JPH07161251A - Grommet - Google Patents

Abstract

PURPOSE:To provide a grommet whose elastic and rigid parts are placed in a firm connecting condition by improving connection workability of the elastic and rigid parts. CONSTITUTION:A grommet G is constituted of a rubber-made elastic part 7 and a synthetic resin-made rigid part 8. Wire harness 9 is inserted through a small diametric tube part 7a of the elastic part 7, and a large diametric flange part 7b is opposed to a panel hole 6a from one side of a panel 6. The wire harness 9 is inserted through a ring part 8a of the rigid part 8, to be opposed to the panel hole 6a from the other side of the panel 6, and simultaneously with engaging stop parts 8f... of the ring part 8a with an internal peripheral edge of the panel hole 6a from the axial direction, by engaging clip parts 8h... with a clip hole 10a of a rigid plate 10 of the large diametric flange part 7b of the elastic part 7 from the same direction, the elastic part 7 is connected to the rigid part 8. Further by forming a cut part 8c in the rigid part 8, it can be easily fitted to the wire harness 9 from an external diametric direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grommet which is attached to, for example, a panel hole of a panel of an automobile so as to penetrate a wire harness.

[0002]

2. Description of the Related Art Conventionally, the above-mentioned grommet is usually formed of elastic rubber, and is elastically attached to a panel hole of an automobile panel to hold a wire harness and seal the panel hole. ing. However, because it is attached to the panel hole while flexing the grommet greatly,
There is a problem that the workability of mounting is poor and that when a strong pulling force is applied to the wire harness, the wire harness is easily detached from the panel hole.

For this reason, as shown in FIG. 5, a large-diameter flange portion 2b is formed at one end of a small-diameter cylindrical portion 2a for penetrating and supporting the wire harness 1, and the large-diameter flange portion 2b is provided on one side of the panel 4. The rubber elastic portion 2 facing the panel hole 4a from the above, the ring portion 3a fitted into the panel hole 4a from the other side of the panel 4, and protruding from the outer end edge of the ring portion 3a, inside the panel hole 4a. A centering protrusion 3b that engages with the peripheral edge and centers the ring portion 3a in the panel hole 4a, and a groove portion 2c of the large-diameter flange portion 2b of the elastic portion 2 that protrudes from the inner end edge of the ring portion 3a.
Large-diameter flange portion 3 that engages with the elastic portion 2
and a rigid portion 3 made of a synthetic resin having c. (See Japanese Utility Model Laid-Open No. 59-25115)

[0004]

However, in the above grommet, when the rigid portion 3 and the elastic portion 2 are joined, the large-diameter flange portion 3c of the rigid portion 3 is placed inside the large-diameter flange portion 2b of the elastic portion 2. It is necessary to engage with the formed groove portion 2c, and this work must be performed while expanding the vicinity of the groove portion 2c outward, and furthermore, since the wire harness 1 is inside, the work is disturbed. There was a problem that the sex was very bad. Further, the large-diameter flange portion 2b of the rubber elastic portion 2 is made of the synthetic resin rigid portion 3
Since the large-diameter flange portion 3c is pressed from the outside, there is also a problem that the connection between the two is easily disengaged.

The present invention has been made to solve the above problems, and improves the workability of connecting the elastic portion and the rigid portion,
The purpose is to provide a grommet whose binding state is strong.

[0006]

In order to achieve the above object, the present invention has a large-diameter flange portion formed at one end of a small-diameter cylindrical portion for penetrating and supporting a wire harness. , A rigid plate having a clip hole is insert-molded, and an elastic portion that causes the large-diameter flange portion to face the panel hole from one side of the panel, a ring portion that faces the panel hole from the other side of the panel, and a ring portion of the ring portion. An engaging portion that projects from the outer peripheral surface and engages with the inner peripheral edge of the panel hole, and a projecting portion from the tip surface of the ring portion that penetrates the panel hole and that of the rigid plate of the large-diameter flange portion of the elastic portion. A grommet comprising a rigid portion having a clip portion that engages with the clip hole and connects the elastic portion. It is preferable that an axial cut portion is formed in the ring portion of the rigid portion.

