JP2013038981A - Grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a water cut-off performance more stably.SOLUTION: A grommet 20 comprises: a seal member 30; and a holding member 50 attached to the seal member 30. The seal member 30 comprises: a cylindrical part 32 passing through a wire harness 1 and stickable partly to a periphery of the wire harness 1 in a passing through direction; and an annular inner periphery seal part 42 provided on a tip side of the cylindrical part 32 and stickable to an inner periphery of the burring part 14 from the inner periphery. The holding member 50 comprises: a cylindrical seal pressing part 54 arranged in the inner periphery side of the inner periphery seal part 42 and capable of pressing the inner periphery seal part 42 to an inner periphery of the burring part 14; a first pressing part 56 formed in a form of jutting out from the outer periphery part of the seal pressing part 54 and capable of being locked to a tip of the burring part 14 indirectly; and a second pressing part 66 capable of being locked to an opening edge of the through hole part 12 from a base end side of the burring part 14.

Description

  The present invention relates to a water stop technique in a through hole for inserting a wire harness formed in a metal panel or the like of an automobile.

  Patent Document 1 discloses a grommet for stopping water in a through hole formed in a wall portion for inserting a wire harness. The through-hole targeted in Patent Document 1 is a burring hole having a burring portion. This grommet includes an outer member made of an elastic material and an inner member made of a rigid material. The outer member has a short cylindrical large-diameter cylindrical portion with one open end and the other closed end, and an elliptical annular lip projecting radially outward around the entire edge of the open end of the large-diameter cylindrical portion And an elliptical annular hole end abutting portion protruding radially inward from the vicinity of the base end portion of the lip portion, and a fitting groove formed between the closed end and the hole end abutting portion Yes. Further, the inner member is formed in an elliptical annular shape having a linear frame portion and a semicircular frame portion, and an elliptical annular lip presser projecting radially outward on the entire circumference of the linear frame portion and the semicircular frame portion; A fixing claw having a locking surface that abuts against the wall portion in the vicinity of both ends of the linear frame portion, a spacing portion of the fixing locking claw in the linear frame portion, and an auxiliary locking claw provided in the semicircular frame portion. Have. The fixing locking claw and the auxiliary locking claw are formed so as to bend radially inward.

  The inner member is assembled to the outer member by fitting the lip pressing portion into the fitting groove. Then, by inserting the inner member into the through-hole, the fixing locking claw and the auxiliary locking claw bend radially inward and then return to the original shape and locked to the wall portion, and the lip portion is the wall The hole end abutting portion is pressed against the burring portion.

JP-A-9-63385

  However, since the grommet of Patent Document 1 has a lip portion and a hole end abutting portion that are brought into close contact with each other in the mounting direction with respect to the through hole portion to ensure water tightness, the outer member and the inner member are manufactured. In addition to the product error, the elasticity of the lip part and the hole end contact part due to the influence of the pressing force on the through-hole part, the error in the attachment direction due to the attachment aspect such as the locking aspect of the fixing locking claw and auxiliary locking claw The amount of deformation is relatively easy to change. For this reason, there existed a possibility that dispersion | variation might arise in the water stop performance by a grommet.

  Then, an object of this invention is to ensure the water stop performance more stably.

  A 1st aspect is a grommet for aiming at a water stop in the through-hole part for wire harness penetration which has a cylindrical inner peripheral part, Comprising: The said wire harness can be penetrated, and the said wire harness is partially in the penetration direction A seal member having a cylindrical portion that can be in close contact with the outer peripheral portion of the tube and an annular inner peripheral seal portion that is provided on the distal end side of the cylindrical portion and can be in close contact with the inner peripheral portion of the through-hole portion from the inner peripheral side A cylindrical seal pressing portion disposed on the inner peripheral side of the inner peripheral seal portion and capable of pressing the inner peripheral seal portion against the inner peripheral portion of the through-hole portion, and an outer periphery from the outer peripheral portion of the seal pressing portion A first pressing portion that is formed in a shape projecting to the side and can be directly or indirectly locked with respect to the opening edge portion of the through-hole portion from one side in the penetrating direction; and the opening edge portion of the through-hole portion Lock directly or indirectly from the other side in the penetration direction And a potential of the second holding portion, and a fixing member attached to the sealing member.

  A 2nd aspect is a grommet which concerns on a 1st aspect, Comprising: The said inner peripheral seal part has an inner peripheral convex part which protrudes in the outer peripheral side and extends along the circumferential direction.

  A 3rd aspect is a grommet concerning the 1st or 2nd aspect, Comprising: The said sealing member is the cyclic | annular outer periphery which can contact | adhere from the outer peripheral side with respect to the outer peripheral part of the cylindrical standing wall part of the said through-hole part. It further has a seal part.

  A fourth aspect is the grommet according to any one of the first to third aspects, wherein the seal member is provided on a distal end side of the cylindrical portion and penetrates an opening edge portion of the through-hole portion. The first holding portion is indirectly connected to the opening edge portion of the through hole portion from the one side in the penetrating direction via the restricted portion. It can be locked.

  A fifth aspect is the grommet according to any one of the first to fourth aspects, wherein the fixing member is configured by combining a first fixing part and a second fixing part, and the first fixing part. Is disposed on the inner peripheral side of the seal member, and includes the seal pressing portion, the first pressing portion, and a first engagement portion provided in the seal pressing portion, and the second fixing portion. Is provided in the main body portion, the second pressing portion formed in a shape projecting from the main body portion to the outer peripheral side, and the seal pressing portion and the first engaging portion. And a second engaging portion that can be engaged so as not to be separated by being close to each other in the central axis direction of the main body portion.

  A 6th aspect is a grommet concerning the 5th aspect, Comprising: The said 2nd fixing | fixed part is fixed to the said 2nd pressing part, and contacts from the penetration direction other side with respect to the opening edge part of the said through-hole part. It has a possible annular sound insulation.

  A seventh aspect is the grommet according to any one of the first to fourth aspects, wherein the seal member is formed in a shape projecting from the inner peripheral seal portion to the outer peripheral side, and the opening of the through hole portion. It further has a locking contact portion that can contact the edge portion from the other side in the penetrating direction, the inner peripheral seal portion of the seal member is provided on the outer peripheral side of the cylindrical portion, and the fixing member is A seal pressing portion, the first pressing portion, and a shape projecting from the outer peripheral portion of the seal pressing portion to the outer peripheral side, with respect to the opening edge portion of the through-hole portion via the locking contact portion A second pressing portion that can be locked from the other side in the penetrating direction, and the seal pressing portion and the second pressing portion are inserted between the cylindrical portion and the inner peripheral seal portion.

  According to the grommet which concerns on a 1st aspect, it is provided with the sealing member and the fixing member attached to a sealing member, and the sealing member can insert a wire harness, and is a cylinder which can adhere to the outer peripheral part of a wire harness partially in an insertion direction. And an annular inner peripheral seal portion that is provided on the distal end side of the cylindrical portion and can be in close contact with the inner peripheral portion of the through-hole portion from the inner peripheral side. A cylindrical seal pressing part that is arranged on the peripheral side and can press the inner peripheral seal part against the inner peripheral part of the through-hole part, and a through-hole part that is formed in a shape that protrudes from the outer peripheral part of the seal pressing part to the outer peripheral side A first presser that can be directly or indirectly locked with respect to the opening edge of the through hole, and directly or indirectly from the other side of the through hole with respect to the opening edge of the through hole. And a second presser part that can be stopped. For this reason, even if the attachment aspect with respect to the through-hole part of a grommet produces the error in an attachment direction, water stop performance is not influenced and it can ensure water stop performance more stably.

