Grommet with water stop cover and harness with water stop cover

Abstract

To provide a grommet with a water stop cover and a harness with the water stop cover, capable of suppressing intrusion of water entering from an outside into an inside.SOLUTION: A grommet 1 with a water stop cover includes: a water stop cover 10 to be attached to a vehicle body panel P; and a cylindrical grommet 20 to which a harness WH is routed. At one end of the grommet 20, a panel attachment part 50 that is attached to the water stop cover 10 and attached to the vehicle body panel P is provided. The panel attachment part includes an opposing part 51 that is fixed to the vehicle body panel P via a fixing hole P2 and faces the vehicle body panel P. An inner lip 53 that comes into contact with the vehicle body panel P and stops water in a state of being fixed to the vehicle body panel P is provided at a central portion of a facing part 51. A first groove part 54 recessed in a height direction H and a contact part 56 that comes into contact with the vehicle body panel P along the first groove part 54 at a rear end side LB of the first groove part 54 are provided toward the inner lip 53 at both end parts of the facing part 51.SELECTED DRAWING: Figure 11

Description

[Technical Field]

[0001] The present invention relates to a grommet with a waterproof cover and a harness with a waterproof cover that protect a wire harness routed in, for example, a vehicle. [Background technology]

[0002] Wire harnesses that electrically connect electrical components mounted on a vehicle are routed two-dimensionally or three-dimensionally. When a wire harness routed in this manner is inserted through an insertion hole provided in a panel such as a floor panel or a door panel, a grommet may be used to protect the wire harness from interference with the outer edge of the insertion hole.

[0003] For example, Patent Document 1 discloses a grommet with a waterproof cover, in which an attachment portion with a roughly triangular cross section provided at the end of the grommet through which a wire harness is passed is attached to a panel and covered with a waterproof cover.

[0004] However, in the grommet with a waterproof cover disclosed in Patent Document 1, gaps are likely to form at one surface of the mounting part with a roughly triangular cross section and the boundary between the waterproof cover and the panel, i.e., at the end in the width direction perpendicular to the wiring direction of the wire harness at the mounting part, and there is a risk that water that has entered from the outside will be transmitted to the inside. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-069645 Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide a grommet with a waterproof cover and a harness with a waterproof cover that can prevent water from entering from the outside into the interior.

[0007] The present invention provides a water-blocking cover that includes a cylindrical grommet and that routes a wire harness inserted into an insertion hole of a panel, and that has one end of the grommet attached to the inside and is attached to the panel. One end of the grommet is attached to the water-blocking cover and is provided with an attachment portion that is attached to the panel, and the attachment portion is fixed to the panel via a fixing hole that penetrates the panel in a thickness direction and is provided with a flat plate-shaped facing portion that faces the panel, and the water-blocking cover extends in a direction that intersects the wiring direction of the wire harness and the thickness direction. is the width direction, and a central portion of the opposing portion in the width direction is provided with a fixing portion that is fixed to the fixing hole, and a water-stopping portion that protrudes toward the panel and abuts against the panel to stop water when the fixing portion is fixed to the fixing hole, and a grommet with a water-stopping cover is provided at both end portions of the opposing portion in the width direction, with a groove portion recessed in the plate thickness direction, and an abutment portion that runs along the groove portion on the side opposite to the insertion hole and abuts against the panel when attached to the panel, facing the water-stopping portion. The present invention is also characterized by a harness with a waterproof cover, comprising the above-mentioned grommet with a waterproof cover and a wire harness inserted into the grommet.

[0008] The abutment portion may be integral with the groove portion or may be provided at a predetermined distance from the groove portion on the side opposite the insertion hole, i.e., the abutment portion may form a part of the groove portion or may be provided separately from the groove portion.

[0009] According to this invention, it is possible to prevent water from entering from the outside into the interior. Specifically, the mounting portion at one end of the cylindrical grommet through which the wire harness is routed is attached to the watertight cover and has a flat facing portion that faces the panel. The widthwise center of the facing portion has a fixing portion that is fixed to the fixing hole and a watertight portion that protrudes toward the panel and abuts against the panel to stop water from entering.

[0010] The opposing section has grooves recessed in the thickness direction up to the water-stopping section at both widthwise ends, and abutment sections that run along the grooves on the side opposite the insertion holes and abut against the panel when attached to the panel, facing the water-stopping section. This allows water that seeps in from the widthwise ends of the opposing section facing the panel to be guided into the grooves, while the abutment sections prevent water from flowing to the side opposite the insertion holes. This also prevents water from seeping in from the outside through the widthwise ends. Furthermore, water that flows along the grooves toward the center in the width direction is stopped by the water stopping portion, so water can also be prevented from entering the inside from the center part in the width direction.

[0011] In one aspect of the present invention, the water-stopping portion is arranged along the width direction and the wiring direction when viewed from the plate thickness direction, and when attached to the panel, forms a closed space, and the central end portion of the groove portion in the width direction may be inserted into the closed space.

[0012] The water stopping portion may be parallel to the width direction and the wiring direction, or may be inclined with respect to the width direction and the wiring direction or may be partially curved. Note that the closed space may be formed only by the water stopping portion, or may be formed by the water stopping portion and other components.

[0013] According to this invention, since the groove portion is inserted into the closed space formed by the water stopping portion, water that has entered the groove portion can be guided into the closed space, thereby more reliably preventing water from entering the side opposite to the insertion hole.

[0014] In another aspect of the present invention, the groove portion may be a first groove portion, and a second groove portion recessed in the plate thickness direction along the abutment portion may be provided on the side of the insertion hole of the abutment portion. With this invention, even if water flows over the abutment portion and enters the side of the abutment portion opposite the insertion hole, the second groove portion can prevent the water from flowing to the side opposite the insertion hole, thereby more reliably preventing water from entering the side opposite the insertion hole.

