JPH0872758A - Wagon ascending and descending staircase - Google Patents

Abstract

PURPOSE: To safely and easily travel on staircases by providing a tandem wheel mechanism with traveling wheels supported on crawler devices and also caster wheels for freely ascending and descending a staircase, in a wagon for ascending and descending the staircase, having a pair of left and right crawler devices. CONSTITUTION: In a wagon 1 ascending and descending a staircase for carrying garbage, etc., ascending and descending a staircase S, when it ascends and descends the staircase S, a motor-driven cylinder 21 is extended so as to move a caster 19 upward from the contact surface of a belt crawler 13 also the front and rear wheels 17 and 18 of a tandem wheel mechanism 14 are alternately brought into contact with the corner of the staircase S. In this state, a belt scrawler 13 is driven by a drive motor and the wagon is forced to ascend and descend the staircase S. On the other hand, when the wagon is run on a flat ground, a car body frame 2 and a load carrying platform 4 are moved downward in their inclined postures by shrinking the motor-driven cylinder 21, and also the caster wheel 19 is protruded downward and grounded and the wagon is traveled by means of power input via the wheels 17 and 18 and the caster wheel 19 of the tandem wheel mechanism 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stair lift transport vehicle used for elevating stairs to collect and transport trash in, for example, railway station buildings on multi-storey floors, public and private buildings and the like.

[0002]

2. Description of the Related Art Conventionally, a horizontal ground portion is at least 2 of stairs.
A crawler device in which a crawler having a length that extends over more than one step is wound, a vehicle body that can drive the crawler device by a drive motor to move up and down stairs, and the crawler device projects downward from the grounding surface to ground. A stair climbing carrier having traveling wheels that travel on a flat ground without grounding a crawler device, a steering handle attached to one front and rear end of the vehicle body, and a loading platform provided on the vehicle body is disclosed in the present application. It is proposed by a person, for example, in Japanese Examined Patent Publication No. 1-38034. In this stair lift carrier, the crawler device is provided with an inclined portion on the control handle side that comes into contact with the first corner and goes up the stairs when the crawler climbs the stairs, and a boundary portion between the inclined portion and the horizontal grounding portion. The caster wheel is provided so that it can be selected between a position where the caster wheel projects below the grounding surface of the crawler device and touches the ground, and a position where the caster wheel moves above the grounding surface of the crawler device and does not touch the ground. The tandem wheel mechanism in which the traveling wheels are pivotally supported is provided at both ends of a wheel support plate whose intermediate portion is pivotally supported so as to be rotatable back and forth.

[0003]

In the above conventional stair climbing carrier, when the carrier finishes climbing up and down the stairs and reaches a flat ground and travels while pushing by hand, first the caster wheels are brought into contact with the ground contact surface of the crawler device. It is projected downward and grounded so that it can travel with the tandem wheels.
For this reason, for example, when changing the direction of the carrier at the stairs and the landing in the middle of the stairs and moving up and down the next stair, there is a problem that the caster wheels have to be taken in and out one by one. In addition, the center of gravity of the loading platform is high, and the movement of the center of gravity of the load becomes large when the stairs are moved up and down, resulting in unstable traveling and poor visibility in the forward direction, making it difficult to steer. Furthermore, when the above-mentioned conventional stair climbing carrier is used for collecting and transporting garbage in a railway station building, there is no problem in climbing the stairs, but when traveling on the platform, especially when traveling on stairs or stations. When driving in a place where the platform is narrow due to offices, etc., there is a risk of accidentally falling onto the track. In addition, when traveling near the down stairs, there is a risk that the train will derail and fall down the stairs. In this case, the train will be stopped or a large number of passengers and passengers will be inconvenienced.

The present invention has been devised in order to solve such problems, and it is a stairway that can safely and easily collect and transport garbage in railway station buildings on multi-storey floors, public and private buildings, etc. The purpose is to provide a lift truck.

