JPH07204226A - Motor-driven wheelchair and ramp - Google Patents

Abstract

PURPOSE:To enable a motor-driven wheelchair whose cart portion is provided with a front wheel portion, a rear wheel portion, a seat portion and a driving portion to easily pass a step difference and level difference such as those between the road and a park by providing a driving shaft with pinions. CONSTITUTION:A wheelchair 1 has a front-wheel portion 5 attached to the front 4 of a cart portion 3 by tilting the front 4 upward, a rear-wheel portion 7 mounted at the rear 6, and a seat portion 9 provided above the middle 8 of the cart portion. A driving wheel 25 mounted on the motor shaft 24 of a motor 23 is engaged with the driven wheel 26 of a driving shaft 21 at rear wheels 22, 22a so that the rear wheels 22, 22a are driven by the motor, and a pair or pinions 27, 27a are attached to the driving shaft 21 inside the driven wheel 26, and wheels 28 at the lower ends of the pinions are tilted inwards. A seat 40 is mounted on the front support 41 and the rear mount 42 of the cart portion 3 via a hinge plate and a hinge shaft in such a way as to freely rock, and a bearing is provided at the end of the rod of a hydraulic cylinder and the hinge shaft is passed through the bearing, and the hydraulic cylinder is connected to the seat 40 so that the seat freely rocks.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a doorway of a park, an entrance / exit of a building such as a government office, a public office, and other steps and stairs that are obstructed, sick, or aged. The present invention relates to an electric wheelchair and a hoisting orbit that allow a weak person to go up and down using a wheelchair.

[0002]

2. Description of the Related Art Conventionally, there is a stairway from a road, an entrance to a park on a highland or a little lowland, or a government office,
In government offices, there are many stairs and steps between roads, car parks, between the building in front of the government building and the building, or at the entrance to the building, or other public or generally available places or buildings. There are innumerable stairs and steps inside the connecting passage, itself, and at the entrances and exits.

In addition to the above, when escaping up and down stairs, socially vulnerable people who have difficulty walking on their own and use self-help devices need care, but due to delays in welfare policies, socially vulnerable people Since it is not possible to move up and down stairs, etc. and it is difficult to use various facilities or go out on a daily basis, slopes have come to be installed on large stairs, but it costs a lot of money, man-hours, and man-hours to install it. Due to the number of days required, the installation location was limited.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides an electric wheelchair for a user of an electric wheelchair which is difficult to walk by himself or herself, so that a step or height difference between a road and a park can be easily raised or lowered. And to provide a hoisting orbit.

[0005]

SUMMARY OF THE INVENTION The present invention is part of a stairway section in view of the problem that it is difficult for vulnerable people to use various facilities based on the above-mentioned prior art because of insufficient elevator facilities such as slopes. A hoisting track with a rack is laid on the floor, and a hoistway between high and low places that does not require the renovation of the stairs itself or large civil engineering work is provided, and a pinion that engages with the rack of the hoisting track is attached to the wheel of the electric wheelchair. By engaging the wheelchair pinion on the rack of the hoisting track,
The wheelchair is floated by such engagement, and the driving force of the electric motor is used to ascend and descend the stairs by using the ascending and descending tracks to solve the above problems.

Further, by providing the above-described lifting facility and the electric wheelchair capable of raising and lowering, it is easy for people who need nursing care to use the facility having a height difference, and it is difficult for them to walk on their own. People who can go out can easily go out and contribute to the development of a welfare society.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is an electric wheelchair according to the present invention. The wheelchair 1 runs not only on a flat ground but also on an inclined slope and a hoistway 2 described later. , Go up and down.

Reference numeral 3 denotes a carriage portion of the wheelchair 1, and the carriage portion 3
The front part 4 of the vehicle is mounted with the front wheel part 5 slightly inclined, the rear wheel part 7 is mounted on the rear part 6 of the bogie part 3, and the middle part of the bogie part 3 between the front wheel part 5 and the rear wheel part 7 is mounted. A seat portion 9 is provided above the portion 8 to form a wheelchair 1 of a basic form.

