JP2008125533A - Winch device of wheelchair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winch device of a wheelchair which prevents a slack of a traction member used for pulling a wheelchair when loading or unloading a wheelchair onto or from a vehicle. <P>SOLUTION: The winch device of a wheelchair comprises a traction member 14, a reel 22 for winding and feeding the traction member 14, a reel energizing means 27 for energizing the reel 22 in the winding direction, and a drive force transmitting mechanism for transmitting movement of a motor to the reel 22. The drive force transmitting mechanism has a drive side rotary member 50 connected to the motor, a reel side rotary member 31 connected to the reel 22, and unidirectional rotation regulation mechanisms 40 and 49 which permit rotation of the reel side rotary member 31 in the winding direction but regulate its rotation in the feeding direction with respect to the drive side rotary member 50. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is provided in a vehicle equipped with a slope for getting on and off a wheelchair, and by rotating a reel of a traction member for a wheelchair in a winding direction or a feeding direction by a driving source, the wheelchair is raised along the slope, or The present invention relates to a winch device for a wheelchair to be lowered.

A technique related to the wheelchair winch device described above is disclosed in Patent Document 1.
This wheelchair winch device is a device provided in a vehicle equipped with a slope for getting on and off a wheelchair. A winch device for a wheelchair includes a belt having a connecting portion connectable to a wheelchair at a tip, a reel capable of winding and unwinding the belt, a spring material biasing the reel in a winding direction, and rotation of the motor. And a transmission mechanism for transmitting to the reel. Then, when the motor operates and the reel rotates in the winding direction in a state where the connecting portion of the belt is connected to the wheelchair, the belt is wound up and the wheelchair rises along the slope. When the reel is rotated in the feeding direction by the motor, the belt is drawn out and the wheelchair is lowered along the slope.

JP 2004-357879 A

However, in the wheelchair winch device described above, for example, when the wheelchair is lowered along the slope, the assistant slowly moves the wheelchair so that the lowering speed of the wheelchair is greater than the reel belt feeding speed (winch lowering speed). If it gets slower, the belt loosens.
Also, for example, when the wheelchair is lifted along the slope, if the assistant moves the empty wheelchair quickly, the wheelchair lift speed becomes faster than the reel belt winding speed (winch lift speed). Sag.
If the belt is loosened when the wheelchair is lifted or lowered, there is a possibility that the lifting and lowering operation of the wheelchair may be hindered due to the catch of the belt.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to prevent loosening of a pulling member that pulls the wheelchair when the wheelchair is lifted or lowered.

The above-described problems are solved by the inventions of the claims.
The invention of claim 1 is provided in a vehicle having a slope for getting on and off a wheelchair, and has a traction member having a connecting portion connectable to a wheelchair at a tip, a reel capable of winding and unwinding the traction member, and the reel. In a state where the reel urging means for urging in the winding direction, a drive source, and a drive force transmission mechanism for transmitting the operation of the drive source to the reel are connected to the wheelchair, The reel rotates in the take-up direction by the operation of the drive source in the take-up direction and the wheelchair rises the slope, and the operation of the drive source in the take-out direction rotates the reel in the take-out direction and the wheelchair A winch device for a wheelchair configured to descend on a slope, wherein the driving force transmission mechanism is connected to a driving side rotating member connected to the driving source side and the reel side. A one-sided rotation restricting mechanism configured to allow rotation in the winding direction of the reel-side rotating member relative to the driving-side rotating member, but to restrict rotation in the feeding direction. It is characterized by providing.

According to the present invention, by operating the one-way rotation restricting mechanism, the reel-side rotating member is allowed to rotate in the winding direction with respect to the driving-side rotating member, but the rotation in the feeding direction is restricted. For example, when the pulling member tries to loosen by slowly lowering the wheelchair while the driving source is operated in the feeding direction, the reel-side rotating member is moved against the driving-side rotating member by the force of the reel biasing means. Relatively rotates in the reel winding direction. For this reason, a reel and a reel side rotation member come to rotate according to the descent | fall speed of a wheelchair, and the slack of the traction member drawn | fed out from a reel can be prevented.
Also, for example, if the pulling member tries to loosen by the assistant raising the empty wheelchair quickly with the drive source operated in the winding direction, the reel-side rotating member is also driven by the force of the reel biasing means. The reel rotates relative to the side rotation member in the reel winding direction. For this reason, a reel and a reel side rotation member come to rotate according to the raising speed of a wheelchair, and the slack of the traction member wound up by a reel can be prevented.

According to the invention of claim 2, the one-way rotation restricting mechanism can be switched to a rotation restriction releasing state that allows the reel side rotating member to rotate in the winding direction and the feeding direction with respect to the driving side rotating member. To do.
For this reason, for example, when the traction member is pulled out from the reel before the wheelchair is put on the vehicle, the traction member can be pulled out from the reel at an arbitrary speed by switching the one-way rotation restriction mechanism to the rotation restriction release state. it can. As a result, the traction member can be quickly connected to the wheelchair.

  According to the invention of claim 3, the one-way rotation restricting mechanism can rotate integrally with one member of the drive side rotating member and the reel side rotating member and can move between the one-way rotation restricting position and the rotation restricting release position. And an intermediate member urging means for urging the intermediate member toward the one-direction rotation restricting position, and the other member of the drive side rotation member and the reel side rotation member, The intermediate member is provided with an engaging portion that overlaps with each other in the rotation direction when the intermediate member is at the one-way rotation restriction position and that does not overlap with each other in the rotation direction when the intermediate member is at the rotation restriction release position. The engaging portions are provided with engaging surfaces that engage with each other in the rotational direction with respect to the rotation of the reel-side rotating member with respect to the drive-side rotating member to rotate the members integrally. , Even before At least one of the engagement portions is in contact with the other engagement portion with respect to the rotation of the reel-side rotation member in the winding direction with respect to the drive-side rotation member, and the intermediate member is attached to the intermediate member. A guide surface for applying a force to move to the rotation restriction release position against the urging force of the urging means is provided.

