JP3983212B2 - Equipment with grommets through which wire harnesses are inserted - Google Patents

Description

  The present invention relates to a device that includes a waterproof grommet through which a wire harness is inserted, and that prevents the water from entering through a through hole of a partition member to which the grommet is attached. For example, the wire harness is an automobile wire harness routed across the engine compartment and the vehicle compartment, and the device is an automobile.

  Conventionally, when an automotive wire harness is routed through a panel that partitions an engine compartment and a vehicle compartment, a grommet is attached to a portion of the panel through which the wire harness is inserted, and the wire harness is inserted into the grommet. . A means is provided between the grommet and the panel and between the grommet and the wire harness for preventing water from entering the vehicle compartment from the engine compartment through the through hole.

For example, in the waterproof structure of a wire harness disclosed in Patent Document 1, a waterproofing tool that is connected and attached to a grommet is provided. The waterproofing device has a lateral tube portion having a tip connected to a tip portion on the engine room side of the grommet, and a downward tube portion arranged toward the lower side of the automobile. Moreover, the grommet disclosed in Patent Document 2 includes a locking collar and a water-stopping agent-filled cylinder, and the grommet and the wire harness are formed by the water-stopping agent that is cured after being filled in the water-stopping agent-filling cylinder. Is sealed. Further, a burring projecting from the periphery to the engine room side is provided in the through hole in which the grommet is mounted, and a seal rib projecting from the bottom surface of the locking groove of the grommet is pressed against the inner peripheral surface of the burring. .
Japanese Patent Laid-Open No. 10-224941 Japanese Patent Laid-Open No. 10-285753

  In the prior art, in order to prevent intrusion of water from between the grommet and the wire harness, a waterproofing device or a water-stopping agent is required, and when a water-stopping agent is used, a water-stopping material is used. Since filling work is added and it takes time for the water-stopper to harden, the cost of the grommet waterproof structure increases. In addition, if the grommet and the burring are only in pressure contact with each other on the inner peripheral surface in the radial direction of the through hole, the grommet is elastically deformed in the radial direction when the wire harness is shaken in the radial direction due to vibration transmitted to the wire harness. , Sealability may be reduced. Furthermore, if the through hole is formed along a vertical plane, the work of inserting the wire harness into the through hole and further inserting the grommet into the through hole is a work from the horizontal direction. It is difficult and the grommet mounting workability is not good.

The present invention has been made in view of such circumstances, an invention according to claim 1-5, wherein, to improve the sealing property between the instrumentation wearing part and the grommet, and the mounting operation of the grommet and purpose to facilitate, the invention of claim 5, wherein serves to suppress an increase in cost, and an object thereof is to increase the degree of freedom of design of the mounting portion.

According to a first aspect of the present invention, a partition member that partitions the first space and the second space, a waterproof grommet that is inserted through a through hole of a mounting portion provided in the partition member, and the grommet is inserted into the grommet. A wire harness routed over the first space and the second space, and the grommet prevents water from entering the second space from the first space through the through hole. The mounting portion has a protruding portion that protrudes toward the first space, and the protruding portion has a holding wall that holds the grommet as an upper wall, and the holding wall has the through hole. And a peripheral portion formed radially around the peripheral portion, and the peripheral portion inclines downward as it moves away from the partition member toward the first space. On an inclined surface The through-hole is formed in the holding wall so that its axis extends obliquely upward in a direction extending toward the first space, and the grommet is disposed in the through-hole, A flange connected to the tube portion and having an outer diameter larger than the diameter of the through-hole and positioned on the first space side with respect to the through-hole, and the flange and the holding wall are liquid-tight The mounting portion is formed with a recessed portion that opens to the first space above the projecting portion, and the uppermost portion of the flange is accommodated in the recessed portion and is viewed from above in the vertical direction. The device is located in a shielded area hidden by the wall surface of the recess .

According to this, since the through hole faces upward, the wire harness and the grommet can be inserted into the through hole from above. In addition, since the upper surface of the upper wall is an inclined surface inclined downward, water drainage on the upper surface is good, so that water can be prevented or suppressed from entering between the mounting portion and the grommet through the upper surface. Is done.
Furthermore, since the top of the mounting part and the flange are covered with the wall surface of the recess, the top part is not directly exposed to water falling vertically from above, so the boundary where the mounting part and the grommet begin to come into liquid-tight contact Intrusion of water from the upper part of the part is prevented or suppressed, and entry of water from between the mounting part and the grommet is prevented or further suppressed.

