JPH0310577Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a wiring grommet that seals a gap between a hole drilled in a wall such as a panel and a cable inserted into the hole.

[Conventional technology and problems]

Conventional grommet technology that seals the gap between a cable inserted into a hole in a panel of a vehicle, etc. and the hole, and supports the cable so as not to damage it is as follows:
For example, there is a technique described in Japanese Utility Model Application Publication No. 59-155783.

That is, in FIG. 5, a soft grommet main body A has a tube 2 provided on the circumference of a hollow disc-shaped base 1, and an annular lip that elastically contacts a cable 3 on the circumferential surface of the tube 2. A plurality of numbers 4 are provided protrudingly.

A tape 5 is then wrapped around the tube 2 and the cable 3 to ensure a seal between them.

A cylindrical peripheral wall 6 is connected to the outer peripheral edge of the base 1 on the side opposite to the tube 2, and an annular support part 7 is provided at the end of the peripheral wall 6 to protrude inward, and a hard resin lock is provided at the end of the peripheral wall 6. An engaging portion 9 having a stepped portion 8 that engages with member B and an annular lip 10 that contacts panel P are provided (see FIG. 6).

A base plate 12 of a resin locking member B is fitted into an annular recess 11 formed by the base 1 and the peripheral wall 6 and is locked by the support 7 .

The resin locking member B has a cylindrical peripheral wall 13 connected to the side surface of the substrate 12, and the end of the peripheral wall 13 is bent toward the center to form a bottom wall 14.

Further, locking pieces 15 are provided at a plurality of locations on the peripheral wall 13 in an outwardly cut-and-raised manner and fit into cable insertion holes of the panel P.

The locking piece 15 fits into the cable insertion hole of the panel P, and the grommet body A engages with the resin lock B.
The lip 10 of the grommet main body A comes into close contact with the panel P and seals the panel P.

As described above, the gap between the panel P and the cable 3 is sealed to prevent rainwater from entering, and the cable 3 is supported by the tube 2 without being damaged. However, as shown in FIG. However, when an external force F is applied to the cable, the lip 10 is pulled in the direction of the arrow 16, so that the support part 7 tends to come off from the base plate 12 of the resin lock member B.

The present invention provides a grommet in which the grommet body A does not come off from the substrate 12 even when an external force F acts on the cable 2.

[Means for solving problems]

In order to achieve the above object, the present invention involves fitting a hard resin locking member into an annular recess provided in a soft grommet body, and elastically inserting a locking piece of the resin locking member into a cable insertion hole of a panel, etc. a grommet that is fitted and locked in place and seals the cable and the cable insertion hole with the grommet body;
An annular groove is provided on the outer peripheral surface of the resin lock member,
The grommet main body is characterized in that an annular protrusion that is fitted into the annular groove is provided on the inner circumferential surface of the circumferential wall of the grommet main body, and that the circumferential wall is tightened by a retainer.

[Effect]

With the above structure, when the synthetic resin locking member is fitted into the annular recess of the grommet main body, the annular protrusion provided on the outer peripheral surface of the grommet main body engages with the annular groove of the synthetic resin locking member.

Therefore, even if an external force is applied, a gap is prevented from forming between the grommet body and the panel.

〔Example〕

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

Note that the same parts as in the conventional example are given the same reference numerals.

In FIG. 2, a soft grommet main body C has a hollow disk-shaped base 1 connected to a tube 2 and a peripheral wall 6, and an annular support part 7 is provided inwardly protruding from the end of the peripheral wall 6 for support. The part 7 is provided with an annular lip 10 that contacts the panel P, and the substrate 12 of the hard resin locking member D is fitted into the annular recess 11 formed by the base 1 and the peripheral wall 6, as is conventional. It is similar to

Further, as shown in FIG. 3, the resin locking member D has a cylindrical peripheral wall 13 connected to the side surface of a hollow disc-shaped base 12, and the end of the peripheral wall 13 is bent toward the center. A bottom wall 14 having holes is formed, and a peripheral wall 13
Similarly to the conventional example, locking pieces are provided at a plurality of locations in the form of an outward cut-and-raised shape.

