JP2016025667A - Grommet and wire harness with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain an integrated state between an inner member and a seal member more securely.SOLUTION: A grommet 30 includes: an inner member 32 into which a wire harness 22 may be inserted, the inner member 32 which may engage with a peripheral part of a through hole while being inserted into the through hole of an attachment panel; a first seal part 50 formed by an elastic material which is elastically deformed more easily than the inner member 32, and closing a gap between the inner member 32 and the attachment panel; and a second seal part 60 including a cylindrical part 62 for closing a gap between the inner member 32 and the wire harness 22 and formed by an elastic material which is elastically deformed more easily than the inner member 32. At least one of the first seal part 50 and the second seal part 60 is formed by being integrated with the inner member 32 by metallic molding.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a grommet including an inner member and a seal portion formed of an elastic material.

  Patent document 1 is disclosing the grommet provided with the inner member and the sealing member. The inner member is a member formed of a synthetic resin material or the like, and plays a role of fixing the grommet to a through hole formed in the mounting panel. The seal member is a member formed of an elastic material such as rubber and plays a role of stopping water between the respective parts.

JP 2013-225957 A

  However, according to the technique disclosed in Patent Document 1, the inner member and the seal member that are separately formed are combined. For this reason, there exists a possibility that position shift, separation, etc. may occur between the inner member and the seal member.

  Then, an object of this invention is to be able to keep an inner member and a sealing member in a union state more reliably.

  In order to solve the above-mentioned problem, the first aspect is a grommet that is attached to a through hole formed in a mounting panel in a state of being externally mounted on a wire harness, and the wire harness can be inserted into the through hole. An inner member that can be locked to the peripheral portion of the through hole in the inserted state, and a first seal that is formed of an elastic material that is more easily elastically deformed than the inner member and closes between the inner member and the mounting panel And a second seal part including a cylindrical part for closing a gap between the inner member and the wire harness, and formed of an elastic material that is more elastically deformable than the inner member. At least one of the seal portion and the second seal portion is formed by integrating with the inner member by molding.

  A second aspect is the grommet according to the first aspect, wherein the first seal part includes an annular seal part that can contact the mounting panel on an outer periphery of the through hole, and the inner member is the through hole. A cylindrical main body portion that can be disposed in the hole; a base end portion connected to the cylindrical main body portion; a distal end portion that can be displaced inward and outward of the cylindrical main body portion; and the annular seal portion. A locking piece that can be locked to the peripheral portion of the through hole in a state of being pressed against a portion around the through hole of the mounting panel, and provided to fill the periphery of the locking piece, A third seal portion is formed of an elastic material that is more easily elastically deformed than the inner member, and is formed by being integrated with the inner member by molding.

  A 3rd aspect is a grommet concerning the 2nd aspect, Comprising: The part which fills the circumference | surroundings of the front-end | tip side of the said locking piece among said 3rd seal | stickers extends along the axial direction of the said cylindrical main-body part. A first portion that is present and a second portion that is bent from the first portion and extends along the radial direction of the cylindrical main body.

  A 4th aspect is a grommet concerning the 2nd or 3rd aspect, Comprising: The connection position of the said annular seal part with respect to the said inner member, and the connection position of the said cylindrical part with respect to the said inner member are said inner members. It is in the positional relationship which pinches | interposes the said locking piece along the axial direction.

  A fifth aspect is a grommet according to any one of the first to fourth aspects, and is formed of an elastic material that is more elastically deformable than the inner member, and is molded with respect to the inner member. The part formed by integrating by means of double molding or insert molding.

  The wire harness with a grommet which concerns on a 6th aspect is provided with the grommet which concerns on any one 1st-5th aspect, and the wire harness fixed to the said grommet in the state inserted in the said inner member.

  According to the first to sixth aspects, since at least one of the first seal portion and the second seal portion is integrated with the inner member by molding, the first seal portion and the second seal portion. At least one of them and the inner member can be more reliably kept in a combined state.

  According to the second aspect, the third seal portion can suppress the intrusion of water through the surrounding gap while keeping the locking piece elastically deformable.

  According to the third aspect, the portion of the third seal portion that fills the periphery of the front end side of the locking piece is the first portion that extends along the axial direction of the cylindrical main body portion and the first portion thereof. And the second portion extending along the radial direction of the cylindrical main body portion. Therefore, the distal end portion of the locking piece can be easily displaced in the inner and outer directions of the cylindrical main body portion. .

