JP2003160287A - Stair elevating device for wheelchair or the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify a mechanism while facilitating going up and down the stairs for a wheelchair or the like (the wheelchair, a baby carriage, a walking aid, a load carrier, or the like). <P>SOLUTION: A drive pin and a guide roller are projected sideways from a horizontal support base of the wheelchair or the like, and a first guide groove for the drive pin, and a second guide groove for the guide roller are formed at a vertical wall of a guide support device. The drive pin is driven on the lower side of a drive chain, and the drive pin is vertically reciprocated to allow the position of the drive pin to approach the ground plane. In a second invention, horizontal extension parts are formed at the first guide groove, second guide groove and drive chain of the guide support device, and an electric motor is positioned below an elevating passage of the horizontal support base of the wheelchair or the like. In a third invention, a safety device is provided for impeding reverse rotation and overspeed fall to the abnormality of a drive mechanism such as cutting of the drive chain of an elevating driving device. In a fourth invention, the drive pin is separated from the guide groove to remove the horizontal support base of the wheelchair or the like from the stairs so as to be usable as the ordinary stairs. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stair climbing device such as a wheelchair for stairs having a relatively low height such as a stone step of a temple. More specifically, it is economically inappropriate to install an escalator.For stairs with a relatively small number of steps, it is only necessary to place a device for assisting the stair climbing motion of wheelchairs, the elderly, and people with walking disabilities on the stairs. The present invention relates to a stair climbing device such as a wheelchair for stairs that can be provided easily and at low cost.

[0002]

[Prior Art] Equipped on one side of stairs at stations, hotels, etc.
BACKGROUND ART A cantilever type wheelchair lifting device equipped with a guide support mechanism and a drive mechanism to lift and lower a horizontal support base such as a wheelchair supported in a cantilever state by the guide support mechanism. For example, Japanese Patent Laid-Open No. 8-113444 discloses a stair climbing device. Further, Japanese Patent Laid-Open Publication No. 7-187547 discloses a stair lift, which is provided on both sides of a horizontal support stand such as a wheelchair and equipped with guide support devices placed on an existing stair, and uses an existing stair. It can be easily equipped. The lifting drive means is a horizontal support (step) such as a wheelchair.
Both ends of the chain are fixed to both side plates integrated with the chain, and the chain is driven by a motor via a drive sprocket.

[0003]

In the above-mentioned known technique, the former uses a horizontal support base (step) such as a wheelchair as a cantilever support structure. Therefore, in order to secure necessary strength, a guide support mechanism and a drive mechanism are used. Must be permanently installed on one side of the stairs. In the latter case, it is impossible to remove the elevating and lowering drive means, the guide support mechanism, and the horizontal support stand (step) such as a wheelchair when not in use as a general staircase. That is,
There is no technical idea of using the stairs for wheelchairs and the stairs for general use together. Therefore, according to the present invention, a horizontal support stand (step) such as a wheelchair can be separated from the elevating and lowering drive means, and a guide support mechanism is provided on both sides of the horizontal support stand (step) to simplify the weight. It is an issue.

Further, according to the first invention of the present application, a wheelchair or the like (wheelchair, baby carriage, walking assistance vehicle,
The challenge is to make it easier to get in and out of luggage carriers.
It is an object of the second invention of the present application to reduce the floor area for installing a stair climbing device for wheelchairs and the like, and ease the installation conditions for stairs for wheelchairs and the like. The third invention of the present application relates to an abnormality (for example, disconnection of a driving chain) of a stair climbing device such as a wheelchair.
The task is to improve the safety of the device. A fourth invention of the present application makes it possible to easily remove a horizontal support (step) such as a wheelchair from a staircase when not in use, and has an object to use a general staircase and a staircase such as a wheelchair.

