JP5426793B2 - Harness surplus length absorption structure - Google Patents

Description

  The present invention relates to a harness surplus length absorbing structure for arranging a wire harness along a link arm and absorbing a surplus length of a wire harness when power is always supplied to a sliding door of an automobile.

  FIG. 7 shows an embodiment of a harness surplus length absorption structure in a conventional power supply device for a slide structure (see Patent Document 1).

  The harness surplus length absorbing structure in the power supply device 41 is configured such that the link arm 43 is pivotally supported in a synthetic resin protector 42 on the slide door side of the automobile, and a metal torsion is formed on the shaft portion 50 of the link arm 43. A coil spring 44 is mounted, the link arm 43 is twisted and biased upward by the torsion coil spring 44, a harness holding portion 45 is provided at the tip of the link arm 44, and the wire harness 46 is connected from the harness fixing portion 47 on the front end side of the protector 42. It is routed to the harness holding part 45 along the surface of the link arm 43 and routed from the harness holding part 45 to the harness fixing part 49 on the vehicle body side through the elongated lower opening 48 of the protector 42. The protector 42 includes a base 42a and a cover 42b.

  FIG. 7 shows a state in which the sliding door on the left side of the vehicle is slid forward and fully closed. In the half-open state of the sliding door, the wire harness 46 tries to hang down between the sliding door and the vehicle body (crossover part), but the link arm 43 is rotated upward (clockwise) by the urging force of the torsion coil spring 44. Move to absorb the extra harness length (slack). With the sliding door slid rearward and fully open, the wire harness 46 is pulled forward with the harness fixing portion 49 as a fulcrum, and the link arm 43 faces downward (counterclockwise) against the biasing force of the torsion spring 44. ).

JP 2008-148539 A (FIG. 8C)

  However, in the harness surplus length absorbing structure in the conventional power feeding device 41, the coil winding portion of the torsion coil spring 44 and the shaft portion (rotation) of the link arm 43 as the link arm (arm member) 43 rotates. There is a concern that the link arm 43 cannot be smoothly rotated due to friction with the shaft 50.

  This concern can occur not only in a sliding door of an automobile, but also in a sliding door of a vehicle other than an automobile, a sliding door of a device other than a vehicle, and the like. These slide doors and the like are collectively referred to as a slide structure, and the vehicle body and the like are collectively referred to as a fixed structure.

  In view of the above, the present invention provides a harness surplus length absorbing structure that can prevent the friction between the coil winding portion of the torsion coil spring and the rotation shaft of the arm member and smoothly rotate the arm member. The purpose is to do.

  In order to achieve the above object, in the harness surplus length absorption structure according to claim 1 of the present invention, an arm member is rotatably supported by a rotation shaft along a base member, A harness surplus length absorbing structure in which a wire harness is fixed to a harness fixing portion of the base member, the arm member is biased in a rotational direction by a torsion coil spring, and absorbs the surplus length of the wire harness, The rotation shaft of the arm member is surrounded by an annular wall provided on the base member, and a coil winding portion of the torsion coil spring is disposed along the outer peripheral surface of the annular wall.

  With the above configuration, the base member is disposed on the slide structure such as the slide door, and the wire harness is routed from the rotating distal end side of the arm member to the fixed structure such as the vehicle body. Then, the rotating shaft of the arm member is isolated from the coil winding portion of the torsion coil spring through the annular wall, and the arm member is smoothly moved with a small force without causing sliding resistance with the coil winding portion. Can be rotated.

  According to the first aspect of the present invention, since the friction between the coil winding portion of the torsion coil spring and the rotation shaft of the arm member does not occur, the arm member can be smoothly rotated and the slide structure can be opened and closed. It is performed well and smoothly, and the extra length of the wire harness is absorbed well, so that the reliability of constant power feeding to the slide structure is increased.

It is a front view which shows one Embodiment of the harness surplus length absorption structure in the electric power feeder for slide structures of this invention by a continuous line for every operation | movement. The state at the time of harness excess length absorption is shown roughly, (a) is a top view, (b) is a front view. It is a perspective view which shows the principal part of a harness surplus length absorption structure. It is a longitudinal cross-sectional view which shows the principal part of a harness surplus length absorption structure similarly. It is a longitudinal cross-sectional view explaining the malfunction when not employ | adopting the harness surplus length absorption structure of this invention. It is a front view which shows a state when there is no stopper part with respect to an arm member. It is a front view which shows one form of the harness surplus length absorption structure in the electric power feeder for the conventional slide structure.

  FIG. 1 shows an embodiment of a harness surplus length absorbing structure in a power feeding device for a slide structure according to the present invention.

