular exterior material that protects the electric wire. As a tubular exterior material for a wire harness, for example, a synthetic resin exterior material such as a corrugated tube and a metal exterior material such as an aluminum pipe are used.

  In the present specification, the term tube and the term pipe are properly used depending on whether or not the member has a specific structure for exhibiting flexibility such as a bellows structure.

  A corrugated tube is a tubular exterior material having flexibility by having a bellows structure. Moreover, a hard protective material capable of holding the electric wire along a predetermined path may be used as the synthetic resin exterior material. Generally, a hard protective material has a main-body part which forms the groove | channel where an electric wire is inserted, and a cover part which plugs up the opening of the groove | channel of a main-body part.

  Moreover, patent document 1 has shown the structure where the metal pipe which the high voltage electric wire penetrated, and the corrugated tube which the low voltage electric wire penetrated were connected in the parallel state by the several parallel connection member.

  In the structure shown in Patent Document 1, the metal pipe functions as an electromagnetic shielding member while protecting the high-voltage electric wire. In addition, the plurality of parallel connection members hold the flexible corrugated tube in a state along the bent metal pipe.

JP 2012 197034 A

  The corrugated tube is adaptable to various wiring routes including a curved route, that is, an exterior material having a high route adaptability. However, the corrugated tube having flexibility needs to be fixed to the support at a plurality of locations in order to maintain its shape. In the structure shown in Patent Document 1, the parallel connection member is an example of a fixing member that maintains the shape of the corrugated tube.

  For example, when a wire harness including a corrugated tube is attached under the floor of the vehicle, it is necessary to fix the corrugated tube at many locations on the lower surface of the floor in order to prevent the corrugated tube from hanging down from the lower surface of the floor.

  However, it is desirable that the number of fixing points of the exterior material is as small as possible from the viewpoint of reducing the number of steps for attaching the exterior material and cost.

  In addition, when the wire harness is used in an environment where it is exposed to flying objects such as rainwater and dust, such as under the floor of a vehicle, the clearance leading to the inside of the exterior material is small for waterproofing and dustproofing, that is, airtightness. Is desirable.

  An object of the present invention is to provide a wire harness including a highly airtight exterior material that has high path adaptability, can be maintained in shape only by being fixed at as few locations as possible.

  The exterior material for wire harnesses according to the first aspect includes a corrugated tube and a hard pipe. The corrugated tube has flexibility by having a bellows structure. The hard pipe is formed in a tubular shape that is harder than the corrugated tube. Furthermore, the connection part connected with the said corrugated tube in the state inserted in the inner side of the end part of the said corrugated tube is formed in the edge part of the said hard pipe. On the outer peripheral surface of the connecting portion of the hard pipe, an annular connecting convex portion is formed which is fitted into an annular concave portion on the inner peripheral surface of the end portion of the corrugated tube.

  The exterior material for wire harnesses according to the second aspect is an aspect of the exterior material for wire harnesses according to the first aspect. In the hard pipe of the exterior material for a wire harness according to the second aspect, the outer diameter of the open end of the connecting portion is formed smaller than the inner diameter of the annular convex portion on the inner peripheral surface of the corrugated tube. Furthermore, a plurality of the connecting convex portions are formed in the connecting portion. The remaining connecting convex portions excluding the connecting convex portion formed at least at the position farthest from the opening end in the connecting portion are back from the depth of the annular concave portion on the inner peripheral surface of the corrugated tube. Low profile projection for low profile.

  The exterior material for wire harnesses according to the third aspect is an aspect of the exterior material for wire harnesses according to the second aspect. In the exterior material for a wire harness according to the third aspect, the low profile connecting convex portion in the connecting portion of the hard pipe has an annular concave portion on the inner peripheral surface of the end portion of the corrugated tube in the width direction of the concave portion. It is inserted into the recess in a state where it is spread out.

  The exterior material for wire harnesses according to the fourth aspect is an aspect of the exterior material for wire harnesses according to the third aspect. In the exterior material for a wire harness according to the fourth aspect, the connecting convex portion formed at a position farthest from the opening end in the connecting portion of the hard pipe is taller than the other connecting convex portions. Is formed.