Reference numeral 10 designates a bearing for a vertical shaft provided on the upper part of the front part 4 of the bogie part 3. The lower end of the transmission shaft 11 rotatably mounted on the bearing 10 is a pair of support plates on the lower surface of the front part 4. 12, 12
While mounting a, a front wheel 14 is rotatably attached to the lower ends of the support plates 12 and 12a via a rotary shaft 13, and a circular wheel is attached to the upper end of the transmission shaft 11 via a shaft 15 and a proximal shaft 16. Handle 17
Is provided.

Reference numeral 18 denotes an inclined frame 19 on the upper portion of the rear portion 6 of the carriage 3.
A horizontal pedestal provided via the 19a, the horizontal pedestal 18, the inclined frames 19, 19a, and the drive unit 20 near the rear portion 6 of the trolley unit 3.
The drive shaft 21 is rotatably arranged on the rear extension line of the rear portion 6 of the carriage unit 3, and a pair of rear wheels 22, 22a are attached to both ends of the drive shaft 21.

Reference numeral 23 denotes a motor provided below the horizontal pedestal 18, and a drive gear attached to a motor shaft 24 of the motor 23.
25 is a driven gear that is attached to the drive shaft 21 in addition to the rear wheels 22, 22a.
The rear wheels 22 and 22a are electrically driven by engaging with a pair of pinions 27 and 27 on the drive shaft 21 inside the driven gear 26.
a is attached, and the lower end tooth surfaces 28 of the pinions 27, 27a are inclined inward.

A rechargeable battery 29 is arranged in front of the motor 23 and on the rear portion 6 of the carriage 3.

Further, a pair of first guide wheels 31, 31a, which are horizontally rotatable and disc-shaped, are attached to central portions of the lower surfaces of the rear portion 6 and the intermediate portion 8 of the carriage portion 3 via mounting shafts 30, 30a. With
At the intermediate portion in the front-rear direction of the pair of first guide wheels 31, 31a,
Holding plates 32 and 32a are suspended and fixed on both outer side surfaces of the lower surface of the trolley unit 3, and a horizontal mounting shaft 3 is provided inside the holding plates 32 and 32a.
A pair of second guide wheels 34, 34a are rotatably attached via 3, 33a.

Reference numeral 40 denotes a seat installed on the intermediate portion 8 of the trolley portion 3 and the horizontal pedestal 18, and includes a retractable front support portion 41 swingably provided on the upper surface of the intermediate portion 8 of the trolley portion 3 and a horizontal pedestal. The seat 40 is attached to the rear mounting seat 42, which is a rear support fixed on the seat 18.
Hinge plates 43, 43a and hinge shafts 44, 44a provided on the lower surface of the
The seat 40 is swingably attached to the upper portion of the trolley portion 3 via the.

The front support portion 41 comprises a hydraulic cylinder 46 having a hydro pump 45 as a main member, and a lower end of the hydraulic cylinder 46 is a hinge plate 47 provided at an intermediate portion 8 of the carriage 3.
Is mounted swingably via a hinge shaft 48, and a bearing 50 is provided at the tip of a rod 49 of the hydraulic cylinder 46 to support the hinge shafts 44, 44a of the hinge plates 43, 43a provided on the lower surface of the seat 40.
Insert into 50, hydraulic cylinder 46 of front support 41 and seat
40 is swingably connected.

The hydro pump 45 mounted on the hydraulic cylinder 46 has a weight for when the seat 40 is tilted, which is a force acting on the hydraulic cylinder 46 when the carriage 3 is tilted, or a built-in leveling sensing member. So, trolley part 3, seat 4
The rod 49 of the hydraulic cylinder 46 is automatically expanded and contracted by sensing the inclination of 0, the hydro pump 45, and the hydraulic cylinder 46.