[0005]

In order to achieve the above-mentioned object, the present invention provides a pair of left and right crawler devices having a horizontal grounding portion wound around at least two steps of stairs and wound around them. A vehicle body in which a crawler device is driven by a drive motor so that the stairs can be moved up and down; traveling wheels that protrude below a grounding surface of the crawler device to ground, and travel on a flat ground without grounding the crawler device; In a stair climbing carrier comprising a steering handle attached to one front and rear end of the vehicle and a loading platform provided on the vehicle body, the crawler device contacts the first corner when climbing the stairs, and The steering wheel has an inclined part that rises up to the side, and the traveling wheels are axially supported at both ends of a wheel support plate that is pivotally supported in the middle part at the boundary between the inclined part and the horizontal ground contact part. Tandem A wheel mechanism is provided, a cylinder device for tilting the vehicle body up and down with respect to the crawler device is provided between the crawler device and the vehicle body, and a caster wheel is attached to the lower surface of the vehicle body on the side opposite to the steering handle. Is tilted up and down with the steering wheel side as a fulcrum, and the position where the caster wheel projects below the ground surface of the crawler device and touches the ground, and the position where the caster wheel moves above the ground surface of the crawler device and does not touch the ground are selected. It is characterized by being able to do so.

Further, it is characterized in that a brake lever for applying a brake to a traveling wheel of the tandem wheel mechanism or for releasing the brake is provided at the grip portion of the steering handle.

Further, even if the operator has a steering handle and the vehicle body is tilted so that the caster wheels move above the ground contact surface of the crawler device, the front view is formed by a casing having an opening / closing lid. It has a height that can be secured, and a partition is provided in the casing to prevent the load from moving largely in the front-rear direction.

Furthermore, a pair of left and right crawler devices, around which a horizontal grounding portion has a length that extends over at least two steps of the stairs, and a pair of left and right crawler devices are driven by a drive motor to move up and down the stairs. And a traveling wheel disposed on the rear side of the crawler device,
A cylinder device for tilting the vehicle body up and down with respect to the crawler device is provided between the crawler device and the vehicle body, and when the vehicle body is tilted upward, the crawler device is grounded to move up and down stairs. In a stair lift carrier, a pair of left and right running front wheels are provided on a swing frame at a position on the front side of the vehicle body, and the swing frame is axially supported so as to be vertically swingable with respect to the vehicle body. In the state in which the vehicle body is tilted downward, the traveling front wheel and the traveling wheel are configured to come into contact with each other and travel on a flat ground.

[0009]

With the above structure, when the stair climbing carrier of the present invention moves up and down the stairs, the cylinder device is extended to tilt the vehicle body upward with the steering handle side as a fulcrum.
The stair lift carrier moves up and down the stairs by moving the caster wheel above the ground plane of the crawler device to ground the crawler device and then driving the crawler device. At this time, the loading platform is formed by a casing having an opening / closing lid, and a partition is provided in the casing to prevent the load from largely moving in the front-rear direction. Furthermore, an operator having a steering handle tilts the vehicle body upward. Since the height is such that the forward field of view can be secured even when the stairs are raised, the operator can safely and stably operate the stair climbing carrier.

Next, when the stair climbing carrier travels on a flat ground, when moving on a flat ground such as a landing, the caster wheels are quickly moved by the tandem wheel mechanism without lowering the caster wheels. Further, when moving a long distance on a flat ground, the cylinder device is contracted to tilt the vehicle body downward, the caster wheels are lowered together with the loading platform, and the tandem wheel mechanism is moved. Also, when stopping, the brake can be easily applied when traveling on a flat ground or when stopped by applying a brake to the traveling wheel of the tandem wheel mechanism or providing a brake lever at the grip of the steering handle. To be

When a stair climbing carrier of the type having traveling wheels on the front side of the car body moves up and down the stairs, the car body is tilted upward and the crawler device is grounded, as in the car of the first invention. Then, by driving the crawler device, the carrier moves up and down the stairs. Next, when the transport vehicle travels on a flat ground, the cylinder device is contracted to tilt the vehicle body downward, and the traveling front wheels and the traveling wheels are grounded so that the crawler device is levitated. To drive on a flat ground. Then, when the transport vehicle travels on a narrow traveling surface such as the platform of a station, when the transport vehicle approaches the boundary between the platform and the railroad track, one traveling front wheel provided in front of the transport vehicle travels. Take off from the plane. Also, if you approach the entry point of the down stairs while traveling on the platform,
Similarly to the above, when one of the front running wheels provided in front of the transport vehicle derails from the running surface, the rocking frame supporting the front running wheels swings and floats in the crawler device. Will be grounded on the running surface. Since the crawler device is in the locked state when the drive motor is not driven, the grounding of the crawler device causes the transport vehicle to be forcibly stopped irrespective of the operator's control.

