JP2017228468A - Water intrusion countermeasure structure of wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water intrusion countermeasure structure of a wire harness capable of enabling to apply a waterproof measure only by combining general hard resin members with each other.SOLUTION: A water intrusion countermeasure structure of a wire harness includes: an electric wire group 13 arranged on a plurality of stages arranged in the diameter direction of the plurality of the electric wires 11 and distanced in an intersecting direction to an arrangement direction of the electric wires 11, and a blocking part 15 made of a hard resin material that surrounds a part of an extending direction of the electric wire group 13 and has an outer peripheral shape part corresponding to an inner peripheral shape of an electric wire insertion part. The blocking part 15 includes an upper stage blocking member 21 and a lower stage blocking member 23 that respectively surrounds a part in the extending direction of the electric wire group 13 in the respective stage, an engaging mechanism for integrating the blocking members each other, and a plurality of cutoff lip pieces 19 that extend in the arrangement direction of the electric wire 11 and suppress water intrusion between the blocking members by protruding on a mating surface of the blocking members at a predetermined distance along the extending direction of the electric wire group 13.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a water harness countermeasure structure for a wire harness.

  As a water stopping structure of a wire harness in which a plurality of electric wires are bundled, there are one using one liquid water stopping (silicon) or butyl rubber. As shown in FIG. 8 (a), the water stop structure with one liquid water stop is obtained by spreading the wire bundle into individual wires 501, applying silicon 503, blending, shaping, and solidifying. The outer periphery of the solidified silicon 503 is covered with a sheet material 505. Thus, the grommet 507 is extrapolated to the outer periphery of the sheet material 505 as for the wire harness provided with the water stop structure. The grommet 507 waterproofs between the sheet material 505 and a harness insertion hole (not shown) such as a vehicle body panel.

  Further, as shown in FIG. 8 (b), the water-stopping structure using butyl rubber is obtained by separating the electric wire bundle into individual electric wires 501 and placing them on the butyl rubber 509, and repeatedly laying the butyl rubber 509 and the electric wires 501 under pressure. Butyl rubber 509 is filled between the wires and molded. The outer periphery of the butyl rubber 509 is wound with an adhesive tape 511. Thus, the seal sponge 513 is wound around the outer periphery of the adhesive tape 511 in the wire harness to which the water stop structure is provided. The seal sponge 513 waterproofs between the adhesive tape 511 and the harness insertion hole (not shown).

JP 2011-172412 A

  However, in the above-described water stop structure using one liquid water stop, a water stop agent (silicon 503) is filled between the wires and adheres to the wire covering. For this reason, although the water stop performance is very excellent, the management of the water stop agent is difficult and it takes about several hours to solidify, so the workability is not good. Further, the water-stopping structure using the above-described butyl rubber 509 is filled with a water-stopping agent (butyl rubber 509) between the wires, the butyl rubber itself is soft and easy to adapt, and yet has adhesiveness. However, there is a problem that it is difficult to control the amount of butyl rubber used. Furthermore, the water-stopping structure using butyl rubber 509 is not easy to check, such as being sticky and sticky to the hand.

Further, as a technique that can be applied to a water stop structure, a mold structure is known in which the outer periphery of a wire bundle is molded with a resin material (see Patent Document 1 and the like). However, in such a mold structure, if three or more wires are bundled, a gap (resin unfilled space) in which resin cannot be filled is formed between adjacent wires.
Further, these mold structures are molded by a normal injection molding machine. For this reason, an installation becomes large.
Moreover, when the sealing resin part (damming part) separately molded is match | combined in one place and it sets to the electric wire group penetration part of a partition part, the countermeasure against water entering in the mating surface of hard resin materials becomes difficult. On the other hand, if another member such as packing is used as a countermeasure against water entering the mating surfaces, the cost increases. Also, a strong pressing force is required to prevent the mating surfaces from entering with a simple lip structure. In order to give a strong pressing force to the mating surfaces of the hard resin materials, a fastening mechanism or the like is required, which also increases the cost.

