JP2018079297A - Stair lift - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive stair lift allowing a user to easily and reliably perform lifting/lowering operations.SOLUTION: A stair lift 1 allowing a user to lift/lower stairs by a manual operation, includes: a seat part 10; and lifting/lowering drive means 20 for liftingly/loweringly driving the seat part 10. The lifting/lowering drive means 20 includes: an endless conveyance body 23b that is wound around a drive pulley 21b and a driven pulley 22b and can convey the seat part 10 along the stairs; an ascent lever 27b rotationally connected to a drive shaft 25 of the drive pulley 21b via a first ratchet mechanism; and a descent handle 29 rotatably connected to the drive shaft 25 via a worm mechanism and a second ratchet mechanism.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a stair lifting device, and more particularly to a stair lifting device that allows a user to lift a stair by manual operation.

  As a conventional stair lifting device, for example, a configuration disclosed in Patent Document 1 is known. This apparatus includes elevating means including an elevating table on which a user can board, and driving means for driving the elevating means by a user's handle operation. An auxiliary force is applied to the elevator platform when the handle is raised by the connected weight, and when the handle stops, the elevator platform is maintained in a stopped state by the worm mechanism.

JP 2005-239289 A

  In the above conventional apparatus, since it is necessary to balance the weight of the weight that generates the auxiliary force when ascending with the weight of the user or the like who is on the lifting platform, a heavy weight is necessary. There is a problem that the installation work tends to be complicated. This also increases the weight of the entire apparatus, and there is a problem that the manufacturing cost increases in order to ensure sufficient strength.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a stair lifting device that allows a user to easily and reliably perform a lifting operation and has a low manufacturing cost.

  The object of the present invention is a stair lifting device that allows a user to move up and down a stair by a manual operation, and includes a riding part and a lifting drive means for driving the riding part to move up and down. The means includes a drive pulley and a driven pulley, an endless transport body that is wound around the drive pulley and the driven pulley and can transport the mounting portion along a staircase, and a first drive shaft of the drive pulley. The first ratchet includes: a lifting lever that is rotatably connected via a ratchet mechanism; and a lowering handle that is rotatably connected to the drive shaft via a worm mechanism and a second ratchet mechanism. The mechanism has switching means capable of switching forward and reverse of the turning direction of the lifting lever that transmits the rotational force to the drive pulley, and the worm mechanism receives the rotational force of the lowering handle. Transmitted to the ratchet mechanism of the second ratchet mechanism, the driving pulley is achieved by stair lift device for transmitting a rotational force of the lowering handle in a direction to lower the sole plate.

  In this stair lifting device, the riding section can include a seating section on which a user can sit, and the lifting lever and the first ratchet mechanism are provided on both sides of the seating section, respectively. Can be configured.

  Moreover, it can be set as the structure by which the engagement block of the triangle shape of the side view was provided in multiple numbers along the longitudinal direction on the outer surface side of the said conveyance body. The engaging block has a plurality of convex portions that respectively engage with a plurality of groove portions formed at intervals in the longitudinal direction of the transport body, and a part of the plurality of convex portions is in the groove portion. It is preferable to be fixed to. In this configuration, it is preferable to further include a pressing plate that presses the inner surface side of the carrier toward the stairs.

  Moreover, it is preferable to further include an abutting member that protrudes downward from the mounting portion and has a tip portion that abuts on the floor surface below the floor.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to perform a raising / lowering operation easily and reliably, a user can provide the stair raising / lowering apparatus with low manufacturing cost.

It is a side view of the stair lifting device according to an embodiment of the present invention. It is a schematic front view of the stair lifting device shown in FIG. It is a principal part enlarged view of the stair lifting apparatus shown in FIG. It is a side view for demonstrating the action | operation in the raising of the stair lifting apparatus shown in FIG. It is a side view for demonstrating the action | operation after the raising of the stair lift apparatus shown in FIG. It is a side view for demonstrating the action | operation in the descent of the stair raising / lowering apparatus shown in FIG. It is a side view of the stair raising / lowering apparatus which concerns on other embodiment of this invention. It is a side view which shows the other use condition of the stair lifting apparatus shown in FIG. It is a side view which shows the further another use condition of the stair raising / lowering apparatus shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a side view of a stair lifting device according to an embodiment of the present invention, and FIG. 2 is a front view of the stair lifting device shown in FIG. In FIG. 2, some components are not shown in order to facilitate understanding of the configuration. As shown in FIG. 1 and FIG. 2, the stair lifting device 1 is supported by frames 2 a and 2 b with a mounting portion 10 on which a user can ride and a lifting drive 20 that drives the mounting portion 10 to move up and down. Has been configured.

