JP2013164366A - Wire harness, grommet, grommet water-stop inspection method and grommet water-stop inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the inspection of a water-stop property without affecting water-stop property of a grommet as much as possible and even without using water.SOLUTION: A wire harness 10 includes a wire harness body part 12, and a panel mounting part 30 mountable in a mounting hole formed on a mounting panel, and is provided with a grommet 20 with a wire harness mounting hole 60 formed. A hole reaching an outer circumferential surface of the grommet 20 from a part of a water-stop part 14 or a part of the one side thereof in the wire harness mounting hole 60 is not formed, but an inspection hole 62 reaching the outer circumferential surface of the grommet 20 from a part of the other side of the water-stop part 14 in the wire harness mounting hole 60 is formed.

Description

  The present invention relates to a technique for inspecting the water stoppage of a grommet.

  The grommet is attached to the panel component while being attached to a wire harness or the like. In the place where the grommet is attached, a water stop treatment such as silicone coating is applied to the wire harness. Thereby, the approach of the water which passed through the wire harness is suppressed.

  For example, Patent Document 1 discloses a technique for inspecting water-stopping at a grommet mounting location in a wire harness.

  Patent Document 1 discloses an inspection technique using water as a conventional technique. In addition, a gas supply port is provided in the cylindrical portion protruding to one side of the grommet, a gas detection port is provided in the cylindrical portion protruding to the other side of the grommet, an inspection gas is introduced from the gas supply port, and the gas detection port is used for inspection. A technique for detecting the presence or absence of gas leakage is disclosed.

JP 2010-230318 A

  However, in the former inspection method using water, since water adheres to the grommet or the like, there arises a problem that this water needs to be removed. Also, maintenance such as water exchange is troublesome.

  On the other hand, in the latter inspection method using inspection gas, holes as ports are formed in both of the pair of cylindrical portions protruding from the grommet. For this reason, this hole itself may have some influence on the water stoppage of the grommet.

  Therefore, an object of the present invention is to make it possible to inspect water stoppage without using water without affecting the grommet water stoppage as much as possible.

  In order to solve the above-described problem, a wire harness according to a first aspect includes a wire harness main body portion including at least one electric wire, and a panel mounting portion that can be attached to an attachment hole formed in the attachment panel. A wire harness mounting hole that opens to one side and the other side of the panel mounting portion through the mounting portion is formed, and the wire harness main body portion is inserted into the wire harness mounting hole in the wire harness main body portion. A grommet to be mounted, a water stop portion is provided in a part of the wire harness main body portion that is inserted into the wire harness mounting hole, and the water stop portion of the wire harness mounting hole No hole is formed from the part or one of the parts to the outer peripheral surface of the grommet, and the water stop is out of the wire harness mounting holes. Inspection hole extending from the portion of the other side on the outer peripheral surface of the grommet is formed.

  A second aspect is the wire harness according to the first aspect, wherein the grommet includes a cylindrical part continuously provided so as to protrude to at least one of one side and the other side of the panel mounting part, The wire harness mounting hole opens outward through at least one of the one side and the other side of the panel mounting portion.

  A 3rd aspect is a wire harness which concerns on a 2nd aspect, Comprising: The said panel mounting part is formed more thickly than the said cylinder part, and the said test | inspection hole is formed in the said panel mounting part.

  A 4th aspect is a wire harness which concerns on any one 1st-3rd aspect, Comprising: An annular groove is formed so that the part in which the said inspection hole was formed among the said wire harness mounting holes may be formed. Yes.

  A 5th aspect is a wire harness as described in any one of 1st-4th, Comprising: The said water stop part is a part located in the one end part of the said wire harness mounting hole among the said wire harness main-body parts. Is provided.

