JPH0592924U - 2-piece type grommet - Google Patents

Abstract

(57) [Abstract] [Purpose] When mounting a grommet in a burring type hole with variations in flange height, variations in the gap between the grommet and the vehicle body are absorbed, and the sealing action is perfected. [Structure] An elastic seal lip 17 having a bellows-shaped bent portion is formed at a portion where a grommet main body 16 made of an elastic material elastically contacts the vehicle body 11, and due to the bending of the bent portion, variation in a gap between the grommet main body 16 and the vehicle body 11 is caused. Absorbs and perfects the seal lip 17's close contact with the vehicle body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a two-piece type grommet which is used as a blind plug that allows a wire harness, an air conditioner hose, etc. of an automobile to pass through a hole formed in a vehicle body and supports and fixes the sealed state or seals the hole. Regarding

[0002]

[Prior Art]

 Conventionally, when a wire harness for connecting electric devices mounted on an automobile or a hose such as an air conditioner is supported by penetrating a hole provided in a proper place of a vehicle body or when the hole is closed, a two piece as shown in FIG. 2 is used. Mold grommet 1 is used. The grommet 1 includes a grommet body 2 made of an elastic material such as rubber or thermoplastic resin elastomer, and an engaging portion 4 having an engaging claw 3. The engaging portion 4 is made of a hard material such as plastic. A groove 6 is formed in the grommet main body 2, and the flange portion 7 of the engaging portion 4 is fitted into the groove 6, and the both are coupled. Reference numeral 8 denotes a wire harness which penetrates the bellows-shaped support portion 9 of the grommet main body 2. Reference numeral 10 denotes a seal lip provided at a portion of the grommet body 2 that comes into contact with the vehicle body 11, and prevents rainwater, dust, noise, etc. from being transmitted from one space blocked by the vehicle body to the other space through the hole 12. . In addition, the hole 12 is often formed in a burring type in which a flange 13 is formed on the edge in order to improve the strength thereof. A tape 14 is wound around the grommet body 2 and the wire harness 8 to fix them.

[0003]

[Problems to be solved by the device]

 In the above structure, the height of the flange 13 varies (usually about ± 0.5 mm), so that the seal lip 10 may not come into close contact with the vehicle body 11. As a result, the seal becomes incomplete, moisture and dust invade the room, and noise becomes loud.

In order to deal with such a problem, the seal lip 10 has a large size, for example, a normal height of 0. If the thickness of about 5 mm is set to about 1 mm, the inserting force of the grommet 1 into the vehicle body 11 becomes large, and the efficiency of the assembling work deteriorates. The present invention has been made to solve such a problem.

[0005]

[Means for Solving the Problems]

 The present invention provides a grommet main body made of an elastic body that supports a wire harness, a hose, etc. through or seals a hole, and a hard grommet main body fixed to the grommet main body and fixed to a hole provided at a proper position in the vehicle body. A two-piece type grommet comprising an engaging part made of a member, wherein the edge of the hole of the vehicle body is sandwiched between the grommet body and the engaging portion, and a bellows is provided at a portion of the grommet body that contacts the vehicle body. An elastic seal lip having a curved portion is formed.

[0006]

【Example】

 In FIG. 1, reference numeral 15 denotes a two-piece type grommet, which is composed of a grommet main body 16 having rubber elasticity and a hard engaging portion 4, and is engaged with a hole 12 of a vehicle body 11 having a flange 13. Reference numeral 17 is an elastic seal lip having a height of about 4 to 6 mm and having a bellows-like bent portion, which is formed in a portion of the grommet main body 16 in contact with the vehicle body 11. The other structure of the grommet 1 is the same as that shown in FIG.

In the grommet 15 having such a structure, the wire harness 8 (FIG. 2) is passed through the grommet 15, and the engagement part 4 is pushed into the hole 12 in a state where the grommet body 16 and the engagement part 4 are fitted and coupled. Be done. As a result, the engaging claw 3 engages with the end surface of the hole 12 of the vehicle body 11, and at the same time, the seal lip 17 elastically adheres to the opposite surface of the vehicle body 11 in a bent state.

The seal lip 17 has a height of about 2 to 3 mm, which can be made higher than that of a conventional lip, and since it is formed in a bellows shape, the pressing and bending forces are constant and small. It's done. Therefore, even if there is a variation in the space between the vehicle body 11 and the grommet body 16, this can be absorbed and a sealing action can be achieved.

[0009]

[Effect of the device]

 According to the present invention, in the two-piece type grommet including the grommet body and the engaging portion, since the seal lip provided on the grommet body has the bellows-like bending structure, the height of the flange of the hole of the vehicle body varies. Even if it has, the sealing action can be perfected. That is, when the height of the flange is low and the distance between the grommet body and the vehicle body is small, the bellows part bends significantly. Conversely, when the height of the flange is high and the above interval is large, the bellows part bends little. , A certain sealing effect is obtained.

Further, according to the present invention, since the seal lip has the bellows shape, the pressing force required for the large or small bending degree is almost constant. Therefore, the grommet insertion force at the time of assembling can be made almost constant despite variations in the flange height.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a two-piece type grommet according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a conventional example.

FIG. 3 is a cross-sectional view showing a conventional example.

[Explanation of symbols]

 1,15 2 piece type grommet 2,16 Grommet main body 4 Engagement part 8 Wire harness 10,17 Seal lip 11 Car body 12 Hole 13 Flange

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[Procedure amendment]

[Submission date] April 28, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief explanation of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a two-piece type grommet according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a conventional example.

Claims (1)

[Scope of utility model registration request] 1. A grommet main body made of an elastic material for supporting a wire harness, a hose or the like or sealing a hole, and a hard body fixed to the grommet main body for fixing the grommet main body to a hole provided at a proper position in an automobile body. A two-piece grommet comprising an engaging portion made of a member, wherein an edge portion of a hole of the vehicle body is sandwiched between the grommet body and the engaging portion, and a bellows shape is provided on a portion of the grommet body in contact with the vehicle body. A two-piece grommet having an elastic seal lip having a bent portion.