According to a second aspect of the present invention, in the device according to the first aspect, the peripheral edge protrudes in a direction toward the first space in an axial direction with respect to the peripheral part, and an outer peripheral edge of the flange is the penetrating hole. It extends radially outward with respect to the hole and comes into liquid-tight contact with the surrounding portion .

According to this, the flange is, since the contact with the liquid-tight ambient portion, reduction in the sealing performance between the mounting portion and the grommet is prevented or suppressed.

According to a third aspect of the present invention, the peripheral portion includes an inner peripheral portion having an inner peripheral surface made of a cylindrical surface that constitutes a peripheral wall surface of the through hole, and an outer peripheral surface that is continuous with the peripheral portion and made of a conical surface. And an outer peripheral portion having a top portion having an annular top surface between the inner peripheral portion and the outer peripheral portion in the radial direction, and the flange faces the top surface of the peripheral edge portion in the axial direction. An inner wall surface that is liquid-tightly contacted, an outer wall surface that faces the upper surface of the peripheral portion in the axial direction and is liquid-tightly contacted, and an outer peripheral surface of the peripheral edge portion that is radially opposed to the liquid-tight surface. The cylindrical portion has an inner peripheral wall surface that is in a liquid-tight contact with the inner peripheral surface of the inner peripheral portion in a radial direction .

According to this, the grommet is in fluid-tight contact with the mounting portion at two seal surfaces of the inner wall surface and the outer wall surface in the axial direction, and at two seal surfaces of the inner wall surface and the outer wall surface in the radial direction. Liquid-tight contact with the mounting part.

According to a fourth aspect of the present invention, in the device according to the third aspect, a lip comprising an annular ridge is formed on at least one of the inner wall surface, the outer wall surface, the outer peripheral wall surface, and the inner peripheral wall surface. Is.

According to this, the seal pressure is increased by being crushed by the inner peripheral surface, the top surface, the outer peripheral surface, and the upper surface of the mounting portion facing the lip.

The invention according to claim 5, wherein, in the device according to any one of claims 1 to 4, wherein the mounting portion, the the partition member is intended to be coupled to the partitioning member with a separate member .

According to this, since it is not necessary to form a protrusion part and a recessed part in a partition member, it is avoided that shaping | molding of a partition member becomes complicated. Also, changing the tilt angle of the upper surface consisting of a direction and the inclined surface of the axial line of the through hole, without changing the entire partition member, it is possible by changing the only mounting portion, further shared by different types of mounting portion be able to.

According to the first aspect of the present invention, since the wire harness and the grommet can be inserted into the through hole from above, it is easy to attach the grommet to the mounting portion. Moreover, since the water drainage on the upper surface is good, the intrusion of water from between the mounting portion and the grommet is prevented or suppressed, so that the sealing performance between the mounting portion and the grommet is improved.
In addition, water falling vertically from above does not directly hit the top of the flange, preventing or suppressing water from entering from the upper part of the boundary where the mounting part and the grommet begin to come into liquid-tight contact, Since the intrusion of water from between the mounting portion and the main body is prevented or further suppressed, the sealing performance between the mounting portion and the grommet is improved.

According to claim 2, wherein the matter by flanges grayed grommet, since lowering of the sealing property between the mounting portion and the grommet is prevented or suppressed, sealing performance between the mounting portion and the grommet is further enhanced .

According to the matter of Claim 3, the following effect is produced. That is, the grommet is in liquid-tight contact with the mounting portion at two sealing surfaces on the inner wall surface and the outer wall surface in the axial direction, and is attached to the mounting portion at two sealing surfaces on the inner and outer wall surfaces in the radial direction. Since the liquid-tight contact is made, a high sealing property between the mounting portion and the grommet is obtained.

According to claim 4, wherein the matter, since the sealing pressure is increased by the lip, thereby improving the sealing property between the mounting portion and the grommet.

