JP2014003866A - Grommet and wire harness with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a more secure water stop performance.SOLUTION: A grommet 20 includes: a wire harness insertion section; an annular depression section 44 which faces one main face of a car body panel to be arranged; a positioning section 40 which can abut on an inner peripheral section of a through hole 12 from the other main face of the car body panel; and a water stop section 60 installed in the annular depression section 44. The water stop section 60 includes: a first annular water stop section 62 which gradually expands from the annular depression face 45 to the positioning section 40; a second annular water stop section 64 which gradually expands from the annular depression face 45 toward the positioning section 40 at an outer peripheral side of the first annular water stop section 62; and an annular coupling section 66 for coupling a tip side peripheral edge of the first annular water stop section 62 and a base end side peripheral edge of the second annular water stop section 64. The annular coupling section 66 is formed to go toward an inner peripheral side of the water stop section 60 from the base end side peripheral edge of the second annular water stop section 64 and goes to the tip side peripheral edge of the first annular water stop section 62.

Description

  The present invention relates to a technique for stopping water when a wire harness is passed through a through hole formed in a vehicle body panel or the like.

  The grommet disclosed in Patent Document 1 has a configuration in which a lip portion that comes into contact with the one surface of the vehicle body panel at the peripheral portion of the through hole and a lip portion that comes into contact with the inner surface of the burring are provided.

  The grommet disclosed in Patent Document 2 includes an outer peripheral portion that comes into contact with a peripheral surface of a hole with respect to one surface of a vehicle body panel, and a center lip that comes into contact with an outer corner portion of a boundary portion between the vehicle body panel and the burring. It is said that.

JP-A-9-92060 JP-A-10-188705

  However, in the techniques disclosed in Patent Documents 1 and 2, the lip portion or the center lip and the burring according to the size of the mounting hole, the rising angle of the burring with respect to the mounting panel, the rounded shape of the boundary portion between the mounting panel and the burring, etc. The contact mode with the fluctuates. For this reason, the water stop performance becomes unstable, and in some cases, water leakage may occur.

  Then, an object of this invention is to enable it to acquire more reliable water stop performance.

  In order to solve the above problems, a first aspect is a grommet that is attached to a through-hole formed in a vehicle body panel in a state of being attached to a wire harness, and the tubular wire into which the wire harness is inserted A harness insertion portion, an annular pressing portion that is provided so as to project around the wire harness insertion portion, and can be disposed to face one main surface of the vehicle body panel around the through hole, and around the wire harness insertion portion Are provided at intervals with respect to the annular pressing portion along the extending direction of the wire harness insertion portion, and can contact the inner peripheral portion of the through hole from the other main surface of the vehicle body panel. A positioning part and a water stop part disposed on the annular pressing surface side of the annular pressing part facing the positioning part, the water stopping part from the annular pressing surface toward the positioning part. A first annular water stop portion that expands gradually, a second annular water stop portion that gradually expands from the annular pressing surface toward the positioning portion on the outer peripheral side of the first annular water stop portion, An annular connecting portion that connects a distal end side peripheral portion of the first annular water stopping portion and a proximal end side peripheral portion of the second annular water stopping portion, and the annular connecting portion is formed on the second annular water stopping portion. It forms in the shape which goes to the front end side peripheral part of a said 1st cyclic | annular water stop part from the base end side peripheral part toward the inner peripheral side of the said water stop part.

  A 2nd aspect is a grommet concerning the 1st aspect, Comprising: The cross-sectional shape of the said annular connection part in the surface which passes along the axial direction of the said water stop part is a said 1st ring water stop part and a said 2nd ring shape. It is formed in a J shape that faces diagonally outward from the water stop.

  A 3rd aspect is a grommet concerning the 1st or 2nd aspect, Comprising: The said 2nd annular water stop part protrudes in the said positioning part side rather than the said 1st annular water stop part.

  A 4th aspect is a grommet as described in any one of 1st-3rd, Comprising: The part containing the said water stop part is formed with an elastic material, The part containing the said annular press part and the said positioning part Is formed of a material having higher rigidity than the water stop portion.