  The present invention has been made in view of the above situation, and an object of the present invention is to provide a water harness countermeasure structure for a wire harness capable of taking countermeasures against water only by a combination of common hard resin materials. is there.

The above object of the present invention is achieved by the following configuration.
(1) A plurality of electric wires are arranged in the diametrical direction, are separated in a direction intersecting the arrangement direction of the electric wires, and are arranged in a plurality of stages, and encloses a part of the extending direction of the electric wire group. A hard resin material damming portion having an outer peripheral shape portion corresponding to the inner peripheral shape of the group insertion portion, and the damming portion is the wire group in each stage. A plurality of damming members that respectively surround a part of the extending direction of the wire, an engagement mechanism for merging with the other damming member, extending in the direction in which the plurality of wires are aligned, and extending the wire group A plurality of water-stopping lip pieces that protrude from the mating surfaces of the damming members at a predetermined interval along the existing direction and suppress water entry between the damming members. Filling the wire harness Countermeasure structure.

According to the countermeasure against water entry of the wire harness having the configuration (1) above, the mating surfaces of the damming members at each stage in the damming portion are in contact with each other. This mating surface is along the extending direction of the electric wire group between the electric wire groups of each stage. Accordingly, when the damming portion closes the wire group insertion portion through which the wire group penetrates, the mating surfaces of the damming members communicate with one and the other in the wire group penetration direction (that is, inside and outside of the wire group insertion portion). It will be extended. And the water stop lip piece provided in a mating surface will be extended in the arrangement direction of an electric wire. In addition, a plurality of water-stopping lip pieces are arranged at predetermined intervals along the extending direction of the electric wire group, and the water-stopping lip piece protruding from one mating surface has the tip end of the other side. Touch the mating surface. As a result, the water that has entered between the mating surfaces from the outside of the wire group insertion portion is prevented from flowing into the wire group insertion portion by the tip portion of the water stop lip piece and the mating surface that the tip portion contacts. Is done.
The water stop lip piece protruding from the damming member can be bent with a slight force, and gaps between the damming members can be eliminated. And since the water which leaked from the upstream water stop lip piece does not have strong water pressure, water entry is easily suppressed by the downstream water stop lip piece. Therefore, a separate member such as packing is not necessary, and the cost can be reduced. Further, since the damming members do not have to be pressed with a strong force, a fastening mechanism or the like is not necessary, and a simple engagement mechanism may be used.

(2) The fitting structure of the wire harness according to (1), wherein a water stop groove is provided between the plurality of water stop lip pieces on the mating surface of the damming member. .

  According to the countermeasure against water entry of the wire harness having the configuration (2), the water leaked from the upstream water stop lip piece stays in the water stop groove provided between the downstream water stop lip pieces. The water stop groove suppresses easy flow of the retained water. That is, the water stop groove serves as a buffer region (buffer) that stops easy inflow of water from the outside to the inside of the wire group insertion portion. Therefore, in this wire harness countermeasure against water entry, water that has passed through the upstream water stop lip piece can earn time until it reaches the downstream water stop lip piece.

(3) The mating surface of the other damming member facing the tip of the waterstop lip piece extends in the direction in which the plurality of electric wires are arranged along the waterstop lip piece, and the waterstop lip. The structure for preventing water entry into a wire harness according to (1) or (2) above, wherein a water-stopping rib having a tapered surface that comes into contact with the tip of the piece protrudes.

  According to the water harness countermeasure structure for a wire harness having the configuration (3), the tip of the water stop lip protruding from one mating surface is in contact with the water stop rib provided on the other mating surface. Since the water-stopping rib with which the tip of the water-stopping lip piece comes into contact has a tapered surface, the water-stopping lip piece can bend gently when the tip of the water-stopping lip piece comes into contact with the taper surface of the water-stopping rib. it can. For this reason, the water-stopping lip piece extending in the direction in which the electric wires are arranged has substantially the same elastic restoring force at an arbitrary position in the extending direction. Thereby, since the sealing pressure with respect to the water stop rib becomes uniform, the sealing performance improves the water stop lip piece bent by the reaction force from the taper surface.