  The wire harness which concerns on a 5th aspect is equipped with the exterior material for wire harnesses which concerns on any one of a 1st aspect to a 4th aspect as an exterior resin material. That is, the wire harness which concerns on a 5th aspect is provided with each component shown below. The first component is a first electric wire. A 2nd component is a metal pipe which has the tubular straight pipe part along a straight line, and the tubular curved pipe part along a curve, and the said 1st electric wire penetrated. The third component is a second electric wire. The fourth component is a synthetic resin member formed in a tubular shape arranged in parallel with the metal pipe, and is an exterior resin material through which the second electric wire penetrates. The fifth component is a plurality of parallel connection members that connect the metal pipe and the exterior resin material at a plurality of locations and hold the metal pipe and the exterior resin material in a state of being arranged in parallel. The exterior resin material includes a corrugated tube and a straight tubular hard resin pipe. This hard resin pipe corresponds to the hard pipe in the exterior material for a wire harness according to any one of the first to fourth aspects, and has a straight tubular shape.

  According to each said aspect, exterior materials, such as exterior resin material, have the structure where the corrugated tube and the hard pipe were connected. Such an exterior material can be applied to various wiring paths including a curved path by selecting a combination of a corrugated tube and a hard pipe.

  For example, it is conceivable that the hard pipe is straight. It is also conceivable that a plurality of types of hard pipes having a predetermined shape that are frequently used are prepared in advance. In this case, the exterior material according to each aspect described above can be applied to a wiring route including a route that can be handled by a hard pipe having a predetermined shape and a route that is not.

  In addition, the rigid pipe can maintain a certain shape by itself. Therefore, the exterior material having a structure in which the corrugated tube and the hard pipe are connected can be maintained in shape only by being fixed at as few places as possible. As a result, it is possible to reduce the man-hour and cost for mounting the exterior material.

  Further, according to each of the above aspects, the corrugation is formed by fitting the annular connecting convex portion formed on the outer peripheral surface of the end portion of the hard pipe with the annular concave portion on the inner peripheral surface of the end portion of the corrugated tube. The tube and the hard pipe are connected. In this case, the connecting convex portion of the hard pipe that supports the inner surface of the corrugated tube prevents the inner peripheral surface of the corrugated tube from being deformed inwardly of the concave portion. Therefore, by adopting the connection structure as described above, a gap serving as an intrusion path for scattered matter is less likely to occur between the end of the hard pipe and the end of the corrugated tube due to deformation of the corrugated tube. It is possible to provide high exterior materials.

  Further, according to the second aspect, the outer diameter of the opening end of the connecting portion in the hard pipe is formed smaller than the inner diameter of the annular convex portion on the inner peripheral surface of the corrugated tube, and a plurality of connecting convex portions Of these, the connecting convex portion at least near the opening end is a low-profile connecting convex portion whose height is lower than the depth of the annular concave portion on the inner peripheral surface of the corrugated tube. In this case, it is easy to insert the end portion (connecting portion) of the hard pipe inside the end portion of the corrugated tube.

  Further, in the third aspect, the low-profile connecting convex portion of the hard pipe is fitted into the concave portion in a state where the annular concave portion on the inner peripheral surface of the end portion of the corrugated tube is expanded in the width direction of the concave portion. Yes. That is, in the third aspect, the width of the low-profile connecting convex portion is larger than the width of the concave portion on the inner peripheral surface of the corrugated tube in a natural state. In this case, the low-profile connecting convex portion and the concave portion on the inner peripheral surface of the corrugated tube are brought into close contact by the elastic force of the corrugated tube. Therefore, the airtightness of the portion where the corrugated tube and the hard pipe are connected is further increased.

  Further, in the fourth aspect, the tall connecting convex portion is deeply fitted into the concave portion of the inner peripheral surface of the corrugated tube. Therefore, the airtightness of the portion where the corrugated tube and the hard pipe are connected is further increased. Moreover, the connecting convex part taller than the others is formed at a position farthest from the opening end of the hard pipe. Therefore, when the corrugated tube and the hard pipe are connected, the tall connecting convex portion is finally inserted inside the corrugated tube in the vicinity of the opening. As a result, the tall connecting convex portion is unlikely to become a catching portion that hinders insertion of the end of the hard pipe into the corrugated tube.

  Further, the fifth aspect is a typical example of a wire harness that is attached under the floor of a vehicle, for example, and is a suitable example as an application target of the wire harness exterior material according to any one of the first to fourth aspects. .

