JP5765254B2 - Grommet - Google Patents

Description

  The present invention relates to a water stop technique in a through-hole portion formed in a vehicle body panel through which a wire harness is inserted and routed.

  A grommet may be attached to the through-hole part in order to stop water in the through-hole part formed in the vehicle body panel through which the wire harness is inserted and routed.

  Patent Document 1 discloses a grommet that can be divided in the circumferential direction. The grommet of Patent Document 1 is formed in a cylindrical shape by combining a divided body of a resin molded product (hereinafter referred to as a resin molded divided body) and a divided body formed of an elastic material (hereinafter referred to as an elastic divided body). A cylindrical body configured by combining resin-molded divided bodies has a small-diameter cylindrical portion and a diameter-expanding cylindrical portion that expands from one end thereof. Then, the resin molded divided body and the elastic divided body are assembled from both sides in the radial direction of the wire harness, and attached to the wire harness. Thereafter, the grommet is fixed to the wire harness by winding the tape over the wire harness from the small diameter tube portion.

JP 2000-50470 A

  However, according to the grommet of Patent Document 1, if the size of the wire harness is large with respect to the small diameter cylindrical portion, there is a problem that the wire harness cannot be disposed in the small diameter cylindrical portion. On the other hand, when a grommet having a large small-diameter cylindrical part is applied to a plurality of sizes of wire harnesses, there is a gap between the small-diameter cylindrical part and the wire harness when applied to a small size wire harness. There is a risk that the water stop performance will be reduced.

  Then, an object of this invention is to make it applicable to the wire harness of multiple sizes, maintaining water stop performance.

  A 1st aspect is a grommet which performs the water stop in the through-hole part formed in the vehicle body panel by which a wire harness is penetrated and wired, Comprising: The cylindrical main-body part which can penetrate the said wire harness, and the said main-body part A rigid inner member having a flange that projects from the outer peripheral side of the through-hole portion and can be opposed to the opening edge of the through-hole portion from one side of the vehicle body panel; and An annular water stop portion formed in an annular shape that can be in close contact with the opening edge of the through hole portion from one side of the vehicle body panel, and a harness insertion hole portion that allows the wire harness to be inserted therethrough are formed. And an elastic sealing member having a water blocking wall portion disposed inside and blocking the inner side of the main body portion in the penetrating direction, and the water blocking wall portion is elastic so that the diameter of the harness insertion hole portion can be increased. It is formed to be deformable.

  A 2nd aspect is a grommet concerning the 1st aspect, Comprising: The said water stop wall part is a pair of thin film part which pinched | interposed the vertex which faces an inner peripheral side in the cross sectional view orthogonal to the circumferential direction of the said main-body part. It is formed in the mountain shape which has.

The first aspect, before Symbol inner member has a plurality of divided molded bodies are formed side by side in the circumferential direction, the sealing member is separated at a portion in the circumferential direction of the annular water portion, the annular At least one intervening water-stopping portion including a pair of split intervening water-stopping portions extending from the butt end portion of the water-stopping portion to the inner peripheral side and continuing to the outer peripheral portion of the water-stopping wall portion in a part of the extending direction. The harness insertion hole is formed at a position eccentric to the butted end side of the pair of split interposed water stop portions.

A 3rd aspect is a grommet concerning the 1st or 2nd aspect, Comprising: The said harness insertion hole part is an inner periphery in the outer peripheral part of the said water stop wall part by the abutting surface side of a pair of said division | segmentation intervening water stop part. It is formed in the position to touch.

A 4th aspect is a grommet which concerns on any one 1st to 3rd aspect, Comprising: The said water stop wall part is provided with two or more in the penetration direction of the said main-body part.

  According to the grommet according to the first aspect, the sealing member is formed with a harness insertion hole portion through which the wire harness can be inserted, and is disposed inside the cylindrical main body portion through which the wire harness is inserted. Has a water blocking wall portion that partially blocks in the penetrating direction. Further, the water blocking wall portion is formed to be elastically deformable so that the diameter of the harness insertion hole portion can be increased. For this reason, even with respect to a wire harness having a size larger than the harness insertion hole portion, the water blocking wall portion is elastically deformed and the harness insertion hole portion is expanded in diameter, so that the water blocking wall portion is in close contact with the outer peripheral portion. Thereby, it is applicable to the wire harness of multiple sizes, maintaining water stop performance.

  According to the grommet which concerns on a 2nd aspect, in the cross sectional view orthogonal to the circumferential direction of a main-body part, the water stop wall part is formed in the mountain shape which has a pair of thin film part on both sides of the vertex which faces an inner peripheral side. Therefore, when a wire harness having a size larger than the harness insertion hole is inserted into the harness insertion hole, the wire harness is stably deformed in a form of being crushed to the outer peripheral side of the main body. Thereby, the contact | adherence state with respect to the wire harness of a water stop wall part can be stabilized more, and it contributes to the improvement of water stop performance.

Moreover, according to the grommet which concerns on a 1st aspect, since the inner member is formed in the circumferential direction of the some split molded body, the seal member is partially separated in the circumferential direction of the annular water stop part. The wire harness can be disposed on the inner side between the divided molded bodies of the inner member and between the separated portions of the seal member. In addition, the seal member includes at least one pair of divided intervening water stop portions that extend from the butt end portion of the annular water stop portion to the inner peripheral side and continue to the outer peripheral portion of the water stop wall portion in a part of the extending direction. There are two intervening waterstops. And the harness insertion hole part is formed in the position eccentric to the butt | matching edge part side of a pair of division | segmentation interposed water stop part. For this reason, the dimension of the butt end portion existing between the pair of split interposed water stop portions from the harness insertion hole portion of the water stop wall portion in the inner and outer directions of the main body portion can be further reduced, and the seal member can be surrounded. Even when it is formed in a shape separated in a part of the direction, it is possible to ensure water stopping performance.

