JP2016010165A - Grommet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grommet which achieves excellent assemblability and secures high sealability between a panel and a wire harness.SOLUTION: A grommet 10 is provided around a wire harness WH inserted into an opening part of a panel in a water-tight manner, is fixed to the panel with a seal surface 12a closely contacting with the panel to seal a gap between the panel and the wire harness WH, and is formed by an elastic material. The grommet 10 includes an inner member 13 which comprises inner split bodies 13A, 13B split in a circumferential direction and locks an end part of the opening part. The elastic material is integrally molded with the wire harness WH so as to cover the wire harness WH and the inner member 13 in a state where the inner split bodies 13A, 13B of the inner member 13 are disposed around the wire harness WH.

Description

  The present invention relates to a grommet that seals between a wire harness passed through an opening of a panel and the opening.

  A grommet is used as a member that seals between the opening of the panel and the wire harness that passes through the opening. The grommet includes a seal member formed of an elastic material and an inner member that is a rigid member, and the inner member is locked to an edge portion of the opening of the panel so that the seal member is in close contact with the panel. Yes (see, for example, Patent Document 1).

JP2013-154696A

  By the way, said grommet is provided with the opening part along an axial direction, and it can be mounted | worn from the side with respect to a wire harness by opening in this opening part.

  Thus, in the grommet provided with the opening along the axial direction, when an external force such as a pulling force is applied to the wire harness, the opening is widened by the external force, and the sealing performance may be deteriorated.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a grommet that is excellent in assemblability and that can ensure high sealing performance between the panel and the wire harness. There is.

In order to achieve the above-described object, the grommet according to the present invention is characterized by the following (1) to (5).
(1) It is provided in a watertight manner around the wire harness inserted through the opening of the panel, and is fixed to the panel in a state in which a sealing surface is in close contact with the panel. A grommet made of an elastic material that seals between
An inner member configured by a plurality of divided bodies divided in the circumferential direction and locking the edge of the opening;
The grommet, wherein the elastic material is integrally formed on the wire harness so as to cover the wire harness and the inner member in a state where the divided body of the inner member is arranged around the wire harness.
(2) The grommet according to (1), wherein the inner member is configured by a pair of the divided bodies divided in half.
(3) The grommet according to (2), wherein one end of each of the pair of divided bodies is hinged.
(4) The grommet according to (3), wherein an engagement portion that engages with each other is provided on the other end of the pair of divided bodies.
(5) The grommet according to any one of (1) to (4), wherein the inner member has a flange portion projecting outward in the circumferential direction.

In the grommet having the configuration (1), an elastic material is integrally formed on the wire harness so as to cover the wire harness and the inner member in a state where the divided member of the inner member is disposed around the wire harness. Therefore, unlike the grommet provided with the opening along the axial direction, there is no risk that the external portion such as a pulling force acts on the wire harness to expand the opening and reduce the sealing performance. That is, it is possible to reliably prevent water from entering from the surroundings and ensure high sealing performance between the panel and the wire harness.
Also, by placing the inner member divided body around the wire harness and forming it, for example, after attaching it to a wire harness with connectors connected to both ends, it is provided on the wire harness immediately before the process of attaching to the panel Can do. This eliminates the need to insert the wire harness into the insertion hole compared to a grommet that requires a complicated operation of opening the insertion hole with a jig and allowing the wire harness to pass through, and after attaching the grommet. The movement of the process due to the connector connection process and the like can be eliminated, the restriction of the work procedure can be relaxed, and the workability can be improved.
In the grommet having the configuration (2), the inner member can be easily disposed around the wire harness by sandwiching the divided body with the wire harness interposed therebetween, and workability can be improved.
In the grommet configured as described above (3), the inner member can be easily disposed around the wire harness by rotating the divided body around the hinge joint and sandwiching the wire harness. Workability can be improved.
In the grommet having the configuration (4), the divided bodies can be maintained in a state of abutting each other. Thereby, the state which made the inner member mount | wear with a wire harness can be maintained by abutting a division body on both sides of a wire harness.
In the grommet having the configuration (5), the coupling force between the inner member and the elastic material can be increased, and even when an external force such as a tensile force is generated in the wire harness, the integrity with the inner member is reliably maintained. In addition, high sealing performance can be obtained.