  A 5th aspect is a grommet as described in any one of 1st-3rd, Comprising: The said 1st cyclic | annular water stop part expands, curving so that it may become convex toward the said positioning part side. Including an outer peripheral portion.

  The wire harness with a grommet which concerns on a 6th aspect is a wire harness arrange | positioned through the through-hole formed in the panel, and 1st-5th with which the said wire harness was mounted | worn. And a grommet.

  According to the first aspect to the sixth aspect, when the positioning portion comes into contact with the inner peripheral portion of the through-hole from the other main surface of the vehicle body panel, the annular pressing portion causes the water-stopping portion around the through-hole. Press against one main surface of the body panel. Then, the first annular water blocking portion and the second annular water blocking portion are pressed against the one main surface of the vehicle body panel around the through hole. When the second annular water stop portion is tilted in the direction of being pushed down against the one main surface of the vehicle body panel, the annular connecting portion is inclined in the same direction, and the front end side peripheral portion of the first annular water stop portion is Press against one main surface of the body panel. Thereby, a 1st annular water stop part is pressed with respect to the one main surface of a vehicle body panel with bigger force, and more reliable water stop performance can be obtained.

  According to the 2nd aspect, the front end side peripheral part of a 1st cyclic | annular water stop part can be effectively pressed on the one main surface of a vehicle body panel.

  According to the third aspect, when the water stop portion is pressed against the one main surface of the vehicle body panel, the second annular water stop portion is first pressed against the one main surface of the vehicle body panel. Thereby, the front end side peripheral part of a 1st annular water stop part is more reliably pressed on the one main surface of a vehicle body panel, and more reliable water stop performance can be obtained.

  According to the 4th aspect, a water stop part can be more reliably pressed on the one main surface of a vehicle body panel by the cyclic | annular pressing part with high rigidity.

  According to the 5th aspect, a 1st water stop part can be made easy to deform | transform and the grommet attachment work force can be reduced.

It is a schematic perspective view which shows the wire harness with a grommet which concerns on embodiment. It is a perspective view which shows a resin component. It is a perspective view which shows an elastic component. It is a fragmentary sectional view in the IV-IV line of FIG. It is a fragmentary sectional view which shows the state which attached the grommet to the through-hole of the vehicle body panel. It is explanatory drawing which shows operation | movement of the water stop part at the time of mounting | wearing a grommet. It is explanatory drawing which shows operation | movement of the water stop part at the time of mounting | wearing a grommet.

  Hereinafter, the grommet and the wire harness with a grommet according to the embodiment will be described. 1 is a perspective view showing a wire harness with a grommet, FIG. 2 is a perspective view showing a resin component 30 of the grommet 20, FIG. 3 is a perspective view showing an elastic component 50 of the grommet 20, and FIG. It is a fragmentary sectional view in the IV-IV line of 1.

  The wire harness with grommets is configured such that the grommets 20 are mounted on the wire harness WH. In this state, the grommet 20 is attached to the through hole 12 formed in the vehicle body panel 10, whereby the wire harness WH is disposed through the through hole 12.

  Here, the vehicle body panel 10 is a plate-like member that partitions a space in the vehicle. As the vehicle body panel 10, for example, a panel that partitions a vehicle compartment and an engine room is assumed. The vehicle body panel 10 is generally a metal plate, and includes one main surface (here, the surface on the engine room side) and the other main surface (here, the surface on the vehicle compartment side). A through hole 12 is formed in the vehicle body panel 10. Here, the through hole 12 has an oval shape, but may have a circular shape or a polygonal shape. The inner peripheral portion of the through hole 12 is subjected to burring, and the inner peripheral portion of the through hole 12 is formed with a burring portion 14 that protrudes toward the other main surface of the vehicle body panel 10 toward the inner peripheral side. (See FIG. 5). Here, the burring part 14 is formed in the shape of an annular protrusion inclined obliquely toward the other main surface side of the vehicle body panel 10 from the inner peripheral part of the through hole 12 toward the inner peripheral side thereof. But the burring part may be formed in the cylinder shape which stands | starts up with respect to the vehicle body panel 10 perpendicularly | vertically. Further, the burring portion may be omitted.

