JP3660165B2 - Grommet - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a grommet, and more specifically, when a corrugated pipe holding a wire harness is inserted into an attachment hole of a vehicle body panel, the attachment hole and the wire harness are prevented from coming into contact with each other and water is passed into the panel through the attachment hole. It is related with the grommet which can prevent that etc. penetrate | invade.
[0002]
[Prior art]
In general, when a grommet holding a wire harness is inserted into a mounting hole formed in a panel member that divides the outside and inside of a vehicle body, the mounting hole and the grommet are prevented from contacting with each other, and water or the like is Grommets are used to prevent intrusion into the panel (inside the room) from the gap between the corrugated tubes.
[0003]
A conventional grommet through which this type of corrugated pipe is inserted is shown, for example, in FIGS. 6 (a) and 6 (b). 6 (a) and 6 (b), reference numeral 1 denotes a corrugated tube, and this corrugated tube 1 is formed with annular recesses 1a and annular projections 1b alternately and continuously on the outer periphery, and the wire harness 2 on the inner periphery. It is inserted.
[0004]
In FIG. 6B, reference numeral 3 denotes a grommet. The grommet 3 has a cylindrical large-diameter portion in which an annular groove 5a is formed in the outer peripheral portion to be fitted in the mounting hole 4a of the panel member 4 of the vehicle body. 5 and a cylindrical small-diameter portion 6 that protrudes from the cylindrical large-diameter portion 5 and into which the corrugated tube 1 can be inserted.
[0005]
The tubular small diameter portion 6 is generally disposed on the outdoor side, and the corrugated tube 1 is fixed to the grommet 3 by winding a tape 7 between the tubular small diameter portion 6 and the corrugated tube 1. In such a grommet 3, by interposing between the corrugated pipe 1 and the panel member 4, while holding the corrugated pipe 1 in a liquid-tight manner, the wire harness 2 is passed through the panel member 3 to the outside and the room. It can be wired.
[0006]
[Problems to be solved by the invention]
However, in such a conventional grommet 3, the corrugated pipe 1 is simply inserted through the cylindrical small diameter part 6 and the tape 7 is wound around the cylindrical small diameter part 6 and the corrugated pipe 1. There is a problem that the grommet 3 is easily displaced laterally, the wire harness 2 is also laterally displaced via the corrugated tube 1 and the layout of the wire harness 2 is displaced.
[0007]
In order to eliminate such a problem, the number of turns of the tape 7 wound around the cylindrical small-diameter portion 6 and the corrugated pipe 1 may be increased. The work is troublesome and takes a long time, and the workability of attaching the corrugated pipe 1 is deteriorated.
[0008]
Therefore, the present invention provides a grommet that can prevent the corrugated pipe from being laterally displaced and can improve the workability of the corrugated pipe mounting work by allowing the corrugated pipe to be easily fixed. The purpose is that.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention according to claim 1 is a grommet to which a corrugated pipe having an annular concavo-convex portion formed continuously on the outer peripheral portion can be attached, and the attachment formed on the panel member on the outer peripheral portion. A grommet body having an engaging groove engageable with the hole, and an insertion hole formed in the inner peripheral portion of the grommet body through which the corrugated pipe can be inserted,
The engagement groove is provided at a substantially central portion in the extending direction of the grommet body, and the corrugated pipe has an annular unevenness over the entire length of the inner peripheral surface of the insertion hole including the inner peripheral surface facing the engagement groove. An annular concavo-convex portion that can be engaged with the portion is formed.
[0010]
In that case, when the corrugated tube is inserted into the insertion hole of the grommet body, the annular uneven portion formed on the inner peripheral surface of the insertion hole engages with the annular uneven portion of the corrugated tube. On the other hand, it is possible to reliably prevent the lateral displacement. In addition, since the corrugated tube does not shift laterally with respect to the grommet main body, the work of tape winding the corrugated pipe around the grommet main body can be reduced, and the workability of the attaching operation for attaching the corrugated pipe to the grommet can be improved.
