JP2002178930A - Carrier capable of traveling on stairway - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a carrier capable of traveling like a wheelchair at traveling on a plane space and smoothly and continuously traveling with a stable backward tilting attitude with a low center of gravity at traveling on a stairway with one carrier and capable of easily switching between a plane space traveling mode and a stairway traveling mode. SOLUTION: A stairway traveling conveyer is always attached on a plane space traveling vehicle. During traveling on the plane space, the stairway traveling conveyer is reduced and accommodated in the plane space traveling vehicle and the carrier can travel like the wheelchair. During traveling on the stairway, the stairway traveling conveyer is tilted backward to ground on the stairway and a load receiving range of the stairway traveling conveyer is extended so that the whole gravity is moved near a center of the load receiving range and the carrier can travel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transport vehicle capable of traveling on a stepped path such as a staircase which is difficult to pass with a conventional wheelchair or the like.

[0002]

2. Description of the Related Art Wheelchairs and electric vehicles have been widely used so far when traveling on flat terrain, but wheelchairs and the like cannot cope with movement of buildings or stairs on general roads without stair moving equipment. For this reason, various types of step moving devices have been devised.
A crawler-type stairway traveling vehicle that lifts a person in a wheelchair and runs on stairs, with a flat-level traveling vehicle and a stairway traveling vehicle separated and an integrated type with a crawler-type traveling vehicle equipped with a seat . A wheelchair is connected to a staircase traveling vehicle that attaches running wheels to the eccentric shafts of two sets of crankshafts having different axes without using crawlers, etc., and the two sets of wheels approach and separate from each other and move up and down the stairs one by one. There are things that run on stairs.

[0003]

SUMMARY OF THE INVENTION In a conventional stair running vehicle,
If the vehicle is to be lifted up by a stairway vehicle while traveling on stairs while a person is in a wheelchair, the stairway vehicle must be used at a specific location, stored on the spot, and run on a general road in a wheelchair. We cannot cope with stairs and steps where there is no car. A crawler type stair running vehicle capable of traveling on flat ground has a short contact area due to a long ground contact portion, has a small traveling wheel diameter, has a small distance between a vehicle body and a road surface, and has a heavy weight, which is not suitable for traveling on a general road. In addition, in the crawler type, the passenger is lifted high from the stairs because the wheelchair is lifted and the stairs are run, and the angle of the seat and crawler is not continuous with the stairs at the top of the stairs. Gives fear. For running on stairs, put a wheelchair on a stair running vehicle and fix it.
Removal work is also required.

[0004] A staircase traveling vehicle having traveling wheels mounted on eccentric shafts of two sets of crankshafts having different shaft centers has excellent small turnability, but the caregiver must always support the other end because it is laterally supported at one point. No. In addition, there is a change in the load to be supported by the change in the position of the ground contact point of the wheel, and furthermore, when going up the stairs, walking backwards, which places a heavy burden on the caregiver. In addition, when the steps are small because the wheels move up and down with a constant stroke, the pulsation is large, giving the passenger discomfort and wasting the driving force. For wheelchairs and stairs traveling
It also requires disassembly and the removal of the rear wheel.

[0005] Further, in the case of moving by car in the stair running vehicles of each system, it is useless for transferring passengers and storing wheelchairs.

[0006] The present invention has been made in view of such circumstances, and a single transport vehicle can travel on flat ground and on stairs.
It is assumed that the driving mode can be easily converted. When traveling on flat terrain, it is similar to a wheelchair.When traveling on stairs, the center of gravity of the occupant is lowered from the slope connecting the corners of the stairs with a straight line. To provide a transportable vehicle that can run on stairs.

[0007]

In order to achieve the above-mentioned object, the present invention is based on a flat-land vehicle that has been used for a long time, and a stair-running function is incorporated in the flat-land vehicle and is always mounted. A flat-land vehicle has a seating surface, a backrest, a headrest, an armrest, a footrest, and a front wheel caster similar to a wheelchair. The armrest may be a detachable type or a swing type in consideration of getting on and off. The rear wheel can be in a normal wheelchair position when traveling on flat terrain, but in order to lower the center of gravity when traveling on stairs, it is necessary to escape so that the rear wheel does not interfere with the stairs. Attach. The swing frame has left and right arms to which a rear wheel axle is fixed, fixed by a connecting rod at a rotation fulcrum, and swings back and forth by swing means provided between the swing frame and the vehicle body.