According to the grommet according to the third aspect, the harness insertion hole is formed at a position inscribed in the outer peripheral portion of the water blocking wall portion on the abutting surface side of the pair of split interposed water blocking portions. In the direction, the dimension of the butt end existing between the pair of split interposed water stop portions from the harness insertion hole portion of the water stop wall portion can be minimized, and the water stop performance can be ensured more reliably. Can do.

According to the grommet which concerns on a 4th aspect, since the water stop wall part is provided with two or more in the penetration direction of the main-body part, water stop performance can be improved more.

It is a perspective view of a grommet. It is a perspective view of an inner member. It is a perspective view of a sealing member. It is a rear view of a grommet. It is the VV sectional view taken on the line of FIG. It is the VI-VI sectional view taken on the line of FIG. It is sectional drawing which shows the state by which the water stop wall part was expanded. It is sectional drawing which shows the state by which the water stop wall part was expanded. It is the IX-IX sectional view taken on the line of FIG. It is sectional drawing of the grommet which concerns on 2nd Embodiment. It is sectional drawing of the grommet which concerns on 2nd Embodiment.

<First Embodiment>
Hereinafter, the grommet 10 according to the first embodiment will be described (see FIG. 1). The grommet 10 is a member for stopping water in a through hole portion formed in a vehicle body panel through which the wire harness 1 is inserted and routed.

  The wire harness 1 is a linear member formed in a routing form by binding a plurality of electric wires, temporarily bundled electric wires, and the like. The wire harness 1 is a wire harness mounted on an automobile, and is inserted and distributed through a through-hole portion 92 formed in the vehicle body panel 90 (see FIGS. 5 and 6). Here, the through-hole part 92 shall be formed in substantially circular shape.

  The grommet 10 includes an inner member 20 and a seal member 50, and is configured by combining the inner member 20 and the seal member 50. Schematically, the grommet 10 is configured such that the inner member 20 is inserted and locked in the through hole portion 92 of the vehicle body panel 90, and the seal member 50 is in close contact with the opening edge portion of the through hole portion 92. Water stopping in the through direction of the through hole portion 92 is intended.

<Overall configuration of inner member>
The inner member 20 is a rigid member formed by injection molding or the like using a synthetic resin material (see FIG. 2). The inner member 20 is interposed between the opening edge and the wire harness 1 to protect the wire harness 1 and is locked to the opening edge of the through-hole portion 92 so that the seal member 50 is attached to the opening edge. This is the part to be pressed. The inner member 20 includes a main body portion 22, a locking portion 32, and a flange portion 42.

  The main body portion 22 is formed in a cylindrical shape (here, substantially cylindrical shape) that can be inserted into the through-hole portion 92 and can be inserted through the wire harness 1. The main body portion 22 has an insertion portion 24 and a small diameter portion 26 that are connected along the axial direction. And the main-body part 22 is inserted from the opening edge part of the through-hole part 92 by inserting the insertion part 24 in the through-hole part 92, and interposing between the opening edge part of the wire harness 1 and the through-hole part 92. The harness 1 is protected (see FIG. 5).

  The body portion 22 is inserted into the through-hole portion 92 from one side of the vehicle body panel 90 toward the other side. Here, in general, one side of the vehicle body panel 90 is the vehicle interior side, and the other side is the vehicle interior side. And the water stop in the through-hole part 92 is mainly aimed at the vehicle interior outer side. The main body portion 22 is inserted into the through-hole portion 92 with the insertion portion 24 facing forward in the direction of the central axis of the main body portion 22. Here, for the grommet 10, a direction in which the insertion portion 24 along the central axis direction of the main body portion 22 is forward is referred to as an insertion direction S. Further, in the following description, one side and the other side with respect to the vehicle body panel 90 may be described in place of the insertion direction S rear side and front side with respect to the vehicle body panel 90, respectively.

  The insertion portion 24 is set in a cylindrical shape having an outer diameter that is the same as or smaller than the through-hole portion 92 (slightly smaller here) in a cross-sectional view orthogonal to the insertion direction S. Here, the insertion portion 24 is formed in a substantially cylindrical shape, but may be formed in a cylindrical shape corresponding to the shape of the through-hole portion 92, and may be formed in an elliptical cylindrical shape, a rectangular cylindrical shape, or the like. It may be.

  The small diameter portion 26 is formed in a substantially cylindrical shape having an inner diameter smaller than that of the insertion portion 24. That is, the small diameter portion 26 is closer to the outer peripheral portion of the wire harness 1 inserted inward than the insertion portion 24 and extends along the outer peripheral portion of the wire harness 1. But the small diameter part 26 may be formed in the same diameter as the insertion part 24. FIG. The small diameter portion 26 is connected to the rear of the insertion portion 24 in the insertion direction S. Here, the small diameter portion 26 is connected to the insertion portion 24 via a hook-shaped connection wall portion that is substantially orthogonal to the insertion direction S.

  Further, the main body portion 22 preferably has a slip prevention portion 27 for preventing the seal member 50 from slipping with respect to the inner member 20. The slip prevention portion 27 is formed in a hook shape projecting from the outer peripheral portion of the small diameter portion 26 to the outer peripheral side. Here, the slip prevention portion 27 is provided at the rear end portion in the insertion direction S of the small diameter portion 26. However, the slip prevention part 27 may be formed in a shape that partially protrudes to the outer peripheral side in the circumferential direction of the small diameter part 26. Further, the displacement preventing portion 27 may be omitted if the displacement of the seal member 50 does not become a problem.

  The locking portion 32 is a portion formed so as to be locked from the front in the insertion direction S with respect to the opening edge portion of the through-hole portion 92 (see FIG. 5). More specifically, the locking portion 32 is formed in a shape protruding from the outer peripheral portion of the insertion portion 24 of the main body portion 22 to the outer peripheral side. A plurality (three in this case) of the locking portions 32 are provided at intervals in the circumferential direction of the insertion portion 24.