  According to the water entry countermeasure structure for a wire harness according to the present invention, it is possible to make a countermeasure against entry of water only by a combination of common hard resin materials.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

It is a principal part disassembled perspective view showing the apparatus connection structure using the wire harness provided with the water-filling countermeasure structure of the wire harness which concerns on one Embodiment of this invention. It is a front view of the damming part shown in FIG. It is AA sectional drawing of FIG. It is sectional drawing of the damming members shown in FIG. 3 before uniting. It is a perspective view of a low-pressure injection molding machine. (A) is sectional drawing of the dam part which water began to enter, (b) is sectional drawing of the dam part which water leaked slightly from the upstream water stop lip piece. (A) is a cross-sectional view of a damming portion in which water that has exceeded the upstream waterstop lip piece has accumulated in the waterstop groove, and (b) is a dam in which the water that has passed through the waterstop groove has exceeded the downstream waterstop lip piece. It is sectional drawing of a stop part. (A) is a cross-sectional view of a conventional water-stop structure with one liquid water stop, and (b) is a cross-sectional view of a water-stop structure with butyl rubber.

Embodiments according to the present invention will be described below with reference to the drawings.
FIG. 1 is an exploded perspective view of an essential part showing a device connection structure using a wire harness provided with a water harness countermeasure structure for a wire harness according to an embodiment of the present invention.
The wire harness 100 including the water harness countermeasure structure for a wire harness according to the present embodiment includes an electric wire group 13 including a plurality of electric wires 11 arranged in a horizontal direction, a damming portion 15 made of hard resin, and an engagement. It has a mechanism 17 and a water stop lip piece 19.
In addition, in this embodiment, the countermeasure against water entry refers to water stopping performance that is more than drip-proof.

  The electric wire group 13 has a plurality of electric wires 11 arranged in at least one line in the diameter direction. As for each electric wire 11, the outer periphery of a conductor is coat | covered with insulating resin. “At least one row” means that a plurality of rows may be arranged in multiple stages. However, in this case, the electric wire groups at each stage are arranged apart from each other.

  In the damming portion 15, the plurality of electric wire groups 13 are spaced apart in the direction intersecting the arrangement direction of the electric wires 11 and arranged in a plurality of stages. In the present embodiment, the wire group 13 is arranged in two stages.

  As shown in FIG. 2, the damming portion 15 includes two damming members that respectively surround a part of the extending direction of the wire group 13 in each stage. In this embodiment, the damming portion 15 includes an upper damming member 21 provided in the upper wire group 13 and a lower damming member 23 provided in the lower wire group 13. The upper damming member 21 and the lower damming member 23 are integrally molded so as to surround a part in the extending direction of each electric wire group 13.

  The wire harness 100 is used for the water stop box 25, for example. In the water stop box 25, a partition wall portion 27 is formed in an integrated case, and an electric wire group insertion portion 29 is formed in the partition wall portion 27. The damming portion 15 of the wire harness 100 is fitted into the wire group insertion portion 29. That is, the wire harness 100 penetrates the partition wall portion 27 by the damming portion 15 inserted into the wire group insertion portion 29.

  The electric wire group insertion part 29 is formed in a cylindrical shape having a trapezoidal through hole 31 in a front view. The outer peripheral shape portion 33 of the damming portion 15 is formed to have a shape corresponding to the inner peripheral shape of the through hole 31. The damming portion 15 is fitted into the through hole 31 from one end side of the wire group 13. The damming portion 15 is formed to have the same cross-sectional shape at an arbitrary position in the insertion direction. The through-hole 31 has a water-stopping material (not shown) such as a seal sponge or rubber attached to the inner peripheral surface thereof, and water is stopped from the damming portion 15.

