JP2005190973A - Grommet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grommet which can be easily mounted on a panel. <P>SOLUTION: The grommet 1 integrating a widened-diameter cylinder part 11 and ribs 12 is mounted on a hole 3 of a panel 2. A locking concave part 13 is formed on the other end part 11b at a larger diameter side of the widened-diameter cylinder part 11. The locking concave part 13 is fitted to the hole 3 of the panel 2. The ribs 12 are formed into a convex shape at the outer face 11c of the widened-diameter cylinder part 11. A concave groove 19 is formed on a surface 19a of the ribs 12. The concave-shaped groove 19 is formed on each rib 12 in plurality. The concave grooves 19 linearly extend along a direction of an axial core P of the widened-diameter cylinder part 11, namely, an insertion direction of the widened-diameter part 11 into the hole 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a grommet that is attached to a panel constituting a vehicle body such as an automobile as a vehicle and that passes a wire harness inside.

  In order to pass a wire harness through a hole provided in a panel constituting a vehicle body such as an automobile as a vehicle and prevent moisture (liquid) such as water from adhering to the wire harness, for example, FIG. Conventionally, various grommets 101 (see, for example, Patent Document 1) have been used. A grommet 101 illustrated in FIG. 17 includes a cylindrical portion 102, an enlarged diameter cylindrical portion 103 that is connected to the cylindrical portion 102, and whose inner and outer diameters gradually increase from one end to the other end. It is integrally provided with a locking recess 104 that is provided over the periphery and that locks into the hole of the panel, and is made of rubber or the like.

The aforementioned grommet 101 is inserted into the hole of the panel from the end of the cylindrical portion 102 and the small diameter side of the enlarged diameter cylindrical portion 103 through the wire harness through the enlarged diameter cylindrical portion 103. After the diameter-enlarging cylindrical portion 103 is elastically deformed in the direction of reducing the diameter (indicating that the inner and outer diameters are reduced), the locking recess 104 is locked in the hole and attached to the panel described above. Thus, the conventional grommet 101 has been elastically deformed once in the direction of reducing the diameter of the enlarged diameter cylindrical portion 103 and attached to the panel.
JP-A-7-163034

  The above-described conventional grommet 101 forms the above-described locking recess 104 in order to keep watertight with the panel after being attached to the panel (to ensure waterproofness with the panel). It is necessary to increase the thickness of the wall 105 (shown in FIG. 18) on the small diameter side of the expanded diameter cylindrical portion 103. Further, when the grommet 101 is attached to the panel, it is necessary to press-fit the hole into the hole with a force stronger than the elastic restoring force of the wall 105 described above, particularly the above-described wall 105. For this reason, the conventional grommet 101 is not easily elastically deformed in the direction in which the above-described wall 105 is reduced in diameter, and needs to be press-fitted into the hole of the panel with a relatively strong force.

  For this reason, when the conventional grommet 101 is attached to the panel, the large-diameter cylindrical portion 103 is not easily elastically deformed. Therefore, a large frictional force is generated between the surface of the large-diameter cylindrical portion 103 and the inner edge of the hole in the panel. It was difficult to attach to the panel. Furthermore, in the worst case, the surface of the enlarged diameter cylindrical portion 103 may be damaged by the frictional force generated between the surface of the enlarged diameter cylindrical portion 103 and the inner edge of the hole of the panel.

  Accordingly, an object of the present invention is to provide a grommet that can be easily attached to a panel.

  In order to solve the problems and achieve the object, the grommet according to the first aspect of the present invention has a cylindrical shape with the inner and outer diameters gradually increasing from the small-diameter end to the large-diameter end. A diameter-enlarged cylinder part formed through which the wire harness is passed, and a locking recess provided at an end part on the large-diameter side of the diameter-enlarged cylinder part, wherein the diameter-enlarged cylinder part is an end part on the small-diameter side In the grommet that is inserted into the hole of the panel from the side and the locking recess is locked in the hole, a plurality of ribs that protrude from the outer surface of the enlarged-diameter cylindrical portion and a recess that protrudes from the surface of the plurality of ribs And a concave groove extending linearly along the axis of the enlarged diameter cylindrical portion.