[0005]

SUMMARY OF THE INVENTION A first invention of the present application is to provide a pair of left and right guide support devices that can be freely placed on an existing staircase, and a horizontal support base for wheelchairs or the like arranged between the pair of left and right guide support devices. And a stair climbing device for wheelchairs and the like including a lifting drive device for the horizontal support base for wheelchairs and the like, while driving pins are projected laterally from the lower part of the horizontal support base for wheelchairs and the guide rollers are directed laterally from the upper part. And the guide support device has a vertical wall having a first guide groove for guiding the movement of the drive pin and a second guide groove for guiding the movement of the guide roller, and a horizontal support stand for a wheelchair or the like. Guided to ascend and descend in a horizontal state, the elevator drive device includes a drive sprocket mounted on the outside of the vertical wall of the guide support device, a driven sprocket, a drive chain wound between both sprockets, and a drive chain. Includes a drive source for, provides a wheelchair or the like stair-climbing device, characterized in that the concatenation of the drive pin to the drive chain at the lower side of the drive chain.

According to the second aspect of the present invention, the drive pin is caused to project laterally from the lower portion of the horizontal support base such as a wheelchair, and the guide roller is projected laterally from the upper portion. Has a vertical wall having a first guide groove for guiding the guide roller and a second guide groove for guiding the movement of the guide roller, and guides the horizontal support base such as a wheelchair to move up and down in a horizontal state. A drive sprocket mounted on the outside of the vertical wall of the guide support device, a driven sprocket,
A drive chain wound between both sprockets and a drive source for the drive chain are formed, and horizontal extension portions are formed in the first guide groove and the second guide groove of the guide support device, and an upper part of a hoistway of a horizontal support base such as a wheelchair is formed. Form a space between the stairs and
Provided is a stair climbing device for wheelchairs or the like, in which an electric motor is located below a hoistway of a horizontal support base for wheelchairs or the like in a plan view.

According to a third aspect of the present invention, the drive pin projects laterally from the lower portion of the horizontal support base such as a wheelchair and the guide roller projects laterally from the upper portion, and the guide support device moves the drive pin. Has a vertical wall having a first guide groove for guiding the guide roller and a second guide groove for guiding the movement of the guide roller, and guides the horizontal support base such as a wheelchair to move up and down in a horizontal state. A drive sprocket mounted on the outside of the vertical wall of the guide support device, a driven sprocket,
Including a drive chain wound between both sprockets and a drive source for the drive chain, a drive interlocking shaft is provided in association with the left and right drive sprockets, and a reverse rotation prevention / overspeed drop prevention device is acted on the drive interlocking shaft. A stair climbing device for wheelchairs, etc. is provided.

According to a fourth aspect of the present invention, the drive pin is caused to project laterally from the lower portion of the horizontal support base such as a wheelchair, and the guide roller is projected laterally from the upper portion, and the guide support device moves the drive pin. Has a vertical wall having a first guide groove for guiding the guide roller and a second guide groove for guiding the movement of the guide roller, and guides the horizontal support base such as a wheelchair to move up and down in a horizontal state. A drive sprocket mounted on the outside of the vertical wall of the guide support device, a driven sprocket,
Including a drive chain wound between both sprockets, and a drive source (electric motor) for the drive chain, a drive pin of a horizontal support such as a wheelchair and a drive chain of a lifting drive device can be connected via a connection pin, In the connected state of the connecting pin, the horizontal movement of the drive chain raises and lowers the drive pin to raise and lower the horizontal support of the wheelchair and the like in a horizontal state to assist the stair climbing of the wheelchair and the like. The horizontal support base can be separated from the pair of left and right guide support devices, and the opening communication groove is continuous with a part of the guide grooves of the left and right guide support devices so that the guide rollers can be separated from the guide grooves. It is characterized in that the support base is removed from the stairs so that it can be used as a general-purpose stair.

[0009]

Embodiments will be described in detail below with reference to the embodiments shown in the drawings. The first invention will be described with reference to FIGS. 1 to 4. A guide support device C that can be placed on the existing stairs B,
A stair climbing device such as a wheelchair is composed of a horizontal support base 1 for wheelchairs and the like, which is arranged between a pair of left and right vertical walls 7 of the guide support device C, and a lifting drive device D for the horizontal support base 1 for wheelchairs. To do.

