JP2002058142A - Grommet with assist implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely perform mounting in a through-hole for a one-motion grommet. SOLUTION: In this grommet with assist implement, constituted by assembling the assist implement for mounting in a through-hole in the grommet mounted in wire harness to consist of rubber or elastomer mounted in the through-hole of a car body panel, the grommet has a small diameter tube part closely fitting the wire harness, a radially widened tube part connected to one end of this small diameter tube part, and a car body lock recessed part provided in an external peripheral surface of this radially widened tube part, facing sides of this car body lock recessed part are formed with a tall lip part in one side and a short lip part in the other side. The assist implement, however, comprises a flange part peripherally abutting against a back surface side of the tall lip part, a radially spread ring part connected to this flange part, and a small diameter ring part connected to this radially widened ring part to additionally cove the small diameter tube part, this assist implement is mounted in the small diameter tube part from the back surface side of the tall lip part of the grommet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grommet with an assisting tool, and more particularly to a method of pressing a grommet attached to a wire harness into a through hole formed in a vehicle body panel or the like when pushing the grommet into the through hole. Auxiliary aids are attached.

[0002]

2. Description of the Related Art In a wire harness for an automobile, as shown in FIG. 8, a wire harness W / H is passed through a through hole H of a vehicle body panel (for example, a dash panel separating an engine room B and a vehicle compartment A) P. When the wire harness W / H is inserted through the rubber grommet 11 and the tape T is wound around the outer periphery of the grommet 11, the grommet 1 is inserted into the through hole from the engine room B side toward the vehicle compartment A side. Insert and attach.

The grommet 1 is configured to be mounted in the through hole by one-way operation (one motion) from the engine room B to the vehicle compartment A. When the grommet 1 is pushed into the through hole, a short lip portion 1d of the grommet 1 is formed. Is deformed, passes through the through hole, and stops short of the high-tall lip portion 1e. In this manner, the grommet 1 is attached to the through-hole of the vehicle body panel P in one motion by sandwiching the periphery of the through-hole by the high-back lip portion 1e and the low-back lip portion 1d provided on the large-diameter cylindrical portion 1c. I have.

[0004]

However, as shown in FIG. 8, the wire harness W to which the grommet 1 is attached is used.
/ H is routed from the engine room B side through the through hole H and pushed into the cabin A side for routing, if there is an external interference material such as a blower motor near the cabin A side, the blower motor And hinders the insertion path of the wire harness W / H. Since the wire harness W / H, whose course has been obstructed, is pushed and bent so as to avoid the obstacle M, a force for straightening against the bending is applied. This power is
The wire harness W / H is subjected to a force in the direction of inclination because it is applied in the direction of arrow Y1 on the vehicle compartment A side and in the direction of arrow Y2 on the engine room B side.

The force when the wire harness W / H attempts to incline also reaches the grommet 1, so that the grommet 1 is inclined with respect to the vehicle body panel P. When the grommet 1 is to be inserted into the through-hole of the vehicle body panel 1 with the grommet 1 inclined, the grommet 1 has a gap between the tall lip portion 1e and the vehicle body panel P on the side opposite to the arrow Y2 (upward in FIG. 8). Occurs, and extra force is applied between the tall lip portion 1e and the vehicle body panel P on the arrow Y2 side (downward in FIG. 8), so that both lip portions of the grommet 1 penetrate the vehicle body panel P. There is a problem in that it does not follow the hole, which makes the work difficult, and the workability is poor.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and even when there is an obstacle in the insertion path of the wire harness W / H, the grommet can be mounted on the vehicle body panel from one direction. The task is to improve the operability by attaching it by motion.

[0007]

According to the present invention, there is provided a grommet made of rubber or elastomer which is attached to a wire harness and is attached to a through hole of a vehicle body panel. A grommet with an auxiliary tool, wherein the grommet includes a small-diameter cylindrical portion for tightly fitting a wire harness, a large-diameter cylindrical portion connected to one end of the small-diameter cylindrical portion, and an outer periphery of the large-diameter cylindrical portion. A vehicle body locking recess provided on a surface of the vehicle, the opposite side wall of the vehicle body locking recess having one as a tall lip portion and the other as a low lip portion, and the auxiliary tool is provided on a back surface of the tall lip portion. A flange portion, which is circumferentially in contact with the flange portion, a large-diameter ring portion that is continuous with the flange portion, and a small-diameter ring portion that is continuous with the large-diameter ring portion and covers the small-diameter cylindrical portion. Part of It provides a grommet with aid, characterized in that is mounted on the small diameter cylinder portion from the side.