It is a side view of exterior material 1 for wire harnesses concerning a 1st embodiment. 1 is a cross-sectional view of an exterior material 1. 1 is a schematic plan view of a wire harness 10 according to a first embodiment. It is a perspective view of the parallel connection member with which the wire harness 10 is provided. It is sectional drawing of 1 A of exterior materials which concern on 2nd Embodiment.

  Hereinafter, embodiments will be described with reference to the accompanying drawings. The following embodiment is an example embodying the present invention, and is not an example of limiting the technical scope of the present invention.

<First embodiment: exterior material>
First, the structure of the exterior material 1 for wire harnesses according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the exterior material 1 includes a corrugated tube 2 and a hard pipe 3 that are connected in a state where their respective end portions overlap each other. 1 and 2 show the exterior material 1 and the electric wire 9 that is the protection target of the exterior material 1.

  The corrugated tube 2 is a tubular member having flexibility by having a bellows structure in which concave portions and convex portions are alternately arranged in the axial direction. The corrugated tube 2 is a molded member made of a synthetic resin such as polyamide (PA), polypropylene (PP), polybutylene terephthalate (PBT), or ABS resin.

  The corrugated tube 2 is obtained, for example, by cutting a base material that is continuously formed by a combination of extrusion molding and blow molding or vacuum molding. In the corrugated tube 2 according to the present embodiment, no cut is formed in the entire axial direction (longitudinal direction) of the member.

  In the corrugated tube 2 having the bellows structure, the annular concave portion on the inner peripheral surface corresponds to an annular convex portion on the outer peripheral surface, and the annular convex portion on the inner peripheral surface corresponds to an annular concave portion on the outer peripheral surface. Therefore, on the inner side surface of the corrugated tube 2, the annular concave portions 21 and the annular convex portions 22 are formed alternately in the axial direction.

  In the following description, the annular recess 21 and the annular projection 22 mean an annular recess and a projection on the inner peripheral surface of the corrugated tube 2. In addition, the side surface on the opening end 201 side of the corrugated tube 2 in each of the annular recesses 21 is referred to as a first side surface 21x, and the opposite side surface is referred to as a second side surface 21y.

  The hard pipe 3 is a member formed in a tubular shape that is harder than the corrugated tube 2. More specifically, the hard pipe 3 is formed in a tubular shape having a constant thickness at least in most parts except for the end portion, whereby the hard pipe 3 is formed in a tubular shape that is harder than the corrugated tube 2. .

  That is, the hard pipe 3 is formed into a hard tubular shape due to a difference in shape as compared with the corrugated tube 2, and is not necessarily formed into a hard tubular shape due to a difference in material.

  A connecting portion 30 that is connected to the corrugated tube 2 while being inserted inside the end portion 20 of the corrugated tube 2 is formed at the end of the hard pipe 3. On the outer peripheral surface of the connecting portion 30, an annular connecting convex portion 31 fitted into the annular concave portion 21 of the end portion 20 of the corrugated tube 2 is formed.

  In the following description, the side surface on the opening end 301 side of the hard pipe 3 in the connecting convex portion 31 is referred to as a first side surface 31x, and the opposite side surface is referred to as a second side surface 31y.

  The hard pipe 3 in the present embodiment is a synthetic resin member such as polyamide (PA), polypropylene (PP), polybutylene terephthalate (PBT), or ABS resin. The hard pipe 3 is obtained, for example, by cutting a base material continuously formed by extrusion molding and cutting the end portion of the pipe obtained by cutting.

  In the hard pipe 3 of the present embodiment, the outer diameter of the opening end 301 of the connecting portion 30 is formed smaller than the inner diameter of the annular convex portion 22 on the inner peripheral surface of the corrugated tube 2. Therefore, the open end 301 of the connecting portion 30 can be inserted into the corrugated tube 2 without resistance.

  Furthermore, in the rigid pipe 3 of the present embodiment, the connecting portion 30 is formed with a plurality of connecting convex portions 31. In the example shown in FIGS. 1 and 2, three connecting convex portions 31 are formed side by side in the axial direction in the connecting portion 30.

