JP4036063B2 - Spool protector for wire harness - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a spool protector for a wire harness, and more particularly, to a protector that accommodates a wire harness that is routed from a vehicle body side to a door such as a back door so that the wire harness can be wound and pulled out according to the opening and closing of the door.
[0002]
[Prior art]
Conventionally, a door that can be freely opened and closed on a car body of an automobile, for example, a back door in a trunk room, needs to be expanded and contracted by following the opening and closing of the wire harness routed from the car body to the door. As described above, there are many cases where the belt 1 is bridged between the vehicle body 1 and the back door 2 through a wire harness having an extra length in the bellows-shaped grommet G.
In some cases, a part of the wire harness W / H is fixed and hung on a hinge between the vehicle body and the back door.
[0003]
[Problems to be solved by the invention]
However, when the bellows-like grommet G of FIG. 6 is used, the grommet G is easily bent and buckled by the opening / closing operation of the back door 2, and when such buckling occurs repeatedly, the electric wire is generated in the buckled grommet G. There is a problem in that concentrated stress is generated and breakage is likely to occur.
In addition, when a part of the wire harness W / H is fixed to the hinge, the wire harness W / H having a surplus length hangs down, so that it may be caught on a load or between the door and the vehicle body. In addition, there is a risk of being bitten and damaged, and the appearance is not preferable.
[0004]
The present invention has been made in view of the above problems, and provides a spool protector that accommodates a wire harness spanned from a vehicle body to a door such as a back door in a state in which the wire harness can be smoothly followed according to opening and closing of the door. Is an issue.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned 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 the opening and closing operation of the door,
The spool protector is made of a resin molded product, and a plurality of guide grooves provided in a radial direction with a circumferential interval in the bottom wall portion inside a shallow circular main body case including a bottom wall portion and a peripheral wall portion. a plurality of rollers that are slidably held in a radial direction, and a spring for biasing the outer circumferential direction of each roller mounted between the respective rollers and the peripheral wall, a portion of the peripheral wall portion , And projecting the wire lead-in portion from the lower half of the peripheral wall portion and projecting the wire lead-out portion from the upper half in a cross shape with the wire lead-in portion,
The wire harness from the vehicle body side housing is pulled out to draw the inner portion of the body case by one round through between the roller and the peripheral wall portion are crossed to the door side of the wire lead-out portion through the wire pulling member ,
The roller is moved toward the center by the force with which the wire harness is pulled out when the door is opened, and the wire harness is reduced in diameter and pulled out. On the other hand, when the door is closed, the roller is moved outward by the biasing means. A spool protector for a wire harness is provided, which is configured to restore and expand the diameter of the wire harness by expanding it toward the peripheral wall side, and rewinding and accommodating the wire harness.
[0006]
In the above spool protector, the roller is slidably arranged in the radial direction, so that the roller moves toward the center of the spool protector when the door is opened, so the wire harness smoothly follows the door opening operation. The wire harness can be extended by being pulled out. On the other hand, when the door is closed, the roller returns to the original position by the urging means, and the wire harness is expanded to expand the diameter of the wire harness toward the peripheral wall, so that the drawn-out wire harness is smoothly rewound into the protector. be able to.
Therefore, it is possible to reliably protect the wire harness that has been bent and interferes with the external interference member and may be damaged.
Moreover, since the electric wire drawing part protrudes from a lower half of the peripheral wall part to a part of the peripheral wall part and the electric wire drawing part protrudes from the upper half in a cross shape with the electric wire drawing part, it is drawn from the electric wire drawing part. The wire harness and the wire harness that is drawn into the electric wire lead-in portion are not interfered and slid at the cross position, and the wire harness can be pulled out smoothly and damage to the wire harness can be prevented.
[0007]
Each roller is made of resin, and the lower end portion of the main shaft inserted through the central through hole is slidably fitted into a guide groove formed in the bottom wall portion in a radial direction. An annular rubber spring is passed through, and the annular rubber spring is wound and locked on a mounting rod protruding from the inner surface of the peripheral wall, and the roller is urged in the outer circumferential direction by the annular rubber spring.
[0008]
With the above configuration, when the door is opened, the annular rubber spring extends and the roller moves toward the center of the spool protector, so that the wire harness can be drawn smoothly and the wire harness can be extended. On the other hand, when the door is closed, the roller is pulled toward the outer periphery by the urging force of the annular rubber spring to return to the original position and push the wire harness toward the peripheral wall to expand the diameter. Can be smoothly rewound into the protector.
