JP4560436B2 - Harness wiring structure - Google Patents

Description

  The present invention relates to a harness routing structure that is applied to, for example, a reclining seat of an automobile and suppresses the slack of the wire harness when the seat is rotated (turned down).

  FIG. 7 shows one form of a conventional harness routing structure (see Patent Document 1).

  In this structure, a harness support groove 53 is provided in the hinge shaft 52 of the front door 51 of the automobile, and a wire harness 55 routed from the vehicle body 54 to the door 51 is inserted into the harness support groove 53 so that the door 51 is opened and closed. The wire harness 55 is bent around the hinge shaft 52.

  FIG. 8 shows another form of a conventional harness routing structure (see Patent Document 2).

In this structure, the wire harness 56 is routed in the seat of the automobile, the wire harness 56 is branched along the seat 57 and the backrest 58 of the seat frame, and each branch line 56a is placed on the reclining mechanism 59 on the back side and the seat side. The sheet storage mechanism 60 is connected.
Japanese Utility Model Publication No. 6-50931 (FIG. 2) Japanese Patent Laying-Open No. 2004-255975 (FIG. 2)

  However, in the conventional harness routing structure of FIG. 7, the wire harness 55 is limited to a flat shape in order to allow the wire harness 55 to be inserted into the narrow harness support groove 53. There is a problem that it is difficult to apply to a multi-pole harness, a problem that bending of the wire harness 55 is concentrated at one point of the hinge shaft 52, and that the wire is easily broken due to bending fatigue, and the hinge shaft 52 Further, there is a concern that the strength of the hinge shaft 52 may decrease due to the notch formation of the harness support groove 53.

  Moreover, in the harness wiring structure of the form as shown in FIG. 8, when wiring a plurality of electric wires on the backrest side, for example, as shown in FIGS. 9 (a) to 9 (c), the backrest 62 is provided. Since the wire harness 63 needs to have a certain amount of slack 63a between the backrest 62 and the seat portion 61, the space for the slack 63a is required to largely tilt (rotate) back and forth. There is a concern that the slack portion 63a may be damaged by interference with the outside or an occupant or the like, or the slack portion 63a may be bent repeatedly at a small angle (the state of FIG. 9C), which may cause bending fatigue.

  In view of the above points, the present invention provides a wire harness composed of a plurality of insulation-coated wires in a relatively rotating structure such as an automobile door or seat without causing interference with the outside or bending fatigue. It aims at providing the harness wiring structure which can be wired by space saving.

In order to achieve the above object, in the harness routing structure according to claim 1 of the present invention , a rotating body is rotatably connected to a base body by a hinge shaft, and a wire harness is routed from the base body to the rotating body. In the harness routing structure, an intermediate portion of the wire harness is routed along the hinge shaft and held in a circumferentially rotatable manner by a clamp, and an annular portion connected to the clamp is engaged with the hinge shaft. In addition, the dividing surface of the clamp is formed in an inclined shape, and the inclination direction of the dividing surface is set opposite to the inclination direction of the cut end of the protective tube on the outer periphery of the wire harness .

With the above structure, the wire harness is bent along the base body or et hinge axis, to not parallel to the hinge axis located in a space-saving substantially parallel, is routed bent toward the rotating member from the hinge axis The When the rotating body rotates, the intermediate portion of the wire harness is supported by the clamp and twisted in the circumferential direction in a state of being parallel or substantially parallel along the hinge axis, and the position of the intermediate portion does not change. As a result, the wire harness is not slackened, and interference with the outside and bending fatigue due to the slack are prevented. As an example, a seat portion of an automobile seat may be used as a base, and a backrest may be used as a rotating portion.

Further, the twisting operation of the intermediate portion of the wire harness during the rotation of the rotating body is smoothly performed, and the twist is smoothly absorbed over the entire length of the intermediate portion. Thus, the rotational operation of the rotating body is Ru performed smoothly with a small force.

Harness routing structure according to claim 2 is the harness wiring structure according to claim 1, wherein the substrate and / or the wire harness in the rotating body is held freely circumferentially pivoted other clamping said other The divided surface of the clamp is formed in an inclined shape, and the inclined direction of the divided surface is set opposite to the inclined direction of the cut end of the protective tube on the outer periphery of the wire harness .