For the stair running, a conveyor with a driving band wound thereon is used. In the first aspect, the main conveyor which is in contact with two or more steps of the stairs and the auxiliary conveyor having a common drive shaft and a length of about 1/2 are used. Become. When traveling on level ground, the main conveyor is connected to the swing frame at a height that does not interfere with the road surface, and the auxiliary conveyor is supported by the drive shaft. And bendable about 90 degrees forward by a drive unit and arranged below the seating surface. Even if the caregiver does not support the carrier, stairs can be stably run. One point of support on the stairs is always on the ascending side and the descending side with respect to the vertical line passing through the center of gravity with the person on board. It is necessary. For this reason, when running on stairs, swing the auxiliary conveyor downward so that the grounding surface of the main conveyor and the grounding surface of the auxiliary conveyor are linear, and extend the two sets of conveyors in a straight line to cover a wide range with respect to the center of gravity. Support the load.

[0009] In contrast to the above method, in claim 3, a slide frame that slides on the conveyor frame in the direction of conveyor movement is provided as a set, and a flat road vehicle is mounted on the slide frame, and the flat road vehicle is moved upward. The supporting point on the descending side is secured by sliding and moving the center of gravity upward. The support point on the rising side of the center of gravity is secured by attaching a load supporting means to the slide frame so as to extend the conveyor ground contact surface in the stair rising direction and raising the slide frame together with the slide frame. A free wheel is provided at both ends of a frame as claimed in claim 5 or a support bar in which a sliding plate is attached to a bar whose tip is warped upward in a ski plate shape as claimed in claim 4 as load supporting means,
A free conveyor in which a belt is wound between both wheels is provided above the conveyor ground plane. The mounting position of the flat-land vehicle relative to the conveyor is such that, when running on stairs, the rear frame is lifted from the conveyor ground surface so that the rear wheel does not contact the stairs. Connect to swing frame.

[0010] In order to support the backward inclination posture at the time of completion of stairs ascending or at the start of descending from the uppermost part, in claim 1 the middle of the main conveyor and in claim 3 above the slide frame, the conveyor grounding surface is defined as a rotation fulcrum. Provide support means to
The structure is such that it always fits between the conveyor drive belts, and when used, rotates about 90 degrees and protrudes from the conveyor grounding surface to maintain its position. According to the fifteenth aspect, the drive belt of the conveyor is floated by the small wheels provided at the tip of the support means and the left and right rear wheels, and the movement before and after traveling on the stairs in the rearwardly inclined posture is facilitated.

According to a sixth aspect of the present invention, a commercially available four-way ball-containing guide is used for the guide of the slide frame on one side to regulate the up, down, left and right directions, and the other is a guide only in the up and down direction with respect to the conveyor ground plane. Consideration should be given to reducing the manufacturing accuracy of the guide and the rigidity of the frame.

The driving of the slide frame uses a ball screw, the upper end of the screw shaft is rotatably and axially supported by a conveyor frame, and the other end of the screw shaft is driven by a motor with a speed reducer. , And the nut is supported by the slide frame. In claim 8, one end of the belt-shaped drive belt is fixed above the conveyor frame instead of the ball screw, and the other end of the drive belt is hung on a pulley provided on the slide frame and wound around a drum provided above the conveyor frame. By the way,
The protrusions on the upper surface of the conveyor can be reduced.

An upward or downward U-shaped groove is urged in the lower part of the swing frame and a horizontal U-shaped groove and a spring are urged in the locking direction at the upper part of the swinging frame so that the conveyor unit can be easily attached to and detached from the flat-land vehicle. A lock pin for a connecting pin is provided, and a connecting pin corresponding to the U-shaped groove is fixed above and below the conveyor frame in claim 2, and above and below a slide frame in claim 9,
One-touch connection / separation is possible, and electrical wiring is also outlet type. There is a method of providing a U-shaped groove on the conveyor side and providing a connecting pin on the swing frame side.

In the twelfth aspect, the slide frame is slid upward to facilitate getting on and off the vehicle, and the drive wheel side of the conveyor is grounded, the rear portion of the flat vehicle is lifted to a forwardly inclined posture, and the conveyor is tilted forward. The ground makes it difficult to move the seat.

According to the thirteenth aspect, when traveling on a steep slope, the flat-land vehicle is directed upward, the slide frame is slid upward, the rear wheels are lifted on the drive wheel side of the conveyor, and the drive shaft is driven to drive. In this case, when the vehicle travels in the driving belt, the outer periphery becomes polygonal due to the unevenness of the outer surface of the driving belt, and vibration occurs between the driving belt and the road surface. For this reason, in claim 10, the traveling tire corresponding to the outer diameter of the driving band is fixed to the driving wheel in the vicinity of the driving band, and the vehicle is driven by the traveling tire.

