JP2005229711A - Grommet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grommet which can be attached easily to a panel. <P>SOLUTION: The grommet 1 is attached into the hole 3 of the panel 2. The grommet 1 is equipped with a tapered barrel 11. The other end 11b of the large diameter side of the tapered barrel 11 is provided with a locking recess 13. The locking recess 13 locks in the hole 3 of the panel 2. The tapered barrel 11 is equipped with an inner barrel 20 and an outer barrel 21 and a plurality of ribs 12. The inner barrel 20 and the outer barrel 21 are arranged coaxially, and space C is made between them. For the rib 12, its one end 12a leads to the inner barrel 20 and its other end 12b leads to the outer barrel 21. For the rib 12, a segment, which is made by connecting its one end 12a with its other end 12b, crosses the diametrical direction of the tapered barrel 11. For the rib 12, the midsection 12c is curved to be convex in the circumferential direction of the tapered barrel 11 from both ends 12a and 12b. <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, the enlarged diameter cylindrical portions are arranged coaxially with each other and spaced apart from each other along the radial direction. An inner cylinder part, an outer cylinder part, and a rib continuous to both the inner cylinder part and the outer cylinder part, wherein the rib is arranged in a cross section intersecting with the axis of the enlarged cylinder part. A line segment formed by connecting one end connected to the outer portion and the other end connected to the outer cylindrical portion is formed at the one end. It is characterized by intersecting with respect to the radial direction of the cylindrical portion.

  A grommet according to a second aspect of the present invention is the grommet according to the first aspect, wherein the rib extends along the axis of the diameter-enlarging cylindrical portion.

  The grommet according to a third aspect of the present invention is the grommet according to the first or second aspect, wherein the rib is the diameter expansion of a space formed between the inner cylindrical portion and the outer cylindrical portion. It is characterized by being connected to both the inner cylinder part and the outer cylinder part over the entire length along the axis of the cylinder part.

  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 a plurality of the ribs are provided along a circumferential direction of the diameter-expanded cylindrical portion. It is characterized by being evenly spaced.

  The grommet according to a fifth aspect of the present invention is the grommet according to the fourth aspect, wherein the rib has both the one end and the other end in a cross section intersecting the axis of the diameter-enlarging cylindrical portion. Furthermore, the center part between these is characterized by curving convexly along the circumferential direction of the said enlarged diameter cylinder part.

  The grommet according to a sixth aspect of the present invention is the grommet according to the fifth aspect, characterized in that a concave groove is provided in the central portion of the rib from the surface of the rib.

  According to the grommet of the present invention as set forth in claim 1, the enlarged diameter cylindrical portion includes the inner cylindrical portion, the outer cylindrical portion, and the ribs connected to these. For this reason, a space is formed between the inner cylinder part and the outer cylinder part. In addition, a line segment formed by connecting one end portion connected to the inner cylindrical portion of the rib and the other end portion connected to the outer cylindrical portion intersects the radial direction of the enlarged diameter cylindrical portion.

  For this reason, when the enlarged cylindrical portion is press-fitted into the hole of the panel, when the outer cylindrical portion is pressed from the inner edge of the hole of the panel, the ribs are arranged along the circumferential direction around the axial center of the enlarged cylindrical portion. Press the part. And while an inner side cylinder part rotates around the axial center of an enlarged diameter cylinder part, an enlarged diameter cylinder part elastically deforms so that the space between an inner side cylinder part and an outer side cylinder part may be crushed. As described above, the ribs rotate the inner cylinder part around the axis of the enlarged cylinder part, so that the enlarged cylinder part is elastically deformed in a direction in which the inner and outer diameters are easily reduced.

  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, the enlarged cylindrical portion is press-fitted into the hole of the panel so that the outer cylindrical portion is When pressed from the inner edge of the hole in the panel, the inner cylinder portion reliably rotates around the axis of the enlarged diameter cylinder portion.