  The locking portion 32 has a locking surface facing rearward substantially perpendicular to the insertion direction S. Moreover, the latching | locking part 32 has the inclined surface which goes to an outer peripheral side gradually toward back in the insertion direction S front side. Moreover, the latching | locking part 32 is comprised so that elastic deformation can be carried out from the form protruded from the outer peripheral part of the insertion part 24 to the outer peripheral side to the form retracted to the inner peripheral side. Here, the engaging portion 32 has an end on the rear side in the insertion direction S as a free end, and a free end is formed on the inner peripheral side of the insertion portion 24 so as to be elastically deformable with a base end on the front side as a base point. Yes.

  When the insertion portion 24 is inserted into the through-hole portion 92, the locking portion 32 has an inclined surface that faces the front abuts against the opening edge portion of the through-hole portion 92. It is pushed into and elastically deforms. When the insertion portion 24 is inserted until the locking surface exceeds the through-hole portion 92, the locking portion 32 returns to the original shape that protrudes to the outer peripheral side of the insertion portion 24 by its own elasticity. Accordingly, the locking portion 32 is disposed at a position facing the opening edge portion of the through-hole portion 92 from the front in the insertion direction S.

  The collar portion 42 is a portion that presses an annular water stop portion 52 of the seal member 50 described later against the opening edge portion of the through-hole portion 92 (see FIG. 5). The flange portion 42 is formed in a flange shape that protrudes from the outer peripheral portion of the main body portion 22 (here, the insertion portion 24) to the outer peripheral side, and can be opposed to the opening edge portion of the through-hole portion 92 from the rear in the insertion direction S. is there. That is, the collar portion 42 is set to have a size that overlaps in the insertion direction S in the state where the insertion portion 24 is inserted into the through-hole portion 92 (an outer shape larger than the through-hole portion 92).

  More specifically, the collar part 42 is formed in a flat shape along a direction orthogonal to the insertion direction S. In addition, the flange portion 42 is provided at a position on the rear side in the insertion direction S with a gap larger than the thickness dimension of the opening edge portion of the through hole portion 92 with respect to the locking surface of the locking portion 32. Moreover, the position of the collar part 42 is a position where the space | interval smaller than the dimension which added the thickness dimension of the opening edge part and the thickness dimension of the annular water stop part 52 with respect to the locking surface was opened. That is, the above position is the annular water stop of the sealing member 50 which is an elastic body in a state where the opening edge portion of the through hole 92 and the annular water stop portion 52 are sandwiched between the engaging portion 32 and the flange portion 42. The part 52 is set so as to be elastically deformed and closely contact the opening edge. Here, the collar portion 42 is provided at the rear end portion in the insertion direction S of the insertion portion 24.

  The inner member 20 has a cylindrical shape in which a plurality of rigid divided molded bodies 201 molded from a synthetic resin material are arranged in the circumferential direction. Here, the inner member 20 has three divided molded bodies 201. The three divided molded bodies 201 are connected by hinge portions 202 at two locations in the circumferential direction and separated so as to be opened and closed at one location. This separated part is referred to as an opening 204. Further, the circumferential end of each divided molded body 201 is referred to as a butt end. The inner member 20 is configured to be openable and closable by the opening portion 204 by changing the posture of the divided molded bodies 201 inward and outward with the hinge portion 202 as a base point. That is, the wire harness 1 can be disposed inside the inner member 20 through the opening portion 204 with the inner member 20 opened.

<Partition molding>
The divided molded body 201 includes a divided main body portion 221, a locking portion 32, a divided flange portion 421, and a butting rib 461 (see FIG. 2). Hereinafter, the circumferential direction used for the divided molded body 201 will be described as the circumferential direction in the form configured as the inner member 20.

  The divided main body part 221 is a part constituting a part of the main body part 22 in the circumferential direction. Here, the divided main body 221 is formed in a shape obtained by dividing the main body 22 into three equal parts in the circumferential direction. The divided main body portion 221 includes a divided insertion portion 241 and a divided small diameter portion 261. That is, the divided insertion portion 241 is a portion constituting a part in the circumferential direction of the insertion portion 24, and the divided small diameter portion 261 is a portion constituting a circumferential portion of the small diameter portion 26. Moreover, the division | segmentation shift | offset | difference prevention part 271 which protrudes in the outer peripheral part from the insertion direction S rear-end part among the outer peripheral parts of the division | segmentation small diameter part 261 is provided. The division stopper part 271 is a part constituting a part of the stopper part 27 in the circumferential direction.

  The locking part 32 is formed in a shape protruding from the divided main body part 221 to the outer peripheral side. Here, one locking portion 32 is provided at the intermediate portion in the circumferential direction of the divided main body portion 221.

  The divided collar part 421 is a part constituting a part in the circumferential direction of the collar part 42. Here, the split collar part 421 is formed in a shape obtained by dividing the collar part 42 into three equal parts in the circumferential direction. More specifically, the split collar part 421 is formed in a shape protruding from the split main body part 221 to the outer peripheral side.

  The butting ribs 461 protrude outward from both circumferential edges of the portion of the divided molded body 201 disposed on one side (the rear side in the insertion direction S) of the vehicle body panel 90, and extend in a direction perpendicular to the circumferential direction. And formed into a flat rib shape (see FIG. 2). The butting ribs 461 extend from the outer peripheral portion of the divided flange portion 421 to the rear end portion of the divided small-diameter portion 261 at both circumferential edges of the divided molded body 201. More specifically, the butt rib 461 protrudes from the wall portion connecting the split collar portion 421 and the split insertion portion 241 and the split small diameter portion 261 toward the rear in the insertion direction S, and from the split small diameter portion 261 to the outer peripheral side. Overhangs towards. That is, the outside of the divided molded body 201 is the rear side in the insertion direction S in the connecting wall portion that connects the divided flange portion 421 and the divided insertion portion 241 and the divided small diameter portion 261, and the outer peripheral side in the divided small diameter portion 261. It is. The butting rib 461 is a portion that sandwiches a midway intervening water stop 62 or a pair of split intermediary water stop 64 described later (see FIG. 9). That is, by providing the butt ribs 461, it is possible to secure a larger contact surface between the intermediate interposed water stop 62 and the divided intermediate water stop 64 sandwiched between the butt ends of the divided molded bodies 201.