A cut portion in the axial direction is formed in the ring portion of the rigid portion, and a retaining portion for detachably retaining on both sides divided by the cut portion is provided, and a wire penetrating the elastic portion is provided. A rigid portion is attached to the harness from the outer peripheral side so that the wire harness can be passed through the ring portion. The elastic portion is made of rubber, and an iron plate or a resin plate is used as a rigid plate for insert molding. The rigid plate is not limited to the iron plate and the resin plate, and may be any plate having rigidity. The rigid portion is made of a resin having rigidity.

[0008]

According to the present invention, the wire harness is passed through the small-diameter tubular portion of the elastic portion, the large-diameter flange portion is made to face the panel hole from one side of the panel, and the wire harness is passed through the ring portion of the rigid portion. , The other side of the panel is opposed to the panel hole, the locking part of the ring part is engaged with the inner peripheral edge of the panel hole from the axial direction, and at the same time, the clip is the clip of the rigid plate of the large diameter flange part of the elastic part from the same direction. The elastic portion and the rigid portion are coupled by engaging with the hole.

As a result, both can be joined with one touch by simply moving the rigid portion in the axial direction, and the workability of joining is improved. Further, since the clip portion of the rigid portion engages with the clip hole of the rigid plate insert-molded into the large-diameter flange portion of the elastic portion, the elastic portion is hard to come off even if the elastic portion bends, and is firmly coupled. Further, since the rigid portion can be fitted to the wire harness from the outer diameter direction by the cut portion of the rigid portion, the fitting workability is also improved.

[0010]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. As shown in FIG. 1, a panel hole 6a for attaching a grommet is formed in a panel 6 that partitions an engine room and a vehicle compartment of an automobile, for example. Grommet G
Is composed of an elastic portion 7 made of rubber and a rigid portion 8 made of synthetic resin.

The elastic portion 7 is composed of a small-diameter cylindrical portion 7a for penetrating and supporting the wire harness 9 and a large-diameter flange portion 7b formed at the inner end of the small-diameter cylindrical portion 7a. The part 7b is made to face the panel hole 6a from one side (right side in the figure) of the panel 6. Large diameter flange 7b
The panel facing surface 7c is provided with a lip portion 7d that elastically contacts and seals the peripheral surface of the panel hole 6a.

2 and 3 in the flange portion 7b.
As shown in FIG. 3, a disc-shaped rigid plate 10 made of an iron plate or a hard synthetic resin plate is insert-molded to form the rigid plate 10.
, Clip holes 10a, ..., 10a at four equal positions on the circumference.
Through holes 7e are respectively formed in the flange portions 7b facing the clip holes 10a.

On the other hand, the rigid portion 8 has a ring portion 8a facing the panel hole 6a from the other side (left side in the figure) of the panel 6 and a large-diameter flange portion 8b formed at the inner end portion of the ring portion 8a. The large-diameter flange portion 8b is formed to have a slightly smaller diameter than the panel hole 6a. The ring portion 8a and the flange portion 8b are formed with an axial cutting portion 8c at one location, and by expanding the cutting portion 8c,
The wire harness 9 can be fitted from the outer diameter direction. After the fitting, the cutting portion 8c is integrally locked by the engagement of the lock protrusion 8d and the lock hole 8e.

Locking which is curved in a U shape and protrudes outward from the outer peripheral surface of the ring portion 8a from the bisected position on the circumference of the outer end portion of the ring portion 8a (the position may be equal to or greater than the bisected position). Parts 8f, 8f
Is provided at the tip of each locking portion 8f so as to engage with the inner peripheral edge of the panel hole 6a so that the ring portion 8a is attached to the panel hole 6a.
A recessed step portion 8g for centering is formed.

In addition, the inner end of the ring portion 8a is divided into four equal positions on the circumference of the ring portion 8a through the panel hole 6a and the through hole 7c of the large-diameter flange portion 7b of the elastic portion 7 to the rigid plate. Arrow-shaped clip portions 8h, ..., 8h that are engaged with the clip holes 10a of 10 are formed.

In the two-object grommet having the above structure, in order to connect the elastic portion 7 and the rigid portion 8 to each other, the wire harness 9 is passed through the small-diameter cylindrical portion 7a of the elastic portion 7 and the large-diameter flange portion 7b. From the right side of the panel 6 to face the panel hole 6a. Then, after widening the cut portion 8c of the rigid portion 8 and fitting it into the wire harness 9 from the outer diameter direction,
The lock protrusion 8d and the lock hole 8e are engaged with each other to be locked integrally.

