JP2000050458A - Packing and sealing structure of electrical junction box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a packing which can provide an effective sealing between a pair of members which are placed close to each other, and the sealing structure of an electrical junction box which employs the packing. SOLUTION: An engine room side junction box 16 and a cabin side junction box are connected to each other with their connectors through a through-hole 14 formed in a wall 11 between an engine room and a cabin. A packing 30 is attached to the outer surface of the engine room side junction box 16 so as to be pressed against the opening circumferential part of the through-hole 14 on the wall 11. Approximately V-shaped recesses 43 extended in a longitudinal direction are formed in the surface 30a of the packing 30 which is pressed against the wall 11. Lapping parts 44 which are held between the engine room side junction box 16 and the wall 11 are formed on both sides in the width direction of the surface 30a pressed against the wall.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing for sealing between a pair of members arranged close to each other, and a sealing structure of an electric junction box provided with the packing.

[0002]

2. Description of the Related Art Conventionally, for example, as an electric connection box for an automobile, an engine room side connection box and an indoor side connection box are formed through a through hole formed in a partition wall between an engine room and the room. Are configured so that they are connected by a connector section. In this conventional configuration, an annular packing is mounted on the outer surface of the engine room side connection box so as to be joined to the periphery of the opening of the through hole on the partition wall. The packing seals the space between the engine room side connection box and the partition so as to prevent water from entering the room from the engine room through the through hole.

[0003]

However, in this conventional electric junction box, the packing is formed to have a substantially square cross section, and the flat joint surface is simply joined to the partition wall surface at the periphery of the opening of the through hole. The space between the engine room side connection box and the partition is sealed. Therefore, there is a problem that the space between the engine room side connection box and the partition wall is not sufficiently sealed, and it is impossible to reliably prevent water from entering the engine room into the room.

The present invention has been made by paying attention to such problems existing in the conventional technology. The main object is to provide a packing that can effectively seal between a pair of members arranged close to each other.

Another object of the present invention is to provide a sufficient seal between the engine room side connection box and the partition.
An object of the present invention is to provide a seal structure of an electric junction box that can reliably prevent water from entering an engine room into the room.

[0006]

In order to achieve the above object, the invention according to claim 1 is mounted on one of a pair of members arranged close to each other and joined to the other member facing the other. In the packing for sealing between the two members, a substantially V-shaped concave portion extending in the longitudinal direction is formed on a joint surface with the opposed member.

According to a second aspect of the present invention, in the packing according to the first aspect, on both sides of the joining surface in the width direction,
A wrap portion sandwiched between both members is formed.
According to a third aspect of the present invention, the engine room-side connection box and the indoor-side connection box are connected to each other by a connector portion thereof through a through hole formed in a partition wall between the engine room and the room. In the electrical junction box described above, packing is mounted on the outer surface of the engine room side connection box so as to be joined to the opening periphery of the through hole on the partition wall, and the joint surface of the packing to the partition wall extends in the longitudinal direction. A substantially V-shaped concave portion is formed.

According to a fourth aspect of the present invention, the engine room side connection box and the room side connection box are connected to each other through the through holes formed in the partition wall between the engine room and the room. In the electrical junction box, the packing is mounted on the outer surface of the engine room side connection box so as to be joined to the periphery of the opening of the through hole on the bulkhead, and the packing is joined in the width direction of the bonding surface to the bulkhead. On both sides, a wrap portion sandwiched between the engine room side connection box and the partition is formed.

According to a fifth aspect of the present invention, the engine room side connection box and the room side connection box are connected to each other at the connector portion thereof through a through hole formed in a partition wall between the engine room and the room. In the electrical junction box adapted to be connected, a packing is attached to the outer surface of the engine room side connection box so as to be joined to the peripheral edge of the opening of the through hole on the partition, and the joining surface of the packing to the partition has a long side. Almost V extending in the direction
A concave portion having a U-shape is formed, and lap portions sandwiched between the engine room side connection box and the partition are formed on both sides in the width direction of the joint surface.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a seal structure for an electric junction box embodying the present invention will be described below in detail with reference to the drawings.

