KR100960101B1 - Stairway up-down apparatus for wheel-chair - Google Patents

Abstract

The present invention relates to a wheelchair lift device, in particular a wheelchair lift device for lifting a person in a wheelchair along a stair railing, a pair of guide frames disposed parallel to both sides along the stairs and Both sides are supported by the guide frame, the boarding die moving up and down along the guide frame, a pair of driving wheels rotatably coupled to both sides of the boarding die, and the rotational force of the driving wheels to transmit the boarding. And a power transmission means for allowing a die to move up and down along the guide frame, and a lowering prevention means coupled to the power transmission means to prevent the boarding die from descending. Because the wheelchair can be elevated, power consumption and installation costs are reduced. Easy to manage the failure or malfunction due to reduced operating a kinematic by La manually and therefore can be easily installed on existing indoor and outdoor stairs without nine minutes can be widely used.

Wheelchair, lifting, frame, boarding die, wheel, roller, chain, spur gear, shaft, stopper, ratchet, swing lever

Description

Stairway lifting equipment for wheelchairs {Stairway up-down apparatus for wheel-chair}

The present invention relates to a wheelchair stair lifting device, and more particularly to a wheelchair stair lifting device that can be manually lifted by the occupant as a device for elevating the wheelchair when the person in the wheelchair is going up and down the stairs.

In general, a wheelchair lift is installed in a subway or a building so that people with disabilities, especially those with disabilities, can easily climb up and down stairs.

As is known, the wheelchair lift is provided with a boarding foot and a handle that can support and support a wheel body, and the boarding foot and the handle are movably attached to a handrail inclined along the stairs.

The means for allowing the boarding step and the handle to move up and down along the railing is driven using a motor, which is normally moved automatically by a passenger by operating a switch.

By the way, the automatic wheelchair lifting device of the above structure is automatically driven and convenient, but because the power consumption is large and the installation places are very large, the installation cost is very high, which is not widely used for budget reasons.

In addition, because it is not used frequently, if left unattended for a long time does not work or cause a malfunction often requires repair.

The present invention has been made to solve the above problems, it is an object of the present invention to provide a wheelchair lift device for the passenger can easily lift the wheelchair along the stairs manually.

In order to achieve the above object, the present invention is a wheelchair stairway lifting device for elevating a person in a wheelchair along a staircase railing, a pair of guide frames disposed parallel to both sides along the stairs, and the guide Both sides are supported by the frame and the boarding die moves up and down along the guide frame, a pair of driving wheels rotatably coupled to both sides of the boarding die, and the boarding die is transferred by transmitting the rotational force of the driving wheels. It is characterized by consisting of a power transmission means for moving up and down along the guide frame, and a lowering prevention means coupled to the power transmission means to prevent the boarding die from descending.

Preferably, the guide frame is composed of a long support frame, a rail arranged along the support frame and a roller chain provided on the side of each rail, the wheel chain is wound around the drive wheel is fixed do.

Preferably, the power transmission means is a wheel sprocket interlocked with the lower drive wheel, a juice gear gear linked to the wheel sprocket, a housing for fixing the wheel sprocket and the juice gear to the boarding die; A shaft which connects the longitudinal spur gear interlocked with the juice spur gear, the roller sprocket interlocked with the vertical spur gear and rotates along the roller chain, and the longitudinal spur gear and the roller sprocket provided on both sides of the boarding die; The rolling roller is coupled to the shaft end and rolls along the rail, and is formed between the longitudinal spur gear and the roller sprocket and includes a one-way clutch bearing for transmitting rotational force in only one direction.

Preferably, the lowering prevention means is a push roller in contact with the wheel chain, an axial swing lever coupled to the bottom of the push roller, a block for fixing the swing lever to the riding die, and one end of the swing A stopper rotatably coupled to the lever end and rotatable about the swing lever, a sawtooth ratchet which makes the other end of the stopper step by step on one side of the rail, and the block and the stopper to connect the stopper to the ratchet. It is composed of a tension spring to be caught, characterized in that the pressing roller is pressed by the pressing of the moving wheel chain is characterized in that the end of the stopper is separated from the ratchet.

Preferably, an auxiliary wheel is further provided inside the driving wheel to rotate the driving wheel by a passenger.