[0012]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a side view of a stair climbing carrier according to a first embodiment of the present invention, and FIG. 2 is a top view. In the figure, reference numeral 1 is a transport vehicle, and this transport vehicle 1 is provided with a crawler device 3 for raising and lowering stairs below a vehicle body frame 2 and a loading platform 4 above the vehicle body frame 2, respectively. A steering handle 5 is provided so that the rear portion of the vehicle body frame 2 extends upward.

The crawler device 3 is provided with a drive motor 8 and a reduction mechanism 9 at the front (left side in FIG. 1) of a pair of left and right orbital frames 7 formed in a warp shape in side view, and at the rear of the orbital frame 7. On the right side of FIG. 1, a drive motor 8 and a battery and an electric component 10 which are power sources of an electric cylinder 21 described later are mounted. A drive wheel 11 is attached to the front end of the track frame 7, and the drive wheel 11 and an idle wheel 12 attached to the rear end of the track frame 7 that is bent in a warp shape.
The belt crawler 13 is wound between and. The belt crawler 13 is arranged to contact the corners of the stairs S in two or more steps and move up and down the stairs S. Further, the belt crawler 13 is made of an elastic material such as synthetic rubber in consideration of the protection and cushioning action of the stairs S and the like during its driving, and the outer peripheral surface of the belt crawler 13 has a trapezoidal cross section suitable for ascending and descending the stairs ( (Not shown) are formed in an array at a predetermined pitch, and a projection row (not shown) that engages with the drive teeth formed on the outer periphery of the drive wheel 11 and the idler wheel 12 is formed on the inner peripheral surface thereof (not shown). The belt crawler 13 is driven.

In addition, the crawler device 3 is in contact with the first corner when climbing the stairs S and rises on the stairs S 13a.
On the side of the steering handle 6 and on the rear side of the crawler device 3,
That is, the tandem wheel mechanism 14 is provided at the boundary between the inclined portion 13a and the horizontal grounding portion 13b. As shown in FIG. 3, the tandem wheel mechanism 14 includes a wheel support plate 1
An intermediate portion of 5 is pivotally supported by a pivot 16 so as to be rotatable forward and backward with respect to the track frame 7, and front and rear wheels 17 and 18 which are traveling wheels are pivotally supported at both ends of the wheel support plate 15. The front wheel 17 and the rear wheel 18 are the wheel support plate 1
When the wheel support plate 15 is in a substantially horizontal state, it projects downward from the belt crawler 13 and runs on the ground, and when the wheel support plate 15 pivotally moves back and forth about the pivot 16, the wheel on the turning side moves. The belt crawler 13 is adapted to enter above the lower surface thereof.

A caster wheel 19 of one wheel is attached to the central portion in the width direction of the lower surface of the vehicle body frame 2 on the side opposite to the control handle 5. Further, the vehicle body frame 2 and the crawler device 3 are pivotally supported by a pivot shaft 20 so as to be vertically tiltable, and an electric cylinder 21 is provided between the vehicle body frame 2 and the track frame 7. The electric cylinder 21 receives electric power from the battery 10 and rotates a motor provided therein in forward and reverse directions to move a cylinder shaft fitted to the motor up and down to extend and contract the electric cylinder. is there. By the expansion and contraction operation of the electric cylinder 21, the pivot 20
With the fulcrum as the fulcrum, the vehicle body frame 2, loading platform 4, and steering handle 5
Etc. can be tilted up and down. Then, when the electric cylinder 21 is contracted, the caster wheel 19 projects downward from the ground contact surface of the belt crawler 13 to travel on the ground, and when the electric cylinder 21 is extended, the caster wheel 19 contacts the belt crawler 13. It moves above the ground so that it does not touch the ground.

