Grommet

Abstract

To provide a grommet which can minimize changes in a grommet design according to an apparatus design.SOLUTION: A direction in which a wiring harness W passes inside a grommet 10 is defined as an insertion direction D. The grommet 10 comprises: a first member 11 having a seal part 36 which comes into contact with a vehicle body panel P; a second member 12 which is assembled to the first member 11 on one side in the insertion direction D, and which has a second cylinder part 43 for inserting the wiring harness W; and a third member 13 which is assembled to the first member 11 on the other side in the insertion direction D, and which has a third cylinder part 52 for inserting the wiring harness W.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to grommets. [Background technology]

[0002] Conventionally, as disclosed in, for example, Patent Document 1, there is a grommet that is attached to an assembly hole penetrating a vehicle body panel that separates the interior and exterior of the vehicle, and protects a wire harness that is inserted through the assembly hole. Such a grommet is made of an elastic material such as rubber, and is configured to be able to waterproof the space between the assembly hole of the vehicle body panel and the wire harness. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-131056 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the layout of the wire harness passing through the mounting hole and the shape of the mounting hole, such as the diameter, vary depending on the design of the device in which the grommet is mounted (vehicle design in the case of a grommet installed in a vehicle), so the design of the grommet often needs to be changed depending on the device design. Therefore, the present inventor has been studying how to minimize the number of design changes of the grommet depending on the device design.

[0005] An object of the present disclosure is to provide a grommet that enables design changes of the grommet to be kept to a minimum in accordance with device design. [Means for solving the problem]

[0006] The grommet of the present disclosure is a grommet that is assembled into an assembly hole of a panel through which a wire harness is passed, and includes, with the direction in which the wire harness passes being the insertion direction, a first member having a seal portion that contacts the panel, a second member assembled to the first member on one side of the insertion direction and having a tubular portion through which the wire harness is inserted, and a third member assembled to the first member on the other side of the insertion direction and having a tubular portion through which the wire harness is inserted. Effect of the Invention

[0007] According to the grommet of the present disclosure, it is possible to minimize design changes to the grommet in accordance with device design. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a cross-sectional view of a grommet according to an embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of the grommet of the same configuration. [Diagram 3] FIG. 3 is an enlarged cross-sectional view partially showing the grommet of the same embodiment. [Figure 4] FIG. 4 is a cross-sectional view showing the function of the grommet of the same configuration. [Diagram 5] FIG. 5 is an enlarged cross-sectional view partially showing a modified grommet. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] [Description of the embodiments of the present disclosure] First, the embodiments of the present disclosure will be listed and described. The grommet of the present disclosure comprises: [1] A grommet to be assembled into an assembly hole of a panel through which a wire harness is passed, the grommet comprising: a first member having a seal portion that contacts the panel, the direction in which the wire harness passes being an insertion direction; a second member assembled to the first member on one side of the insertion direction and having a tubular portion through which the wire harness is inserted; and a third member assembled to the first member on the other side of the insertion direction and having a tubular portion through which the wire harness is inserted.

[0010] According to this configuration, since the grommet is composed of at least three components, when the design of the grommet is changed according to the design of the device in which the grommet is mounted, at least one of the three components can be shared without design change. For example, when there is a change in the layout of the portion of the wire harness that is led out to the second component side, it can be accommodated by changing the design of only the second component. In this way, it is possible to minimize design changes of the grommet according to the device design.

[0011] [2] The first member and the second member form a first sound-proofing space therebetween, and the first member and the third member form a second sound-proofing space therebetween. According to this configuration, it is possible to improve the sound insulation performance by the first sound insulation space and the second sound insulation space.

[0012] [3] The tubular portion of the second member is referred to as the second tubular portion, and the tubular portion of the third member is referred to as the third tubular portion, wherein the first member has a base portion having the seal portion, a first tubular portion through which the wire harness is inserted, and a first connecting portion connecting the first tubular portion and the base portion, the second member has a first fixing portion fixed to the base portion and a second connecting portion connecting the first fixing portion and the second tubular portion, and the third member has a second fixing portion fixed to the base portion and a third connecting portion connecting the second fixing portion and the third tubular portion.

[0013] According to this configuration, by fixing the first fixing portion of the second member and the second fixing portion of the third member to the base portion of the first member, it is possible to form a grommet using three members.