[0015] In another aspect of the present invention, the center end of the second groove portion in the width direction may be positioned closer to the end in the width direction than the center end of the first groove portion in the width direction. With this invention, the second groove portion along the first groove portion does not pass through the closed space, so water can be prevented from flowing into the second groove portion from the closed space through which the first groove portion passes. Therefore, water guided from the first groove portion to the water stopping portion can be prevented from entering the side opposite to the insertion hole via the second groove portion.

[0016] The grommet with watertight cover configured in this manner can guide water that has entered from both widthwise ends of the opposing portion through the first groove into a closed space formed by the watertight portion that is larger than the first groove, and can block water that has passed over the abutment portion without being guided into the closed space with the second groove.Furthermore, the water that has been guided into the closed space can be prevented from entering the side opposite the insertion hole through the second groove.

[0017] As an aspect of the present invention, the abutment portion may form a part of the groove portion. With this invention, the height from the bottom of the groove to the tip of the abutting portion is longer than the height from the main surface of the opposing portion to the tip of the abutting portion, thereby better preventing water that has entered the groove from entering the side opposite the insertion hole.

[0018] As a further aspect of the present invention, the groove portion and the abutting portion may be curved in the wiring direction as they extend in the width direction. According to this invention, by lengthening the path of the groove, it is possible to further prevent the infiltrating water from invading the opposite side.

[0019] In another aspect of the present invention, both end portions of the opposing portion in the width direction may be provided with a water-stop cover side rib that protrudes toward the opposite side from the panel and against which the water-stop cover abuts when the mounting portion is attached to the water-stop cover.

[0020] With this invention, when the mounting portion with the waterproof cover attached is attached to the panel, the waterproof cover can press the waterproof cover-side rib provided on the opposing portion toward the panel. This presses the abutment portion toward the panel, allowing the abutment portion to abut more firmly against the panel. This improves the waterproofing effect of the abutment portion and more reliably prevents water from entering the side opposite the insertion hole from the abutment portion.

[0021] As another aspect of the present invention, the water stop cover rib may be provided in correspondence with the abutment portion. According to this invention, by attaching the water blocking cover, the contact portion can be reliably contacted with the panel, thereby further improving the water blocking ability of the contact portion. [Effects of the Invention]

[0022] According to the present invention, it is possible to provide a grommet with a waterproof cover and a harness with a waterproof cover that can prevent water from entering from the outside into the interior. [Brief explanation of the drawings]

[0023] [Figure 1] FIG. 2 is a schematic perspective view of a wire harness with a waterproof cover. [Figure 2] FIG. 2 is a schematic exploded perspective view of a grommet with a waterproof cover. [Figure 3] An explanatory diagram of a watertight cover. [Figure 4] An explanatory diagram of a grommet. [Figure 5]FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] An explanatory diagram of the inner. [Figure 10] An explanatory diagram of a wire harness with a waterproof cover attached to a panel. [Figure 11] An explanatory diagram of a wire harness with a waterproof cover attached to a panel. DETAILED DESCRIPTION OF THE INVENTION

[0024] An embodiment of the present invention will be described below with reference to FIGS. Fig. 1 shows a schematic perspective view of a wire harness 2 with a waterproof cover, and Fig. 2 shows a schematic exploded perspective view of a grommet 1 with a waterproof cover. Fig. 3 shows an explanatory diagram of a watertight cover 10, Fig. 4 shows an explanatory diagram of a grommet 20, Figs. 5 to 8 show explanatory diagrams of a panel mounting portion 50, and Fig. 9 shows an explanatory diagram of an inner base 60 and an inner cover 70. Figs. 10 and 11 show explanatory diagrams of the wire harness 2 with a waterproof cover attached to a vehicle body panel P.

[0025] Figures 3 to 11 will be described in detail. Figure 3(a) shows a schematic plan view of the watertight cover 10, and Figure 3(b) shows a cross-sectional view taken along the line AA in Figure 3(a). Figure 4(a) shows a schematic side view of the grommet 20, and Figure 4(b) shows a schematic front view of the grommet 20 as viewed from the rear end side LB. Note that the other end side of the grommet 20 is not shown in Figures 1 to 11.

[0026] FIG. 5(a) shows a schematic bottom view of the panel mounting portion 50, FIG. 5(b) shows a cross-sectional view taken along the line BB in FIG. 4(b), FIG. 6(a) shows a cross-sectional view taken along the line CC in FIG. 5(a), and FIG. 6(b) shows a cross-sectional view taken along the line DD in FIG. 5(a). FIG. 7(a) shows an enlarged cross-sectional view of the area circled by the dotted line in FIG. 6(a), and FIG. 7(b) shows an enlarged cross-sectional view of the area circled by the dotted line in FIG. 6(b). FIG. 8(a) shows an enlarged bottom view of the area circled by the dotted line in FIG. 5(a), and FIG. 8(b) shows an enlarged cross-sectional view of the area circled by the dotted line in FIG. 5(a). Note that FIG. 8(b) corresponds to the cross-sectional view taken along the line EE in FIG. 5(a). 9(a) shows a schematic plan view of the inner base 60, FIG. 9(b) shows a cross section taken along the line FF in FIG. 9(a), and FIG. 9(c) shows a cross section of the inner cover 70 taken along the line FF.

[0027] Fig. 10(a) shows a schematic cross-sectional view corresponding to the cross-sectional view of the wire harness 2 with a watertight cover attached to a vehicle body panel P as seen from the arrow CC, and Fig. 10(b) shows an enlarged cross-sectional view of the area circled by a dotted line in Fig. 10(a). Fig. 11(a) shows a bottom view of the panel mounting part 50, schematically illustrating the path of water D entering the panel mounting part 50 when the wire harness 2 with a watertight cover is attached to a vehicle body panel P. Fig. 11(b) shows an enlarged view of the area circled by a dotted line in Fig. 11(a). 10 and 11, the harness WH is omitted in order to clarify the internal structure of the panel mounting portion 50.

