JP6141147B2 - Harness protection member - Google Patents

Description

  The present invention relates to a harness protection member that fits and attaches to a harness insertion hole formed through a wall plate.

  FIGS. 10-13 shows the conventional response | compatibility for preventing a wire harness being damaged by the edge of the harness penetration hole penetrated by the wall board.

  FIG. 10 shows that the edge 112 of the harness insertion hole 110 does not hit the wire harness by a hemming process in which the edge 111 of the harness insertion hole 110 formed through the wall plate 101 is folded back. In addition, arrow A1 shown in FIGS. 10-12 has shown the insertion direction of a wire harness.

  FIG. 11 shows an example in which the edge 112 of the harness insertion hole 110 does not hit the wire harness by a burring process that pushes the edge 111 of the harness insertion hole 110 formed through the wall plate 101 into a cylindrical shape.

  In FIG. 12, the edge 112 of the harness insertion hole 110 penetratingly formed in the wall plate 101 is left as it is, and the wire harness 120 is inserted by covering the wire harness 120 with the protective sheet 130, and the wire harness 120 is damaged at the time of insertion. Is to prevent.

  FIG. 13 shows a harness protection member 200 fitted and attached to a harness insertion hole 110 formed through the wall plate 101 to protect the wire harness.

  This harness protection member 200 is disclosed in Patent Document 1 below, and is an integrally molded product made of resin. The harness protection member 200 has an annular ring portion 210 that overlaps the peripheral edge portion of the harness insertion hole 110, and protrudes from the ring portion 210 in the penetration direction of the harness insertion hole 110 to fix the ring portion 210 to the peripheral edge of the harness insertion hole 110. A plurality of locking pieces 220 and two closing plates 240 formed integrally with the ring portion 210 via a flexible hinge portion 230.

  The closing plate 240 can be opened and closed in the direction of the arrow A2 by the flexible hinge portion 230. When the closing plate 240 is closed, the outer peripheral portion overlaps the ring portion 210 and covers the harness insertion hole 110. Further, the closing plate 240 includes a semicircular hole 241 through which the wire harness is inserted at the center. Further, in order to allow insertion of a wire harness having an outer diameter larger than that of the hole portion 241, a slit 242 extending in the radial direction from the hole portion 241 is formed in the closing plate 240.

JP 2009-237496 A

  However, in the correspondence of FIG. 10 and FIG. 11, each harness insertion hole 110 needs to be processed individually, and the processing itself takes time, so that there is a problem that cost reduction cannot be achieved by mass production.

  10 and 11, it is difficult to give a sufficient thickness to the edge of the hole. For this reason, there is a problem in that it is difficult to reduce the burden that the wire harness receives when the wire harness hits the edge of the hole by giving a sufficient thickness to the edge of the hole.

Further, in the correspondence of FIG. 12, when the protective sheet 130 is removed after the wire harness 120 is inserted into the harness insertion hole 110, the wire harness 120 directly contacts the edge 112 of the harness insertion hole 110. May damage the wire harness 120.
Moreover, as the length of the wire harness 120 to be penetrated is longer, it is necessary to lengthen the protective sheet 130, which may deteriorate workability and increase costs.

  Further, the harness protection member 200 of Patent Document 1 shown in FIG. 13 does not particularly cover the edge 112 portion of the harness insertion hole 110, and is on the side opposite to the side where the ring portion 210 of the wall plate 101 overlaps. Further, the edge 112 of the harness insertion hole 110 is exposed, and there is a risk of causing damage to the wire harness due to contact between the edge 112 and the wire harness.

  Furthermore, the harness protection member 200 of Patent Document 1 has a problem that waterproofness cannot be ensured because many slits 242 are formed in the closing plate 240.

  Accordingly, an object of the present invention is to eliminate the above-described problems, and to reliably prevent the edge from coming into contact with the wire harness, and at the same time, impart sufficient thickness to the edge of the harness insertion hole to An object of the present invention is to provide a harness protection member that can ensure high protection performance and can reduce the cost by mass production.