  In order to solve the above-mentioned problem, a grommet according to a sixth aspect is a grommet to be attached to a wire harness main body, and includes a panel attachment portion that can be attached to an attachment hole formed in an attachment panel, and the panel attachment A wire harness mounting hole that opens to one side and the other side of the panel mounting portion through the portion is formed, and the inner surface of the wire harness mounting hole in a state where the panel mounting portion is mounted to the mounting panel Through hole extending from the wire harness mounting hole to the space on the other surface side of the mounting panel is formed.

  In order to solve the above-mentioned problem, a seventh aspect is a grommet water stop inspection method for inspecting the water stop of the grommet of the wire harness according to any one of the first to fifth aspects, wherein (a) A step of introducing gas from the opening on the other side of the water stop portion with respect to the wire harness mounting hole; and (b) a step of inspecting the leakage state of the gas in the inspection hole.

  In order to solve the above-mentioned problem, an eighth aspect is a grommet water stop inspection device for inspecting the water stoppage of the grommet of the wire harness according to any one of the first to fifth aspects, wherein the wire harness A gas introduction part that introduces gas from the opening on the other side of the water stop part with respect to the mounting hole, and a gas detection part that detects a leakage state of the gas in the inspection hole.

  A ninth aspect is a grommet water stop inspection apparatus according to the eighth aspect, wherein the gas detection unit includes a needle tube inserted into the inspection hole, and passes through the needle tube from the inspection hole. The leakage state of the gas flowing out is detected.

  According to the first aspect, by introducing gas from the opening on the other side of the water stop portion with respect to the wire harness mounting hole and inspecting the leakage state at the inspection hole, water stoppage can be achieved without using water. Can be inspected. Moreover, the hole which reaches the outer peripheral surface of the said grommet from the part of the said water stop part or the one side part among the said wire harness installation holes is not formed, and the other side of the said water stop part among the said wire harness installation holes The inspection hole from the portion to the outer peripheral surface of the grommet is formed, and the water stoppage of the grommet can be minimized.

  According to the 2nd aspect, a wire harness can fully be hold | maintained by a cylinder part.

  According to the 3rd aspect, since the test | inspection hole is formed in the panel mounting part formed in thickness, water cannot penetrate | invade into an inside through a test | inspection hole.

  According to the fourth aspect, when the gas is introduced from the opening on the other side of the water stop portion with respect to the wire harness mounting hole, and the gas reaches a portion corresponding to the inspection hole, the annular groove is formed on the entire outer periphery of the wire harness. Can leak from the inspection hole. Therefore, the inspection can be performed more accurately.

  According to the 5th aspect, it is easy to perform the said test | inspection using the part on the opposite side to the said one end part among wire harness mounting holes.

  According to the sixth aspect, the grommet is mounted on the wire harness main body in a state where the wire harness main body is inserted into the wire harness mounting hole, and the other side of the water stop portion is attached to the wire harness mounting hole. By introducing a gas from the opening and inspecting the leakage state at the inspection hole, the water stoppage can be inspected without using water. In addition, in the state where the panel mounting portion is mounted on the mounting panel, a through hole extending from the inner peripheral surface of the wire harness mounting hole to the space on the one surface side of the mounting panel is not formed. Since the inspection hole penetrating the space on the other surface side of the mounting panel is not formed, it is possible to prevent the grommet from being affected as much as possible.

  According to the seventh aspect, by introducing gas from the opening on the other side of the water stop portion with respect to the wire harness mounting hole and inspecting the leakage state at the inspection hole, water stoppage can be achieved without using water. Can be inspected. Moreover, the hole which reaches the outer peripheral surface of the said grommet from the part of the said water stop part or the one side part among the said wire harness installation holes is not formed, and the other side of the said water stop part among the said wire harness installation holes The inspection hole from the portion to the outer peripheral surface of the grommet is formed, and the water stoppage of the grommet can be minimized.

  According to the eighth aspect, by introducing gas from the opening on the other side of the water stop portion with respect to the wire harness mounting hole and inspecting the leakage state at the inspection hole, water stoppage can be achieved without using water. Can be inspected. Moreover, the hole which reaches the outer peripheral surface of the said grommet from the part of the said water stop part or the one side part among the said wire harness installation holes is not formed, and the other side of the said water stop part among the said wire harness installation holes The inspection hole from the portion to the outer peripheral surface of the grommet is formed, and the water stoppage of the grommet can be minimized.