  According to the grommet of the present invention described in claim 3, since the rib is formed over the entire length of the space between the inner cylinder part and the outer cylinder part, the enlarged diameter cylinder part is press-fitted into the hole of the panel. Then, when the outer cylinder part is pressed from the inner edge of the hole of the panel, the inner cylinder part is pressed along the circumferential direction around the axial center of the enlarged diameter cylinder part over the entire length of the rib. And an inner side cylinder part rotates more reliably by the surroundings of the axial center of an enlarged diameter cylinder part.

  According to the grommet of the present invention as set forth in claim 4, the plurality of ribs are arranged at equal intervals along the circumferential direction of the diameter-expanded cylindrical portion. For this reason, the inner cylinder part and the outer cylinder part can be kept coaxial even when the enlarged diameter cylinder part is press-fitted into the hole of the panel and attached to the panel. Further, when the enlarged diameter cylindrical portion is press-fitted into the hole of the panel and the outer cylindrical portion is pressed from the inner edge of the hole of the panel, the inner cylindrical portion is along the circumferential direction centering on the axis of the enlarged diameter cylindrical portion. Pressed. At this time, the inner cylindrical portion is uniformly pressed from the rib in the circumferential direction. And an inner side cylinder part rotates more reliably around the axial center of an enlarged diameter cylinder part.

  According to the grommet of the present invention as set forth in claim 5, the plurality of ribs are curved in a convex manner in the circumferential direction of the diameter-expanded cylindrical portion. When the enlarged tube portion is press-fitted into the hole of the panel and the outer tube portion is pressed from the inner edge of the hole of the panel, the rib moves the inner tube portion along the circumferential direction around the axis of the enlarged tube portion. It can be pressed reliably. And an inner side cylinder part rotates more reliably around the axial center of an enlarged diameter cylinder part.

  According to the grommet of the present invention described in claim 6, the groove is formed in the central portion of the rib. For this reason, when the outer diameter cylindrical portion is press-fitted into the hole of the panel and the outer cylindrical portion is pressed from the inner edge of the hole of the panel, the rib is circumferentially centered on the inner cylindrical portion about the axis of the larger diameter cylindrical portion. And the rib itself is bent by the groove.

  As described above, according to the first aspect of the present invention, when the enlarged cylindrical portion is press-fitted into the hole of the panel and attached to the panel, the inner cylindrical portion is around the axis of the enlarged cylindrical portion by the rib. Therefore, the diameter-expanding cylindrical portion is easily elastically deformed in the direction in which the inner and outer diameters are reduced. That is, the diameter-enlarged cylinder portion is easily elastically deformed in the direction in which the inner and outer diameters are reduced. Therefore, it can be easily attached to the panel constituting the vehicle body.

  In the second aspect of the present invention, since the rib extends along the axial center of the enlarged diameter cylindrical portion, when the enlarged diameter cylindrical portion is press-fitted into the hole of the panel, the inner cylindrical portion becomes the enlarged diameter cylindrical portion. It rotates reliably around the axis. For this reason, when the diameter-enlarged cylinder part is press-fitted into the hole of the panel and attached to the panel, the diameter-enlarged cylinder part is elastically deformed in a direction in which the inner and outer diameters are more easily reduced. Therefore, it can be attached to the panel constituting the vehicle body more easily.

  In the third aspect of the present invention, since the rib is formed over the entire length of the space between the inner cylinder portion and the outer cylinder portion, the enlarged diameter cylinder portion is press-fitted into the hole of the panel, The inner cylinder part is pressed along the circumferential direction centering on the axial center of an enlarged diameter cylinder part over the full length. For this reason, when the enlarged diameter cylindrical portion is press-fitted into the hole of the panel and attached to the panel, the inner cylindrical portion rotates more reliably around the axis of the enlarged diameter cylindrical portion, and the inner and outer diameters are more easily reduced. The expanded diameter cylindrical portion is elastically deformed. Therefore, it can be attached to the panel constituting the vehicle body more easily.