[0028] 1 is defined as a height direction H, and a direction perpendicular to the height direction H and extending in the panel mounting portion 50 of the harness WH is defined as a wiring direction L. A direction perpendicular to the wiring direction L and the height direction H is defined as a width direction W. In addition, in FIG. 1, the left side along the wiring direction L is defined as the leading end side LA, the right side is defined as the rear end side LB, the lower side along the height direction H is defined as the lower side HD, and the upper side is defined as the upper side HU. The above-mentioned directions are the same as the corresponding directions in FIGS. 2 to 11.

[0029] 1 and 2, the grommet 1 with a waterproof cover is composed of a waterproof cover 10 that covers an insertion hole P1 that penetrates a vehicle body panel P in a height direction H, and a grommet 20 through which a harness WH is inserted. The grommet 20 also has an inner 30 housed in one end thereof.

[0030] 2, the vehicle body panel P is a panel that constitutes the body of the vehicle, and is provided with an insertion hole P1 that penetrates in the height direction H so that the grommet 20 can be inserted, and a fixing hole P2 that penetrates in the height direction H so that one end of the grommet 20 can be fixed. The lower side HD of the vehicle body panel P is the outside of the vehicle body, and the upper side HU of the vehicle body panel P is the inside of the vehicle body.

[0031] The harness WH is a wire harness made up of bundled insulated electric wires, each of which has a conductor surrounded by an insulating coating, and electrically connects electrical components mounted inside and outside the vehicle body panel P. In this embodiment, the harness WH is a wire harness made up of bundled insulated electric wires, but it may also include a communication cable or may be made up of only a plurality of communication cables.

[0032] As shown in Figures 1 and 2, the watertight cover 10 has a disk portion 11 that is disk-shaped and has a larger diameter than the insertion hole P1, and a protruding surface portion 12 that protrudes from near the end of the rear end side LB of the disk portion 11 toward the upper side HU.

[0033] As shown in Figures 3(a) and 3(b), the disk portion 11 has an upper surface portion 111 that is approximately disk-shaped in plan view and is slightly larger than the insertion hole P1 in plan view, and a locking protrusion portion 112 that protrudes from inside the outer edge of the upper surface portion 111 toward the lower side HD.

[0034] The upper surface portion 111 is a cylindrical body with a bottom that is approximately disk-shaped in a plan view and has an upper surface on the upper side HU, and near the end of the rear end side LB, a protruding surface portion 12 extends to the upper side HU so that a grommet 20 inserted through the insertion hole P1 can be passed through, as shown in Figure 3(b). Additionally, three bolt holes 113 for bolting the water stop cover 10 to the vehicle body panel P using grommet screws V are provided on the outer edge of the upper surface portion 111.

[0035] A highly flexible resin ring plate (not shown) is attached to the outer side of the locking protrusion 112 on the upper surface portion 111. The rubber ring plate attached to the upper surface portion 111 is provided with a watertight cover lip 114 that protrudes toward the lower side HD.

[0036] The locking protrusion 112 protruding from the upper surface portion 111 to the lower side HD is a plate-like body that is arc-shaped in plan view and protrudes from inside the outer edge of the upper surface portion 111 toward the lower side HD, and is configured to be able to lock onto the outer peripheral edge of the tip side LA of the insertion hole P1.

[0037] The protruding surface portion 12 extends toward the upper side HU from near the end of the rear end side LB on the upper surface portion 111. More specifically, as shown in Figures 3(a) and 3(b), the protruding surface portion 12 is composed of an arcuate surface portion 121 that extends continuously from the upper surface of the disk portion 11 toward the upper side HU, and an angular surface portion 122 that extends from the arcuate surface portion 121 toward the rear end side LB.

[0038] As shown in Figure 3(b), the arc surface portion 121 is formed in a cross section perpendicular to the width direction W, with a cross section that is approximately arc-shaped and convex toward the upper side HU, and a space through which the grommet 20 can be inserted is formed on the lower side HD.

[0039] The angular surface portion 122 is an inverted V-shaped upper surface with a corner formed on the upper side HU, and protrudes continuously from the rear end side LB end of the arc surface portion 121, which has a substantially arc-shaped cross section, toward the rear end side LB. The vertex of the angular surface portion 122 is rounded (see FIG. 2).

[0040] The grommet 20 is an exterior member that protects the harness WH that passes through the inside and outside of the vehicle body panel P, and includes a cylindrical grommet body 21 that can be fixed at both ends to the vehicle body panel P. The grommet body 21 includes a cylindrical body 40 formed in an elongated shape, and a panel mounting portion 50 that is provided on one end of the cylindrical body 40 and is mounted to the vehicle body panel P (see FIG. 2). The other end of the cylindrical body 40 is provided with another mounting portion (not shown) that is mounted to a panel other than the vehicle body panel P.

[0041] The cylindrical main body 40 is a tubular body into which the harness WH can be inserted, and as shown in Fig. 4(a), the connecting portion with the panel mounting portion 50 has a bendable bellows structure. Therefore, with the panel mounting portion 50 attached to the vehicle body panel P, the grommet 20 allows the cylindrical main body 40 to bend in a desired direction.

[0042] As shown in FIG. 4(b), the panel mounting portion 50 is a bottomed tubular body with a triangular cross section that has a bottom surface at the tip side LA connected to the cylindrical main body 40, to which the water stop cover 10 can be attached, and which can be attached to the vehicle body panel P via the inner liner 30. When the grommet with water stop cover 1 is attached to the vehicle body panel P, the panel mounting portion 50 is positioned on the lower side HD of the angular surface portion 122. Therefore, the panel mounting portion 50 is positioned so as to be sandwiched between the angular surface portion 122 and the vehicle body panel P.