  According to the fourth aspect, a position where the coupling position of the annular seal portion with respect to the inner member and the coupling position of the cylindrical portion with respect to the inner member sandwich the locking piece along the axial direction of the inner member. If there is a relationship, it is preferable to stop water through the periphery of the locking piece. In this case, therefore, the third seal portion fills the periphery of the locking piece, thereby effectively increasing the water stop.

  According to the 5th aspect, a seal part and an inner member can be integrated more reliably.

It is a schematic perspective view which shows a wire harness with a grommet. It is a schematic perspective view which shows a wire harness with a grommet. It is a schematic end view which shows the state which attached the wire harness with a grommet to the attachment panel. It is a perspective view which shows a grommet. It is a perspective view which shows a grommet. It is a perspective view which shows the grommet in the state before attaching to a wire harness. It is sectional drawing which shows the grommet in the state before attaching to a wire harness. It is a perspective view which shows an inner member. It is a perspective view which shows an inner member. It is a perspective view which shows the grommet which abbreviate | omitted the 2nd seal part. It is a perspective view which shows the grommet which abbreviate | omitted the 2nd seal part. It is a fragmentary sectional view of a grommet.

  Hereinafter, the grommet and the wire harness with a grommet according to the embodiment will be described.

<Overall configuration>
First, the whole structure of the wire harness with a grommet is demonstrated. 1 and 2 are schematic perspective views showing the wire harness 20 with grommet, and FIG. 3 is a schematic end view showing a state in which the wire harness 20 with grommet is attached to the attachment panel 10.

  The grommet-equipped wire harness 20 includes a wire harness 22 and a grommet 30. The grommet 30 is a member that is attached to the through-hole 12 formed in the mounting panel 10 in a state of being covered with the wire harness 22 (see FIG. 3). In this state, the grommet 30 closes the space between the through hole 12 and the wire harness 22 and suppresses the intrusion of water passing between them.

  Here, as the mounting panel 10, a vehicle body panel or the like that partitions the engine room and the vehicle interior is assumed. A through hole 12 for routing the wire harness 22 is formed in the mounting panel 10. Although the through-hole 12 is circular here, it does not necessarily need to be circular. Moreover, although the burring part 12a which protrudes to the one surface side of the attachment panel 10 is formed in the peripheral part of the through-hole 12 here, this burring part 12a does not need to be.

  The wire harness 22 has a configuration in which a plurality of electric wires 24 are bundled. In addition, although the electric wire 24 which comprises the wire harness 22 is shown in FIG. 1, the external shape of the wire harness 22 is shown by the other figure. The wire harness 22 may include an optical cable or the like. Moreover, the electric wires 24 included in the wire harness 22 may be branched at an intermediate portion in the extending direction of the wire harness 22. But the part penetrated by the grommet 30 among the wire harnesses 22 is made into the form bundled together. This wire harness 22 is used, for example, as a wiring material for connecting various electrical components on the engine side and electrical components on the passenger compartment side.

  A portion of the wire harness 22 that extends from the grommet 30 is covered with a corrugated tube 80. The corrugated tube 80 is fixed to the grommet 30 by a corrugated tube fixing component 90.

<Grommet>
4 and 5 are perspective views showing the grommet 30. FIG. 4 and 5 show a state in which the cylindrical portion 62 is deformed by a reduced diameter. The wire harness 22 is omitted in FIGS. FIG. 6 is a perspective view showing the grommet 30, and FIG. 7 is a cross-sectional view of the grommet 30 cut along a plane along its central axis. 6 and 7 show a state before the cylindrical portion 62 undergoes the diameter reduction deformation.

  As shown in FIGS. 1 to 7, the grommet 30 includes an inner member 32, a first seal portion 50, a second seal portion 60, and a third seal portion 70.

  The inner member 32 is made of a material having higher rigidity than the elastic material forming the first seal portion 50, the second seal portion 60, and the third seal portion 70, for example, a resin such as polypropylene (PP). The inner member 32 can be inserted into the wire harness 22 and can be locked to the peripheral edge of the through hole 12 in a state of being inserted into the through hole 12.

