JP2007189839A - Grommet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grommet for preventing an outer member comprising an elastic material from being elastically deformed, preventing the outer member from being removed from an inner member, and preventing the outer member from being removed from a panel along with the inner member after an installation to the panel. <P>SOLUTION: The grommet 1 includes a grommet body 5 comprising the elastic material, and an inner protector 6 comprising a synthetic resin. The grommet body 5 is attached to the inner protector 6, attached to the panel 2 along with the inner protector 6, and maintains a water-tightness between the panel 2. The grommet body 5 is provided with a parallel wall 10 along the panel 2. The inner protector 6 is provided with an overlap wall 21 for entirely overlapping the parallel wall 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a grommet that is attached by penetrating a wire harness through a panel constituting a vehicle body or the like of an automobile.

  When routing a wire harness through a panel of an automobile as a vehicle, various grommets (for example, Patent Documents 1 to 5) have been conventionally used in order to prevent liquid such as water from adhering to the wire harness. Have been used).

  A conventional grommet includes a protector as an inner member made of a synthetic resin that is hard (substantially elastically deformed) and a grommet body made of an elastic material such as rubber. The protector is formed in a ring shape and passes the wire harness inside. The protector is locked in the hole provided in the panel described above.

  The grommet body connects the engaging portion that engages with the outer periphery of the protector, the tubular portion that passes the wire harness inside, the parallel portion that is formed flat along the panel and connects the engaging portion and the tubular portion. It is equipped with a wall part. Further, the grommet body is provided with a lip or the like that keeps water tightly between the above-described panels.

The grommet having the above-described configuration is attached to the panel by being locked in the above-described hole in a state where the protector and the grommet body are assembled to each other and the wire harness is passed therethrough. Thus, the grommet prevents liquid such as water from the outside from adhering to the wire harness.
JP 2003-319536 A JP 2003-319535 A JP 2003-180019 A Japanese Patent Laid-Open No. 9-93760 Japanese Utility Model Publication No. 5-23354

  In the grommet described above, since the protector as the inner member is formed in an annular shape, there is no member that supports the entire parallel wall portion of the grommet body as the outer member. For this reason, when the parallel wall or the like is pressed by an operator or another article, the grommet is elastically deformed and the grommet body falls off the protector, or the protector is elastically deformed together with the grommet body. Then dropped off the panel.

  Accordingly, an object of the present invention is to prevent the outer member made of an elastic material from being elastically deformed after being attached to the panel, and to drop off from the inner member or from the inner member per panel. It is to provide a grommet that can be prevented.

  In order to solve the above-mentioned problems and achieve the object, the grommet according to the present invention according to claim 1 is an inner member made of a synthetic resin and an inner member made of an elastic material and attached to the inner member. And an outer member that is attached to the panel and keeps watertight between the panel and a grommet that passes the wire harness, and the outer member is provided with a parallel wall portion along the panel, The inner member is provided with an overlapping portion that overlaps the entire parallel wall portion.

  A grommet according to a second aspect of the present invention is the grommet according to the first aspect, wherein one end of the inner member is pivotally connected to each other by a hinge and is locked to the other end. A pair of rotating members provided with stop portions are provided, and the overlapping portion is provided in each of the pair of rotating members.

  A grommet according to a third aspect of the present invention is the grommet according to the second aspect, wherein the grommet according to the second aspect includes an outer wall provided at an overlapping portion of one rotating member and overlapping the parallel wall portion, and the other rotating member. The reinforcing portion includes an inner wall portion that is provided in the overlapping portion and overlaps the outer wall portion when the locking portions of the pair of rotating members are locked to each other.

  A grommet according to a fourth aspect of the present invention is the grommet according to the third aspect, wherein one rotating member of the pair of rotating members includes an outer wall portion of one reinforcing portion and the one reinforcing member. And an inner wall portion of another reinforcing portion adjacent to the first reinforcing portion, and the other rotating member includes an inner wall portion of the one reinforcing portion and the other reinforcing portion adjacent to the one reinforcing portion. An outer wall portion is provided.

