JP3670916B2 - Wire harness winding device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wire harness winding device that unwinds and winds up harnesses such as electric wires, cables, and wire harnesses that have already been routed in an automobile.
[0002]
[Prior art]
As a general winding device that extends and winds harnesses for a long time, for example, there is a cable winding mechanism described in JP-A-9-84244. A harness take-up device is also well known, in which harnesses that are routed between a body panel and a door of an automobile are extended and unwound for a long time following the opening and closing operation of the door.
[0003]
Typically, the latter automobile harness winding device will be schematically described with reference to an exploded sectional view of FIG. 7 and an assembled sectional view of FIG. In this case, it has a winding case 1 forming an apparatus main body, and the winding case 1 is composed of a cylindrical case main body 2 and a winding drum 3 rotatably supported in the inside thereof. In addition, a winding spring 4 is installed between the two members, and a coil spring is mounted, and the wire harness 5 indicated by the phantom line in FIG. Energized. Furthermore, although not shown in both drawings, a case lid that covers and closes the case main body 2 is provided as a constituent member of the winding case 1.
[0004]
The case main body 2 has a drum rotation support shaft 2b raised at an inner central position surrounded by a cylindrical peripheral wall 2a, and an inner and outer double spring spring inner plate 2c and a substantially semicircular spring concentrically with the drum rotation support shaft 2b. A contact outer plate 2d is formed. Further, the case main body 2 itself is attached and fixed to, for example, the body panel side via a rod 6 fitted to the drum rotation support shaft 2b.
[0005]
The take-up drum 3 has a cylindrical bearing boss 3b that protrudes on the central axis of the drum body 3a, and is rotated by fitting the bearing boss 3b to the drum rotation support shaft 2b on the case body 2 side. Supported as possible. The bearing boss 3b is received from the outside by an annular boss receiver 2e provided on the case body 2 side. A harness winding groove 3c is formed in a concave cross section along the outer periphery of the drum body 3a, and the wire harness 5 is wound around the harness winding groove 3c. Further, spring stoppers 3d for locking both ends 4a of the winding spring 4 are provided in a protruding shape at appropriate positions on the inner surface of the drum body 3a. Further, as shown in FIG. 8, when the take-up drum 3 is incorporated in the case main body 2, a retaining ring 7 is attached to the upper portion of the drum rotation support shaft 2b on the case main body 2 side to prevent the drum from coming off.
[0006]
Therefore, when the winding spring 4 is in a normal state before the operation, that is, when the wire harness 5 is wound around the winding drum 3, the inner peripheral surface of the spring is the outer peripheral surface of the spring inner plate 2c of the case body 2. By abutting and the outer peripheral surface of the spring contacting the inner peripheral surface of the spring contact outer plate 2d, useless movement such as displacement of the spring shaft is restricted. Further, when the spring is actuated, that is, when the wire harness 5 is drawn out from the winding drum 3 for a long time, the winding spring 4 is reduced in diameter. At this time, the spring inner peripheral surface abuts on the outer peripheral surface of the spring abutting inner plate 2c on the case body 2 side, thereby restricting further spring contraction operation.
[0007]
The wire harness 5 is routed with one end connected to the electrical circuit of the body panel and the other end connected to the electrical circuit of the door. Accordingly, the wire harness 5 is extended from the winding case 1 against the winding spring 4 following the door opening operation, and the wire harness 5 is wound by the winding spring 4 following the door closing operation. It is rewound into the case 1. The take-up drum 3 is urged to rotate in the forward direction in which the wire harness 5 is taken up by the take-up spring 4 and rotates in the reverse direction against the take-up spring 4 during feeding.
[0008]
[Problems to be solved by the invention]
By the way, in the case of the wire harness winding device for automobiles shown in FIGS. 7 and 8, a mechanical improvement portion remains.
[0009]
The winding spring 4 operates to reduce the diameter of the spring corresponding to the feeding and unwinding of the wire harness 5 and expands the diameter so as to return to the original spring diameter. In order to allow and restrict such a spring expansion / contraction operation, as described above, the spring contact inner plate 2c and the spring contact outer plate 2d are provided on the case body 2 side. There is a gap between the inner and outer double spring contact inner plates 2c and the spring contact outer plate 2d due to the difference in diameter corresponding to the expansion and contraction of the spring, which causes inconvenience that causes the winding spring 4 to rattle. .
