JP2004106606A - Spool protector for wire harness - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To rout a wire harness to be routed between a vehicle body and a door on the indoor side of a weather strip. <P>SOLUTION: This spool protector stores the wire harness to be routed between the vehicle body and the door and extends and contacts the wire harness according to an opening/closing operation of the door. The protector is provided with a case with a square shallow bottom. An electric wire lead-in part and an electric wire lead-out part are provided at diagonal positions of the case. A spring receiving pin is projectingly provided along an opposite peripheral wall from the electric wire lead-out part. A guide groove is provided at a bottom wall from the vicinity of the spring receiving pin to the electric wire lead-out part. A lower end of a movable winding pin is slidably fitted to the guide groove. An annular rubber spring is stretched between the movable winding pin and the spring receiving pin. A fixed winding pin is projectingly provided from the bottom wall in the vicinity of the peripheral wall facing to the electric wire lead-in part. The wire harness is wound on the movable winding pin, is drawn from the electric lead-out part and is stored in a Z-shape within the case after inserting the wire harness from the electric lead-in part and winding the wire harness on the fixed winding pin. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a spool protector for a wire harness, and more particularly, to arranging a wire harness inside a weather strip so as to facilitate a wiring operation and simplify waterproofing measures.
[0002]
[Prior art]
A door hinge is connected to the vehicle body side from the door side at a door hinge portion that connects the vehicle body side and the door side of the automobile to be opened and closed, and an instrument panel harness (hereinafter abbreviated as an instrument panel harness) is provided on the vehicle body side. Or, the instrument panel harness is routed from the vehicle body to the door, and the door is connected to the door harness. Conventionally, the wire harness routed to the door hinge portion is routed at a position substantially the same as the position of the door hinge portion, with a change in the vertical direction, and only twisting occurs in the wire harness with opening and closing of the door. The wire harness does not need to expand and contract, and the twist is absorbed by the wire harness being twisted.
[0003]
When the wire harness is routed at the hinge fulcrum position as described above, the hinges H of the vehicle body side C and the door D are attached to substantially the center of the end surface 1a of the door frame 1 as shown in FIG. The harness W / H needs to pass through the inside of the door frame 1 and be taken out of the door from the through hole 1b provided in the end surface 1a, and work of routing the wire harness into the inside of the door frame 1 and passing through the through hole 1b. There was a problem that took time and effort.
[0004]
In addition, a weather strip 2 is attached to the door D for waterproofing. Since the door hinge H is mounted on the outdoor side of the weather strip 2, the wire harness W / H is also on the outdoor side of the weather strip 2. Therefore, the wire harness W / H is not waterproofed by the weather strip 2, and thus needs to have a waterproof structure. Therefore, conventionally, it has been necessary to attach the waterproof grommet G to the penetrating position on the door side and the vehicle body side, and also to provide waterproofing measures to the wire harness W / H.
[0005]
The above-mentioned problem can be solved by disposing the wire harness W / H closer to the indoor side than the weather strip 2, but in this case, the fulcrum position of the door hinge H and the wiring position of the wire harness W / H are shifted. In addition, it is necessary to expand and contract the wire harness as the door is opened and closed. That is, the wire harness routed to the door hinge part is required to have both the function of expanding and contracting and the function of absorbing torsion.
[0006]
A structure in which a wire harness is arranged on the indoor side of the weather strip 2 is proposed in Japanese Patent Laid-Open No. 8-48146. That is, as shown in FIGS. 7 and 8, a bellows-shaped duct 4 for covering the air conditioning duct is attached between the side cover 3 of the instrument panel and the inner surface of the door facing the same, and a wire harness is provided inside the duct 4. The W / H is spirally wound and arranged with a sufficient length.
[0007]
[Problems to be solved by the invention]
However, in the above structure, since the bellows-like wire harness W / H is routed inside the bellows-like duct 4, the following problems occur.