  According to the grommet of the present invention as set forth in claim 4, the plurality of ribs are arranged at equal intervals along the circumferential direction of the diameter-expanded cylindrical portion. When the diameter-enlarged cylinder part is press-fitted into the hole of the panel and attached to the panel, the inner cylinder part is uniformly pressed in the circumferential direction from the rib along the circumferential direction around the axial center of the diameter-enlarged cylinder part. For this reason, when the enlarged diameter cylindrical portion is press-fitted into the hole of the panel and attached to the panel, the inner cylindrical portion rotates more reliably around the axis of the enlarged diameter cylindrical portion, and the inner and outer diameters are more easily reduced. The expanded diameter cylindrical portion is elastically deformed. Therefore, it can be attached to the panel constituting the vehicle body more easily.

  According to the grommet of the present invention as set forth in claim 5, the plurality of ribs are curved in a convex manner in the circumferential direction of the diameter-expanded cylindrical portion. When the enlarged diameter cylindrical portion is press-fitted into the hole of the panel and attached to the panel, the rib can surely press the inner cylindrical portion along the circumferential direction around the axis of the enlarged diameter cylindrical portion. Further, since the plurality of ribs are convexly curved in the circumferential direction of the enlarged diameter cylindrical portion, the ribs are easily bent. For this reason, when the diameter-enlarged cylinder part is press-fitted into the hole of the panel and attached to the panel, the diameter-enlarged cylinder part is elastically deformed in a direction in which the inner and outer diameters are more easily reduced. Therefore, it can be more easily attached to the panel constituting the vehicle body.

  According to the grommet of the present invention described in claim 6, since the groove is formed in the central portion of the rib, the enlarged diameter cylindrical portion is press-fitted into the hole of the panel, and the outer cylindrical portion extends from the inner edge of the hole of the panel. When pressed, the rib itself bends in the groove. For this reason, when the diameter-enlarged cylinder part is press-fitted into the hole of the panel and attached to the panel, the diameter-enlarged cylinder part is elastically deformed in a direction in which the inner and outer diameters are more easily reduced. Therefore, it can be more 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 10) according to a first embodiment of the present invention is provided on a panel 2 (shown in FIGS. 1 and 5 to 10) constituting 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. 5) 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 and an enlarged-diameter cylindrical portion 11. 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. 5) 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. 3 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. 3 and 5, the locking recess 13 is formed along the first wall 14 near the other end 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 groove bottom surface over the entire circumference.

  The above-described locking recess 13 is inserted into the hole 3 of the panel 2 from the one end portion 11a (that is, the small-diameter cylindrical portion 10) along the arrow K (shown in FIG. 1 and the like) of the enlarged diameter cylindrical portion 11 or the grommet 1. Then, the second wall 15 is once bent toward 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, and 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. 5 and 6, 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. 5 and 6, 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. 1, 3 to 5, the above-described enlarged diameter cylindrical portion 11 includes an inner cylindrical portion 20, an outer cylindrical portion 21, an inner cylindrical portion 20, and an outer cylindrical portion 21 that are arranged coaxially with each other. And a plurality of ribs 12 connected to both of them. The inner cylinder part 20 is even formed in a circular tube having an inner and outer diameter that is constant along the axis P. The outer cylinder portion 21 has an inner diameter larger than the outer diameter of the inner cylinder portion 20, and is formed in a tubular shape whose inner and outer diameters gradually increase from the one end portion 12a to the other end portion 12b. Further, since the outer cylindrical portion 21 and the inner cylindrical portion 20 are arranged coaxially, the inner cylindrical portion 20 is accommodated in the outer cylindrical portion 21.

  Furthermore, since the inner diameter of the outer cylinder part 21 is larger than the outer diameter of the inner cylinder part 20, the outer cylinder part 21 and the inner cylinder part 20 are arranged at a distance from each other along the radial direction of the enlarged cylinder part 11. ing. Furthermore, a space C is formed between the inner cylinder part 20 and the outer cylinder part 21. The space C extends linearly along the axis P in the cross section along the axis P of the diameter-enlarged cylinder part 11 and is formed over the entire circumference of the diameter-enlarged cylinder part 11. Yes. Further, the above-described space C is open on the surface of the first wall 14 and is not open on the surface of the second wall 15, that is, the outer cylindrical portion 21.