  According to the ninth aspect, gas leakage from the inspection hole can be detected more accurately.

It is a schematic sectional drawing which shows the wire harness which concerns on embodiment. It is explanatory drawing which shows the water stop test | inspection apparatus of a grommet. It is explanatory drawing which shows the flow of the air supplied to the grommet. It is explanatory drawing which shows a needle-shaped tube and an inspection hole. It is explanatory drawing which shows a needle-shaped tube and an inspection hole.

<About wire harness>
First, the wire harness which concerns on embodiment is demonstrated. FIG. 1 is a schematic sectional view showing a wire harness 10. The wire harness 10 includes a wire harness main body 12 and a grommet 20.

  The wire harness main body 12 is configured to include at least one electric wire. Here, the wire harness main body portion 12 is configured by binding a plurality of electric wires. The wire harness main body 12 may be appropriately branched at other portions. Further, an optical cable or the like may be provided along the wire harness main body 12.

  Moreover, the water stop part 14 is provided in a part of longitudinal direction of the wire harness main-body part 12. As shown in FIG. The water stop part 14 is a part which suppresses the penetration | invasion of the water which passed between the electric wires which comprise the wire harness main-body part 12, and between the wire harness main-body part 12 and the wire harness mounting hole 60 mentioned later. For example, the water stop portion 14 is formed by applying a water stop agent such as silicone on a part of the wire harness body portion 12 in the longitudinal direction and winding an elastic sheet such as a foam sheet around the outer periphery. In this water stop part 14, the said water stop agent is sealed with the elastic sheet in a part of longitudinal direction of the wire harness main-body part 12, and water stop between each electric wire is performed. Moreover, since the water-stopping agent is interposed between the outer periphery of the wire bundle and the elastic sheet, the water-stopping agent and the elastic sheet provide a space between the wire harness main body 12 and the inner peripheral surface of the wire harness mounting hole 60. Infiltration of water that has passed through is also suppressed.

  Here, the water stop part 14 is a part located in the one end part of the wire harness mounting hole 60 in the wire harness main body part 12, more specifically, a part disposed in the first tube part 40 described later. It is assumed that it will be provided.

  The grommet 20 is a member attached to the mounting panel 100 provided on the vehicle body. Here, description will be made assuming the mounting panel 100 that separates the engine room and the vehicle compartment. A mounting hole 102 is formed in the mounting panel 100. Here, the mounting hole 102 is formed in a circular hole, but may have another shape such as an ellipse. An annular projection 103 is formed on the peripheral edge of the mounting hole 102. The annular protrusion 103 normally protrudes toward the engine room. That is, in FIG. 1, the right side of the mounting panel 100 is the engine room side, and the left side of the mounting panel 100 is the vehicle compartment side.

  The grommet 20 is attached to a portion of the wire harness main body 12 that passes through the attachment hole 102 and is attached and fixed to the attachment hole 102. In other words, the grommet 20 is attached to the wire harness main body 12, and the wire harness main body 12 is routed to the vehicle compartment side and the engine room side through the grommet 20 fixedly attached to the attachment hole 102. The The grommet 20 protects the wire harness main body 12 at a portion where the wire harness main body 12 passes through the mounting hole 102 and also has a role of stopping water from the engine room to the vehicle compartment.

  The grommet 20 includes a panel mounting portion 30, a first tube portion 40, and a second tube portion 50, and the whole is integrally formed of an elastic material such as an elastomer (rubber or the like). That is, the panel mounting part 30, the first cylinder part 40, and the second cylinder part 50 are integrally molded by an injection mold or the like.