Further, it is possible to reduce the manufacturing cost since the said annular rubber spring is formed by rubber. Further, the roller may be formed of resin. In this case, the manufacturing cost can be further reduced as compared with the case where a metal member is used, and the moving member is moved when the wire harness is pulled out / rewinded. Generation of abnormal noise can be suppressed.
[0009]
It is preferable that three or four rollers are arranged in the main body case with a certain angular interval in the circumferential direction.
By arranging three rollers at intervals of 120 degrees or four at intervals of 90 degrees, it is possible to obtain a biasing force sufficient to pull back the wire harness when the door is closed. Further, if the number of rollers is increased, the urging force can be increased correspondingly. However, if five or more rollers are arranged, the cost increases and the number of steps for manufacturing the spool protector increases. preferable.
[0010]
After the wire harness is housed inside the main body case, a lid having the same outer shape as the main body case is covered and locked.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows the mounting position of the spool protector 10 of the present invention. The spool protector 10 is fixed to the vehicle body 1 side, and the wire harness W / H pulled out from the spool protector 10 is bridged to the back door 2 of the trunk room. ing.
[0012]
The spool protector 10 includes a main body case 11 and a lid 19 which are integrally formed of synthetic resin shown in FIG.
The main body case 11 includes a circular bottom wall portion 15 and a peripheral wall portion 14, and four guide grooves 15 a are provided in the bottom wall portion 15 in the radial direction, with a 90 ° interval in the circumferential direction. It is provided radially. An L-shaped mounting rod 14a is projected from the inner surface of the peripheral wall 14 near the outer end of the guide groove 15a.
[0013]
The roller 12 made of synthetic resin has a central through hole 12a formed on the central axis, and a lower end portion 12b-1 of the main shaft 12b inserted through the central through hole 12a is protruded from the bottom surface of the roller. It is slidably fitted in a guide groove 15a provided in a recess in the bottom wall portion 15.
[0014]
The annular rubber spring 20 shown in FIG. 3 is provided with stop portions 20b having through holes 20a at both ends. The annular rubber spring 20 is passed through the central through hole 12a of the roller 12, the through hole 20a of the stopper 20b is passed through the mounting rod 14a, and the roller 12 is urged in the outer circumferential direction. Further, after attaching the annular rubber spring 20 to the attachment rod 14a, the cap 21 is put on the tip of the attachment rod 14a to prevent the annular rubber spring 20 from coming off.
[0015]
On one side of the main body case 11, a hook-shaped wire lead-in portion 16 that protrudes toward the vehicle body 1 and a hook-shaped wire lead-out portion 17 that protrudes toward the back door 2 are provided.
The wire lead-in portion 16 protrudes from the lower half of the peripheral wall portion 14 and the other wire lead-out portion 17 protrudes from the upper half of the peripheral wall portion 14 and communicates with the space S, respectively. In this way, the wire lead-in portion 16 and the wire lead-out portion 17 are projected in a cross shape on one side of the main body case 11.
[0016]
The lid 19 that covers the main body case 11 has a shape similar to the outer shape of the main body case 11, and after the wire harness W / H is accommodated in the main body 11, the cover 19 is covered and locked together.
[0017]
FIG. 4 is a view showing an internal state in which the wire harness W / H is accommodated in the spool protector 10. The wire harness W / H is drawn into the space S through the wire lead-in part 16, and the outer surface and the peripheral wall of each roller 12. The wire is wound around the inner surface of the portion 14 in a circumferential manner, and is drawn out to the back door 2 side through the wire lead-out portion 17.
[0018]
When the back door 2 is opened, the wire harness W / H accommodated in the spool protector 10 is connected to the back door 2 side, as shown in FIG. The wire harness W / H drawn out and wound circumferentially inside the spool protector 10 has a reduced diameter, and the roller 12 moves toward the center in accordance with the reduced diameter of the wire harness W / H. The wire harness W / H follows the opening operation of the back door 2.
[0019]
On the contrary, when the back door 2 is closed, the pulling force to the wire harness W / H to the back door 2 side disappears, and the roller 12 is pulled and moved in the outer peripheral direction by the restoring force of the annular rubber spring 20 itself. The wire harness W / H wound in a circumferential shape is expanded in diameter and returned to the state shown in FIG. 4, and the excess portion of the wire harness W / H drawn out is rewound from the wire lead-out portion 17 to the inside. Being absorbed.
[0020]
As described above, when the spool protector 10 of the present invention is used, the wire harness W / H is automatically pulled out / rewinded without hanging down in the trunk room, so that the wire harness W / H is pulled on a load or the like. It can be prevented from being damaged by being hung or broken, and the appearance is also improved.