  More specifically, the inner member 32 is formed in a cylindrical shape. The outer dimension of the inner member 32 is smaller than that of the through hole 12. Preferably, the outer diameter of the inner member 32 is set to a size that allows the inner member 32 to be fitted in a state in which rattling is suppressed. Further, the inner diameter of the inner member 32 is a diameter of a circle circumscribing each electric wire 24 on the outer peripheral side when a cross section of the wire harness 22 (a cross section in a direction orthogonal to the axis of the wire harness 22) is observed. Hereinafter, it is larger than the outer dimensions of the wire harness 22. For this reason, the wire harness 22 can be passed through the inner member 32. The inner diameter of the inner member 32 is preferably set to a size that allows the connector at the end of the wire harness 22 to pass through.

  Further, the inner member 32 is formed with a locking piece 40, and the locking piece 40 can be locked to the peripheral edge of the through hole 12 from one side in the axial direction of the through hole 12. ing.

  The first seal portion 50, the second seal portion 60, and the third seal portion 70 are formed of an elastic material that is more easily elastically deformed than the inner member 32, such as rubber. Each of these parts mainly plays a role of suppressing passage of water through each part.

  First, the first seal portion 50 is a portion that closes the space between the inner member 32 and the mounting panel 10. Here, the first seal portion 50 is formed so as to protrude outward from one end portion of the outer peripheral portion of the inner member 32. The first seal portion 50 is pressed from the side opposite to the direction in which the locking piece 40 is locked to the mounting panel 10 at the peripheral portion of the through hole 12. Thereby, the 1st seal | sticker part 50 block | closes between the inner member 32 and the attachment panel 10, and suppresses the penetration | invasion of the water which passed between them.

  The second seal portion 60 is a portion that closes the space between the inner member 32 and the wire harness 22. Here, the second seal portion 60 includes a cylindrical portion 62 connected to the other end portion of the inner member 32. Then, in a state where the wire harness 22 is passed through the cylindrical portion 62, the cylindrical portion 62 surrounds the outer periphery of the wire harness 22, and between the inner peripheral portion of the cylindrical portion 62 and the outer peripheral portion of the wire harness 22. Eliminate as much as possible. Thereby, the 2nd seal | sticker part 60 block | closes between the inner member 32 and the wire harness 22, and suppresses the penetration | invasion of the water which passed between them.

  The third seal portion 70 is a portion provided so as to fill a gap around the locking piece 40. That is, in order to make the locking piece 40 elastically deformable, a part of the peripheral edge of the locking piece 40 is separated from the periphery thereof. For this reason, a gap is generated around the locking piece 40. Therefore, the third seal portion 70 is provided so as to fill the gap.

  Each of the above parts will be described more specifically.

<Inner member>
8 and 9 are perspective views showing the inner member 32. FIG.

  As shown in FIGS. 1 to 9, the inner member 32 includes a cylindrical main body portion 34, a locking piece 40, and an overhang portion 46. The inner member 32 itself is a part that is integrally molded by injecting softened resin into the mold.

  The cylindrical main body 34 is formed in a cylindrical shape. Here, it is formed in a cylindrical shape in accordance with the shape of the through hole 12. The outer dimension of the cylindrical main body 34 is smaller than that of the through-hole 12, and is preferably set to a size that allows the through-hole 12 to be fitted and disposed in a state in which rattling is suppressed. The length of the cylindrical main body 34 in the axial direction of the cylindrical main body 34 is set to a size that can project to both sides of the mounting panel 10. The inner diameter dimension of the cylindrical main body 34 is larger than the outer dimension of the wire harness 22, and is preferably set to a size that allows the connector at the end of the wire harness 22 to be inserted.

  A plurality of locking pieces 40 are provided on the outer peripheral portion of the cylindrical main body 34 at intervals along the circumferential direction. Here, the locking pieces 40 are provided at three positions on the outer peripheral portion of the cylindrical main body portion 34 at equal intervals.

  The locking piece 40 includes an elongated plate-like elastic deformation piece 42 and a protrusion 44.