[0043] 4(a) and 4(b), the panel mounting portion 50 has a substantially isosceles triangle shape when viewed from the wiring direction L. The panel mounting portion 50 is composed of a facing portion 51 that faces the vehicle body panel P when attached to the vehicle body panel P, and a pair of inclined side wall portions 52 that extend upward from both ends of the facing portion 51 in the width direction W to the upper side HU.

[0044] The facing portion 51 is a flat plate having a rectangular shape in a plan view, with the plate thickness at both ends in the width direction W being thicker than at the center portion in the width direction W (see FIGS. 5(a) and 6(b)). A through-hole 511 penetrating in the height direction H is provided in the center portion of the facing portion 51, and a locking protrusion 512 is provided at the end portion of the facing portion 51 on the tip side LA (see FIG. 4(a)).

[0045] The through hole 511 is an elongated hole having the same shape as the fixing hole P2. More specifically, the through hole 511 is an elongated hole having a substantially oval shape with a major axis along the width direction W and a minor axis along the wiring direction L when viewed from the height direction H.

[0046] The locking projection 512 is a protrusion that projects slightly downward from the outer edge of the leading end side LA of the opposing portion 51. The length from the center of the through hole 511 to the locking projection 512 is equal to the length from the center of the fixing hole P2 to the inner edge of the rear end side LB of the insertion hole P1. Therefore, when the panel mounting part 50 is mounted to the vehicle body panel P, the position of the through hole 511 coincides with the position of the fixing hole P2, and the locking projection 512 is locked to the inner edge of the rear end side LB of the insertion hole P1.

[0047] In addition, as shown in Figure 5(a), the opposing bottom surface 51a, which is the main surface of the lower side HD of the opposing portion 51, is provided with multiple inner lips 53 protruding toward the lower side HD, and a first groove portion 54 and a second groove portion 55 formed by recessing into the upper side HU.

[0048] The inner lip 53 protrudes from the opposing bottom surface 51a so as to surround a predetermined area in the center of the opposing bottom surface 51a in the width direction W. More specifically, as shown in Fig. 5(a), the inner lip 53 is composed of a width-side lip 531 extending in the width direction W and a wiring-side lip 532 extending in the wiring direction L, which are connected to each other.

[0049] 6(a) and 7(a), the width-side lip 531 is a flexible protrusion that protrudes from the opposing bottom surface 51a toward the lower side HD so as to incline toward one side or the other in the wiring direction L as it approaches the lower side HD. A plurality of width-side lips 531 configured in this manner are provided at predetermined intervals in the wiring direction L, centered on the through-hole 511. The width-side lips 531 protrude slightly toward the lower side HD beyond the end faces of both ends of the opposing bottom surface 51a in the width direction W. The width-side lips 531 may be at approximately the same height as the end faces of both end portions in the width direction W of the opposing bottom surface 51a.

[0050] 6(b) and 7(b), the wiring-side lip 532 is a flexible protruding piece that protrudes from the opposing bottom surface 51a toward the lower side HD so as to be inclined outward in the width direction W as it approaches the lower side HD. The wiring-side lip 532 protrudes from the opposing bottom surface 51a by the same length as the width-side lip 531.

[0051] The wiring-side lip 532 configured in this manner is provided to connect the ends in the width direction W of the multiple width-side lips 531 provided at predetermined intervals in the wiring direction L. That is, the multiple width-side lips 531 and the wiring-side lips 532 provide multiple inner lips 53 in a bottom view (see FIG. 5(a)). In this manner, the multiple inner lips 53 formed by the width-side lips 531 and the wiring-side lips 532 are arranged in a lattice pattern on the opposing bottom surface 51a. Here, when the grommet with waterstop cover 1 is attached to the vehicle body panel P, the space formed by the inner lip 53 is referred to as a closed space S. A through-hole 511 is provided at the center of the inner lip 53 provided in the central portion.

[0052] As shown in Figures 8(a) and 8(b), the first groove portion 54 is a groove formed by recessing the opposing bottom surface 51a at both end portions in the width direction W of the opposing bottom surface 51a, where the plate thickness is thicker than the portion where the inner lip 53 is formed. 8(a), the first groove portion 54 is a groove that meanders toward the tip side LA as it moves inward in the width direction W in a bottom view. The inner end of the first groove portion 54 in the width direction W communicates with a closed space S formed by the inner lip 53 and the opposing bottom surface 51a on the outside in the width direction W. The outer end of the first groove portion 54 in the width direction W is located inside the outer edge of the opposing portion 51 in the width direction W.

[0053] 8(b), the wall portion of the first groove portion 54 on the rear end side LB is inclined from the groove bottom toward the lower side HD toward the rear end side LB. On the other hand, the wall portion of the first groove portion 54 on the front end side LA is aligned along the height direction H so as to be perpendicular to the groove bottom.

[0054] Similar to the first groove portion 54, the second groove portion 55 is a groove formed by recessing the opposing bottom surface 51a at both end portions of the opposing bottom surface 51a in the width direction W, and is provided along the first groove portion 54. More specifically, as shown in FIG. 8(a), the second groove portion 55 is a groove that meanders toward the tip side LA along the first groove portion 54 as it moves inward in the width direction W in bottom view.

[0055] Unlike the first groove portion 54, the inner end portion of the second groove portion 55 in the width direction W does not communicate with the closed space S. That is, the inner end portion of the second groove portion 55 in the width direction W is located outside the width direction W of the closed space S with which the first groove portion 54 communicates. Note that, like the first groove portion 54, the outer end portion of the second groove portion 55 in the width direction W is located inside the outer edge of the facing portion 51 in the width direction W.

