JP2005239289A - Manual lifting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manual lifting device that does not require power supply and can be lifted up by easy manual operation. <P>SOLUTION: The manual lifting device 1 has a guide rail 2 along the inclination of stairs, a lifting platform 3 traveling along the guide rail 2, a lifting means 4 for makes the lifting platform 3 travel, and a driving means 5 for driving the lifting means 4 by manual operation on the lifting platform 3, and allows a user H to manually operate the driving means 5 on the lifting platform 3 to allow lifting. A weight 5b of a predetermined weight is movably disposed along the guide rail 2, the weight 5b and the lifting platform 3 are interconnected see-saw-operably by a cable strip via the top of the guide rail 2, total weight of the lifting platform 3 and the user H is canceled by the own weight of the weight 5b, and the lifting platform 3 can be lifted up by operating the driving means 5 by a small force. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a manual lifting device that does not require a power source and is mainly used for lifting a wheelchair, and more particularly to a technique that allows a user to manually lift and lower the vehicle while sitting on the wheelchair.

  Conventionally, Patent Documents 1 and 2 disclose a stair lift device that does not require a power source so that a user can move up and down a staircase manually while sitting on a wheelchair. These technologies move up by reciprocating all of the elevator body and transmitting power to the traveling gear via the ratchet and clutch when ascending, and releasing the clutch when descending and releasing the clutch at a constant speed. It is characterized by its own weight falling.

By the way, since these techniques transmit power while switching the ratchet by reciprocating motion of the oar, all the operation of the oar is not transmitted as an ascending driving force, and the ascending is not performed quickly and there is a problem with fatigue. In addition, when the user descends, the user of the wheelchair cannot operate the adjustment of the descending speed.
Japanese Patent Laid-Open No. 1-133885 Japanese Patent Laid-Open No. 1-133886

  The problem to be solved by the present invention is to solve these conventional problems, and to provide a manual lifting device that allows a user to easily adjust the speed of movement and stop when moving up and down. It is in.

The configuration of the present invention that solves this problem is as follows.
1) A guide rail is provided along the elevating direction, an elevating platform that travels along the guide rail is provided, an elevating unit that runs the elevating platform is provided, and a driving unit that drives the elevating unit manually is operated. In the manual lifting device that the user can manually operate the driving means on the lifting platform, the lifting assisting means for assisting the lifting force of the previous lifting platform is provided, and with the assistance of the lifting assisting means A manual lifting device 2 characterized in that the lifting means can be lifted by operating the driving means with a small force 2) The lifting assisting means is provided with a weight of a predetermined weight so as to be movable along the guide rail. Manual lifting as described in 1) above, wherein the lifting platform is connected to the lifting platform via the top of the guide rail so that the seesaw can be operated, and the total weight of the lifting platform and the user is offset by the weight of the weight. Device 3) Ascension The means is provided with a rotating shaft that is rotated by the driving means on the lifting platform, a gear is attached to the rotating shaft, a chain is stretched along the guide rail and engaged with the gear, and the rotating shaft is rotated by the driving means. The manual elevating device according to 1) or 2), wherein the elevating platform travels along the guide rail while the gear is engaged with the chain. 4) The driving force of the driving means is transmitted to the elevating means via the worm. The manual lifting device 5) according to any one of 1) to 3), wherein the driving means is a rotary handle. The manual lifting device 6) according to any one of 6) to 6), wherein the guide rail is inclined to the stairs. The manual elevating device according to any one of 1) to 5), wherein the manual elevating device is attached along the stairs and can be moved up and down.

  According to the present invention, the weight connected to the lifting platform is constantly moving downward by its own weight, and the weight of the lifting platform and the user is offset by the seesaw operation so that the total weight of the lifting platform and the user is pulled upward. The weight is raised while the lifting force is assisted by the weight of the weight. Therefore, the user can use the weight force to rotate the handle without positively acting on the handle, and can rise very easily.

  Moreover, since the driving force of the handle is transmitted through the worm, even if the operation of the handle is interrupted or reaches the top and stops, the gear does not rotate unless the worm rotates, so it acts as a brake when stopped. Thus, the lifting platform does not descend by weight, and a simple and safe structure that does not require a special brake mechanism.