  A grommet according to a second aspect of the present invention is the grommet according to the first aspect, wherein the ribs are spaced apart in the circumferential direction of the enlarged diameter cylindrical portion and along the axis of the enlarged diameter cylindrical portion. It is characterized by extending in a straight line.

  A grommet according to a third aspect of the present invention is the grommet according to the first or second aspect, wherein a plurality of the concave grooves are provided in each rib.

  The grommet according to a fourth aspect of the present invention is the grommet according to any one of the first to third aspects, wherein the depth from the surface to the bottom of the rib of the concave groove is the expansion of the rib. It is characterized by being shallower than the amount of protrusion from the outer surface of the diameter cylindrical portion.

  A grommet according to a fifth aspect of the present invention is the grommet according to any one of the first to third aspects, wherein the depth from the surface to the bottom of the rib of the concave groove is the expansion of the rib. It is characterized by being deeper than the protruding amount from the outer surface of the diameter tube portion.

  The grommet of the present invention according to claim 6 is a diameter-enlarged cylinder in which the inner and outer diameters gradually increase from the end on the small diameter side toward the end on the large diameter side, and is formed in a cylindrical shape to pass the wire harness inside. And a locking recess provided at an end portion on the large-diameter side of the enlarged-diameter cylinder portion, and the enlarged-diameter cylinder portion is inserted into a hole in the panel from the end portion on the small-diameter side, A grommet in which a stop recess engages in the hole is provided with a plurality of ribs protruding from the outer surface of the diameter-expanded cylindrical portion, and a plurality of recesses and protrusions are formed on the surfaces of the plurality of ribs.

  According to the grommet of the present invention described in claim 1, a plurality of ribs protruding from the outer surface of the enlarged diameter cylindrical portion are provided. Furthermore, a concave groove recessed from the surface of the rib is provided. For this reason, when attaching to a panel, only the front-end | tip of the side away from the diameter expansion cylinder part of a rib contacts a panel. Thus, when attached to a panel, the contact area with the panel is reduced.

  Furthermore, the concave groove extends linearly along the axis of the enlarged diameter cylindrical portion. For this reason, when press-fitting into the hole of the panel along the axial center of the enlarged diameter cylindrical portion, the surface of the rib can be prevented from being caught by the inner edge of the hole of the panel. Therefore, it is possible to reduce friction between the rib surface and the inner edge of the panel hole when press-fitted into the hole of the panel along the axis of the enlarged diameter cylindrical portion.

  According to the grommet of the present invention described in claim 2, since the rib extends along the axis of the enlarged diameter cylindrical portion, when press-fitting into the hole of the panel along the axis of the enlarged diameter cylindrical portion. The rib surface can be reliably prevented from being caught by the inner edge of the hole of the panel. Therefore, it is possible to further reduce the friction between the surface of the rib and the inner edge of the hole in the panel when press-fitting into the hole in the panel along the axis of the diameter-enlarging cylindrical portion.

  According to the grommet of the present invention described in claim 3, a plurality of concave grooves are provided in each rib. For this reason, when attached to a panel, a contact area with this panel can be made smaller.

  According to the grommet of the present invention as set forth in claim 4, when attached to the panel, the contact area with the panel can be reduced.

  According to the grommet of the present invention described in claim 5, the depth of the concave groove is deeper than the protruding amount of the rib. For this reason, when it press-fits into the hole of a panel, it is easy to deform | transform in the direction where a diameter expansion cylinder part is diameter-reduced (it shows that an inner-outer diameter reduces).

