JP2008127109A - Winch device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To operate a mechanism for transmitting rotation or releasing the transmission with an actuator (a fitting regulating driving source) for driving with a small driving force. <P>SOLUTION: A power transmitting mechanism of a winch device of this invention comprises a drive side rotary member 50, a reel side rotary member, an intermediate member 40, a fitting regulating member 61, an operating member 65 and a fitting regulating driving source. The operating member 65 is operated by the fitting regulating driving source to move the fitting regulating member 61 from a fitting allowable position to a fitting regulated position. When fitting a fitting regulating projection 62 of the fitting regulating member 61 in a through hole 54 of the drive side rotary member 50, a winding driving source rotates the drive side rotary member 50 in a traction member delivering direction in relation to the reel side rotary member, and moves the intermediate member 40 to a fitting release position, and removes a power transmitting projection 44 of the intermediate member 40 from the through hole 54 of the drive side rotary member 50. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pulling member that can be connected to a pulling object, a reel that can wind and pull out the pulling member, a reel biasing means that biases the reel in the winding direction, a winding drive source, and a winding In particular, in a vehicle equipped with a slope for getting on and off a wheelchair, the wheelchair is raised or lowered on the slope. It relates to a winch device.

A technique relating to the winch device described above is disclosed in Patent Document 1.
This winch device is a winch device provided in a vehicle having a slope for getting on and off a wheelchair. The winch device includes a belt having a connecting portion that can be connected to a wheelchair, a reel capable of winding and unwinding the belt, a spring material that urges the reel in a winding direction, and rotation of a motor that is a driving source. And a power transmission mechanism for transmitting the power to the reel. The power transmission mechanism includes a drive side rotation member and a reel side rotation member, and the rotational force of the drive side rotation member is transmitted to the reel side rotation member and the reel via an electromagnetic clutch. The electromagnetic clutch holds the driving side rotating member and the reel side rotating member in a relatively rotatable state when the motor is stopped so that the belt can be pulled out from the reel by hand. Enables rotation transmission to the rotating member.

JP 2004-357879 A

The electromagnetic clutch generally includes a first iron plate with an electromagnet fixed to one rotating body side and a second iron plate fixed to the other rotating body side, and a second iron plate is energized by energizing the electromagnet. The iron plate is sucked onto the first iron plate, and the rotation of one rotating body is transmitted to the other rotating body. As described above, since the second iron plate is attracted to the first iron plate to transmit the rotation, the driving force of the electromagnetic clutch needs to be set large in order to ensure the rotation transmission. For this reason, there exists a problem that an electromagnetic clutch becomes large and power consumption becomes large.

  The present invention has been made to solve the above problems, and the problem to be solved by the present invention is to enable a mechanism for transmitting or releasing rotation to be operated with an actuator having a small driving force. It is to reduce the power consumption while reducing the size of the actuator.

The above-described problems are solved by the inventions of the claims.
The invention of claim 1 includes a pulling member connectable to a pulling target, a reel capable of winding and unwinding the pulling member, a reel biasing means for biasing the reel in the winding direction, and a winding drive. A winch device comprising: a power source; and a power transmission mechanism for transmitting power in a winding direction of the traction member of the winding drive source to the reel, wherein the power transmission mechanism is on the winding drive source side And a drive-side rotating member having a through-hole or notch penetrating in a direction parallel to the rotation axis, and a reel-side rotation arranged coaxially with the drive-side rotating member so as to be rotatable on the reel side A member, and a power transmission protrusion that is disposed between the driving side rotating member and the reel side rotating member and protrudes toward the driving side rotating member, and can be rotated integrally with the reel side rotating member. Engage and engage While the state is maintained, the power transmission protrusion is movable between a fitting position where the power transmission protrusion is fitted into the through-hole or notch of the driving-side rotating member and a fitting release position where the projection is separated from the through-hole or notch. In the fitting position, the rotation of the reel-side rotating member in the pulling member feeding direction with respect to the driving-side rotating member is restricted by the engagement between the power transmission protrusion and one side surface in the rotational direction of the through hole or notch. And the rotation of the reel-side rotating member in the winding direction of the reel-side rotating member with respect to the driving-side rotating member is performed by a cam mechanism formed between the power transmission protrusion and one side surface in the rotational direction of the through hole or notch. An intermediate member that is allowed to move while moving to the fitting release position, a biasing means that biases the intermediate member toward the fitting position, and a side opposite to the intermediate member across the drive side rotating member Arranged on the drive side A fitting restricting protrusion that fits into the through hole or notch of the driving side rotating member so as to rotate integrally with the rolling member, and the fitting restricting protrusion fits into the through hole or notch; While the state is maintained, the driving force transmitting projection is fitted to the through hole or the notch so that the fitting allowable position separated from the driving-side rotating member and the front end surface of the fitting regulating projection are driven. A fitting restricting member movable between a fitting restricting position approaching the drive side rotating member so as to be flush with a surface of the side rotating member on the intermediate member side, and a rotation shaft of the fitting restricting member Can be moved in a direction crossing the direction, and the movement in one direction pushes the fitting restricting member to generate a moving force to the fitting restricting position. Between the fitting restricting member so that the force acts only in the direction parallel to the rotation axis. An operation member constituting a cam mechanism, a fitting restriction drive source for moving the operation member, and when the operation member moves in the one direction by the operation of the fitting restriction drive source, or before that, The winding drive source is actuated in the pulling-member feeding direction for a predetermined time, the driving-side rotating member is rotated in the pulling-member feeding direction with respect to the reel-side rotating member, and the intermediate member is moved to the mating release position. And a control means.