  According to the grommet which concerns on a 2nd aspect, since an inner peripheral seal part has the inner peripheral convex part which protrudes in the outer peripheral side and extends along the circumferential direction, the adhesiveness with respect to the inner peripheral part of a through-hole part is shown. The water stop performance can be improved.

  According to the grommet according to the third aspect, the seal member further includes an annular outer peripheral seal portion that can be in close contact with the outer peripheral portion of the cylindrical standing wall portion of the through-hole portion from the outer peripheral side. Water performance can be improved.

  According to the grommet according to the fourth aspect, the seal member has a regulated portion that is provided on the distal end side of the cylindrical portion and is disposed to face the opening edge portion of the through hole portion from one side in the penetration direction. The first pressing portion can be indirectly locked with respect to the opening edge portion of the through hole portion from one side in the penetrating direction via the restricted portion. For this reason, positioning of the sealing member in the penetration direction with respect to the through hole portion can be performed more reliably.

  According to the grommet according to the fifth aspect, the fixing member is configured by combining the first fixing portion and the second fixing portion, and the first fixing portion is disposed on the inner peripheral side of the seal member, and the seal pressing A first engaging portion provided in the seal pressing portion, and the second fixing portion is formed in an annular main body portion and a shape projecting outward from the main body portion. A second presser portion, and a second engagement portion that is provided on the main body portion and can be engaged with the first engagement portion in a manner that the seal pressing portion and the main body portion are close to each other by being close to each other in the central axis direction. Have. And a grommet is attached to a through-hole part by putting a 2nd fixing | fixed part on both sides of a through-hole part with respect to the 1st fixing | fixed part attached inside the sealing member. For this reason, by attaching the attachment member to the second fixing portion, the attachment member is attached to the through-hole by an operation of attaching the grommet to the through-hole portion on the side opposite to the seal member in the penetration direction of the through-hole portion. It can be fixed in the vicinity of the part.

  According to the grommet according to the sixth aspect, the second fixing portion is fixed to the second pressing portion, and has an annular soundproofing portion that can contact the opening edge portion of the through hole portion from the other side in the penetration direction. Abnormal noise at the contact portion between the second fixed portion and the opening edge portion of the through-hole portion can be suppressed.

  According to the grommet according to the seventh aspect, the seal member is formed in a shape protruding from the inner peripheral seal portion to the outer peripheral side, and can be brought into contact with the opening edge portion of the through hole portion from the other side in the penetration direction. It further has a contact portion, the inner peripheral seal portion is provided on the outer peripheral side of the tube portion, and the fixing member has a shape protruding from the outer peripheral portion of the seal pressing portion, the first pressing portion, and the seal pressing portion to the outer peripheral side. A second presser portion that is formed and can be locked from the other side in the penetrating direction with respect to the opening edge portion of the through hole portion via the locking contact portion. Further, the seal pressing portion and the second pressing portion are inserted between the tube portion and the inner peripheral seal portion. For this reason, by attaching the sealing member to the through-hole portion and attaching the fixing member to the sealing member in such a manner that the seal pressing portion and the second pressing portion are inserted between the cylindrical portion and the inner peripheral sealing portion. The grommet can be attached to the through-hole portion by work from either one of the through-hole portions, and the grommet attaching workability can be improved.

It is a front view of the through-hole part which showed the position of the grommet. It is the II-II sectional view taken on the line of FIG. It is a sectional side view of a sealing member. It is a front view of a fixing member. It is a figure which shows the decomposition | disassembly state of the fixing member in the VV sectional view of FIG. It is a figure which shows the attachment operation | movement of the grommet with respect to a through-hole part. It is a figure which shows the attachment operation | movement of the grommet with respect to a through-hole part. It is a fragmentary sectional side view of the grommet concerning a 2nd embodiment. It is a sectional side view of a sealing member. It is a sectional side view of a fixing member. It is a figure which shows the attachment operation | movement of the grommet with respect to a through-hole part. It is a figure which shows the attachment operation | movement of the grommet with respect to a through-hole part.

  Hereinafter, the grommet according to the embodiment will be described. This grommet is intended to stop water in the through-hole portion for inserting the wire harness.

<Through hole>
First, for convenience of description, the target through-hole portion 12 will be described (see FIGS. 1 and 2). The target through-hole portion 12 is formed in a panel 10 such as a metal panel in a vehicle body of an automobile, and has a cylindrical inner periphery (having a width in the penetration direction). Here, the through-hole portion 12 has a burring portion 14 as a cylindrical standing wall portion formed by forming a through-hole in the panel 10 and then raising an opening edge of the through-hole by burring. It is. More specifically, the burring portion 14 is formed in a cylindrical shape that protrudes to one side of the panel 10 along a direction substantially orthogonal to the panel 10. But the through-hole part 12 may be comprised by welding a cylindrical body to the opening edge part of a through-hole. In the following description, a portion on one side in the penetration direction of the opening edge portion of the through hole portion 12 is referred to as a tip portion of the burring portion 14, and a portion on the other side in the penetration direction is burring at the opening edge portion of the through hole portion 12. The part opposite to the part 14 is referred to. Here, it is assumed that the through-hole portion 12 is formed in a substantially circular shape. That is, the burring part 14 is formed in a substantially cylindrical shape.

  The wire harness 1 is routed through the through hole 12. And in order to stop water at the front end side and the base end side of the burring portion 14 in the panel 10, the gap between the wire harness 1 and the through hole portion 12 is closed by the grommet 20 inside the through hole portion 12.

  But the through-hole part 12 used as the attachment object of the grommet 20 is not restricted to said shape, What is necessary is just to have a cylindrical inner peripheral part which has a width | variety in a penetration direction. For example, the through-hole part formed in the panel with a comparatively large thickness dimension may be sufficient.

<First Embodiment>
Hereinafter, the grommet 20 which concerns on 1st Embodiment is demonstrated (refer FIGS. 2-5). The grommet 20 includes a seal member 30 and a fixing member 50 attached to the seal member 30. That is, the grommet 20 closes the gap between the wire harness 1 and the through-hole portion 12 inside the through-hole portion 12 by the seal member 30 and attaches the seal member 30 to the through-hole portion 12 by the fixing member 50. It is a member that aims to stop water in the through-hole portion 12 by being fixed in a state.

  The seal member 30 is formed in a substantially cylindrical shape as a whole, and has a cylindrical portion 32, a regulated portion 38, and an inner peripheral seal portion 42 and an outer peripheral seal portion 44 on the distal end side from the proximal end portion toward the distal end portion. (See FIG. 3). The seal member 30 is formed of a material that is relatively easily elastically deformed (easily in close contact with an object) such as EPDM (ethylene propylene diene rubber) or an elastomer. The seal member 30 is formed in a substantially cylindrical shape as a whole.

  The cylinder part 32 is formed so that the wire harness 1 can be inserted and can be in close contact with the outer peripheral part of the wire harness 1 in the insertion direction. The cylindrical portion 32 is formed in a substantially cylindrical shape, and has a small diameter portion 33 and a large diameter portion 34.

  The small-diameter portion 33 is a portion located at the proximal end portion of the seal member 30 and is a portion that is in close contact with the outer peripheral portion of the wire harness 1 inserted through the inside thereof. The small diameter portion 33 is set to an inner diameter that is the same as or smaller than the outer diameter of the wire harness 1. And in the state which expanded the small diameter part 33 and let the wire harness 1 pass, and the small diameter part 33 was closely_contact | adhered to the outer peripheral part of the wire harness 1, water tightness was given to the outer peripheral part of the small diameter part 33 and the wire harness 1 extended from there. It is preferable to secure the water stop between the wire harness 1 and the small-diameter portion 33 by winding a tape (not shown) or the like. Moreover, a water stop process may be given by the water stop agent or a water stop sheet | seat between the outer peripheral part of the wire bundle in the wire harness 1, and the small diameter part 33. FIG. Also in this case, the small-diameter portion 33 is said to be in close contact with the wire harness 1 in which a water-stopping agent is applied to the wire bundle or a water-stop sheet is attached.