  In the following description, the connecting convex portion 31 formed at the position closest to the opening end 301 in the connecting portion 30 is referred to as a first connecting convex portion 311. Further, the connecting convex portion 31 formed at the second position from the opening end 301 side in the connecting portion 30 is referred to as a second connecting convex portion 312. The connecting convex portion 31 formed at the position farthest from the opening end 301 in the connecting portion 30 is referred to as a third connecting convex portion 313.

  In the example shown in FIGS. 1 and 2, among the plurality of connecting convex portions 31, the remaining first connecting convex portions 311 and the second connecting convex portions 312 excluding the third connecting convex portion 313 are the corrugated tube 2. This is a convex portion (low-profile connecting convex portion) whose height is lower than the depth of the annular concave portion 21.

  Moreover, in the example which FIG.1, 2 shows, the 3rd connection convex part 313 is formed taller than the other connection convex part. For example, the height of the third connecting projection 313 is equal to or greater than the depth of the annular recess 21. In the example shown in FIGS. 1 and 2, the connecting convex portion 31 on the opening end 301 side is shorter than the connecting convex portion 31 on the opposite side.

  In the example shown in FIG. 2, the second side surface 31 y of each of the connecting convex portions 31 is the first side surface 21 x of the annular concave portion 21 in a state where each of the connecting convex portions 31 is fitted in each of the annular concave portions 21 of the corrugated tube 2. It is formed at an angle along. Thereby, the airtightness of the connection part 30 and the internal peripheral surface of the corrugated tube 2 increases.

  Furthermore, in the example shown in FIG. 2, the first side surface 31 x of each of the connecting convex portions 31 is an inclined surface that gradually increases from the opening end 301 side. Thereby, insertion of the connection part 30 in the corrugated tube 2 becomes easy. In the example shown in FIG. 2, the angle formed by the first side surface 31 x of each of the connecting convex portions 31 with respect to the axial direction of the hard pipe 3 is the angle formed by the second side surface 31 y with respect to the axial direction of the hard pipe 3. Smaller than.

<First Embodiment: Wire Harness>
Next, the wire harness 10 according to the first embodiment will be described with reference to FIGS. FIG. 3 is a schematic plan view of the wire harness 10. FIG. 4 is a perspective view of the parallel connection member 5 included in the wire harness 10. 3 and 4, the same constituent elements as those shown in FIGS. 1 and 2 are denoted by the same reference numerals.

  The wire harness 10 includes a first electric wire 91, a second electric wire 92, a metal pipe 4, an exterior material 1, and a plurality of parallel connection members 5. For example, the wire harness 10 is attached to the lower surface side of a support such as a floor in a vehicle such as an automobile. FIG. 4 also shows a stud bolt 81 and a nut 82 for fixing the parallel connection member 5 to the support.

  The first electric wire 91 and the second electric wire 92 are insulated wires having a linear conductor and an insulating coating covering the periphery of the conductor. For example, the first electric wire 91 is an electric wire for high-voltage AC power that requires an electromagnetic shield, and the second electric wire 92 is an electric wire for low-voltage. The first electric wire 91 and the second electric wire 92 are each one or a plurality of electric wires.

  The metal pipe 4 is a pipe through which the first electric wire 91 passes, and is, for example, an aluminum pipe or a stainless steel pipe. The metal pipe 4 has a tubular straight tube portion 41 along a straight line and a tubular bent tube portion 42 along a curve.

  In the example shown in FIG. 3, the metal pipe 4 has a plurality of straight pipe portions 41 and a plurality of curved pipe portions 42. The metal pipe 4 is obtained, for example, by bending a straight pipe.

  In the present embodiment, the exterior material 1 is a synthetic resin member through which the second electric wire 92 penetrates, and is an example of an exterior resin material. The exterior material 1 is formed in a tubular shape arranged in parallel with the metal pipe 4.

  The exterior material 1 (exterior resin material) includes a corrugated tube 2 and a straight tubular hard pipe 3. The hard pipe 3 in the wire harness 10 is a straight tubular synthetic resin pipe (hard resin pipe).

  Each of the parallel connection members 5 is a member that connects the metal pipe 4 and the exterior material 1 at a plurality of locations, and holds the metal pipe 4 and the exterior material 1 in a state of being arranged in parallel. The parallel connection member 5 is a molded member of synthetic resin such as polyamide (PA), polypropylene (PP), polybutylene terephthalate (PBT), or ABS resin. It is also conceivable that the parallel connection member 5 is a metal member.