The steering handle 5 is provided with grip portions 5a, 5a on both left and right sides, and an operating portion 5b for operating the drive motor 8, the speed reduction mechanism 9, the electric cylinder 21, and the like. Further, a brake lever 22 is provided at a position corresponding to one grip 5a of the steering handle 5 and a brake 25 is applied to the wheels 18 of the tandem wheel mechanism 14 via a brake wire 23. A balance spring 24 is provided on the pivot 16 of the tandem wheel mechanism 14 and normally holds the wheel support plate 15 so as to hold it in a substantially horizontal state. The front wheel 17 and the rear wheel 18 are supported by the belt crawler 13. It is designed to project downward. The brake lever 22 is provided with a lock / unlock claw 22a. Although the brake 25 is applied when the brake lever 22 is gripped in this embodiment,
This is the brake 25 when the brake lever 22 is gripped.
May be opened.

The carrier 4 is formed of a casing,
An opening / closing lid 26 is provided on the upper surface, and left and right side plates 27 are provided.
Can be opened and closed. The casing of the loading platform 4 is
The height is set so that the front view can be secured even when the operator holding the grip portion 5a of the steering handle 5 tilts the body frame 2 and the loading platform 4 upward. Also, the loading platform 4
A partition 28 is provided in the casing so that the load accommodated in the casing does not largely move in the front-rear direction. The partition 28 may be a plate or a net.

The stair lift transport vehicle 1 having such a structure is used, for example, in a railway station building on a multi-storey floor, a public or private building, etc., for work such as going up and down the stairs S to collect and transport dust. When the stair climbing carrier 1 moves up and down the stairs S, the caster wheels 19 are extended by the caster wheels 19 as shown in phantom lines in FIG. 1 and in FIG.
It moves above the ground plane of No. 3 so that it does not touch the ground.
Then, the belt crawler 13 is driven by the drive motor 8 to move up and down the stairs S. When the stair climbing carrier 1 travels on the flat ground GL for a long time, the electric cylinder 21 is contracted to tilt the vehicle body frame 2 and the loading platform 4 downward, as shown by the solid line in FIG. 1 and FIG. And the caster wheel 19 projects downward from the ground contact surface of the belt crawler 13 to contact the ground, and the wheels 17, 18 of the tandem wheel mechanism 14 are grounded.
Along with it, it runs by human power.

When loading the garbage in the garbage bag on the loading platform 4, the opening / closing lid 26 is opened and put in the casing on the front side or the rear side of the partition 28. Further, when removing the dust contained in the loaded dust bag from the loading platform 4, the side plate 27 can be opened to take out a large amount of dust at a time.

When the stair climbing carrier 1 goes up the stairs S, the vehicle body is turned to the rear and the flat ground GL in front of the stairs S is placed.
Alternatively, at the landing of the stairs, the electric cylinder 21 is extended to tilt the vehicle body frame 2, the cargo bed 4, the steering handle 5 and the like toward the steering handle 5 side with the pivot 20 as the fulcrum, and at the same time, the caster wheels 19 are the ground planes of the belt crawler 13. It moves to the upper side and does not touch the ground. Then, the steering handle 5 is on the front side, the operator is facing backward, and the operator holds the grip portion 5a of the steering handle 5 to operate the operation portion 5b.
The belt crawler 13 is driven by the drive motor 8 to climb the stairs S. At the first corner of the stairs S, the inclined portion 13a of the belt crawler 13 is engaged to push up the vehicle body on the stairs S, and the horizontal grounding portion 13b is crossed over two or more steps of the stairs S at each corner. It touches and rises.

When the stair climbing carrier 1 descends the stairs S, the vehicle body is turned forward and the grip 5a of the steering handle 5 is held.
The operator holding the pedestal is in the forward facing state and descends the stairs S from the front end side of the belt crawler 13. At this time, the front view can be secured even when the operator who holds the handle 5a of the steering handle 5 on the platform 4 raises the platform 4 so that the caster wheels 19 move above the ground contact surface of the belt crawler 13. Since it is set to a height, it has a wide forward field of view, which is always good and easy to maneuver.