In the grommet with the assisting device having the above-described structure, when the grommet is attached to the through hole of the vehicle body panel and the operator grips and pushes the assisting device, the tall lip portion of the grommet is evened by the flange portion of the assisting device. It can be pushed from behind with great force. In this way, the lip of the grommet is backed up by the auxiliary tool, and the posture of the tall lip and the low lip of the grommet can be adjusted regardless of the force of the wire harness even if the wire harness is inclined by an obstacle or the like. , That is, the posture when there is no obstacle. Therefore, the grommet can be accurately mounted at the proper position regardless of the presence or absence of an obstacle and the force applied to the wire harness.

The above-mentioned auxiliary tool is divided into two parts along the axial direction, is formed of two divided parts, and is provided with a locking means for coupling these divided parts with the grommet put thereon. It is preferable that one of the divided parts is connected via a thin hinge. As described above, when the auxiliary tool is divided into two parts along the axial direction, the auxiliary tool can be attached to the grommet after the grommet is attached to the wire harness.

[0010] It is preferable that a reinforcing rib is provided on the outer peripheral surface of the enlarged-diameter ring portion of the auxiliary tool. The ribs are, for example, streaky ribs provided at intervals in the axial direction. As described above, when the reinforcing rib is provided on the enlarged diameter ring portion, the strength of the enlarged diameter ring portion can be increased, and the slip can be eliminated when the operator grips the enlarged diameter ring portion.

Further, the grommet may include a large-diameter cylindrical portion and a small-diameter cylindrical portion on both sides of the vehicle body locking concave portion, and the open ends of the small-diameter cylindrical portions on both sides may be fixedly wound around the wire harness with a tape. . With the above configuration, it is possible to suppress deformation of the lower lip side of the insertion side sandwiching the vehicle body locking recess, and to stably lock the lip to the periphery of the through hole.

In the above grommet, the large-diameter cylindrical portion on the side of the tall lip portion is formed by an inner cylinder and an outer cylinder having a gap,
A configuration in which a tall lip portion is provided at a junction between the inner cylinder and the outer cylinder may be adopted. As described above, when the portion located on the engine room side is a double cylinder of the inner cylinder and the outer cylinder, an air layer that absorbs abnormal noise on the engine room side can be provided therebetween, and the sound insulation performance of the grommet is reduced. Can be enhanced.

Further, the grommet may be provided with an auxiliary lip portion on the tall lip portion, and the flange may be sandwiched between the tall lip portion and the auxiliary lip portion. When the auxiliary tool is provided and the auxiliary tool is clamped, the auxiliary tool can be attached to the grommet without winding the tape. In addition, even when a force in a direction opposite to the insertion direction is applied to the auxiliary tool, the flange portion of the auxiliary tool is restrained by the auxiliary lip portion, and can be prevented from coming off the grommet.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an auxiliary tool 21 according to a first embodiment of the present invention, and FIGS. 2A and 2B are a perspective view and a sectional view of a one-motion grommet 11 on which the auxiliary tool 21 is mounted.

The grommet 11 has a first small-diameter tube portion 11a for tightly fitting a wire harness, a first enlarged-diameter tube portion 11b connected to one end of the first small-diameter tube portion, and an outer peripheral surface of the first enlarged-diameter tube portion. , A second enlarged diameter portion 11f continuous with the vehicle body engagement concave portion 11c, and a second small diameter cylindrical portion 11g continuous with the second enlarged diameter portion 11f. A tall lip portion 11e is provided on the side of the first enlarged-diameter cylinder portion 11b with the vehicle body locking recessed portion 11c interposed therebetween, and a tall lip portion 11d is provided opposite thereto. The first enlarged-diameter cylinder portion 11b includes an inner cylinder 11b-1 and an outer cylinder 11b.
-2, and the tall lip portion 11e is provided at a position where the inner tube and the outer tube meet. The inner and outer cylinders 11b-1 and 11b-2 are provided with a sealed air layer 11h fixed with a tape T1.

The assisting tool 21 is composed of divided bodies 21A and 21B, both of which are connected to each other by a thin hinge part 21g and integrally formed, and the divided ends are a locking part 21e and a locked part 21f.
It is configured to be locked by. The divided bodies 21A and 2
1B is a large-diameter ring 21c having a flange 21d along the tall lip 11e of the grommet 11, a large-diameter ring 21b continuous with the large-diameter ring 21c, and a small-diameter ring continuous with the large-diameter ring 21b. It comprises a part 21a.