  The elastic deformation piece 42 is disposed in a posture along the axial direction of the cylindrical main body 34 with respect to the outer peripheral portion of the cylindrical main body 34. The base end portion of the elastic deformation piece 42 is integrally connected to the cylindrical main body portion 34. Both side portions of the elastic deformation piece 42 are separated from the cylindrical main body portion 34 through a linear gap. The distal end portion of the elastic deformation piece 42 is a free end that is not connected to the cylindrical main body portion 34. For this reason, the elastic deformation piece 42 can be elastically deformed so that the base end portion thereof is used as a support location and the tip end portion thereof is displaced inward and outward of the cylindrical main body portion 34.

  Further, the protruding portion 44 is a portion that is formed to protrude toward the outward surface side of the elastic deformation piece 42. Here, the protrusion 44 is provided at a position closer to the tip than the intermediate portion in the extending direction of the elastic deformation piece 42. The surface of the protrusion 44 that faces the proximal end portion of the elastic deformation piece 42 is formed as an inclined surface 44 f 1 that is inclined inward toward the proximal end portion of the elastic deformation piece 42. The surface of the protrusion 44 that faces the tip of the elastic deformation piece 42 is formed on a contact surface 44f2 that is orthogonal to the extending direction of the elastic deformation piece 42 (see FIGS. 7 to 9 and 12). .

  Then, when the other end portion (the left side in FIGS. 1 and 8) of the inner member 32 is inserted and pushed into the through hole 12, the inclined surface 44 f 1 of the protruding portion 44 comes into contact with the peripheral portion of the through hole 12. Thereby, the elastic deformation piece 42 is elastically deformed inside the inner member 32. When the inner member 32 is further pushed in and the protruding portion 44 gets over the peripheral edge of the through hole 12, the elastic deformation piece 42 is deformed so as to return to the original shape, and the contact surface 44 f 2 of the protruding portion 44 is formed on the through hole 12. The peripheral edge is locked to the mounting panel 10 from one direction.

  The overhanging portion 46 is a portion formed so as to project outward from one end portion (the right side in FIG. 8) of the outer peripheral portion of the cylindrical main body portion 34. In addition, since the one end part of the cylindrical main-body part 34 does not exist in the part in which the elastic deformation piece 42 was formed, the overhang | projection part 46 is not formed in these corresponding parts.

  The overhang portion 46 serves to reinforce the first seal portion 50 formed so as to cover the overhang portion 46.

<First seal part>
10 and 11 are perspective views showing the grommet 30. FIG. 10 and 11, the second seal portion 60 is omitted.

  As shown in FIGS. 1 to 11, the first seal portion 50 is a portion that closes between the inner member 32 and the mounting panel 10, and includes an annular seal portion 52 and an inner peripheral side annular seal portion 53.

  More specifically, the first seal part 50 includes an annular seal part 52, an inner circumferential side annular seal part 53, and a flange-like part 56.

  The annular seal portion 52 is formed in a skirt shape extending from one end portion of the outer peripheral portion of the inner member 32 to the outer side in the radial direction and extending toward the other end portion side of the inner member 32. The annular seal portion 52 is formed on the entire outer periphery of the inner member 32 regardless of whether or not the elastic deformation piece 42 is formed. The outer dimension of the outermost peripheral part of the annular seal part 52 is larger than the inner diameter dimension of the through hole 12. Therefore, the outermost peripheral portion of the annular seal portion 52 can contact the mounting panel 10 on the outer periphery of the through hole 12. Here, the locking piece 40 can be locked to the peripheral edge portion of the through hole 12 in a state where the annular seal portion 52 is pressed against a portion of the mounting panel 10 around the through hole 12. In this state, the peripheral portion of the through hole 12 in the mounting panel 10 is in a state of being sandwiched between the protrusion 44 of the locking piece 40 and the outermost peripheral portion of the annular seal portion 52.

  Further, the hook-like portion 56 is formed in an annular portion that projects from the one end portion of the outer peripheral portion of the inner member 32 outward in the radial direction. The corrugated tube fixing component 90 is fixed to the bowl-shaped portion 56.

  Further, the inner circumferential side annular seal portion 53 is formed in an annular portion that projects outward in the radial direction from a portion located on the inner circumferential side of the burring portion 12 a of the through hole 12 in the outer circumferential portion of the inner member 32. Then, with the inner member 32 being passed through the through-hole 12, the inner circumferential side annular seal portion 53 comes into contact with the inner circumferential surface of the burring portion 12a.