  According to the grommet of the present invention described in claim 6, a plurality of convex ribs are provided from the outer surface of the enlarged diameter cylindrical portion. Further, a large number of irregularities are provided on the surface of the rib. For this reason, when attaching to a panel, only the front-end | tip of the side away from the enlarged diameter cylindrical part of the unevenness | corrugation of a rib contacts a panel. Thus, when attached to a panel, the contact area with the panel is reduced.

  As described above, when the present invention is attached to a panel, the contact area with the panel is reduced. For this reason, when attaching to a panel, a local compressive deformation occurs in the location in which the rib and the rib of the diameter expansion cylinder part were provided, and it becomes easy to elastically deform in the direction where a diameter expansion cylinder part is diameter-reduced. For this reason, it can attach to the panel which comprises a vehicle body easily.

  Furthermore, since the concave groove extends linearly along the axis of the enlarged diameter cylindrical portion, the surface of the rib becomes a hole in the panel when press-fitting into the hole of the panel along the axis of the enlarged diameter cylindrical portion. Can be prevented from being caught on the inner edge of the. For this reason, it is possible to reduce friction between the surface of the rib and the inner edge of the hole of the panel when being press-fitted into the hole of the panel along the axis of the enlarged diameter cylindrical portion, and it can be more easily attached to the panel constituting the vehicle body. it can.

  According to the second aspect of the present invention, since the rib extends along the axis of the enlarged diameter cylindrical portion, the surface of the rib when press-fitted into the hole of the panel along the axis of the enlarged diameter cylindrical portion Friction with the inner edge of the hole of the panel can be further reduced. Therefore, it can be attached to the panel constituting the vehicle body more easily.

  According to the third aspect of the present invention, since a plurality of concave grooves are provided in each rib, the contact area with the panel can be further reduced. For this reason, when attaching to a panel, a local compressive deformation occurs reliably in the location in which the rib and the rib of the enlarged diameter cylinder part were provided, and it becomes easy to elastically deform by the direction which a diameter-expanded cylinder part shrinks. For this reason, it can attach to the panel which comprises a vehicle body more easily.

  According to the fourth aspect of the present invention, since the contact area with the panel can be reduced when being attached to the panel, it can be attached to the panel constituting the vehicle body more easily.

  According to the fifth aspect of the present invention, since the depth of the concave groove is deeper than the protruding amount of the rib, when press-fitting into the hole of the panel, the groove is locally located near the bottom and the bottom of the concave groove of the enlarged diameter cylindrical portion. Therefore, it becomes easy to be surely elastically deformed in the direction in which the diameter-enlarged cylindrical portion is reduced in diameter. For this reason, it can attach to the panel which comprises a vehicle body more easily.

  When the present invention is attached to a panel, the contact area with the panel is reduced. For this reason, when attaching to the panel, the inner edge of the panel makes point contact with the surface of the rib, reducing the friction between the surface of the rib and the inner edge of the hole in the panel, and easy insertion into the hole in the panel Can be done. Therefore, it can be easily attached to the panel constituting the vehicle body.

  Hereinafter, a grommet according to a first embodiment of the present invention will be described with reference to FIGS. A grommet 1 (shown in FIGS. 1 to 8) according to a first embodiment of the present invention is provided on a panel 2 (shown in FIGS. 1, 7, and 8) that constitutes a vehicle body such as an automobile as a vehicle. It is attached to the hole 3. An annular ring portion 4 is erected from the inner edge of the hole 3 of the panel 2. The ring portion 4 is formed integrally with the panel 2. In the case shown in FIG. 1, the hole 3 has a round planar shape.

  The grommet 1 is formed in a cylindrical shape and passes a wire harness 5 (indicated by a two-dot chain line in FIG. 7) routed inside the automobile. The grommet 1 keeps water tightness between the panel 2 and prevents moisture (liquid) such as water from entering inside from the space between the panel 2, and moisture (liquid) such as water enters the wire harness 5. ) Is prevented.

