JP2012115040A - Drainage structure of wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire harness that has excellent drainage, prevents damage to a wire exposed portion and can be produced easily and at a low cost regardless of a length of the wire exposed portion.SOLUTION: While both side parts sandwiching lower end positions of wire harness wired within a vehicle have waterproof specifications by winding tape by half-lapped winding on wires group of the wire harness or causing the wires group to be inserted through a tube, the wires group is exposed on the lower end positions, a protector with a hinge covers a lower outer surface of the area of exposed wire group and both ends of the longitudinal direction and wires group are fixed with adhesive tape. In the protector with a hinge, a rectangular base plate part, in which the length in an orthogonal direction to the electric wire longitudinal direction is long, and a thinned hinge plate part are arranged alternately in parallel with each other, the protector with hinge part is bent at the hinge plate part and arranged along the bend of the wire harness and a drainage hole is provided in the central part of the hinge plate part or the base plate part.

Description

  The present invention relates to a water draining structure for a wire harness, and more particularly to a structure for discharging water that has entered between wires of a wire harness to the outside.

  Conventionally, wire harnesses that are routed on vehicles are made by winding a group of wires with vinyl chloride tape or attaching a round tube or corrugated tube made of vinyl tube or hard vinyl tube as an exterior material. It is intended to protect the wire from external interference such as holding and restraining, or contact and rubbing.

  On the other hand, as shown in FIG. 7, in a wet area such as an engine room, the winding end X1 of the tape 102 in the portion 101 wired in the vertical direction of the wire harness 100, the branch point X2 of the wire harness 100, the connector The water droplet 103 may enter between the wires of the wire harness 100 from the upward opening X3 or the like. In this case, the water droplet 103 that has entered between the electric wires cannot be discharged to the outside from the half-wrapped tape 102 and may accumulate and reach the connector 104 by capillary action. If the connector 104 is flooded as described above, there is a risk of causing a short circuit. If the sprinkled portion is present in the flooded region, rust is generated in the splice portion, which may cause deterioration in quality.

  To solve the above problem, Japanese Patent Laid-Open No. 60-96122 (Patent Document 1) proposes a drainage structure shown in FIG. That is, the vicinity of the vehicle body panel 108 of the wire harness 105 on the engine room side is bent in a U shape and fixed with a tape 110 around the protector 109, and the bent portion 106 of the wire harness 105 fixed to the protector 109 projects downward. On the other hand, the bent portion 106 is provided with a drainage portion 107 that exposes the electric wire w without being wound with a tape. Thereby, the water that has entered between the wires w of the wire harness 105 can be discharged from the drainage portion 107.

  However, since the drainage portion 107 is an exposed portion of the wire that does not wrap the tape 110 that is the exterior material, it collides with pebbles that are flipped up while the vehicle is running, contact with the edge of the vehicle body panel, or interference by other parts. Otherwise, the electric wire cannot be protected from external forces such as pinching, and the exposed portion of the electric wire may be damaged.

  Therefore, the present applicant has proposed a protector 113 with a hinge to be attached to the wire exposed portion 112 of the wire harness 111 in Japanese Patent Application Laid-Open No. 2010-68666 (Patent Document 2). As shown in FIG. 9, the protector 113 is connected to left and right bottom plate portions 114A and 114B having a long length in the electric wire length direction through a thin hinge portion 115 provided at the center in the length direction. The left and right bottom plate portions 114A and 114B sandwiching 115 are inclined upward at a required inclination angle so as to be attached to the electric wire exposed portion. Further, at the lower end position of the protector 113, that is, in the center portion in the width direction of the position where the thin hinge portions 115 of the bottom plate portions 114A and 114B are provided, the thin hinge portions 115 are divided and the water cut into the bottom plate portions 114A and 114B on both sides. A drain hole 116 is provided, and a lid portion 117 is provided below the drain hole 116 so as to protrude from one end in the length direction of the drain hole 116 so as to cover the drain hole 116 with a gap.

  By using the hinged protector 113 as described above, the surface of the wire exposed portion 112 that is susceptible to external interference can be protected and the wire can be prevented from being damaged, and the wire exposed portion 112 serving as a drain point of the wire harness 111 can be prevented. Since the lowest end position can be easily aligned with the lower end position of the protector 113 provided with the drain hole 116, it is possible to discharge water that has entered between the electric wires to the outside from the drain hole 116. It becomes.