  Further, the damming portion 15 may be formed with the outer peripheral shape portion 33 with a tapered surface tapered in the insertion direction. Thereby, the damming part 15 can be brought into closer contact with the inner peripheral surface of the through hole 31 by the insertion pressure to the electric wire group insertion part 29, so that a high water-stopping property can be obtained.

  For example, an electronic device (not shown) is accommodated in the water stop box 25. A connector 35 connected to one end of the wire group 13 is connected to this electronic device. The connector 35 is accommodated in the water stop box 25, and the wire group 13 led out from the wire group insertion part 29 of the water stop box 25 is prevented from entering the water by the damming part 15. Thereby, the connector 35 is accommodated in the water stop box in which measures against entering water are taken.

  Each of the damming portions 15 is integrally molded so that the outer peripheral shape portion 33 can be defined in a state where the upper damming member 21 and the lower damming member 23 are combined. Then, the damming portion 15 that combines the upper damming member 21 and the lower damming member 23 is fitted into the wire group insertion portion 29.

  The outer peripheral shape portion 33 of the damming portion 15 can be formed, for example, in a trapezoidal cross section as illustrated. The outer peripheral shape portion 33 of the damming portion 15 is not limited to this. When the electric wire group 13 is multistage of three or more, the damming portion 15 is formed in a trapezoid shape having a high height by three or more damming members.

  As shown in FIG. 3, the lower portion of the lower damming member 23 (the surface opposite to the mating surface 37) has a lightening portion 41 that is a groove-like recess extending in the arrangement direction of the wires 11. A plurality of groups 13 are provided in the extending direction of the group 13. The lightening part 41 prevents molding defects such as sink marks and voids in the lower part of the lower damming member 23 that becomes a thick part.

  In order to mold the upper damming member 21 and the lower damming member 23, a low-pressure injection molding machine described later is used. In a low-pressure injection molding machine, for example, general engineering plastics (engineering plastics) that are hard resin materials are used. In other words, the wire harness 100 provided with the water harness countermeasure structure according to the present invention is such that a part of the wire group 13 in the extending direction is embedded (insert molding) in this engineering plastic.

  The adjacent electric wires 11 in each row may be slightly separated or in contact with each other. If it is slightly separated, the resin enters between them and the outer periphery of the electric wire 11 is surrounded to take measures against water entry. If they are in contact with each other, it is possible to take measures against water entry.

  In addition, since the plurality of electric wires 11 are arranged in a line in the diameter direction in each electric wire group 13 in the wire harness 100, an unfilled space surrounded by three or more electric wires 11 is not formed, and adjacent electric wires are formed. It is possible to reliably take water between 11 members.

  The engagement mechanism 17 provided in the damming unit 15 unites the upper damming member 21 and the lower damming member 23. The engaging mechanism 17 for uniting with the other damming member comprises a frame-shaped lock portion 43 and a lock arm 47 having a lock claw 45. In the present embodiment, the lock portion 43 is integrally formed with the lower dam member 23, and the lock arm 47 is integrally formed with the upper dam member 21. The lock arm 47 is formed in a cantilever shape, and a lock claw 45 is provided at the free end of the tip. The lock arm 47 is elastically deformed so that the lock claw 45 is engaged with the lock portion 43 and regulates the separation of the upper damming member 21 and the lower damming member 23.

  In this way, the damming portion 15 locks and locks the lock portion 43 and the lock arm 47 provided on the wire penetrating side surface 49 of the upper damming member 21 and the lower damming member 23, so that the upper damming member 15 21 and the lower dam member 23 are combined directly.

