JP2010230318A - Grommet and water stop inspecting device for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To readily and accurately inspect water stop performance of a wire harness through-part in a grommet. <P>SOLUTION: A wire harness is passed through a first small-diameter tube part, a diameter expansion tube part, and a second small-diameter tube part of the grommet. A water stop treatment part is provided by filling a water stop agent into a gap of an electric wire group of the wire harness, inserted through the inside of the grommet and a space between the electric wire group and the inner circumferential surface of the grommet. A gas supply port is provided at one of the first small-diameter tube part and the second small-diameter tube part, and a gas detection port is provided at the other. An inspection gas other than air is supplied from the gas supply port, and the gas detection port can detect leakage of the inspection gas. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a grommet and a water stop inspection device thereof, and more specifically, can inspect the water stop performance of a wire harness penetrating portion in the grommet easily and with high accuracy.

  2. Description of the Related Art Conventionally, a wire harness that is routed from an engine room of an automobile to a vehicle interior is passed through the grommet, and the grommet is attached to a through hole of a vehicle body panel that partitions the engine room and the vehicle interior, thereby passing through the through hole. Protection, waterproofing, dustproofing and sound insulation from the engine compartment side to the passenger compartment.

  In the grommet, a water stop treatment is applied to the penetration portion of the wire harness by, for example, filling a gap between the wire groups of the wire harness to be passed through or a gap between the wire group and the inner peripheral surface of the grommet. . For the grommet that has penetrated the wire harness, it is necessary to inspect the water-stopping performance of the water-stop processing part that is the wire harness penetrating portion, and the applicant of the present application is disclosed in Japanese Patent Laid-Open No. 2000-241288 (Patent Document 1). Proposed water stop inspection device 1 is shown.

  That is, as shown in FIG. 5, the water stop inspection device 1 is provided with an air tank 2 and a water storage tank 3 via a partition wall 4, and the grommet 6 is locked to the through hole 5 provided in the partition wall 4. The recess 6 a is fitted and the grommet 6 is attached, and one end side of the wire harness W / H penetrated through the grommet 6 is accommodated in the air tank 2 and the other end side is accommodated in the water storage tank 3. When pressurized air is supplied into the air tank 2 kept in an airtight state and water is supplied into the water storage tank 3 so that the other end side of the grommet 6 and the wire harness W / H is submerged, it is a wire harness penetration portion. When the water stop performance of the water stop processing unit 7 is insufficient, the pressurized air in the air tank 2 leaks into the water storage tank 3 through the water stop defective portion and floats as bubbles. That is, whether the water stop processing unit 7 is in a good or bad state can be determined based on the presence or absence of bubbles in the water storage tank 3.

  However, according to the said structure, the process of submerging a part of grommet 6 and wire harness W / H and the process of removing the water | moisture content adhering to wire harness W / H etc. are required in order to prevent a rust, corrosion, etc. after an inspection. There is a problem that the inspection process becomes complicated.

JP 2000-241288 A

  This invention is made | formed in view of the said problem, and makes it the subject to enable it to test | inspect the water stop performance of the wire harness penetration part in a grommet simply and with high precision.

In order to solve the above-described problem, the first invention provides a first small-diameter cylindrical portion that allows a wire harness to be in close contact therewith, a large-diameter cylindrical portion that is continuous with the first small-diameter cylindrical portion, and a large size of the large-diameter cylindrical portion. A vehicle body locking recess provided annularly on the outer peripheral surface on the diameter side, a closing wall projecting from the inner peripheral surface on the large diameter end side of the enlarged diameter cylindrical portion, and a diametrical slit provided in the center of the closing wall And a grommet including a semicircular notch that forms a wire harness insertion hole provided opposite to the central portion of the slit, and a half-shaped second small-diameter cylindrical portion that protrudes from the periphery of the semicircular notch Because
The wire harness is passed through the first small-diameter cylindrical portion, the large-diameter cylindrical portion, and the second small-diameter cylindrical portion of the grommet, and the gap between the electric wire group and the electric wire group are inserted into the large-diameter cylindrical portion of the wire harness that passes through the grommet. A water-stopping agent is provided between the inner peripheral surface of the grommet and a water-stopper is provided.
A gas supply port is provided in one of the first small diameter cylindrical portion and the second small diameter cylindrical portion and a gas detection port is provided in the other,
A grommet is provided in which inspection gas other than air is introduced from the gas supply port, and leakage of the inspection gas can be detected by the gas detection port.

