JPH04137432U - 2-piece grommet - Google Patents

Abstract

(57) [Summary] [Objective] To provide a two-piece grommet that is easy to assemble to a vehicle body and whose sealing function is not impaired even if the height of the flange formed in the mounting hole of the vehicle body varies. [Structure] A groove 26 is provided around the grommet member 20 having rubber elasticity, and a fixed reinforcing member 21 which is hard and has spring elasticity in the outward direction is fitted into the groove 26, and the engagement claw 30 at the tip of the fixing reinforcing member 21 is used to tighten the edge of the hole 3. The grommet member itself is engaged with the flange 18 of the hole, and the grommet member itself is expanded to increase the fixing force against the hole.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention is designed to connect wire bundles of electrical equipment installed in automobiles, air conditioner hoses, etc. to the vehicle body. When wiring or piping is routed through holes formed in appropriate locations, seal bundles of wires, etc. to the holes. This invention relates to a two-piece grommet that maintains and fixes its condition.

0002

[Conventional technology]

Conventionally, as this type of grommet, a rubber integrated grommet 1 shown in FIG. 3 has been known. ing. The integrated rubber grommet 1 has a fixing part 4 that fits into a hole 3 formed in the vehicle body 2. and a bellows-shaped support portion 6 that supports the wire bundle 5 are integrally formed of rubber. 7 is a tape for fixing the support portion 6 and the wire bundle 5.

0003 A two-piece grommet 8 shown in FIG. 4 is also known. 2 piece grommet 8 includes a support portion 9 made of a rubber elastic body and a hard material such as a plastic material such as polypropylene. The fixing part 10 is made of a stick, and the fixing part 10 is fitted into the support part 9. It is fixed. The fixing part 10 has engaging claws 12, 12 divided by a slit 11. -, which engage the edges of the hole 3. 13 is the seal lip, 7 is the tee It is a loop.

0004 Furthermore, a grommet 15 in which a metal fitting 14 shown in FIG. 5 is inserted is also known. Screws 16, 16 are screwed into the metal fitting 14, and screwed into screw holes 17, 17 provided in the vehicle body 2. It will be worn.

[0005]

[Problem that the idea aims to solve]

In the above-mentioned integrated grommet 1, when assembling it to the automobile body 2, the One worker is in two spaces separated by body 2, for example the cabin and the engine room. One worker pulls grommet 1, and the other worker pushes it at the same time. This is done by immersing the machine in the process, which has the problem of poor productivity.

[0006] In addition, in the case of the two-piece grommet 8, the strength of the edge of the hole 3 in the vehicle body 2 is improved. Because there are variations in the height of the flange 18 provided for the A gap may be formed between the lips 13. Moisture, dust, and noise can escape through this gap. The message is transmitted from one space to the other, and the grommet is supposed to fulfill the original role. There is a problem that the function of the system becomes insufficient.

[0007] The metal insert type grommet 15 uses the metal fitting 14, so it is heavier. It becomes heavier, the cost of the grommet increases, and screw fixing work is required. Therefore, the work is time-consuming, and the ring-shaped metal fitting 14 makes it difficult to enlarge the grommet. When assembling the wire bundle 5 into the grommet 15 for regulation, the penetration of the grommet 15 is There are problems such as the through hole cannot be enlarged and the work becomes troublesome.

[0008] This invention solves these problems, requires only one worker, and is easy to assemble to the car body. This provides a two-piece grommet that is easy to work with.

[0009]

[Means to solve the problem]

The two-piece grommet according to the present invention is fitted into a hole provided in an automobile body. The almost cylindrical fixing part and the supporting part that penetrates and supports the wire bundle etc. are made of rubber elastic material. and a grommet member integrally formed with the fixing part, which is connected to the fixing part a fixing reinforcing member that elastically expands outward to increase the engagement force with the hole; It is something that we have.

0010

【Example】

1 and 2, 19 is a two-piece grommet made of rubber such as EPDM. A grommet member 20 formed of It consists of a fixed reinforcing member 21 that increases the assembly force. The grommet member 20 is A substantially cylindrical fixing portion 22 and an electric wire are fitted into a hole 3 provided in an automobile body 2. It is composed of a support section 23 that supports the wire bundle 5 through it. The fixing part 22 is inserted into the hole 3. A first cylindrical body part 24 is formed at the base of the first cylindrical body part 24, and when the vehicle is fixed, The first flange portion 25 that contacts the body 2 and the first cylindrical body portion 24 in a direction parallel to its central axis. It has a groove 26 drilled therein.