  Moreover, the front end surface of the butting rib 461 is formed in a shape along the circumferential direction. The front end surface of the butting rib 461 is a portion that comes into contact with a water stop overhanging portion 66 of a seal member 50 described later.

  In addition, a protruding portion 471 formed in a shape protruding in the direction opposite to the circumferential end portion of the divided molded body 201 is provided at the distal end portion of the butting rib 461. It should be noted that the projecting portion 471 may be formed in a shape projecting sideways along the tip surface of the butting rib 461. Here, the overhanging portion 471 overhangs in the circumferential direction. In FIG. 1, a protruding portion 471 partially provided in the extending direction of the butting rib 461 is shown. The overhang portion 471 is a portion for securing a contact surface with a water stop overhang portion 66 of the seal member 50 described later.

  A plurality (three in this case) of the divided molded bodies 201 are connected by hinge portions 202 at the outer peripheral side end portions. More specifically, the hinge part 202 is at least a part of the outer peripheral side end part of the split collar part 421 and the outer peripheral side end part of the butting rib 461 (here, inserted) at the abutting end part of the adjacent divided molded body 201. Connect the whole direction S).

  In the circumferential direction, the inner member 20 is connected by a hinge portion 202 in a form in which three divided molded bodies 201 are spaced. Moreover, the inner member 20 is formed in the form which opened the clearance gap in the circumferential direction in the opening part 204. FIG. That is, the inner member 20 is formed in a shape capable of sandwiching a middle interposed water stop 62 and a pair of divided interposed water stop 64, which will be described later, in a gap between the divided molded bodies 201.

<Seal member>
The seal member 50 is a portion that is formed of an elastic material and is intended to stop water in the penetration direction of the through-hole portion 92 by being in close contact with the opening edge portion of the through-hole portion 92 (see FIG. 3). The seal member 50 includes an annular water stop portion 52, an intervening water stop portion, a water stop overhang portion 66, and an inner water stop portion 72.

  Further, the seal member 50 has a cylindrical portion, and is formed in a shape in which the cylindrical portion is separated at least partially (here, partially) in the circumferential direction. That is, the seal member 50 can be opened and closed from the separated part. Here, the whole separated portion of the seal member 50 is referred to as an open portion 51, and both end portions thereof are referred to as butt end portions.

  The annular water stop 52 is disposed on one surface side (front of the insertion direction S) with respect to the flange 42, and is pressed against the opening edge of the through hole 92 from the rear of the insertion direction S by the flange 42. This is the part that is in close contact (see FIG. 5). The annular water stop portion 52 is formed in an annular shape larger than the through hole portion 92 so as to be able to be in close contact with the opening edge portion of the through hole portion 92 from the rear in the insertion direction S. Here, the annular water stop portion 52 is formed in an annular shape corresponding to the shape of the through-hole portion 92. Further, the annular water stop 52 is separated by the opening 51 and has a butt end that constitutes a part of the butt end of the seal member 50.

  The annular water stop 52 includes an annular base 53, an inner annular protrusion 54, and an outer annular protrusion 56. Schematically, the annular water stop 52 is formed in a shape in which the inner annular protrusion 54 and the outer annular protrusion 56 protrude from the front side in the insertion direction S of the annular base 53. The annular water stop 52 is designed to stop water when the inner annular protrusion 54 and the outer annular protrusion 56 are in close contact with the opening edge of the through hole 92.

  The annular base portion 53 is a portion disposed in contact with the front end surface in the insertion direction S of the flange portion 42. That is, the annular base 53 is disposed in front of the flange portion 42 in the insertion direction S and surrounds the insertion portion 24 and includes at least a part in the inner and outer directions including the outer peripheral side portion and the flange portion 42 over the circumferential direction. It is formed in a shape overlapping with the insertion direction S. The annular base 53 has a flat shape in a direction orthogonal to the insertion direction S.

  The inner annular protrusion 54 is a portion that is in close contact with the opening edge of the through-hole portion 92 from the rear side in the insertion direction S and stops water in the inner and outer directions. More specifically, the inner annular protrusion 54 is formed in a shape protruding from the annular base 53 toward the front in the insertion direction S. The inner annular protrusion 54 is provided along the annular base 53 at a position overlapping with the flange 42 in the insertion direction S. Further, the inner annular protrusion 54 is formed in a shape that becomes thinner toward the tip. That is, when the inner annular protrusion 54 is pressed against the opening edge portion of the through-hole portion 92, the distal end side portion is mainly elastically deformed and compressed, so that the inner annular protrusion portion 54 is stronger than the opening edge portion. In close contact.

  The outer annular protrusion 56 is a part that is in close contact with the opening edge of the through-hole portion 92 from the rear side in the insertion direction S and stops water in the inner and outer directions, like the inner annular protrusion 54. The outer annular protrusion 56 is provided on the outer peripheral side of the inner annular protrusion 54 along the annular base 53 at a position where at least the base end overlaps with the flange 42 in the insertion direction S. More specifically, the outer annular protrusion 56 is formed in a shape protruding from the annular base 53 so as to incline toward the outer peripheral side toward the front side in the insertion direction S. Further, the outer annular protrusion 56 is formed in a shape that becomes thinner toward the tip. That is, when the outer annular protrusion 56 is pressed against the opening edge portion of the through-hole portion 92, the portion on the distal end side (outer peripheral side) mainly elastically moves toward the side where the inclination angle becomes larger with respect to the insertion direction S. Deforms and adheres closely to the opening edge.

