KR20000066391A - Stair climbing wheel chair - Google Patents

Abstract

PURPOSE: A wheelchair to enable a handicapped person to move freely and conveniently on a wheelchair and regulate the wheelchair from side to side while going up a flight of stairs stably. CONSTITUTION: The wheelchair comprises a first stair upward device(30) installed in the lower part of the wheelchair; a second stair upward device(50) capable of relative-rotary movement each other by communizing one axis with the first stair upward device(30); a slider device(70) having a slider instrument capable of moving in a length direction of the wheelchair; a connecting device comprising a first connector(43) to connect a free-end side of the first stair upward device(30) with a side of the wheelchair, a second connector(45) to connect a free-end side of the second stair upward device(50) with a side of the wheelchair, a third connector(47) to connect the first stair upward device(30) with the second connector(45) and a slider(75); a slide driving device(90,93) to drive a slider instrument of the slider device(70); and a stair upward device driving device to drive the first stair upward device(30) or the second stair upward device(50).

Description

Wheelchair which can climb stairs {Stair climbing wheel chair}

The present invention relates to a wheelchair that can climb stairs.

The wheelchair includes a chair and wheels attached to both sides of the chair, so that a disabled person with an uncomfortable leg can move to a desired place by rolling the wheel after seating on the chair of the wheelchair.

In many cases, stairs are provided as a means for moving two places of different heights. However, it is not possible for the wheelchair to climb the stairs, and in general, a lift for moving the wheelchair or a bypass to which the wheelchair can climb is provided separately from the stairs. However, there are some cases in which there is no means for the wheelchair to climb stairs such as a lift or a bypass road, and in such a case, freedom of movement of the disabled using the wheelchair is greatly limited.

Therefore, wheelchairs capable of climbing stairs have long been desired. Wheelchairs that can climb stairs allow people with disabilities to move through existing stairs, without the need for extra staircase facilities. Wheelchairs that can climb stairs significantly increase the freedom of movement for people with disabilities.

Furthermore, when the wheelchair climbs the stairs, it is important that the disabled person sitting on the wheelchair have a sense of stability. If you go up the stairs, but there is a slip below the stairs, or if you are unstable, the comfort of the wheelchair climbing stairs will be reduced. Therefore, there is a need for a wheelchair that allows the disabled to feel stable while climbing the stairs. It is also necessary to be able to adjust the left and right while climbing the stairs. The wheelchair, which can be adjusted left and right while climbing the stairs, can respond appropriately to obstacles (for example, those who come down) encountered when moving the stairs.

The present invention satisfies the above needs and requirements. It is an object of the present invention to provide a wheelchair which increases the freedom of movement of the disabled and the convenience of using the wheelchair of the disabled. Firstly, the present invention provides a wheelchair that can climb stairs. In another aspect, the present invention provides a wheelchair for climbing the stairs with a sense of stability. Furthermore, the present invention provides a wheelchair that is adjusted left and right while climbing stairs.

