JP5459193B2 - Vehicle lift device - Google Patents

Description

  The present invention relates to a lift device installed in, for example, a rear opening of a vehicle, and relates to, for example, a lift device used for getting on and off a wheelchair and lifting and lowering a load.

This type of lift device is, for example, a flat platform having an area on which a wheelchair can be mounted, and the platform is moved up and down while maintaining a horizontal posture between the vehicle interior and the road surface outside the vehicle compartment through the vehicle rear opening. An elevating mechanism is provided, and a strip-type flapper is usually provided at the rear of the platform. The flapper is supported so as to be pivotable up and down along the rear part of the platform, and is held in a stowed position stood upward to restrict the movement of the wheelchair when the platform is raised and lowered and in the passenger compartment. In the state where the platform is lowered out of the passenger compartment, the platform is rotated to a take-out position that protrudes almost horizontally rearward from the rear of the platform, absorbing the step between the platform and the road surface, and the road surface of the wheelchair. Acts as a slope to ease movement to and from the platform.
Conventional techniques relating to this flapper are disclosed in the following patent documents. The following Patent Document 1 discloses a flapper configured to be stored in a standing position by manual operation of a caregiver and to be taken out to a substantially horizontal position. Patent Documents 2 and 3 disclose a flapper that can be taken out and stored by a seated person sitting on a wheelchair by operating a lever. Patent Document 4 discloses a flapper that can be taken out and stored by a caregiver's pedaling operation.
As described above, in addition to a flapper that is rotated up and down by a direct manual operation of a caregiver or rotated up and down by a lever operation of a seated person or the like, it is rotated up and down electrically. Electric flappers for storing and taking out are known. According to this electric flapper, a seated person or a caregiver can easily store and take out the flapper only by a switch operation, and therefore, the usability of the flapper and thus the lift device can be further improved.

JP 2002-316573 A JP 2001-95851 A JP 2002-307998 A JP 2002-307999 A

However, the above-mentioned electric flapper may be stored and taken out by manual operation. In such a case, when a caregiver or the like rotates the flapper up and down by manual operation, the electric motor and the deceleration motor are accompanied accordingly. The gear train may be rotated by an external force, and as a result, high-frequency harsh noise may be generated. In this respect, it is necessary to improve operability.
SUMMARY OF THE INVENTION An object of the present invention is to improve the operability when an electric motor flapper is stored and taken out by using an electric motor as a drive source.

The above problem is solved by the following invention.
1st invention is a lift apparatus provided with the platform which can mount an elevating thing, and the raising / lowering mechanism which raises / lowers this platform between a vehicle opening part and a road surface. The lift device includes a flapper supported so as to be rotatable between a retracted position standing upward along the rear part of the platform and a take-out position protruding rearward, and the flapper as a retracted position using an electric motor as a power source. A flapper drive device that rotates between the take-out position and the take-out position is provided. This flapper drive device is operated by manual operation in a power connection state in which the flapper is rotated by a power system using a rotation output of the electric motor as a power source, and in a motor-free state in which the power system is disconnected and unrelated to the electric motor. It has a configuration that can be switched to a power-disengaged state that can be moved.
According to the first aspect of the present invention, the flapper driving device can be switched to the power disconnected state, so that the flapper can be manually rotated without being separated from the electric motor. The flapper can be stored and taken out without generating unpleasant noise such as high-frequency sound, and the operability of the flapper can be enhanced in this respect.
According to a second invention, in the first invention, the flapper is supported so as to be capable of lateral movement along the direction of the rotational axis, and the power connection state and power are controlled by laterally operating the flapper in the direction of the rotational axis. The lift device is configured to switch the separation state.
According to the second invention, it is possible to switch to the power disconnected state with a simple operation, and in this respect, the operability of the flapper can be further enhanced.
According to a third invention, in the second invention, the flapper is a lift device urged toward the power connection side with respect to the lateral movement in the rotation axis direction. According to the third aspect of the invention, the flapper can be easily stored and taken out by electric operation at any time. When switching from the power connected state to the power disconnected state, a simple operation of moving the flapper against the urging force is sufficient, and the operability of the flapper can be improved in this respect.
A fourth invention is the lift device according to the second or third invention, wherein the flapper is held in the power disconnected state when the flapper is rotated 5 ° toward the take-out position while being moved laterally.
According to the fourth aspect of the invention, if the flapper is moved laterally and then rotated 5 ° to the take-out position side, the flapper is held in the power disconnected state, and thereafter, the lateral movement operation is canceled and the flapper is taken out. In this respect, the operability of the flapper in the power disconnected state can be improved.

