JPH0433605Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to grommets used for protection, sound insulation, and waterproofing when wire bundles are installed through vehicle panels. This invention relates to a combination type grommet having a structure in which the grommets can be combined and fitted into one panel hole.

[Conventional technology]

Japanese Utility Model Publication No. 57-22653 includes a holding part into which a first member to be held, such as a wire bundle, can be pushed and held, and a fitting hole into which an inner grommet for pushing and holding a second member to be held can be fitted. By using a combination of an outer grommet and an inner grommet fitted into the fitting hole, the wire bundle and speedometer cable can be protected with separate holding parts.
And penetrate these using one panel hole,
A device that can be installed is disclosed. Furthermore, there is also one in which a single grommet is provided with holding portions for a plurality of wire bundles.

In the former case, the outer and inner grommets are both made of rubber and have a structure that allows the rubber parts to fit together, so there is a lot of friction when fitting them together, making it difficult to work with, and they also tend to come off due to their high elasticity in the fitted state. easy. On the other hand, in the latter case, when a bundle of wires is inserted into one holding part, the diameter of the hole is expanded, which reduces the diameter of the hole in the other holding part, making subsequent insertion difficult.

[Problem that the invention attempts to solve]

The purpose of the present invention is to solve the above-mentioned problems, avoid the trouble of fitting rubber parts with poor workability into the fitting holes, and make it possible to avoid the hassle of fitting rubber parts into fitting holes when inserting multiple members to be held into the holding part. To provide an integrated grommet that does not affect a holding part and therefore facilitates work.

[Means for solving problems]

In order to solve the above problems, the combined type grommet of the present invention consists of a pair of two-piece grommets each made of an elastic material such as synthetic rubber, and an insertion frame that connects the pair of two-piece grommets. The two-split grommet has a substrate part whose ends are butted together on one side, an opening having a diameter larger than that of a member to be held such as a bundle of electric wires, and a holding cylinder part that communicates with the opening and holds the member to be held which is inserted. and insert guides are provided above and below the abutting end surfaces of the substrate portion along the end surfaces, respectively,
Furthermore, a fitting groove is provided on the outer circumferential surface excluding the butted end surface to be connected to the panel hole, and when the two halves are butted, the insertion frame is fitted into the upper and lower insertion guides, and each halves are separated. It is characterized by having a structure in which the grommets are joined to form a watertight unit, and the combined board part is fitted into one panel hole.

[Effect]

A pair of split grommets can be very easily combined into one by fitting the insertion frame into the upper and lower insertion guides when the two are butted together, and has a structure in which they are fitted into one panel hole. Become.

Since the pair of split grommets are independent parts and the opening provided in the base plate has a larger diameter than the member to be held such as the wire bundle, there is no risk that the diameter of the opening will expand upon insertion. Therefore, the insertion and attachment of the electric wire bundle or the like into each holding cylinder does not affect the other, making the work easier. In addition, by fitting the combined grommet into the panel hole, the butted end surfaces are brought into closer contact, ensuring sound insulation and waterproof performance.

〔Example〕

As shown in FIGS. 1 to 3, the integrated grommet of the present invention consists of a pair of split grommets 4 each made of an elastic material such as synthetic rubber.
E, 4F, and an insertion frame 5f that connects the two.

The two-split grommets 4E and 4F have the same structure, and have openings 2a and 2b that are large enough to insert a member to be held such as the wire bundle W into the thick substrate portions 1e and 1f, respectively, and the openings 2a and 2b. It is constructed by providing holding cylinder parts 3a and 3b that protrude in communication with the holding member 2b and hold the inserted member to be held. Opening 2
The inner diameters of a and 2b are as shown in FIG.
It is made sufficiently larger than the wire bundle W so that the board parts 1e and 1f are not distorted or deformed due to the insertion of the wire bundle W.