{Circle around (1)} When the wire harness W / H passes through the center position inside the bellows-like duct, both the bellows-like duct 4 and the bellows-like wire harness W / H can expand and contract in a normal state. However, when a part of the wire harness W / H enters the concave portion 4a of the bellows portion of the duct 4, the duct 4 cannot be contracted. When the door D is closed in this state, an excessive force may be applied to the duct 4 and the wire harness W / H between the door frame 1 and the side cover 3.
[0008]
{Circle around (2)} When the bellows-like wire harness W / H expands and contracts, it does not always restore to a constant shape. If the outside diameter of the wire harness becomes larger than the inside diameter of the bellows-like duct 4, the bellows-like duct becomes Destroyed and unable to shrink.
[0009]
{Circle over (3)} Since the bellows-shaped duct 4 is exposed to the indoor side, there is a possibility that the bellows-shaped duct 4 is deformed by an external force. The problem of ▼ is easy to occur.
[0010]
(4) When opening and closing the door, in addition to the force for opening and closing the door, an operating force for expanding and contracting the bellows-shaped duct 4 is required, and the occupant may feel that opening and closing the door is heavy.
[0011]
The present invention solves the above-mentioned disadvantages, and arranges a wiring harness so as to expand and contract without being twisted at a position indoors from a fulcrum position of a door hinge and at a position inside a weather strip, thereby facilitating wiring work and waterproofing measures. It is an object to simplify the above.
[0012]
[Means for Solving the Problems]
In order to solve the above problems, the present invention is a wire harness spool protector that accommodates a wire harness routed between a vehicle body and a door, and expands and contracts according to opening and closing operations of the door,
A rectangular shallow bottom case, an electric wire lead-in portion and an electric wire lead-out portion are provided at diagonal positions of the case, and a spring receiving pin is projected from the electric wire lead-out portion along a peripheral wall facing the electric wire lead-out portion; A guide groove is provided in the bottom wall from the vicinity of the pin to the wire lead-out portion, the lower end of the movable winding pin is slidably fitted in the guide groove, and an annular ring is provided between the movable winding pin and the spring receiving pin. A rubber spring is stretched, and a fixed winding pin is protruded from the bottom wall in the vicinity of the peripheral wall facing the wire lead-in portion,
After inserting a wire harness from the door side from the wire lead-in portion and winding it around the fixed winding pin, it is wound around a movable winding pin, pulled out from the vehicle body side from the wire lead-out portion and housed in the case in a Z-shape,
The movable winding pin is moved against the urging force of the annular rubber spring to pull out the wire harness by the force with which the wire harness is pulled out when the door is opened, and the wire is moved and restored by the ring rubber spring when the door is closed. There is provided a wire harness spool protector characterized in that the harness is configured to be rewound and accommodated in a case.
[0013]
In the above spool protector, the movable winding pin is provided in the case and the wire harness is detoured in the case, so that when the door is opened, the force with which the wire harness is pulled out overcomes the biasing force of the annular rubber spring, By moving the movable winding pin by this force and reducing the detour distance of the wire harness, the wire harness can be pulled out smoothly and the wire harness can be extended, while at the time of door closing operation, it can be moved by the biasing force of the annular rubber spring Since the winding pin returns to the original position to increase the detour distance of the wire harness, the drawn wire harness can be smoothly rewound into the inside of the protector.
[0014]
Further, since the annular rubber spring is formed of rubber instead of a spring, manufacturing costs can be reduced. Further, the movable winding pin may be formed of a resin. In this case, the manufacturing cost can be further reduced as compared with the case where a metal member is used, and the movable winding can be performed when the wire harness is pulled out / rewinded. Generation of abnormal noise due to movement of the attached pin can be suppressed.
[0015]
The movable winding pin is provided with a plurality of large-diameter portions projecting from the large-diameter portion at intervals in the axial direction, and a space between the large-diameter portions is fitted to the guide groove, an annular rubber spring winding portion, a wire harness winding portion. It is divided into.
