JPH08124441A - Grommet for cylindrical wire harness - Google Patents

Abstract

PURPOSE: To stabilize and enhance the operability for mounting a grommet on wire harness by mounting a metallic snap ring having a locking portion for the opposite edges of a slit cut along the inner periphery of the cylindrical shell of the grommet and along the direction of the axis of the grommet. CONSTITUTION: This grommet 1 for cylindrical wire harness is mounted, by elastically opening its slit 2, on an adhesive tape 6 wound on a predetermined position of wire harness 5, and the tape 6 passed through the slit 2 is further wound on a shell 4 so that the grommet is set and clamped to a vehicle body side holding member. A pair of snap rings 8 each made of spring steel wire or the like are inserted into the inner peripheries of both ends of the shell 4, and a U-hook 9 locked to the opposite edges 10 of the slit 2 is positioned at the root of the inner periphery of a rib 3 and mounted. The rigidity and elastically restoring force of the shell 4 are thereby enhanced, and the grommet 1 is prevented from deforming when used singly or when mounted on the harness 5, and can be stably held in its normal shape.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular wire harness which is attached to a clamp point of a wire harness to be clamped on a holding member on the vehicle body side and is used for smoothing the protection of the wire harness and the clamping to the vehicle body side. For grommets.

[0002]

2. Description of the Related Art A grommet 1 for a tubular wire harness (see FIG. 3) is made of a rubber elastic body having a cylindrical shape to be fitted into a holding member provided on the vehicle body side, and a slit 2 which axially cuts a peripheral wall thereof is provided. It has a different shape. Then, the adhesive tape 6 is wound around the clamp point of the wire harness 5 to be clamped on the holding member on the vehicle body side, and the slit 2 is elastically opened and fitted, and then the adhesive tape 6 passed through the slit 2. Is wound around the outer circumference of the body portion 4 of the grommet 1 and set. Reference numeral 3 in the drawing denotes ribs provided on both edges of the body portion 4.

[0003]

The conventional tubular wire harness grommet 1 described above is easily deformed by an external force because it is a flexible elastic tubular body (see FIG. 3C) and is stored as a single item. To the opposite edge 10 of the slit 2
May have a shape displaced in the direction of the cylinder axis 7, and when mounted and set on the wire harness 5 in such a deformed state, the shape relative to the holding member on the vehicle body side is collapsed, and clamp fixing is not performed. Can be difficult or impossible,
This is a factor that reduces the workability of disposing the wire harness 5 on the vehicle body.

Further, the clamp 1 for the wire harness 5
This is a troublesome work of carefully winding the tape while confirming the deformed state of each of the mounting sets and adjusting the deformed state one by one, so the mounting work to the wire harness 5 is complicated and troublesome. .

The present invention provides a grommet for a tubular wire harness that solves the above-mentioned drawbacks of the prior art.

[0006]

The grommet for a tubular wire harness of the present invention which solves the above technical problems is described as follows: "The circumferential wall of the tubular body has a slit that cuts in the axial direction, and is provided on the outer circumference of the wire harness. In a rubber elastic tubular wire harness grommet to be fitted and attached, the grommet is provided along both sides in the circumferential direction of the inner circumference of the tubular body and has engaging portions at opposite edges of the slit. It has a structure with a metal snap ring ". Incidentally, the snap ring of the present invention has a notched annular shape and has a corresponding rigidity and elasticity, and elastically expands in diameter by an external force that opens the notched portion, and is elastically restored to its original shape by removing the external force. It means a normal snap ring.

[0007]

In the tubular wire harness grommet of the present invention having the above-described structure, since the snap ring is attached along the circumferential direction of the tubular body, even if the tubular body is elastically deformed by an external force. , The elastic restoring force of the snap ring restores itself to a normal state, and the rigidity of the snap ring prevents deformation of the tubular body against a small external force and maintains a normal posture. be able to.