[0014] [4] The first connecting portion, the second connecting portion and the third connecting portion are arranged at intervals from each other in the insertion direction, the first connecting portion is located between the second connecting portion and the third connecting portion, the first soundproof space is formed between the first connecting portion and the second connecting portion, and the second soundproof space is formed between the first connecting portion and the third connecting portion.

[0015] According to this configuration, a first sound insulating space and a second sound insulating space that are isolated from each other by the first connecting portion are formed inside the grommet. The first sound insulating space and the second sound insulating space can improve sound insulation. Furthermore, according to this configuration, the first sound insulating space and the second sound insulating space are arranged side by side in the insertion direction of the wire harness. This makes it possible to gradually insulate the transmitted sound that travels through the assembly hole between the indoor side and the outdoor side partitioned by the panel by the first sound insulating space and the second sound insulating space of the grommet.

[0016] [5] At least one of the first connecting portion, the second connecting portion, and the third connecting portion has a flexible portion that can bend to absorb an inclination of the wire harness relative to the panel.

[0017] According to this configuration, when the inclination angle of the wire harness passing through the assembly hole is changed, the inclination of the wire harness can be absorbed by the bending of the flexible portion. That is, even if each tubular portion is inclined following the inclination of the wire harness, the bending of the flexible portion can suppress the deformation of the base portion including the seal portion. As a result, the flexible portion can suppress the influence of the inclination of the wire harness on the sealing performance of the seal portion.

[0018] [6] The second member has a covering portion configured to be able to cover an insertion hole of a sound-proofing member provided on one side of the panel. According to this configuration, it is possible to improve sound insulation by the covering portion of the second member that covers the insertion hole of the sound insulation member.

[0019] [Details of the embodiment of the present disclosure] Specific examples of grommets according to the present disclosure will be described below with reference to the drawings. In each drawing, for the sake of convenience, some of the configuration may be exaggerated or simplified. Furthermore, the dimensional ratios of each part may differ between drawings. Furthermore, in this specification, "vertical" does not only mean strictly vertical, but also includes approximately vertical within the range in which the action and effect of this embodiment can be achieved.

[0020] In addition, the term "cylindrical" as used in the description of this specification includes not only those having a continuous peripheral wall formed around the entire circumference, but also those having a cylindrical shape formed by combining multiple parts, and those having a notch in a part of the circumference, such as a C-shape. In addition, the shape of the "cylindrical" includes a circle, an ellipse, and a polygon with sharp or rounded corners. In addition, the term "annular" as used in the description of this specification may refer to any structure that forms a loop, or a continuous shape without an end, as well as a generally loop-shaped structure with a gap, such as a C-shape. In addition, the shape of the "annular" includes, but is not limited to, a circle, an ellipse, and a polygon with sharp or rounded corners.

[0021] In addition, "facing" in this specification refers to surfaces or members facing each other, and includes not only cases where they are completely facing each other, but also cases where they are partially facing each other. In addition, "facing" in this specification includes both cases where a member other than the two parts is interposed between the two parts, and cases where nothing is interposed between the two parts.

[0022] As shown in FIG. 1, the grommet 10 of this embodiment is attached to an installation hole Pa formed in a body panel P of a vehicle. The grommet 10 ensures watertightness in the installation hole Pa of the body panel P. The grommet 10 also serves to prevent the wire harness W from interfering with the periphery of the installation hole Pa. The wire harness W includes at least one electric wire. The wire harness W is inserted into the inside of the grommet 10 along an insertion direction D. The axis L direction of the grommet 10 coincides with, for example, the insertion direction D in which the wire harness W is inserted into the grommet 10. In the following description, the direction along the axis L of the grommet 10 may be simply referred to as the "axial direction". The circumferential direction centered on the axis L and the radial direction centered on the axis L may be simply referred to as the "circumferential direction" and the "radial direction", respectively.