During such stair climbing, the front wheels 17 and the rear wheels 18 of the tandem wheel mechanism 14 alternately come into contact with the corners of the stairs S to rotate the wheel support plate 15 about the pivot shaft 16 so as to rotate the other wheel. The wheels are positioned above the ground contact surface of the belt crawler 13 so that driving of the belt crawler 13 is not hindered. When a sudden stop of the vehicle body is required, the driving of the drive motor 8 is stopped, and the non-excitation actuation type exciting brake is used to make a sudden stop. Further, since the platform 5 is inclined toward the steering handle 6 side around the pivot 20, the body center of gravity is prevented from moving to the descending side of the stairs S even if only slightly, and the vehicle body maneuverability is improved. Further, since the partition 28 is provided in the casing of the loading platform 5, the load accommodated in the casing does not move largely in the front-rear direction, the center of gravity of the vehicle body is prevented from moving downward, and the vehicle body is controlled. The property is improved.

When the stair climbing carrier 1 travels on the flat ground GL for a long time, the caster wheels 19 are projected below the ground contact surface of the belt crawler 13 and run manually with the wheels 17 and 18 of the tandem wheel mechanism 14. However, when moving the stair climbing carrier 1 on a flat ground GL having a short distance such as a landing of the stairs S, the electric cylinder 21
The belt crawler 13 is rotated around the wheels 17 and 18 of the tandem wheel mechanism 14 by the steering handle 6 while moving the caster wheels 19 up and down the stairs.
Lift it slightly so that the front of
7 and 18 are run to move up and down the next stairs S. Further, when the stair lift transport vehicle 1 needs to be stopped suddenly while traveling on the flat ground GL, the brake lever 22 may be gripped to operate the brake 25. Further, in order to keep the brake lever 22 in the operating state for a long time, the lock / unlock claw 22a may be used.

Next, the stair climbing carrier of the second embodiment is shown in FIG.
This will be described with reference to FIGS. 7, 8, 9, and 10. 6 is a side view of the carrier of the second embodiment, FIG. 7 is a top view, and FIG. 8 is a front view. In the figure, reference numeral 1 is a stair climbing carrier, and this carrier 1 is provided with a crawler device 3 for raising and lowering stairs below a vehicle body frame 2 and a vehicle body frame 2
The loading platform 4 is provided on the upper side of. The same members as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

The vehicle body frame 2 is formed so that its rear portion extends upward, and a steering handle 5 is provided at the rear end portion of the vehicle body frame 2, and the front portion of the vehicle body frame 2 is provided at the front end of the crawler device 3. The body frame 2 is formed to exceed the length.
Front wheels 6 are provided at the tip of the.

As shown in the drawing, a front plate 62 is vertically fixed to the front end of the vehicle body frame 2 so as to project downward, and the swing frame 61 is substantially attached to the front plate 62. At the central position, it is pivotally supported by a pivot 63 so as to be vertically swingable. In addition, caster-shaped front wheels 6, 6 are disposed on both sides of the swing frame 61. When the electric cylinder 21 is contracted, the body frame 2
Is tilted downward, the traveling front wheels 6 move below the ground contact surface of the belt crawler 13 to contact the travel surface at a position outside the crawler device 3, and when the electric cylinder 21 is extended, When the frame 2 tilts upward, the front running wheels 6 move above the ground contact surface of the belt crawler 13 so as not to contact the ground. However, when the front running wheels 6 are in contact with the running surface, the height difference between the contact surface of the belt crawler 13 and the running surface is set to about 3 cm to 5 cm.

When the carrier 1 having such a structure moves up and down the stairs, the electric cylinder 21 is extended to tilt the vehicle body frame 2 upward as shown in phantom lines in FIG. 6 and in FIG. The front wheels 6 are moved above the ground contact surface of the belt crawler 13 so as not to contact the ground. Then, the belt crawler 13 is driven by the drive motor 8 to move up and down the stairs. When climbing up and down the stairs, the inclined portion 13a of the belt crawler 13 engages with the corner portion of the stairs and pushes up the vehicle body on the stairs, as in the stair carrier of the first embodiment, and the horizontal grounding portion 13
While b straddles two or more steps of the stairs, it contacts each corner and rises. Further, the front wheels 17 and the rear wheels 18 of the tandem wheel mechanism 14 alternately contact the corners of the stairs S to rotate the wheel support plate 15 about the pivot shaft 16 to move the other wheel from the ground contact surface of the belt crawler 13. The belt crawler 13 is located above and does not hinder the driving of the belt crawler 13.