According to claim 5, wherein the matter, since the molding of the specifications Setsu member is prevented from being complicated, an increase in cost can be suppressed. Also, changes in slope forms such as the tilt angle of the direction and the upper surface of the axis of the through-holes are the possible changes only mounting portion, after which the degree of freedom of design of the mounting portion is increased, the common holder in different models Can contribute to cost reduction.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3.
1 and 2, a wire harness 1 to which the present invention is applied is an automobile wire harness, and a waterproof grommet 2 through which the wire harness 1 is inserted is provided in an automobile as a device.

  In the automobile, an engine room 4 as a first space and a vehicle room 5 as a second space, which are partitioned by a dashboard 3 that is a partition member, are formed, and an internal combustion as an engine is formed in the engine room 4. An institution is deployed. The dashboard 3 is provided with a holder 6 as a mounting portion to which the grommet 2 is attached, and the wire harness 1 is inserted through the grommet 2 and routed over the engine compartment 4 and the vehicle compartment 5.

  The wire harness 1 includes a first harness portion 1a that is a portion that is routed in the engine compartment 4 and a second harness portion 1b that is a portion that is routed in the vehicle compartment 5. The first harness portion 1a is connected to a plurality of electrical components such as a battery disposed in the engine compartment 4, an electronic control unit that controls the internal combustion engine, a transmission, and the like, and an ignition coil. On the other hand, the 2nd harness part 1b is connected to several electric components, such as indicators, such as a vehicle speed meter. The wire harness 1 and the grommet 2 can be exposed to water in the engine compartment 4.

  The holder 6 is composed of a member different from the dashboard 3 made of a plate material. A holder 6 formed by bending a metal plate material is detachably coupled to the dashboard 3 by bolts 7 serving as coupling means. The holder 6 includes a projecting portion 10 projecting in a mountain shape on the engine chamber 4 side, and a recess 11 positioned above the projecting portion 10 and having an opening that opens to the engine chamber 4 by projecting to the vehicle compartment 5 side. Have

  The protrusion 10 has a holding wall 12 that holds the grommet 2. The holding wall 12 has an annular shape that defines the through hole 13 and the through hole 13 through which the wire harness 1 and the grommet 2 are inserted. And a peripheral portion 15 formed around the peripheral portion 14 radially outward. The peripheral edge portion 14 has an annular shape protruding in the direction A2 toward the engine chamber 4 side in the axial direction A1 (that is, a reference direction A2 to be described later) with respect to the base surface 15a that is the wall surface of the peripheral portion 15 on the engine chamber 4 side. Consists of protrusions. Specifically, the peripheral edge portion 14 is continuous with the inner peripheral portion 16 having an inner peripheral surface 16a formed of a cylindrical surface constituting the peripheral wall surface of the through-hole 13, and the peripheral portion 15, and the reference direction with respect to the peripheral portion 15 It has the outer peripheral part 17 which protrudes in A2, and the top part 18 which continues in both to the circumference between the inner peripheral part 16 and the outer peripheral part 17 in radial direction. The outer peripheral portion 17 has an outer peripheral surface 17a that is continuous with a flat annular base surface 15a and protrudes so as to have a smaller diameter in the reference direction A2, and the top portion 18 has a base surface 15a. In addition, it has an annular top surface 18a composed of a plane continuous to the inner peripheral surface 16a and the outer peripheral surface 17a at a position protruding in the reference direction A2. The holding wall 12 is also the upper wall of the protruding portion 10, and the base surface 15 a is also the upper surface of the holding wall 12.

  Here, the reference direction A2 is a direction in which the axis L1 is directed from the through hole 13 toward the engine compartment 4. In this specification and claims, the axial direction A1 means the direction in which the axis L1 of the through hole 13 extends, and the radial direction means the radial direction with respect to the axis L1 or the through hole 13, The direction means a circumferential direction with respect to the axis L1 or the through hole 13.

  The through-hole 13 is a circular hole whose axis L1 is directed obliquely upward from the through-hole 13 toward the engine compartment 4, and is viewed from a direction perpendicular to a reference plane that is a vertical plane including the axis L1. In order to ensure that the inclination angle θ, which is an inferior angle between the intersecting line L2 with the vertical plane perpendicular to the plane and the axis L1, is an acute angle, preferably after ensuring the required drainage of water on the base surface 15a, It is formed to be 45 ° or less. Further, the base surface 15a and the top surface 18a are planes parallel or substantially parallel to the plane P1 perpendicular to the axis L1. Therefore, the holding wall 12 is generally inclined downward as it moves away from the dashboard 3 other than the holder 6 toward the engine compartment 4, and the base surface 15 a and the top surface 18 a are formed from the dashboard 3 to the engine compartment. It is an inclined surface which inclines below as it leaves | separates to 4 side.