  The panel mounting portion 30 is formed in an annular shape having an outer diameter that is larger (slightly larger) than the inner diameter of the mounting hole 102. More specifically, the panel mounting portion 30 is formed in a truncated cone shape by cutting off the apex portion of the cone. An annular recess 32 into which the peripheral edge of the mounting hole 102 is fitted is formed on the outer periphery of the panel mounting portion 30. Here, the peripheral edge portion of the mounting hole 102 is formed in a shape that rises on one side (engine room side) of the mounting panel 100. In accordance with this shape, the annular recess 32 is bent at the portion 32a facing the inner periphery from the outer periphery of the panel mounting portion 30 and the inner peripheral side tip portion of the portion 32a, and is axially one side of the panel mounting portion 30 (engine room). Side portion 32b, that is, the longitudinal section of the surface of the panel mounting portion 30 along the axial direction is L-shaped.

  In addition, an annular relief groove 34 is formed on the inner peripheral side of the annular recess 32 in the panel mounting portion 30, which is recessed from the one main surface (bottom side when viewed as a truncated cone shape) side of the panel mounting portion 30 to the opposite side. Has been. Accordingly, when the panel mounting portion 30 is mounted in the mounting hole 102, the outer peripheral portion of the panel mounting portion 30 is attached by elastically deforming the outer peripheral portion of the panel mounting portion 30 so that the annular relief groove 34 is narrowed. Arranged in the hole 102, the peripheral edge of the mounting hole 102 can be easily fitted into the annular recess 32.

  A first tube portion 40 is continuously provided as a tube portion so as to protrude toward the one side in the axial direction with respect to the panel mounting portion 30. Further, a second cylinder part 50 as a cylinder part is continuously provided so as to protrude to the other side in the axial direction with respect to the panel mounting part 30.

  The 1st cylinder part 40 and the 2nd cylinder part 50 are formed in the cylinder shape which can penetrate the wire harness main-body part 12. As shown in FIG.

  Here, a wire harness mounting hole 60 extending from the first tube portion 40 through the panel mounting portion 30 to the second tube portion 50 is formed. The wire harness mounting hole 60 has an inner diameter (same as or slightly smaller than the outer diameter of the wire harness main body 12) corresponding to the outer diameter of the wire harness main body 12 to be inserted. And the wire harness main-body part 12 is penetrated by this wire harness mounting hole 60 in the state by which the wire harness mounting hole 60 was expanded. Accordingly, the wire harness body 12 is inserted and held in a state where the wire harness body 12 is tightened.

  In the present embodiment, the wire harness mounting hole 60 is formed in a hole shape in which the same-diameter portion continues over the entire axial direction. Therefore, the panel mounting part 30 is formed thicker than the first cylinder part 40 and the second cylinder part 50. But the panel mounting part 30 is formed in hollow shape, and the part of the panel mounting part 30 among the wire harness mounting holes is formed in the space shape which spreads larger than the part of the 1st cylinder part 40 and the 2nd cylinder part 50. May be.

  One or both of the first cylinder part 40 and the second cylinder part 50 may be omitted. In particular, in this embodiment, since the water stop part 14 is arrange | positioned in the 1st cylinder part 40 and the water stop is aimed at, there is no problem even if the 2nd cylinder part 50 is abbreviate | omitted. Further, when the first tube portion 40 is omitted, the water stop portion 14 is disposed at a position closer to the panel mounting portion 40, and the water stop portion is located in the vicinity of the opening on the one side in the axial direction of the panel mounting portion 40. What is necessary is just to plan water stop between 14 and the wire harness mounting | wearing hole 60. FIG.

  In addition, an inspection hole 62 extending from the other side portion of the wire harness mounting hole 60 where the water stop portion 14 is provided to the outer peripheral surface of the grommet 20 is formed. Here, since the water stop part 14 is provided in the 1st cylinder part 40, the test | inspection hole 62 is the outer peripheral surface of the grommet 20 from the inner peripheral part of the panel mounting part 30 and the 2nd cylinder part 50 among the wire harness mounting holes 60. It suffices if it is formed so as to reach. Here, the inspection hole 62 is formed in the panel mounting part 30 so as to extend from the inner peripheral part of the panel mounting part 30 to the outer peripheral surface of the panel mounting part 30 in the wire harness mounting hole 60. Therefore, the inspection hole 62 is formed so as to penetrate the inside and outside of the panel mounting portion 30 formed to be relatively thick.

