JP2001052553A - Grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the lateral slippage of a corrugated pipe, make fixing simple, and enhance fixing work efficiency of the corrugated pipe by forming a circular irregularities capable of engaging with a circular irregularities of the corrugated pipe on the inner circumferential surface of an insertion hole though which the corrugated pipe is inserted, formed in the inner circumferential part of a grommet body. SOLUTION: Circular irregularities are alternately, continuously formed on the outer circumferential part of a corrugated pipe and a wire harness can be inserted into the inner circumferential part. A grommet 13 has a grommet body 15 having an engaging groove 15a to be engaged with a fixing hole 14a formed in a car body panel 14 in the outer circumferential part. An insertion hole is formed in the inner circumferential part of the grommet body 15, and the corrugated pipe is inserted into the insertion hole. Circular protrusions and circular recesses are alternately, continuously formed on the inner circumferential surface of the insertion hole, and the circular recesses and circular protrusions of the corrugated pipe are engaged with the circular protrusions and the circular recesses of the inner circumferential surface of the insertion hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a grommet,
Specifically, when the corrugated pipe holding the wire harness is inserted into the mounting hole of the vehicle body panel, the mounting hole and the wire harness are prevented from coming into contact with each other, and water and the like enter the panel through the mounting hole. A grommet that can be prevented.

[0002]

2. Description of the Related Art Generally, when a grommet holding a wire harness is inserted into a mounting hole formed in a panel member that partitions the outside and the inside of a vehicle body, the mounting hole and the grommet are prevented from coming into contact with each other. Grommets are used to prevent the like from entering the inside of the panel (room) from the gap between the mounting hole and the corrugated pipe.

FIGS. 6A and 6B show a conventional grommet through which a corrugated pipe of this type is inserted. 6 (a) and 6 (b), reference numeral 1 denotes a corrugated pipe.
a and the annular convex portion 1b are formed alternately and continuously, and the wire harness 2 is inserted through the inner peripheral portion.

In FIG. 6B, reference numeral 3 denotes a grommet. The grommet 3 has a cylindrical shape having an annular groove 5a formed in an outer peripheral portion thereof so as to be fitted into a mounting hole 4a of a panel member 4 of a vehicle body. It comprises a large-diameter portion 5 and a small-diameter cylindrical portion 6 protruding from the large-diameter cylindrical portion 5 and through which the corrugated pipe 1 can be inserted.

[0005] The cylindrical small-diameter portion 6 is generally arranged on the outdoor side. By winding a tape 7 between the cylindrical small-diameter portion 6 and the corrugated tube 1, the corrugated tube 1 is fixed to the grommet 3. ing. Such a grommet 3
In this case, the wire harness 2 can be wired outside and inside the room through the panel member 3 while maintaining the corrugated tube 1 in a liquid-tight manner by being interposed between the corrugated tube 1 and the panel member 4. .

[0006]

However, in such a conventional grommet 3, the corrugated tube 1 is inserted through the small cylindrical portion 6 and the tape 7 is wound around the small cylindrical portion 6 and the corrugated tube 1. Therefore, there is a problem that the corrugated pipe 1 is easily shifted laterally with respect to the grommet 3, and the wire harness 2 is also shifted laterally via the corrugated pipe 1, so that the layout of the wire harness 2 is shifted.

In order to solve such a problem, a tape 7 wound around the cylindrical small diameter portion 6 and the corrugated tube 1 is required.
The number of turns of the corrugated pipe 1 may be increased, but in this case, the mounting work of the corrugated pipe 1 is troublesome and takes a long time, and the workability of the mounting work of the corrugated pipe 1 is deteriorated. Problems arise.

Accordingly, the present invention provides a grommet which can prevent the corrugated pipe from laterally displacing and can easily fix the corrugated pipe to improve the workability of the work of mounting the corrugated pipe. It is intended to provide.

[0009]

According to the first aspect of the present invention,
In order to solve the above-mentioned problem, a grommet to which a corrugated pipe having an annular concavo-convex portion continuously formed on an outer peripheral portion is attachable, and an engagement capable of engaging with a mounting hole formed in a panel member on an outer peripheral portion. A grommet main body having a groove, and an insertion hole formed in an inner peripheral portion of the grommet main body and through which the corrugated pipe can be inserted, the inner peripheral surface of the insertion hole being engaged with an annular uneven portion of the corrugated pipe. The present invention is characterized in that a possible annular uneven portion is formed.