  The grommet 1 is made of rubber or the like as an elastic material that can be elastically deformed. As shown in FIGS. 1 to 3, the grommet 1 integrally includes a small-diameter cylindrical portion 10 formed in a cylindrical shape, an enlarged-diameter cylindrical portion 11, a plurality of ribs 12, and a plurality of concave grooves 19. Yes. The small-diameter cylindrical portion 10 is formed in a cylindrical shape, and allows the wire harness 5 (indicated by a two-dot chain line in FIG. 7) to pass inside. The outer diameter of the small diameter cylindrical portion 10 is smaller than the inner diameter of the hole 3. The enlarged diameter cylindrical portion 11 is formed in a cylindrical shape in which the inner and outer diameters gradually increase toward the other end portion 11b as one end portion 11a continues to the small diameter cylindrical portion 10 and moves away from the small diameter cylindrical portion 10. Yes. The enlarged diameter cylindrical portion 11 is arranged coaxially with the small diameter cylindrical portion 10 and is connected to the small diameter cylindrical portion 10 in series.

  In addition, the one end part 11a of the enlarged diameter cylinder part 11 has comprised the edge part by the side of a small diameter, and the other end part 11b has comprised the edge part by the side of a large diameter. Moreover, the enlarged diameter cylinder part 11 lets the wire harness 5 which passes the inside of the small diameter cylinder part 10 pass inside. The outer diameter of the one end portion 11 a of the enlarged diameter cylindrical portion 11 is smaller than the inner diameter of the hole 3, and the outer diameter of the other end portion 11 b of the enlarged diameter cylindrical portion 11 is larger than the inner diameter of the hole 3.

  The other end portion 11b of the enlarged diameter cylindrical portion 11 is provided with a locking recess 13 over the entire circumference. As shown in FIG. 4 and the like, the locking recess 13 is formed to be recessed from the outer surface 11 c of the diameter-expanded cylindrical portion 11. As shown in FIGS. 4 and 5, the locking recess 13 is formed along the first wall 14 near the other end portion 11 b and the axis P (indicated by a one-dot chain line in the drawing) of the enlarged diameter cylindrical portion 11. The second wall 15 near the one end 11a facing the first wall 14 and the groove 16 provided between the first wall 14 and the second wall 15 are formed.

  A convex lip 17 toward the second wall 15 is provided on the outer edge of the first wall 14 over the entire circumference. The second wall 15 is provided at the above-mentioned other end portion 11 b of the enlarged diameter cylindrical portion 11, and is disposed closer to the one end portion 11 a than the first wall 14. The groove 16 has a lip 18 protruding from the bottom surface of the concave groove over the entire circumference.

  The locking recess 13 described above is inserted into the hole 3 of the panel 2 from the one end portion 11a along the arrow K (shown in FIG. 1 or the like), and the second wall 15 Is once bent to the inside of the enlarged diameter cylindrical portion 11. Then, the bottom surface of the groove 16 is brought into contact with the inner surface of the hole 3 of the panel 2, the second wall 15 is returned to the initial state by an elastic restoring force, and is locked in the hole 3 of the panel 2. At this time, as shown in FIGS. 7 and 8, the lip 18 is in contact with the hole 3 of the panel 2 and the inner surface of the ring portion 4, and keeps watertight between the hole 3 and the inner surface of the ring portion 4. . Further, at this time, as shown in FIGS. 7 and 8, the lip 17 is in contact with the surface of the panel 2 to keep watertight between the surface of the panel 2.

  Further, the direction of inserting the arrow K, that is, the grommet 1 (the enlarged diameter cylindrical portion 11) into the hole 3 of the panel 2 is parallel to the diameter enlarged cylindrical portion 11, that is, the axis P of the grommet 1. That is, the grommet 1 is inserted into the hole 3 of the panel 2 along the diameter-expanded cylindrical portion 11, that is, the axis P of the grommet 1. In addition, the initial state mentioned above has shown the state which the diameter expansion cylinder part 11, ie, the grommet 1, is not elastically deforming.

