JP5729166B2 - Pipe harness body mounting structure - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a vehicle body mounting structure for a pipe harness, and more particularly, to mount a pipe harness in which a wire wired in a vehicle is inserted into a metal pipe to a vehicle body panel in a space-saving manner.

Conventionally, a plurality of electric wires are connected between a battery and an inverter of a hybrid vehicle or an electric vehicle, or between an inverter and a motor, and the electric wire is inserted into a shielding metal pipe in a straight region such as under the floor. A harness is routed (see JP 2006-312409 A).
As shown in FIG. 4, the pipe harness 100 is attached to a vehicle body panel 110 that partitions the exterior X and the interior Y, and a plurality of electric wires 101 inserted through the metal pipe 102 are inserted into through holes 111 provided in the vehicle body panel 110. It is penetrated and wired to the passenger compartment Y. A metal bracket 103 to which a rubber seal material 106 is fixed is attached in the vicinity of the front end of the metal pipe 102 in order to ensure waterproofness and dustproofness to the electric wire 101 inserted through the through hole 111, to fix the metal pipe 102, and to connect to the ground. The bracket 103 is fixed to the vehicle body panel 110.

  Specifically, the metal bracket 103 includes a small-diameter cylindrical portion 104 that is caulked and fixed to the outer peripheral surface of the metal pipe 102, and a large-diameter cylindrical portion that is continuous to the small-diameter cylindrical portion 104 and has a rubber seal material 106 fixed to the inner peripheral surface. 105 and a fixing portion 107 protruding in the outer diameter direction from the front end of the enlarged diameter cylindrical portion 105. The fixing portion 107 has a bolt hole 108 for fastening a bolt, and the diameter expansion An annular seal lip portion 106 a is projected from the front end surface of the large-diameter side of the rubber seal material 106 fitted and fixed to the tube portion 105. The small diameter cylindrical portion 104 of the bracket 103 is caulked and fixed to the outer peripheral surface near the front end of the metal pipe 102 through which the plurality of electric wires 101 are inserted, and the bolt hole 108 of the fixing portion 107 communicating with the bolt hole 112 of the vehicle body panel 110. The bracket 103 and the vehicle body panel 110 are fixed to each other by fastening them through bolts B. By fixing the bracket 103 and the vehicle body panel 110 in this manner, the metal pipe 102 can be fixed to the vehicle body panel 110 and connected to the ground, and the seal lip portion 106a on the front end surface of the rubber seal member 106 has a vehicle body around the through hole 111. The sealability of the through hole 111 that is pressed against the panel 110 and penetrates the electric wire 101 drawn from the front end opening of the metal pipe 102 is ensured.

JP 2006-312409 A

  However, in the face seal structure in which the rubber seal material 106 is pressed against the surface of the vehicle body panel 110 around the through hole 111 to seal the through hole 111, the opening of the through hole 111 is secured in order to ensure a certain sealing property. The area needs to be increased to about 5 times the cross-sectional area of the metal pipe 102 through which the electric wire 101 is inserted. Therefore, there is a problem that a space required for attaching the pipe harness 100 to the vehicle body panel 110 is increased, and a place where the pipe harness 100 can be attached is limited.

  This invention makes it a subject to be able to attach to the vehicle body panel of the pipe harness which penetrated the electric wire wired to a vehicle to the metal pipe in space.