In this case, when the corrugated pipe is inserted into the insertion hole of the grommet body, the annular unevenness formed on the inner peripheral surface of the insertion hole engages with the annular unevenness of the corrugated pipe. The lateral displacement with respect to the grommet main body can be reliably prevented. Further, since the corrugated pipe does not laterally displace with respect to the grommet main body, the work of tape-wrapping the corrugated pipe around the grommet main body can be reduced, and the workability of attaching the corrugated pipe to the grommet can be improved.

According to a second aspect of the present invention, in order to solve the above-mentioned problem, in the first aspect of the present invention, a tongue is provided on at least one surface of a grommet main body portion located at an opening end surface of the insertion hole, and It is characterized in that a tube can be tape-wrapped around the tongue.

In this case, since the corrugated pipe can be attached to the grommet body by tape-wrapping the corrugated pipe around the tongue, the corrugated pipe can be firmly fixed by the grommet.

According to a third aspect of the present invention, in order to solve the above-mentioned problem, in the first or second aspect of the present invention, the tongue has an uneven portion which can be engaged with the annular uneven portion of the corrugated tube. It is characterized by being formed.

In this case, the corrugated pipe can be tape-wound around the tongue, and at the same time, the corrugated pipe can be engaged with the annular unevenness formed on the surface of the tongue. Can be more reliably prevented from being laterally displaced.

[0015]

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

FIGS. 1 to 5 are views showing an embodiment of a grommet according to the present invention.

First, the configuration will be described. In FIG. 1, 11
Reference numeral denotes a corrugated pipe. The corrugated pipe 11 has annular concave portions 11a and annular convex portions 11b formed alternately and continuously on an outer peripheral portion, and a wire harness 12 can be inserted into an inner peripheral portion.

In FIGS. 2 and 3, reference numeral 13 denotes a grommet. The grommet 13 has an engagement groove 15a on its outer periphery which can be engaged with a mounting hole 14a formed in a vehicle body panel (panel member) 14. It has a main body 15. In addition,
The vehicle body panel 14 is provided at a portion that partitions the room and the outside.

An insertion hole 15b is formed in the inner peripheral portion of the grommet main body 15, and the corrugated pipe 11 is inserted into the insertion hole 15b. This insertion hole 15b
As shown in FIG. 4 (a), an annular convex portion 17a and an annular convex portion 17b are formed alternately and continuously on an inner peripheral surface of the corrugated tube 11a. The annular concave portion 11a and the annular convex portion 11b are engaged with each other.

The grommet body 15 has a pair of tongues 18.
The tongues 18a, 18b are located at the opening end faces of the insertion holes 15b, and the corrugated pipe 11 is fixed by a tape (not shown).

In the grommet 13 having such a configuration, the corrugated pipe 11 is inserted into the insertion hole 15b after the diameter expansion device (not shown) is inserted into the insertion hole 15b to expand the insertion hole 15b. The annular concave portion 11a and the annular convex portion 11b of the corrugated tube 11 are engaged with the annular convex portion 17a and the annular convex portion 17b (see FIG. 4B). Next, after removing the spreader from the insertion hole 15b, the corrugated pipe 11 is fixed to the tongues 18a and 18b by tape, and the corrugated pipe 11 is attached to the grommet 13. Next, the wire harness 12 is fixed to the vehicle body panel 14 via the corrugated pipe 11 and the grommet 13 by fitting the engagement groove 15a into the mounting hole 14a, and wiring is performed both indoors and outdoors.

As described above, in the present embodiment, the annular concave portion of the corrugated pipe 11 is formed on the inner peripheral surface of the insertion hole 15b of the grommet body 15.
Since the annular projection 17a and the annular projection 17b that can be engaged with the annular projection 11a and the annular projection 11b are formed, the lateral displacement of the corrugated tube 11 with respect to the grommet body 15 can be reliably prevented. In addition, the corrugated pipe 11 is
, The work of winding the corrugated pipe 11 around the grommet body 15 by tape can be reduced,
The workability of the work of attaching the corrugated pipe 11 to the grommet 13 can be improved.

Further, tongue portions 18a and 18b are provided on both sides of the grommet body 15 located at the opening end face of the insertion hole 15b, and the corrugated tube 11 is wound around the tongue portions 18a and 18b by tape. It can be fixed more firmly by the main body 15.