JP-A-60-96122 JP 2010-68666 A

  On the other hand, since the size of the wet area is different between a large vehicle such as a truck and a small vehicle such as a motorcycle, the dimensions of the wire exposed portion 112 of the wire harness 111 are also different. Accordingly, when applying the hinged protector 113 of Patent Document 2 to draining a wire harness that is routed to a large vehicle or to draining a wire harness that is routed to a small vehicle, the dimensions of the wire exposed portion 112 to be attached The design of the protector 113 in accordance with the above, that is, the bottom plate portions 114A and 114B, the thin hinge portion 115, the drain hole 116, and the lid portion 117 that covers the drain hole 116 must be dimensioned and positioned. There is a problem that it is difficult.

  The present invention has been made in view of the above problems, and is excellent in a draining structure of a wire harness that removes water that enters through a gap between an electric wire group of the wire harness and an exterior material and enters the inside by a capillary phenomenon. An object is to provide drainage, prevent damage to the exposed wire portion, and easily and inexpensively manufacture regardless of the length of the exposed wire portion.

In order to solve the above-mentioned problem, the present invention is configured such that both side portions sandwiching the lower end position of a wire harness routed in a vehicle are half-wrapped with a tape around a wire group of a wire harness, or a resin round tube or corrugated tube While being waterproofed through the tube, the lower end position exposes the wire group without tape winding or passing through the tube,
Cover the lower outer surface of the area where the wire group is exposed with a protector with a hinge, and fix both ends in the length direction and the wire group with an adhesive tape,
The hinged protector is configured such that a rectangular board portion having a long length in a direction perpendicular to the length direction of the electric wire and a thin hinge plate portion are alternately arranged in parallel and bent at the hinge plate portion to bend the wire harness. A drainage structure for a wire harness is provided, wherein the drainage hole is provided along the hinged protector and a drainage hole is provided at a central position of the hinge plate portion or the substrate portion.

As described above, in the drainage structure of the present invention, as a protector to be attached to a region where the wire group is exposed (hereinafter referred to as a wire exposed portion) at the lower end position of the wire harness routed in the vehicle, The protector with a hinge which used the rectangular board | substrate part to which an orthogonal direction becomes long, and the thin hinge board part was alternately arranged in parallel is used. That is, the length of the board in parallel with the hinged protector in the length direction of the electric wire, in other words, the parallel distance between the hinge plates is shorter than the length in the direction perpendicular to the length of the electric wire, thereby the hinge plate. The protector can be flexed flexibly at the portion, and the protector can be smoothly along the curve of the exposed portion of the electric wire. Therefore, by covering the hinged protector on the lower outer surface of the exposed wire portion, the lower outer surface of the exposed wire portion that is most susceptible to external interference can be reliably protected and wire damage can be effectively prevented. .
In addition, it is preferable to set it as L1: L2 = 1: 1.5-3 as ratio L1: L2 of the dimension L2 of the electric wire length direction of the said board | substrate part and the dimension L2 of an electric wire length direction and an orthogonal direction. The ratio L1: L3 of the dimension L1 of the board portion in the electric wire length direction and the dimension L3 of the hinge plate portion in the electric wire length direction is preferably L1: L3 = 1 to 2: 1.

  Moreover, in the protector with a hinge, the drain hole is provided in the center position of each hinge board part or each board | substrate part paralleled by the comparatively narrow space | interval as mentioned above. Therefore, even if the size of the drainage hole is smaller than the drainage hole provided at the lower end position of the conventional protector, the plurality of drainage holes provided at narrow intervals over the entire length of the protector with hinges in the wire exposed portion. The draining effect can be enhanced. Further, since the size of the drain hole can be made smaller than the drain hole of the conventional protector, it is not necessary to provide a cover for covering the drain hole, and the structure of the protector can be simplified.

  Moreover, the protector with a hinge in the present invention has a structure in which the substrate portions and the hinge plate portions are alternately arranged in parallel. Therefore, even if the length of the exposed wire part to which the protector with hinge is attached is different, it is suitable for the exposed wire part to be attached only by changing the parallel number of the board part and the hinge plate part according to the length of the exposed wire part. A hinged protector can be manufactured easily and at low cost.

