JP5569421B2 - Grommet length adjustment structure for wire harness - Google Patents

Description

  The present invention relates to a length adjusting structure for a grommet for a wire harness, and more specifically, the length of a bellows cylinder portion provided between both end fixing portions of the grommet can be adjusted, and is shared even if the dimensions between the fixing portions at both ends are different. It can be used in.

Wire harnesses routed on panels that are pivotally mounted on the body of a car trunk room, such as a lid (trunk lid) and a back door, are connected to the side of the wire harness from the through hole drilled in the lid or door panel. In many cases, the connector is connected to the wire harness routed to the vehicle body panel.
Since the body harness crossing portion of the wire harness is exposed to the outside, it is covered with a grommet made of rubber or elastomer having a bellows tube portion in order to protect the wire harness and improve its appearance.
The grommet is provided with a fixing portion that fits into a through hole formed in the panel at both ends, and a portion sandwiched between the fixing portions on both sides is a bellows tube portion, and bends following the opening and closing operation of the lid and door. I can do it.

  Moreover, as this kind of grommet, grommet 100 shown to FIG. 11 (A) (B) is provided in Unexamined-Japanese-Patent No. 2008-17676. The grommet 100 is provided with fixing portions 102 and 103 on both sides of the bellows tube portion 101, an extension portion 105 protruding from one fixing portion 102, a slit 106 is provided in the extension portion 105, and a wire passing through the grommet 100. A part of the harness 120 can be moved into the extension portion 105 and pulled out from the slit 106. The grommet 100 is assembled to the vehicle body by locking one fixing portion 103 in the through-hole of the vehicle body panel and then locking the other fixing portion 102 to the other panel on the rotation side by making the bellows tube portion 101 contracted. Locked in the hole.

JP 2008-17676 A

The grommet shown in FIG. 11 can be shared by changing the degree of expansion and contraction of the bellows cylinder portion when attached to the vehicle body, even if the dimension between the fixed portions provided on both sides of the bellows cylinder portion is constant. is there.
However, the degree of contraction of the bellows tube part when the grommet is assembled to the vehicle body and the degree of expansion and contraction after the assembly are not stable. In addition, when the lid of the trunk lid is in a normal state or in a state where the door is closed, the bellows tube portion is contracted from the original state, so that the restoring force always works, so that a constant shape can always be maintained. Can not.
Therefore, it is inappropriate to use the grommet shown in FIG. 11 when the dimensions between the fixing portions at both ends of the grommet are different and the length of the bellows cylinder portion between them is different.

  The present invention has been made in view of the above problems, and allows the length of the bellows tube portion to be shortened and extended in multiple stages while keeping the length of the bellows tube portion provided between the fixed portions at both ends constant. The challenge is to share grommet.

In order to solve the above-described problems, the present invention provides a bellows cylinder portion in which annular crests and valleys are alternately provided in the length direction, and an insertion member inserted into the through hole of the panel at both ends in the length direction of the bellows cylinder portion. A structure for adjusting the length of a grommet for a wire harness made of rubber or elastomer provided with a panel fixing portion to be stopped,
While providing a length adjusting portion provided with a pair of locking ridges at both ends in the length direction at an intermediate portion in the length direction of the bellows tube portion,
The clip includes a clip attached to the bellows tube portion, and the clip includes a pair of semi-annular portions having one end connected by a hinge portion and a lock coupling portion at the other end, and the length of the pair of semi-annular portions. Protrusions are formed on the inner surfaces on both sides in the direction,
The length of the grommet for a wire harness that can be held by adjusting the overall length of the bellows cylinder part by extending and contracting the length adjustment part of the bellows cylinder part to position the projection of the clip on the side surface of the locking peak part. Provides an adjustable structure.

The protrusions provided on the inner surfaces on both sides in the length direction of the pair of semi-annular portions of the clip are locking protrusions composed of a pair of outer protrusions and inner protrusions,
The length adjusting portion of the bellows tube portion at at least two positions of an outer position of the outer surface of the outer protrusion of the clip, an intermediate position between the outer protrusion and the inner protrusion, and an inner position of the inner surface of the inner protrusion. The locking peak portion is arranged by expanding and contracting, and the total length of the bellows tube portion can be adjusted and held.

As described above, when the outer protrusion and the inner protrusion are provided on both sides of the clip, both of the pair of locking peaks provided on both sides of the length adjusting portion of the bellows cylinder portion of the grommet are connected to the outer protrusion of the clip. The length adjusting portion is maximized and the grommet is maximized in the state of being arranged at the outer position of the outer surface.
Further, the length of the length adjusting portion is an intermediate length in a state where both of the pair of locking ridges are arranged at an intermediate position between the outer protrusion and the inner protrusion of the clip.
In addition, the length of the length adjusting portion is the minimum length in a state where both of the pair of locking ridges are disposed on the inner surface of the inner protrusion of the clip.

In this way, the length can be adjusted by the above three basic patterns, and further, the arrangement position of one locking peak and the positioning position of the other locking peak are different, so that there are nine lengths in total. Adjustment is possible.
For example, if one of the pair of locking ridges is disposed on the inner surface of the inner protrusion and the other locking ridge is disposed on the outer surface of the other outer protrusion, the length becomes the same as the intermediate length and the clip is sandwiched. One side can be longer and the other side shorter.

  Further, it is preferable that a pair of locking ridges provided at both ends of the length adjusting portion have a diameter larger than that of the accordion tube portion and have the same width as the ridge portion. In addition, it is good also as the same as the outer diameter of the peak part of a bellows cylinder part.

The clip is for attaching the grommet bellows tube portion to the vehicle body panel, and it is preferable that a hook piece projects from the outer surface of one semi-annular portion of the clip.
The grommet that covers the wire harness that runs between the lid of the trunk lid and the vehicle body panel is a bellows tube in the middle of the grommet in the length direction so that the grommet does not bite between the lid and the vehicle body panel. The part may be held by the vehicle body panel via a clip.

  A plurality of crests and troughs are continuously provided at a small pitch in the length adjusting part sandwiched between the pair of locking crests of the bellows cylinder part, and the pitch is smaller than the pitch other than the length adjusting part. It is preferable.

The pitch of the length adjusting portion is preferably 3 mm to 4 mm, and preferably 1/2 to 2/3 of the pitch of other portions.
Thus, if the pitch of the expansion / contraction portion is reduced, the overall length of the bellows tube portion and the overall length of the grommet can be finely adjusted.

  The present invention is preferably used when one of the panel fixing portions of the grommet is inserted and locked into the through hole of the vehicle body panel, and the other of the panel fixing portions is inserted and locked into the through hole of the trunk lid panel or the door panel. .

As described above, in the present invention, the clip that holds the bellows cylinder portion of the grommet that is mounted on the wire harness that spans the vehicle body panel on the vehicle body is used, and the bellows cylinder portion is connected to the locking projection provided on the clip. It is possible to easily adjust the length of the bellows tube portion and thus the total length of the grommet simply by selecting the arrangement positions of the pair of locking peaks on both sides of the provided length adjusting portion.
Therefore, even when it is necessary to make the length of the bellows cylinder portion different depending on the vehicle type, the grommet can be shared, and as a result, the grommet can be provided at low cost.

It is a disassembled perspective view of the grommet and clip of 1st Embodiment of this invention. It is a top view in the state where a clip was attached to the grommet. It is an enlarged view of the length adjustment part of a grommet. It is an expanded development view of a clip. It is a perspective view which shows the attachment method of the clip to a grommet. (A) (B) (C) is drawing which shows the latching position of the clip with respect to a grommet. (A) is a figure which shows the state which changed the latching position of the clip with respect to a grommet in the length direction, (B) is drawing which shows the length relationship of the bellows cylinder part in the latching position of (A). It is a top view which shows the grommet of 2nd Embodiment. (A) (B) (C) is a top view which shows the state which attached the clip to the grommet of 2nd Embodiment. (A) (B) is a top view which shows the state which attached the clip of 3rd Embodiment to the grommet. (A) (B) is drawing which shows a prior art example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1st Embodiment is shown in FIG. 1 thru | or FIG.
A grommet 1 according to the present invention is externally mounted on a portion of a wire harness 2 that is routed on a trunk lid (hereinafter referred to as a lid) of an automobile, and is formed of rubber or elastomer.

  The grommet 1 includes a bellows tube portion 3 in which annular crest portions 3a and valley portions 3b are alternately provided in the length direction, and a panel that is inserted and locked into through holes in the panel at both ends of the bellows tube portion 3 in the length direction. Fixing portions 4 and 5 are provided. The panel fixing portions 4 and 5 have a shape in which vehicle body locking recesses 4a and 5a are provided on the outer peripheral surface of the enlarged diameter cylindrical portion projecting from the distal end side of the end portion of the bellows cylindrical portion 3, and the panel fixing portion 4 is formed on the body panel. The panel fixing portion 5 is inserted and locked into the through hole of the lid panel.

A length adjusting portion 10 in which a plurality of peak portions 10 a and valley portions 10 b are continuously provided at a small pitch is provided at an intermediate portion in the length direction of the bellows tube portion 3 of the grommet 1, and the length adjusting portions 10 are provided on both sides of the length adjusting portion 10. A pair of locking ridges 11 and 12 having a larger diameter and the same width as the ridge 3a are provided.
The pitch of the peak portion 10a of the length adjusting portion 10 sandwiched between the locking peak portions 11 and 12 is about 1/2 to 2/3 of the pitch of the peak portion 3a of the bellows cylinder portion 3 in the other region. .

  After the wire harness 2 passed through the grommet 1 is bridged between the vehicle body and the lid, the clip 15 attached to the intermediate portion of the bellows tube portion 3 of the grommet 1 is locked to the vehicle body panel (attached member). Thus, the grommet 1 is prevented from being caught between the lid and the vehicle body when the lid is closed.

The clip 15 is made of a resin molded product, and includes a pair of semi-annular portions 23 and 24 that are connected at one end by a hinge portion 20 and provided with lock coupling portions 21 and 22 at the other end. An L-shaped hook 25 projects from the outer surface of one semi-annular portion 23 as an attachment portion to the vehicle body panel.
Locking protrusions each including a pair of outer protrusions 23A and 23B and inner protrusions 23C and 23D are provided on the inner surfaces on both sides in the length direction of the one semi-annular portion 23. An intermediate gap C1 is formed in which a half circumferential portion of the locking peak portion 11 can be inserted into an intermediate portion sandwiched between the outer protrusion 23A and the inner protrusion 23C projecting on one inner surface in the longitudinal direction of the semi-annular portion 23. ing. Similarly, an intermediate gap C2 in which the half circumferential portion of the locking peak portion 12 can be inserted into an intermediate portion sandwiched between the outer protrusion 23B and the inner protrusion 23D projecting on the other inner surface in the length direction of the semicircular ring portion 23. Is open.

  Similarly, a pair of outer protrusions 24A and 24B and inner protrusions 24C and 24D are provided on the inner surfaces on both sides in the length direction of the other semi-annular portion 24, respectively. The outer protrusions 24A and 24B are provided at positions facing the outer protrusions 23A and 23B of the semi-annular part 23, and the inner protrusions 24C and 24D are provided at positions facing the inner protrusions 23C and 23D of the semi-annular part 23.

  An intermediate gap C3 is formed in the intermediate portion sandwiched between the outer protrusion 24A and the inner protrusion 24C projecting on one inner surface in the length direction of the semi-annular portion 24 so that the other half-circumferential portion of the locking peak portion 11 can be inserted. ing. Similarly, an intermediate gap in which the other half-circumferential portion of the locking mountain portion 12 can be inserted into an intermediate portion sandwiched between the outer protrusion 24B and the inner protrusion 24D protruding from the other inner surface in the length direction of the semi-annular portion 24. C4 is opened.

  As shown in FIG. 5, the clip 15 has a pair of semi-annular portions 23, after disposing locking ridges 11 and 12 of the grommet 1 with respect to the outer protrusion and the inner protrusion at a required position, which will be described later. 24 is closed in an annular shape with the hinge portion 20 as a fulcrum, and the lock coupling portions 21 and 22 are locked to each other to lock and position the grommets 11 and 12 for locking and adjust the length of the bellows tube portion It can be fixed with.

That is, the length adjusting part 10 of the bellows cylinder part 3 of the grommet 1 is expanded and contracted so that the locking position of the clip 15 that locks the pair of locking mountain parts 11 and 12 can be selected and arranged.
The selected position of the clip 15 is the outer position P1 of the outer surface of the outer protrusions 23A, 23B, 24A, 24B, the intermediate position P2 of the intermediate gaps C1 to C4 sandwiched between the outer protrusion and the inner protrusion, and the inner protrusions 23C, 23D. , 24C, 24D, and the inner position P3 of the inner surface.

In FIG. 6 (A), the length adjusting portion 10 of the grommet 1 is most contracted, and the locking ridges 11 and 12 on both sides are positioned at the inner position P3, and the dimension between the locking ridges 11 and 12 is set. The minimum value is 25 mm in this embodiment.
In FIG. 6 (B), the length adjusting portion 10 of the grommet 1 is not expanded and contracted, and the intermediate crests 11 and 12 on both sides are fitted in the intermediate gaps C1, C3 and C2, C4. Positioned at P2, the dimension between the locking peaks 11 and 12 is 35 mm in this embodiment.
In FIG. 6C, the length adjusting portion 10 of the grommet 1 is extended to the maximum, and both the locking ridges 11 and 12 on both sides are positioned at the outer position P1, and the dimension between the locking ridges 11 and 12 is set. The maximum is 47 mm in this embodiment.

  6 (A), (B), and (C) are three basic patterns, by selectively placing the locking peaks 11 and 12 at any one of the outer position P1, the intermediate position P2, and the inner position P3, The length can be adjusted with nine patterns.

In the nine patterns, in order to adjust the dimension from the fixing position by the clip 15 to the panel fixing part 4 or the panel fixing part 5, as shown in FIG. The case where the position P3 and the locking peak 11 are set to the outer position P1 is also included. With this configuration, the dimension from the clip 15 to the panel fixing part 4 can be shortened, and the dimension from the panel fixing part 5 can be increased.
Further, since the adjusted length of the length adjusting portion 10 of the bellows tube portion 3 can be positioned and held by the locking projections 23A to 23D and 24A to 24D of the clip 15, the length of the bellows tube portion 3 after the adjustment is stabilized. In addition, since a restoring force is not applied to the bellows tube portion in a normal closed state, a constant shape can always be maintained.

8 and 9 show a second embodiment.
In the second embodiment, the pair of locking ridges 11-1 and 12-1 at both ends of the length adjusting portion 10 provided in the bellows tube portion have the same diameter as the other ridges, as in the first embodiment. Not large diameter. The outer diameter of the crests sandwiched between the engaging crests 11-1 and 12-1 at both ends is equal to the outer diameter of the other crests, but the pitch of the crests is the same as in the first embodiment. The pitch is smaller than other parts.
On the other hand, the clip 15 has the same shape as the first embodiment.

  As shown in FIG. 9, the outer protrusions of the locking protrusions of the clip 15 can be obtained without increasing the outer diameters of the locking peaks 11-1 and 12-1 at both ends of the length adjusting portion 10. 23A, 23B, 24A, 24B, inner projections 23C, 23D, 24C, 24D are positioned on the side surfaces of the locking ridges 11-1, 12-1, so that the length adjuster 10 is adjusted and held. Can do.

