JP3004884B2 - Grommet fixture - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grommet fixing device for protecting a grommet for protecting, for example, a bundle of wires inserted therein and for sealing the inside and outside of a panel.

[0002]

2. Description of the Related Art Grommets made of ordinary elastic materials are:
Attached to a panel of an automobile or the like, the wire bundle disposed inside and outside of the panel is prevented from being damaged, and sealability between inside and outside of the panel is secured. When fixing the grommet to the panel, a split-type bracket is used because of the advantage that the wire bundle can be easily incorporated, and Japanese Utility Model Laid-Open No. 50628/1993 discloses this type of wire harness grommet.

As shown in a perspective view of FIG. 8, this wire harness grommet has a cylindrical portion 1a through which a wire bundle W is inserted.
A grommet body 1 made of an elastic material such as rubber,
a, 3a and flanges 2b, 3b, respectively, which are combined with the grommet body 1 and are fixed to the panel by metal. Are formed with cutout openings 4 and 5, respectively, for inserting a bundle of electric wires. On one bracket 2, a guide groove 6 is provided on the opening side of the semi-annular cylindrical portion 2 a, and a guide rib 7 is provided on an edge of the notch opening 4. The other bracket 3 is provided with an engagement rib 8 for engaging with the guide groove 6 on the opening side of the semi-annular cylindrical portion 3a,
An engagement groove 9 for engaging with the guide rib 7 is provided in the flange portion 3b.

When such a wire harness grommet is fixed to a panel, after the bracket 3 is attached to the grommet body 1, the guide groove 6, the guide rib 7 of the bracket 2 and the engaging rib 8 and the engaging groove 9 of the bracket 3 are provided. Respectively, to attach the bracket 2 to the bracket 3 and fix them to the panel by bolts.

[0005]

However, in the above-described conventional example, the number of parts increases because the brackets 2 and 3 have different shapes, and the brackets 2 and 3 have semicircular cylindrical portions 2a, There is a problem that space is required because the 3a is provided.

When the brackets 2 and 3 are mounted on the grommet body 1, the guide grooves 6, the guide ribs 7 and the engagement ribs 8 and 9 must be engaged with each other.
There is also a problem that mounting work becomes complicated.

An object of the present invention is to solve the above-mentioned problems and to provide a simple grommet fixture that can be easily mounted on a grommet.

[0008]

A grommet fixture according to the present invention for achieving the above object has a tubular portion fitted into a fitting hole of a panel, and is provided on the outer periphery of the tubular portion. A grommet fixing tool for fixing a grommet body having a flange portion joined to the panel to the panel by using bolts, wherein the grommet body is a substantially flat plate-like and substantially C-shaped member made of a hard material that fits outside the flange portion of the grommet body. The two bracket segments have the same shape, and have two ends overlapping each other. One end has an insertion hole through which the bolt is inserted, and one engagement portion of the lock mechanism. The other end is provided with a notch groove that opens to the insertion hole of the other bracket segment and the other engaging portion that engages with the one engaging portion of the other bracket segment. Provided, both Part superimposed engaged with the engaging portions in, characterized in that fixed to the panel by tightening the bolts inserted into the insertion hole and the notch groove of the bracket component body locked.

[0009]

In the grommet fixture having the above-described structure, 2
When the bracket segments are externally fitted to the flange portion of the grommet body and both ends are overlapped, the engaging portions are engaged with each other and the bracket segments are locked in a substantially annular shape. When the bolt inserted into the insertion hole and the cutout groove of the locked bracket segment is tightened, the bracket segment presses the grommet body against the panel.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS. 1 is a plan view of this embodiment, FIG. 2 is a side view, FIG. 3 is a sectional view, and FIG. 4 is an enlarged sectional view of a main part.
Two bracket segments 12, 12 which are locked to each other and form an annular shape are fitted on the outer periphery of the grommet body 11, and these bracket segments 12, 12 are connected to the grommet body 11
At the same time, it is fixed to the panel 14 by fixing screws 13, 13.

