JP5733084B2 - Protector for wire harness - Google Patents

Description

  The present invention relates to a protector for a wire harness, and more specifically, is used as a protector for a door harness that is routed from a vehicle door to a vehicle body and reciprocates according to the opening and closing of the door, and the door harness smoothly passes through the protector. It is intended to make it possible to move, reduce wear and noise during movement, and prevent flooding when the door is released.

  Conventionally, the present applicant has provided the protector 100 shown in FIG. 6 by Unexamined-Japanese-Patent No. 2004-106606 as a protector for this kind of door harness. The protector 100 fixed inside the door has a guide movable pin 102 and a fixed pin 103 projectingly provided in a rectangular case 101, the door harness 110 is passed through the case 101, and a case outlet 101a facing the vehicle body is provided. Further, the door harness 110 is pulled out. In the case 101, the door harness 110 is guided by pins 102 and 103 and accommodated in a Z shape to absorb the extra length. Moreover, the drawer side of the door harness 110 is covered with a corrugated tube 120.

  In the protector, the extra length portion 110a of the door harness 110 is bent and accommodated in a Z shape as shown in FIG. 6A when the door is closed. When the door is opened, as shown in FIG. 6 (B), the door harness 110 moves the movable pin 102 in the case 101, and the door harness 110 is pulled out in a state of being deformed from the Z shape to the substantially L shape.

JP 2004-106606 A

As long as the extra length 110a of the door harness 110 can move smoothly from FIG. 6 (A) to FIG. 6 (B) and from FIG. 6 (B) to FIG. In many cases, the door harness has high rigidity and the deformation movement cannot be smoothly performed. Further, when the volume of the case 101 is small and the bending radius is small, and the bending performance of the door harness is low, the wire harness is forcibly bent repeatedly, and there is a possibility that the electric wire constituting the door harness may be disconnected. .
Further, the corrugated tube 120 is externally mounted on the door harness 110 that is pulled out from the case 101 when the door is opened, and the portion of the door harness 110 that is externally covered with the corrugated tube 120 is pulled into the case 101 when the door is closed. At this time, if the corrugated tube 120 is pulled along with the case 101 in a stable state, the corrugated tube 120 and the case 101 come into sliding contact and contact wear occurs. If a gap is formed so that contact wear does not occur, there is a problem that abnormal noise is generated by contact due to vibration.

  The present invention has been made in view of the above problems, and allows the door harness to move smoothly in the case of the protector, and wears between the corrugated tube and the case that covers the door harness when the door harness is moved. The problem is to eliminate the generation of abnormal noise.

In order to solve the above-mentioned problems, the present invention is a protector that movably accommodates a door harness that is fixed in a door, routed inside the door, and pulled out to the vehicle body side,
The door harness outlet is positioned facing the vehicle body, and a pair of rollers are rotatably installed at opposing positions of a passage continuing to the outlet, and the corrugated tube facing the exterior of the door harness has an opposing surface. A pair of rollers are contacted simultaneously , and the roller rotates according to the movement of the corrugated tube when the door harness moves ,
An outlet of the protector is disposed in a vehicle compartment from a weather strip attached to the door, and when the door harness is pulled out from the outlet, a waterproof rubber tube is attached to the corrugated tube so as not to reach the roller. There is provided a protector for a wire harness that is fitted and fixed and has an annular seal lip provided on the outer peripheral surface of the waterproof rubber tube in sliding contact with the inner peripheral surface of the protector passage .

  As described above, since the roller is rotatably interposed between the corrugated tube and the protector that are externally mounted on the door harness, the corrugated tube and the protector can be in sliding contact to prevent wear.

The pair of rollers are formed of an elastic material made of rubber or elastomer.
In this way, when the roller is formed of an elastic material, it is possible to suppress the generation of abnormal noise at the time of contact, and the roller functions as a cushion material, and can cope with even a slight deformation of the corrugated tube. In addition, it is good also as a resin roller instead of an elastic body.

It is preferable that the pair of rollers have a gear shape having a crest and a trough on the outer peripheral surface, and the crest and trough are meshed with the trough and the crest of the corrugated tube.
If the corrugated tube is a rack, the roller is a pinion that meshes with the rack, and the door harness is moved by the movement of the door harness and the corrugated tube by opening and closing the door, and the door harness moves by the moment of inertia of the rotation of the roller. When it becomes difficult, the door harness and the corrugated tube can move smoothly by assisting the movement of the corrugated tube.