  As described above, a gas supply port for introducing an inspection gas other than air is provided in one of the first small-diameter cylindrical portion and the second small-diameter cylindrical portion of the grommet, and the gas detection port is provided on the other to provide the inspection. It is set as the structure which can detect the leak of industrial gas. Therefore, if the water harness penetrating portion of the wire harness arranged between the gas supply port and the gas detection port, that is, the water stop state of the water stop processing portion of the grommet is insufficient, the gas supply port is introduced. The inspection gas thus leaked leaks to the gas detection port side through the water stop defective portion of the water stop processing section, and the leaked inspection gas is detected at the gas detection port, thereby determining the water stop failure. be able to.

  In particular, in the present invention, since the gas supply port and the gas detection port are provided in the small-diameter cylindrical portions on both sides of the grommet, the inspection gas leaked to the small-diameter cylindrical portion on the gas detection port side due to poor water stoppage of the water stop processing portion. Can be detected by letting them all flow into the gas detection port without any other flow. That is, highly sensitive gas leak detection is possible with a small amount of inspection gas, and the water stop state of the water stop treatment part of the grommet can be inspected with high accuracy. In addition, it is not necessary to submerge a part of the grommet or the wire harness for removing the water or to remove the adhering moisture as in the conventional case, so that the water stopping inspection can be simplified and the grommet can be stopped. The inspection device required for water inspection can also be reduced in size.

  As the gas supply port and the gas detection port, for example, a gas supply pipe for supplying a test gas and a suction probe for sucking a test gas are preferably formed as insertion holes that can be tightly fitted. Moreover, it is preferable that the gas supply port and the gas detection port are provided in the first small-diameter cylindrical portion or the second small-diameter cylindrical portion located outside the both ends of the water stop treatment portion. Thereby, while being able to perform a water stop test | inspection reliably throughout the water stop process part full length, the water stop performance of a water stop process part is not reduced with a gas supply port and a gas detection port.

In the water stop treatment part of the grommet, there is no limitation on the method of filling the gap between the wire groups of the wire harness to be penetrated with the water stop agent.
For example, wire groups are placed next to each other and applied so that a water-stopping agent penetrates between the wires, and the part where the water-stopping agent is applied is covered with a film, a sheet, etc. Tape may be wound.
After allowing the wire harness to pass through the grommet, the diameter-increasing cylindrical portion of the grommet may be the upper surface on the large diameter side, and a water-stopping agent may be injected into the opening on the large diameter side from above.

  It is preferable that the gas detection port is provided in the first small diameter cylindrical portion, and the gas supply port is provided in the second small diameter cylindrical portion.

  Usually, the first small-diameter cylindrical portion of the grommet is disposed in the vehicle interior, and the second small-diameter cylindrical portion is disposed in the engine room. Therefore, as described above, the gas detection port is provided in the first small-diameter cylindrical portion, and the gas supply port is provided in the second small-diameter cylindrical portion, so that the movement direction of the inspection gas can be changed in the state where the grommet is attached to the vehicle. Can be adjusted to the direction. That is, it is possible to perform a water stop inspection in accordance with an actual use state.

The second invention is a grommet water stop inspection device,
A gas supply pipe for a test gas attached in communication with the gas supply port, a pressure regulator interposed in the gas supply pipe,
A grommet water stop inspection device is provided, comprising: a suction probe attached in communication with the gas detection port; and a gas leak detector connected to the suction probe.

  As described above, since the suction probe connected to the gas leak detector is attached to the gas detection port of the grommet, it leaked to the gas detection port side through the water stop defective portion of the water stop processing portion of the grommet. The inspection gas is reliably sucked by the suction probe connected to the gas detection port, and the inspection gas is detected by the gas leak detector connected to the suction probe, and the amount of gas leak is also detected. Can do. That is, according to the above configuration, the water stop performance of the water stop processing unit can be quantitatively grasped based on the amount of gas leak detected by the gas leak detector on the gas detection port side, and a more accurate stop can be achieved. Water inspection can be easily performed. Further, conventional air tanks and water storage tanks are not required, and the water stop inspection device can be greatly reduced in size.