  The wire harness WH includes at least one electric wire, and here includes a plurality of electric wires bound together. By disposing the wire harness WH through the through-hole 12, the wire harness WH is used as a wiring for electrically connecting electrical devices between two spaces defined by the vehicle body panel 10.

  The grommet 20 is attached to the through-hole 12 formed in the vehicle body panel 10 in a state where the grommet 20 is externally mounted on the wire harness WH. Here, the resin component 30 as the first component and the second It is comprised by the combination with the elastic component 50 which is these components.

  Schematically, the resin component 30 is a component for holding the grommet 20 in the through hole 12 of the vehicle body panel 10, and the elastic component 50 is a component for stopping water between the resin component 30 and the vehicle body panel 10. It is.

  The resin component 30 is a member formed of a resin such as PP (polypropylene), in particular, a resin having higher rigidity than the elastic component 50, and the resin component-side wire harness insertion portion 32 that is a first wire harness insertion portion; A large-diameter portion 36, a positioning portion 40, and an annular pressing portion 44 are provided.

  The resin component side wire harness insertion part 32 is formed in the cylindrical shape which can insert the wire harness WH. Here, the outer wire harness insertion part 33 extended from the axial direction one end side of the large diameter part 36 and the inner side wire harness insertion part 34 extended from the axial direction other end side of the large diameter part 36 are provided.

  The outer wire harness insertion portion 33 is formed in a cylindrical shape that bends in a direction orthogonal to the axial direction of the large diameter portion 36 from one axial end side of the large diameter portion 36. Accordingly, the wire harness WH is bent in a substantially L shape within the outer wire harness insertion portion 33 and pulled out to the side. In addition, an extending portion 33p is formed at the outward end portion of the outer wire harness insertion portion 33 so as to partially extend the cylindrical shape of the outer wire harness insertion portion 33 outward. With the wire harness WH inserted through the outer wire harness insertion part 33, the wire harness WH is wound around the outer wire harness insertion part 33 by wrapping an adhesive tape around a portion of the wire harness WH that the extension part 33 p covers. On the other hand, it is fixed. But the outer wire harness insertion part 33 may be a straight cylinder shape.

  The inner wire harness insertion part 34 is formed in a straight short cylinder shape (see FIG. 2). The inner space of the inner wire harness insertion portion 34 and the inner space of the outer wire harness insertion portion 33 are connected via a space in the large diameter portion 36, and the outer wire harness insertion portion 33 passes through the large diameter portion 36. Thus, one wire harness WH can be inserted into the inner wire harness insertion part 34.

  The large-diameter portion 36 is formed in a short long cylindrical shape that protrudes to the outer peripheral side between the outer wire harness insertion portion 33 and the inner wire harness insertion portion 34. The size of the large-diameter portion 36 is smaller than the through-hole 12 (about one time smaller), can be inserted into the through-hole 12, and is positioned on the outer periphery of the large-diameter portion 36. Can be locked to the inner peripheral portion of the through-hole 12.

  The annular pressing portion 44 is provided so as to protrude around the resin component-side wire harness insertion portion 32 and is configured to be disposed so as to face one main surface of the vehicle body panel 10 around the through hole 12.

  More specifically, the annular pressing portion 44 is formed on an oval annular plate member that projects from the outer peripheral portion of the large-diameter portion 36 on the inner wire harness insertion portion 34 side. The annular pressing portion 44 is formed larger than the through hole 12 and can be disposed around the through hole 12 so as to face one main surface of the vehicle body panel 10. A surface of the annular pressing portion 44 that faces the positioning portion 40 is formed as an annular pressing surface 45 that presses a water stop portion 60 described later toward one main surface of the vehicle body panel.

  An annular outer peripheral portion close to the root of the annular pressing portion 44 in the large diameter portion 36 is formed in an annular concave portion 36g that is recessed by one step from the annular outer peripheral portion on the outer wire harness insertion portion 33 side. Thereby, it can mount | wear with the water stop part 60 of the elastic component 50 positioned.

