JPH0939688A - Grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely attain waterproofness on the outdoor side and the indoor side by providing an indoor side cover on an inner sleeve fitted into a grommet main body and penetrating a car body panel, covering the electric wires inserted into the indoor side from a through hole with the indoor side cover, and extracting a wire harness from below. SOLUTION: A lip 12c protruded from the car body fitting section 12b of a grommet main body 12 having an electric wire insertion section 12a is pressed to the outer face of a car body panel 3a for the waterproof sealing of a car room. An inner sleeve 13 is inserted into the grommet main body 12, and a hook lug 13c is coupled with the through hole 3b of the car body panel 3a. An indoor side cover 14 is fitted to the protruded end of the inner sleeve 13, and a wire harness W/H-2 is extracted. The electric wire connecting portion of a connector 10b connected to the terminal of the indoor side wire harness W/H-2 is stored in the space 15 between the inner sleeve 13 and the circular arc section 14a of the indoor side cover 14. The infiltration of water is thus prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to grommets, and more particularly to a grommet which allows a wire harness to penetrate through a through hole provided in a vehicle body panel that separates the interior and exterior of an automobile. It is waterproof on both the outside and the inside.

[0002]

2. Description of the Related Art FIG.
As shown in (A) and (B), a step 3 which is one step lower than the floor 2 in the room of the automobile 1 is provided. The cover 4 is attached to the inclined vehicle body panel 3a in step 3, and the through hole 3b opened in the vehicle body panel 3a is inserted through the cover 4,
A wire harness W / H is arranged from the outside of the engine room to the inside of the room. In the wire harness W / H, a grommet 5 is attached to the outdoor side and the through hole 3b is passed through,
The space between the vehicle body panel 3a and the cover 4 is drawn into the vehicle interior 7.

As shown in FIG. 5C, the grommet 5 has a resin-made inner member 8 on a large-diameter vehicle body mounting portion 5a.
The inner member 8 is internally fitted with a protrusion 8a which penetrates the through hole 3b of the vehicle body panel 3a and projects into the vehicle interior 7. The tip of the protrusion 8a is engaged with the vehicle body panel 3a. The stopper 8b is formed, and the grommet 5 is fixed to the vehicle body by the inner member 8. Also, the body mounting portion 5a of the grommet 5
A lip 5b is projectingly provided at the tip of the above, and the lip 5b is pressed against the outer surface of the vehicle body panel 3a.

Normally, when washing a car, it is rare to wash the car directly with water spouted from a water hose, but in other countries, the car may be washed.

[0005]

In such a case, as shown in FIG.
As shown in (B), the car wash water a from the hose 9 enters the space between the vehicle body panel 3a and the cover 4 through the gap between the floor 2 and the cover 4, and as shown in FIG. There is a case where the connectors 10a and 10b fixed in the inner member 8 are splashed with water, and if the connectors 10a and 10b enter the connectors, a leak may occur. This problem is not taken into consideration in the fact that car wash is performed in Japan because there is no custom of car wash in Japan.
The actual situation is that / H and the like are not waterproofed.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a grommet capable of reliably waterproofing both the outdoor side and the indoor side.

[0007]

In order to achieve the above object, according to claim 1 of the present invention, a grommet attached to a wire harness which is inserted into a through hole provided in a vehicle body panel for partitioning a vehicle interior and a vehicle exterior. In addition, a small-diameter electric wire insertion portion that is located on the outdoor side, a large-diameter vehicle body mounting portion that is continuous with one end of the electric wire insertion portion, and a lip that presses against the outer surface of the vehicle body panel at the tip of the vehicle body mounting portion. A grommet main body made of rubber or an elastomer provided and fitted inside the vehicle body mounting portion of the grommet main body, and a protruding portion protruding from the vehicle body mounting portion is passed through the through hole of the vehicle body panel, and A resin inner sleeve having a locking protrusion that projects from the outer surface and engages with the peripheral edge of the through hole of the vehicle body panel, and an inner sleeve that is positioned inside and is detachably locked with the inner sleeve. Made from the resin of the indoor side cover,
The above-mentioned indoor side cover provides a grommet characterized by covering at least an upper portion of an electric wire that is inserted through a through hole of a vehicle body panel toward the indoor side and allowing a wire harness to be pulled out from below.