  It is preferable that one side of the grommet sandwiching the water stop treatment part is made high by the gas supplied to the gas supply port, and the other side is made low by the suction pressure introduced from the suction probe, thereby providing a pressure difference.

  As described above, the gas supply port side was introduced from the gas supply port by setting the pressure difference between the gas supply port side and the gas detection port side with a high pressure on the gas supply port side and a low pressure on the gas detection port side. The inspection gas easily leaks to the gas detection port side through the water stop defective portion of the water stop processing section, and a highly accurate water stop inspection can be performed in a short time.

  The gas introduced from the gas supply pipe is selected from helium gas, hydrogen, and the like, and the pressure difference across the water stop treatment unit is within a predetermined range.

  A storage unit in which a threshold value is set according to the relationship between the differential pressure across the water stop processing unit and the detected gas amount detected by the gas leak detector, and the water stop performance is a reference when the detected amount is equal to or greater than the threshold value. It is preferable that an evaluation device including a determination unit determined as follows and a display unit that displays when the determination unit determines that it is equal to or less than the reference is provided integrally or separately with the gas leak detector.

  By providing the evaluation device having the above-described configuration, it can be seen at a glance whether the water stop performance in the water stop processing section of the grommet satisfies the standard, and a quick water stop inspection can be performed.

  It is preferable that the wire harness is mounted on the assembly work table, and the grommet is passed through the wire harness on the assembly work table so that the water stop inspection is performed after the water stop treatment.

  Since the water stop inspection device of the present invention has a simpler structure and is smaller than the conventional inspection device, the water stop inspection can be performed on the assembly work table as described above. Therefore, the work efficiency of the still water inspection can be further increased.

  As described above, according to the first invention, a gas supply port for introducing an inspection gas other than air is provided in one of the first small diameter cylindrical portion and the second small diameter cylindrical portion of the grommet, and the other is provided in the other. Since the gas detection port is provided to detect the leakage of the inspection gas, the water stop state of the water stop processing portion of the grommet disposed between the gas supply port and the gas detection port is insufficient. In this case, the inspection gas introduced from the gas supply port leaks to the gas detection port side through the water stop defective portion of the water stop processing portion, and the leaked inspection gas is detected at the gas detection port. Thus, it is possible to determine a water stop failure.

  In particular, in the first invention, since the gas supply port and the gas detection port are provided in the small-diameter cylindrical portions on both sides of the grommet, the inspection that leaks out to the small-diameter cylindrical portion on the gas detection port side due to water stoppage failure of the water stop processing portion. It is possible to detect all the working gas by flowing into the gas detection port without causing the other to flow out. Therefore, highly sensitive gas leak detection is possible with a small amount of inspection gas, and the water stop state of the water stop treatment part of the grommet can be inspected with high accuracy. In addition, it is not necessary to submerge a part of the grommet or the wire harness for removing the water or to remove the adhering moisture as in the conventional case, so that the water stopping inspection can be simplified and the grommet can be stopped. The inspection device required for water inspection can also be reduced in size.

  According to the second invention, since the suction probe connected to the gas leak detector is attached to the gas detection port of the grommet, the gas detection port passes through the water stop defective portion of the water stop processing portion of the grommet. The inspection gas leaking out to the side is reliably sucked by the suction probe communicated with the gas detection port, and the inspection gas is detected by the gas leak detector connected to the suction probe. The amount can also be detected. That is, according to the above configuration, the water stop performance of the water stop processing unit can be quantitatively grasped based on the amount of gas leak detected by the gas leak detector on the gas detection port side, and a more accurate stop can be achieved. Water inspection can be easily performed. Further, conventional air tanks and water storage tanks are not required, and the water stop inspection device can be greatly reduced in size.

  In addition, as described above, the gas supply port side is set to a high pressure, the gas detection port side is set to a low pressure, and a pressure difference is provided between the gas supply port side and the gas detection port side, thereby introducing from the gas supply port side. It is easy for the inspection gas thus leaked to the gas detection port side through the water stop defective portion of the water stop processing section, and a highly accurate water stop inspection can be performed in a short time.