  ADVANTAGE OF THE INVENTION According to this invention, the grommet which is excellent in an assembly | attachment property and can ensure the high sealing performance between a panel and a wire harness can be provided.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

FIG. 1 is a perspective view of the grommet according to the present embodiment as viewed from below. FIG. 2 is a perspective view seen from above the grommet according to the present embodiment. FIG. 3 is a cross-sectional view of the grommet according to the present embodiment. FIG. 4 is a perspective view of the grommet according to the present embodiment viewed in cross section. FIG. 5 is a perspective view of an inner member provided in the grommet. FIG. 6 is a perspective view of the inner member in a state where the space between the inner divided bodies is opened. FIG. 7 is a diagram showing a manufacturing process of the grommet according to the present embodiment, and (a) to (e) are schematic perspective views in the respective processes.

Hereinafter, an example of an embodiment according to the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of the grommet according to the present embodiment as viewed from below. FIG. 2 is a perspective view seen from above the grommet according to the present embodiment. FIG. 3 is a cross-sectional view of the grommet according to the present embodiment. FIG. 4 is a perspective view of the grommet according to the present embodiment viewed in cross section.

  As shown in FIG. 1, the grommet 10 according to the present embodiment is fixed to a panel P of a vehicle such as an automobile. The grommet 10 is formed from an elastic material such as rubber or elastomer. An opening 1 is formed in the panel P, and a wire harness WH such as a battery cable is inserted through the opening 1. Thereby, the wire harness WH is wired over the front and back of the panel P.

  As shown in FIGS. 2 to 4, the grommet 10 is formed in a circular shape in plan view. The grommet 10 has a harness mounting part 11 and a panel mounting part 12. The grommet 10 is integrally formed around the wire harness WH.

  The harness mounting portion 11 is provided in a watertight manner around the exterior 20 of the wire harness WH, and is sealed from the exterior 20 of the wire harness WH.

  The panel mounting part 12 is formed in a concave shape, and an inner member 13 is provided inside thereof. The opposite side of the panel mounting part 12 from the harness mounting part 11 is a seal surface 12a having a plurality of pleated packings 14 formed therein. The seals 14 on the seal surface 12a are provided at intervals in the radial direction. Each packing 14 has a larger inner diameter than the opening 1 of the panel P.

  The inner member 13 is formed of a resin material such as plastic, and is provided integrally with the grommet 10.

  The inner member 13 is formed in a bottomed cylindrical shape having a cylindrical portion 15 and a bottom plate portion 16, and a communication hole 16 a through which the wire harness WH can be inserted is formed at the center of the bottom plate portion 16. Yes.

  The cylindrical portion 15 has an outer diameter slightly smaller than the opening 1 of the panel P. On the outer periphery of the tubular portion 15, a plurality of locking claws 17 are formed in the vicinity of the edge on the opposite side to the bottom plate portion 16. These locking claws 17 are arranged at intervals in the circumferential direction.

FIG. 5 is a perspective view of an inner member provided in the grommet. FIG. 6 is a perspective view of the inner member in a state where the space between the inner divided bodies is opened.
As shown in FIGS. 5 and 6, the inner member 13 is divided in half by a plane passing through its axis, and is divided into a pair of inner divided bodies (divided bodies) 13A and 13B. One end of each of the pair of inner divided bodies 13A and 13B is hinged. A claw portion 21 is formed at the other end of one inner divided body 13A, and this claw portion 21 engages with an engagement hole (not shown) formed at the other end of the other inner divided body 13B. To do. Accordingly, the inner divided bodies 13A and 13B are maintained in a state where they are abutted with each other. Thus, the inner member 13 has the engaging part which consists of the nail | claw part 21 and the engagement hole which maintain the inner division bodies 13A and 13B in the state which faced | matched by mutually engaging.

  The bottom plate portion 16 of each inner divided body 13A, 13B is formed with a concave portion 22 at an opposed position, and the inner divided bodies 13A, 13B are abutted with each other to form a communication hole 16a. Is done.

  In addition, the inner member 13 has a flange portion 18 that protrudes outward in the circumferential direction on the outer peripheral surface of the cylindrical portion 15. A plurality of hole portions 19 are formed in the flange portion 18 at intervals.