  Here, the inspection hole 62 inspects the state of the gas passing through the inspection hole 62 from the opening on the other side of the water stopping part 14 in the wire harness mounting hole 60, as will be described later. It is provided for the purpose of inspecting waterstop. Here, in the state where the grommet 20 is attached to the attachment panel 100, it is only necessary that the water stoppage is obtained when viewed from the other surface side (indoor side) of the attachment panel 100. Therefore, the inspection hole 62 is the outer peripheral surface of the grommet 20 on the other surface side of the mounting panel 100 (opposite to the location where the water stop portion 14 is disposed) in a state where the panel mounting portion 30 is attached to the mounting panel 100. Side), that is, the outer peripheral surface of the grommet 20 is formed so as to reach the other side of the annular recess 32.

  On the other hand, no hole is formed in the wire harness mounting hole 60 from the portion where the water stop portion 14 is provided, or from the other side portion to the outer peripheral surface of the grommet 20. Here, since the water stop part 14 is provided in the 1st cylinder part 40, the hole penetrated from the inner peripheral surface to the outer peripheral surface is not formed in the 1st cylinder part 40.

  Similarly to the above, when the grommet 20 is attached to the attachment panel 100, the panel mounting portion 30 may be formed from the viewpoint that water stoppage is obtained as viewed from one side (engine room side) of the attachment panel 100. In a state of being mounted on the mounting panel 100, from the inner peripheral surface of the wire harness mounting hole 60 to the outer peripheral surface of the grommet 20 and on one side of the mounting panel 100 (where the water stop portion 14 is disposed), that is, the grommet 20. A through hole reaching one portion of the outer peripheral surface from the annular recess 32 is not formed.

  Further, an annular groove 64 is formed in the wire harness mounting hole 60 so as to pass through a portion where the inspection hole 62 is formed. Therefore, the inspection hole 62 is opened toward the wire harness mounting hole 60 by the annular groove 64. This annular groove 64 is not essential.

  The grommet 20 is attached to the wire harness body 12 in a state where the wire harness body 12 is inserted into the wire harness attachment hole 60. At this time, as described above, the water stop portion 14 is disposed in the first tube portion 40. Further, in the portion of the wire harness mounting hole 60 where the wire harness mounting hole 60 and the second cylindrical portion 50 are formed, the water stop portion 14 is not formed, and gas can be injected through the wire harness main body portion 12. .

<About grommet water stop inspection method and grommet water stop inspection device>
A technique for inspecting the water stoppage of the grommet 20 will be described. First, a grommet water stop inspection device will be described. FIG. 2 is an explanatory view showing the water stop inspection device 70 of the grommet 20.

  The water stop inspection device 70 includes a gas introduction part 72 that introduces gas from the opening on the other side of the water stop part 14 (opening on the second tube part 50 side) with respect to the wire harness mounting hole 60, and an inspection hole 62. And a gas detector 80 for detecting a gas leakage state.

  The gas introduction unit 72 includes a case unit 74, an air supply source 76, and a first atmospheric pressure detection unit 78.

  The case portion 74 is a container capable of sealing gas (here, air), and an attachment hole 75 similar to the attachment hole 102 is formed on one main surface (here, the upper surface). Then, the grommet 20 attached to the wire harness main body 12 is attached to the mounting hole in the state in which the opening into which the gas is introduced in the wire harness attachment hole 60, that is, the second cylindrical part 50 is disposed in the case part 74. 75 can be attached.