The grommet in this embodiment is shown, (A) is a schematic plan view, (B) is AA sectional drawing. It is a schematic side view which shows the closing wall of a grommet. It is a schematic sectional drawing of the water stop processing part of a grommet. It is the schematic which shows the water stop test | inspection apparatus of the grommet of this embodiment. It is a figure which shows a prior art example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show this embodiment. The grommet 10 is integrally formed of rubber or elastomer. As shown in FIGS. 1A and 1B, the first small-diameter cylindrical portion 11 is formed on the small-diameter side end of the large-diameter cylindrical portion 12 that expands in a conical shape. While projecting continuously, the vehicle body locking recess 13 is provided in an annular shape on the outer peripheral surface of the large diameter cylindrical portion 12 on the large diameter side. Further, a thin closed wall 14 is projected from the inner peripheral surface on the large diameter end side of the enlarged diameter cylindrical portion 12, and at the center of the closed wall 14, as shown in FIG. A semicircular cutout 16 is provided opposite the central portion of the slit 15. By making the semicircular cutouts 16 face each other, an insertion hole of the wire harness W / H is formed, and a half-shaped second small-diameter cylindrical portion 17 projects from the periphery of the semicircular cutout 16. Yes.

Further, an insertion hole-shaped gas detection port 18 to which the suction probe 24 is connected in communication is provided at a position closer to the outer side than the central portion of the first small diameter cylindrical portion 11. Further, an insertion hole-shaped gas supply port 19 to which a gas supply pipe 22 for inspection gas is attached is provided at a position closer to the outer side than the central portion of the second small diameter cylindrical portion 17. The gas supply port 19 is provided to introduce inspection gas other than air into the second small diameter cylindrical portion 17, and the gas detection port 18 is connected from the second small diameter cylindrical portion 17 to the first small diameter cylindrical portion 11. It is provided to detect leakage of the inspection gas.
The hole diameter of the gas detection port 18 is set to be smaller than the outer diameter of the suction probe 24 so that the suction probe 24 is inserted and tightly fitted while expanding the gas detection port 18. Similarly, the hole diameter of the gas supply port 19 is set to be smaller than the outer diameter of the gas supply pipe 22 so that the gas supply pipe 22 is inserted and tightly fitted while expanding the gas supply port 19.

The grommet 10 is penetrated by a wire harness W / H in which a gap between the electric wire groups is filled with a water-stopping agent and a line-water stop is applied. Although the filling method of the water-stopping agent is not limited, in this embodiment, the electric wire groups are arranged adjacent to each other so that the water-stopping agent S penetrates between the electric wires W in an area where the line water-stopping is necessary. After applying and covering the part to which the water-stopper S is applied with a film (not shown) and rounding into a circular cross section, the tape T is wound around the outer periphery of the electric wire group.
A silicone-based water-stopping agent is used as the water-stopping agent S. Further, the inner diameters of the first small-diameter cylindrical portion 11 and the second small-diameter cylindrical portion 17 are set smaller than the outer diameter of the wire harness W / H, and the first and second small-diameter cylindrical portions 11 and 17 are expanded with a jig while the wire is used. It passes through the harness W / H.
The outer peripheral surfaces of the wire harness W / H drawn from the tips of the first and second small diameter cylindrical portions 11 and 17 and the tips of the first and second small diameter cylindrical portions 11 and 17 are tape-wound. A gas detection port 18 and a gas supply port are provided in the first and second small diameter cylinder portions between the tape winding portion between the tip ends of the first and second small diameter cylinder portions and the wire harness W / H and the water stop treatment portion A. 19 is provided (see FIGS. 1, 3 and 4).

Hereinafter, the water stop inspection device 20 of the grommet 10 will be described.
The water stop inspection apparatus 20 shown in FIG. 4 is mounted on a wire harness assembly work table (not shown), and passes through the wire harness W / H through the grommet 10 on the assembly work table to stop as described above. After water treatment, water stop inspection is performed.
The water stop inspection apparatus 20 includes a gas supply pipe 22 for inspection gas that is attached to the gas supply port 19 of the grommet 10 and a pressure regulator 23 provided in the gas supply pipe 22. Specifically, as shown in FIG. 4, the gas supply pipe 22 connected to the gas cylinder 21 filled with the inspection gas is inserted into the insertion hole of the gas supply port 19 provided in the second small diameter cylindrical portion 17 of the grommet 10. The gas supply pipe 22 is provided with a pressure regulator 23 to control the inside of the second small-diameter cylindrical portion 17 on the gas supply port 19 side sandwiching the water stop processing portion A with positive pressure. Yes. In the present embodiment, helium gas is introduced into the gas supply port 19 as the inspection gas, and the pressure of the second small-diameter cylindrical portion 17 on the gas supply port 19 side sandwiching the water stop processing portion A is maintained at a predetermined value. ing.

