Grommet and harness with grommet

Abstract

To provide a grommet and a harness with the grommet that can improve a water-retaining performance.SOLUTION: A grommet 20 includes a grommet main body 21 for routing a harness WH, and an inner 30 accommodated in the grommet main body 21. At one end of the grommet main body 21, a panel attachment part 50 for accommodating the inner 30 and attached to a vehicle body panel P is provided. The panel attachment portion 50 is provided with a through hole 511 penetrating in a height direction H, and a flat plate-shaped opposed portion 51 opposed to the vehicle body panel P. The inner 30 is provided with a fixing part 62 which is inserted into the through hole 511 and inserted into and fixed to a fixing hole P2 provided in the vehicle body panel P. The facing part 51 is provided with an inner lip 53 which protrudes toward the vehicle body panel P and comes into contact with the vehicle body panel P to stop water, and a pressing rib 54 which protrudes toward the inner 30 at a position corresponding to the inner lip 53.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a grommet and a grommet-equipped harness for protecting 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] As an example of such a grommet, Patent Document 1 discloses a grommet that is composed of a grommet body through which a wire harness is passed and an inner liner that is assembled to an attachment portion provided at the end of the grommet body and fixed to a fixing hole provided in a panel, and in which the end of the grommet body can be fixed to the panel via the inner liner.

[0004] The mounting part fixed to the panel is provided with a water stop part that abuts against the panel to prevent water from seeping in through the fixing holes, which is said to be able to prevent water from seeping into the interior of the vehicle. However, in cases such as high-pressure washing where water is sprayed forcefully, there is a risk that water that has seeped in through the fixing holes may seep inside, so it is desirable to improve the water stop function. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-086963 Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide a grommet and a harness with a grommet that can improve watertightness. [Means for solving the problem]

[0007] This invention is characterized in that it comprises a cylindrical grommet body for routing a wire harness inside, and an inner liner that is housed in the grommet body and fixes the grommet body to a panel, one end of the grommet body is provided with an attachment portion that houses the inner liner and is attached to the panel, the attachment portion is provided with a through hole that penetrates in the plate thickness direction and is provided with a flat opposing portion that faces the panel, the inner liner is provided with a fixing portion that is inserted into the through hole and inserted into a fixing hole provided in the panel to fix it, the opposing portion is provided with 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, at least one of the opposing portion and the inner liner is provided with a rib that protrudes toward the other, and the rib is a grommet that is arranged at a position corresponding to the water-stopping portion. The present invention is also characterized by a grommet-equipped harness including the above-mentioned grommet and a wire harness inserted into the grommet body.

[0008] The term "positioned opposite the water stop portion" as mentioned above means that at least a portion of the rib is positioned on the opposite side of the water stop portion in a cross section that crosses the rib and the water stop portion. In other words, this includes cases where the rib is wider or narrower than the water stop portion in the cross section, or where the center position of the rib is shifted in the width direction relative to the water stop portion.

[0009] According to the present invention, it is possible to improve the water stopping property. More specifically, the mounting portion provided at one end of the cylindrical grommet body through which the wire harness is routed houses the inner member and has a flat opposing portion facing the panel. The inner member is provided with a fixing portion that is inserted into a through-hole provided in the mounting portion and fixed to the fixing hole. At least one of the opposing portion and the inner member has a rib extending toward the other side when the fixing portion is fixed to the fixing hole. In other words, the rib is provided on the side opposite the waterproofing portion.

[0010] As a result, when the mounting portion is fixed to the panel, the waterproofing portion is efficiently pressed by the rib, allowing the waterproofing portion to abut against the panel reliably, thereby improving the waterproofing performance of the waterproofing portion.

[0011] In addition, the load applied to press the mounting portion into the panel, as if inserting the fixing portion into the fixing hole, is transmitted to the watertight portion while deforming the rib. In a grommet in which the other of the facing portion and the inner portion abuts the tip of the rib, the repulsive force against the load can be made gentler than in a grommet in which the facing portion and the inner portion are in surface contact without a rib. This improves the ease of insertion of the fixing portion.

[0012] As an aspect of the present invention, the rib may be provided on the opposing portion. With this invention, since both the rib and the water stop portion are provided on the opposing portion, the water stop portion and the rib do not become misaligned when the inner liner is housed in the mounting portion. Therefore, when fixed, the water stop portion can be reliably pressed against the panel, further improving the water stop effect of the water stop portion.

[0013] As another aspect of the present invention, the rib may be configured to have a tapered shape that tapers in the protruding direction. The rib may have a cross-sectional shape in a direction perpendicular to the protruding direction that is generally trapezoidal, or may have an arc shape that curves gently or sharply as it extends in the protruding direction.