The wheelchair according to the present invention has a first wheelchair stair climbing means installed in the lower portion of the wheelchair, and a second wheelchair stair climbing means capable of relative rotational movement with each other by sharing one axis with the first wheelchair stair climbing means. In addition, the wheelchair climbing stairs according to the present invention has a slider mechanism that is movable in the longitudinal direction of the wheelchair. Furthermore, the wheelchair climbing the stairs according to the present invention has a connecting mechanism. The connecting mechanism includes: a first connector connecting the free end side of the first wheelchair stair climbing means and the side of the wheelchair; a second connector connecting the free end side of the second wheelchair stair rising means and the side of the wheelchair; And a third connector connecting said second connector with said first wheelchair stairwell means and simultaneously with said slider, wherein each connector is connected via a rotary treatment. In addition, the wheel chair for climbing the stairs according to the present invention has a slider driving device for driving the slider mechanism, and a step climbing device driving device for driving the first wheelchair step climbing means or the second wheelchair step climbing means. Thus, the wheelchair climbing stairs according to the present invention comprises a link between the first wheelchair climbing means, the slider, the first connector, the second connector, the third connector, and the wheelchair, respectively, to form a restraint chain as a whole. Therefore, as the slider which forms a link by driving the slider drive moves along the longitudinal direction of the wheelchair, the links forming the constrained chain may link and move up the stairs in a stable manner. . Next, the first or the second wheelchair stair climbing means is operated by the operation of the stair climbing means drive device so that the wheelchair climbs the stairs. After climbing the stairs, the slider drive again operates in the reverse direction, with the result that the one-link slider moves along the longitudinal direction of the wheelchair in the opposite direction of motion so far. Then, the links constituting the wheelchair climbing the stairs according to the present invention is a link movement, the wheelchair is restored to its original state. In one embodiment of the invention, the first and second wheelchair stair climbing means is a caterpillar device. Such a caterpillar device includes at least two sprockets and a chain installed over them, and a triangular shoe installed in a pin connection to the chain, wherein the shoe has a gap groove in a portion of the chain and the pin connection portion. . Some of the pinned portions of the chain have a gap groove so that when the pin crosses the circumference of the sugar sprocket, the pin naturally moves over the circumference of the sprocket. In addition, the triangular shoe is in contact with the jaws of the staircase, which produces a stronger friction force and repulsive force against the staircase than the rubber caterpillar. Thus, the wheelchair climbing the stairs is prevented from sliding downward. In one embodiment of the present invention, the slider mechanism device includes a screw installed in the longitudinal direction of the wheelchair, and a slider member having a screw nut mounted therein. The slider drive is also a bidirectional motor. Thus, the screw rotates in accordance with the operation of the motor, which is the slider drive, and accordingly the slider moves in the longitudinal direction along the screw in accordance with the action of the screw nut. The direction of motion will depend on the direction of rotation of the motor. In addition, the wheelchair climbing stairs according to the present invention may further have a support device installed on the lower portion of the wheelchair including a support member, the support member front and rear drive mechanism and the support member front and rear drive mechanism drive means to support the wheelchair. . The drive member before and after the drive member is driven by the operation of the drive member drive means before and after the support member as a result, the support member protrudes to the back of the wheelchair if necessary to support the wheelchair, and usually return to the lower surface of the wheelchair. The support device increases the stability of the wheelchair climbing stairs according to the present invention. In one embodiment of the present invention, the first wheelchair stair climbing means and the second wheelchair stair climbing means are each present in a pair. Furthermore, the wheelchair stair climbing means drive device has two driving means, each driving means drives one of the pair of wheelchair stair climbing means. By controlling the rotational speed of each drive means to have a difference, the wheelchair climbing the stairs according to the present invention can be adjusted left and right. The first wheelchair stair climbing means and the second wheelchair stair climbing means may be present one by one, not in pairs. In that case, a separate adjusting device for adjusting left and right may be added.

The invention will now be more fully understood by the embodiments described with reference to the accompanying drawings.

1 is a side view of one embodiment of a wheelchair climbing stairs in accordance with the present invention;

2 is a front view of FIG. 1;

Figure 3 is a plan view showing a caterpillar device assembly support frame;

4 and 5 show the structure of the caterpillar device assembly according to the present invention;

6 is a perspective view showing a support device installed on the caterpillar device support frame;

7 is a view showing a link structure of a wheelchair climbing stairs according to the present invention;

8 is a view showing a link movement of the wheelchair climbing stairs according to the present invention; And

9 is a view showing the action of climbing the stairs in a wheelchair climbing stairs according to the present invention.

1 is a side view of one embodiment 100 of a wheelchair climbing stairs in accordance with the present invention and FIG. 2 is a front view thereof.

First, the wheelchair 10 is seen. This wheelchair 10 is a general wheelchair having wheels 17 and support frames 13 and 15 on both sides thereof. In addition, it has an adjustment wheel 18 installed in the lower portion of the support frame (13). The adjustment wheel 18 is rotated 360 ° with respect to the support frame 13, and the 360 ° rotated state is shown as an imaginary line 18 '.

The first wheelchair stair climbing means 30 is installed below the wheelchair 10. In addition, the second wheelchair stair climbing means 50 is installed so as to share one axis 35 with the first wheelchair stair climbing means. Thus, the first wheelchair stair climbing means and the second wheelchair stair climbing means are rotatable relative to each other. In this embodiment, the first wheelchair stair climbing means and the second wheelchair stair climbing means are caterpillar device assemblies.