  The large-diameter portion 34 is a portion that is formed to have a larger diameter than the small-diameter portion 33 and connects the small-diameter portion 33 and the regulated portion 38 on the distal end side. Here, the large diameter portion 34 has a shape that gradually increases in diameter from the small diameter portion 33 side (base end side) toward the regulated portion 38 side (tip end side) and then extends along the insertion direction. Is formed. Moreover, the large diameter part 34 has the part expanded diameter further in the front end side part. The large diameter portion 34 may include a bellows-shaped portion in a part in the insertion direction.

  The regulated portion 38 is an annular portion that is disposed to face the tip portion of the burring portion 14 when the grommet 20 is attached to the through hole portion 12. Here, the regulated portion 38 is formed so as to protrude from the distal end portion of the large diameter portion 34 to the inner peripheral side, and has an annular surface facing the distal end portion of the burring portion 14 on the distal end side of the seal member 30. ing. In addition, the regulated portion 38 comes into contact with the tip end portion of the burring portion 14 in an attached state of the grommet 20 with respect to the through-hole portion 12 and supplementarily performs a water stop function. Further, the regulated portion 38 is a portion that is sandwiched between a first pressing portion 56 (described later) of the fixing member 50 and the distal end portion of the burring portion 14 and is positioned in the penetrating direction of the through-hole portion 12.

  In addition, a recessed portion 36 that opens to the inner peripheral side is formed by the tip side portion of the large diameter portion 34 that is further expanded in diameter and the regulated portion 38. The recess 36 has an internal space that can accommodate a first pressing portion 56 of the fixing member 50 described later. However, the concave portion 36 may be omitted, and in this case, the large-diameter portion 34 has a shape that extends in a straight line along the insertion direction by omitting a further enlarged diameter portion.

  The inner peripheral seal portion 42 is formed in an annular shape (here, a cylindrical shape) that can be in close contact with the inner peripheral portion of the burring portion 14 from the inner peripheral side, and is a portion that mainly stops water. The outer peripheral seal portion 44 is an annular (here, cylindrical) portion that can be in close contact with the outer peripheral portion of the burring portion 14 from the outer peripheral side. The inner peripheral seal portion 42 and the outer peripheral seal portion 44 are each erected from the regulated portion 38 toward the distal end side of the seal member 30 with a space therebetween. More specifically, the inner peripheral seal portion 42 is erected at the distal end portion (inner peripheral side end portion) of the regulated portion 38, and the outer peripheral seal portion 44 is the base end portion (outer peripheral side end) of the regulated portion 38. Part). The regulated portion 38, the inner peripheral seal portion 42, and the outer peripheral seal portion 44 form an annular groove portion that opens to the distal end side of the seal member 30. When the grommet 20 is attached to the through-hole portion 12, the burring portion 14 is disposed in a groove formed by the regulated portion 38, the inner peripheral seal portion 42, and the outer peripheral seal portion 44 (see FIG. 2). ).

  In addition, the inner peripheral seal portion 42 has an inner peripheral convex portion 43 that protrudes toward the outer peripheral side and extends along the circumferential direction in a part of the standing direction (insertion direction of the seal member 30). The inner circumferential convex portion 43 is set such that the diameter of the tip portion is larger (slightly larger here) than the inner circumferential portion of the burring portion 14. On the other hand, the outer peripheral seal portion 44 has an outer peripheral convex portion 45 that protrudes toward the inner peripheral side and extends along the circumferential direction in a part of the standing direction. The outer peripheral convex portion 45 is set such that the diameter of the tip end portion is smaller (slightly smaller here) than the outer peripheral portion of the burring portion 14. That is, the distance between the tip portions of the inner peripheral convex portion 43 and the outer peripheral convex portion 45 is set smaller than the thickness dimension of the burring portion 14. Further, here, the inner peripheral convex portion 43 and the outer peripheral convex portion 45 are provided in the intermediate portion in the standing direction of the inner peripheral seal portion 42 and the outer peripheral seal portion 44. And the inner peripheral convex part 43 and the outer peripheral convex part 45 fulfill | perform a water stop function, when each front-end | tip part closely_contact | adheres to the inner peripheral part or outer peripheral part of the burring part 14. FIG.

  However, in the inner peripheral seal portion and the outer peripheral seal portion, the inner peripheral convex portion 43 and the outer peripheral convex portion 45 may be omitted. In this case, the outer peripheral surface of the inner peripheral seal portion and the inner peripheral surface of the outer peripheral seal portion are the same as those of the burring portion 14. What is necessary is just to be comprised so that it may closely_contact | adhere to an inner peripheral part or an outer peripheral part. Further, here, the inner peripheral seal portion 42 mainly performs water stop, and the outer peripheral seal portion 44 is an auxiliary water stop portion for improving the water stop performance. For this reason, the outer periphery seal | sticker part 44 may be abbreviate | omitted.

  The fixing member 50 is a member that improves the degree of adhesion of the inner circumferential seal portion 42 of the seal member 30 to the burring portion 14 and fixes the position of the seal member 30 in the insertion direction with respect to the through-hole portion 12 (FIG. 4). FIG. 5). The fixing member 50 is a resin molded product that is molded from a resin material such as PP (polypropylene) or PU (polyurethane) resin and has a relatively high rigidity (at least is less elastically deformed than the seal member 30). The fixing member 50 includes a seal pressing portion 54, a first pressing portion 56, and a second pressing portion 66. The seal pressing portion 54 is a portion that presses the inner peripheral seal portion 42 against the inner peripheral portion of the burring portion 14. Further, the first presser portion 56 is a portion that is indirectly locked to the distal end portion of the burring portion 14 via the restricted portion 38. The second pressing portion 66 is a portion that is directly or indirectly locked to the opening edge portion of the through-hole portion 12 from the proximal end side of the burring portion 14.

  Here, the fixing member 50 is configured by combining two members of the first fixing portion 52 and the second fixing portion 62. Schematically, the first fixing portion 52 is a member that is attached in advance to the seal member 30, and the first fixing portion 52 and the second fixing portion 62 that are attached to the sealing member 30 are sandwiched between the through-hole portions 12. By combining, the sealing member 30 is fixed to the through-hole portion 12 by the fixing member 50, and a state in which the grommet 20 is attached to the through-hole portion 12 can be obtained.

  The first fixing portion 52 is formed in an annular shape as a whole, and includes the seal pressing portion 54, the first pressing portion 56, and a first engaging portion 58. This 1st fixing | fixed part 52 is a member arrange | positioned by the inner peripheral side of the sealing member 30, and the wire harness 1 is passed through the inner side.

  The seal pressing portion 54 is a cylindrical portion disposed on the inner peripheral side of the inner peripheral seal portion 42 (see FIG. 2). The seal pressing portion 54 is formed so as to be able to press the inner peripheral seal portion 42 against the inner peripheral portion of the burring portion 14 in a state of being disposed on the inner peripheral side of the inner peripheral seal portion 42. More specifically, the seal pressing portion 54 has a thickness dimension of the inner peripheral seal portion 42 over the entire circumference of the inner peripheral portion of the burring portion 14 (here, the protrusion at the position of the inner peripheral convex portion 43). It is set to an external shape that can be contained with a smaller interval. In other words, the outer peripheral portion of the seal pressing portion 54 is set to a radius smaller than the inner peripheral portion of the burring portion 14 by a size smaller than the thickness of the inner peripheral seal portion 42. The inner circumferential convex portion 43 is disposed in the burring portion 14 in a state where the inner circumferential sealing portion 42 is disposed on the inner circumferential side of the burring portion 14 and the seal pressing portion 54 is disposed on the inner circumferential side of the inner circumferential sealing portion 42. The seal pressing portion 54 restricts the movement of the inner peripheral seal portion 42 that is in contact with the inner peripheral portion of the inner peripheral portion and moves toward the inner peripheral side. Thereby, the inner peripheral seal portion 42 (here, mainly the inner peripheral convex portion 43) is compressed and elastically deformed in the thickness direction, and is pressed against and closely adhered to the inner peripheral portion of the burring portion 14.