According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the flapper driving device includes a driving cam plate that is rotated by an electric motor, and approaches the driving cam plate in the axial direction. A driven cam plate portion that is supported so as to be separable, and a lock lever that locks the flapper in a retracted position by engaging the driven cam plate portion and restricting its rotation. Is brought into a power connection state by bringing the cam plates close to the driving cam plate and integrating the two cam plates with respect to rotation around the axis, while the driven cam plate is separated from the driving cam plate in the axial direction. By making the lever cam plates rotatable relative to each other, the power is disconnected, and in the former power connection state, the lock lever is locked by relative rotation of the driving cam plate with respect to the driven cam plate in a certain angle range. Condition is A structure and the lifting device to be divided.
According to the fifth invention, the power connection state and the power disconnection state are switched by displacing the driven cam plate portion in the axial direction with respect to the drive cam plate portion. In the former power connection state, the drive side cam plate portion is provided so as to be relatively rotatable with respect to the driven side cam plate portion within a certain angle range, and the lock lever is automatically unlocked using this relative rotation. Is done. After the drive side cam plate part rotates relative to the driven side cam plate part by a certain angle range, both the cam plate parts are integrated with respect to rotation, and the flapper is taken out from the storage position to the take out position by electric drive. When the flapper is rotated from the retracted position to the take-out position in the power connection state in which the driven cam plate is brought close to the drive cam plate in this way, the drive cam plate becomes the driven cam plate. On the other hand, the lock state at the retracted position of the flapper is automatically released by relative rotation within a certain angle range. For this reason, it is not necessary for a wheelchair seated person or a caregiver thereof to manually perform the unlocking operation of the lock lever, and in this respect, higher operability can be realized with a simple configuration.
In a sixth aspect based on the fifth aspect, an engagement convex portion is provided on one of the drive side cam plate portion and the driven side cam plate portion, and an engagement concave portion into which the engagement convex portion is fitted is provided on the other side. The drive side cam plate portion is brought close to the driven side cam plate portion and the engagement convex portion is made to enter the engagement concave portion, so that both cam plate portions are integrated with respect to rotation to be in a power connection state, In this lift device, the driven cam plate is separated from the driving cam plate and the engaging convex portion is separated from the engaging concave portion so that both cam plates are separated from each other for rotation to be in a power disconnected state.
According to the sixth invention, both cam plates have a simple configuration in which the engagement convex portion is provided on one of the mutually facing surfaces of the drive side cam plate portion and the driven side cam plate portion and the engagement concave portion is provided on the other side. It is possible to switch between a power connection state integrated with respect to the rotation of the part and a power disconnection state separated with respect to the rotation of both cam plate parts.

It is a perspective view of the vehicle rear part provided with the lift apparatus which concerns on embodiment of this invention. It is the (II) part enlarged view of FIG. 1, Comprising: It is a left view of a flapper drive device. It is a longitudinal cross-sectional view of a flapper drive device. This figure has shown the power connection state. It is a longitudinal cross-sectional view of a flapper drive device. This figure shows the power disconnected state. It is a left view of a flapper drive device, Comprising: It is a figure which shows the positional relationship of a drive side cam board part and a driven side cam board part. This figure shows a state in which the flapper is locked at the storage position. It is a left view of a flapper drive device, Comprising: It is a figure which shows the positional relationship of a drive side cam board part and a driven side cam board part. This figure shows a state where the locked state at the retracted position of the flapper is released by electric drive in the power connection state. It is a left view of a flapper drive device, Comprising: It is a figure which shows the positional relationship of a drive side cam board part and a driven side cam board part. This figure shows a state where the flapper is taken out to the take-out position by electric drive in the power connection state. It is a left view of a flapper drive device, Comprising: It is a figure which shows the positional relationship of a drive side cam board part and a driven side cam board part. This figure shows a state in which the flapper is taken out to the take-out position by manual operation in the power disconnected state. It is a left view of a flapper drive device, Comprising: It is a figure which shows the positional relationship of a drive side cam board part and a driven side cam board part. This figure shows a state in which the driving cam plate portion starts to idle relative to the driven cam plate portion when the flapper taken out by manual operation in the power disconnected state is electrically returned to the storage position side. It is a left view of a flapper drive device, Comprising: It is a figure which shows the positional relationship of a drive side cam board part and a driven side cam board part. This figure shows the state immediately before the engaging convex part of the driving cam plate part engages with the engaging concave part of the driven cam plate part when the flapper taken out by manual operation in the power disconnected state is electrically returned to the storage position side. Shows the state. It is a left view of a flapper drive device, Comprising: It is a figure which shows the positional relationship of a drive side cam board part and a driven side cam board part. This figure shows the state immediately before the flapper is rotated by the drive side cam plate and the driven side cam plate when the flapper taken out by manual operation in the power disconnected state is returned to the storage position by electric drive. Indicates the state. It is a left view of the flapper drive device concerning a 2nd embodiment of the present invention. This figure differs from FIG. 2 in that a power system disconnecting arm is provided on the lock lever.

Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a lift device 1 according to a first embodiment described below. The lift device 1 is installed in the rear opening 3 of the vehicle 2. The lift device 1 has a flat platform 10 having an area capable of mounting a wheelchair 4 as a lifting object, and the platform 10 through a rear opening 3 between a vehicle interior and a road surface outside the vehicle compartment in a horizontal posture. A lifting mechanism 5 that lifts and lowers while holding is provided. When the rear gate 3a provided at the rear portion of the vehicle 2 is flipped upward, the rear opening 3 is opened. The elevating mechanism 5 has a configuration in which the tip ends of elevating arms 5a and 5a mainly composed of a pair of left and right four-joint link mechanisms installed on the vehicle floor 2a are coupled to slide mechanisms 5b provided on the left and right sides of the platform 10, respectively. I have. By this elevating mechanism 5, the platform 10 can be translated up and down in a horizontal posture and can be slid forward and backward along the vehicle floor 2a.
As shown in FIG. 1, with the wheelchair 4 mounted on the platform 10 taken out on the road surface, the left and right elevating arms 5a and 5a are moved upward to raise the platform 10 to the height of the vehicle floor 2a. After that, or when the right and left slide mechanisms 5b and 5b are operated to the front slide side at an appropriate timing during ascending, the platform 10 is horizontally moved to the front side (vehicle interior side) and stored at a position along the vehicle floor 2a. . When the platform 10 is taken out from the passenger compartment on the road surface, the left and right slide mechanisms 5b and 5b are first moved to the rear slide side to horizontally move the platform 10 backward, and then the right and left slide mechanisms 5b and 5b are moved at an appropriate timing during or after the slide. The elevating arms 5a, 5a are moved downward to lower the platform 10 to the road surface.
A flapper 11 for facilitating movement of the wheelchair 4 between the platform 10 and the road surface is provided at the rear part of the platform 10. For this reason, the flapper 11 is mainly used in a state where the platform 10 is lowered on the road surface. The flapper 11 has a band plate shape and is supported so as to be rotatable about an axis along the rear portion of the platform 10. The flapper 11 is stowed upward and a take-out position projecting rearward from the rear portion of the platform 10. It is provided so that it can be pivoted up and down. The flapper 11 is electrically driven and is turned up and down by the flapper drive device 20 and can be turned up and down by manual operation after being separated from the power system of the flapper drive device 20.

