JP2017118742A - Grommet and wiring module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress reduction of cut-off performance due to a cut-off lip.SOLUTION: In a wiring module 1, a grommet 20 comprises: a peripheral wall part 60 that is formed in annular which can be distributed in a penetration hole; a flange part 70 that is provided to the peripheral side from one end so as to be projected; an inner member 50 that is provided from the peripheral wall part, and includes an engagement piece 62 capable of engaging to the peripheral part of the penetration hole in a panel; an annular sealing part 30 that is formed by an elastic material, and covers to the flange part so as to cover one principal surface of one end side of the peripheral wall part of both principal surfaces of the flange part, and surround the other principal surface; and a grommet main body 21 that is extended to an opposite side of the peripheral wall part from a peripheral edge part of an axial side of the annular sealing part in a state where the annular sealing part covers to the flange part, and includes a guide cylinder part 22 which can inserts a wiring part. In the flange part, a cylinder part side projection part projecting to the guide cylinder part side is provided. In a part to be covered to the flange part over exceeding the cylinder part side projection part from the guide cylinder part side of the annular sealing part, a cut-off lip 34 contactable to the panel is provided.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a grommet for protecting a wire harness inserted through a through hole of a panel.

  As such a grommet, Patent Document 1 discloses a grommet 200 including a grommet body 201 made of an elastic material and a cylindrical engagement portion (“inner member”) 401 made of a rigid material (FIG. 8). reference). A groove 601 is formed in the grommet main body 201, and a flange 701 of the engaging portion 401 is fitted therein, and the grommet main body 201 and the engaging portion 401 are coupled. The wire harness (“wiring part”) 18 passes through the bellows-like cylindrical part (wiring part guide cylinder part) 901 of the grommet body 201. A through hole 102 for attaching the grommet 200 is formed in the panel 101 of the vehicle body, and a burring portion is provided on the periphery of the through hole 102. The hole end abutting portion 151 of the grommet body 201 abuts on the tip of the burring portion, and the locking claw 301 includes the inner peripheral surface of the burring portion (that is, the inner peripheral surface of the through hole 102), the peripheral portion of the through hole 102, The grommet 200 is attached to the panel 101 by engaging with the panel 101. A seal lip 508 is provided on the outer peripheral edge portion of the hole end contact portion 151. The seal lip 508 is in contact with the panel 101 and suppresses transmission of rainwater, dust, noise, and the like through the through hole 102 from one space to the other space blocked by the vehicle body.

JP-A-9-63385

  However, in the grommet 200 of Patent Document 1, when the wire harness 18 is bent in the arrow Y3 direction and the bellows-shaped cylindrical portion 901 is bent in the same direction, the hole end contact portion 151 is detached from the flange portion 701 (arrow). The seal lip 508 is pulled in the direction (Y4 direction) and moves in the direction away from the panel 101 toward the bellows-shaped cylindrical portion 901 (arrow Y5 direction), resulting in a problem that the water stop performance is deteriorated.

  The present invention has been made to solve these problems, and provides a technique capable of suppressing a decrease in water stop performance due to a water stop lip even when a wire harness inserted through a guide tube portion of a grommet body is bent. The purpose is to do.

  In order to solve the above-described problem, the grommet according to the first aspect is a grommet that is attached to a through-hole of a panel in a state of being covered with a wiring portion including at least one electric wire, and the through-hole An annular peripheral wall portion that can be disposed inside, a flange portion that extends from one end of the peripheral wall portion to the outer peripheral side, and a peripheral edge of the through hole in the panel that is provided from the peripheral wall portion An inner member including a locking piece that can be locked to the portion, and an elastic material, so as to cover one main surface on one end side of the peripheral wall portion out of the two main surfaces of the flange portion and wrap around the other main surface An annular sealing portion covering the flange portion, and extending from the peripheral edge portion on the shaft side of the annular sealing portion to the opposite side of the peripheral wall portion with the annular sealing portion covering the flange portion, A grommet body including a guide tube portion through which the portion can be inserted. The flange portion is provided with a tube portion side protrusion portion protruding toward the guide tube portion side, and the flange portion extends from the guide tube portion side to the tube portion side protrusion portion of the annular sealing portion. A water-stopping lip that can contact the panel is provided in a portion that covers the panel.

  The grommet which concerns on a 2nd aspect is a grommet which concerns on a 1st aspect, Comprising: The said cylinder part side protrusion part is provided cyclically | annularly so that the said guide cylinder part may be surrounded along the circumferential direction.

