JP2006213222A - Power supply device of sliding door for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power supply device of a sliding door for a vehicle, for surely preventing unreasonable bending force from acting on a wire harness, due to the expansion and contraction of the wire harness caused by a slide of a sliding door, while simplifying a structure. <P>SOLUTION: This power supply device of the sliding door for a vehicle, has on the sliding door 1 side a power supply harness protector 2 for storing the wire harness 6 folded back in a U-shape and extracting both ends of the wire harness 6 from two openings 4 and 5 on one end side; and is constituted so that the wire harness 6 in the protector 2 is inserted into a coil spring 11, and when opening the sliding door 1, the coil spring 11 is compressed by extracting one end side of the wire harness 6 fixed to the vehicle body 8 side from the inside of the protector 2; and is constituted so that the compressed coil spring 11 tends to return to an original state by its spring force when closing the sliding door 1, and the extracted wire harness 6 is returned in the protector 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention uses a power supply harness protector in which a wire harness is flexibly accommodated in order to connect a slide door of an automobile such as a one-box car and a vehicle body with a wire harness so that power is always supplied to the slide door side. The present invention relates to a power supply device for a sliding door for a vehicle.

  In a sliding door of an automobile such as a one-box car, a wire harness is routed from the vehicle body to the sliding door in order to supply power and signal current from the vehicle body side to auxiliary equipment such as electrical components on the sliding door side. And it accommodates in the curved state inside the protector made from a synthetic resin provided in the slide door, and is made to respond | correspond to the expansion / contraction of the wire harness accompanying opening and closing of a slide door.

  The wire harness is fixed by a harness fixing tool, for example, at a step portion on the vehicle body side. The wire harness is usually accommodated in a protective tube such as a corrugated tube made of synthetic resin. The structure of the power supply harness protector has a wide wall portion on the front and back sides and a narrow wall portion continuous in the top and front and back, and a slit-like front and rear long opening in the lower portion. The protector is fixed to a metal door panel at a plurality of locations around the front side with bolts and clips, and a synthetic resin door trim (trim cover) is located close to or in contact with the back side. The door trim is fixed to the door panel with bolts and clips.

  In the conventional structure described above, auxiliary equipment such as a power window motor and a window opening / closing unit is arranged in the slide door in addition to the protector. Therefore, the position of the protector is limited to the lower side of the slide door. When the door is fully closed, the harness fixture on the step of the vehicle body is positioned above the lower opening (harness outlet) of the protector, and when the harness fixture comes closest to the rear end of the protector in this state, the wire Since the harness is led out from the rear end side of the lower opening of the protector while being bent to a small diameter, a large bending force acts on the wire harness, and it is repeated especially in models with high sliding door opening and closing frequency, such as commercial vehicles. There was a concern that the wire harness would be easily damaged by the bending. In addition to the above reason, the protector is disposed on the lower side of the slide door because the wire harness is led out from the lower side of the door trim to the vehicle body side.

Therefore, in view of the above points, even when the harness fixing portion on the vehicle body side is positioned higher than the harness outlet (lower opening) of the protector, the wire harness is attached to the end of the protector when the sliding door is opened and closed. A power supply apparatus for a vehicle sliding door has been developed that includes a power supply harness protector that can be bent smoothly with a large radius to prevent the wire harness from being damaged. This is a power supply harness protector that accommodates a wire harness while being bent and is led out from a slit-like opening, and a hook-shaped guide portion having a curved or inclined longitudinal section is formed along the opening. A harness guiding portion that is gradually curved or inclined in the height direction is formed at the end of the portion, and a harness lead-out port that continues to the opening is formed adjacent to the harness guiding portion (Patent Document) 1).
JP 2003-335188 A (page 4, FIG. 1)

