JPH06253438A - Grommet - Google Patents

Abstract

PURPOSE:To make a grommet attached to right and left each door a common part, in the grommet attached to the door of, especially, an automobile. CONSTITUTION:In the condition after manufacture, the center axis of a grommet on the side of bellows 2 is straight, and a projection 2a is provided aslant (thetanot equal to f90 deg.) to the center axis of the bellows 2 in side view.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grommet used for wiring an automobile, and more particularly to electrically connecting an electric component arranged on the body side of the automobile and an electric component arranged on the door side of the automobile. The present invention relates to a grommet suitable as a grommet for an elastic rubber wire harness that is attached to a transition portion between a body and a door in order to protect the wire harness and ensure waterproofness and bending resistance.

[0002]

2. Description of the Related Art FIG. 4 is a schematic view showing a mounting position of a wire harness grommet which is mounted on a connecting portion between an automobile body and a door, and FIGS. 5 (a) and 5 (b) respectively show a conventional left door grommet. It is a top view which shows 11 and the grommet 16 for right side doors.

The grommets 11 and 16 are cylindrical members made of elastic rubber, and the bellows 1 is provided on the end side in the length direction.
2, 17 are provided. The bellows 12 and 17 improve the flexibility of the grommet when opening and closing the door, and
It is provided to prevent cracking and cracking of the grommet itself caused by bending in a harsh environment and for a long time. Further, flange portions 13, 14, 18, 19 are provided at both ends of the grommets 11, 16, respectively, and these flange portions 13, 14, 18, 19 are provided in the body and door of the automobile, respectively. It is designed to be fitted and fixed to. A wire harness is inserted through the insides of the grommets 11 and 16, and the electrical equipment arranged on the body side and the electrical equipment arranged on the door side are electrically connected via the wire harness.

[0004]

However, the above-mentioned conventional grommets have the following problems. That is, as an automobile door grommet, as shown in FIG.
As shown in (b), two types of grommets that are symmetrical with each other, that is, the left door grommet and the right door grommet are required. For this reason, the conventional grommets have problems that the two types of grommets for the right side door and the left side door are individually manufactured, resulting in high product cost and complicated parts management.

By the way, by manufacturing the grommet 21 having the shape shown in FIG. 6A and twisting the bellows 22 on the flange 23 side, as shown in FIGS. 6B and 6C, the left door grommet and It is possible to use a grommet for the right door. However, the grommets shown in FIGS. 6B and 6C have a problem that the bellows 22 is bent because the twist of the bellows 22 is further increased when the door is opened. Hereinafter, this problem will be described in more detail.

In the conventional grommet, as shown in FIG. 7, the central axis of the grommet and the bellows convex portion 21a are seen in a side view.
The angle formed by and is always right, and the central axis of the bellows is a curve. In a grommet having such a bellows, the locus of the center of the flange when the bellows is bent is shown in FIG.
As shown by the alternate long and short dash line, it has an arc shape. However, if the grommet is actually attached to the automobile and the door is opened and closed, the center of the flange portion moves linearly as shown in FIG. Therefore, in the grommets shown in FIGS.
When the flange is moved linearly by opening and closing the door,
Unreasonable force is applied to the bellows, causing the bellows to bend as shown by the broken line in FIG. When the bellows is broken in this way, the flexibility of the grommet is deteriorated and the grommet is easily damaged.

It is also conceivable to form a grommet so that the central axis of the bellows 32 is perpendicular to the mounting surface of the flange portion 33, as shown in FIG. In this case, the center of the flange portion can be linearly moved without difficulty. However, when the grommet has such a shape, when the wire harness is inserted into the grommet, the connector 34 at the tip of the harness is caught on the corner of the grommet, which makes the insertion work of the wire harness complicated. Occurs.

The present invention has been made in view of the above problems, and provides a grommet which can be attached to either the left or right door, has good flexibility, and can avoid damage due to opening and closing of the door. The purpose is to do.

[0009]

A grommet according to the present invention is a grommet for a wire harness in which a bellows is provided on a peripheral surface of the grommet and a wire harness is inserted inside thereof. It is characterized in that each convex portion of the bellows is provided so as to be inclined.