As shown in FIGS. 1 and 2, the partition wall 11 is disposed so as to partition an engine room 12 and a room 13 of an automobile. A through hole 14 is formed in a part of the partition wall 11 so as to protrude toward the room 13 side, and a pair of bolt insertion holes 15 is formed on both sides thereof. Through hole 1
4, an engine room side connection box 16 and an indoor side connection box 17 are provided on both sides of the partition wall 11.

The engine room side connection box 16 includes a substantially box-shaped case 18 and a cover 19 which is covered and mounted on an opening of the case 18. A pair of bolt insertion holes 20 are provided on both sides of the case 18. Is formed. A circuit board 21 is provided in the engine room side connection box 16, and a plurality of connection portions 23 for connecting the relay 22 and the like are provided on the circuit board 21.

A fitting projection 24 is formed on the outer surface of the case 18 so as to fit into the through hole 14 of the partition 11. A plurality of connection ports 25 are formed on the fitting projection 24, and a connector 45 provided at an end of the wire harness 26 is connected to the connection ports 25 from the room 13 side. . A substantially rectangular tube-shaped connector portion 27 protrudes from the fitting convex portion 24, and a plurality of connection terminals 28 are extended inside the connector portion 27.

An annular mounting groove 29 is formed on the outer surface of the case 18 so as to surround the fitting projection 24, and an annular packing 30 is fitted in the mounting groove 29.
The packing 30 is joined to the periphery of the opening of the through hole 14 from the engine room 12 side of the partition 11 to seal between the engine room side connection box 16 and the partition 11.

The indoor side connection box 17 has a substantially box-shaped case 31 and a cover 32 covered and mounted on an opening of the case 31, and a pair of bolt insertion holes 33 is formed on both sides of the case 31. Have been. A circuit board 34 is provided in the indoor connection box 17, and a plurality of connection portions 35 are provided on the circuit board 34 so as to be exposed on the outer surface of the cover 32.

As shown in FIG. 2, a pair of bolts 36 are inserted into the bolt insertion holes 33, 15, and 20 of the indoor connection box 17, the partition 11 and the engine room connection box 16, and a nut (not shown). And so on.
Thus, the engine room side connection box 16 and the indoor side connection box 17 are fixed to both side surfaces of the partition wall 11 with the partition wall 11 interposed therebetween.

A connector portion 37 is formed on an outer surface of the case 31 of the indoor side connection box 17 so as to protrude, and a plurality of connection terminals 38 are extended inside the connector portion. The connector 37 of the indoor side connection box 17 is connected to the through hole 1 of the partition 11.
4, the connector 2 of the engine room side connection box 16
7, and their connection terminals 38 and 28 are electrically connected via a relay terminal 39.

Next, the structure of the packing 30 will be described in detail. As shown in FIG. 3 and FIG.
Numeral 0 is formed in an approximately square cross section by an elastic material such as synthetic rubber. A plurality of annular grooves 41 and 42 are formed on the inner and outer peripheral surfaces of the packing 30, and as shown in FIG.
The packing 30 is fitted in the mounting groove 29 of the engine room side connection box 16 in a state where the annular grooves 41 and 42 are contracted.

On the joint surface 30a of the packing 30 with respect to the partition 11, two substantially V-shaped concave portions 43 are formed side by side so as to extend in the longitudinal direction. As shown in FIG. 4, when the joining surface 30 a of the packing 30 is joined to the surface of the partition 11 on the periphery of the opening of the through hole 14, these concave portions 43 are formed.
Are spread out, so that the contact area of the joint surface 30a with the partition 11 is increased.

A pair of lap portions 44 having a predetermined thickness are formed on both sides in the width direction of the joint surface 30a of the packing 30 so as to protrude. Then, as shown in FIG. 4, the joining surface 30 a of the packing 30 is
When joined to the surface, these wrap portions 44 are sandwiched between the engine room side connection box 16 and the partition wall 11.