  The first pressing portion 56 is a portion formed in a shape protruding from the outer peripheral portion of the seal pressing portion 54 to the outer peripheral side. More specifically, the first pressing portion 56 is provided at the proximal end portion of the seal pressing portion 54 and is formed in an annular collar shape. The first pressing portion 56 is set to a size that is larger than the inner diameter of the burring portion 14 and projects to the outer peripheral side. That is, the outer diameter of the first presser portion 56 in the shape of an annular collar is set larger than the inner diameter of the burring portion 14 (here, substantially the same as the outer diameter of the burring portion 14).

  The first pressing portion 56 is a portion disposed in the recess 36 of the seal member 30 (see FIG. 2). That is, the first presser portion 56 is disposed adjacent to the base end side with respect to the regulated portion 38 in the insertion direction of the seal member 30, and the grommet 20 is attached to the through hole portion 12 in a state where the first presser portion 56 is attached. It faces the tip of the burring portion 14 with the restricting portion 38 in between. As a result, the first pressing portion 56 can be locked to the distal end portion of the burring portion 14 via the restricted portion 38. Further, the first presser portion 56 restricts the position of the restricted portion 38 in the penetrating direction of the through-hole portion 12 while being locked to the distal end portion of the burring portion 14 via the restricted portion 38.

  The first engaging portion 58 is a portion that is provided in the seal pressing portion 54 and engages with a second engaging portion 68 of the second fixing portion 62 described later. The shape and manner of engagement of the first engagement portion 58 will be described later together with the description of the second engagement portion 68.

  The second fixing portion 62 is formed in an annular shape as a whole, and has a main body portion 64, the second pressing portion 66, a second engaging portion 68, and a soundproof portion 72.

  The main body portion 64 is a portion that extends in an annular shape and joins the second pressing portion 66 and the second engaging portion 68, and is formed in a cylindrical shape here.

  The second pressing portion 66 is a portion formed in a shape protruding from the outer peripheral portion of the main body portion 64 to the outer peripheral side. More specifically, the second pressing portion 66 is provided at the base end portion of the main body portion 64 and is formed in an annular collar shape. The second pressing portion 66 is set to a size that protrudes larger than the inner diameter of the burring portion 14 to the outer peripheral side (see FIG. 2). In other words, the outer diameter of the annular collar-shaped second pressing portion 66 is set to be larger than the inner diameter of the burring portion 14 (here, larger than the outer diameter of the burring portion 14). And the 2nd presser part 66 can be directly latched from the base end side of the burring part 14 with respect to the opening edge part of the through-hole part 12 in the state in which the main-body part 64 was inserted in the through-hole part 12. It has become.

  In general, the base end portion of the burring portion 14 is curved by burring (see FIG. 2). As a part which the 2nd presser part 66 latches to the opening edge part of the through-hole part 12, the plane part orthogonal to the penetration direction of the through-hole part 12 is preferable. For this reason, it is preferable that the second pressing portion 66 is set to a size that is large enough to contact the flat surface portion.

  The second pressing portion 66 is provided with an annular soundproof portion 72 that can contact the opening edge portion of the through-hole portion 12 from the base end side of the burring portion 14. The soundproof portion 72 is a portion for suppressing abnormal noise generated by the vibration of the automobile in the contact state between the second presser portion 66 and the panel 10. Here, the soundproof portion 72 is affixed to the base end surface of the second pressing portion 66 with a double-sided adhesive tape or the like, and the burring portion 14 with respect to the opening edge portion of the through hole portion 12 on the outer peripheral side of the second pressing portion 66. It is provided so that it may contact from the base end side. That is, the soundproof portion 72 is formed in an annular shape corresponding to the shape of the second presser portion 66, and has a substantially L shape in the circumferential direction. A portion of the soundproof portion 72 located on the outer peripheral side of the second presser portion 66 has a contact surface that is flush with the tip side surface of the second presser portion 66 or protrudes toward the tip side.

  As the soundproof part 72, rubber materials, non-woven fabrics, or other various materials used for soundproofing can be adopted.

  But the soundproof part 72 may be affixed on the front end side surface of the 2nd presser part 66. FIG. In this case, the second pressing portion 66 is configured to be indirectly locked to the opening edge portion of the through hole portion 12 via the soundproof portion 72. Further, the soundproof portion 72 may be fixed to the second presser portion 66 by an adhesive or screwing. Furthermore, the soundproof unit 72 may be omitted.

  The second engaging portion 68 is a portion that is provided in the main body portion 64 and engages with the first engaging portion 58 of the first fixing portion 52. The first engaging portion 58 and the second engaging portion 68 are arranged so that the first fixing portion 52 and the second fixing portion 62 are oriented in the central axis direction (in other words, the seal pressing portion 54 and the second pressing portion 62). By being close to the main body 64 in the direction of the central axis), the main body 64 can be engaged so as not to be separated. Schematically, the second engaging portion 68 is formed in an arm shape extending partially from the distal end portion of the main body portion 64 in the circumferential direction, and has a claw portion 69 at the distal end portion. On the other hand, the first engaging portion 58 is formed in a frame shape into which the second engaging portion 68 can be inserted, and has a locked surface to which the claw portion 69 can be locked.

  The second engagement portion 68 extends from a plurality of locations (here, three locations at equal intervals) at intervals in the circumferential direction at the distal end portion of the main body portion. More specifically, the 2nd engaging part 68 is formed in the shape where the nail | claw part 69 protrudes to the inner peripheral side from the inner peripheral part of the front-end | tip part formed in the arm shape. The nail | claw part 69 is formed in the shape from which a protrusion dimension becomes large gradually toward a base end side from a front-end | tip part. The base end surface of the claw portion 69 is a locking surface that comes into contact with the locked surface of the first engaging portion 58.

  A plurality (three in this case) of the first engaging portions 58 are provided on the inner peripheral portion of the seal pressing portion 54 so as to correspond to the second engaging portions 68 at intervals in the circumferential direction. More specifically, the first engaging portion 58 is formed in a shape in which both side end portions of the wall portion 59 provided at intervals on the inner peripheral portion of the seal pressing portion 54 are supported by the side wall portion. And the base end surface of the wall part 59 is a to-be-latched surface. This wall portion 59 is larger than the inner peripheral portion of the seal pressing portion 54 in the thickness dimension of the proximal end side portion (arm-like portion) of the second engagement portion 68 (here, the thickness at the claw portion 69 is further increased). Supported at a distance (same or slightly smaller than the size). Further, the wall 59 is positioned so that the surface on the seal pressing portion 54 side is located on the circumference having the same or smaller diameter (slightly smaller here) as the inner circumferential portion of the main body portion 64 of the second fixing portion 62. Is set.