  1 is a fully open state of a slide door (not shown) on the right side of an automobile as a slide structure, a center view is a half open state of the slide door, and a left view is a fully closed state of the slide door. All are indicated by solid lines for convenience of explanation. In addition, when it mounts in the sliding door of the vehicle left side like the prior art example of FIG. 7, it becomes a form reversed front and rear with FIG.

  The harness surplus length absorbing structure of the power supply device 1 is provided with a synthetic resin or metal link arm (arm member) 3 provided on a synthetic resin protector base (base member) 2 so as to be rotatable about a rotation shaft 4. A harness holding member 5 is rotatably provided at the distal end side of 3 and the link arm 3 is urged counterclockwise by a metal torsion coil spring 6. The wire harness 7 is routed from the harness fixing portion 8 on the front end side of the protector base 2 to the harness holding member 5 through the back side of the link arm 3.

  In particular, a large-diameter annular wall 9 is disposed outside the rotary shaft 4 of the link arm 3, and a coil winding portion 6 a of a torsion coil spring 6 is mounted on the outer peripheral surface of the annular wall 9.

  Further, when the link arm 3 is rotated counterclockwise against the urging force of the torsion coil spring 6 when the slide door (not shown) is fully opened as shown in the right side of FIG. The protector base 2 is provided with a stopper portion 10 that is in contact with the stopper portion 10 and prevents further rotation.

  As shown schematically in FIGS. 2A and 2B, the link arm 3 is arranged in parallel to the vertical substrate portion 11 of the protector base 2, and the substrate portion 11 and the back surface of the link arm 3 (opposite surface to the protector base). The wire harness 7 is inserted between the wire arm 7 (the harness portion inserted on the back side in FIG. 2B is indicated by reference numeral 7a), and the link arm 3 is connected to the wire arm 7 in the link arm thickness direction (the protector base thickness direction). The position is controlled by preventing jumping out.

  Thereby, the interference sound with the protector cover (not shown) due to the shake of the wire harness 7, the interference with the outside when the protector cover is not used, the abnormal noise caused thereby, the wear or damage of the wire harness 7, Abnormal harness absorption due to malfunction of the wire harness 7 is prevented.

  2A, the wire harness 7 is routed from the harness holding member 5 along the back surface 3a of the link arm 3 substantially straight (without bending in the link arm thickness direction). It is raised toward the harness fixing portion 8 of the protector base 2 through the lower side of the rotating shaft 4.

  As shown in FIG. 2B, the front view of the wire harness 7 is curved in a substantially arc shape with a small radius upward from the harness holding member 5 (the upward curved portion is indicated by reference numeral 7b), and the back side of the substantially horizontal link arm 3 is Passed (crossing the link arm 3 obliquely downward), bent downward in a substantially arc shape with a large radius (downward curved portion is denoted by reference numeral 7c), and the harness rising portion 7d on the harness fixing portion 8 of the protector base 2 Is fixed by band tightening.

  The wire harness portion 7 along the protector base 2 in FIG. 2 is preferably configured by covering a plurality of electric wires with a flexible synthetic resin mesh tube or the like in order to improve flexibility, and the distal end side of the harness holding member 5 A plurality of wires are covered with a synthetic resin corrugated tube (a harness protection tube having alternating circumferential grooves and ridges) in the wide portion 5a of the vehicle, and arranged up to the harness fixing portion 12 on the vehicle body side in FIG. It is preferable to search.

  In the example of FIG. 1, the protector is configured by the protector base 2 alone. However, for example, when a protector cover (not shown) is used, the skirt is made shorter than the protector base 2 and the harness holding member 5 is protected by the protector cover. Expose to the outside. A long opening (not shown) for leading out the wire harness is formed between the substrate portion 11 of the protector base 2 and the skirt portion of the protector cover.

  As shown on the right side of FIG. 1, when the sliding door is fully opened, the wire harness 7 is pulled forward with the harness fixing portion 12 on the vehicle body side as a fulcrum, and the link arm 3 is pivoted substantially vertically downward to hold the harness. The member 5 pivots forward more than the link arm 3 with the hinge shaft 13 at the tip of the link arm as a fulcrum.

  The wire harness 7 bends obliquely rearward and upward from the harness holding member 5 (the curved portion 7e is indicated by a symbol), and traverses through the back side of the link arm 3 along the protector base 3 (the harness portion passing through the back side is denoted by reference symbol 7a). ), Is started up at the front end side of the protector, is connected to the sliding door side from the harness fixing portion 8 after the harness fixing portion 8, and is connected to a door side auxiliary machine (not shown) by a connector.

  As shown in the center diagram of FIG. 1, when the slide door is half-opened, the link arm 3 is rotated almost horizontally counterclockwise by the biasing force of the torsion coil spring 6, and the harness holding member 5 is moved from the link arm 3. It hangs down substantially vertically, lifts the wire harness 7 substantially vertically and absorbs the excess length, and prevents the sag of the harness between the harness fixing portion 12 on the vehicle body side (crossover portion).

