JP4668650B2 - Waterproof grommet mounting structure - Google Patents

Description

  The present invention relates to a waterproof grommet mounting structure that is used, for example, when wiring an electric wire, a washer hose, or the like on a back door or the like of an automobile, for closing the wiring opening and waterproofing.

  FIG. 6 shows one form of a conventional waterproof grommet mounting structure (see, for example, Patent Document 1).

  The waterproof grommet 41 is made of synthetic rubber, and fixes one connector 42 on the inner side, and performs fitting connection with the other connector 44 fixed to the vehicle panel 43 in the direction of the arrow while The hole 45 is closed and waterproofed, has a seal lip 46 at the front end, has a circumferential groove for fitting the flange 47 of one connector 42 on the rear side of the seal lip 46, and is rearward from the circumferential groove. The taper portion 48 is continuous with a small-diameter bellows-like flexible tube portion 49 for inserting the electric wire on the rear end side.

  One connector 42 is composed of a connector housing 50 made of synthetic resin and female terminals 61 with electric wires accommodated in a terminal accommodating chamber in the connector housing, and a flange 47 is fitted to the connector housing 50.

  The other connector 44 is composed of a connector housing 62 made of synthetic resin and a male terminal 63 with an electric wire accommodated in the connector housing. The connector housing 62 has locking arms 64 on both sides of the locking arm 64. A rear stop wall 65, the peripheral edge of the hole 45 of the panel 43 is engaged between the locking arm 64 and the stop wall 65, and the other connector 44 is locked to the panel 43. Yes. The other connector 44 functions as a so-called standby connector.

  FIG. 7 shows a waterproof grommet 51 in which a washer hose 52 for supplying door window cleaning liquid is integrally formed on a grommet body made of synthetic rubber (see Patent Document 2).

  The washer hose portion 52 is formed to bulge on the inner surface of the hole 56 between the fitting portions 53 and 54 at both ends of the grommet main body 57 and the intermediate flexible cylindrical portion 55, and continues over the entire length of the grommet main body 57. An external washer hose 59 is connected to the hose portion openings 52a and 52b of the fitting portions 53 and 54 via pipe-shaped joint couplers 58, respectively. The wire harness 60 is inserted into the hole 56.

  When the washer hose portion 52 is not integrated with the grommet main body 57, a separate washer hose is inserted into the harness insertion hole of the grommet main body 57.

  In FIG. 8, a waterproof grommet 67 with a built-in washer hose 66 is attached to a panel 68 of a vehicle, and a connector (not shown) on the waterproof grommet 67 side is fitted and connected to a standby connector 70 in a panel hole 69. The other form of the attachment structure of a waterproof grommet is shown.

  The washer hose 66 may be integral with or separate from the waterproof grommet 67. The washer hose 66 is introduced into the panel hole 69 outside the flange 71 of the standby connector 70. The waterproof grommet 67 includes a bellows-like flexible cylindrical portion 72 (only a part of which is shown in the figure) and a flange portion 73 formed integrally with the end portion of the flexible cylindrical portion 72. Has a sealing lip (not shown) that comes into close contact with the sealing surface 74 indicated by hatching of the panel 68. By fitting both the connectors, the flange 73 of the waterproof grommet 67 is pressed and brought into close contact with the seal surface 74 of the panel 68.

The washer hose 66 connects, for example, a washer nozzle of a vehicle back door and a washer tank on the vehicle body side, and a panel 68 is a panel of the back door, and the other flange (following the flexible cylindrical portion 72 of the waterproof grommet 67) (Not shown) is fitted in a hole of a panel (not shown) on the vehicle body side.
JP-A-10-233262 (FIG. 10) Japanese Utility Model Publication No. 4-105423 (FIG. 1)

  However, in the waterproof grommet mounting structure shown in FIG. 8, in the unlikely event that water leaks from the washer hose 66, there is a concern that water may enter the connector and cause a short circuit of the terminal. there were. In addition, when the standby connector 70 and the washer hose 66 are positioned substantially in parallel in the panel hole 69, when the standby connector 70 is arranged eccentrically in the panel hole, the waterproof grommet 67 on the side opposite to the eccentricity is provided. There was also a problem that the pressing force (adhesion force) between the collar portion 73 and the panel 68 was lowered, and the waterproofness was lowered.

  In view of the above points, the present invention can reliably seal the connector even if water is leaked from the washer hose so that the connector is not adversely affected, and the connector is arranged eccentrically in the panel hole. However, it is an object of the present invention to provide a waterproof grommet mounting structure that can reliably seal without causing deterioration in adhesion, and that can improve the sealing performance as a whole.

In order to achieve the above object, a waterproof grommet mounting structure according to claim 1 of the present invention includes a connector and an elastic fluid hose disposed on an elastic waterproof grommet, a mating connector disposed on a panel, and the fluid. In a waterproof grommet mounting structure in which a hose is inserted and both connectors are fitted to closely attach the flange portion of the waterproof grommet to the panel, a first hole portion through which the mating connector is inserted into the panel, and the fluid hose in parallel and a second hole for inserting the provided Rutotomoni, a partition wall is formed between the two holes, the fluid hose, the locking portion is provided for said second hole portion, of the waterproof grommet With the flange closely attached to the periphery of both hole parts including the partition wall , the tensile force acts on the fluid hose in a state where the locking part is locked to the second hole part. Press the buttocks against the panel with force And characterized in that.

  With the above configuration, the waterproof grommet side connector is fitted to the mating connector on the panel side, and at the same time, the flange portion of the waterproof grommet is in close contact with the peripheral edges (surfaces) of the two hole portions of the panel. Seal independently. Thereby, even if there is a water leak from the fluid hose, water is retained in the second hole, and water can be prevented from entering the connector in the first hole.

The connector fitting and at the same time, or after the connector fitting is engaged with the second hole portion of the engaging portion of the fluid hose panel, a state in which the fluid hose is pulled toward the panel surface. This state is achieved, for example, by means such as setting the length of the hose in the free state from the collar part to the locking part of the waterproof grommet shorter than the distance from the collar part to the panel surface. The elastic fluid hose is made of synthetic rubber or flexible synthetic resin. The flange of the waterproof grommet is urged toward the panel by the tensile force of the fluid hose, and the flange closely contacts the panel surface by the force. In many cases, the connector is arranged eccentrically in the collar, and in this case, the adhesion between the collar and the panel tends to be weak on the side opposite to the eccentric direction of the connector. The

The waterproof grommet mounting structure according to claim 2 is configured such that a connector and an elastic fluid hose are disposed on an elastic waterproof grommet, a mating connector is disposed on the panel, the fluid hose is inserted, and both connectors are fitted. In the waterproof grommet mounting structure in which the flange portion of the waterproof grommet is in close contact with the panel, the fluid hose is provided with a locking portion for the panel, and the locking portion is locked to the panel. A tensile force is applied to the fluid hose, and the flange is pressed against the panel by the tensile force.

  With the above configuration, the locking portion of the fluid hose is locked to the panel simultaneously with the connector fitting or after the connector fitting, and the fluid hose is pulled toward the panel surface. This state is achieved, for example, by means such as setting the length of the hose in the free state from the collar part to the locking part of the waterproof grommet shorter than the distance from the collar part to the panel surface. The elastic fluid hose is made of synthetic rubber or flexible synthetic resin. The flange of the waterproof grommet is urged toward the panel by the tensile force of the fluid hose, and the flange closely contacts the panel surface by the force. In many cases, the connector is arranged eccentrically in the collar, and in this case, the adhesion between the collar and the panel tends to be weak on the side opposite to the eccentric direction of the connector. The

The waterproof grommet mounting structure according to claim 3 is the waterproof grommet mounting structure according to claim 1 or 2 , wherein the locking portion includes a small-diameter projection for insertion into the hole of the panel and a groove and a stop. It is characterized by comprising a large-diameter protrusion.

  With the above configuration, by inserting and pulling the fluid hose through the hole of the panel, the small-diameter protrusion on the front side of the locking part passes while being press-fitted into the hole, and the intermediate groove engages with the hole. In this state, the large-diameter portion on the rear side comes into contact with the panel and prevents further movement. Thereby, the locking portion is securely locked (fixed) to the panel.

The waterproof grommet mounting structure according to claim 4 is the waterproof grommet mounting structure according to any one of claims 1 to 3 , wherein the fluid hose is formed integrally with the waterproof grommet.

  With the above configuration, the fluid hose is not displaced with respect to the waterproof grommet, so that the operation of inserting the fluid hose into the hole of the panel is facilitated. Further, when the fluid hose receives a tensile force, the force is surely received and the collar portion of the waterproof grommet is securely pressed (contacted) to the panel surface. When the fluid hose is a separate body, a fixing means to the waterproof grommet is necessary, but when it is integral, it is not necessary.

As described above, according to the first aspect of the present invention, the flange portion of the waterproof grommet is in close contact with the peripheral edges of the two hole portions of the panel, and the fluid hose and the connector are independently sealed. Even if there is water leakage from the fluid hose, water is retained in the second hole, and water is prevented from entering the connector in the first hole. In this way, the waterproof grommet sealability is improved, and the connector connection reliability and the waterproof seal reliability are improved. Also, for example, when the connector is eccentrically arranged on the flange part of the waterproof grommet, the flange part strongly adheres to the panel surface by the tensile force of the fluid hose on the side opposite to the eccentric direction of the connector. This improves the reliability of the connector connection by reliably preventing water from entering the connector from the outside.

According to the second aspect of the present invention, for example, when the connector is eccentrically arranged on the flange portion of the waterproof grommet, the flange portion is strongly adhered to the panel surface by the tensile force of the fluid hose on the side opposite to the eccentric direction of the connector. Therefore, the sealing performance of the waterproof grommet is improved, the entry of water from the outside to the connector is surely prevented, and the reliability of connector connection is improved.

According to the third aspect of the present invention, the fluid hose can be locked by a simple operation of being inserted through and pulled through the hole of the panel, thereby easily and reliably securing the collar portion of the elastic grommet to the panel surface. It can be closely attached, and the workability of attaching the waterproof grommet is improved.

According to the invention of claim 4, the workability of inserting the fluid hose into the hole of the panel is improved. Moreover, the tensile force of a fluid hose is received reliably and the tight seal property of the collar part of the waterproof grommet to a panel surface is improved reliably.

  1 to 2 show a first embodiment of a waterproof grommet mounting structure according to the present invention.

  This waterproof grommet 1 is made of a synthetic rubber and is elastically formed as in the prior art, and has an elliptical flange 3 that is integrated with an accordion-shaped flexible cylindrical portion 2, and the flange 3 has an oval substantially annular shape on the front surface. The seal portion 4 is preferably formed with a seal lip (not shown), and the connector 6 is disposed in one oval hole 29 in the longitudinal direction of the flange portion 3. A washer hose (fluid hose) 7 is disposed in the small circular hole 30.

  In the seal portion 4, a short-diameter side partition wall 8 that partitions the connector 6 and the washer hose 7 is integrally formed perpendicularly to the long-diameter side wall portion 4 a, and a long hole is formed through the partition wall 8. 29 and the small circular hole 30 are located, and the partition wall 8 preferably has a sealing lip (not shown) as described above. The shape of each seal lip is not limited to a crease shape, and may be a substantially semicircular cross section.

  As in the conventional case, the connector 6 has a flange portion 9 of a connector housing (substitute with reference numeral 6) fitted and fixed to a substantially oval circumferential groove 10 in the flange portion 3 of the waterproof grommet 1. Each terminal accommodating chamber 11 of the connector housing accommodates a female terminal (not shown) with an electric wire, and each electric wire passes through the flexible tube portion 2 and is led out from the other flange portion (not shown) to the vehicle body side. Has been. The waterproof grommet 1, the connector 6 and the washer hose 7 constitute a grommet assembly 12.

  The washer hose 7 continues from the back door side of the automobile to the vehicle body side through the inside of the waterproof grommet 1 together with a plurality of electric wires (wire harnesses). The washer hose 7 may be integrally formed with the waterproof grommet 1 or may be a separate body.

  When the washer hose 7 is integrated, the hose portion 7 is integrated with an elastic grommet body (substitute with reference numeral 1) to form the waterproof grommet 1, and the hose portion 7 is connected via a joint coupler (not shown). It is connected to the washer hose on the door side and the vehicle body side. In any case, the washer hose 7 and the connector 6 are partitioned by the partition wall 8.

  As shown in FIG. 2, a standby connector (mating connector) 14 and a washer hose 7 are arranged side by side on the panel 13 of the back door independently. That is, a first hole (opening) 15 for inserting a connector and a second hole 16 for inserting a washer hose are provided side by side on the panel 13, and a partition wall 17 is provided between both holes 15, 16. Is formed.

  The standby connector 14 is locked and fixed to the hole 15 of the panel 13 by locking means (not shown) such as a flexible locking arm as in the prior art. It is also possible to fix the standby connector 14 to the panel 13 with screws 19 or the like at the flange portion 19 of the connector housing (represented by reference numeral 14). The standby connector 14 has a male terminal tab-shaped or pin-shaped electrical contact portion 21 in the connector fitting chamber 20 of the connector housing, and the male terminal is connected to the electric wire in the door.

  At the same time when the grommet assembly 12 is mounted on the panel 13, both the connectors 6 and 14 are fitted and connected. For example, when the both connectors 6 and 14 are locked, the flange 3 of the waterproof grommet 1 is within the range of the hatched portion 22 in FIG. The connectors 6 and 14 and the washer hose 7 are sealed separately via the partition wall 17. As a result, even if water leaks from the washer hose 7, it is reliably prevented that water enters the connector side, and short-circuiting of terminals in the connector is reliably prevented.

  3 to 5 show a second embodiment of a waterproof grommet mounting structure according to the present invention. Components similar to those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  This waterproof grommet 1 'is formed by integrally forming a washer hose (fluid hose or hose part) 7' on an elastic grommet body (represented by reference numeral 1 '), and in the vicinity of the front side of the flange 3 of the grommet body. Further, a locking portion 23 for the panel 13, that is, a pair of front and rear projections 24, 26 projecting outwardly in a bowl shape, and a groove portion 25 between the projections are formed. The grommet body's collar 3 is strongly pressed against the panel surface 13a by using the tensile force when it is locked to the portion 16 '.

  When the washer hose 7 'is formed separately from the grommet main body, a part of the washer hose 7' is firmly fixed in the vicinity of the flange 3 of the grommet main body so that the tensile force shown in FIG. Ensure that the buttocks 3 are pressed (closely).

  The locking portion 23 of the washer hose 7 'is composed of a front small-diameter projection 24, a rear large-diameter projection 26, and a groove 25 between the two projections, and the small-diameter projection 24 is substantially tapered toward the front side. The diameter is reduced (inclined or curved) so that the washer hose 7 'can be smoothly engaged with the hole 16' of the panel 13 as shown in FIG. In the specification, “front” refers to the direction of the panel, and “rear” refers to the direction of the grommet body.

  Needless to say, the protrusions 24 and 26 of the locking portion 23 have a diameter larger than the outer diameter of the washer hose 7 ′, and a passage 27 for introducing the washer liquid is formed in the washer hose. The shape of the locking portion 23 of the washer hose 7 ′ is not limited to the above shape. For example, a plurality of protrusions are arranged on the circumference and the hole 16 ′ of the panel 13 is engaged between the front and rear protrusions. Is also possible.

  In FIG. 5, in order to apply a tensile force in the panel direction to the washer hose 7 ′, the groove portion 25 of the locking portion 23 is in a free state before the locking portion 23 is fitted into the hole 16 ′ of the panel 13. It is located closer to the grommet body than the panel 13, and the distance from the groove 25 to the front surface (seal portion 4) of the flange 3 must be set shorter than the distance from the panel 13 to the front surface 4 of the flange 3. is there. By engaging the groove 25 with the hole 16 'while pulling the washer hose 7' forward against its elasticity as shown in FIG. 4, a tensile force acts on the washer hose 7 'even after the engagement, The collar part 3 adheres to the panel surface 13a without a gap. The washer hose 7 'needs to be fixed to the grommet body integrally or separately.

  As in FIG. 2 of the above embodiment, a standby connector (mating connector) 14 is temporarily fixed to the panel 13 by a locking means such as a flexible locking arm 18 (FIG. 5) and a stop wall 28 integral with the connector housing. The washer hose 7 ′ is arranged along with the standby connector 14. The panel 13 is provided with a first hole 15 for inserting a connector and a second hole 16 'for inserting a washer hose in parallel with each other, and a partition wall 17 is formed between both the holes 15, 16'. Has been.

  Corresponding to this, as shown in FIG. 3, a connector 6 and a washer hose 7 ′ are arranged in parallel in the longitudinal direction of the oval flange 3 of the waterproof grommet 1 ′, and an oval for inserting the connector into the flange 3 is provided. Hole portion (opening) 29 and a small circular hole portion 30 for inserting the washer hose are provided, and a partition wall 8 is formed between the two hole portions 29 and 30.

  The connector 6 is fixed by fitting the flange portion 9 of the connector housing (substitute with reference numeral 6) into the circumferential groove 10 in the hole portion 29 of the flange portion 3. The washer hose 7 ′ protrudes integrally from the bottom surface of the hole 30 of the flange 3. A lead-out electric wire (wire harness) from the connector 6 is inserted together with the washer hose 7 ′ into the flexible cylindrical portion 2 following the flange portion 3.

  Similarly to the above-described embodiment, the connectors 6 and 14 and the washer hose 7 ′ are independently waterproof-sealed, so that in the event of a water leak from the washer hose 7 ′, Intrusion is reliably prevented.