Details of the flapper drive 20 are shown in FIG. The flapper driving device 20 is provided on the left side of the rear end of the platform 10. The flapper drive device 20 includes a base 21 attached to the left side of the rear end of the platform 10 and an electric motor 22 as a drive source attached to the base 21. A pinion gear 23 attached to the output shaft of the electric motor 22 is engaged with an idler gear 24 having a larger diameter. The idle gear 24 is rotatably supported via a support shaft 24 a provided on the base 21. The idle gear 24 is meshed with the driven gear 25. As shown in FIGS. 3 and 4, the driven gear 25 is rotatably supported via a stepped support boss portion 26 provided on the base 21. When the electric motor 22 is started, the driven gear 25 rotates through the meshing of the pinion gear 23 and the idle gear 24.
The support boss portion 26 is provided with a large-diameter large-diameter support shaft portion 26a and a smaller-diameter small-diameter support shaft portion 26b that are coaxially and integrally provided. A driven gear 25 is rotatably supported on the large-diameter support shaft portion 26a via a bearing 26c.
The driven gear 25 is integrally provided with a drive side cam plate portion 27. As shown in FIG. 5, one unlocking cam portion 27 a is provided on the peripheral surface 27 b of the driving cam plate portion 27. Further, one engagement convex portion 28 is provided on the side surface of the drive side cam plate portion 27.

As shown in FIGS. 3 and 4, a flapper left bracket 30 attached to the flapper 11 is rotatably supported on the small-diameter support shaft portion 26 b of the support boss portion 26. The flapper left bracket 30 includes a bracket portion 31, a support shaft portion 32, and a driven cam plate portion 33. The bracket portion 31 is fixed along the left side portion of the flapper 11. A support shaft portion 32 is provided at a lower portion of the bracket portion 31 so as to protrude sideways. A small-diameter support shaft portion 26b of the support boss portion 26 is inserted and supported in the inner peripheral hole 32a of the support shaft portion 32 through a bearing 26d so as to be relatively rotatable and relatively displaceable in the axial direction. A driven cam plate portion 33 is provided integrally with the left end portion of the support shaft portion 32. As shown in FIG. 5, one stopper recess 33 a is provided on the peripheral surface 33 b of the driven cam plate portion 33. When the lock claw portion 36a of the lock lever 36 is fitted into the stopper recess 33a, the rotation of the driven cam plate portion 33 and the flapper 11 is locked. The position of the stopper recess 33a in the circumferential direction is set so that the flapper 11 is locked at the stowed position stood upward. The peripheral surface 33b of the driven cam plate portion 33 and the peripheral surface 27b of the drive side cam plate portion 27 are formed with substantially the same diameter. For this reason, as shown in FIG. 5, both peripheral surfaces 33b and 27b will be in a substantially coincident state in a side view.
As shown in FIG. 2, the lock lever 36 is supported by the base 21 via a support shaft 36b so as to be tiltable in the front-rear direction. A tension spring 37 is interposed between the lock lever 36 and the base 21. The lock lever 36 is urged by the tension spring 37 toward the lock side (in the direction of tilting backward) in which the lock claw 36 a is inserted into the stopper recess 33 a of the driven cam plate portion 33. When the lock lever 36 rotates against the tension spring 37 as shown by a two-dot chain line in FIG. 2, the lock claw 36a is extracted from the stopper recess 33a and the driven cam The plate portion 33 can rotate about the axis J, and therefore the flapper 11 can be rotated to the lower take-out position side.
As shown in FIGS. 3 and 4, the lock claw portion 36 a of the lock lever 36 has a plate thickness dimension straddling both the circumferential surfaces 27 b and 33 b of the drive side cam plate portion 27 and the driven side cam plate portion 33. Yes. For this reason, with respect to the relative positions in the rotational direction of the drive side cam plate portion 27 and the driven side cam plate portion 33, as shown in FIG. 5, the lock release cam portion 27 a of the drive side cam plate portion 27 and the driven side cam plate portion 33. Only when the stopper recess 33a coincides with the rotation direction, the lock claw 36a enters the stopper recess 33a and is locked at the retracted position where the flapper 11 stands up.