The above-described object of the present invention is achieved by the following configuration.
(1) A resin-made first annular member that is fitted into and attached to the harness insertion hole from one side of the wall plate through which the harness insertion hole is formed, and a fitting attachment inside the first annular member A second annular member made of resin,
The first annular member includes a ring-shaped first flange portion that overlaps a peripheral edge of the harness insertion hole, and extends from the inner periphery of the first flange portion in the penetration direction of the harness insertion hole. A first cylindrical portion covering an inner peripheral surface, and the first flange protruding from the tip of the first cylindrical portion along the surface of the wall plate at a plurality of locations spaced in the circumferential direction of the first cylindrical portion; A plurality of first locking projections that clamp the periphery of the harness insertion hole between the first and second locking projections, and the first cylindrical portion that is between the adjacent first locking projections A cylindrical notch portion in which a predetermined length is cut in the circumferential direction in the region, and an inner peripheral side region of the first flange portion connected to the cylindrical notch portion, and a wall below the first flange portion A flange notch that exposes the plate, and a plurality of notch parts for a mating member,
A harness protection member characterized in that a grommet including the second annular member as a component can be attached to the wall plate exposed to the flange notch.

  (2) The circumferential width dimension of the cylindrical part notch part and the flange notch part is set to be smaller than the outer diameter of the electric wire inserted into the harness insertion hole. Harness protection member.

(3) The second annular member includes a ring-shaped second flange portion that overlaps with a peripheral edge of the harness insertion hole from the other side of the wall plate, and an harness insertion hole that extends from the inner periphery of the second flange portion. A second cylindrical portion extending in the penetrating direction and fitted inside the first cylindrical portion, and exposed to the flange notch from a position corresponding to the flange notch at the tip of the second cylindrical portion. A plurality of second locking projections that protrude along the surface of the wall plate and sandwich the periphery of the harness insertion hole between the second flange portion and perform fixing to the wall plate. The grommet inner member of the grommet,
The grommet includes a grommet outer member that is mounted on the second annular member and closes the harness insertion hole as a component.
The harness protection member according to (1) or (2), wherein the second annular member of the grommet is locked to the wall plate.

  According to the configuration of (1) above, the first annular member constituting the harness protection member is made of resin, so that cost reduction can be achieved by mass production. Moreover, the edge part of the inner periphery of the harness penetration hole formed in the wall board is covered with the 1st cylindrical part of a 1st annular member. Therefore, when attaching the grommet (a combination of the grommet inner member and the grommet outer member) to the harness insertion hole, it is possible to reliably prevent the wire harness moving in the length direction from coming into contact with the edge. It is possible to reliably prevent the wire harness from being damaged by the contact.

  According to the configuration of (2) above, the circumferential lengths of the cylindrical notch portion and the flange notch portion of the first flange portion are set to be smaller than the outer diameter of the electric wire that passes through the harness insertion hole. Therefore, for example, when the wire harness moves in the length direction with respect to the edge of the harness insertion hole when the grommet is attached, the electric wire is prevented from coming into contact with the edge of the harness insertion hole exposed to the cylindrical notch portion and the flange notch portion. can do.

  According to the configuration of (3) above, the grommet can be reliably fixed to the harness insertion hole, and the harness insertion hole can be reliably waterproofed by the grommet.

  According to the harness protection member of the present invention, when the grommet is mounted (when the wire harness is inserted), it is possible to reliably prevent the edge from coming into contact with the wire harness and to reduce the cost by mass production.

  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 showing a usage state of an embodiment of a harness protection member according to the present invention. FIG. 2 is a perspective view showing a state in which the first annular member shown in FIG. 1 is attached to the harness insertion hole of the wall plate. 3 is a cross-sectional view taken along line BB in FIG. FIG. 4 is a perspective view of a state in which the first annular member and the grommet inner member are attached to the harness insertion hole of the wall plate. FIG. 5 is a perspective view of the attachment state shown in FIG. 4 viewed from another angle on the same side of the wall plate. FIG. 6 is a perspective view of the attachment state shown in FIG. 4 as viewed from the back side of the wall plate. FIG. 7 is a perspective view of a state in which the grommet is attached to the first annular member. FIG. 8 is a perspective view of a state in which the grommet is attached to the first annular member as viewed from the opposite side to FIG. FIG. 9 is a partial cross-sectional view of a state where the grommet is attached to the first annular member. FIG. 10 is an explanatory view of a conventional wire harness protection structure of a harness insertion hole. FIG. 11 is an explanatory view of another example of a conventional wire harness protection structure of a harness insertion hole. FIG. 12 is an explanatory diagram of another example of wire harness protection for a conventional harness insertion hole. FIG. 13 is a perspective view of a conventional harness protection member.

  Hereinafter, preferred embodiments of a harness protection member according to the present invention will be described in detail with reference to the drawings.

