JP4851830B2 - Grommet - Google Patents

Description

  The present invention relates to a grommet for protecting a wire harness arranged through a through hole formed in a body panel of a vehicle.

  The grommet that protects the wire harness is inserted through the through-hole while the wire harness is placed through the through-hole formed in the body panel of the vehicle, such as an automobile, while preventing water from entering the body panel. In this state, it is stabilized so as not to move in any direction across the through hole. Specifically, in a state where the grommet is attached to the through hole, even when a tensile force acts on the wire harness from either side across the through hole, the grommet does not leave the through hole, A body panel around the through hole is fitted (see Patent Documents 1 and 2).

JP 2003-164043 A (Claim 1, paragraphs 0010 to 0013, FIGS. 3 and 4) Japanese Patent Laying-Open No. 2003-235131 (paragraphs 0021 to 0023, FIG. 1)

  When the body panel is fitted to the outer periphery of the grommet, the grommet is inserted into the through hole from the engine room side to the indoor side as shown in FIG. Furthermore, when the outer peripheral portion passes through the through-hole, the body panel around the through-hole is fitted into a groove formed in the outer peripheral portion in the circumferential direction. In order to reduce the resistance that the outer periphery receives from the body panel when the outer periphery of the grommet tries to pass through the through-hole, the inner surface of the outer periphery gradually increases in diameter from the indoor side to the engine room side. An expanding slope is added.

  When the grommet is pushed in from the engine room side, the part near the outer periphery of the outer peripheral part is forced to bend and deformed by the body panel around the through hole that contacts the inclined surface of the outer peripheral part, and then passes through the through hole to restore it. By doing so, the body panel fits into the groove.

  The groove is formed between the convex part located on the front side and the convex part located on the rear side when the grommet is inserted, but when the grommet is attached to the through hole and receives a tensile force from the indoor side The height (lapping margin) from the groove of the convex portion on the rear side is ensured to be about 5 mm so that it does not come out of the through hole. Further, the height of the convex portion on the front side from the groove (lapping margin) is secured to about 3 mm so that the grommet does not come out of the through hole when receiving a tensile force from the engine room side.

  Since the body panel gets over the convex part on the front side and enters the fitting groove and engages with the convex part on the rear side to maintain the fitting state, the height of the convex part on the front side is the convex part on the rear side. Therefore, the resistance force to the tensile force from the rear side is smaller than the resistance force to the tensile force from the front side, and the grommet may come out of the through hole by the tensile force from the rear side.

  Further, when the grommet penetrates the two body panels because the height of the convex portion on the rear side is ensured to be larger than the height of the convex portion on the front side, the convex portion on the front side is After passing through the through hole, the resistance when the rear convex portion passes through the through hole is increased. Therefore, when passing the grommet completely through the through hole, it takes a considerable amount of force to push the grommet into the room until the rear convex part passes through the front convex part. The insertion workability of the grommet is poor, and an excessive tensile force may be applied to the surface of the outer periphery of the grommet when pushed.

  From the above background, the present invention proposes a grommet that is easy to insert into a through hole and that is highly stable when mounted in the through hole.

The grommet according to claims 1 and 3 includes a cylindrical inner peripheral portion through which the wire harness is inserted, an outer peripheral portion integrated with the outer periphery thereof, and a connecting portion connecting the inner peripheral portion and the outer peripheral portion, In the grommet in which the body panel of the vehicle is fitted around the through hole formed in the outer peripheral part, the outer peripheral part can be deformed to the inner peripheral side, and the body panel around the through hole is engaged rearwardly. A front lip that can be stopped, and a rear lip that can be locked to the front side on the body panel around the through-hole, and an outer peripheral convex portion is formed in a circumferential direction on the outer periphery of the inner peripheral portion. The inner peripheral convex part which can contact | abut to the said outer peripheral convex part is made into the circumferential direction in the inner periphery of the said outer peripheral part of the back side more than the back side.

  When the grommet tries to insert the through hole, the front lip of the outer peripheral portion comes into contact with the body panel around the through hole and is temporarily deformed to the inner peripheral side. Thereafter, when the front lip passes through the through hole, it is restored by elasticity, and at the same time, the body panel is fitted between the front lip and the rear lip. Specifically, the body panel is fitted into a fitting groove formed in the circumferential direction on the outer peripheral portion of the grommet, and this state is a mounting state in the through hole of the grommet. The front side and the rear side refer to the front side and the rear side with respect to the insertion direction of the grommet with respect to the through hole.