However, in the present invention, an annular groove 17 is carved on the outer peripheral surface of the base plate 12 of the resin locking member D, and an annular projection 18 that engages with the annular groove 17 is projected on the inner peripheral surface of the peripheral wall 6 of the grommet body C. A shallow groove 19 is provided on the outer peripheral surface of the peripheral wall 6 at a position opposite to the annular projection 18 .

FIG. 4 shows a ring-shaped retainer 20 that is harder and more elastic than the grommet main body C.

The inner diameter dimension D of the retainer 20 is slightly smaller than the outer diameter dimension d of the groove 19 (see FIG. 2).

The grommet component constructed as described above is assembled into the hole of the panel P in the following manner.

As shown in Figure 1, first, grommet body C
The cable 3 is passed through the tube 2, and the tape 5 is wrapped around the tube 2 and the cable 3.

Next, the base plate 12 of the resin locking member D is fitted into the annular recess 11 of the grommet body C, and the annular protrusion 18 is fitted into the annular groove 17.
0 into the groove 19.

At this time, the peripheral wall 6 is tightened by the retainer 20, the inner peripheral surface of the peripheral wall 6 is pressed against the substrate 12, and the annular protrusion 18 fitted into the annular groove 17 is maintained in an engaged state.

Next, when the locking piece 15 of the resin locking member D is fitted into the hole of the panel P, the grommet is locked to the panel P by the elastic force of the locking piece 15, and the lip 10 seals the panel P. .

Therefore, even if an external force that pulls the cable 3 is applied to the grommet in the direction of arrow F, the annular groove 17 and the annular protrusion 18 are maintained in the engaged state by the tightening force of the retainer 20, and the peripheral wall 6 and the base plate 12 are Since no relative displacement occurs between the two, deformation and detachment of the locking portion 7 as shown in FIG. 6 does not occur.

Therefore, the resin lock member D will not fall off from the grommet body C.

Furthermore, since the lip 10 does not lift up as shown in FIG. 6, the grommet does not lose its sealing ability even when an external force is applied.

〔effect〕

In the present invention, the inner peripheral surface of the peripheral wall 6 is pressed against the substrate 12 by the tightening force of the retainer 20, and the annular protrusion 18 fitted into the annular groove is maintained in an engaged state.
Even if an external force is applied to the grommet body, the grommet body no longer separates from the resin locking member.

Furthermore, since no deformation occurs in the support portion, the sealing ability of the grommet body does not deteriorate.

[Brief explanation of the drawing]

1 to 4 show embodiments of the present invention.
The figure is a vertical cross-sectional view of the grommet incorporated in the panel, Figure 2 is a vertical cross-sectional view of the grommet body, Figure 3 is a vertical cross-sectional view of the resin locking member, Figure 4 is a vertical cross-sectional view of the retainer, and Figure 5 is a vertical cross-sectional view of the grommet. 6 is a vertical cross-sectional view of a grommet incorporated in a panel in a conventional example, and FIG. 6 is a vertical cross-sectional view of a main part showing a state in which an external force is applied to the grommet. C... Grommet body, D... Resin locking member, 1... Base, 2... Tube, 3... Cable, 5... Tape, 6... Peripheral wall, 7... Support part,
10... Lip, 11... Annular recess, 12... Substrate, 13... Peripheral wall, 14... Bottom wall, 15... Locking piece, 17... Annular groove, 18... Annular projection, 19...
...concave groove, 20...retainer.

Claims (1)

[Scope of utility model registration request] A hard resin locking member is fitted into the annular recess provided in the soft grommet body, and the locking piece of the resin locking member is elastically fitted and locked into the cable insertion hole of the panel, etc., and the cable is inserted through the grommet body. and a grommet for sealing the cable insertion hole, wherein an annular groove is provided on the outer peripheral surface of the resin locking member, an annular protrusion that is fitted into the annular groove is provided on the inner peripheral surface of the peripheral wall of the grommet body, and the peripheral wall is A grommet characterized by being tightened by a retainer.