[0014] According to this invention, the ribs are configured to widen toward the water-stopping portion, which allows the load to be transmitted to the water-stopping portion more efficiently. Therefore, in the fixed state, the ribs can reliably press against the water-stopping portion, further improving the water-stopping ability of the water-stopping portion.

[0015] As another aspect of the present invention, in a cross section that crosses the rib and the water stopping portion, the center of the rib may coincide with the center of the water stopping portion. According to this invention, the load applied to the rib can be efficiently transmitted to the water stopping portion without waste, thereby reliably improving the water stopping ability of the water stopping portion.

[0016] As another aspect of the present invention, a plurality of the water stopping portions may be provided at predetermined intervals in the routing direction of the wire harness, and a plurality of the ribs may be provided corresponding to the water stopping portions. This invention allows the load applied to the multiple ribs to be applied to the multiple water stop portions, ensuring that each water stop portion abuts against the panel, thereby further improving water stop performance at least in the installation direction where the multiple water stop portions are provided.

[0017] In another aspect of the present invention, the water-stopping portion may be formed in a rectangular shape so as to surround the through hole and extend along a cross direction that crosses the wiring direction of the wire harness and along the wiring direction when viewed from the insertion direction of the fixing portion, and the rib may include a first rib corresponding to the water-stopping portion along the wiring direction, and a second rib corresponding to the water-stopping portion along the cross direction and not in contact with the first rib.

[0018] 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.

[0019] This invention allows the water stop portion along the wiring direction corresponding to the first rib and the water stop portion along the cross direction corresponding to the second rib to be reliably abutted against the panel. In other words, the portions corresponding to the sides of the rectangular water stop portion can be reliably abutted against the panel. This further improves the water stop performance of the water stop portion.

[0020] Furthermore, the first and second ribs are not provided at the intersections with the water stopper along the wiring direction and the intersecting direction, i.e., at the corners of the rectangular water stopper where rigidity is relatively high. Therefore, the load applied during installation is applied via the first and second ribs to the installation part at a location other than the intersection, allowing the water stopper to be securely attached to the panel.

[0021] Furthermore, because the first and second ribs are not provided at the corners of the waterproofing part, which has a relatively high rigidity, the repulsive force when a load is applied can be reduced, thereby preventing a decrease in the ease of inserting the fixing part into the fixing hole.

[0022] As another aspect of the present invention, the mounting portion may be configured in a triangular shape when viewed from the routing direction of the wire harness, and the inner may be configured in a triangular shape that can be fitted into the mounting portion. This invention allows the load applied to the mounting portion to be applied to the rib via the inner liner, thereby more reliably improving the watertightness of the watertight portion and allowing the mounting portion to be attached to the panel. [Effects of the Invention]

[0023] According to the present invention, it is possible to provide a grommet and a harness with a grommet that can improve watertightness. [Brief explanation of the drawings]

[0024] [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] An explanatory diagram of the inner. [Figure 9] An explanatory diagram of a wire harness with a waterproof cover attached to a panel. DETAILED DESCRIPTION OF THE INVENTION

[0025] 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 7 show explanatory diagrams of a panel mounting portion 50, and Fig. 8 shows an explanatory diagram of an inner base 60 and an inner cover 70. Fig. 9 shows an explanatory diagram of the wire harness 2 with a waterproof cover attached to a vehicle body panel P.

[0026] Figures 3 to 9 will be described in detail. Figure 3(a) shows a schematic plan view of the water stop 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 9.

[0027] 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 a schematic plan view of the inner base 60, Fig. 8(b) shows a cross-sectional view taken along the line FF in Fig. 8(a), and Fig. 8(c) shows a cross-sectional view of the inner cover 70 corresponding to the cross-sectional view taken along the line FF.

[0028] Figure 9(a) shows a schematic cross-sectional view corresponding to the cross-sectional view along the CC arrow of the wire harness 2 with a waterproof cover attached to a vehicle body panel P, and Figure 9(b) shows an enlarged cross-sectional view of the area surrounded by the dotted circle in Figure 9(a). In FIG. 9, the harness WH is omitted in order to clarify the internal structure of the panel mounting portion 50.

[0029] 1 is defined as a height direction H, and a direction perpendicular to the height direction H and extending in which the harness WH routed in the panel mounting portion 50 is defined as a wiring direction L. A direction perpendicular to the routing direction L and the height direction H is defined as a width direction W. In addition, in FIG. 1, the left side along the routing 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 9.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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 cover lip 114 that protrudes toward the lower side HD.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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).

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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)).