The guide support device C includes a pair of left and right vertical walls 7,
The support base 12 is fixed to the bottom surface of 7, and the left and right support bases 12 are fixed to both ends of the connecting column 13, and the pair of left and right vertical walls 7 and 7 are integrally configured to be freely installed on a desired staircase. To do. A first guide groove 5 and a second guide groove 6 are formed in the pair of left and right vertical walls 7, 7 to guide the movement of the drive pin 3 and the guide roller 4, respectively.

The wheelchair horizontal support base 1 is composed of a flat rectangular plate having an area sufficient to mount a wheelchair, a baby carriage, a walking assistance vehicle, a baggage vehicle A and the like with an operator E, and a wheelchair etc. with a frame 1c. It surrounds A and the operator E and is continuous with the boarding / alighting guide pieces 1a and 1b. Further, the protrusions 1d and 1e are projected from the lower surface of the horizontal support base such as a wheelchair, the drive pin 3 is mounted on the protrusion 1d, and the guide roller 4 is mounted on the protrusion 1e. 4 is projected to the side of the horizontal support 1 such as a wheelchair.

Referring to FIGS. 3 and 4, the elevating / lowering device D has a drive sprocket 8 and a driven sprocket 9 mounted on the outside of the vertical wall 7 of the guide support device C, and the drive sprocket 8 and the driven sprocket 9 are attached. The drive chain 10 and the drive chain (electric motor) M for the drive chain 10 and the like. The drive source is an electric motor in the embodiment, but it may be a hydraulic motor, a gasoline engine, or the like. The drive sprocket 25 and the electric motor M include a sprolet 16,
It is transmitted via a chain 17, a sprocket 18 and a transmission system 15.

Further, according to the first invention of the present application, the drive chain 1 is provided.
The drive pin 3 is connected to the drive chain at the lower side 10a of the drive chain 0, and the drive pin 3 is connected to the lower side 10 of the drive chain 10.
At a, reciprocation is possible between the drive sprocket 8 and the driven sprocket 9.

Thus, the horizontal support 1 of the wheelchair or the like rises from the lower position shown by the solid line in FIG. 1 to the upper position shown by the virtual line in FIG. 1 by the forward rotation of the electric motor M. On the contrary, when the electric motor M is rotated in the reverse direction, the horizontal support base 1 such as a wheelchair descends from the upper position shown by the virtual line in FIG. 1 to the lower position shown by the solid line in FIG. 1 while maintaining the horizontal state.

The boarding / alighting guide pieces 1a, 1b can be bent upwards or downwards when boarding / alighting the wheelchair or the like A.
To get in and out of the horizontal support stand 1 such as a wheelchair.

The drive pin 3 is located below the horizontal support base 1 for the wheelchair and on the lower side 10a of the drive chain 10 so that the horizontal support base 1 for the wheelchair is close to the ground (ground). The space between the wheelchair and the horizontal support stand 1 is small)
As a result, the boarding / alighting guide piece 1a has a small inclination angle (5 degrees or less), which facilitates boarding / alighting. For example, in the case of a wheelchair, no assistance other than the nurse E is required.

Next, the second invention will be described with reference to FIGS. The second invention is different from the first invention in FIG.
5, the horizontal extension portions 5A and 5B are formed in the first guide groove 5 and the second guide groove 6 of the guide support device, and the horizontal extension portion 10AA is formed in the drive chain 10.
The horizontal extension portions 5A and 5B and the horizontal extension portion 10AA of the drive chain 10 add a horizontal extension portion to the upper part of the movement trajectory of the horizontal support base 1 such as a wheelchair. As a result, a space H is formed between the stairs and the upper part of the ascending / descending path of the horizontal support such as a wheelchair.

The electric motor M and the transmission system to the drive sprocket 8 are arranged in the space H so that the electric motor M is located below the hoistway of the horizontal support 1 such as a wheelchair in a plan view. Therefore, the lifting drive device D, except for the drive sprocket 8, the driven sprocket 9 and the drive pin 3,
It will be arranged between the vertical walls 7, 7 of the guide support device C.