  A plurality of positioning portions 40 are provided around the resin component-side wire harness insertion portion 32, more specifically, around the large-diameter portion 36 at intervals. Here, a total of six positioning portions 40 are provided at two locations where the major axis passes and two locations where the minor axis passes among the outer peripheral portion of the large-diameter portion 36 having an oval shape. It has been.

  This positioning part 40 is an extending direction of the resin component side wire harness insertion part 32 (in the place where the annular pressing part 44 and the positioning part 40 are provided, the wire harness WH inserted in the resin part side wire harness insertion part 32 is provided. (Which is also the extending direction) with a space from the annular pressing portion 44, and is configured to be able to contact the inner peripheral portion of the through hole 12 from the other surface side of the vehicle body panel 10. ing.

  More specifically, the positioning portion 40 has a shape that extends while being inclined outwardly from the outer wire harness insertion portion 33 side portion of the outer periphery of the large diameter portion 36 toward the inner wire harness insertion portion 34. Is formed. Further, a claw portion 42 protrudes from the inside of the distal end portion of the positioning portion 40 (see FIGS. 4 and 5). When the large-diameter portion 36 is inserted into the through hole 12, the outward surface of the positioning portion 40 comes into contact with the inner peripheral portion of the through hole 12 and elastically deforms inward. When the large-diameter portion 36 is further inserted into the through hole 12 and the outward surface of the positioning portion 40 exceeds the inner peripheral portion of the through hole 12, the positioning portion 40 tends to return to the original shape by elastic force. Then, the inner peripheral part of the through-hole 12 is fitted in the concave part formed by the tip part of the positioning part 40 and the claw part 42. Thereby, the position regulation of the grommet 20 to the one main surface side of the vehicle body panel 10 can be performed. Moreover, it can also position so that the grommet 20 may not move freely in the through-hole 12 by the some positioning part 40 engaging with the inner peripheral part of the through-hole 12 in the outer peripheral part of the large diameter part 36. .

  The elastic component 50 is a component formed of an elastic material such as an elastomer (rubber or the like), and includes an elastic component-side wire harness insertion portion 52 that is a second wire harness insertion portion and an annular projecting portion 56.

  The elastic part side wire harness insertion part 52 is formed in a cylindrical shape through which the wire harness can be inserted. In the combined state of the resin component 30 and the elastic component 50, the inner wire harness insertion portion 34 is disposed in one end portion of the elastic component-side wire harness insertion portion 52 through the annular projecting portion 56. Thereby, the wire harness WH is arrange | positioned through the resin component side wire harness insertion part 32 and the elastic component side wire harness insertion part 52. FIG. Accordingly, when viewed as the grommet 20 as a whole, the resin component side wire harness insertion portion 32 and the elastic component side wire harness insertion portion 52 constitute a cylindrical wire harness insertion portion through which the wire harness WH is inserted.

  The elastic part-side wire harness insertion part 52 includes a base end side cylinder part 54 on the annular projecting part 56 side and a cylinder part 53 that is linearly connected to the base end side cylinder part 54.

  A plurality of annular protrusions along the circumferential direction are formed on the outer peripheral portion of the base end side cylindrical portion 54 along the longitudinal direction of the base end side cylindrical portion 54. In a state where the resin component 30 and the elastic component 50 are combined, the wire harness insertion portion 34 is inserted into the proximal end side cylindrical portion 54. When the operator holds the proximal end side cylinder part 54 by hand and inserts the grommet 20 into the through hole 12 of the vehicle body panel 10, the hand is unlikely to slide along the longitudinal direction of the proximal end side cylinder part 54. It has become.

  But you may form a base end side cylinder part in a bellows shape. In this case, the wire harness insertion part of the resin component may be omitted or shortened. Thereby, a wire harness can be easily bent in this base end side cylinder part, and the drawer direction can be adjusted.

