JP2012235637A - Grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grommet having excellent waterproof performance.SOLUTION: A grommet 10 is attached to a wiring harness 12 which is disposed so as to pass through a through hole 18h formed at a vehicle panel 18. The grommet 10 includes an overhanging part 40 to which the vehicle panel 18 is attached; and a first insertion part 20 which connects with the overhanging part 40 and forms an insertion hole 20h allowing the wiring harness 12 to be inserted therein at the interior. The first insertion part 20 has multiple pressing parts 211, 212, 213 for pressing an outer peripheral surface of the wiring harness 12 at multiple positions arranged along the insertion hole 20h, and opening centers C1, C2, C3 of the multiple pressing parts 211, 212, 213 are arranged in a non-linear manner.

Description

  The present invention relates to a grommet used when a wire harness is disposed through a panel in a vehicle such as an automobile.

  For example, when a wire harness routed in an automobile or the like is disposed through a panel that partitions between a passenger compartment (inside) and an engine room (outside), the wire harness is inserted through the grommet. Is mounted in a through-hole formed in the panel.

  The through hole of the grommet for inserting the wire harness has an inner diameter slightly smaller than the outer diameter of the wire harness. When the wire harness is inserted through such a through hole, the grommet presses and holds the wire harness with the pressing force based on the difference in diameter. Thereby, the inundation from the outdoor space to the indoor space via the through hole or the wire harness is suppressed. Several types of grommets of this type have been proposed so far (for example, Patent Document 1).

JP 2005-324613 A

  Here, the structure of the grommet according to one proposed example will be described with reference to FIG. FIG. 6 is a longitudinal sectional view showing the grommet 100. The grommet 100 includes an indoor small diameter cylindrical portion 120 and an outdoor small diameter cylindrical portion 130 through which the wire harness 112 is inserted, and a large diameter cylindrical portion 140 attached to the through hole 118h of the vehicle body panel 118. On the outer peripheral surface of the large-diameter cylindrical portion 140, an annular groove 141 in which the peripheral portion of the through hole 118h is mounted is formed.

  An annular projecting portion 121 projecting inward is formed on the inner peripheral surface of the indoor-side small-diameter cylindrical portion 120. The protrusions 121 are provided at a plurality of locations along the insertion direction of the wire harness 112, and are configured to press the outer peripheral surface of the inserted wire harness 112. When the wire harness 112 is attached to the indoor small diameter cylindrical portion 120, the opening of the indoor small diameter cylindrical portion 120 is widened, and the wire harness 112 is inserted into the interior. Moreover, the outer peripheral surface of the outdoor small-diameter cylindrical portion 130 is wound and fixed with a tape or the like with the wire harness 112 inserted.

  By the way, in the grommet 100, a plurality of wires passing through the wire harness 112 are tightened by the pressing force of the protrusion 121. A water-stopping agent is applied to this wiring, and the water-stopping agent penetrates into the gaps between the wires by tightening the wiring group by the pressing force of the protrusion 121. Thereby, the water stop inside the wire harness 112 is achieved.

  However, the surface of the protrusion 121 is formed in a cross-sectional arc shape. Therefore, the surface that presses the wire harness 112 is substantially linear. Therefore, in the portion of the wire harness 112 that is tightened by the protruding portion 121, the water-stopping agent applied to the wiring is easily pushed out to the side. Therefore, in this tightening portion, the amount of the water-stopping agent is extremely small, and it is difficult to sufficiently penetrate the water-stopping agent into the gaps between the wirings. For this reason, it is difficult to obtain a sufficient water stop effect.

  Then, an object of this invention is to provide the grommet excellent in the water stop property.

  In order to solve the above-mentioned problem, a first aspect is a grommet to be attached to a wire harness disposed through a through hole formed in a panel, the panel attaching portion for attaching the panel, An insertion portion connected to the panel mounting portion and having an insertion hole through which the wire harness is inserted; and an insertion portion having a pressing portion that presses an outer peripheral surface of the wire harness, the insertion portion including the wire harness Is held in a bent state.

  Moreover, the 2nd aspect is a grommet which concerns on a 1st aspect, The said insertion part has the said press part in the several location along the direction where the said insertion hole is extended, The opening of several said press part The centers are arranged on a non-linear line.