Preferably, the boarding die is composed of a base for supporting a wheelchair, a handle placed on both sides of the base, a footrest coupled to the front of the base, and a door coupled to the handle so as to be opened and closed. It is done.

The effect of the present invention by the above-described configuration can reduce the power consumption or installation cost because the passenger can easily lift the wheel chair with a small force.

In addition, since it is mechanically operated by manual operation, it is easy to manage by reducing failures and malfunctions and can be widely installed since it can be easily installed on existing stairs without distinguishing between indoors and outdoors.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of the present invention will be described in detail.

1 is a side view showing a lift device for a wheelchair according to an embodiment of the present invention, Figure 2 is a cross-sectional view AA 'of Figure 1 showing the guide frame of the present invention, Figure 3 is a view showing the power transmission means of the present invention BB 'sectional drawing of 1, FIG. 4 is CC' sectional drawing of FIG. 1 which shows the fall prevention means of this invention.

The present invention largely comprises a guide frame 100, the riding die 200, the driving wheel 300, the power transmission means 400, the lowering prevention means (500).

Referring to the overall layout of the present invention with reference to the bar shown in Figure 1, a pair of elongated guide frame 100 is fixed along both sides of the stairs, it is possible to ride a wheelchair and both ends by the guide frame 100 While being supported, the boarding die 200 which is inclined to rise and fall along the guide frame 100 is disposed, and a pair of driving wheels 300 having a large diameter are rotatably coupled to both sides of the boarding die 200. A power transmission means 400 is disposed between each of the driving wheels 300 and each of the guide frames 100 to transmit the rotational force generated by manually rotating the driving wheel 300. Allows to ride on and off the guide frame 100.

In addition, the lowering prevention means 500 for preventing the boarding die 200 from lowering itself is coupled to the power transmission means 400.

First, the guide frame 100 will be described with reference to FIGS. 1 and 2.

The guide frame 100 is composed of a support frame 110, a rail 120, a roller chain 130.

The support frame 110 is fixed to be obliquely secured along the stairs as a long rectangular flat plate, the material is preferably made of steel to withstand a large load.

It is also preferable that the two flat plates are arranged in two parallel stages as shown, and coupled to each other by a plurality of fixing members 112.

That is, the rail 120 is formed along the longitudinal direction of the support frame 110 at the same slope as the inclination angle of the stairs. The rail 120 may have any shape, but as shown in FIG. 2, the rail 120 generally has a 'c' shape, and is formed in two stages in parallel.

And the lower side of each rail 120 is provided with a chain-shaped roller chain 130 of the power transmission means 400 in a straight line. The roller chain 130 is sufficient to be of the same shape as the chain used for rotating, and the size is of course selectable as needed.

At this time, as shown in order to fix the roller chain 130 is fixed by attaching the 'b' shaped angle.

In addition, as described above, the guide frame 100 is fixed and installed in parallel with two rails 120 at both sides of the stairs, as described above, and the rail 120 and the roller chain 130 face each other. It is arranged to face the inside of the (100).

Next, the boarding die 200 will be described with reference to FIG. 1.

The boarding die 200 includes a base 210, a handle 220, a footrest 230, and a door. The base 210 forms a flat plate and is disposed on a floor to mount a wheelchair. do.

The handle 220 is placed vertically on the base 210, the handle 220 is a rod shape is appropriate, and more preferably a plurality of rectangular parallelepiped is provided.

In addition, one side of the base 210, that is, the front of the base 210 is provided with a footrest 230 so that the wheelchair can rise, the footrest 230 has a trapezoidal shape as shown in FIG. The upper surface is inclined and the lower surface is flat so as to be in close contact with the ground.

A person in a wheelchair operates a wheelchair to board the base 210 through the footrest 230 by itself.

The door is placed between the base 210 and the footrest 230 and operates to open and close.

Next, the driving wheel 300 will be described with reference to FIG. 1.

The driving wheel 300 is formed in a circular shape rotatably coupled to one side of the handle 220, a pair is disposed on both left and right ends of the base 210, each of the base 210 and the guide frame 100 Located in between.

In this case, the diameter of the driving wheel 300 may have various sizes, but about 1 m is appropriate.