According to the fourth aspect of the present invention, the intermediate member is moved to the rotation restriction release position against the urging force of the intermediate member urging means, and the one-way rotation restriction mechanism is wound around the drive side rotation member. A rotation restriction release mechanism for switching to a rotation restriction release state that allows rotation in the direction and the feeding direction is provided.
That is, the rotation restriction release mechanism switches the one-way rotation restriction mechanism to the rotation restriction release state so that the pulling member can be pulled out from the reel at an arbitrary speed.
According to the fifth aspect of the present invention, the engagement surface of the intermediate member and the engagement surface of the drive-side rotation member are applied to the pulling member in a state where a predetermined tension that is equal to or greater than the tension when the wheelchair descends on the slope due to gravity. Due to the frictional force, even if a force from the rotation restriction release mechanism to the rotation restriction release position acts on the intermediate member, the intermediate member does not move to the rotation restriction release position.
For this reason, even if the rotation restriction release mechanism operates due to an erroneous operation, the intermediate member does not move to the rotation restriction release position, and the rotation restriction in the feeding direction of the reel-side rotation member with respect to the drive-side rotation member is maintained. For this reason, even if the rotation restriction release mechanism is operated, the wheelchair does not naturally descend due to gravity during ascent and descent, and the safety of the wheelchair passenger can be ensured. When the rotation restriction release mechanism is operated, for example, when the assistant moves the wheelchair in the upward direction and tension is not applied to the traction member, the intermediate member moves to the rotation restriction release position, and the drive side rotation is performed. The restriction on the rotation of the reel-side rotating member in the feeding direction with respect to the member is released.

According to the invention of claim 6, before the rotation restriction release mechanism applies a force to the rotation restriction release position with respect to the intermediate member, the drive source is slightly rotated in the winding direction so that the predetermined tension acts on the traction member. It is characterized by that.
For this reason, when the rotation restriction release mechanism operates, a predetermined tension acts on the traction member, and a frictional force acts between the engagement surface of the intermediate member and the engagement surface of the drive side rotation member. And even if the force to the rotation restriction release position acts on the intermediate member from the rotation restriction release mechanism by the friction force, the intermediate member does not move to the rotation restriction release position. Therefore, the rotation restriction of the reel-side rotating member in the feeding direction with respect to the driving-side rotating member is maintained, and the wheelchair does not descend due to gravity during ascent and descent. Thereby, the safety of the wheelchair occupant is ensured.

  According to the present invention, it is possible to prevent slack of a pulling member that pulls a wheelchair when the wheelchair is lifted or lowered.

[Embodiment 1]
The wheelchair winch device according to the first embodiment of the present invention will be described below with reference to FIGS. The winch device for wheelchairs according to the present embodiment is a winch device provided in a vehicle equipped with a slope for wheelchairs, and FIG. 1 is a perspective view showing a use state of the winch device for wheelchairs. 2 is a longitudinal sectional view of the winch body of the wheelchair winch device, FIG. 3 is a sectional view taken along arrows III-III in FIG. 2, and FIGS. 4 to 6 are plan sectional views showing the operation of the intermediate member. FIG. 7 is a wiring block diagram of the wheelchair winch device, and FIG. 8 is a flowchart showing a part of the operation of the wheelchair winch device.
In the drawing, front and rear, right and left, and up and down correspond to front and rear, left and right, and top and bottom of the vehicle.

<About whole structure of wheelchair winch device 10>
The wheelchair winch device 10 is a winch installed in a vehicle 1 having a wheelchair slope 2 as shown in FIGS. 1 (A) and 1 (B), and when the wheelchair S is raised and lowered along the wheelchair slope 2. It is driven by the helper's operation. The wheelchair winch device 10 includes a pair of left and right winch bodies 20, a rectangular case 12 that accommodates the winch body 20, and a pair of left and right belts 14 that are wound or fed out by the winch body 20. At the tip of the belt 14, a connecting portion 14f that is hung on the frame of the wheelchair S is mounted. That is, the belt 14 corresponds to the pulling member of the present invention.
The vehicle 1 is a one-box type vehicle in which a rear opening 1k is opened by a rear door (not shown) jumping upward, and a flat floor surface 1f is formed in front of the rear opening 1k. In addition, a wheelchair slope 2 configured to be continuous with the floor surface 1f is connected to a lower end position of the rear opening 1k of the vehicle 1 so as to be rotatable up and down. As shown in FIG. 1, the wheelchair slope 2 can move between an unfolded position that is continuous with the floor surface 1 f of the vehicle 1 and a retracted position that stands in a folded state and is stored in the vehicle 1. It is configured. When the wheelchair slope 2 in the retracted state is deployed, the rear portion of the vehicle 1 is lowered by a certain height, and the inclination angle of the wheelchair slope 2 is adjusted to a predetermined angle.
A pair of winch main bodies 20 (only the case 12 is shown in FIG. 1) of the wheelchair winch device 10 are installed side by side in the vehicle width direction at the front end position of the floor surface 1f. An operation portion 17 of the wheelchair winch device 10 is provided on the inner wall surface of the vehicle 1 in the vicinity of the rear opening 1k. As shown in FIG. 7, the operation unit 17 includes a remote control oscillator 61 and a free switch 62 (described later).

<About the winch body 20>
The right and left winch bodies 20 have the same configuration, and are provided with a reel 22 for winding the belt 14 as shown in FIG. The reel 22 includes a cylindrical reel main body portion 22m and flange-shaped belt guide portions 22f provided at both axial ends of the reel main body portion 22m. A rotating shaft 23 is coaxially passed through the reel body portion 22m, and the reel body portion 22m is fixed to the rotating shaft 23 while being prevented from rotating.
The reel 22 is covered with a reel storage cover 25, and a pair of bearings 26 that rotatably support the rotation shaft 23 of the reel 22 are fixed to the left and right sides of the reel storage cover 25. A pressing member 24 that restricts the movement of the reel 22 in the axial direction relative to the rotation shaft 23 is provided between the left bearing 26 and the reel 22 on the outer peripheral surface of the rotation shaft 23.
That is, the reel 22 is held so as not to move relative to the rotation shaft 23 in the axial direction and the rotation direction.

