JPH11203972A - Grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grommet capable of performing removal work from a mount counterpart without using a removing jig. SOLUTION: This grommet has a wire engagement cylinder part 2 and a plug-in mounting part 7 being provided at its proximal end, the mounting part for mounting it by plugging a mount part 4a of a mount counterpart. A cantilever supported lock operation arm 15 is provided at the plug-in mounting part 7. A lock protrusion 16 to be locked at a lock recess part of the mount part 4a of the mount counterpart is provided at the lock operation arm 15.

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 provided at a wire penetrating portion of a case such as an electric junction box for an automobile and seals the wire penetrating portion.

[0002]

2. Description of the Related Art In a conventional grommet of this type, a grommet is inserted into a groove of a mounting portion of a case, such as an electric connection box, to which the grommet is to be mounted without being considered to be removed.

[0003]

However, in such a conventional grommet mounting structure, when removing the grommet from the mounting portion of the case during maintenance, the grommet can be removed without using a removing jig. In particular, if it is placed in a place where a large number of parts are mounted such as an engine room of a car, it may be necessary to remove it with a handhold, and it is very difficult to work with a removal jig There was a problem.

[0004] It is an object of the present invention to provide a grommet which can be detached from a mounting partner without using a jig.

[0005]

According to the present invention, there is provided an electric wire fitting tube portion and an insertion attachment portion provided at a base portion of the electric wire fitting tube portion for being inserted into an attachment portion of an attachment partner. Is to improve the grommet.

[0006] In the grommet according to the present invention, the insertion operation portion is provided with a cantilever-supporting lock operation arm. The lock operation arm is provided with a lock projection for locking to a mounting portion of a mounting partner.

In such a grommet, when the insertion portion is inserted into the attachment portion of the attachment partner, the lock projection is fitted into the lock recess of the attachment partner to be in a locked state.
It will not come off.

When the grommet is removed from the mounting portion of the mounting partner during maintenance, the lock operation arm may be simply operated in a direction in which the lock projection comes out of the locking recess of the mounting partner, and the removal jig is not used. Thus, it can be easily detached by one-handed operation, and the detaching operation can be easily performed even in the state of holding a hand.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 3A to 3C show a first embodiment of a grommet according to the present invention, and FIG. FIG. 2 is a perspective view of the grommet according to the present embodiment before assembling showing a relationship, and FIG. 3A is a front view showing a mounting state of the grommet of the embodiment to a case, and FIG. )
FIG. 3A is a plan view showing a state in which an upper case portion is removed in FIG. 3A, FIG. 3C is a cross-sectional view taken along line XX of FIG.
FIG. 3D is a sectional view taken along line YY of FIG.

The grommet 1 includes a wire fitting tube 2 made of rubber or the like, which penetrates an electric wire such as a wire harness in a liquid-tight manner, and a case 3 provided at the base of the wire fitting tube 2 for mounting. The U-shaped insertion grooves 5a and 6a provided in the mounting portion 4a of the half split structure in the lower case portion 3a of the half split structure and the mounting portion 4b of the half split structure in the upper case portion 3b of the half split structure are provided. Reverse U
It is the same as the conventional one in that it comprises an insertion mounting portion 7 made of plastic or the like for insertion into the letter-shaped insertion grooves 5b and 6b.

That is, the case 3 has a half-split structure of the lower case portion 3a and the upper case portion 3b. The lower case portion 3a and the upper case portion 3b are provided with through holes 8 at positions where electric wires such as a wire harness are drawn.
And the mounting portions 4a and 4b having a half-split structure are integrally provided. The mounting portion 4a of the half-split structure provided in the lower case portion 3a is provided with U-shaped insertion grooves 5a and 6a that open upward along the inner periphery thereof.
The mounting portion 4b of the half-split structure provided in the upper case portion 3b is opened downward along the inner periphery thereof so as to have an inverted U shape.
Character-shaped insertion grooves 5b and 6b are provided.

Particularly, in this embodiment, a lock recess 9 for locking the insertion mounting portion 7 is provided below the lock engagement portion 10 in the mounting portion 4a of the half-split structure provided in the lower case portion 3a. Have been. The lock concave portion 9 and the lock engaging portion 10 are respectively provided at the rising portions on both sides of the U-shaped mounting portion 4a with the through hole 8 interposed therebetween.

The insertion mounting portion 7 is a wire fitting tube for attaching the wire fitting tube portion 2 to both ends of a tube portion 12 having a through hole 11 and inserting the wire fitting tube portion 2 into the insertion grooves 5a, 5b of the mounting portions 4a, 4b. Mounting flange portion 13 and insertion flange portion 1 for insertion into insertion grooves 6a, 6b of mounting portions 4a, 4b.
4. A rubber wire fitting tube 2 is mounted on the wire fitting tube mounting flange 13 by covering its base 2a.

On the left and right sides of the tubular portion 12 between the wire fitting tubular portion mounting flange portion 13 and the insertion flange portion 14, a lock operation arm 15 has its lower end positioned adjacent to the insertion flange portion 14 side. , And are provided vertically in a cantilevered manner. These left and right lock operation arms 1
5 has a free upper end so that it can be bent in a direction in which the upper ends approach each other. Each of the left and right lock operation arms 15 is provided with a lock projection 16 to be fitted and locked in each of the lock recesses 9 on the left and right sides of the mounting portion 4 a of the case 3.