A third invention of the present application is characterized in that a drive interlocking shaft interlocking with the left and right drive sprockets is provided, and a reverse rotation prevention / overspeed drop prevention device is acted on the drive interlocking shaft. In the embodiment shown in FIG. 11, the first sprocket 8 is directly connected to the left and right drive sprockets 8 and traverses both vertical walls 10 and 10.
The sprocket shaft 25 is provided, and the first sprocket shaft 25
Is the drive interlocking shaft. First sprocket shaft 25
Equipped with a reverse rotation prevention / overspeed descent prevention device for (driving interlocking shaft), measures against abnormalities of the lifting drive device D such as disconnection of the drive chain, that is, descent while the horizontal support base 1 of the wheelchair or the like is descending or descending It is a safety device against rapid descent.

In the hoisting machine, the ratchet structure for preventing the descent during the hoisting of the load, the structure in which a spring disc is interposed between the hoisting shaft and the ratchet wheel, and the ratchet operation is performed with a load exceeding the limit. Although it is possible to pause in the middle position, when descending, it allows the reverse rotation of the hoisting axis to allow low speed descent, but is equipped with a safety mechanism to prevent rapid descent. By applying this safety mechanism to the first sprocket shaft 25, it is possible to provide a safety device for the reverse rotation prevention / overspeed drop prevention device against an abnormality of the lifting drive device.

In the embodiment of FIG. 11, in addition to the first sprocket shaft 25, the second sprocket shaft 2 which is directly connected to the left and right driven sprockets 9 and 9 and traverses both vertical walls 7 and 7.
6, the third chain 23 and the fourth chain 24 are wound between the first sprocket shaft 25 and the second sprocket shaft 26, and the reverse rotation prevention ratchet device 22 is mounted on the fourth chain 24 on the third chain 23. The overspeed drop prevention device 21 is operated to provide a safety device for the reverse rotation prevention / overspeed drop prevention device. By operating the switching button, the reverse rotation prevention ratchet device 22 is actuated when rising and the overspeed fall prevention device 21 is acted when descending, and the reverse rotation prevention ratchet device 2 is operated.
The operation of No. 2 is stopped so that the drive chain can be moved backward (the drive pin can be lowered).

The reverse rotation inhibiting ratchet device 22 may be replaced with a mechanical locking means such as a ratchet pawl, and the chain may be locked by reverse rotation detection by a rotation sensor. For example, the interlocking drive shaft may be forcibly stopped by the operation of the electromagnetic clutch. The overspeed drop prevention device 21 can also be an electric means instead of the above-mentioned mechanical means. An abnormality may be detected by an electric detection unit such as a speed sensor, an acceleration sensor, or a rotation speed sensor, and the interlocking drive shaft may be forcibly stopped by an electric unit or a mechanical unit.

In the fourth invention of the present application, the drive pin 3 of the horizontal support base 1 for wheelchairs and the pin a of the drive chain 10 of the lifting drive device D are made connectable via the connection pipe 20, and the connection pipe 20 is connected.
In the connected state, the horizontal support base 1 for the wheelchair or the like is raised and lowered in a horizontal state by raising and lowering the drive pin 3 by the rotation of the drive chain 10 to assist the wheelchair or the like A in stair climbing. Then, the horizontal support base 1 such as a wheelchair can be separated from the vertical walls 7 of the guide support device C. Further, the opening communication groove 6a (FIG. 2) is made continuous with a part of the second guide groove 6 of the guide walls 7, 7 of the guide support device C, and the guide roller 4 is moved to the second position.
It can be separated from the guide groove 6.

Thus, by separating the drive pin 3 from the first guide groove 5 and the guide roller 4 from the second guide groove 6, the wheelchair horizontal support stand 1 can be removed from the stairs. By removing the horizontal support 1 such as a wheelchair from the stairs, it can be used as a general staircase.

[0025]

According to the first invention of the present application, a pair of left and right guide support devices that can be freely placed on an existing staircase, a horizontal support base such as a wheelchair disposed between the pair of left and right guide support devices, and the wheelchair. In a stair climbing device such as a wheelchair including a lifting drive device for a horizontal support base, since the driving pin is connected to the driving chain below the driving chain of the lifting drive device,
The position of the drive pin can be brought close to the floor surface, and it has an effect of facilitating getting in and out of a wheelchair, a baby carriage, a walking assistance vehicle, etc. on a horizontal support stand such as a wheelchair at the bottom and top steps of the stairs.