If the outer periphery of the rear wheel of a flat-land vehicle is kept out of contact with the ground contact surface of the conveyor, there is no problem when the rear wheel diameter is small, but when the rear wheel diameter is large, the rear wheel is compared with an ordinary wheelchair when traveling on flat ground. Is leaning toward the front side and easily falls backward. There is also a method of providing auxiliary wheels at the lower part of the conveyor, but in claim 11, rear wheel axle mounting holes are provided at two places of the swing frame to prevent overturning, and when traveling on level ground, the rear part of the flat running vehicle is lifted by the conveyor, and the rear wheel To the rear mounting hole. In the twelfth aspect, the swing frame is provided with a rotation fulcrum in the front-rear direction, the upper end of the rear wheel arm is connected to the rotation fulcrum, and the rear wheel axle is attached to the lower end. Swing and cross the corners. When traveling on level ground, swing the rear wheel backward until the rear wheel can stably support the load, and stop the rear wheel arm with the stopper.

According to the sixteenth aspect, it is possible to assist the traveling by using a commercially available traveling drive motor incorporated in the rear wheels to improve the flatness traveling performance by increasing the own weight.

According to a seventeenth aspect of the present invention, there is provided a balancer using a compression spring or a gas spring between the vehicle body and the oscillating frame, using a telescopic bar with a brake to hold the oscillating position by manually oscillating the vehicle body and the oscillating frame. Reduce installation power.

The outer surface of the drive belt requires a strong frictional force for climbing the stairs, and the inner surface receives an extreme load at the corner of the stairs and moves while sliding on the frame side. . To reduce the frictional force, attach a rubber belt to the attachment of the roller type chain, or use a toothed belt in which the outer surface of the toothed belt is non-slip with priority given to weight and size reduction. A sliding plate having low frictional resistance is fixed to the sliding portion of the frame on the frame side. In order to further reduce the running resistance, a film-shaped slip belt having a small frictional resistance is circulated between the toothed belt and the sliding plate while the toothed belt rotates.

According to the nineteenth aspect, a detection lever having a detection surface longer than the stair pitch is used for detecting the uppermost step of the stairs so as to cope with a change in the angle or pitch of the stairs. A flat-land vehicle is also provided with a stair-running handle at the headrest portion and a flat-land running handle. The operation panel shall be portable so that it can walk forward from the lower side of the truck when going up stairs and forward when going down.

With the above configuration, the stair running function is always incorporated in the flat-land vehicle, so that the stair running can be performed anywhere. When traveling on level ground, the conveyor section is shortened and housed in a level terrain vehicle, so that the same getting on / off and small turning properties as a wheelchair can be secured. It is not necessary to switch between people or take a wheelchair to switch between flatland and staircase modes. When moving to stairs, when the swing frame is tilted backward, the rear wheels float off the stairs and the conveyor can touch the stairs. Extending the auxiliary conveyor or moving the slide frame upward moves the center of gravity to the vicinity of the center of the conveyor section, widening the load support range, maintaining stability and eliminating the need for the caregiver to support the carrier. . The rear wheel escapes from the stairs with the swing frame to lower the overall center of gravity and runs on the conveyor, so there is no pulsation at a constant speed and there is quietness, stability and security.

By using a conveyor for stair running and using a detecting lever longer than one pitch on the slope of the stairs for detecting the stairs, it is possible to flexibly cope with changes in the angle and pitch of the stairs. When getting on or off a flat-land vehicle, lift the rear part of the flat-land vehicle to the forward tilted position, and because the conveyor is on the ground, it is difficult to move, reducing the caregiver's standing and sitting power, and carelessly seating Prevent moving. When driving on a steep hill, the vehicle can be driven by driving the running tires by lifting the rear part of the flat-land vehicle, so that the vehicle can travel smoothly without vibration due to the driving band, and the caregiver's labor for moving can be reduced. If a car is a one-box car, getting on and off the car can be performed using the stair climbing function while the person is on board, and the problems of transfer of the care receiver and storage of the transporter can be solved. In addition, since the connection / separation between the flat-land vehicle and the conveyor unit is made one-touch, it is convenient to use it separately or carry it.

At the start of descending the stairs, where the person feels the most fearful, in order to alleviate the fear and increase safety, the patient is cared while leaning backward before approaching the stairs and supported by the rear wheels and the small wheels of the support arm. When the rear wheel passes through the end of the stairs at the descending entrance, the drive belt touches the ground and forcibly stops. At this position, the auxiliary conveyor is extended downward, or the upward movement of the slide frame and the lowering of the conveyor are simultaneously started at a constant speed as in claim 20, and the center of gravity is moved upward of the conveyor without changing the backward inclination angle. It is safe because you can move down while doing it.
In addition, since there is no need to support the transport vehicle, the operation panel is portable, and the user can step forward by walking forward, so that the burden on the caregiver can be reduced.