More specifically, the movable winding pin has four large-diameter portions projecting at required intervals, and a first large-diameter portion provided at an end of the movable winding pin and the first large-diameter portion. A portion between the second large-diameter portion and the second large-diameter portion provided at a required distance from the portion is a slide portion that is slidably fitted in the guide groove, and a required portion is formed between the second large-diameter portion and the second large-diameter portion. A spring engaging portion for winding the annular rubber spring is provided between the third large-diameter portion and the fourth large-diameter portion provided at an interval, and a fourth locking portion is provided at a required interval from the third large-diameter portion and the third large-diameter portion. An electric wire wrapping portion is formed between the large diameter portion and the electric wire to be wound and folded back, and an end of the fourth large diameter portion is a spring engagement portion.
[0016]
Since the movable winding pin has a simple structure as described above, it can be provided at low cost. In addition, since the spring locking portions are provided on both sides of the wire winding portion and the annular rubber spring is wound, the movable winding pin can be moved in a stable state.
[0017]
On the inner plate of the door frame, the case is fitted and mounted in the spool mounting recess formed to extend to the vehicle body facing surface, and the grommet is attached to the external wire harness from the wire drawing section, and the door frame is mounted on the body facing the vehicle body. A wire harness on which the grommet is mounted is hung over the vehicle body at a position on the indoor side of the weather strip attached to the surface.
[0018]
According to the above configuration, it is not necessary to pull out the wire harness from the inside of the door frame to the outside through the through hole and to bridge the wire harness to the vehicle body, thereby reducing the number of work steps. In addition, since the spool protector is disposed inside the weather strip, it is not necessary to perform a waterproof process, and it is possible to further reduce man-hours and cost.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings. 1 to 5 show an embodiment of the present invention.
FIG. 1 shows a mounting position of a spool protector 10 according to the present invention. A case 11 is mounted on an inner plate of a door frame 1 by fitting the case 11 into a spool mounting recessed portion 5 formed to extend to a vehicle facing surface. The grommet G is attached to the external wire harness W / H from the wire draw-in portion, and the wire harness with the grommet G is attached to the vehicle body C at a position indoors from the weather strip 2 attached to the vehicle body facing surface of the door frame 1. And over it.
[0020]
The spool protector 10 includes a case 11 and a lid 19 formed of a synthetic resin shown in FIG.
The case 11 includes a bottom wall 15 and a peripheral wall 14 erected from the periphery of the bottom wall 15. The bottom wall 15 extends at a diagonal position of the case 11 to provide a wire lead-in portion 16 and a wire lead-out portion 17. I have. A fixed winding pin 15a protrudes from the bottom wall 15 in the vicinity of the peripheral wall 14 facing the wire lead-in portion 16, and a spring receiving pin 15b projects from the bottom wall 15 along the peripheral wall 14 facing the wire lead-out portion 17. Has been established. Further, a linear through hole is provided from the vicinity of the spring receiving pin 15b to the vicinity of the wire lead-out portion 17 to form a guide groove 15c, and the hole width at the end of the guide groove 15c on the wire lead-out portion 17 side is increased. As the movable winding pin mounting portion 15d.
[0021]
The lid 19 is composed of an upper wall portion 19a and a peripheral wall 19b having substantially the same shape as the bottom wall 15 of the case 11, and covers the case 11 after the wire harness W / H is housed in the case 11, so as to be locked and connected thereto.
[0022]
The movable winding pin 20 formed of a rod-like body shown in FIG. 3 has large-diameter portions 20a to 20d protruding in the outer peripheral direction at required intervals. A sliding portion 20e extends between a square large-diameter portion 20a provided at an end of the movable winding pin 20 and a square large-diameter portion 20b provided at a predetermined interval from the large diameter portion 20a. A spring engaging portion 20f is provided between the portion 20b and a circular large-diameter portion 20c provided at a required interval from the large-diameter portion 20b, and a required interval is provided between the large-diameter portion 20c and the large-diameter portion 20c. An electric wire wrapping portion 20g is provided between the large diameter portion 20d and the circular large diameter portion 20d, and an end portion of the large diameter portion 20d is defined as a spring locking portion 20h.