  In the example shown in FIG. 4, the parallel connection member 5 connects the metal pipe 4 and the exterior material 1 that are arranged in parallel to each other and the first piece side portion 51 and the second piece side portion 52 that sandwich the exterior material 1 so as to be relatively rotatable. And a hinge portion 53.

  A part of each of the first piece side part 51 and the second piece side part 52 constitutes a lock part 56 that maintains the combined state of the first piece side part 51 and the second piece side part 52 by engaging with each other. Yes. The first piece side portion 51 and the second piece side portion 52 are combined in a state where the metal pipe 4 and the exterior material 1 are sandwiched.

  When the first piece side 51 and the second piece side 52 are combined, the metal pipe 4 and the first piece side 51 and the second piece side 52 of the exterior material 1 respectively penetrate the metal pipe through hole 54 and the exterior. A material through hole 55 is formed.

  The metal pipe 4 and the exterior material 1 are sandwiched between the metal pipe 4 and the exterior material 1 while being passed through the metal pipe through-hole 54 and the exterior material through-hole 55, respectively. Are maintained in parallel.

  Further, the first piece side 51 and the second piece side 52 are formed with bolt through holes 57 through which the bolts 8 for fixing the parallel connection member 5 to a support such as a vehicle floor are passed. It is also conceivable that the parallel connection member 5 is fixed to the support body with a fastener of an engagement mechanism.

  In the wire harness 10, the hard pipe 3 (hard resin pipe) of the exterior material 1 is supported by the parallel connection member 5 at a position aligned in parallel with the straight pipe portion 41 of the metal pipe 4. On the other hand, the corrugated tube 2 of the exterior material 1 is supported by the parallel connection member 5 at a position aligned in parallel with the portion including the bent pipe portion 42 in the metal pipe 4.

<Effect>
The exterior material 1 has a structure in which a corrugated tube 2 and a hard pipe 3 are connected. Such an exterior material 1 can be applied to various wiring paths including a curved path by selecting a combination of the corrugated tube 2 and the hard pipe 3.

  As shown in FIG. 3, when the hard pipe 3 is a straight tube, the exterior material 1 can be arranged in parallel with the metal pipe 4 having the straight pipe portion 41 and the curved pipe portion 42. It is also conceivable that a plurality of types of hard pipes 3 having a predetermined shape that are frequently employed are prepared in advance. In this case, the exterior material 1 can be applied to a wiring route including a route that can be handled by the hard pipe 3 having a predetermined shape and a route that is not.

  Moreover, the hard pipe 3 can maintain a fixed shape by itself. Therefore, the exterior material 1 having a structure in which the corrugated tube 2 and the hard pipe 3 are connected to each other can be maintained in shape only by being fixed to the metal pipe 4 at as few places as possible.

  For example, as shown in FIG. 3, the rigid pipe 3 maintains a state along a predetermined path if it is fixed at two locations by a fixing member such as the parallel connection member 5. As a result, it is possible to reduce the man-hours and cost for mounting the exterior material 1.

  Furthermore, in the exterior material 1, by fitting the annular connecting convex portion 31 formed on the outer peripheral surface of the connecting portion 30 of the hard pipe 3 and the annular concave portion 21 on the inner peripheral surface of the end portion 20 of the corrugated tube 2. The corrugated tube 2 and the hard pipe 3 are connected. In this case, the connecting convex portion 31 of the hard pipe 3 that supports the inner surface of the corrugated tube 2 prevents the corrugated tube 2 from being deformed inward of the annular concave portion 21.

  By adopting the connection structure as described above, a gap serving as an intrusion path for scattered matter is less likely to occur between the connection portion 30 of the hard pipe 3 and the end portion 20 of the corrugated tube 2 due to deformation of the corrugated tube 2, It is possible to provide the exterior material 1 having high airtightness.

  Further, the outer diameter of the opening end 301 of the connecting portion 30 in the hard pipe 3 is formed smaller than the inner diameter of the annular convex portion 22 of the corrugated tube 2. Further, at least the first connecting convex portion 311 near the opening end 301 among the plurality of connecting convex portions 31 is a convex portion having a lower height than the depth of the annular concave portion 21 of the corrugated tube 2 (low-back connecting convex portion). ). In this case, the connecting portion 30 of the hard pipe 3 can be easily inserted inside the end portion 20 of the corrugated tube 2.