  The grommet which concerns on a 3rd aspect is a grommet which concerns on the 1st or 2nd aspect, Comprising: The said cylinder part side protrusion part is provided in the front-end | tip part of the said collar part.

  The grommet which concerns on a 4th aspect is a grommet which concerns on any one 1st to 3rd aspect, Comprising: The panel side protrusion part which protrudes in the said panel side is further provided in the said collar part.

  A wiring module according to a fifth aspect includes the grommet according to any one of the first to fourth aspects, and the wiring portion that is inserted and held in the grommet.

  According to the first aspect of the present invention, the flange portion of the peripheral wall portion is provided with the cylindrical portion-side protruding portion that protrudes toward the guide cylindrical portion, and the cylindrical portion from the guide cylindrical portion side of the annular sealing portion. A water stop lip capable of coming into contact with the panel is provided at a portion covering the flange portion beyond the side protrusion. Therefore, even if the guide tube portion is bent by bending the wiring portion and the annular sealing portion is pulled toward the guide tube portion, the portion of the annular sealing portion where the water stop lip is provided is It is restrained from moving by being pulled to the part side. Thereby, the fall of the water stop performance resulting from the force which a water stop lip contact | abuts to a panel surface falls, or the water stop lip leaves | separates from a panel surface can be suppressed.

  According to the second aspect of the present invention, the cylindrical portion side projecting portion is provided in an annular shape so as to surround the guide cylindrical portion along the circumferential direction thereof, so that the guide cylindrical portion is bent in various directions. Even so, it is possible to prevent the portion of the annular sealing portion where the water stop lip is provided from being pulled and moved toward the guide tube portion.

  According to the third aspect of the invention, the cylindrical portion side protruding portion is provided at the distal end portion of the flange portion, so that the portion of the annular sealing portion where the water stop lip is provided is peeled off from the flange portion. As a result, the force required to pull the guide tube portion increases. Accordingly, it is possible to further suppress the portion of the annular sealing portion where the water stop lip is provided from being pulled and moved toward the guide tube portion.

  According to the fourth aspect of the invention, since the flange portion is further provided with the panel side protruding portion that protrudes to the panel side, the portion of the annular sealing portion where the water stop lip is provided is the flange portion. The force required for peeling from the guide tube and pulling it toward the guide tube portion increases. Accordingly, it is possible to further suppress the portion of the annular sealing portion where the water stop lip is provided from being pulled and moved toward the guide tube portion.

  According to the fifth aspect of the invention, the water stop lip provided in the annular sealing portion of the grommet body moves to the guide tube portion side even when the wiring portion inserted and held in the grommet is bent. Since this can be suppressed, it is possible to suppress a decrease in holding force of the grommet holding the panel. Thereby, the wiring module which can suppress the fall of the water stop performance by a water stop lip can be provided.

It is a perspective view which shows an example of the grommet which concerns on embodiment. It is a perspective view which shows the inner member of FIG. It is a perspective view which shows the grommet main body of FIG. It is sectional drawing in the A1-A1 cutting line of the grommet of FIG. FIG. 5 is an enlarged cross-sectional view of a portion B in the vicinity of the peripheral wall portion of FIG. 4. It is a partial expanded sectional view in the A2-A2 cutting line of the grommet of FIG. It is sectional drawing which shows the state which attached the wiring module provided with the grommet of FIG. 4 to the panel. It is sectional drawing which shows the grommet which concerns on a prior art.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, parts having the same configuration and function are denoted by the same reference numerals, and redundant description is omitted in the following description.

<About the embodiment>
Hereinafter, the grommet 20 and the wiring module 1 according to the embodiment will be described (see FIGS. 1 to 7). The wiring module 1 includes a grommet 20 and a wire harness 18 as a wiring portion (see FIG. 7).

  The grommet 20 is attached to the through-hole 12 of the panel 10 in a state of being covered with a wire harness 18 including at least one electric wire. The grommet 20 includes an inner member 50 and a grommet main body 21.

  The wire harness 18 is configured by bundling a plurality of electric wires (not shown). A connector (not shown) is connected to the end of each electric wire of the wire harness 18. In a state where the wiring module 1 including the wire harness 18 is incorporated in the vehicle, the connectors attached to the ends of the electric wires are connected to various electric components mounted on the vehicle. That is, the wiring module 1 is used as a component that connects various electrical components mounted on the vehicle.