In the present embodiment, the tongue portions 18a and 18b are provided on both the open end surfaces of the grommet body 15, but may be provided only on one side.

Further, in the present embodiment, the surfaces of the tongues 18a, 18b are formed in a planar shape, but as shown in FIG. 5, the annular recesses 11a and 11b of the corrugated tube 11 are formed on the surfaces of the tongues 18a, 18b. Concavo-convex portions 19a and 19b which can be engaged with the annular convex portion 11b may be formed.

In this way, the corrugated tube 11 is connected to the tongue.
At the same time as the tape is wound around 18a, 18b, the tongues 18a, 18
Corrugated pipes are formed on the uneven portions 19a and 19b formed on the surface of
Since the annular concave portion 11a and the annular convex portion 11b can be engaged with each other, the lateral displacement of the corrugated pipe 11 with respect to the grommet 13 can be more reliably prevented.

[0027]

According to the first aspect of the present invention, when the corrugated pipe is inserted into the insertion hole of the grommet body, the annular unevenness formed on the inner peripheral surface of the insertion hole is formed in the annular unevenness of the corrugated pipe. Due to the engagement, the lateral displacement of the corrugated pipe with respect to the grommet body can be reliably prevented. Further, since the corrugated pipe does not laterally displace with respect to the grommet main body, the work of tape-wrapping the corrugated pipe around the grommet main body can be reduced, and the workability of attaching the corrugated pipe to the grommet can be improved.

According to the second aspect of the present invention, since the corrugated pipe can be attached to the grommet body by tape-wrapping the corrugated pipe around the tongue, the corrugated pipe can be firmly fixed by the grommet.

According to the third aspect of the present invention, the corrugated pipe can be tape-wound around the tongue, and at the same time, the annular unevenness of the corrugated pipe can be engaged with the unevenness formed on the surface of the tongue. Therefore, the lateral displacement of the corrugated pipe with respect to the grommet body can be more reliably prevented.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of a grommet according to the present invention, and is an external view of a corrugated pipe attached to the grommet.

FIG. 2 is a diagram illustrating a grommet and a vehicle body panel according to one embodiment.

FIG. 3A is a front view of a grommet of one embodiment,
(B) is its side view, (c) is its top view.

4A is a sectional view taken along the line AA of FIG. 3A,
(B) is a figure which shows the state which inserted the corrugated pipe into the insertion hole of the grommet main body.

FIG. 5 is a cross-sectional view of the grommet showing another shape of the tongue portion of the embodiment.

FIG. 6A is an external view of a corrugated pipe, and FIG. 6B is a view showing a state where the corrugated pipe is attached to a conventional grommet.

[Explanation of symbols]

 11 Corrugated pipe 11a Annular concave part 11b Annular convex part 13 Grommet 14 Body panel (panel member) 14a Mounting hole 15 Grommet body 15a Engaging groove 15b Insertion hole 17a Annular convex part 17b Annular concave part 18a, 18b Tongue part 19a, 19b Uneven part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takashi Suzuki 1-114 Nishisuehirocho, Yokkaichi-shi, Mie Sumitomo Wiring Systems, Ltd. (72) Inventor Takanori Ito 1-14 Nishisuehirocho, Yokkaichi-shi, Mie Sumitomo (72) Inventor Satoshi Amihiro 1-14 Nishisuehiro-cho, Yokkaichi-shi, Mie F-term (reference) 5G333 AA09 AB16 AB27 AB29 CB20 EA02

Claims (3)

[Claims] 1. A grommet to which a corrugated pipe having an annular concavo-convex portion formed continuously on an outer peripheral portion is attachable, and has an engaging groove on an outer peripheral portion engageable with a mounting hole formed in a panel member. A grommet main body, and an insertion hole formed in an inner peripheral portion of the grommet main body and through which the corrugated tube can be inserted, and an annular shape which can be engaged with an annular uneven portion of the corrugated tube on the inner peripheral surface of the insertion hole. A grommet characterized by forming irregularities. 2. A grommet according to claim 1, wherein a tongue is provided on at least one surface of a grommet body located at an opening end surface of said insertion hole, and said corrugated tube is tape-wound around said tongue. . 3. The grommet according to claim 1, wherein an uneven portion engageable with an annular uneven portion of the corrugated tube is formed on a surface of the tongue portion.