In order to solve the above problems, the present invention is a vehicle body mounting structure for a pipe harness in which an electric wire routed in a vehicle is inserted through a metal pipe for shielding,
Provided with a front retainer made of a resin cylindrical body attached to the front end of the metal pipe on the vehicle body connection side ;
The front retainer includes an inner peripheral wall and an outer peripheral wall formed in a folded shape on the front end side, and an insertion space into which a front end portion of the metal pipe is inserted is formed between the inner peripheral wall and the outer peripheral wall, and At least a pair of elastic locking pieces are formed on the inner peripheral wall at opposing positions, and a locking portion provided on the outer surface of the elastic locking piece is engaged with a locked portion provided at the front end of the metal pipe. The front retainer is fixed to the metal pipe, and the electric wire wired to the passenger compartment side is pulled out from the front end opening of the front retainer, and an annular rubber sealing material is continuously attached to the rear end of the front retainer. A cylindrical portion that is externally fitted and is continuously crimped to the outer periphery of the metal pipe continuously from the rear end of the rubber seal material, and a fixing portion having a bolt hole drilled from the outer periphery of the front end of the cylindrical portion. Install a metal bracket which projects,
The front retainer is passed through a through hole drilled in the vehicle body panel to seal the rubber seal material against the inner peripheral surface of the through hole, and is fastened and fixed to the vehicle body panel with bolts that pass through the bolt holes of the bracket. In addition, there is provided a vehicle body mounting structure for a pipe harness in which the metal pipe is grounded and fixed to a vehicle body panel via a bracket.

  As described above, the front retainer made of a resin cylindrical body is fitted and fixed to the front end of the metal pipe as a structure for attaching the wire harness routed to the vehicle to the body panel of the pipe harness inserted through the metal pipe. . Further, a metal bracket that is continuously fitted to the metal pipe and is fixed to the vehicle body panel and is fastened to the metal pipe by being continuously fitted to the rear end of the front retainer, and the front retainer, The rubber seal material is held between the two. Therefore, the front retainer can be penetrated through the through hole of the vehicle body panel, and the rubber seal material on the rear end side can be pressed against the inner peripheral surface of the through hole to seal the through hole, thereby achieving high sealing performance. The opening area of the through hole can be reduced to the same extent as the cross-sectional area of the metal pipe. Accordingly, the pipe harness can be attached in a space-saving manner, and the attachment location to the vehicle body panel is not easily restricted, so that the routing route can be set more freely.

In addition, since the opening area of the through hole formed in the vehicle body panel can be reduced as described above, the bracket fixing portion for fixing the metal pipe to the vehicle body panel and connecting to the ground can also be reduced in size. Furthermore, the cylindrical front retainer is a relatively inexpensive resin molded product, and the rubber seal material continuously fitted to the rear end of the front retainer is also a small annular rubber material. it can.
In addition, it is preferable that a plurality of annular seal lip portions that are pressed in close contact with the inner peripheral surface of the through hole of the vehicle body panel are provided in parallel on the outer peripheral surface of the rubber seal material.

  In the present invention, the front retainer is pressed against the front end surface of the rubber seal material, and the inner peripheral side of the fixing portion of the bracket is pressed against the rear end surface of the rubber seal material to position the rubber seal material. Is going.

  As described above, the rubber seal material is held between the front retainer and the fixed portion of the bracket and positioned in the front-rear pressing state, thereby preventing the rubber seal material from being displaced in the axial direction and dropping off the rubber seal material. Can be prevented. Therefore, the high sealing performance of the through hole can be maintained.

As described above, the front retainer includes an inner peripheral wall and an outer peripheral wall formed in a folded shape on the front end side, and an insertion space into which the front end portion of the metal pipe is inserted is formed between the inner peripheral wall and the outer peripheral wall. In addition, at least a pair of elastic locking pieces are formed on the inner peripheral wall at opposing positions, and an outer surface of the elastic locking pieces is engaged with a locked portion provided at a front end portion of the metal pipe. part is that provided.

As described above, the front end of the metal pipe is inserted into the insertion space between the inner peripheral wall and the outer peripheral wall of the front retainer that is folded at the front end side, thereby preventing the end edge of the metal pipe from being exposed. Can do. Therefore, it is possible to prevent the electric wire inserted through the metal pipe from coming into contact with and damaging the end edge of the pipe.
Further, by forming at least one pair of elastic locking pieces facing each other on the inner peripheral wall of the front retainer, the front end portion of the metal pipe is bent inwardly with the elastic locking pieces provided with locking portions on the outer surface. Is easily inserted into the insertion space of the front retainer, and the elastic locking piece is elastically restored by the engagement between the locking portion and the locked portion of the metal pipe, so that the front retainer is firmly attached to the metal pipe. And can be fitted and fixed.