By using a conveyor for stair running, fluctuations in the driving torque are smaller than in the crank type, and the maximum torque is smaller. For the drive belt of the conveyor, use a lightweight and compact toothed belt with a smaller radius of rotation and a smaller pitch of unevenness than the crawler with anti-slip on the outer surface, and friction between the inner surface of the toothed belt and the sliding part of the frame. A sliding plate with low resistance is fixed to the frame, and a film-shaped slip belt is circulated between the inner surface of the toothed belt and the sliding plate to reduce the driving force and reduce the capacity of the drive system and battery to reduce the overall weight.・
Can be downsized.

[0025]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an embodiment of a stroller-equipped transport vehicle according to the present invention. FIG. 1 is a side view showing the whole of the present invention, and shows a state where the vehicle is traveling on stairs. Seat, backrest, headrest, armrest, footrest,
As shown in FIG. 2, a swing frame 2 that swings around a rotation fulcrum 4 at the rear of a seat surface of a vehicle body 10 having a front wheel caster has left and right arms fixed by connecting rods 2e. As shown in FIGS. 1 and 2, the axle of the rear wheel 3 and the main conveyor 20 are fixed to the swing frame 2, and a telescopic drive unit is provided at a fulcrum 7 of a swing arm 2f integrally provided on a connecting rod. One end of 5 is pivotally supported at a fulcrum 8 provided at the front end of the seat surface of the vehicle body 10 at the other end.

FIGS. 2 and 3 show details of the conveyor section. Drive wheels 24 are fixed to the left and right sides of a drive shaft 23 which is rotatably supported at one end of a conveyor frame 21. Driven wheel 25 with center-to-axis adjustment left and right
Are arranged rotatably. A chain 27 with an attachment is screwed between the two wheels as a driving band with an elastic rubber belt 26 screwed, and a guide rail 28 is provided between the conveyor frame 21 and the chain 27 with the attachment so that the grounding surface side is linear between the two wheels. Is fixed to the conveyor frame 21. The conveyor frame 31 of the auxiliary conveyor 30 having the same structure as the main conveyor 20 is rotatably supported from the center of the drive shaft 23, and the drive wheels 34 of the rubber belt 36 are fixed. In FIG. 2, the driving bands are two rows, but a single row may be provided at the center. The drive shaft 23 is driven by a motor 22 with a speed reducer attached to the conveyor frame 21. A brake drum 55 is fixed to the drive shaft 23, one end of a band 56 for tightening and releasing the brake drum 55 is supported by the conveyor frame 21, and the other end is provided with electric drive means (not shown) and a headrest portion of the vehicle body 10. Link with the brake lever.

In order to adjust the angle of the auxiliary conveyor 30 with respect to the main conveyor 20, one end of an extendable drive unit 54 is attached to a drive fulcrum 29 of the main conveyor 20 provided above the axis of the drive shaft 23 in FIG. The other end is pivotally supported at a driving fulcrum 39 of the auxiliary conveyor.

As shown in FIGS. 2 and 3, one end of the link 45 is pivotally supported at one end near the middle of the length of the main conveyer 20, and the support arm 41 having a small wheel 42 attached to the other end. Swing shaft 43 pivotally supported by conveyor frame 21
The arm 44 swings integrally with a segment gear 47 driven by a motor 46, and the other end of the link is rotatably connected to the tip of the arm 44. When the support means is housed, it is accommodated above the conveyor ground plane. When used, the arm 44 rotates and the fulcrums of the link 45 and the arm 44 are aligned, and the support arm 41 rotates about 90 degrees and protrudes from the ground plane. Set the dimensions so that

FIG. 4 shows a side view at the start of stair climbing. This shows a state in which the lower part of the swing frame 2 is rotated forward from the level running state, the main conveyor 20 is tilted rearward, and the auxiliary conveyor 30 is lowered to an intermediate position. When the auxiliary conveyor is further lowered, the main conveyor 20 and the ground contact surface can be made straight, and a transition is made to stair running.

The embodiment shown in FIGS. 5 and 6 uses the main conveyor 20.
The driven wheel 25a of b is floated from the ground contact surface, and an angle D is formed at the tip of the conveyor. The length L of the detecting portion of the detecting lever 91 for detecting the uppermost step of the stairs shown in FIG. 5 is longer than the step pitch P, one end is supported on the conveyor frame 21b by a hinge pin, and the other end is provided with a roller. Conveyor frame 21
When the detection lever 91 fitted in the guide groove of b and having the dog 92 functioning as a guide and a stopper function passes through the stepped corner, it rotates downward, and the movement of the dog 92 is detected by the sensor 93 to activate the support means 40. . Similarly, the position where the main conveyor 20b in FIG. 6 has moved up the uppermost stage is detected by the detection lever 96, and once stopped, the auxiliary conveyor 30a is raised. In this state, the user moves to a safe position away from the stairs, raises the swing frame 2 as shown in FIG.
And move to level terrain. Stair descent is the reverse procedure.

In FIG. 5, the swing of the swing frame 2a is replaced by the drive unit 5 and an extendable bar 5a with a brake is connected.
A swing handle 57 is provided at the upper center of the conveyor frame 21b.
The brake opening / closing lever 58 is provided on the handle portion of the vehicle body 10, and the angle of the swing frame 2a can be manually adjusted. One end of the telescopic bar with a brake is supported on one of the left and right arms of the swing frame 2a, and the balancer 59 using a compression spring is supported between the other arm and the vehicle body 10a.

The embodiment shown in FIG. 7 is an example of an attachment portion between the swing frame 2a and the main conveyor 20a.
The lower connecting pin 18 of the conveyor frame 21a is fitted into the lower U-shaped groove 52 from above. When the upper connecting pin 19 of the conveyor frame 21a is pushed from the side into the horizontal U-shaped groove 53 on the upper side of the swing frame 2a, the lock claw 51 urged to the lock side by a spring is pushed up on the swing frame 2a side to a predetermined position. When the lock claw 51 is fitted in the position, the pin is held in a locked state by a spring.

In the embodiment shown in FIG. 8, a rear wheel 3a incorporating a drive motor is used instead of the rear wheel 3.

The embodiment shown in FIG. 9 uses a toothed belt 71 in which a driving belt is integrally processed with a cover rubber in which the outer surface of the toothed belt is non-slip, and the inner surface of the toothed belt 71 and the conveyor frame 21b. A sliding plate 72 made of a material having a small coefficient of friction is fixed to the conveyor frame 21b at the sliding part of the conveyor frame 21b. A slip belt 73 having a ring-shaped metal plate having a small coefficient of friction between the toothed belt 71 and the sliding plate 72 is caused to rotate along with the toothed belt 71. FIG. 10 shows a cross section of the conveyor.

In the embodiment shown in FIGS. 11 and 12 (cross section of the conveyor), a guide rail 63 for regulating in four directions is fixed to one of the upper surfaces of the conveyor frame 61, and the guide block 65 is fixed to a slide frame 66. On the other side of the conveyor frame 61, a guide rail 62 that regulates only the vertical direction with respect to the conveyor grounding surface, a guide block 64
Sticks to the slide frame. Conveyor frame 61
One end of a ball screw shaft 68 is fixed to a rotation shaft of a drive motor 67 attached below the other, and the other end of the ball screw shaft 68 is rotatably and axially supported above the conveyor frame 61. The nut 69 connected to the ball screw shaft 68 is supported and driven by the slide frame 66 so as not to rotate. The slide frame 66 has a vehicle body 10
a connecting pins 18 and 19 according to FIG.
A load support rod 76 extending in the stairs ascending direction is fixed on the conveyor grounding surface or a surface floating about 10 mm. The tip of the load support bar 76 is bent upward, and a sliding plate 77 with little friction is stuck on the ground surface side.

As shown in FIG.
The support arm 41a having the rotation fulcrum near the contact surface of the bracket 78 fixed to the bracket is moved from the driving band to the contact surface side by about 9
When it is manually rotated by 0 degrees, it is stopped by a stopper 98 fixed to the side wall of the bracket 78, and in the reverse direction, a lock claw 79 urged toward the support arm by a spring and supported by the bracket 78 is cut out of the support arm. The support arm is fitted to the portion 81 to regulate the support arm. When the support arm is stored, the lock claw 79 is manually removed from the notch portion 81, and the support arm 41a is pulled up between the driving bands by a spring 99 which urges the support arm 41a upward.

The embodiment shown in FIGS. 13 and 14 (detailed view of FIG. 13) uses the wheels 8 at both ends of the frame 82 as load supporting means.
3 is rotatably supported, and the lower surface of the conveyor 50 on which the belt 84 is wound between the two wheels is connected to the ground surface of the conveyor 60a or 1.
Float about 0 mm and attach to slide frame 66a. In addition, a driving band 86 is used to drive the slide frame 66a.
Is fixed above the conveyor frame 61a, and is hung on a pulley 85 provided on the slide frame 66a. The other end of the drive belt 86 is fixed to a take-up drum 87 provided above the conveyor frame 66a, and the take-up drum 87 is driven by a motor with a non-reversible speed reducer (not shown).

The embodiment of FIG. 15 shows a cross section of FIG. 16 in which a running tire 97 is fixed to a driving wheel 24a close to a driving band 71a. FIG. 16 shows a state in which the slide frame 66 is raised, the rear part of the vehicle body 10 a of the flat-land vehicle is lifted by the conveyor 60 with respect to a steep slope, and the vehicle is run by the running tires 97.

FIG. 17 shows a state in which the rear portion of the vehicle body 10a of the flat-land vehicle is lifted by the conveyor 60 so that it is easy to get on and off the flat-land vehicle.

The embodiment shown in FIG. 18 shows the swing frame 2b having two rear wheel shaft holes 11, and shows a state where the rear wheel 3 is removed.

In the embodiment shown in FIG. 19, the upper part of the rear wheel arm 12 is rotatably supported on the rotation fulcrum 14 in the front-rear direction of the swing frame 2c, and the rear wheel shaft is fixed to the lower end of the rear wheel arm 12. The rear stopper that regulates the swing range of the rear wheel arm 12 is a hinge pin of the fulcrum 7, and the front stopper stops the pin 13 provided by extending the rear wheel arm 12 upward against the swing frame 2c. .

[0042]

Since the present invention is configured as described above, it has the following effects.

A staircase running function is incorporated in a flat-land vehicle that conforms to a wheelchair, and is always mounted, so that it can be easily used indoors or outdoors on steps or steep slopes on ordinary roads. The range of action expands.

At the time of running on stairs, the rear wheel of a flat-land vehicle is released from the slope of the stairs, the center of gravity is lowered, and the vehicle smoothly runs on a conveyor with a long load supporting range in a rearwardly inclined posture, so that safety is high.
A staircase detection lever with a detection section longer than one pitch of the stairs is used, and the vehicle runs on a conveyor, so that it can be widely used for various stairs and steps.

When traveling on a steep hill, the rear wheels can be lifted by a conveyor and can be run with running tires. There is no vibration due to unevenness of the outer surface of the drive belt, so that the riding comfort can be improved and the steep hill can be driven by power, so that the caregiver's labor can be reduced. Also, when getting on and off the flat-land vehicle, lift the rear part of the flat-land vehicle to make it easier for the cared person to stand up and sit down,
In addition, it is possible to get on and off safely by preventing the seat from being displaced.

A single transport vehicle can easily cope with traveling on flat terrain and on stairs, and there is no need to transfer a cared person or carry a wheelchair on a stair traveling vehicle, and there is little labor to carry and store.
When traveling on stairs, the conveyor supports the load in a wide range with respect to the center of gravity.Therefore, the caregiver does not need to support the carrier, and can walk forward from below the carrier when ascending and from above when descending. Can be reduced.

In the case of a one-box car, getting on and off the car can be carried out using the stair climbing function with a person on board, and the transfer of the cared person and the storage of the transport vehicle are facilitated. In addition, since the connection / separation between the flat-land traveling vehicle and the conveyor unit is made one-touch, it is convenient for use when separated and for carrying.

The slip belt is used for the sliding parts on the driving band and the frame side to reduce frictional resistance, to reduce the capacity of the drive system and the battery, and to manually and easily swing the swinging frame to make it simple and lightweight. Can be made lighter and smaller, cheaper and easier to handle.

[Brief description of the drawings]

FIG. 1 is a side view of a transportable vehicle capable of traveling on stairs.

FIG. 2 is a cross section AA of FIG.

FIG. 3 is a cross section BB of FIG. 2;

FIG. 4 is a side view of a transportable vehicle capable of traveling on stairs.

FIG. 5 is a side view (partial cross section) of a transportable vehicle that can run on stairs.

FIG. 6 is a side view of a transportable vehicle capable of traveling on stairs.

FIG. 7 is a side view of a transportable vehicle capable of traveling on stairs.

FIG. 8 is a side view of a transportable vehicle capable of traveling on stairs.

FIG. 9 is a sectional view of a toothed belt winding portion of the traveling conveyor.

FIG. 10 is a sectional view taken along line EE of FIG. 9;

FIG. 11 is a side sectional view of a transportable vehicle that can run on stairs.

FIG. 12 is a sectional view taken along line FF of FIG. 11;

FIG. 13 is a side sectional view of a transportable vehicle capable of traveling on stairs.