  As shown in FIGS. 2 to 7, the rib 12 is convex from the outer surface 11 c of the enlarged diameter cylindrical portion 11 and extends linearly along the axis P. The rib 12 is arranged closer to the one end 11 a than the locking recess 13. The rib 12 is provided from the one end portion 11 a of the enlarged diameter cylindrical portion 11 to the second wall 15. The plurality of ribs 12 are provided at equal intervals along the circumferential direction around the axis P of the diameter-enlarged cylindrical portion 11.

  Each of the ribs 12 extends linearly along the axis P described above. When the plurality of ribs 12 are inserted into the hole 3 of the panel 2 in the diameter-expanded cylindrical portion 11, that is, the grommet 1, the portion between the one end portion 11 a and the other end portion 11 b is the hole of the panel 2 in the initial state. 3 contacts the inner edge.

  A plurality of concave grooves 19 are provided in each rib 12. The concave groove 19 is formed concave from the surface 12 a of the rib 12. The concave groove 19 extends linearly along the axis P. As shown in FIG. 6, the concave groove 19 is formed in a V-shaped cross section. The plurality of concave grooves 19 provided in each rib 12 are arranged in parallel to each other without being spaced apart from each other (adjacent to each other). For this reason, the space between the adjacent concave grooves 19 is formed in a mountain shape (also referred to as a triangle shape or an inverted V shape) that is convex in the outer peripheral direction of the enlarged diameter cylindrical portion 11.

  Further, the depth D of the concave groove 19 from the surface 12a of the rib 12 to the bottom of the concave groove 19 is a distance H from the outer surface 11c of the enlarged diameter cylindrical portion 11 to the surface 12a of the rib 12 as shown in FIG. Shallower. That is, the depth D from the surface 12 a to the bottom of the rib 12 of the concave groove 19 is shallower than the protruding amount H of the rib 12 from the outer surface 11 c of the enlarged diameter cylindrical portion 11. For this reason, the concave groove 19 is formed in the rib 12 and does not reach the enlarged diameter cylindrical portion 11.

  When the grommet 1 having the above-described configuration is attached to the panel 2, first, the small-diameter cylindrical portion 10 and the hole 3 of the panel 2 are opposed to each other along the axis P. Then, along the arrow K, that is, along the axis P, the diameter-expanded cylinder part 11 or grommet 1 is gradually inserted into the hole 3 from the small-diameter cylinder part 10 or one end part 11a. Then, the rib 12 contacts the inner edge of the hole 3 of the panel 2.

  Furthermore, when the diameter-expanded cylindrical portion 11, that is, the grommet 1 is inserted (press-fitted) into the hole 3 of the panel 2, the rib 12 faces the inner side of the diameter-expanded cylindrical portion 11 by the inner surface of the hole 3 and the ring portion 4. Pressed. Then, the diameter-expanded cylindrical portion 11 is elastically deformed in a direction in which the inner and outer diameters are reduced. That is, the diameter-expanded cylindrical portion 11 is elastically deformed in the direction of reducing the diameter (indicating that the inner and outer diameters are reduced).

  The hole 3 and the ring portion 4 of the panel 2 are located in the groove 16. Then, as shown in FIGS. 7 and 8, the lip 18 contacts the hole 3 of the panel 2 and the inner surface of the ring portion 4, and the lip 17 contacts the surface of the panel 2. Thus, the lips 17 and 18 are kept watertight between the panel 2 and the locking recess 13 is locked in the hole 3 of the panel 2, so that the grommet 1 is attached to the panel 2.