According to the first aspect of the present invention, the locking projection is locked to the vehicle body panel by inserting the protruding portion of the inner sleeve fitted in the vehicle body mounting portion of the grommet body into the through hole of the vehicle body panel. Thus, the grommet body is held together with the inner sleeve. In this mounted state, the lip of the grommet body is pressed against the outer surface of the vehicle body panel. After that, the interior side cover is fitted into the opening of the inner sleeve protruding into the vehicle compartment to cover the upper side of the wire harness, and the wire harness is pulled out from below the interior side cover.

Therefore, according to the grommet, the lip of the grommet body is pressed against the peripheral edge of the through hole on the outside of the vehicle, so that a waterproof seal is provided from the outside of the vehicle to the inside of the vehicle. It is possible to cover the upper part of the wire harness and prevent water from entering from above. As a result, even when the car wash is performed, the car wash water does not splash on the connector and the like housed inside the grommet.

The interior cover is substantially spoon-shaped,
While locking the arc portion opposite the inner sleeve,
A wire harness fixing piece protruding downward from the arc portion is provided, and the wire harness is fixed to the wire harness fixing piece by winding a tape or using a band. (Claim 2)

According to the grommet of the second aspect, the wire harness fixing piece protruding from the lower side of the indoor side cover and the wire harness are fixed by winding the tape or using a band, whereby the attached state can be maintained.

Inside the inner sleeve, there is provided a locking portion for locking the connector connected to the tip of the outdoor wire harness, and the arc portion of the indoor cover is between the inner sleeve and the inner sleeve. It is configured to have a space for accommodating the counterpart connector connected to the tip of the indoor side wire harness. (Claim 3)

According to the grommet according to the third aspect, in the state where the indoor side cover is attached to the inner sleeve, a space for accommodating the mating connector connected to the tip of the wire harness routed to the indoor side is provided between them. Since it is formed, it is possible to reliably prevent water from entering by covering the mating connector with the arcuate portion.

The grommet body has a circular cross section, and is positioned on the outer peripheral surface of the maximum diameter portion of the vehicle body mounting portion that is located along the periphery of the through hole of the vehicle body panel, and is positioned directly below when mounting the vehicle body panel. Is provided so that the wire harness fixing piece of the indoor side cover that engages with the inner sleeve inside the grommet body extends downward. (Claim 4)

According to the grommet according to the fourth aspect, since the positioning projection is provided at a position directly below when the vehicle body panel is mounted, the projection is provided when the inner sleeve is fitted in the vehicle body mounting portion. As a reference, the wire harness fixing piece can be surely extended downward by adjusting the position of the lock portion for attaching the indoor cover to be attached in the subsequent step. Further, even when the grommet is mounted on the vehicle body panel, the direction of the mounting position of the grommet can be easily determined by the protrusion.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail based on the illustrated embodiments. As shown in FIG. 1, the grommet according to the first embodiment of the present invention is an inclined vehicle body panel 3 such as step 3 for partitioning a vehicle interior 7 and an exterior 6 of an automobile.
A grommet main body 12 made of rubber or elastomer, and a resin which is fitted and held inside the grommet main body 12 and is locked to the vehicle body panel 3a, which is attached to the wire harness W / H inserted through the through hole 3b provided in a. The inner sleeve 13 is made of resin, and the indoor cover 14 made of resin is detachably engaged with the inner sleeve 13.

The wire harness W / H is composed of a wire harness W / H-1 arranged outside the vehicle and a wire harness W / H-2 arranged outside the vehicle. W / H-1 and W / H-2 are connected by connectors 10A and 10B inside the grommet.

As shown in FIGS. 1 and 2, the grommet body 12 has a circular cross section, and the outdoor wire harness W / H
-1 small-diameter wire insertion portion 12a that closely adheres to the outer periphery of -1, and a large-diameter vehicle body mounting portion 12b that is continuous with one end of the electric wire insertion portion 12a
And a lip 12c projecting from the tip end surface of the vehicle body mounting portion 12b and pressed against the outer surface side of the vehicle body panel 3a.