As described above, the outlet of the protector is disposed in the vehicle compartment from the weather strip attached to the door, and the waterproof rubber tube is disposed at a position where the roller harness does not reach when the door harness is pulled out from the outlet. fitted and fixed to corrugated tube, that has to sliding contact with an annular sealing lip which is provided on the outer peripheral surface of waterproof rubber tube on the inner peripheral surface of said protector passage.

  As described above, when the inner peripheral surface of the passage continuing to the outlet opening that opens to the vehicle body is in contact with the outer peripheral surface of the waterproof rubber tube that is externally fitted to the door harness, water is generated from the outlet of the protector when the door is opened. In addition, even if water enters the protector through the outer peripheral surface of the corrugated tube, the waterproof rubber tube can block the water and prevent water from entering the door.

The protector is provided with an extra length accommodating portion that can be accommodated by bending the wire harness continuously in the passage contacting the waterproof rubber tube.
Specifically, the protector has a shape including a right triangle and a trapezoidal shape having bent portions at a plurality of locations, but the door harness is not bent with a small radius.

  As described above, in the present invention, the roller is rotatably attached to the protector attached to the inside of the door, and is in contact with the corrugated tube externally mounted on the door harness that moves in the protector according to the opening and closing of the door. The wear due to the sliding contact between the protector and the corrugated tube can be reduced or prevented.

It is drawing which shows the attachment site | part of the protector of embodiment of this invention. It is sectional drawing of the said protector. The roller attachment part of the said protector is shown, (A) is a principal part enlarged view of the main body of a protector, (B) is drawing which shows the main body and lid | cover of a roller attachment part. The state which attached the waterproof rubber pipe | tube to the corrugated tube sheathed in the wire harness penetrated in the said protector is shown, (A) is a front view, (B) is the BB sectional drawing of (A). It is drawing which shows the protector of reference embodiment. (A) (B) is drawing which shows a prior art example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiments are shown in FIGS.
As shown in FIG. 1, a body 4 of a protector 3 made of a resin molded product is fixed to a door frame 2 of a side door 1 of an automobile, and after being routed inside the side door 1 to the body 4, it is pulled out to the body 6 side. After the door harness 10 is inserted, the lid 5 (shown in FIG. 3) is placed over the side opening of the main body 4 and closed. A door trim (not shown) is attached to the attachment side of the lid 5.

  A weather strip 7 is attached to the vehicle body facing surface 2a of the door frame 2 facing the vehicle body 6 that is hinged to the side door 1, and the main body of the protector 3 is located on the vehicle compartment side from the mounting position of the weather strip 7. The door harness 11 for the door harness 4 is opened.

  As shown in FIG. 2, the protector 3 composed of the main body 4 and the lid 5 has a substantially right triangle shape, and the outlet 11 is provided at the tip of the lateral passage 12 with the bottom extended. A door harness in which a triangular extra length accommodating portion 13 is provided at the other end of the lateral passage 12, an upward passage 14 is provided at the upper end of the extra length accommodating portion 13, and the tip of the upward passage 14 is routed inside the door. Ten service openings 15 are provided. The surplus length accommodating portion 13 has a shape surrounded by an upper side 13a of an oblique side, an L-shaped bottom side 13b, and a vertical side 13c.

  When the side door 1 is opened, the door harness 10 is pulled out from the outlet 11 toward the vehicle body, and the door harness 10 is placed along the upper side of the oblique side as shown in FIG. . On the other hand, when the door is closed, the door 11 is pulled in from the outlet 11, and the extra length portion 10a of the door harness is accommodated in the extra length accommodating portion 13 while being bent into an L shape.

  The transverse passage 12 of the protector 3 is arranged in a straight line in the horizontal direction, and has a straight tube shape with an elliptical cross section. The outlet 11 that extends and inclines outward is connected to the tip of the lateral passage 12.