  Further, the case portion 74 is provided with pipes 74a and 74b penetrating the inside and outside. An air supply source 76 is connected to the one pipe 74a. As the air supply source 76, a compressed air cylinder, an air compressor, or the like can be used. The air supplied from the air supply source 76 is supplied into the case portion 74. A first atmospheric pressure detector 78 is connected to the other pipe 74b. The first atmospheric pressure detector 78 detects the atmospheric pressure in the case portion 74.

  The gas detection unit 80 includes a needle tube 82, a gas relay unit 84, and a second atmospheric pressure detection unit 86.

  The needle-like tube 82 is a tubular member formed of metal, resin, or the like, and it is preferable that the distal end portion is sharply cut or the like.

  The gas relay part 84 includes a relay pipe 84a provided so as to penetrate the inside and outside of the case part 74, and tubes 84b and 84c connected to both ends thereof. The tubes 84b and 84c are bendable tubular members formed of rubber tubes or the like. One end of the tube 84 b is connected to the relay tube 84 a in the case portion 74, and the other end of the tube 84 b is connected to the needle tube 82. Then, before attaching the grommet 20 to the attachment hole 75, the needle tube 82 connected to the other end of the tube 84 b is inserted into the inspection hole 62, and then the grommet 20 is attached to the attachment hole 75. it can. One end of the tube 84 c is connected to the relay pipe 84 a outside the case portion 74, and the other end of the tube 84 c is connected to the second atmospheric pressure detection unit 86. Thereby, the gas leaking from the inspection hole 62 flows out to the second atmospheric pressure detection unit 86 through the needle tube 82 and the gas relay unit 84. Accordingly, the second atmospheric pressure detection unit 86 can detect the atmospheric pressure of the inspection hole 62 as a gas leakage state of the inspection hole 62.

  The water stop inspection method for the grommet 20 will be described.

  First, the grommet 20 attached to the wire harness main body 12 is prepared, and the needle tube 82 is inserted into the inspection hole 62. At this time, it is preferable to reach the position immediately before the outer periphery of the wire harness body 12 so that the tip of the needle tube 82 does not contact the wire harness body 12.

  Thereafter, the grommet 20 is attached to the attachment hole 75. Then, air is supplied from the air supply source 76 into the case portion 74. Thereby, air is introduced from the opening on the other side of the water stop part 14 (that is, the opening of the second cylinder part 50) with respect to the wire harness mounting hole 60. This air flows along the longitudinal direction of the wire harness main body 12 through the wire harness main body 12 and the inner peripheral surfaces of the wire harness mounting holes 60 and between the wires constituting the wire harness main body 12. As shown in FIG. 3, air flows into the inspection hole 62 directly or via the annular groove 64 at the portion of the wire harness mounting hole 60 where the annular groove 64 is formed, from which the needle tube 82, and flows out to the second atmospheric pressure detection unit 86 through the gas relay unit 84.

  Then, the state of gas leakage in the inspection hole 62 is inspected by comparing the atmospheric pressure detected by the first atmospheric pressure detection unit 78 with the atmospheric pressure of the air supplied by the air supply source 76.

  That is, when there is no gas leakage in the water stop portion 14, the air supplied into the case portion 74 passes through the needle tube 82 and the gas relay portion 84 from the inspection hole 62 without leaking from the outside of the case portion 74. It flows out to the 2 atm detector 86. For this reason, the pressure of the supplied air should be the same as the pressure detected by the second pressure detector 86.

  On the other hand, when gas leaks in the water stop part 14 due to poor application of silicone or the like, the air supplied into the case part 74 leaks out of the case part 74 through the water stop part 14. For this reason, the atmospheric pressure detected by the second atmospheric pressure detector 86 should be lower than the atmospheric pressure of the supplied air.

  For this reason, the atmospheric pressure of the supplied air and the atmospheric pressure detected by the second atmospheric pressure detection unit 86 are compared, and if both are the same, the water-stopping part 14 also has good water-stopping (pass inspection), both If they are different, it can be determined that the waterstop is poor (failed).