FIG. 3 shows the grommet 10 with an auxiliary tool in which the auxiliary tool 21 is assembled to the grommet 11. The auxiliary tool 21
The locking part 21e of the divided body 21A is locked by being locked to the locked part 21f of the divided body 21B, the auxiliary tool 21 is mounted on the tall lip part 11e side of the grommet 11, and the flange part 21d is raised. The ring portion 21c, 21b, 21a is brought into circumferential contact with the lip portion 11e, and the first enlarged-diameter cylinder portion 11b,
The small diameter cylindrical portion 11a is covered and integrally assembled.

FIG. 4 shows a state in which the grommet with an auxiliary tool 10 is attached to a wire harness W / H and wired to an automobile. The wire harness W / H is passed through the grommet 10 with the assisting tool, and the tip of the small-diameter ring portion 21a of the assisting tool 21 is wound around the wire harness W / H with the tape T2, so that the grommet 11 and the assisting tool 21 are wound around the wire harness W / H. Is fixed.

In this state, the through hole H of the vehicle body panel P
The grommet 11 is pushed from the engine room B to the vehicle room A. When the worker grips and pushes the assisting tool 21 during the pushing operation, the flange 21d of the assisting tool 21 is in circumferential contact with the tall lip portion 11e.
In particular, the tall lip portion 11e can be pushed straight without deformation. The portion of the low lip portion 11d of the grommet 11 is deformed and passes through the through hole H of the vehicle body panel P, and the periphery of the through hole H becomes the low lip portion 1
1d and the tall lip portion 11e.

At this time, when there is an obstacle M such as a blower motor or the like on the vehicle room A side and the wire harness collides with the obstacle M, it receives a force to bend in a direction to avoid the obstacle M, and the engine room B On the side, it is inclined to receive the force in the opposite direction to the compartment A side. However, even when such a force is received, in the grommet 10 with the assisting tool, since the worker grasps the large-diameter ring portion 21b of the assisting tool 21 and pushes it straight, the tall lip portion 11e causes the flange 21d. Is pressed uniformly. By this pushing, both the tall lip portion 11e and the tall lip portion 11d are corrected to the normal posture, so that the grommet 10 with the assisting tool is efficiently attached regardless of the above-mentioned force applied to the wire harness W / H. be able to.

FIGS. 5A and 5B show a second embodiment.
Auxiliary lip 1 on tall lip 11e of grommet 11
1j. By providing the auxiliary lip portion 11j, the flange portion 21d of the auxiliary tool 21 is
1e and the auxiliary lip portion 11j, so that the auxiliary tool 21 does not come off even when the auxiliary tool 21 is pulled in the reverse direction, and the auxiliary tool 21 can more reliably back up the grommet 11. . Since the other configuration is the same as that of the first embodiment, the same reference numerals are given and the description is omitted. In FIG. 5A, the auxiliary tool 21 is fixed to the wire harness by winding a tape, but the auxiliary tool 21 is provided with the auxiliary lip portion 11j so that the grommet 1 can be used.
1, the tape winding may be omitted.

FIGS. 6 and 7 show a third embodiment in which the shape of the auxiliary tool is changed. The auxiliary tool 21 has a reinforcing rib 21h extending in the axial direction on the outer peripheral surface of the enlarged diameter ring portion 21b. Are protruding at intervals. Further, the locking portion 21e and the locked portion 21f are provided in the flange portion 21d. Other configurations are basically the same as those of the auxiliary tool 21 of the first embodiment, and the same reference numerals are given and the description is omitted.

When the reinforcing rib 21h is provided as described above,
The thickness of the assisting tool 21 can be reduced, and a slip can be eliminated when the worker grips the assisting tool 21,
Workability is improved.

[0024]

As is clear from the above description, according to the grommet with the assisting device of the present invention, the lip portion of the grommet is supported from behind by the flange portion of the assisting device with a uniform force, and the assisting device is supported. When the worker grips and presses, the lip portion is pressed against the vehicle body with a strong force. With this pressing force, the posture of the lip portion is independent of the force even if the wire harness is inclined by an obstacle or the like. The posture is corrected to a posture perpendicular to the panel, that is, a posture when there is no obstacle. Therefore, the grommet with an auxiliary tool can be efficiently attached regardless of the presence or absence of an obstacle and the force applied to the wire harness.