  The front lip that gets over when the body panel is fitted to the grommet is deformed to the inner peripheral side, so that the resistance when the front lip passes through the through hole is kept small, and the insertion workability to the through hole of the grommet is secured. In addition, an excessive tensile force is not applied to the grommet. The deformation of the front lip toward the inner peripheral side means that the inner peripheral part and the outer peripheral part are connected by a connecting part, and that the outer peripheral convex part of the inner peripheral part and the inner peripheral convex part of the outer peripheral part are shifted in the axial direction. This is possible.

  Although the resistance when the front lip passes through the through hole is small, the resistance against the tensile force from the rear side when the grommet is attached to the through hole may be reduced. An outer peripheral convex part is formed in the part, and an inner peripheral convex part that can come into contact with the outer peripheral convex part is formed on the outer peripheral part on the rear side thereof, so that a resistance force to the tensile force from the rear side is retained.

  When the grommet is mounted in the through-hole, the outer peripheral convex portion and the inner peripheral convex portion can be in contact with each other in the opposite direction, and when the grommet receives a tensile force from the rear side, the inner peripheral portion is in contact with the outer peripheral portion. The outer peripheral convex part of the inner peripheral part comes into contact with the inner peripheral convex part of the outer peripheral part, that is, the rear side. Since the outer peripheral convex portion is formed on the inner peripheral portion, the inner peripheral convex portion formed on the outer peripheral portion contacts the rear side, and also contacts the outer peripheral side from the inner peripheral side of the grommet.

  The outer peripheral convex part of the inner peripheral part abuts the inner peripheral convex part of the outer peripheral part from the inner peripheral side of the grommet to the outer peripheral side, so that the outer peripheral convex part restrains deformation of the outer peripheral part to the inner peripheral side, and the inner periphery of the front lip Since the deformation to the side is also constrained, the front lip maintains the state of being locked to the body panel against the tensile force from the rear side, and ensures stability against slipping out.

When the grommet is subjected to tensile force from the rear side, the outer convex portion of the inner peripheral portion abuts to the rear side to the inner peripheral protrusion of the outer peripheral portion, and the outer convex portions abut each other as described in claim 1 Each contact surface of the inner peripheral convex portion is inclined from the front side to the rear side toward the inner periphery side, or each contact surface is formed in a step shape having the same inclination, etc. It becomes possible. The inclination of the contact surface is not necessarily a flat surface and may be a curved surface.

  Each abutment surface of the outer peripheral convex portion and the inner peripheral convex portion is inclined from the outer peripheral side to the inner peripheral side from the front side to the rear side, so that the outer peripheral convex portion is rearward by the relative movement of the inner peripheral portion with respect to the outer peripheral portion. Since the component of the force that pushes the inner peripheral convex portion from the outer peripheral convex portion to the outer peripheral side is generated when the inner peripheral convex portion is brought into contact with the inner peripheral convex portion, the outer peripheral portion is pushed and expanded to the outer peripheral side. Deformation is constrained.

  When the grommet is attached to the through-hole and the grommet receives a tensile force from the front side, the body panel is locked to the rear lip of the outer peripheral portion and the rear lip resists the tensile force, so that the grommet Ensure stability against slipping out. The resistance force of the rear lip is obtained by giving the rear lip a certain thickness, or thickness and height, and providing rigidity.

  If the height of the rear lip from the fitting groove is increased, the front lip passes through the through hole, and after the body panel is locked to the rear lip, it becomes difficult for the body panel to get over the rear lip. Therefore, the grommet with the rear lip having a large thickness and height is suitable for the case where it penetrates the through hole of one body panel.

  Conversely, if the thickness of the rear lip is suppressed or the height of the rear lip from the fitting groove is reduced, the front lip passes through the through hole, and the body panel is locked to the rear lip to the rear side. When the portion is deformed to the inner peripheral side, the body panel can easily get over the rear lip. For this reason, a grommet with a reduced thickness or height of the rear lip is suitable for passing through the through holes of two or more body panels. However, since the resistance to the tensile force from the front side is also reduced, A means for ensuring the stability against this tensile force in the state of being fitted in the fitting groove is required.