  In order to mount the grommet 10 on the panel P of the vehicle, one end side of the wire harness WH is inserted into the opening 1 formed in the panel P, and then the sealing surface 12a of the panel mounting portion 12 of the grommet 10 is inserted into the opening 1. And the tubular portion 15 of the inner member 13 is fitted into the opening 1.

  In this way, the packing 14 formed on the seal surface 12a of the panel mounting portion 12 of the grommet 10 is in close contact with the panel P while being elastically deformed, and the locking claw formed on the cylindrical portion 15 of the inner member 13 17 enters the back side of the panel P and locks the edge of the opening 1. Thereby, the grommet 10 is fixed to the panel P in a state where the packing 14 is in close contact with the panel P. Thereby, the space between the wire harness WH and the panel P is made watertight by the grommet 10.

Next, a case where the grommet 10 is molded will be described.
FIG. 7 is a diagram showing a manufacturing process of the grommet according to the present embodiment, and (a) to (e) are schematic perspective views in the respective processes.

  As shown in FIG. 7A, the inner member 13 is mounted at a predetermined position on the exterior 20 of the wire harness WH, and the exterior 20 of the wire harness WH is inserted into the communication hole 16a. Here, the inner member 13 is composed of half-divided inner divided bodies 13A and 13B. Therefore, the inner member 13 can be easily attached to the exterior 20 of the wire harness WH by assembling these inner divided bodies 13A and 13B so as to sandwich the exterior 20 of the wire harness WH.

  In order to attach the inner member 13 to the exterior 20 of the wire harness WH, first, the inner divided bodies 13A and 13B are rotated about the hinged end portions and separated. In this state, the outer sheath 20 of the wire harness WH is disposed in the concave portion 22 on one side of the inner divided bodies 13A and 13B. Next, the inner divided bodies 13A and 13B are rotated around the hinge joint and are put together with the wire harness WH interposed therebetween, and the claw portions 21 of the inner divided body 13A are engaged with the engagement holes of the inner divided body 13B. In this way, the inner divided bodies 13A and 13B are maintained in a state of being abutted with each other.

  Further, in this state, the recesses 22 of the inner divided bodies 13A and 13B are joined together to form a communication hole 16a, and the exterior 20 of the wire harness WH is inserted into the communication hole 16a. Thereby, the inner member 13 composed of the inner divided bodies 13A and 13B is attached to the exterior 20 of the wire harness WH.

  As shown in FIG. 7B, the exterior 20 of the wire harness WH to which the inner member 13 is attached is set in a molding die 33 composed of a lower die 31 and an upper die 32. Specifically, the exterior 20 of the wire harness WH is disposed in the lower mold 31 in a state where the upper mold 32 is separated from the lower mold 31.

  As shown in FIG. 7C, the upper die 32 is lowered and overlapped with the lower die 31. If it does in this way, it will be in the state where the exterior 20 of wire harness WH is arranged in the cavity (illustration abbreviation) formed between lower model 31 and upper model 32. In this state, the molten resin is filled into the cavity from the resin injection portion 34.

  As shown in FIG. 7D, when the molten resin is cured, the upper mold 32 is raised and separated from the lower mold 31.

  As shown in FIG. 7 (e), the outer package 20 in which the grommet 10 is integrally formed is taken out from the lower mold 31.

  As described above, according to the grommet 10 according to the above embodiment, the inner harness 13 and the inner member 13 are covered with the inner divided bodies 13A and 13B of the inner member 13 arranged around the wire harness WH. As described above, the elastic material is integrally formed with the wire harness WH. Therefore, unlike the grommet provided with the opening along the axial direction, there is no risk that the external portion such as a pulling force acts on the wire harness to expand the opening and reduce the sealing performance. That is, it is possible to reliably prevent water from entering from the surroundings and ensure high sealing performance between the panel P and the wire harness WH.

  In addition, by arranging the inner divided bodies 13A and 13B constituting the inner member 13 around the wire harness WH and forming the inner member 13 on the wire harness WH having connectors connected to both ends, for example, The wire harness WH can be provided immediately before the attachment process. This eliminates the need to insert the wire harness WH into the insertion hole and allows the grommet 10 to be attached, as compared with a grommet that requires a complicated operation of opening the insertion hole with a jig and passing the wire harness WH. Then, it is possible to ease the restriction of the work procedure by eliminating the process movement caused by performing the connector connection process and the like, and the workability can be improved.