The vehicle body mounting portion 12b has a wire insertion portion 12a.
The continuous side with and is formed in a bellows shape with the diameter gradually reduced, and the maximum diameter portion 12d is formed by circumferentially bulging the end portion of the vehicle body panel 3a located along the peripheral edge of the through hole 3b. On the inner circumference of the maximum diameter portion 12d, a ring-shaped engagement concave portion 12e that engages and holds an engagement convex portion 13b of the inner sleeve 13 described later is provided. Further, on the outer peripheral surface of the maximum diameter portion 12d, a positioning projection 12f is provided at a position positioned directly below when the vehicle body panel is mounted. At the time of attachment to the vehicle body panel 3a, the protrusion 12f is positioned directly below and attached.

The lip 12c has a body mounting portion 12b.
It projects in a ring shape from the peripheral edge of the opening of the vehicle body, and is pressed against the outer surface of the vehicle body panel 3a in a mounted state to the vehicle body panel 3a so as to achieve a waterproof seal from the vehicle exterior 6 to the vehicle interior 7.

The inner sleeve 13 is a cylindrical body fitted inside the grommet body 12, and has a cylindrical portion 13a.
The engaging projection 13b that engages with the ring-shaped engaging recess 12e of the grommet body 12, the locking projection 13c that engages with the peripheral edge of the through hole 3b of the vehicle body panel 3a, and the interior cover 1 described above.
Locked part 1 engaging with lock part 14c projecting from No. 4
3d and a locking portion 13e that locks the connector 10A connected to the tip of the outdoor wire harness W / H-1 are integrally formed of resin.

The cylindrical portion 13a is a grommet main body 12
It has such a length that it protrudes from the front end opening of the vehicle body mounting portion 12b in a state of being mounted on the vehicle body, penetrates through the through hole 3b of the vehicle body panel 3a, and projects into the vehicle interior 7.

The engagement protrusion 13b projects in a ring shape from the outer peripheral surface of the cylindrical portion 13a, and the grommet body 1
The inner sleeve 13 and the grommet body 12 are kept attached to each other by engaging with the ring-shaped engaging recess 12e of the grommet body 1 through the inner sleeve 13.
The second lip 12c is pressed against the vehicle body panel 3a.

Three engaging projections 13c are provided on the outer peripheral surface of the projecting portion 13f of the cylindrical portion 13a projecting from the grommet body 12 in the assembled state at 120 ° intervals.

The locked portions 13d are formed between the adjacent locking protrusions 13c, and the protruding portions 13f are formed.
The outer surface of the interior of the interior cover 1 is recessed at the tip of the recess.
4 has a shape provided with a locking piece with which the lock portion 14c of No. 4 is engaged.

The engaging portion 13e is opposed to the engaging portion 10a for mounting which is previously formed on the connector 10A connected to the tip of the outdoor wire harness W / H-1. It projects from the inner peripheral surface of the cylindrical portion 13a.

The indoor cover 14 is substantially spoon-shaped, and has a wire harness fixing piece 14b protruding downward from a substantially hemispherical arc portion 14a covering the upper end opening of the inner sleeve 13.

The arcuate portion 14a is the inner sleeve 1
3, a space 15 for accommodating the mating connector 10B connected to the tip of the indoor side wire harness W / H-2.
Is formed. Further, a lock portion 14c is provided on the arc portion 14a so as to project at a position facing the locked portion 13d of the inner sleeve 13.

The wire harness fixing piece 14b is shown in FIG.
As shown in FIG. 7, the outer periphery is taped and fixed together with the indoor wire harness W / H-2 by extending downward in the state of being attached to the vehicle body panel 3a. Further, a tape fixing protrusion 14d is provided at the lower end portion, and a thin portion 14e is provided at a portion continuous with the circular arc portion 14a.

When assembling the above-mentioned grommet, first,
Inside the inner sleeve 13, the indoor side wire harness W
/ H-1, the locked portion 10a of the connector 10A connected to the terminal is locked and fixed to the locking portion 13e of the inner sleeve 13.