  As described above, in the present invention, the front retainer made of a resin cylinder is fitted and fixed to the front end of the metal pipe. Further, a metal bracket that is continuously fitted to the metal pipe and is fixed to the vehicle body panel and is fastened to the metal pipe by being continuously fitted to the rear end of the front retainer, and the front retainer, The rubber seal material is held between the two. Therefore, the front retainer can be penetrated through the through hole of the vehicle body panel, and the rubber seal material on the rear end side can be pressed against the inner peripheral surface of the through hole to seal the through hole, thereby achieving high sealing performance. The opening area of the through hole can be reduced to the same extent as the cross-sectional area of the metal pipe. Accordingly, the pipe harness can be attached in a space-saving manner, and the attachment location to the vehicle body panel is not easily restricted, so that the routing route can be set more freely.

  In addition, since the opening area of the through hole formed in the vehicle body panel can be reduced as described above, the bracket fixing portion for fixing the metal pipe to the vehicle body panel and connecting to the ground can also be reduced in size. Furthermore, the cylindrical front retainer is a relatively inexpensive resin molded product, and the rubber seal material continuously fitted to the rear end of the front retainer is also a small annular rubber material. it can.

It is a perspective view which shows the pipe harness in embodiment of this invention. (A) is the sectional view on the AA line when attaching the pipe harness of FIG. 1 to a vehicle body panel, (B) is the sectional view on the BB line when attaching the pipe harness of FIG. 1 to a vehicle body panel. is there. (A)-(D) are explanatory drawings which show the assembly procedure of a pipe harness. It is a figure which shows a prior art example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show an embodiment of the present invention. In this embodiment, three or two high-voltage electric wires 2 (hereinafter referred to as electric wires 2) between a motor, an inverter, and a battery of an electric vehicle or a hybrid vehicle (not shown) are used, and these electric wires 2 are converged. A pipe harness 1 inserted through a shielding metal pipe 3 made of a metal such as aluminum is routed in the underfloor region. The pipe harness 1 is attached to a vehicle body panel 20 that partitions the vehicle exterior X and vehicle compartment Y, and an electric wire 2 inserted through the metal pipe 3 through the through hole 21 is drawn out to the vehicle compartment Y side.

  Specifically, as shown in FIGS. 1 and 2, the pipe harness 1 has a front retainer 4 made of a resin cylindrical body fitted and fixed to a front end portion 3a on the vehicle body connection side of a metal pipe 3 having a circular cross section. In addition, an annular rubber seal 9 is continuously fitted on the metal pipe 3 continuously to the rear end of the front retainer 4, and a metal bracket 11 is continuously attached to the metal pipe 3 continuously to the rear end of the rubber seal 9. It is attached. The front retainer 4 is passed through the through hole 21 of the vehicle body panel 20, and the rubber seal material 9 on the rear end side is pressed against the inner peripheral surface of the through hole 21 to axially seal the through hole 21. By fitting and fixing the front retainer 4 to the portion 3 a, the electric wire 2 that passes through the metal pipe 3 and is wired to the vehicle interior Y side is pulled out from the front end opening 4 a of the front retainer 4.

  The bracket 11 includes a cylindrical portion 12 that is caulked and fixed to the outer periphery of the metal pipe 3, and a fixing portion 13 that protrudes from the front end of the cylindrical portion 12 in the outer diameter direction. Bolt holes 14 communicating with the bolt holes 22 of the vehicle body panel 20 are formed in the fixing portion 13, and when the pipe harness 1 is attached to the vehicle body panel 20, the fixing portions 13, the vehicle body panel 20, The structure is fastened and fixed. As a result, the metal pipe 3 is fixed to the vehicle body panel 20 via the bracket 11 including the cylindrical portion 12 and the fixing portion 13 and is grounded.