[0056] 8(b), the wall portion of the second groove portion 55 on the leading end side LA, i.e., the wall portion on the side of the first groove portion 54, is inclined from the groove bottom toward the downward side HD toward the first groove portion 54. On the other hand, the wall portion of the second groove portion 55 on the trailing end side LB is formed so as to be perpendicular to the groove bottom.

[0057] Between the first groove portion 54 and the second groove portion 55 configured in this manner, as shown in Figure 8 (b), a contact portion 56 is provided that protrudes from the groove bottoms of the first groove portion 54 and the second groove portion 55 toward the lower side HD. More specifically, the abutment portion 56 is a wall that separates the first groove portion 54 and the second groove portion 55 in the wiring direction L, and is configured to taper downward toward the lower side HD. Therefore, the tip portion of the abutment portion 56 is easily deformed when pressed against the vehicle body panel P. The tip portion of the abutment portion 56 is configured to be flush with both end portions of the opposing bottom surface 51a in the width direction W.

[0058] On the other hand, a pressing rib 57 that protrudes toward the upper side HU is provided on the upper facing surface 51b, which is the main surface of the upper side HU of the facing portion 51 (see FIG. 5(a)). The pressing rib 57 is a rib formed linearly in a plan view, and as shown in Fig. 7(a) , in a cross section perpendicular to the longitudinal direction and crossing the pressing rib 57 and the inner lip 53, it has a tapered shape toward the upper side HU. More specifically, the pressing rib 57 has a curved cross section in which the base end side is gently curved, rises sharply from the central portion, and is also gently curved at the tip end. The width of the base end portion of the pressing rib 57 is greater than the width of the inner lip 53.

[0059] Furthermore, as shown in Figures 7(a) and 7(b), in a cross section perpendicular to the longitudinal direction, the center of the base end portion (the connection portion with the lower side HD) of the pressing rib 57 coincides with the center of the base end portion (the connection portion with the upper side HU) of the width side lip 531 and the routing side lip 532.

[0060] The pressing rib 57 thus configured includes a width-side rib 571 extending in the width direction W and a wiring-side rib 572 extending in the wiring direction L (see FIG. 5(b)). The width-side ribs 571 are provided to correspond to the width-side lips 531. Specifically, the width-side ribs 571 are provided on the upper side HU from the facing surface 51b to correspond to the central part of the straight part of the width-side lip 531 extending in the width direction W.

[0061] On the other hand, the wiring-side rib 572 is provided to correspond to the wiring-side lip 532. Specifically, the wiring-side rib 572 is provided on the upper side HU of the center of the straight portion of the wiring-side lip 532 extending in the wiring direction L. In other words, the wiring-side rib 572 is not connected to both ends of the width-side rib 571 in the width direction W.

[0062] The inclined side wall portions 52 are side walls that extend inward in the width direction W from both ends of the opposing portion 51 in the width direction W while inclining inward in the width direction W. That is, the pair of inclined side wall portions 52 are connected at the upper side HU in the center of the opposing portion 51 in the width direction W. The connecting portion of the pair of inclined side wall portions 52 is chamfered.

[0063] The inclined side wall portion 52 is provided with three protruding portions 521 protruding toward the upper side HU along the width direction W at predetermined intervals in the wiring direction L. The protrusion 521 is convex on the upper side HU when viewed from the rear end side LB, and has a roughly inverted V-shape with a rounded tip (see Figure 4(b)), and when the grommet 1 with watertight cover is fixed to the vehicle body panel P, it abuts against the inner surface of the angular surface portion 122.

[0064] The protruding height of the protruding portion 521 configured in this manner increases from the leading end side LA to the trailing end side LB. Of the three protruding portions 521 lined up in the wiring direction L, the middle protruding portion 521 is provided at a position corresponding to the abutting portion 56, more specifically, at a position slightly rearward of the abutting portion 56 at LB (see FIG. 8(b)). Furthermore, at the connecting portion of the pair of inclined sidewall portions 52, a harness fixing portion 522 for fixing with tape the harness WH having the grommet 20 inserted therethrough extends along the wiring direction L (see FIG. 4(a)).

[0065] The inner 30 is a cylindrical body with a substantially triangular cross section so that it can be housed inside the panel mounting portion 50, which is formed with a triangular cross section, and is made of a resin material with higher rigidity than the cylindrical main body 40. In more detail, the inner 30, in the housed state, is made up of an inner base 60 that is placed in the opposing portion 51, and an inner cover 70 that is attached to the upper side HU of the inner base 60 (see FIG. 2).

[0066] As shown in Figures 9(a) and 9(b), the inner base 60 is composed of a bottom surface portion 61 which is the bottom surface of the inner 30, a fixed portion 62 which protrudes from the center of the bottom surface portion 61 to the lower side HD, and a pair of upright portions 63 which stand upright from the bottom surface portion 61 to the upper side HU.

[0067] The bottom surface portion 61 is a flat plate that is slightly smaller than the facing portion 51 and has a rectangular shape in a plan view. The fixing portion 62 is an anchor that protrudes from the center portion of the bottom surface portion 61 toward the lower side HD, and is configured to be inserted through the through-hole 511 and be locked and fixed to the fixing hole P2.

[0068] The standing portion 63 is a locked portion that is locked and fixed to the inner cover 70. More specifically, the standing portion 63 is composed of a pair of standing walls 631 that stand at a predetermined interval in the width direction W, reinforcing ribs 632 provided on the outer sides of the standing walls 631 in the width direction W, and locking walls 633 that are arranged in parallel on the outer sides of the standing walls 631 in the width direction W.

[0069] As shown in Figures 9(a) and 9(b), the standing wall 631 is a wall that stands from the bottom surface portion 61 to the upper side HU on both sides of the center in the width direction W, and is provided from the end of the front end side LA of the bottom surface portion 61 to the vicinity of the end of the rear end side LB.