The stability against tension from the front side as described in claim 2, the rear side of the inner circumferential projection of the outer peripheral portion, the outer periphery of the inner peripheral portion, the peripheral rear on the inner peripheral surface of the outer peripheral portion may abut It is obtained by forming the convex part in the circumferential direction.

  In this case, when the body panel is fitted in the fitting groove, the rear outer peripheral convex portion and the inner peripheral surface of the outer peripheral portion are in contact with each other in the opposite direction, and the grommet receives a tensile force from the front side. Sometimes, the inner peripheral portion moves relatively forward with respect to the outer peripheral portion, and the rear outer peripheral convex portion of the inner peripheral portion contacts the inner peripheral surface of the outer peripheral portion in the moving direction, that is, the front side. Since the rear outer peripheral convex portion is formed on the inner peripheral portion, the inner peripheral surface of the outer peripheral portion is in contact with the front side and is also in contact with the outer peripheral side from the inner peripheral side of the grommet.

  The rear outer peripheral convex portion comes into contact with the inner peripheral surface of the outer peripheral portion from the inner peripheral side of the grommet, so that the rear outer peripheral convex portion constrains deformation of the outer peripheral portion toward the inner peripheral side, and deformation of the rear lip toward the inner peripheral side. Therefore, the rear lip maintains the state of being locked to the body panel against the tensile force from the front side, and ensures the stability against coming out.

  Here, if the outer peripheral portion can expand to the outer peripheral side when the rear outer peripheral convex portion comes into contact with the inner peripheral surface, the overlapping margin of the rear lip with the body panel is large due to the rear outer convex portion contacting. Therefore, the stability with respect to the tensile force from the front side is improved. When a tensile force is applied from the front side, the rear outer peripheral convex portion is engaged with the inner peripheral surface of the outer peripheral portion forward.

  In this case, when the rear outer peripheral convex portion comes into contact with the inner peripheral surface, the outer peripheral portion expands, and the overlapping margin of the rear lip with the body panel is increased, so that the height of the rear lip from the fitting groove is increased. Although it is small, it is possible to ensure stability against pulling out when a tensile force is applied from the front side. Therefore, when the grommet passes through the through holes of two or more body panels, the grommet is attached to the second and subsequent through holes while improving the workability when the grommet completely penetrates the first through hole. It is possible to obtain stability with respect to the tensile force from the front side in the state of being damaged.

  In Claim 3, when the grommet receives a tensile force from the front side, the rear outer peripheral convex portion of the inner peripheral portion comes into contact with the inner peripheral surface of the outer peripheral portion to the front side, for example. The inner peripheral surface of the outer peripheral portion and the contact surfaces of the rear outer convex portion that are in contact with each other are inclined from the inner peripheral side to the outer peripheral side from the front side to the rear side, or For example, the surface is formed in a stepped shape having the same inclination. The inclination of the contact surface may be a flat surface or a curved surface.

  The abutting surfaces of the inner peripheral surface of the outer peripheral portion and the rear outer peripheral convex portion are inclined rearward from the inner peripheral side to the outer peripheral side from the front side to the rear side, thereby causing the rearward movement by relative movement of the inner peripheral portion with respect to the outer peripheral portion. When the outer peripheral convex portion moves forward and comes into contact with the inner peripheral surface of the outer peripheral portion, a component of a force that pushes the outer peripheral portion from the rear outer peripheral convex portion to the outer peripheral side is generated, so the outer peripheral portion is pushed outward. As a result, deformation of the outer peripheral portion (rear lip) toward the inner peripheral side is restricted.

  As described above, the body panel is fitted in the fitting groove formed in the circumferential direction on the outer peripheral portion of the grommet, but when the grommet penetrates a plurality of body panels, the grommet is other than the through-hole to be mounted. Since it completely penetrates the through hole, the resistance at the time of penetration can be reduced by setting the height of the front lip and the rear lip from the fitting groove to the same level as described in claim 5. It is.

  As shown in FIG. 5, when the height of the convex portion on the rear side is larger than the height of the convex portion on the front side, after the convex portion on the front side passes through the through hole, the convex portion on the rear side is removed from the body panel. Increased resistance. On the other hand, in claim 5, since the height of the front lip and the rear lip located on both sides of the fitting groove is approximately the same, the rear lip will pass through the through hole after the front lip passes through the through hole. In this case, the resistance received by the rear lip from the body panel is not significantly increased. The equivalent level means that it is substantially equal and includes manufacturing errors and the like.

  In claim 5, since the front lip and the rear lip have the same height, the resistance received by the rear lip is almost the same as the resistance received by the front lip. The resistance when passing through the hole becomes small, and it becomes easy to pass through. As a result, when the grommet passes through the first through hole and is inserted through the second and subsequent through holes, the grommet can easily pass through the first through hole. Grommet insertion workability is improved, and no excessive tensile force is applied to the grommet.

  The grommet according to any one of claims 1 to 5, wherein the body panel around the through hole is fitted into a fitting groove formed in the outer circumferential portion of the grommet so that the grommet is attached to the through hole. It becomes a state.

  There are cases where there are one body panel and multiple body panels. In the case of one sheet, the grommet is put on when the front lip passes through the through-hole and the body panel is locked to the rear lip. The front lip and the rear lip pass through the through-hole through which the grommet completely penetrates, the front lip passes through the through-hole in the through-hole to be inserted, and the body panel is locked to the rear lip.

  When the body panel is fitted into the grommet, the front lip is deformed to the inner circumference, so the resistance when the front lip passes through the through hole is small, so the grommet is easy to insert into the through hole and the grommet Does not give an excessive tensile force.

  In particular, when the height of the front lip and the rear lip is approximately the same, the two lips easily pass through the through-hole, so that the grommet penetrates the first through-hole and the second and subsequent through-holes pass through. Even in the case where the grommet is inserted, it is possible to improve the insertion workability of the grommet and to obtain an effect of not applying an excessive tensile force to the grommet.

  Further, an outer peripheral convex portion is formed on the inner peripheral portion, and an inner peripheral convex portion that can come into contact with the outer peripheral convex portion is formed on the outer peripheral portion on the rear side thereof, thereby ensuring a resistance force against a tensile force from the rear side. Can do. For the tensile force from the front side, increase the height of the rear lip from the fitting groove, or the inner periphery of the outer peripheral part on the outer periphery of the inner peripheral part on the rear side of the inner peripheral convex part of the outer peripheral part. It is possible to resist by forming a rear outer peripheral convex portion that can be in contact with the surface in a direction facing each other.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 includes a cylindrical inner peripheral portion 2 through which a wire harness 13 is inserted, an outer peripheral portion 3 integrated with the outer periphery thereof, and a connecting portion 4 that connects the inner peripheral portion 2 and the outer peripheral portion 3. The front lip 6 can be deformed to the inner peripheral side and can be locked to the rear side of the body panel 11 around the through hole 12, and the rear lip can be locked to the front side of the body panel 11 around the through hole 12. 7 shows a specific example of the grommet 1 in which the outer peripheral convex portion 8 and the inner peripheral convex portion 9 that can contact the inner peripheral portion 2 and the outer peripheral portion 3 are formed. The grommet 1 is formed of an elastic body such as rubber or elastomer. The vehicle body panel 11 is fitted to the outer peripheral portion 3 of the grommet 1 around a through hole 12 formed therein.

  A fitting groove 5 in which the body panel 11 around the through hole 12 is fitted is formed between the front lip 6 and the rear lip 7. The front lip 6 is formed on the outer periphery of the outer peripheral portion 3 so as to be deformable to the inner peripheral side and can be locked to the rear side of the body panel 11 around the through hole 12. The rear lip 7 is formed on the outer periphery of the outer peripheral portion 3. The body panel 11 around the through-hole 12 is formed in a state that can be locked forward. The height (wrap margin) of the front lip 6 from the fitting groove 5 is suppressed to about 3 mm or less for the purpose of reducing the resistance when the body panel 11 around the through hole 12 gets over the front lip 6.

  The outer peripheral convex portion 8 is formed in the circumferential direction on the outer periphery of the inner peripheral portion 2, and the inner peripheral convex portion 9 is formed in the circumferential direction on the inner periphery of the outer peripheral portion 3 on the rear side of the outer peripheral convex portion 8. The outer peripheral convex part 8 and the inner peripheral convex part 9 are formed in a state in which they can come into contact with each other when a tensile force acts on the inner peripheral part 2 of the grommet 1 to the rear side. The outer peripheral convex portion 8 of the inner peripheral portion 2 is formed at a position on the inner peripheral side of the connecting portion 4, and the inner peripheral convex portion 9 of the outer peripheral portion 3 is formed at a position where pressure is not applied to the outer peripheral convex portion 8 in normal times. The outer peripheral convex portion 8 and the inner peripheral convex portion 9 are continuous in the circumferential direction.

  The contact surfaces of the outer peripheral convex portion 8 and the inner peripheral convex portion 9 that contact each other are inclined from the outer peripheral side to the inner peripheral side from the front side to the rear side. Since the both contact surfaces are inclined, when a tensile force acts on the inner peripheral portion 2 backward as shown in FIG. 2B, the contact surface of the outer peripheral convex portion 8 becomes the inner peripheral convex portion 9. The contact surface is pressed toward the outer peripheral side to expand the outer peripheral portion 3, or the outer peripheral portion 3 is prevented from being deformed, and the fitting groove 5 is brought into close contact with the end surface of the body panel 11 on the through hole 12 side.

  In FIG. 1, by increasing the height (lapping margin) of the rear lip 7 from the fitting groove 5, the grommet 1 is inserted into the through hole 12 formed in one body panel 11 as shown in FIG. Although the example of manufacture of the grommet 1 suitable for making it shows is shown, a plurality of through-holes can also be penetrated by adjusting the height of the rear lip 7. In the drawing, in order to protect the inner peripheral portion 2 through which the wire harness 13 is inserted, a surrounding portion 41 continuous with the connecting portion 4 and the outer peripheral portion 3 is formed on the outer periphery of the connecting portion 4. 41 is not necessarily required.

  The connecting portion 4 has a curved shape so that the inner peripheral portion 2 and the outer peripheral portion 3 can move relative to each other in any axial direction within a certain range by a tensile force acting on the inner peripheral portion 2. The inner peripheral portion 2 can move forward with respect to the outer peripheral portion 3 until the connecting portion 4 is fully extended. It can move to the rear side until the outer peripheral convex portion 8 contacts the inner peripheral convex portion 9. Since the connecting portion 4 has a curved shape, the front lip 6 can be deformed to the inner peripheral side.

  The grommet 1 is attached to the through-hole 12 by being pushed from the engine room side or pulled from the indoor side with respect to the through-hole 12. When the grommet 1 shown in FIG. 1 passes through the through hole 12 of the single body panel 11, the front lip 6 extends from the outer peripheral surface (front surface) of the connecting portion 4 or the surrounding portion 41 as shown in FIG. When the body panel 11 comes into contact with the front lip 6 and the body panel 11 is pushed backward, the connecting portion 4 is elastically deformed together with the front lip 6 toward the inner peripheral side.

  When the front lip 6 gets over the body panel 11, the body panel 11 is fitted into the fitting groove 5, and the grommet 1 is attached to the through hole 12. At this time, the body panel 11 is locked to the front lip 6 to the front side and to the rear lip 7 to the rear side as shown by a chain line in FIG.

  When the inner peripheral portion 2 of the grommet 1 receives a tensile force in the forward direction with the grommet 1 shown in FIG. 2- (a), the rear lip 7 is engaged with the body panel 11 in the forward direction to pull it. Resist the force and maintain the mounting state in the through hole 12. The resistance force when the rear lip 7 is locked to the body panel 11 is large, and the greater the height from the fitting groove 5, the greater.

  When the inner peripheral part 2 of the grommet 1 receives a rearward pulling force in the mounted state of FIG. 2A, the inner peripheral part 2 moves relative to the rearward part relative to the outer peripheral part 3 as shown in FIG. Then, as described above, the outer peripheral convex portion 8 abuts on the inner peripheral convex portion 9 of the outer peripheral portion 3, and the outer peripheral portion 3 is expanded by pressing the inner peripheral convex portion 9 toward the outer peripheral side, or deformation of the outer peripheral portion 3 is prevented.

  The outer lip 3 is expanded or the deformation of the outer rim 3 is prevented, so that the front lip 6 is expanded or the front lip 6 is prevented from being deformed, and the front lip 6 is lapped with the body panel 11. Is sufficiently secured. As a result, the degree of close contact between the body panel 11 and the fitting groove 5 is increased, and the front lip 6 is reliably locked to the rear side with respect to the body panel 11, so that the front lip 6 is resistant to the tensile force toward the rear side. Demonstrate. As a result, the body panel 11 cannot get over the front lip 6, and the grommet 1 maintains the mounting state in the through hole 12.

  FIG. 3 shows the grommet 1 shown in FIG. The manufacture example of the grommet 1 currently formed in the direction is shown. Here, in order to give the grommet 1 a function suitable particularly when the grommet 1 passes through the through holes 12 of the two body panels 11, 11, the height of the rear lip 7 from the fitting groove 5 is set to the front. The height of the lip 6 is equal to or equal to the height of the lip 6 (about 3 mm or less).

  The inner peripheral surface 31 of the outer peripheral part 3 and the rear outer peripheral convex part 10 are formed so as to be able to contact each other in the facing direction. The abutting surfaces of the inner peripheral surface 31 of the outer peripheral portion 3 and the rear outer peripheral convex portion 10 that are in contact with each other are inclined from the inner peripheral side to the outer peripheral side from the front side to the rear side. When the inner peripheral portion 2 receives a tensile force toward the front side, the contact surface of the rear outer peripheral convex portion 10 presses the inner peripheral surface 31 of the outer peripheral portion 3 toward the outer peripheral side to expand the outer peripheral portion 3, or the outer periphery The portion 3 is prevented from being deformed and has a function of closely fitting the fitting groove 5 to the body panel 11.

  FIG. 3 shows a state in which the grommet 1 is inserted through the through holes 12 and 12 formed in the body panels 11 and 11 that are parallel to each other. The grommet 1 is a through hole 12 in the single body panel 11. In some cases, only the insertion is possible. When inserting the two body panels 11 and 11, the body panels 11 and 11 may not be mutually parallel.

  As shown in FIG. 4A, the grommet 1 shown in FIG. 3 completely penetrates the through hole 12 of the first body panel 11, and the front lip 6 passes through the through hole 12 of the second body panel 11. It is in the wearing state in the inserted state. The relationship between the body panel 11, the connecting portion 4, and the front lip 6 until the grommet 1 is in the mounted state is the same as in the case of FIG. 2- (a) (paragraphs 0043 and 0044).

  When the inner peripheral portion 2 of the grommet 1 receives a forward pulling force in the mounted state shown in FIG. 4- (a), the inner peripheral portion 2 relatively moves forward with respect to the outer peripheral portion 3, and the rear outer peripheral protrusion The contact surface of the part 10 contacts the inner peripheral surface 31 of the outer peripheral part 3 and presses the outer peripheral part 3 toward the outer peripheral side to expand it or prevent the outer peripheral part 3 from being deformed.

  The outer periphery 3 is expanded, or the deformation of the outer periphery 3 is prevented, so that the rear lip 7 is expanded or the rear lip 7 is prevented from being deformed, and the rear lip 7 is lapped with the body panel 11. Is sufficiently secured. As a result, the degree of close contact between the body panel 11 and the fitting groove 5 is increased, and the rear lip 7 is reliably locked to the front side to the body panel 11, so that the rear lip 7 is resistant to the tensile force toward the front side. Demonstrate. As a result, the body panel 11 cannot get over the rear lip 7, and the grommet 1 maintains the mounting state in the through hole 12.

  When the inner peripheral part 2 of the grommet 1 receives a rearward pulling force in the mounted state of FIG. 4- (a), the inner peripheral part 2 moves relative to the rearward part relative to the outer peripheral part 3 as shown in (b). 2- (b), the outer peripheral convex portion 8 abuts on the inner peripheral convex portion 9 of the outer peripheral portion 3 and presses the inner peripheral convex portion 9 toward the outer peripheral side to expand the outer peripheral portion 3, or the outer peripheral portion 3 Prevent deformation.

  The front lip 6 is expanded by expanding the outer peripheral part 3 or preventing the deformation of the outer peripheral part 3, and a lap allowance of the front lip 6 with the body panel 11 is sufficiently secured. Thereby, since the degree of close_contact | adherence with the body panel 11 and the fitting groove | channel 5 increases, the front lip 6 exhibits the resistance with respect to the tensile force to the back side. As a result, the body panel 11 cannot get over the front lip 6, and the grommet 1 maintains the mounting state in the through hole 12.

