JPH0441526Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to the improvement of grommets, and more specifically, the invention relates to the improvement of grommets that do not require large force to fit into the mounting hole. This relates to grommets that can be easily installed without having to do anything.

(Prior art) For example, when pulling out a wire harness from a panel of a car body in a car, etc., a grommet is attached to a pull-out hole provided in the panel, and by inserting the wire harness through the grommet, foreign objects are prevented from entering the equipment. are prevented from entering.

As a conventional grommet used for such a purpose, for example, one having the configuration shown in FIG. 2 is used.

That is, the conventional grommet 5 shown in FIG.
0 is a circumferential groove 52 for fitting into the hole H of the panel P.
a main body portion 51 having a tape winding portion 53 formed on the free end side of the main body portion 51;
1 and a wire harness insertion section 54 communicating with the tape winding section 53 by integrally molding the wire harness insertion section 54 with an elastic material such as rubber.

In this conventional grommet 50, the wire harness A is inserted into the wire harness insertion portion 54, the tape winding portion 53 and the wire harness A are wrapped and fixed with tape B, and then the main body portion 51 is inserted into the hole H of the panel P. , the circumferential groove 52 and the hole H in the panel P
It is put into practical use by fitting the inner peripheral edge of the

(Problem to be solved by the invention) However, the conventional grommet 50 described above
Although the outer periphery 50a of the main body portion 51 is tapered to facilitate fitting into the hole H of the panel P, it is made of a material with a large coefficient of friction such as rubber. Therefore, a large frictional resistance is generated between the inner circumferential edge of the hole H during fitting, and an extremely large force is required to fit the circumferential groove 52 of the main body portion 51 and the inner circumferential edge of the hole H. It was hot.

The present invention was achieved as a result of studies to solve the above-mentioned problems with conventional grommets, and its purpose is to eliminate the need for large force when fitting into panel holes. To provide a grommet that can be easily installed.

[Structure of the invention] (Means for solving the problem) In other words, the grommet of the invention includes a main body portion formed with a circumferential groove for fitting into the mounting hole and tapered toward the free end side. A tape winding portion having a protrusion on an inner circumferential wall provided on the free end side of the main body portion, and a wire harness insertion portion communicating from the main body portion to the tape winding portion are integrally molded from lubricant-containing rubber. It is something to do.

(Function) The grommet of the present invention is integrally molded from lubricant-containing rubber, and has a protrusion on the inner peripheral wall of the tape winding part, so that the main body part can be inserted into a hole to be installed such as a hole in a panel. When fitting the groove to the inner circumferential edge of the hole, the frictional resistance between the main body and the inner circumferential edge of the hole can be reduced, and the fitting and installation can be carried out extremely easily without the need for large force. It is also possible to significantly improve the fixation and waterproofness of the harness.

(Embodiments) Hereinafter, embodiments of the grommet of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an explanatory side cross-sectional view showing the grommet of the present invention, including the state in which a wire harness is inserted.

In FIG. 1, 10 is a grommet, 11 is a grommet main body, 12 is a circumferential groove for fitting into the mounting hole, that is, the hole H of the panel P, and 13 is a small diameter groove provided on the free end side of the main body 11. Tape winding part, 1
Reference numeral 6 denotes a wire harness tightening portion consisting of a protrusion provided on the inner peripheral surface of the tape winding portion 13; 14 represents a wire harness insertion portion communicating from the main body portion 11 to the tape winding portion 13; The surface is tapered toward the tape winding portion 13 in order to facilitate fitting into the hole H of the panel P, and these surfaces are integrally molded with lubricant-containing rubber. Lubricant-containing rubber is a mixture of silicone rubber and other lubricants such as relatively high-molecular-weight, low-volatility oils such as silicone oils, rubber softeners, and plasticizers. If the grommet is integrally molded with lubricant-containing rubber, the surface of the grommet, especially the outer peripheral tapered part of the main body 11, will always be lubricated, so when inserting the grommet 10 into the hole H of the panel P, the main body 11 and the hole Not only can the frictional resistance with the inner circumferential edge of H be reduced, making fitting and mounting extremely easy, but also the slipperiness when inserting the wire harness A into the wire harness insertion portion 14 can be improved. Wire harness A can be easily aligned,
Furthermore, the effect of improving waterproofness can be obtained.

When the grommet 10 of the present invention is actually used, as shown in FIG. Then, a part of the wire harness A wrapped with tape is inserted into the hole H of the panel P, and a force is applied to the state shown by the two-dot chain line by pulling or pushing the wire harness A.

Then, the outer periphery of the main body 11 is aligned with the hole H of the panel P.
Even if it makes contact with the inner circumferential edge of the hole H, the outer circumferential surface of the main body 11 moves smoothly without requiring a large force because the frictional resistance is reduced, and the inner circumferential edge of the hole H is brought into contact with the circumferential groove 12. When engaged, panel P of grommet 10
The fitting and installation is completed.

Further, since the wire harness tightening portion 16 consisting of a protrusion is provided on the inner wall of the tape winding portion 13, that is, on the portion of the wire harness insertion portion 14,
While it is possible to improve the fixity after the position of the wire harness A is determined, it is also possible to significantly improve waterproofness.

[Effects of the invention] As explained above, the grommet of the invention has the following effects:
The main body is molded from oil-impregnated rubber, or the entire grommet is integrally molded from lubricant-containing rubber, so the main body can be inserted into a mounting hole such as a panel hole, and the circumferential groove should fit into the inner circumferential edge of the mounting hole. When tightening, the tapered surface of the main body is squeezed by the periphery of the mounting hole, and the lubricant inside the main body rapidly seeps out onto the tapered surface.
The frictional resistance between the main body and the inner circumferential edge of the mounting hole can be reduced, and fitting and mounting can be performed extremely easily without the need for a large amount of force. The waterproofness between the mounting hole and the main body can be significantly improved.

Furthermore, since the protrusion is provided on the inner circumferential wall of the tape winding portion, the harness can be fixed well after positioning, and waterproofness can also be improved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory side cross-sectional view showing the grommet of the present invention including the wire harness insertion operation state, and FIG. 2 is an explanatory side cross-sectional view of a conventional grommet. 10... Grommet, 11... Main body, 12...
... Peripheral groove, 13 ... Tape winding part, 14 ... Wire harness insertion part, 16 ... Wire harness tightening part.

Claims (1)

[Scope of utility model registration request] A main body portion formed with a circumferential groove for fitting into the mounting hole and tapered toward the free end side, and a tape winding portion provided on the free end side of the main body portion and having a protrusion on the inner peripheral wall. A grommet, characterized in that the wire harness insertion portion communicating from the main body portion to the tape winding portion is integrally molded from lubricant-containing rubber.