[0010]
Furthermore, one of the problems is that when the winding spring 4 is operated to reduce the diameter, that is, when the wire harness 5 is fed out against the elastic force, the winding spring 4 that is operating to reduce the diameter is placed on the spring abutting inner plate 2c. A gap (indicated by reference numeral 8 in FIG. 8) formed between the peripheral edge and the inner surface of the drum body 3a of the winding drum 3 enters and bites. The biting of the winding spring 4 hinders the rotational operation of the winding drum 3 and has a problem that the wire harness 5 is not smoothly fed and wound.
[0011]
Therefore, the object of the present invention is particularly suitable for a wire harness take-up device that takes out and winds up harnesses that are routed between the body panel and the door of an automobile in conjunction with the opening / closing operation of the door in an automobile. An object of the present invention is to provide a wire harness take-up device that can smoothly unwind and take up a wire harness without preventing the take-up spring from rattling or biting and without hindering the rotation of the take-up drum. .
[0012]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the wire harness winding device according to claim 1 according to the present invention has both ends connected to the structure body and the movable body that opens and closes with respect to the structure body. The wire harness is routed and wound by following the opening and closing movement of the movable body by a winding drum provided rotatably inside the winding case, and a wire rod provided inside the winding case . A wire harness take-up device in which the take-up drum is rotated and biased by a take-up spring in a normal rotation direction that is the take-up direction of the wire harness, and the take- up case is located at the center of the case body. It has a drum rotation support shaft that rotatably supports the winding drum, and is provided on the outer concentric circle of the drum rotation support shaft in an annular shape or an arc shape before the wire harness is extended. Having a first spring regulating wall that movement limiting contact from the inner peripheral side to the root if the winding of the wire, the winding drum are the same diameter as the first spring regulating wall on the outer concentric circle of the rotational center And having a second spring regulating wall that regulates the operation by abutting the winding spring of the wire from the inner peripheral side in cooperation with the first spring regulating wall. To do.
[0013]
From the above configuration, by providing the first and second spring restricting walls having the same outer diameter on both the case body and the winding drum on the concentric circle with the rotation axis, the first and second spring restricting walls are particularly provided. It is made to contact | abut from the inner peripheral surface to the winding spring of the wire at the time of diameter reduction operation | movement, and the further diameter reduction operation | movement of a spring is controlled. This prevents the wire take-up spring from biting between the case body and the take-up drum.
[0014]
Further, in the wire harness winding device according to claim 2, the first and second spring restricting walls are abutted from opposite directions on the rotation axis, and the height dimension of the two spring restricting walls is abutted to the height dimension. It is characterized by being formed so as to substantially correspond to the spring length of the winding spring of the wire .
[0015]
From the above configuration, the height of the first and second spring regulating walls that are abutted with each other is formed corresponding to the spring length of the winding spring, so that the winding spring of the wire rod can be expanded. Even when the diameter is reduced, the operation of the entire spring is restricted by abutting from the inner peripheral surface of the spring. This prevents part of the winding spring of the wire from entering between the case body and the winding drum and prevents biting.
[0016]
More specifically, when the first and second spring restricting walls are abutted at a position corresponding to approximately half of the length of the winding spring of the wire winding spring, that is, the first and second spring restricting walls are abutted. It is effective to prevent biting if the part is in the center. That is, the winding spring of the set wire is the center of the spring longitudinal direction and has a spiral shape, the spring ends is straight. For this reason, conventionally, both ends of the linear spring are parallel to the abutting surface and are easy to bite. In order to solve this problem, if the butt surfaces of the first and second spring restricting walls are set at the center and greatly removed from the positions of both ends of the linear spring, there is no need to worry about the biting of the spring into the butt surface. is there.
[0017]
According to a third aspect of the present invention, in the wire harness winding device, the winding spring of the wire rod at the time of winding the wire harness is further abutted on the outer concentric circle of the second spring regulating wall in the case body from the outside. A third spring regulating wall for regulating the operation is provided.
[0018]
From the above configuration, in this case, a third spring regulating wall is further provided on the outer concentric circles of the first and second spring regulating walls having the same diameter provided in the first and second aspects of the invention. The third spring regulating wall is brought into contact with the outer peripheral surface of the winding spring of the wire, to regulate the particular operation of the diameter direction of the winding spring of the wire. Thereby, unnecessary movement of the winding spring of the wire is eliminated, and rattling is prevented.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a wire harness winding device according to the present invention will be described in detail with reference to the drawings.
[0020]
1 and 2 are a perspective view and an assembled perspective view showing the wire harness winding device 10 of this example. The wire harness 20 is formed by covering and protecting an assembled electric wire in which a plurality of electric wires are bundled or twisted with a protective tube 21, and when the movable body opens and closes with respect to the structural main body, the structural main body And connect between the movable body and the movable body.
[0021]
When the structural body is a body panel such as an automobile upper back panel, for example, the wire end 22 on one end side of the wire harness 20 is connected to the electric circuit of the upper back panel via a bracket-shaped clip 24. . Further, when the movable body is, for example, a luggage door (commonly called a trunk room door), the electric wire end 23 on the other end side of the wire harness 20 is connected to an electric circuit of the luggage door via a resin mold clip 25.
[0022]
The wire harness take-up device 10 can be retrofitted and incorporated into a wire harness 20 that has already been routed between the wire harness winding device 10 and the upper back panel. Can be extended and rewinded for a long time.
[0023]
As shown in each figure in FIG. 3 and subsequent figures, a winding case 11 constituting the main body of the apparatus 10 has a cylindrical case main body 12 and a case lid 13 which is coupled to the cylindrical case main body 12 by elastic uneven fitting. The winding drum 14 and the winding spring 15 are accommodated inside.
[0024]
First, in the case main body 12, the drum rotation support shaft 12b is raised at the inner center position surrounded by the cylindrical peripheral wall 12a, and the concentric inner and outer double spring spring inner plates (first spring regulating walls). 12c and a substantially semicircular spring pad outer plate (third spring regulating wall) 12d are formed. Further, the case main body 12 itself can be fixedly attached to, for example, the upper back panel which is a structural main body through a rod 16 fitted to the drum rotation support shaft 12b. Further, the case main body 12 is provided with a harness feeding opening portion 12f having a U-shaped cross section that protrudes outward so as to open a part of the peripheral wall 12a.
[0025]
The case lid 13 is assembled by engaging the peripheral edge 12a of the case main body 12 with an unevenness. The case lid 13 is provided with a harness locking port portion 13a protruding from a substantially central position of the outer surface, and provided with a harness feeding port portion 13b having a U-shaped cross section protruding outward from a part of the outer peripheral edge. Yes. The harness feed-out port portion 13b is coupled to the harness feed-out port portion 12f provided in the case main body 12 so as to be aligned vertically. Further, a bearing portion 13 c is provided so as to protrude from the center of the case lid 13 to the outside.
[0026]
A winding drum 14 for feeding and unwinding the wire harness 20 is accommodated in the winding case 11 composed of the case body 12 and the case lid 13, and further, between the winding drum 14 and the case body 12. A take-up spring 15 by a coil spring is mounted. The take-up spring 15 urges the take-up drum 14 in the normal rotation direction to rewind the wire harness 20 fed from the harness feed ports 12f and 13b.
[0027]
As shown in FIG. 4, the take-up drum 14 is provided with a cylindrical bearing boss 14b on the central axis of the drum body 14a, and the bearing boss 14b is fitted to the drum rotating support shaft 12b on the case body 12 side. It is supported so that it can rotate together. The bearing boss 14b is received by an annular boss receiver 12e provided on the case body 12 side from the outside. Further, a winding groove portion 14c having a concave groove shape is formed along the outer periphery of the drum body portion 14a, and the wire harness 20 is wound around the winding groove portion 14c. Further, spring stoppers 14d for locking both ends 15a and 15b of the winding spring 15 are provided in a protruding shape at appropriate positions on the inner surface of the drum body 14a.
[0028]
Further, in the winding drum 14, a cylindrical spring contact inner plate (second spring regulating wall) 14e which is a gist of the present invention is provided on a concentric circle outside the bearing boss 14b. The outer diameter of the cylindrical spring pad inner plate 14e is formed to have the same dimension d as the outer diameter of the spring pad inner plate (first spring regulating wall) 12c provided in the case body 12. Further, the rising height dimensions of the spring pad inner plates 14e and 12c are substantially the same and are formed to the dimension h, and are set to be substantially the same as the spring height H of the winding spring 15 by adding both heights h. Has been.
[0029]
Next, for the wire harness winding device 10 of the present embodiment configured as described above, for example, the operation and action when retrofitting and installing the wire harness 20 already routed between the upper back panel and the luggage door of the automobile will be described. .
[0030]
As shown in FIG. 1 and FIG. 2, the wire harness 20 is configured such that the wire end 22 on one end side is connected to the upper back panel via the clip 24 and the wire end 23 on the other end side is connected via the clip 25. Connected to the luggage door.
[0031]
The winding device 10 is retrofitted and incorporated at an arbitrary position using the surplus portion of the wire harness 20 that has already been routed. 13 is removed and the winding drum 14 is opened. A surplus length part of the wire harness 20 is wound around the winding groove part 14c of the winding drum 14.
[0032]
The wire end 22 on one end of the wound wire harness 20 is twisted and passed through the harness pull-out recess 14f of the take-up drum 14 and further drawn out from the harness locking opening 13a of the case lid 13. The harness length portion on the one end side pulled out from there is locked through the clip 24 as described above at the wire end 22 at the tip, and is connected to the electric circuit on the upper back panel side.
[0033]
On the other hand, the electric wire end 23 on the other end side of the wire harness 20 is drawn to the outside from the harness feeding opening portions 12f and 13b where both the case main body 12 and the case lid 13 are combined. The other-side harness length portion drawn out from there is locked via the clip 25 at the end of the wire end 23 as described above, and is connected to the electrical circuit on the luggage door side. As described above, after the extra length part of the wire harness 20 is wound around the winding drum 14, the case lid 13 is assembled to the case main body 12 by being elastically fitted to the case main body 12.
[0034]
When the luggage door is closed during use after the actual machine is mounted, most of the length of the wire harness 20 is wound around the winding drum 14 in the winding case 11 and stored.
[0035]
5 (a) and 5 (b) show the harness winding accommodation state before operation. At this time, the winding spring 15 has a normal spring diameter, and the inner and outer peripheral surfaces of the spring are in contact with the outer peripheral surfaces of the spring contact inner plates 12c and 14e and the inner peripheral surface of the spring contact outer plate 12d, respectively. As a result, useless movement such as displacement of the spring center axis is restricted.
[0036]
When the luggage door is opened from this state, the wire harness 20 is pulled from the electric wire end 23 on the other end side following the door opening operation. The tensile force causes the wire harness 20 to be pulled out from the harness feeding openings 12f and 13b of the winding case 11, and the winding drum 14 rotates reversely against the winding spring 15 so that the wire harness 20 is moved to a required length. Pull out. The winding spring 15 is contracted by the harness feeding force.
[0037]
6 (a) and 6 (b) show a state during the harness feeding operation. The winding spring 15 is compressed by the harness feeding force to reduce its diameter, and its inner peripheral surface comes into contact with the outer peripheral surfaces of the spring contact inner plates 12c and 14e of both the case body 12 and the winding drum 14. Thereby, the operation of the winding spring 15 to further reduce the diameter is restricted.
[0038]
At that time, the spring contact inner plates 12c and 14e of both the case main body 12 and the winding drum 14 abut each other from above and below to form a cylindrical wall having a height dimension h + h. Since the height of the cylindrical wall is substantially equal to the spring height dimension H of the winding spring 15, the cylindrical wall obstructs the winding spring 15 during the diameter reduction operation and the diameter of the winding spring 15 is further reduced. The shaft 12b and the bearing boss 14b are prevented from approaching around the rotation axis. This prevents the take-up spring 15 from biting and preventing the take-up drum 14 from rotating.
[0039]
That is, the spring abutting inner plates 12c and 14e forming the cylindrical wall of the height dimension h + h are abutted from above and below, and the abutting surfaces are portions corresponding to substantially half of the spring height dimension H of the winding spring 15. The straight ends of the set take-up spring 15 cannot be bitten in parallel with the butting surfaces of the spring abutting inner plates 12c, 14e at completely different positions.
[0040]
In this way, since the movement of the winding spring 15 is preferably restricted regardless of whether the harness is being fed or unwound, the fluttering of the spring is sealed, and the winding drum 14 is smooth. Enables rotation.
[0041]
In addition, in this example, although the wire harness winding device 10 was retrofitted into the already installed wire harness 20 and was installed between the upper back panel 30 and the luggage door 31, the upper back panel 30 and The present invention is not limited to the luggage door 31 and can be applied to doors such as a hatchback.