[0023]
The movable winding pin 20 is fitted into the movable winding pin mounting portion 15d provided in the case 11, and the slide portion 20e of the movable winding pin 20 is slidably fitted in the guide groove 15c. Further, an annular rubber spring 30 is wound around the spring locking portions 20f and 20h of the movable winding pin 20 and the spring receiving pin 15b, and the movable winding pin 20 is urged toward the spring receiving pin 15b.
[0024]
FIG. 4 is a view showing an internal state in which the wire harness W / H is housed inside the spool protector 10. The wire harness W / H is drawn into the spool protector 10 through the electric wire draw-in portion 16, and is fixed to the fixed winding pin 15a. It is wound around and folded back, and further, is wound around the wire winding portion 20g of the movable winding pin 20 through the space between the movable winding pin 20 and the spring receiving pin 15b, and is drawn back to the vehicle body C through the wire drawing portion 17. . Further, the wire harness W / H is wound and fixed with a tape T in the wire lead-in portion 16, and a grommet G is provided on the wire harness W / H that is pulled out from the wire lead-out portion 17 and routed to the vehicle body C side. The end of the grommet G on the vehicle body C side is attached to and fixed to a through hole provided in the vehicle body C.
[0025]
When the side door D is opened, the wire harness W / H connected to the vehicle body C is moved from the wire drawer 17 to the wire harness W / H housed in the spool protector 10 as shown in FIG. When the wire harness W / H is drawn out and detours in the spool protector 10, the detour distance is shortened, and the pulling of the wire harness W / H causes the movable winding pin 20 to move toward the wire lead-out portion 17, and The harness W / H is made to follow the opening operation of the side door D.
[0026]
Conversely, when the side door D is closed, the pulling force of the wire harness W / H toward the vehicle body C is lost, and the movable winding pin 20 is pulled back to the original position by the restoring force of the annular rubber spring 30, and the force is used. The detour distance of the wire harness W / H increases, and the wire harness W / H is returned to the state shown in FIG. 4. The extra portion of the wire harness W / H drawn out is rewound inward from the wire drawing portion 17 and absorbed.
[0027]
As described above, since the wire harness W / H has a telescopic function, the spool protector 10 can be disposed inside the weather strip 2 of the side door D. There is no need to perform an operation of drawing out from the inside of the frame to the outside through the through hole and bridging the frame to the vehicle body C side, thereby reducing the number of work steps. In addition, since the spool protector 10 can be disposed inside the weather strip 2, there is no need to perform a water stopping process, and the number of working steps can be further reduced and the cost can be reduced.
[0028]
Further, since the annular rubber spring is formed of rubber instead of a spring, manufacturing costs can be reduced. Further, since the movable winding pin is formed of resin, the manufacturing cost can be further reduced as compared with the case where a metal member is used, and the movable winding pin can be removed when the wire harness is pulled out / rewinded. Generation of abnormal noise due to movement can be suppressed.
[0029]
【The invention's effect】
As is apparent from the above description, according to the present invention, the wire harness which is routed between the vehicle body and the door and needs to be expanded and contracted according to the opening and closing operation of the door to be accommodated in the spool protector, Since the movable winding pin is slidably mounted inside the spool protector, if the wire harness is bypassed and wound around the movable winding pin to be housed, the movable winding pin is pulled out of the wire drawer when the door is opened. Side, and the wire harness detour distance is reduced, so that it can be pulled out smoothly. On the other hand, when the door is closed, the movable winding pin returns to the original position due to the restoring force of the annular rubber spring, and the bypass distance of the wire harness is increased, so that the wire harness can be smoothly rewound and stored inside the protector. .