  Moreover, the 3rd aspect WHEREIN: The grommet which concerns on the 1st or 2nd aspect WHEREIN: The said press part has a part protruded inside from the internal peripheral surface which forms the said insertion hole of the said insertion part.

  According to a fourth aspect, in the grommet according to any one of the first to third aspects, the thickness of the pressing portion is not uniform in the circumferential direction of the insertion portion.

  Moreover, the 5th aspect WHEREIN: The grommet which concerns on any one aspect from the 1st to 4th aspect WHEREIN: The said press part carries out the longitudinal cross-section of the said insertion part in the outer peripheral surface of the said wire harness penetrated by the said insertion part. Press on a surface that is flat on the surface.

  According to the grommets according to the first to fifth aspects, the wiring in the wire harness can be bent by holding the wire harness inserted through the insertion portion in a bent state. A gap can be formed. Thereby, since a water stop agent becomes easy to osmose | permeate between wiring, the water stop inside a wire harness can be improved.

  According to the grommet which concerns on a 2nd aspect, the wire harness can be bent in the part in which the press part is provided by arrange | positioning the opening center of a some press part non-linearly. Thereby, since a clearance gap is formed between the wiring of the position corresponding to a press part, a water stop agent becomes easy to osmose | permeate between wiring. Therefore, the water stop inside the wire harness can be improved.

  According to the grommet which concerns on a 3rd aspect, a wire harness can be reliably pressed in a protrusion part by forming the press structure made to protrude inside in an insertion hole.

  According to the grommet which concerns on a 4th aspect, a wire harness can be tightened with strength and weakness regarding the circumferential direction. Thereby, since the water stop agent apply | coated to the wiring in a wire harness becomes easy to osmose | permeate between wiring in the part currently clamp | tightened by the press part, the water stop inside a wire harness can be improved.

  According to the grommet which concerns on a 5th aspect, a wire harness can be clamped over a wide range by pressing a wire harness in the surface which becomes flat in a longitudinal cross section. Thereby, since the water stop agent inside a wire harness can be spread over a wide range, the water stop inside a wire harness can be improved.

It is a perspective view which shows the grommet which concerns on 1st Embodiment. It is a longitudinal cross-sectional view which shows the grommet shown in FIG. It is a longitudinal cross-sectional view which shows the 1st insertion part by which the wire harness is penetrated. It is the IV-IV sectional view taken on the line shown in FIG. It is a longitudinal cross-sectional view which shows the 1st insertion part 20a which concerns on 2nd Embodiment. It is a longitudinal cross-sectional view which shows a grommet.

{1. First Embodiment}
Hereinafter, the grommet 10 according to the first embodiment will be described. FIG. 1 is a perspective view showing a grommet 10 according to the first embodiment. FIG. 2 is a longitudinal sectional view showing the grommet 10 shown in FIG. Furthermore, FIG. 3 is a longitudinal sectional view showing the first insertion part 20 through which the wire harness 12 is inserted.

  The grommet 10 is attached to a wire harness 12 in which a plurality of wirings 12L are bundled. In the present embodiment, the wire harness 12 is disposed between the first section 18A and the second section 18B separated by the vehicle body panel 18. As a specific example, the first section 18A corresponds to a vehicle compartment (indoor) side space, and the second section 18B corresponds to an engine room or the like. In the following description, the direction from the first section 18A side to the second section 18B side is the X direction.

  The vehicle body panel 18 is formed with a substantially cylindrical (or elliptical columnar) through hole 18h. The wire harness 12 is installed at a boundary portion between the first section 18A and the second section 18B through the through hole 18h.

  The grommet 10 is attached to a portion of the wire harness 12 that passes through the through hole 18 h of the vehicle body panel 18. In other words, the wire harness 12 is installed between the first section 18A and the second section 18B through the grommet 10 attached to the through hole 18h. The grommet 10 protects the wire harness 12 at a portion where the wire harness 12 passes through the through hole 18h. In addition, the grommet 10 prevents intrusion of liquid such as water from the second section 18B (for example, engine room) to the first section 18A (for example, vehicle compartment space).

  The grommet 10 includes a first insertion part 20 through which the wire harness 12 is inserted, a second insertion part 30, and an overhang part 40. The overhang portion 40 is disposed between the first insertion portion 20 and the second insertion portion 30. The grommet 10 according to the present embodiment is integrally formed of an elastic material such as an elastomer (rubber or the like) as a whole. That is, the first insertion part 20, the second insertion part 30, and the overhang part 40 are integrally molded by, for example, an injection mold. In addition, the grommet 10 is not limited to such an integrally formed product, and may be configured by a plurality of members combined with each other.