The grommet body 11 is formed from an elastic material such as rubber into a cylindrical shape having an inside as a wire bundle insertion hole 11a.
For example, an elliptical fitting cylindrical portion 21 fitted into the fitting hole 14 a of the panel 14, an elliptical cone-shaped conical cylindrical portion 22 connected to the fitting cylindrical portion 21, and a top portion of the conical cylindrical portion 22. A connecting small-diameter cylindrical portion 23 is provided. The fitting tube portion 21 has an outer diameter fitted into the fitting hole 14a of the panel 14, and a stepped flange portion 24 having a small diameter portion 24a and a large diameter portion 24b is provided on the outer periphery of the fitting tube portion 21. Is provided.

On the other hand, as shown in FIG. 5, the two bracket segments 12, 12 have substantially the same shape of a substantially flat plate and a substantially C-shape.
As shown in FIG. 1, the grommet is formed in an annular shape, is fitted on the outer periphery of the fitting tube portion 21 of the grommet body 11, and is locked by the flange portion 24. A peripheral protruding piece 32 is formed on the peripheral edge of the main body portion 31 of the bracket segments 12, 12 so as to cover the outer peripheral surface of the small diameter portion 24 a of the flange portion 24 of the grommet main body 11. Also, the small diameter portion 24a
Lock grooves 25a, 25b are formed at the base of the bracket, and the inward locking pieces 33 of the bracket segment 12 are press-fitted into these lock grooves 25a, 25b.

The above-mentioned inward locking piece 33 projects from the center of the inner peripheral edge of the main body 31 of the two bracket segments 12, 12. Outward locking pieces 34a, 34b that lock to the portion 24b are protrudingly provided. In addition, one end of the main body 31 is slightly raised toward the opposite side of the panel 14 via the step portion 35.
It has been. A fixing screw 13 including a screw head 13a and a screw shaft 13b is fixed to the first end 36,
A locking projection 37 is provided so as to project toward the panel 14, that is, toward the back side of the paper surface, and a notch 38 is formed at one end of the peripheral projection 32. The fixing screws 13 are fixed to the bracket segments 12 in advance.

On the other hand, the other end of the main body 31 forms a second end 39 which cooperates with the first end 36 of the other bracket segment 12 to form a locking mechanism. In this second end 39,
A clamping piece 4 for clamping the inner edge 36a of the first end 36
0 is folded from the inside edge side. Also, the second end 3
9, a notch groove 41 into which the screw shaft 13b of the fixing screw 13 is fitted, a locking hole 42 into which the locking projection 37 is fitted, and a notch 43 at the other end of the peripheral protruding piece 32 are formed. I have.

Further, these bracket segments 12, 12
Is locked to the grommet body 11 through which the wire bundle is inserted, first, the individual bracket segments 12 are abutted so as to sandwich the outside of the flange portion 24 of the grommet body 11,
Each first end 36 and the second end 39 are overlapped,
The screw shaft 13 b of the fixing screw 13 is fitted into the notch groove 41 on the other side, and the inner edge 36 a is pressed into the lower surface of the sandwiching piece 40 on the other side. As a result, the locking projections 37 are fitted into the locking holes 42 on the mating side, and the bracket segments 12, 12
Lock each other.

Next, as shown in the rear view of FIG. 6, the screw shaft 13b of the fixing screw 13 is inserted into the screw holes 26a, 26b formed in the flange portion 24 of the grommet main body 11, respectively. As shown in (1), the inward locking pieces 33 of the bracket segments 12, 12 are pressed into the locking grooves 25a, 25b of the grommet body 11. The outward locking piece 34
a and 34b are respectively locked in locking holes 27a to 27d formed in the large diameter portion 24b of the flange portion 24. Thereby, as shown in FIG. 7, the bracket segment 12 is locked to the grommet main body 11, and the screw shaft 13 b of the fixing screw 13 projects from the flange portion 24 of the grommet main body 11.