  The board portion includes both side portions bent at both ends in the longitudinal direction, the both side portions have a trapezoidal shape with a protruding end side being short, the both side portions surround both side portions of the wire harness, and the hinge plate It is preferable that the drain hole is provided in the part.

  As described above, by providing both side portions bent at both ends in the longitudinal direction of the substrate portion and surrounding both side portions of the wire harness with the both side portions, the wire protection performance can be further enhanced. In addition, by making the both side portions provided at both ends in the long direction of the substrate portion into a trapezoidal shape with the protruding end side being short, the adjacent side portions are brought into contact with each other when the hinged protector is curved. Therefore, the protector can be easily bent. Moreover, a clearance gap is formed in the both sides of the longitudinal direction of each hinge board part by making the said both sides into trapezoid shape. Therefore, drainage from the gap as well as drainage from the drainage hole provided in the hinge plate part is possible, so that the drainage effect of the exposed wire portion can be further enhanced.

  It is preferable that the substrate portion and the hinge plate portion are continuously formed in a state of being alternately arranged in parallel, and are used by being cut according to the length of the exposed wire group of the wire harness. .

  If a continuous body in which the substrate portion and the hinge plate portion are alternately arranged in advance is formed in advance, a necessary length is cut from the continuous body according to the length of the exposed wire exposed portion. Only by this, the protector with a hinge suitable for this electric wire exposure part can be manufactured easily and at low cost. In particular, a water drainage hole is provided in each of the hinge plate portions arranged in parallel, and cutting along a cutting line that divides the water drainage hole of a predetermined hinge plate portion makes it easier to cut and improves workability. Can be increased.

  As described above, according to the present invention, as a protector to be attached to the wire exposed portion at the lower end position of the wire harness that is routed in the vehicle, the rectangular substrate portion that is long in the direction perpendicular to the wire length direction and the thin hinge A hinged protector in which the plate portions are alternately arranged in parallel is used. That is, the dimension of the board portion arranged in parallel with the hinged protector in the length direction of the electric wire, in other words, the parallel spacing of the hinge plate portions is made shorter than the dimension in the direction perpendicular to the length direction of the electric wire, thereby exposing the electric wire. The protector can smoothly follow the curvature of the part, and thus the lower outer surface of the wire exposed part that is most susceptible to external interference can be ensured by covering the hinged protector on the lower outer surface of the wire exposed part. It can protect and effectively prevent electric wire damage.

  Further, in the protector with a hinge, since the drain hole is provided at the center position of each hinge plate portion or each substrate portion arranged in parallel at a relatively narrow interval as described above, the size of the drain hole is reduced. However, the draining effect in the wire exposed portion can be enhanced by a plurality of draining holes provided at narrow intervals over the entire length of the hinged protector. Further, since the size of the drain hole can be made smaller than the drain hole of the conventional protector, it is not necessary to provide a cover for covering the drain hole, and the structure of the protector can be simplified.

  In addition, since the protector with a hinge in the present invention has a structure in which the substrate portions and the hinge plate portions are alternately arranged in parallel, even if the length of the exposed wire portion to which the protector with a hinge is attached is different, A protector with a hinge suitable for an electric wire exposed portion to be attached can be manufactured easily and at low cost simply by changing the parallel number of the substrate portion and the hinge plate portion according to the length of the electric wire exposed portion.

It is a principal part fracture perspective view showing the state where the wire harness provided with the drainage structure of this embodiment was wired in the vehicle. The protector with a hinge of FIG. 1 is shown, (A) is a lower surface side perspective view, (B) is an upper surface side principal part enlarged perspective view. (A) is a lower surface side perspective view before attaching a protector with a hinge to an electric wire exposure part, (B) is a lower surface side perspective view after attaching the protector with a hinge to an electric wire exposure part. It is a lower surface side perspective view of the continuous body which made the board | substrate part and the hinge board part parallel alternately before obtaining the protector with a hinge in this embodiment by cutting | disconnection. It is a principal part fracture perspective view showing the state where the wire harness which provided the drainage structure similar to this embodiment, and passed both sides which pinched an electric wire passage through a corrugated tube, and was made into waterproof specifications was arranged in vehicles. It is a lower surface side perspective view which shows another example of a protector with a hinge. It is drawing which shows a prior art example. It is drawing which shows a prior art example. It is drawing which shows a prior art example.