As described above, in this electric connection box, the annular packing 30 is mounted on the outer surface of the engine room side connection box 16 corresponding to the through hole 14 of the partition wall 11, and the joining surface 30a of the packing 30 is provided. Are joined to the periphery of the opening of the through hole 14. Then, in the bonding state of the bonding surface 30a, the contact area of the bonding surface 30a with the partition wall 11 is expanded by expanding the V-shaped concave portion 43 formed on the bonding surface 30a. Further, wrap portions 44 protruding from both sides of the joint surface 30 are sandwiched between the engine room side connection box 16 and the partition wall 11.

Therefore, the space between the engine room side connection box 16 and the partition wall 11 can be sufficiently sealed by the packing 30 along the periphery of the opening of the through hole 14 on the partition wall 11. 14 through the room 13
It is possible to reliably prevent the risk of water intrusion into the water.

The effects that can be expected from the above embodiment will be described below. In the packing according to the present embodiment, a substantially V-shaped concave portion 43 that is attached to one of a pair of members arranged close to each other and that extends in the longitudinal direction is formed on the joint surface 30a with respect to the other opposing member. I have. For this reason, packing 3
0 when the joint surface 30a of the “0” is joined to the opposing member,
3 can be expanded to increase the contact area,
It is possible to effectively seal between a pair of members arranged close to each other.

In the packing of this embodiment,
On both sides of the joining surface 30a in the width direction, wrap portions 44 sandwiched between both members are formed. For this reason, packing 3
When the 0 joint surface 30a is joined to the opposing member, the lap portions 44 are sandwiched between the two members on both sides of the joint surface 30a, and the sealing effect between a pair of members arranged close to each other can be further enhanced. .

In the packing of this embodiment,
Two concave portions 43 are provided side by side on the joining surface 30a. For this reason, when the joint surface 30a of the packing 30 is joined to the opposing member, the two concave portions 43 are pushed apart, and the contact area can be further increased. Can be sealed.

In the seal structure of the electric junction box of this embodiment, the engine room side connection box 16 and the room side connection are formed through the through holes 14 formed in the partition wall 11 between the engine room 12 and the room 13. The box 17 is connected by the connector portions 27 and 37. A packing 30 is mounted on the outer surface of the engine room side connection box 16 so as to be joined to the periphery of the opening of the through hole 14 on the partition wall 11.
A substantially V-shaped concave portion 43 extending in the longitudinal direction is formed on the joint surface 30a of the packing 30 with the partition 11. Therefore, the joint surface 30a of the packing 30 is
When joined, the contact area increases due to the depression 43 being pushed out. Therefore, the space between the engine room side connection box 16 and the partition 11 can be sufficiently sealed, and the intrusion of water from the engine room 12 into the room 13 can be reliably prevented.

In the seal structure of the electric connection box of this embodiment, the engine room side connection box 16 is provided on both sides in the width direction of the joint surface 30 a of the packing 30 with the partition 11.
A wrap portion 44 to be sandwiched between the partition wall 11 and the partition wall 11 is formed. For this reason, when the joint surface 30a of the packing 30 is joined to the partition wall 11, the lap portions 44 are formed on both sides of the joint surface 30a by the engine room side connection box 16 and the partition wall 1.
1 between them. Therefore, the sealing effect between the engine room side connection box 16 and the partition 11 can be enhanced, and the intrusion of water from the engine room 12 into the room 13 can be prevented more reliably.

In the seal structure of the electric connection box of this embodiment, an annular mounting groove 29 is formed on the outer surface of the engine room side connection box 16, and a packing 30 is fitted and mounted in the mounting groove 29. . A plurality of annular grooves 41 and 42 are formed on the inner and outer peripheral surfaces of the packing 30. For this reason, the packing 30 is mounted in the mounting groove 29 in close contact with each other, and the sealing effect between the engine room side connection box 16 and the partition 11 can be further enhanced.