In addition, a chain-shaped wheel chain 310 is wound around an outer circumference of the driving wheel 300 as shown in an enlarged portion of FIG. 1. The wheel chain 310 is interlocked with the power transmission means 400 to be described later.

Meanwhile, one side of the driving wheel 300, that is, the boarding die 200, may further include an auxiliary wheel 320 having the same central axis as the driving wheel 300 and having a diameter smaller than that of the driving wheel 300. There is, this function to give a rotational force to the driving wheel 300 by the wheelchair occupant by hand. Of course, it is preferable to manufacture the auxiliary wheel 320 by cloth or synthetic resin because it must be held by hand.

Next, the power transmission means 400 will be described with reference to FIGS. 1 and 3, and for reference, the power transmission means 400 may include a rail of each guide frame 100 as shown in FIG. 1. 120 and the roller chain 130 are provided with two horizontally so that a total of four are disposed at the four corners of the base 210, each of which is the same structure, so only one will be described.

The power transmission means 400 is wheel sprocket 410, juice spur gear 420, housing 430, longitudinal spur gear 440, roller sprocket 450, shaft 460, rolling roller 470 Is done.

First, a wheel sprocket 410 is positioned between the lower portion of the driving wheel 300 and the base 210, and interlocks with the wheel chain 310.

The wheel sprocket 410 is configured to transmit power by forming a sprocket shape and rotates in association with the wheel chain 310 when the driving wheel 300 rotates.

In addition, a spur gear-shaped juice spur gear 420 is coupled to one side of the wheel sprocket 410 in combination with the wheel sprocket 410 and rotates coaxially.

The juice spur gear 420 and the wheel sprocket 410 are fixed to the base 210 by the housing 430, and the longitudinal spur gear 440 is interlocked under the juice spur gear 420.

However, the longitudinal spur gear 440 is coupled to one end of the shaft 460, and the shaft 460 is disposed between the rails 120 facing the lower portion of the base 210 and the shaft ( The longitudinal spur gears 440 are coupled to both sides of the 460, respectively. That is, two shafts 460 are installed.

In addition, a sprocket-shaped roller sprocket 450 is coupled on one side of the shaft 460 of the longitudinal spur gear 440, and the roller sprocket 450 is interlocked with the roller chain 130.

In more detail, the rotational force generated by the rotation of the driving wheel 300 is transmitted by the wheel sprocket 410, the juice spur gear 420, the bellows gear, and the shaft 460 to the roller sprocket 450. Rotate and the roller sprocket 450 is moved on the roller chain 130.

In addition, the rolling roller 470 which is inserted and rolled into the rail 120 is coupled to the end of the shaft 460 to support the load of the entire riding die 200 supported by the shaft 460. While the boarding die 200 is moved up and down along the rail (120).

As such, the load concentrated on the roller chain 130 by the rolling roller 470 is greatly reduced.

The one-way clutch bearing 480 is further provided between the longitudinal spur gear 440 and the roller sprocket 450.

The one-way clutch bearing is a known configuration mainly used for a chain sprocket of a bicycle, and is generally capable of rotating in only one direction. When the longitudinal spur gear 440 rotates in a direction in which the boarding die 200 rises, Since the one-way clutch bearing 480 is fixed, the transmission force of the longitudinal spur gear 440 is directly transmitted to the roller sprocket 450.

However, since the one-way clutch bearing 480 rotates when the longitudinal spur gear 440 rotates in the direction in which the boarding die 200 descends, the transmission force of the longitudinal spur gear 440 is the roller sprocket 450. Is not delivered).

Therefore, when the user rotates the driving wheel 300 in the downward direction, only the spur gear 440 is rotated, and the roller sprocket 450 is in a stopped state, which is to be described later by the rotation of the driving wheel 300. When the means 500 operates, the roller sprocket 450 is driven down the roller chain 130 by its own weight.

Next, the fall prevention means 500 will be described with reference to FIGS. 1, 4, and 5. 5 is a side schematic view showing the lowering prevention means shown in FIG.

The lowering prevention means 500 is a means for preventing the boarding die 200 to go down automatically by the power transmission means 400 or to go down without an external force while the boarding die 200 descends from above. Press roller 510, swing lever 520, block 530, stopper 540, ratchet 550, consisting of a tension spring 560, the power transmission means 400 is provided on one side, It is fixed to the base 210 and linked to the wheel chain 310.