Next, the elevating track 2 on which the above-mentioned electric wheelchair 1 travels will be described. 60 is an existing stairway portion installed in various facilities, and the stairway portion 60 is a lowland portion 61.
And the highland part 62 are connected to each other, and a stepped part 63 at a predetermined portion of the staircase part 60,
63a ... The footrests 64, 64a are provided on the track portion 65 to form the foot portion.
It is erected above 63, 63a.

Reference numeral 66 is an upper opening and an inverted gate type main track in the track part 65, and the main track 66 is composed of a bottom part 67 and both side wall parts 68, 68a, and a groove is formed in the pair of side wall parts 68, 68a. -Shaped guide space 69 is formed, and the bottom portion 67 of the main track 66 is provided on the stairs 60.
It is fixed at 0, 70a, etc.

Reference numerals 71 and 71a are side wall portions 68 and 68a of the main track 66.
It is a projecting portion provided on the upper outer side surface, and racks 72, 72a are provided on the upper outer side surface of the projecting portion 71, 71a, and the projecting portion 7
Guide rails 73, 73a are formed on the lower surface of 1, 71a.

The racks 72 and 72a and the guide rails 73 and 73a
Both of them are provided above and below the projecting portions 71, 71a, but such installation means may be provided separately, and the upper end tooth surfaces 74 of the racks 72, 72a are horizontal and provided at the upper ends of the side wall portions 68, 68a. Further, the pinions 27, 27a of the wheelchair 1 or the second guide wheels 34, 34a which engage with the racks 72, 72a or the guide rails 73, 73a can also be changed in shape corresponding to the above.

In 75 and 75a, the track portion 65 has a lowland portion 61 and a highland portion.
It is a grounding part connected to 62, and footrests 64, 64a are provided for the ground 76 of the lowland part 61 and the highland part 62, and the base point and the end point partial section of the main track 66 are horizontally laid parts 77, 77a. Is made.

Reference numerals 78, 78a ... Are a pair of guide embankment portions provided on the ground 76 at the base point and the end point side of the hoisting track 2.
78, 78a ... are arranged on both outer extensions of the main track 66 at intervals corresponding to the widths of the rear wheels 22, 22a of the wheelchair 1, and on the side of elevation with respect to the ground 76, a sloped surface 79, 79a has rear wheels 22 when the wheelchair 1 travels on the hoistway 2.
22a is set to float.

The operation of the electric wheelchair and the hoisting orbit according to the present invention will be described below. In a normal state where the front wheels 14 and the rear wheels 22 and 22a of the wheelchair 1 are grounded on the ground 76, the lowland portion 61 is used.
When the vehicle reaches the stairs 60 where the elevating track 2 is laid, the front wheels 14 continue to travel toward the guide space 69 of the main track 66, and the front wheels 14 ride on the bottom 67 of the guide space 69. Start lifting.

Next, after the rear wheels 22, 22a of the wheelchair 1 ride on the guide embankment portions 78, 78a, ..., the pinions 27, 27a of the drive shaft 21 provided on the wheelchair 1 are continuously mounted on the rack 72 of the main track 66. 72
When riding on a, pinions 27, 27a and racks 72, 72a mesh, the wheelchair 1 ascends on the hoisting track 2 and the rear wheels 22, 22a float up, and when reaching the highland 62, the reverse order to the above Touch the ground 76 at and return to normal running.

Incidentally, the description of the operation is omitted because it is the reverse of the ascent when descending, and in the hoisting track 2, the front wheels 14 of the wheelchair 1 travel on the bottom 67 of the main track 66.
It can also be used to carry bicycles.

When the wheelchair 1 travels up and down the track 2, the first guide wheels 31, 31a provided on the lower surface of the wheelchair 1 are in the guide space 69, and the second guide wheels 34, 34a are the guide rails 73, 73a. Hold the wheelchairs 1 in the grounded state and hold the hydro pump
Even if the wheelchair 1 is in various inclined states by the 45, the seat 40 is always kept horizontal.