  Then, when the first fixing portion 52 and the second fixing portion 62 are brought close to each other in the central axis direction, the second engaging portion 68 is inserted inside the first engaging portion 58. At this time, the second engaging portion 68 is inserted while the claw portion 69 abuts against the wall portion 59 of the first engaging portion 58 and elastically deforms to the outer peripheral side. Further, the wall portion 59 is also elastically deformed to the inner peripheral side so as to be pushed by the claw portion 69 and separated from the seal pressing portion 54. When the claw portion 69 gets over the wall portion 59, the second engagement portion 68 returns to the original shape, and the claw portion 69 is positioned on the proximal end side of the wall portion 59 (see FIG. 2). That is, the locking surface of the claw portion 69 faces the locked surface of the wall portion 59, and the claw portion 69 is locked to the wall portion 59. Thereby, the 1st engaging part 58 and the 2nd engaging part 68 engage so that separation is impossible, and the 1st fixing part 52 and the 2nd fixing part 62 are maintained in the union state.

  In the engaged state between the first engaging portion 58 and the second engaging portion 68, the interval between the first pressing portion 56 and the second pressing portion 66 is overlapped by the burring portion 14 and the regulated portion 38 interposed therebetween. The dimension is set to be the same as or slightly smaller than the dimension of the through-hole portion 12 in the center axis direction.

  Next, an operation for attaching the grommet 20 to the through hole portion 12 will be described.

  First, the 1st fixing | fixed part 52 is attached with respect to the sealing member 30 (refer FIG. 6). That is, the front end side portion of the seal member 30 is expanded, and the first fixing portion 52 is fitted inside the seal member 30 (here, entirely). More specifically, the first pressing portion 56 is disposed in the recess 36, and the seal pressing portion 54 (and the first engaging portion 58) is disposed on the inner peripheral side of the inner peripheral seal portion 42.

  Next, the seal member 30 to which the first fixing portion 52 is attached is attached to the through-hole portion 12. More specifically, the seal member 30 is disposed with respect to the through-hole portion 12 so that the burring portion 14 is disposed in a groove formed by the regulated portion 38, the inner peripheral seal portion 42, and the outer peripheral seal portion 44. And pressing from the front end side of the burring portion 14. At this time, the inner peripheral convex portion 43 of the inner peripheral seal portion 42 and the outer peripheral convex portion 45 of the outer peripheral seal portion 44 are pressed against the inner peripheral portion or the outer peripheral portion of the burring portion 14 to be elastically deformed and are in close contact with each other. Furthermore, the inner peripheral seal portion 42 is pressed against the inner peripheral portion of the burring portion 14 by the seal pressing portion 54 located on the inner peripheral side thereof, and is further greatly compressed and elastically deformed. Further, the first pressing portion 56 is disposed at a position facing the tip end portion of the burring portion 14 with the regulated portion 38 interposed therebetween.

  Furthermore, the 2nd fixing | fixed part 62 is combined with the 1st fixing | fixed part 52 (refer FIG. 7). That is, the second fixing portion 62 is pressed against the first fixing portion 52 so that the second engaging portion 68 is engaged with the first engaging portion 68. At this time, the second engagement portion 68 is inserted and engaged with the first engagement portion 58. Further, the second pressing portion 66 and the soundproof portion 72 are pressed against the opening edge portion of the through-hole portion 12 from the base end side of the burring portion 14 (see FIG. 2). In a state where the first engagement portion 58 and the second engagement portion 68 are engaged, the first fixing portion 52 and the second fixing portion 62 are in an inseparable state. The first pressing portion 56 is pressed against the regulated portion 38 toward the distal end portion of the burring portion 14 and indirectly locked to the distal end portion of the burring portion 14 via the regulated portion 38. Become. Further, the second pressing portion 66 is pressed and locked from the base end side of the burring portion 14 to the opening edge portion of the through hole portion 12.

  As described above, the grommet 20 is attached to the through-hole portion 12. Note that the wire harness 1 may be inserted after the grommet 20 is attached to the through-hole portion 12, or before the combination of the seal member 30 to which the first fixing portion 52 is attached and the second fixing portion 62. The member and the through-hole portion 12 may be inserted in advance.

  So far, the example in which the grommet 220 is formed in an annular shape as a whole corresponding to the circular through hole portion 12 has been described, but in the case where the through hole portion 12 is formed in an elliptical shape or a polygonal shape. It may be formed in an elliptical ring shape or a polygonal ring shape corresponding to the shape.

  Moreover, although the 1st press part 56 and the 2nd press part 66 demonstrated in the example formed in the shape of a ring collar, it is not restricted to this. For example, the first pressing portion 56 and the second pressing portion 66 may be formed in a shape that protrudes intermittently in the circumferential direction from the outer peripheral portion of the seal pressing portion 54 or the main body portion 64 in the circumferential direction.

  In addition, until now, the first engaging portion 58 has been formed in a frame shape on the inner peripheral side of the seal pressing portion 54, and the second engaging portion 68 has been formed in an arm shape extending from the distal end portion of the main body portion 64. However, the present invention is not limited to this shape. For example, the first engagement portion may be formed in an arm shape extending from the distal end portion of the seal pressing portion 54, and the second engagement portion may be formed in a frame shape on the inner peripheral side of the main body portion 64. . In other words, if the first engaging portion 58 and the second engaging portion 68 are configured to be able to engage with each other by being close to each other in the central axis direction of the first fixing portion 52 and the second fixing portion 62, Various other shapes can be employed.

  In addition to the soundproof portion 72, a member disposed in the proximal end side space of the burring portion 14 with respect to the through hole portion 12 may be fixed to the second pressing portion 66. That is, by fixing to the second pressing portion 66 in advance, the target member can be disposed in the space while being fixed to the panel 10, and the labor for fixing to the panel 10 or a peripheral member in the vicinity thereof can be saved. Can do. Examples of other target members of the soundproof unit 72 include connectors, junction boxes, and relay boxes.

  According to the grommet which concerns on 1st Embodiment, it is provided with the sealing member 30 and the fixing member 50 attached to the sealing member 30, and the sealing member 30 can insert the wire harness 1, and is an outer periphery of the wire harness 1 partially in an insertion direction. A cylindrical portion 32 that can be in close contact with the cylindrical portion, a cylindrical inner peripheral seal portion 42 that is provided on the distal end side of the cylindrical portion 32 and can be in close contact with the inner peripheral portion of the burring portion 14 from the inner peripheral side, and the burring portion 14 The fixed member 50 is disposed on the inner peripheral side of the inner peripheral seal portion 42 so as to connect the inner peripheral seal portion 42 to the burring portion 14. A cylindrical seal pressing portion 54 that can be pressed to the inner peripheral portion, and a shape that protrudes from the outer peripheral portion of the seal pressing portion 54 to the outer peripheral side, and indirectly to the distal end portion of the burring portion 14 via the regulated portion 38 Locked in A first pressing portion 56 Noh, and a second pressing portion 66 to be locked from the base end side of the bearing portion 14 to the opening edge of the through hole 12. For this reason, even if the attachment aspect with respect to the through-hole part 12 of the grommet 20 produces the error in an attachment direction, a water stop performance is not influenced and it can ensure a water stop performance more stably.

  Further, according to the configuration in which the seal member 42 further includes the annular outer peripheral seal portion 44 that can be in close contact with the outer peripheral portion of the burring portion 14 from the outer peripheral side, both the inner peripheral portion and the outer peripheral portion of the burring portion 14 are provided. The water can be stopped by the water, and the water stop performance can be further improved.

  Moreover, according to the structure which the inner peripheral seal part 42 and the outer peripheral seal part 44 have the inner peripheral convex part 43 or the outer peripheral convex part 45 which protrude in the outer peripheral side or the inner peripheral side, respectively, and extend along the circumferential direction, respectively. Moreover, the water stop performance can be improved by improving the degree of adhesion of the burring part 14 to the inner peripheral part or the outer peripheral part.