[0010]

In the present invention, the bellows convex portions are provided to be inclined with respect to the central axis of the grommet in a side view. In the grommet provided with such a bellows, the center of the flange portion can be linearly moved without difficulty. Therefore, the grommet according to the present invention can be attached to either the left or right door, and the bellows can be prevented from being broken due to the opening and closing of the door.

[0011]

Embodiments of the present invention will now be described with reference to the accompanying drawings.

FIG. 1 is a side view showing a bellows portion of a grommet according to an embodiment of the present invention.

In the present embodiment, the central axis of the grommet 1 on the side of the bellows 2 is a straight line in the state after manufacturing (that is, the state before the actual vehicle is attached), and the central axis of the bellows 2 is the same as that of the bellows 2 in a side view. On the other hand, the convex portion 2a forming the bellows 2 is provided so as to be inclined (θ ≠ 90 °). In this embodiment, the angle θ is set to about 45 °. Further, the grommet 1 has a flange portion 3 provided at the end portion on the side of the bellows 2 with a mounting surface provided at an angle substantially equal to the inclination angle of the convex portion 2a with respect to the central axis of the bellows 2.

In the grommet according to this embodiment, the convex portion 2a is provided so as to be inclined with respect to the central axis of the bellows 2. Therefore, as shown in FIG. 2, the center of the flange portion 2 is reasonably linear. You can move.

FIG. 3A shows a grommet 1 according to this embodiment.
It is a top view which shows the whole. This grommet 1 is a bellows 2
By twisting in a predetermined direction, a left door grommet shown in FIG. 3B is obtained, and by twisting in the opposite direction, a right door grommet shown in FIG. 3C is obtained. In this state, the grommet is attached between the vehicle body and the door. The grommet according to the present embodiment, even if the door is opened and closed,
Since the flange portion 3 moves on a straight line without difficulty, it is possible to prevent the grommet from being broken.

In this embodiment, the grommet for each of the left and right doors can be made into a common component, and the product cost can be reduced and the management of the components can be facilitated. Further, even if the door is opened and closed in the state of being attached to the actual vehicle, the bellows does not have an unreasonable force, so that the bellows does not break and the bendability is good. Furthermore, since the central axis of the grommet on the bellows side is straight before it is attached to the door, it is possible to avoid the connector from being caught in the grommet when inserting the wire harness into the grommet, and workability when inserting the wire harness. Is good.

[0017]

As described above, in the present invention,
In a side view, since each convex portion of the bellows is provided so as to be inclined with respect to the central axis of the bellows, it is possible to make the grommet attached to each of the left and right doors a common part, which can reduce the product cost and the parts. Management becomes easier. In addition, the grommet according to the present invention has good flexibility, and can avoid bending of the bellows due to opening and closing of the door.

[Brief description of drawings]

FIG. 1 is a side view showing a bellows portion of a grommet according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing movement of the center of the flange portion of the grommet according to the embodiment of the present invention.

3A is a plan view showing an entire grommet according to an embodiment of the present invention, FIG. 3B is a plan view in the case of a left door grommet, and FIG. 3C is a plan view in the case of a right door grommet. It is a top view.

FIG. 4 is a schematic view showing a mounting position of a wire harness grommet that is mounted on a transition portion between a body of an automobile and a door.

5A and 5B are plan views showing a conventional left door grommet and a conventional right door grommet, respectively.

FIG. 6A is a plan view showing an example in which a grommet to be attached to each of the left and right doors is considered as a common component, FIG. 6B is a plan view of a left door grommet, and FIG. 6C is a right door grommet. It is a top view in the case of.

FIG. 7 is a side view showing the same problem.

FIG. 8 is a side view showing the same problem.

FIG. 9 is a side view showing the same problem.

FIG. 10 is a side view showing another example in consideration of making the grommets attached to the left and right doors common parts.

[Explanation of symbols]

 1, 11, 16, 21; Grommet 2, 12, 17, 32; Bellows 2a, 22a; Convex portion 3, 13, 14, 18, 19, 23, 33; Flange portion 34; Connector

Claims (1)

[Claims] 1. A wire harness grommet in which a bellows is provided on a peripheral surface thereof and a wire harness is inserted therein, and each convex portion of the bellows is provided to be inclined with respect to a central axis of the bellows in a side view. Grommet characterized by having.