[0023] The vehicle body panel P is, for example, a panel that separates the interior and exterior of a vehicle. The exterior of the vehicle is, for example, an engine room. Of both sides of the vehicle body panel P, the side facing the interior of the vehicle is defined as a first side P1, and the side facing the exterior of the vehicle is defined as a second side P2. The mounting hole Pa of the vehicle body panel P is formed with a protruding portion Pb that protrudes, for example, from the periphery of the mounting hole Pa toward the first side P1. The protruding portion Pb is formed by bending the periphery of the mounting hole Pa toward the first side P1. The protruding portion Pb is formed, for example, by burring. The protruding portion Pb is formed around the entire circumference of the mounting hole Pa. The grommet 10 is, for example, assembled into the mounting hole Pa from the second side P2.

[0024] A sound-insulating member B is attached to a first surface P1 of the vehicle body panel P. Examples of materials used for the sound-insulating member B include nonwoven fabric, rubber sheet, and foam material. An insertion hole Ba through which the wire harness W is inserted is formed at a position corresponding to the mounting hole Pa in the sound-insulating member B.

[0025] (Overall configuration of Grommet 10) 1 and 2, the grommet 10 includes a first member 11, a second member 12, and a third member 13. The second member 12 and the third member 13 are each separate from the first member 11. The second member 12 is attached to one side of the first member 11 in the insertion direction D. The third member 13 is attached to the other side of the first member 11 in the insertion direction D.

[0026] (First member 11) The first member 11 has, for example, an inner part 21 and an outer part 31. The inner part 21 and the outer part 31 are separate parts formed of different types of materials. The outer part 31 is made of a highly flexible material. The outer part 31 can be made of an elastomer such as EPDM (specifically, ethylene propylene diene rubber). The inner part 21 is made of a material with higher rigidity than the outer part 31. That is, the inner part 21 is configured so as to be less likely to deform as a whole. The inner part 21 can be made of a synthetic resin material such as PP (specifically, polypropylene). The inner part 21 and the outer part 31 are, for example, injection molded products.

[0027] (Inner part 21) The inner portion 21 has a cylindrical base portion 22 that is inserted into the assembly hole Pa. The base portion 22 has an annular shape that follows the periphery of the assembly hole Pa. The base portion 22 also has an annular shape that is slightly smaller than the periphery of the assembly hole Pa. As shown in FIG. 2 , the base portion 22 is provided with a locking piece 23 that can be locked to the periphery of the assembly hole Pa. The locking piece 23 is locked to the periphery of the assembly hole Pa, whereby the grommet 10 is fixed to the vehicle body panel P.

[0028] The inner portion 21 has a flange 24 extending outward from the base portion 22. The flange 24 is provided, for example, at one axial end of the base portion 22. The flange 24 has an outer shape larger than the mounting hole Pa. When the grommet 10 is mounted to the vehicle body panel P, the flange 24 is located on the second surface P2 side of the vehicle body panel P. Note that hereinafter, the "state in which the grommet 10 is mounted to the vehicle body panel P" may be simply referred to as the "mounted state."

[0029] (Outer part 31) The outer part 31 integrally includes a first base part 32, a first tubular part 33 through which the wire harness W is inserted, and a first connecting part 34 connecting the first tubular part 33 and the first base part 32. The first tubular part 33 has, for example, a cross-sectional shape that is annular with the axis L of the grommet 10 as its center. The first tubular part 33 extends along the axis L of the grommet 10. The first tubular part 33 is a part of the outer part 31 that comes into close contact with the outer peripheral surface of the wire harness W. This ensures watertightness between the wire harness W and the first tubular part 33.

[0030] The first base portion 32 has an inner tubular portion 35 disposed inside the base portion 22 of the inner portion 21, and a seal portion 36 formed integrally with the inner tubular portion 35. The inner tubular portion 35 is tubular extending along the axis L of the grommet 10. The cross-sectional shape of the inner tubular portion 35 is, for example, an annular shape centered on the axis L of the grommet 10. The inner tubular portion 35 is in contact with the inner peripheral surface of the base portion 22 of the inner portion 21. The seal portion 36 is annular surrounding the periphery of the mounting hole Pa. The seal portion 36 is sandwiched and compressed between the flange portion 24 and the second surface P2 of the vehicle body panel P. In this way, the seal portion 36 elastically contacts the second surface P2, thereby exerting a water-stopping effect between the seal portion 36 and the second surface P2.