  The fixing member 50 is configured by combining a first fixing portion 52 and a second fixing portion 62, and the first fixing portion 52 is disposed on the inner peripheral side of the seal member 42, and the seal pressing portion 54 The first pressing portion 56 and the first engaging portion 58 provided in the seal pressing portion 54, and the second fixing portion 62 protrudes from the main body portion 64 and the main body portion 64 to the outer peripheral side. The second pressing portion 66 formed in the shape and the main body portion 64 are provided so as to be inseparable from each other by being close to the first engaging portion 58 in the central axis direction of the seal pressing portion 54 and the main body portion 64. And a possible second engaging portion 68. And the grommet 20 is attached to the through-hole part 12 by combining the 2nd fixing | fixed part 62 on both sides of the through-hole part 12 with respect to the 1st fixing | fixed part 52 arrange | positioned by the inner peripheral side of the sealing member 30. . For this reason, by attaching the attachment member to the second fixing portion 62, the attachment member is attached by the operation of attaching the grommet 20 to the through-hole portion 12 on the side opposite to the seal member 30 of the through-hole portion 12. It can be fixed in the vicinity of the through-hole portion 12.

  Further, according to the configuration, the second fixing portion 62 includes the annular soundproof portion 72 that is fixed to the second pressing portion 66 and that can contact the opening edge portion of the through-hole portion 12 from the base end side of the burring portion 14. Further, it is possible to suppress abnormal noise at the contact portion between the seal member 30 and the second fixing portion 62 and the opening edge portion of the through-hole portion 12.

Second Embodiment
Next, the grommet 220 which concerns on 2nd Embodiment is demonstrated (refer FIGS. 8-10). In addition, about the content common to the content demonstrated about the grommet 20 which concerns on 1st Embodiment among the grommet 220, description is abbreviate | omitted. The grommet 220 includes a seal member 230 and a fixing member 250.

  The seal member 230 is formed in a substantially cylindrical shape as a whole, and includes a cylindrical portion 232, a connecting portion 236 having a locking contact portion 237, an inner peripheral seal portion 242, an outer peripheral seal portion 244, and a regulated portion 246. (See FIG. 9).

  The cylindrical part 232 is formed so that the wire harness 1 can be inserted and can be in close contact with the outer peripheral part of the wire harness 1 in the insertion direction. The cylindrical portion 232 is a portion extending from the proximal end portion of the seal member 230 to the distal end portion. Here, the cylinder part 232 is formed in a substantially cylindrical shape, and has a small diameter part 233 and a large diameter part 234.

  The small-diameter portion 233 is a portion that is in close contact with the outer peripheral portion of the inserted wire harness 1 and is the same component as the small-diameter portion 33 of the cylindrical portion 32 in the seal member 30 according to the first embodiment.

  The large diameter portion 234 is a portion that extends from the distal end portion of the small diameter portion 233 to the distal end portion of the grommet 220 and is formed to have a larger diameter than the small diameter portion 233. Here, the large-diameter portion 234 is formed in a shape that gradually increases from the small-diameter portion 233 toward the distal end and then extends along the insertion direction.

  Further, a cylindrical inner peripheral seal portion 242 is provided on the outer peripheral side of the large diameter portion 234 of the cylindrical portion 232. The large-diameter portion 234 and the inner peripheral seal portion 242 are connected to each other at the end portions on the distal end side of the seal member 230 with a connection portion 236 therebetween. An annular recess 238 that opens toward the proximal end side of the seal member 230 is formed inside the large diameter portion 234, the inner peripheral seal portion 242, and the connection portion 236. The recess 238 has an internal space that can accommodate a seal pressing portion 254 and a second pressing portion 256 of the fixing member 250 described later. More specifically, the internal space of the recess 238 is set to have the same size as or slightly larger than the outer shape of the seal pressing portion 254 and the second pressing portion 256 of the fixing member 250.

  A cylindrical outer peripheral seal portion 244 is provided on the outer peripheral side of the inner peripheral seal portion 242. The inner peripheral seal portion 242 and the outer peripheral seal portion 244 are connected to each other at the base end side of the seal member 230 with a restricted portion 246 therebetween. An annular groove that opens toward the distal end side of the seal member 230 is formed inside the inner peripheral seal portion 242, the outer peripheral seal portion 244, and the restricted portion 246. When the grommet 220 is attached to the through-hole portion 12, the burring portion 14 is disposed in a groove formed by the inner peripheral seal portion 242, the outer peripheral seal portion 244, and the restricted portion 246 (see FIG. 8). ).

  The inner peripheral seal portion 242 is formed so as to be in close contact with the inner peripheral portion of the burring portion 14 from the inner peripheral side, and is a portion that mainly stops water. The inner peripheral seal portion 242 has an inner peripheral convex portion 243 that protrudes on the outer peripheral side and extends along the circumferential direction in a part of the seal member 230 in the insertion direction. The inner peripheral convex portion 243 is set such that the diameter of the tip end portion (outer peripheral side end portion) is larger (slightly larger here) than the inner peripheral portion of the burring portion 14. Here, the inner peripheral convex portion 243 is provided at an intermediate portion in the standing direction of the inner peripheral seal portion 242.

  Further, the outer peripheral seal portion 244 is a portion formed so as to be in close contact with the outer peripheral portion of the burring portion 14 from the outer peripheral side. The outer peripheral seal portion 244 is provided with a space smaller than the thickness of the burring portion 14 with respect to the tip end portion of the inner peripheral convex portion 243 of the inner peripheral seal portion 242.

  The inner peripheral seal portion 242 fulfills a water stop function by mainly contacting the inner peripheral convex portion 43 and the outer peripheral seal portion 244 closely contacting the inner peripheral portion or the outer peripheral portion of the burring portion 14.

  However, even if the inner peripheral convex portion 243 is omitted in the inner peripheral seal portion 242, an outer peripheral convex portion that protrudes toward the inner peripheral side in the outer peripheral seal portion may be formed. Further, here, the inner peripheral seal portion 242 mainly performs water stop, and the outer peripheral seal portion 244 is an auxiliary water stop portion for improving the water stop performance. For this reason, the outer periphery seal | sticker part 244 may be abbreviate | omitted.

  The regulated portion 246 is an annular portion that is disposed to face the tip of the burring portion 14 when the grommet 220 is attached to the through-hole portion 12 (see FIG. 8). The regulated portion 246 has an annular surface facing the tip portion of the burring portion 14 on the tip side of the seal member 230. In addition, the regulated portion 246 comes into contact with the tip end portion of the burring portion 14 in an attached state of the grommet 220 with respect to the through-hole portion 12 and supplementarily functions as a water stop.

  The connecting portion 236 is a portion that connects the large diameter portion 234 of the cylindrical portion 232 and the inner peripheral seal portion 242, and is provided on the outer peripheral side of the large diameter portion 234 and on the distal end side of the inner peripheral seal portion 242. The connection portion 236 has an internal space (a back side portion in the internal space of the recessed portion 238) in which a second pressing portion 256 of the fixing member 250 described later can be disposed inside the distal end portion of the large diameter portion 234. The back side portion of the recess 238 is set wider than the opening side portion (the dimension of the seal member 230 in the inner and outer directions is larger). The connection portion 236 has a locking contact portion 237.

