JPH0966839A - Stair climbing carrier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stairs climbing carrier which can stably and easily travel on the flat ground and also climb stairs. SOLUTION: This stair climbing carrier is provided with the first tandem wheel mechanism 6 in which, at both ends of a wheel supporting plate 61 whose midpoint is turnably pivoted, rolling wheels 62 which travel on flat ground downwardly projected from the landing surface of a crawler device 3, are pivoted and the wheels 62 swing alternatively in vertical direction on the grounding surface of the crawler 3 as a border and the second tandem wheel mechanism 7 having rolling wheels 74 at forward area. On traveling on the flat ground, the rolling wheels 62 and 74 respectively provided for the first and the second tandem wheel mechanisms 6 and 7 are landed for traveling, while on climbing stair s, the crawler device 3 is driven so that the rolling wheels 62 and 74 are alternately swung.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stair climbing carrier for traveling on flat ground or climbing stairs to carry luggage in railway station buildings on multi-story floors, public and private buildings, and the like.

[0002]

2. Description of the Related Art In recent years, a carrier vehicle has been developed which travels on a flat ground and moves up and down stairs in order to reduce the labor of a worker who brings in products such as drinking water or books to a shop at a station platform. Generally, in the case of such a stair climbing transport vehicle, a vehicle body provided with a crawler device has traveling wheels dedicated to traveling on a flat ground, and when traveling on a flat ground, the traveling wheels are When the stairs are raised and lowered by grounding and traveling manually, the crawler device is driven so that the stairs can be raised and lowered.

As an example of the above-mentioned conventional technique, the applicant of the present invention has proposed a stair climbing carrier as shown in FIGS.
As shown in the figure, the stair climbing carrier a is provided with a pair of left and right belt crawlers c on a loading platform b, is positioned in front of the loading platform b and outside the belt crawlers c, and supports a rolling wheel d. The arm e is pivotally supported on the frame under the loading platform b so that the arm e can swing back and forth. And when going up and down the stairs,
As shown in FIG. 9, the arm e is pivoted upward to position the rolling wheel d above the ground contact surface of the belt crawler c to move up and down the stairs. Further, when traveling on a flat ground, as shown in FIG. 10, the arm e is rotated downward so that the rolling wheel d projects downward from the grounding surface of the belt crawler c, and the rolling wheel d is grounded on a flat ground. Then, the operator holds the handle f provided integrally with the loading platform b, and pushes the carrier a while tilting the carrier a with the wheel d as a fulcrum to drive the vehicle (Japanese Patent Publication No. 52-3005).
No. 0 publication).

[0004]

By the way, in the above conventional stair climbing carrier a, when traveling on a flat ground, the operator pushes the carrier a while holding the handle f and tilting the carrier a with the wheel d as a fulcrum. Since the vehicle travels, a load is applied to the steering wheel f, which imposes a considerable burden on the operator. In addition, since the arm e has to be rotated to position the rolling wheel d every time the traveling from the flatland to the stairs or from the stairs to the flatland is performed, the work efficiency is extremely poor, and When positioning the wheel d, the operator releases the handle f to perform the positioning work.
The balance of

The present invention has been devised in order to solve such problems, and it is possible to stably and easily run on flat ground and stairs in railway station buildings on multiple floors, public and private buildings, etc. It is an object to provide a stair lift transport vehicle that can be lifted and lowered.

[0006]

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. Stair climbing provided with a vehicle body capable of moving up and down stairs by driving a crawler device by a drive motor, a loading platform provided on the vehicle body, and a handle portion integrally provided with the loading platform and projecting to the rear side of the vehicle body In the transport vehicle, at the rear end positions of the pair of left and right crawler devices, at both ends of a wheel support plate whose intermediate portion is rotatably supported, project below the ground plane of the crawler device and ground the crawlers. A first tandem wheel mechanism is provided, which supports a traveling wheel that travels on a flat ground in a state where the device is not grounded, and the traveling wheel alternately swings up and down with a grounding surface of the crawler device as a boundary. 1 ta Proceed below the grounding surface of the crawler device to a position forward of the dem wheel mechanism, run on a flat ground without touching the crawler device to ground, and swing up and down alternately with the ground surface of the crawler device as a boundary. A second tandem wheel mechanism having moving traveling wheels is provided, and when traveling on a flat ground, the traveling wheels provided on the first and second tandem wheel mechanisms are grounded while traveling, and when the stairs are elevated and lowered, the crawler device is provided. Is driven to alternately swing the traveling wheels to move up and down stairs.