This embodiment can be modified and embodied as follows. -Forming one or three or more concave portions 43 on the joint surface 30a of the packing 30;

The annular grooves 41 and 42 on the inner and outer peripheral surfaces of the packing 30 are omitted. Further, technical ideas other than the claims grasped by the embodiment will be described below together with their effects.

[0031] The packing according to claim 1 or 2, wherein a plurality of recesses are provided in parallel on the joint surface. According to this configuration, when the joining surface of the packing is joined to the facing member,
The plurality of recesses can be expanded to further increase the contact area, and more effectively seal between a pair of members arranged close to each other.

An annular mounting groove is formed on the outer surface of the engine room side connection box, and a packing is fitted in the mounting groove, and a plurality of annular grooves are formed on the inner and outer peripheral surfaces of the packing. The sealing structure for an electric junction box according to any one of claims 3 to 5.

According to this configuration, the packing is mounted in the mounting groove in a close contact state, and the sealing effect between the engine room side connection box and the partition can be further enhanced.

[0034]

The present invention is configured as described above, and has the following effects. According to the first and second aspects of the present invention, it is possible to effectively seal between a pair of members that are disposed close to and opposed to each other.

According to the third, fourth and fifth aspects of the present invention, the space between the engine room side connection box and the partition can be sufficiently sealed, and the water from the engine room to the room can be sufficiently sealed. Intrusion can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of an electric junction box embodying the present invention.

FIG. 2 is an exploded perspective view showing a main part of the electric connection box.

FIG. 3 is a sectional view showing an assembling process of the seal structure of the electric junction box.

FIG. 4 is a sectional view showing an assembled state of the seal structure.

[Explanation of symbols]

11 ... partition wall, 12 ... engine room, 13 ... room, 14
... through-hole, 16 ... engine room side connection box, 17 ... indoor side connection box, 27 ... connector part, 28 ... connection terminal, 29 ... mounting groove, 30 ... packing, 30a ... joining surface, 37 ... connector part, 38 ... Connection terminals, 41, 42: annular groove, 43: concave portion, 44: lap portion.

Claims (5)

[Claims] 1. A packing which is mounted on one of a pair of members arranged close to and opposed to each other and is joined to the other member facing the other to seal between the two members. A packing formed with a substantially V-shaped recess extending in the longitudinal direction. 2. The packing according to claim 1, wherein wrap portions sandwiched between both members are formed on both sides of the joining surface in the width direction. 3. An electrical connection in which an engine room side connection box and an indoor side connection box are connected by their connectors via through holes formed in a partition wall between the engine room and the room. In the box, a packing is mounted on an outer surface of the engine room side connection box so as to be joined to an opening periphery of a through hole on a partition, and a substantially V-shaped extending in a longitudinal direction is provided on a joint surface of the packing with the partition. Seal structure of the electric junction box in which the concave portion is formed. 4. An electrical connection in which the engine room side connection box and the room side connection box are connected by their connectors via through holes formed in a partition wall between the engine room and the room. In the box, packing is mounted on the outer surface of the engine room side connection box so as to be joined to the opening periphery of the through hole on the partition, and on both sides in the width direction of the joining surface of the packing with respect to the partition, the engine room side is provided. A seal structure for an electric junction box having a wrap portion sandwiched between the junction box and the partition. 5. An electrical connection in which an engine room side connection box and an indoor side connection box are connected by their connectors via through holes formed in a partition wall between the engine room and the room. In the box, a packing is mounted on an outer surface of the engine room side connection box so as to be joined to an opening periphery of a through hole on a partition, and a substantially V-shaped extending in a longitudinal direction is provided on a joint surface of the packing with the partition. Are formed on both sides of the joining surface in the width direction.
A seal structure for an electric connection box having a wrap portion sandwiched between the engine room side connection box and the partition.