[0011]
In order to solve the above-mentioned problem, the invention according to claim 2 is characterized in that, in the invention according to claim 1, a tongue is provided on at least one surface of the grommet main body portion located on the opening end face of the insertion hole, It is characterized in that it can be taped around the tongue.
[0012]
In that case, since the corrugated tube can be attached to the grommet body by tape winding the corrugated tube around the tongue, the corrugated tube can be firmly fixed by the grommet.
[0013]
In order to solve the above-mentioned problem, the invention according to claim 3 is characterized in that in the invention according to claim 1 or 2, an uneven part that can be engaged with the annular uneven part of the corrugated tube is formed on the surface of the tongue part. It is characterized by.
[0014]
In that case, since the corrugated tube is taped around the tongue portion, and the corrugated tube can be engaged with the uneven portion formed on the surface of the tongue portion, the corrugated tube can be engaged with the grommet body. It is possible to prevent the lateral displacement more reliably.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
1-5 is a figure which shows one Embodiment of the grommet which concerns on this invention.
[0017]
First, the configuration will be described. In FIG. 1, reference numeral 11 denotes a corrugated tube. The corrugated tube 11 has annular recesses 11 a and annular projections 11 b formed alternately and continuously on the outer peripheral portion, and the wire harness 12 can be inserted into the inner peripheral portion. .
[0018]
2 and 3, reference numeral 13 denotes a grommet. The grommet 13 has a grommet body 15 having an engagement groove 15a that can be engaged with a mounting hole 14a formed in a vehicle body panel (panel member) 14 on the outer peripheral portion. Have. The engaging groove 15 a is provided at a substantially central portion in the extending direction of the grommet body 15 . Note that the vehicle body panel 14 is provided in a portion that partitions the room and the outdoors.
[0019]
An insertion hole 15b is formed in the inner peripheral portion of the grommet body 15, and the corrugated tube 11 is inserted into the insertion hole 15b. As the inner peripheral surface of the insertion hole 15b shown in FIG. 4 (a), over the entire length of the inner peripheral surface including the engaging groove 15 a portion opposite to, the annular projection 17a and the annular recess 17b alternately and are formed by a continuous, annular recess 11a and the annular convex portion 11b of the corrugated tube 11 is adapted to engage in the annular projection 17a and the annular concave portion 17b.
[0020]
The grommet body 15 is formed with a pair of tongues 18a and 18b. The tongues 18a and 18b are positioned on the opening end face of the insertion hole 15b so that the corrugated tube 11 is fixed by a tape (not shown). It has become.
[0021]
In the grommet 13 having such a configuration, a diameter expanding machine (not shown) is inserted into the insertion hole 15b to widen the insertion hole 15b, and then the corrugated tube 11 is inserted into the insertion hole 15b. to 17a and the annular concave portion 17b to engage the annular recess 11a and the annular convex portion 11b of the corrugated tube 11 (see Figure 4 (b)). Next, after the spreader is removed from the insertion hole 15 b, the corrugated tube 11 is fixed to the tongue portions 18 a and 18 b with a tape, and the corrugated tube 11 is attached to the grommet 13. Next, by fitting the engaging groove 15a into the mounting hole 14a, the wire harness 12 is fixed to the vehicle body panel 14 via the corrugated pipe 11 and the grommet 13, and wired inside and outside the room.
[0022]
Thus, since in the present embodiment, to form an annular recess 11a and engageable with the annular projection 11b annular protrusion 17a and the annular recessed portion 17b of the corrugated tube 11 on the inner peripheral surface of the insertion hole 15b of the grommet body 15, It is possible to reliably prevent the corrugated tube 11 from being laterally displaced with respect to the grommet body 15. In addition, since the corrugated tube 11 does not shift laterally with respect to the grommet body 15, the work of tape winding the corrugated tube 11 around the grommet body 15 can be reduced, and the workability of the mounting work for attaching the corrugated tube 11 to the grommet 13 is improved. Can be made.