On the other hand, the grommet 2 includes an insertion hole 20 through which the wire harness 1 is inserted, and a cylindrical main body 21 provided with an annular groove 27 that engages with the peripheral portion 14 when the peripheral portion 14 is fitted. A cylindrical engine chamber side tube portion 22 that covers a portion of the first harness portion 1a near the main body 21 in the engine chamber 4 and a vehicle compartment 5 located on the opposite side of the tube portion 22 across the main body 21. And a tubular casing-side tube portion 23 that covers a portion of the second harness portion 1b near the main body 21. In the grommet 2 made of rubber or elastomer, both tube portions 22 and 23 having a smaller diameter than the main body 21 are formed integrally with the main body 21.
The insertion hole 20 has a large-diameter portion 20a formed by the main body 21 and small-diameter portions 20b and 20c formed by both the tube portions 22 and 23, respectively.

  Referring to FIGS. 2 and 3, the main body 21 has a first flange located on the engine chamber 4 side with respect to the through hole 13 in a state where the grommet 2 is mounted on the holder 6 (hereinafter referred to as a mounted state). 24, a second flange 25 located on the vehicle compartment 5 side, and a cylindrical portion 26 located in the through hole 13 and connecting the flanges 24, 25. An annular groove 27 is formed by the flanges 24 and 25 and the cylindrical portion 26. Further, both the flanges 24 and 25 have an outer diameter larger than the diameter of the through hole 13, and the outer diameter of the first flange 24 is larger than the outer diameter of the second flange 25.

The first flange 24 having a circular outer periphery is formed in the outer peripheral edge portion 24h of the inner wall surface 24a facing and contacting the top surface 18a in the axial direction A1 and contacting the base surface 15a in the axial direction A1. And an outer peripheral wall surface 24c that is between the inner wall surface 24a and the outer wall surface 24b in the radial direction, is continuous to both wall surfaces 24a and 24b, and is opposed to and in contact with the outer peripheral surface 17a in the radial direction. The second flange 25 having a circular outer periphery has a wall surface 25a that contacts the end surface 16b facing the axial direction A1 of the inner peripheral portion 16 in the axial direction A1, and the cylindrical tubular portion 26 has an inner peripheral surface. It has an inner peripheral wall surface 26a that comes into contact with 16a in the radial direction. Further, the inner wall surface 24a, the outer wall surface 24b, the outer peripheral wall surface 24c and the inner peripheral wall surface 26a, the lip 24a1,24b1,24c1,26a1 consisting collision Article annular to enhance sealing pressure is formed. The inner wall surface 24a is a wall surface that faces in the axial direction A1 between the inner circumferential wall surface 26a and the outer circumferential wall surface 24c in the radial direction, and the outer wall surface 24b is an axial line that is located radially outward from the outer circumferential wall surface 24c. It is a wall surface facing the direction A1.

  Here, the inner wall surface 24a, the outer circumferential wall surface 24c, the inner circumferential wall surface 26a, and the wall surface 25a constitute the wall surface of the annular groove 27. The peripheral edge portion 14 and the peripheral portion 15 of the holder 6 and the first and second flanges 24 and 25 and the cylindrical portion 26 of the grommet 2 are respectively opposed to each other in the mounted state, the inner wall surface 24a and the top surface 18a facing each other. Each of the wall surfaces 24a, 24b, 24c is configured such that the outer wall surface 24b and the base surface 15a, the outer wall surface 24c and the outer surface 17a, the inner wall surface 26a and the inner surface 16a, and the wall surface 25a and the end surface 16b constitute a sealing surface. , 26a and 25a are set to shapes (including dimensions) that cause elastic deformation. Further, the outer diameter of the first flange 24 is such that when the grommet 2 is mounted on the holder 6, the grommet 2 attached to the wire harness 1 passes through the through hole 13 together with the wire harness 1 from the engine compartment 4 side to the vehicle compartment 5. When the second flange 25 is brought into contact with the inner peripheral portion 16 and the grommet 2 is elastically deformed, the second flange 25 is reduced in diameter, and the inner peripheral portion 16 reduces the second flange 25. The size is set so as to be able to get over and fit into the annular groove 27.