  The first insertion part 20 is a cylinder that forms an insertion hole 20 h for inserting the wire harness 12. More specifically, the 1st penetration part 20 is formed in the substantially cylindrical shape extended toward the front-end | tip part by the side of the 1st division 18A from the base end part by the side of the 2nd division 18B. That is, in the present embodiment, the first insertion portion 20 extends along the X direction. The shape of the internal space of the first insertion portion 20 corresponds to the cross-sectional shape of the wire harness 12. Therefore, the first insertion portion 20 does not necessarily have a cylindrical shape, and may have an elliptical cylindrical shape, a polygonal cylindrical shape, or the like.

  The second insertion portion 30 is formed with a slit 31 cut out to a required length from the opening end on the second section 18B side toward the overhang portion 40. Only one slit 31 may be provided in the second insertion part 30, or two or more slits 31 may be provided in the circumferential direction of the second insertion part 30 with a required interval. However, the slit 31 can be omitted.

  When the wire harness 12 is inserted through the second insertion part 30, a tape is wound around the outer peripheral surface of the second insertion part 30. Thereby, the 2nd penetration part 30 is diameter-reduced and the 2nd penetration part 30 and the wire harness 12 are fixed integrally. At this time, since the slits 31 are provided in the second insertion part 30, bending of the wall part of the second insertion part 30 is suppressed. Thereby, the inner peripheral surface of the second insertion portion 30 can be brought into close contact with the outer peripheral surface of the wire harness 12. Therefore, since it can suppress that a gap | interval generate | occur | produces between the 2nd penetration part 30 and the wire harness 12, the sound insulation property and the water stop property of the grommet 10 improve.

  The overhanging portion 40 is formed in a skirt shape that gradually expands from the middle of the first insertion portion 20 extending along the X direction toward the base end side of the first insertion portion 20 while gradually expanding the diameter. ing. In addition, the overhang | projection part 40 may be formed in the truncated cone shape, and may be formed in the polygon frustum shape. A circumferential groove 42 corresponding to the shape of the through hole 18h of the vehicle body panel 18 is formed in an annular shape on the outer peripheral surface of a portion of the overhanging portion 40 that is larger than the through hole 18h. By inserting the inner peripheral edge of the through hole 18 h into the circumferential groove 42, the grommet 10 is attached and fixed to the through hole 18 h of the vehicle body panel 18. That is, in this embodiment, the overhang | projection part 40 is a panel attachment part.

  When the wire harness 12 is attached to the first insertion portion 20 and the second insertion portion 30, an air layer 40 </ b> S that is a substantially sealed space is formed inside the overhang portion 40. By forming the air layer 40S, the sound insulation of the grommet 10 is improved.

  The first insertion part 20 is provided with a plurality of annular pressing parts 21 (pressing parts 211, 212, 213) that protrude inward from the inner peripheral surface of the first insertion part 20. The plurality of pressing portions 21 are provided in the insertion hole 20h of the first insertion portion 20 with a predetermined interval in the longitudinal direction of the insertion hole 20h (here, the X direction). In the present embodiment, pressing portions 211 and 213 are provided at the opening end portions on both sides of the first insertion portion 20 (that is, the distal end portion on the first compartment 18A side and the proximal end portion on the second compartment 18B side). In addition, a pressing portion 212 is provided at a position therebetween (here, the central portion). In addition, the quantity, the position, etc. of the press part 21 are not limited to this, It can change suitably.

  The protruding height of the pressing portion 21 protruding from the inner peripheral surface of the first insertion portion 20 is set according to the outer diameter of the wire harness 12. In the present embodiment, the protruding height of the pressing portion 21 is set so that the inner diameter of the opening formed by the pressing portion 21 is smaller than the outer diameter of the wire harness 12. In the state where the wire harness 12 is mounted, the wire harness 12 is pressed from the outside to the inside by the elastic force resulting from the diameter expansion of the pressing portion 21. That is, the pressing portion 21 constitutes a pressing structure that presses and seals the outer peripheral surface of the wire harness 12. Furthermore, the wiring 12 </ b> L inside the wire harness 12 is tightened by the pressing force (tightening force) of the pressing portion 21. As a result, a fluid-like water-stopping agent (silicon-based water-stopping agent, modified ester resin, synthetic rubber-based water-stopping agent, etc.) previously applied to the wiring 12L is spread and easily penetrates between the wirings 12L. Therefore, the water stop in the wire harness 12 is improved.

