JP2003111246A - Seal inspection method for grommet and seal inspection device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seal inspection method for a grommet and a seal inspection device therefore capable of efficiently inspecting the sealability of the grommet with a structure comparatively compact in size. SOLUTION: The seal inspection device for the grommet 21 comprises: a water storage cup 22 which is liquid-tightly mounted to the external periphery 15 of a wireharness penetration part 20b, an air feed pipe 27 which is formed at the opposite side of the wireharness penetration part 20b with a body 20c of the grommet 20 between, and of which the tip 27a is inserted between a wire-exposed part 28 and the internal periphery of a wire penetration part 20a in which the wire-exposed part 28 of the a wireharness W/H is inserted, a fastening band 40 which is mounted to the external periphery of the wire penetration part 20a and airtightly fastens the wire penetration part 20a together with the air feed pipe 27 and the wire-exposed part 28, and an air compressor 42 which feeds pressurized air into the body 20c of the grommet 20 via the air feed pipe 27.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grommet seal inspection method and a seal inspection device for inspecting a sealed state of a wire harness penetrating portion in a grommet having a wire harness penetrating therethrough.

[0002]

2. Description of the Related Art As a conventional grommet seal inspection device, for example, there is a seal inspection device disclosed in Japanese Patent Laid-Open No. 2000-241288. This seal inspection device 1 is shown in FIG.
As shown in the schematic configuration diagram of the main part, a water storage tank 3 is continuously provided above the air tank 2 through a partition wall 4. An attachment hole 5 is formed in the partition wall 4 so that the grommet 10 can be fitted from the water storage tank 3 side so that the air tank 2 and the water storage tank 3 are communicated with each other.

A supply / exhaust means (not shown) for supplying and discharging pressurized air is connected to the air tank 2 through a supply / exhaust pipe 6. A water supply / drainage means (not shown) for supplying and discharging water is connected to the water storage tank 3 via a water supply / drainage pipe 8. The grommet 10 is made of rubber and has a substantially conical shape as a whole, and the grommet 10 is set in the seal inspection device 1 in a posture in which the top of the cone is directed upward. A circumferential mounting groove 13 is formed on the outer peripheral surface of the grommet 10 on the large-diameter end side. Further, a through hole 11 is formed at a position which is the top of the cone, and the wire harness W / H is penetrated therethrough.

At the portion of the wire harness W / H penetrating the through hole 11 of the grommet 10, the gap between the electric wires is sealed in a watertight state by the seal liquid, and the urethane sheet 12 or the tape is attached to the sealed portion. T is wrapped around, and a waterproofing treatment is performed between the T-shaped portion and the tubular portion in which the through hole 11 is formed.

Therefore, using the seal inspection device 1,
In the case of inspecting the sealing state of the wire harness penetrating portion of the grommet 10, first, the mounting groove 13 of the grommet 10 is fitted into the peripheral edge of the mounting hole 5 in a watertight state, and the top of the cone is directed upward. Set with. Then, pressurized air is supplied from the air supply / exhaust means (not shown) into the air tank 2 via the air supply / exhaust pipe 6, and then water is supplied from the water supply / drain means (not shown) into the water storage tank 3 via the water supply / drain pipe 8. .

In this state, the seal inspection is performed by observing the inside of the water storage tank 3. If the gap between the electric wires or the gap between the wire harness W / H and the grommet 10 is not sufficiently sealed, the pressurized air in the air tank 2 will leak into the water in the water tank 3 through these defective seal portions. It comes out and becomes bubbles and rises. If the seal is normal, no bubbles will be generated. That is, whether the sealing property is good or bad is judged by the presence or absence of bubbles in the water storage tank 3.

[0007]

However, in the above-described conventional grommet seal inspection device 1, the air tank 2 and the water storage tank 3 cause the size of the device to increase, and the control and operation of the water supply / drainage system for the water storage tank 3 are performed. In addition, there is a problem that maintenance is complicated and that it takes a lot of time to replace the grommet 10 and water. Therefore, an object of the present invention is to solve the above problems, and to provide a grommet seal inspection method and a seal inspection device capable of efficiently inspecting the grommet sealability with a relatively compact configuration. .

[0008]

The above-mentioned object of the present invention is a seal inspection method for inspecting a sealed state of a wire harness penetrating portion in a grommet having a wire harness penetrating therethrough. And a water storage cup in a liquid-tight manner, and the inner periphery of the wire penetration portion formed on the opposite side of the wire harness penetration portion with the main body of the grommet sandwiched between the wire harness exposed portion and the wire penetration portion. Inside the water storage cup to which water is supplied, while airtightly inserting the tip of the air supply pipe between the exposed portion and the main body of the grommet through the air supply pipe while supplying pressurized air. This is achieved by the grommet seal inspection method, which is characterized by inspecting the sealed state according to the presence or absence of water bubbles.