As shown in FIG. 2, with respect to the tilting position of the lock lever 36, the locking position for locking the flapper 11 to the storage position, the unlocking position for releasing the lock at the storage position of the flapper 11, An intermediate lock position for locking only the rotation is set. In FIG. 2, the lock lever 36 at the lock position is indicated by a solid line and indicated by a reference symbol (LC), and the lock lever 36 at the unlock position is indicated by a two-dot chain line and indicated by a reference symbol (UL). Further, the lock lever 36 at the intermediate lock position located approximately in the middle between the lock position and the unlock position is also indicated by a two-dot chain line and is denoted by a reference numeral (ML).
In a state where the lock lever 36 is located at the lock position (LC), the lock claw portion 36a enters the stopper recess 33a of the driven cam plate portion 33 in a substantially close contact state, and moves backward and forward of the flapper 11. The tilted position is locked in the standing position locked completely. When the lock lever 36 is tilted to the unlock position (UL) after passing through the intermediate lock position (ML), the lock claw 36a is completely detached from the stopper recess 33a, and the rear of the flapper 11 It will be in the unlocked state where rotation to is permitted.
When the lock lever 36 is tilted to the intermediate lock position (ML), the lock claw portion 36a is slightly separated from the rear portion of the stopper recess 33a to generate a clearance, and the flapper 11 has a slight angle corresponding to this clearance. While tilting forward is permitted, tilting backward is regulated in the same manner as the lock position (LC). The intermediate lock position (ML) is used only when the platform 10 is stored in the vehicle interior side. When the platform 10 is stored in the vehicle compartment and the platform 10 is slid forward by the slide mechanisms 5b and 5b, the platform 10 is locked at the rear portion of the platform 10 as shown by a two-dot chain line in FIG. The slide roller 5c of the slide mechanism 5b is located in the vicinity of the lever 36. On the other hand, a stopper rod 36c is provided at the rear portion of the lock lever 36 so as to protrude rearward of the slide roller 5c. When the lock lever 36 is tilted to the intermediate lock position (ML), the stopper rod 36c comes into contact with the slide roller 5c, and the tilt of the lock lever 36 to the unlock position (UL) is restricted. For this reason, in a state where the platform 10 is stored in the vehicle interior, the lock lever 36 restricts the rotation of the flapper 11 to the rear, while the lock lever 36 is tilted to the intermediate lock position (ML) to operate the flapper. 11 can be tilted forward by a slight angle. By holding the flapper 11 in the forward position where the flapper 11 is tilted to the front side at a slight angle in the passenger compartment, the backward movement of the wheelchair 4 from the platform 10 is more reliably regulated. The flapper 11 is moved forward so that the urging force of the tension spring 37 acts in the direction in which the driving cam plate 27 is rotated counterclockwise in FIG. 2 (the flapper 11 is moved forward) via the lock claw 36a. Held by.

One engagement recess 35 is provided on the side surface of the driven cam plate portion 33. The engagement recess 35 is formed in a long groove shape along an arc centered on the rotation axis of the driven cam plate portion 33, and the width thereof is an engagement convexity of the drive cam plate portion 27 on the driven gear 25 side. The dimension is set such that the portion 28 can be inserted. The drive side cam plate part 27 on the driven gear 25 side and the driven side cam plate part 33 on the flapper left bracket 30 side are opposed to or in contact with each other in a rotatable state. As shown in FIG. 3, in a state where the driving side cam plate portion 27 and the driven side cam plate portion 33 are in contact with each other, the engaging convex portion 28 of the driving side cam plate portion 27 is engaged with the driven side cam plate portion 33. The state enters the recess 35. In this approach state, the driving side cam plate portion 27 and the driven side cam plate portion 33 can be relatively rotated only within a certain angular range (the angular range in which the engaging convex portion 28 can move within the engaging concave portion 35). It becomes a state.
As shown in FIG. 3, when the engaging convex portion 28 enters the engaging concave portion 35, the driving cam plate portion 27 rotates relative to the driven cam plate portion 33, so that the engaging convex portion 28 is moved. Only in this state, the rotational power on the driven gear 25 side is in contact with the front end portion (extraction side end portion 35a) or the rear end portion (storage side end portion 35b) of the engaging recess 35, and the flapper left bracket 30 side and hence the flapper. 11 is the transmission state of the power system transmitted to the 11 side.
Further, as shown in FIG. 5, in the state where the engaging convex portion 28 is in contact with the latter storage side end portion 35b, the unlocking cam portion 27a coincides with the stopper concave portion 33a so as to be within the stopper concave portion 33a of the lock claw portion 36a. The flapper 11 is locked at the retracted position. On the other hand, as shown in FIG. 6, the driving cam plate portion 27 rotates relative to the driven cam plate portion 33 from the position shown in FIG. When the portion 28 comes into contact with the front end portion (extraction side end portion 35a) of the engaging recess portion 35, the lock release cam portion 27a is relatively displaced in the rotation direction with respect to the stopper recess portion 33a. It is pushed out from the stopper recess 33a by the side of the unlocking cam portion 27a, so that the lock lever 36 rotates to the unlock side. The lock claw portion 36a pushed out from the stopper recess 33a is pressed across both the peripheral surface 27b of the driving cam plate portion 27 and the peripheral surface 33b of the driven cam plate portion 33 so that the lock lever 36 is unlocked. Retained.
The drive side cam plate portion 27 and the driven side cam plate portion 33 are rotated relative to each other within a certain angular range, and then are in a transmission state of a power system integrated with respect to the rotation, so that the driving force of the flapper drive device 20 is transmitted via the driven gear 25. The flapper 11 is transmitted to the driven cam plate portion 33 and rotated up and down electrically.