[0031] (Second member 12) As shown in Fig. 3, the second member 12 integrally includes a second base portion 41, a first fixing portion 42, a second tubular portion 43, a second connecting portion 44, and a covering portion 45. The second member 12 is made of a highly flexible material. The second member 12 may be made of an elastomer such as EPDM (specifically, ethylene propylene diene rubber). The second member 12 may be an injection molded product.

[0032] The second base portion 41 has a cylindrical shape extending along the axis L of the grommet 10. The cross-sectional shape of the second base portion 41 is, for example, annular about the axis L of the grommet 10. The second base portion 41 is disposed inside the inner cylindrical portion 35 of the first base portion 32. The inner peripheral surface of the second base portion 41 is in contact with, for example, the outer peripheral surface of the inner cylindrical portion 35 of the first base portion 32. The second base portion 41, together with the first base portion 32, constitutes the main body of the grommet 10 of this embodiment.

[0033] The first fixing portion 42 is a portion fixed to the first base portion 32. The first fixing portion 42 is, for example, a convex portion protruding from the outer circumferential surface of the second base portion 41. The first fixing portion 42 is fitted into a connecting recess 35a formed on the inner circumferential surface of the inner tubular portion 35.

[0034] The second tubular portion 43 has, for example, a cross-sectional shape that is annular about the axis L of the grommet 10. The second tubular portion 43 extends along the axis L of the grommet 10. The second tubular portion 43 is a portion of the second member 12 that comes into close contact with the outer peripheral surface of the wire harness W. This ensures watertightness between the wire harness W and the second tubular portion 43.

[0035] As shown in Fig. 1, the covering portion 45 extends radially outward from the outer circumferential surface of the second base portion 41. The covering portion 45 has, for example, a circular shape centered on the axis L. The covering portion 45 has, for example, a tapered shape that increases in diameter as it approaches the vehicle body panel P in the axial direction. When the grommet 10 is attached to the vehicle body panel P, the peripheral edge of the covering portion 45 elastically abuts against the sound insulation member B. As a result, the covering portion 45 covers the insertion hole Ba of the sound insulation member B.

[0036] (Third member 13) The third member 13 integrally includes a second fixing portion 51 fixed to the first base portion 32, a third tubular portion 52 through which the wire harness W is inserted, and a third connecting portion 53 connecting the second fixing portion 51 and the third tubular portion 52. The third member 13 is made of a material having high flexibility. As a constituent material of the third member 13, for example, an elastomer such as EPDM (specifically, ethylene propylene diene rubber) can be used. The third member 13 is, for example, an injection molded product. The elastic materials used for the outer portion 31 of the first member 11, the second member 12, and the third member 13 may be the same material or different materials, but it is preferable that all of them use elastic materials having flexibility.

[0037] The second fixing portion 51 is a portion fixed to the first base portion 32. The second fixing portion 51 is, for example, a convex portion protruding from the outer circumferential surface of the second base portion 41. The second fixing portion 51 is fitted into a connecting recess 35b formed on the inner circumferential surface of the inner tubular portion 35.

[0038] The third tubular portion 52 has, for example, a cross-sectional shape that is annular about the axis L of the grommet 10. The third tubular portion 52 extends along the axis L of the grommet 10. The third tubular portion 52 is, for example, a portion of the third member 13 that comes into close contact with the outer circumferential surface of the first tubular portion 33. This ensures watertightness between the first tubular portion 33 and the third tubular portion 52.

[0039] (1st to 3rd connecting parts 34, 44, 53) The first connecting portion 34 of the outer portion 31 connects the first base portion 32 and the first tubular portion 33, which constitute a part of the main body of the grommet 10. The second connecting portion 44 of the second member 12 connects the second base portion 41 and the second tubular portion 43, which constitute a part of the main body of the grommet 10. The third connecting portion 53 of the third member 13 connects the first base portion 32 and the third tubular portion 52. The first connecting portion 34, the second connecting portion 44, and the third connecting portion 53 are arranged at intervals from each other in the axial direction. The first connecting portion 34 is located between the second connecting portion 44 and the third connecting portion 53 in the axial direction.