Then, in a state in which the peripheral edge portion 14 is fitted into the annular groove 27 and the peripheral edge portion 14 and the annular groove 27 are engaged, that is, in the mounted state, the wall surface 25a is on the end surface 16b and the inner peripheral wall surface 26a is on the inner periphery. The inner wall surface 24a is in contact with the surface 16a, the outer peripheral wall surface 24c is in contact with the outer peripheral surface 17a, and the outer wall surface 24b is in liquid-tight contact with the base surface 15a. Therefore, the first flange 24 extends radially outward with respect to the through hole 13 and comes into liquid-tight contact with the peripheral portion 15.
At this time, each lip 26a1, 24a1, 24c1, 24b1 (the main part of the grommet 2 in the natural state before being inserted through the through hole 13 is indicated by a two-dot chain line) By being crushed by the surfaces 16a, 18a, 17a, 15a, the sealing pressure is increased and the sealing performance between the holder 6 and the grommet 2 is improved. Since the outer peripheral edge portion 24h having the outer wall surface 24b of the first flange 24 protrudes in the direction opposite to the reference direction A2, the first flange 24 passes through the outer peripheral surface 17a from the top surface 18a. An umbrella-shaped flange covering at least a part of 15a.

  1 and 2, the wire group 1c of the wire harness 1 is inserted in the insertion hole 20 of the grommet 2 without being bound by a covering member such as an exterior or tape winding. And the tube part 22 which coat | covers the part near the main body 21 of the 1st harness part 1a is bent below after extending in the reference direction A2 along the axis line L1 from the base 22a which is a connection part with the main body 21. The lower portion 22c is formed by The downward portion 22c includes a tip portion 22b, and an opening (not shown) of the tip portion 22b opens downward. The tube portion 22 is supported by a vehicle body side member, here, the side panel 8 through a support member including clips 41 and 42 and stays 43 and 44 at an appropriate number of locations between the base portion 22a and the distal end portion 22b. .

The tube portion 22 has a bellows portion that can be expanded and contracted in the longitudinal direction, and a first end portion 22b of the tube portion 22 is covered with a covering member such as an exterior component or a tape, here, a protective tube 45 that is an exterior component. The harness part 1a is integrally coupled by a tubular joint 46. This joint 46 has two semi-cylinders that can be opened and closed by being joined by a hinge part (not shown), and a tip part 22b and an adjacent part 1a1 of the first harness part 1a adjacent to the tip part 22b are: After being accommodated, it is closed by a coupling means such as a screw. The joint 46 joins the tube portion 22 and the adjacent portion 1a1, preferably in a liquid-tight manner, and the joint 46 is supported by the side panel 8 via a stay 47.
The tube portion 23 extending in the passenger compartment 5 is integrally coupled to the second harness portion 1b in a state where the electric wire group 1c is bound by winding a tape 48 as a binding member around the tip portion 22b.

  With the grommet 2 mounted on the holder 6, the upper part of the peripheral part 15 near the uppermost part 15 e and the uppermost part 15 e, the upper part of the outer peripheral part 17 near the uppermost part 17 e and the uppermost part 17 e, and the uppermost part 24 e of the first flange 24 The upper part near the uppermost part 24e is housed in the recessed part 11 of the holder 6 and becomes a shielded part located in the shielded area hidden by the wall surface 11a of the recessed part 11 when viewed downward in the vertical direction. . The shielded portion includes a basal surface 15a and an outer wall surface 24b (FIG. 3) which are the outermost peripheral sealing surfaces located radially outermost among the sealing surfaces in which the holder 6 and the grommet 2 are in liquid-tight contact. The uppermost portions 15a1, 24b1 (see FIG. 3) and the upper portions near the uppermost portions 15a1, 24b1 are also included. For this reason, the shielded part includes the uppermost part 50a of the boundary part 50 where the holder 6 and the grommet 2 start to come into liquid-tight contact and the upper part near the uppermost part 50a. For this reason, it is prevented that the water droplet which falls in parallel with the perpendicular direction from above hits this shielded part directly. Further, in the uppermost portion 17a1 of the reference plane and the outer peripheral surface 17a, an intersection line L3 between the reference plane and the outer peripheral surface 17a is inclined upward in the reference direction A2.