In the lateral passage 12 close to the outlet 11, gear-like rollers 17 (17 </ b> A and 17 </ b> B) are disposed in notches 12 c (shown in FIG. 3) provided to face the upper and lower peripheral walls 12 a and 12 b, respectively. One end of the main shaft 18 fixed to the center of the roller 17 is rotatably supported by a bearing 19A fixed to the upper and lower peripheral walls 12a and 12b, and the other end of the main shaft 18 is rotatably supported by a bearing 19B provided on the lid 5. ing.
In this way, the protector 3 is rotatably mounted with rollers 17 (17A, 17B) facing the top and bottom at positions adjacent to the outlet 11, and the semi-circular portion on the opposite side of these rollers 17A, 17B is disposed in the lateral passage 12. Protruding. The roller 17 is made of an elastomer, and crests and troughs are provided at a constant pitch on the outer peripheral surface.

On the other hand, the door harness 10 that is pulled out from the inside of the door to the vehicle body side through the protector 3 externally fixes the corrugated tube 20 from the front end of the vehicle body connection side to a region located on the door inner side from the roller 17 when the door is opened. This is to protect the door harness drawn out to the external space between the vehicle body and the door and to prevent sliding wear with the protector 3.
The corrugated tube 20 is formed of a resin molded product in which annular crests 20a and troughs 20b are alternately provided in the axial direction, and the corrugated tube 20 of the present embodiment has a long cylindrical shape with a vertically long cross section as shown in FIG. .

  The pitches of the crests 20a and troughs 20b of the corrugated tube 20 are matched with the pitches of the crests 17m and troughs 17v of the pair of upper and lower rollers 17 provided in the protector 3. Thus, the upper and lower sides of the corrugated tube 20 are so-called racks, the pair of upper and lower gear-shaped rollers 17 are pinions, and the racks and pinions are engaged with each other on the upper and lower sides. Therefore, when the door harness 10 moves according to the door opening / closing operation and the corrugated tube 20 moves together with the door harness 10, the upper and lower rollers 17 are forcibly rotated. Thus, when the upper and lower rollers 17 are rotated, when the movement of the door harness 10 and the corrugated tube 20 cannot be smoothly performed due to the rigidity or bending resistance of the door harness, the door harness 10 is rotated by the roller 17 having a momentum to rotate. The movement of the corrugated tube 20 is assisted.

  Further, as shown in FIG. 4, a waterproof rubber tube 25 is externally fitted and fixed at a position close to the other end 20 b of the corrugated tube 20 located in the protector 3 even when the door is opened. The waterproof rubber tube 25 has a shape having an inner peripheral surface 25 a that is in close contact with the outer peripheral surface of the peak portion 20 a of the corrugated tube 20, and the outer peripheral surface 25 b has a shape along the inner peripheral surface of the lateral passage 12 of the protector 3. . Further, an annular seal lip 25c is provided at the center of the outer peripheral surface 25b in the width direction so that the seal lip 25c is in sliding contact with the inner peripheral surface of the lateral passage 12, and is movable waterproof rubber that moves with the corrugated tube 20 It becomes a tube. The waterproof rubber tube 25 is made of oil-impregnated rubber so that wear during sliding contact with the protector 3 made of a resin molded product can be reduced.

  The protector 3 equipped with the roller 17 having the above-described configuration is attached to the inside of the side door 1, the corrugated tube 20 is externally mounted on the vehicle body drawer side, and the door harness 10 having a waterproof rubber tube 25 fitted and fixed to the corrugated tube 20 is side-mounted. In addition to being routed inside the door 1, the protector 3 is pulled out from the outlet 11 toward the vehicle body through the protector 3 and assembled, and then the body 4 of the protector 3 is covered with a lid 5 and fixed. The lid 5 and the main body 4 are fixed by fitting and locking a lock piece (not shown) protruding from the outer peripheral surface of the lid 5 to the lock frame 4 r of the main body 4.

  A door harness 10 having a corrugated tube 20 exterior is assembled in the protector 3 so that the side door 1 is assembled in an automobile. When the side door 1 is opened, the door harness 10 is pulled out to the vehicle body side and extended. The extra length portion 10 a of the door harness 10 is accommodated in the bent state in the extra length accommodating portion 13 of the protector 3.

