JPH0310575Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a grommet that seals, protects and supports a wire harness, etc., routed through a through hole provided in a panel, etc. In particular, the present invention relates to a grommet that can prevent the grommet main body from falling off from a resin lock when an external force is applied to a wire harness or the like.

[Conventional technology]

Conventional technologies related to grommets include, for example,
There is a technique described in Japanese Patent No. 59-155783.

As shown in FIG. 5, a grommet is used in combination with a soft grommet body 1 that is easily elastically deformable and a hard resin lock 7 that is locked into a through hole in a panel. In the grommet body 1, the outer peripheral edge of a hollow disk-shaped substrate 2 is bent into a U-shape, and the resin lock support portion 3, which is the tip of the bent portion, is almost parallel to the substrate 2.
An annular groove 4 is formed between the annular groove 4 and the resin lock support part 3, and inside the annular groove 4, ribs 5 for maintaining the width of the annular groove 4 are provided at multiple locations in the circumferential direction. .

A wire insertion tube 6 is provided on the inner peripheral edge of the board 2 and protrudes in the opposite direction of the resin lock support portion 3. A wire harness 10 inserted into the wire insertion tube 6 and a tape 11 are wrapped around the wire insertion tube 6. The wire harness 10 is fixed to the wire insertion tube 6 in a sealed state.

The hard resin lock 7 has a hollow disc-shaped upper wall 7.
a, a lower wall 7b substantially parallel to the upper wall 7a, and an upper wall 7
It has a cylindrical part 7c that connects the lower wall 7b and the cylindrical part 7c, and panel locking parts 8 having a shape cut and raised outward are provided at a plurality of locations on the cylindrical part 7c.

Then, the width of the annular groove 4 of the grommet body 1 is elastically deformed and expanded, and the upper wall 7 of the resin lock 7 is expanded.
By inserting the outer peripheral part of a into the annular groove 4,
When the resin lock 7 is fitted into the grommet body 1 to reinforce the grommet body 1, and the panel locking part 8 is press-fitted into the through hole (not shown) of the panel and locked, the lock 7 is attached to the edge of the grommet body 1. The annular protrusion 9 is brought into close contact with the panel, and the space between the grommet and the panel is sealed.

Thus, the gap between the wire harness 10 routed through the hole in the panel and the hole in the panel is sealed by the grommet, and the wire harness 10 is supported by the panel while being protected by the grommet (see FIG. 6). reference).

[The problem that the idea attempts to solve]

As shown in FIG. 7, when an external force as shown by arrow A is applied to the wire harness 10 supported by the grommet, the wire insertion tube 6 wrapped in tape 11 is pulled in the same direction as the wire harness 10. There was a risk that the soft grommet body 1 would be elastically deformed and the width of the annular groove 4 would expand, and the annular groove 4 would separate from the upper wall 7a, causing the grommet body 1 to come off from the resin lock 7.

The present invention aims to solve this problem and provides a grommet in which the grommet main body 1 does not come off from the resin lock 7 even if an external force is applied to the wire harness 10.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a hard resin lock 7 having a hollow disc-shaped upper wall 7a and a panel locking part 8 that fits into a hole in a panel, etc., and a hollow disc-shaped base plate. An annular groove 4 into which the outer periphery of the upper wall 7a is fitted is formed on the outer periphery of the substrate 2.
In this grommet, an engaging portion 13 is formed on the upper wall 7a of the resin lock 7, and the base plate 2 of the grommet body 1 is provided with a wire insertion tube 6 on the inner peripheral edge thereof. A locking portion 12 that engages with the engaging portion 13 is provided.

[Effect]

In the grommet configured as described above, the wire harness etc. inserted into the wire insertion tube 6 is sealed with tape together with the wire insertion tube 6, and the upper wall 7a of the resin lock 7 is installed in the annular groove 4 of the grommet body 1. After inserting and engaging the locking part 12 with the engaging part 13,
When the panel locking portion 8 is press-fitted into a through-hole or the like of the panel, a wire harness routed through the panel is supported by the panel.

When an external force acts on the wire harness supported by the panel and the wire harness is pulled, the wire insertion tube 6 is pulled in the same direction, but the locking part 12 and the engaging part 13 are not engaged. Therefore, elastic deformation of the substrate 2 is prevented and the width of the annular groove 4 does not increase.

Therefore, the grommet body 1 cannot be removed from the resin lock 7.