  In the conventional example described in Patent Document 1, when the power supply harness protector is attached to the slide door and the wire harness is routed from the slit-shaped opening of the power supply harness protector to the vehicle body side, The wire harness swings along the saddle-shaped guide portion, and ascends smoothly along the harness guide portion at the end of the slit-shaped opening. As a result, when the harness fixing part on the vehicle body side is higher than the slit-shaped opening, the opening for harness guidance is positioned at the same height as the harness fixing part when the sliding door is fully closed, for example. The wire harness is not bent in a U-turn shape with a small diameter in the height direction, and an excessive bending force does not act on the wire harness. Further, when the sliding door is opened from the fully closed position, the wire harness is picked up by the harness guiding portion and smoothly guided to the hook-shaped guide portion without being caught. The hook-shaped guide part bends or inclines the wire harness led out from the slit-shaped opening and smoothly bends in the height direction. Since the sliding door is largely separated from the vehicle body to the outside when fully opened, the bending radius of the wire harness along the saddle-shaped guide portion increases, and an excessive bending force does not act on the wire harness.

  In the above conventional example, it is necessary to form a hook-shaped guide part and a harness guiding part in the slit-shaped opening, and the both ends of the wire harness are located far from both sides of the protector when the slide door is fully closed. When fully opened by sliding, the fixed end of the wire harness on the vehicle body side moves relative to the full length of the protector (the amount of movement is large). During this time, the wire harness in the protector is free even if it is not a small diameter. There still remains a possibility that an excessive bending force acts on the wire harness when it is bent and freely bent in the protector.

  SUMMARY OF THE INVENTION Accordingly, the present invention provides a power supply device for a vehicle slide door that further simplifies the structure and prevents an unreasonable bending force from acting on the wire harness reliably by expansion and contraction of the wire harness accompanying sliding of the slide door. With the goal.

  In order to achieve the above-described object, the present invention accommodates a wire harness in a U-shaped folded state, and a power supply harness protector in which both ends of the wire harness are drawn out from two openings on one end side is provided on the slide door side. A power supply device for a slide door for a vehicle provided in the above, wherein one end side of the wire harness that is fixed to the vehicle body side when the wire harness in the power supply harness protector is inserted through a coil spring and opens the slide door is for power supply The coil spring is pulled out from inside the harness protector to compress the coil spring. When the sliding door is closed, the compressed coil spring tries to return to its original state by the spring force, and the pulled out wire harness is inside the power supply harness protector. It is comprised so that it may return to.

  According to the present invention, a vehicular slide provided with a power supply harness protector on the slide door side, which accommodates the wire harness in a U-shaped folded state and has both ends of the wire harness drawn out from two openings on one end side. A power supply device for a door, wherein the wire harness in the power supply harness protector is inserted into the coil spring and one end of the wire harness fixed to the vehicle body side when the sliding door is opened is pulled out from the power supply harness protector. The coil spring is configured to be compressed, and the coil spring compressed when the slide door is closed tries to return to its original state by the spring force, and the drawn wire harness is returned to the power supply harness protector. As a result, the structure of the power supply harness protector is extremely simple, and Compact and cost also becomes possible, also eliminates the excessive bending force to the wire harness by the coil spring acts. When the door is closed after it is opened, the coil spring wound around the outside of the wire harness acts to extend from the compressed state against the spring force, and the wire harness is reliably and smoothly returned into the protector. be able to. Further, the structure of a coil spring wound around a box-shaped protector and a wire harness inside the box-shaped protector has few failures and is easy to maintain. Furthermore, since the wire harness is folded in a U shape, the size of the protector can be almost half of the required length of the wire harness, and the storage space can be reduced.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a simplified perspective view of the power supply harness protector 2 including a main body 2A and a cover 2B, and is molded from a plastic material. The main body 2 </ b> A is fixed to the door panel 3. Openings 4 and 5 are formed vertically on one end side (vehicle rear side) of the protector 2, and both ends of the wire harness 6 folded in a U shape in the protector 2 are drawn out from the openings 4 and 5. The wire harness 6 drawn out from the opening 4 is routed inside the door panel 3 of the slide door 1. The wire harness 6 pulled out from the opening 5 is fixed to the step portion 9 of the vehicle body 8 by a fixing tool 7, routed in the vehicle body 8, and connected to a battery (illustrated). The slide door 1 is provided with a slider 10, and the slider 10 guides the door 1 in the opening / closing direction along a guide rail (not shown) on the vehicle body 8 side.