  1 to 9 show an embodiment of a harness protection member according to the present invention, FIG. 1 is a perspective view showing a use state of the harness protection member of an embodiment of the present invention, and FIG. FIG. 3 is a cross-sectional view taken along the line B-B of FIG. 2, and FIG. 4 is a first view of the wall plate harness insertion hole. 5 is a perspective view of a state in which the annular member and the grommet inner member are attached, FIG. 5 is a perspective view of the attachment state shown in FIG. 4 viewed from another angle on the same side of the wall plate, and FIG. FIG. 7 is a perspective view of a state where the grommet is attached to the first annular member, and FIG. 8 is a state where the grommet is attached to the first annular member. The perspective view of the state seen from the opposite side to 7, FIG. 9 is a state in which the grommet is attached to the first annular member Partial is a cross-sectional view.

  The harness protection member 1 of the present embodiment includes a wire harness 4 inserted into the harness insertion hole 31 by trimming the periphery of an elliptical harness insertion hole 31 formed through a wall plate 3 such as a vehicle body panel in a vehicle. It is a member to protect.

  As shown in FIG. 1, the harness protection member 1 of the present embodiment includes a first annular member 5, a grommet inner member (second annular member) 6, and a grommet outer member 9. The first annular member 5 and the grommet inner member 6 are both integrally molded products of resin. The grommet outer member 9 is an integrally molded product made of soft rubber. As shown in FIGS. 7 to 9, the grommet 10 is configured by combining a grommet inner member 6 and a grommet outer member 9 with a known configuration.

  The first annular member 5 is fitted and attached to the harness insertion hole 31 from one side of the wall plate 3 as indicated by an arrow A3 in FIG. As shown in FIGS. 2 and 3, the first annular member 5 includes a ring-shaped first flange portion 51 that overlaps the periphery of the harness insertion hole 31, and a harness insertion hole from the inner periphery of the first flange portion 51. The first cylindrical portion 52 extending in the penetrating direction of 31, the plurality of first locking projections 53 provided at a plurality of locations spaced in the circumferential direction of the first cylindrical portion 52, and the adjacent first locking A plurality of counterpart member cutouts 54 provided in the region between the protrusions 53.

The first flange portion 51 has an elliptical shape corresponding to the shape of the harness insertion hole 31.
The first cylindrical portion 52 has an axial length protruding from the first flange portion 51 set to be substantially the same as the plate thickness of the wall plate 3. The first tubular portion 52 covers the inner peripheral surface (that is, the edge portion) of the harness insertion hole 31.

  In the present embodiment, the plurality of first locking projections 53 are provided at a total of four locations, two locations facing the elliptical major axis direction and two locations facing the elliptical minor axis direction. As shown in FIG. 3, each first locking protrusion 53 is a protrusion protruding along the surface of the wall plate 3 from the tip of the first cylindrical portion 52. Each first locking projection 53 holds the peripheral edge of the harness insertion hole 31 between the first flange portion 51 and fixes to the wall plate 3.

  The plurality of notch portions 54 for mating members are respectively provided at positions that are intermediate between the adjacent first locking projections 53. As shown in FIG. 3, each counterpart member cutout portion 54 includes a cylindrical cutout portion 541 in which a predetermined length L1 is cut in the circumferential direction in the region on the first cylindrical portion 52, and the cylindrical cutout portion 541. And a flange cutout portion 542 in which a region on the inner peripheral side of the first flange portion 51 is cut out. The circumferential length of the flange cutout portion 542 coincides with the circumferential length of the tubular cutout portion 541. In the site | part in which the flange notch part 542 was formed, as shown in FIG. 3, the wall board 3 under the 1st flange part 51 is exposed.

  In the case of the present embodiment, the circumferential width dimension L1 of the cylindrical notch portion 541 and the flange notch portion 542 is set smaller than the outer diameter D1 of the electric wire 41 inserted through the harness insertion hole 31, as shown in FIG. Has been. The electric wire 41 is an electric wire constituting the wire harness 4 that is inserted into the harness insertion hole 31.

  The grommet inner member 6 is fitted and attached to the inside of the first annular member 5 from the other side of the wall plate 3 as indicated by an arrow A4 in FIG.

  As shown in FIGS. 4 to 6, the grommet inner member 6 includes a ring-shaped second flange portion 61 that overlaps the peripheral edge of the harness insertion hole 31 from the other side of the wall plate 3, and the second flange portion 61. A second cylindrical portion 62 extending from the inner periphery in the penetration direction of the harness insertion hole 31 and a plurality of second locking projections 63 provided at the tip of the second cylindrical portion 62 are provided.