  As shown in FIGS. 1 and 4, the ribs 12 are arranged in the space C described above, and are arranged at equal intervals along the circumferential direction around the axis P of the diameter-enlarged cylindrical portion 11 ( Are spaced apart from each other). The rib 12 is formed in a plate shape in which one end portion 12 a is continuous with the inner cylindrical portion 20 and the other end portion 12 b is continuous with the outer cylindrical portion 21. The rib 12 extends linearly along the axis P of the diameter-enlarging cylindrical portion 11 in the space C described above. The rib 12 has one end 12 a continuous with the inner cylinder 20 and the other end 12 b with the outer cylinder 21 over the entire length along the axis P of the diameter-enlarged cylinder 11 of the space C described above. . That is, the rib 12 is connected to both the inner cylinder part 20 and the outer cylinder part 21 over the entire length along the axis P of the space C.

  Further, the rib 12 has a point that bisects the thickness of the one end 12a and the thickness of the other end 12b in the cross section perpendicular to (crosses) the axis P of the diameter-enlarged cylinder portion 11. As shown in FIG. 4, a line segment S <b> 1 formed by connecting B is formed. It is inclined with respect to the radial direction of the enlarged diameter cylindrical portion 11 so as to intersect a line segment S2 formed by connecting the point A and the axis P. The above-described line segment S1 forms a line segment formed by connecting the one end portion 12a connected to the inner cylindrical portion 20 and the other end portion 12b connected to the outer cylindrical portion 21 described in this specification. Further, the above-described line segment S2 forms the radial direction of the enlarged diameter cylindrical portion 11 at the one end portion 12a. For this reason, as for the rib 12, the line segment S1 mentioned above cross | intersects with respect to the radial direction of the diameter expansion cylindrical part 11 in the said one end part 12a.

  Further, the plurality of ribs 12 are inclined in the same direction with respect to the radial direction of the diameter-enlarged cylinder portion 11 so that the angles formed by the line segment S1 and the line segment S2 are the same angle. Further, the rib 12 has a central portion 12c between the one end portion 12a and the other end portion 12b from both the one end portion 12a and the other end portion 12b in a cross section orthogonal to (crossing) the axis P. However, it is convexly curved along the circumferential direction of the diameter-expanded cylindrical portion 11. Further, the plurality of ribs 12 are curved so that the above-described central portion 12c protrudes in the same direction along the circumferential direction of the enlarged diameter cylindrical portion 11 from both end portions 12a and 12b (projects in the same direction). doing. For this reason, the rib 12 is formed in a trajectory drawn by a fixed point of a circle rolling on the outside of the inner cylindrical portion 20, that is, in an outer cycloid shape, in a cross section orthogonal to (crossing) the axis P described above.

  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 as shown in FIG. Then, as shown in FIG. 8, the outer surface 11 c of the enlarged diameter cylindrical portion 11 comes into contact with the inner edge of the hole 3 of the panel 2.

  Further, 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 diameter-expanded cylindrical portion 11 is made to be expanded by the inner surface of the hole 3 and the ring portion 4. It is pressed toward the inside. Then, of course, the other end portion 12 b of the rib 12 is pressed toward the inside of the enlarged diameter cylindrical portion 11. Then, the one end portion 12 a of the rib 12 is pressed toward the inside of the enlarged diameter cylindrical portion 11 along the longitudinal direction of the rib 12 in a cross section orthogonal to (crossing) the axis P of the rib 12.

