JPH039214Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to a grommet for a harness.

(Prior art) In automobiles, for example, a through hole for passing the harness of electrical equipment is provided in the partition wall (dash lower panel) between the passenger compartment and the engine room, and grommets are used to hold the harness and seal the through hole. ing.

An example of the above-mentioned grommet is described in Japanese Utility Model Application Publication No. 58-31721, but in this example, a sound insulating material is layered on a vehicle body panel having a harness insertion hole.
A cylindrical part that supports a harness (cable) from the outer periphery and is fitted into a vehicle body panel, and a flange part that abuts a sound insulating material are integrally molded via a connecting part. In other words, this grommet has two parts: a seal part (cylindrical part) that contacts the vehicle body panel and seals the insertion hole, and a seal part (flange part) that contacts the sound insulation material and seals the opening of the sound insulation material. It has a heavy seal structure.

When assembling such a grommet with a double seal structure to the vehicle body, with the grommet attached to the harness, insert the grommet together with the harness into the insertion hole of the vehicle body panel from the opposite side of the sound insulating material, and then insert the grommet together with the harness into the insertion hole of the vehicle body panel from the opposite side of the sound insulating material. The seal portion is pulled out from the insertion hole toward the sound insulation material and brought into contact with the sound insulation material. In this case, when removing the seal part, a method is adopted in which the seal part is pulled out together with the harness and then pushed back so that the seal part comes into contact with the sound insulating material. Normally, an extra tension of about 30 mm is required at the connection part with the seal part that comes into contact with the sound insulation material. Therefore, it is necessary to make the overall length of the grommet extra long, and there must be enough space on the sound insulation material side for pulling the harness as described above, and when the harness is bent on the body panel side and guided to the insertion hole , the position where the harness can be bent on the side of the vehicle body panel is further away from the vehicle body panel by an amount corresponding to the above-mentioned pulling allowance,
Furthermore, when using a molded harness that is bent by molding in advance, the above-mentioned tension allowance must be taken into consideration during molding.

(Purpose of the invention) The present invention is designed to prevent the harness from moving forward or backward.
In other words, the present invention aims to solve the conventional problems by making it possible to extract the seal portion that contacts the sound insulating material from the harness insertion hole of the vehicle body panel without providing any extra tension.

(Structure of the invention) The grommet of the invention includes a first seal part that contacts the vehicle body panel, a second seal part that contacts the sound insulation material, a connecting part that connects both seal parts, a harness clamping part, and a second seal part that contacts the sound insulation material. The second seal part is provided with a protrusion protruding from the second seal part to the opposite side of the first seal part, and by pulling this protrusion, only the second seal part can be extracted from the insertion hole of the vehicle body panel without substantially moving the harness. I'm trying to do that.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

Example 1 This example is illustrated in FIGS. 1 and 2. In the figure, 1 is a grommet, and an insertion hole 4 through which a harness 3 is inserted is formed in a dart lower panel 2 that partitions a passenger compartment and an engine room.
Grommet 1 supports harness 3 in insertion hole 4. A sound insulating material 7 consisting of a sound absorbing material (felt) 5 and a skin (vinyl chloride) 6 is superimposed and fixed on the back surface of the lower darts lower panel 2, that is, the surface facing the passenger compartment. An opening 8 is provided corresponding to the insertion hole 4 .

The grommet 1 is made of an elastic material (rubber material), and includes a cylindrical harness holding part 9 that holds the outer periphery of the harness 3, and a sound insulating material of the needle lower panel 2 that is fitted into the insertion hole 4. An annular first seal portion 10 that engages with the opposite surface and seals the insertion hole 4; and an annular second seal portion 11 that abuts the skin 6 of the sound insulating material 7 and seals the opening 8. It is equipped with Harness clamping part 9 and the first
The seal portion 10 and the second seal portion 11 are integrally formed at an annular connecting portion 12 . A bellows part 13 that is externally fitted onto the harness 3 extends from the first seal part 10 toward the engine room side (left side in the drawing),
Further, a lip portion 14 that comes into contact with the outer peripheral surface of the harness 3 is provided on the inner side of the first seal portion 10 on the side of the connecting portion 12 . Then, an annular protrusion 15 is provided on the surface of the second seal portion 11 on the vehicle interior side (right side in the drawing), the diameter of which is slightly smaller than that of the insertion hole 4, and which can be gripped with a tool or the like. .