[0042]
【The invention's effect】
As described above, in the wire harness winding device according to claim 1 of the present invention, the first and second spring regulating walls having the same outer diameter are concentric with the rotation axis on both the case body and the winding drum. By providing the first and second spring restricting walls on the winding spring of the wire rod particularly during diameter reduction operation, the inner diameter of the first and second spring regulating walls is made to abut from the inner peripheral surface, thereby restricting further diameter reduction operation of the spring. Thereby, the winding spring of the wire rod can be prevented from biting between the case main body and the winding drum, and the wire harness can be smoothly fed out and rewound.
[0043]
Moreover, the wire harness winding device according to claim 2 is formed such that a height dimension in which the first and second spring regulating walls are abutted with each other corresponds to a spring length of the winding spring of the wire , When the diameter of the winding spring of the wire rod is increased or reduced, the operation of the entire spring is regulated by contacting the spring from the inner peripheral surface of the spring. This prevents part of the winding spring of the wire from entering between the case body and the winding drum and prevents biting.
[0044]
The wire harness winding device according to a third aspect of the present invention is the third spring regulating wall on the outer concentric circles of the first and second spring regulating walls having the same diameter provided in the inventions of the first and second aspects. providing a result, the third spring regulating wall is brought into contact with the outer peripheral surface of the winding spring of the wire, to regulate the particular operation of the diameter direction of the winding spring of the wire. Thereby, unnecessary movement of the winding spring of the wire can be eliminated, and rattling or the like can be effectively prevented.
[Brief description of the drawings]
FIG. 1 is a partially transparent perspective view of a wire harness winding device according to an embodiment of the present invention.
FIG. 2 is an assembly perspective view of the wire harness winding device of the present embodiment.
FIG. 3 is an exploded perspective view of the wire harness winding device of the present embodiment.
FIG. 4 is an exploded cross-sectional view of the wire harness winding device of the present embodiment.
FIGS. 5A and 5B are a plan sectional view and a side sectional view showing a mode of a winding spring at the time of winding a harness in the wire harness winding device of the present embodiment.
FIGS. 6A and 6B are a plan sectional view and a side sectional view showing a mode of a winding spring when the harness unwinding operation is performed in the wire harness winding device of the present embodiment.
FIG. 7 is an exploded cross-sectional view of a conventional wire harness winding device.
FIG. 8 is an assembled cross-sectional view showing a state in which a winding spring bites around a winding drum in a conventional wire harness winding device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Wire harness winding device 11 Winding case 12 Case main body 12b Drum rotation spindle 12c Spring inner plate (1st spring control wall)
12d Spring plate (third spring regulating wall)
13 Case lid 13a Harness feeding opening 13b Harness locking opening 14 Winding drum 14b Bearing boss 14c Winding groove 14e Spring pad inner plate (second spring regulating wall)
15 Winding spring 20 Wire harness 21 Protective tube 22 Wire end 23 at one end Wire end at the other end

Claims (3)

A wire harness is routed by connecting both ends to each of the structure body and a movable body that opens and closes relative to the structure body, and the wire harness is movable by a winding drum that is rotatably provided inside a winding case. The winding drum is fed or wound up following the opening and closing movement of the body, and the winding drum is rotated and urged in the normal rotation direction which is the winding direction of the wire harness by the winding spring of the wire provided inside the winding case. A wire harness winding device,
The winding case has a drum rotating support shaft that rotatably supports the winding drum at the center of the case body, and is provided in an annular or arc shape on the outer concentric circle of the drum rotating support shaft. A first spring restricting wall that restricts the operation by abutting from the inner peripheral side to the winding spring of the wire at the time of feeding;
The winding drum is provided on the outer concentric circle of the rotation center in an annular or arc shape having the same diameter as the first spring restricting wall, and cooperates with the first spring restricting wall to wind the wire. A wire harness winding device comprising a second spring regulating wall that abuts against a spring from an inner peripheral side and regulates an operation. The first and second spring regulating walls are butted against each other on the rotation axis from the opposing direction, and the height dimension of the two spring regulating walls butted substantially corresponds to the spring length of the winding spring of the wire rod. The wire harness winding device according to claim 1, wherein the wire harness winding device is formed. In the case body, a third spring regulating wall is provided on the outer concentric circle of the second spring regulating wall to regulate the operation by abutting the winding spring of the wire rod when winding the wire harness from the outer peripheral side. The wire harness winding device according to claim 1 or 2.

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