  It is preferable that the cylinder part 53 is formed in the internal diameter of the grade which can clamp | tighten and hold the wire harness WH. Here, the inner diameter of the cylindrical portion 53 is set smaller than the inner diameter of the proximal end side cylindrical portion 54. Thereby, the wire harness WH can be fixed and held while water is stopped between the tube portion 53 and the wire harness WH. In particular, since the cylinder part 53 has elasticity, even when the diameter of the wire harness WH is large, the cylinder part 53 is extended and inserted into the cylinder part 53 to stop and fix the water. be able to.

  The annular projecting portion 56 is formed in an annular shape that is larger (one size larger) than the annular pressing portion 44. The annular projecting portion 56 includes a covering portion 57 provided on the opposite side of the positioning portion 40 with respect to the annular pressing portion 44, an outer peripheral covering portion 58 that covers the outer peripheral portion of the annular pressing portion 44, and the above-described annular pressing portion 44. The water stop part 60 arrange | positioned at the annular pressing surface 45 is provided. Between the covering portion 57 and the water stop portion 60, an annular groove 59 is formed which is a gap about the thickness of the annular pressing portion 44 and opens to the inner peripheral side of the annular overhang portion 56. Then, while the inner peripheral side portion 60 a of the water stop portion 60 is fitted into the annular recess 36 g of the large diameter portion 36, the annular pressing portion 44 is fitted into the annular groove 59 of the annular projecting portion 56, thereby The component 30 and the elastic component 50 are combined.

  The water stop portion 60 is formed in an oval shape like the annular pressing portion 44, and includes a first annular water stop portion 62, a second annular water stop portion 64, and an annular connecting portion 66.

  The first annular water stop 62 is an annular member that extends to the outer peripheral side of the inner peripheral side portion 60 a of the water stop 60, and is an elliptical ring that gradually expands from the annular pressing surface 45 toward the positioning portion 40. It is formed into a shape. The base end side peripheral edge portion of the first annular water stopping portion 62 is in contact with the annular pressing surface 45 of the annular pressing portion 44 via the inner peripheral side portion 60 a of the water stopping portion 60. In addition, the front end side peripheral part of the 1st annular water stop part 62 is set to the magnitude | size which contact | abuts the plane part which is not the burring part 14 with respect to the one main surface of the vehicle body panel 10. FIG.

  In addition, here, the first annular water blocking portion 62 expands as described above while curving so that it protrudes toward the positioning portion 40 side as a whole from the proximal end peripheral portion to the distal end peripheral portion. It is formed in an open shape. But only the outer peripheral side part of the 1st annular water stop part 62 may be formed in the shape which curves as mentioned above. Moreover, the whole from the base end side peripheral part of the 1st cyclic | annular water stop part 62 to a front end side peripheral part may be formed in the shape which expands straight at the same inclination angle.

  The second annular water stop 64 is an annular member extending from the outer peripheral side of the first annular water stop 62, here, from the annular portion on the positioning part 40 side of the outer peripheral cover 58. The second annular water stop 64 is a member that expands while being inclined to the same side as the first annular water stop 62, that is, an ellipse that gradually expands from the annular pressing surface 45 toward the positioning part 40. It is formed in an annular shape.

  Here, the whole from the base end side peripheral part of the first annular water stop part 62 to the front end side peripheral part of the second annular water stop part 64 is formed in a shape that expands straight at the same inclination angle. But the 2nd annular water stop part 64 may also be expanded, curving similarly to the said 1st annular water stop part 62. Moreover, the 2nd annular water stop part 64 is formed in the shape which becomes thin gradually toward the front end side.

  Further, the second annular water stop 64 protrudes toward the positioning part 40 from the first annular water stop 62. However, this is not essential, and for example, the second annular water stop 64 may have the same protruding height as the first annular water stop 62.

  The annular connecting portion 66 is formed in an annular shape that connects the distal end side peripheral portion of the first annular water stop portion 62 and the proximal end side peripheral portion of the second annular water stop portion 64.

  Here, the distal end side peripheral portion of the first annular water stop portion 62 is located on the inner peripheral side with respect to the proximal end side peripheral portion of the second annular water stop portion 64. More specifically, the peripheral edge on the front end side of the first annular water stop 62 is located at the same position as the outer periphery of the annular pressing part 44 or a position slightly on the inner periphery from the outer periphery, and the second annular water stop The base end side peripheral portion of the portion 64 is at a position around the outer periphery of the annular pressing portion 44. For this reason, the front end side peripheral portion of the first annular water stop portion 62 is slightly closer to the inner peripheral side than the proximal end side peripheral portion of the second annular water stop portion 64.