The grommet according to a fifth aspect of the present invention is the grommet according to the fourth aspect, wherein the pair of rotating members are provided with a through portion through which the wire harness is passed while the locking portions are locked to each other. And the plurality of reinforcing portions are arranged in a straight line from the through portion,
The distance between the inner wall portion and the outer wall portion of the reinforcing portion closest to the through portion in the state where the locking portions of the pair of rotating members are released is the locking portion of the pair of rotating members. It is characterized by being formed narrower than the width of the through portion in a state where they are locked together.

  According to the grommet of the present invention as set forth in claim 1, the overlapping portion that overlaps the entire parallel wall portion of the outer member made of an elastic material is provided in the inner member made of synthetic resin. For this reason, even if it presses a parallel wall part, this parallel wall part is supported by the overlap part, and it can prevent that this parallel wall part, ie, an outer member, elastically deforms.

  According to the grommet of the present invention described in claim 2, since the inner member includes a pair of rotating members that are rotatably connected to each other by a hinge, the rotating members are rotated (a pair of rotations). By opening and closing between the moving members), the wire harness can be easily positioned between the pair of rotating members, and the inner member can be easily attached to the outer periphery of the wire harness.

  Moreover, since the overlapping part is provided in each rotation member, the whole parallel wall part can be reliably supported by the overlapping part.

  According to the grommet of the present invention described in claim 3, the outer wall portion is provided on one rotating member, and the inner wall portion overlapping the outer wall portion is provided on the other rotating member. Since the portion is supported by the outer wall portion and the inner wall portion, the parallel wall portion can be reliably supported by both the pair of rotating members.

  According to the grommet of the present invention described in claim 4, one rotating member is provided with an outer wall portion and an inner wall portion in order, and the other rotating member has an inner wall portion and an outer wall portion. Since they are provided in order, the rotating members support each other when the parallel wall portions are pressed. For this reason, the rotating member, that is, the overlapping portion itself is further hardly deformed.

  According to the grommet of the present invention described in claim 5, the interval between the inner wall portion and the outer wall portion of the reinforcing portion closest to the through portion is larger than the width of the through portion when the engaging portions are engaged with each other. Therefore, it is possible to prevent the wire harness inserted into the through portion between the pair of rotating members from being unexpectedly dropped from between the rotating members before the locking portions are locked to each other.

  As described above, according to the first aspect of the present invention, even when the parallel wall portion is pressed, the entire parallel wall portion is supported by the overlapping portion, so that the parallel wall portion, that is, the outer member is elastically deformed. Can be prevented. For this reason, the outer member can be prevented from elastically deforming even when the parallel wall portion is pressed, the outer member can be prevented from falling off the inner member, and the grommet can be prevented from falling off from each panel of the inner member. it can.

  According to the second aspect of the present invention, since the inner member can be easily attached to the outer periphery of the wire harness, the grommet can be easily attached to the wire harness.

  Moreover, since the overlapping part is provided in each of the rotating members, the entire parallel wall part can be reliably supported by the overlapping part, so that it is possible to reliably prevent the parallel wall part, that is, the outer member from being elastically deformed.

  According to the third aspect of the present invention, since the parallel wall portion can be reliably supported by both of the pair of rotating members, the overlapping portion itself is more difficult to be deformed, and particularly the elastic deformation of the parallel wall portion of the outer member. Can be prevented more reliably.

  According to the fourth aspect of the present invention, since the rotating members support each other when the overlapping portion is pressed, the rotating member, that is, the overlapping portion itself is further hardly deformed. Therefore, the elastic deformation of the outer member, particularly the parallel wall portion, can be prevented more reliably.

  According to the fifth aspect of the present invention, the wire harness inserted into the through portion between the pair of rotating members can be prevented from unexpectedly dropping between the rotating members before the locking portions are locked. The grommet can be attached to the wire harness more easily.

  Hereinafter, a grommet according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4. A grommet 1 (shown in FIG. 1 and the like) according to an embodiment of the present invention is attached to a panel 2 (shown in FIG. 2) that constitutes the body of an automobile as a vehicle.

