JPH0716524Y2 - Flexible shaft connection structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a connecting structure for a flexible shaft.

[Prior Art] When the drive means such as a motor and the rotary shaft which is rotated by its drive force are separated from each other and the connecting path is not straight, a flexible shaft having one end formed in a quadrangular prism shape is usually used. There is.

Therefore, as shown in FIG. 15, it is necessary to form the square hole 208 in the one end portion 202 of the rotary shaft 200 so that the one end portion 206 of the flexible shaft 204 can be fitted therein.

However, in order to form the square hole 208 in the rotary shaft 200 made of metal, the square hole 208 must be formed by electric discharge machining. However, when the square holes 208 are formed by electric discharge machining, the machining time is long, so that mass productivity is poor and there is a problem in terms of accuracy.

Therefore, it is conceivable that a resin member (not shown) in which the square hole 208 is easily processed is fixed to the one end portion 202 of the rotating shaft 200 and connected to the flexible shaft 204.

However, since a large torque is applied to the resin member by the rotation of the flexible shaft 204, the resin member may be thermally deformed, and there is a problem that the rotation of the flexible shaft 204 cannot be sufficiently transmitted to the rotating shaft 200. .

[Problems to be Solved by the Invention] In view of the above facts, an object of the present invention is to provide a flexible shaft connecting structure capable of reliably transmitting a rotational force from a driving means to a rotary shaft with a simple structure. Is.

[Means for Solving the Problems] The present invention provides a structure in which a flexible shaft having a rectangular shaft portion provided in a connecting portion and a rotating shaft are connected to each other. Two fitting pieces are provided by providing a notched groove so as to divide into two, and a connecting member is provided between the rotary shaft and the flexible shaft, and a through hole having a semicircular cross section is formed in the connecting member. Two pieces are provided so as to face each other so that the fitting piece can be fitted, and on the side of the connecting member facing the flexible shaft, a square hole that connects the two through holes is provided up to a longitudinal intermediate portion. The shaft part of the shaft is designed to fit.

[Operation] A fitting piece is formed on the rotation shaft by providing the notch groove on the rotation shaft, and the fitting piece is fitted into the hole of the connecting member, and the flexible shaft is sandwiched between the fitting pieces. By inserting the rectangular shaft portion into the square hole of the connecting member, the rotational force of the flexible shaft can be reliably transmitted to the rotating shaft.

[Embodiment] FIGS. 1 to 14 show an embodiment of a flexible shaft connecting structure according to the present invention. The arrows in the figure
FR indicates the forward direction of the vehicle, and arrow UP indicates the upward direction.

FIG. 13 shows a seat belt device to which the height adjuster 10 of the shoulder anchor is applied.

The occupant 14 seated on the seat 12 is equipped with a webbing 16.

One end of the webbing 16 is engaged with a lower portion of the vehicle side wall 20 by an anchor plate 18, and a tongue plate 22 is slidably attached to an intermediate portion in the longitudinal direction of the webbing 16. The tongue plate 22 is engageable with a baggage device 24 provided upright in the substantially central portion of the vehicle.

The webbing 16 is attached to the upper portion of the vehicle side wall 20 of the slip joint 26 which folds back and supports the longitudinal middle portion of the webbing 16 by an anchor bolt 28 so as to be rotatable in the vehicle longitudinal direction.

As shown in FIG. 13, the shoulder anchor height adjusting device 10 is arranged above the vehicle side wall 20 and covered with the slide garnish 30.

As shown in FIG. 1, the intermediate portion of the vehicle side wall 20 shown in FIG. 13 has a rising portion 32A and a flange portion 32B on the vehicle rear side, and a rising portion 32C and a flange portion 32D on the vehicle front side. A frame 32 having a C-shaped cross section is fixed.

As shown in FIG. 1, holes 34 and 36 are formed at both longitudinal ends of the frame 32, respectively.

Then, the sub plate 38 is bolted to the upper part of the frame 32.
It is designed to be fastened by 40. The sub plate
A projecting piece 42 projecting toward the vehicle interior is formed at the lower end of the vehicle 38, and a hole 44 is formed in the projecting piece 42.

Further, as shown in FIG. 1, a through hole 46 is formed in the rising portion 32A and the flange portion 32B on the vehicle rear side of the frame 32, and a through hole 48 is formed in the lower rising portion 32A. As shown in FIG. 4 and FIG. 5, a recess 32E is formed at the lower end of the through hole 46 and is projected toward the front side of the vehicle.

A sub plate 50 is fastened to the lower portion of the frame 32 together with bolts 52. A projecting piece 54 projecting toward the vehicle interior is formed on the upper end of the sub plate 50.
A hole 56 is formed in 54. Further, a projecting portion 58 is formed on the vehicle rear side of the projecting piece 54, and a projecting portion 60 is also formed on the vehicle rear side of the sub plate 50. As shown in FIGS. 4 and 5, the protrusion 58 of the sub plate 50 is fitted in the through hole 46 of the frame 32, and the protrusion 60 of the sub plate 50 is fitted in the through hole 48 of the frame 32. Has become.

As shown in FIG. 1, the frame 32 is provided with a feed screw shaft 62 along the longitudinal direction thereof. A male screw 64 is engraved in the middle of the feed screw shaft 62. Then, the upper end portion 66 of the feed screw shaft 62 is fitted into the hole 44 of the sub plate 38, and the lower end portion 68 of the feed screw shaft 62 is fitted into the hole 56 of the sub plate 50, so that the feed screw shaft 62 is fitted to the frame 32.
It is designed to be rotatably attached to.

Further, as shown in FIG. 6, a slit 70 is formed on the lower end portion 68 of the feed screw shaft 62 in the longitudinal direction. For this reason, fitting pieces 68A, 68A are formed on the lower end 68, and the fitting pieces 68A, 68A are formed.
A and 68A are made of resin and fit into a cylindrical joint 72. That is, two holes 74 having a semicircular cross section are formed in the longitudinal direction in the joint 72 as shown in FIGS. 6 and 7, and the fitting pieces 68A, 68A of the feed screw shaft 62 are formed in the holes 74, 74.
Is designed to fit in. Further, as shown in FIG. 6, a rectangular square hole 76 is formed on the flexible shaft 80 side of the joint 72 so as to connect the two holes 74. An upper end portion 81 of a flexible shaft 80 having a tube 78 inserted and penetrated is fitted into the square hole 76. The upper end portion 81 is formed in a square pole.

The lower end of the flexible shaft 80 is connected to a motor (not shown), and the flexible shaft 80 and the joint
The feed screw shaft 62 is rotated via 72.

As shown in FIG. 1, a slider 82 having a substantially cubic shape is screwed onto the feed screw shaft 62 so as to be vertically movable.

A hole 83 into which an anchor bolt 28 that rotatably pivots a stamp joint 26 that folds and supports the webbing 16 is inserted is formed on the inside of the slider 82 inside the vehicle.

A hole 84 is formed in the vertical direction of the rear part of the vehicle of the slider 82,
A female screw 85 is engraved in the hole 84. As shown in FIG. 10, a protrusion 88 is formed in the up-down direction on the vehicle rear side of the vehicle interior of the slider 82. Further, a notch 90 having a U-shaped cross section is formed on the vehicle front side of the slider 82. Then, as shown in FIG. 10, the tongue piece 91 on the vehicle interior side of the notch 90 is formed.
Is extended long in front of the vehicle.

The cutout 90 is made of resin 92 shown in FIG.
Are designed to fit together. A groove portion 94, which is substantially L-shaped in a plan view, is formed on the shoe 92 in the vertical direction.
The flange portion 32D of the frame 32 is fitted into 94. The lever portion 95 of the shoe 92 protruding from the frame 32 toward the vehicle front side is fitted with the lever 99 of the variable resistor 97 attached to the vehicle front side of the frame 32 by a bracket. A rectangular notch 82A is formed in the upper portion of the slider 82 on the vehicle interior side, and a hole 82B is formed in the lower portion.

As shown in FIGS. 2 and 3, a leaf spring 96 is attached between the outer side of the vehicle body of the slider 82 and the frame 32.
The lower part of 82 is urged toward the inside of the vehicle. A resin-made sub shoe 100 is fixed to the lower portion of the protruding piece 98 formed in the central portion of the leaf spring 96.

As shown in FIG. 11, a slide garnish 30 is attached to the central portion of the slider 82 on the vehicle interior side. As shown in FIG. 11, on the back side 30A of the slide garnish 30, an anchor bolt hole 102 formed in the slide garnish 30 is sandwiched and a projection 104 having a rectangular shape in a front view is provided above.
Are formed. A rib 106 is formed on the protrusion 104 in the vehicle front-rear direction. Below the anchor bolt hole 102, as shown in FIG. 11 and FIG. 12, a substantially cylindrical slit is formed and a projection 108 having an enlarged upper portion is formed. Vertical ribs 110 are also formed on the protrusions 108 in the vehicle front-rear direction.

The protrusion 104 is fitted in the notch 82A formed in the upper portion of the slider 82, and the protrusion 108 is fitted in the hole 82B formed in the lower portion of the slider 82. Further, at that time, the ribs 106 and 110 are configured to abut on the inside of the slider 82 in the vehicle interior.

Next, the operation of the embodiment will be described.

Now, the occupant 14 seated on the seat 12 turns on a switch (not shown) of a motor (not shown) in order to lower the slider 82 in order to make the shoulder webbing most suitable for his physique.

Then, the flexible shaft 80 connected to the motor rotates, and the joint 72 with which the upper end 81 of the flexible shaft 80 is fitted rotates as the flexible shaft 80 rotates. Therefore, the mating piece 68 of the feed screw shaft 62 is
Since A and 68A are also fitted in the holes 74 and 74 of the joint 72, the feed screw shaft 62 also rotates. In this case, since the fitting pieces 68A, 68A of the feed screw shaft 62 are housed in the joint 72 as shown in FIGS. 8 and 9, the slit 70 does not expand. Therefore, the rotational force from the flexible shaft 80 can be efficiently transmitted to the feed screw shaft 62. As shown in FIG. 8, since the square hole 76 of the joint 72 does not penetrate in the longitudinal direction, the tip of the upper end portion 81 of the flexible shaft 80 is restricted by the joint 72. And
As the feed screw shaft 62 rotates, the slider 82
It is guided by 32 and begins to descend.

When the slider 82 descends, as shown in FIG. 2, a downward tension acts on the webbing 16 due to the retracting force of the retractor and the belt pulling force due to the movement of the occupant 14, so that the slider 82 is indicated by an arrow. The indicated moment M acts.

However, since the leaf spring 96 for urging the lower portion of the slider 82 toward the vehicle interior side is disposed below the slider 82, the slider 82 is urged toward the vehicle interior side, so that the moment M
The slider 82 does not tilt with respect to the feed screw shaft 62 and the female screw 85 formed in the hole 84 of the slider 82
And the male screw 64 formed on the feed screw shaft 62 abut.

For this reason, the contact between the thread surface of the male screw 64 and the thread surface of the female screw 85 becomes unbearable, and the generation of noise can be prevented. Also,
The leaf spring 96 slides on the frame 32, but the frame 32 and the leaf spring
Since the resin-made sub shoe 100 is arranged at the contact portion with 96, no contact noise is generated by sliding of the sub shoe 100.

Further, even when a load in the direction of arrow A in FIG. 4 is applied to the feed screw shaft 62 via the webbing 16 and the slip joint 26 in a vehicle emergency, the sub plate that supports the feed screw shaft 62.
The projecting portions 58 and 60 of 50 are fitted in through holes 46 and 48 formed in the upright surface 32A of the frame 32, respectively. Moreover, the protruding portion 58
Since it is supported by the lower end edge of the through hole 46 approaching in the direction of the feed screw shaft 62, the moment acting on the sub plate 50 can be reduced, and the load is distributed to the through holes 46, 48 and the bolt 52, The sub plate 50 can be reliably supported.