When the transport vehicle 1 travels on a flat ground, the electric cylinder 21 is contracted to tilt the vehicle body frame 2 downward as shown by the solid line in FIG.
Is moved below the ground contact surface of the belt crawler 13 to make the crawler device 3 float. Then, the traveling front wheel 6, the front wheel 17, and the rear wheel 18 are grounded on the traveling surface, and the operator operates the steering handle 5 to push the transport vehicle 1 by hand.
At that time, as shown in FIG. 10, when the transport vehicle 1 travels on a narrow running surface on a flat ground such as a platform of a station, the tip of the transport vehicle 1 approaches the boundary between the platform and the track, and the transport vehicle 1 The front wheel 6 on one side provided in front of the vehicle derails from the traveling surface. Although not shown, when the transport vehicle 1 approaches the entry point of the down stairs while traveling on the platform, one of the front front wheels, which is provided in front of the transport vehicle, derails from the travel surface, as described above. At this time, the swing frame 61 supporting the front running wheels 6 swings, and the belt crawler 13 of the crawler device 3 in the floating state comes into contact with the running surface. Since the crawler device 3 is in the locked state when the drive motor 8 is not driven, the belt crawler 13 of the crawler device 3 is grounded, so that the carrier 1
Will be forced to stop regardless of the operator's control. However, since the height difference between the ground contact surface of the belt crawler 13 and the traveling surface is set to be about 3 cm to 5 cm, the carrier 1 loses its balance when the front running wheels 6 are derailed, and the transport vehicle 1 loses its balance or goes down the stairs. Never fall to.

Although the cylinder device has been described as an electric cylinder in the first and second embodiments, the present invention is not limited to this, and other cylinders such as a hydraulic cylinder may be used. In this case, it is effective in the case where the power is large as compared with the electric cylinder and the weight in the loading platform 4 is heavy.

[0030]

As described above, according to the stair climbing carrier of the present invention, the following effects can be obtained. (1). By expanding and contracting the cylinder device such as an electric cylinder, the vehicle body is tilted in the vertical direction, and the caster wheels project below the grounding surface of the crawler to touch the ground and the position where the caster wheel moves above the grounding surface of the crawler and does not touch the ground. Since it is possible to select and, when moving on a flat land for a short distance such as a landing of stairs, you can quickly move by the tandem wheel mechanism without lowering the caster wheel, and perform efficient stair climbing work be able to. Further, when moving on a flat ground for a long distance, it is possible to lower the caster wheels together with the loading platform so that the tandem wheel mechanism can travel stably.

(2). A brake lever is provided at the grip of the steering wheel to brake the traveling wheels of the tandem wheel mechanism, or to release the brakes, so it is easy to apply the brakes while the vehicle is traveling on level ground or when the vehicle is stopped. be able to. (3). The loading platform is formed by a casing with an opening / closing lid, and the height is set so that the front view can be secured even when the operator with the steering handle raises the vehicle body so that the caster wheels move above the grounding surface of the crawler. In addition, since a partition is provided to prevent the load from moving significantly in the front-rear direction, the visibility when the stairs are raised and lowered is wide and the maneuverability is good. Further, the movement of the center of gravity of the load is reduced, and the vehicle can travel safely.

(4). In the case of a stair climbing carrier that has front running wheels on the front side of the car body, when the carrier travels on a flat ground, for example, when traveling near a narrow running surface or down stairs at the platform of a station, the carrier mistakenly Before the vehicle falls on the railroad track or falls down the stairs, the traveling front wheel provided in front of the transport vehicle derails, and the swing frame supporting the traveling front wheel swings. The crawler device comes into contact with the ground, and the carriage can be forcibly stopped. As a result, it is possible to prevent the transportation vehicle from falling down the track or down the stairs without requiring an expensive safety device such as a sensor, and it is possible to perform a safe transportation work.

[Brief description of drawings]

FIG. 1 is an overall side view of a stair climbing carrier according to a first embodiment of the present invention.

FIG. 2 is a plan view of the same.

3A is a plan view of a main part, and FIG. 3B is a partial side view.

FIG. 4 is a side view showing a state where the stair climbing carrier according to the first embodiment is climbing up and down stairs.

FIG. 5 is a side view showing a state where the stair climbing carrier of the first embodiment is traveling on a flat ground.

FIG. 6 is an overall side view of a stair climbing carrier according to a second embodiment of the present invention.

FIG. 7 is a plan view of the same.

FIG. 8 is a front view of the same.

FIG. 9 is a side view showing a state where the stair climbing carrier of the second embodiment is climbing up and down stairs.

FIG. 10 is a plan view showing a state where the stair climbing carrier according to the second embodiment is traveling on the platform.

[Explanation of symbols]

1 stair climbing carrier 2 vehicle body frame 3 crawler device 4 loading platform 5 steering handle 5a grip 5b operating part 6 running front wheel 61 rocking frame 62 front plate 6
3 Axis 7 Orbital Frame 8 Drive Motor 9 Reduction Mechanism 10 Battery and Electrical Equipment 11 Drive Wheel 12 Idling Wheel 13 Belt Crawler 13a Slope 13b Horizontal Grounding Part 14 Tandem Wheel Mechanism 15 Wheel Support Plate 16, 20 Axis 17 Front Wheel 18 Rear Wheel 19 Caster wheel 21 Electric cylinder 22 Brake lever 22a Lock / unlock claw 23 Brake wire 24 Balance spring 25 Brake 26 Open / close lid 27 Side plate 28 Partition S Stairs GL Flat ground

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeaki Yamagata 2-4-24 Shibata, Kita-ku, Osaka City West Japan Railway Company (72) Satoshi Kobayashi 2-4-2-4 Shibata, Kita-ku, Osaka No. West Japan Railway Company (72) Inventor Mitsuru Shiota 2-4-24 Shibata, Kita-ku, Osaka City West Japan Railway Company

Claims (4)

[Claims] 1. A pair of left and right crawler devices wound with crawlers each having a length in which a horizontal grounding portion extends over at least two steps of stairs, and the crawler device is driven by a drive motor so that the stairs can be moved up and down. The vehicle body, traveling wheels that project downward from the grounding surface of the crawler device, and that travels on a flat ground without grounding the crawler device; steering handles attached to one front and rear end of the vehicle body; In a stair climbing carrier provided with, the crawler device has an inclined portion on the side of the steering wheel that comes into contact with the first corner and goes up the stairs when climbing the stairs. A tandem wheel mechanism that pivotally supports traveling wheels is provided at both ends of a wheel support plate whose intermediate portion is pivotally supported in a forward and backward direction at a boundary portion with a horizontal grounding portion, and between the crawler device and the vehicle body. A cylinder device for tilting the vehicle body up and down with respect to the crawler device is provided, and a caster wheel is attached to the lower surface of the vehicle body opposite to the steering handle. The cylinder device allows the vehicle body to tilt up and down with the steering handle side as a fulcrum. However, the stair lift carrier is characterized in that it is possible to select between a position where the crawler device projects downward from the ground surface and is grounded, and a position where the crawler device moves above the ground surface and is not grounded. 2. The stair climbing carrier according to claim 1, wherein the grip portion of the steering handle is provided with a brake lever for braking or releasing the traveling wheel of the tandem wheel mechanism. 3. The front view is formed even when the operator has the steering handle formed by a casing having an opening / closing lid and the vehicle body is tilted so that the caster wheels move above the ground contact surface of the crawler device. The height should be secured,
The stair lift transport vehicle according to claim 1 or 2, wherein a partition is provided in the casing to prevent the load from largely moving in the front-rear direction. 4. A pair of left and right crawler devices wound with crawlers each having a horizontal grounding portion extending over at least two steps of stairs, and a crawler device for driving the crawler device so that the stairs can be moved up and down. A cylinder device that has a vehicle body and traveling wheels disposed on the rear side of the crawler device, and that tilts the vehicle body up and down with respect to the crawler device is provided between the crawler device and the vehicle body. In a stair climbing carrier configured such that the crawler device comes into contact with the ground to climb the stairs when tilted in a direction, a pair of left and right traveling front wheels are provided on a swing frame at a position on the front side of the vehicle body. When the swing frame is swingably supported in the vertical direction with respect to the vehicle body and the vehicle body is tilted downward, the front wheels and the traveling wheels are grounded to travel on a flat ground. A stair lift carrier characterized by being configured as described above.