The second flange portion 61 has an elliptical shape corresponding to the shape of the harness insertion hole 31.
The second cylindrical portion 62 extends from the inner periphery of the second flange portion 61 in the penetration direction of the harness insertion hole 31, and reaches the top portion 62 a protruding from the first annular member 5. It is a double cylinder structure provided with the inner cylinder part 622 which makes a U-turn from 62a to the 2nd flange part 61 side.

  The top portion 62 a that is the tip of the second cylindrical portion 62 is set to have an axial length so as to protrude from the wall plate 3 and further protrude from the first annular member 5.

  In addition, as shown in FIG. 4, guide portions 623 are provided at two opposing positions at the tip of the second cylindrical portion 62. These guide portions 623 have a guide function when the grommet 10 is attached to the first annular member 5 attached to the harness insertion hole 31.

  The second locking protrusions 63 are protrusions provided at the four ends corresponding to the flange notches 542 at the tip of the second cylindrical portion 62. As shown in FIGS. 4 and 5, the second locking protrusion 63 protrudes along the surface of the wall plate 3 exposed in the flange notch 542. The second locking protrusion 63 sandwiches the peripheral edge of the harness insertion hole 31 between the second flange portion 61 and secures it to the wall plate 3.

  In the case of the present embodiment, as shown in FIG. 1, a grommet 10 is configured by attaching a grommet outer member 9 made of soft rubber to the second cylindrical portion 62 of the grommet inner member 6. The grommet 10 is inserted with the wire harness 4 after the grommet outer member 9 is attached to the grommet inner member 6. And the waterproofness of the harness insertion hole 31 is ensured because the grommet 10 is attached to the harness insertion hole 31.

  As shown in FIG. 1, the grommet outer member 9 shown in the present embodiment includes a main body portion 91 that fits into the second cylindrical portion 62, and a wire support tube portion 92 that extends from the main body portion 91. I have.

  In order to pass the wire harness 4 through the harness insertion hole 31, first, the first annular member 5 is attached to the harness insertion hole 31. Next, the wire harness 4 to which the grommet 10 is attached is inserted into the first annular member 5 and the grommet inner member 6 is fixed to the first annular member 5 as indicated by an arrow A4 in FIG.

  In the case of the harness protection member 1 according to the embodiment described above, the first annular member constituting the harness protection member is made of resin, so that cost reduction can be achieved by mass production. Moreover, the edge part of the inner periphery of the harness penetration hole formed in the wall board is covered with the 1st cylindrical part of a 1st annular member. Therefore, when the grommet 10 is attached to the harness insertion hole, the wire harness 4 moving in the length direction can be reliably prevented from coming into contact with the edge, and the wire harness can be reliably prevented from being damaged by the contact of the edge. be able to.

  Further, in the case of the harness protection member 1 of one embodiment, the circumferential length L1 of the cylindrical notch portion 541 and the flange notch portion 542 of the first flange portion 51 is the outer diameter of the electric wire 41 that passes through the harness insertion hole 31. It is set smaller than D1. Therefore, for example, when the wire harness 4 moves in the length direction with respect to the edge of the harness insertion hole 31 when the grommet is mounted, the electric wire 41 is formed on the edge of the harness insertion hole 31 exposed to the cylindrical notch portion 541 and the flange notch portion 542. Can be prevented from contacting.

  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 embodiment of the harness protection member according to the present invention described above are briefly summarized and listed in the following [1] to [3], respectively.

[1] A resin-made first annular member (5) fitted and attached to the harness insertion hole (31) from one side of the wall plate (3) through which the harness insertion hole (31) is formed, A resin-made second annular member (6) fitted and mounted inside the first annular member (5),
The first annular member (5) includes a ring-shaped first flange portion (51) that overlaps the periphery of the harness insertion hole (31), and the harness insertion hole from the inner periphery of the first flange portion (51). A first cylindrical portion (52) extending in the penetration direction of (31) and covering the inner peripheral surface of the harness insertion hole (31), and a plurality of locations spaced in the circumferential direction of the first cylindrical portion (52) And projecting along the surface of the wall plate (3) from the tip of the first tubular part (52), and sandwiching the periphery of the harness insertion hole (31) between the first flange part (51) and A plurality of first locking projections (53) that are fixed to the wall plate (3) and an area on the first tubular portion (52) between the adjacent first locking projections (53) And a cylindrical cutout portion (541) obtained by cutting a predetermined length in the circumferential direction and the cylindrical cutout portion (541). A plurality of mating members each having a flange notch portion (542) that exposes the wall plate (3) under the first flange portion (51) by notching a region on the inner peripheral side of the one flange portion (51). A notch (54) for members,
Harness protection characterized in that a grommet (10) including the second annular member (6) as a component can be attached to the wall plate (3) exposed to the flange notch (542). Member (1).