  Although the drawing shows an example of mounting the grommet 1 when the through-hole 12 is not burring processed, as shown in FIGS. 1 and 3, the recess 7 a is formed on the body panel 11 side surface of the rear lip 7 of the outer peripheral portion 3. By forming, the grommet 1 can be used for the through-holes 12 that are burring processed.

It is sectional drawing which showed the manufacture example of the grommet suitable for the through-hole of the body panel of 1 sheet structure. (A) is sectional drawing which showed the condition at the time of mounting | wearing with a grommet to a through-hole, (b) is sectional drawing which showed a mode when the grommet in a mounting state received tensile force to the back side. It is sectional drawing which showed the manufacture example of the grommet suitable for the through-hole of the body panel of a 2 sheet structure. (A) is sectional drawing which showed a mode when the grommet in the mounting state received the tensile force from the front side, (b) showed a mode when the grommet in the mounting state received the tensile force from the back side. It is sectional drawing. It is sectional drawing which showed the manufacture example of the conventional grommet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ......... Grommet 2 ......... Inner peripheral part 3 ......... Outer peripheral part 4 ......... Connecting part 41 ... Enveloping part 5 ......... Fitting part 6 ......... Front lip 7 ......... Rear lip 7a ... ... concave part 8 ... outer peripheral convex part 9 ... inner peripheral convex part 10 ... rear outer peripheral convex part 11 ... body panel 12 ... through hole 13 ... wire harness

Claims (5)

A cylindrical inner peripheral portion through which the wire harness is inserted, an outer peripheral portion integrated with the outer periphery thereof, and a connecting portion that connects the inner peripheral portion and the outer peripheral portion, and a body panel of a vehicle is formed on the outer peripheral portion. In the grommet that fits around the made through hole,
The outer peripheral portion is deformable to the inner peripheral side, and a front lip that can be locked rearward to a body panel around the through hole; and
A rear lip that can be locked forward on the body panel around the through hole;
An outer peripheral convex portion is formed in the circumferential direction on the outer periphery of the inner peripheral portion,
On the inner periphery of the outer peripheral portion on the rear side of the outer peripheral convex portion, an inner peripheral convex portion that can come into contact with the outer peripheral convex portion is formed in the circumferential direction .
Each of the contact surfaces of the outer peripheral convex portion and the inner peripheral convex portion that are in contact with each other is inclined from the front side to the rear side toward the inner peripheral side from the outer peripheral side . Claim 1, characterized in that the rear side, the outer periphery of the inner peripheral portion, the rear outer convex section that can be brought into contact with the inner peripheral surface of the outer peripheral portion is formed in the circumferential direction from the inner circumferential projection part of the outer peripheral portion Grommet described in. A cylindrical inner peripheral portion through which the wire harness is inserted, an outer peripheral portion integrated with the outer periphery thereof, and a connecting portion that connects the inner peripheral portion and the outer peripheral portion, and a body panel of a vehicle is formed on the outer peripheral portion. In the grommet that fits around the made through hole,
The outer peripheral portion is deformable to the inner peripheral side, and a front lip that can be locked rearward to a body panel around the through hole; and
A rear lip that can be locked forward on the body panel around the through hole;
An outer peripheral convex portion is formed in the circumferential direction on the outer periphery of the inner peripheral portion,
On the inner periphery of the outer peripheral portion on the rear side of the outer peripheral convex portion, an inner peripheral convex portion that can come into contact with the outer peripheral convex portion is formed in the circumferential direction.
A grommet characterized in that a rear outer peripheral convex portion that can come into contact with an inner peripheral surface of the outer peripheral portion is formed in a circumferential direction on the outer periphery of the inner peripheral portion on the rear side of the inner peripheral convex portion of the outer peripheral portion.   The inner peripheral surface of the outer peripheral portion and the contact surfaces of the rear outer peripheral convex portion that are in contact with each other are inclined from the inner peripheral side to the outer peripheral side from the front side to the rear side. Item 4. The grommet according to item 3.   The fitting groove into which the body panel is fitted is formed in the outer circumferential portion in the circumferential direction, and the height of the front lip and the rear lip from the fitting groove is approximately the same. 3 or the grommet according to claim 4.

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