  As an ascending assisting means of the present invention, there is a method of assisting the ascending by a tension force of a spring in addition to a method of canceling the weight by a seesaw operation (alternating up and down operation) by the weight of the weight. Since the method using a spring can be reduced in weight, it can be preferably installed on a staircase with a low load resistance such as a wooden house. As the lifting means, a quiet timing belt or the like may be used in addition to the chain. If there is a large level difference from the floor at the lowest point of the elevator platform, a slope will be provided to allow smooth entry. The slope may be a separate body, but may be attached so as to be accommodated in the lifting platform. Embodiments of the present invention will be specifically described below with reference to the drawings.

  1-7 is an example which installed the manual raising / lowering apparatus of this invention in the staircase of the house. 1 and 2 are explanatory views showing the use state of the manual lifting device of the first embodiment, FIG. 3 is an explanatory view of the driving means and the lifting means of the embodiment, and FIGS. FIG. 6, FIG. 6, 7 is explanatory drawing of the raising assistance means of an Example.

  As shown in FIG. 1, the manual lifting device 1 of the present embodiment is provided with a guide rail 2 along the slope of a staircase, a lifting platform 3 that travels along the guide rail 2, and a traveling platform 3. Elevating means 4 is provided, driving means 5 for driving the elevating means 4 by manual operation is provided on the elevating table 3, and ascending assisting means 6 for assisting the lifting force of the elevating table 3 with the weight of the weight 6 b is provided, and ascending The driving means 5 is operated with a small force with the assistance of the auxiliary means 6 so that the elevator 3 can be raised.

  As shown in FIGS. 4 and 5, the guide rail 2 has a U-shaped cross section having a wheel space 2c made of a light metal such as an aluminum alloy. 8 is installed along the both sides of the stairs with support legs 2b. The guide rail 2 on the right side forms a weight space 2d in which the weight 6b can slide along the same direction as the wheel space 2c in the upper part of the wheel space 2c.

  The lifting platform 3 has a plate shape that allows the wheelchair 7 to be ridden, and supports two horizontal rotating shafts 3a having gears 3b on the right side in the front and rear portions, respectively, at both ends of the rotating shaft 3a. A wheel 3c is pivotally mounted and disposed in the wheel space 2c of each guide rail 2. As shown in FIG. 3, each rotary shaft 3 a horizontally supports the lifting platform 3 on the oblique guide rail 2 using a vertical support stay 3 d and an oblique support stay 3 e. 3f is a fall prevention frame for the wheelchair 7, and 3g is a slope.

  As shown in FIG. 3, the elevating means 4 stretches the chain 4a along the longitudinal direction of the right guide rail 2, and engages the chain 4a with the front and rear gears 3b of the elevating table 3 so as to move upward from between the gears 3b. And engages with a gear 4b in the operation table 5a erected on the right front portion of the lifting platform 3.

  As shown in FIG. 3, the driving means 5 has a transmission shaft 5d having a bevel gear 5b at the upper end and a worm 5c at the lower end arranged vertically, and the worm 5c meshes with the gear 4b in the operation table 5a. A rotary handle 5f provided with a bevel gear 5e is attached to the operation table 5a to mesh the bevel gears 5b and 5e perpendicularly.

  As shown in FIGS. 6 and 7, the lift assisting means 6 horizontally supports a pulley 6 a on the weight space 2 d at the top of the right guide rail 2 and the outside thereof, and connects the weight 6 b and the lifting platform 3 to the guide rail 2. The weight 6b and the lifting / lowering base 3 are connected to each other so as to be able to perform a seesaw operation through the pulleys 6a with a rope 6c made of a slightly shorter rope.

  The weight 6b is set to 70 kg as a weight that can substantially cancel the total weight of the wheelchair 7 and the user H. One weight 6b may have a set weight, but for example, a thin weight 6b such as 5 kg or 10 kg may be used in combination for the set weight to facilitate adjustment of the weight.

  In this embodiment, as shown in FIG. 2, the user H seated on the wheelchair 7 gets in from the side of the elevator 3 via the slope 3g together with the wheelchair 7, and changes direction forward. When the user H sits on the wheelchair 7 and rotates the handle 5f of the operation console 5a in the forward direction, the driving force is turned by the bevel gears 5b and 5e and transmitted to the gear 4b through the worm 5c.