  That is, both the annular seal portion 52 and the inner circumferential annular seal portion 53 block between the inner member 32 and the mounting panel 10. Although only one side of the annular seal portion 52 and the inner peripheral side annular seal portion 53 may be provided, if both the annular seal portion 52 and the inner peripheral side annular seal portion 53 are provided, the inner member 32 and the attachment are attached. The space between the panel 10 can be more reliably closed.

  The first seal portion 50 is formed by being integrated with the inner member 32 by molding. That is, in the state where the inner member 32 is disposed in the mold for forming the first seal portion 50, the elastic material for forming the first seal portion 50 in the mold (at this time by heating) The first seal portion 50 is formed by injecting (melting or softening) and then cooling and hardening.

  The first seal portion 50 is preferably integrated with the inner member 32 by die molding by a double mold. In the double mold, a plurality of molds are used to mold the inner member 32, which is a first molded product, and then a part of the plurality of molds are used as they are and the inner member 32 is attached to the mold. In this method, the remaining mold is left as it is, the remaining mold is replaced with another mold for molding the secondary molded product, and the first seal portion 50 as the secondary molded product is molded in this state. . This double mold includes two-color molding.

  Moreover, the 1st seal | sticker part 50 may be integrated with the inner member 32 by metal mold | die molding by insert molding which uses the inner member 32 as an insert component. Insert molding is a method in which the molded inner member 32 is fixed in another mold as an insert part, and the first seal portion 50 is molded in this state.

  In any case, the first seal portion 50 is more reliably integrated with the inner member 32. However, in the double mold, the first seal portion 50 is more reliably integrated with the inner member 32.

<Second seal part>
As shown in FIGS. 1 to 7, the second seal portion 60 includes a tubular portion 62 for closing the space between the inner member 32 and the wire harness 22. More specifically, the cylindrical portion 62 includes a tapered portion 63 and a reduced diameter deforming portion 64.

  The tapered portion 63 is formed in a shape that gradually decreases in diameter from the other end portion of the inner peripheral portion of the inner member 32 toward one end portion of the inner member 32. In addition, the thickness dimension of the largest diameter part among the taper-shaped parts 63 is set larger than the thickness dimension of another part. Thereby, the tapered portion 63 is joined to the inner member 32 with a larger area.

  The reduced diameter deforming portion 64 is formed in a cylindrical shape in which the same diameter portion continues along the axial direction. The inner diameter dimension of the reduced diameter deforming portion 64 is set to be larger than the outer dimension of the wire harness 22 so that the wire harness 22 can be easily passed through the reduced diameter deforming portion 64. The inner diameter dimension of the reduced diameter deforming portion 64 is preferably set such that the connector at the end of the wire harness 22 can pass through.

  However, the outer dimension of the reduced diameter deforming portion may be set to be the same as or smaller than the outer dimension of the wire harness 22. Even in this case, since the reduced diameter deformed portion is formed of an elastic material, the wire harness can be passed through the reduced diameter deformed portion by expanding the deformed diameter deformed portion.

  Further, here, the second seal portion 60 is connected to the other end portion of the inner member 32, and extends outward from one end portion of the inner member 32 through the inner member 32. Therefore, a portion of the cylindrical portion 62 that gradually decreases in diameter can be disposed in the inner member 32. But the 2nd seal part may be connected to the position from the one end part of inner member 32, and may extend from one end part of inner member 32 from there.

  The wire harness 22 is inserted and fixed to the second seal part 60 as follows.

  That is, the wire harness 22 is passed through the second seal portion 60. Since the second seal portion 60 is formed of an elastic material, the second seal portion 60 is reduced in diameter so that the inner peripheral surface of the second seal portion 60 is brought into close contact with the outer peripheral portion of the wire harness 22 as much as possible. be able to.

  Here, after passing the wire harness 22 through the second seal portion 60, a portion around the outer periphery of the reduced diameter deformable portion 64 is picked out outward in the radial direction, and the portion is folded on the other portion. By doing so, the diameter-reducing deformation portion 64 is deformed by a reduced diameter (see FIGS. 2 and 5). In this state, the reduced diameter deformation state maintaining member maintains the second seal portion 60 in a reduced diameter deformation state so as to be in close contact with the outer periphery of the wire harness 22. Here, the reduced diameter deformed state maintaining member is the adhesive tape T wound around the outer periphery of the reduced diameter deformed portion 64. As the reduced diameter deformation state maintaining member, a binding band or the like can also be used.