As shown in FIGS. 3 and 4, a flapper right bracket 40 is attached to the right side portion of the rear end of the flapper 11. The flapper right bracket 40 includes a bracket portion 41 and a support shaft portion 42. The bracket portion 41 is fixed along the right side portion of the flapper 11. A support shaft portion 42 is provided at a lower portion of the bracket portion 41 so as to protrude sideways. The support shaft portion 32 of the flapper left bracket 30 and the support shaft portion 42 of the flapper right bracket 40 are provided coaxially on the axis J.
The support shaft portion 42 of the flapper right bracket 40 is rotatable to the inner peripheral hole 45a of the cylindrical support boss portion 45 attached to the right end portion of the platform 10 via the two bearings 42a and 42a and is axially relative to it. Insertion is supported in a displaceable state. A compression spring 44 is interposed around the support boss portion 45 and between the bracket portion 41 of the flapper right bracket 40 and the flange portion 45b of the support boss portion 45. The compression spring 44 biases the flapper 11 in the direction in which the flapper 11 is displaced to the left side, and the driven cam plate portion 27 on the driven gear 25 side is in contact with the driven cam plate portion 33 on the flapper left bracket 30 side. ing.
As described above, the flapper 11 is supported on the rear portion of the platform 10 in a state of being rotatable around the axis J through the support shaft portion 32 of the flapper left bracket 30 and the support shaft portion 42 of the flapper right bracket 40. Moreover, the flapper 11 is supported so as to be laterally movable by a slight distance (about 6 mm in the present embodiment) to the right side against the compression spring 44. The lateral movement of the flapper 11 can be performed manually by a wheelchair seated person or a caregiver.
As shown in FIG. 4, when the flapper 11 is laterally moved to the right against the compression spring 44, the driven cam plate portion 33 of the flapper left bracket 30 is separated from the drive cam plate portion 27 on the driven gear 25 side. The engaging convex portion 28 is disengaged from the inside of the mating concave portion 35, whereby the flapper left bracket 30 is separated from the driven gear 25 for rotational operation, and the flapper 11 is separated from the power system of the flapper driving device 20 and rotated up and down. It becomes "power separation state" that can be.
On the other hand, as shown in FIG. 3, when the flapper 11 is not laterally moved to the right side against the compression spring 44, the flapper 11 is pushed to the left side by the compression spring 44 and the driven cam plate portion of the flapper left bracket 30 is moved. 33 is pressed against the drive side cam plate portion 27 on the driven gear 25 side, and as a result, the engagement convex portion 28 is inserted into the engagement concave portion 35. In this state, the driving side cam plate portion 27 on the driven gear 25 side and the driven side cam plate portion 33 on the flapper left bracket 30 side rotate together except for a certain angular range, and accordingly, the flapper driving device 20 causes the flapper 11 to rotate. Is in a “power connection state” that is electrically stored and taken out.

First, the operation of the flapper drive device 20 in the latter power connection state will be described. The operation of storing and taking out the flapper 11 by the operation of the flapper driving device 20 is performed only when the platform 10 is taken out to the height of the road surface outside the passenger compartment.
FIG. 5 shows the flapper driving device 20 in the storage lock state in which the flapper 11 is locked at the storage position where the flapper 11 stands upward. In the retracted lock state of the flapper 11, the lock claw 36 a of the lock lever 36 is fitted in both the unlock cam portion 27 a of the driving cam plate portion 27 and the stopper recess 33 a of the driven cam plate portion 33. It has become. Therefore, in this state, as shown in the drawing, the engaging convex portion 28 of the driving side cam plate portion 27 is in contact with the storage side end portion 35 b of the engaging concave portion 35 of the driven side cam plate portion 33. Further, in this storage lock state, the flapper 11 is returned to the left position shown in FIG. 3, whereby the driven cam plate portion 33 is pressed against the drive side cam plate portion 27 to enter the engagement recess 35. It is in the power connection state in which the engagement convex part 28 entered.
When the flapper drive switch on the operation panel (not shown) is turned on in the retracted lock state shown in FIG. 5 to start the flapper drive device 20 to the takeout side, the driven gear 25 is driven by the rotational output of the electric motor 22 as shown in FIG. The drive-side cam plate portion 27 rotates to the take-out side indicated by the white arrow in the drawing, and accordingly the engagement convex portion 28 is engaged from the position where it contacts the storage-side end portion 35b of the engagement concave portion 35. The inside of the recess 35 is displaced forward and comes into contact with the take-out side end 35a. During this time, the drive side cam plate portion 27 idles with respect to the driven side cam plate portion 33. When the drive cam plate 27 is idled in the clockwise direction shown in the drawing, the lock release cam 27a is displaced in the same direction with respect to the stopper recess 33a, so that the lock claw 36a of the lock lever 36 is unlocked. It is pushed up by the side portion of the cam portion 27a and pushed out of the stopper recess 33a. Therefore, the lock lever 36 is rotated to the unlock side against the tension spring 37, and the lock state of the flapper 11 in the retracted position is automatically set. Is released.
Thus, the lock of the lock lever 36 is released by the idling of the drive side cam plate portion 27 with respect to the driven side cam plate portion 33, and the engagement convex portion 28 comes into contact with the take-out side end portion 35a of the engagement concave portion 35. The drive side cam plate portion 27 and the driven side cam plate portion 33 are integrated with respect to the rotation on the take-out side. For this reason, after the locked state of the flapper 11 in the retracted position is released, the drive cam plate 27 and the driven cam plate 33 are rotated integrally by the rotation output of the electric motor 22 as shown in FIG. 11 rotates around the axis J to the take-out side, and finally is taken out almost horizontally from the rear part of the platform 10 to the rear and taken out to the take-out position grounded on the road surface. During this time, the lock claw portion 36 a of the lock lever 36 is held in a state where it is pressed across both the peripheral surface 27 b of the driving cam plate portion 27 and the peripheral surface 33 b of the driven cam plate portion 33.
In this way, when the flapper 11 is taken out to the take-out position where the tip end side is grounded to the road surface through the steps shown in FIGS. 5 to 6, the overload applied to the electric motor 22 is detected and the electric motor is concerned. 22 is stopped. Thus, a series of flapper removal operations by the flapper driving device 20 is completed.