  The tall third connecting convex portion 313 is deeply fitted into the annular concave portion 21 of the corrugated tube 2. Therefore, the airtightness of the part where the corrugated tube 2 and the hard pipe 3 are connected is further increased.

  Further, the third connecting convex portion 313 which is taller than the others is formed at a position farthest from the opening end 301 of the hard pipe 3. Therefore, when the corrugated tube 2 and the hard pipe 3 are connected, the tall third connecting convex portion 313 is finally inserted inside the vicinity of the opening end 201 in the corrugated tube 2. As a result, the tall third connecting convex portion 313 is unlikely to become a catching portion that hinders the insertion of the connecting portion 30 of the hard pipe 3 into the corrugated tube 2.

  Moreover, the wire harness 10 is a typical example of the wire harness attached to the lower surface side of a support body like the floor of a vehicle, for example. Such a wire harness 10 is a suitable example as an application object of the exterior material 1 for wire harnesses that has high path adaptability and can reduce the number of fixing points.

Second Embodiment
Next, an exterior material 1A for a wire harness according to the second embodiment will be described with reference to FIG. FIG. 5 is a cross-sectional view of the exterior material 1A. In FIG. 5, the exterior material 1 </ b> A and the electric wire 9 to be protected by the exterior material 1 </ b> A are shown.

  1 A of exterior materials differ in the point provided with hard pipe 3A from which the shape of the convex part for a connection differs compared with the exterior material 1 which FIGS. 1-3 shows. In FIG. 5, the same components as those shown in FIGS. 1 to 3 are given the same reference numerals. Hereinafter, the difference of the exterior material 1A from the exterior material 1 will be described.

  The exterior material 1 </ b> A includes a corrugated tube 2 and a hard pipe 3 </ b> A that are respectively connected at the ends. A plurality of connecting protrusions 31 are formed on the connecting portion 30 of the hard pipe 3A. In the example shown in FIG. 5, a first connecting convex portion 311 </ b> A, a second connecting convex portion 312 </ b> A, and a third connecting convex portion 313 </ b> A are formed in order from the opening end 301 side of the connecting portion 30.

  In the exterior material 1A, the first connecting convex portion 311A, the second connecting convex portion 312A, and the third connecting convex portion 313A are all convex portions that are shorter than the depth of the annular concave portion 21 of the corrugated tube 2 (low Back connection convex part).

  Each of the first connecting convex portion 311A, the second connecting convex portion 312A, and the third connecting convex portion 313A pushes the annular recess 21 at the end of the corrugated tube 2 in the width direction of the annular recess 21. In this state, it is fitted into the annular recess 21. The width direction of the annular recess 21 is the axial direction of the corrugated tube 2.

  That is, in the exterior material 1A, the width of each of the first connecting convex portion 311A, the second connecting convex portion 312A, and the third connecting convex portion 313A is the annular concave portion 21 on the inner peripheral surface of the corrugated tube 2 in the natural state. Greater than the width of In this case, the connecting convex portions 311A, 312A, 313A and the annular concave portion 21 on the inner peripheral surface of the corrugated tube 2 are brought into close contact with each other by the elastic force of the corrugated tube 2. Therefore, the airtightness of the portion where the corrugated tube 2 and the hard pipe 3A are connected is further increased.

  In the example shown in FIG. 5, the second side surface 31 y of each of the coupling convex portions 31 is the first side surface 21 x of the annular concave portion 21 in a state where each of the coupling convex portions 31 is fitted in each of the annular concave portions 21 of the corrugated tube 2. It is formed at an angle along. Thereby, the airtightness of the connection part 30 and the internal peripheral surface of the corrugated tube 2 increases.

  Further, in the example shown in FIG. 5, the first side surface 31x of each of the second connecting convex portion 312A and the third connecting convex portion 313A is also fitted in each of the annular concave portions 21 of the corrugated tube 2. Are formed at an angle along the second side surface 21 y of the annular recess 21.