Hereinafter, an embodiment of a draining structure for a wire harness of the present invention will be described with reference to the drawings.
1 to 4 show an embodiment of the present invention.
In this embodiment, as shown in FIG. 1, the water draining structure of the present invention is applied to a wire harness 10 routed in an engine room of an automobile. The wire harness 10 is inserted into a grommet 32 attached to the through hole 31 of the vehicle body panel 30 that partitions the engine room X and the vehicle compartment Y of the automobile, and a drainage wire is connected to the engine room X side in the vicinity of the attachment position of the grommet 32. An exposed portion 11 is formed. That is, the wire exposed portion 11 at the lower end position of the wire harness 10 exposes the wire group W without being half-wrapped with a tape, while the regions other than the wire exposed portion 11, that is, both sides sandwiching the wire exposed portion 11. 12 and 13 are waterproofed by half-wrapping with an adhesive tape 14A, and the side portions 12 and 13 are inclined upward toward the tip.

In the present embodiment, a protector 15 with a hinge made of resin is attached to the wire exposed portion 11 of the wire harness 10. As shown in FIGS. 2A and 2B, the hinged protector 15 has rectangular substrate portions 16 and thin hinge plate portions 17 alternately arranged in parallel, and the substrate portion 16 has an electric wire length direction. The length is short and the length in the direction perpendicular to the length of the wire is long. In the present embodiment, the ratio L1: L2 between the dimension L1 of the board portion 16 in the wire length direction and the dimension L2 in the direction perpendicular to the wire length direction is set to L1: L2 = 1: 1.7. The ratio L1: L3 of the dimension L1 of the board portion 16 in the electric wire length direction and the dimension L3 of the hinge plate portion 17 in the electric wire length direction is set to L1: L3 = 1.5: 1.
In addition, a rectangular drain hole 19 is provided at the center position of the hinge plate portions 17 arranged in parallel, and at both ends of the substrate portion 16 in the direction perpendicular to the electric wire length direction, Both side portions 18 bent at 90 degrees with respect to 16 are provided, and the shape of the both side portions 18 is a trapezoid whose projecting end side is short.

  As shown in FIGS. 3A and 3B, the hinged protector 15 having the above-described structure is configured such that the board portion 16 and the hinge plate portion 17 cover the lower outer surface of the wire exposed portion 11 of the wire harness 10 and both side portions 18 are formed. The wire exposed part 11 is covered so as to surround both sides of the wire exposed part 11, and both ends in the longitudinal direction are fixed to the half wrap winding portions of the both side parts 12 and 13 of the wire harness 10 by the adhesive tape 14A with the adhesive tape 14B. ing. 3A and 3B are both perspective views seen from the lower surface side.

  First, the protector 15 with the hinge is formed by injection molding a continuous body 20 (see FIG. 4) in which the substrate portions 16 and the hinge plate portions 17 are alternately arranged in parallel, and depending on the length of the wire exposed portion 11 to be attached, It is manufactured by cutting a necessary length from the continuous body 20. In this embodiment, the protector 15 with a hinge is obtained by cut | disconnecting along the cutting lines CL1 and CL2 which divide the drain hole 19 of the predetermined hinge board part 17. FIG.

  As described above, as a protector to be attached to the wire exposed portion 11 at the lower end position of the wire harness 10 to be wired in the vehicle, the rectangular base plate portion 16 whose length is perpendicular to the wire length direction, and the thin hinge plate portion The hinged protector 15 in which 17 is alternately arranged in parallel is used. That is, the dimension in the electric wire length direction of the board part 16 arranged in parallel with the protector 15 with the hinge, in other words, by making the parallel interval of the hinge plate part 17 shorter than the dimension in the direction perpendicular to the electric wire length direction, The protector 15 can be flexibly bent by the hinge plate portion 17 so that the protector 15 can smoothly follow the curve of the exposed wire portion 11. Therefore, by covering the lower outer surface of the wire exposed portion 11 with the hinged protector 15, the lower outer surface of the electric wire exposed portion 11 that is most susceptible to external interference is reliably protected by the substrate portion 16 and the hinge plate portion 17. Wire damage can be effectively prevented.