  The annular connecting portion 66 is formed in a shape that faces the distal end side peripheral portion of the first annular water stopping portion 62 from the proximal end peripheral portion of the second annular water stopping portion 64 toward the inner peripheral side of the water stopping portion 60. Has been. In other words, the annular connecting portion 66 is formed in an annular shape that expands in diameter after shrinking in the middle from the proximal end side peripheral portion of the second annular water stop portion 64 toward the distal end side peripheral portion of the first annular water stop portion 62. Is formed.

  In addition, after the annular connecting portion 66 is directed from the base end side peripheral portion of the second annular water stop portion 64 toward the inner peripheral side of the water stop portion 60, until the middle is directed to the distal end side peripheral portion of the first annular water stop portion 62. The annular connecting portion 66 draws the above shape while being curved.

  That is, when the annular connecting portion 66 is observed in a cross section passing through the axial direction of the water stopping portion 60 (that is, a cross sectional shape in the radial direction of the annular connecting portion 66), the cross sectional shape is the first annular water stopping portion 62 and the first water stopping portion 62. It is formed in the shape which makes J character between the 2 annular water stop parts 64. FIG. That is, the cross-sectional shape of the annular coupling portion 66 includes an arc-shaped portion 66a and a linear portion 66b extending from one end of the arc-shaped portion 66a. The other end portion of the arc-shaped portion 66 a is connected to the proximal end side peripheral portion of the second annular water blocking portion 64 and is in contact with the annular pressing surface 45. The straight portion 66 b is disposed in a posture that is inclined outward from the one end portion of the arc-shaped portion 66 a toward the positioning portion 40, and the tip portion of the straight portion 66 b is on the tip side of the first annular water blocking portion 62. It is connected to the peripheral edge. And the J-shaped cross-sectional shape of the annular connecting portion 66 is a posture that faces obliquely outward between the first annular water stopping portion 62 and the second annular water stopping portion 64.

  An operation when the grommet 20 configured as described above is mounted in the through hole 12 of the vehicle body panel 10 will be described.

  That is, the wire harness WH extending from the outer wire harness insertion portion 33 of the resin component 30 is inserted through the through hole 12 and penetrates the outer wire harness insertion portion 33 and the large diameter portion 36 of the resin component 30. Insert into hole 12.

  Then, the inner peripheral part of the through-hole 12 contacts the outer peripheral part of each positioning part 40, and each positioning part 40 is elastically deformed to the inner peripheral side.

  Further, during the insertion of the large-diameter portion 36 into the through hole 12, the front end side peripheral portion of the second annular water blocking portion 64 abuts on one main surface of the vehicle body panel 10 (see FIG. 6). Then, the second annular water stop 64 is supported by the annular pressing portion 44 at the base end side peripheral edge, that is, the portion of the annular connecting portion 66 extending to the inner peripheral side of the second annular water stop 64 is a fulcrum P. As shown in FIG. 7 (see arrow A1). In addition, the proximal end side peripheral part of the second annular water blocking part 64 may be supported in direct contact with the annular pressing surface 45. Then, in connection with this, the force which inclines the annular connection part 66 in the same direction as the 2nd annular water stop part 64 acts. First, the force tends to incline the arc-shaped portion 66a of the annular connecting portion 66 toward the outer periphery with the fulcrum P as the center (see arrow A2 in FIG. 7). Here, the front end side peripheral portion of the annular connecting portion 66 is connected to the front end side peripheral portion of the first annular water blocking portion 62, and movement to the outer peripheral side thereof is suppressed to some extent. For this reason, the portion on the one main surface side of the vehicle body panel 10 in the linear portion 66b of the annular connecting portion 66 is maintained at a substantially constant position in the inner and outer directions, and the portion on the annular pressing portion 44 side in the linear portion 66b. Tries to move to the outer periphery. As a result, the linear portion 66b of the annular connecting portion 66 is urged so as to have a posture along the axial direction. As a result, the connecting portion to the first annular water blocking portion 62 and the first portion of the annular connecting portion 66 are The peripheral edge portion on the front end side of the one annular water blocking portion 62 is pushed in a direction to be pressed against one main surface of the vehicle body panel 10 (see arrow A3 in FIG. 7). In other words, the linear portion 66b of the annular coupling portion 66 is compressed between the annular pressing surface 45 and the one main surface of the vehicle body panel 10 in a state where the linear portion 66b rises in a posture along the axial direction. It becomes a state.

