JPH075224U - Grommet with holding plate - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the sealing performance by suppressing the deformation of the grommet body without lowering the workability of inserting the wire harness. A grommet body 10 having a flange portion 18 for joining a panel provided on the outer periphery of an opening edge portion of a wire harness insertion hole 16 and a grommet body 10 fitted on the outer periphery of the grommet body 10 and the flange portion 18 being attached to a panel P. In a grommet with a holding plate having a holding plate 30 that is sandwiched between the holding plate and the panel P and bolted and fixed to the panel P, an engaging means for mutually engaging the flange portion 18 and the holding plate is provided with the flange. with kicking set in the circumferential direction of the parts 18, the head of the bolt has a recess (bolt mounting portion) 40 in contact with the pressing plate 30.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a grommet with a holding plate.

[0002]

[Prior art]

 A grommet with a holding plate is a rubber grommet body with a flange part for joining the panel on the outer periphery of the opening edge of the wire harness insertion hole, and the holding plate fitted to the outer periphery of the grommet body is bolted to the panel. By doing so, the flange portion is clamped and fixed between the panel and the panel by the pressing plate. An example thereof is shown, for example, in Japanese Utility Model Publication No. 4-5078.

Further, Japanese Utility Model Laid-Open No. 1-124612 discloses a grommet as shown in FIGS. 7 and 8. In this grommet, a rib 5 for preventing deformation is provided on the inner wall of the linear portion 3 of the oval grommet body 1 which is easily deformed.

[0004]

[Problems to be solved by the device]

 To fix the former grommet with a holding plate to the panel, fit the grommet body into the opening of the holding plate while deforming the grommet body in advance, and then bolt the holding plate to the panel, but in the tightened state. The grommet body may remain deformed, or the deformation may increase as it is tightened, which makes it difficult to ensure sufficient sealing performance. In particular, in the case of an elliptical grommet, the linear portion is likely to be deformed, so that the problem is likely to occur. In addition, since the bolt tightening and fixing part is likely to receive a concentrated load, there is a problem that local deformation occurs and water easily enters from that part.

On the other hand, the latter grommet with ribs is effective in preventing deformation, but there is a problem that it is difficult to insert the wire harness because the ribs interfere.

In view of the above circumstances, an object of the present invention is to provide a grommet capable of suppressing deformation of the grommet body and improving sealing performance without lowering workability of inserting a wire harness. .

[0007]

[Means for Solving the Problems]

 According to a first aspect of the present invention, there is provided a grommet main body in which a flange portion for panel joining is provided on an outer periphery of an opening edge portion of the wire harness insertion hole, and a grommet main body fitted to the outer periphery of the grommet main body and the flange portion with a panel. In a grommet with a holding plate having a holding plate clamped between and clamped to a panel by bolting, engaging means for engaging the flange portion and the holding plate with each other is provided in the circumferential direction of the flange portion. At the same time, a bolt mounting portion with which the head portion of the bolt abuts is provided on the pressing plate.

According to a second aspect of the present invention, in the first aspect of the present invention, the opening of the wire harness insertion hole has a substantially oval shape, and at least one pair of the engaging means is provided at a position corresponding to the linear portion. It is characterized by that.

A third aspect of the present invention is characterized in that, in the first or second aspect of the invention, the bolt mounting portion with which the bolt head abuts has a concave shape and also serves as an engaging means. .

[0010]

[Action]

 In the grommet according to the first aspect of the invention, since the flange portion is restrained by the engaging means, the deformation is suppressed. Further, since the head portion of the bolt comes into contact with the bolt mounting portion formed on the holding plate, local deformation is less likely to occur.

According to the second aspect of the present invention, when the opening of the wire harness insertion hole has a substantially oval shape, the flange portion is deformed by providing at least one pair of engaging means at a position corresponding to the linear portion. Pressed.

According to the third aspect of the present invention, the head portion of the bolt is inserted into the bolt mounting portion having the concave shape, so that local deformation is less likely to occur.

[0013]

【Example】

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

FIG. 1 is a perspective view before assembling the grommet of the embodiment, FIG. 2 is a perspective view before assembling the grommet of the embodiment to a panel P, and FIG. 3 is a view taken along the line III-III of FIG. FIG. 4 is a sectional view taken along line IV of FIG. In these figures, 10 is a grommet main body formed of a soft elastic material such as rubber, and 30 is a frame-shaped holding plate formed by press-forming a metal plate.

The grommet body 10 is a tubular body composed of an enlarged diameter portion 12 and a reduced diameter portion 14, and has a wire harness insertion hole 16. The opening of the wire harness insertion hole 16 on the side of the expanded diameter portion 12 is formed to have a substantially oval cross section. A flange portion 18 is provided on the outer periphery of the opening edge portion of the wire harness insertion hole 16 on the side of the expanded diameter portion 12. The flange portion 18 has an outer peripheral shape in which a pair of elliptic curved portions project outward in a triangular shape, and a bolt through hole 20 is formed in each of the triangular projecting portions. Engaging frames (engaging means) 22 having slit-shaped rectangular holes 22a are formed on the outer peripheries of a pair of oval linear portions of the flange portion 18, respectively. Further, an annular recess 24 is formed at the boundary between the back surface of the flange portion 18 of the grommet body 10 and the outer circumference of the expanded diameter portion continuing to the flange portion 18.