Each of the substrate parts 1e and 1f has a semi-elliptical shape with one side abutting end faces, and is divided into two along its short axis so that the combined substrate part 1 forms an ellipse. Insertion guides 5e having an L-shaped cross section are provided protrudingly above and below each butting end surface along the end surfaces, and insert frames 5f made of, for example, hard synthetic resin are fitted onto these insertion guides 5e. It is now possible to combine both into one.

In addition, a fitting groove 6 for the hole 10 of the panel P (see FIG. 3) is provided on the outer circumferential surface of both the substrate portions 1e and 1f, excluding the abutting end surfaces, and a tapered portion is provided to facilitate the fitting operation. 7 and an ear piece 8 are provided. Each of the holding cylinders 3a and 3b is provided with a plurality of annular protrusions 9 for reinforcement and to prevent the held member from slipping or shifting.

When using the integrated grommet of this invention,
First, the pair of halved grommets 4E and 4F are butted against each other, and the insertion frames 5f are fitted into the insertion guides 5e on both the upper and lower surfaces of both the base plate parts 1e and 1f, and the two are combined to assemble one grommet.

The wire bundle W etc. may be inserted into the holding cylinder parts 3a, 3b either before or after the combination. This is because the inner diameters of the openings 2a and 2b are larger than the outer diameter of the wire bundle W, so the thick substrate parts 1e and 1f and the insertion guide 5e are able to insert the wire bundle W into the holding cylinder parts 3a and 3b. This is because, even if worn, none of them will be affected or deformed.

The combined grommet is fitted and fixed into the hole 10 of the panel P through the fitting groove 6, as shown in FIG. By fitting into the panel, the board portion 1e,
The abutting end faces of 1f are tightened to create a watertight state, and will not come off from each other and will not impair waterproofness or sound insulation. Further, when one wire bundle W is to be replaced, for example, it can be easily done without affecting the others by removing the combined grommet from the panel and disassembling the grommets 4E and 4F.

In this way, a pair of split grommets 4E,
If the 4Fs are made to have the same shape, they can be molded with one mold, which can significantly reduce manufacturing costs including mold costs, but if the structure of the connecting part of both grommets is the same, If so, they may have different shapes, such as one of the grommets 4E and 4F being semi-elliptical and the other being circular or rectangular.

[Effect of idea]

As explained above, according to the present invention, insertion guides are provided above and below the abutting end surfaces of a pair of split grommets along the knurled end surfaces, and when the two are abutted, an insertion frame is fitted into the grommets. They can be combined into one panel hole and fitted into one panel hole, making it easier to insert wire bundles, etc. into each holding cylinder without affecting other parts, and
By fitting the combined grommets into the panel holes, the butted end surfaces will adhere more tightly, ensuring sound insulation and waterproof performance. Further, it is also possible to make the pair of split grommets have the same structure, and the cost including the mold cost can be significantly reduced.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a combined grommet showing an embodiment of the present invention before combination, and Fig. 2 is a -
3 is a cross-sectional view of the integrated grommet of FIG. 1 in use. 1e, 1f...Base part, 2a, 2b...Opening, 3a, 3b...Holding cylinder part, 4E, 4F...Half-split grommet, 5e...Insertion guide, 5f...
...Insert frame, 6...Fitting groove.

Claims (1)

[Claims for Utility Model Registration] Consisting of a pair of two-piece grommets, each made of an elastic material such as synthetic rubber, and an insertion frame for connecting the pair of two-piece grommets, each of the pair of two-piece grommets butting each other on one side. The end surface of the substrate is provided with an opening having a diameter larger than that of the member to be held such as a wire bundle, and a holding cylinder part that communicates with the opening and holds the inserted member. Insert guides are provided above and below the butt end faces along the end faces, respectively,
Furthermore, a fitting groove is provided on the outer circumferential surface excluding the butted end surface to engage with the panel hole, and when the two split grommets are butted, the insertion frame is fitted into the upper and lower insertion guides. A combined type grommet characterized by having a structure in which two halves of the grommet are combined in a watertight manner, and the combined board part is fitted into one panel hole.