  The upper damming member 21 and the lower damming member 23 to be combined need to define the merging direction in order to prevent the mating surfaces 37 from being merged in the wrong direction. Therefore, the upper damming member 21 and the lower damming member 23 have an asymmetrical erroneous insertion preventing rib 51 and an erroneous insertion preventing recess 53 as shown in FIG. The erroneous insertion preventing rib 51 and the erroneous insertion preventing concave portion 53 coincide with each other only in the prescribed merging direction of the upper dam member 21 and the lower dam member 23. Thereby, the upper damming member 21 and the lower damming member 23 are prevented from joining the mating surfaces in the wrong direction.

  As shown in FIGS. 3 and 4, the water stop lip piece 19 extends in the direction in which the plurality of electric wires 11 are arranged. The water stop lip piece 19 is integrally formed as a thin hanging piece on the lower surface (mating surface 37) of the upper damming member 21, and the thin standing lip piece 19 is formed on the upper surface (mating surface 37) of the lower damming member 23. It is molded as a single piece.

  In the present embodiment, a pair of sliding contact walls 55 extending in the direction in which the electric wires 11 are arranged are formed on the mating surfaces 37 of the upper damming member 21 and the lower damming member 23 with the waterstop lip pieces 19 interposed therebetween. ing. Then, when the pair of sliding contact walls 55 of the lower damming member 23 enters between the pair of sliding contact walls 55 of the upper damming member 21, the upper damming member 21 and the lower damming member 23 are The relative position in the extending direction of the group 13 is positioned.

  The pair of water stop lip pieces 19 are respectively provided on the mating surfaces 37 of the damming members at predetermined intervals along the extending direction of the electric wire group 13. Each water stop lip piece 19 suppresses the water entering between the damming members when the tip part contacts the mating surface 37 on the other side.

  In addition, a water stop groove 57 is provided on the mating surface 37 of the lower dam member 23 so as to be disposed between the pair of water stop lip pieces 19. The water stop groove 57 of this embodiment is defined between a water stop rib 59 and a water stop lip piece 19 which will be described later.

  Further, in the structure for preventing water entry of the wire harness according to the present embodiment, the water stop along the water stop lip piece 19 is provided on the mating surface 37 of the mating dam member facing the tip of each water stop lip piece 19. A rib 59 is projected. The water stopping ribs 59 extend in the direction in which the electric wires 11 are arranged in the same manner as the water stopping lip piece 19. The water stop rib 59 has a tapered surface 61 that comes into contact with the tip of the water stop lip piece 19. When the upper-stage damming member 21 and the lower-stage damming member 23 are combined, the tip of the water-stopping lip piece 19 protruding from each of the upper-stage damming member 21 is in close contact with the taper surface 61 of the water-stopping rib 59 on the other side and bends. The water-stopping lip piece 19 made of a hard resin material has a sufficient elastic restoring force for a watertight seal because it is formed thin. Accordingly, a plurality of water stop lip pieces 19, water stop ribs 59, and sliding contact walls 55 are arranged on the mating surface 37 of the damming portion 15 in the water intrusion direction, and the water along the extending direction of the electric wire group 13 is arranged. It has a structure that suppresses easy passage.

  In the damming portion 15 of the present embodiment, the sliding wall 55, the water stop lip piece 19, the water stop rib 59, and the water stop groove 57 extend in the direction in which the electric wires 11 are arranged, as shown in FIG. The end portion in the extending direction is opened by the outer peripheral shape portion 33. In addition, the damming portion may not be opened by the outer peripheral shape portion 33 by closing the end portion in the extending direction with a thin wall.

FIG. 5 is a perspective view of a low pressure injection molding machine.
In the present embodiment, a low-pressure injection molding machine 63 is used for forming the upper damming member 21 and the lower damming member 23. The low-pressure injection molding machine 63 can integrally mold the upper damming member 21 or the lower damming member 23 at an intermediate position of the wire group 13. In addition, as for the water-filling countermeasure structure of the wire harness which concerns on this embodiment, of course, a normal injection molding machine may be used. The low-pressure injection molding machine 63 is a molding machine that can be operated by one worker without external power such as an electric motor. The low-pressure injection molding machine 63 includes a molding die 65, a mold clamping device (not shown), and a low-pressure injection device 67 that injects molten resin into the molding die 65 under pressure.