  The second atmospheric pressure detection unit 86 is provided for the purpose of avoiding problems due to air leakage between the grommet 20 and the mounting hole 75. That is, when air leakage occurs between the grommet 20 and the mounting hole 75 due to poor mounting of the grommet 20, the atmospheric pressure at the second atmospheric pressure detection unit 86 is higher than the atmospheric pressure of the supplied air. Lower. In such a case, it is possible to suppress erroneous determination by confirming the mounting state of the grommet 20 or by performing the above operation after mounting again.

  According to the wire harness 10, the grommet 20, the water stop inspection method, and the water stop inspection device 70 configured as described above, the second tube portion 50 that is the other side opening of the water stop portion 14 with respect to the wire harness mounting hole 60. By introducing gas from the opening of the gas and inspecting the leakage state in the inspection hole 62, the water-stopping property of the grommet 20 can be inspected without using water. In addition, the wire harness mounting hole 60 on the other side of the water stop portion 14 in the wire harness mounting hole 60 and the inner peripheral surface portion of the second cylindrical portion 50, and the other of the mounting panel 100 on the outer peripheral surface of the grommet 20. An inspection hole 62 is formed in a portion reaching the direction side, and a through-hole is formed in a portion of the wire harness mounting hole 60 that reaches the outer peripheral surface of the water stop portion 14 and further from one side thereof. Absent. For this reason, it is not necessary to form a hole from the inner peripheral surface of the wire harness mounting hole 60 to the outside at the location where the water stop portion 14 is provided in the grommet 20. It is possible to prevent the water from being affected as much as possible.

  In particular, in the inspection using water, in order to suppress defects due to the water adhering to each part, the work of removing water by blowing high-pressure air after the inspection becomes unnecessary. Further, in the inspection using water, it is necessary to visually inspect for the presence or absence of water bubbles, and it is necessary to be careful not to overlook with small water bubbles. In order to make small water bubbles easy to see, a method is considered in which the periphery of the grommet is made as simple as possible at the inspection stage, and the tape is wound around the grommet and a protective material is attached after the inspection. However, in this inspection, since it is only necessary to detect the atmospheric pressure, a more reliable water stop inspection can be performed without adopting such a method. Further, in the inspection using water, operations such as injection and replacement of water are necessary, but in the present inspection, such operations are also unnecessary.

  Further, since the annular groove 64 is formed in the portion of the wire harness mounting hole 60 where the inspection hole 62 is formed, the air that reaches the portion corresponding to the inspection hole 62 through the wire harness main body 12 In the annular groove 64, the wire harness main body 12 can be passed around to reach the inspection hole 62 and leak out from the inspection hole 62. For this reason, the air which passed the wire harness main-body part 12 can be more reliably leaked from the test | inspection hole 62, and a test | inspection can be performed more reliably.

  Moreover, since the inspection hole 62 is formed in the thick panel mounting part 30, the length of the inspection hole 62 can be increased. For this reason, even if condensation or the like occurs on the outer peripheral surface of the grommet 20 due to condensation or the like, the water hardly enters the grommet 20.

  As shown in FIGS. 4 and 5, the outer diameter of the needle tube 82 is set smaller than the inner diameter of the inspection hole 62, and the needle tube 82 is inserted into the inspection hole 62 while expanding the inspection hole 62. It is preferable. When the needle tube 82 is pulled out, the inspection hole 62 is preferably contracted to the original inner diameter by the elastic restoring force of the grommet 20. Thereby, the infiltration of water through the inspection hole 62 can be more reliably suppressed. The inspection hole 62 may be a small hole that is blocked by the elastic restoring force of the grommet 20 when the needle tube 82 is pulled out.

  In order to suppress the intrusion of water through the inspection hole 62, the location where the inspection hole 62 is provided is preferably a portion of the grommet 20 that is disposed on the vehicle compartment side.

  However, since the water stoppage is performed by the waterstop portion 14, the water stoppage on both sides of the mounting panel 100 is obtained. For this reason, it is not essential to consider the intrusion of water via the inspection hole 62.