  The wire harness 7 is curved upward from the harness holding member 5 (the curved portion is indicated by reference numeral 7f), passes through the back side of the link arm 3 (the harness portion passing through the back side is indicated by reference numeral 7a), and is downward with a large radius. Curved (the curved portion is indicated by reference numeral 7g) and continues upward to the harness fixing portion 8.

  As shown on the left side of FIG. 1, when the sliding door is fully closed, the wire harness 7 is pulled backward with the harness fixing portion 12 on the vehicle body side as a fulcrum, and the link arm 3 rotates slightly downward than when the door is half open. However, the harness holding member 5 is positioned obliquely rearward and downward. The wire harness 7 curves downward from the harness holding member 5 (the curved portion is indicated by reference numeral 7f), passes through the back side of the link arm 3 (the harness portion passing through the back side is indicated by reference numeral 7a), and is bent downward. (The curved portion is indicated by reference numeral 7g) and continues upward to the harness fixing portion 8.

  As shown in FIGS. 3 to 4, a small-diameter rotating shaft 4 is integrally formed on the link arm 3 so as to protrude, and a large-diameter annular wall 9 is integrally formed on the protector base 2 on the outside of the rotating shaft 4. 9 is disposed concentrically inside the inner space 9a.

  FIG. 5 shows that the coil winding portion of the torsion coil spring 44 is arranged close to the outer periphery of the rotation shaft 50 of the link arm 43 as shown in the biasing structure of the link arm 43 of the conventional example (FIG. 7). When the link arm 43 is rotated, the coil winding portion is reduced in diameter and comes into strong contact with the rotating shaft to generate a large frictional resistance. For example, the opening operation force of the sliding door is increased, and the rotating shaft 50 is operated when the sliding door is closed. There is a concern that the biasing force of the torsion coil spring 44 may be reduced due to the frictional resistance, and the harness surplus length absorption performance may be reduced. However, the configuration of the present invention eliminates this concern, and the link arm 3 Strong sliding contact between the rotating shaft 4 and the torsion coil spring 6 can be prevented, and the extra length absorption performance of the wire harness 7 can be maintained well.

  The rotating shaft 4 has, for example, a circular hole (not shown) into which a small shaft (not shown) having a circular cross section protruding integrally from the surface of the substrate portion 11 of the protector base 2 is inserted. The inner peripheral surface of a hole (not shown) is rotatably slidably contacted with the outer peripheral surface of the protector base 2 so as to be rotatable. For example, a hole (not shown) penetrates the link arm 3, and a bolt having a large-diameter head for retaining from the surface side of the link arm 3 through the hole (not shown) of the link arm 3 (see FIG. (Not shown) is fixed to a small shaft (not shown). It is also possible to provide a through-hole in a small shaft (not shown) and rotatably support the rotating shaft 4 of the link arm 3 with a bolt or the like from the back side of the protector base 2.

  In the example of FIG. 4, the rotation shaft 4 of the link arm 3 is formed to have a considerably smaller diameter than the annular wall (tubular wall) 9 of the protector base 2, and there is a gap 9 a between the rotation shaft 4 and the annular wall 9. However, the outer diameter of the rotating shaft 4 is slightly smaller than the inner diameter of the annular wall 9, and the outer peripheral surface 4 a of the rotating shaft 4 can be slidably rotated on the inner peripheral surface 9 b of the annular wall 9. is there.

  The inner diameter portion of the coil winding portion 6 a of the torsion coil spring 6 is preferably close to the outer peripheral surface 9 c of the annular wall 9, and the link arm side winding end 6 b of the coil winding portion 6 a is preferably not in contact with the back surface 3 a of the link arm 3. One flange 6d of the torsion coil spring 6 shown in FIG. 3 protrudes from the link arm side winding end 6b in the tangential direction, and the other flange 6d is outside the annular wall 9 (on the diagonally rear lower side). The other hook portion 6e of the torsion coil spring 6 in FIG. 3 is formed to project in the tangential direction from the protector base side winding end 6c of the coil winding portion 6a in FIG. The other flange portion 6e is hooked and engaged with the spring receiving portion 15 of the protector base 2 on the outer side (front upper side) of the annular wall 9.

  In FIG. 3 (right side of FIG. 1), the torsion coil spring 6 resists the force that urges the link arm 3 upward in the counterclockwise direction, and the one flange 6d rotates clockwise with the other flange 6e as a fulcrum. The coil winding portion 6a shrinks in the radial direction as compared with the free state and tends to come into strong contact with the outer peripheral surface 9c of the annular wall 9, but the rotating shaft 4 of the link arm 3 is inside the annular wall 9. The coil winding portion 6a is not affected by an increase in sliding frictional resistance.