  As shown in FIGS. 1 and 2, the grommet 1 is routed through the wire harness 4 that is routed inside the automobile and passes through the hole 3 provided in the panel 2. The grommet 1 keeps water tightness between the panel 2 and prevents moisture (liquid) such as water from entering the inside from the space between the panel 2, and moisture (liquid) such as water enters the wire harness 4. ) Is prevented.

  As shown in FIGS. 1 and 2, the grommet 1 includes a grommet main body 5 as an outer member and an inner protector 6 as an inner member.

  The grommet body 5 is composed of an elastically deformable elastic material such as rubber. The grommet body 5 is integrally provided with a body portion 7, a flange portion 8, and a harness through tube 9. The main body portion 7 includes a disk-like parallel wall portion 10 and a cylindrical tube portion 11 erected from the outer edge of the parallel wall portion 10. A flange portion 19 (described later) of the inner protector 6 enters the inner surface of the end portion of the cylindrical portion 11 on the side away from the parallel wall portion 10, and a fitting receiving groove 12 to which the inner protector 6 is attached is formed on the entire circumference. It is provided over. Of course, the fitting receiving groove 12 is recessed from the inner surface of the cylindrical portion 11.

  The flange portion 8 protrudes in the outer circumferential direction from the end portion of the tube portion 11 on the side away from the parallel wall portion 10 over the entire circumference of the tube portion 11. Further, when the grommet body 5 is attached to the inner protector 6 and attached to the panel 2 together with the inner protector 6, the inner peripheral lip 13 and the outer peripheral lip 14 that are in close contact with the panel 2 are attached to the flange portion 8. Is provided over the entire circumference. The inner peripheral lip 13 is formed as a protrusion protruding from the outer surface of the flange portion 8 toward the panel 2 described above. The outer peripheral lip 14 is disposed on the outer peripheral side of the flange portion 8 with respect to the inner peripheral lip 13, and is formed to protrude from the outer surface of the flange portion 8 toward the panel 2 described above. The outer peripheral lip 14 gradually extends in the direction toward the outer periphery of the flange portion 8 as its cross-sectional shape approaches the panel 2.

  The harness through tube 9 is formed in a cylindrical shape, and one end of the harness through tube 9 is connected to the main body 7. The harness through tube 9 communicates the inside and outside of the main body 7. That is, the harness through tube 9 passes through the main body 7. The longitudinal direction of the harness through tube 9 is parallel to the parallel wall portion 10. The harness threading tube 9 passes the wire harness 4 inside thereof.

  The grommet body 5 having the above-described configuration is attached to the above-described panel 2 together with the inner protector 6 in a state where the inner protector 6 is attached and the wire harness 4 is passed through the harness through tube 9. Then, the surface of the parallel wall portion 10 of the main body portion 7 of the grommet main body 5 becomes parallel to the surface of the panel 2. That is, the parallel wall portion 10 of the main body portion 7 of the grommet main body 5 is along the panel 2. Further, the longitudinal direction of the wire harness 4 led to the outside from the harness through tube 9 of the grommet body 5 is parallel to both the parallel wall portion 10 and the panel 2 described above.

  The inner protector 6 is made of an insulating and hard synthetic resin. The hard synthetic resin constituting the inner protector 6 referred to in the present invention is a material that hardly undergoes elastic deformation or has a much smaller amount of elastic deformation than the elastic material that constitutes the grommet body 5.

  As shown in FIGS. 1 and 3, the inner protector 6 includes a pair of rotating members 15, a locking portion 16, and a plurality of reinforcing portions 17. The rotating member 15 includes a main body portion 18, a flange portion 19, and a panel locking protrusion 20. The main body portion 18 includes a semicircular overlapping wall 21 as an overlapping portion, and a standing wall 22 erected from an arcuate edge of the overlapping wall 21. The overlapping wall 21 is formed in a size that overlaps the entire parallel wall portion 10 of the grommet body 5 attached to the inner protector 6 when the locking portions 16 described later are locked. The standing wall 22 is provided over the entire length of the arcuate edge of the overlapping wall 21. The flange portion 19 extends from the outer surface of the standing wall 22 toward the outer periphery of the main body portion 18.