  Then, the ribs 12 are curved in the same direction as described above and are inclined in the same direction as described above with respect to the radial direction of the diameter-enlarged cylindrical portion 11, so that the ribs 12 surround the inner cylindrical portion 20 around the axis P. Is pressed along the arrow R (shown in FIG. 4). For this reason, the inner cylinder part 20 rotates around the axis P along the arrow R (shown in FIG. 4). Of course, the inner diameter of the hole 3 and the ring part 4 presses the enlarged diameter cylinder part 11 toward the inner side of the enlarged diameter cylinder part 11, so that the outer cylinder part 21 is pressed inward, and the space C described above is formed. The diameter-expanded cylindrical portion 11 is elastically deformed so as to be crushed. Thus, as shown in FIG. 9, 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 FIG. 10, 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, the diameter-enlarging cylinder part 11 includes the inner cylinder part 20, the outer cylinder part 21, and the ribs 12 connected to these. For this reason, a space C is formed between the inner cylinder part 20 and the outer cylinder part 21. Further, a line segment S <b> 1 formed by connecting one end portion 12 a continuous with the inner cylindrical portion 20 of the rib 12 and the other end portion 12 b continuous with the outer cylindrical portion 21 intersects the radial direction of the enlarged diameter cylindrical portion 11. .

  For this reason, when the enlarged cylindrical portion 11 is press-fitted into the hole 3 of the panel 2 and the outer cylindrical portion 21 is pressed from the inner edge of the hole 3 of the panel 2, the rib 12 causes the inner cylindrical portion 20 to be expanded. It presses along the circumferential direction centering on the axial center P of this. And while the inner side cylinder part 20 rotates around the axial center P of the enlarged diameter cylinder part 11, the enlarged diameter cylinder part 11 elastically deforms so that the space C between the inner side cylinder part 20 and the outer side cylinder part 21 may be crushed. . As described above, the inner cylinder portion 20 is rotated around the axis P of the diameter-enlarged cylinder portion 11 by the ribs 12, so that the diameter-enlarged cylinder portion 11 is easily elastically deformed in a direction in which the inner and outer diameters are reduced. That is, the diameter-enlarged cylinder portion 11 is easily elastically deformed in a direction in which the inner and outer diameters are 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, the enlarged diameter cylindrical portion 11 is press-fitted into the hole 3 of the panel 2, and the outer cylindrical portion 21 becomes the hole 3 of the panel 2. When the inner cylinder part 20 is pressed from the inner edge, the inner cylinder part 20 is reliably rotated around the axis P of the enlarged diameter cylinder part 11. Therefore, it can be attached to the panel 2 constituting the vehicle body more easily.

  Since the rib 12 is formed over the entire length of the space C between the inner cylinder part 20 and the outer cylinder part 21, the enlarged cylinder part 11 is press-fitted into the hole 3 of the panel 2, and the outer cylinder part 21 is When pressed from the inner edge of the hole 3 of the panel 2, the inner cylindrical portion 20 is pressed along the circumferential direction around the axial center P of the enlarged diameter cylindrical portion 11 over the entire length of the rib 12. And the inner side cylinder part 20 rotates more reliably by the surroundings of the axial center P of the enlarged diameter cylinder part 11. FIG. Therefore, it can be attached to the panel 2 constituting the vehicle body more easily.

  Further, a plurality of ribs 12 are arranged at equal intervals along the circumferential direction of the diameter-enlarged cylindrical portion 11. For this reason, the inner cylinder part 20 and the outer cylinder part 21 can be kept coaxial even when the diameter-enlarged cylinder part 11 is press-fitted into the hole 3 of the panel 2 and attached to the panel 2. Further, when the enlarged cylindrical portion 11 is press-fitted into the hole 3 of the panel 2 and the outer cylindrical portion 21 is pressed from the inner edge of the hole 3 of the panel 2, the inner cylindrical portion 20 becomes the axis P of the enlarged cylindrical portion 11. It is pressed along the circumferential direction centering on. At this time, the inner cylinder part 20 is pressed from the rib 12 equally in the circumferential direction. And the inner side cylinder part 20 rotates more reliably by the surroundings of the axial center P of the enlarged diameter cylinder part 11. FIG. Therefore, it can be attached to the panel constituting the vehicle body more easily.