  The inner annular protrusion 54 is a part that is more closely attached to the opening edge of the through hole 92, and the outer annular protrusion 56 is a part that is closely attached to the opening edge in a larger area.

  Here, a rear annular portion 58 is provided behind the annular base 53 in the insertion direction S with a gap. More specifically, the rear annular portion 58 is connected to the annular base portion 53 at the outer peripheral end portion. An annular groove 59 is provided between the annular base 53 and the rear annular portion 58 so as to open to the inner peripheral side and dispose the outer peripheral portion of the flange portion 42. The width dimension of the groove 59 is preferably set to be substantially the same as the thickness dimension of the flange 42.

  The intervening water stop has a midway intervening water stop 62 and a pair of split intervening water stops 64. The intermediate interposed water stopping portion 62 and the pair of divided interposed water stopping portions 64 are divided into a plurality of divisions at a portion disposed on one side (the rear side in the insertion direction S) of the vehicle body panel 90 of the plurality of divided molded bodies 201. It is a part for interposing between the butted ends of the molded body 201 and for stopping water between the divided molded bodies 201 (see FIG. 9). More specifically, the intermediate interposed water stop 62 and the divided interposed water stop 64 are sandwiched between the butting ribs 461 facing each other in the circumferential direction of the adjacent divided molded body 201. The intermediate interposed water stop 62 and the divided interposed water stop 64 are provided at equal intervals in the circumferential direction corresponding to the butted portions of the divided molded body 201.

  The intermediate intervening water stop 62 is a portion that is sandwiched between the butted ends (butting ribs 461) of the divided molded body 201 connected by the hinge 202. Here, the intermediate intervening water stop portions 62 are provided at two locations in the circumferential direction.

  More specifically, the intermediate intervening water stop 62 extends from a part in the circumferential direction of the annular water stop 52 (annular base 53) to the butt rib 461 of the split molded body 201 on the inner peripheral side and the insertion direction S rear side. It is formed to extend in a corresponding form. In other words, the intermediate intervening water stop 62 is formed in a shape that overlaps the extending direction with respect to the butt rib 461 in the circumferential direction. Here, the intermediate interposed water stop portion 62 overlaps the entire butt rib 461 in the circumferential direction, and has a substantially L shape in the circumferential direction. Moreover, the midway intermediate water stop part 62 is formed in the flat shape along the direction orthogonal to the circumferential direction. In addition, the intermediate intervening water stop 62 extends across the groove 59 and is continuous with an inner cylindrical portion 74 of an inner water stop 72 described later at an inner peripheral side end.

  A pair of divided intervening water stop portions 64 are provided so as to extend from each butt end portion of the annular water stop portion 52 in a form corresponding to the butt rib 461 of the divided molded body 201. The pair of split interposed water stop portions 64 are portions that are sandwiched between the butted ends (butting ribs 461) of the adjacent divided molded bodies 201 in the opening portion 204. And a pair of division | segmentation intervening water stop part 64 is abutted and contacted together in the state which the butted end part of the annular water stop part 52 faced and contacted. Note that the butt end portions of the pair of split interposed water stop portions 64 constitute a part of the butt end portion of the opening 51.

  More specifically, the split interposed water stop 64 is formed so as to extend from the butt end of the annular water stop 52 in a form corresponding to the butt rib 461 on the inner peripheral side and the rear side in the insertion direction S. ing. That is, the divided intervening water stop portion 64 is formed in a shape that overlaps with the butting rib 461 in the extending direction in the circumferential direction. Here, the divided intervening water stop portion 64 overlaps the entire butt rib 461 in the circumferential direction, and has a substantially L shape when viewed in the circumferential direction. Further, the pair of split interposed water stop portions 64 are each formed in a flat shape along a direction orthogonal to the circumferential direction. Further, the divided intervening water stop 64 extends across the groove 59 and is continuous with an inner cylindrical portion 74 of the inner water stop 72 described later at the inner peripheral end.

  In addition, the mating surfaces of the intermediate interposed water stop 62 and the divided water stop 64 and the butt end of the divided molded body 201 are set in a shape along a direction orthogonal to the circumferential direction.

  The water stop overhanging portion 66 is a portion formed in a shape protruding in the circumferential direction from the front ends of the intermediate intervening water stopping portion 62 and the pair of split intervening water stopping portions 64 (see FIG. 9). The water stop overhanging portion 66 is a portion that comes into contact with the circumferential end of the divided molded body 201 (here, the tip of the butting rib 461). Further, the water stop overhanging portion 66 may be in contact with the outer surface of the overhanging portion 471.

  More specifically, a pair of water stop overhang portions 66 are provided in the midway intervening water stop portion 62 so as to protrude from the tip portion to both sides in the circumferential direction. Moreover, the water stop overhang | projection part 66 is provided in the division | segmentation intervening water stop part 64 so that it may protrude toward the opposite side to a butt | matching edge part in the circumferential direction from the front-end | tip part.

  Here, the water stop overhang | projection part 66 has the surface along the circumferential direction, and contacts the front-end | tip part of the butt | matching rib 461 similarly along the circumferential direction. That is, the contact surface between the water stop overhanging portion 66 and the tip of the butting rib 461 is set along the circumferential direction. In other words, the contact surface between the water stop overhanging portion 66 and the tip end portion of the butt rib 461 is the mating surface between the butt end portion of the divided molded body 201 and the intermediate interposed water stop portion 62 and the divided intervening water stop portion 64. Is set to a shape orthogonal to In particular, in a portion where the butt rib 461 protrudes rearward in the insertion direction S, the contact surface between the tip end portion of the butt rib 461 and the water stop overhanging portion 66 is set to be orthogonal to the insertion direction S. .