[0030]
As described above, since the wire harness has a telescopic function, the wire harness can be routed on the inner plate of the door frame, and the wire harness is routed inside the door frame, which was conventionally required, and provided on the front end surface of the door frame. The work of taking out the wire harness from the through hole can be eliminated, and the work of wiring the wire harness to the door frame can be facilitated. Further, since the wire harness is routed at an inner position from the weather strip, it is not necessary to take waterproofing measures on the wire harness, which can reduce the manufacturing cost.
[0031]
Further, since the annular rubber spring is formed of rubber instead of a spring, manufacturing costs can be reduced. Further, the movable winding pin may be formed of a resin. In this case, the manufacturing cost can be further reduced as compared with the case where a metal member is used, and the movable winding can be performed when the wire harness is pulled out / rewinded. Generation of abnormal noise due to movement of the attached pin can be suppressed.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an application example of a spool protector for a wire harness of the present invention.
FIG. 2A is a perspective view showing a case of a spool protector, and FIG. 2B is a perspective view showing a lid.
FIG. 3A is a perspective view of a movable winding pin, and FIG. 3B is a front view of the movable winding pin.
FIG. 4 is a perspective view showing a state where a wire harness is housed in the case.
FIG. 5 is a perspective view showing a state where the wire harness is pulled out when the door is opened.
FIG. 6 is an exploded perspective view of a conventional door hinge portion.
FIG. 7 is a perspective view showing another conventional example.
FIG. 8 is an enlarged sectional view of a main part of the conventional example of FIG. 7;
[Explanation of symbols]
2 Weather strip 10 Spool protector 11 Case 14 Peripheral wall 15 Bottom wall 15a Fixed winding pin 15b Spring receiving pin 15c Guide groove 16 Electric wire draw-in part 17 Electric wire draw-out part 19 Lid 20 Movable winding pin 20a to 20d Large diameter part 20e Slide part 20f , 20h Spring locking part 20g Electric wire winding part 30 Annular rubber spring W / H Wire harness

Claims (3)

A wire harness spool protector that accommodates a wire harness arranged between a vehicle body and a door and expands and contracts according to opening and closing operations of the door,
A rectangular shallow bottom case, an electric wire lead-in portion and an electric wire lead-out portion are provided at diagonal positions of the case, and a spring receiving pin is projected from the electric wire lead-out portion along a peripheral wall facing the electric wire lead-out portion; A guide groove is provided in the bottom wall from the vicinity of the pin to the wire lead-out portion, the lower end of the movable winding pin is slidably fitted in the guide groove, and an annular ring is provided between the movable winding pin and the spring receiving pin. A rubber spring is stretched, and a fixed winding pin is protruded from the bottom wall in the vicinity of the peripheral wall facing the wire lead-in portion,
After inserting a wire harness from the door side from the wire lead-in portion and winding it around the fixed winding pin, it is wound around a movable winding pin, pulled out from the vehicle body side from the wire lead-out portion and housed in the case in a Z-shape,
The movable winding pin is moved against the urging force of the annular rubber spring to pull out the wire harness by the force with which the wire harness is pulled out when the door is opened, and the wire is moved and restored by the ring rubber spring when the door is closed. A spool protector for a wire harness, wherein the harness is configured to be rewound into the case and housed therein. The movable winding pin is provided with a plurality of large-diameter portions projecting from the large-diameter portion at intervals in the axial direction, and a space between the large-diameter portions is fitted to the guide groove, an annular rubber spring winding portion, a wire harness winding portion. The spool protector for a wire harness according to claim 1, wherein the spool protector is divided into: On the inner plate of the door frame, the case is fitted and mounted in the spool mounting recess formed to extend to the vehicle body facing surface, and the grommet is attached to the external wire harness from the wire drawing section, and the door frame is mounted on the body facing the vehicle body. The spool protector for a wire harness according to claim 1 or 2, wherein the wire harness on which the grommet is mounted is bridged over the vehicle body at a position on the indoor side of the weather strip attached to the surface.

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