  The panel locking projection 20 is formed in a convex shape from the outer surface of the end portion of the standing wall 22 on the side away from the overlapping wall 21. The panel locking projection 20 is locked to the panel 2 with the panel 2 sandwiched between the lips 13 and 14 of the grommet body 5.

  The pair of rotating members 15 are arranged in a state in which the linear portions of the overlapping wall 21 of the main body portion 18 face each other, and one end portions of the pair of rotating members 15 are connected by a hinge 23. The hinge 23 is formed in the shape of a piece in which both ends in the longitudinal direction are formed integrally with both of the pair of rotating members 15. The hinge 23 is formed thinner than the thickness of the pair of rotating members 15 and is elastically deformable. It has become. One end of the pair of rotating members 15 is rotatably connected to each other by the elastically deformable hinge 23. For this reason, when the hinge 23 is elastically deformed, particularly the other end portions of the pair of rotating members 15 are brought into contact with each other (approaching or moving away from each other).

  The locking portion 16 is provided at the other end of each of the pair of rotating members 15 and can be locked and detached from each other. The locking portion 16 of one rotating member 15 (hereinafter denoted by reference numeral 15a) located on the near side in FIGS. 1 and 3 is the other rotating member located on the back side in FIGS. It is formed in an arm shape extending toward 15 (hereinafter denoted by reference numeral 15b). The locking portion 16 of the other rotating member 15b is a concave groove that can be locked by the locking portion 16 of the one rotating member 15a entering.

  Further, the pair of rotating members 15a and 15b described above are formed with through holes 24 as through portions for allowing the wire harness 4 to pass therethrough while the locking portions 16 are locked to each other. The through hole 24 is provided at one end near the hinge 23 of each of the rotating members 15a and 15b. The through hole 24 is formed by cutting out a part of the overlapping wall 21 from the edge of the overlapping wall 21 of each of the rotating members 15 a and 15 b toward the standing wall 22 so as to be recessed.

  In the illustrated example, two reinforcing portions 17 are provided. These two reinforcing portions 17 are provided at the edge of the overlapping wall 21 adjacent to each other of the pair of rotating members 15a and 15b. Further, the two reinforcing portions 17 are juxtaposed along the edge of the overlapping wall 21. That is, the two reinforcing portions 17 are arranged side by side along the edge of the overlapping wall 21 along the direction in which the two reinforcing portions 17 are in contact with and away from the through hole 24. As described above, the two reinforcing portions 17 are arranged on a straight line extending from the through hole 24.

  The reinforcing portion 17 includes an outer wall portion 25 and an inner wall portion 26 that overlap each other when the locking portions 16 of the pair of rotating members 15a and 15b are locked to each other. The outer side wall part 25 and the inner side wall part 26 are each formed in a flat plate shape. The outer wall portion 25 and the inner wall portion 26 of each reinforcing portion 17 are provided at the edge of the overlapping wall 21 of the rotating members 15a and 15b different from each other.

  In the illustrated example, the inner wall portion 26 of the reinforcing portion 17 on the side away from the through hole 24 of the two reinforcing portions 17 is provided at the edge of the overlapping wall 21 of the one rotating member 15a described above. The outer wall portion 25 of the reinforcing portion 17 on the side away from 24 is provided at the edge of the overlapping wall 21 of the other rotating member 15b described above. Of the two reinforcing portions 17, the inner wall portion 26 of the reinforcing portion 17 near the through hole 24 is provided at the edge of the overlapping wall 21 of the other rotating member 15 b described above. The outer side wall portion 25 is provided at the edge of the overlapping wall 21 of the one rotating member 15a described above. Further, both surfaces of the inner wall portion 26 and the outer wall portion 25 are parallel to the overlapping wall 21. Further, when the locking portions 16 of the rotating members 15 a and 15 b are locked, the outer wall portion 25 naturally overlaps the parallel wall portion 10 of the grommet body 5.