  The mounting part 10 is provided with a seating part 11 on which both sides are supported by support plates 3a and 3b attached to the frames 2a and 2b so that a user can sit. The riding part 10 is not necessarily limited to a seatable configuration, and may be, for example, a cage-like configuration in which a user is standing or riding with a wheelchair.

  The lifting / lowering drive unit 20 includes drive pulleys 21a and 21b and driven pulleys 22a and 22b provided on both left and right sides of the mounting portion 10, and an endless belt wound around the drive pulleys 21a and 21b and the driven pulleys 22a and 22b. Shaped transport bodies 23a and 23b. The left and right drive pulleys 21a and 21b and the left and right driven pulleys 22a and 22b are connected by a drive shaft 25 and a rotary shaft 26 that penetrate the frames 2a and 2b, respectively. The inner surfaces of the portions located below the transport bodies 23a and 23b are pressed by the pressing plates 4a and 4b fixed to the frames 2a and 2b. The drive pulleys 21a and 21b, the driven pulleys 22a and 22b, and the transport bodies 23a and 23b are not necessarily limited to those of the present embodiment. For example, the transport bodies 23a and 23b are formed in an endless chain shape, 21b and driven pulleys 22a and 22b may be chain wheels or the like.

  The elevating drive 20 further includes elevating levers 27 a and 27 b provided on both the left and right sides of the mounting portion 10. The lifting levers 27a and 27b are rotatably connected at one end to the drive shaft 25 via the first ratchet mechanisms 28a and 28b. When rotating in the forward direction, the first ratchet mechanisms 28a and 28b are connected. The drive shaft 28b engages with the ratchet pawl, and the drive shaft 25 fixed to the drive gear rotates. On the other hand, when rotating in the reverse direction, the engagement between the drive gear and the ratchet pawl is released. It idles with respect to the drive shaft 25. The first ratchet mechanisms 28a and 28b are provided with switching levers 281a and 281b whose one end engages with the ratchet pawls, and are rotated to the driving pulleys 21a and 21b via the driving shaft 25 by the operation of the switching levers 281a and 281b. The direction of rotation of the lifting levers 27a and 27b for transmitting power can be switched between forward and reverse. Since the configuration of the first ratchet mechanisms 28a and 28b is well known in a commercially available ratchet wrench or the like, detailed description thereof is omitted.

  The elevating drive machine 20 further includes a lowering handle 29 disposed in the vicinity of the riding section 10. The lowering handle 29 is connected to the drive shaft 25 through the worm mechanism 30 and the second ratchet mechanism 33 so as to be horizontally rotatable. The worm mechanism 30 includes a worm 31 provided at the lower end portion of the lowering handle 29 and a worm wheel 32 attached to the second ratchet mechanism 33, and the rotational force of the lowering handle 29 is controlled by the worm 31. And the worm wheel 32 are transmitted to the second ratchet mechanism 33, while the driving force from the worm wheel 32 has a self-locking function that is not transmitted to the worm 31. In the second ratchet mechanism 33, when the lowering handle 29 rotates in the forward direction, the drive gear engages with the ratchet pawl, and the drive shaft 25 fixed to the drive gear rotates, while the lowering handle 29 reverses the direction. At the time of rotation, the engagement between the drive gear and the ratchet pawl is released and the drive shaft 25 is idled.

  The transport bodies 23a and 23b are provided with a plurality of engagement blocks 24a and 24b along the longitudinal direction on the outer surface side. As shown in FIG. 3, a plurality of groove portions 231a (, 231b) are formed at intervals in the longitudinal direction on the outer surface side of the transport body 23a (, 23b), and the engagement block 24a (, 24b) And a plurality of convex portions 241a (, 241b) respectively engaged with the plurality of groove portions 231a (, 231b). The plurality of convex portions 241a (, 241b) are partly fixed to the groove portion 231a (, 231b) by welding or the like, while the other convex portions are detachable from the groove portion 231a (, 231b). Has been. In this embodiment, the front end surface 242a (, 242b) of the convex portion arranged at the center of the engagement block 24a (, 24b) is fixed to the bottom surface of the groove 231a (, 231b). With this configuration, the transport body 23a (23b) can be smoothly driven because there is no possibility that the engagement block 24a (24b) can prevent the bending when the transport body 23a (23b) passes through the driving pulley or the driven pulley. The inner surfaces of the transport bodies 23a and 23b are flat surfaces in this embodiment, but a plurality of grooves may be formed in the same manner as the outer surfaces.