[0023]
Further, since the tongue portions 18a and 18b are provided on both sides of the grommet main body 15 located on the opening end face of the insertion hole 15b and the corrugated tube 11 is taped around the tongue portions 18a and 18b, the corrugated tube 11 is It can be firmly fixed.
[0024]
In the present embodiment, the tongue portions 18a and 18b are provided on both of the opening end faces of the grommet body 15, but may be provided only on one side.
[0025]
Further, in the present embodiment, the surfaces of the tongue portions 18a and 18b are formed in a planar shape. However, as shown in FIG. 5, the annular recess 11a and the annular protrusion of the corrugated tube 11 are formed on the surfaces of the tongue portions 18a and 18b. Concave and convex portions 19a and 19b that can be engaged with 11b may be formed.
[0026]
In this way, the corrugated tube 11 is taped around the tongues 18a and 18b, and at the same time, the concave and convex portions 19a and 19b formed on the surfaces of the tongues 18a and 18b Since the portion 11b can be engaged, it is possible to more reliably prevent the corrugated pipe 11 from being laterally displaced with respect to the grommet 13.
[0027]
【The invention's effect】
According to the first aspect of the present invention, when the corrugated tube is inserted into the insertion hole of the grommet body, the annular uneven portion formed on the inner peripheral surface of the insertion hole is engaged with the annular uneven portion of the corrugated pipe. Thus, it is possible to reliably prevent the corrugated tube from shifting laterally with respect to the grommet body. In addition, since the corrugated tube does not shift laterally with respect to the grommet main body, the work of tape winding the corrugated pipe around the grommet main body can be reduced, and the workability of the attaching operation for attaching the corrugated pipe to the grommet can be improved.
[0028]
According to invention of Claim 2, since a corrugated pipe | tube can be attached to a grommet main body by tape-wrapping a corrugated pipe | tube on a tongue part, a corrugated pipe | tube can be firmly fixed with a grommet.
[0029]
According to the invention described in claim 3, since the corrugated tube is taped around the tongue, and simultaneously, the corrugated tube can be engaged with the corrugated portion formed on the surface of the tongue. It is possible to more reliably prevent the tube from shifting laterally with respect to the grommet body.
[Brief description of the drawings]
FIG. 1 is a view showing an 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 view showing a grommet and a vehicle body panel according to an embodiment.
3A is a front view of a grommet according to an embodiment, FIG. 3B is a side view thereof, and FIG. 3C is a top view thereof.
4A is a cross-sectional view taken along the line AA in FIG. 3A, and FIG. 4B is a diagram illustrating a state in which a corrugated tube is inserted through an insertion hole of the grommet body.
FIG. 5 is a cross-sectional view of a grommet showing another shape of a tongue portion according to one embodiment.
6A is an external view of a corrugated pipe, and FIG. 6B is a view showing a state in which the corrugated pipe is attached to a conventional grommet.
[Explanation of symbols]
11 Corrugated tube
11a Annular recess
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 recess
18a, 18b Tongue
19a, 19b Uneven portion

Claims (3)

A grommet to which a corrugated tube in which an annular concavo-convex part is continuously formed on the outer periphery can be attached
A grommet body having an engaging groove engageable with an attachment hole formed in the panel member on the outer peripheral portion, and an insertion hole formed in the inner peripheral portion of the grommet main body through which the corrugated tube can be inserted;
The engagement groove is provided at a substantially central portion in the extending direction of the grommet body, and the corrugated pipe has an annular unevenness over the entire length of the inner peripheral surface of the insertion hole including the inner peripheral surface facing the engagement groove. A grommet characterized in that an annular concavo-convex portion engageable with the portion is formed.   The grommet according to claim 1, wherein a tongue is provided on at least one surface of a grommet main body portion located on the opening end face of the insertion hole, and the corrugated tube can be wound around the tongue by tape.   The grommet according to claim 1, wherein a concavo-convex portion engageable with the annular concavo-convex portion of the corrugated tube is formed on a surface of the tongue portion.

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