  On the other hand, a resin cylindrical front retainer 4 attached to the front end 3 a of the metal pipe 3 is composed of an inner peripheral wall 5 and an outer peripheral wall 6 formed in a folded shape on the front end side, and between the inner peripheral wall 5 and the outer peripheral wall 6. Is formed with an insertion space 7 into which the front end 3a of the metal pipe 3 is inserted. The inner peripheral wall 5 is provided with a pair of slits 8 having a predetermined width in the circumferential direction and continuing in the axial direction from the rear end side, and a narrow portion sandwiched between the pair of slits 8 is used as an elastic locking piece 5a. Yes. A pair of elastic locking pieces 5a are provided at opposite positions, and a locking portion 5a-1 that engages with a locked hole 3a-1 provided in the front end portion 3a of the metal pipe 3 is provided on the outer surface of the elastic locking piece 5a. While projecting, the outer peripheral wall 6 is divided at both sides of the elastic locking piece 5a so that only the outer surface side of the elastic locking piece 5a is not covered by the outer peripheral wall 6.

  The annular rubber seal 9 disposed between the front retainer 4 and the bracket 11 presses the rear end surface of the outer peripheral wall 6 of the front retainer 4 against the front end surface 9a and the fixing portion 13 of the bracket 11 against the rear end surface 9b. By pressing the inner peripheral side, the rubber seal material 9 fitted on the metal pipe 3 is held without being displaced in the axial direction. The rubber seal material 9 has an inner diameter that can be fitted onto the metal pipe 3 in close contact, and a seal lip portion 10 that is pressed against the inner peripheral surface of the through hole 21 of the vehicle body panel 20 in close contact with the outer surface of the rubber seal material 9. Plurally project in parallel.

Hereinafter, assembly of the pipe harness 1 and attachment of the pipe harness 1 to the vehicle body panel 20 will be described.
As shown in FIG. 3A, the pipe harness 1 includes a metal pipe 3 through which the electric wire 2 is inserted, a metal bracket 11, a rubber seal material 9, and a front retainer 4, and the metal pipe 3 is disposed at a predetermined position of the metal pipe 3. An annular convex portion 3b that holds the rear end position of the cylindrical portion 12 of the bracket 11 attached to the bracket 11 is provided. First, the bracket 11 is arranged so that the rear end of the cylindrical portion 12 is in contact with the convex portion 3b, and the bracket 11 is attached to the metal pipe 3 by caulking and fixing the cylindrical portion 12 to the outer periphery of the metal pipe 3 [FIG. 3 (B)].

Next, the rubber seal material 9 is externally fitted to the metal pipe 3 so that the rear end surface 9b of the rubber seal material 9 is pressed against the inner peripheral side of the fixing portion 13 of the bracket 11 [FIG. 3 (C)].
Subsequently, the front retainer 4 is attached to the front end portion 3a of the metal pipe 3 so that the rear end surface of the outer peripheral wall 6 of the front retainer 4 is pressed against the front end surface 9a of the rubber seal material 9 [FIG. 3 (D)]. At this time, as shown in FIG. 2, the front end 3 a of the metal pipe 3 is inserted into the insertion space 7 between the inner peripheral wall 5 and the outer peripheral wall 6 of the front retainer 4, and the elastic locking piece 5 a of the inner peripheral wall 5 is inserted. The front retainer 4 is fitted and fixed to the front end portion 3 a of the metal pipe 3 by engaging the locking portion 5 a-1 protruding from the outer surface with the locked hole 3 a-1 provided in the front end portion 3 a of the metal pipe 3. Is done. By attaching the front retainer 4 having the above configuration to the front end portion 3a of the metal pipe 3, the end edge of the metal pipe 3 is prevented from being exposed, and the electric wire 2 inserted through the metal pipe 3 may be in contact with the end edge and be damaged. Is prevented.
Finally, the electric wire 2 is inserted into the metal pipe 3 and the electric wire 2 wired on the vehicle compartment Y side is pulled out from the front end opening 4a of the front retainer 4 to complete the assembly of the pipe harness 1 (FIG. 1).