  As described above, the overlapping wall 21 of one rotating member 15a is provided with the outer wall portion 25 overlapping the parallel wall portion 10, and the overlapping wall 21 of the other rotating member 15b is provided with the inner wall portion 26. Yes. Furthermore, one rotating member 15 a is provided with an outer wall portion 25 of one reinforcing portion 17 and an inner wall portion 26 of another reinforcing portion 17 adjacent to the one reinforcing portion 17. The rotating member 15 b is provided with an inner wall portion 26 of the one reinforcing portion 17 and an outer wall portion 25 of the other reinforcing portion 17 adjacent to the one reinforcing portion 17.

  Further, in the grommet 1 described above, the inner wall portion 26 of the reinforcing portion 17 closest to the through hole 24 in the state where the locking portions 16 are unlocked and the hinge 23 is positioned in a neutral state where the hinge 23 is not elastically deformed. As shown in FIG. 4, the distance D between the outer wall portion 25 and the outer wall portion 25 is formed to be narrower than the width H of the through hole 24 in a state where the locking portions 16 are locked.

  The grommet 1 described above is assembled as follows. The wire harness 4 is positioned in the recess that forms the through hole 24 of the rotating members 15a and 15b of the inner protector 6, and the locking portions 16 provided at the other ends of the rotating members 15a and 15b are engaged with each other. Stop. And the main-body part 7 of the grommet main body 5 is expanded, and it covers the main-body part 7 inner protector 6 of this grommet main body 5 so that the parallel wall part 10 may overlap the overlapping wall 21. FIG. And the flange part 19 of the inner protector 6 is inserted in the fitting receiving groove 12 of the grommet main body 5, and the grommet main body 5 is covered on the inner protector 6, and these are fixed. Further, the wire harness 4 is passed through the harness through tube 9.

  Thus, the grommet 1 having the above-described configuration is assembled. Then, the inner protector 6 is pressed into the hole 3 provided in the panel 2 together with the grommet body 5 from the panel locking projection 20 side. Then, the panel 2 is sandwiched between the panel locking projection 20 and the lips 13 and 14, and the grommet 1 is fixed to the panel 2.

  According to the present embodiment, the overlapping wall 21 that overlaps the entire parallel wall portion 10 of the grommet body 5 made of an elastic material is provided in the inner protector 6 made of synthetic resin. For this reason, even if the parallel wall part 10 is pressed, the parallel wall part 10 is supported by the overlapping wall 21 and the parallel wall part 10, that is, the grommet body 5 can be prevented from being elastically deformed. For this reason, even if the parallel wall part 10 is pressed, the grommet body 5 can be prevented from elastically deforming, and the grommet body 5 can be prevented from falling off from the inner protector 6. 2 can be prevented from falling off.

  Since the inner protector 6 includes a pair of rotating members 15a and 15b that are rotatably connected to each other by the hinge 23, the rotating members 15a and 15b are rotated (between the pair of rotating members 15a and 15b). The wire harness 4 can be easily positioned between the pair of rotating members 15 a and 15 b, and the inner protector 6 can be easily attached to the outer periphery of the wire harness 4. Therefore, the grommet 1 can be easily attached to the wire harness 4.

  Moreover, since the overlapping wall 21 is provided in each of the rotation members 15a and 15b, the entire parallel wall part 10 can be reliably supported by the overlapping wall 21. Therefore, it is possible to reliably prevent the parallel wall portion 10, that is, the grommet body 5 from being elastically deformed.

  Since one rotation member 15a is provided with an outer wall portion 25 and the other rotation member 15b is provided with an inner wall portion 26 that overlaps the outer wall portion 25, the parallel wall portion 10 is connected to the outer wall portion 25 and the inner wall portion 25. Since it is supported by the wall portion 26, the parallel wall portion 10 can be reliably supported by both the pair of rotating members 15a and 15b. Therefore, the overlapping wall 21 itself is more difficult to deform, and the elastic deformation of the grommet body 5, particularly the parallel wall portion 10, can be more reliably prevented.