  The inner water stop portion 72 is a portion having an internal cylindrical portion 74 that contacts the outer peripheral portion of the wire harness 1 and is disposed on the inner peripheral side of the small diameter portion 26 (see FIGS. 5 and 6). The inner water stop portion 72 is separated at a part in the circumferential direction, and both end portions thereof are referred to as butt end portions. The butt end portion of the inner water stop portion 72 constitutes a part of the butt end portion of the open portion 51 of the seal member 50. The inner water stop 72 includes the inner cylindrical portion 74 and a rear end annular portion 78.

  The rear end annular portion 78 is a portion that surrounds the outer peripheral portion of the rear end portion in the insertion direction S of the small diameter portion 26. The intermediate interposed water stop 62 and the split interposed water stop 64 are provided continuously at the rear end in the insertion direction S. The rear end annular portion 78 is formed in a shape that extends from the portion covering the outer peripheral portion of the small diameter portion 26 to the rear in the insertion direction S so as to cover the rear end portion in the insertion direction S of the small diameter portion 26.

  In addition, the rear end annular portion 78 is formed in a shape in which the displacement preventing portion 27 can be disposed inside. More specifically, the rear end annular portion 78 has an inner wall portion that comes into contact with the slip preventing portion 27 from both sides in the insertion direction S. Thereby, the inner water stop 72 is positioned in the insertion direction S with respect to the inner member 20. Since the annular water stop 52 is positioned in the insertion direction S at the flange 42, the seal member 50 is positioned in the insertion direction S with respect to the inner member 20 as a whole.

  The internal cylindrical portion 74 is a cylindrical portion that is disposed inside the main body portion 22 (small diameter portion 26) and extends forward from the inner peripheral side end portion of the rear end annular portion 78 in the insertion direction S. The inner cylindrical portion 74 has at least one (here, one) water blocking wall portion 76 in the insertion direction S.

  The water blocking wall portion 76 is a portion that is in close contact with the outer peripheral portion of the wire harness 1 that is inserted through the grommet 10 so as to stop water between the grommet 10 and the wire harness 1. The water blocking wall portion 76 has a harness insertion hole 77 that can penetrate the wire harness 1 through the insertion direction S, and is formed in a shape that blocks the inside of the small diameter portion 26 in the penetration direction (insertion direction S). ing.

  More specifically, the harness insertion hole 77 is formed in a substantially circular shape. But the harness penetration hole 77 should just be formed in the shape corresponding to the outer shape of the wire harness 1, for example, may be elliptical.

  Further, the water blocking wall portion 76 is constituted by a thin film portion, so that the harness insertion hole portion 77 can be elastically deformed so that the diameter thereof can be increased. More specifically, the harness insertion hole 77 is the same as or slightly smaller than the diameter of the smallest wire harness 1 to be inserted and routed through the through hole 92 of the vehicle body panel 90. It is set to a small diameter. In addition, the water blocking wall portion 76 is such that the largest diameter wire harness 1 to be inserted and routed through the through-hole portion 92 can be inserted by expanding the harness insertion hole portion 77. The film thickness, shape, and the like may be set so that elastic deformation is easy.

  Here, the water blocking wall portion 76 is formed in a mountain shape having a pair of thin film portions sandwiching the apex facing the inner peripheral side in a cross-sectional view orthogonal to the circumferential direction of the main body portion 22. That is, an annular space is formed between the water blocking wall portion 76 and the small diameter portion 26. When the water blocking wall portion 76 is pressed from the inner peripheral side toward the outer peripheral side due to the above shape, the apex facing the inner peripheral side moves to the outer peripheral side, and the pair of thin film portions are inserted in both sides of the insertion direction S. It is elastically deformed so as to swell (see FIGS. 7 and 8). More specifically, the small-diameter portion 26 is present on the outer peripheral side of the water blocking wall portion 76 so as to be in contact with the outer peripheral portion of the water blocking wall portion 76. For this reason, when the water blocking wall portion 76 is pressed to the outer peripheral side, the water blocking wall portion 76 is restricted from moving toward the outer peripheral side by the small diameter portion 26 and elastically deforms.

  Furthermore, the harness insertion hole 77 is formed at a position eccentric to the butted end side of the pair of split interposed water blocking portions 64 in the water blocking wall portion 76 (see FIG. 9). Here, the harness insertion hole 77 is formed at a position inscribed in the outer peripheral portion of the water blocking wall 76 on the butt end portion side of the pair of split interposed water blocking portions 64. That is, the water blocking wall portion 76 constituted by the thin film portion has a small abutting area at the abutting end portion, and is preferably abutted at a position where a force in a direction in which the abutting end portion is abutted is more exerted. Here, since the pair of split interposed water stop portions 64 are sandwiched and adhered between the adjacent split molded bodies 201 at the opening portion 204, a pair of split interposed stop portions among the butt end portions at the open portion 51 of the seal member 50 are used. It is butt | matched more strongly in the position near the water part 64. FIG. Therefore, the position of the harness insertion hole 77 is set as described above, and the butted end portion of the water blocking wall 76 is limited to the minimum size at a position closer to the pair of split interposed water blocking portions 64.

  The grommet 10 is attached to the wire harness 1 through the openings 204 and 51 by opening the opening 204 of the inner member 20 and 51 of the seal member 50. The mounting of the grommet 10 may be performed at a stage before the wire harness 1 is inserted and routed through the through-hole portion 92, or may be performed at a subsequent stage.