When such a grommet 1 is inserted into the mounting portion 4a of the mounting partner and the mounting portion 7 is inserted, the lock projection 16 is fitted into each lock recess 9 of the mounting portion 4a of the mounting counterpart, and the lock engaging portion is formed. It gets stuck on 10 and becomes locked and will not come off.

After the mounting of the grommet 1 in this manner, the upper case 3b is put on the lower case 3a, and the mounting portion 4b of the upper case 3b is put on the plug-in mounting portion 7.

When the grommet 1 is detached from the mounting portion 4a of the lower case portion 3a to be mounted at the time of maintenance, the lock projection 16 is simply provided with the locking recess of the mounting portion 4a with the upper case portion 3b removed. It is sufficient to operate the lock operation arm 15 so as to bend in the direction from which the lock operation arm 9 is removed, and the lock operation arm 15 can be easily removed by one-hand operation without using a removal jig. In particular, when the lock operation arms 15 are present on the left and right sides of the cylindrical portion 12 as in this example, the tips of the left and right lock operation arms 15 are pinched by the thumb and the other hand of one hand in the direction of approaching each other. When the left and right lock operation arms 15 are bent, the respective lock projections 16 are disengaged from the respective lock recesses 9 of the mounting portion 4a. In this state, when the left and right lock operation arms 15 are picked up, the insertion mounting portion 7 is easily mounted. 4g, the grommet 1 can be removed.

FIG. 4 is a perspective view showing a second example of the embodiment of the grommet according to the present invention.

The grommet 1 shows an example in which the present invention is applied to a type in which the insertion mounting portion 7 is inserted into the through hole 8 of the case 3 from a direction perpendicular to the plate surface of the case 3 and mounted. It is.

In the case 3, a portion around the through hole 8 is a mounting portion 4, and the mounting portion 4 around the through hole 8 is provided.
Also function as a lock engagement portion 10 and this through hole 8
The space on the back surface of the mounting portion 4 around the space acts as the lock recess 9.

In the grommet 1 of the present embodiment, the lock operation arms 15 are disposed along the axial direction of the grommet 1 on both left and right sides of the insertion mounting portion 7.
Has a base end that is cantilevered by the grommet 1 and has a locking projection 16 protruding outward on a side surface in the middle.

When such a grommet 1 is inserted into the through hole 8 of the mounting portion 4 to be mounted, the mounting portion 7 is inserted.
The lock projection 16 fits into the lock concave portion 9 of the mounting portion 4 of the mounting partner and is caught by the lock locking portion 10, so that the lock projection 16 is locked and does not come off.

[0023]

In the grommet according to the present invention, the lock operation arm is provided at the insertion mounting portion with cantilever support,
Since the lock operation arm is provided with a lock projection for locking to the attachment portion of the attachment partner, when the insertion attachment portion is inserted into the attachment portion of the attachment partner, the lock projection is fitted into the lock recess of the attachment partner and the lock is formed. It will be in a state and will not come off. For this reason, when removing the grommet from the mounting portion of the mounting partner for maintenance, it is sufficient to simply operate the lock operation arm in the direction in which the lock projection comes out of the locking recess of the mounting partner, without using a removal jig. It can be easily detached by one-handed operation, and can be easily detached even when holding it by hand.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first example of an embodiment of a grommet according to the present invention, showing a state before being assembled into an attachment partner.

FIG. 2 is a perspective view showing a grommet insertion mounting portion of the present embodiment.

FIG. 3A is a front view showing a state in which the grommet of this example is attached to a case, FIG. 3B is a plan view of FIG. 3A with the upper case removed, and FIG. (D) is a sectional view taken along the line YY of (A).

FIG. 4 is a perspective view showing a second example of the embodiment of the grommet according to the present invention, showing a state before the grommet is assembled into an attachment partner.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Grommet 2 Electric wire fitting cylinder part 3 Case 3a Lower case part 3b Upper case part 4, 4a, 4ba Attachment part 5a, 5b, 6a, 6b Insertion groove 7 Insertion attachment part 8 Through hole 9 Lock recess 10 Lock engagement part 11 Through-hole 12 Tube part 13 Flange part 14 Insert flange part 15 Lock operation arm 16 Lock protrusion

Continued on the front page. (72) Inventor Kazuo Miyajima 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Inside Furukawa Electric Co., Ltd. (72) Inventor Wataru Suehiro 2-6-1 Marunouchi, Chiyoda-ku, Tokyo Furukawa Electric Industrial Co., Ltd.

Claims (1)

[Claims] 1. A grommet provided with an electric wire fitting tube portion and an insertion attachment portion provided at a base portion of the electric wire engagement tube portion to be inserted into and attached to a mounting portion of an attachment partner. A grommet comprising: a lock operation arm provided with a cantilever support in the portion; and a lock protrusion for locking the lock operation arm to the mounting portion of the mounting partner.