In order to store the extracted flapper 11, the flapper storage switch of the operation panel is turned on, and the flapper driving device 20 is activated to the storage side. When the flapper driving device 20 is activated to the retracted side, the drive cam plate portion 27 is idled by a fixed angle toward the retracted side in the counterclockwise direction in FIG. As a result, the engagement convex portion 28 is returned to the state in contact with the storage side end portion 35 b of the engagement concave portion 35. Thus, the idling of the driving cam plate portion 27 with respect to the driven cam plate portion 33 eliminates the positional deviation of the unlocking cam portion 27a with respect to the stopper recess portion 33a, so that the locking lever 36 is placed in the stopper recess portion 33a. The lock claw 36a is returned to a state where it can enter.
After the drive-side cam plate portion 27 idles to the storage side from the take-out state shown in FIG. 7 and the engagement convex portion 28 comes into contact with the storage-side end portion 35b of the engagement concave portion 35, the electric motor 22 continues. Due to the rotation output, the cam plate portions 27 and 33 are integrally rotated to the storage side, whereby the flapper 11 starts to rotate to the storage side (standing direction). Lock claw portions 36a are slidably contacted with the peripheral surfaces 27b and 33b of both cam plate portions 27 and 33, and the lock lever 36 is held in the unlock position. When the cam plates 27 and 33 are integrally rotated to the storage side and the flapper 11 reaches the storage position, the lock claw portion 36a is fitted into the stopper recess 33a by the urging force of the tension spring 37 acting on the lock lever 36. Thus, the flapper 11 is locked at the storage position. When the flapper 11 is locked at the storage position, an overload applied to the electric motor 22 is detected and the electric motor 22 is stopped. Thus, the flapper 11 is returned to the storage lock state shown in FIG. 5, and a series of flapper storage operations by the flapper driving device 20 is completed.

As described above, the flapper 11 of the first embodiment can be taken out and stored electrically by the flapper driving device 20 using the electric motor 22 as a drive source, and can also be taken out and stored by manual operation as described below. . Note that, as in the case of electric operation, the flapper 11 is made only when the platform 10 is taken out on the road surface outside the passenger compartment.
In order to take out the flapper 11 in the storage lock state by manual operation, the lock lever 36 is tilted to the unlock position (UL) by manual operation. This unlocking operation is performed against the urging force of the tension spring 37. When the lock lever 36 is unlocked, the lock claw 36 a is extracted from the stopper recess 33 a of the driven cam plate 33. However, at this stage, since the engagement convex portion 28 of the drive side cam plate portion 27 enters the engagement concave portion 35 of the driven cam plate portion 33, the flapper 11 is rotated to the take-out side as it is. And high-frequency sound of the electric motor 21 and the reduction gear train are generated. Therefore, in the present embodiment, as shown in FIG. 4, the flapper 11 is moved to the right side to separate the driven cam plate portion 33 from the driving cam plate portion 27 in the direction of the axis J, thereby separating the power. be able to. The operation of moving the flapper 11 to the right is performed against the compression spring 44.
In this power decoupled state, the flapper 11 can freely rotate up and down via the small-diameter support shaft portion 26b of the left support boss portion 26 and the right support boss portion 45. Therefore, from the power system of the flapper drive device 20 It can be taken out to the take-out position in a separated motor-free state. As shown in FIG. 8, after the flapper 11 is rotated to the take-out position, even if the unlocking operation of the lock lever 36 is released, the lock claw portion 36a is slidably contacted with the peripheral surface 33b of the driven cam plate portion 33. Thus, the lock lever 36 is held in the unlock position. Further, when the flapper 11 is rotated to the take-out position in the power disconnected state, the engaging convex portion 28 of the driving cam plate portion 27 is detached from the engaging concave portion 35 of the driven cam plate portion 33. The engagement convex portion 28 is pressed against the side surface of the driven cam plate portion 33 by the urging force of the compression spring 44, and the separated state of the driven cam plate portion 33 with respect to the drive side cam plate portion 27 is maintained. In this way, the engagement convex portion 28 is slidably contacted with the side surface of the driven cam plate portion 33 and the power separation state is maintained, so that the lateral movement operation of the flapper 11 to the right side is performed at a fixed angle ( In this embodiment, it becomes unnecessary when it is rotated backward by about 5 °), and even after the lateral movement operation is canceled, the flapper 11 is maintained in a power disconnected state thereafter. When the flapper 11 is rotated to the take-out position in this power disconnected state, the driven cam plate portion 33 is integrated with the flapper 11 in a state where the engagement convex portion 28 is in sliding contact with the side surface of the driven cam plate portion 33. Rotate with.