  More specifically, in the grommet 10, when the opening portions 204 and 51 are opened, the divided molded body 201 changes its posture with the hinge portion 202 of the inner member 20 as a base point, and the seal member 50 is elastically deformed. And in the state which the opening parts 204 and 51 of the grommet 10 opened, it arrange | positions in the main-body part 22 in the aspect which arrange | positions the wire harness 1 in the harness insertion hole part 77. FIG. When the diameter of the wire harness 1 is larger than the harness insertion hole 77, the harness insertion hole 77 may be expanded to dispose the wire harness 1. And the grommet 10 can be attached to the wire harness 1 by closing the opening parts 204 and 51 (returned by the elasticity of the sealing member 50 itself). In this state, the opening edge of the harness insertion hole 77 is in contact with the outer periphery of the wire harness 1. Further, the butt end portion of the seal member 50 is opposed to the circumferential direction, preferably in contact.

  In the state where the grommet 10 is attached to the wire harness 1, the tape may be wound around the outer periphery of the wire harness 1 extending from the outer periphery of the rear end annular portion 78 to the rear in the insertion direction S. Thereby, while being able to improve the water stop between the grommet 10 and the wire harness 1, the positioning of the grommet 10 with respect to the wire harness 1 can be performed.

  The grommet 10 is attached to the vehicle body panel 90 by being inserted into the through-hole portion 92. More specifically, the insertion portion 24 is inserted into the through-hole portion 92 toward the front in the insertion direction S. Accordingly, the locking portion 32 is locked from the front in the insertion direction S with respect to the opening edge portion of the through-hole portion 92. Further, the annular base 53 of the annular water stop 52 is pressed toward the front in the insertion direction S by the flange 42, so that the inner annular protrusion 54 and the outer annular protrusion 56 are formed at the opening edge of the through hole 92. In close contact with the insertion direction S from the rear side.

  Further, when the insertion portion 24 is inserted into the through-hole portion 92, each divided molded body 201 tends to move in a direction in which the inner member 20 is reduced in diameter by being tightened. Thereby, the butting rib 461 in the adjacent divided molded body 201 sandwiches the intermediate interposed water stop 62 or the pair of divided interposed water stop 64 more strongly in the circumferential direction. That is, the insertion part 24 in the grommet 10 is inserted into the through-hole part 92 so that the divided molded bodies 201 sandwich the intermediate interposed water stop part 62 and the pair of divided intermediate water stop parts 64 in a compressed manner. It may be set slightly larger than the through-hole portion 92. Accordingly, the degree of adhesion between the butt rib 461 and the intermediate interposed water stop 62 or the pair of split interposed water stop 64 (the inner member 20 and the seal member 50), and the pair of divided intermediate water stops 64 (seal The water stop performance is improved by increasing the degree of adhesion between the members 50). In addition, a water stop overhanging portion 66 exists on the rear side or the outer peripheral side in the insertion direction S of the mating surface of the butt rib 461 and the intermediate interposed water stop portion 62 or the pair of split interposed water stop portions 64. For this reason, water or the like is prevented from being directly applied to the mating surface from the rear side or the outer peripheral side in the insertion direction S.

  According to the grommet 10 according to the configuration of the above embodiment, the seal member 50 is formed inside the cylindrical main body portion 22 in which the harness insertion hole 77 through which the wire harness 1 can be inserted is formed and the wire harness 1 is inserted. It has a water blocking wall 76 that is provided and partially blocks the inside of the main body 22 in the penetrating direction. Further, the water blocking wall portion 76 is formed so as to be elastically deformable so that the diameter of the harness insertion hole portion 77 can be increased. For this reason, even with respect to the wire harness 1 having a size larger than the harness insertion hole 77, the water blocking wall 76 is elastically deformed and the harness insertion hole 77 is expanded in diameter, so that the water blocking wall 76 has an outer periphery. Close contact with the part. Thereby, it is applicable to the wire harness 1 of multiple sizes, maintaining water stop performance.

  Further, since the water blocking wall portion 76 is formed in a mountain shape having a pair of thin film portions sandwiching the apex facing the inner peripheral side in a cross-sectional view orthogonal to the circumferential direction of the main body portion 22, the harness insertion hole portion When the wire harness 1 having a size larger than 77 is inserted into the harness insertion hole 77, the wire harness 1 is stably deformed in a form of being crushed to the outer peripheral side of the main body 22. Thereby, the adhesion state with respect to the wire harness 1 of the water stop wall part 76 can be stabilized more, and it contributes to the improvement of water stop performance.

  In addition, since the inner member 20 is formed by arranging a plurality of divided molded bodies 201 side by side in the circumferential direction and the seal member 50 is partially separated in the circumferential direction of the annular water stop 52, the inner member 20 is divided. The wire harness 1 can be disposed on the inner side between the molded bodies 201 and between the separated portions of the seal member 50. In addition, a pair of divided intervening water stop portions, in which the seal member 50 extends from the butt end portion of the annular water stop portion 52 to the inner peripheral side and continues to the outer peripheral portion of the water stop wall portion 76 in a part of the extending direction. 64. At least one intervening water stop portion including 64 is provided. And the harness penetration hole 77 is formed in the position eccentric to the butt | matching edge part side of a pair of division | segmentation intervening water stop part 64. As shown in FIG. For this reason, the dimension of the butt end part existing between the pair of split interposed water blocking parts 64 from the harness insertion hole 77 in the water blocking wall part 76 in the inner and outer directions of the main body part 22 can be further reduced. Even when the sealing member 50 is formed in a shape separated in a part in the circumferential direction, water stopping performance can be ensured.

  Moreover, since the harness insertion hole 77 is formed at a position inscribed in the outer peripheral portion of the water blocking wall 76 on the abutting surface side of the pair of split interposed water blocking portions 64, It is possible to minimize the size of the butt end portion between the harness insertion hole 77 in the wall portion 76 and the pair of split interposed water stop portions 64, and to ensure water stop performance more reliably. it can.