According to the second invention of the present application, since the horizontal extension portions are formed in the first guide groove and the second guide groove of the guide support device for the drive pin and the guide roller, the wheelchair or the like is provided at the upper part of the ascending / descending path of the wheelchair. A space can be formed between the trajectory of the equal horizontal support base and the stairs, and the electric motor is located below the hoistway of the horizontal support base such as the wheelchair in a plan view. By installing the electric motor within the width of the hoistway, it is possible to reduce the floor area for installing the stair climbing device such as a wheelchair without adding the floor area for installing the electric motor.

According to a third aspect of the present invention, a first sprocket shaft that is directly connected to the left and right drive sprockets and crosses both vertical walls is provided, and a second sprocket shaft that is directly connected to the left and right driven sprockets and crosses both vertical walls is provided. The third chain and the fourth chain are wound between the first sprocket shaft and the second sprocket shaft, and the reverse chain stop device is acted on the third chain and the overspeed drop prevention device is operated on the fourth chain. In response to the disconnection, the reverse rotation prevention device operates to prevent the descent when rising, and when the descent decreases, the overspeed drop prevention device operates to prevent the descent at an abnormal speed, thereby enhancing safety measures.

In the fourth invention of the present application, the drive pin of the horizontal support base such as a wheelchair and the drive chain of the elevating drive device can be connected via the connection pin, and when the connection pin is connected, the drive chain is driven by rotation. The vertical support of the wheelchair, etc. is raised and lowered in a horizontal state by lifting the pin to assist the stairs lifting of the wheelchair, etc. When the connecting pin is not connected, the horizontal support of the wheelchair can be separated from the pair of left and right guide support devices. In addition, by connecting the opening communication groove to a part of the guide groove of the pair of left and right guide support devices so that the guide roller can be separated from the guide groove, the horizontal support base such as a wheelchair is removed from the stairs for general use. It has the effect that it can be used as a staircase.

[Brief description of drawings]

FIG. 1 is a side view showing the outline of a stair climbing device for wheelchairs etc. showing an embodiment of the first invention of the present application.

FIG. 2 is a side view of the guide support device.

FIG. 3 is a front view of the guide support device and the lifting drive unit.

FIG. 4 is a front view showing the outline of the lifting drive unit.

FIG. 5 is a side view similar to FIG. 1, showing an outline of a stair climbing device for wheelchairs etc. showing an embodiment of the second invention of the present application.

FIG. 6 is a side view of the guide support device similar to FIG.

FIG. 7 is a front view of the guide support device and the lifting drive unit.

FIG. 8 is a front view showing the outline of the lifting drive unit.

FIG. 9 is a partial front view of a guide support device showing a connection structure between a drive pin and a drive chain in a stair climbing device for wheelchairs etc. showing an embodiment of the fourth invention of the present application.

FIG. 10 is a partial front view of a guide support device including a guide roller and a second guide groove.

FIG. 11 is a front view showing the outline of a lifting drive device including a safety device according to an embodiment of the present invention.

[Explanation of symbols]

A wheelchair B stairs C guide support device D Lift drive device H space M electric motor 1 Horizontal support for wheelchairs, etc. 3 drive pins 4 guide rollers 5 First guide groove 5A horizontal extension 6 Second guide groove 6A horizontal extension 7 vertical wall 8 drive sprocket 8 9 Driven sprost 10 Drive chain 10a lower side of drive chain 10a 10AA horizontal extension 21 Overspeed fall prevention device 22 Reverse rotation prevention ratchet device 25 1st sprocket shaft

Claims (4)