  The low pressure injection device 67 includes a heating cylinder 69 provided with a heater for heating and melting synthetic resin and the like, a plunger 71 for injecting molten resin in the heating cylinder from a nozzle (not shown), and an injection cylinder 73 for moving the plunger 71 forward. And a handle 75 for driving the injection cylinder 73 and a temperature controller 77 for maintaining the heating temperature of the heating cylinder 69 at a desired temperature, and these are supported by a device column 81 standing on a pedestal 79. Yes.

  The low-pressure injection molding machine 63 in the present embodiment has a maximum amount of resin that can be molded by one injection molding of about 10 g, and an air cylinder, a link, or the like when the mold is clamped This can be done manually using. Of course, the low pressure injection device 67 may drive the injection cylinder 73 by external power such as an electric motor or air. More specifically, as the low-pressure injection molding machine 63, for example, the well-known “injection molding apparatus” disclosed in JP 2010-260297 A, JP 2012-30429 A, JP 2013-103492 A, and the like. Can be used.

  The mold 65 according to this embodiment is disposed on the pedestal 79. Two types of molding dies 65 are prepared for molding the upper damming member 21 and the lower damming member 23. The molding die 65 is configured such that the upper die 83 and the lower die 85 sandwich the electric wire group 13 with the burrs 87 formed at both ends on the outer side along the extending direction of the electric wire group 13, so that the upper damming member 21 or A space (cavity 89) in which the lower dam member 23 can be formed is defined.

  That is, the upper mold 83 and the lower mold 85 have an upper mold dividing surface 91 and a lower mold dividing surface 93. An upper harness housing part 95 and a lower harness housing part 97 are provided on the upper mold parting surface 91 and the lower mold parting surface 93. When the upper die 83 and the lower die 85 are clamped, the molding die 65 defines a hollow cavity 89 therein. The upper harness housing portion 95 includes an upper portion of the cavity 89 and a burr hole 87. The lower harness housing portion 97 includes a lower portion of the cavity 89 and a burr hole 87. The burrs 87 sandwich the outer periphery of the row of electric wire groups 13 at both ends of the cavity 89 along the extending direction of the row of electric wire groups 13. In this embodiment, the burr hole 87 is formed with a flat surface between which the wire group 13 is sandwiched.

  The burr hole 87 in the lower mold 85 has a concave portion 99 that can accommodate a row of the wire group 13, and the depth from the lower mold dividing surface 93 is substantially the same as the diameter of the electric wire 11. On the other hand, the burrs 87 in the upper mold 83 are formed in a flat plate shape on the same surface as the upper mold dividing surface 91.

  The burrs 87 of the lower mold 85 and the upper mold 83 may be formed by the same concave portion 99. In this case, the concave portion 99 constituting the burr hole 87 of the lower mold 85 and the upper mold 83 has substantially the same depth as the radius of the electric wire 11 from the lower mold dividing surface 93 and the upper mold dividing surface 91.

  The molding die 65 clamps the upper die 83 and the lower die 85 in a state where the row of the wire group 13 is accommodated in the concave portion of the burrs 87 in the lower die 85. In the molding die 65 in which the concave portion 99 is provided only in the lower die 85, the electric wire group 13 is easily arranged in the lower harness housing portion 97, and it is difficult for the electric wire to be caught during clamping.

  In the molding die 65 for the lower dam member 23 shown in FIG. 5, the upper harness accommodating portion 95, the sliding contact wall 55, the water stop lip piece 19, the water stop groove 57 and the water stop rib 59 are formed (not shown). ) Is formed. Further, in the molding die 65 for the upper dam member 21 (not shown), the lower harness housing part 97, the sliding contact wall 55, the water stop lip piece 19, the water stop groove 57, and the water stop rib 59 are formed (not shown). Abbreviation) is formed.