Further, the water stop inspection device 20 includes a suction probe 24 attached to communicate with the gas detection port 18 of the grommet 10 and a gas leak detector 25 connected to the suction probe 24. That is, as shown in FIG. 4, the suction probe 24 connected to the gas leak detector 25 is inserted into the insertion hole of the gas detection port 18 provided in the first small diameter cylindrical portion 11 of the grommet 10 and attached. Negative pressure control is performed inside the first small-diameter cylindrical portion 11 on the gas detection port 18 side sandwiching the water stop processing portion A by suction by the suction probe 24. In the present embodiment, a negative pressure generator (not shown) is incorporated in the gas leak detector 25, and the pressure of the first small-diameter cylindrical portion 11 on the gas detection port 18 side sandwiching the water stop processing portion A is set to a predetermined value. I keep it.
As described above, the gas supply port 19 side sandwiching the water stop treatment part A is positively controlled, and the gas detection port 18 side sandwiching the water stop treatment part A is negative pressure controlled. A predetermined pressure difference is generated between the 19 side and the gas detection port 18 side.

  Furthermore, a storage unit (not shown) in which a threshold is set according to the relationship between the differential pressure across the water stop processing unit A and the detected gas amount detected by the gas leak detector 25, and a detected amount equal to or greater than the threshold. An evaluation device 26 that includes a determination unit (not shown) that determines that the water stopping performance is below the standard if there is, and a display unit (not shown) that displays that when the determination unit determines that the water stop performance is below the standard. Is connected to the gas leak detector 25.

  As described above, the gas supply port 19 for introducing the helium gas as the inspection gas is provided in the second small diameter cylindrical portion 17 of the grommet 10, and the gas detection port 18 is provided in the first small diameter cylindrical portion 11 to perform the inspection. When the water stop state of the water stop processing part A of the grommet 10 disposed between the gas supply port 19 and the gas detection port 18 is insufficient, the gas can be detected. The helium gas introduced from the supply port 19 leaks to the first small-diameter cylindrical portion 11 on the gas detection port 18 side through the water stop defective portion of the water stop processing portion A, and the leaked helium gas is detected at the gas detection port 18. By detecting it, it is possible to determine a water stop failure.

  In particular, in this embodiment, since the gas supply port 19 and the gas detection port 18 are provided in the second and first small diameter cylindrical portions 17 and 11 of the grommet 10, the gas detection port 18 is caused by a water stop failure of the water stop processing portion A. It is possible to detect all the helium gas leaked into the first small-diameter cylindrical portion 11 on the side without flowing out to the gas detection port 18. Therefore, highly sensitive gas leak detection can be performed with a small amount of helium gas, and the water stop state of the water stop processing part A of the grommet 10 can be inspected with high accuracy. Moreover, since it is not necessary to submerge a part of a grommet or a wire harness for removing the water or to remove the attached water as in the prior art, the water stopping test can be simplified.

  Further, as described above, since the suction probe 24 connected to the gas leak detector 25 is attached to the gas detection port 18 of the first small-diameter cylindrical portion 11, the gas detection port 18 side passes through the water stop defective portion. The helium gas leaked into the gas detection port 18 is reliably sucked by the suction probe 24 attached to the gas detection port 18, and the helium gas is detected by the gas leak detector 25 connected to the suction probe 24. Can be detected. That is, according to the said structure, the water stop performance of the water stop process part A can be grasped | ascertained quantitatively with the gas leak amount detected by the gas leak detector 25, and a more accurate water stop test is simplified. Can be performed. Further, the conventional air tank and water storage tank are not required, and the water stop inspection device 20 can be greatly reduced in size.