  The locking contact portion 237 is a portion formed so as to be able to come into contact with the opening edge portion of the through-hole portion 12 from the base end side of the burring portion 14 when the grommet 220 is attached to the through-hole portion 12 (FIG. 8). The locking contact portion 237 has a contact surface along the opening edge, and is arranged in a form along the opening edge from the inner peripheral portion of the through-hole portion 12. More specifically, the locking contact portion 237 is formed in a shape that protrudes to the outer peripheral side from the inner peripheral seal portion 242. In other words, the locking contact portion 237 is set to have an outer diameter larger than the diameter of the inner peripheral portion of the burring portion 14. In terms of the locking performance, the locking contact portion 237 may be set to a size that is large enough to be in contact with a plane portion orthogonal to the through direction of the through-hole portion 12. Then, when the sealing member 230 is attached to the through-hole portion 12, the locking contact portion 237 has an outer peripheral portion facing the opening edge portion of the through-hole portion 12 from the base end side of the burring portion 14.

  The fixing member 250 is attached to the seal member 230, improves the degree of adhesion of the inner peripheral seal portion 242 of the seal member 230 to the burring portion 14, and fixes the position of the seal member 230 in the insertion direction with respect to the through hole portion 12. (See FIG. 10). The fixing member 250 is formed in an annular shape as a whole. The fixing member 250 includes a seal pressing portion 254, a first pressing portion 256, and a second pressing portion 258.

  The seal pressing portion 254 is a portion that presses the inner peripheral seal portion 242 against the inner peripheral portion of the burring portion 14 (see FIG. 8). The seal pressing portion 254 is a portion formed in a cylindrical shape (here, a cylindrical shape) disposed on the inner peripheral side of the inner peripheral seal portion 42. More specifically, the seal pressing portion 254 has a thickness dimension of the inner peripheral seal portion 242 over the entire circumference with respect to the inner peripheral portion of the burring portion 14 (here, the protrusion at the position of the inner peripheral convex portion 243). It is set to an external shape that can be contained with a smaller interval. That is, the outer peripheral portion of the seal pressing portion 254 is set to a radius that is smaller than the inner peripheral portion of the burring portion 14 by a size smaller than the thickness of the inner peripheral seal portion 242. Then, the inner peripheral seal portion 242 is disposed on the inner peripheral side of the burring portion 14, and the inner peripheral convex portion 243 is disposed on the inner peripheral side of the inner peripheral seal portion 42 while the inner peripheral convex portion 243 is disposed on the burring portion 14. The seal pressing portion 254 restricts the movement of the inner peripheral seal portion 242 that is in contact with the inner peripheral portion of the inner peripheral portion and moves toward the inner peripheral side. Thereby, the inner peripheral seal portion 242 (here, mainly the inner peripheral convex portion 243) is compressed and elastically deformed in the thickness direction, and is pressed against and closely adhered to the inner peripheral portion of the burring portion 14.

  The first presser portion 256 is a portion that is indirectly locked to the distal end portion of the burring portion 14 via the restricted portion 246. The first pressing portion 256 is formed in a shape protruding from the outer peripheral portion of the seal pressing portion 254 to the outer peripheral side. More specifically, the first pressing portion 256 is provided at the proximal end portion of the seal pressing portion 254 and is formed in an annular collar shape. Further, the first pressing portion 256 is set to a size that protrudes larger than the inner diameter of the burring portion 14 toward the outer peripheral side. That is, the outer diameter of the ring-shaped first presser portion 256 is set to be larger than the inner diameter of the burring portion 14 (here, larger than the outer diameter of the burring portion 14).

  And this 1st press part 56 is arrange | positioned adjacent to the base end side with respect to the to-be-regulated part 246 in the insertion direction of the sealing member 230, and the grommet 220 is attached to the through-hole part 12, It faces the tip of the burring portion 14 with the regulated portion 246 in between. Thereby, the first presser portion 256 can be locked to the tip end portion of the burring portion 14 via the restricted portion 246.

  The second pressing portion 258 is a portion that is indirectly locked to the opening edge portion of the through-hole portion 12 from the base end side of the burring portion 14 via the locking contact portion 237 in the connection portion 236. The second pressing portion 258 is formed in a shape that protrudes from the outer peripheral portion of the seal pressing portion 254 to the outer peripheral side. More specifically, the second pressing portion 258 is provided at the tip end portion of the seal pressing portion 254 and is formed in an annular collar shape. The outer diameter of the annular collar-shaped second pressing portion 258 is set to be larger than the diameter of the inner peripheral portion of the inner peripheral seal portion 242 (the base end portion of the inner peripheral convex portion 243). That is, here, the second presser portion 258 passes through the locking contact portion 237 set to an outer diameter larger than the diameter of the inner peripheral portion of the burring portion 14 with respect to the opening edge portion of the through hole portion 12. Therefore, it is formed in a shape that can be brought into contact with the locking contact portion 237 from the inner peripheral side and the front end side of the seal member 230.

  Further, the second presser portion 258 has a substantially isosceles trapezoidal shape in a cross-sectional view orthogonal to the circumferential direction. More specifically, when the fixing member 250 is attached to the seal member 230, the second presser portion 258 is inserted into the back side portion wider than the opening side portion through the relatively narrow opening side portion of the recess 238. In order to improve the workability, an inclined surface or a curved surface (here, a curved surface) is provided on the distal end side (the distal end side of the fixing member 250). That is, the distal end portion of the second pressing portion 258 is formed in a shape in which the dimension in the projecting direction gradually increases from the distal end side toward the proximal end side. Further, since the second pressing portion 258 restricts the position of the locking contact portion 237 to a position where it comes into contact with the opening edge portion of the through-hole portion 12 from the base end side of the burring portion 14, the burring in the through-hole portion 12 is performed. It is formed in a shape along the inner peripheral portion of the locking contact portion 237 having a shape along a curved portion extending from the inner peripheral portion of the portion 14 to the opening edge portion. Here, the base end side surface of the second pressing portion 258 is formed along the inner peripheral portion of the locking contact portion 237 and the curved portion of the through-hole portion 12. That is, the base end side (base end side in the fixing member 250) portion of the second presser portion 258 is formed in a shape in which the dimension in the protruding direction gradually increases from the base end side toward the distal end side.

  In consideration of insertion workability of the second pressing portion 258 into the concave portion 238, slits 259 along the central axis direction may be formed at a plurality of locations in the circumferential direction of the tip side portion of the seal pressing portion 254. Good (see FIG. 10). That is, the second pressing portion 258 is configured to be easily elastically deformed to the inner peripheral side when inserted into the concave portion 238.

  Next, an operation for attaching the grommet 220 to the through-hole portion 12 will be described.

  First, the seal member 230 is attached to the through-hole portion 12 (see FIG. 11). More specifically, the burring portion 14 is disposed in a groove formed by the inner peripheral seal portion 242, the outer peripheral seal portion 244 and the restricted portion 246 while the connection portion 236 is compressed toward the inner peripheral side of the through hole portion 12. As shown, the seal member 230 is pressed against the through-hole portion 12 from the front end side of the burring portion 14. With the seal member 230 attached to the through-hole portion 12, the locking contact portion 237 is in contact with the opening edge of the through-hole portion 12 from the base end side of the burring portion 14 (see FIG. 12). ). Further, the inner peripheral convex portion 243 of the inner peripheral seal portion 242 is pressed against the inner peripheral portion of the burring portion 14 to be elastically deformed and closely adhered.

  Next, the fixing member 250 is attached to the seal member 230 attached to the through-hole portion 12 (see FIG. 12). That is, the seal pressing portion 254 and the second pressing portion 258 are inserted into the recess 238. At this time, the seal pressing portion 254 is disposed in the inner space on the relatively narrow opening side in the recess 238, and the second pressing portion 258 is disposed in the inner space on the back side wider than the opening side in the recess 238. . In the state where the fixing member 250 is attached to the seal member 230, the inner peripheral seal portion 242 (mainly the inner peripheral convex portion 243) has an inner peripheral portion of the burring portion 14 by a seal pressing portion 254 disposed on the inner peripheral side. Is compressed and elastically deformed more greatly (see FIG. 8). Further, the regulated portion 246 is pressed against the tip end portion of the burring portion 14 by the first pressing portion 256, and the locking contact portion 237 is burring portion with respect to the opening edge portion of the through hole portion 12 by the second pressing portion 258. 14 is pressed from the base end side. That is, the first presser portion 256 is locked to the tip end portion of the burring portion 14 via the restricted portion 246, and the second presser portion 258 is disposed on the opening edge portion of the through-hole portion 12 with respect to the burring portion 14. It will be in the state latched via the contact part 237 for latching from the base end side.