Next, the operation of the above configuration will be described.
In the countermeasure against water entry of the wire harness according to this embodiment, the mating surfaces 37 of the upper damming member 21 and the lower damming member 23 in the damming portion 15 are in contact with each other. The mating surfaces 37 are along the extending direction of the electric wire group 13 between the pair of upper and lower electric wire groups 13. Therefore, when the damming portion 15 closes the wire group insertion portion 29 through which the pair of wire groups 13 penetrates, the mating surfaces 37 of the upper damming member 21 and the lower damming member 23 form the wire group insertion portion 29. It will extend through inside and outside.

  The water stop lip pieces 19 provided on the mating surfaces 37 extend in the direction in which the electric wires 11 are arranged. Further, the water-stopping lip pieces 19 are arranged in pairs along the extending direction of the electric wire group 13 at a predetermined interval. In contact with the mating surface 37. Thereby, the water that has entered between the mating surfaces 37 from the outside of the electric wire group insertion portion 29 is brought into contact with the electric wire group insertion portion 29 by the distal end portion of the water stop lip piece 19 and the other mating surface 37 with which the distal end portion contacts. Inflow to the inside of the is suppressed.

  The water stop lip pieces 19 projecting from the upper damming member 21 and the lower damming member 23 are bent with a slight force, and the gap between the upper damming member 21 and the lower damming member 23 can be eliminated. it can. As shown to (a) of FIG. 6, when the outer side (left side in the figure) of the electric wire group insertion part 29 is the to-be-watered area | region 101, water will pass over the slidable contact wall 55 gradually in the damming part 15. FIG. Enter inward.

  Then, as shown in FIG. 6B, the water leaking from the first (upstream) water-stopping lip piece 19 does not have a strong water pressure. Enter is suppressed. Therefore, the wire harness 100 provided with the structure for preventing water entry according to the present embodiment does not require a separate member such as packing, and the cost can be reduced. In addition, the wire harness 100 does not need to press the upper damming member 21 and the lower damming member 23 with a strong force, so that a fastening mechanism or the like is not necessary, and a simple engagement mechanism 17 may be used.

  In the water entry countermeasure structure for a wire harness according to the present embodiment, as shown in FIG. 7A, water leaking from the first water stop lip piece 19 is provided between the next water stop lip pieces 19. It stays in the water stop groove 57 formed. The water stop groove 57 suppresses an easy flow of the retained water. That is, the water stop groove 57 serves as a buffer region (buffer) that stops easy inflow of water to enter from the outside to the inside of the wire group insertion portion 29.

  Thereby, in the water-filling countermeasure structure of the wire harness of the present embodiment, the water that has passed through the first water-stopping lip piece 19 can earn time until it reaches the next water-stopping lip piece 19. As a result, as shown in FIG. 7B, sufficient time can be earned until the water finally passes through the damming portion 15.

  Further, in the wire harness countermeasure structure for a wire harness according to the present embodiment, the distal end portion of the water stop lip piece 19 protruding from one mating surface 37 contacts the water stop rib 59 provided on the other mating surface 37. Since the taper surface 61 is formed on the water stop rib 59 with which the tip of the water stop lip piece 19 is in contact, the tip of the water stop lip piece 19 comes into contact with the taper surface 61 of the water stop rib 59. It can bend gently. For this reason, as for the water stop lip piece 19 extended in the arrangement direction of the electric wire 11, the elastic restoring force of the arbitrary positions of the extension direction becomes substantially the same. Thereby, since the sealing pressure with respect to the water stop rib 59 becomes uniform, the sealing performance improves the water stop lip piece 19 bent by the reaction force from the taper surface 61.