  Further, the plurality of ribs 12 are convexly curved in the circumferential direction of the diameter-enlarged cylindrical portion 11. When the enlarged cylindrical portion 11 is press-fitted into the hole 3 of the panel 2 and the outer cylindrical portion 21 is pressed from the inner edge of the hole 3 of the panel 2, the rib 12 causes the inner cylindrical portion 20 to become the axis of the enlarged cylindrical portion 11. It is possible to reliably press along the circumferential direction centering on P. And the inner side cylinder part 20 rotates more reliably by the surroundings of the axial center P of the enlarged diameter cylinder part 11. FIG. Further, since it is convexly curved in the circumferential direction of the enlarged diameter cylindrical portion 11, the enlarged diameter cylindrical portion 11 is press-fitted into the hole 3 of the panel 2, and the outer cylindrical portion 21 is pressed from the inner edge of the hole 3 of the panel 2. Then, the rib 12 itself is easily bent. Therefore, it can attach to the panel 2 which comprises a vehicle body much more easily.

  Further, since the plurality of ribs 12 are inclined in the same direction with respect to the radial direction of the enlarged diameter cylindrical portion 11 and are curved in the same direction along the circumferential direction of the enlarged diameter cylindrical portion 11, the enlarged diameter cylindrical portion 11 is attached to the panel 2. When press-fitted into the hole 3, the plurality of ribs 12 press the inner cylindrical portion 20 around the axis P in the same direction. For this reason, the inner side cylinder part 20 rotates around the axial center P, and can be attached 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.

  The grommet 1 of this embodiment is attached to the panel 2 shown in FIG. 11 as in the first embodiment described above, and as shown in FIGS. 11 to 13, the small diameter cylindrical portion 10 and the enlarged diameter cylindrical portion 11 Is integrated. Further, the enlarged diameter cylindrical portion 11 of the grommet 1 of the present embodiment is similar to the first embodiment described above, as shown in FIGS. 13 and 14, the inner cylindrical portion 20, the outer cylindrical portion 21, and a plurality of ribs. 12.

  Also in the present embodiment, as in the first embodiment, the plurality of ribs 12 are inclined in the same direction so that the line segment S1 intersects the radial direction of the enlarged diameter cylindrical portion 11. The plurality of ribs 12 are curved in the same direction.

  Furthermore, in the present embodiment, as shown in FIGS. 14 and 15, a groove 22 that is concave from the surface of the rib 12 is formed in the central portion 12 c of the rib 12 in a cross section orthogonal to (crossing) the axis P. Has been. The groove 22 is formed in a V-shaped cross section, extends linearly along the axis P, and is provided over the entire length of the rib 12.

  Also in this embodiment, when the grommet 1 is press-fitted into the hole 3 of the panel 2 from the small-diameter cylindrical portion 10, that is, the one end portion 11 a, the outer cylindrical portion 21 is pressed toward the inner side of the enlarged-diameter cylindrical portion 11. However, the inner cylinder part 20 is pressed along the longitudinal direction. And the diameter expansion cylinder part 11 elastically deforms so that the inner side cylinder part 20 rotates around the axial center P, and the space C is crushed. Then, 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, in the same manner as in the first embodiment described above, the rib 12 is inclined and curved in the radial direction of the diameter-enlarged cylindrical portion 11 in a cross section orthogonal to (crossing) the axis P. ing. Further, the ribs 12 are arranged at equal intervals in the circumferential direction of the diameter-enlarging cylindrical portion 11. For this reason, when attaching to the panel 2 similarly to 1st Embodiment mentioned above, the inner side cylinder part 20 rotates around the axial center P along the arrow R, and the space C is crushed. For this reason, the diameter-expanded cylindrical portion 11 is easily elastically deformed in a direction in which the inner and outer diameters are reduced. Therefore, it can be easily attached to the panel 2 constituting the vehicle body.