The slider mechanism is installed between the support frames 13 and 15 of the wheelchair 10. First, the screw bar 77 is installed between the support frames 13 and 15 via a bushing, as shown. The screw bar 77 is provided with a slider member 75 having a screw nut therein. Therefore, when the screw bar rotates, the slider member moves along the screw bar. As shown, the screw bar 77 is connected through a sprocket-chain connection 93 and a motor 90 which is a slider drive means. The motor 90 is a bidirectional motor. Therefore, the rotational force of the motor 90 is transmitted to the screwbar 73 via the sprocket-chain connection 93 and as a result the slider 75 moves along the side of the wheelchair. The direction of movement of the slider 75 will depend on the direction of rotation of the motor 90. Guide bars 72 and 74 supporting the slider 75 pass through the slider and are installed between the support frames 13 and 15. It is shown that the slider 75 is moved to the forefront by the virtual line 75 '. An elastic device (not shown) such as a spring may be installed between the slider 75 and the support frame 15. Then, when the slider 75 moves toward the support frame 13 side in accordance with the rotation of the motor 90, the elastic device pushes the slider toward the support frame 13 side. Therefore, the motor 90 can initially drive the slider 75 with little power. That is, the load on the motor 90 is reduced for the inertial force that must be overcome in order to initially drive the slider 75. This means that a smaller capacity of the motor 90 can be used.

The wheelchair climbing stairs according to the present invention has a connecting device 40. The connecting device includes a first connector 43 connecting the free end side of the first wheelchair stair climbing means 30 and the side of the wheelchair, and the free end side of the second wheelchair stair climbing means 50 and the wheelchair. And a second connector (45) for connecting the side and a third connector (47) for connecting the second connector and the first wheelchair stairwell means and simultaneously with the slider. The connection is rotationally treated.

In this embodiment, the first connector 43 connects the front wheel shaft 33 of the caterpillar device 30 constituting the first wheelchair stair climbing means with the lower side 12 of the frame of the wheelchair. In addition, the connection between the front wheel shaft 33 and the frame side 12 of the first connector 43 is rotationally treated.

In the present embodiment, the second connector 45 connects the rear wheel shaft 55 of the caterpillar device 50 constituting the second wheelchair stair climbing means with the upper side 14 of the wheelchair. In addition, the connection between the rear wheel shaft 55 and the upper frame side 14 of the second connector is rotationally treated.

In this figure, the first and second connectors are merely shown as straight lines, but may be, for example, bars.

In this embodiment, the third connector 47 is connected to the rear wheel 35 of the first caterpillar device assembly 30 and the rear wheel 55 of the second caterpillar device assembly 50 to which the second connector 45 is connected. And the slider 75 is connected. In this embodiment, the third connector has a triangular shape. The third connector also has a rotational treatment in connection with the rear wheels 35, 55 and the slider 75.

Methods of achieving rotation treatment are well known. For example a pin connection would be possible.

As will be described later, the first wheelchair climbing means 30, the slider 75, the first connector 43, the second connector 45, the third connector 47 and the wheelchair 10 are respectively Links are formed to form a restraint chain as a whole.

As can be seen with reference to FIG. 2, in this embodiment, the first and second step climbing means 30, 50, the slider mechanism 70, and the connecting device 40 are each provided in pairs. A stair climbing means driving device 80 for driving the wheelchair stair climbing means 30 or 50 is installed. In this embodiment the drive means comprises two motors 81 and 83, each of which drives each of the first caterpillar device assembly 30 in pairs.

In addition, the wheelchair climbing stairs according to the present invention has a support device (20). This is described later.

3 shows a caterpillar device support frame 60 in which the first and second caterpillar device assemblies 30 and 50 of the wheelchair climbing stairs and the drive means 81 and 83 are installed according to the present invention. As shown, the support frame has a first frame element 63 and a second frame element 65, on which drive means 81, 83 are mounted. In addition, the front wheel shaft 33 of the first caterpillar device assembly 30 is divided into two. Each drive means 81, 83 transmits power via sprocket-chain connections 86, 88 to respective divided shafts 33 of the paired first caterpillar device assembly 30, respectively.

4 and 5 is a view showing the structure of one embodiment of a caterpillar device assembly according to the present invention.

Caterpillar device assembly 200 according to the present invention has a sprocket 210, 220 constituting the front and rear wheels, the chain 230 is installed over them. As shown in the chain, a plurality of shoes 250 having a triangular shape are installed. The shoe 250 is installed in the chain 230 with pin joints 265 and 275. The shoe has a gap groove 280 among the pin joint portions of the shoe and the chain. In this figure, the pin 275 is installed in the gap groove 280. Referring to (a), (b), (c) and (d) of FIG. 5, the rotation of the sprockets 210, 220 causes the chain 230 to rotate, with the result that the individual shoe 250 is connected to the chain. Rotate accordingly. When the circumference of the sugar sprocket 220 is exceeded, the pin 275 moves along the gap groove. As a result, the shoe can naturally cross the circumference of the sprocket. This series of processes is well illustrated in Figures 5 (a), (b), (c) and (d). As the triangular shoe touches the stairs, it creates strong friction and repulsion with the stairs. Thus, when climbing the stairs, slipping downward is prevented.