[0027]

In summary, according to the present invention, in the electric wheelchair 1 in which the bogie part 3 is provided with the front wheel part 5, the rear wheel part 7, the seat part 9 and the drive part 20, the drive shaft 21 is provided with the pinions 27 and 27a. Therefore, in normal flatland traveling, the passenger sits in the seat portion 9 and runs with the front wheel portion 5 and the rear wheel portion 7 grounded on the ground 76,
Also, in the staircase part 60 that connects the lowland part 61 and the highland part 62,
By moving the racks 72, 72a of the ascending / descending track 2 installed on the stairs 60 by engaging the pinions 27, 27a with each other, the wheelchair 1 moves up and down between high and lowlands, and people who have difficulty walking on their own wheelchair 1 It is possible to expand the range of activities by getting on the car and to use various facilities. Also, in manufacturing such a wheelchair 1, it is relatively inexpensive to manufacture because the pinion 27, 27a is only provided in the conventional wheelchair 1. Can be done.

Further, the front portion of the seat portion 9 is pivotally attached to the front support portion 41, and the rear portion of the seat portion 9 is pivotally attached to the rear mounting seat 42 so as to be swingably attached to the carriage portion 3. Since the part 41 is composed of the hydraulic cylinder 46 equipped with the hydro pump 45 which automatically expands and contracts according to the inclination degree of the bogie part 3, when the wheelchair 1 travels on the ascending and descending track 2, during its ascending and descending, or normally. When the vehicle 3 is traveling on the inclined road, the seat 40 is always kept horizontal by the expansion and contraction of the hydraulic cylinder 46 even if the trolley part 3 is inclined, and the user of the wheelchair 1 does not change its posture and does not fall down stably. , It is possible to lift up and down the hoisting track 2.

Further, a track portion 65 is installed on the lowland portion 61, the staircase portion 60 and the highland portion 62, and racks 72 and 72a are provided on the track portion 65,
Since the track portion 65 is erected on the staircase portion 60 via the footrests 64, 64a, ..., the staircase portion 60 is abolished with respect to the staircase portion 60 installed between the lowland portion 61 and the highland portion 62. It does not require large-scale construction, and is lowland 61, stairs 60 and highland 62.
It is possible to easily install the hoisting and lowering track 2 required for care by simply installing the hoisting and lowering track 2 in the car, and it is also useful for the maintenance of social capital.

Further, in the ground contact portions 75, 75a for the lowland portion 61 and the highland portion 62 of the ascending / descending track 2, since the guide embankment portions 78, 78a are provided on both side extensions of the track portion 65, they are installed on the ground 76. The rear wheel portion 7 of the wheelchair 1 in order for the wheelchair 1 to travel on the elevating track 2 only by constructing the guide embankment portions 78, 78a, ...
And the pinion 27 for the rack 72, 72a,
Wheelchair 1 is used as a guide embankment to facilitate engagement of 27a.
78, 78a ... It is possible to easily set the engagement relationship between the hoisting track 2 and the wheelchair 1 only by traveling on the vehicle for a short time.

Further, the wheelchair 1 of claim 1 or 2 and the wheelchair of claim 3
Or when engaging the hoisting orbit 2 of 4, the pinions 27, 27a
Together with the racks 72 and 72a, the front wheels 14 travel on the bottom 67 of the hoisting track 2, the first guide wheels 31 and 31a are provided on the lower surface of the wheelchair 1, and the hoisting track 2 is formed in an inverted gate shape. To provide a guide space 69, and the first space of the wheelchair 1 is provided in the guide space 69.
Since the guide wheels 31 and 31a can be fitted freely, the first guide wheels 31 and 31a should fit into the guide space 69 after the wheelchair 1 is placed on the hoisting track 2 by the operation of the handle 17 and the ascent and descent is started. As a result, the wheelchair 1 does not derail from the hoistway 2,
Stable lifting and lowering can be performed.