  As described above, the grommet 220 is attached to the through-hole portion 12. The wire harness 1 may be inserted after the grommet 220 is attached to the through-hole portion 12, or may be inserted in advance with respect to each member and the through-hole portion 12 before the grommet 220 is attached.

  So far, the example in which the grommet 220 is formed in an annular shape as a whole corresponding to the circular through hole portion 12 has been described, but in the case where the through hole portion 12 is formed in an elliptical shape or a polygonal shape. It may be formed in an elliptical ring shape or a polygonal ring shape corresponding to the shape.

  In addition, the first presser portion 256 and the second presser portion 258 have been described with an example in which the first presser portion 256 and the second presser portion 258 are formed in an annular hook shape. However, the present invention is not limited to this example. It may be formed in a shape protruding intermittently to the outer peripheral side.

  Further, the example in which the regulated portion 246 is provided for the seal member 230 has been described so far, but the regulated portion 246 may be omitted (only when the outer peripheral seal portion 244 is omitted). In this case, the first presser portion 256 is configured to be directly locked with respect to the distal end portion of the burring portion 14. However, from the viewpoint of reliably positioning the seal member 230 with respect to the through-hole portion 12 in the penetration direction, it is preferable that the regulated portion 246 is provided.

  According to the grommet 220 according to the second embodiment, the inner circumferential seal portion 242 is configured to press the inner circumferential portion of the burring portion 14 by pressing the inner circumferential seal portion 242 against the inner circumferential portion of the burring portion 14. Even if an error occurs in the mounting direction due to the mounting mode, the water stop performance is not affected, and the water stop performance can be more stably ensured.

  Further, the seal member 230 is formed in a shape that protrudes from the inner peripheral seal portion 242 to the outer peripheral side of the cylindrical portion 232, the inner peripheral seal portion 242 provided on the outer peripheral side of the cylindrical portion 232, the regulated portion 246, and the like. A locking contact portion 237 that can contact the opening edge of the through-hole portion 12 from the base end side of the burring portion 14, and the fixing member 250 includes a seal pressing portion 254, a first pressing portion 256, and the like. The seal pressing portion 254 is formed in a shape protruding from the outer peripheral portion to the outer peripheral side, and can be locked from the proximal end side of the burring portion 14 to the opening edge portion of the through-hole portion 12 via the locking contact portion 237. Second presser part 258. For this reason, the grommet 220 can be attached to the through-hole portion 12 from one side, and the attachment workability of the grommet 220 can be improved.

  Further, according to the configuration in which the regulated portion 246 is provided, the positioning of the seal member 230 in the penetration direction with respect to the through hole portion 12 can be performed more reliably.

  Further, according to the configuration in which the seal member 230 further includes the annular outer peripheral seal portion 244 that can be in close contact with the outer peripheral portion of the burring portion 14 from the outer peripheral side, both the inner peripheral portion and the outer peripheral portion of the burring portion 14 are provided. The water can be stopped by the water, and the water stop performance can be further improved.

  Further, according to the configuration in which the inner peripheral seal portion 242 has an inner peripheral convex portion 43 that protrudes on the outer peripheral side and extends along the circumferential direction, the degree of adhesion to the inner peripheral portion of the burring portion 14 is improved, The water stop performance can be improved.

DESCRIPTION OF SYMBOLS 1 Wire harness 12 Through-hole part 14 Burring part 20, 220 Grommet 30, 230 Seal member 32, 232 Cylinder part 38, 246 Regulated part 42, 242 Inner circumference seal part 43, 243 Inner circumference convex part 44, 244 Outer circumference seal part 50, 250 fixing member 52 first fixing portion 54, 254 seal pressing portion 56, 256 first pressing portion 58 first engaging portion 62 second fixing portion 64 main body portion 66, 258 second pressing portion 68 second engaging portion 72 soundproofing Part 237 Locking contact part 238 Concave part

Claims (7)

A grommet for stopping water in a through-hole portion for inserting a wire harness having a cylindrical inner peripheral portion,
A cylindrical portion that can be inserted through the wire harness and partially in close contact with the outer peripheral portion of the wire harness in the insertion direction; and an inner periphery with respect to an inner peripheral portion of the through-hole portion that is provided on the distal end side of the cylindrical portion A seal member having an annular inner peripheral seal portion that can be closely contacted from the side;
A cylindrical seal pressing portion disposed on the inner peripheral side of the inner peripheral seal portion and capable of pressing the inner peripheral seal portion against the inner peripheral portion of the through-hole portion, and from the outer peripheral portion of the seal pressing portion to the outer peripheral side A first pressing portion that is formed in a protruding shape and can be directly or indirectly locked with respect to the opening edge portion of the through hole portion from one side in the penetrating direction, and the opening edge portion of the through hole portion. A second pressing part that can be directly or indirectly locked from the other side in the penetrating direction, and a fixing member attached to the seal member;
With grommet. The grommet according to claim 1,
The inner circumferential seal portion is a grommet having an inner circumferential convex portion that protrudes toward the outer circumferential side and extends along the circumferential direction. The grommet according to claim 1 or 2, wherein
The grommet, wherein the seal member further includes an annular outer peripheral seal portion that can be in close contact with the outer peripheral portion of the cylindrical standing wall portion of the through-hole portion from the outer peripheral side. The grommet according to any one of claims 1 to 3, wherein
The seal member is provided on the distal end side of the cylindrical portion, and has a regulated portion that is disposed to face the opening edge portion of the through-hole portion from one side in the penetration direction.
The first presser part is a grommet that can be indirectly locked with respect to the opening edge part of the through hole part from the one side in the penetration direction via the regulated part. The grommet according to any one of claims 1 to 4,
The fixing member is configured by combining a first fixing portion and a second fixing portion,
The first fixing portion is disposed on an inner peripheral side of the seal member, and includes the seal pressing portion, the first pressing portion, and a first engagement portion provided in the seal pressing portion,
The second fixing portion is provided in the annular main body portion, the second pressing portion formed in a shape projecting from the main body portion to the outer peripheral side, and the main body portion. A grommet comprising: the seal pressing portion and a second engagement portion that can be engaged with each other by being close to each other in the central axis direction of the main body portion. The grommet according to claim 5,
The second fixing portion is a grommet that is fixed to the second pressing portion and has an annular soundproof portion that can contact the opening edge of the through-hole portion from the other side in the penetration direction. The grommet according to any one of claims 1 to 4, wherein
The seal member further includes a locking contact portion that is formed in a shape protruding from the inner peripheral seal portion to the outer peripheral side and can be contacted from the other side in the penetrating direction with respect to the opening edge portion of the through hole portion,
The inner peripheral seal portion of the seal member is provided on the outer peripheral side of the cylindrical portion,
The fixing member is formed in a shape protruding from the outer peripheral portion of the seal pressing portion, the first pressing portion, and the seal pressing portion to the outer peripheral side, and is formed on the through hole portion via the locking contact portion. A second presser part that can be locked from the other side in the penetrating direction with respect to the opening edge part,
The seal pressing part and the second pressing part are grommets inserted between the tube part and the inner peripheral seal part.

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