  The gear 4b is shifted by pulling the front of the chain 4a rotated and engaged with the transmitted driving force upward, and the gear 3b in front of the lifting platform 3 is rotated and engaged with the chain 4a by the tensile force. The elevator 3 is raised along the guide rail 2.

  On the other hand, the weight 6b connected by the lifting platform 3 and the cable 6c is always slid downward in the weight space 2d of the guide rail 2 by its own weight. The weight of the weight 6b is pulled upward so that the total weight of the lifting platform 3 and the user H is offset by the seesaw operation, and the weight 6b rises while assisting the lifting force.

  At this time, the user H can rotate the handle 5f without positively applying force to the handle 6f by borrowing the force of the weight 6b. In addition, since the driving force of the handle 5f is transmitted through the worm 5c, even if the operation of the handle 5f is interrupted or reaches the top and stops, the gear 4b does not rotate unless the worm 5c rotates. In some cases, the elevator 3 acts as a brake and does not descend by its own weight, and a simple and safe structure that does not require a special brake mechanism.

  At the time of lowering, the user H seated on the wheelchair 7 gets on the lifting platform 3 and changes direction to the handle 5f side, and descends by operating the handle 5f in the reverse direction. At this time, even if the weight of the weight 6b acts or the handle 5f is vigorously rotated, the lifting platform 3 is gently lowered to be safe. Of course, even if the operation is interrupted or reached downward and stopped, the lifting platform 3 does not move due to the braking action of the worm 5c.

  The manual elevating device of the present invention is mainly used for raising and lowering a staircase in a house that is less frequently used, but it can also be used as a simple elevator or the like by installing a guide rail vertically. Moreover, not only wheelchair users but also elderly people such as the elderly can ride directly on the platform.

It is explanatory drawing which shows the use condition of the manual raising / lowering apparatus of an Example. It is explanatory drawing which shows the use condition of the manual raising / lowering apparatus of an Example. It is explanatory drawing of the drive means and raising / lowering means of an Example. It is explanatory drawing which shows the support of the lifting platform of an Example. It is explanatory drawing which shows the support of the lifting platform of an Example. It is explanatory drawing of the raising assistance means of an Example. It is explanatory drawing of the raising assistance means of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Manual elevating device 2 Guide rail 2a Guide groove 2b Support leg 2c Wheel space 2d Weight space 3 Elevator 3a Rotating shaft 3b Gear 3c Wheel 3d, 3e Support stay 3f Drop prevention frame 3g Slope 4 Elevating means 4a Chain 4b Gear 5 Driving means 5a Operation table 5b Bevel gear 5c Worm 5d Transmission shaft 5e Bevel gear 5f Handle 6 Lifting auxiliary means 6a Pulley 6b Weight 6c Cord 7 Wheelchair 8 Footboard H User

Claims (6)

  A guide rail is provided along the elevating direction, an elevating platform that travels along the guide rail is provided, an elevating device that runs the elevating platform is provided, and a driving device that drives the elevating device manually is provided in the elevating platform. In the manual lifting device that allows the user to manually lift and lower the driving means on the lifting platform, a lifting assisting means for assisting the lifting force of the previous lifting platform is provided, and the driving means is assisted by the lifting assisting means A manual lifting device characterized in that the lifting platform can be lifted by operating with a small force.   Ascending assist means provides a weight with a predetermined weight so that it can move along the guide rail, and connects the same weight and the lifting platform so that it can operate as a seesaw via the top of the guide rail with a rope. 2. The manual lifting device according to claim 1, wherein the total weight of the platform and the user is offset.   The lifting / lowering means is provided with a rotating shaft that is rotated by the driving means on the lifting platform, a gear is attached to the rotating shaft, a chain is stretched along the guide rail and engaged with the gear, and the driving means rotates the rotating shaft. The manual lifting device according to claim 1 or 2, wherein the lift is made to travel along the guide rail while the gear engages with the chain.   4. A manual lifting device according to claim 1, wherein the driving force of the driving means is transmitted to the lifting means via a worm.   The manual lifting device according to any one of claims 1 to 4, wherein the driving means is a rotary handle.   The manual elevating device according to any one of claims 1 to 5, wherein a guide rail is attached along the slope of the stairs so that the stairs can be raised and lowered.

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