Since the auxiliary tool is a divided body, after the grommet is mounted on the wire harness, it can be mounted on the grommet of the auxiliary tool. In addition, in the case where the reinforcing rib is provided on the diameter-enlarged ring portion of the assisting tool, slippage does not occur when the worker grips, and thus the workability can be improved.

Further, the grommet can improve the sound insulation performance by providing an air chamber hermetically sealed therein by forming the enlarged-diameter tube portion on the engine room side into an inner / outer double tube structure.
Furthermore, when the auxiliary lip portion is provided on the lip portion of the grommet, the auxiliary device can be sandwiched, the fixing of the auxiliary device by tape winding can be omitted, and the grommet can be detached from the grommet even when an external force acts on the flange portion. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an assisting device according to a first embodiment of the present invention.

FIGS. 2A and 2B show a grommet according to the first embodiment, wherein FIG. 2A is a perspective view and FIG.

FIG. 3A is a perspective view showing a state where the auxiliary tool is attached to a grommet, and FIG. 3B is a partial cross-sectional view.

FIG. 4 is a cross-sectional view showing a state where the grommet with an auxiliary tool according to the first embodiment is mounted on a vehicle body panel.

FIG. 5A is a cross-sectional view showing a state in which a grommet with an auxiliary tool according to a second embodiment of the present invention is mounted on a vehicle body panel, and FIG. 5B is an enlarged cross-sectional view of a main part of FIG.

FIG. 6 is a perspective view showing an assisting device according to a third embodiment of the present invention.

FIG. 7 is a perspective view showing a grommet with an auxiliary tool according to a third embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a state where a conventional grommet is mounted on a vehicle body panel.

[Explanation of symbols]

 Reference Signs List 10 grommet with auxiliary tool 11 grommet main body 11a small-diameter cylindrical section 11b large-diameter cylindrical section 11c large-diameter cylindrical section 11d low-lip section 11e high-lip section 11f auxiliary lip section 21 auxiliary tool 21a small-diameter ring section 21b large-diameter ring section 21c Large-diameter ring part 21d Flange part 21e Locking part 21f Locked part 21g Thin hinge part 21h Reinforcement rib P Body panel H Through hole M Obstacle T Tape W / H Wire harness

Claims (6)

[Claims] 1. A grommet with an auxiliary tool, comprising: a grommet made of rubber or an elastomer mounted on a wire harness and mounted in a through hole of a vehicle body panel; Comprises a small-diameter tubular portion for tightly fitting the wire harness, a large-diameter tubular portion connected to one end of the small-diameter tubular portion, and a vehicle-body locking concave portion provided on the outer peripheral surface of the large-diameter cylindrical portion. One of the opposite side walls of the concave portion is a tall lip portion and the other is a low lip portion, while the auxiliary tool has a flange portion that is in contact with the back side of the tall lip portion and an expanding portion that is continuous with the flange portion. Diameter ring part,
An auxiliary tool comprising a small-diameter ring portion that is continuous with the large-diameter ring portion and covers the small-diameter cylindrical portion, wherein the auxiliary tool is mounted on the small-diameter cylindrical portion from the back side of the tall lip portion of the grommet. Grommet with 2. The assisting tool according to claim 1, wherein the auxiliary tool is divided into two parts along the axial direction to form two divided bodies, and has a locking means for coupling the divided bodies with the grommet put thereon.
The grommet with an assisting tool described in. 3. The grommet with an auxiliary tool according to claim 1, wherein a reinforcing rib is provided on an outer peripheral surface of a diameter-enlarged ring portion of the auxiliary tool. 4. The grommet includes a large-diameter cylindrical portion and a small-diameter cylindrical portion on both sides of the vehicle body locking concave portion, and the open ends of the small-diameter cylindrical portions on both sides are fixed to a wire harness by tape winding. The grommet with an assisting tool according to any one of claims 1 to 3. 5. The enlarged-diameter tube portion on the side of the tall lip portion is formed of an inner tube and an outer tube having a gap, and a tall lip portion is provided at a junction of the inner tube and the outer tube. The grommet with an auxiliary tool according to any one of claims 1 to 4. 6. The method according to claim 1, wherein an auxiliary lip is provided on the tall lip, and the flange is sandwiched between the tall lip and the auxiliary lip. Grommet with auxiliary tools.