Since the guide rails 73, 73a are provided on the side walls 68, 68a of the ascending / descending track 2 and the second guide wheels 34, 34a engaging with the lower surfaces of the guide rails 73, 73a are provided on the wheelchair 1. When the wheelchair 1 moves up and down on the hoisting track 2, since the hoisting track 2 is inclined, even if the seat 40 is held horizontally by the operation of the front support part 41, the wheelchair part 3 of the wheelchair 1
Is inclined along the ascending / descending track 2 and even if the center of gravity is eccentric toward the lowland part 61, the second guide wheels 34, 34a of the wheelchair 1 are brought into contact with the lower surfaces of the side walls 68, 68a of the ascending / descending track 2. ,
It is possible to prevent the wheelchair 1 from tipping down in the direction of the lowland 61, which is a great practical effect.

[Brief description of drawings]

FIG. 1 is a side view of a wheelchair according to the present invention.

FIG. 2 is a bottom view of the main part of FIG.

FIG. 3 is a rear view of the main part of FIG.

FIG. 4 is an enlarged side view of a main part of a seat portion of a wheelchair.

FIG. 5 is a rear view of FIG.

FIG. 6 is a side view of a lowland portion and a wheelchair on an ascending / descending track.

FIG. 7 is a side view in which a part of a lifting orbit is omitted.

FIG. 8 is a rear view of the main part showing the engaged state of the wheelchair and the lifting track.

[Explanation of symbols]

 1 wheelchair 3 bogie part 5 front wheel part 7 rear wheel part 9 seat part 14 front wheel 20 drive part 21 drive shaft 27, 27a pinion 31, 31a first guide wheel 34, 34a second guide wheel 41 front support part 42 rear mounting seat 45 Hydro pump 46 Hydraulic cylinder 60 Stepped portion 61 Lowland 62 Highland 64, 64a ... Footrest 65 Track 66 Main track 68, 68a Side wall 69 Guide space 72, 72a Rack 73, 73a Guide rail 75, 75a Ground 78, 78a… Guide embankment

Claims (6)

[Claims] 1. An electric wheelchair provided with a front wheel portion, a rear wheel portion, a seat portion and a drive portion in a trolley portion, wherein a drive shaft is provided with a pinion. 2. A front support portion pivotally attached to a front support portion of a seat portion, and a rear portion of the seat portion to a rear mounting seat, and a front support portion swingably attached to a carriage portion. 2. The electric wheelchair according to claim 1, wherein the hydraulic cylinder is equipped with a hydro pump that automatically expands and contracts according to the degree of inclination. 3. An elevating and lowering device, characterized in that track parts are installed in lowland parts, staircase parts and highland parts, racks are provided on the track parts, and the track parts are erected in a floating state on the staircase parts via a foot stand. Orbit. 4. The hoisting orbiting track according to claim 3, wherein guide embankment portions are provided on both side extensions of the track section at the ground contact portions for the lowland and highland areas of the hoistway orbit. 5. The wheelchair according to claim 1 or 2 and the ascending / descending track engagement according to claim 3 or 4, wherein the pinion is meshed with the rack, and the front wheels are run on the bottom of the ascending / descending track so that the lower surface of the wheelchair is secured to the lower surface of the wheelchair. (1) An electric wheelchair and a lifting wheel characterized in that a first guide wheel of a wheelchair can be fitted in the guide space by providing a guide space with an up-and-down trajectory formed in an inverted gate shape. Combination structure of tracks. 6. An electric wheelchair and a hoisting track according to claim 5, wherein a guide rail is provided on a side wall of the hoisting track, and a second guide wheel engaging with a lower surface of the guide track is provided on the wheelchair. Combination structure of.