The front end portion 23f (right end portion 23f) of the rotation shaft 23 of the reel 22 protrudes from the bearing 26 of the reel storage cover 25, and one end (center end) of the mainspring 27 is connected to the protruding portion. The other end (outer peripheral end) of the mainspring 27 is connected to the reel storage cover 25 via a leaf spring case 27c. As a result, the belt 14 is fed out from the reel 22 against the spring force of the mainspring 27. That is, the mainspring 27 corresponds to the reel urging means of the present invention.
Further, the base end portion 23m (left end portion 23m) of the rotation shaft 23 of the reel 22 protrudes from the bearing 26 of the reel storage cover 25, and is fixed in a state where the reel-side rotation gear 31 is prevented from rotating. ing. Further, the intermediate member 40 and the drive side rotation gear 50 are mounted on the projecting portion of the rotation shaft 23 at a position outside the reel side rotation gear 31 so as to be rotatable relative to the rotation shaft 23.

The drive-side rotation gear 50 is a disc-shaped spur gear provided on the outermost side of the protruding portion of the rotation shaft 23 and meshes with the small gear 52 as shown in FIG. Here, FIG. 4 (B) represents the BB arrow view of FIG. 4 (A) (IVB-IVB arrow view of FIG. 2).
The small gear 52 is a gear that is rotated by a motor 50m (see FIG. 7) that is a drive source, and is rotatably supported by a support shaft 23p fixed to the reel storage cover 25 in a state parallel to the rotation shaft 23. Yes. As a result, when the rotation of the motor 50m is transmitted to the drive side rotation gear 50 via the small gear 52, the drive side rotation gear 50 rotates in the belt feeding direction (counterclockwise in FIG. 4B) or in the belt winding direction ( Rotate clockwise.
As shown in the wiring block diagram of FIG. 7, the motor 50 m rotates in the belt feeding direction or the belt winding direction when the engine control unit (ECU) of the vehicle 1 operates in response to a signal from the remote control oscillator 61. It is configured as possible.
As shown in FIG. 4B and the like, a plurality of (five in the figure) rectangular openings 54 curved in an arc shape are formed in the driving side rotation gear 50 at equal intervals surrounding the through hole 51 of the rotation shaft 23. Has been. That is, a wall portion 50k (intermediate wall portion 50k) having a constant width is formed between adjacent square openings 54 in the circumferential direction. And the drive side protrusion 44 of the intermediate member 40 can be fitted to or detached from the square openings 54. The intermediate wall 50k includes a front front side 501k (see FIG. 6 and the like) and a rear rear side 502k when the drive side rotation gear 50 rotates in the belt winding direction (right rotation direction in FIG. 4B). (Refer to FIG. 6 and the like) is parallel to the rotation shaft 23 of the drive side rotation gear 50.
As will be described later, the drive-side rotation gear 50 is held in a transmission state in which the rotational force can be transmitted to the reel-side rotation gear 31 or in a non-transmission state by the action of the intermediate member 40.

The reel-side rotation gear 31 is a gear that constitutes a rotation lock mechanism that transmits the rotation of the drive-side rotation gear 50 transmitted through the intermediate member 40 to the reel 22 and locks the rotation of the reel 22. As shown in FIG. 3, the reel-side rotation gear 31 is formed with three through holes 31h curved in an arc shape at equal intervals so as to surround the rotary shaft 23. The reel-side protrusion 42 of the intermediate member 40 is fitted from the outside (left side in FIG. 2). In FIG. 3, the reel side protrusion 42 of the intermediate member 40 is omitted. Both side surfaces of the through-hole 31 h in the rotation direction are parallel to the rotation shaft 23 of the reel-side rotation gear 31.
Further, as shown in FIGS. 3A and 3B, the reel-side rotating gear 31 has a large number of saw-toothed teeth 31w on the outer peripheral surface. The front surface of the tooth 31w in the belt winding direction (right rotation direction) is an inclined surface 31f that is gently inclined, and the rear surface is an abruptly inclined engaging surface 31b. Here, FIGS. 3A and 3B show the III-III arrow view of FIG.

The rotation lock mechanism includes a reel-side rotation gear 31, a lock member 33, a link mechanism 34, and a lock release solenoid SOL1.
As shown in FIG. 3, the lock member 33 is disposed along the outer peripheral surface of the reel-side rotation gear 31 on the rear side of the reel-side rotation gear 31. A fitting hole 33h is formed in the upper center portion of the lock member 33, and the support shaft 23p of the small gear 52 is inserted into the fitting hole 33h so as to be relatively rotatable. As a result, the lock member 33 can rotate around the support shaft 23p. On the front side surface of the front end (lower end) of the lock member 33, a flange portion 33k that can be engaged with the teeth 31w of the reel side rotation gear 31 is formed. Further, one end of the link mechanism 34 is connected to the base end portion (upper end portion) of the lock member 33 in an articulated manner, and the other end of the link mechanism 34 is forward of the reel-side rotation gear 31 (right in the drawing). ) Is connected to the unlocking solenoid SOL1. The unlocking solenoid SOL1 is configured to pull the link mechanism 34 when energized and push out the link mechanism 34 with a spring force when de-energized. As shown in FIG. 3B, the lock member 33 rotates counterclockwise about the support shaft 23p while the lock release solenoid SOL1 pushes the link mechanism 34 when the energization is not energized, and the flange 33k is on the reel side. Engage with the teeth 31 w of the rotating gear 31. Thereby, the rotation of the reel 22 in the belt feeding direction is locked. As shown in FIG. 3A, when the unlocking solenoid SOL1 pulls the link mechanism 34 when energized, the lock member 33 rotates clockwise around the support shaft 23p, and the flange portion 33k rotates on the reel side rotation gear 31. The tooth 31w is removed. Thereby, the rotation lock of the reel 22 in the belt feeding direction is released.
As shown in FIG. 7, the unlocking solenoid SOL1 is configured to operate based on a signal from an engine control unit (ECU). That is, the unlocking solenoid SOL1 is energized (rotation lock released) or energized (rotation locked) in accordance with the driving and stopping of the motor 50m. Further, the free switch 62 is energized by being pushed.

