JPH0583949U - Grommet for wire harness - Google Patents

Abstract

(57) [Summary] [Purpose] In the wire harness grommet, the work of inserting the wire harness is facilitated, and separate steps such as bonding and tape winding are not required. [Structure] The grommet 10 is cut in the axial direction, and engaging recesses 14a and engaging protrusions 13b are formed on the facing surfaces 10f and 10g of the cutting portion 10e to form the facing surface 10 of the cutting portion 10e.
Wire harness 1 from the radial direction by pushing f and 10g apart
1 is inserted into the insertion hole 10c. After the insertion of the wire harness 11, when the facing surfaces 10f and 10g of the cutting portion 10e are joined, the engaging concave portion 14a and the engaging convex portion 13b are engaged with each other to close both facing surfaces 10f and 10g.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a grommet for a wire harness, and more specifically, when a wire harness is inserted into a through hole formed in a vehicle body panel of an automobile or the like, the grommet is interposed between the panel and the wire harness for sealing. In particular, the wire harness can be easily inserted into the wire harness insertion hole provided in the grommet.

[0002]

[Prior Art]

 Conventionally, this type of grommet has been made by molding and vulcanizing elastic rubber material, etc., and has a vehicle body locking part consisting of a large-diameter flange part at one end and a wire from the center hole of the vehicle body locking part. A tubular portion for inserting the harness is provided in a protruding manner, and the wire harness is passed through the hollow portion of the tubular portion, that is, the wire harness insertion hole.

[0003]

[Problems to be solved by the device]

 The wire harness insertion hole (hereinafter abbreviated as insertion hole) is set to be smaller than the outer diameter of the wire harness to be inserted in order to ensure the sealing property. Therefore, when inserting the wire harness through the insertion hole of the grommet, it is necessary to insert the wire harness through the insertion hole from the axial direction in a state where the insertion hole is expanded by a dedicated spreader.

As described above, in order to insert the wire harness, a spreader is required, and there is a drawback that the wire harness cannot be easily inserted. In addition, there was a problem that the position of the grommet could not be easily adjusted after the grommet was attached to the wire harness, so that the position of the grommet attachment position could not be easily adjusted. Similarly, once the grommet was once attached to the wire harness, the wire harness could not be easily taken out, so it was almost impossible to remove the grommet from the wire harness and reuse it.

It has been attempted to cut the grommet in the axial direction and spread the facing surface of the cut portion to insert the wire harness through the insertion hole in the radial direction. However, there are drawbacks such as the need for a separate process such as bonding with an adhesive or winding a tape around the outer peripheral surface of the grommet to close both facing surfaces, and the sealing tends to be incomplete.

Therefore, an object of the present invention is to make it possible to easily insert a wire harness into a grommet without using a spreader and to easily adjust a mounting position of the grommet with respect to a wire harness. In addition, the wire harness can be easily removed from the wire harness and can be reused. Moreover, the adhesive does not require a separate process such as tape winding, and the sealability with the wire harness can be improved. It is intended to provide grommets.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention has a panel locking part consisting of a large-diameter flange part that locks in the locking hole of the panel at one end, and protrudes from the outer periphery of the center hole of the panel locking part. In a grommet in which a tubular part for inserting a wire harness is integrally molded, it is possible to cut along the axial direction from the tip of the grommet's tubular part to the tip of the panel locking part, and to open the grommet to both sides from the cutting part. A wire harness, characterized in that an engaging concave portion and an engaging convex portion which can be engaged with each other when the opposing surfaces are joined are formed on the opposing surface of the cutting portion. It provides grommets.

It is preferable that a seal portion is formed on the facing surface of the cut portion so as to be in close contact with each other when the facing surfaces are joined together.

[0009]

[Action]

 According to the grommet of the present invention, the grommet is cut in the axial direction, and the engaging concave portion and the engaging convex portion are formed on the facing surface of the cutting portion. Therefore, the opposing surface of the cut portion can be pushed wide to easily insert the wire harness in the insertion hole in the radial direction. After the wire harness is inserted, when the facing surfaces of the cutting portion are joined, the engaging concave portion and the engaging convex portion engage with each other, and both opposing surfaces are closed. In addition, when the seal portions are formed on both facing surfaces, the sealing property between the facing surfaces is improved. In this way, the facing surface of the cut portion can be closed by one touch, and separate steps such as bonding and tape winding become unnecessary.

[0010]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. As shown in FIGS. 1 and 2, the grommet 10 is made of an elastic elastomer, and has a large-diameter flange portion 10a serving as a locking portion to the vehicle body panel and a small-diameter cylindrical portion 10b serving as a wire harness insertion portion. The cylindrical portion 10b is provided with an insertion hole 10c for the wire harness 11.

An annular groove 10 d is formed on the outer peripheral surface of the flange 10 a, and the groove 10 d is locked in a locking hole 12 a formed in the panel 12 to attach the grommet 10 to the panel 12. Be done.