  In addition, the reduced diameter deforming portion may be deformed to reduce the diameter by twisting.

  Similar to the first seal portion 50, the second seal portion 60 is formed by being integrated with the inner member 32 by molding. Since the first seal portion 50 and the second seal portion 60 are formed of the same elastic material, it is preferable that the first seal portion 50 and the second seal portion 60 be molded in the same process.

  The second seal portion 60 is preferably more integrated with the inner member 32 by double molding or insert molding.

<Third seal part>
As shown in FIGS. 1 to 7, 10, and 11, the third seal portion 70 is provided so as to fill the periphery of the locking piece 40.

  That is, as already described, the annular seal portion 52 of the first seal portion 50 is provided at one end portion of the inner member 32, and the cylindrical portion 62 of the second seal portion 60 is connected to the other end portion of the inner member 32. Has been. For this reason, the connection position of the annular seal portion 52 with respect to the inner member 32 and the connection position of the tubular portion 62 with respect to the inner member 32 are in a positional relationship that sandwiches the locking piece 40 along the axial direction of the inner member 32. For this reason, in order to stop water more reliably between both surfaces of the mounting panel 10, it is necessary to stop water also in the inner member 32. Here, a locking piece 40 is formed on the inner member 32, and a gap is provided around the locking piece 40. In order to fill this gap, the third seal portion 70 is provided.

  More specifically, both side portions of the locking piece 40 are separated from the cylindrical main body portion 34 via a gap. For this reason, the 3rd seal | sticker part 70 contains the part 71 which fills the both sides of the said locking piece 40 (refer FIG. 11).

  Further, the distal end portion of the locking piece 40 is separated from the cylindrical main body portion 34 and is also separated from the annular seal portion 52. Therefore, the third seal portion 70 includes a portion 72 that fills the gap on the distal end side of the locking piece 40 (see FIGS. 11 and 12).

  Since the third seal portion 70 is formed of an elastic material, the locking piece 40 can be elastically deformed in the inner and outer directions of the inner member 32 even when the gap is filled.

  But it is preferable that the 3rd seal | sticker part 70 is set as the structure which does not prevent the elastic deformation of the latching piece 40 as much as possible.

  For example, the width of the gap on both sides of the locking piece 40 is preferably as large as possible in consideration of the amount of elastic deformation of the locking piece 40.

  Here, as shown in FIGS. 11 and 12, a portion 72 of the third seal portion 70 that fills the periphery of the distal end side of the locking piece 40 extends along the axial direction of the cylindrical main body portion 34. The first portion 72a and the second portion 72b bent from the first portion 72a and extending along the radial direction of the cylindrical main body 34 are configured.

  Here, the first portion 72 a extends from the distal end portion of the locking piece 40 to a position just before the edge portion of the one end portion of the cylindrical main body portion 34. A second portion 72 b extends from the end portion toward the radially outer side of the cylindrical main body portion 34, and is connected to the inner peripheral side portion of the annular seal portion 52. The second portion 72b is formed thinner than the peripheral portion thereof, and can be easily elastically deformed.

  As described above, the portion 72 of the third seal portion 70 includes the first portion 72a and the portion facing the radially outer side of the inner member 32 from the first portion 72a. When trying to elastically deform so that the portion is displaced radially inward of the inner member 32, the first portion 72a and the second portion 72b can be linearly extended. Thereby, the elastic deformation of the locking piece 40 can be prevented as much as possible, and an increase in mounting load required when the grommet 30 is mounted in the through hole 12 can be suppressed.

<Corrugated tube>
As shown in FIGS. 1 to 3, the corrugated tube 80 is a member formed of a resin or the like, and is a member in which a large annular portion and a small annular portion are alternately formed along the extending direction. The corrugated tube 80 can be easily bent and deformed by deforming a portion between the large annular portion and the small annular portion. In order to easily dispose the wire harness 22 in the corrugated tube 80, it is preferable that the corrugated tube 80 is formed with a slit along the extending direction thereof.