Next, operations and effects of the embodiment configured as described above will be described.
In a state where the tube portion 22 of the grommet 2 is folded and contracted at the bellows portion, the insertion hole 20 is expanded by a jig, and one end portion of the wire harness 1, here the second end, is expanded to the expanded insertion hole 20. The wire harness 1 is inserted from the end on the harness part 1b side. Thereafter, the tube portion 22 and the first harness portion 1a are coupled by the joint 46, and the tube portion 23 and the second harness portion 1b are bound and coupled by the tape 48, whereby the grommet 2 and the wire harness 1 are connected. Combined together.

The outline of the mounting operation of the grommet 2 to the holder 6 is as follows. First, the wire harness 1 to which the grommet 2 is attached is inserted into the through hole 13 of the holder 6 fixed to the dashboard 3 from the engine compartment 4 side, with the second harness portion 1b first. Next, the grommet 2 is in a temporarily placed state in which the tube portion 23 passes through the through hole 13 and is located on the vehicle compartment 5 side, and the second flange 25 is placed on the peripheral edge portion 14 and located on the engine compartment 4 side. It is said. Thereafter, by pulling the grommet 2 together with the wire harness 1 into the vehicle compartment 5 from the vehicle compartment 5 side, the second flange 25 abuts against the inner peripheral portion 16 of the peripheral edge portion 14 and is elastically deformed so as to reduce the diameter. The peripheral portion 16 gets over the second flange 25, and the peripheral portion 14 is fitted in the annular groove 27. Then, the grommet 2 is mounted on the holder 6 and eventually the dashboard 3 by the engagement between the peripheral edge portion 14 and the annular groove 27 in this fitted state.
Thereafter, in the engine compartment 4, the second harness portion 1 b is held on the vehicle body via holding means such as the clips 41 and 42 and the stays 43 and 44.

  The grommet 2 is attached to the holder 6, and the wire harness 1 is inserted through the through hole 13 in a state where the wire harness 1 is routed through the insertion hole 20 of the grommet 2 and over the engine compartment 4 and the vehicle compartment 5. The tube portion 22 formed integrally with the main body 21 covers a portion near the main body 21 of the first harness portion 1a, and the distal end portion 22b of the tube portion 22 extends downward in the engine chamber 4 so that the main body By being covered with the tube portion 22 integrally formed with the water 21, intrusion of water from between the main body 21 and the tube portion 22 is prevented, and the distal end portion 22b of the tube portion 22 extends downward, so that the distal end Intrusion of water from the portion 22b into the tube portion 22 is prevented or suppressed. As a result, since an additional member and a water stop agent are unnecessary, the automobile which has the waterproof structure of the grommet 2 which can reduce cost is obtained.

  Further, the distal end portion 22b is integrally coupled to the portion of the first harness portion 1a covered with the protective tube 45 in a liquid-tight state by a joint 46, so that water is introduced into the tube portion 22 from the distal end portion 22b. Is reliably prevented from entering.

  The main body 21 of the grommet 2 is provided with an annular groove 27 that engages with the peripheral edge 14 that protrudes in the reference direction A2 with respect to the base surface 15a of the peripheral part 15, and the engagement state between the peripheral edge 14 and the annular groove 27 is provided. The inner peripheral wall surface 26a is liquid-tight on the inner peripheral surface 16a, the outer peripheral wall surface 24c is on the outer peripheral surface 17a, and the inner wall surface 24a is on the top surface 18a between the inner peripheral wall surface 26a and the outer peripheral wall surface 24c in the radial direction. The main body 21 comes into liquid-tight contact with the peripheral portion 14 at the inner peripheral wall surface 26a and the outer peripheral wall surface 24c that are radially separated from each other with the inner wall surface 24a interposed therebetween. Even if the harness 1 is swung and the main body 21 is deformed in the radial direction by the swung wire harness 1, at least one of the inner peripheral wall surface 26a and the outer peripheral wall surface 24c is deformed in a direction in which the seal pressure increases. Decrease in sealing performance between the peripheral edge 14 and the main body 21 is prevented or suppressed. Is, the sealing property between the holder 6 and the grommet 2 is improved.