  By tightening the wire harness 12 locally by the protruding structure such as the pressing portion 21, the water stoppage of the grommet 10 can be improved as compared with the case where the wire harness 12 is tightened on a flat surface.

  2, the inner peripheral surface of the pressing portion 21 forms a smooth surface 21S that extends substantially parallel to the longitudinal direction of the first insertion portion 20 (here, the X direction). ing. The smooth surface 21 </ b> S is a smooth curved surface formed in an annular shape, and is a surface that is flat in the longitudinal section of the first insertion portion 20. The smooth surface 21 </ b> S serves as a pressing surface that presses the outer peripheral surface of the wire harness 12.

  Therefore, the wire harness 12 can be pressed over a wider range than in the case of a structure that presses on a substantially linear surface (for example, the protruding portion 121 shown in FIG. 6). Thereby, the some wiring 12L which passes the inside of the wire harness 12 can be pressed in the wide range. For this reason, in the part fastened by the press part 21, a water stop agent becomes easy to osmose | permeate between the wiring 12L. Therefore, the water stoppage inside the wire harness 12 is improved.

  4 is a cross-sectional view taken along line IV-IV shown in FIG. In FIG. 4, only the first insertion part 20 is illustrated. As shown in FIG. 4, the pressing portion 21 is formed with an uneven thickness in the circumferential direction. For this reason, the protruding height of the pressing portion 21 from the inner peripheral surface of the first insertion portion 20 that forms the insertion hole 20 h changes in the circumferential direction of the first insertion portion 20.

  More specifically, the pressing part 21 has a thickest part (thickness D1) and a thinnest part (thickness D2) in the circumferential direction of the first insertion part 20. Due to the difference in thickness in the circumferential direction, the pressing force on the wire harness 12 is different. That is, the thicker the wall, the larger the pressing force, and the thinner the wall, the smaller the pressing force. Therefore, in the pressing portion 21, the wire harness 12 is tightened with a non-uniform pressing force in the circumferential direction.

  If the pressing part 21 applies a uniform pressing force to the wire harness 12 in the circumferential direction of the first insertion part 20, the water stop agent applied to the wiring 12 </ b> L in the wire harness 12 is lateral (wire (The direction in which the harness 12 extends). In such a case, there is a possibility that the water-stopping agent is extremely reduced at the position corresponding to the pressing portion 21 in the wire harness 12 and the water-stopping agent moves to the side portion thereof. Moreover, there exists a possibility that a water stop agent may move to the outer side in the press part 211, 213 vicinity at the both-sides opening edge part of the 1st insertion part 20 (lateral leakage).

  On the other hand, in the 1st penetration part 20 which concerns on this embodiment, it can clamp | tighten by the nonuniform pressing force regarding the circumferential direction of the wire harness 12. FIG. Accordingly, the tightening force can be increased or decreased, and the water-stopping agent applied to the wiring 12L tends to stay in the portion corresponding to the pressing portion 21, so that the water-stopping agent easily penetrates between the wirings 12L. Thereby, the water stop inside the wire harness 12 improves.

  In the present embodiment, as shown in FIG. 2, the opening centers C1, C2, and C3 of the pressing portions 211, 212, and 213 are non-linear in a side view (that is, viewed from a direction perpendicular to the X direction). Arranged above. That is, the line segment L1 connecting the opening center C1 of the pressing part 211 and the opening center C2 of the pressing part 212 is connected to the line segment L2 connecting the opening center C3 of the pressing part 213 and the opening center C2 of the pressing part 212. It extends in the intersecting direction. Therefore, as shown in FIG. 4, when the insertion hole 20h is viewed along the X direction from the first section 18A side, the opening center C1 of the pressing portion 211 and the opening center C2 of the pressing portion 212 are different. It will be arranged in the position. Furthermore, although illustration is omitted, the opening center C2 of the pressing part 212 and the opening center C3 of the pressing part 213 are arranged at different height positions.

