JPH0134252Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a grommet for a wire bundle that protects and waterproofs a wire bundle that passes through a hole formed in a steel plate of an automobile.

Conventional grommets for wire bundles are made of one piece of rubber, which has excellent waterproof properties, but
It has the disadvantage that it is difficult to attach to the iron plate and is easy to come off.

An object of the present invention is to provide a grommet for a wire bundle that can be easily and reliably attached to a wall member without impairing the waterproof effect.

Therefore, according to the present invention, in a grommet for a wire bundle having an elastic part made of an elastic material and a rigid part made of a rigid material, the elastic part is
The outer periphery of the wire bundle has an annular waterproof lip, and the rigid portion is divided into two half-rings on its axial plane, each of which holds the wire bundle with a radial gap. a flange-like lip retainer extending radially outward from one end of the enclosing semi-cylindrical portion; and a lip retainer extending obliquely toward the lip retainer from the other end of the semi-cylindrical portion at a specific axial spacing. The abutting part of the rigid part, which is partially passed through the hole of the plate where the grommet is to be attached, comes into contact with one side of the plate, and the lip presser presses the waterproof lip of the elastic part. Press it against the other side of the board.

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

In FIG. 1, a grommet 1 for a wire bundle consists of an elastic part 2 made of rubber and a rigid part 3 made of synthetic resin. The elastic part 2 includes a cylindrical fixing part 5 that fits around the outer periphery of the wire bundle 4, a flange part 6 extending radially outward from the fixing part 5, and a steel plate 8 coupled to the radially outer end of the flange part 6. A waterproof lip 7 is provided on one side of the holder. The grommet 1 is fixed to the wire bundle 4 by wrapping a tape 9 around the fixing portion 5 and the outer periphery of the wire bundle 4. The rigid portion 3 includes a cylindrical portion 10 having an inner diameter sufficiently larger than the outer diameter of the wire bundle 4, extends radially outward from one end of the cylindrical portion 10, and enters between the flange portion 6 and the waterproof lip 7. Lip presser part 1 that presses the
1. A fixed arm 13 is provided at the other end of the cylindrical portion 10 and extends toward the waterproof lip 7 via a bent portion 12. The contact portion 16 that comes into contact with the other surface of the iron plate 8 is the fixed arm 13
It is formed in a stepped shape at the end of the waterproof lip 7 side.

The grommet 1 is fitted into the hole in the iron plate 8 from the left side in the figure, and at this time, the fixed arm 13 is compressed radially inward by the elasticity of the bent portion 12 and passes through the hole in the iron plate 8. When the inner circumferential edge of the hole in the iron plate 8 comes to the position of the abutment part 16, the fixed arm 13 moves radially outward, and the iron plate 8 is sandwiched between the waterproof lip 7 and the abutment part 16, and the grommet is inserted. 1 is fixed to an iron plate 8.

According to the invention, the rigid part 3 is constructed as two half-rings or symmetrical parts divided in the plane of its axis. One of its symmetrical parts is shown in FIGS. 2-6. In FIGS. 2 to 6, the same parts as in FIG. 1 are denoted by the same reference numerals, and explanations thereof will be omitted.
Both of the divided symmetrical parts are connected by being fitted into each other at the elongated protrusion 20 and the recess 21.

The rigid part 3 may also be configured as a folding mold which is bent and connected in the circumferential direction. 7 and 8 show a rigid part 3 of the folding type. In FIGS. 7 and 8, the same parts as in FIG. 1 are denoted by the same reference numerals, and explanations thereof will be omitted. The rigid portion 3 is constructed by joining two mutually symmetrical portions by a bent portion 23.

It goes without saying that the shapes of the elastic portion and the rigid portion are not limited to those shown in the drawings.

Thus, according to the present invention, when the grommet is fixed to the wire bundle 4 and passed through the hole in the iron plate 8, the waterproof lip 7 automatically connects the lip holder 11 and the iron plate 8 by the lip holder 11 and the contact part 16. Since the holes in the iron plate are sealed by being sandwiched between them, the grommet of the iron plate 8 can be easily and reliably attached and sealed. Note that when a connector is connected to the tip of the wire bundle 4, it is necessary to widen the diameters of the elastic portion 2 and the rigid portion 3 in order to pass the grommet through the wire bundle 4. If it is annular and integral, the diameter cannot be increased, and therefore the rigid portion 3 must be passed over the wire bundle 4 in advance. On the other hand, according to the present invention, if the rigid part is made up of two half-rings and made into a split type, only the easily deformable elastic part 2 is expanded in diameter and the wire bundle 4 with the connector is passed through the elastic part. What is necessary is to attach the rigid portion 3 to 2. As a result, installation workability is significantly improved and installation becomes easier.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an embodiment of the present invention, and FIGS. 2, 3, 4, and 5 are a front view, a top view, a bottom view, and a right side view of a split rigid body part, respectively. , FIG. 6 is a sectional view taken along the - line in FIG. 2,
FIGS. 7 and 8 are front and bottom views of the folding rigid portion. 1...Grommet, 2...Elastic part, 3...Rigid part, 5...Fixing part, 7...Waterproof lip, 11
... Lip presser section, 16 ... Contact section.

Claims (1)

[Scope of utility model registration request] In a grommet for a wire bundle having an elastic part 2 made of an elastic material and a rigid part 3 made of a rigid material, the elastic part 2 has an annular waterproof lip 7 on the outer periphery of the wire bundle 4, and the rigid part 3
is configured as two half-rings divided on the axial plane, each half-ring having a flange extending radially outward from one end of the semi-cylindrical portion 10 surrounding the wire bundle 4 with a radial gap therebetween. a shaped lip presser 11;
It has an abutment part 16 that extends obliquely from the other end of the semi-cylindrical part 10 toward the lip presser part 11 and faces the lip presser part 11 at a specific axial distance, and has an abutment part 16 that is attached to the plate 8 on which the grommet is to be attached. The contact portion 16 of the rigid portion 3, which is partially passed through the hole, comes into contact with one surface of the plate 8, and the lip presser portion 11 presses the waterproof lip 7 of the elastic portion 2 against the other surface of the plate 8. A grommet for wire bundles featuring: