JP2004104948A - Spool protector for wire harness - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protector that elastically houses a wire harness routed between a car body and a door. <P>SOLUTION: A spring member comprising an arcuate part along the inner surface of a peripheral wall is integrally molded by protruding a bearing part from a bottom wall, inside a case body comprising the circular bottom wall and the peripheral wall. An electric wire drawing-in part and an electric wire drawing-out part are integrally protruded in a cross shape at a part of the peripheral wall. The wire harness is drawn in the case body from a car body side through the electric wire drawing-in part, and is wound between the spring member and the peripheral wall before crossed with a door side from the electric wire drawing-out part which is drawn out and housed. At opening the door, the spring member is flexed to reduce the diameter of wire harness for leading out, while, at closing the door, the spring member restores to press and spread the wire harness against the peripheral wall side for increased diameter, thereby allowing the wire harness to be re-wound for housing. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a wire harness spool protector, and more particularly, to a protector that accommodates a wire harness arranged from a vehicle body side of an automobile to a door such as a back door such that the wire harness can be wound up and pulled out according to opening and closing of the door.
[0002]
[Prior art]
Conventionally, a door that can be freely opened and closed on the body of an automobile, for example, a back door in a trunk room, requires a wire harness routed from the body to the door to expand and contract according to the opening and closing of the door. As described above, in many cases, the grommet G is bridged between the vehicle body 1 and the back door 2 through a wire harness having an extra length in the bellows-like grommet G.
In some cases, a part of the wire harness is fixed and hung from 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 shown in FIG. 10 is used, the grommet G is easily bent and buckled by the opening and closing operation of the back door 2. There is a problem in that concentrated stress is generated in the wire and disconnection is easily generated.
Further, if a structure is adopted in which a part of the wire harness W / H is fixed to the hinge, the wire harness W / H, which has an extra length, hangs down, so that the wire harness W / H may be caught by a load or the like, or the door 2 and the vehicle body 1 There is a risk of being damaged due to being jammed between them, and is not preferable in appearance.
[0004]
The present invention has been made in view of the above-described problems, and provides a spool protector that accommodates a wire harness that is bridged from a vehicle body to a door such as a back door in a state where the wire harness can smoothly follow the door as it is opened and closed. Is an issue.
[0005]
[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,
The spool protector is formed integrally with a spring piece having an arc portion along the inner surface of the peripheral wall portion by projecting a support shaft portion from the bottom wall portion inside a main body case having a circular bottom wall portion and a peripheral wall portion. At the same time, a wire drawing portion and a wire drawing portion are integrally formed to protrude in a cross shape on a part of the peripheral wall portion,
The wire harness is pulled into the main body case through the wire lead-in portion from the vehicle body side, wound between the spring piece and the peripheral wall portion, and crossed out from the wire lead-out portion to the door side, and pulled out,
When the door is opened, the spring piece is bent to reduce the diameter of the wire harness, and when the door is closed, the spring piece is restored and the wire harness is pushed to the peripheral wall side to expand and expand the wire harness. There is provided a spool protector for a wire harness, wherein the spool protector has a configuration capable of being rewound and accommodated.
[0006]
In the above-mentioned spool protector, the spring piece having the arc portion is provided in the main body case, so that when the door is opened, the spring piece is bent to reduce the diameter of the wire harness, so that the wire harness is smoothly pulled out and the wire harness is drawn out. While the door can be extended, when the door is closed, the spring piece returns to its original position and pushes the wire harness to the surrounding wall to expand the diameter, so that the drawn wire harness smoothly rewinds inside the protector. be able to. Therefore, it is possible to reliably protect the wire harness which has conventionally been warped and may be damaged by interference with the external interference material.
Further, in the present invention, in particular, since the spring piece is provided integrally with the main body case, and the spring material made of a separate member is not required, the number of mounting steps and the number of parts of the spring material can be reduced.
[0007]
It is preferable that the spring piece includes a pair of arc-shaped spring pieces each having the support shaft portion at one end, and the pair of spring pieces is arranged in a tube shape at opposing positions.
Alternatively, the spring piece is provided with a support shaft protruding from the bottom wall at the center of the arc, and is formed of one spring piece having a spring plate extending on both sides of the support shaft. A spring plate may be provided along the inner surface of the peripheral wall.
[0008]
It is preferable that the vicinity of the free ends of the tip ends of the pair of spring pieces or the spring plate portions on both sides is connected by an S-shaped auxiliary spring piece, and the auxiliary spring piece urges the opening direction.
The auxiliary spring piece is also formed integrally with the main body case using a slide mold.
By providing the auxiliary spring piece, the spring piece or the vicinity of the free end of the spring plate portion can be urged in the opening direction, and the wire harness can be quickly rewound into the protector when the door is closed.
[0009]
Further, the spring piece itself has an S-shape, a support shaft protruding from the bottom wall is provided at the center thereof, and a spring plate portion curved in the opposite direction extends on both sides of the support shaft. The spring plates may be formed as a single piece, and the spring plate portions on both sides may be along the inner surface of the peripheral wall portion.
The spring piece further includes a support shaft protruding from the bottom wall at one end of the arc, and the spring plate is formed as a single spring piece extending by bending the spring plate from the support shaft. May be arranged along the inner surface of the peripheral wall portion.
[0010]
The vicinity of the free end of the spring piece may be urged in the opening direction by a rubber band stretched between the spring piece and the main body case.
[0011]
A die hole for forming the spring piece is provided in a bottom wall of the main body case.
After a wire harness is housed inside the main body case, a lid having the same outer shape as that of the main body case is put on the main body case so as to be locked.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a mounting position of a spool protector 10 according to the present invention. The spool protector 10 is fixed to a vehicle body 1 side, and a wire harness W / H pulled out from the spool protector 10 is passed over a back door 2 of a trunk room. ing.
[0013]
The spool protector 10 includes a main body case 11 and a lid 19 integrally formed of a synthetic resin shown in FIG.
The main body case 11 includes a circular bottom wall portion 15 and a peripheral wall portion 14. A pair of substantially arc-shaped spring pieces 12 and 13 are opposed to an internal space S surrounded by the bottom wall portion 15 and the peripheral wall portion 14. Provided. The support shafts 12a, 13a at one ends of the spring pieces 12, 13 are erected from the bottom wall portion 15, and the portion of the bottom wall portion 15 opposed to the spring plate portions 12b, 13b curved in an arc shape is used to remove a molding die. The holes 15a and 15b are formed, and the spring pieces 12 and 13 swing with respect to the bottom wall portion 15. The free ends 12c and 13c at the distal ends of the spring plates 12b and 13b are formed in a rib shape bulging in a circular shape.
[0014]
The support shafts 12a and 13a of the pair of spring pieces 12 and 13 are located symmetrically with respect to the center of the bottom wall portion 15, and the free end portions 12c and 13c are also located symmetrically. Are arranged to form a tomography.
[0015]
A gutter-shaped wire lead-in portion 16 protruding toward the vehicle body 1 and a gutter-shaped wire drawing portion 17 protruding toward the back door 2 are provided on one side of the main body case 11.
The wire lead-in portion 16 projects from the lower half of the peripheral wall portion 14, and the other wire lead portion 17 projects from the upper half of the peripheral wall portion 14, and communicates with the space S, respectively. In this manner, the wire lead-in portion 16 and the wire lead-out portion 17 project in a cross shape to one side of the main body case 11.
[0016]
The synthetic resin for integrally molding the main body case 11 is not particularly limited as long as it has both rigidity and flexibility. For example, a polypropylene-based or nylon-based resin is preferable.
As shown in FIG. 2 (B), the cover 19ha to be put on the main body case 11 has a shape similar to that of the main body case 11, and is put on the main body case 11 after the wire harness W / H is housed in the main body case 11. And lock them together.
[0017]
FIG. 3 is a diagram 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 space S through the electric wire draw-in portion 16, and the outer surfaces of the spring pieces 12 and 13 are separated from each other. It is wound in a circumferential shape through the space between the inner wall of the peripheral wall portion 14 and pulled out toward the back door 2 through the electric wire drawing portion 17.