  Further, since the groove 22 is formed in the central portion 12 c of the rib 12, the expanded cylindrical portion 11 is pressed into the hole 3 of the panel 2, and the outer cylindrical portion 21 is pressed from the inner edge of the hole 3 of the panel 2. Then, the rib 12 can surely press the inner cylindrical portion 20 along the circumferential direction around the axis P of the enlarged diameter cylindrical portion 11, and the rib 12 itself is bent by the groove 22. For this reason, when the diameter-enlarged cylinder part 11 is press-fitted into the hole 3 of the panel 2 and attached to the panel 2, the diameter-enlarged cylinder part 11 is more easily elastically deformed in the direction in which the inner and outer diameters are reduced. Therefore, it can attach to the panel 2 which comprises a vehicle body much more easily.

  In the first and second embodiments described above, the rib 12 is curved as described above. However, in the invention, if the line segment S1 is inclined in the same direction with respect to the radial direction, the plurality of ribs 12 are linear in a cross section orthogonal to (crossing) the axis P as shown in FIG. It may be formed.

  Further, in the present invention, the rib 12 does not have to extend linearly along the axis P, and does not have to be provided over the entire length of the space C.

  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 side view of the grommet shown in FIG. It is sectional drawing which follows the III-III line | wire in FIG. It is sectional drawing which follows the IV-IV line | wire 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 VI section in FIG. It is sectional drawing which expands and shows the principal part of the state by which the grommet shown by FIG. 1 was inserted in the hole of the panel. It is sectional drawing which expands and shows the principal part of the state which the inner edge of the hole of the panel contacted the outer surface of the diameter expansion cylinder part of the grommet shown by FIG. It is sectional drawing which expands and shows the principal part of the state where the grommet shown by FIG. 8 was further inserted in the hole of a panel, and the space was crushed. It is sectional drawing which expands and shows the principal part of the state which the latching recessed part of the grommet shown by FIG. 9 latched to the hole of the panel. 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. It is a side view of the grommet shown in FIG. It is sectional drawing which follows the XIII-XIII line | wire in FIG. It is sectional drawing which follows the XIV-XIV line | wire in FIG. It is sectional drawing which expands and shows the XV part in FIG. It is a partial sectional view of a modification of the grommet of the present invention. It is sectional drawing of the conventional grommet. It is sectional drawing which expands and shows the XX 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)
12 Rib 12a One end 12b Other end 12c Center 13 Locking recess 20 Inner tube 21 Outer tube 22 Groove P Axis S1 Line S2 Line (radial direction)
C space

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,
The diameter-enlarging cylinder part is connected to both the inner cylinder part, the outer cylinder part, the inner cylinder part, and the outer cylinder part that are arranged coaxially with each other and spaced apart from each other in the radial direction. With ribs,
The rib has a line segment formed by connecting one end connected to the inner cylinder and the other end connected to the outer cylinder in a cross section intersecting the axis of the enlarged diameter cylinder. Grommet characterized in that it intersects the radial direction of the diameter-expanded cylindrical part.   The grommet according to claim 1, wherein the rib extends along an axis of the diameter-expanded cylindrical portion.   The rib is formed on both the inner and outer cylindrical portions over the entire length along the axis of the enlarged cylindrical portion of the space formed between the inner and outer cylindrical portions. The grommet according to claim 1, wherein the grommet is continuous.   The grommet according to any one of claims 1 to 3, wherein a plurality of the ribs are provided, and are arranged at equal intervals along a circumferential direction of the diameter-expanding cylindrical portion.   In the cross section intersecting the axial center of the enlarged diameter cylindrical portion, the rib has a central portion between the one end portion and the other end portion that protrudes along the circumferential direction of the enlarged diameter cylindrical portion. The grommet according to claim 4, wherein the grommet is curved.   The grommet according to claim 5, wherein a concave groove is provided in the central portion of the rib from the surface of the rib.

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