As shown in FIG. 2, the intermediate member 40 is disposed between the drive side rotation gear 50 and the reel side rotation gear 31, and is configured to be movable in the axial direction along the rotation shaft 23. . As shown in FIGS. 2 and 4A, the intermediate member 40 includes a disk portion 41, and a center opening 41 h through which the rotation shaft 23 passes is formed at the center of the disk portion 41. In FIG. 4A, the central opening 41h is omitted.
In addition, the disc portion 41 of the intermediate member 40 has a reel-side protrusion 42 formed on the back surface 41 b facing the reel-side rotation gear 31. As described above, the reel side protrusion 42 is a protrusion into which the through long hole 31h of the reel side rotating gear 31 is fitted, and is formed at a position corresponding to the through long hole 31h. Even if the reel-side protrusion 42 moves to a position farthest from the position where the intermediate member 40 is closest to the reel-side rotation gear 31 (see the two-dot chain line in FIG. 2), that is, the position where the reel-side protrusion 42 contacts the drive-side rotation gear 50. The projecting dimensions are set so that the reel-side rotation gear 31 is held in a fitted state with the through long hole 31h. Further, both side surfaces in the rotation direction of the reel-side protrusion 42 are parallel to both rotation directions of the intermediate member 40.

The disk portion 41 of the intermediate member 40 has a drive-side protrusion 44 formed on a surface 41 f that faces the drive-side rotation gear 50. As described above, the drive-side protrusion 44 is a protrusion that is configured to be fitted to or detachable from the rectangular opening 54 of the drive-side rotation gear 50, and is formed with an arrangement equal to the rectangular opening 54. Has been. In a state in which the driving side protrusion 44 is fitted in the rectangular opening 54, the driving side protrusion 44 and the intermediate wall portion 50k are arranged so as to overlap in the rotation direction.
The drive-side protrusion 44 is a block-like protrusion having a planar shape (see FIG. 4B) that is substantially the same as the rectangular opening 54 of the drive-side rotation gear 50, and its side shape is as shown in FIG. 4A. Furthermore, it is formed in an oblique trapezoidal shape. In other words, the drive-side protrusion 44 has a front inclined surface in which the front surface when the intermediate member 40 rotates in the belt winding direction (the right rotation direction in FIG. 4B) is gently inclined with respect to the surface 41 f of the disk portion 41. 44 f, and the rear surface is a rear vertical surface 44 b formed in parallel to the rotation shaft 23 of the intermediate member 40.

Then, with the drive-side protrusion 44 of the intermediate member 40 engaged with the rectangular opening 54 of the drive-side rotation gear 50, the rear vertical surface 44b of the drive-side protrusion 44 is thereafter moved as shown in FIG. It is in surface contact with the front side surface 501k of the intermediate wall portion 50k located on the side. In this state, when the drive side rotation gear 50 tries to rotate in the belt winding direction (rightward in FIG. 4A) with respect to the intermediate member 40, the drive side protrusion 44 is positioned on the rear vertical surface 44b and the rear side thereof. By engaging with the rear side surface 502k of the intermediate wall portion 50k, the both 44 and 54 rotate together.
Further, when the intermediate member 40 tries to rotate in the belt winding direction (rightward in FIG. 4A) with respect to the driving side rotation gear 50, the front side inclined surface 44f of the driving side projection 44 and the front side thereof are gradually inclined. The intermediate wall 40k is displaced in the axial direction (upward in FIG. 4A) while the intermediate wall 40k is displaced in the axial direction (upward in FIG. 4 (A)). The member 40 rotates relative to the drive side rotation gear 50 (see FIG. 5A).
That is, as shown in FIG. 4A, in a state where the drive-side protrusion 44 of the intermediate member 40 is engaged with the rectangular opening 54 of the drive-side rotation gear 50, the belt with respect to the drive-side rotation gear 50 of the intermediate member 40 Although rotation in the winding direction is allowed, rotation in the feeding direction is restricted.

Around the base end portion 23m of the rotation shaft 23, as shown in FIG. 2 and the like, the intermediate member 40 is placed in the direction of the drive-side rotation gear 50 at a position between the intermediate member 40 and the reel-side rotation gear 31. A coil spring 49 biased so as to be pressed is attached.
Further, in the disk portion 41 of the intermediate member 40, a step groove 41m having a square cross section is formed on the entire outer periphery of the surface 41f. Then, as shown in FIG. 4A, the operation lever 48 of the rotation restriction release solenoid SOL2 can be engaged with the step groove 41m from the front side (drive side rotation gear 50 side) of the intermediate member 40. . The rotation restriction release solenoid SOL2 is configured to pull in the operation lever 48 when energized and push out the operation lever 48 with a spring force when de-energized. For this reason, when the operation lever 48 of the rotation restriction release solenoid SOL2 is pulled by energization, the operation lever 48 engages with the step groove 41m, and the intermediate member 40 resists the spring force of the coil spring 49 and the reel-side rotation gear 31. Pulled in the direction of Thereby, as will be described later, the drive-side protrusion 44 of the intermediate member 40 is detached from the square opening 54 of the drive-side rotation gear 50. Further, when the operation lever 48 of the rotation restriction release solenoid SOL2 is pushed out when the current is not energized, the operation lever 48 is held at a position that does not hinder the movement of the intermediate member 40 in the axial direction.
The rotation restriction release solenoid SOL2 operates in response to a signal from the engine control unit (ECU) as shown in FIG. That is, when the free switch 62 is pushed, the rotation restriction release solenoid SOL2 is energized by a signal from the engine control unit (ECU), and the intermediate member 40 receives a force in a direction away from the drive side rotation gear 50.

That is, the drive side rotation gear 50 corresponds to the drive side rotation member of the present invention, and the reel side rotation gear 31 corresponds to the reel side rotation member of the present invention. Further, the drive side rotation gear 50, the reel side rotation gear 31, the intermediate member 40, the coil spring 49, and the like correspond to the drive force transmission mechanism of the present invention, and the intermediate member 40, the coil spring 49, the drive side protrusion 44 of the intermediate member 40, The intermediate wall portion 50k of the drive side rotation gear 50 corresponds to the one-way rotation restricting mechanism of the present invention.
Further, the position where the drive side protrusion 44 of the intermediate member 40 is fitted to the rectangular opening 54 of the drive side rotation gear 50 is the one-way rotation restricting position of the present invention, and the drive side protrusion 44 of the intermediate member 40 is the drive side rotation gear. The position pushed out from the 50 square openings 54 is the rotation restriction release position of the present invention.
Further, the driving side protrusion 44 and the intermediate wall portion 50k of the intermediate member 40 correspond to the engaging portion of the present invention, and the rear vertical surface 44b of the driving side protrusion 44 and the front side surface 501k of the intermediate wall portion 50k are the present invention. Corresponds to the engaging surface. Further, the front inclined surface 44f of the drive side protrusion 44 corresponds to the guide surface of the present invention.
The coil spring 49 corresponds to the intermediate member biasing means of the present invention, and the rotation restriction release solenoid SOL2 and the operation lever 48 correspond to the rotation restriction release mechanism of the present invention.

<About operation | movement of the winch apparatus 10 for vehicles>
Next, the operation of the above-described vehicle winch device 10 will be described.
When the wheelchair S is boarded, first, the wheelchair slope 2 is deployed with the rear door of the vehicle 1 being opened. Furthermore, in order to make the inclination of the wheelchair slope 2 gentle, the rear portion of the vehicle 1 is lowered by a certain height. In this state, the wheelchair S is guided to the position of the wheelchair slope 2 (see FIG. 1A). Next, when the assistant pushes the free switch 62 of the operation unit 17, the engine control unit (ECU) energizes the unlocking solenoid SOL1 and the rotation restriction releasing solenoid SOL2. As a result, the unlocking solenoid SOL1 operates in a direction to remove the collar portion 33k of the lock member 33 from the teeth 31w of the reel side rotation gear 21, and the rotation lock of the reel 22 is released. Further, the operation lever 48 of the rotation restriction release solenoid SOL2 operates so as to pull the intermediate member 40 in the direction (axial direction) of the reel side rotation gear 31 against the spring force of the coil spring 49. At this time, since the intermediate member 40 does not receive the rotational force in the belt feeding direction (leftward in FIG. 4A), the rear vertical surface 44b (engagement surface) of the drive side protrusion 44 of the intermediate member 40 and the drive side The sliding resistance (frictional force) in the axial direction with the front side surface 501k (engagement surface) of the intermediate wall 50k of the rotation gear 50 is small. Accordingly, the intermediate member 40 moves in the direction (axial direction) of the reel-side rotation gear 31 against the spring force of the coil spring 49, and the drive-side protrusion 44 of the intermediate member 40 is detached from the rectangular opening 54 of the drive-side rotation gear 50. To do. That is, the reel 22 side (reel 22, reel-side rotating gear 31 and intermediate member 40) and the motor 50m side (motor 50m, small gear 52, and driving-side rotating gear 50) are wound up relative to each other in the feeding direction. Rotation is possible. Thus, the assistant can pull out or rewind the belt 14 from the reel 22 at an arbitrary speed against the spring force of the mainspring 27.

When the belt 14 is pulled out, the connecting portion 14f of the left and right belts 14 is hung above the front wheel caster of the wheelchair S, and the assistant pushes the belt switch (not shown) of the operation portion 17, the boarding of the wheelchair S is performed. Preparation is complete.
Next, when the assistant pushes the up button of the remote control transmitter 61, the energization of the rotation restriction release solenoid SOL2 is released, and the operation lever 48 is pushed out. As a result, the intermediate member 40 moves in the direction of the drive side rotation gear 50 by the spring force of the coil spring 49, and the drive side protrusion 44 of the intermediate member 40 is fitted into the rectangular opening 54 of the drive side rotation gear 50. In other words, the reel 22 side (reel 22, reel-side rotary gear 31 and intermediate member 40) is allowed to rotate in the belt winding direction with respect to the motor 50m side (motor 50m, small gear 52 and drive-side rotary gear 50). The rotation in the feeding direction is restricted.

Further, when the ascending button of the remote control transmitter 61 is pressed, the motor 50m rotates in the belt winding direction while the ascending button is being pressed. Thereby, the rotation of the motor 50m is transmitted to the reel 22 via the small gear 52, the driving side rotating gear 50, the intermediate member 40, and the reel side rotating gear 31, and the reel 22 rotates in the belt winding direction. As a result, the left and right belts 14 are wound around the reels 22, and the wheelchair S is raised along the wheelchair slope 2 as shown in FIG. When the wheelchair S reaches the front end position of the floor surface 1 f of the vehicle 1, the motor 50 m stops when the assistant releases the ascending button of the remote control transmitter 61. Further, when the motor 50m is stopped, the energization of the unlocking solenoid SOL1 is released, and the unlocking solenoid SOL1 operates in a direction to engage the flange portion 33k of the lock member 33 with the teeth 31w of the reel side rotation gear 21. The reel 22 is rotationally locked.
In this state, a connecting member (not shown) installed on the floor surface 1f of the vehicle 1 is connected to the wheelchair S to restrict the forward movement of the wheelchair S, and a remote control is applied so that a predetermined tension acts on the belt 14. After the belt 14 is wound up slightly by pressing the ascending button of the transmitter 61, the reel 22 is rotationally locked by releasing the ascending button, the feeding of the belt 14 is restricted, and the wheelchair S is fixed to the floor surface 1f. That is, the vehicle winch device 10 also constitutes a wheelchair fixing device together with the connecting member.

When the wheelchair S gets off, as described above, after the wheelchair slope 2 is deployed and preparation for getting off is completed, the assistant presses the lowering button of the remote control transmitter 61, thereby energizing the unlocking solenoid SOL1. . As a result, the unlocking solenoid SOL1 operates in a direction to remove the collar portion 33k of the lock member 33 from the teeth 31w of the reel side rotation gear 21, and the rotation lock of the reel 22 is released.
Further, when the lowering button of the remote control transmitter 61 is pressed, the motor 50m rotates in the belt feeding direction while the lowering button is pressed. Thereby, the rotation of the motor 50m is transmitted to the drive side rotation gear 50 through the small gear 52, and the drive side rotation gear 50 rotates in the belt feeding direction. In this state, when the wheelchair tries to descend, the intermediate member 40 tries to rotate in the belt feeding direction via the belt 14, the reel 22, and the reel side rotation gear 31, but the drive side rotation gear 50 rotates in the same direction. Therefore, the rotation is possible within a range that does not exceed the rotation speed of the drive side rotation gear 50. Accordingly, when the wheelchair S freely descends or the caregiver pulls the wheelchair S backward, the left and right belts 14 are fed out of the reel 22 against the spring force of the mainspring 27, and the wheelchair S descends along the wheelchair slope 2. To do. In addition, the motor 50m is once stopped in a state where the belt 14 is slightly extended and the forward pulling force with respect to the connecting member is released, and the connecting member is removed from the wheelchair S. When the wheelchair S reaches the road surface, the motor 50m stops when the assistant releases the lowering button of the remote control transmitter 61. Further, the energization of the unlocking solenoid SOL1 is released, and the reel 22 is rotationally locked.
Next, the free switch 62 is pushed to energize the lock release solenoid SOL1 and the rotation restriction release solenoid SOL2. As a result, the assistant can pull out the belt 14 from the reel 22 against the spring force of the mainspring 27 and the wheelchair S can remove the connecting portion 14f of the belt 14 as described above.
In addition, after the wheelchair S removes the connecting portion 14 f of the belt 14, the belt 14 can be wound around the reel 22 by the spring force of the mainspring 27.

<Specific operation of the vehicle winch device 10>
Next, a specific operation of the vehicle winch device 10 according to the present embodiment will be described.
For example, while the wheelchair S is descending along the wheelchair slope 2, the reel 22 and the reel-side rotation gear 31 are slower than the feeding speed of the belt 14 when the reel-side rotation gear 31 rotates at the same speed as the drive-side rotation gear 50. Suppose that the wheelchair S is lowered. In this case, the reel 22, the reel-side rotation gear 31 and the intermediate member 40 try to rotate in the winding direction by the spring force of the mainspring 27. That is, in the state shown in FIG. 4A, the drive side rotation gear 50 is rotated in the belt feeding direction by the drive of the motor 50m (moved leftward in the figure), whereas the intermediate member 40 is in the winding direction. Attempts to rotate (move to the right in the figure). At this time, as shown in FIGS. 6A to 6D, the front inclined surface 44f (guide surface) of the drive-side protrusion 44 of the intermediate member 40 is connected to the rear side surface 502k of the intermediate wall portion 50k of the drive-side rotation gear 50. Due to this relative sliding action, the drive-side protrusion 44 of the intermediate member 40 resists the spring force of the coil spring 49 (see FIG. 2, FIG. 4A, etc.) and the rectangular opening 54 of the drive-side rotation gear 50. The intermediate member 40 and the drive side rotation gear 50 are allowed to rotate relative to each other while being separated from each other. That is, while the reel 22 side rotates in the winding direction relative to the motor 50 m side, the reel 22 slowly rotates in the feeding direction according to the lowering speed of the wheelchair S. Thereby, even if the descending speed of the wheelchair S becomes smaller than the winch descending speed, the trouble that the belt 14 is slack does not occur.
Further, for example, when the empty wheelchair S is placed on the vehicle 1, the reel 22 and the reel-side rotation gear 31 rotate at the same speed as the drive-side rotation gear 50, so that the speed of the belt 14 is higher than the winding speed of the belt 14. Even when the rising speed is increased, as described above, the reel 22 rotates in the winding direction relative to the motor 50 m side, and the reel 22 responds to the rising speed of the wheelchair S by the spring force of the mainspring 27. Rotate quickly in the winding direction. Thereby, the malfunction which the belt 14 loosens does not generate | occur | produce.

Next, an operation when the free switch 62 is pushed and operated while the wheelchair S stops the wheelchair slope 2 while moving up and down will be described with reference to the flowchart of FIG.
When the free switch 62 is operated (YES in steps S101 and S102), the motor 50m is driven in the belt winding direction for a set time (steps S103 to S105). Thereby, even if the belt 14 is slack, the slack is removed, and tension is applied to the belt 14 when the wheelchair S descends the wheelchair slope 2 by gravity. Next, the unlocking solenoid SOL1, which has been de-energized by stopping the motor 50m, is energized again (step S106). Thereby, the rotation lock of the reel 22 is released. Further, the rotation restriction release solenoid SOL2 is energized (step S107), and the operation lever 48 of the rotation restriction release solenoid SOL2 opposes the intermediate member 40 against the spring force of the coil spring 49 in the direction of the reel side rotation gear 31 (axial direction). Works like pulling.

At this time, since the tensile load from the wheelchair S is applied to the belt 14, the reel 22, the reel-side rotation gear 31, and the intermediate member 40 receive a rotational force in the feeding direction against the spring force of the spring 27. For this reason, the sliding resistance (in the axial direction) between the rear vertical surface 44b (engagement surface) of the drive-side protrusion 44 of the intermediate member 40 and the front side surface 501k (engagement surface) of the intermediate wall portion 50k of the drive-side rotation gear 50 (see FIG. (Friction force) is larger than the operating force of the rotation restriction release solenoid SOL2. Therefore, even if the operation lever 48 of the rotation restriction release solenoid SOL2 pulls the intermediate member 40 in the direction of the reel-side rotation gear 31, the drive-side protrusion 44 of the intermediate member 40 and the rectangular opening 54 of the drive-side rotation gear 50 are fitted. Held in a state. That is, even if the rotation restriction release solenoid SOL2 is energized, the rotation restriction release state in which the reel 22 side and the motor 50m side are allowed to take up and rotate relative to each other in the feeding direction is not brought about. For this reason, the wheelchair S maintains the state stopped in the middle of the slope 2 for wheelchairs.
In this state, the assistant pushes up the wheelchair S to release the tension of the belt 14, whereby the rear vertical surface 44 b (engagement surface) of the drive-side protrusion 44 of the intermediate member 40 and the intermediate wall portion of the drive-side rotation gear 50. The frictional force with the front side 501k (engagement surface) of 50k is reduced, and the drive side protrusion 44 of the intermediate member 40 is detached from the rectangular opening 54 of the drive side rotary gear 50 by the action of the rotation restriction release solenoid SOL2. Thereby, the assistant can raise and lower the wheelchair S freely.

<Advantages of the vehicle winch device 10 according to the present embodiment>
According to the vehicle winch device 10 according to the present embodiment, the unidirectional rotation restricting mechanism including the intermediate member 40, the coil spring 49, the drive-side protrusion 44 of the intermediate member 40, the intermediate wall portion 50k of the drive-side rotation gear 50, and the like. Thus, the reel-side rotation gear 31 is allowed to rotate in the winding direction with respect to the drive-side rotation gear 50, but the rotation in the feed-out direction is restricted. For this reason, for example, if the assistant lowers the wheelchair S more slowly than the feeding speed of the belt 14 when the reel 22 and the reel-side rotation gear 31 rotate at the same speed as the drive-side rotation gear 50, the reel-side rotation gear 31 rotates relative to the drive-side rotation gear 50 in the winding direction of the reel 22 with the force of the mainspring 27, and the rotation speed of the reel 22 and the reel-side rotation gear 31 becomes slower than the rotation speed of the drive-side rotation gear. Accordingly, the reel 22 and the reel-side rotation gear 31 are rotated in accordance with the descending speed of the wheelchair S, and the slack of the belt 14 fed out from the reel 22 can be prevented.
For example, if the assistant raises the wheelchair S faster than the feeding speed of the belt 14 when the assistant rotates the reel 22 and the reel-side rotation gear 31 at the same speed as the drive-side rotation gear 50, the reel-side rotation gear also becomes the same. 31 rotates relative to the drive-side rotation gear 50 in the winding direction of the reel 22, and the rotation speed of the reel 22 and the reel-side rotation gear 31 is faster than the rotation speed of the drive-side rotation gear 50 (winch ascent speed). Become. As a result, the reel 22 and the reel-side rotation gear 31 rotate in accordance with the ascending speed of the wheelchair S, and the slack of the belt 14 wound around the reel 22 can be prevented.

Further, for example, when the belt 14 is pulled out from the reel 22 before the wheelchair S is put on the vehicle 1, the drive-side rotation gear 50 and the reel-side rotation gear 31 are rotated by the free switch 62 and the rotation restriction release solenoid SOL 2. Since the restriction can be released, the belt 14 can be pulled out from the reel 22 at an arbitrary speed. Therefore, the belt 14 can be quickly connected to the wheelchair S.
Further, in a state where the wheelchair S stops the wheelchair slope while moving up and down, even if the free switch 62 and the rotation restriction release solenoid SOL2 are operated, the drive side protrusion 44 of the intermediate member 40 and the rectangular opening 54 of the drive side rotation gear 50 are operated. Is not released. As a result, even if an erroneous operation is performed, the wheelchair S does not naturally descend on the wheelchair slope 2 due to gravity in the middle of ascending / descending, and the safety of the wheelchair occupant can be ensured.
In addition, when the free switch 62 is operated while the wheelchair S stops the wheelchair slope while moving up and down, the drive source (motor 50m) rotates the drive side rotation gear 50 in the reel winding direction for a certain time. Therefore, tension is applied to the belt 14 when the wheelchair S descends the wheelchair slope 2 by gravity. For this reason, the reel side rotation gear 31 receives a rotational force in the reel 22 feeding direction due to the tension from the wheelchair S. Therefore, even if the rotation restriction release solenoid SOL2 is operated, as described above, as long as the assistant does not move the wheelchair S in the upward direction, the driving-side protrusion 44 of the intermediate member 40 and the rectangular opening 54 of the driving-side rotating gear 50 Is not released. For this reason, the safety of the wheelchair occupant can be ensured.

<Example of change>
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention. For example, in this embodiment, the drive side protrusion 44 was formed in the intermediate member 40, the intermediate member 40 was displaced to the axial direction, and the example which fits the drive protrusion 44 with the square opening 54 of the drive side rotation gear 50 was shown. . However, the intermediate member 40 is omitted, and the drive-side protrusion 44 is formed on the reel-side rotation gear 31 so that the drive-side rotation gear 50 can be displaced in the axial direction to drive the drive-side protrusion 44 of the reel-side rotation gear 31. A configuration in which the side opening gear 50 is fitted to the square opening 54 is also possible.
In the present embodiment, the reel-side protrusion 42 of the intermediate member 40 is always fitted in the through-hole 31 h of the reel-side rotation gear 31, and the drive-side protrusion 44 of the intermediate member 40 is a rectangular opening 54 of the drive-side rotation gear 50. And a configuration capable of releasing the fitting. However, the drive-side protrusion 44 of the intermediate member 40 and the rectangular opening 54 of the drive-side rotation gear 50 are always fitted, and the reel-side protrusion 42 of the intermediate member 40 and the through-hole 31h of the reel-side rotation gear 31 are fitted. Or a configuration that can release the fitting.
Further, in the present embodiment, a front inclined surface 44 f (guide surface) is formed on the drive side protrusion 44 of the intermediate member 40, and a rear side surface 502 k of the drive side rotation gear 50 is formed in parallel with the rotation shaft 23. Although the example to do is shown, it is also possible to form the front surface 44f of the drive side protrusion 44 in parallel with the rotation shaft 23 and to make the rear side surface 502k of the intermediate wall portion 50k an inclined surface.
In addition, the reel side rotation gear 31 and the lock member 33 are used to lock the reel 22. However, an electromagnetic clutch or the like can be used instead of the lock member 33 or the like.