  The wire harness 18 may include an optical fiber cord or the like. Moreover, the wiring part which becomes the accommodation object of the grommet 20 is not limited to one in which a plurality of electric wires are bundled as described above, and may be configured by only one electric wire.

  The inner member 50 is formed of, for example, resin or the like, and includes a peripheral wall portion 60 and a flange portion 70. The peripheral wall portion 60 forms an annular peripheral wall that can be disposed in the through hole 12. The collar portion 70 is provided so as to protrude from one end of the peripheral wall portion 60 to the outer peripheral side. The inner member 50 has rigidity with respect to the grommet main body 21 formed of an elastic material.

  The collar part 70 is an annular plate-like member, and a cylindrical part side projecting part 76 that projects toward the guide cylinder part 22 side is provided on one main surface 72 of the collar part 70. A panel-side protruding portion 78 that protrudes toward the panel 10 is further provided on the other main surface 74 of the flange portion 70. Even if the panel-side protruding portion 78 is not provided in the collar portion 70, the usefulness of the present invention is not impaired.

  The peripheral wall part 60 is provided with a locking piece 62 extending from the other end side of the peripheral wall part 60. More specifically, the locking piece 62 is provided so as to extend from the other end portion of the peripheral wall portion 60 toward one end side of the peripheral wall portion 60. A locking claw 64 projects from the outer surface side of the locking piece 62. The locking claw 64 is formed so as to be locked to the peripheral edge portion of the through hole 12 of the panel 10. Note that the collar portion 70 is not formed in a portion facing the locking piece 62 for the convenience of molding. The cylinder-side protruding part 76 and the panel-side protruding part 78 facing the locking piece 62 are supported by the cylinder-side protruding part 76 and the panel-side protruding part 78 that are adjacent to each other in the circumferential direction.

  The grommet main body 21 includes an annular sealing portion 30 and a guide tube portion 22. The annular sealing portion 30 is formed of an elastic material such as an elastomer, and covers the one main surface 72 on one end side of the peripheral wall portion 60 of both main surfaces of the flange portion 70 so as to go around the other main surface 74. It is the member which covers.

  The wire harness 18 is held by the grommet 20 by being wrapped with the adhesive tape T together with the guide tube portion 22 of the grommet body 21 while being inserted through the grommet 20.

  Of the annular sealing portion 30 of the grommet main body 21, the outer peripheral portion 36 and the contact base portion 38 are portions that cover the flange portion 70 from the guide tube portion 22 side beyond the tube portion side protruding portion 76.

  The annular sealing portion 30 is provided with a groove portion that can accommodate the flange portion 70, the cylindrical portion side protruding portion 76, and the panel side protruding portion 78 so as to surround the guide cylindrical portion 22. The contact base 38 is provided with a water stop lip (also referred to as a “seal lip” or “seal protrusion”) that can contact the panel 10.

  The contact base 38 is provided with a contact protrusion 32 on the center axis a1 side with respect to the water stop lip 34. The contact convex portion 32 contacts and supports the panel 10.

  The guide cylinder portion 22 extends from the peripheral edge portion on the axial side of the annular sealing portion 30 to the opposite side of the peripheral wall portion 60 in a state where the annular sealing portion 30 covers the flange portion 70. The guide tube portion 22 can be held through the wire harness 18.

  The cylindrical portion side protruding portion 76 is preferably provided in an annular shape so as to surround the guide cylindrical portion 22 along the circumferential direction thereof. In order to be said to be annular, it is not necessary to surround the guide tube portion 22 without a break, and it is sufficient if a virtual ring surrounding the guide tube portion 22 can be grasped along the tube portion side protruding portion 76. Further, the cylindrical portion side protruding portion 76 is preferably provided at the tip portion of the flange portion 70.

  According to the grommet according to the present embodiment configured as described above, the flange portion 70 of the peripheral wall portion 60 is provided with the cylindrical portion side protruding portion 76 that protrudes toward the guide cylindrical portion 22 side. A water stop lip 34 that can come into contact with the panel 10 is provided in a portion of the portion 30 that covers the flange portion 70 from the guide tube portion 22 side to the tube portion side protruding portion 76. Therefore, when the wire harness 18 is bent, the guide tube portion 22 is bent in the direction of the arrow Y1 in FIG. 7, for example, and the annular sealing portion 30 is pulled toward the guide tube portion 22 (in the direction of arrow Y2 in FIG. 7). Even so, the portion of the annular sealing portion 30 where the water stop lip 34 is provided is suppressed from being pulled and moved toward the guide tube portion 22 side. Thereby, the fall of the water stop performance resulting from the force which the water stop lip 34 contact | abuts on the panel 10 surface falls or the water stop lip 34 leaves | separates from the panel 10 surface can be suppressed.