  As shown in FIG. 2, the inside of the power supply harness protector 2 is a bottom portion 2 </ b> C in which the side opposite to the openings 4 and 5 is formed in a U shape. The U-shape is a circular arc having a relatively large diameter that does not damage the wire harness 6 due to repeated bending. The wire harness 6 housed inside the power supply harness protector 2 is inserted through the coil spring 11. That is, the coil spring 11 is wound around the outside of the wire harness 6. In the state shown in FIG. 2, the coil spring 11 is not applied with a spring force or is applied with a spring force in a direction in which the coil spring 11 tends to extend slightly. The opening 4 side of the coil spring 11 is fixed to the power supply harness protector 2. Similarly, the wire harness 6 on the opening 4 side is also fixed to the protector 2. The opposite coil spring may also be fixed to the protector 2. Connectors 12 and 13 are provided at both ends of the wire harness 6, respectively. The connector 12 is connected to a wire harness (not shown) routed inside the door panel 3 of the slide door 1. The connector 13 is connected to a wire harness (not shown) routed inside the vehicle body 8. The state shown in FIG. 2 is a state in which the slide door 1 is closed.

FIG. 3 is a view for explaining the relationship between the coil spring 11 and the wire harness 6 in a state in which the slide door 1 is opened. When the slide door 1 slides in the direction of the arrow in FIG. 3, the power supply harness protector 2 also slides with the slide door 1, and the wire harness 6 on the connector 13 side to be fixed is pulled out from the power supply harness protector 2. At this time, the coil spring 11 is in a compressed state. When the slide door 1 is closed from the fully opened state shown in FIG. 3, the compressed coil spring 11 tries to return to its original state by the spring force, and the drawn wire harness 6 is put into the power supply harness protector 2. Acts to return. By changing the design of the width and height of the power supply harness protector 2 as needed, the size and spring force of the coil spring 11 can be freely selected. Since the bottom portion 2C is formed in a U-shape, the wire harness 6 is bent into a U-shape having a relatively large diameter inside the protector 2, and thus the length of the protector 2 is determined by the calculated wire. The amount of expansion and contraction of the harness 6 is almost half, which helps to reduce the storage space.

1 is a simplified perspective view showing a preferred embodiment of the present invention. Sectional drawing which shows the internal structure of the harness protector for electric power feeding. The figure explaining the relationship between a protector, a coil spring, and a wire harness in the fully open state of a slide door.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sliding door 2 Power supply harness protector 3 Door panel 4,5 Opening 6 Wire harness 8 Vehicle body 11 Coil spring

Claims (3)

A power supply device for a sliding door for a vehicle that accommodates a wire harness in a U-shaped state and includes a power supply harness protector on both sides of the wire harness that is pulled out from two openings on one end side. And
The wire harness in the power supply harness protector is inserted into the coil spring, and one end side of the wire harness fixed to the vehicle body side when the sliding door is opened is pulled out from the power supply harness protector to compress the coil spring. And
A vehicular slide characterized in that the coil spring compressed when the slide door is closed tries to return to its original state by the spring force, and the drawn wire harness is returned into the power supply harness protector. Door power feeder.   2. The power supply device for a vehicle sliding door according to claim 1, wherein an inner space opposite to the opening of the power supply harness protector is formed in a U-shaped bottom portion.   The power supply device for a vehicle sliding door according to claim 1 or 2, wherein a side of the wire harness that is routed to the sliding door is fixed at an opening of the power supply harness protector.

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