  So far, the configuration in which the inner member 20 has the locking portion 32 that locks from the front side in the insertion direction S with respect to the opening edge portion of the through-hole portion 92 has been described. 92 may be positioned. For example, a positioning member that is a separate member that can be fitted to the distal end portion of the insertion portion of the inner member can be employed. And the insertion part of an inner member is inserted from the vehicle interior side of the vehicle body panel 90, and the positioning member is fitted to the insertion part from the vehicle interior side, so that the positioning member is against the opening edge of the through hole 92. The inner member may be positioned by locking from the front side in the insertion direction S.

  Further, although the example in which the seal member 50 has a shape separated at a part in the circumferential direction has been described, the seal member 50 may be configured by a plurality of members separated at a plurality of locations in the circumferential direction. In this case, at a plurality of separated circumferential locations, there are provided divided intervening water stop portions extending from the respective butted ends of the split body of the annular water stop portion to the inner peripheral side. And a some pair of division | segmentation intervening water stop part is pinched | interposed by the some division | segmentation molded object 201, and it maintains in the state by which the division bodies of the sealing member were faced | matched.

  Furthermore, although the grommet 10 of the form which can arrange | position the wire harness 1 inside from the side has been demonstrated, the grommet may be comprised by the inner member and seal member which are not divided | segmented into the circumferential direction. That is, the grommet may be configured by externally fitting a seal member having an integral or separate annular water stop portion 52 and an inner water stop portion 72 on the outside of the integral cylindrical inner member. In addition, since the opening part is not provided in the sealing member, the harness insertion hole 77 may not be eccentric with respect to the center of the water blocking wall 76.

  In addition, the harness insertion hole 77 in the sealing member 50 having the opening 51 has been formed at a position eccentric to the pair of split interposed water stop portions 64 with respect to the center of the water stop wall 76 so far. As described above, the water blocking wall portion 76 does not have to be eccentric as long as adhesion between the butted ends of the water blocking wall portion 76 can be secured.

  In addition, the example in which the water blocking wall portion 76 is formed in a mountain shape in cross section has been described so far, but the water blocking wall portion 76 can be elastically deformed so that the harness insertion hole portion 77 can be expanded in diameter. Good. For example, the water blocking wall portion 76 may be formed in a plate shape orthogonal to the insertion direction S.

Second Embodiment
Hereinafter, the grommet 110 which concerns on 2nd Embodiment is demonstrated (refer FIG. 10, FIG. 11). Of the grommet 110, the only difference from the configuration of the grommet 10 according to the first embodiment is the number of water blocking wall portions 76 in the seal member 150. Portions of the grommet 110 that are the same as the configuration of the grommet 10 according to the first embodiment are given the same reference numerals, and descriptions thereof are omitted.

  The sealing member 150 of the grommet 110 has a plurality (two in this case) of water blocking wall portions 76 in the inner cylindrical portion 174 of the inner water blocking portion 172. In other words, two water blocking wall portions 76 are provided in the penetration direction (insertion direction S) of the main body portion 22. The two water blocking walls 76 have a bellows shape.

  10 and 11 show an example in which two water blocking walls 76 are continuously provided in the insertion direction S, but the two water blocking walls 76 are provided separately in the insertion direction S. It may be done. Moreover, the water stop wall part 76 may be provided with three or more.

  According to the grommet 110 according to this configuration, the water stop performance can be further improved because a plurality of the water stop walls 76 are provided in the penetrating direction of the main body 22. In addition, the wire harness 1 inserted through the harness insertion hole 77 can be stably supported in a form along the insertion direction S in the inner member 20.

  Further, the grommet 110 may adopt the configuration of the modified example shown for the grommet 10 according to the first embodiment.

  As described above, the grommets 10 and 110 have been described in detail. However, the above description is an example in all aspects, and the present invention is not limited thereto. The various modifications described above can be applied in combination as long as they do not contradict each other. And it is understood that the countless modification which is not illustrated can be assumed without deviating from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Wire harness 10 Grommet 20 Inner member 22 Main body part 42 Gutter part 50 Seal member 51 Open part 52 Annular water stop part 64 Dividing intermediary water stop part 66 Water stop overhang part 76 Water stop wall part 77 Harness insertion hole part 90 Body panel 92 Through-hole part 201 Division molding

Claims (4)

A grommet that stops water in a through hole formed in a vehicle body panel through which a wire harness is inserted and routed,
A cylindrical main body part through which the wire harness can be inserted, and a flange part projecting from the main body part to the outer peripheral side and facing the opening edge of the through-hole part from one side of the vehicle body panel. A rigid inner member;
An annular water-stopping portion that is disposed on one side of the flange and that can be in close contact with the opening edge of the through-hole portion from one side of the vehicle body panel, and the wire harness can be inserted. An elastic sealing member having a water-blocking hole portion formed therein, a water blocking wall portion disposed inside the main body portion and blocking the inner side of the main body portion in a penetrating direction;
With
The water blocking wall portion is formed to be elastically deformable so that the diameter of the harness insertion hole portion can be expanded ,
The inner member is formed of a plurality of divided molded bodies arranged in the circumferential direction,
The seal member is partially separated in the circumferential direction of the annular water stop, extends from the butt end of the annular water stop to the inner peripheral side, and partially extends in the circumferential direction. Comprising at least one intervening water stop portion including a pair of split intervening water stop portions continuous to the outer peripheral portion of
The harness insertion hole is a grommet formed at a position eccentric to the butted end portion side of the pair of split interposed water stop portions . The grommet according to claim 1,
The said water stop wall part is a grommet formed in the mountain shape which has a pair of thin film part which pinched | interposed the vertex which faces an inner peripheral side in the cross sectional view orthogonal to the circumferential direction of the said main-body part. The grommet according to claim 1 or 2, wherein
The harness insertion hole is a grommet formed at a position inscribed in the outer peripheral portion of the water blocking wall portion on the abutting surface side of the pair of split interposed water blocking portions . The grommet according to any one of claims 1 to 3, wherein
The grommet in which a plurality of the water blocking wall portions are provided in the penetration direction of the main body portion .

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