[0008]

Embodiments will be described in detail below based on embodiments. That is, with reference to FIG. 1 showing the first embodiment of the present invention, it is composed of a body portion 4 of a short tubular body having an inner diameter substantially the same as the diameter of a wire harness 5 to be mounted, and a peripheral wall of the body portion 4 is an axis. In the grommet 1 for a tubular tubular wire harness made of rubber, which has slits 2 cut through in the direction, and further provided with ribs 3 protruding outward on both ends of the body portion 4, the body portion 4 has a body portion. Four
A pair of snap rings 8 are mounted along the inner periphery of the slit 1, the both ends of which are engaged with the opposite edges 10 of the slit 2.

That is, the snap ring 8 is an elastic ring made of a metal wire material such as a spring steel wire, a carbon steel wire, a phosphor bronze wire, or a stainless wire, and is the same as the inner circumference of the body portion 4 in a free state. Has a sufficient rigidity to hold the shape of the body portion 4 and an elasticity that allows elastic deformation with respect to an external force, and both end portions are engaged with each of the opposing edge portions 10. The U-shaped hook 9 is formed on the engaging portion of the U-shaped hook 9 that retains the mounting posture of the body portion 4 by being engaged. Then, the pair of snap rings 8 are individually inserted into the inner circumferences of both end portions of the body portion 4, are attached to the inner circumference of the inner circumference with a "pitt", and are locked to the facing edge portion 10. U-shaped hook 9 is rib 3
It has a structure that is mounted at the inner root of the.

The tubular wire harness grommet 1 (see (B) and (C) of FIG. 1) is elastically opened with the slit 2 on the adhesive tape 6 wound around the wire harness 5 at a predetermined position. Then, the adhesive tape 6 that has passed through the slit 2 is further wound around the body portion 4 and mounted and set, and is clamped by a holding member on the vehicle body side.

The grommet 1 of the embodiment shown in FIG. 1 has a pair of snap rings 8 mounted thereon, and both ends of the snap rings 8 are locked to the edge portions 10 of the slits 2 so as to be substantially integrated with the body portion 4. Therefore, the rigidity of the body portion 4 rich in elasticity is improved, and the elastic restoring force from the elastic deformation due to the external force is improved. Therefore, it is possible to prevent the grommet 1 from being deformed in a single state or deformed when it is mounted and fixed to the wire harness 5, and the normal shape can be stably maintained.

The tubular wire harness grommet 1 of the present invention is not limited to the above-described embodiment, and a snap ring 2 made of a band material may be attached as shown in FIG.

[0013]

As described above, since the grommet for a tubular wire harness of the present invention stably maintains the normal tubular posture, it is unnecessary to check the deformation when attaching the wire harness to the wire harness. There is an effect that the workability of mounting on the harness is improved, the performance as a clamp point on the vehicle body side is stabilized, and the workability of disposing the wire harness on the vehicle body assembly line is stably improved.

[Brief description of drawings]

FIG. 1 shows a grommet for a tubular wire harness according to a first embodiment of the present invention, (A) is a perspective view of its constituent members, and (B).
Is a central cross-sectional view showing a mounting state and a mounting procedure on the wire harness, and (C) is a perspective view of the mounting state on the wire harness.

FIG. 2 is a perspective view of a snap ring of a grommet for a tubular wire harness according to another embodiment of the present invention.

3A and 3B show a conventional grommet for a tubular wire harness, in which FIG. 3A is a perspective view of its use state, and FIGS. 3B and 3C are side views of the wire harness attached to the wire harness.

[Explanation of symbols]

 1 Grommet for tubular wire harness 2 Slit 3 Rib 4 Body part 5 Wire harness 6 Adhesive tape 7 Wire harness shaft center 8 Snap ring 9 U-shaped hook 10 Edge part

Claims (2)

[Claims] 1. A grommet for a rubber-made tubular wire harness, which is made of rubber and has an axially cut slit in a peripheral wall of the tubular body, and which is fitted and mounted on the outer periphery of the wire harness. A grommet for a tubular wire harness, characterized in that a metal snap ring is attached to the inner periphery of the slit in the circumferential direction, and the snap rings made of metal having locking portions to the opposite edges of the slit are attached at both ends. 2. The grommet for a tubular wire harness according to claim 1, wherein a pair of snap rings made of a wire material are attached to both ends of the tubular body, one for each end.