[0018]
When the back door 2 is opened, the wire harness W / H connected to the back door 2 is connected to the wire harness W / H accommodated in the spool protector 10 as shown in FIG. The wire harness W / H that is drawn out and wound around the inside of the spool protector 10 is reduced in diameter, and the spring pieces 12 and 13 are turned into the shaft portions 12a according to the reduced diameter of the wire harness W / H. The distal ends 12c and 13c are bent inward with the fixed shaft 13a serving as a fixed shaft, and the wire harness W / H follows the opening operation of the back door 2.
[0019]
Conversely, when the back door 2 is closed, the pulling force on the wire harness W / H to the back door 2 side is lost, and the spring pieces 12, 13 which have been bent to the reduced diameter state restore the spring pieces 12, 13 themselves. The wire harness W / H wound circumferentially by the force is expanded by the force, and the diameter is returned to the state shown in FIG. 3. The extra portion of the wire harness W / H drawn out is an electric wire. It is rewound inside from the drawer 17 and absorbed.
[0020]
That is, 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 may be caught on a load or the like. In addition, it is possible to prevent breakage due to disconnection, and the appearance is improved.
In addition, since the spring pieces 12 and 13 for drawing out and rewinding the wire harness W / H are integrally formed of synthetic resin together with the main body case 11, manufacturing costs can be reduced. In addition, by providing the punching holes 15a below the spring pieces 12 and 13, it is not necessary to use a slide die or the like, and the die cost can be reduced.
Further, since all of the spring pieces 12, 13 and the like are formed of a synthetic resin, there is a difference due to the movement of the spring pieces 12, 13 when the wire harness W / H is pulled out or wound, as compared with the case of using metal or the like. Generation of sound can be suppressed.
[0021]
The spring pieces 12, 13 can be made stronger when the shaft portions 12a, 13a are thicker and the free ends 12c, 13c are thinner.
Alternatively, only the spring pieces 12 and 13 may be formed of a resin having better flexibility by two-color molding. In addition, a metal pin may be molded on the shaft portions 12a and 13a serving as base points of the bending of the spring pieces 12 and 13 for improving strength.
[0022]
FIG. 5 shows a second embodiment.
In the second embodiment, an S-shaped auxiliary spring piece 18 for connecting between the spring pieces 12 and 13 is provided by integral molding using a slide mold.
Both ends of the auxiliary spring piece 18 are connected near free ends 12c and 13c of the spring pieces 12 and 13. The other configuration is the same as that of the first embodiment, and the same reference numerals are given and the description is omitted.
[0023]
As described above, when the S-shaped auxiliary spring piece 18 is provided, when the wire harness W / H is pulled out following the opening operation of the back door, the S shape of the auxiliary spring piece 18 is flattened and the spring piece 12 is formed. , 13 are bent in the direction in which they approach each other, and the diameter of the wire harness W / H is reduced.
On the other hand, at the time of the closing operation of the back door, the free ends 12c, 13c of the spring pieces 12, 13 are pushed back in the separating direction by the restoring force of the auxiliary spring piece 18, and together with the restoring force of the spring pieces 12, 13 themselves, The spring pieces 12, 13 can be returned to their original positions, and the wire harness W / H can be pulled back into the spool protector 10.
[0024]
FIG. 6 shows a third embodiment.
In the third embodiment, rubber bands 20A and 20B are wound between the vicinity of the free ends 12c and 13c of the spring pieces 12 and 13 and the case body 11, respectively.
As shown in FIG. 6 (B), these rubber bands 20A and 20B are provided with stoppers 20b having through holes 20a at both ends, and pins 15b projecting from the bottom wall 15. The rubber bands 20A, 20B are extended over the inner surfaces of the spring pieces 12, 13 in a state where the wire harness W / H is passed between the spring pieces 12, 13 and the peripheral wall portion 14, and one end of the rubber bands 20A, 20B is a hole 15a in the bottom wall portion 15. Through the through hole 20a of the stopper 20b, the pin 15b is passed through, while the other end is passed through the pin 15b from the outer surface of the peripheral wall portion 14 to prevent the cap 22 from coming off. The other configuration is the same as that of the first embodiment.