Further, the above object of the present invention is a seal inspection device for inspecting a sealing state of a wire harness penetrating portion in a grommet having a wire harness penetrating therethrough, which is liquid-tight with respect to the outer periphery of the wire harness penetrating portion. A water storage cup to be mounted, and an inner periphery of the wire penetration portion formed on the opposite side of the wire harness penetration portion with the main body of the grommet sandwiched between the wire penetration portion and the wire exposure portion An air supply pipe having a tip inserted between them; a tightening member that is attached to the outer periphery of the wire penetration portion and tightens the wire penetration portion in an airtight manner together with the air supply pipe and the wire exposed portion; and the air supply It is achieved by a grommet seal inspection device characterized by comprising an air supply means for supplying pressurized air into the main body of the grommet through a pipe.

According to the above construction, it is possible to eliminate the large-sized air tank and the water storage tank which have been conventionally required.
In addition, the amount of water used for pouring into the water storage cup is extremely small compared to the conventional seal inspection device that uses a water storage tank, eliminating the need for a large-scale water supply means and draining water by simply tilting the wire harness together with the water storage cup. It can be done and has excellent workability. Therefore, the device configuration becomes compact, and the sealability of the grommet can be efficiently inspected in a short time, so that the seal inspection can be performed in accordance with the tact in the manufacturing process of the wire harness W / H.

Preferably, the water storage cup has a split structure that can be halved along the longitudinal direction of the wire harness, so that the grommet can be easily attached to and detached from the wire harness penetrating portion, and workability is further improved. improves.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a grommet seal inspection method and a seal inspection device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic sectional view showing a grommet seal inspection device according to an embodiment of the present invention, and FIG. 2 is a partially cutaway exploded perspective view of the water storage cup shown in FIG.

The grommet 20 according to the present embodiment is made of rubber having a shape in which both ends of the main body 20c are narrowed as the wire penetration portion 20a and the wire harness penetration portion 20b,
A mounting groove 20d in the circumferential direction is formed on the outer peripheral surface of the main body 20c. A wire harness W / H is penetrated through the wire penetration portion 20a and the wire harness penetration portion 20b.

As shown in FIG. 1, the grommet seal inspection device 21 according to the present embodiment has a water storage cup 22 that is mounted in a liquid-tight manner on the outer periphery 15 of the wire harness penetration portion 20b of the grommet 20, and the grommet. Two
The wire harness penetrating portion 20 with the main body 20c of 0 interposed therebetween.
An air supply pipe 27 having a tip 27a inserted between the inner periphery of the wire penetrating portion 20a formed on the side opposite to b and penetrating the wire exposing portion 28 of the wire harness W / H and the electric wire exposing portion 28. And a tightening band 40 as a tightening member that is attached to the outer periphery of the wire penetration portion 20a and airtightly tightens the wire penetration portion 20a together with the air supply pipe 27 and the wire exposed portion 28, and the grommet 20. The main body 20c is provided with an air compressor 42 as an air supply means connected to the other end of the air supply pipe 27 via a regulator 41 in order to supply pressurized air.

As shown in FIG. 2, the water storage cup 22 is composed of divided bodies 22a and 22b having a divided structure that can be divided in half along the longitudinal direction of the wire harness W / H. , 22b are integrated,
A cylindrical space 24 capable of storing water is defined. The cylindrical space 24 has an inner diameter slightly larger than the diameter of the wire harness W / H, so that the water supply amount can be minimized. On the bottom wall of the water storage cup 22,
A mounting hole 23 is formed through which the wire harness penetrating portion 20b of the grommet 20 can be inserted.
By integrating 22b, the wire harness penetration portion 20
The outer periphery 15 of b can be clamped.

A seal member 31 such as a rubber packing is provided on the abutting surfaces of the divided bodies 22a and 22b and the inner surface of the mounting hole 23, and the wire harness penetrating portion 20b.
It is possible to make a liquid-tight contact with the outer periphery 15 of the above and to seal the abutting portions of these divided bodies 22a, 22b in a liquid-tight manner. Then, the divided body 22a of the water storage cup 22,
The wire harness penetrating portion 20 of the grommet 20 is integrated by the locking lock means (not shown).
Hold b.

Therefore, when inspecting the sealing state of the wire harness penetration portion 20b of the grommet 20 using the seal inspection device 21, first, water is stored in the outer periphery 15 of the wire harness penetration portion 20b of the grommet 20. The cup 22 is mounted in a liquid-tight manner. Next, the inner circumference of the wire penetration portion 20a of the grommet 20 and the wire exposed portion 28
After inserting the tip 27a of the air supply pipe 27 between the
The outer circumference of the wire penetration portion 20a is tightened with a tightening band 40, and the inner circumference of the wire penetration portion 20a and the wire exposed portion 28 are tightened.
Airtightly seals between the main body 20c of the grommet 20
Shuts off the inside of the room from the outside air.