  The corrugated tube 80 is covered with the cylindrical portion 62 of the second seal portion 60 so as to cover at least a part of the portion of the second seal portion 60 that is reduced in diameter. More specifically, one end portion of the corrugated tube 80 enters the inner member 32 and covers the proximal end portion of the reduced diameter deforming portion 64 of the cylindrical portion 62. Further, the other end portion of the corrugated tube 80 extends outward from the inner member 32 and covers up to the front end of the reduced diameter deforming portion 64 of the cylindrical portion 62. The corrugated tube may cover the entire extending direction of the reduced diameter deforming portion.

<Corrugated tube fixing parts>
The corrugated tube 80 is fixed to the grommet 30 by a corrugated tube fixing component 90.

  The corrugated tube fixing component 90 is a member having an annular shape as a whole, and is a member divided into divided components 91A and 91B along a surface along the axial direction thereof. Each of the divided parts 91A and 91B is a part integrally molded with a resin.

  Each divided component 91A, 91B includes divided annular fixing portions 92A, 92B and divided tube fixing portions 94A, 94B, respectively.

  The divided annular fixing portions 92A and 92B are members formed in a semi-annular shape corresponding to the outer shape of the flange-shaped portion 56, and an arc shape in which the outer peripheral edge portion of the flange-shaped portion 56 can be fitted into the inner peripheral portion thereof. Grooves 92Ag and 92Bg are formed.

  The divided tube fixing portions 94A and 94B are members formed in a semi-cylindrical shape corresponding to the outer shape of the corrugated tube 80. Portions 94Ap and 94Bp are formed.

  Disc-shaped connecting portions 93A and 93B are provided at one end portions of the divided tube fixing portions 94A and 94B so as to protrude to the outer peripheral side, and the divided annular fixing portions 92A and 92A are provided on the outer peripheral portions of the connecting portions 93A and 93B. 92B is provided.

  Further, fixed pieces 96A and 96B are provided on one side in the circumferential direction of the divided parts 91A and 91B, and receiving portions 97A and 97B are provided on the other side. Here, fixing pieces 96A and 96B are provided on one end side in the circumferential direction of the divided tube fixing portions 94A and 94B so as to protrude outward. Protrusions are provided at the tips of the fixing pieces 96A and 96B. In addition, receiving portions 97A and 97B capable of retaining and locking the fixing pieces 96A and 96B are provided at the other ends in the circumferential direction of the divided tube fixing portions 94A and 94B. The receiving portions 97A and 97B have locking holes into which the fixing pieces 96A and 96B can be inserted. When the fixing pieces 96A and 96B are inserted into the locking holes, the protrusions of the fixing pieces 96A and 96B are The locking hole is secured to the peripheral edge of the locking hole so that the locked state of both is maintained.

  Then, with the corrugated tube 80 covered on the cylindrical portion 62 as described above, the hook-shaped portion 56 is sandwiched between the divided annular fixing portions 92A and 92B, and the corrugated tube is interposed between the divided tube fixing portions 94A and 94B. The two divided parts 91A and 91B are combined so that 80 is sandwiched, and the fixing pieces 96A and 96B are secured to the receiving portions 97A and 97B. Thereby, both the divided parts 91 </ b> A and 91 </ b> B are in a state in which the flange-like portion 56 of the grommet 30 and the corrugated tube 80 are fixed.

<Effects>
According to the grommet 30 and the grommet-equipped wire harness 20 configured as described above, the first seal portion 50, the second seal portion 60, and the third seal portion 70 are integrated with the inner member 32 by molding. Therefore, the first seal portion 50, the second seal portion 60, the third seal portion 70, and the inner member 32 can be more reliably maintained in the combined state.

  For this reason, as is conventionally done, the uniting operation between the inner member and the sealing member formed of an elastic material becomes unnecessary, and the positional shift between the two after the uniting and the dropping of the sealing member are suppressed. .

  Further, when the grommet 30 is attached to the mounting panel 10, when the protruding portion 44 of the locking piece 40 gets over the peripheral edge of the through hole 12 and returns to its original shape, the protruding portion of the locking piece 40. The tip side portion from 44 comes into contact with the peripheral edge portion of the through hole 12, thereby generating a sound. With this sound, it can be confirmed more reliably whether or not the grommet 30 is attached to the attachment panel 10.

  In addition, since the gap around the locking piece 40 is filled with the third seal portion 70 formed of an elastic material, water can enter through the surrounding gap while keeping the locking piece 40 elastically deformable. Can be suppressed.