  [2] The circumferential width dimension (L1) of the cylindrical notch (541) and the flange notch (542) is the outer diameter (D1) of the electric wire (41) inserted through the harness insertion hole (31). The harness protection member (1) according to the above [1], wherein the harness protection member (1) is set to be smaller than.

[3] The second annular member (6) includes a ring-shaped second flange portion (61) that overlaps a peripheral edge of the harness insertion hole (31) from the other side of the wall plate (3), and the first annular member (6). A second tubular portion (62) extending from the inner periphery of the two flange portions (61) in the penetration direction of the harness insertion hole (31) and fitting inside the first tubular portion (52); The second cylindrical portion (62) protrudes along the surface of the wall plate (3) exposed from the flange notch (542) from a position corresponding to the flange notch (542) at the tip of the second cylindrical portion (62). A plurality of second locking projections (63) that sandwich the periphery of the harness insertion hole (31) between the two flange portions (61) and that are fixed to the wall plate (3), and Constituting the grommet inner member (6) of the grommet (10),
The grommet (10) includes a grommet outer member (9) that is attached to the second annular member (6) and closes the harness insertion hole (31) as a component.
The harness protection member (1) according to [1] or [2], wherein the second annular member (6) of the grommet (10) is locked to the wall plate 3.

DESCRIPTION OF SYMBOLS 1 Harness protection member 3 Wall board 4 Wire harness 5 1st cyclic | annular member 6 Grommet inner member (2nd cyclic | annular member)
DESCRIPTION OF SYMBOLS 9 Grommet outer member 10 Grommet 31 Harness insertion hole 51 1st flange part 52 1st cylindrical part 53 1st latching protrusion 54 Notch part for mating members 61 2nd flange part 62 2nd cylindrical part 63 2nd latching protrusion 541 Tube part notch part 542 Flange notch part 623 Guide part

Claims (3)

A first annular member made of resin fitted and fitted into the harness penetration hole from one side of the wall plate through which the harness insertion hole is formed, and resin fitted and fitted inside the first annular member A second annular member made of,
The first annular member includes a ring-shaped first flange portion that overlaps a peripheral edge of the harness insertion hole, and extends from the inner periphery of the first flange portion in the penetration direction of the harness insertion hole. A first cylindrical portion covering an inner peripheral surface, and the first flange protruding from the tip of the first cylindrical portion along the surface of the wall plate at a plurality of locations spaced in the circumferential direction of the first cylindrical portion; A plurality of first locking projections that clamp the periphery of the harness insertion hole between the first and second locking projections, and the first cylindrical portion that is between the adjacent first locking projections A cylindrical notch portion in which a predetermined length is cut in the circumferential direction in the region, and an inner peripheral side region of the first flange portion connected to the cylindrical notch portion, and a wall below the first flange portion A flange notch that exposes the plate, and a plurality of notch parts for a mating member,
A harness protection member characterized in that a grommet including the second annular member as a component can be attached to the wall plate exposed to the flange notch.   2. The harness protection according to claim 1, wherein width dimensions in a circumferential direction of the cylindrical part notch part and the flange notch part are set to be smaller than an outer diameter of an electric wire inserted into the harness insertion hole. Element. The second annular member includes a ring-shaped second flange portion that overlaps the periphery of the harness insertion hole from the other side of the wall plate, and an inner periphery of the second flange portion in a through direction of the harness insertion hole. A second cylindrical portion that extends and fits inside the first cylindrical portion, and is exposed to the flange cutout portion from a position corresponding to the flange cutout portion at a tip of the second cylindrical portion. A plurality of second locking projections projecting along the surface of the wall plate and sandwiching a peripheral edge of the harness insertion hole between the second flange portion and securing to the wall plate, and the grommet The grommet inner member of
The grommet includes a grommet outer member that is mounted on the second annular member and closes the harness insertion hole as a component.
The harness protection member according to claim 1 or 2, wherein the second annular member of the grommet is locked to the wall plate.

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