FIG. 14 shows details of a portion G in FIG.

FIG. 15 is a sectional view taken along line H in FIG. 16;

FIG. 16 is a side cross-sectional view of a strollable transport vehicle traveling on a steep slope.

FIG. 17 is a front cross-sectional side view of a stair-movable transport vehicle.

FIG. 18 is a side view of a rear wheel mounting portion of a transport vehicle capable of traveling on stairs.

FIG. 19 is a side view of a rear wheel mounting portion of a transport vehicle capable of traveling on stairs.

[Explanation of symbols]

DESCRIPTION OF REFERENCE NUMERALS 1 stairs 1a Conveyor grounding surface 2, 2a, 2b, 2c, swing frame 3, 3a rear wheel 4, 14 rotation fulcrum 5, 54 drive unit 7, 8, 29, 39 drive fulcrum 10, 10a body 11 rear wheel axle mounting hole 12 Rear wheel arm 20, 20a, 20b Main conveyor 21, 21a, 21b, 31, 31a Conveyor frame 23, 23a Drive shaft 24, 24a Drive wheel 30, 30a Auxiliary conveyor 40, 40a Support means 41, 41a Support arm 51, 79 Lock claws 52, 53 U-shaped groove 60, 60a Conveyor 61, 61a Conveyor frame 62, 63 Guide rail 66, 66a Slide frame 68 Ball screw shaft 71, 71a Toothed belt 73, 73a Slip belt 76 Load support rod 83 Wheel 85 Pulley 86 Drive belt 87 Rewind Ram 91, 96 Detection lever 97 Running tire

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) B62B 3/02 B62B 3/00 B

Claims (20)