  Further, since the inner member 13 is composed of a pair of half-divided inner divided bodies 13A and 13B, the inner member 13 can be easily moved by abutting the inner divided bodies 13A and 13B with the wire harness WH interposed therebetween. It can arrange | position around the wire harness WH and can improve workability | operativity.

  In addition, since the ends of the pair of inner divided bodies 13A and 13B are hinged to each other, the inner divided bodies 13A and 13B are rotated around the hinge coupling portion, and the wire harness WH is sandwiched to face each other. The inner member 13 can be easily disposed around the wire harness WH, and workability can be further improved.

  In addition, the pair of inner divided bodies 13A and 13B constituting the inner member 13 is provided with an engaging portion including a claw portion 21 and an engaging hole which are engaged with each other at the other end. Therefore, by engaging the claw portion 21 and the engagement hole, the inner divided bodies 13A and 13B can be maintained in a butted state, and the inner divided bodies 13A and 13B are butted together with the wire harness WH interposed therebetween. Thus, the state in which the inner member 13 is attached to the wire harness WH can be maintained.

  Moreover, since the inner member 13 has the flange portion 18 projecting outward in the circumferential direction, the coupling force between the inner member 13 and the elastic material can be increased, and an external force such as a tensile force is generated in the wire harness WH. At the same time, integrity with the inner member 13 can be reliably maintained, and high sealing performance can be obtained.

  In the above embodiment, the case where the grommet 10 is mounted on the panel P constituting the vehicle has been described as an example. However, the grommet 10 of the present invention is applicable to other than the panel P of the vehicle.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

Here, the features of the above-described grommets according to the present invention are summarized and listed in the following (1) to (5), respectively.
(1) The panel is provided in a watertight manner around the wire harness (WH) inserted through the opening (1) of the panel (P), and the sealing surface (12a) is in close contact with the panel (P). It is a grommet (10) made of an elastic material that seals between the panel (P) and the wire harness (WH) by being fixed to (P),
An inner member (13) configured by a plurality of inner divided bodies (13A, 13B) divided in the circumferential direction and locking the edge of the opening (1);
The wire so as to cover the wire harness (WH) and the inner member (13) in a state where the inner divided body (13A, 13B) of the inner member (13) is disposed around the wire harness (WH). A grommet in which the elastic material is integrally formed with a harness (WH).
(2) The grommet according to (1), wherein the inner member (13) is composed of a pair of the inner divided bodies (13A, 13B) divided in half.
(3) The grommet according to (2), wherein one end of the pair of inner divided bodies (13A, 13B) is hinged.
(4) The pair of inner divided bodies (13A, 13B) is provided with a claw portion (21) that engages with each other and an engagement portion including an engagement hole at the other end (3) ) Grommet described in the above.
(5) The grommet according to any one of (1) to (4), wherein the inner member (13) has a flange portion (18) projecting outward in the circumferential direction.

DESCRIPTION OF SYMBOLS 1 Opening part 10 Grommet 12a Seal surface 13 Inner member 13A, 13B Inner division body (division body)
18 Flange 20 Exterior 21 Claw P Panel WH Wire harness

Claims (5)

It is provided in a watertight manner around the wire harness inserted through the opening of the panel, and is sealed to the panel in a state where the sealing surface is in close contact with the panel, thereby sealing between the panel and the wire harness. A grommet made of elastic material,
An inner member configured by a plurality of divided bodies divided in the circumferential direction and locking the edge of the opening;
The grommet, wherein the elastic material is integrally formed on the wire harness so as to cover the wire harness and the inner member in a state where the divided body of the inner member is arranged around the wire harness. The grommet according to claim 1, wherein the inner member is constituted by a pair of the divided bodies that are divided in half. The grommet according to claim 2, wherein one end of each of the pair of divided bodies is hinged. The grommet according to claim 3, wherein the pair of divided bodies are provided with engaging portions that engage with each other at the other end. The grommet according to any one of claims 1 to 4, wherein the inner member has a flange portion projecting outward in the circumferential direction.

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