[0040] (1st connecting part 34) As shown in FIG. 3, the first connecting portion 34 has a first flexible portion 61. The first flexible portion 61 is configured to be flexible so as to absorb the inclination of the wire harness W relative to the vehicle body panel P. The first flexible portion 61 has a bent portion 62 having a bent shape folded back so as to be convex in the axial direction. The bent portion 62 is bent, for example, so as to be convex toward the second connecting portion 44 side in the axial direction. In addition, the bent portion 62 is provided continuously over the entire circumference in the circumferential direction. The thickness of the bent portion 62 is formed thinner than the radial thickness of the first base portion 32. That is, the bent portion 62 in this embodiment is configured as a first thin portion. A radially inner end of the bent portion 62 is connected to one axial end of the first tubular portion 33.

[0041] (Second connection part 44) The second connecting portion 44 has a second flexible portion 71. The second flexible portion 71 is configured to be flexible so as to absorb the inclination of the wire harness W with respect to the vehicle body panel P.

[0042] The second flexible portion 71 has a bent portion 72 having a bent shape folded back so as to be convex in the axial direction. The bent portion 72 is bent, for example, so as to be convex toward the first connecting portion 34 in the axial direction. The bent portion 72 is provided continuously over the entire circumference in the circumferential direction. The thickness of the bent portion 72 is formed to be thinner than the radial thickness of the first base portion 32. That is, the bent portion 72 of this embodiment is configured as a first thin portion. The bent portion 72 is also configured to be thinner than the axial thickness of the covering portion 45 in some parts. That is, the bent portion 72 of this embodiment is also configured as a second thin portion.

[0043] The second flexible portion 71 also has a bellows portion 73. The bellows portion 73 is formed between a radially inner end of the bent portion 72 and one axial end of the first tubular portion 33. The bellows portion 73 is tubular and coaxial with the second tubular portion 43. The bellows portion 73 is set to have a larger diameter than the second tubular portion 43. The bellows portion 73 has, for example, a circular cross-sectional shape centered on the axis L of the grommet 10. The bellows portion 73 has a bellows structure in which annular convex portions and annular concave portions having an outer diameter smaller than that of the convex portions are alternately provided in the axial direction. The radial thickness of the bellows portion 73 is formed to be thinner than the wall thickness of the bent portion 72, for example.

[0044] (Third connection part 53) The third connecting portion 53 has a third flexible portion 81. The third flexible portion 81 is configured to be flexible so as to absorb the inclination of the wire harness W relative to the vehicle body panel P. The third flexible portion 81 has a bent portion 82 having a bent shape folded back so as to be convex in the axial direction. The bent portion 82 is bent, for example, so as to be convex toward the first connecting portion 34 side in the axial direction. In addition, the bent portion 82 is provided continuously over the entire circumference in the circumferential direction. The thickness of the bent portion 82 is formed thinner than the radial thickness of the first base portion 32. That is, the bent portion 82 in this embodiment is configured as a first thin portion. A radially inner end of the bent portion 82 is connected to one axial end of the third tubular portion 52.

[0045] The first connecting portion 34 and the second connecting portion 44 face each other with a gap in the axial direction of the grommet 10. The first connecting portion 34 and the second connecting portion 44 form a first sound insulation space S1 therebetween. The first connecting portion 34 and the third connecting portion 53 face each other with a gap in the axial direction of the grommet 10. The first connecting portion 34 and the third connecting portion 53 form a second sound insulation space S2 therebetween. That is, inside the grommet 10, the first sound insulation space S1 and the second sound insulation space S2 are formed, which are isolated from each other by the first connecting portion 34. The first sound insulation space S1 and the second sound insulation space S2 are arranged side by side in the insertion direction D of the wire harness W. The third tubular portion 52 of this embodiment is in close contact with the outer circumferential surface of the first tubular portion 33. As a result, the second soundproof space S2 is a space enclosed only by the outer portion 31 of the first member 11 and the third member 13.

[0046] The effects of this embodiment will be described. (1) The grommet 10 includes a first member 11, a second member 12, and a third member 13. The first member 11 has a seal portion 36 that contacts a vehicle body panel P. The second member 12 has a second tubular portion 43 through which the wire harness W is inserted, and is attached to one side of the first member 11 in the insertion direction D. The third member 13 has a third tubular portion 52 through which the wire harness W is inserted, and is attached to the other side of the insertion direction D with respect to the first member 11.