  By setting the opening positions of the pressing portions 211, 212, and 213 in this manner, the wire harness 12 can be held in the bent state in the first insertion portion 20 as shown in FIG. By bending the wire harness 12, the wiring 12L routed inside can be bent, so that a required gap can be generated between the wirings 12L. As a result, the water-stopping agent pushed out by the pressing part 21 can be permeated into the gap generated by this bending, and side leakage can be suppressed. Thereby, since the water stop agent can be permeated between the wirings 12 </ b> L in the pressing portion 21, the water stop inside the wire harness 12 can be improved.

  In addition, when the cross-sectional shape in the press part 21 is circular shape (an ellipse shape is included), the opening center of the press part 21 is made into the center of the circle. Moreover, when the opening shape of the cross section in the press part 21 is non-circular (for example, polygonal), it is good also considering the gravity center of the opening shape of each press part 21, etc. as an opening center.

  Moreover, in this embodiment, the press part 21 which has the smooth surface 21S is formed in the both-sides opening edge part and center part of the 1st insertion part 20. As shown in FIG. However, the pressing part 21 having the smooth surface 21S is provided only in a part (for example, only in the center) of these, and the other pressing structure (for example, the projecting part having an arcuate cross section as shown in FIG. 121) may be provided. However, the water-stopping effect of the grommet 10 can be improved by providing the pressing portion 21 having the smooth surface 21S at all locations.

  For example, in order to prevent intrusion of liquid such as water from the second compartment 18B into the first compartment 18A, the pressing portion 213 located at the opening end on the second compartment 18B side forms a smooth surface 21S. It is desirable. Thereby, since it can suppress that liquids, such as water, penetrate | invade into the part which passes the 1st insertion part 20 among the wire harnesses 12, it can suppress effectively that liquids, such as water, penetrate | invade to the 1st division 18A side. .

{2. Second Embodiment}
FIG. 5 is a longitudinal sectional view showing the first insertion part 20a according to the second embodiment. The grommet according to the present embodiment has substantially the same configuration as the grommet 10 shown in FIG. 1 or FIG. 2, but is provided with a first insertion part 20 a instead of the first insertion part 20. Is different.

  The first insertion portion 20a according to the present embodiment has pressing portions 21a (pressing portions 211a, 212a, and 213a) at both side opening end portions and a central portion therebetween. That is, the position where the pressing portion 21 a is provided in the first insertion portion 20 a is substantially the same as the position where the pressing portion 21 is provided in the first insertion portion 20. However, in the first insertion portion 20, the pressing portion 21 is formed with an annular pressing portion 21 that is thickened by protruding inward from the inner peripheral surface thereof. On the other hand, in this embodiment, the annular | circular shaped press part 21a which becomes thick by spreading outside from the outer peripheral surface of the 1st insertion part 20a is formed. And the thin part 21b is formed between the press part 21a and the press part 21a.

  Further, the insertion hole 20ah of the first insertion portion 20 is formed so as to be bent in the middle thereof. Specifically, the opening centers C1a, C2a, and C3a of the pressing portions 211a, 212a, and 213a are arranged on a non-straight line in a side view. That is, the line segment L1a connecting the opening center C1 of the pressing part 211a and the opening center C2 of the pressing part 212a intersects the line segment L1b connecting the opening center C3 of the pressing part 213a and the opening center C2 of the pressing part 212a. To do.

  When the wire harness 12 is inserted through such a first insertion part 20a, the diameter of the first insertion part 21a is increased. Then, in the pressing portion 21a and the thin portion 21b, elastic forces having different sizes are generated in the first insertion portion 20a. Specifically, a larger elastic force is generated in the portion of the pressing portion 21a than in the thin portion 21b. Therefore, in the pressing part 21a, the wire harness 12 can be pressed with a force larger than that of the thin part 21b.

  In the present embodiment, the insertion hole 20ah is formed to bend at a position where the pressing portion 212a is provided. Therefore, the wiring 12L inside the wire harness 12 inserted through the insertion hole 20ah can be bent. For this reason, since a gap can be formed between the wirings 12L, the water-stopping agent pushed out by the pressing force tends to stay in this gap. Therefore, since it becomes easy to make a water stop agent osmose | permeate in the press part 21a, the water stop inside the wire harness 12 can be improved.