[0046] 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.

[0047] 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.

[0048] As shown in FIG. 5(a), a plurality of inner lips 53 protruding toward the lower side HD are provided on the opposing bottom surface 51a, which is the main surface of the lower side HD of the opposing portion 51. 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 form 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, the space formed by the inner lip 53 is referred to as a closed space S. A through-hole 511 is arranged at the center of the inner lip 53 provided in the central portion.

[0052] On the other hand, a pressing rib 54 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 54 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 54 and the inner lip 53, it has a tapered shape toward the upper side HU. More specifically, the pressing rib 54 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 54 is greater than the width of the inner lip 53.

[0053] 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 54 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.

[0054] The pressing rib 54 thus configured includes a width-side rib 541 extending in the width direction W and a wiring-side rib 542 extending in the wiring direction L (see FIG. 5(b)). The width-side ribs 541 are provided to correspond to the width-side lips 531. Specifically, the width-side ribs 541 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.

[0055] On the other hand, the wiring-side rib 542 is provided to correspond to the wiring-side lip 532. Specifically, the wiring-side rib 542 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 542 is not connected to both ends of the width-side rib 541 in the width direction W.

[0056] 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.

[0057] 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 upward on the upper side HU when viewed from the rear end side LB, and has a generally inverted V-shape with a rounded tip (see FIG. 4(b)), and comes into contact with the inner surface of the angular surface portion 122 when the watertight cover-equipped grommet 1 is fixed to the vehicle body panel P. The protrusion 521 configured in this manner has a protruding height that increases from the tip side LA toward the rear end side LB. 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)).

[0058] 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).

[0059] As shown in Figures 8(a) and 8(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.

[0060] 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.

[0061] 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.

[0062] As shown in Figures 8(a) and 8(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 width direction W outside the center of 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.

[0063] 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.

[0064] 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.

[0065] As shown in Figure 8(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.

[0066] 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.

[0067] 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.

[0068] 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 grommet-equipped harness 3 including the grommet 20 and the harness WH inserted into the grommet main body 21 can be manufactured.

[0069] Furthermore, the grommet-equipped harness 3, 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. With the panel mounting portion 50 attached to the vehicle body panel P in this manner, the water stop cover 10 is bolted to the vehicle body panel P so that the disc portion 11 covers the insertion hole P1.

[0070] 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).

[0071] 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 opposing portion 51 against the lower HD acts on the inner 30. As a result, as shown in Figures 9(a) and 9(b), the bottom surface portion 61 presses the pressing rib 54 against the lower HD.

[0072] By pressing the pressing rib 54 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 54. 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. 9(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.

[0073] The grommet 20 configured as described above includes a cylindrical grommet body 21 through which a harness WH is routed, and an inner liner 30 that is housed in the grommet body 21 and secures the grommet body 21 to a vehicle body panel P. One end of the grommet body 21 is provided with a panel mounting portion 50 that houses the inner liner 30 and is attached to the vehicle body panel P. The panel mounting portion 50 is provided with a through-hole 511 that penetrates in the height direction H and is provided with a flat opposing portion 51 that faces the vehicle body panel P. The inner liner 30 is provided with a fixing portion 62 that is inserted into the through-hole 511 and inserted into a fixing hole P2 provided in the vehicle body panel P for fixing. The opposing portion 51 is provided with an inner lip 53 that protrudes toward the vehicle body panel P when the fixing portion 62 is fixed to the fixing hole P2 and that abuts against the vehicle body panel P to seal off water, and a pressing rib 54 that protrudes toward the inner liner 30. The pressing rib 54 is disposed at a position corresponding to the inner lip 53 . The grommet-equipped harness 3 includes a grommet 20 and a harness WH inserted into a grommet body 21.

[0074] The grommet 20 and the grommet-equipped harness 3 configured in this manner can improve the waterproofing properties. More specifically, the panel mounting portion 50 provided at one end of the cylindrical grommet body 21, through which the harness WH is routed, accommodates the inner liner 30 and is provided with a flat opposing portion 51 that faces the vehicle body panel P. The inner liner 30 is also provided with a fixing portion 62 that is inserted into a through-hole 511 provided in the panel mounting portion 50 and fixed to the fixing hole P2. A pressing rib 54 is erected on the opposing portion 51 toward the inner liner 30 in a fixed state in which the fixing portion 62 is fixed to the fixing hole P2. In other words, the pressing rib 54 is provided on the opposite side of the inner lip 53.

[0075] As a result, in a fixed state in which the panel mounting portion 50 is fixed to the vehicle body panel P, the inner lip 53 is efficiently pressed via the pressing rib 54, allowing the inner lip 53 to reliably abut against the vehicle body panel P. Therefore, the water-stopping ability of the inner lip 53 can be improved.

