JP2000233696A - Grommet for wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a grommet to be released from a vehicle body together with a wire harness when the wire harness is applied with a tensile force and is pulled out from a vehicle in the disassembling work of the vehicle. SOLUTION: A grommet main body has a slender connection portion 26 extending to the car room side through an opening from the gradually shrunk side wall 18a of a bowl-shaped vehicle body fitting portion 18, and the tip portion 26a of the slender connection portion 26 is bound to a wire harness 14 by a tape. When tensile force F is applied from the car room side and the wire harness 14 starts to be displaced to the car room side, the connection portion 26 is also displaced to the car room side as the wire harness 14 is displaced, and the side wall 18a of the grommet main body is locally pulled to the car room side and deformed interlockingly with it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a method for dismantling a vehicle,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grommet for a wire harness that can improve the detachability of a grommet for fixing the wire harness to the vehicle body when the wire harness routed to the vehicle is removed from the vehicle body.

[0002]

2. Description of the Related Art Amid increasing awareness of environmental issues, interest in the effective use of resources is increasing. Such problems are no exception for discarded vehicles. In particular, the amount of wire harnesses used in recent electronically controlled vehicles is enormous, and at present it cannot be ignored.

Under such circumstances, the wire harness is currently removed from the vehicle for recycling, but there is a problem that the work is not easy. One of the problems is that the grommet for fixing the wire harness to the through hole of the vehicle body does not easily come off the vehicle body.

In connection with this problem, a conventional grommet will be described with reference to FIGS. The grommet 1 includes a bowl-shaped grommet main body 2 and a cylindrical fixing member 6 for fixing the grommet main body 2 to a wire harness 4. The grommet main body 2 has a body B is fitted to the opening edge of the through hole 8 and is fixed to the vehicle body B.

When the vehicle is disassembled, a wire rope or the like pulled by a power source is used to apply a pulling force to a main portion of the wire harness 4 to pull the wire harness 4 out of the vehicle. .
However, even if such a pulling force is applied to the main part of the wire harness 4, there is a problem that the grommet body 2 is hardly disengaged from the through hole 8 of the vehicle body B as a result of the entire grommet body 2 being pulled.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to disengage from a vehicle body in conjunction with the pulling of a wire harness from a vehicle by applying a pulling force to the wire harness in a vehicle dismantling operation. A grommet for a wire harness is provided.

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided a mounting flange provided with a circumferential groove which fits into an opening edge of a through hole of a vehicle body, and the mounting flange is gradually removed from the mounting flange. A grommet body having a side wall that is reduced in diameter, and a cylindrical wire harness attachment portion extending from the bottom of the side wall, the grommet body extending from the side wall and protruding outside from an opening in the grommet body. This is achieved by providing a grommet for a wire harness, characterized in that the tip portion has an elongated connecting portion fixed to the wire harness. The connecting portion may be formed integrally with the grommet body or may be formed as a separate member.

[0008]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 3 is a cross-sectional view of the main body of the grommet according to the present invention, and FIG. 4 is a cross-sectional view showing the grommet according to the present invention in a state where the grommet is attached to a wire harness. The grommet 10 according to the present invention comprises:
As in the prior art, it is composed of a main body 12 and a fixing portion 16 around which a plastic tape or the like for fixing the main body 12 to the wire harness 14 is wound (FIG. 4).

The grommet main body 12 has a bowl-shaped vehicle body mounting portion 18 that opens toward the cabin side, as in the prior art.
And a cylindrical wire harness mounting portion 20 extending from a bottom portion of the vehicle body mounting portion 18 toward the engine room.
A relatively thick mounting flange 22 is formed at the opening edge of the vehicle body mounting portion 18, and a circumferential groove 24 that opens radially outward is formed in the mounting flange 22. Is provided.

The grommet main body 12 also extends from the inner wall surface of the bowl-shaped body mounting portion 18 to the outside through its opening.
That is, it has an elongated connecting portion 26 extending toward the passenger compartment, and the base end of the elongated connecting portion 26 is formed by a gradually reducing side wall 18a of the bowl-shaped vehicle body mounting portion 18, that is, the vehicle body mounting flange 22 and the wire. It is connected to a region sandwiched between the harness mounting portion 20 (see FIG. 3). This connecting part 26
The position of the base end is not particularly limited,
It is considered that the vicinity of the mounting flange 22 is preferable for improving the detachability of the grommet body 12 from the vehicle body described later.

Grommet 1 for wire harness 14
The mounting of 0 is performed in the following procedure. First, the wire harness 14 is inserted into the cylindrical wire harness mounting portion 20 of the grommet main body 12 and wound around the wire harness mounting portion 20 and the wire harness 14 with a vinyl tape or the like, and the grommet main body 12 is positioned at a predetermined position. Position. Next, after attaching the distal end portion 26a of the connecting member 26 of the grommet body 12 to the peripheral surface of the wire harness 14, the distal end portion 26a is bound to the wire harness 14 using a tape T, and this is connected to the wire harness 1.
4 and integrated.

Next, the grommet main body 12 is fixed to the vehicle body B by fitting the circumferential groove 24 of the mounting flange 22 of the grommet main body 12 into the periphery of the through hole 28 of the vehicle body B.

At the time of dismantling the vehicle, for example, the wire harness 14 routed to the vehicle is removed from the passenger compartment side by using a tow rope to remove it.
The pulling force acting on the wire harness 14 is shown in FIGS.
Is indicated by reference numeral F.