According to the present invention, the intermediate member is engaged with the reel side rotating member so as to be rotatable integrally, and the power transmission projection is fitted in the through hole or the notch of the driving side rotating member while maintaining the engaged state. It is comprised so that it can move between the fitting position to perform, and the fitting cancellation | release position which detach | leaves from this through-hole or notch. Further, the intermediate member is pressed toward the fitting position by the biasing means. For this reason, the power transmission projection of the intermediate member is fitted into the through hole or notch of the driving side rotating member by the action of the biasing means, and the reel side rotating member rotates in the pulling member feeding direction with respect to the driving side rotating member. Be regulated. As a result, when the take-up drive source rotates in the take-up direction, the rotation is transmitted to the reel via the drive-side rotating member, the intermediate member, and the reel-side rotating member, and the towing member is taken up by the reel and pulled. Things are towed. Further, when the take-up drive source rotates in the feeding direction while the towing member is pulled in the feeding direction through the to-be-drawn object, the reel and the reel-side rotating member are fed out in a range not exceeding the rotation speed of the driving-side rotating member. Rotate in the direction and the towed object moves backward.
In other words, the power transmission protrusion of the intermediate member is fitted in the through hole or notch of the driving side rotating member so that both are engaged in the rotation direction to transmit the rotation. Rotation can be reliably transmitted to the rotating member.
Further, when the power transmission protrusion of the intermediate member is detached from the through hole or notch of the driving side rotating member, the control means operates the winding driving source in the pulling member feeding direction for a predetermined time to make the reel side rotating member On the other hand, the drive-side rotating member is rotated in the pulling-out member feeding direction, and the intermediate member is moved to the fitting release position against the biasing means. Then, after the intermediate member is moved to the mating release position, the power transmission projection of the intermediate member is detached from the through hole or notch of the driving side rotation member, or the operation of the fitting control drive source is released. As a result, the operating member moves in the direction of pushing the fitting restricting member to the fitting restricting position. As a result, the fitting restricting projection of the fitting restricting member is fitted into the through hole or notch of the driving side rotating member, and the front end surface of the fitting restricting projection is located on the intermediate member side of the driving side rotating member. Be flush with the surface. As a result, the reel-side rotating member and the drive-side rotating member can be rotated relative to each other, and the pulling member can be fed out from the reel while the take-up drive source is stopped.
As described above, after the power transmission projection of the intermediate member is detached from the through hole or notch of the driving side rotation member by the operation of the winding drive source, or when the fitting restriction member is separated Since the protrusion is fitted in the through hole or notch of the driving side rotating member, the driving force of the fitting restricting drive source can be reduced, and the fitting restricting drive source can be reduced in size and power consumption can be reduced. Can do.
Further, the operation member that pushes the fitting restricting member to the fitting restricting position is configured to move in the direction intersecting the rotation axis of the fitting restricting member by the function of the cam mechanism and push the fitting restricting member in the axial direction. . For this reason, the reaction force from the fitting restricting member acts on the operation member only in the direction parallel to the rotation shaft, and the reaction force is not applied to the fitting restricting drive source via the operation member. Therefore, even if the driving force of the fitting restricting drive source is reduced, there is no problem that the fitting restricting protrusion of the fitting restricting member is pushed back by the power transmitting protrusion of the intermediate member.

  According to the present invention, the drive-side rotating member has a configuration in which the power transmission protrusion of the intermediate member is engaged with the through-hole or the notch of the driving-side rotating member so that both are engaged in the rotation direction to transmit the rotation. Therefore, the rotation can be reliably transmitted to the reel side rotating member. Further, after the power transmission protrusion of the intermediate member is detached from the through hole or notch of the driving side rotation member, or when the intermediate member is released, the fitting restriction protrusion of the fitting restriction member is inserted into the through hole of the driving side rotation member or Due to the configuration of fitting in the notch, the driving force of the fitting restricting drive source (actuator) can be reduced, and the fitting restricting drive source (actuator) can be reduced in size and power consumption can be reduced.

[Embodiment 1]
Hereinafter, based on FIGS. 1-6, the winch apparatus which concerns on Embodiment 1 of this invention is demonstrated. The winch device according to the present embodiment is a winch device provided in a vehicle having a wheelchair slope, and FIG. 1 is a perspective view showing a use state of the winch device. FIG. 2 is a longitudinal sectional view of a winch body of the winch device, and FIGS. 3 and 4 are plan sectional views showing a fitting state and a fitting releasing state of the intermediate member and the driving side rotation gear. FIG. 5 is a front view showing the fitting restricting mechanism and the like, and FIG. 6 is a schematic view showing a fitting release process between the intermediate member and the driving side rotation gear.
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.