On the other hand, the holding plate 30 has a base plate portion 32 having an outer peripheral shape that is the same as the outer peripheral shape of the flange portion 18, and a peripheral wall 34 provided on the outer peripheral edge of the base plate portion 32. An oval opening 36 is provided at the center of the base plate portion 32, and a standing wall 38 that fits into the annular recess 24 of the grommet body 10 is formed at the edge of the opening 36, as shown in FIG. . Further, a circular recess 40 into which the head of the bolt 70 is inserted is formed at a position corresponding to the bolt through hole 20 on the side of the grommet body 10 of the base plate portion 32. The recess 40 has a peripheral wall 40a and a bottom wall 40b. The peripheral wall 40a fits into the bolt through hole 20 of the grommet body 10 so that the bottom wall 40b is in close contact with the panel P. The height of the peripheral wall 34 is set smaller than the thickness of the flange portion 18 of the grommet body 10. Further, at a position corresponding to the engaging frame 22 on the grommet body 10 side of the peripheral wall 34, an engaging protrusion (engaging means) 42 fitted to the engaging frame 22 is formed by making notches 44 on both sides. Has been done.

Next, the operation will be described.

When this grommet is used, the wire harness W is first passed through the opening 36 of the pressing plate 30, and the wire harness W is passed through the grommet body 10 while the grommet main body 10 is further expanded. It is fixed to the main body 10. After that, the grommet body 10 is inserted into the opening 36 of the holding plate 30, and the grommet body 10 is fitted inside the peripheral wall 34 of the holding plate 30. At that time, the annular recess 24 of the grommet body 10 and the upright wall 38 are fitted together, and the peripheral wall 40a of the recess 40 of the holding plate 30 into which the head of the bolt 70 is inserted is inserted into the bolt through hole 18 of the grommet body 10. Mate. Further, the engaging projection 42 formed on the peripheral wall 34 of the holding plate 30 is fitted to the engaging frame 22.

In this state, the engaging projection 42 and the engaging frame 22, the bolt through hole 18 and the recess 40 respectively constitute engaging means, and restrain the grommet body 10 at four locations in the circumferential direction. ing. Therefore, especially when the linear portions are engaged, the grommet body 10 is not deformed and tightened when tightened. Further, since the recess 40 into which the head of the bolt 70 is inserted is provided, there is no local deformation and the sealing performance is improved. Moreover, since the outer peripheral portion of the grommet body 10 is constrained by the peripheral wall 34, the tightening force can be effectively converted into the contact pressure with the panel P, and the sealing pressure can be increased.

It should be noted that, although the opening shape on the side of the expanded diameter portion 12 has an oval shape in the above embodiment, it may have a circular shape. An example of a circular shape is shown in FIGS. In the case of the example shown in FIG. 5, a pair of bolt through holes 20, a recess (not shown), a pair of engagement frames 22 and engagement projections 42 are provided, but in the case of the example shown in FIG. A total of four bolt through holes 20 and recesses (not shown) are provided at equal intervals in the circumferential direction. Here, for convenience, elements having the same functions as those of the previous embodiment are designated by the same reference numerals.

Further, depending on the shape and size of the grommet body, the number of elements corresponding to these engaging means may be increased more than the above example.

[0022]

[Effect of device]

 As described above, according to the present invention, since the deformation of the grommet body is suppressed, sufficient sealing performance can be ensured. Further, since the rib for preventing deformation is not provided on the grommet body, the workability of inserting the wire harness is not deteriorated.

[Brief description of drawings]

FIG. 1 is a perspective view of a grommet according to an embodiment of the present invention before assembly.

FIG. 2 is a perspective view of a grommet according to an embodiment of the present invention before being attached to a panel.

FIG. 3 is a view taken along the line III-III in FIG.

FIG. 4 is a sectional view taken along the line IV of FIG.

FIG. 5 is a view similar to FIG. 3 of another embodiment of the present invention.

6 is a view similar to FIG. 3 of still another embodiment of the present invention.

FIG. 7 is a perspective view of a conventional example.

FIG. 8 is a plan view of a conventional example.

[Explanation of symbols]

 10 Grommet body 16 Wire harness insertion hole 18 Flange portion 20 Bolt through hole 22 Engaging frame 30 Holding plate 42 Engaging protrusion 40 Recess 70 Bolt P panel

Claims (3)

[Scope of utility model registration request] 1. A grommet body having a flange portion for panel joining provided on the outer periphery of an opening edge portion of a wire harness insertion hole, and a grommet body fitted to the outer periphery of the grommet body and between the flange portion and the panel. In a grommet with a holding plate having a holding plate clamped and bolted to the panel, with engaging means for mutually engaging the flange portion and the holding plate in the circumferential direction of the flange portion, A grommet with a holding plate, wherein a bolt mounting portion with which the head portion of the bolt abuts is provided on the holding plate. 2. The grommet with a holding plate according to claim 1, wherein an opening of the wire harness insertion hole has a substantially oval shape, and at least one pair of the engaging means is provided at a position corresponding to a linear portion thereof. 3. The grommet according to claim 1, wherein a bolt mounting portion with which the bolt head portion abuts has a recessed shape and also serves as the engaging means.