[Claims] 1. A pair of left and right guide support devices that can be freely placed on an existing staircase, a horizontal support base such as a wheelchair disposed between the pair of left and right guide support devices, and a lift for the horizontal support base such as the wheelchair. In a stair climbing device such as a wheelchair including a drive device, the drive pin is projected laterally from the lower part of the horizontal support base of the wheelchair and the guide roller is projected laterally from the upper part, and the guide support device is It has a vertical wall having a first guide groove for guiding the movement of the drive pin and a second guide groove for guiding the movement of the guide roller, and guides a horizontal support stand such as a wheelchair to move up and down in a horizontal state. The drive device includes a drive sprocket mounted on the outside of the vertical wall of the guide support device, a driven sprocket, a drive chain wound between both sprockets, and a drive source for the drive chain. A stair climbing device for wheelchairs or the like, characterized in that a drive pin is connected to the drive chain below the dynamic chain. 2. A pair of left and right guide support devices that can be freely placed on an existing staircase, a horizontal support base such as a wheelchair disposed between the pair of left and right guide support devices, and a lift for the horizontal support base such as the wheelchair. In a stair climbing device such as a wheelchair including a drive device, the drive pin is projected laterally from the lower part of the horizontal support base of the wheelchair and the guide roller is projected laterally from the upper part, and the guide support device is It has a vertical wall having a first guide groove for guiding the movement of the drive pin and a second guide groove for guiding the movement of the guide roller, and guides a horizontal support stand such as a wheelchair to move up and down in a horizontal state. The drive device includes a drive sprocket mounted outside the vertical wall of the guide support device, a driven sprocket, a drive chain wound between both sprockets, and a drive source for the drive chain. A horizontal extension portion is formed in the first guide groove and the second guide groove of the holding device, and a space is formed between the stairs at the upper part of the hoistway of the horizontal support base of the wheelchair or the like, and the electric motor is horizontally arranged in the wheelchair or the like in plan view. A stair climbing device for wheelchairs or the like, which is located below a hoistway of a support base. 3. A pair of left and right guide support devices that can be freely placed on an existing staircase, a horizontal support base such as a wheelchair disposed between the pair of left and right guide support devices, and a lift for the horizontal support base such as a wheelchair. In a stair climbing device such as a wheelchair including a drive device, the drive pin is projected laterally from the lower part of the horizontal support base of the wheelchair and the guide roller is projected laterally from the upper part, and the guide support device is It has a vertical wall having a first guide groove for guiding the movement of the drive pin and a second guide groove for guiding the movement of the guide roller, and guides a horizontal support stand such as a wheelchair to move up and down in a horizontal state. The drive device includes a drive sprocket mounted on the outside of the vertical wall of the guide support device, a driven sprocket, a drive chain wound between both sprockets, and a drive source for the drive chain. In conjunction with the drive sprocket provided drive linkage shaft, wheelchairs and the like stair-climbing device, characterized in that by applying a reverse rotation prevention & overspeed descent blocking device for the drive linkage shaft. 4. A pair of left and right guide support devices that can be freely placed on an existing staircase, a horizontal support base such as a wheelchair disposed between the pair of left and right guide support devices, and a lift for the horizontal support base such as the wheelchair. In a stair climbing device such as a wheelchair including a drive device, the drive pin is laterally projected from a lower portion of the horizontal support base of the wheelchair and a guide roller is laterally projected from an upper portion, and the guide supporting device is It has a vertical wall having a first guide groove for guiding the movement of the drive pin and a second guide groove for guiding the movement of the guide roller, and guides a horizontal support stand such as a wheelchair to move up and down in a horizontal state. The drive device includes a drive sprocket mounted outside the vertical wall of the guide support device, a driven sprocket, a drive chain wound between both sprockets, and a drive source for the drive chain. The drive pin of the equal horizontal support base and the drive chain of the lifting drive can be connected via the connecting pin.When the connecting pin is connected, the horizontal support base of the wheelchair etc. can be moved by raising and lowering the drive pin by the rotation of the drive chain. Raise and lower in a horizontal state,
Assists stair climbing of wheelchairs, etc., and when the connecting pins are not connected, the horizontal support for wheelchairs etc. can be separated from the pair of left and right guide support devices, and the guide grooves of the left and right guide support devices are partially opened. A stair climbing device for wheelchairs or the like, characterized in that the communication groove is continuous, the guide roller can be separated from the guide groove, and the horizontal support for the wheelchair or the like is removed from the stairs so that it can be used as a general-purpose staircase.