<Overall Configuration of Winch Device 10>
As shown in FIGS. 1A and 1B, the winch device 10 is a winch installed in a vehicle 1 having a wheelchair slope 2, and assists in raising and lowering the wheelchair S along the wheelchair slope 2. It is driven by the user's operation. The winch device 10 includes a pair of left and right winch bodies 20, a rectangular case 12 that houses the winch body 20, and a pair of left and right belts 14 that are wound or unwound 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, and the wheelchair S corresponds to the pulling object 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 is flat and inclined to the rear in front of the rear opening 1k. A floor surface 1f is formed. 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 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 winch device 10 is provided on the inner wall surface of the vehicle 1 in the vicinity of the rear opening 1k. The operation unit 17 is supported by a remote controller oscillator (not shown) and a free switch (not shown).

<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 mainspring 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 projecting portion of the rotation shaft 23 and meshes with the small gear 52 as shown in FIG. Here, FIG. 3 (B) represents the BB arrow view (IIIB-IIIB arrow view of FIG. 2) of FIG. 3 (A).
The small gear 52 is a gear that is rotated by a motor (not shown) that is a winding drive source, and is rotatably supported by a support shaft 23p that is fixed to the reel storage cover 25 in a state parallel to the rotation shaft 23. ing. As a result, when the rotation of the motor 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. 3B) or in the belt winding direction (right). Around).
The motor is configured to be able to rotate in the belt feeding direction or the belt winding direction when an engine control unit (ECU not shown) of the vehicle 1 operates in response to a signal from the remote control oscillator.

As shown in FIG. 3B or the like, a plurality of (five in the figure) rectangular openings 54 curved in an arc shape are formed in the drive side rotation gear 50 at equal intervals surrounding the through hole 51 of the rotation shaft 23. Has been. The rectangular opening 54 penetrates in a direction parallel to the rotation shaft 23, and the front side surface 501k of the rectangular opening 54 when the drive side rotation gear 50 rotates in the belt winding direction (the right rotation direction in FIG. 3B). A rear side surface 502k is formed in parallel to the rotation shaft 23 (see FIGS. 3 and 4). The power transmission protrusions 44 of the intermediate member 40 can be fitted into or detached from the square openings 54.
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 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. A plurality of through holes 31h (see FIG. 2) are formed in the reel side rotating gear 31 at equal intervals so as to surround the rotating shaft 23, and the reel side protrusions 42 of the intermediate member 40 are formed in these through holes 31h. It is fitted from the outside (left side in FIG. 2). Both side surfaces of the through-hole 31h in the rotation direction are formed in parallel to the rotation shaft 23 of the reel-side rotation gear 31.
In addition, a large number of saw-toothed teeth 31w (see FIG. 2) are formed on the outer peripheral surface of the reel-side rotating gear 31, and the hooks (not shown) of the lock member are engaged with these teeth 31w. Thus, the reel 22 is held in the rotation locked state. When the above-described free switch is pushed, a lock release solenoid (not shown) is operated by a signal from the engine control unit (ECU), and the lock member moves in a direction to release the rotation lock.

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 3A, 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. 3A, 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 formed in parallel with both rotation directions of the intermediate member 40.

Further, the disk portion 41 of the intermediate member 40 is formed with a power transmission projection 44 on a surface 41 f facing the drive side rotation gear 50. As described above, the power transmission protrusion 44 is a protrusion configured to be fitted to or detached from the rectangular opening 54 of the driving side rotation gear 50, and is arranged so as to be equal to the rectangular opening 54. Is formed.
The power transmission projection 44 is a block-like projection having a planar shape (see FIG. 4B) substantially equal to the rectangular opening 54 of the drive side rotation gear 50, and its side shape is shown in FIG. Thus, it is formed in an oblique trapezoidal shape. In other words, the power transmission protrusion 44 has a front inclination in which the front surface when the intermediate member 40 rotates in the belt winding direction (the right rotation direction in FIG. The rear surface is a rear vertical surface 44 b formed in parallel to the rotation shaft 23 of the intermediate member 40.

Then, in a state where the power transmission projection 44 of the intermediate member 40 is engaged with the rectangular opening 54 of the drive side rotation gear 50, as shown in FIG. Is in surface contact with the rear side surface 502k of the square opening 54 located on the rear 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 rear vertical surface 44b of the power transmission projection 44 and the rectangular opening 54 are provided. Due to the engagement with the rear side surface 502k, both 44 and 54 rotate together. The position of the intermediate member 40 when the power transmission protrusion 44 of the intermediate member 40 is engaged with the rectangular opening 54 of the drive side rotation gear 50 is referred to as a fitting position of the present invention.
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 gently inclined front inclined surface 44f of the power transmission projection 44 and its The intermediate member 40 is displaced in the axial direction (upward in FIG. 4A) while the intermediate member 40 is displaced in the axial direction (upward in FIG. 4A) while the front side surface 501k of the rectangular opening 54 located on the front side slides relative to the end of the reel side rotation gear 40 side. The member 40 rotates relative to the drive side rotation gear 50k, and the power transmission projection 44 is detached from the square opening 54 (see FIG. 4A). That is, the front inclined surface 44f of the power transmission projection 44 and the edge of the front side surface 501k of the square opening 54 constitute the cam mechanism of the present invention.
Thus, in a state in which the power transmission protrusion 44 of the intermediate member 40 is engaged with the rectangular opening 54 of the drive side rotation gear 50 (see FIG. 3A), the intermediate member 40 with respect to the drive side rotation gear 50 is used. Rotation in the belt winding direction is allowed but rotation in the feeding direction is restricted. The position of the intermediate member 40 when the power transmission projection 44 is detached from the rectangular opening 54 is referred to as a fitting release position of the present invention.
Further, as shown in FIG. 2 and the like, the intermediate member 40 is placed around the base end portion 23m of the rotary shaft 23 at a position between the intermediate member 40 and the reel-side rotary gear 31. A coil spring 49 biased so as to press in the direction is mounted.

<About the fitting regulation mechanism 60>
A fitting restriction mechanism 60 is provided on the front side of the drive side rotation gear 50, that is, on the side opposite to the intermediate member 40.
In the fitting restricting mechanism 60, the power transmission projection 44 of the intermediate member 40 is actuated by a cam mechanism (a front inclined surface 44 f of the power transmission projection 44 and a front side surface 501 k of the square opening 54) to form a rectangular opening of the drive side rotation gear 50. It is a mechanism for holding the intermediate member 40 in the mating release position when it is detached from the 54.
As shown in FIG. 5, the fitting restriction mechanism 60 includes a fitting restriction board 61, a fitting restriction solenoid 63, and an operation member 65.
The fitting restricting panel 61 is a disk-shaped member configured to cover from the center of the driving side rotating gear 50 to the square opening 54, and is provided at the center of the back surface 61b facing the front surface 50f of the driving side rotating gear 50. As shown in FIGS. 5B and 5C, a fitting shaft 61p protruding in the axial direction is formed. Then, the fitting shaft 61p of the fitting regulating board 61 is fitted into a central hole 23h (see FIG. 2) formed in the base end portion 23m of the rotating shaft 23 in a state where the fitting shaft 61p is relatively rotatable and can be displaced in the axial direction. ing. That is, the fitting restricting board 61 is held coaxially with the driving side rotation gear 50 and is allowed to move in the axial direction.
Further, on the rear surface 61 b of the fitting restricting board 61, a fitting restricting protrusion 62 configured to be fitted to the square openings 54 is formed on the outer peripheral edge corresponding to the square openings 54 of the drive side rotation gear 50. Is provided.

The fitting restricting protrusions 62 are square blocks having a planar shape equal to the square openings 54, and are formed in the same number as the square openings 54. Further, the protrusion dimension of the fitting restricting protrusion 62 is set to a value equal to the thickness dimension of the drive side rotation gear 50, that is, the depth dimension of the square opening 54. Further, as shown in FIG. 3A, the fitting restricting projection 62 of the fitting restricting board 61 is engaged with the rectangular opening 54 of the driving side rotating gear 50 by the power transmitting projection 44 of the intermediate member 40. In this state, all the square openings 54 are shallowly fitted from the opposite side of the power transmission projection 44. Then, in the state where the fitting restricting projection 62 of the fitting restricting plate 61 is shallowly fitted with the square opening 54 from the opposite side of the power transmitting projection 44, the fitting restricting plate 61 is the driving side rotating gear. 50 and can be rotated together.
As described above, the position of the fitting restriction board 61 when the fitting restriction projection 62 is shallowly fitted to the rectangular opening 54 of the drive side rotation gear 50 is called a fitting allowable position. The position of the fitting regulation board 61 when the projection 62 is completely fitted with the rectangular opening 54 of the drive side rotation gear 50 is referred to as a fitting regulation position. As described above, since the protrusion dimension of the fitting restricting protrusion 62 is set to a value equal to the depth dimension of the rectangular opening 54, the fitting restricting protrusion 62 is completely engaged with the square opening 54. In this state, the front end surface 62f of the fitting restricting protrusion 62 is flush with the back surface 50b of the drive side rotation gear 50.
Further, a frustoconical protrusion 61e is formed in the center on the surface side of the fitting restricting board 61, and a ring-shaped plane 61f perpendicular to the axis of the fitting restricting board 61 is formed around the protrusion 61e. Yes. Here, the axial length dimension (protrusion dimension) of the frustoconical protrusion 61e is set equal to the distance from the fitting allowable position to the fitting restricting position.

The operation member 65 of the fitting restricting mechanism 60 is a member for receiving the driving force of the fitting restricting solenoid 63 to press the fitting restricting board 61 in the axial direction from the fitting allowable position to the fitting restricting position. As shown in FIG. 5A, the operation member 65 is in contact with the conical surface of the protrusion 61e of the fitting restricting plate 61 and the ring-shaped flat surface 61f where the pressing portion 67 at the tip (upper end) is at the fitting allowable position. It is arranged vertically in contact. The vicinity of the base end portion 65k (lower end portion 65k) of the operation member 65 is rotatably connected to a support member 25s fixed to the reel storage cover 25 by a support pin 66. Here, the support member 25 s is formed in parallel to the drive side rotation gear 50, and the support pin 66 is positioned in parallel to the axis of the drive side rotation gear 50. Therefore, the operation member 65 can rotate around the support pin 66 along the support member 25s in parallel with the drive side rotation gear 50. Further, a fitting restriction solenoid 63 fixed to the support member 25 s is connected to the base end portion 65 k of the operation member 65 at the front lower side of the operation member 65.
The fitting restricting solenoid 63 is configured to pull the base end portion 65k of the operation member 65 with an electromagnetic force by energization and press the base end portion 65k of the operation member 65 with a force of a spring 63b when the energization is released. Yes. For this reason, when the fitting regulating solenoid 63 is energized and pulls the base end portion 65k of the operating member 65, the operating member 65 rotates counterclockwise around the support pin 66 to the position of the two-dot chain line in FIG. . As a result, the pressing portion 67 of the operation member 65 moves in a direction perpendicular to the axis of the fitting restriction board 61 (in the radial direction of the fitting restriction board 61). When the fitting regulating solenoid 63 is de-energized and presses the base end portion 65k of the operation member 65, the operation member 65 rotates right around the support pin 66 and moves to the position indicated by the solid line in FIG. Position).
Here, the operation member 65 is provided with a positioning lever 65s that contacts the protrusion 61e of the fitting restriction board 61 to position the operation member 65 at the original position. A rotation guide mechanism 65z that guides the operation member 65 from rotating in parallel with the drive-side rotation gear 50 is provided between the operation member 65 and the support member 25s.

As shown in FIGS. 5 (A) and 5 (B), the pressing portion 67 at the tip of the operating member 65 has an inclined surface that can abut on the conical surface of the protrusion 61e of the fitting restricting plate 61 at the fitting allowable position. 67m and a flat surface 67f capable of contacting the ring-shaped flat surface 61f are formed.
With the above configuration, in a state where the power transmission projection 44 of the intermediate member 40 is detached from the rectangular opening 54 of the drive side rotation gear 50, the fitting regulating solenoid 63 is energized to move the operation member 65 to the support pin 66. When it is rotated counterclockwise, the inclined surface 67m of the pressing portion 67 of the operating member 65 presses the conical surface of the protrusion 61e of the fitting restricting plate 61 in the fitting allowable position from the radial direction (FIG. 5B). reference). As a result, the inclined surface 67m of the operation member 65 and the conical surface of the protrusion 61e of the fitting restricting plate 61 slide relative to each other, and the conical surface pressing force of the operating member 65 is changed by the sliding action. It is converted into an axial pressing force against. That is, the inclined surface 67m of the operating member 65 and the conical surface of the protrusion 61e of the fitting restricting board 61 constitute the cam mechanism of the present invention.
As a result, in the process in which the operation member 65 rotates counterclockwise around the support pin 66, the fitting restricting board 61 moves from the fitting allowable position to the fitting restricting position direction (axial direction), and the fitting restricting board 61 is fitted. The alignment restricting protrusion 62 is inserted deeper into the rectangular opening 54 of the drive side rotation gear 50. Then, when the fitting restricting board 61 moves to the fitting restricting position and the inclined surface 67m of the operation member 65 deviates from the conical surface of the protrusion 61e of the fitting restricting board 61, the rotation of the operation member 65 causes FIG. As shown in (C), the flat surface 67f of the operation member 65 comes into surface contact with the tip flat surface of the protrusion 61e of the fitting restriction board 61, and the fitting restriction board 61 is pressed from the axial direction. As a result, the fitting restricting board 61 is held at the fitting restricting position, and the front end face 62 f of the fitting restricting protrusion 62 is flush with the rear face 50 b of the drive side rotation gear 50.
In this state, even if a pressing force in the direction of the fitting allowable position is applied from the fitting regulating panel 61 to the pressing portion 67 of the operating member 65, the pressing force is applied to the fitting regulating solenoid via the operating member 65. No participation in 63.

The fitting restricting solenoid 63 is configured such that when the free switch is pushed and operated, the motor and the driving side rotation gear 50 rotate relative to the intermediate member 40 in the belt feeding direction in response to a signal from the engine control unit (ECU). After the 40 power transmission projections 44 are disengaged from the rectangular openings 54 of the drive side rotation gear 50, energization is performed in response to a signal from the engine control unit (ECU).
That is, the drive side rotation gear 50 described above 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. 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 power transmission mechanism of the present invention. Further, the coil spring 49 corresponds to the urging means of the present invention, and the rectangular opening 54 of the drive side rotation gear 50 corresponds to the through hole in the present invention. The fitting restricting board 61 of the fitting restricting mechanism 60 corresponds to a fitting restricting member of the present invention, and the fitting restricting solenoid 63 corresponds to a fitting restricting drive source of the present invention. The engine control unit (ECU) corresponds to the control means of the present invention.

<Operation of the winch device 10>
Next, the operation of the 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 of the operation unit 17, the unlocking solenoid is energized by a signal from the engine control unit (ECU), and the reel 22 is unlocked. Further, the motor rotates the drive side rotation gear 50 in the belt feeding direction for a predetermined time by a signal from the engine control unit (ECU). At this time, the reel 22 is biased in the belt winding direction by the spring force of the mainspring 27, so that the reel side rotation gear 31 and the intermediate member 40 rotate in the belt winding direction with respect to the drive side rotation gear 50. 6A to 6D, the front inclined surface 44f of the power transmission projection 44 of the intermediate member 40 slides on the edge of the front side surface 501k of the square opening 54 of the drive side rotation gear 50. The intermediate member 40 is displaced in the axial direction from the fitting position to the fitting release position against the spring force of the coil spring 49. As a result, the power transmission projection 44 of the intermediate member 40 is detached from the rectangular opening 54 of the drive side rotation gear 50.

Next, the fitting regulating solenoid 63 is energized by a signal from the engine control unit (ECU). As a result, the operation member 65 of the fitting restriction mechanism 60 rotates counterclockwise around the support pin 66 to the position of the two-dot chain line in FIG. Then, in the process in which the operating member 65 rotates counterclockwise, the inclined surface 67m of the pressing portion 67 of the operating member 65 presses the conical surface of the protrusion 61e of the fitting restricting board 61 in the fitting allowable position from the radial direction (FIG. 5 (B)). As a result, due to the sliding action between the inclined surface 67m of the operating member 65 and the conical surface of the protrusion 61e of the fitting restricting plate 61, the fitting restricting plate 61 is moved in the axial direction from the fitting allowable position to the fitting restricting position direction. The fitting restricting protrusion 62 of the fitting restricting board 61 is inserted into the rectangular opening 54 of the drive side rotation gear 50. Then, the front end face 62 f of the fitting restricting projection 62 of the fitting restricting board 61 is held flush with the rear face 50 b of the drive side rotation gear 50. Then, the tip flat surface of the protrusion 61 e of the fitting restriction board 61 is pressed from the axial direction by the pressing portion 67 of the operation member 65.
In this state, relative rotation between the reel 22 side (reel 22, reel-side rotation gear 31 and intermediate member 40) and the motor side (motor, small gear 52 and drive-side rotation gear 50) becomes 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, the energization restriction solenoid 63 of the engagement restriction mechanism 60 is de-energized, and the operation member 65 rotates right around the support pin 66 to return to the original position. It is returned to (solid line position in FIG. 5A). As a result, the pressing portion 67 of the operation member 65 is disengaged from the protrusion 61e of the fitting restriction board 61, and the fitting restriction board 61 can return from the fitting restriction position to the fitting allowable position. As a result, the intermediate member 40 is moved in the direction of the drive-side rotation gear 50 by the spring force of the coil spring 49, and the power transmission protrusion 44 of the intermediate member 40 pushes out the fitting restriction protrusion 62 of the fitting restriction board 61. However, it is fitted into the rectangular opening 54 of the drive side rotation gear 50. That is, rotation in the belt winding direction on the reel 22 side (reel 22, reel-side rotation gear 31 and intermediate member 40) relative to the motor side (motor, small gear 52 and drive-side rotation gear 50) is allowed but in the feeding direction. The rotation to is in a restricted state.

Further, when the up button of the remote control transmitter is pressed, the motor rotates in the belt winding direction while the up button is pressed. Thereby, the rotation of the motor 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 stops when the assistant releases the ascending button of the remote control transmitter. Further, when the motor is stopped, the energization of the unlocking solenoid is released, the lock member moves in a direction to engage with the teeth 31w of the reel side rotation gear 21, and 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, 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.

When the wheelchair S is alighted, as described above, after the wheelchair slope 2 is deployed and preparations for alighting are completed, the assistant presses the lowering button of the remote control transmitter to energize the unlocking solenoid and the reel 22 The rotation lock of is released.
Further, when the lowering button of the remote control transmitter is pressed, the motor rotates in the belt feeding direction while the lowering button is pressed. Thereby, the rotation of the motor is transmitted to the drive side rotation gear 50 via 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. Therefore, when the wheelchair S freely descends or the assistant pulls the wheelchair S backward, the left and right belts 14 are fed out from the reel 22 against the spring force of the mainspring 27, and the wheelchair S descends along the wheelchair slope 2. To do. Note that the motor is temporarily stopped and the connecting member is removed from the wheelchair S in a state where the belt 14 is slightly extended and the forward pulling force on the connecting member is released. When the wheelchair S reaches the road surface, the motor stops when the assistant releases the lowering button of the remote control transmitter. Further, the energization of the unlocking solenoid is released and the reel 22 is rotationally locked.
Next, the free switch is pushed to energize the unlocking solenoid and the fitting restricting solenoid 63 of the fitting restricting mechanism 60. 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.

<Advantages of the vehicle winch device 10 according to the present embodiment>
In the winch device 10 according to the present embodiment, the intermediate member 40 is rotatably engaged with the reel-side rotation gear 31, and the power transmission protrusion 44 is connected to the drive-side rotation gear 50 while maintaining this engaged state. It is configured to be able to move between a fitting position where it is fitted into the square opening 54 and a fitting release position where it is detached from the square opening 54. Further, the intermediate member 40 is pressed toward the fitting position by the coil spring 49. For this reason, the power transmission projection 44 of the intermediate member 40 is fitted into the rectangular opening 54 of the drive side rotation gear 50 by the spring force of the coil spring 49, so that the reel side rotation gear 31 extends in the belt feeding direction with respect to the drive side rotation gear 50. Rotation is regulated. As a result, when the motor rotates in the winding direction, the rotation is transmitted to the reel 22 via the drive side rotation gear 50, the intermediate member 40, and the reel side rotation gear 31, and the belt is wound around the reel 22 and the wheelchair S is rotated. Rises. When the motor rotates in the feeding direction, the belt 14 is pulled by the gravity of the wheelchair S, and the reel 22 and the reel-side rotating gear 31 rotate in the feeding direction within a range not exceeding the rotational speed of the driving-side rotating gear 50. The wheelchair S descends.
That is, since the power transmission protrusion 44 of the intermediate member 40 is engaged with the square opening 54 of the drive side rotation gear 50, both the 44 and 54 are engaged in the rotation direction so as to transmit the rotation. Rotation can be reliably transmitted from the gear 50 to the reel-side rotation gear 31.
Further, when the power transmission projection 44 of the intermediate member 40 is detached from the rectangular opening 54 of the drive side rotation gear 50, the engine control unit (ECU) operates the motor in the belt feeding direction for a predetermined time to make the reel side rotation gear. The drive-side rotation gear 50 is rotated in the belt feeding direction with respect to 31 and the intermediate member 40 is moved to the fitting release position against the coil spring 49. After the intermediate member 40 is moved to the mating release position, the power transmission protrusion 44 of the intermediate member 40 is separated from the rectangular opening 54 of the drive side rotation gear 50, and then the operation member is operated by the operation of the fitting regulating solenoid 63. 65 moves to the direction which pushes the fitting control board 61 to a fitting control position. As a result, the fitting restricting protrusion 62 of the fitting restricting board 61 is fitted into the rectangular opening 54 of the driving side rotating gear 50, and the front end face 62 f of the fitting restricting protrusion 62 is the back surface 50 b of the driving side rotating gear 50. And become the same. As a result, the reel-side rotation gear and the drive-side rotation gear 50 can rotate relative to each other, and the belt 14 can be fed out from the reel 22 with the motor stopped.
As described above, after the power transmission projection 44 of the intermediate member 40 is detached from the square opening 54 of the drive side rotation gear 50, the fitting restriction projection 62 of the fitting restriction board 61 is moved to the square opening of the drive side rotation gear 50. Because of the configuration to be fitted to 54, the force by which the coil spring 49 pushes the intermediate member 40 is not applied to the fitting restriction board 61 while the fitting restriction board 61 is moved to the fitting restriction position. Therefore, the driving force of the fitting restricting solenoid 63 can be reduced, and the fitting restricting solenoid 63 can be reduced in size and power consumption can be reduced.
Further, the operation member 65 that pushes the fitting restricting panel 61 to the fitting restricting position is operated by a cam mechanism (the inclined surface 67m of the operating member 65 and the conical surface of the protrusion 61e of the fitting restricting board 61). It is the structure which moves to the direction which cross | intersects the rotating shaft of 61, and pushes the fitting regulation board 61 to an axial direction. Therefore, the reaction force from the fitting restricting panel 61 acts on the operation member 65 only in the direction parallel to the rotation axis, and the reaction force is applied to the fitting restriction solenoid 63 via the operation member 65. Don't join. Therefore, even if the driving force of the fitting restricting solenoid 63 is reduced, the fitting restricting protrusion 62 of the fitting restricting board 61 at the fitting restricting position is pushed back by the power transmitting protrusion 44 of the intermediate member 40. There is no problem.

<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 the present embodiment, an example in which the through-hole-shaped square opening 54 is formed in the drive-side rotation gear 50 has been shown, but the square opening 54 can also be formed in a notch shape.
In addition, after the power transmission protrusion 44 of the intermediate member 40 is separated from the square opening 54 of the drive side rotation gear 50, the fitting restriction protrusion 62 of the fitting restriction board 61 is formed in the square opening 54 of the drive side rotation gear 50. Although an example of fitting is shown, it is also possible to simultaneously perform the detachment of the power transmission protrusion 44 from the rectangular opening 54 and the fitting restriction protrusion 62 to the rectangular opening 54.
In the present embodiment, the front transmission surface 44f is formed on the power transmission projection 44, and the intermediate member 40 rotates in the belt winding direction (rightward in FIG. 3A) with respect to the drive side rotation gear 50. The configuration in which the front inclined surface 44f of the power transmission projection 44 and the edge of the front side surface 501k of the square opening 54 are slid relative to each other and the power transmission projection 44 is detached from the square opening 54 is illustrated. However, it is also possible to form the front side surface 501k of the square opening 54 as an inclined surface without forming the front inclined surface 44f on the power transmission projection 44.

It is a perspective view (A figure, B figure) showing the use condition of the winch apparatus which concerns on Embodiment 1 of this invention. It is a longitudinal section showing a winch body of a winch device. FIG. 3 is a plan sectional view (A view) showing a fitting operation between the intermediate member and the drive side rotation gear, and a view taken along arrow BB in FIG. A (view taken along arrow IIIB-IIIB in FIG. 2). FIG. 5 is a plan sectional view (A view) showing a fitting release operation of the intermediate member and the drive side rotation gear, and a view taken along the line BB in FIG. They are a front view (A figure) showing a fitting regulation mechanism, a plane sectional view (B figure (BB sectional view of A figure), C figure) showing operation of a cam mechanism of a fitting regulation mechanism. It is a schematic diagram (A figure, B figure, C figure, D figure) showing the fitting cancellation | release process of an intermediate member and a drive side rotation gear.

Explanation of symbols

S Wheelchair (towed object)
2 Wheelchair slope 14 Belt (traction member)
14f connecting portion 20 winch main body 22 reel 27 mainspring (reel biasing means)
31 Reel-side rotating gear (reel-side rotating member power transmission mechanism)
40 Intermediate member (power transmission mechanism)
44 Power transmission projection 44f Front inclined surface (cam mechanism)
49 Coil spring (biasing means)
50 Drive-side rotating gear (Drive-side rotating member, power transmission mechanism)
54 Square opening (through hole)
501k Front side (cam mechanism)
60 Fitting restriction mechanism 61 Fitting restriction panel (fitting restriction member)
61e Projection (cam mechanism)
62 Protrusion for fitting restriction 63 Solenoid for fitting restriction (drive source for fitting restriction)
65 Operation member 67 Press part (cam mechanism)

Claims (1)

A pulling member connectable to a pulling object, a reel capable of winding and unwinding the pulling member, a reel biasing means for biasing the reel in the winding direction, a winding drive source, and the winding A winch device comprising a power transmission mechanism for transmitting power in a winding direction of a traction member of a drive source to the reel,
The power transmission mechanism is
A drive-side rotating member that is rotatably arranged on the winding drive source side and has a through-hole or notch that penetrates in a direction parallel to the rotation axis;
A reel-side rotating member disposed coaxially with the driving-side rotating member so as to be rotatable on the reel side;
A power transmission protrusion is disposed between the drive side rotation member and the reel side rotation member and protrudes toward the drive side rotation member, and is engaged with the reel side rotation member so as to be rotatable together therewith. While the engagement state is maintained, between the fitting position where the power transmission protrusion fits into the through-hole or notch of the driving-side rotating member and the fitting release position where the projection is separated from the through-hole or notch In the mating position, the reel-side rotating member in the pulling-out direction of the reel-side rotating member with respect to the driving-side rotating member is engaged by the engagement between the power transmission protrusion and one side surface in the rotational direction of the through hole or notch. The rotation of the reel side rotating member in the winding direction of the reel side rotating member with respect to the driving side rotating member is formed between the power transmission protrusion and one side surface in the rotation direction of the through hole or notch. Cam mechanism An intermediate member which permits while moving to the serial mating release position,
Biasing means for biasing the intermediate member toward the fitting position;
For fitting regulation, which is arranged on the opposite side of the intermediate member with the driving side rotating member in between, and fits into the through hole or notch of the driving side rotating member so as to rotate integrally with the driving side rotating member. The drive side rotation has such a degree that the driving force transmitting projection can be fitted into the through hole or notch while the fitting restricting projection maintains the fitted state to the through hole or notch. Fitting restriction approaching the drive side rotation member such that the fitting allowable position away from the member and the front end surface of the fitting restriction projection are flush with the surface of the drive side rotation member on the intermediate member side A fitting restricting member movable between positions;
The fitting restricting member is movable in a direction intersecting with the rotation axis, and by moving in one direction, the fitting restricting member is pushed to generate a moving force to the fitting restricting position. An operation member constituting a cam mechanism with the fitting regulating member so that a reaction force from the fitting regulating member acts only in a direction parallel to the rotation axis;
A fitting restricting drive source for moving the operating member;
When the operation member moves in the one direction by the operation of the fitting restricting drive source, or before that, the take-up drive source is operated in a pulling member feeding direction for a predetermined time so that the reel-side rotating member is moved. Control means for rotating the drive side rotation member in the pulling member feed-out direction and moving the intermediate member to the fitting restriction position;
A winch device comprising:

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