In the grommet 10, the outer peripheral surface and the inner peripheral surface are cut along the axial direction from the tip of the flange portion 10a to the tip of the cylindrical portion 10b. In order to form the facing surfaces 10f and 10g of the cut portion 10e to have a predetermined wide width, rising portions 10h and 10h protruding outward are provided on a part of the flange portion 10a and the cylindrical portion 10b, respectively. ..

As shown in FIGS. 3 and 6, on one side of the facing surfaces 10f and 10g, for example, the facing surface 10f, engaging projections 13b having large diameter heads 13a are provided at regular intervals (for example, about 5 mm). The first lock plate 13 made of synthetic resin or rubber, which is formed in large numbers, is insert-molded.

As shown in FIGS. 3 and 7, the opposite surface 10g on the other side is provided with engaging holes 14a into which the large diameter heads 13a of the engaging protrusions 13b can be engaged. A second lock plate 14 made of synthetic resin or rubber formed corresponding to the protrusion 13b is insert-molded.

As shown in FIG. 4, the lock plates 13 and 14 have lap step portions 13 c and 14 c with the grommet 10, respectively, at their end portions so as not to come off from the facing surfaces 10 f and 10 g of the grommet 10. Has been formed.

As shown in FIGS. 3 to 5, small protrusion-shaped seal portions 10i and 10i are annularly formed on the outer peripheral surfaces of the facing surfaces 10f and 10g, respectively.

With the above configuration, when the facing surfaces 10f and 10g of the cutting portion 10e of the grommet 10 are pushed outward in the circumferential direction, the wire harness 11 can be inserted into the insertion hole 10c from the radial direction, which facilitates the insertion work. You can do it.

After the wire harness 11 is inserted, when the facing surfaces 10 f and 10 g of the cutting portion 10 e are pressed and joined together, the engaging protrusion 13 b of the first lock plate 13 is engaged with the engaging hole 14 a of the second lock plate 14. , And the opposite surfaces 10f and 10g are closed so as not to separate from each other. At this time, since the seal portions 10i of the opposing surfaces 10f and 10g are in close contact with each other, the sealing property between the opposing surfaces 10f and 10g is improved.

After that, the recessed groove portion 10 d of the flange portion 10 a of the grommet 10 is locked in the locking hole 12 a of the panel 12, and the grommet 10 is attached to the panel 12.

As described above, since the facing surfaces 10f and 10g of the cutting portion 10e of the grommet 10 can be closed by one-touch and simultaneously sealed, the conventional bonding and tape winding steps as described above are not required, and the production is not required. The cost can be reduced. The grommet 10 of the present invention is also suitable for a small grommet made of a material that does not easily expand the insertion hole as in the conventional case.

[0021]

[Effect of the device]

 As is clear from the above description, the grommet of the present invention is obtained by cutting the grommet in the axial direction and forming the engaging concave portion and the engaging convex portion on the facing surface of the cutting portion. Therefore, it is possible to push the facing surface of the cut portion apart and easily insert the wire harness into the insertion hole in the radial direction. After the insertion of the wire harness, when the facing surfaces of the cut portion are joined together, the engaging concave portion and the engaging convex portion engage with each other, and both opposing surfaces are closed. In addition, when the seal portions are formed on both facing surfaces, the sealing property between the facing surfaces is improved. In this way, the facing surface of the cut portion can be closed with one touch, and separate steps such as bonding and tape winding are unnecessary.

[Brief description of drawings]

FIG. 1 is a perspective view of a grommet of the present invention.

FIG. 2 is a cross-sectional view of FIG.

FIG. 3 is a front view of a main part of FIG.

FIG. 4 is a front view of relevant parts when the lock plate of FIG. 3 is engaged.

FIG. 5 is an enlarged view of a seal portion.

FIG. 6 is a front view and a side view of a first lock plate.

FIG. 7 is a front view and a side view of a second lock plate.

[Explanation of symbols]

 10 Grommet 10c Insertion hole 10e Cutting part 10f Opposing surface 10g Opposing surface 10i Seal part 11 Wire harness 12 Panel 12a Locking hole 13 First lock plate 13b Engagement protrusion 14 Second lock plate 14a Engagement hole

Claims (2)

[Scope of utility model registration request] 1. A tubular portion for inserting a wire harness, which has a panel locking portion made of a large-diameter flange portion that locks in a locking hole of the panel at one end, and which projects from the outer periphery of the center hole of the panel locking portion. A grommet formed integrally with the grommet, the grommet being cut along the axial direction from the tubular end of the grommet to the tip of the panel locking part, and the grommet can be opened to both sides from the cutting part. A grommet for a wire harness, characterized in that an engaging concave portion and an engaging convex portion which are engageable with each other when the opposing surfaces are joined are formed on the opposing surfaces of the cutting portion. 2. The grommet for a wire harness according to claim 1, wherein a seal portion is formed on the facing surface of the cut portion so as to be in close contact with each other when the facing surfaces are joined together.