In particular, as described above, since the gas supply port 19 side is set to a high pressure while the gas detection port 18 side is set to a low pressure, a pressure difference is provided between the gas supply port 19 side and the gas detection port 18 side. The helium gas introduced from the gas supply port 19 is more likely to leak to the gas detection port 18 side through the water stop defective portion of the water stop processing section A, and a highly accurate water stop inspection can be performed in a short time. .
In order to prevent helium gas introduced from the gas supply port 19 from flowing into the enlarged diameter cylindrical portion 12 and the first small diameter cylindrical portion 11 and leaking outward from the tip of the second small diameter cylindrical portion 17, for example, Tape T may be wound between the distal end of the second small-diameter cylindrical portion 17 provided with the gas supply port 19 and the outer peripheral surface of the wire harness to make it difficult for leakage to occur from the gap between the wires. Water resin may be injected into the second small-diameter cylindrical portion 17 to fill the gaps in the wire group.

Further, by providing the evaluation device 26 that determines the water stop performance according to the relationship between the differential pressure across the water stop processing portion A and the gas amount detected by the gas leak detector 25, the water stop performance of the grommet 10 is improved. You can see at a glance whether or not the standard is met, and a quicker water stop test is possible.
Furthermore, since the water stop inspection apparatus 20 of this embodiment has a simpler structure and can be reduced in size than the conventional inspection apparatus, the water stop inspection can be performed on the assembly work table as described above. Therefore, the work efficiency of the still water inspection can be further increased.

DESCRIPTION OF SYMBOLS 10 Grommet 11 1st small diameter cylinder part 12 Wide diameter cylinder part 13 Car body latching recessed part 14 Closing wall 15 Slit 16 Semicircular notch 17 Second small diameter cylinder part 18 Gas detection port 19 Gas supply port A Water stop treatment part 20 Water stop Inspection device 21 Gas cylinder 22 Gas supply pipe 23 Pressure regulator 24 Suction probe 25 Gas leak detector 26 Evaluation device

Claims (6)

A first small-diameter cylinder portion that allows the wire harness to be in close contact therewith, an enlarged-diameter cylinder portion that is continuous with the first small-diameter cylinder portion, and a vehicle body engagement that is annularly provided on the outer peripheral surface on the large-diameter side of the enlarged-diameter cylinder portion A recess, a closing wall protruding from the inner peripheral surface on the large diameter end side of the enlarged diameter cylindrical portion, a diametrical slit provided at the center of the closing wall, and a central portion of the slit are provided. A grommet provided with a semicircular notch forming a wire harness insertion hole, and a half-shaped second small-diameter cylindrical portion protruding from the periphery of the semicircular notch,
The wire harness passes through the first small diameter cylindrical portion, the enlarged diameter cylindrical portion, and the second small diameter cylindrical portion of the grommet, and is inserted into the grommet. The water stop treatment part is provided by filling the water stop agent between
A gas supply port is provided in one of the first small diameter cylindrical portion and the second small diameter cylindrical portion and a gas detection port is provided in the other,
A grommet configured to introduce inspection gas other than air from the gas supply port and to detect leakage of the inspection gas at the gas detection port.   The grommet according to claim 1, wherein the gas detection port is provided in the first small-diameter cylindrical portion, and the gas supply port is provided in the second small-diameter cylindrical portion. A grommet water stoppage inspection apparatus according to claim 1 or 2,
A gas supply pipe for a test gas attached in communication with the gas supply port, a pressure regulator interposed in the gas supply pipe,
A grommet water stop inspection apparatus comprising: a suction probe attached in communication with the gas detection port; and a gas leak detector connected to the suction probe.   4. The pressure difference is provided on one side of the grommet with a pressure difference provided on one side of the grommet with a gas supplied to the gas supply port at a high pressure, and the other side at a low pressure with a suction pressure introduced from the suction probe. The grommet water stop inspection device described.   A storage unit in which a threshold value is set according to the relationship between the differential pressure across the water stop processing unit and the detected gas amount detected by the gas leak detector, and the water stop performance is a reference when the detected amount is equal to or greater than the threshold value. The grommet according to claim 4, wherein the grommet is provided with an evaluation device including a determination unit that is determined as follows and a display unit that displays when the determination unit determines that the reference value is equal to or less than a reference. Water stop inspection device.   6. The structure according to claim 3, wherein the wire harness is mounted on an assembly work table, and the grommet is passed through the wire harness on the assembly work table to perform a water stop test after the water stop treatment. The grommet water-stop inspection device described in 1.

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