  One rotating member 15a is provided with an outer wall portion 25 and an inner wall portion 26 in this order, and the other rotating member 15b is provided with an inner wall portion 26 and an outer wall portion 25 in this order. When the wall 21 is pressed, the rotating members 15a and 15b support each other. For this reason, the rotating members 15a and 15b, that is, the overlapping wall 21 itself and the deformation are further difficult. Therefore, elastic deformation of the grommet body 5, particularly the parallel wall portion, can be prevented more reliably.

  Since the distance D between the inner wall portion 26 and the outer wall portion 25 of the reinforcing portion 17 closest to the through hole 24 is narrower than the width H of the through hole 24 in a state where the locking portions 16 are locked together, It is possible to prevent the wire harness 4 inserted into the through hole 24 through between the rotating members 15a and 15b from being accidentally dropped from between the rotating members 15a and 15b before the locking portions 16 are locked. Therefore, the grommet 1 can be attached to the wire harness 4 more easily.

  In the embodiment described above, two reinforcing portions 17 are provided. However, in the present invention, only one reinforcing portion 17 may be provided, or three or more reinforcing portions 17 may be provided. In the above-described embodiment, the outer wall portion 25 and the inner wall portion 26 are provided on each of the rotating members 15a and 15b. However, in the present invention, only one of the outer wall portion 25 and the inner wall portion 26 may be provided on one rotating member 15a, and only the other may be provided on the other rotating member 15b. Furthermore, in the present invention, it is needless to say that the overlapping wall 21 may be provided only in any one of the rotating members 15a and 15b.

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

It is a perspective view which decomposes | disassembles and shows the grommet concerning one Embodiment of this invention. It is sectional drawing of the state which attached the panel to the grommet shown by FIG. It is a perspective view of the inner protector of the grommet shown in FIG. It is a top view of the inner protector of the grommet shown in FIG.

Explanation of symbols

1 Grommet 2 Panel 4 Wire harness 5 Grommet body (outer member)
6 Inner protector (inner member)
DESCRIPTION OF SYMBOLS 10 Parallel wall part 15 Rotating member 15a One rotating member 15b The other rotating member 16 Locking part 17 Reinforcing part 21 Overlapping wall (overlapping part)
24 Through hole (through part)
25 Outer wall portion 26 Inner wall portion D Distance between outer wall portion and inner wall portion H Width of through hole (through portion)

Claims (5)

An inner member made of synthetic resin;
An outer member that is made of an elastic material and is attached to the inner member and attached to the panel together with the inner member to keep watertight between the panel and a grommet that passes the wire harness;
The outer member is provided with a parallel wall portion along the panel,
The grommet, wherein the inner member is provided with an overlapping portion that overlaps the entire parallel wall portion. The inner member includes a pair of rotating members in which one end portions are rotatably connected to each other by a hinge and a locking portion that is locked to the other end portion is provided.
The grommet according to claim 1, wherein the overlapping portion is provided in each of the pair of rotating members.   When the outer wall provided in the overlapping part of one rotating member and overlapping the parallel wall part and the engaging part of the pair of rotating members provided in the overlapping part of the other rotating member are locked together, The grommet according to claim 2, further comprising a reinforcing portion having an inner wall portion overlapping the outer wall portion. One rotating member of the pair of rotating members is provided with an outer wall portion of one reinforcing portion and an inner wall portion of another reinforcing portion adjacent to the one reinforcing portion,
4. The other rotating member is provided with an inner wall portion of the one reinforcing portion and an outer wall portion of the other reinforcing portion adjacent to the one reinforcing portion. The grommet described. The pair of rotating members is provided with a through portion through which the wire harness is passed in a state where the locking portions are locked to each other.
The plurality of reinforcing portions are arranged in a straight line from the through portion, and the inner wall of the reinforcing portion closest to the through portion in a state where the engaging portions of the pair of rotating members are released from each other 5. The grommet according to claim 4, wherein an interval between the first wall portion and the outer wall portion is narrower than a width of the through portion in a state where the locking portions of the pair of rotating members are locked to each other. .

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