  Next, the operation of the stair lifting device 1 having the above configuration will be described. As shown in FIG. 4, when the user U goes up the stairs S, the user U seated on the seating portion 11 turns his back to the stairs S so that the engagement block 24 b of the transport body 23 b is placed on the stairs S. Engage with the tread surface T. Thereafter, by rotating the raising lever 27b back and forth, the rotational force is driven via the first ratchet mechanism 28 shown in FIG. 2 when rotating in one direction (direction in which the raising lever 27b is pulled). It is transmitted to the shaft 25 and is idled when rotating in the other direction. As a result, when the drive shaft 25 rotates in one direction, the drive pulley 21b and the driven pulley 22b rotate in the direction indicated by the arrow in FIG. 4, and the engagement block 24b presses the tread surface T by the rotation of the transport body 23b. Then, the stair lift device 1 rises along the staircase S. Since the inner surface side of the transport body 23b is pressed by the pressing plate 4b and the engagement block 24b is pressed against the staircase S, the transport body 23b can surely rise along the staircase. The pressing plate 4b can be replaced with a caster or the like. Further, when a rail or the like can be installed on the staircase S, the engagement block 24b is not essential, and the stair lift device 1 can be raised by friction between the surface of the rail and the outer surface of the transport body 23. .

  The above description is for one lifting lever 27b. The other lifting lever 27a is also swung at the same timing as the one lifting lever 27b, so that the stair lifting device 1 can be moved with a small force. It can surely be raised. However, the raising lever and the first ratchet mechanism may be a single structure installed near the center of the drive shaft 25.

  In order to make it easier for the user U to get out of the seating section 11, an assisting tool that guides the seated user U to the upper part of the descending entrance may be installed at the exit of the stairs S. As shown in FIG. 5, the auxiliary tool 40 includes a substrate 41, an extension rail 42 attached to the substrate 41 so that the conveyance path continues from the stairs S, and a support member 43 that supports the extension rail 42. Yes. The substrate 41 has engaging portions 41 a and 41 b at both ends, respectively, and one engaging portion 41 a engages with the edge of the downward opening, and the other engaging portion 41 b is the lower end portion of the support member 43. Engage with. The extension rail 42 is supported in an inclined state so as to be able to move further obliquely upward after the stair lifting device 1 shown in FIG. 41b is provided at the end.

  As shown in FIG. 5, a handrail 50 extending horizontally from the side wall surface is preferably provided in the vicinity of the auxiliary tool 40, and the user U guided in a seated state on the extension rail 42 stands up with the handrail 50. be able to. Moreover, it is preferable that the board | substrate 41 and the extension rail 42 and between the extension rail 42 and the support member 43 are connected with the hinges 44 and 45 so that rotation is possible, and the auxiliary tool 40 is used when not in use. Can be folded and stored compactly.

  As shown in FIG. 6, when the user U goes down the stairs S, after operating the switching levers 281a and 281b, the lowering handle 29 is rotated. The rotational force of the lowering handle 29 is transmitted to the drive shaft 25 via the worm mechanism 30 and the second ratchet mechanism 33 shown in FIG. 2, and the drive pulley 21b and the driven pulley 22b rotate in the direction indicated by the arrow in FIG. . Thereby, the conveyance body 23b rotates, the engagement block 24b presses the kick R, and the stair lifting device 1 descends along the stair S. The first ratchet mechanisms 28a and 28b cause the drive shaft 25 to idle with respect to the lifting levers 27a and 27b by operating the switching levers 281a and 281b. In this way, the stair lifting device 1 can be smoothly lowered while using the stair lifting device 1 and the weight of the user U.

  FIG. 7 is a side view of a stair lifting device according to another embodiment of the present invention. The stair lifting device 1 shown in FIG. 7 is the same as the stair lifting device 1 shown in FIG. 1 and the like, while slightly lowering the height position of the seating portion 11 and extending the front ends of the frames 2a and 2b (see FIG. 2). Abutting members 34a and 34b formed so as to protrude downward from the mounting portion 10 are provided, and other configurations are the same as those of the stair lifting device 1 shown in FIG.