Next, the grommet body 12 is expanded in diameter by a grommet expander (not shown), and in this state, the outdoor wire harness W / H-1 is inserted and the inner sleeve 13 attached to the tip is inserted. Grommet body 1
It mounts in the vehicle body mounting part 12b of 2. At this time, the position of the locked portion 13d is adjusted so that the wire harness fixing piece 14b extends downward when the indoor cover 14 is attached to the inner sleeve 13 in a later step. More specifically, the projection 12 for positioning the grommet main body 12 is arranged so as to be located directly below when mounted on the vehicle body panel 3a.
Locked part 1 of inner sleeve 13 based on f
The position of 3d is adjusted, and the engagement protrusion 13b is engaged with the ring-shaped engagement recess 12e.

Then, in the automobile assembly line, the protrusion 13f of the inner sleeve 13 protruding from the vehicle body mounting portion 12b of the grommet body 12 is inserted into the through hole 3b of the vehicle body panel 3a, and the locking protrusion 13c is inserted into the through hole 3b. It is attached by engaging with the peripheral edge of the vehicle interior 7. At this time, the operator grips the maximum diameter portion 12d of the grommet main body 12 and attaches it so that the positioning projection 12f is located right below. As a result, the lip 12c of the grommet main body 12 is pressed against the outer surface of the vehicle body panel 3a, and a waterproof seal is provided from the outside 6 to the inside 7.

Next, the connector 10B connected to the terminal of the wire harness W / H-2 arranged in the passenger compartment 7 is
The wire harness W / H-1 and W / H-2 are connected by fitting with the connector 10A attached in the inner sleeve 13 of the grommet.

Then, the indoor side wire harness W / H-2
Is extended downward along the vehicle body panel 3a, the indoor side cover 14 is attached to the projecting end opening of the inner sleeve 13, and the wire harness W / H-2 is attached to the indoor side cover 1
Assembling is completed with the sheet pulled out from below 4. At this time, the inner sleeve 13 is the inner cover 1
Since the position of the locked portion 13d is adjusted with the protrusion 12f of the grommet body 12 as a reference so that the wire harness fixing piece 14b of No. 4 extends downward, the wire harness fixing piece 14b can be easily and surely attached in the proper direction. .

As a result, the space 15 formed between the inner sleeve 13 and the circular arc portion 14a of the indoor cover 14 is formed.
The electric wire connection portion of the connector 10B connected to the terminal of the indoor side wire harness W / H-2 is accommodated therein.

Then, the outer circumference of the wire harness fixing piece 14b of the indoor side cover 14 and the indoor side wire harness W / H-2 is fixed by winding the tape 16 around it. In addition, you may fix the wire harness fixing piece 14b and the indoor side wire harness W / H-2 using a band.

As described above, in the state where the grommet of the present invention is attached to the vehicle body panel 3a, the lip 12c of the grommet body 12 is pressed against the peripheral edge of the through hole 3b to provide a waterproof seal outside the vehicle interior 6. In the room 7, the arc portion 14a of the indoor side cover 14 covers the upper part of the wire harness W / H-2 to prevent water from entering.

Therefore, as shown in FIG. 3, even if the vehicle is washed with the hose 9, the washing water a can be prevented from splashing on the connectors 10A and 10B fixed to the inner sleeve 13. It is possible to prevent the occurrence of leaks. Further, in the above-mentioned grommet, since the projection 12f for positioning is provided on the grommet main body 12 and the direction is adjusted when the inner sleeve 13 is assembled and mounted on the vehicle body panel 3a, the mounting workability is improved. In addition, it is possible to reliably prevent erroneous mounting.

FIG. 4 shows the grommet of the second embodiment,
The grommet is an arc portion 14a of the indoor side cover 14.
Further, an outer frame portion 13g for covering the outer peripheral surface of the protruding portion 13f of the inner sleeve 13 protruding from the through hole 3b of the vehicle body panel 3a is provided. According to the grommet of the second embodiment, it is possible to reliably prevent water from entering the inside of the inner sleeve 13.

[0040]

As is apparent from the above description, in the grommet according to claim 1 of the present invention, the grommet main body is attached to the through hole of the vehicle body panel via the inner sleeve, and the lip of the grommet main body is used to fix the vehicle. It is possible to make a waterproof seal from the outside to the inside of the vehicle. On the other hand, in the passenger compartment, the inner side cover is attached to the protruding portion of the inner sleeve that penetrates through the vehicle body panel to cover at least the upper part of the wire harness. Can be prevented from entering. Therefore, water is not splashed on the connector fixed in the inner sleeve, and the occurrence of leak can be prevented.