  In the above embodiment, the case where the damming portion is composed of the upper damming member 21 and the lower damming member 23 has been described. However, in the configuration of the present invention, the damming portion is composed of three or more damming members. It is good. Thereby, the wire harness can take countermeasures against water entry to a large number of electric wire groups at the same time.

  Therefore, according to the water entry countermeasure structure of the wire harness according to the present embodiment, it is possible to make a countermeasure against water entry only by a combination of general hard resin materials.

Here, the features of the embodiment of the wire harness water countermeasure structure according to the present invention described above are briefly summarized and listed below.
[1] A plurality of electric wires (11) arranged in the diameter direction, and arranged in a plurality of stages spaced apart in a direction intersecting the arrangement direction of the electric wires,
A hard resin material damming portion (15) that surrounds a part of the wire group in the extending direction and has an outer peripheral shape portion (33) corresponding to the inner peripheral shape of the electric wire group insertion portion (29). It is a countermeasure structure against water in the harness (100),
The damming portion is
A plurality of damming members (upper damming member 21 and lower damming member 23) that respectively surround a part of the extending direction of the wire group in each stage;
An engagement mechanism (lock portion 43, lock arm 47) for uniting with the other damming member,
The water between the plurality of damming members extends in the direction in which the plurality of electric wires are arranged and projects from the mating surface (37) of the damming members at a predetermined interval along the extending direction of the electric wire group. A plurality of water-stopping lip pieces (19) for suppressing entry;
A water harness countermeasure structure for a wire harness, comprising:
[2] The water of the wire harness according to the above [1], wherein a water stop groove (57) is provided between the plurality of water stop lip pieces on the mating surface of the damming member. Incoming countermeasure structure.
[3] The mating surface of the other damming member facing the tip of the waterstop lip piece extends along the waterstop lip piece in the arrangement direction of the plurality of electric wires, and the waterstop lip. The structure for preventing water entry into a wire harness according to the above [1] or [2], wherein a water stop rib (59) having a tapered surface (61) that comes into contact with the tip of the piece protrudes.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

DESCRIPTION OF SYMBOLS 11 ... Electric wire 13 ... Electric wire group 15 ... Damping part 19 ... Water stop lip piece 21 ... Upper stage damming member (damming member)
23 ... Lower dam member (dam member)
29 ... Electric wire group insertion part 33 ... Outer peripheral shape part 37 ... Matching surface 43 ... Lock part (engagement mechanism)
47. Lock arm (engagement mechanism)
57 ... Water stop groove 59 ... Water stop rib 61 ... Tapered surface 100 ... Wire harness

Claims (3)

A plurality of electric wires arranged in the diameter direction, and arranged in a plurality of stages spaced apart in a direction intersecting the arrangement direction of the electric wires, and
A wire harness countermeasure structure for water harness comprising: a hard resin material damming portion that surrounds a part in the extending direction of the wire group and has an outer peripheral shape portion corresponding to an inner peripheral shape of the wire group insertion portion. ,
The damming portion is
A plurality of damming members each surrounding a part of the extending direction of the wire group in each stage;
An engagement mechanism for uniting with the other damming member,
While extending in the direction in which the plurality of electric wires are arranged, and protruding from the mating surface between the damming members at a predetermined interval along the extending direction of the electric wire group, water entering between the damming members is suppressed. A plurality of still water lip pieces,
A water harness countermeasure structure for a wire harness, comprising: The structure for preventing water entry into a wire harness according to claim 1, wherein a water stop groove is provided between the plurality of water stop lip pieces on a mating surface of the damming member. The mating surface of the other damming member facing the tip of the water stop lip piece extends in the direction in which the plurality of electric wires are arranged along the water stop lip piece, and the tip of the water stop lip piece. The water-filling countermeasure structure for a wire harness according to claim 1 or 2, wherein a water-stopping rib having a tapered surface that comes into contact with the portion protrudes.

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