〔Example〕

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

FIG. 1 is a partial perspective view of the grommet main body 1, in which the outer peripheral edge of a hollow disc-shaped base plate 2 is bent into a U-shape, and the resin lock support part 3, which is the tip of the bent part, is attached to the base plate 2. An annular groove 4 is formed between the substrate 2 and the resin lock support part 3, and a rib 5 is provided inside the annular groove 4 to maintain the width of the annular groove 4. Resin lock support parts 3 are provided at multiple locations in the direction, and on the inner peripheral edge of the board 2.
A wire insertion tube 6 is provided that protrudes in the opposite direction,
Wire harness 10 inserted into wire insertion tube 6
The tape 11 is wrapped around the wire insertion tube 6, and the wire harness 10 is fixed to the wire insertion tube 6 in a sealed state, as in the conventional case, and as shown in FIG. As shown, the hard resin lock 7 has a hollow disc-shaped upper wall 7a and an upper wall 7.
a lower wall 7b substantially parallel to a, an upper wall 7a and a lower wall 7b
It has a cylindrical portion 7c that connects the cylindrical portion 7c, and panel locking portions 8 cut and raised outward are provided at a plurality of locations on the cylindrical portion 7c as in the conventional case, but in the present invention, A groove-shaped engagement portion 13 having an opening 13a on the inner peripheral surface is formed on the upper wall 7a of the resin lock 7,
The base plate 2 of the grommet main body 1 is provided with a locking portion 12 that fits into the engaging portion 13, and the tip of the locking portion 12 is provided with a head portion for preventing slipping off having a width larger than the groove width of the engaging portion 13. 12a is provided.

The reason why the width of the head 12a is made larger than the groove width of the engaging portion 13 is to prevent the locking portion 12 from coming off from the engaging portion 13.

The operation of the grommet configured as above will be explained.

As shown in FIG. 3, the wire harness 10 inserted into the wire insertion tube 6 is wrapped together with the wire insertion tube 6 by 11 wraps of tape and fixed to the wire insertion tube 6 in a sealed state.

After inserting the grommet into the annular groove 4 of the grommet body 1 into the upper wall 7a of the resin lock 7, tilting the locking part 12 and engaging the locking part 13 through the opening 13a of the locking part 13, the panel locking part When the wire harness 8 is press-fitted into a through hole or the like of the panel, the annular protrusion 9 comes into close contact with the panel, the grommet is sealed to the panel, and the wire harness 10 routed through the panel is supported by the panel while being protected by the grommet.

Wire harness 10 supported by the panel
When the wire harness 10 is pulled by an external force in the direction of arrow A shown in FIG. The head 12a prevents the holder from coming out of the engaging portion 13.

In the above embodiment, the locking part 12 was provided on the base plate 2 of the grommet body 1, and the engaging part 13 was provided on the upper wall 7a of the resin lock 7. It is good also as a structure which provides the locking part 12 in the upper wall 7a of 7.

As described above, by engaging the engaging parts 13 with the engaging parts 13, elastic deformation of the substrate 2 is prevented and the width of the annular groove 4 is not expanded, so that the grommet body 1 subjected to external force is It will not come off the lock 7 (see Figure 4).

Therefore, grommet body 1, which was a problem in the past,
The fear of the lock falling off the resin lock 7 has been eliminated.

[Effect of idea]

Since the present invention is constructed as described above, even if an external force is applied to the wire harness to pull the grommet body, the grommet body will not fall off from the resin lock.

[Brief explanation of drawings]

1 to 4 show embodiments of the present invention.
The figure is a partial perspective view of the grommet body 1, Figure 2 is a plan view of the resin lock, Figure 3 is a vertical cross-sectional view of the grommet, Figure 4 is a vertical cross-sectional view of the grommet subjected to external force, and Figure 5 is a conventional grommet. Fig. 6 is a longitudinal sectional view of the conventional grommet, Fig. 7 is a partial perspective view of the main body of the grommet.
The figure is a longitudinal sectional view of a conventional grommet subjected to an external force. DESCRIPTION OF SYMBOLS 1... Grommet main body, 2... Board, 3... Resin lock support part, 4... Annular groove, 6... Electric wire insertion tube, 7... Resin lock, 8... Panel locking part, 10 ... Wire harness, 11 ... Tape, 12 ... Locking part, 12a ... Head, 13 ...
Engagement part.

Claims (1)

[Scope of utility model registration request] A hard resin lock 7 has a hollow disc-shaped upper wall 7a and a panel locking part 8 that fits into a hole in a panel, etc., and the upper wall 7 is attached to the outer peripheral edge of the hollow disc-shaped substrate 2.
In the grommet, the resin lock 7 is formed with a soft grommet main body 1 having an annular groove 4 into which the outer peripheral part of the grommet a is fitted, and a wire insertion tube 6 provided on the inner peripheral edge of the base plate 2. An engaging portion 13 is formed on the upper wall 7a, and the substrate 2 of the grommet main body 1
A grommet characterized in that a locking portion 12 that engages with the engaging portion 13 is provided.