  Furthermore, since the outer wall surface 24b of the grommet 2 positioned radially outward from the outer peripheral wall surface 24c is in liquid-tight contact with the base surface 15a of the peripheral portion 15, the sealing property between the holder 6 and the grommet 2 is improved. A drop is prevented or suppressed, and the sealing performance between the holder 6 and the grommet 2 is further improved.

  Then, the wall surface 25a of the grommet 2 comes into liquid-tight contact with the end surface 16b, so that the grommet 2 is finally attached to the holder 6 by three sealing surfaces of the wall surface 25a, the inner wall surface 24a, and the outer wall surface 24b in the axial direction A1. Since the liquid-tight contact is made and the holder 6 is liquid-tightly contacted by the two sealing surfaces of the inner peripheral wall surface 26a and the outer peripheral wall surface 24c in the radial direction, high sealing performance between the holder 6 and the grommet 2 is obtained.

  A through-hole 13 is formed in the holding wall 12 of the protruding portion 10 so that the through-hole 13 faces upward in the direction in which the axis L1 extends into the engine chamber 4, and the holding wall 12 further includes a peripheral portion 14 and a peripheral portion. 15 and the base bottom surface 15a is an inclined surface that inclines downward as it moves away from the dashboard 3 toward the engine compartment 4, so that the through hole 13 faces upward. Since the wire harness 1 and the grommet 2 can be inserted, the attaching operation of the grommet 2 to the holder 6 is facilitated. In addition, since the bottom surface 15a is an inclined surface inclined downward, water drainage on the bottom surface 15a is good, so that the holder 6 and the main body 21 are interposed between the outer peripheral surface 17a continuous to the bottom surface 15a. Since water can be prevented or suppressed from entering, the sealing performance between the holder 6 and the grommet 2 is improved.

The holder 6 is formed with a recess 11 that opens to the engine chamber 4 above the projecting portion 10, and is the outermost outermost circumferentially located seal surface in which the holder 6 and the grommet 2 are in fluid-tight contact. The upper surfaces of the base surface 15a and the outer wall surface 24b, which are the sealing surfaces, near the uppermost portions 15a1, 24b1 and the uppermost portions 15a1, 24b1, and the upper portions of the first flange 24 near the uppermost portions 24e and 24e are vertically viewed from above. By being the shielded portion hidden by the wall surface 11a of the concave portion 11 when viewed, the base surface 15a to be the shielded portion and the uppermost portions 15a1, 24b1 of the outer wall surface 24b and the upper portions near the uppermost portions 15a1, 24b1 , Furthermore, water that falls vertically from above does not directly hit the upper part near the uppermost part 24e and the uppermost part 24e, and water enters from the upper part of the boundary part 50 where the holder 6 and the grommet 2 begin to come into liquid-tight contact. To prevent or It is braking, because water is able to penetrate is prevented or suppressed further from between the holder 6 and the main body 21, the sealing property between the holder 6 and the grommet 2 is improved.

  The holder 6 is a separate member from the dashboard 3 and is composed of the holder 6 coupled to the dashboard 3, so that it is not necessary to form the protrusion 10 and the recess 11 in the dashboard 3. Since it is avoided that the shaping | molding of 3 is complicated, the increase in cost is suppressed. In addition, since it is possible to change the inclination form such as the direction of the axis L1 of the through-hole 13 and the inclination angle of the base surface 15a by changing only the holder 6 without changing the entire dashboard 3, the design of the holder 6 is possible. In addition, the holder 6 can be shared by different models, thereby contributing to cost reduction.

Hereinafter, an embodiment in which a part of the configuration of the above-described embodiment is changed will be described with respect to the changed configuration.
The partition member is the dashboard 3 that partitions the engine compartment 4 and the vehicle compartment 5, but may be a member that partitions the first space where water droplets are present and the second space where water intrusion from the first space is undesirable. That's fine. In addition, the device may be other than an automobile, and thus the wire harness may be used other than the automobile.

  The holder 6 may be formed of a synthetic resin. Further, the mounting portion may be constituted by a portion integrally formed with the dashboard 3 without being constituted by the holder 6 which is a member different from the dashboard 3. The outer peripheral surface 17a of the peripheral edge portion 14 may be a cylindrical surface.

  The engine may be a combustion engine other than the internal combustion engine, and may be a prime mover other than the combustion engine, for example, an electric motor. Although the internal combustion engine is used in the vehicle in the embodiment, it may be used in a ship propulsion device such as an outboard motor having a crankshaft oriented in the vertical direction.