  In addition, a portion 72 of the third seal portion 70 that fills the gap at the tip end portion of the locking piece 40 includes a first portion 72a that extends along the axial direction of the cylindrical main body portion 34, and a first portion 72a thereof. And the second portion 72b that is bent from the portion 72a and extends along the radial direction of the cylindrical main body portion 34. Therefore, by deforming the portion 72 in a straight line, the distal end portion of the locking piece 40 is The main body 34 can be easily displaced in the inner and outer directions.

  Further, when the connection position of the annular seal portion 52 with respect to the inner member 32 and the connection position of the cylindrical portion 62 with respect to the inner member 32 are in a positional relationship that sandwiches the locking piece 40 along the axial direction of the inner member 32, In order to stop the water between both sides of the panel 10, it is preferable to stop the water around the locking piece 40 of the inner member 32. For this reason, as described above, by filling the gap around the locking piece 40 with the third seal portion 70, it is possible to effectively increase the waterstop between the both surfaces of the mounting panel 10.

<Modification>
In the above embodiment, the first seal portion 50 and the second seal portion 60 have been described as being integrated with the inner member 32 by molding, but the first seal portion and the second seal portion are described. At least one of them may be integrated with the inner member by molding. In this case, the first seal portion and the second seal portion that are not integrated with the inner member by mold molding may be combined with the inner member by a fitting structure or the like.

  Further, it is not essential that the third seal portion 70 is provided. For example, if the connecting position of the annular seal portion with respect to the inner member and the connecting position of the cylindrical portion with respect to the inner member are on one side with respect to the locking piece along the axial direction of the inner member, Even if the gap remains, water can be sufficiently stopped between the both surfaces of the mounting panel 10.

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

DESCRIPTION OF SYMBOLS 10 Mounting panel 12 Through-hole 20 Wire harness with grommet 22 Wire harness 30 Grommet 32 Inner member 34 Cylindrical main-body part 40 Locking piece 50 1st seal part 52 Annular seal part 60 2nd seal part 62 Cylindrical part 64 Reduced diameter deformation Part 70 Third seal part 72a First part 72b Second part

Claims (6)

A grommet that is attached to a through-hole formed in a mounting panel in a state of being sheathed on a wire harness,
An inner member that can be inserted into the through-hole and can be locked to the peripheral edge of the through-hole in a state in which the wire harness can be inserted;
A first seal portion that is formed of an elastic material that is more easily elastically deformed than the inner member, and that blocks between the inner member and the mounting panel;
A second seal portion including a cylindrical portion for closing between the inner member and the wire harness, and formed of an elastic material that is more easily elastically deformed than the inner member;
With
A grommet in which at least one of the first seal portion and the second seal portion is formed by integrating with the inner member by molding. The grommet according to claim 1,
The first seal portion includes an annular seal portion that can contact the mounting panel on an outer periphery of the through-hole,
The inner member can be disposed in the through-hole, and a base end portion is connected to the cylindrical main body portion, and a distal end portion is displaceable in the inner and outer directions of the cylindrical main body portion. And an engagement piece that can be engaged with a peripheral portion of the through-hole in a state in which the annular seal portion is pressed against a portion of the mounting panel around the through-hole,
A third portion is formed by filling the periphery of the locking piece and is made of an elastic material that is more easily elastically deformed than the inner member, and is integrated with the inner member by molding. Grommet further provided with a seal part. The grommet according to claim 2,
A portion of the third seal portion that fills the periphery of the front end side of the locking piece is bent from the first portion extending along the axial direction of the cylindrical main body portion and the first portion. And a second portion extending along the radial direction of the main body portion. The grommet according to claim 2 or claim 3, wherein
The grommet in which the connection position of the annular seal portion with respect to the inner member and the connection position of the cylindrical portion with respect to the inner member are in a positional relationship sandwiching the locking piece along the axial direction of the inner member. The grommet according to any one of claims 1 to 4, wherein
The grommet is formed of an elastic material that is more easily elastically deformed than the inner member, and a portion formed by integrating the inner member by mold molding is formed by double molding or insert molding. . The grommet according to any one of claims 1 to 5,
A wire harness fixed to the grommet in a state of being inserted into the inner member;
Wire harness with grommet.

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