Further, even if a load is applied in the direction of the arrow shown in FIG. 10 in the event of a vehicle emergency, the load is applied to the vicinity of the base of the flange 32B of the frame 32 by the protruding portion 88 of the slider 82, so that the flange 32B does not turn up toward the vehicle interior. To prevent. In addition, the slider
Since the tongue piece 91 of 82 is also extended to the front side of the vehicle for a long time, the flange portion 32D is prevented from flipping up to the vehicle interior side.

When the slide garnish 30 is fixed to the slider 82, the projection 104 of the slide garnish 30 is attached to the slider 8
When the projections 108 are fitted into the two notches 82A in the holes 82, respectively, the slide garnish 30 is securely fixed to the slider 82, so that the slide garnish 30 can be easily attached later.

Further, since the ribs 106 and 108 contact the inner surface of the slider 82 in the vehicle interior, the slide garnish 30 does not rattle.

The variable resistor 97 may be separately mounted on the driver's side and the limit switch 122 shown in FIG. 14 on the passenger's side.
Further, the variable resistor 97 may be attached to both the driver seat side and the passenger seat side, and the limit switch 12 may be attached to both the driver seat side and the passenger seat side.

[Advantages of the Invention] Since the present invention has the above-described configuration, since the rectangular shaft portion of the flexible shaft is fitted to the connecting member while being sandwiched between the fitting pieces of the rotating joint, the connecting member is not deformed by heat. This has the effect of transmitting the rotational force of the flexible shaft to the rotary shaft without raising it.

Further, since the rectangular shaft portion of the flexible shaft is accommodated in the cutout groove of the rotating shaft, the flexible shaft and the rotating shaft overlap with each other, so that the length of the flexible shaft connecting structure can be shortened. Have.

Further, by using the connecting member, it is only necessary to perform a simple working operation on the rotary shaft, which has the effect of improving work efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 14 show an embodiment of a flexible shaft connecting structure in the present invention. FIG. 1 is an exploded perspective view of a shoulder anchor height adjusting device, and FIG. 2 is a shoulder anchor height. FIG. 3 is a side view of the adjusting device, FIG. 3 is a cross-sectional view of the frame and slider, FIG. 4 is a front view of the lower part of the shoulder anchor height adjusting device, and FIG. 5 is a cross-sectional view taken along the line V-V of FIG. Fig. 6 is an explanatory view of the attachment operation of the joint, and Fig. 7 is VII-VII of Fig. 6.
FIG. 8 is a vertical cross-sectional view of the joint with the feed screw shaft and the flexible shaft connected, and FIG.
Fig. 10 is a cross-sectional view taken along the line IX-IX of Fig. 10, Fig. 10 is a cross-sectional view of the height adjustment device for the shoulder anchor, Fig. 11 is an explanatory view of mounting the slide garnish, and Fig. 12 is a bottom face of the slider and the slide garnish. Fig. 13 is an overall view of the seat belt device, Fig. 14
FIG. 15 is a perspective view of a limit switch attached to the height adjustment device of the shoulder anchor, and FIG. 15 is a conventional example of a flexible shaft connecting structure. 62 …… Feed screw shaft (rotating shaft), 68A …… Mating piece, 70 ……
Slip (notched groove), 72 ... Joint (connecting member),
74 ... Through hole, 76 ... Square hole, 80 ... Flexible shaft.

Claims (1)

[Scope of utility model registration request] 1. A connecting structure of a flexible shaft having a rectangular shaft portion provided in a connecting portion and a rotating shaft, wherein a notch groove is formed at one end of the rotating shaft so as to divide the rotating shaft into two diametrical directions. By providing two fitting pieces, a connecting member is provided between the rotary shaft and the flexible shaft, and two through holes having a semicircular cross section are provided facing each other in the connecting member. The fitting piece is made fittable, and the rectangular shaft portion of the flexible shaft is fitted on the side opposite to the flexible shaft of the connecting member by providing a rectangular hole communicating the two through holes up to the intermediate portion in the longitudinal direction. Flexible shaft connection structure that is made possible.