JPH0729717U - Grommet - Google Patents

Abstract

(57) [Summary] [Purpose] Providing grommets with excellent waterproofness and sound insulation. [Structure] A large diameter portion (2) and a wire holding small diameter portion (3) are continuously and integrally formed in the longitudinal direction, and a grommet body (1) made of soft rubber or the like is formed on the outer peripheral surface of the tip of the large diameter portion (2). A collar-shaped seal portion (5) that closely adheres to the panel (A), and a collar-shaped sound insulation that closely adheres to the surface of the sound insulation sheet (B) attached to the vehicle panel (A) on the outer peripheral surface of the tip of the seal portion (5). Division (7)
To form a grommet.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a grommet used for internal wiring of an automobile.

[0002]

[Prior art]

 Conventionally, as shown in FIG. 3, a grommet used for internal wiring of an automobile has a large-diameter portion 21 provided with a flange-shaped seal portion 22 on the outer peripheral surface of the tip and a small-diameter portion 23 of the wire retainer, which are continuously integrated in the longitudinal direction. The grommet body 20 is made of soft rubber or the like and has a wire harness insertion hole 24 formed in the axis thereof. The sealing portion 22 of the grommet body 20 is provided with a locking leg 26 having a locking claw 27 at its tip. By fitting the inner 25 and locking the locking claw 27 formed at the tip of the locking leg 26 provided on the inner 25 at the edge of the grommet fitting hole a drilled in the vehicle panel A, The seal portion 22 is configured to be in close contact with the vehicle panel A to ensure waterproofness. Further, as a means for preventing noise such as engine sound from leaking into the vehicle interior, a sound insulation sheet B made of sponge or the like is attached to the vehicle panel A to ensure sound insulation.

[0003]

[Problems to be solved by the device]

 In the grommet configured as described above, the seal portion 22 formed on the grommet body 20 is in close contact with the vehicle panel A, so that the waterproof property is ensured. However, in order to bring the seal portion 22 formed on the grommet body 20 into close contact with the vehicle panel A, the sound insulation sheet B attached to the vehicle panel A is provided with a hole b having a diameter larger than the outer diameter of the seal portion 22. Since it has to be bored, a gap is created between the inner peripheral surface of the hole b bored in the sound insulation sheet B and the outer peripheral surface of the seal portion 22 formed in the grommet body 20. There was a problem that noise leaked into the passenger compartment and the sound insulation effect was impaired.

The present invention has been made in view of the above problems, and an object thereof is to provide a grommet having excellent waterproofness and sound insulation.

[0005]

[Means for Solving the Problems]

 The present invention is a grommet in which a large-diameter portion having a flange-shaped seal portion on the outer peripheral surface of the tip and a small-diameter portion of an electric wire retainer are integrally formed in the longitudinal direction, and an inner portion having a locking claw is fitted to the seal portion. A grommet is formed by providing a flange-shaped sound insulation portion on the outer peripheral surface of the tip of the seal portion, thereby solving the conventional problems.

[0006]

[Action]

 Insert the grommet from the small diameter part into the grommet fitting hole drilled in the vehicle panel, and lock the locking claw provided on the inner with the hole edge of the grommet fitting hole. By locking the locking claws to the edge of the grommet fitting hole, the seal part is in close contact with the vehicle panel to ensure waterproofness, and at the same time, the flange-shaped sound insulation part provided on the outer peripheral surface of the tip of the seal part is used on the vehicle. The sound insulation is secured by closely contacting the surface of the sound insulation sheet attached to the panel.

[0007]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention. In FIG. 1, 1 is a large diameter portion 2 and a wire holding small diameter portion 3 which are continuously and integrally formed in the longitudinal direction, and a wire harness insertion hole 4 is formed in an axial center. A grommet main body 5 made of perforated soft rubber or the like is a collar-shaped seal portion provided on the outer peripheral surface of the distal end of the large diameter portion 2, and a collar portion 11 of an inner 10 to be described later is fitted to the seal portion 5. An annular inner fitting groove 6 for wearing is provided. Reference numeral 7 is a collar-shaped sound insulation portion provided on the outer peripheral surface of the tip of the seal portion 5.

Reference numeral 10 denotes an inner made of hard plastic or the like, 11 denotes a collar portion forming the inner 10, 12 denotes a plurality of locking legs standing on the collar portion 11, and 13 denotes a tip of the locking leg 12. The locking claws 13 a formed are taper surfaces formed on the tips of the locking claws 13 and inclined outward. The inner portion 10 is attached to the seal portion 5 by fitting the flange portion 11 into the inner fitting groove 6 formed in the seal portion 5 of the grommet body 1.

To attach the grommet of the present invention constructed as described above to a vehicle panel, the wire harness W is inserted into the wire harness insertion hole 4 formed in the shaft center of the grommet body 1 as shown in FIG. , The wire holding small-diameter portion 3 and the wire harness W are tape-wrapped and fixed. Next, the wire harness W and the wire holding small-diameter portion 3 are sequentially inserted into the grommet fitting holes a formed in the vehicle panel A, and the locking claw 13 provided at the tip of the locking leg 12 of the inner 10 is mounted on the vehicle panel A. The grommet fitting hole a formed in the hole is engaged with the hole edge. At this time, the locking leg 12 once bends inward, and when the locking claw 13 comes out of the grommet fitting hole a, the locking leg 12 returns to its original state due to its repulsive spring force, and the locking claw 13 Engages with the hole edge of the grommet fitting hole a. When the locking claw 13 is locked to the hole edge of the grommet fitting hole a, the flange-shaped seal portion 5 formed on the grommet main body 1 comes into close contact with the vehicle panel A and is provided on the outer peripheral surface of the tip of the seal portion 5. The brim-shaped sound insulation portion 7 is in close contact with the surface of the sound insulation sheet B made of sponge or the like attached to the vehicle panel A, and the grommet is fixed to the vehicle panel.

As described above, by locking the locking claw 13 provided at the tip of the locking leg 12 of the inner 10 to the hole edge of the grommet fitting hole a formed in the vehicle panel A, the grommet. The collar-shaped seal portion 5 formed on the main body 1 is in close contact with the vehicle panel A, and at the same time, the collar-shaped sound insulating portion 7 provided on the outer peripheral surface of the tip of the seal portion 5 is a sound insulating sheet made of sponge or the like attached to the vehicle panel A. Since it is in close contact with the surface of B, it is not only waterproof but also excellent in sound insulation and can effectively prevent noise such as engine noise from leaking into the vehicle interior.

[0011]

[Effect of device]

 According to the present invention, as described above, there is an excellent effect that it is possible to provide a grommet excellent in waterproof property and sound insulation property.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a usage state.

FIG. 3 is a vertical cross-sectional view showing a usage state of a conventional grommet.

[Explanation of symbols]

1 Grommet body 2 Large diameter part 3 Small diameter part 5 Seal part 7 Collar-shaped sound insulation part 10 Inner 13 Locking claw

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takahiro Furuno 380 Takanose, Toyosato-cho, Inoue-gun, Shiga Prefecture Omi Electric Cable Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A grommet in which a large-diameter portion having a brim-shaped seal portion on the outer peripheral surface of the tip and a small-diameter portion of an electric wire retainer are continuously and integrally formed in the longitudinal direction, and an inner member having a locking claw is fitted to the seal portion. In the grommet, the grommet is provided with a collar-shaped sound insulation part on the outer peripheral surface of the tip of the seal part.