[Claims] A drive shaft (23) driven by a motor is pivotally supported at one end of a conveyor frame (21, 21a), and drive wheels are fixed to the left and right sides of the drive shaft.
Drive wheels are disposed on the left and right sides of the other end of the main conveyor (20, 20a). The main conveyor (20, 20a) has a drive belt wound around both wheels. The support means (40) for the conveyor that protrudes and retracts on the ground side and the drive shaft (23) are used as rotation fulcrums, and the main conveyor (20, 20) is used.
A traveling conveyor is constituted by an auxiliary conveyor (30, 30a) which can be swung by an angle adjusting means with respect to a), a rear portion of a seat surface of a vehicle body (10) corresponding to a wheelchair is used as a rotation fulcrum, and the body ( 10) An oscillating frame (2, 2a) capable of adjusting the angle is provided, and an outer periphery of a rear wheel (3, 3a) having an axle fixed below a rotation fulcrum of the oscillating frame (2, 2a) is provided on a conveyor ground contact surface. Swinging frame (2,
2a) and a main conveyor (20, 20a) fixed to the staircase-movable carrier. 2. An upwardly facing U is provided at a lower portion of the swing frame (2a).
A locking claw (5) of a connecting pin urged in the locking direction by a spring with a laterally U-shaped groove (53) at the upper part.
The transport vehicle capable of running on stairs according to claim 1, wherein 1) is provided, and connecting pins corresponding to the U-shaped grooves are fixed above and below the conveyor frame (21a). 3. A drive shaft (23a) driven by a motor is rotatably supported at one end of the conveyor frame (61, 61a), and drive wheels are fixed to the left and right sides of the drive shaft (23a). A conveyor (6) in which driven wheels are disposed at the left and right ends of the other ends of the first and second driving wheels 61 and 61a and drive belts are wound around both left and right wheels.
0, 60a), a slide frame (66, 66a) movable on the conveyor frame in a conveyor traveling direction by a guide mechanism and a driving means, and the slide frame (66, 6a).
6a), a load supporting means (90) extending in a stair rising direction is fixed to the flat-land traveling vehicle connecting portion and the conveyor grounding surface, and the slide frame (66, 66a) is connected to the conveyor grounding surface side from the drive belt to the grounding surface side. Conveyor support means (40a) capable of appearing and retracting and being able to hold its position is provided to constitute a traveling conveyor section, and the rear portion of the seat surface of the flat-land traveling vehicle is used as a rotation fulcrum. Adjustable swing frames (2a, 2b, 2c) are provided, and the axle is fixed below the rotation fulcrum of the swing frames (2a, 2b, 2c). A moving vehicle capable of running on stairs, wherein a moving frame (2a, 2b, 2c) and the slide frame (66, 66a) are connected. 4. A stair-movable transport vehicle according to claim 3, wherein the load support means (90) has a load support rod (76) in which a sliding plate is attached to a bar whose tip is bent upward in a ski shape. . 5. A conveyor (5) in which free wheels are provided at both ends of a frame in a load supporting means (90) and a belt is wound between the two wheels.
The transportable vehicle according to claim 3, wherein 0) is satisfied. 6. A guide mechanism having a four-way guide function on one side of the upper surface of the conveyor frame (61, 61a) for guiding the slide frame (66, 66a), and the other guide mechanism is vertically movable with respect to the conveyor ground plane. The staircase-carriageable vehicle according to any one of claims 3 to 5, wherein the guide is a guide that restricts only the direction. 7. A ball screw shaft (68) is driven by a motor with a speed reducer to drive the slide frame (66), and the upper end side of the ball screw shaft (68) is rotatably and axially supported by the conveyor frame (61). The ball screw nut is supported by the slide frame (66).
A transport vehicle that can run on the stairs described. 8. One end of a drive band (86) is fixed above the conveyor frame (61a) for driving the slide frame (66a), and is hung on a pulley (85) provided on the slide frame (66a). 86) is provided above the conveyor frame (61a).
Item 7. The transport vehicle capable of running stairs according to items 3 to 6, wherein the vehicle is wound up and rewinded in 7). 9. An upward or downward U-shaped groove is provided at a lower portion of the swing frame (2a, 2b, 2c) for connection between the swing frame (2a, 2b, 2c) and the slide frame (66, 66a). Are provided with a locking pin of a connecting pin urged in a locking direction by a lateral U-shaped groove and a spring, and a connecting pin corresponding to the U-shaped groove is fixed above and below a slide frame (66, 66a). 8. The transportable vehicle according to 8 above, which can be run on stairs. 10. A drive belt (71a) provided on a drive wheel (24a).
The running tire ((97)) having an outer diameter corresponding to the outer diameter of the driving band on which the driving wheel (24a) is wound is disposed close to the driving band (24a).
The transportable vehicle according to any one of claims 3 to 9, which is fixed to the vehicle. 11. The swing frame (2b) has two rear wheel axle mounting holes laterally.
11. A transportable vehicle that can run on stairs according to any of claims 10 to 10. 12. An oscillating frame (2c) is provided with a rotational fulcrum (14) in the front-rear direction, rotatably supporting an upper end of a rear wheel arm (12), and a rear wheel axle at a lower end of the rear wheel arm (12). 11. The transport vehicle capable of running on stairs according to claim 1, wherein a swinging range of the rear wheel arm is regulated by a stopper. 13. When getting on or off a flat-land vehicle, the slide frames (66, 66a) can be slid upward to ground the drive wheel side of the conveyor, and the rear part of the flat-land vehicle can be lifted to be in a forwardly inclined posture. The transport vehicle capable of running on stairs according to claim 3 to 12. 14. When traveling on a steep hill, a flat-land vehicle is directed upward, a slide frame (66, 66a) is slid upward, a rear wheel is lifted on a drive wheel side of the conveyor, and a drive shaft is driven to drive a running tire ( The staircase-movable transport vehicle according to any one of claims 3 to 13, wherein the transport vehicle is capable of traveling in (97). 15. The support means (40, 40a) is protruded, and the conveyor is tilted rearward so as to be movable by left and right rear wheels (3, 3a) and a small wheel (42) of a support arm. A stroller that can run on stairs. 16. A traveling drive motor (3) is mounted on a rear wheel (3a).
A staircase-carrying vehicle according to any one of claims 1 to 15, wherein b) is incorporated. 17. The vehicle body (10, 10a) and the swing frame (2a, 2b, 2c) are manually swung, and a telescopic rod with a brake (5a) is used to hold the swing position. 17. The transport vehicle capable of running on stairs according to claim 1, wherein a balancer using a compression spring or a gas spring is provided between (2a, 2b, 2c). 18. The driving belt toothed belt (71, 71).
A sliding plate (7) is provided on the sliding portion between the inner surface of a) and the conveyor frame.
2, 72a) is fixed to the conveyor frame, and the film-shaped slip belts (73, 73a) can be circulated between the toothed belts (71, 71a) and the sliding portions of the sliding plates (72, 72a). The transport vehicle capable of running on stairs according to claim 1. 19. The step detecting means for detecting the top of the stairs,
A detection lever (991, 9) having a detection portion longer than the pitch
The transport vehicle capable of running on stairs according to any one of claims 1 to 18, wherein 6) is used. 20. The transport capable of running on stairs according to claim 3 to 19, having a speed range in which the running speed of the stair running conveyor (60, 60a) can run at substantially the same speed as the moving speed of the slide frame (66, 66a). car.