  The contact members 34a and 34b extend obliquely downward along the inclination direction of the frames 2a and 2b so as not to interfere with the staircase S when the stair lift device 1 moves up and down the staircase S. FIG. At the lowered position of the stair lifting device 1 shown, the tip portions of the contact members 34a and 34b are in contact with the floor surface F below the floor. The height of the seating part 11 is preferably such that the sole of the user U sitting on the seating part 11 naturally attaches at the lowered position shown in FIG.

  According to the stair lifting device 1 shown in FIG. 7, when the user U rises from the seating portion 11 of the stair lifting device 1 in the lowered position or when the user U sits on the seating portion 11, the contact member Since the tips of 34a and 34b abut against the floor surface F and the posture of the stair lift device 1 can be reliably maintained, the user U can easily get on and off the riding section 10. In the present embodiment, the contact members 34a and 34b are configured by a part of the frames 2a and 2b. However, the mounting members 34a and 34b can contact the floor F below the floor without interfering with the stairs S. If it is the structure which protrudes below 10, the arrangement | positioning and shape are not specifically limited.

  The stair lifting device 1 of each of the embodiments described above is configured such that the user U can ride on the mounting unit 10, but the user U mounts the staircase S by loading luggage or the like. It is possible to operate the lifting levers 27a and 27b and the lowering handle 29 from the outside of the stair lifting device 1 while walking, which is a burden on the user U as compared with the case of lifting the stair S with a heavy load. Can be greatly reduced.

  That is, when the user U climbs the stairs, as shown in FIG. 8, the user B places the luggage B on the seating portion 11 and operates the lifting levers 27 a and 27 b from below the stair lifting device 1. Thus, the luggage B can be easily carried up the stairs. On the other hand, when the user U goes down the stairs, as shown in FIG. 9, the user U operates the lowering handle 29 next to the stair lifting device 1, so that the luggage B can be safely placed below the stairs. Can carry.

DESCRIPTION OF SYMBOLS 1 Stair-climbing apparatus 4a, 4b Press board 10 Seating part 11 Seating part 20 Lifting drive machine 21a, 21b Drive pulley 22a, 22b Driven pulley 23a, 23b Carrier 231a, 231b Groove part 24a, 24b Engagement block 241a, 241b Protrusion part 25 Drive shaft 26 Rotating shafts 27a and 27b Lifting levers 28a and 28b First ratchet mechanisms 281a and 281b Switching lever 29 Lowering handle 30 Worm mechanism 31 Worm 32 Warm wheel 33 Second ratchet mechanisms 34a and 34b Contact members

Claims (5)

A stair lifting device that allows a user to manually move up and down the stairs,
A mounting section; and a lifting drive means for driving the mounting section to move up and down,
The elevating drive means includes
A driving pulley and a driven pulley;
An endless transport body that is wound around the drive pulley and the driven pulley and is capable of transporting the mounting portion along a staircase;
A lifting lever coupled to the drive shaft of the drive pulley via a first ratchet mechanism so as to be rotatable;
A descent handle rotatably connected to the drive shaft via a worm mechanism and a second ratchet mechanism;
The first ratchet mechanism has switching means capable of switching between the forward and reverse rotation directions of the lifting lever that transmits the rotational force to the drive pulley,
The worm mechanism transmits the rotational force of the lowering handle to the second ratchet mechanism,
The second ratchet mechanism is a stair lifting device that transmits the rotational force of the lowering handle in a direction in which the driving pulley lowers the mounting portion. The riding section includes a seating section on which a user can sit,
2. The stair lift device according to claim 1, wherein the lifting lever and the first ratchet mechanism are provided on both sides of the seat portion, respectively. A plurality of triangular engagement blocks are provided along the longitudinal direction on the outer surface side of the transport body,
The engaging block has a plurality of convex portions that respectively engage with a plurality of groove portions formed at intervals in the longitudinal direction of the transport body, and a part of the plurality of convex portions is in the groove portion. The stair lift device according to claim 1 or 2, which is fixed to the stairs.   The stair lift device according to claim 3, further comprising a pressing plate that presses the inner surface side of the transport body toward the staircase.   The stair lift device according to any one of claims 1 to 4, further comprising an abutting member that protrudes downward from the mounting portion and a front end portion of which abuts against a floor surface below the floor.

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