Thus, the flapper 11 taken out to the take-out position by manual operation can be electrically returned to the storage position by the flapper driving device 20 in addition to manual operation. When the flapper storage switch of the operation panel is turned on, the flapper drive device 20 is activated to the storage side, and the drive side cam plate portion 27 rotates counterclockwise as shown in FIGS. At this stage, the engaging convex portion 28 of the driving side cam plate portion 27 is slidably contacted with the side surface of the driven side cam plate portion 33, so that the separated state of both the cam plate portions 27 and 33 is maintained. The cam plate portion 27 idles with respect to the driven cam plate portion 33. During this idling, the position and size of the engaging convex portion 28 are set so that the engaging convex portion 28 is always in sliding contact with the side surface of the driven cam plate portion 33, and into the stopper concave portion 33a. Fitting is avoided.
When the drive side cam plate portion 27 idles in the counterclockwise direction as shown in FIG. 11, the engagement convex portion 28 fits into the engagement concave portion 35 of the driven side cam plate portion 33 as shown in FIG. Thereafter, the engaging convex portion 28 comes into contact with the storage-side end portion 35b of the engaging concave portion 35, and at this time, both the cam plate portions 27 and 33 are integrated with respect to rotation. Therefore, the driving cam plate portion 27 and the driven cam plate portion 33 are integrally rotated counterclockwise in FIG. 11 by the rotation output of the electric motor 22, so that the flapper 11 is rotated in the upright direction and stored. Returned to When the flapper 11 is returned to the retracted position, the lock claw 36a of the lock lever 36 is fitted into the stopper recess 33a by the urging force of the tension spring 37, whereby the flapper 11 is locked in the retracted position (see FIG. (State shown in FIG. 5).
As shown in FIG. 8, when the flapper 11 taken out by manual operation in the power disconnected state is returned to the storage position by manual operation, the driven cam plate portion 33 is connected to the flapper 11 while the drive side cam plate portion 27 is stopped. The flapper 11 is returned to the retracted position when the engaging projection 28 is fitted into the engaging recess 35 as shown in FIG. Accordingly, the lock claw 36a is fitted into the stopper recess 33a, and the flapper 11 is returned to the storage lock state in which it is locked at the storage position.

According to the lift device 1 provided with the flapper drive device 20 of the first embodiment configured as described above, the flapper drive device 20 moves the flapper 11 laterally to switch to the power disconnected state. Since the flapper 11 can be separated and rotated by manual operation, the flapper 11 can be stored and taken out without generating unpleasant noise such as high-frequency sound of an electric motor or a reduction gear train as in the prior art, In this respect, the operability of the flapper 11 can be improved.
Further, the flapper 11 can be switched to the power disconnected state by a simple operation of moving the flapper 11 against the compression spring 44, and the operability of the flapper 11 can be further enhanced in this respect.
Furthermore, since the flapper 11 is always held in the power connection state by the compression spring 44, the operability during the electric operation in the power connection state with high use frequency can be improved.
Further, in the power connection state, when the drive side cam plate portion 27 rotates relative to the driven side cam plate portion 33 within a certain angle range, the lock lever 36 is automatically tilted to the unlock position, and the flapper 11 The locked state at the storage position is automatically released. For this reason, it is not necessary for the seated person of the wheelchair 4 or the caregiver thereof to manually perform the unlocking operation of the lock lever 36. In this respect, the operability of the flapper 11 can be further improved.
Further, when the flapper 11 is taken out from the power connection state to the manual operation state, the unlocking operation of the lock lever 36 and the two operations of moving the flapper 11 to the right side are required. An inadvertent operation of a person can be prevented beforehand.

Various modifications can be made to the first embodiment described above. For example, the configuration has been illustrated in which the driven cam plate portion 33 is separated from the drive cam plate portion 27 and switched to the power disconnected state by laterally moving the flapper 11 to the right side by manual operation. For example, as shown in FIG. As described above, when the power system disconnecting arm portion 50 is provided below the lock lever 36 and the lock lever 36 is tilted largely forward to the power system disconnecting position (SL) through the unlock position (UL) by manual operation. After the lock claw portion 36a is released from the stopper recess 33a and the retracted lock state of the flapper 11 is released, the power system disconnecting arm portion 50 is further connected between the drive side cam plate portion 27 and the driven side cam plate portion 33. 4 to move the driven cam plate portion 33 away from the drive side cam plate portion 27, so that the flapper 11 moves laterally to the right and moves as shown in FIG. Can be cut switched configuration to the cut-off state. According to the flapper drive device according to the second embodiment, when the flapper 11 is manually removed, the lock lever 36 is tilted to the foremost power system disconnecting position (SL) and the flapper 11 is in the retracted locked state. The release operation and the power system disconnection operation are continuously performed, and the operability of the flapper drive device 20 can be further enhanced in this respect.
In the case of the second embodiment, in the power connection state, the lock lever 36 tilts to the unlock position (UL) and does not tilt to the power system disconnect position (SL), so the power system disconnect arm 50 is driven. It does not reach until it enters between the side cam plate portion 27 and the driven side cam plate portion 33, and therefore the power connection state is maintained.