[0011] The fixed reinforcing member 21 is a hard member such as a plastic material such as polypropylene. The cylindrical body is divided into four parts by a plurality of notches 27 parallel to the central axis, and has spring elasticity. The second cylindrical body part 28 is formed at the base of the second cylindrical body part 28 and when fixed. It consists of a second flange 29 that abuts the first flange 25. The divided second cylindrical body portion 28 Wedge-shaped engaging claws 30, 30- are formed at the tip. This second cylindrical body part 28 is inserted into the groove 26, elastically expands the first cylindrical body portion 24 outward, and fills the hole 3. increase the engagement force against the 31 is formed on the surface of the first flange portion 25 that is in contact with the vehicle body 2. The protruding seal lip elastically adheres to the car body 2 when assembled to the car body 2, preventing moisture and dust. Acts as a seal against dust and noise. 32 is a recess provided near the entrance of the groove 26. When the second cylindrical body part 28 is pulled out, the engaging claw 30 at the tip of the second cylindrical body part 28, 30- is inserted and has the effect of temporarily fixing the fixing reinforcing member 21 to the grommet member 20. vinegar. A tape 7 fixes the support portion 23 and the wire bundle 5.

0012 Next, the assembly work of the grommet 19 having the above structure will be explained. grommet parts 20 is fixed to a predetermined position of the wire bundle 5 by winding the tape 7. At this time, the fixed strength Even when the grommet member 21 is removed from the grommet member 20, it can be removed as shown in FIG. The engaging pawl 30 may be temporarily fixed to the concave line 32 of the sea urchin groove 26. such condition In this state, push the fixing part 22 of the grommet member 20 into the hole 3 of the vehicle body 2, and then press the first flange part 25. A seal lip 31 is brought into contact with the end surface of the vehicle body 2.

[0013] Next, as shown in FIG. 2, the fixed reinforcing member 21 pushes the grommet member 20. Push in the solder from the same direction to fit the engaging claw 30 to the tip of the groove 26. In addition, the groove 26 is designed to be longer than the flange 18 of the hole 3, so that the engaging claw 30 protrudes from the tip of the flange 18, enlarges the rubber part of the fixing part 22, and engages there. do. Thus, the fixed part 22 is expanded by fitting the second cylindrical body part 28. , the fixing force to the hole 3 is increased, and the engagement claw 30 is further tightened to the flange tip. The fixing force is further enhanced by engagement.

[0014] The height a of the second cylindrical body 28 is determined by the thickness b of the first flange 25, the height c of the flange 18, and the height a of the second cylindrical body 28. It is determined by the wall thickness d of the fixed portion 22 and the compression width of the seal lip 31. For example, a=18.5mm, b=10mm, c=5mm, d=3mm. I can do it.

[0015]

[Effect of the idea]

According to this invention, one worker inserts the grommet from one side of the space blocked by the vehicle body. Since it can be assembled by simply pushing it in, the assembly work becomes easy.

[0016] Even if there is some variation in the height of the flange provided at the hole edge, it will remain fixed. The grommet member located between the reinforcing member and the flange absorbs this elasticity. Therefore, the sealing function is not impaired due to this variation in height.

[0017] The fixing reinforcement member is made of lightweight plastic material, so the entire grommet It is possible to reduce the weight of the body. In addition, the manufacturing of fixing reinforcement members is greatly improved by injection molding methods, etc. Since it can be done at low cost, the cost of the grommet itself can be reduced. Wear.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view of a two-piece grommet in a divided state according to an embodiment of the present invention.

FIG. 2 is a partially sectional view of the same embodiment after assembly.

FIG. 3 is a sectional view of a conventional example.

FIG. 4 is a sectional view of another conventional example.

FIG. 5 is a sectional view of yet another conventional example.

[Explanation of symbols]

1, 8, 15, 19 grommet 2 Vehicle body 3 holes 4, 10, 22 Fixed part 5 Electric wire bundle 6,9,23 Support part 14 Metal fittings 20 Grommet member 21 Fixed reinforcing member 24 First cylindrical body part 25 First collar part 26 Groove 28 Second cylindrical body part 29 Second collar part 13,31 Seal lip 30 Engagement claw 32 Concave line

Claims (3)

[Scope of utility model registration request] Claim 1: A grommet member in which a substantially cylindrical fixing part that is fitted into a hole provided in an automobile body and a support part that penetrates and supports an electric wire bundle or the like are integrally formed of a rubber elastic body; A two-piece grommet, characterized in that it has a fixing reinforcing member that is coupled together and elastically expands the fixing portion outwardly to increase the engagement force with the hole. 2. The fixing part includes a first cylindrical body part that is inserted into the hole, a first collar part that is formed at the base of the first cylindrical body part and comes into contact with the vehicle body when it is fixed, and a first cylindrical body part that is inserted into the hole. The fixing reinforcing member is provided with a groove bored in the body in a direction parallel to the central axis of the body, and the fixing reinforcing member is divided into a plurality of notches parallel to the central axis of the cylindrical body. 2 cylindrical body parts;
a second flange formed at the base of the second cylindrical body and abuts the first flange when fixed; the second cylindrical body is fitted into the groove; 2. The two-piece grommet according to claim 1, wherein the grommet is enlarged. 3. The two-piece grommet according to claim 2, wherein the fixing reinforcing member has a wedge-shaped engagement portion at the tip of the second cylindrical body portion.