[0047] According to this configuration, since the grommet 10 is composed of at least three members, at least one of the first to third members 11, 12, and 13 can be shared without design change when the design of the grommet 10 is changed according to the vehicle design. For example, when the layout of the portion of the wire harness W that is led out to the second member 12 side is changed, it can be dealt with by changing the design of only the second member 12 among the first to third members 11, 12, and 13. Also, for example, when the diameter of the mounting hole Pa is changed in the vehicle body panel P, it can be dealt with by changing the radial thickness of the first member 11, and it is possible to do without changing the design of the second member 12 and the third member 13. In this way, it is possible to reduce the design change of the grommet 10 according to the vehicle design.

[0048] (2) The first member 11 and the second member 12 form a first sound insulating space S1 therebetween. The first member 11 and the third member 13 form a second sound insulating space S2 therebetween. With this configuration, the first sound insulating space S1 and the second sound insulating space S2 formed by the first to third members 11, 12, and 13 can improve the sound insulating properties of the grommet 10.

[0049] (3) The first member 11 has a first base portion 32 having a seal portion 36, a first tubular portion 33 through which the wire harness W is inserted, and a first connecting portion 34 connecting the first tubular portion 33 and the first base portion 32. The second member 12 has a first fixing portion 42 fixed to the first base portion 32, and a second connecting portion 44 connecting the first fixing portion 42 and the second tubular portion 43. The third member 13 has a second fixing portion 51 fixed to the first base portion 32, and a third connecting portion 53 connecting the second fixing portion 51 and the third tubular portion 52. According to this configuration, the first fixing portion 42 of the second member 12 and the second fixing portion 51 of the third member 13 are fixed to the first base portion 32 of the first member 11, respectively, so that the grommet 10 can be formed by the first to third members 11, 12, and 13.

[0050] (4) The first connecting portion 34, the second connecting portion 44, and the third connecting portion 53 are disposed at intervals from one another in the insertion direction D. The first connecting portion 34 is located between the second connecting portion 44 and the third connecting portion 53. The first soundproof space S1 is formed between the first connecting portion 34 and the second connecting portion 44. The second soundproof space S2 is formed between the first connecting portion 34 and the third connecting portion 53.

[0051] According to this configuration, a first sound insulating space S1 and a second sound insulating space S2 that are isolated from each other by the first connecting portion 34 are formed inside the grommet 10. The first sound insulating space S1 and the second sound insulating space S2 can improve sound insulation. Furthermore, according to this configuration, the first sound insulating space S1 and the second sound insulating space S2 are arranged side by side in the insertion direction D of the wire harness W. This makes it possible to gradually insulate the transmitted sound that propagates through the assembly hole Pa between the interior side and the exterior side partitioned by the vehicle body panel P by the first sound insulating space S1 and the second sound insulating space S2 of the grommet 10.

[0052] (5) The first connecting portion 34, the second connecting portion 44, and the third connecting portion 53 each have the first to third flexible portions 61, 71, and 81 that can bend to absorb the inclination of the wire harness W relative to the vehicle body panel P. As a result, when the inclination angle of the wire harness W passing through the mounting hole Pa is changed as shown in FIG. 4, the inclination of the wire harness W can be absorbed by the bending of the first to third flexible portions 61, 71, and 81. That is, even if the first to third tubular portions 33, 43, and 52 are inclined following the inclination of the wire harness W, the bending of the first to third flexible portions 61, 71, and 81 can suppress the deformation of the first base portion 32 including the seal portion 36. As a result, the first to third flexible portions 61, 71, and 81 can suppress the inclination of the wire harness W from affecting the sealing performance of the seal portion 36.

[0053] (6) The second member 12 has a covering portion 45 configured to be able to cover the insertion hole Ba of the sound-insulating member B provided on one side of the vehicle body panel P. According to this configuration, the covering portion 45 of the second member 12 covering the insertion hole Ba of the sound-insulating member B can improve sound insulation.

[0054] (7) The second connecting portion 44 connecting the second base portion 41 including the covering portion 45 to the second tubular portion 43 is provided with the second flexible portion 71. Therefore, the second flexible portion 71 makes it possible to suppress deformation of the covering portion 45 due to the inclination of the wire harness W with respect to the vehicle body panel P. This makes it possible to bring the covering portion 45 into contact with the sound-insulating member B without any gaps, regardless of the inclination angle of the wire harness W. As a result, it is possible to suppress deterioration of sound insulation due to the occurrence of gaps between the covering portion 45 and the sound-insulating member B.