  As shown in FIG. 3, when the link arm 3 is rotated clockwise, the front side surface 3 c of the base end portion of the link arm 3 comes into contact with the stopper wall (stopper portion) 10 of the protector base 2 and is rotated further. The movement is prevented.

  In the conventional example of FIG. 7, when the protector 42 moves rearward (left side in the drawing) from the fully closed state of the sliding door of FIG. 7 and the sliding door is fully opened, the link arm 43 is moved from the state of FIG. When it rotates greatly counterclockwise and interferes with other parts (not shown) close to the front end 42c side of the protector 42, or when the sliding door is opened strongly (impactly) to overstroke In addition, there is a concern that the torsion coil spring 44 is excessively twisted against the bias and plastically deforms, the spring force is weakened, and the harness surplus length absorption performance may be lowered. Thus, excessive rotation of the link arm 3 against the urging of the torsion coil spring 6 can be prevented, and the extra length absorption performance of the wire harness 7 can be maintained well.

  If the stopper wall 10 is not provided, as shown in FIG. 6, when the sliding door is fully opened (especially during an overstroke when it is strongly opened), the link arm 3 is largely rotated clockwise and the harness holding member 5 is The link arm 3 protrudes forward from the protector base 2 in the extending direction of the link arm 3 and interferes with the structure 23 such as other parts on the front side of the protector, and the torsion coil spring 6 is strongly twisted in the diameter reducing direction of the coil winding portion 6a. Therefore, there is a concern that the spring force of the torsion coil spring 6 is reduced due to plastic deformation (the harness surplus length absorption performance is reduced).

  As shown in FIG. 3, the stopper wall 10 prevents over-rotation of the link arm 3, thereby preventing interference with the other parts 23 on the front side of the protector and reducing the spring force of the torsion coil spring 6 ( Reduction in harness surplus length absorption performance) is prevented.

  The stopper wall 10 is a part of the wall portion 17 that continues downward from the upper end wall 16 that is a part of the peripheral wall of the protector base 2, and is disposed in parallel to the upper end wall 16. Further, a hole 18 for fixing the protector base 2 to a slide door panel (not shown) and an annular protective wall 19 around the hole 18 are arranged, and a spring receiving portion 15 is arranged on the upper side of the protective wall 19 to provide a stopper wall. An annular wall 9 is arranged on the upper obliquely rear side of 10.

  The stopper wall 10 extends from the upper vertical front wall 17 to the front end wall 20 that is a part of the peripheral wall of the protector base 2 from the lower surface of the stopper wall 10 to the front surface of the front wall (represented by reference numeral 17). A path 21 is formed, a harness fixing portion (band insertion portion) 8 is provided at the upper end of the harness lead-out portion 21, and the stopper wall 10 also has a function of preventing the wire harness 7 from moving to the torsion coil spring 6 side. Yes.

  The stopper wall 10 of this example has an abutting surface 10a and a stepped portion 10b at the tip, and a portion 10c along the protector base substrate portion 11 of the stepped portion 10b is extended to enter the back side of the link arm 3, The arm 3 is guided toward the substrate part 11 so as not to swing in the arm thickness direction. The upper end wall 16 and the front end wall 20 which are the peripheral walls of the protector base 2 are provided with frame portions (locking means) 22 for engaging locking claws of a protector cover (not shown), for example.

  In the above-described embodiment, the harness holding member 5 is provided on the link arm 3 so as to be rotatable. In this case, it is preferable that the harness holding member 5 is bent together with the link arm 3 in a substantially U shape, and the harness holding member 5 may be referred to as a harness holding portion.

  In addition to the harness surplus length absorbing structure, the configuration in the above embodiment is also effective as a power feeding device for a slide structure, a harness wiring structure for a power feeding device, a harness wiring structure for a slide structure, and the like. Is.

  The harness surplus length absorbing structure according to the present invention can be used for constantly supplying power to a sliding door or a sliding portion in an automobile, a vehicle other than an automobile, a device other than a vehicle, or the like.

2 Protector base (base member)
3 Link arm (arm member)
4 Rotating shaft 6 Torsion coil spring 6a Coil winding part 7 Wire harness 8 Harness fixing part 9 Annular wall 9c Outer peripheral surface

Claims (1)

An arm member is rotatably supported by a rotating shaft along the base member, and a wire harness is fixed to a rotating distal end side of the arm member and a harness fixing portion of the base member, and the arm member is a torsion coil spring. A harness surplus length absorbing structure that is biased in the rotational direction to absorb the surplus length of the wire harness,
A harness surplus characterized in that the rotation shaft of the arm member is surrounded by an annular wall provided in the base member, and a coil winding portion of the torsion coil spring is disposed along an outer peripheral surface of the annular wall. Long absorption structure.

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