Thereafter, the large-diameter flange portion 8b of the rigid portion 8 is formed.
While engaging the locking portion 8f with the inner peripheral edge of the panel hole 6a while fitting the clip portion 8f into the panel hole 6a of the panel 6 from the left side, the clip portion 8h of the large diameter flange portion 7b of the elastic portion 7 from the same direction at the same time. The clip hole 10a of the rigid plate 10 is engaged with the through hole 7e. With this, the panel 6 is sandwiched,
The elastic part 7 and the rigid part 8 are joined.

As described above, since the rigid portion 8 can be joined to the elastic portion 7 with one touch only by moving the rigid portion 8 to the left (axial direction), the joining workability is greatly improved. Further, since the clip portion 8h of the rigid portion 8 is engaged with the clip hole 10a of the rigid plate 10 which is insert-molded into the large-diameter flange portion 7b of the elastic portion 7, even if the elastic portion 7 bends, the clip portion 8h and the clip hole 10a. It is difficult to disengage with and it is firmly coupled.

In the above embodiment, four clip holes 10a are formed in the rigid plate 10. However, as shown in FIGS. 4 (A) to (C), two, three, six, etc. Any number of clip holes 10a may be formed. In this case, the number of clip portions 8h is changed according to the number of clip holes 10a. Further, although the rigid plate 10 has a disc shape, as shown in FIG.
As shown in (D), a split piece 10b having a clip hole 10a may be formed, and the split piece 10b may be insert-molded on the large-diameter flange portion 7b at equal intervals on the circumference. Further, in the above embodiment, the clip portion 8h of the rigid portion 8 is formed in the shape of an arrowhead, but the clip portion 8h of FIG.
You may form in spherical shape like (F).

[0020]

As is apparent from the above description, in the grommet of the present invention, the wire harness is passed through the small-diameter tubular portion of the elastic portion, and the wire harness is passed through the ring portion of the rigid portion. The elastic portion and the rigid portion are coupled by engaging the stopper portion with the inner peripheral edge of the panel hole and at the same time engaging the clip portion with the clip hole of the rigid plate of the large-diameter flange portion of the elastic portion from the same direction. Therefore, by simply moving the rigid portion in the axial direction, the two can be joined with one touch, and the joining workability is greatly improved. Further, since the clip portion projection of the rigid portion engages with the clip hole of the rigid plate insert-molded into the large-diameter flange portion of the elastic portion, even if the elastic portion bends, it will not come off easily and will be firmly coupled. Further, by forming the cut portion in the rigid portion, the rigid portion can be easily fitted to the wire harness from the outer diameter direction, and the fitting workability is also improved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a grommet of the present invention.

FIG. 2 is an enlarged cross-sectional view of a locking portion and a clip portion when the grommet of FIG. 1 is coupled.

FIG. 3 is an enlarged cross-sectional view of a portion other than a locking portion and a clip portion when the grommet of FIG. 1 is coupled.

4A to 4D are perspective views of a modified example of a rigid plate,
(E) And (F) is sectional drawing of the modification of a clip part.

FIG. 5 is a sectional view of a conventional grommet.

[Explanation of symbols]

 G Grommet 6 Panel 6a Panel hole 7 Elastic part 7a Small diameter cylinder part 7b Large diameter flange part 8 Rigid part 8a Ring part 8c Cutting part 8f Locking part 8h Clip part 9 Wire harness 10 Rigid plate 10a Clip hole

Claims (3)

[Claims] 1. A large-diameter flange portion is formed at one end of a small-diameter cylindrical portion that penetrates and supports a wire harness, and a rigid plate having a clip hole is insert-molded in the large-diameter flange portion to form the large-diameter flange portion. An elastic portion that causes the flange portion to face the panel hole from one side of the panel, and a ring portion that faces the panel hole from the other side of the panel,
A locking portion that projects from the outer peripheral surface of the ring portion and locks to the inner peripheral edge of the panel hole, and a rigidity of the large-diameter flange portion of the elastic portion that projects from the tip surface of the ring portion and penetrates the panel hole. A grommet comprising a rigid portion having a clip portion that engages with the clip hole of the plate. 2. The ring portion of the rigid portion is formed with an axially cut portion, and is provided with locking portions that are detachably locked on both sides divided by the cut portion. Item 1. The grommet according to Item 1. 3. The grommet according to claim 1, wherein the elastic portion is made of rubber, and an iron plate or a resin plate is used as a rigid plate for insert molding, while the rigid portion is made of resin.