  Moreover, the press part 21a is formed so that thickness may become non-uniform | heterogenous regarding the circumferential direction of the 1st insertion part 20a similarly to the press part 21. FIG. By being formed in this way, when the wire harness 12 is inserted, the wire harness 12 can be tightened with a non-uniform pressing force in the circumferential direction. By providing such a pressing portion 21a, the wire harness 12 can be tightened with strength in the circumferential direction. Therefore, similarly to the first insertion part 20, also in the first insertion part 20a, it is possible to suppress the lateral leakage of the water stop agent applied to the wiring 12L. Thereby, the water stop of the 1st penetration part 20a can be improved.

{3. Modification}
Although the embodiment has been described above, the present invention is not limited to the above, and various modifications are possible.

  For example, in the first insertion part 20 according to the first embodiment, the pressing part 21 forms a smooth surface 21S parallel to the X direction. The wire harness 12 may be further bent by inclining the smooth surface 21S with respect to the X direction. For example, in FIG. 3, the smooth surface 21 </ b> S of the pressing portion 211 is an inclined surface that is inclined in a direction that is bent from the extending direction of the line segment L <b> 1 (for example, the extending direction of the line segment L <b> 2). Bending can be promoted. Thereby, since it becomes easy to form a clearance gap between wiring 12L, it can make it easy to infiltrate a waterproofing agent.

  Moreover, in the grommet 10 which concerns on 1st Embodiment, although the 1st insertion part 20 is provided in the 1st division 18A side via the overhang | projection part 40, the 2nd insertion part 30 is provided in the 2nd division 18B side, The second insertion part 30 may be provided on the one partition side 18A side, and the first insertion part 20 may be provided on the second partition 18B side. Further, the first insertion portion 20 may be connected instead of the second insertion portion 30 in the grommet 10. That is, you may make it provide the 1st insertion parts 20 and 20 in the both sides of the overhang | projection part 40. FIG.

  Further, the pressing portion 21 according to the first embodiment is provided so as to protrude only inward from the inner peripheral surface of the first insertion portion 20. However, like the pressing part 21a according to the second embodiment, the pressing part 21 may be formed so as to protrude outward from the outer peripheral surface of the first insertion part 20 as well.

  Moreover, in the said embodiment, although the press parts 21 and 21a are provided so that thickness may become non-uniform | heterous regarding the circumferential direction of the 1st insertion parts 20 and 20a, forming so that it may become uniform is not prevented. .

  Moreover, in the 1st insertion part 20a which concerns on 2nd Embodiment, it is also possible to abbreviate | omit the press part 21a. In such an insertion part, the wire harness 12 will be pressed by the whole inner peripheral surface. Even in such a case, by bending the wire harness 12, the water-stopping agent tends to stay at the bent portion and easily penetrates between the wirings.

  Moreover, each structure demonstrated by said each embodiment and each modification can be suitably combined or abbreviate | omitted unless it mutually contradicts.

10, 100 Grommet 12 Wire harness 12L Wiring 18A First section 18B Second section 18 Body panel (panel)
18h Through-hole 20, 20a First insertion part (insertion part)
20h, 20ah insertion hole 21, 211-213, 21a, 211a-213a Press part 21S Smooth surface 40 Overhang part (panel attachment part)
C1, C2, C3, C1a, C2a, C3a Opening center L1, L2 line segment

Claims (5)

A grommet attached to a wire harness disposed through a through hole formed in the panel,
A panel mounting portion for mounting the panel;
An insertion portion connected to the panel attachment portion, forming an insertion hole through which the wire harness is inserted, and having a pressing portion that presses the outer peripheral surface of the wire harness;
With
The insertion portion is a grommet that holds the wire harness in a bent state. The grommet according to claim 1,
The insertion portion has the pressing portion at a plurality of locations along the extending direction of the insertion hole,
A grommet in which the opening centers of the plurality of pressing portions are arranged in a non-linear manner. The grommet according to claim 1 or 2,
The said press part is a grommet which has a part which protrudes inside from the internal peripheral surface which forms the said insertion hole of the said insertion part. In the grommet according to any one of claims 1 to 3,
A grommet in which the thickness of the pressing portion is not uniform in the circumferential direction of the insertion portion. In the grommet according to any one of claims 1 to 4,
The said press part is a grommet which presses the outer peripheral surface of the said wire harness inserted in the said insertion part by the surface which becomes flat in the longitudinal cross-section of the said insertion part.

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