When the door harness 10 reciprocates with the opening and closing of the side door 1, the corrugated tube 20 that is externally mounted on the door harness 10 moves straight in the horizontal direction in the lateral passage 12 of the protector 3. At that time, as the corrugated tube 20 moves, the pair of upper and lower rollers 17 are driven to rotate. When the door is closed, the door harness 10 is bent into an L shape in the extra length accommodating portion 13 continuous to the lateral passage 12, so that the door harness 10 may be temporarily difficult to move due to the rigidity and bending resistance of the door harness 10. Arise. At that time, the pair of upper and lower rollers 17 rotated by the movement of the corrugated tube 20 continues to rotate due to inertia, and assists the movement of the corrugated tube 20 that has become difficult to move. Therefore, the load on the door harness 10 can be reduced during repeated reciprocating movement of the door harness accompanying opening and closing of the door, and the bending performance of the door harness 10 can be prevented from being lowered, and the electric wires constituting the door harness can be prevented from being disconnected.
The waterproof rubber tube 25 with the corrugated tube 20 fitted outside when the door is opened does not reach the position of the roller 17, and keeps the state where the seal lip 25 c is in contact with the inner peripheral surface of the lateral passage 12.

  In the protector 3, the extra length portion 10a of the door harness 10 is merely bent from a straight line inclined when the door is closed to a substantially L shape, so that the bending radius of the door harness 10 is large and the load on the electric wire is small. The occurrence of disconnection can be prevented.

  Furthermore, since the door harness outlet 11 is provided on the indoor side of the weather strip 7 when the side door 1 is closed, the weather strip 7 can prevent water from entering the outlet 11 from the outside of the vehicle. On the other hand, when the side door 1 is opened, water may be applied directly to the outlet 11, or water may be generated in the outlet 11 through the corrugated tube 20 that is externally attached to the extracted door harness. At that time, since the seal lip 25c of the waterproof rubber tube 25 fitted on the corrugated tube 20 is moved in sliding contact with the entire inner peripheral surface of the lateral passage 12 of the protector 3, water intrusion into the lateral passage 12 is caused by the seal lip 25c. Can be blocked.

FIG. 5 shows the main body 30 of the protector according to the reference embodiment , and the lid has an outer shape equivalent to that of the main body 30, and therefore the illustration is omitted.

The body 30 of the protector is bent into a trapezoidal shape along the length direction between the door harness outlet 30a on the vehicle body facing side and the inlet 30b on the other end side. In the body 30 of the protector, when the door is closed, the door harness 10 is largely bent along the bent shape of the body 30 to absorb the extra length when the door is closed. On the other hand, when the door is opened, the degree of bending is reduced so that only the required length can be pulled out.
As described above, the shape of the protector is not limited as long as the door harness is not bent with a small radius in the protector.

  The pair of rollers 17 that are rotatably attached to the protector have a gear shape. However, the pair of rollers 17 is not necessarily a gear shape, and may be a cylindrical roller. When the outer peripheral surface of the roller is brought into contact with the peak portion of the corrugated tube, the roller rotates by the movement of the corrugated tube, and the movement of the corrugated tube can be assisted by the rotation of the roller by inertia.

DESCRIPTION OF SYMBOLS 1 Side door 2 Door frame 3 Protector 4 Main body 5 Lid 6 Car body 7 Weather strip 10 Door harness 11 Drawer outlet 12 Lateral passage 13 Surplus length accommodating part 17 (17A, 17B) Roller 20 Corrugated tube 25 Waterproof rubber tube

Claims (4)

A protector that movably accommodates a door harness that is fixed in the door, routed inside the door, and pulled out to the vehicle body side,
The door harness outlet is positioned facing the vehicle body, and a pair of rollers are rotatably installed at opposing positions of a passage continuing to the outlet, and the corrugated tube facing the exterior of the door harness has an opposing surface. A pair of rollers are contacted simultaneously , and the roller rotates according to the movement of the corrugated tube when the door harness moves ,
An outlet of the protector is disposed in a vehicle compartment from a weather strip attached to the door, and when the door harness is pulled out from the outlet, a waterproof rubber tube is attached to the corrugated tube so as not to reach the roller. A protector for a wire harness that is fitted and fixed, and an annular seal lip provided on the outer peripheral surface of the waterproof rubber tube is in sliding contact with the inner peripheral surface of the protector passage .   The protector for a wire harness according to claim 1, wherein the pair of rollers is formed of an elastic body made of rubber or elastomer.   The pair of rollers has a gear shape in which a crest and a trough are provided on an outer peripheral surface, and the crest and trough are meshed with a trough and a crest of the corrugated tube. Protector for wire harness. The protector for wire harnesses of any one of Claim 1 thru | or 3 which has provided the surplus length accommodating part which can bend and accommodate the said wire harness continuously in the said channel | path which contacts the said waterproof rubber pipe. .

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