FIG. 10 shows a third embodiment.
In the third embodiment, the locking projections provided on both sides of each semi-annular portion of the clip 15 are each one locking projection 50.
The grommet bellows tube portion is provided with a length adjusting portion 10 similar to that of the first embodiment, and locking ridge portions 11 and 12 having large diameters are provided at both ends thereof.

  As shown in FIG. 10A, when the locking peaks 11 and 12 are arranged on the inner surface side of the locking projection 50 of the clip 15, and the locking peaks on the outer surface side of the locking projection 50. The length can be adjusted in the case of arranging 11 and 12.

  The present invention is not limited to the above embodiment, and a pair of locking ridges may be provided on both sides of the length adjusting portion provided in the bellows cylinder portion of the grommet, and the portion sandwiched between the locking ridges may be provided. It is not always necessary to make the pitch of the mountain portion small. Even if the pitch is the same, the length can be shortened by contraction.

  The clip is attached to the vehicle body panel. However, when the grommet is not held by the vehicle body panel, the clip may be attached only for adjusting the length of the bellows tube portion.

DESCRIPTION OF SYMBOLS 1 Grommet 2 Wire harness 3 Bellows cylinder part 4, 5 Panel fixing | fixed part 10 Length adjustment part 11, 12 Locking peak part 15 Clip 23, 24 Semi-annular part 23A, 23B, 24A, 24B Outer protrusion 23C, 23D, 24C, 24D Inner protrusion C1-C4 Intermediate gap
P1 outer position P2 middle position P3 inner position

Claims (6)

Rubber or elastomer provided with bellows tube portions in which annular crests and valley portions are alternately provided in the length direction, and panel fixing portions that are inserted and locked into the through holes of the panel at both ends in the length direction of the bellows tube portions. A length adjustment structure of a grommet for a wire harness comprising:
While providing a length adjusting portion provided with a pair of locking ridges at both ends in the length direction at an intermediate portion in the length direction of the bellows tube portion,
The clip includes a clip attached to the bellows tube portion, and the clip includes a pair of semi-annular portions having one end connected by a hinge portion and a lock coupling portion at the other end, and the length of the pair of semi-annular portions. Protrusions are formed on the inner surfaces on both sides in the direction,
The length of the grommet for a wire harness that can be held by adjusting the overall length of the bellows cylinder part by extending and contracting the length adjustment part of the bellows cylinder part to position the projection of the clip on the side surface of the locking peak part. Adjustable structure. The protrusions provided on the inner surfaces on both sides in the length direction of the pair of semi-annular portions of the clip are locking protrusions composed of a pair of outer protrusions and inner protrusions,
The length adjusting portion of the bellows tube portion at at least two positions of an outer position of the outer surface of the outer protrusion of the clip, an intermediate position between the outer protrusion and the inner protrusion, and an inner position of the inner surface of the inner protrusion. The length adjustment structure of the grommet for wire harnesses according to claim 1, wherein the locking peak portion is arranged by extending and contracting to adjust and maintain the overall length of the bellows tube portion.   3. The wire harness according to claim 1, wherein a pair of locking ridges provided at both ends of the length adjusting portion has a diameter larger than that of the ridge portion of the bellows tube portion and the same width as the ridge portion. Grommet length adjustment structure.   4. The clip according to claim 1, wherein the clip is used for mounting the grommet bellows tube portion to the vehicle body panel, and a hook piece projects from the outer surface of one semi-annular portion of the clip. 5. The length adjustment structure of the grommet for wire harnesses of description.   A plurality of crests and troughs are continuously provided at a small pitch in the length adjusting part sandwiched between the pair of locking crests of the bellows cylinder part, and the pitch is smaller than the pitch other than the length adjusting part. The length adjustment structure of the grommet for wire harnesses according to any one of claims 1 to 4.   The one of the panel fixing portions of the grommet is inserted and locked in the through hole of the vehicle body panel, and the other of the panel fixing portions is inserted and locked in the through hole of the trunk lid panel or the door panel. The length adjustment structure of the grommet for wire harnesses of any one of Claims.

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