As shown in FIG. 5, a block 530 having a rectangular case shape is provided on the base 210, and a swing lever 520 having a shaft shape is rotatably coupled through the block 530 to swing the swing. The upper surface of the lever 520 is coupled to the self-rotating circular push roller 510.

At this time, the push roller 510 is connected to the wheel chain 310, the wheel chain 310 has a shape in which a curved concave-convex is formed on the surface as shown, as the wheel chain 310 moves The push roller 510 alternately connects the convex and concave portions of the wheel chain 310, thereby causing the swing lever 520 to reciprocate and rotate within a predetermined angle range.

In addition, the swing lever 520 extends to the outside of the block 530, and a stopper 540 is coupled to an end thereof. The stopper 540 has a shape in which one end is inclined as shown in FIG. The lever 520 is rotatable about an axis.

In addition, a tension spring 560 is provided between the stopper 540 and the housing 430 to pull the stopper 540 so that the push roller 510 is always connected to the wheel chain 310.

Meanwhile, a plurality of ratchets 550 having a trapezoidal shape are continuously arranged along an upper portion of the rail 120 of the guide frame 100.

Since the ratchet 550 forms a space that can be interlocked with each other, the end portions of the stopper 540 are inserted and caught between the ratchet 550, thereby allowing the entire riding die 200 to stop without lowering itself. do.

Here, the lowering prevention means 500 may be installed only in one of the power transmission means 400 and referring to the bar shown in FIG. 1, the lowering prevention means 500 may be installed together in the power transmission means 400 below the guide frame 100. It is suitable to be.

For reference, the lowering prevention means 500 is to be made of a material having a strong hardness, durability, wear resistance because it must withstand the load of the boarding die 200, wheelchairs and people.

Hereinafter, the operation of the present invention will be briefly described.

If you go up the stairs first.

A wheelchair occupant pulls the wheelchair and climbs up the footrest 230 to open the door and board the base 210.

When the auxiliary wheel 320 is held by the hand and rotates forward, the driving wheel 300 rotates, and when the wheel chain 310 moves, the wheel sprocket 410, the juice gear 420, and the bell spurs. The gear 440, the shaft 460, and the roller sprocket 450 rotate in succession, and the roller sprocket 450 rotates on the roller chain 130.

As a result, the entire riding die 200 ascends along the inclined roller chain 130 and at the same time the rolling roller 470 also rolls up along the rail 120.

At this time, since the rotation radius of the driving wheel 300 is large and each configuration of the power transmission means 400 is small, the principle of work allows the user to easily climb the stairs with very little force.

For example, if the load including the boarding die 200 is 200kg, the force required to rotate manually is only about 1kg.

On the other hand, even if the occupant puts the auxiliary wheel 320 up the stairs, the fall prevention means 500 does not slide down by itself.

In detail, the push roller 510 which is in contact with the surface of the wheel chain 310 when the drive wheel 300 is raised by the rotation of the wheel chain 310 is oscillated because of the convex shape of the wheel chain 310 The stopper 540 is caught by the ratchet 550.

Therefore, the stopper 540 is not obstructed when going up, but if it stops in the middle, the boarding die 200 may be pushed back a little, but the stopper 540 is caught by the ratchet 550 to prevent falling. .

The next step is to descend the stairs.

Likewise, when the passenger boards the boarding die 200 and the occupant turns the auxiliary wheel 320, the roller sprocket 450 descends by rolling the clouds along the roller chain 130 by the power transmission means 400. .

In this case, the lowering prevention means 500 immediately acts as a brake due to the weight of the boarding die 200, and the push roller 510 swings up and down continuously by the movement of the wheel chain 310. When the stopper 540 is separated from the ratchet 550 by swinging the swing lever 520 on the shaft, the stopper 540 descends the predetermined distance and then the stopper 540 latches the ratchet 550. It stops again the moment it takes between).

Therefore, if the above operation is repeated, the boarding die 200 is lowered at an appropriate speed.

On the other hand, the above described only the case in which the occupant can operate manually, of course, can be automatically operated by interlocking the drive wheel and the motor.