  In addition, according to the grommet according to the present embodiment configured as described above, the cylindrical portion-side protruding portion 76 is provided in an annular shape so as to surround the guide cylindrical portion 22 along the circumferential direction thereof. Even if the cylindrical portion 22 is bent in various directions, it is possible to suppress the portion of the annular sealing portion 30 where the water stop lip 34 is provided from being pulled and moved toward the guide cylindrical portion 22.

  In addition, according to the grommet according to the present embodiment configured as described above, the cylindrical portion-side protruding portion 76 is provided at the distal end portion of the flange portion 70, so that the water stop lip of the annular sealing portion 30 is provided. The force required to peel the portion provided with 34 from the collar 70 and pull it toward the guide tube 22 increases. Therefore, it can further suppress that the part in which the water stop lip 34 is provided among the cyclic | annular sealing parts 30 is pulled to the guide cylinder part 22 side, and moves.

  In addition, according to the grommet according to the present embodiment configured as described above, the flange portion 70 is further provided with the panel-side protruding portion that protrudes toward the panel 10 side. The force required to peel the portion where the water lip 34 is provided from the collar portion 70 and pull it toward the guide tube portion 22 increases. Therefore, it can further suppress that the part in which the water stop lip 34 is provided among the cyclic | annular sealing parts 30 is pulled to the guide cylinder part 22 side, and moves.

  Further, according to the wiring module according to the present embodiment configured as described above, even when the wire harness 18 inserted and held in the grommet is bent, it is provided in the annular sealing portion 30 of the grommet body. Since it can suppress that the water stop lip 34 moves to the guide cylinder part 22 side, the grommet can suppress the fall of the retention strength which hold | maintains the panel 10. FIG. Thereby, the wiring module which can suppress the fall of the water stop performance by the water stop lip 34 can be provided.

  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 1 Wiring module 10 Panel 12 Through-hole 18 Wire harness (wiring part)
DESCRIPTION OF SYMBOLS 20 Grommet 21 Grommet main body 22 Guide cylinder part 25 Bellows cylinder part 30 Annular sealing part 32 Contact convex part 34 Water stop lip 36 Outer part 38 Contact base 50 Inner member 60 Peripheral wall part 62 Locking piece 64 Locking claw 70 Part 72 One main surface 74 The other main surface 76 Cylinder side protrusion 78 Panel side protrusion

Claims (5)

A grommet attached to a through-hole of a panel in a state where it is sheathed on a wiring portion including at least one electric wire,
An annular peripheral wall portion that can be disposed in the through hole, a flange portion that extends from one end of the peripheral wall portion to the outer peripheral side, and the through hole in the panel provided from the peripheral wall portion An inner member including a locking piece that can be locked to the peripheral edge of the hole;
An annular sealing portion that is formed of an elastic material and covers the one main surface on one end side of the peripheral wall portion of the two main surfaces of the flange portion and covers the other main surface; and the annular seal A grommet main body including a guide cylinder portion extending from the peripheral edge portion on the shaft side of the annular sealing portion to the opposite side of the peripheral wall portion in a state where the portion covers the flange portion, and capable of being inserted through the wiring portion;
With
The collar portion is provided with a cylindrical portion side protruding portion that protrudes toward the guide cylindrical portion side,
The grommet which is provided with the water stop lip which can contact | abut to the said panel in the part which has covered the said collar part over the said cylinder part side protrusion part from the said guide cylinder part side among the said annular sealing parts. The grommet according to claim 1,
The said cylinder part side protrusion part is a grommet provided cyclically | annularly so that the said guide cylinder part may be surrounded along the circumferential direction. The grommet according to claim 1 or 2, wherein
The said cylinder part side protrusion part is a grommet provided in the front-end | tip part of the said collar part. The grommet according to any one of claims 1 to 3, wherein
The grommet further provided with a panel-side protruding portion that protrudes toward the panel side. A grommet according to any one of claims 1 to 4,
The wiring part inserted and held in the grommet;
A wiring module comprising:

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