  Moreover, in the protector 15 with a hinge, since the drain hole 19 is provided in the center position of each hinge board part 17 arranged in parallel with a comparatively narrow space | interval as mentioned above, even if the magnitude | size of the drain hole 19 is made small. The draining effect in the exposed wire portion 11 can be enhanced by the plurality of draining holes 19 provided at narrow intervals over the entire length of the hinged protector 15. Moreover, since the size of the drain hole 19 can be made smaller than the drain hole of the conventional protector, it is not necessary to provide a cover for covering the drain hole 19 and the structure of the protector 15 can be simplified.

  Further, as described above, by providing both side portions 18 bent at both ends in the longitudinal direction of the substrate portion 16 and surrounding both sides of the wire harness 10 with the both side portions 18, the wire protection performance can be further enhanced. Further, by forming the side portions 18 provided at both ends in the longitudinal direction of the substrate portion 16 into a trapezoidal shape in which the protruding end side is short, the side portions 18 adjacent to each other when the hinged protector 15 is curved. The contact can be prevented and the protector 15 can be easily bent. Moreover, the clearance gap S is formed in the both sides of the longitudinal direction of each hinge board part 17 by making the both sides 18 into trapezoid shape. Therefore, the drainage effect of the wire exposed portion 11 can be further enhanced by allowing drainage from the gap S as well as drainage from the drainage hole 19 provided in the hinge plate portion 17.

  Moreover, if the continuous body 20 in which the board | substrate part 16 and the hinge board part 17 were paralleled as mentioned above is formed previously, according to the length of the electric wire exposure part 11 to attach, it will be required length from the said continuous body 20. The hinged protector 15 suitable for the electric wire exposed portion 11 can be manufactured easily and at low cost simply by cutting the portion. In particular, by providing the drain holes 19 in the parallel hinge plate portions 17 as described above, and cutting along the cutting lines CL1 and CL2 that divide the drain holes 19 of the predetermined hinge plate portions 17. Cutting becomes easy and workability can be improved.

In this embodiment, both side parts 12 and 13 sandwiching the electric wire exposed part 11 are half-wrapped with an adhesive tape 14A so as to be waterproof, but the both side parts 12 and 13 are made of a resin corrugated tube 21 as shown in FIG. Alternatively, it may be packaged with a round tube or the like.
Moreover, in this embodiment, although the drain hole 19 is provided in the center position of each hinge board part 17 which the protector 15 with a hinge parallels, as shown in FIG. A drain hole 19 may be provided.

DESCRIPTION OF SYMBOLS 10 Wire harness 11 Electric wire exposed part 12, 13 Both side part 14A, 14B Adhesive tape 15 Protector with hinge 16 Board | substrate part 17 Hinge board part 18 Both side part 19 Water drain hole 21 Corrugated tube

Claims (3)

Both ends sandwiching the lower end position of the wire harness routed to the vehicle are half-wrapped with tape around the wire group of the wire harness, or are made waterproof through a tube made of a resin round tube or corrugated tube, while the lower end In the position, expose the wire group without passing the tape or tube,
Cover the lower outer surface of the area where the wire group is exposed with a protector with a hinge, and fix both ends in the length direction and the wire group with an adhesive tape,
The hinged protector is configured such that a rectangular board portion having a long length in a direction perpendicular to the length direction of the electric wire and a thin hinge plate portion are alternately arranged in parallel and bent at the hinge plate portion to bend the wire harness. A drainage structure for a wire harness, wherein the drainage hole is provided along the hinged protector, and a drainage hole is provided at a central position of the hinge plate portion or the substrate portion.   The board portion includes both side portions bent at both ends in the longitudinal direction, the both side portions have a trapezoidal shape with a protruding end side being short, the both side portions surround both side portions of the wire harness, and the hinge plate The drainage structure of the wire harness according to claim 1, wherein the drainage hole is provided in a portion.   2. The substrate portion and the hinge plate portion are continuously formed in an alternately parallel state, and are used by cutting in accordance with the length of the exposed wire group of the wire harness. Or the draining structure of the wire harness of Claim 2.

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