[0055] (8) The first to third flexible portions 61, 71, 81 each have a bent portion 62, 72, 82 serving as a first thin-walled portion configured to have a thickness thinner than the radial thickness of the first base portion 32. According to this configuration, the bent portions 62, 72, 82 serving as the first thin-walled portions in the first to third connecting portions 34, 44, 53 can more suitably absorb the inclination of the wire harness W.

[0056] (9) The first to third flexible portions 61, 71, 81 each have a bent portion 62, 72, 82 having a bent shape that is convex in the axial direction. According to this configuration, the bent portions 62, 72, 82 in the first to third connecting portions 34, 44, 53 can more suitably absorb the inclination of the wire harness W.

[0057] (10) The second flexible portion 71 has a bellows portion 73 that is cylindrical and coaxial with the second cylindrical portion 43. According to this configuration, the bellows portion 73 of the second flexible portion 71 can more suitably absorb the inclination of the wire harness W.

[0058] (11) The first to third flexible portions 61, 71, 81 are provided continuously over the entire circumference in the circumferential direction. This configuration makes it easier to absorb the inclination of the wire harness W compared to a case in which the first to third flexible portions 61, 71, 81 are each provided partially in the circumferential direction.

[0059] (12) The second flexible portion 71 has the bent portion 72 as a second thin portion configured to be thinner than the thickness of the covering portion 45. With this configuration, it is possible to configure the bent portion 72 to be more easily deformed than the covering portion 45. Therefore, it is possible for the bent portion 72 to more suitably suppress deformation of the covering portion 45 caused by the inclination of the wire harness W with respect to the vehicle body panel P.

[0060] This embodiment can be modified as follows: This embodiment and the following modifications can be combined with each other to the extent that there is no technical contradiction. The configurations such as the shapes of the first to third flexible portions 61, 71, 81 are not limited to those in the above embodiment and can be changed as appropriate. For example, in the first to third flexible portions 61, 71, 81, the axial protruding directions of the bent portions 62, 72, 82 are not limited to those in the above embodiment and can be changed as appropriate.

[0061] Also, for example, in the configuration shown in FIG. 5, the shape of the first flexible portion 61 is changed from that of the above embodiment. As shown in the figure, the first flexible portion 61 has a flat plate portion 91. The flat plate portion 91 is formed, for example, in a flat plate shape perpendicular to the axis L. The first flexible portion 61 of this example is configured not to have a bent portion 62 like the first flexible portion 61 of the above embodiment. The flat plate portion 91 is formed over the entire circumference of the first flexible portion 61 in the circumferential direction. The flat plate portion 91 has, for example, a first thin portion 92. The axial thickness of the first thin portion 92 is configured to be thinner than the radial thickness of the first base portion 32. This makes it easier for the first flexible portion 61 to bend in response to the inclination of the wire harness W. The radially inner edge portion of the flat plate portion 91 is connected to one axial end of the first cylindrical portion 33.

[0062] 5, the first flexible portion 61 does not have a bent portion folded back so as to be convex in the axial direction. Therefore, when the first to third flexible portions 61, 71, 81 are deformed in accordance with the inclination of the wire harness W, it is possible to prevent the first flexible portion 61 from interfering with the second flexible portion 71 and the third flexible portion 81.

[0063] In the above embodiment, each of the first to third connecting portions 34, 44, 53 is provided with a flexible portion (first to third flexible portions 61, 71, 81), but this is not particularly limited, and any one or two of the first to third flexible portions 61, 71, 81 may be omitted.

[0064] A connecting structure may be used in which the first fixing portion 42 and the connecting recess 35a of the first base portion 32 are structurally interchanged. Similarly, a connecting structure may be used in which the second fixing portion 51 and the connecting recess 35b of the first base portion 32 are structurally interchanged.

[0065] In the above embodiment, the second member 12 is configured to be fixed to the inner surface of the first base portion 32 by the first fixing portion 42. However, the second member 12 may also be configured to be fixed to the axial end surface of the first base portion 32, for example.