Further modifications can be made to the first or second embodiment. For example, the configuration in which the flapper driving device 20 is provided in the left rear portion of the platform 10 is illustrated, but the present invention can also be applied to the case in which the flapper driving device is provided in the right rear portion of the platform 10. In this case, a configuration may be adopted in which the flapper is laterally moved to the left to switch to the power disconnected state.
Further, the cam plate portions 27 and 33 are rotated by the engagement / disengagement state of the engagement convex portion 28 and the engagement concave portion 35 provided on the mutually facing surfaces of the drive side cam plate portion 27 and the driven side cam plate portion 33. Although it is configured to switch between an integrated power connection state and a power disconnection state that is disconnected with respect to the rotation of the cam plates 27 and 33, for example, instead of the engaging convex portion 28 and the engaging concave portion 35, for example, a driving cam plate Surface gears are provided on the mutually facing surfaces of the drive portion and the driven cam plate portion, and the movement of the driven cam plate portion in the axis J direction causes the surface gears to mesh with each other or release the engagement to establish a power connection state. It is good also as a structure which switches with a tilting system isolation | separation state.
Furthermore, a spline shaft portion is provided on one of the drive side cam plate portion and the driven side cam plate, and a spline hole through which the spline shaft portion is engaged and disengaged is provided on the other side. The connection state and the power disconnection state may be switched.
Further, when the flapper 11 is moved laterally and rotated to the take-out side by an angle of about 5 °, the engagement convex portion 28 of the drive side cam plate portion 27 is brought into sliding contact with the side surface of the driven side cam plate portion 33 and the flapper concerned. 11 illustrates a configuration in which the power 11 is held in a power disconnected state, and as a result, the lateral movement operation can be subsequently released and the flapper 11 can be rotated to the lower take-out position. 28 or the circumferential length of the engaging recess 35 or the like can be changed to a smaller angle, or to a larger angle.
Furthermore, although the wheelchair 4 has been illustrated as a lift mounted on the platform 10, the flapper 11 and the flapper device 20 illustrated on a lift device for mounting and lifting a general load such as a cardboard box on the platform 10, for example. It can also be applied.

DESCRIPTION OF SYMBOLS 1 ... Lift apparatus 2 ... Vehicle, 2a ... Vehicle floor 3 ... Rear opening part, 3a ... Rear gate 4 ... Wheelchair 5 ... Lifting mechanism, 5a ... Lifting arm, 5b ... Slide mechanism, 5c ... Slide roller 10 ... Platform 11 ... Flapper J ... Axis (Flapper rotation axis)
DESCRIPTION OF SYMBOLS 20 ... Flapper drive device 21 ... Base 22 ... Electric motor 23 ... Pinion gear 24 ... Idle gear 24a ... Support shaft 25 ... Driven gear 26 ... Support boss part 26a ... Large diameter support shaft part, 26b ... Small diameter support shaft part, 26c ... Bearing , 26d ... bearing 27 ... drive side cam plate part, 27a ... unlocking cam part, 27b ... peripheral surface 28 ... engagement convex part 30 ... flapper left bracket 31 ... bracket part 32 ... support shaft part, 32a ... inner peripheral hole 33 ... driven side cam plate part, 33a ... stopper recess, 33b ... peripheral surface 35 ... engagement recess, 35a ... take-out side end part, 35b ... storage side end part 36 ... lock lever, 36a ... lock claw part, 36b ... support shaft 36c ... Stopper rod 37 ... Tension spring LC ... Lock position, UL ... Unlock position, ML ... Intermediate lock position SL ... Power system disconnection position 40 ... Flapper right bracket 41 ... bracket portion 42 ... supporting shaft, 42a ... bearing 44 ... compression spring 45 ... support boss portion, 45a ... inner peripheral hole, 45b ... flange portion 50 ... power system disconnect arm

Claims (5)

A lift device including a platform on which a lift can be mounted, and a lift mechanism that lifts and lowers the platform between a vehicle opening and a road surface,
A flapper supported so as to be rotatable between a retracted position standing upward along the rear part of the platform and a takeout position protruding rearward, and the electric motor as a power source for the flapper to the retracted position and the takeout position. A flapper drive device that rotates between
The flapper is supported so as to be capable of lateral movement along its rotational axis direction, and by operating the lateral movement of the flapper in the rotational axis direction,
The flapper drive device can be manually rotated in a power connection state in which the flapper is rotated by a power system using a rotation output of the electric motor as a power source and in a motor-free state separated from the power system. The lift device is configured to be switchable to a power disconnected state. The lift device according to claim 1 , wherein the flapper is urged toward the power connection side with respect to lateral movement in the rotation axis direction. The lift device according to claim 1 or 2 , wherein the flapper is held in the power disconnected state when the flapper is rotated 5 ° toward the take-out position in a state in which the flapper is laterally moved. A lifting apparatus according to any one of claim 1 to 3, wherein the flapper driving device includes a driving-side cam plate rotated by the electric motor, the axial direction relative to the drive side cam plate portion A driven cam plate portion that is supported so as to be able to approach and be separated, and a lock lever that engages the driven cam plate portion and restricts its rotation to lock the flapper in the retracted position,
The driven cam plate portion is brought close to the drive cam plate portion to integrate the cam plate portions with respect to rotation around the axis, thereby bringing the driven cam plate portion into the power connection state. The power-separated state is established by separating the drive-side cam plate portion from the drive-side cam plate portion in the axial direction so that both the cam-plate portions can rotate with each other, and in the power-connected state, the driven-side cam plate of the drive-side cam plate portion. A lift device configured to release the lock state of the lock lever by relative rotation with respect to the portion. 5. The lift device according to claim 4 , wherein an engagement convex portion is provided on one of the drive side cam plate portion and the driven cam plate portion, and an engagement concave portion into which the engagement convex portion is fitted is provided on the other side. The driven cam plate portion is brought close to the driven cam plate portion and the engaging convex portion is inserted into the engaging concave portion to integrate the two cam plate portions with respect to rotation. While the power connection state is established, the driven cam plate portion is separated from the driving concave cam plate portion and the engaging convex portion is separated from the engaging concave portion to separate the two cam plate portions with respect to rotation. The lift apparatus which makes the said power separation state.

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