  According to the present embodiment, a plurality of ribs 12 that are convex from the outer surface 11 c of the enlarged diameter cylindrical portion 11 are provided. Furthermore, a concave groove 19 that is concave from the surface 12 a of the rib 12 is provided. For this reason, when attaching to the panel 2, the front-end | tip 12b (shown in FIG. 6) of the rib 12 at the side away from the diameter-expanding cylinder part 11 contacts with the panel 2. FIG. Thus, when attached to the panel 2, the contact area with the panel 2 is reduced. For this reason, when attaching to the panel 2, local compressive deformation occurs in the location where the rib 12 and the rib 12 of the enlarged diameter cylindrical portion 11 are provided, and it is easy to elastically deform in the direction in which the enlarged diameter cylindrical portion 11 is reduced in diameter. Become.

  Further, the concave groove 19 extends linearly along the diameter-expanded cylindrical portion 11, that is, the axis P of the grommet 1. For this reason, it is possible to prevent the surface 12a of the rib 12 from being caught by the inner edge of the hole 3 of the panel 2 when press-fitting into the hole 3 of the panel 2 along the axis P of the enlarged diameter cylindrical portion 11. Therefore, the friction between the surface 12a of the rib 12 and the inner edge of the hole 3 of the panel 2 when press-fitting into the hole 3 of the panel 2 along the axis P of the diameter-enlarging cylindrical portion 11 can be reduced. Therefore, it can be easily attached to the panel 2 constituting the vehicle body.

  Further, since the rib 12 extends along the axis P of the enlarged diameter cylindrical portion 11, when the rib 12 is press-fitted into the hole 3 of the panel 2 along the axis P of the enlarged diameter cylindrical portion 11, the surface of the rib 12. It can prevent more reliably that 12a is caught in the inner edge of the hole 3 of the panel 2. FIG. Therefore, the friction between the surface 12a of the rib 12 and the inner edge of the hole 3 of the panel 2 when press-fitting into the hole 3 of the panel 2 can be further reduced, and can be easily attached to the panel 2 constituting the vehicle body.

  Further, a plurality of concave grooves 19 are provided in each rib 12. For this reason, when attached to the panel 2, the contact area with the panel 2 can be made smaller. Therefore, it can attach to the panel 2 which comprises a vehicle body much more easily.

  Next, a grommet according to a second embodiment of the present invention will be described with reference to FIGS. Note that the same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIGS. 9 to 12, the grommet 1 of the present embodiment is similar to the first embodiment described above in that the small-diameter cylindrical portion 10, the enlarged-diameter cylindrical portion 11, the ribs 12, the concave grooves 19, and the like. It has. Further, as shown in FIG. 13, the grommet 1 is provided with a locking recess 13 in the other end portion 11 b of the enlarged diameter cylindrical portion 11, as in the first embodiment described above.

  Further, in the grommet 1 of the present embodiment, as shown in FIG. 14, the depth D of the groove 19 from the surface 12 a of the rib 12 to the bottom of the groove 19 is from the outer surface 11 c of the enlarged diameter cylindrical portion 11 to the rib. 12 is deeper than the distance H to the surface 12a. That is, the depth D from the surface 12 a to the bottom of the rib 12 of the concave groove 19 is deeper than the protruding amount H of the rib 12 from the outer surface 11 c of the enlarged diameter cylindrical portion 11. For this reason, the concave groove 19 reaches the diameter-expanded cylindrical portion 11 and is formed in both the rib 12 and the diameter-expanded cylindrical portion 11.

  The grommet 1 of this embodiment is also press-fitted into the hole 3 of the panel 2 from the small-diameter cylindrical portion 10 side and attached to the panel 2 as in the first embodiment described above. At this time, since the depth D of the concave groove 19 is deeper than the protrusion amount H and the concave groove 19 reaches the diameter-expanded cylindrical portion 11, when the surface of the rib 12 is pressed from the inner edge of the hole 3 of the panel 2. The enlarged diameter cylindrical portion 11 is once elastically deformed so that the concave groove 19 is narrowed and the entire rib 12 is submerged inside the enlarged diameter cylindrical portion 11. And the panel 2 is positioned in the latching recessed part 13, and the grommet 1 is displaced toward an initial state with an elastic restoring force, and is attached to the panel 2. FIG. Thus, the locking recess 13 is locked in the hole 3 of the panel 2, and the grommet 1 is attached to the panel 2.