  With the above configuration, when the rotating body is largely rotated, the intermediate part of the wire harness is twisted and the harness part following the intermediate part is twisted, but the other clamp supports the harness part so that it can rotate in the circumferential direction. By doing so, the twist is smoothly and reliably absorbed. The twisting direction of the wire harness is opposite between when the rotating body is rotated forward and when it is rotated backward. By supporting the wire harness in a circumferentially rotatable manner with the intermediate clamp and at least the clamp in the base body or the rotating body, the torsion over the entire length of the wire harness is absorbed.

  With the above configuration, when the protective tube of the wire harness is rotated in the circumferential direction in the clamp, the cut tube for inserting the protective tube and the split surface of the clamp are inclined in opposite directions. Is not caught on the split surface of the clamp, the protective tube is smoothly and reliably rotated, and the twist of the wire harness (protective tube) is absorbed smoothly and reliably. The electric wires in the protective tube are safely protected without being twisted and twisted. This clamp structure is applicable to each clamp that supports the intermediate portion of the wire harness and the harness portions before and after the wire harness.

As described above, according to the invention of claim 1, positioned along the intermediate portion hinge axis of the wire harness during rotation of the rotating body, there is no necessity to protrude to the outside, interference and loosening of the external Bending fatigue or the like of the portion is prevented, and the reliability of power supply of the wire harness is improved. In addition, since the intermediate portion of the wire harness can be routed along the hinge axis in a space-saving manner, the space occupied by the wire harness in a rotating structure such as an automobile seat can be reduced, and other components can be arranged. The degree of freedom is expanded.

Further, the twist of the intermediate portion of the wire harness during the rotation of the rotating body is absorbed, and damage (torsional fatigue) of the intermediate portion is prevented, and the rotating operability of the rotating body is improved.
In addition, by connecting the intermediate portion of the wire harness to the hinge shaft at the annular portion and defining the position of the intermediate portion to be constant, loosening of the wire harness can be more reliably prevented.
In addition, since the cut end of the protective tube and the split surface of the clamp rotate smoothly without being caught when the protective tube on the outer periphery of the wire harness rotates, the twist of the wire harness is absorbed smoothly and reliably.

According to the invention described in claim 2, for example, the twist of the wire harness when the rotating body is largely rotated is reliably absorbed, and the effect of the invention described in claim 1 is promoted.
In addition, since the cut end of the protective tube and the split surface of the clamp rotate smoothly without being caught when the protective tube on the outer periphery of the wire harness rotates, the twist of the wire harness is absorbed smoothly and reliably.

  1 to 2 show an embodiment of a harness routing structure according to the present invention.

  In this harness routing structure, a seat (base) 1 is provided with a backrest (rotating body) 2 that can be rotated (reclined) by a horizontal hinge shaft 3 as a seat of an automobile, and the wire harness 4 is backrested from the seat 1. 2, the intermediate portion 5 of the wire harness 4 is routed in parallel along the hinge shaft 3, and the intermediate portion 5 is fixed (supported) to the hinge shaft 3 by the clamp 8. The front and rear harness portions 6 and 7 are fixed to the seat portion 1 and the backrest 2 by other clamps 9 and 10, respectively.

  The intermediate clamp 8 includes one annular portion 11 that fixes the hinge shaft 3 and the other annular portion 12 that rotatably holds the corrugated tube 15 on the outer periphery of the wire harness 4 in the circumferential direction. , 12 are connected together directly or via a short plate-like connecting portion 13 (FIG. 2).

  At least both the annular portions 11 and 12 are formed in a divided manner, and each pair of divided annular portions (represented by reference numerals 11 and 12) is a locking means (not shown) such as a locking claw or a locking frame piece or a tap screw. They are fixed to each other by fixing means 14 (FIG. 2). One annular portion 11 is fixedly fixed to the hinge shaft 3, and the other annular portion 12 holds the corrugated tube 15 so as to be rotatable in the circumferential direction. An annular rib (not shown) on the inner surface side of the annular portion 12 is slidably engaged with the circumferential groove 16 of the corrugated tube 15. This structure is the same in the front and rear clamps 9 and 10 (details will be described later).

  The corrugated tube 15 (FIG. 2) is an existing one, and is formed of a synthetic resin as a material so as to be able to bend with circular circumferential grooves 16 and ridges 17 alternately. A wire (not shown) can be inserted. The wire harness 4 is configured by inserting an electric wire through the corrugated tube 15. In this state, the wire harness 4 is fixed to the seat frame 19 with the clamps 8 to 10.