[0076] Furthermore, the load acting to press the panel mounting portion 50 against the vehicle body panel P so as to insert the fixing portion 62 into the fixing hole P2 is transmitted to the inner lip 53 while deforming the pressing rib 54. In this way, in the grommet 20 in which the bottom surface portion 61 abuts against the tip portion of the pressing rib 54, the repulsive force against the load can be made gentler than in a case in which the pressing rib 54 is not present and the opposing portion 51 and the bottom surface portion 61 are in surface contact. This improves the ease of inserting the fixing portion 62 into the fixing hole P2.

[0077] Furthermore, the pressing rib 54 is provided on the opposing portion 51. That is, both the pressing rib 54 and the inner lip 53 are provided on the opposing portion 51. This prevents the inner lip 53 and the pressing rib 54 from shifting positions when the inner 30 is housed in the panel mounting portion 50. Therefore, in the fixed state, the inner lip 53 can be reliably pressed against the vehicle body panel P, further improving the watertightness provided by the inner lip 53.

[0078] Furthermore, the pressing rib 54 is configured to have a tapered shape that tapers toward the upward side HU, which is the protruding direction. In other words, the pressing rib 54 is configured to widen as it approaches the inner lip 53. This allows the load to be transmitted to the inner lip 53 more efficiently, and in the fixed state, the pressing rib 54 can reliably press the inner lip 53. This further improves the watertightness of the inner lip 53.

[0079] Furthermore, in a cross section that crosses the pressing rib 54 and the inner lip 53, the center of the pressing rib 54 coincides with the center of the inner lip 53. This allows the load applied to the pressing rib 54 to be transmitted to the inner lip 53 efficiently and without waste. This ensures that the water-stopping ability of the inner lip 53 is improved.

[0080] Furthermore, a plurality of inner lips 53 are provided at predetermined intervals in the wiring direction L of the harness WH, and a plurality of pressing ribs 54 are provided corresponding to the inner lips 53. This allows the load acting on the plurality of pressing ribs 54 to act on the plurality of inner lips 53, thereby ensuring that each inner lip 53 abuts against the vehicle body panel P. Therefore, it is possible to further improve the watertightness at least in the wiring direction L where the plurality of inner lips 53 are provided.

[0081] The inner lip 53, when viewed from the lower side HD of the fixing portion 62, is provided along the width direction W intersecting with the wiring direction L of the harness WH and the wiring direction L, and is rectangular so as to surround the through-hole 511. The pressing rib 54 includes a wiring-side rib 542 corresponding to the inner lip 53 along the wiring direction L, and a width-side rib 541 corresponding to the inner lip 53 along the width direction W and not in contact with the wiring-side rib 542.

[0082] This allows the inner lip 53 (the wiring-side lip 532) along the wiring direction L corresponding to the wiring-side rib 542 and the inner lip 53 (the width-side lip 531) along the width direction W corresponding to the width-side rib 541 to be reliably abutted against the vehicle body panel P. In other words, the portions of the rectangular inner lip 53 corresponding to the sides can be reliably abutted against the vehicle body panel P. This makes it possible to more reliably improve the water-stopping ability of the inner lip 53.

[0083] Furthermore, the wiring-side ribs 542 and the width-side ribs 541 are not provided at locations corresponding to the intersections with the inner lip 53 along the wiring direction L and the width direction W, i.e., at corners where the rigidity of the rectangular inner lip 53 is relatively high. Therefore, the load applied during installation is applied to the panel mounting portion 50 via the wiring-side ribs 542 and the width-side ribs 541 at locations other than the intersections, allowing the inner lip 53 to be reliably brought into contact with the vehicle body panel P.

[0084] Furthermore, since the wiring-side ribs 542 and the width-side ribs 541 are not provided at locations corresponding to the corners of the inner lip 53, which has a relatively high rigidity, the repulsive force when a load is applied can be reduced. Therefore, the grommet 20 and the grommet-equipped harness 3 can suppress a decrease in ease of inserting the fixing portion 62 into the fixing hole P2.

[0085] Furthermore, the panel mounting portion 50 is configured in a triangular shape when viewed from the routing direction L of the harness WH, and the inner 30 is also configured in a triangular shape that can be fitted into the panel mounting portion 50. This allows the load applied to the panel mounting portion 50 to be applied to the pressing rib 54 via the inner 30. Therefore, the watertightness of the inner lip 53 is improved more reliably, and the panel mounting portion 50 can be mounted to the vehicle body panel P.