  Also in the present embodiment, a plurality of convex ribs 12 are provided from the outer surface 11c of the diameter-expanded cylindrical portion 11 as in the first embodiment described above. Furthermore, a concave groove 19 that is concave from the surface 12 a of the rib 12 is provided. A plurality of concave grooves 19 are provided in each rib 12. For this reason, when attached to the panel 2, the contact area with the panel 2 is reduced. For this reason, when attaching to the panel 2, local compressive deformation occurs in the location where the rib 12 and the rib 12 of the enlarged diameter cylindrical portion 11 are provided, and it is easy to elastically deform in the direction in which the enlarged diameter cylindrical portion 11 is reduced in diameter. Become.

  Further, the concave groove 19 extends linearly along the diameter-expanded cylindrical portion 11, that is, the axis P of the grommet 1. The rib 12 extends along the axis P of the enlarged diameter cylindrical portion 11. For this reason, when press-fitting into the hole 3 of the panel 2 along the axis P of the diameter-expanded cylindrical portion 11, the surface 12a of the rib 12 can be prevented from being caught on the inner edge of the hole 3 of the panel 2, and the rib 12 Friction between the surface 12a and the inner edge of the hole 3 of the panel 2 can be reduced. Therefore, it can be easily attached to the panel 2 constituting the vehicle body.

  Further, according to the present embodiment, the depth D of the concave groove 19 is deeper than the protruding amount H of the rib 12. For this reason, when press-fitting into the hole 3 of the panel 2, local compressive deformation occurs in the bottom of the concave groove 19 of the diameter-expanded cylindrical portion 11 and in the vicinity of the bottom, and the diameter-expanded cylindrical portion 11 is reliably reduced in diameter. It becomes easy to elastically deform. For this reason, it can attach to the panel 2 which comprises a vehicle body much more easily.

  Next, a grommet according to a third embodiment of the present invention will be described with reference to FIGS. 15 and 16. In addition, the same code | symbol is attached | subjected to the same component as 1st and 2nd embodiment mentioned above, and description is abbreviate | omitted.

  In the grommet 1 of this embodiment, as shown in FIGS. 15 and 16, a large number of irregularities 20 are formed on the surface 12 a of the rib 12. The unevenness 20 forms the surface 12a of the rib 12 in a satin shape. The unevenness 20 is formed by subjecting the rib 12 formed flat to electrical discharge machining to the surface 12a, or applying a corrosive chemical to the surface 12a on the rib 12 formed flat.

  The grommet 1 of this embodiment is also press-fitted into the hole 3 of the panel 2 from the small-diameter cylindrical portion 10 side in the same manner as the first and second embodiments described above, and the diameter-expanding cylindrical portion 11 is once reduced in diameter. After the elastic deformation, the locking recess 13 is locked to the panel 2. Thus, the locking recess 13 is locked in the hole 3 of the panel 2, and the grommet 1 is attached to the panel 2.

  According to the present embodiment, a plurality of ribs 12 that are convex from the outer surface 11 c of the enlarged diameter cylindrical portion 11 are provided. Further, a large number of irregularities 20 are provided on the surface 12 a of the rib 12. For this reason, when attaching to a panel, only the front-end | tip of the unevenness | corrugation 20 of the rib 12 in the side away from the enlarged diameter cylinder part 11 contacts the panel 2. FIG. Thus, when attached to the panel 2, the contact area with the panel 2 is reduced, and the inner edge of the panel 2 is in point contact with the surface 12 a of the rib 12. For this reason, the friction between the surface 12a of the rib 12 and the inner edge of the hole 3 of the panel 2 can be reduced, and the insertion into the hole 3 of the panel 2 can be easily performed. Therefore, it can be easily attached to the panel 2 constituting the vehicle body.