FIGS. 5 and 6 show the wiring harness 14.
Fig. 3 shows, in chronological order, the operation of the grommet 10 according to the present invention when a pulling force F is applied to remove the grommet. That is, FIG. 5 shows an initial stage in which the pulling force F is started to be applied, and FIG. 6 shows a state after that. As can be understood from these drawings, the pulling force F
When the wire harness 14 starts to be displaced toward the passenger compartment due to the addition of the wire harness 14, the connecting portion 26 is displaced toward the passenger compartment along with the displacement of the wire harness 14, and the side wall of the grommet body 12 is interlocked with this. 18a is locally pulled toward the passenger compartment and deformed (FIG. 5). Due to this local deformation, the mounting flange 22 of the grommet main body 12 is partially deformed, and a part of the circumferential groove 24 of the flange 22 starts to separate from the vehicle body B (FIG. 6). Is omitted, but the grommet body 12 is entirely separated from the vehicle body B.

As described above, the grommet 1 according to the first embodiment of the present invention
However, the position of the base end of the connecting portion 26 of the grommet main body 12 was determined by examining the location where the deformation of the grommet main body 12 due to the displacement of the wire harness 14, that is, the deformation of the mounting flange 22 is most effectively performed. It is better to determine by The width, thickness, and the like of the connecting portion 26 may be designed so as not to be broken when a tensile force F is applied to the wire harness 14, and the cross-sectional shape thereof is, for example, as shown in FIG. 7) may be rectangular, or may be circular as shown in FIG. 7B, and is not particularly limited.

FIGS. 8 and subsequent figures show a grommet of a second embodiment according to the present invention. This embodiment shows an example in which the connecting portion 26 described in the first embodiment is formed separately from the grommet main body 12. In the description of the second embodiment, the same components as those described in the first embodiment (FIGS. 3 to 7) are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

The grommet body 32 of the grommet 30 of the second embodiment has a through hole 34 in the side wall 18a, and an elongated connecting member 36 is mounted using the through hole 34. As shown in FIG. 11, the elongated connecting member 36 includes an enlarged head portion 38 having an enlarged diameter and an elongated connecting portion 40 extending from the center of the enlarged head portion 38. , And has a slightly bent distal end portion 40a.

The grommet 30 of the second embodiment is used by inserting a connecting member 36 into a through hole 34 of a main body 32, and using a tip portion 40a extending outward from an opening of the bowl-shaped main body 32 with a wire. A tape T is attached to the wire harness 14 along the outer peripheral surface of the harness 14 to be integrated with the wire harness 14.

The shape of the through hole 34 of the grommet main body 30 may be selected to be suitable for the cross-sectional shape of the connecting portion 40 of the connecting member 36. Further, the size of the enlarged head portion 38 of the connecting member 36 and the width and thickness of the connecting portion 40 may be designed so that the wire harness 14 does not break when a tensile force F is applied thereto. , Connecting part 40
May be rectangular or circular as shown in FIG. 7 (a) or (b) described above.
There is no particular limitation.

[0020]

According to the present invention, since the above structure is employed, the detachability of the grommet is improved when the vehicle is disassembled, so that the sorting and collecting can be performed with good workability.

[Brief description of the drawings]

FIG. 1 is a sectional view of a conventional grommet body.

FIG. 2 is a cross-sectional view showing a conventional grommet mounted on a wire harness.

FIG. 3 is a cross-sectional view of a main body of the grommet according to the first embodiment.

FIG. 4 is a sectional view showing the grommet of the first embodiment in a state where the grommet is mounted on a wire harness.

FIG. 5 is an operation explanatory view of the grommet of the first embodiment according to the present invention, showing a deformed state of the grommet in an initial stage when a pulling force is applied to the wire harness.

FIG. 6 is an explanatory view of the operation of the grommet of the first embodiment according to the present invention, showing a state where the grommet has begun to separate from the through hole of the vehicle body when a pulling force is applied to the wire harness.

FIG. 7 illustrates a cross-sectional shape of an elongated connecting portion which is a component of the main body of the grommet according to the first embodiment;
(A) illustrates a rectangular cross section, and (B) illustrates a circular cross section.

FIG. 8 is a sectional view of a main body of the grommet according to the second embodiment.

FIG. 9 is a view of the grommet of FIG. 8 as viewed from the IX direction.

FIG. 10 is a sectional view showing the grommet of the second embodiment in a state where the grommet is mounted on a wire harness.

FIG. 11 is a side view of a connecting member which is a component of the second embodiment.

[Explanation of symbols]

 10, 30 Grommet 12, 32 Grommet body 14 Wire harness 18a Side wall 20 Wire harness mounting portion 22 Mounting flange 24 Circumferential groove formed in mounting flange 34 Side wall through hole 36 Connecting member 38 Enlarged head section 40 Slender connecting section

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masatomo Motokawa 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi F-term in Harness Research Institute, Inc. (reference) 5G333 AA09 AA13 AB16 AB27 AB28 CB18 EA02

Claims (3)

[Claims] 1. A mounting flange having a circumferential groove fitted into an opening edge of a through hole of a vehicle body, a side wall gradually reduced in diameter from the mounting flange, and a cylindrical wire extending from a bottom of the side wall. A grommet body having a harness mounting portion, the grommet body extending from the side wall, protruding outside through an opening in the grommet body, and having an elongated connecting portion having a distal end portion fixed to the wire harness. A grommet for a wire harness, comprising: 2. The grommet according to claim 1, wherein the elongated connecting portion is formed integrally with the grommet body. 3. The elongated connecting portion is constituted by a connecting member formed separately from the grommet body, the connecting member including an enlarged head portion and an elongated connected portion extending from the enlarged head portion. 2. The wire harness according to claim 1, further comprising: a through hole that receives the connection member in a side wall of the grommet body. 3.