  Moreover, since the water stop part 14 is arrange | positioned at the one end part of the wire harness mounting hole 60, the whole part on the opposite side to the said one end part in the wire harness mounting hole 60, especially panel mounting part 30 grade | etc., Are utilized. Thus, the inspection can be easily performed by forming the inspection hole 62 or the like.

  In addition, since the needle-like tube 82 is inserted into the inspection hole 62 to detect a gas leak in the inspection hole 62, the gas leakage from the inspection hole 62 can be detected more reliably.

  As described above, the present invention has been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Wire harness 12 Wire harness main-body part 14 Water stop part 20 Grommet 30 Panel mounting part 40 1st cylinder part 50 2nd cylinder part 60 Wire harness installation hole 62 Inspection hole 64 Annular groove 70 Water stop inspection apparatus 72 Gas introduction part 74 Case Unit 76 air supply source 80 gas detection unit 82 needle tube 86 second atmospheric pressure detection unit

Claims (9)

A wire harness body including at least one electric wire;
A wire harness mounting hole that includes a panel mounting portion that can be mounted in a mounting hole formed in the mounting panel and that opens to one side and the other side of the panel mounting portion through the panel mounting portion is formed. A grommet that is attached to the wire harness body in a state where the wire harness body is inserted into the hole;
With
A water stop portion is provided in a part of the wire harness main body portion inserted into the wire harness mounting hole,
Of the wire harness mounting hole, a hole from the part of the water stop part or one part thereof to the outer peripheral surface of the grommet is not formed, and the part of the wire harness mounting hole on the other side of the water stop part A wire harness in which an inspection hole extending from the outer periphery of the grommet is formed. The wire harness according to claim 1,
The grommet includes a cylindrical portion continuously provided so as to protrude to at least one of the one side and the other side of the panel mounting portion,
The wire harness mounting hole is a wire harness that opens to the outside through the inside of the tubular portion on at least one of one side and the other side of the panel mounting portion. The wire harness according to claim 2,
The wire harness in which the panel mounting part is formed thicker than the cylinder part, and the inspection hole is formed in the panel mounting part. It is a wire harness as described in any one of Claims 1-3,
A wire harness in which an annular groove is formed so as to pass through a portion of the wire harness mounting hole where the inspection hole is formed. It is a wire harness as described in any one of Claims 1-4, Comprising:
The said water stop part is a wire harness provided in the part located in the one end part of the said wire harness mounting hole among the said wire harness main-body parts. A grommet attached to the wire harness body,
With a panel mounting part that can be attached to the mounting hole formed in the mounting panel,
A wire harness mounting hole is formed that opens on one side and the other side of the panel mounting portion through the panel mounting portion,
In the state where the panel mounting portion is mounted on the mounting panel, a through hole extending from the inner peripheral surface of the wire harness mounting hole to the space on the one surface side of the mounting panel is not formed, and the mounting from the wire harness mounting hole is performed. A grommet in which an inspection hole penetrating the space on the other surface side of the panel is formed. A grommet water stop inspection method for inspecting the water stop of the grommet of the wire harness according to any one of claims 1 to 5,
(A) introducing gas from the opening on the other side of the water stop portion with respect to the wire harness mounting hole;
(B) inspecting the leakage state of the gas in the inspection hole;
A grommet still water inspection method comprising: A grommet water stop inspection device for inspecting the water stoppage of the grommet of the wire harness according to any one of claims 1 to 5,
A gas introduction part for introducing gas from the opening on the other side of the water stop part with respect to the wire harness mounting hole;
A gas detection unit for detecting a leakage state of the gas in the inspection hole;
Grommet water stop inspection device. A grommet water stop inspection device according to claim 8,
The grommet water stop inspection apparatus, wherein the gas detection unit includes a needle tube inserted into the inspection hole and detects a leakage state of the gas flowing out from the inspection hole through the needle tube.

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