  Soon, each positioning part 40 gets over the inner peripheral part of the through hole 12 and the tip part of each positioning part 40 is locked to the inner peripheral part of the through hole 12. The first annular water stop 62 and the second annular water stop 64 thus brought into contact with one main surface of the vehicle body panel 10. Thereby, the one main surface of the vehicle body panel 10 and the grommet 20 are in a state where water is doubled by the first annular water stop 64 and the second annular water stop 64.

  According to the grommet 20 configured as described above, when the positioning portion 40 comes into contact with the inner peripheral portion of the through hole 12 from the other main surface of the vehicle body panel 10, the annular pressing portion 44 causes the water stop portion 60 to pass through the through hole. 12 is pressed around one main surface of the vehicle body panel 10. Then, the first annular water blocking portion 62 and the second annular water blocking portion 64 are pressed against the one main surface of the vehicle body panel 10 around the through hole 12. When the second annular water blocking portion 64 is pressed against the one main surface of the vehicle body panel 10 and tilts in the direction of falling to the outer peripheral side, the annular coupling portion 66 tends to tilt in the same direction. Thereby, the front end side peripheral portion of the first annular water blocking portion 62 is strongly pressed against the one main surface of the vehicle body panel 10. Moreover, the front end side peripheral part of the 1st annular water stop part 62 and the one main surface of the vehicle body panel 10 contact with the largest possible contact area. Accordingly, double water stoppage is performed between the one main surface of the vehicle body panel 10 and the grommet 20 by the first annular water stop portion 62 and the second annular water stop portion 64, and the first annular water stop portion 62. Is strongly pressed against the one main surface of the vehicle body panel 10 to ensure more reliable water stoppage. Thereby, more reliable water stop performance can be obtained.

  In particular, since the cross-sectional shape of the annular connecting portion 66 is curved in a J-shape that faces diagonally outward between the first annular water stopping portion 62 and the second annular water stopping portion 64, When the portion 66 is inclined as described above, the straight portion 66b connected to the first annular water blocking portion 62 is effectively directed to the one main surface of the vehicle body panel 10 while suppressing bending at a specific location. Can be pressed. Thereby, the 1st cyclic | annular water stop part 62 can be pressed on the one main surface of the vehicle body panel 10 with a stronger force, and more reliable water stop performance can be obtained.

  Moreover, since the said water stop structure is a structure which does not depend on the shape of the burring part 14, it can aim at more reliable water stop irrespective of the shape of a burring part 14, an angle, etc.

  Moreover, since the 2nd annular water stop part 64 protrudes rather than the 1st annular water stop part 62, when pressing the water stop part 60 against one main surface of the vehicle body panel 10, the 2nd annular water stop part 64 is First, it comes into contact with one main surface of the body panel 10. Thereby, the front end side peripheral part of the 1st cyclic | annular water stop part 62 is more strongly pressed against the one main surface of the vehicle body panel 10, and more reliable water stop performance can be obtained.

  Moreover, since the part containing the water stop part 60 is formed as the elastic part 50 with the elastic material, and the part containing the annular pressing part 44 and the positioning part 40 is formed as the part 30 with the resin, the highly rigid annular pressing. The water stop portion 60 formed of an elastic material can be more reliably pressed against the one main surface of the vehicle body panel 10 by the portion 44.

  Further, the elastic component 50 has an advantage that it has excellent sealing properties, and the resin component 30 has an advantage that it can be manufactured at a low cost. Therefore, by combining the two parts as described above, it is possible to obtain the grommet 20 having low cost and excellent sealing performance.