  In the present embodiment, in addition to that, the flange 3 of the waterproof grommet 1 ′ can be strongly pressed against the panel surface 13a by the tensile force when the washer hose 7 ′ is locked to the panel 13, so that FIG. As described above, when the connector 14 is arranged eccentrically with respect to the flange 3 of the waterproof grommet 1 ′, the lifting of the flange 3 on the side opposite to the connector 14 is prevented, and the flange 3 extends over the entire circumference. It adheres securely to the panel 13 and exhibits a good waterproof seal.

  The improvement in the sealing performance with respect to the eccentric arrangement of the connector 14 is an effect exerted regardless of the waterproof grommet 1 and the partition walls 17 of the panel 13 as the configuration of the embodiment, and the embodiment of FIGS. In FIG. 2, the partition walls 8 and 17 are eliminated, and the flange 3 of the waterproof grommet 1 ′ is configured only by the oval annular seal portion 4, and the holes 15 and 16 of the panel 13 of FIG. It is also possible to make a large oval hole.

  In this case, the washer hose 7 'is not locked to the panel 13 but the groove 25 of the locking portion 23 is deeply engaged with a large oval hole (not shown) instead of the small circular hole 16'. It is made to lock by means of. In FIG. 5, the seal lip 5 is annularly provided on the entire circumference of the flange portion 3, and the intermediate partition wall 8 (FIG. 3) on the waterproof grommet side is drawn as an example.

  In each of the above embodiments, the example in which the flange 3 of the waterproof grommet 1 or 1 'is mounted on the panel 13 of the back door of the automobile has been described. However, the panel 13 is not limited to the back door, and for example, the front door It is also possible to apply a front end panel, a vehicle body panel, a panel in an engine room, and the like, and a liquid other than the washer liquid is introduced as a hose other than the washer hoses 7 and 7 '(in the second embodiment, a gas is used). Can also be introduced).

  In the second embodiment, the locking portion 23 of the washer hose 7 'is engaged with the circular hole 16' of the panel 13. For example, a separate clip or the like is used as the locking portion. It is also possible to fix the washer hose to the panel.

It is a perspective view which shows 1st embodiment of the attachment structure of the waterproof grommet which concerns on this invention. It is a perspective view which shows the state which similarly attaches a waterproof grommet to a panel. It is a perspective view which shows 2nd embodiment of the attachment structure of a waterproof grommet. It is sectional drawing which shows one locking means of the washer hose to a panel. It is sectional drawing which shows the state which similarly attached the waterproof grommet to the panel. It is sectional drawing which shows one form of the attachment structure of the conventional waterproof grommet. It is a perspective view which shows the other form of the conventional waterproof grommet. It is a perspective view which shows the other form of the attachment structure of the conventional waterproof grommet.

Explanation of symbols

1, 1 'waterproof grommet 3 collar 6 connector 7, 7' washer hose (fluid hose)
13 Panel 14 Standby connector (mating connector)
DESCRIPTION OF SYMBOLS 15 1st hole part 16, 16 '2nd hole part 17 Partition wall 23 Locking part 24 Small diameter protrusion 25 Groove part 26 Large diameter protrusion

Claims (4)

A connector and an elastic fluid hose are arranged on an elastic waterproof grommet, and a mating connector is arranged on the panel and the fluid hose is inserted, and both connectors are fitted to closely attach the flange portion of the waterproof grommet to the panel. In the waterproof grommet mounting structure
A first hole portion for inserting the mating connector into the panel, the second hole portion and the provided in parallel Rutotomoni for inserting the fluid hose, the partition wall is formed between the two holes, the fluid hose Provided with a locking portion for the second hole, the flange of the waterproof grommet is brought into close contact with the periphery of both holes including the partition wall, and the locking portion is locked to the second hole. A waterproof grommet mounting structure , wherein a tensile force acts on the fluid hose in a state of being pressed, and the flange portion is pressed against the panel by the tensile force . A connector and an elastic fluid hose are arranged on an elastic waterproof grommet, and a mating connector is arranged on the panel and the fluid hose is inserted, and both connectors are fitted to closely attach the flange portion of the waterproof grommet to the panel. In the waterproof grommet mounting structure
The fluid hose is provided with a locking portion for the panel, and a tensile force is applied to the fluid hose in a state where the locking portion is locked to the panel. Waterproof grommet mounting structure that is pressed against the panel. The waterproof grommet mounting structure according to claim 1 or 2 , wherein the locking portion includes a small-diameter projection and a groove for insertion into the hole of the panel and a large-diameter projection for stopping. . The waterproof grommet mounting structure according to any one of claims 1 to 3 , wherein the fluid hose is integrally formed with the waterproof grommet.

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