When attaching the bracket segments 12, 12 locked to the grommet body 11 to the panel 14, the screw shaft 1 of the fixing screw 13 is used as shown in FIGS.
3b is inserted into a screw hole (not shown) of the panel 14, the fitting cylindrical portion 21 of the grommet body 11 is pushed into the fitting hole 14a of the panel 14, and the nut 15 is further screwed into the screw shaft 13.
b. As a result, the fitting tubular portion 21 of the grommet main body 11 is restored, and the flange portion 24 of the grommet main body 11 is compressed between the bracket segments 12, 12 fastened by the fixing screw 13 and the panel 14.

In this embodiment, since the flange portion 24 of the grommet main body 11 is pressed against the panel 14 by the fixing screw 13 via the bracket segments 12, 12, the sealing performance between the grommet main body 11 and the panel 14 is improved. In addition to the above, even when the grommet body 11 is pulled together with the wire bundle and the small-diameter cylindrical portion 23 or the conical cylindrical portion 22 is deformed,
The fitting tube portion 21 is not deformed, can maintain the sealing property between the inside and outside of the panel 14, and can prevent the grommet body 11 from vibrating even when the wire bundle vibrates.
4. Noise inside and outside can be prevented.

Further, since the two bracket segments 12, 12 are configured to be locked by simply pushing them in facing each other, each bracket segment 12 can be easily mounted on the grommet body 11. Since the number of parts is reduced, the manufacturing cost can be reduced.

The fixing screw 13 is used for the bracket segment 12.
Although it is fixed to the panel 14 in advance, a separate member may be used when fixing to the panel 14 without fixing.

[0021]

As described above, the grommet fixing device according to the present invention is provided with two grommets on the outside of the flange portion of the grommet body.
Since the bracket segments are externally fitted, the ends are overlapped and the engaging portions are engaged with each other, the bracket segments can be easily mounted on the grommet body. In addition, since two substantially flat plate-shaped brackets having the same shape are used, the types of parts,
Management costs, manufacturing costs, installation space, etc. can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment.

FIG. 2 is a side view.

FIG. 3 is a sectional view.

FIG. 4 is an enlarged sectional view of a main part.

FIG. 5 is a plan view of the bracket segment disposed so as to face each other.

FIG. 6 is a rear view of the grommet body in a state where a bracket segment is locked.

FIG. 7 is a plan view.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Grommet main body 12 Bracket divided body 13 Fixing screw 14 Panel 21 Fitting cylinder part 22 Conical cylinder part 23 Small diameter cylinder part 24 Stepped flange part 31 Body part 32 Peripheral edge piece 36 First end 37 Locking projection 39 Second end Part 40 Nipping piece 41 Notch groove 42 Lock hole

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Satoshi Kukai 1-8-1, Kotake-cho, Nerima-ku, Tokyo Inside Ryosei Denso Co., Ltd. (56) References JP-A-7-249337 (JP, A) 6-5047 Kai (JP, U) 5-87755 JP (JP, U) 5-50628 JP (JP, U) 5-36720 JP (JP, U) 4-57050 JP JP, B2) JP 6-9535 (JP, Y2) JP 4-40298 (JP, Y2) (58) Field surveyed (Int. Cl. ⁷ , DB name) H02G 3/22-3/28

Claims (2)

(57) [Claims] 1. A grommet body having a tubular portion fitted into a fitting hole of a panel and having a flange portion on the outer periphery of the tubular portion and joined to the panel is fixed to the panel using bolts. A grommet fixing tool, comprising: two substantially flat plate-like and substantially C-shaped, same-shaped bracket segments made of a hard material that fits outside the flange portion of the grommet body; Is mutual
Has both ends overlapping each other, and the bolt is inserted into one end.
Providing an insertion hole to be passed and one engaging portion of the lock mechanism,
At the other end, the insertion hole of the other bracket
The notch groove to be opened and the one of the other bracket segments
And the other engaging portion for engaging with the engaging portion of
And the engaging portions are engaged with each other and locked.
Before inserting into the insertion hole and notch groove of the bracket segment
A grommet fixture, wherein the bolt is tightened and fixed to the panel . 2. The grommet fixture according to claim 1, wherein the bolt is attached to each of the bracket bodies.