6 shows the support device 20 installed on the caterpillar device support frame 60. The support device comprises a support member 23, the support member forward and backward drive mechanisms 25, 26, 27 and the support member forward and backward drive mechanism drive means 24. In this embodiment, one end of the support member 23 is bent by the ?? character and the bent portion supports the wheelchair with respect to the ground. The driving mechanism for driving the support member 23 is composed of two pulleys 25 and 26 and a belt 27 installed therethrough. The motor 24 drives the belt. The support member connecting rod 28 is connected to the belt 27 by bolt nut connection. The connecting rod 28 is also supported by two guides 22. The motor 24 is a bidirectional motor. Thus, the rotational force of the motor drives the belt and as a result the support member 23 will move along the guide. At this time, according to the rotation direction of the motor 24, the support member 23 moves forward or backward.

The operation of the present invention configured as described above will be described.

In the present invention, the first wheelchair climbing means 30, the slider 75, the first connector 43, the second connector 45, the third connector 47, and the side surfaces 12 and 14 of the wheelchair are as shown in FIG. 7. Links are formed to form a constrained chain. By the operation of the slider drive means 90 the slider 75 moves along the side of the wheelchair. The links thus form a link movement. 8 shows a link motion according to the movement of the slider 75. That is, the wheelchair climbing the stairs according to the present invention according to the forward movement of the slider 75 constituting one link is subjected to the link movement as shown in Figure 8 (a) to (g).

Now, the operation of the wheelchair climbing the stairs according to the present invention will be described with reference to FIG.

First, referring to FIG. 9 (a), the case where the wheelchair touches the stairs is illustrated. When the stairs are in contact with each other, the slider driving means 90 which is a bidirectional motor is operated. The screw 77 then rotates and thus the slider 75 moves along the guides 72, 74. FIG. 9B shows the case where the slider 75 moves, for example, 50 mm along the screw. In the figure, the numerical display at the top indicates the distance the slider has moved. When the slider 75 moves 50 mm along the screw, as shown, the second caterpillar device assembly 50 makes a counterclockwise rotation in the figure and the wheelchair is lifted. Next, as the slider 75 continues to move, the wheelchair gradually tilts backward and the second caterpillar device assembly 50 continues to rotate counterclockwise to gradually become parallel with the first caterpillar device assembly 30. FIG. 9C shows a case where the slider is moved 245 mm, and FIG. 9 (D) shows a case where the slider is moved 245 mm. The second caterpillar device assembly 50 is in parallel with the first caterpillar device assemblies 30, 30 ′ when the slider 75 makes a 245 mm movement. Therefore, when the caterpillar device assembly is operated in this state, the stairs can be easily climbed. That is, it can be seen that the caterpillar device assembly can be climbed to the jaws of the inclined stairs through the operation of FIGS. 9A to 9D. However, the present invention not only allows the caterpillar device assembly to cross the chin of the stairs, but also allows the seated person to have a sense of stability. That is, as can be seen in Figure 9 (d), when the caterpillar device assembly (30, 50) as a result of the link movement according to the present invention is able to climb over the chin of the stairs, the chair 10 of the wheelchair and the ground Parallel. As shown in FIG. 9D, the caterpillar drives 81 and 83 are operated in a state where the second caterpillar device assembly 50 is parallel to the first caterpillar device assembly 30. The wheelchair 100 then climbs the stairs by the rotation of the caterpillar of the first and second caterpillar drive assembly. This state is shown in Figs. 9 (e) and (f). At this time, as shown, the wheelchair can be seen to rise in parallel with the ground. The case where the second caterpillar device assembly 50 reaches the uppermost step is shown in FIG. 9 (f). In this state, operate the slide drive again. The slider 75 then moves continuously. Accordingly, as shown in FIG. 9 (g), the second caterpillar device assembly 50 further rotates in a counterclockwise direction so that the second caterpillar device assembly 50 reaches the flat ground beyond the stairs and the first caterpillar device The assembly 30 is still staying on the stairs. FIG. 9 (g) shows a case where the slider 75 moves from 245 mm to 300 mm in the previous state. In the state of FIG. 9 (g), the caterpillar is operated by the caterpillar drive again, and the wheelchair moves to the state of FIG. 9 (h). At this time, the wheelchair 100 has climbed all the stairs, but the first caterpillar device assembly and the second caterpillar device assembly are not returned to their original state. In this state, the slider drive means 90 rotates the screw 77 in the opposite direction. If a two-way motor is used, this reverse rotation can be easily achieved. When the screw is rotated in the opposite direction, the slider 75 also moves in the opposite direction of the movement path so far. Accordingly, the second caterpillar device assembly 50 makes a clockwise rotation, and the first caterpillar device assembly 30 makes a counterclockwise rotation. Fig. 9 (i) shows the case where the slider 75 returns to the position of 245 mm again. Continuously moving to the original position of the slider 75, the first caterpillar device assembly and the second caterpillar device assembly are in parallel (Fig. 9 (i)), the first caterpillar device by the weight of the next wheelchair and seated person The assembly is parallel to the floor and only the second caterpillar device assembly is tilted. (Fig. 9 (j)). In this state, the wheelchair support member 23 described above may protrude to the rear of the wheelchair by the support device 20. By the protruding wheelchair support member 23, the wheelchair can be stably maintained in balance. In this state, the slider 75 continuously moves to the original position, and thus the second caterpillar device assembly 50 gradually rotates clockwise to return to its original state (Fig. 9 (j). ) (M)) After the second caterpillar device assembly is completely returned to its original position, the wheelchair support member 23 is retracted toward the front wheel and inserted into it (FIG. 9 (n)).