[0025]
As described above, when the spring pieces 12, 13 are pulled in the opening direction by the rubber bands 20A, 20B, when the back door is closed, the spring pieces 12, 13 are quickly returned to the opening direction by the rubber bands 20A, 20B. The wire harness can be smoothly rewound into the spool protector 10.
[0026]
FIG. 7 shows a fourth embodiment.
In the fourth embodiment, the split spring piece is a spring piece 25 formed of a continuous single spring. The spring piece 25 made of a single spring has a curved arc shape having a substantially 3/4 circumference from the side where the electric wire lead-in portion 16 and the electric wire lead-out portion 17 are provided to the other side. The support shaft portion 25a is more erected. Arc-shaped spring plate portions 25b and 25c extend on both sides from the support shaft portion 25a, and extend along the inner peripheral surface of the peripheral wall portion 14.
The other configuration is the same as that of the first embodiment.
[0027]
A wire harness is wound between the outer peripheral surface of the spring piece 25 and the peripheral wall portion 14 in the same manner as in the first embodiment. When the back door is opened, the spring plate portions 25b and 25c close and shrink. The wire harness is bent in the radial direction to allow the wire harness to be pulled out, and when the back door is closed, the spring plate portions 25b and 25c are restored to their original shapes and pulled back so as to expand the wire harness.
Also in the fourth embodiment, an S-shaped auxiliary spring portion may be connected between the spring plate portions 25b and 25c as in the second embodiment, or a spring plate as in the third embodiment. The parts 25b and 25c may be urged by rubber bands in the opening direction.
[0028]
FIG. 8 shows a fifth embodiment.
In the fifth embodiment, a single spring piece 28 is provided in the same manner as the fourth embodiment. The spring piece 28 has an S-shape, and a shaft portion located at the center of the spring piece 28 from the center of the bottom wall 15. 28a is protruded. The free ends of the spring plates 28b and 28c that are curved in opposite directions from the support shaft 28a are arranged along the peripheral wall 14.
The other configuration is the same as that of the first embodiment.
[0029]
A wire harness is wound between the outer peripheral surface of the spring piece 28 and the peripheral wall portion 14 in the same manner as in the first embodiment. When the back door is opened, the spring plate portions 28b and 28c When the back door is closed, the spring plates 28b and 28c are restored to their original states and the wire harness is pulled back so as to expand its diameter.
In the fifth embodiment, the spring plates 28b and 28c may be urged in the opening direction by rubber bands as in the third embodiment.
[0030]
FIG. 9 shows a sixth embodiment.
Also in the sixth embodiment, one spring piece 30 is provided, is formed into an arc shape having a half or more circumference, and one end thereof is formed as a support shaft portion 30a erected from the bottom wall portion 15 and protrudes from the support shaft portion 30a. The arc-shaped spring plate portion 30b is formed along the inner peripheral surface of the peripheral wall portion 14.
The other configuration is the same as that of the first embodiment.
[0031]
A wire harness is wound between the outer peripheral surface of the spring piece 30 and the peripheral wall portion 14 in the same manner as in the first embodiment. When the back door is opened, the spring plate portion 30b bends in the diameter reducing direction and the wire harness is wound. When the back door is closed, the spring plate portion 30b is restored to its original shape and the wire harness is pulled back so as to expand its diameter.
Also in the sixth embodiment, the spring plate portion 30b may be urged in the opening direction by a rubber band as in the third embodiment.
[0032]
In addition, all of the above embodiments are applied to a wire harness that is routed between the vehicle body and a back door formed of a trunk room lid, but the back door that opens and closes the entire rear portion of the vehicle body, and furthermore, the vehicle body and side doors It can also be applied to wire harnesses to be routed between.
[0033]
【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 in accordance with the opening and closing operation of the door is accommodated in the circular spool protector. And, since a spring piece having an arc portion integrally formed with the main body case is provided along the peripheral wall portion in the spool protector, when a wire harness is wound and accommodated between the spring piece and the peripheral wall portion, When the door is opened, the spring piece is flexed to reduce the diameter of the wire harness so that it can be smoothly pulled out. When the door is closed, the spring piece is restored and the wire harness is pushed to the peripheral wall to expand the diameter. Therefore, the wire harness can be smoothly rewound and housed inside the protector.