  The pipe harness 1 is attached to the vehicle body panel 20 by passing the front retainer 4 at the front end of the pipe harness 1 through the through hole 21 of the vehicle body panel 20 and the seal lip portion 10 of the rubber seal material 9 continuing to the rear end through the through hole 21. The through hole 21 is pressed against the inner peripheral surface of the bracket 11 and the bolt 13 formed in the fixing portion 13 of the bracket 11 is bolted through the bolt B to fix the fixing portion 13 and the vehicle body panel 20. To the vehicle body panel 20 is completed [FIG. 2 (A)].

  As described above, in this embodiment, the front retainer 4 made of a resin cylindrical body is fitted and fixed to the front end 3 a of the metal pipe 3. An annular rubber seal 9 is continuously fitted to the metal pipe 3 continuously to the rear end of the front retainer 4, and is fixed to the vehicle body panel 20 and is swaged and fixed to the metal pipe 3. A rubber seal material 9 is held between the front retainer 4 and the front retainer 4. Therefore, a shaft seal structure in which the front retainer 4 is passed through the through hole 21 of the vehicle body panel 20 and the rubber seal material 9 on the rear end side is pressed against the inner peripheral surface of the through hole 21 to seal the through hole 21 can be obtained. The opening area of the through hole 21 can be reduced to the same level as the cross-sectional area of the metal pipe 3 while maintaining high sealing performance. Therefore, the pipe harness 1 can be attached in a space-saving manner, and the attachment location to the vehicle body panel 20 is hardly restricted, so that the routing route can be set more freely.

  Moreover, since the opening area of the through hole 21 drilled in the vehicle body panel 20 can be reduced as described above, the fixing portion 13 of the bracket 11 for fixing the metal pipe 3 to the vehicle body panel 20 and connecting to the ground can also be reduced in size. Further, the cylindrical front retainer 4 is a relatively inexpensive resin molded product, and the rubber seal material 9 that is continuously fitted to the rear end of the front retainer 4 is also a small annular rubber material. Can be suppressed.

DESCRIPTION OF SYMBOLS 1 Pipe harness 2 Electric wire 3 Metal pipe 3a Front end part 4 Front retainer 4a Front end opening 9 Rubber seal material 11 Bracket 12 Cylindrical part 13 Fixing part 14 Bolt hole 20 Body panel 21 Through-hole B Bolt

Claims (2)

It is a vehicle body mounting structure of a pipe harness in which an electric wire routed to a vehicle is inserted into a shielding metal pipe,
Provided with a front retainer made of a resin cylindrical body attached to the front end of the metal pipe on the vehicle body connection side ;
The front retainer includes an inner peripheral wall and an outer peripheral wall formed in a folded shape on the front end side, and an insertion space into which a front end portion of the metal pipe is inserted is formed between the inner peripheral wall and the outer peripheral wall, and At least a pair of elastic locking pieces are formed on the inner peripheral wall at opposing positions, and a locking portion provided on the outer surface of the elastic locking piece is engaged with a locked portion provided at the front end of the metal pipe. The front retainer is fixed to the metal pipe, and the electric wire wired to the passenger compartment side is pulled out from the front end opening of the front retainer, and an annular rubber sealing material is continuously attached to the rear end of the front retainer. A cylindrical portion that is externally fitted and is continuously crimped to the outer periphery of the metal pipe continuously from the rear end of the rubber seal material, and a fixing portion having a bolt hole drilled from the outer periphery of the front end of the cylindrical portion. Install a metal bracket which projects,
The front retainer is passed through a through hole drilled in the vehicle body panel to seal the rubber seal material against the inner peripheral surface of the through hole, and is fastened and fixed to the vehicle body panel with bolts that pass through the bolt holes of the bracket. A vehicle body mounting structure for a pipe harness in which the metal pipe is grounded and fixed to a vehicle body panel via a bracket.   2. The rubber seal material is positioned by pressing the front retainer against the front end surface of the rubber seal material and pressing the inner peripheral side of the fixing portion of the bracket against the rear end surface of the rubber seal material. The vehicle body mounting structure of the pipe harness as described in 2.

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