[0070] The reinforcing ribs 632 are ribs that connect the outer end surface of the standing wall 631 in the width direction W to the bottom surface portion 61, and four of them are provided at predetermined intervals in the wiring direction L. When viewed from the wiring direction L, the reinforcing ribs 632 have a substantially right-angled trapezoidal shape having oblique sides that are inclined at the same angle as the inclined side wall portions 52 on the outer side in the width direction W.

[0071] The locking wall 633 is a plate-like body that connects the four reinforcing ribs 632 provided in the wiring direction L in the wiring direction L, and is provided at the inner end in the width direction W of the oblique side portion of the trapezoidal reinforcing rib 632. A gap is provided between the locking wall 633 and the bottom surface portion 61.

[0072] As shown in Figure 9(c), the inner cover 70 is configured with an inner side wall 71 that is convex on the upper side HU when viewed from the rear end side LB and has a roughly inverted V shape with a chamfered tip, and a pair of engagement portions 72 that protrude from the inner side wall 71 toward the lower side HD.

[0073] The inner side wall 71 is inclined at the same inclination angle as the inclined side wall portion 52 , and abuts against the inner surface of the inclined side wall portion 52 when the inner 30 is housed in the panel mounting portion 50 . The locking portion 72 is a locking piece that protrudes downward from the rear surface side of the inner side wall 71 toward the lower side HD, and is configured to be inserted between the standing wall 631 and the locking wall 633 so as to be locked to the locking wall 633.

[0074] The inner base 60 and inner cover 70 configured in this manner constitute the inner 30 by engaging the locking portion 72 with the locking wall 633. Then, by inserting the fixing portion 62 into the through hole 511 in the panel mounting portion 50, the inner 30 made up of the inner base 60 and inner cover 70 can be housed in the panel mounting portion 50. In other words, the grommet 20 is formed by attaching the inner 30 to the grommet body 21.

[0075] Then, the harness WH is inserted through the inner liner 30 and the cylindrical main body 40 housed in the panel mounting portion 50, and the harness WH is fixed to the harness fixing portion 522 with tape, thereby attaching the harness WH to the grommet 20. In this way, the harness 3 with a waterproof cover can be manufactured, which includes the grommet 20 and the harness WH inserted into the grommet main body 21.

[0076] Furthermore, the harness 3 with the watertight cover, in which the harness WH is attached to the grommet 20, can have the cylindrical body 40 inserted into the insertion hole P1, and the fixing portion 62 inserted into the through hole 511 engaged and fixed to the fixing hole P2 from the upper side HU. At this time, the engaging protrusion 512 engages with the outer edge of the rear end side LB of the insertion hole P1. In this manner, with the panel mounting portion 50 attached to the vehicle body panel P, the watertight cover 10 is bolted to the vehicle body panel P so that the disc portion 11 covers the insertion hole P1.

[0077] Specifically, the watertight cover 10 is placed so that the panel mounting portion 50 corresponds to the protruding surface portion 12, and the locking protrusion 112 is inserted into the insertion hole P1 to lock it in place. Then, a tapping bolt (not shown) is inserted into the bolt hole 113 and bolted to the grommet screw V. This allows the watertight cover-equipped wire harness 2, in which the harness WH is inserted through the watertight cover-equipped grommet 1, to be attached to the vehicle body panel P (see FIG. 1).

[0078] In the wire harness 2 with a waterproof cover attached to the vehicle body panel P in this manner, the panel mounting portion 50 is pressed against the lower side HD, thereby preventing water from entering toward the rear end side LB. More specifically, when the wire harness 2 with a waterproof cover is attached to the vehicle body panel P, an external force F that presses the facing portion 51 against the lower HD acts on the inner 30. As a result, as shown in Figures 10(a) and 10(b), the bottom surface portion 61 presses the pressing rib 57 against the lower HD.

[0079] By pressing the pressing rib 57 against the lower side HD in this manner, the external force F of the lower side HD can be efficiently applied to the inner lip 53 provided directly below the pressing rib 57. As a result, the inner lip 53 can be pressed against the vehicle body panel P so that it deforms and comes into contact with the vehicle body panel P. Therefore, water D that has entered through the fixing hole P2 is blocked by the inner lip 53 that is in contact with the vehicle body panel P, and is prevented from flowing toward the rear end side LB (see FIG. 10(b)). Similarly, water D that has entered through the central portion of the insertion hole P1 in the width direction W is blocked by the width-side lip 531 provided along the width direction W at the front end side LA, and is therefore prevented from flowing toward the rear end side LB.

[0080] In addition, water D that penetrates from the insertion hole P1 toward the rear end side LB and flows along both end portions of the opposing portion 51 in the width direction W flows into the first groove portion 54, which is formed by recessing the opposing bottom surface 51a in the height direction H, in the central portion in the wiring direction L, as shown in Figures 11(a) and 11(b).

[0081] Here, when the water stop cover 10 is fixed to the vehicle body panel P with bolts, a fastening force is transmitted to and acts on the protruding surface portion 12 toward the lower side HD. As a result, the panel mounting portion 50, which is arranged on the lower side HD of the protruding surface portion 12, is pressed into the lower side HD by the protruding surface portion 12. As a result, the fastening force is transmitted to and acts on the protruding portion 521 that abuts against the protruding surface portion 12 toward the lower side HD, and the abutting portion 56, which forms the wall portion of the rear end side LB of the first groove portion 54, as well as both end sides in the width direction W of the opposing bottom surface 51a, are pressed against the vehicle body panel P. As a result, the water D that has flowed into the first groove portion 54 is blocked by the abutting portion 56 from flowing toward the rear end side LB. This prevents the water D from flowing toward the rear end side LB.

[0082] Furthermore, as shown in Figure 11(b), the water D that has flowed into the first groove portion 54 flows into the closed space S along the first groove portion 54, which meanders inward in the width direction W, but the inner lip 53 that forms the closed space S is pressed against the vehicle body panel P by the pressing rib 57. This makes it possible to prevent the water D from flowing from the closed space S toward the rear end side LB.