When assembling the grommet 1 above,
Fit the grommet 1 into the harness 3, and in that state, remove the needle lower panel 2 from the engine room side.
The grommet 1 is inserted together with the harness 3 into the insertion hole 4, and the first seal portion 10 is engaged with the dart lower panel 2. At this time, the second
The protrusion 15 of the seal portion 11 passes through the insertion hole 4 toward the vehicle interior, but the peripheral portion of the second seal portion 11 is caught in the insertion hole 4. Then, grasp the protrusion 15 and pull it toward the passenger compartment, pull out the second seal part 11 from the insertion hole 4 as shown by the chain line, and bring the second seal part 11 into contact with the sound insulation material 7 as shown in FIG. urge
In this case, the portion from the connecting portion 12 to the base of the protruding portion 15 serves as a pulling allowance for pulling out the second seal portion 11 from the insertion hole 4.
When the harness 3 is removed, there is almost no movement of the harness 3.

Therefore, since the grommet 1 does not require the harness 3 to be moved during assembly, there is no need for extra tension in the length of the harness in the longitudinal direction of the grommet 1. No extra space is required for harness tension. The harness 3 can be bent in a desired direction at positions close to the dart lower panel 2 and the sound insulating material 7 on the engine room side and the passenger compartment side, respectively. Furthermore, when using a molded harness, there is no need to consider harness tension during molding.

Therefore, in the assembled state, the insertion hole 4 and the opening 8 are sealed by the first seal part 10 and the second seal part 11, but both the seal parts 10, 1
1 is in contact with the harness 3 at the connecting part 12 where the harness clamping part 9 is connected, and
The first seal portion 10 is also in contact with the lip portion 14 and the bellows portion 13. Therefore, the sound from the engine room side is also shielded by the bellows part 13 and the lip part 14, and the first and second seal parts 1
The double sealing effect due to 0 and 11 becomes even greater.

Example 2 This example is shown in FIG. 3, and is an example in which the bellows part 13 of Example 1 is removed and the double sealing effect of the first and second seal parts 10 and 11 is effectively utilized. It is. Regarding the components of this example,
Components corresponding to those in Example 1 are given the same reference numerals.

That is, in the grommet 16 of this example,
The connecting portion 17 connecting the first seal portion 10 and the second seal portion 12 is cylindrical, and its entire inner peripheral surface is in close contact with the harness 3. Each inner end portion is configured to abut on the harness 3 at intervals in the harness longitudinal direction. Then, the first seal part 10
is provided with an annular lip portion 18 on its inner side, and contacts the harness 3 at two locations, the connecting portion 17 and this lip portion 18, so that the same double sealing effect as in Example 1 can be sufficiently obtained. be. Other structures such as the harness clamping part 9 and the projection part 15 are the same as in the first embodiment.

In each of the above embodiments, a single lip portion is provided, but a plurality of lip portions spaced apart in the longitudinal direction of the harness may be provided to increase the sealing effect.

(Effects of the invention) According to the invention, the total length of the grommet in the longitudinal direction of the harness is shorter than that of the conventional grommet by an amount corresponding to the pulling allowance for pulling out the second seal part from the insertion hole. Since the harness does not need to be moved when the two-seal portion is extracted, the bending position of the harness can be brought closer to the vehicle body panel and the sound insulation material.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a vertical sectional view showing the grommet of embodiment 1 in an assembled state, and FIG.
The figure is a longitudinal sectional view showing the grommet in the same example in the middle of being assembled, and FIG. 3 is a longitudinal sectional view showing the grommet of the second embodiment in the assembled state. 1, 16... Grommet, 2... Dash lower panel, 3... Harness, 4... Insertion hole, 7...
Sound insulation material, 8...opening, 9...harness clamping part,
10...first seal part, 11...second seal part,
12, 17...Connection part, 15...Protrusion part.

Claims (1)

[Scope of utility model registration request] a first sealing portion that contacts a vehicle body panel in which an insertion hole through which the harness is inserted to seal the insertion hole; and a sound insulation portion that contacts a sound insulation material layered on the back surface of the vehicle body panel and corresponds to the insertion hole; a second seal portion for sealing the opening of the material;
The second seal part is removed from the insertion hole and the second seal part is applied to the sound insulating material. 1. A grommet that is brought into contact with a grommet, wherein the second seal portion is provided with a protrusion for removing the second seal portion from the insertion hole.