Further, it is possible to reduce the manufacturing cost since the said annular rubber spring 20 is formed by rubber. Further, since the roller is formed of resin, the manufacturing cost can be further reduced as compared with the case where a metal member is used, and abnormal noise due to movement of the movable member when the wire harness is pulled out / rewinded can be reduced. Occurrence can be suppressed.
[0021]
In the present embodiment, four rollers are provided. However, the number of rollers is not limited to four, and may be three at intervals of 120 degrees.
Although this embodiment is applied to a wire harness routed between a vehicle body and a back door formed of a trunk room lid, the back door that opens and closes the entire rear portion of the vehicle body, and further, between the vehicle body and the side door. It can also be applied to wire harnesses routed in
[0022]
【The invention's effect】
As is clear from the above description, according to the present invention, the wire harness that is routed between the vehicle body and the door and needs to be expanded and contracted according to the opening / closing operation of the door is accommodated in the circular spool protector. In addition, since the roller is slidably disposed in the spool protector in the radial direction, when the wire harness is wound and accommodated between the roller and the peripheral wall portion, the roller moves toward the center when the door is opened. When the door is closed, the annular rubber spring is restored and the roller is pulled outward to push the wire harness toward the peripheral wall and expand the diameter. Therefore, the wire harness can be smoothly rewound and accommodated inside the protector.
[0023]
Further, since the wire harness does not hang down in the trunk room or the like and is always accommodated in the spool protector, the wire harness W / H does not interfere with the external interference member and be damaged.
Further, since the annular rubber spring is formed of rubber instead of a spring, the manufacturing cost can be reduced. Furthermore, the movable member may be molded from resin. In this case, the manufacturing cost can be further reduced as compared with the case of using a metal member, and the movable member can be moved when the wire harness is pulled out / rewinded. It is possible to suppress the generation of abnormal noise.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an application example of a wire harness spool protector of the present invention.
FIG. 2A is a perspective view showing a main body case of a spool protector, and FIG. 2B is a perspective view showing a lid.
3A is a perspective view showing an annular rubber spring, and FIG. 3B is a cross-sectional view showing a state in which the annular rubber spring is attached to a main body case.
FIG. 4 is a perspective view showing a state in which a wire harness is accommodated in the main body case.
FIG. 5 is a perspective view showing a state in which the wire harness is pulled out when the door is opened.
FIG. 6 is a schematic view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Spool protector 11 Main body case 12 Roller 14 Perimeter wall part 15 Bottom wall part 16 Electric wire drawing part 17 Electric wire drawing part 20 Annular rubber spring W / H Wire harness

Claims (3)

A spool protector for a wire harness that accommodates a wire harness routed between a vehicle body and a door and expands and contracts according to the opening and closing operation of the door,
The spool protector is made of a resin molded product, and a plurality of guide grooves provided in a radial direction with a circumferential interval in the bottom wall portion inside a shallow circular main body case including a bottom wall portion and a peripheral wall portion. a plurality of rollers that are slidably held in a radial direction, and a spring for biasing the outer circumferential direction of each roller mounted between the respective rollers and the peripheral wall, a portion of the peripheral wall portion In addition, the wire lead-in portion protrudes from the lower half of the peripheral wall portion, and the wire lead-out portion protrudes from the upper half in a cross shape with the wire pull-in portion. And project the wire lead-out part,
The wire harness from the vehicle body side housing is pulled out to draw the inner portion of the body case by one round through between the roller and the peripheral wall portion are crossed to the door side of the wire lead-out portion through the wire pulling member ,
The roller is moved toward the center by the force with which the wire harness is pulled out when the door is opened, and the wire harness is reduced in diameter and pulled out. On the other hand, when the door is closed, the roller is moved outward by the biasing means. A spool protector for a wire harness, characterized in that the wire harness is restored and expanded toward the peripheral wall side to expand the diameter, and the wire harness can be rewound and accommodated. With the rollers is made of resin, thereby slidably fitted the lower end of the main shaft is inserted into the central through hole in the guide groove which is recessed radially above the bottom wall, the said central through-hole 2. The wire harness according to claim 1, wherein the spring made of an annular rubber spring is passed, the annular rubber spring is wound and locked on a mounting rod protruding from the inner surface of the peripheral wall, and the roller is urged in the outer circumferential direction by the annular rubber spring. Spool protector.   The spool protector for a wire harness according to claim 1 or 2, wherein the number of the rollers is three or four at a predetermined angular interval in the circumferential direction.

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