After supplying water into the cylindrical space 24 of the water storage cup 22, the air compressor 42 is driven to supply pressurized air into the main body 20c of the grommet 20 through the air supply pipe 27. In this state, the seal inspection is performed by observing the inside of the water storage cup 22. If the gap between the grommet 20 and the wire harness W / H in the wire harness penetrating portion 20b is insufficiently sealed, the pressurized air supplied into the main body 20c of the grommet 20 through the air supply pipe 27. Leaks into the water in the water storage cup 22 through the poorly sealed portion, and floats as bubbles. If the seal is normal, no bubbles will be generated. That is, whether the sealing property is good or bad is judged by the presence or absence of bubbles in the water storage cup 22.

That is, according to the seal inspection apparatus 21 of the present embodiment, the air tank 2 and the water storage tank 3 as shown in FIG. Also, the water storage cup 2
The amount of water used by pouring into 2 is extremely smaller than that of the seal inspection device 1 using the conventional water storage tank 3, and a large-scale water supply means is not required, and the wire harness W /
The water can be drained simply by tilting H together with the water storage cup 22, which is excellent in workability.

Therefore, the device structure is much more compact than that of the conventional seal inspection device 1, and the sealability of the grommet 20 can be inspected efficiently in a short time. Therefore, the manufacturing process of the wire harness W / H is performed. It is possible to perform a seal inspection according to the takt time. It is needless to say that the grommet seal inspection method and seal inspection device of the present invention are not limited to the configurations of the above-described embodiments, and can take various forms based on the spirit of the present invention.

[0021]

As described above, according to the grommet seal inspection method and seal inspection device of the present invention described above, it is possible to eliminate the need for a large-sized air tank or water storage tank which has been conventionally required. In addition, the amount of water used for pouring into the water storage cup is extremely small compared to the conventional seal inspection device that uses a water storage tank, eliminating the need for a large-scale water supply means and draining water by simply tilting the wire harness together with the water storage cup. It can be done and has excellent workability. Therefore, the device configuration becomes compact, and the sealability of the grommet can be efficiently inspected in a short time, so that the seal inspection can be performed in accordance with the tact in the manufacturing process of the wire harness W / H.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a grommet seal inspection device according to an embodiment of the present invention.

FIG. 2 is a partially cutaway exploded perspective view of the water storage cup shown in FIG.

FIG. 3 is a schematic configuration diagram of a main part of a conventional grommet seal inspection device.

[Explanation of symbols]

20 Grommet 20a Wire penetration part 20b Wire harness penetration 20c body 15 Wire harness penetration area 21 Seal inspection device 22 Water storage cup 27 Air supply pipe 28 Wire exposed part 40 Tightening band (tightening member) 41 Regulator (air supply means) 42 Air compressor (air supply means) W / H wire harness

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 2G067 AA23 BB04 CC00 DD02 DD15                 5G333 AA09 AB16 AB28 CB00 CB17                       CC04                 5G363 AA01 AA03 BA02 CB08 DC02

Claims (3)

[Claims] 1. A seal inspection method for inspecting a sealed state of a wire harness penetrating portion in a grommet penetrating a wire harness, wherein a water storage cup is liquid-tightly attached to an outer periphery of the wire harness penetrating portion, Between the wire exposed portion and the inner periphery of the wire penetrating portion that is formed on the opposite side of the wire harness penetrating portion with the main body of the grommet interposed between the wire exposed portion and the wire exposed portion of the wire harness. After inserting the tip airtightly, while supplying pressurized air into the main body of the grommet through the air supply pipe, the sealed state is inspected by the presence or absence of water bubbles in the water storage cup to which water is supplied. A grommet seal inspection method characterized in that 2. A seal inspection device for inspecting a sealed state of a wire harness penetration part in a grommet penetrating a wire harness, the water storage cup being liquid-tightly attached to an outer periphery of the wire harness penetration part, The tip is inserted between the wire exposed portion and the inner periphery of the wire penetrated portion that is formed on the side opposite to the wire harness penetrated portion with the main body of the grommet interposed and penetrates the wire exposed portion of the wire harness. An air supply pipe, a tightening member that is attached to the outer periphery of the electric wire penetrating portion and airtightly tightens the electric wire penetrating portion together with the air supply pipe and the electric wire exposed portion, and the grommet of the grommet via the air supplying pipe. A grommet seal inspection device comprising: an air supply unit for supplying pressurized air into the main body. 3. The grommet seal inspection device according to claim 2, wherein the water storage cup has a split structure that can be halved along the longitudinal direction of the wire harness.