[0066] The shape of the covering portion 45 as viewed from the axis L direction is not limited to a circle, but may be changed as appropriate to, for example, an ellipse or a polygon. The shape of the seal portion 36 as viewed from the axis L is not limited to a circle, but may be changed as appropriate to, for example, an ellipse depending on the shape of the mounting hole Pa.

[0067] In the second member 12 of the above embodiment, the covering portion 45 may be omitted. In the above embodiment, the grommet 10 is configured with the first to third members 11, 12, and 13, but this is not particularly limited, and the grommet 10 may be configured by adding one or more members in addition to the first to third members 11, 12, and 13.

[0068] The elastic material used for the outer portion 31 of the first member 11, the second member 12, and the third member 13 is not limited to EPDM, and other materials such as NBR (acrylonitrile butadiene rubber) can also be used.

[0069] The first member 11 in the above embodiment includes an inner portion 21 and an outer portion 31, but is not particularly limited to this, and the inner portion 21 may be omitted from the first member 11 in the above embodiment.

[0070] In the present embodiment, the protruding portion Pb on the periphery of the assembly hole Pa protrudes toward the first surface P1, but the present invention is not limited to this, and the protruding portion Pb may protrude toward the second surface P2. The protruding portion Pb may be omitted from the assembly hole Pa in the above embodiment, that is, the assembly hole Pa may not be subjected to burring.

[0071] The embodiments and modified examples disclosed herein are illustrative in all respects, and the present invention is not limited to these examples. That is, the scope of the present invention is defined by the claims, and it is intended to include all modifications within the meaning and scope equivalent to the claims. [Explanation of symbols]

[0072] 10 Grommet 11 First Component 12 Second member 13 Third Component 21 Inner section 22 Base 23 Locking piece 24 Flange 31 Outer section 32 First base part (base part) 33 First cylinder part 34 1st connection part 35 Inner cylinder part 35a Connection recess 35b Connection recess 36 Seal part 41 Second base part 42 1st fixed part 43 Second cylinder part (cylindrical part) 44 2nd connection part 45 Covering part 51 Second fixed part 52 Third cylinder part (cylindrical part) 53 3rd connection part 61 1st flexible part (flexible part) 62 Bend 71 Second flexible part (flexible part) 72 Bend 73 Bellows 81 Third flexible part (flexible part) 82 Bend 91 Flat plate part 92 1st thin section B. Sound-proofing material Ba Through hole D Insertion direction L axis P Body panel (panel) P1 1st side (one side) P2 2nd page Pa assembly hole Pb protrusion S1 First soundproof space S2 Second soundproof space W Wire Harness

Claims

1. A grommet to be attached to an attachment hole of a panel through which a wire harness is passed, The direction in which the wire harness passes is defined as an insertion direction, a first member having a seal portion in contact with the panel; a second member attached to one side of the first member in the insertion direction and having a tubular portion through which the wire harness is inserted; a third member that is assembled to the first member on the other side of the insertion direction and has a tubular portion through which the wire harness is inserted, The cylindrical portion of the second member is a second cylindrical portion, and the cylindrical portion of the third member is a third cylindrical portion, the first member includes a base portion having the seal portion, a first tubular portion through which the wire harness is inserted, and a first connecting portion connecting the first tubular portion and the base portion, the second member has a first fixing portion fixed to the base portion and a second connecting portion connecting the first fixing portion and the second cylindrical portion, The third member has a second fixing portion fixed to the base portion and a third connecting portion connecting the second fixing portion and the third cylindrical portion. Grommet.

2. The first member and the second member form a first sound insulating space therebetween, The first member and the third member form a second sound insulating space therebetween. The grommet of claim 1 .

3. The first connecting portion, the second connecting portion, and the third connecting portion are arranged at intervals from each other in the insertion direction, The first connecting portion is located between the second connecting portion and the third connecting portion, The first sound insulating space is formed between the first connecting portion and the second connecting portion, The second sound insulating space is formed between the first connecting portion and the third connecting portion. The grommet of claim 2.

4. At least one of the first connecting portion, the second connecting portion, and the third connecting portion has a flexible portion that can bend to absorb an inclination of the wire harness relative to the panel. The grommet according to any one of claims 1 to 3.

5. The second member has a covering portion configured to be able to cover an insertion hole of a sound-proofing member provided on one side surface of the panel. The grommet according to any one of claims 1 to 4.

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