[0086] In the correspondence between the configuration of the present invention and the above-described embodiments, the wire harness of the present invention corresponds to the harness WH, and similarly, The grommet body corresponds to the grommet body 21, The inner is compatible with inner 30, The panel corresponds to the body panel P, The mounting portion corresponds to the panel mounting portion 50, The thickness direction corresponds to the height direction H, The through hole corresponds to the through hole 511, The opposing portion corresponds to the opposing portion 51, The fixing hole corresponds to the fixing hole P2, The fixed portion corresponds to the fixed portion 62, The waterproof part is compatible with the inner lip 53. The rib corresponds to the pressing rib 54, The grommet is compatible with grommet 20. The insertion direction corresponds to the lower HD. The wiring direction corresponds to the wiring direction L, The cross direction corresponds to the width direction W, The first rib corresponds to the wiring side rib 542, The second rib corresponds to the width side rib 541, The grommet-equipped harness corresponds to the grommet-equipped harness 3, but the present invention is not limited to the configuration of the above-described embodiment, and many other embodiments can be obtained.

[0087] For example, in the present embodiment, the pressing rib 54 is provided on the facing portion 51, but the pressing rib 54 may be provided on the inner 30 at a position corresponding to the inner lip 53 when the inner 30 is housed in the panel mounting portion 50. Furthermore, the pressing rib 54 may be provided on the facing portion 51 and the inner 30 at a position corresponding to the inner lip 53.

[0088] Furthermore, in this embodiment, the pressing rib 54 is disposed so that its center coincides with the center in an orthogonal cross section perpendicular to the longitudinal direction of the inner lip 53. However, it is sufficient that the pressing rib 54 corresponds to the inner lip 53, and for example, the pressing rib 54 may be disposed so that a portion of the pressing rib 54 faces the inner lip 53. This allows the load acting on the pressing rib 54 to be transmitted to the inner lip 53.

[0089] Furthermore, although the pressing rib 54 is formed in an arc-shaped cross section tapering toward the tip, the shape is not limited to this and may be formed, for example, so as to protrude perpendicular to the facing surface 51b or so as to have a generally trapezoidal shape tapering toward the tip. The pressing rib 54 may also be configured to be wider or narrower than the inner lip 53.

[0090] 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 are formed to suppress the movement of the water D toward the rear end side LB. [Explanation of symbols]

[0091] 3...Harness with grommet 20...Grommet 21...Grommet body 30...Innerwear 50...Panel mounting section 51...opposing part 53...Inner lip 54...Pressing rib 62…Fixed part 511...Through hole 541...Width side rib 542...Rib on cable side H: Height L…Routing direction P...Body panel W: Width direction P2…Fixing hole HD…Lower side WH...Harness

Claims

1. A cylindrical grommet body for routing a wire harness inside; an inner that is housed in the grommet body and fixes the grommet body to a panel; An attachment portion is provided at one end of the grommet body to accommodate the inner member and to be attached to the panel, The mounting portion has a through hole penetrating in a plate thickness direction and a flat plate-shaped facing portion facing the panel, The inner panel is provided with a fixing portion that is inserted into the through hole and fixed to a fixing hole provided in the panel, The facing portion is provided with a water stop portion that protrudes toward the panel and abuts against the panel to stop water when the fixing portion is fixed to the fixing hole, At least one of the opposing portion and the inner portion is provided with a rib that protrudes toward the other. The rib is disposed at a position corresponding to the water stopping portion. Grommet.

2. The rib is provided on the opposing portion. The grommet of claim 1 .

3. The rib has a tapered shape that tapers toward the protruding direction. The grommet of claim 2.

4. In a cross section that crosses the rib and the water stopping portion, the center of the rib coincides with the center of the water stopping portion. The grommet according to claim 3.

5. The watertight portion is provided in plurality at predetermined intervals in the wiring direction of the wire harness, The ribs are provided in a plurality corresponding to the water stopping portions. The grommet of claim 1 .

6. When viewed from the insertion direction of the fixing part, the waterproofing portion is provided in a rectangular shape so as to extend along the wiring direction and a cross direction intersecting the wiring direction of the wire harness and to surround the through hole, The rib is a first rib corresponding to the water stopping portion along the wiring direction; a second rib corresponding to the water stopping portion along the cross direction and not in contact with the first rib; The grommet of claim 1 .

7. The mounting portion is configured in a triangular shape when viewed from the wiring direction of the wire harness, The inner is configured in a triangular shape that can be fitted to the mounting portion. The grommet of claim 1 .

8. The grommet according to claim 1; and a wire harness inserted into the grommet body. Harness with grommets.

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