  Further, it is not essential that the grommet 20 is composed of two members. For example, the entire grommet may be formed of an elastic material such as rubber. In this case, by forming the annular pressing portion thick, or by inserting other high-rigidity parts into the annular pressing portion, the strength capable of pressing the water stop portion against the vehicle body panel is obtained. be able to.

  Moreover, since the outer peripheral side of the 1st annular water stop part 62 is curving, the outer peripheral side of the said 1st annular water stop part 62 is in the state inclined more to the outer peripheral side. For this reason, when the 1st annular water stop part 62 is pressed on the one main surface of the vehicle body panel 10, it deform | transforms easily. Thereby, the 1st cyclic | annular water stop part 62 can be made easy to deform | transform and the attachment work force of the grommet 20 can be reduced. Moreover, the contact area of the 1st annular water stop part 62 and the one main surface of the vehicle body panel 10 can be enlarged, and the certainty of water stop can also be aimed at from this point.

{Modifications}
In addition, in the said embodiment, although it was the double water stop structure of the 1st annular water stop part 62 and the 2nd annular water stop part 64, another another annular water stop part may be provided.

  Moreover, the magnitude | size and shape of the 2nd annular water stop part 64 of the said 1st annular water stop part 62 can be changed variously. Thereby, the attachment work force at the time of attaching the grommet 20 to the vehicle body panel 10 can be changed.

  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 Body panel 12 Through-hole 20 Grommet 30 Resin component 32 Resin component side wire harness insertion part 34 Wire harness insertion part 40 Positioning part 44 Annular press part 45 Annular press surface 50 Elastic part 52 Elastic part side wire harness insertion part 56 Annular overhang Part 60 Water stop part 62 First annular water stop part 64 Second annular water stop part 66 Annular connecting part WH Wire harness

Claims (6)

A grommet that is attached to a through hole formed in a vehicle body panel in a state of being attached to a wire harness,
A tubular wire harness insertion part through which the wire harness is inserted; and
An annular pressing portion that is provided so as to project around the wire harness insertion portion, and that can be disposed around the through-hole and facing one main surface of the vehicle body panel;
Around the wire harness insertion portion, the other end of the vehicle body panel is provided with an interval from the annular pressing portion along the extending direction of the wire harness insertion portion, with respect to the inner peripheral portion of the through hole. A positioning part capable of contacting from the surface;
A water stop portion disposed on the annular pressing surface side facing the positioning portion of the annular pressing portion,
With
The water stop portion is a first annular water stop portion that gradually expands from the annular pressing surface toward the positioning portion, and an outer peripheral side of the first annular water stop portion. A second annular water stop portion that gradually expands toward the end, an annular connection portion that connects a distal end side peripheral portion of the first annular water stop portion and a proximal end side peripheral portion of the second annular water stop portion; The annular connecting portion is shaped so as to go from the proximal end side peripheral portion of the second annular water stop portion toward the inner peripheral side of the water stop portion and then toward the distal end side peripheral portion of the first annular water stop portion. Grommet that is formed in. The grommet according to claim 1,
The cross-sectional shape of the annular coupling portion on the surface passing through the axial direction of the water stop portion is a J-shape that faces obliquely outward between the first annular water stop portion and the second annular water stop portion. Grommet that is formed. A grommet according to claim 1 or claim 2, wherein
The grommet in which the second annular water stop portion protrudes closer to the positioning portion than the first annular water stop portion. The grommet according to any one of claims 1 to 3, wherein
The portion including the water stop portion is formed of an elastic material,
A grommet in which a portion including the annular pressing portion and the positioning portion is formed of a material having higher rigidity than the water stop portion. The grommet according to any one of claims 1 to 4, wherein
The first annular water stop part is a grommet including an outer peripheral side part that is expanded so as to be convex toward the positioning part side. A wire harness disposed through a through-hole formed in the panel;
The grommet according to any one of claims 1 to 5, which is attached to the wire harness,
Wire harness with grommet.

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