In this way, the wheelchair climbing the stairs according to the present invention climbs the stairs. In addition, the wheelchair climbing the stairs according to the present invention can be adjusted left and right by adjusting the rotational speed of the motor (81, 83), which is the drive unit of the caterpillar device assembly. Techniques for adjusting the rotational speed of the two motors are widely known, and a detailed description thereof will be omitted.

It will be appreciated that the various objects described above have been achieved by the present invention. In particular, the wheelchair climbing stairs according to the present invention can be adjusted left and right at the same time as the wheelchair climbs the stairs stably. Accordingly, the convenience, mobility and stability of the wheelchair use of the disabled is maximized.

Although the present invention has been described with reference to the examples, it will be apparent that the present invention is not necessarily limited thereto, and the scope of the present invention is defined by the following claims.

Claims (8)

In a wheelchair, (a) a first wheelchair stair climbing means installed below the wheelchair; (b) second wheelchair stair climbing means sharing a single axis with the first wheelchair stair climbing means and allowing relative rotational movement therebetween; (c) a slider device having a slider mechanism movable in the longitudinal direction of the wheelchair; (d) a first connector connecting the free end side of the first wheelchair stair climbing means and the side of the wheelchair, a second connector connecting the free end side of the second wheelchair stair rising means and the side of the wheelchair; And a third connector for connecting a second connector to the first wheelchair stairwell means and simultaneously connecting the slider, wherein each connector comprises: a connection device in which the connection is rotationally treated; (e) a slide drive for driving the slider mechanism of the slider device; And (f) a stair climbing means driving device for driving said first wheelchair stair climbing means or said second wheelchair stair climbing means, Wherein the first wheelchair ascending means, the slider, the first connector, the second connector, the third connector and the wheelchair each form a link to form a restraint chain as a whole. The method of claim 1, And the first wheelchair stair climbing means and the second wheelchair stair climbing means exist in pairs, respectively. The method according to claim 1 or 2, The slider device includes a screw installed in the longitudinal direction of the wheelchair, and a slider member having a screw nut mounted therein, the slider drive is a wheelchair climbing stairs, characterized in that the motor in both directions. The method of claim 1, The wheelchair stair climbing means is a wheelchair climbing stairs, characterized in that the caterpillar device. The method of claim 4, wherein The caterpillar device includes at least two sprockets and a chain installed therethrough, and a triangular shoe installed in a pin connection to the chain, wherein the shoe has a gap groove in a portion of the chain and the pin connection portion. Wheelchair climbing stairs characterized in that. In any one of the foregoing, As being installed in the lower part of the wheelchair and supporting a wheelchair, And a support device comprising a support member, a drive mechanism before and after the support member, and a drive means drive mechanism before and after the support member. The method of claim 2, The wheelchair stair climbing means driving device has two driving means, each driving means drives one of a pair, and controls the rotational speed of each driving means to have a difference, it is possible to adjust the left and right Wheelchair to climb stairs. In the wheelchair having a caterpillar device in the lower part and going up a stairs, The caterpillar device includes at least two sprockets and a chain installed therethrough, and a triangular shoe that is pin-connected to the chain, wherein the shoe has a groove of one of the chain and the pin connecting portion. Wheelchair climbing stairs characterized in that.