<Application example>
The first connecting convex portion 311A and the second connecting convex portion 312A in the hard pipe 3A of the exterior material 1A are applied to the first connecting convex portion 311 and the second connecting convex portion 312 in the hard pipe 3 of the exterior material 1. It can also be considered.

  It is also conceivable that the exterior material 1 </ b> A is applied as the exterior material 1 of the wire harness 10.

  In addition, the exterior material for wire harnesses and wire harnesses according to the present invention can be freely combined with each of the embodiments and application examples shown above within the scope of the invention described in each claim, or each of the embodiments and It is also possible to configure the application example by appropriately modifying or omitting a part thereof.

1,1A exterior materials (exterior materials for wire harnesses, exterior resin materials)
DESCRIPTION OF SYMBOLS 10 Wire harness 2 Corrugated tube 20 End part of corrugated tube 201 Open end of corrugated tube 21 Annular recessed part of inner peripheral surface 21x First side surface of annular recessed part 21y Second side surface of annular recessed part 22 Annular convex part on inner peripheral surface 3,3A Hard pipe (hard resin pipe)
DESCRIPTION OF SYMBOLS 30 Connection part 301 Open end of connection part 31 Connection convex part 31x 1st side surface of connection convex part 31y 2nd side surface of connection convex part 311,311A 1st connection convex part (low-profile connection convex part)
312, 312A Second connection convex part (low profile convex part)
313 Third connecting convex portion 313A Third connecting convex portion (low profile connecting convex portion)
4 Metal Pipe 41 Straight Pipe Part 42 Curved Pipe Part 5 Parallel Connection Member 51 First One Side Part 52 Second One Side Part 53 Hinge Part 54 Metal Pipe Through Hole 55 Exterior Material Through Hole 56 Locking Part 57 Bolt Through Hole 8 Bolt 9 Electric wire 91 First electric wire 92 Second electric wire

Claims (5)

A corrugated tube having flexibility by having a bellows structure;
It is formed in a tube that is harder than the corrugated tube, and includes a hard pipe formed at the end of a connection portion that is connected to the corrugated tube in a state of being inserted inside the end of the corrugated tube,
An outer covering material for a wire harness, in which an annular connecting convex portion fitted in an annular concave portion on an inner peripheral surface of an end portion of the corrugated tube is formed on an outer peripheral surface of the connecting portion of the hard pipe. In the hard pipe,
The outer diameter of the open end of the connecting portion is formed smaller than the inner diameter of the annular convex portion on the inner peripheral surface of the corrugated tube,
A plurality of the connecting convex portions are formed in the connecting portion,
The remaining connecting convex portions excluding the connecting convex portion formed at least farthest from the opening end of the connecting portion are shorter than the depth of the annular concave portion on the inner peripheral surface of the corrugated tube. The exterior material for a wire harness according to claim 1, which is a low-profile connecting convex portion.   The low profile connecting convex part in the connecting part of the hard pipe is fitted into the concave part in a state where an annular concave part on the inner peripheral surface of the end part of the corrugated tube is expanded in the width direction of the concave part. The exterior material for a wire harness according to claim 2.   The said convex part for a connection formed in the position farthest from the said opening end in the said connection part of the said rigid pipe is formed taller than the said other convex part for a connection. The exterior material for wire harnesses described in 1. The first electric wire,
A metal pipe through which the first electric wire penetrates, having a tubular straight pipe part along a straight line and a tubular curved pipe part along a curve;
A second electric wire,
It is a synthetic resin member formed in a tubular shape arranged in parallel with the metal pipe, and an exterior resin material through which the second electric wire has passed,
A plurality of parallel connection members that connect the metal pipe and the exterior resin material at a plurality of locations, and hold the metal pipe and the exterior resin material in a state of being arranged in parallel;
The exterior resin material is
A corrugated tube that has flexibility by having a bellows structure and is arranged in parallel with a portion including the bent pipe portion of the metal pipe;
A rigid resin pipe formed in a straight tube that is harder than the corrugated tube, and a connecting portion that is connected to an end portion of the corrugated tube is formed at the end portion, and is arranged in parallel to the straight tube portion of the metal pipe; With
A wire harness in which an annular connecting convex portion fitted into an annular concave portion in an inner peripheral surface of an end portion of the corrugated tube is formed on an outer peripheral surface of the connecting portion of the hard resin pipe.

Images