[0083] Even if water D leaks from the contact portion 56 to the rear end side LB, the water D flows into the second groove portion 55 provided along the first groove portion 54, and therefore, the water D can be more reliably prevented from flowing to the rear end side LB. Note that the second groove portion 55 along the first groove portion 54 does not communicate with the closed space S, and therefore the water D that has flowed into the closed space S will not flow into the second groove portion 55.

[0084] The grommet 1 with a waterproof cover configured as described above includes a cylindrical grommet 20 for routing a harness WH therein to be inserted into an insertion hole P1 of a vehicle body panel P, and a waterproof cover 10 that has one end portion of the grommet 20 attached to the interior and is attached to the vehicle body panel P. One end of the grommet 20 is provided with a panel mounting portion 50 that is attached to the waterproof cover 10 and is attached to the vehicle body panel P. The panel mounting portion 50 is fixed to the vehicle body panel P through a fixing hole P2 that penetrates the vehicle body panel P in the height direction H, and is provided with a flat opposing portion 51 that faces the vehicle body panel P. A fixing portion 62 is provided in a central portion of the opposing portion 51 in the width direction W, via an inner 30 that is housed in the panel mounting portion 50 and that is fixed to the fixing hole P2. Furthermore, when the fixing portion 62 is fixed to the fixing hole P2, the facing portion 51 is provided with an inner lip 53 that protrudes toward the vehicle body panel P and abuts against the vehicle body panel P to seal off water. At both end portions in the width direction W of the facing portion 51, there are provided a first groove portion 54 that is recessed in the height direction H, and a contact portion 56 that faces the inner lip 53 and runs along the first groove portion 54 on the side opposite to the insertion hole P1 of the first groove portion 54 and abuts against the vehicle body panel P when attached to the vehicle body panel P. The wire harness 2 with a waterproof cover includes the grommet 1 with a waterproof cover and a harness WH inserted into the grommet 20.

[0085] The grommet 1 with a waterproof cover and the wire harness 2 with a waterproof cover configured in this manner can prevent water D from entering from the outside. More specifically, the panel mounting portion 50 provided at one end of the cylindrical grommet 20, inside which the harness WH is routed, is attached to the watertight cover 10 and has a flat opposing portion 51 that faces the vehicle body panel P. The central portion of the opposing portion 51 in the width direction W is provided with a fixing portion 62 that is fixed to the fixing hole P2, and an inner lip 53 that protrudes toward the vehicle body panel P and abuts against the vehicle body panel P to seal off water.

[0086] At both end portions in the width direction W of the facing portion 51, there are provided first groove portions 54 recessed in the height direction H up to the inner lip 53, and on the side of the first groove portion 54 opposite the side of the insertion hole P1, there are provided contact portions 56 that extend along the first groove portion 54 and contact the vehicle body panel P when the facing portion 51 is attached to the vehicle body panel P, and that face the inner lip 53. Therefore, water D that has entered from the end portion in the width direction W of the facing portion 51 that faces the vehicle body panel P can be guided to the first groove portions 54, and the contact portions 56 can prevent the water D from flowing to the side opposite the side of the insertion hole P1. Therefore, water D that has entered from the outside via both end portions in the width direction W can also be prevented from entering inside. Furthermore, water D flowing along the first groove portion 54 toward the center in the width direction W is stopped by the inner lip 53, so water D can also be prevented from entering the inside from the center part in the width direction W.

[0087] In addition, the inner lip 53 is arranged along the width direction W and the wiring direction L when viewed from the height direction H, and when attached to the vehicle body panel P, it forms a closed space S, and the central end portion of the first groove portion 54 in the width direction W is inserted into the closed space S formed by the inner lip 53.

[0088] In this way, the first groove portion 54 is inserted into the closed space S formed by the inner lip 53, and therefore the water D that has entered the first groove portion 54 can be guided into the closed space S. Therefore, it is possible to more reliably prevent the water D from entering the rear end side LB.

[0089] Furthermore, a second groove portion 55 recessed in the height direction H is provided along the abutment portion 56 on the side of the insertion hole P1 (rear end side LB). As a result, even if the water D flows over the abutment portion 56 and enters the rear end side LB of the abutment portion 56, the second groove portion 55 can prevent the water D from flowing to the rear end side LB. Therefore, the water D can be more reliably prevented from entering the rear end side LB.

[0090] Furthermore, the central end of the second groove 55 in the width direction W is positioned closer to the end in the width direction W than the central end of the first groove 54 in the width direction W. In other words, the second groove 55 along the first groove 54 does not pass through the closed space S. This prevents water D from flowing into the second groove 55 from the closed space S through which the first groove 54 passes. This prevents the water D guided from the first groove 54 to the inner lip 53 from entering the rear end side LB via the second groove 55.

[0091] The grommet 1 with watertight cover and the wire harness 2 with watertight cover configured in this manner can guide water D that has entered from both end portions in the width direction W of the opposing portion 51 through the first groove portion 54 into the closed space S formed by the inner lip 53, which is wider than the first groove portion 54, and can block water D that has passed over the abutting portion 56 without being guided into the closed space S with the second groove portion 55. Furthermore, the water D that has been guided into the closed space S can be prevented from entering the rear end side LB through the second groove portion 55.

[0092] Furthermore, since the contact portion 56 forms part of the first groove portion 54, the height from the groove bottom to the tip of the contact portion 56 is longer than the height from the main surface (opposing bottom surface 51a) of the opposing portion 51 to the tip of the contact portion 56. This makes it possible to further prevent water D that has entered the first groove portion 54 from entering the side opposite to the insertion hole P1.