It is a perspective view (A figure, B figure) showing the use condition of the winch apparatus for wheelchairs concerning Embodiment 1 of this invention. It is a longitudinal cross-sectional view showing the winch main body of the winch apparatus for wheelchairs. It is the III-III arrow line view (A figure, B figure) of FIG. FIG. 5 is a plan sectional view (A view) showing a unidirectional rotation restricting operation of the intermediate member, and a view taken along arrow BB in FIG. A (view taken along arrow IVB-IVB in FIG. 2). It is a plane sectional view (A figure) showing rotation regulation release operation of an intermediate member, and a BB arrow line view of A figure. It is a plane sectional view (A figure, B figure, C figure, D figure) showing the rotation regulation release process of an intermediate member. It is a wiring block diagram of the winch device for wheelchairs. It is a flowchart showing operation | movement of the winch apparatus for wheelchairs.

Explanation of symbols

S Wheelchair 2 Wheelchair ramp 20 Winch body 14 Belt (traction member)
14f connecting portion 22 reel 27 mainspring (reel biasing means)
31 Reel-side rotating gear (reel-side rotating member driving force transmission mechanism)
40 Intermediate member (driving force transmission mechanism unidirectional rotation restriction mechanism)
41 Disc part 41m Step groove (Rotation restriction release mechanism)
44 Drive-side protrusion (one-way rotation restricting mechanism engaging portion)
44b Rear vertical surface (engagement surface)
44f Front inclined surface (guide surface)
SOL2 Rotation restriction release solenoid (Rotation restriction release mechanism)
48 Operation lever (rotation restriction release mechanism)
49 Coil spring (intermediate member biasing means unidirectional rotation restricting mechanism)
50 Drive-side rotating gear (Drive-side rotating member, driving force transmission mechanism)
50m motor (drive source)
50k intermediate wall (unidirectional rotation restricting mechanism, engaging part)
501k Front side (engagement surface)
502k Rear side 54 Square opening

Claims (6)

A traction member provided on a vehicle having a slope for getting on and off a wheelchair and having a connecting portion connectable to a wheelchair at a tip, a reel capable of winding and unwinding the traction member, and urging the reel in a winding direction A reel urging means, a drive source, and a drive force transmission mechanism for transmitting the operation of the drive source to the reel, and when the traction member is connected to a wheelchair, in the winding direction of the drive source So that the reel rotates in the winding direction and the wheelchair moves up the slope, and the operation of the driving source in the feeding direction causes the reel to rotate in the feeding direction and the wheelchair moves down on the slope. A wheelchair winch device configured,
The driving force transmission mechanism has a driving side rotating member connected to the driving source side and a reel side rotating member connected to the reel side, and the reel side rotating member is wound around the driving side rotating member. A winch device for a wheelchair comprising a one-way rotation restricting mechanism configured to allow rotation in a direction but restrict rotation in a feeding direction. The wheelchair winch device according to claim 1,
The winch device for a wheelchair characterized in that the one-way rotation restricting mechanism can be switched to a rotation restriction releasing state that allows the reel side rotating member to rotate in the winding direction and the feeding direction with respect to the driving side rotating member. . The wheelchair winch device according to claim 1,
An intermediate member in which the one-way rotation restricting mechanism is attached to one of the drive-side rotating member and the reel-side rotating member so as to be integrally rotatable and movable between a one-way rotation restricting position and a rotation restriction releasing position. And intermediate member urging means for urging the intermediate member toward the one-way rotation restricting position side,
The other member of the drive side rotation member and the reel side rotation member and the intermediate member overlap each other in the rotation direction when the intermediate member is in the one-way rotation restriction position, and the intermediate member is in the rotation restriction release position. Engaging portions that do not overlap each other in the rotational direction when
The engaging portions are provided with engaging surfaces that engage with each other in the rotational direction with respect to the rotation of the reel-side rotating member with respect to the driving-side rotating member and rotate the two members integrally.
Furthermore, at least one of the engaging portions is in contact with the other engaging portion with respect to the rotation of the reel-side rotating member in the winding direction with respect to the driving-side rotating member, and the intermediate member is in contact with the intermediate member. A winch device for a wheelchair characterized in that a guide surface is provided for applying a force to move to the rotation restriction release position against the biasing force of the member biasing means. A winch device for a wheelchair according to claim 3,
The intermediate member is moved to the rotation restriction release position against the urging force of the intermediate member urging means, and the one-way rotation restriction mechanism is moved in the winding direction and feeding of the reel-side rotation member with respect to the drive-side rotation member. A winch device for a wheelchair comprising a rotation restriction release mechanism for switching to a rotation restriction release state that allows rotation in a direction. A winch device for a wheelchair according to claim 4,
In a state where a predetermined tension equal to or greater than the tension when the wheelchair descends on the slope due to gravity is applied to the pulling member, the frictional force of the engagement surface of the intermediate member and the engagement surface of the drive side rotation member A winch device for a wheelchair, wherein the intermediate member does not move to the rotation restriction release position even if a force from the rotation restriction release mechanism to the rotation restriction release position is applied to the intermediate member. A winch device for a wheelchair according to claim 5,
Before the rotation restriction release mechanism applies a force to the rotation restriction release position with respect to the intermediate member, the drive source is slightly rotated in the winding direction so that the predetermined tension acts on the pulling member. Features a wheelchair winch device.

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