  In the embodiment described above, each of the ribs 12 is provided with a plurality of concave grooves 19. However, in the present invention, only one concave groove 19 may be provided in each rib 12.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

It is a perspective view which shows the grommet concerning the 1st Embodiment of this invention, and the panel to which this grommet is attached. It is a top view of the grommet shown in FIG. It is a side view of the grommet shown in FIG. It is sectional drawing which follows the IV-IV line | wire in FIG. It is sectional drawing which expands and shows the V section in FIG. It is sectional drawing which follows the VI-VI line in FIG. It is sectional drawing which shows the state by which the grommet shown by FIG. 1 was attached to the panel. It is sectional drawing which expands and shows the VIII part in FIG. It is a perspective view which shows the grommet concerning the 2nd Embodiment of this invention, and the panel to which this grommet is attached. FIG. 10 is a plan view of the grommet shown in FIG. 9. FIG. 10 is a side view of the grommet shown in FIG. 9. It is sectional drawing which follows the XII-XII line | wire in FIG. It is sectional drawing which expands and shows the XIII part in FIG. It is sectional drawing which follows the XIV-XIV line | wire in FIG. It is a perspective view which shows the grommet concerning the 3rd Embodiment of this invention. It is sectional drawing which expands and shows the XVI part in FIG. It is sectional drawing of the conventional grommet. It is sectional drawing which expands and shows the XVIII part in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Grommet 2 Panel 3 Hole 5 Wire harness 11 Diameter expansion cylinder part 11a One end part (end part by the side of a small diameter)
11b The other end (end on the large diameter side)
11c outer surface 12 rib 12a surface 13 locking recess 14 first wall 15 second wall 19 recessed groove 20 unevenness P shaft core D depth H protrusion amount

Claims (6)

An inner diameter and an outer diameter gradually increase from the end on the small diameter side toward the end on the large diameter side, and the diameter increasing cylindrical portion that is formed in a cylindrical shape and passes the wire harness inside,
A locking recess provided at an end portion on the large-diameter side of the enlarged-diameter cylindrical portion, and inserting the enlarged-diameter cylinder portion into a hole in the panel from the end portion on the small-diameter side, In the grommet that locks in the hole,
A plurality of ribs protruding from the outer surface of the diameter-enlarging cylindrical portion;
A concave groove that is concave from the surface of the plurality of ribs and extends linearly along the axial center of the enlarged-diameter cylindrical portion;
Grommet characterized by comprising.   2. The grommet according to claim 1, wherein the ribs are spaced in the circumferential direction of the enlarged diameter cylindrical portion and extend linearly along the axial center of the enlarged diameter cylindrical portion.   The grommet according to claim 1, wherein a plurality of the concave grooves are provided in each rib.   The depth from the surface of the rib of the concave groove to the bottom is shallower than the protruding amount of the rib from the outer surface of the enlarged diameter cylindrical portion. The grommet described.   The depth from the surface of the rib of the concave groove to the bottom is deeper than the protruding amount of the rib from the outer surface of the enlarged diameter cylindrical portion. The grommet described. An inner diameter and an outer diameter gradually increase from the end on the small diameter side toward the end on the large diameter side, and the diameter increasing cylindrical portion that is formed in a cylindrical shape and passes the wire harness inside,
A locking recess provided at an end portion on the large-diameter side of the enlarged-diameter cylindrical portion, and inserting the enlarged-diameter cylinder portion into a hole in the panel from the end portion on the small-diameter side, In the grommet that locks in the hole,
Provided with a plurality of ribs protruding from the outer surface of the diameter-expanded cylindrical portion,
A grommet in which a large number of irregularities are formed on the surfaces of the plurality of ribs.

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