[0034]
In particular, in the present invention, since the main body case of the spool protector is integrally formed including the spring piece and no separate spring piece is provided, the number of parts can be reduced, the number of mounting steps can be reduced, and the cost can be reduced. Can be.
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 material and is not damaged.
Furthermore, since the spring pieces and the like are all formed of synthetic resin, generation of abnormal noise due to the movement of the spring pieces can be suppressed when the wire harness is pulled out / rewinded, as compared with the case where metal is used. Have various advantages.
[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.
FIGS. 2A and 2B show a main body case of the spool protector of the first embodiment, wherein FIG. 2A is a perspective view and FIG. 2B is a perspective view showing a lid.
FIG. 3 is a perspective view showing a state where a wire harness is housed in the main body case.
FIG. 4 is a perspective view showing a state in which a wire harness is pulled out when a door is opened.
FIG. 5 is a perspective view showing a second embodiment.
FIG. 6A is a perspective view showing a third embodiment, and FIG. 6B is an explanatory view of a main part.
FIG. 7 is a perspective view showing a fourth embodiment.
FIG. 8 is a perspective view showing a fifth embodiment.
FIG. 9 is a perspective view showing a sixth embodiment.
FIG. 10 is a schematic view showing a conventional example.
[Explanation of symbols]
Reference Signs List 10 Spool protector 11 Main body cases 12, 13 Spring pieces 12a, 13a Support shaft portion 14 Peripheral wall portion 15 Bottom wall portion 15a Drilled hole 16 Electric wire draw-in portion 17 Electric wire draw-out portion 19 Cover W / H Wire harness

Claims (8)

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 opening and closing operations of the door, wherein the spool protector includes a circular bottom wall and a peripheral wall. Inside the main body case, a spring piece having an arc portion along the inner surface of the peripheral wall portion is provided integrally with a support shaft portion protruding from the bottom wall portion, and an electric wire is formed in a part of the peripheral wall portion in a cross shape. The lead-in part and the wire lead-out part are protruded by integral molding,
The wire harness is drawn into the main body case through the wire lead-in portion from the vehicle body side, wound between the spring piece and the peripheral wall portion, crossed from the wire lead-out portion to the door side, drawn out, and housed,
When the door is opened, the spring piece is flexed to reduce the diameter of the wire harness, and when the door is closed, the spring piece is restored and the wire harness is pushed toward the peripheral wall to expand the wire harness. A spool protector for a wire harness, wherein the spool protector is configured to be rewound and accommodated. The spool protector for a wire harness according to claim 1, wherein the spring piece comprises a pair of spring pieces arranged at opposing positions. The spring piece is provided with a support shaft protruding from the bottom wall at the center of the arc, and a single spring piece having a spring plate portion extending on both sides of the support shaft portion. The spool protector for a wire harness according to claim 1, wherein the spool protector extends along an inner surface of the peripheral wall portion. 4. The pair of spring pieces or the vicinity of the free end of the tip of the spring plate on both sides is connected by an S-shaped auxiliary spring piece, and the auxiliary spring piece urges in the opening direction. A spool protector for a wire harness as described in the above. The spring piece has an S-shape, has a support shaft protruding from the bottom wall at the center thereof, and has a spring plate extending in opposite directions on both sides of the support shaft. The spool protector for a wire harness according to claim 1, wherein the spring plate portions on both sides are arranged along the inner surface of the peripheral wall portion. The spring piece includes a support shaft protruding from the bottom wall at one end of the arc, and a spring plate is formed by bending a spring plate portion from the support shaft and extending the spring plate. The spool protector for a wire harness according to claim 1, wherein the spool protector extends along an inner surface of the peripheral wall portion. The spool for a wire harness according to any one of claims 1 to 6, wherein a rubber band is stretched between a vicinity of a free end of the spring piece and the main body case to urge the spring piece in an opening direction. Protector. The spool protector for a wire harness according to any one of claims 1 to 7, wherein a die-cutting hole for forming the spring piece is provided in the bottom wall portion.

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