As described above, the present invention is a device capable of manually lifting and lowering stairs by driving a chain and a sprocket, and thus, the exemplary technical scope of the present invention should be determined by the claims. do.

1 is a side view showing a lift device for a wheelchair according to an embodiment of the present invention.

2 is a cross-sectional view taken along line AA ′ of FIG. 1 showing a guide frame of the present invention;

3 is a cross-sectional view taken along line BB ′ of the power transmission means of the present invention.

4 is a cross-sectional view taken along line CC ′ of FIG. 1 showing the drop preventing means of the present invention.

Figure 5 is a side schematic view showing the lowering prevention means shown in FIG.

<< Explanation of symbols for main part of drawing >>

100: guide frame 110: support frame

112: fixing member 120: rail

130: roller chain 200: boarding die

210: base 220: handle

230: scaffold 240: door

300: driving wheel 310: wheel chain

320: auxiliary wheel 400: power transmission means

410: wheel sprocket 420: juice pu gear

430: housing 440: longitudinal spur gear

450: roller sprocket 460: shaft

470: rolling roller 480: one-way clutch bearing

500: lowering prevention means 510: pressing roller

520: swing lever 530: block

540: stopper 550: ratchet

560: tension spring

Claims (6)

A wheelchair stair lift device for elevating a person in a wheelchair along a stair railing, A pair of guide frames 100 disposed parallel to both sides along the stairs; Both sides are supported by the guide frame 100, the boarding die 200 to move up and down along the guide frame 100; A pair of driving wheels 300 rotatably coupled to both sides of the boarding die 200; A power transmission means 400 for transmitting the rotational force of the driving wheel 300 so that the boarding die 200 is elevated along the guide frame 100; Stepped up and down equipment for wheelchairs, characterized in that consisting of; fall prevention means (500) coupled to the power transmission means (400) to prevent the boarding die (200) from falling. The method of claim 1, The guide frame 100 is composed of a long support frame 110, a rail 120 arranged along the support frame 110 and a roller chain 130 provided on the side of each rail 120, Wheel drive stairs lifting equipment characterized in that the wheel chain 310 is wound around the drive wheel 300 is fixed. The method of claim 2, The power transmission means 400 is a wheel sprocket 410 that is interlocked with the drive wheel 300 rotates, a juice gear 420 that is linked to the wheel sprocket 410, and the wheel sprocket 410 And the housing 430 for fixing the juice gear 420 to the boarding die 200, the longitudinal spur gear 440 interlocked with the juice spur gear 420, and the vertical spur gear 440. And a roller sprocket 450 rotating along the roller chain 130, a shaft 460 connecting the longitudinal spur gear 440 and the roller sprocket 450 provided at both sides of the boarding die 200; One-way clutch coupled to the end of the shaft 460 and installed between the rolling roller 470 rolling along the rail 120 and the longitudinal spur gear 440 and the roller sprocket 450 to transmit rotational force in only one direction. Wheelchair staircase lifting equipment characterized in that consisting of a bearing (480). The method of claim 3, wherein The lowering prevention means 500, The push roller 510 connected to the wheel chain 310, the axial swing lever 520 coupled to the bottom of the push roller 510, and the swing lever 520 to the boarding die 200. A block 530 for fixing, a stopper 540 having one end coupled to an end of the swing lever 520 and rotatable about the swing lever 520, and the stopper 540 on one side of the rail 120. Toothed ratchet 550 to step the other end of the step; and the tension spring 560 to connect the block 530 and the stopper 540 so that the stopper 540 is caught by the ratchet 550 ), The pressing roller 510 is pressed by the pressing of the moving wheel chain 310 so that the end portion of the stopper 540 is separated from the ratchet 550, the wheelchair lifting device. The method according to any one of claims 1 to 4, Inside the driving wheel 300, the wheelchair step lifting equipment, characterized in that the auxiliary wheel 320 is further provided to rotate the driving wheel 300 by the passenger by hand. The method according to any one of claims 1 to 4, The boarding die 200 is, Opening and closing between the base 210 for supporting a wheelchair, the handle 220 placed on both sides of the base 210, the footrest 230 coupled to the front of the base 210, and the handle 220 Wheelchair staircase lifting equipment characterized in that consisting of a possible door 240 coupled.

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