It is a principal part perspective view from an engine compartment side centering on the grommet in which the wire harness of the motor vehicle which is embodiment of this invention was penetrated. It is sectional drawing in the reference plane of the holder and grommet of FIG. It is a principal part enlarged view of the holder and grommet of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Wire harness, 1a ... 1st harness part, 2 ... Grommet, 3 ... Dashboard, 4 ... Engine compartment, 5 ... Car compartment, 6 ... Holder, 7 ... Bolt, 8 ... Side panel, 9 ..., 10 ... Projection 11, recessed portion, 11 a, wall surface, 12, holding wall, 13, through-hole, 14, peripheral portion, 15, peripheral portion, 15 a, base surface, 16, inner peripheral portion, 16 a, inner peripheral surface, 17, outer periphery Part, 17a ... outer peripheral surface, 18 ... top part, 18a ... top face, 20 ... insertion hole, 21 ... main body, 22, 23 ... tube part, 22b ... tip part, 24, 25 ... flange, 24a ... inner wall surface, 24b ... Outer wall surface, 24c ... outer peripheral wall surface, 26 ... cylindrical portion, 27 ... annular groove,
41, 42 ... clip, 43, 44 ... stay, 45 ... protective tube, 46 ... joint, 47 ... stay, 48 ... tape, 50 ... border, 50a ... top,
A1 ... Axial direction, A2 ... Reference direction, L1 ... Axis line, L2, L3 ... Intersection line, θ ... Inclination angle, P1 ... Orthogonal plane.

Claims (5)

A partition member that partitions the first space and the second space;
A waterproof grommet that is inserted through a through hole of a mounting portion provided in the partition member and mounted;
A wire harness that is inserted through the grommet and routed across the first space and the second space, and
In the device in which the intrusion of water from the first space to the second space through the through hole is prevented by the grommet,
The mounting portion has a protruding portion protruding toward the first space side,
The protrusion has a holding wall that holds the grommet as an upper wall thereof,
The holding wall is formed with an annular peripheral edge that defines the through-hole and a peripheral part that is formed radially around the peripheral edge,
The peripheral portion has an upper surface formed of an inclined surface that is inclined downward as it is separated from the partition member toward the first space.
The through hole is formed in the holding wall so that its axis is inclined upward in a direction extending to the first space side,
The grommet has a cylindrical portion located in the through hole, and a flange connected to the cylindrical portion and having an outer diameter larger than the diameter of the through hole and located on the first space side with respect to the through hole. And
The flange and the holding wall are in liquid-tight contact,
The mounting portion is formed with a recess that opens to the first space above the protruding portion,
The uppermost part of the flange is housed in the recess and is located in a shielded region hidden by the wall surface of the recess when viewed from above in the vertical direction . The peripheral portion protrudes in a direction toward the first space in an axial direction with respect to the peripheral portion,
The apparatus according to claim 1 , wherein the outer peripheral edge of the flange extends radially outward with respect to the through-hole and comes into liquid-tight contact with the peripheral part . The peripheral portion includes an inner peripheral portion having an inner peripheral surface made of a cylindrical surface that constitutes a peripheral wall surface of the through hole, an outer peripheral portion having an outer peripheral surface that is continuous with the peripheral portion and has a conical surface, and a radial direction. A top portion having an annular top surface between the inner peripheral portion and the outer peripheral portion;
The flange includes an inner wall surface facing the top surface of the peripheral edge in the axial direction and in liquid-tight contact; and an outer wall surface facing the upper surface of the peripheral portion in the axial direction and in liquid-tight contact; And an outer peripheral wall surface that is in liquid-tight contact with the outer peripheral surface of the peripheral edge in a radial direction,
The tubular portion, equipment of claim 2, wherein you characterized by having an inner peripheral wall surface in contact with the radial direction in a liquid-tight into the inner peripheral surface of the inner peripheral portion. The apparatus according to claim 3 , wherein a lip comprising an annular protrusion is formed on at least one of the inner wall surface, the outer wall surface, the outer peripheral wall surface, and the inner peripheral wall surface . The mounting portion, the instrument of any one of claims 1 to claim 4, wherein said that the partition member is coupled to the partition member with a separate member.

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