[0093] Furthermore, the first groove portion 54 and the abutment portion 56 are curved in the wiring direction L as they extend in the width direction W, thereby lengthening the path of the first groove portion 54. This makes it possible to further prevent the infiltrating water D from entering the rear end side LB.

[0094] In addition, at both end portions of the opposing portion 51 in the width direction W, there are provided protruding portions 521 that protrude toward the opposite side of the vehicle body panel P and against which the water-stop cover 10 abuts when the panel mounting portion 50 is attached to the water-stop cover 10.

[0095] As a result, when the panel mounting portion 50 with the water stop cover 10 attached thereto is attached to the vehicle body panel P, the water stop cover 10 can press the protruding portion 521 provided on the facing portion 51 toward the downward side HD. This causes the abutting portion 56 to be pressed toward the vehicle body panel P, allowing the abutting portion 56 to abut more strongly against the vehicle body panel P. This improves the water stop performance of the abutting portion 56, and more reliably prevents water D from entering the side opposite the insertion hole P1 from the abutting portion 56.

[0096] Furthermore, since the protrusions 521 are provided corresponding to the abutment portions 56, when the water stop cover 10 is attached, the abutment portions 56 can be reliably abutted against the vehicle body panel P. Therefore, the water stop performance of the abutment portions 56 can be further improved.

[0097] In the correspondence between the configuration of this invention and the above-mentioned embodiment, the panel of this invention corresponds to the vehicle body panel P, and similarly, The wire harness is compatible with Harness WH. The grommet is compatible with grommet 20. The waterproof cover is compatible with the waterproof cover 10. The mounting portion corresponds to the panel mounting portion 50, The thickness direction corresponds to the height direction H, The fixing hole corresponds to the fixing hole P2, The opposing portion corresponds to the opposing portion 51, The wiring direction corresponds to the wiring direction L, The width direction corresponds to the width direction W, The fixed portion corresponds to the fixed portion 62, The waterproof part is compatible with the inner lip 53. The groove corresponds to the first groove 54, The abutment portion corresponds to the abutment portion 56, The grommet with waterproof cover is compatible with the grommet with waterproof cover 1. The second groove portion corresponds to the second groove portion 55, The rib on the water stop cover corresponds to the protrusion 521, The harness with a waterproof cover corresponds to the wire harness with a waterproof cover 2, but the present invention is not limited to the configuration of the above-described embodiment, and many other embodiments can be obtained.

[0098] For example, in the present embodiment, the abutment portion 56 is a wall portion that constitutes part of the first groove portion 54 and the second groove portion 55, but is not limited to this, and may be, for example, a convex portion provided at a predetermined interval on the rear end side LB of the first groove portion 54. In other words, the abutment portion 56 may not only form part of the first groove portion 54, but may also be provided as a separate body from the first groove portion 54.

[0099] In this embodiment, the width-side lip 531 and the routing-side lip 532 are aligned along the width direction W and the routing direction L. More specifically, some of the width-side lip 531 and the routing-side lip 532 are partially curved. However, the width-side lip 531 and the routing-side lip 532 are not particularly limited in shape as long as they form a closed space S that can suppress the movement of water D toward the rear end side LB. [Explanation of symbols]

[0100] 1...Grommet with waterproof cover 2...Wire harness with waterproof cover 10...Waterproof cover 20...Grommet 50...Panel mounting section 51...opposing part 53...Inner lip 54...First groove part 55...Second groove part 56...Contact part 62…Fixed part 521...Protruding part H: Height L…Routing direction P...Body panel W: Width direction P2…Fixing hole WH...Harness

Claims

1. a cylindrical grommet for routing a wire harness therein to be inserted into an insertion hole provided in the panel; a waterproof cover attached to the panel and having one end portion of the grommet attached to the inside, One end of the grommet is provided with an attachment portion that is attached to the water stop cover and is attached to the panel, The mounting portion is fixed to the panel via a fixing hole that penetrates the panel in a thickness direction, and is provided with a flat plate-shaped opposing portion that faces the panel, a width direction of the wire harness, the width direction being a direction intersecting the wiring direction of the wire harness and the plate thickness direction; In the center portion of the facing portion in the width direction, a fixing portion fixed to the fixing hole; A water stop portion is provided that protrudes toward the panel and abuts against the panel to stop water when the fixing portion is fixed to the fixing hole. At both end portions in the width direction of the facing portion, A groove portion recessed in the plate thickness direction; a contact portion that is provided along the groove portion on the side opposite to the insertion hole side of the groove portion and that contacts the panel when attached to the panel, facing the water stopping portion; Grommet with waterproof cover.

2. The water-stopping portion is provided along the width direction and the wiring direction when viewed from the plate thickness direction, and forms a closed space when attached to the panel, The end portion of the groove on the center side in the width direction is inserted into the closed space. The grommet with a waterproof cover according to claim 1.

3. The groove portion is a first groove portion, A second groove portion recessed in the plate thickness direction is provided along the contact portion on the side of the insertion hole. The grommet with a waterproof cover according to claim 2.

4. The center end of the second groove portion in the width direction is disposed closer to the end in the width direction than the center end of the first groove portion in the width direction. The grommet with a waterproof cover according to claim 3.

5. The abutment portion forms a part of the groove portion. The grommet with a waterproof cover according to claim 2.

6. The groove portion and the abutting portion are curved in the wiring direction as they extend in the width direction. The grommet with a waterproof cover according to claim 5.

7. The opposite end portions of the facing portion in the width direction are provided with water stop cover-side ribs that protrude toward the opposite side from the panel and against which the water stop cover abuts when the mounting portion is attached to the water stop cover. The grommet with a waterproof cover according to claim 1.

8. The water stop cover side rib is provided corresponding to the abutment portion. The grommet with a waterproof cover according to claim 7.

9. The grommet with a waterproof cover according to claim 1; and a wire harness inserted into the grommet. Harness with waterproof cover.

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