In the grommet according to a second aspect of the present invention, the indoor cover is formed into a spoon shape, and the wire harness fixing piece protruding from below is tape-wound on the wire harness.
Alternatively, since it is configured to be fixed using a band, it is possible to stably hold the attached state of the indoor side cover.

In the grommet according to the third aspect, a space is formed between the inner sleeve and the arc portion of the indoor cover for accommodating the mating connector of the wire harness arranged indoors. Therefore, it is possible to reliably prevent water from splashing on the connector.

In the grommet according to the fourth aspect, when the grommet is mounted on the vehicle body panel, the positioning projection is provided at a position directly below, so that the inner sleeve is mounted inside the grommet and the vehicle body. Workability when mounting on a panel can be improved. Further, since the positions of the inner sleeve and the lock portion of the indoor cover can be adjusted in advance with the protrusion as a reference, it is possible to prevent the directionality of the wire harness fixing piece from being deteriorated due to incorrect mounting. .

[Brief description of drawings]

FIG. 1 is a sectional view showing a state in which a grommet according to a first embodiment of the present invention is attached to a vehicle body panel.

FIG. 2 is an exploded perspective view of the grommet according to the first embodiment.

FIG. 3 is a schematic view showing a state in which a grommet is attached to a tilted vehicle body panel of a step of an automobile.

FIG. 4 is a cross-sectional view of essential parts showing a state in which the grommet of the second embodiment is attached to a vehicle body panel.

5A is a perspective view of an automobile, FIG. 5B is a schematic view showing a state in which a conventional grommet is attached to a vehicle body panel with an inclined step, and FIG. 5C is a sectional view showing a state in which the vehicle body panel is attached. is there.

[Explanation of symbols]

 3a Vehicle body panel 3b Through hole 6 Vehicle interior 7 Vehicle exterior 10A Connector 10B Counterpart connector 12 Grommet body 12a Electric wire insertion part 12b Vehicle body mounting part 12c Lip 13 Inner sleeve 13c Locking protrusion 13f Projection part 14 Indoor side cover 14a Arc part 14b Wire harness Fixed piece W / H wire harness W / H-1 Indoor side wire harness W / H-2 Indoor side wire harness

Claims (4)

[Claims] 1. A grommet which is attached to a wire harness which is inserted into a through hole provided in a vehicle body panel for partitioning a vehicle interior and an exterior of a vehicle, the wire insertion portion having a small diameter, which is located outside the vehicle, and the wire insertion portion. A grommet body made of rubber or elastomer having a large-diameter vehicle body mounting portion that is continuous to one end of the portion, and a lip that presses against the outer surface of the vehicle body panel at the tip of the vehicle body mounting portion, and the inside of the vehicle body mounting portion of the grommet body. And a locking projection that protrudes from the vehicle body mounting portion and penetrates the through hole of the vehicle body panel and projects from the outer surface of the protruding portion and engages with the peripheral edge of the through hole of the vehicle body panel. A resin inner sleeve and a resin inner cover that is located inside the vehicle and is detachably engaged with the inner sleeve. At least upward over, grommet, characterized in that it is shaped to draw the wire harness from below the through-hole of the electric wire to be inserted into the indoor side. 2. The indoor cover is substantially spoon-shaped, and has a circular arc portion facing the inner sleeve and locked, and a wire harness fixing piece projecting downward from the circular arc portion is provided. The grommet according to claim 1, wherein the wire harness is fixed by winding a tape or using a band. 3. The inner sleeve is provided with a locking portion for locking a connector connected to a tip of an outdoor wire harness, and an arc portion of the indoor cover is formed with the inner sleeve. The grommet according to claim 1 or 2, wherein a space for accommodating the mating connector connected to the tip of the indoor side wire harness is provided therebetween. 4. The grommet body has a circular cross section, and is located on the outer peripheral surface of the maximum diameter part of the vehicle body mounting portion located along the peripheral edge of the through hole of the vehicle body panel, and at a position directly below when mounting the vehicle body panel. The grommet according to claim 2 or 3, wherein a positioning projection is provided, and a wire harness fixing piece of the indoor side cover that engages with an inner sleeve inside the grommet body is extended downward.