  The harness portion 6 on the front side of the wire harness 4 is connected to an auxiliary machine such as a motor for raising and lowering the seat portion and a power-side wire harness (not shown) in the seat portion 1, and the harness portion 7 on the rear side of the wire harness 4. Is connected to an auxiliary machine such as a reclining motor or an occupant detection sensor on the backrest 2 side. The wire harness on the power supply side or the extension of the harness portion 6 on the seat side is connected to the power supply side via a surplus length absorber on the floor side (for example, the wire harness is bent in a U-shape in the case to be stretchable). Preferably it continues.

  The seat portion 1 and the backrest 2 are formed of a metal plate, the hinge shaft 3 is formed of a metal round bar, and these 1 to 3 constitute a seat frame 19, and the seat frame 19 together with the wire harness 4 and the clamps 9 to 11 A seat is formed by being covered with a cushion, an outer skin or the like (not shown). The hinge shaft 3 does not rotate in the circumferential direction, and the backrest 2 rotates independently with respect to the fixed hinge shaft 3.

  The wire harness 4 is routed horizontally from the front to the back along the upper surface of the seat portion 1, bent laterally while passing under the hinge shaft 3, and horizontally in the axial direction along the rear surface side of the hinge shaft 3. Moreover, it is routed short, bent upward, and routed along the front surface of the backrest 2. The intermediate portion 5 of the wire harness 4 is fixed to the hinge shaft 3 by a clamp 8 at a substantially central portion in the longitudinal direction. The intermediate portion 5 is located in a space-saving manner along a space 20 that penetrates between the seat portion 1 and the backrest 2 in the front-rear direction.

  The wire harness 4 has a first lateral bent portion 21 (FIG. 2) from the seat portion 1 to the hinge shaft 3, and an upward second bent portion 22 from the hinge shaft 3 to the backrest 2. A harness intermediate portion 5 along the hinge shaft 3 is formed between the two bent portions 21 and 22. The intermediate portion 5 is a so-called extra length portion, and is located in a space-saving manner in parallel with the hinge shaft 3 and is housed inside the cushion material of the seat, so that the seat portion 1 and the backrest 2 are conventionally provided. It does not jump out rearward from the gap 20 between them, and the extra length portion is reliably prevented from interfering with the outside, an occupant or the like.

  The wiring harness 4 is routed close to the surfaces 1a and 1b of the seat portion 1 and the backrest 2, and the intermediate portion 5 of the wire harness 4 is routed on the rear surface side of the hinge shaft 3, so that the backrest 2 is When it is largely tilted back and forth, the bending operation of the second bent portion 22 (FIG. 2) of the wire harness 4 is smoothly performed without difficulty.

  At least one of the front and rear clamps 9 and 10 preferably holds the corrugated tube 15 so as to be rotatable. Both the front and rear clamps 9 and 10 may hold the corrugated tube rotatably. The intermediate clamp 8 holds the wire harness 4 in a freely rotatable manner. The front and rear clamps 9 and 10 are disposed relatively close to the hinge shaft 3.

  An intermediate portion of the wire harness 4 while the backrest-side harness portion 7 is tilted forward integrally with the backrest 2 by tilting the backrest 2 forward from the standard position of the backrest 2 of the seat in FIG. 5 rotates behind the hinge shaft 3 in the annular portion 12 of the clamp 8 in the circumferential direction to absorb the torsion, and further, the wire harness 4 goes in the circumferential direction in the clamps 9 and 10 on the seat side and / or the backrest side. The twist is reliably absorbed over the entire length. Further, as the backrest 2 is rotated backward from the state where the backrest 2 is tilted forward, the wire harness 4 rotates within the clamps 8 to 10 in the circumferential direction opposite to the above to absorb the twist.

  In this way, the seat-side clamp 9 and the hinge shaft-side clamp 8 support the wire harness 4 in a circumferentially rotatable manner, and / or the hinge shaft-side clamp 8 and the backrest-side clamp 10. By supporting the wire harness 4 so as to be rotatable in the circumferential direction, the twist of the corrugated tube 15 is smoothly absorbed during the reclining operation of the backrest 2 or when the backrest 2 is largely tilted, and the reclining operation or the operation of tilting the backrest 2 large Is performed smoothly with little force and without resistance, and breakage due to twisting of the corrugated tube 15 and opening of the slit-shaped cut end for inserting the wire into the corrugated tube 15 are prevented. The wire is safely protected without twisting in the corrugated tube.

  When the hinge shaft 3 is of a pivoting type, one annular portion 11 of the intermediate clamp 8 is engaged (supported) with the hinge shaft 3 so as to be rotatable in the circumferential direction, and the intermediate portion 5 of the wire harness 4 is supported. The position of the other annular portion 12 is always constant. Alternatively, the wire harness 4 is held movably in the longitudinal direction by the clamps 9 and 10 on the seat portion side and the backrest side so that the wire harness 4 may be pulled in the longitudinal direction as the hinge shaft 3 rotates.

  FIG. 3 shows an embodiment of the clamps 9 and 10 that rotatably support the corrugated tube 15. The annular portion 12 of the intermediate clamp 8 in FIG. 1 has the same internal structure.

  The clamp 9 (10) is formed in two in the radial direction of the corrugated tube 15, and both the divided clamps 23, 24 have a plurality of semi-annular ribs 26 on the inner peripheral surface 25 at equal pitches. The inner diameter of the inner peripheral surface 25 when both the split clamps 23 and 24 are joined is set to be slightly larger than the outer diameter of the protrusion 17 that is the outer peripheral surface of the corrugated tube 15, and the inner diameter of the inner peripheral surface of the rib 26 is set. Is set to be slightly larger than the valley diameter of the circumferential groove 16 of the corrugated tube 15, and the thickness of the rib 26 is set to be slightly smaller than the inner width of the circumferential groove 16.

  Both split clamps 23 and 24 are connected to each other by a thin-walled hinge 27. On the side opposite to the hinge 27, a locking claw 28 projects from one rotary-side split clamp 24, and the other fixed-side split clamp. 23 is provided with a flexible locking frame piece 29 for engaging with the locking claw 28, and at the bottom of the other split clamp 23, holes (not shown) of the seat portion 1 and the backrest 2 of FIG. A locking clip 30 is provided in a protruding manner.

  The locking clip 30 is an existing one provided with a pair of flexible locking claws 32 at the tip of the support plate 31. Further, the clamp 9 that holds the corrugated tube 15 so as to be rotatable is known, for example, to hold a wire harness in the vehicle body. The split clamps 23 and 24 may be completely split without being connected by the thin hinge 27, and the split clamps may be locked to each other by the locking means 28 and 29 on both sides. In addition to the above, various locking means such as a locking protrusion and a locking recess can be used as required.

  When the corrugated tube 15 is not held rotatably, the diameter of the inner peripheral surface 25 of the divided clamps 23 and 24 is slightly smaller than the outer diameter of the corrugated tube 15, and the corrugated tube 15 is held by both the divided clamps 23 and 24. Fix it in a stationary manner.

  FIGS. 4-6 shows other embodiment of the clamp which supports the corrugated tube 15 so that rotation is possible. The annular portion 12 of the intermediate clamp 8 in FIG. 1 has the same internal structure (excluding the locking clip).

  In this clamp 9 '(10'), the split surfaces (joint surfaces) 33, 34 of both split clamps 23, 24 are inclined surfaces, and the slit-shaped cut 35 (FIG. 5) of the corrugated tube 15 is split into the split clamps 23, 24. The inclined surfaces 33 and 34 are inclined in the opposite direction (the divided surfaces 33 and 34 are inclined in the opposite direction to the inclined surface 36 of the cut surface 35 of the corrugated tube 15). .

  With this structure, when the corrugated tube 15 having a circular cross section rotates in the circumferential direction, the cut surface 35 of the corrugated tube 15 rotates smoothly without being caught by the split surfaces 33 and 34 of the clamp 9 ′ (10 ′). . This effect is exhibited when the corrugated tube 15 is rotated in either the clockwise direction or the counterclockwise direction.

  As shown in FIG. 5, the cut end 35 of the corrugated tube 15 is opened as shown by a chain line 15a, and a plurality of insulated coated electric wires 37 are inserted into the inner space 18, and the locking claws 28 and the locking claws 28 are locked while joining the two divided clamps 23 and 24. They are locked to each other by a locking means such as a frame piece 29. FIG. 6 shows a state in which there is a gap 38 immediately before joining. Simultaneously with the joining of both split clamps 23 and 24, the circumferential groove 16 of the corrugated tube 15 is supported by the ribs 26 so as to be rotatable in the circumferential direction.

  It is preferable that the cut end 35 of the corrugated tube 15 is closed without a gap by a restoring force in the circumferential direction. The left and right dividing surfaces 33 and 34 of the clamp 9 '(10') are preferably inclined at the same inclination angle. The clamp 9 ′ (10 ′) is locked to the seat 1 and / or the backrest 2 (FIG. 1) by the locking clip 30 while holding the wire harness 4.

  In the above embodiment, the clamps 9 and 10 are fixed to the mounting side (the seat portion 1 and the backrest 2) with the locking clips 30, but the clamps are fixed with bolts or bands instead of the locking clips 30. Is also possible. In the above embodiment, the clamps 8 to 10 are divided. However, for example, when the wire harness 4 is inserted into the clamp in the axial direction, the clamps 8 to 10 may be non-divided. In this case, the corrugated tube 15 cannot be positioned by the ribs 26 in the longitudinal direction, and is simply supported so as to be rotatable in the circumferential direction.

  In addition, when a corrugated tube having an oval cross section or a flat shape is used instead of the corrugated tube 15 having a circular cross section, a split-type rotating member (not shown) whose inner circumference is circular or flat and whose outer circumference is circular is used. The corrugated tube is rotatably held by a clamp similar to the above (similar).

  When a net tube, a flexible urethane tube, a thin resin tube, or the like is used as the protective tube instead of the corrugated tube 15, the protective tube is sandwiched between annular rotating members (not shown) and rotated. It is also possible to hold the moving member rotatably with the same (similar) clamp as described above. In the clamp 9 ′ (10 ′) of FIGS. 4 to 6, another protective tube having an inclined cut surface may be used instead of the corrugated tube 15.

  Further, in FIG. 1, the wire harness portion 6 on the seat portion side is routed through the lower side of the hinge shaft 3. For example, when the hinge shaft 3 is close to the upper surface 1 a of the seat portion 1, It is also possible to route the wire harness 4 on the upper side and support the intermediate portion 5 of the wire harness 4 with the clamp 8 behind the hinge shaft 3.

  Moreover, in the said embodiment, although the example applied to the seat of the motor vehicle was shown, it is also possible to apply the said harness wiring structure in the vertical hinge axis | shaft of the front door of a motor vehicle, for example. In this case, the front clamp 9 is fixed to the vehicle body side, the rear clamp 10 is fixed to the door side, the front and rear portions 6 and 7 of the wire harness 4 are routed horizontally, and the intermediate portion 5 is a hinge shaft. Is routed vertically along. In addition, the harness wiring structure can be applied not only to the front door but also to a back door or a bonnet having a hinge shaft.

It is a perspective view which shows one Embodiment of the harness wiring structure which concerns on this invention. It is a perspective view which shows the principal part of a harness wiring structure similarly. It is a disassembled perspective view which shows one form of the clamp holding a corrugated tube. It is a disassembled perspective view which shows the other form of a clamp. It is a front view which shows the state which similarly holds a wire harness with a clamp. It is a front view showing a state just before holding a wire harness with a clamp. It is a perspective view which shows one form of the conventional harness wiring structure. It is a perspective view which shows the other form of the conventional harness wiring structure. (A)-(c) is a side view which shows the effect | action of the conventional harness wiring structure.

Explanation of symbols

1 Seat (base)
2 Backrest (rotating body)
3 Hinge shaft 4 Wire harness 5 Intermediate part 8-10, 9'-10 'Clamp 11, 12 Annular part 15 Corrugated tube (protective tube)
33, 34 Dividing surface 35 Cut surface

Claims (2)

In a harness routing structure in which a rotating body is rotatably connected to a base body by a hinge shaft, and a wire harness is routed from the base body to the rotating body, an intermediate portion of the wire harness is routed along the hinge axis And an annular portion connected to the clamp engages with the hinge shaft, and the split surface of the clamp is formed in an inclined shape. A harness routing structure characterized in that it is set in the direction opposite to the inclination direction of the cut end of the protective tube on the outer periphery of the wire harness. In the base body and / or the rotating body, the wire harness is rotatably held in a circumferential direction by another clamp, a split surface of the other clamp is formed in an inclined shape, and the tilt direction of the split surface is the wire harness. The harness routing structure according to claim 1 , wherein the harness routing structure is set to be opposite to the inclination direction of the cut end of the protective tube on the outer periphery of the wire.

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