The second tandem wheel mechanism has a rotary shaft pivotally supported between the pair of left and right crawler devices, and a first rotary shaft fixed to the rotary shaft so as to project to the front of the crawler device. A wheel support member, a second wheel support member that projects toward the rear of the crawler device and is fixed to the rotary shaft at a predetermined distance from the first wheel support member, and the first and second wheels And a traveling wheel that is rotatably supported by a support member, and the traveling wheel alternately swings up and down with the ground contact surface of the crawler device as a boundary. .

Further, the second tandem wheel mechanism is provided near the center of gravity of the crawler device.

[0009]

With the above construction, when traveling on a flat ground, the stair climbing carrier according to the present invention has traveling wheels of the first tandem wheel mechanism provided at the rear end position of the crawler device and the first tandem wheel mechanism.
Since the traveling wheels of the second tandem wheel mechanism, which is provided in front of the tandem wheel mechanism, project below the ground contact surface of the crawler device, the transport vehicle is stably supported by the plurality of traveling wheels. The operator can easily move the carrier by holding the handle.

When the stair climbing carrier moves up and down the stairs, the operator drives the crawler device to lift the carrier. At this time, when one traveling wheel protruding downward from the ground contact surface of the crawler device comes into contact with the ridge line of the stairs, the traveling wheel moves above the ground contact surface of the crawler device and the other traveling wheel moves downward. And the traveling wheels alternately swing up and down like a seesaw so as to bring the crawler device into contact with the ridge of the stairs. As a result, the stair lift carrier moves up and down the stairs without the running wheels interfering.

Further, when the stair climbing carrier approaches the stairs from the flat ground and descends from the front side, the front side of the crawler device comes out into the air while maintaining the horizontal state. Then, the second tandem wheel mechanism approaches the ridge of the first stairs, and when the traveling wheels sway, the crawler device touches the ridge of the first stair, and at that point the carrier changes from the horizontal state to the inclined state. Displace and move down the stairs. At this time, since the second tandem wheel mechanism is provided near the center of gravity of the crawler device, the load balance in the front-rear direction of the carrier is good, and the operator can move the carrier from the horizontal state to the inclined state in a stable state. It can be performed.

[0012]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. 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 of a crawler device. In the figure, reference numeral 1 is a stair climbing carrier, which is provided with crawler devices 3 for driving the stairs up and down on both left and right sides of a body frame 2 and a loading platform 4 above the body frame 2, respectively. There is. Further, a handle 5 is provided integrally with the luggage carrier 4 so as to project to the rear side of the vehicle body frame 2.

The vehicle body frame 2 has a pair of left and right track frames 21 and 21 formed in a warp shape in a side view, and vertical frames 22 and 22 fixed to the rear ends of the track frames 21 and 21 and rising obliquely upward. And an upper frame 23 which is formed in a U shape in a plan view and whose tip portion is rotatably supported by the tip portions of the track frames 21 and 21.
The body frame 2 is formed in a triangular shape in side view.
In addition, due to the strength of the frame, the orbital frames 21, 21
The horizontal frames 24 and 25 are arranged so as to straddle. The upper frame 23 has a U-shaped cross section so that a slide pipe, which will be described later, can be fitted into the recess, and a plurality of positioning holes 23a are provided on the side surface. .

The crawler device 3 has drive wheels 31, 31 attached to the front ends of the track frames 21, 21.
And idler wheels 32, 32 attached to the upper ends of the vertical frames 22, 22, drive wheels 31, 31 and idler wheel 3
Belt crawlers 33, 33 wound between the two
It is composed of The belt crawler 33 contacts the corners of the stairs over two or more steps and moves up and down the stairs. The belt crawler 33 is combined in consideration of protection and cushioning action of the stairs when driving. Lugs (not shown), which are made of an elastic material such as rubber and have a trapezoidal cross section suitable for climbing stairs, are arranged at a predetermined pitch on the outer peripheral surface of the drive wheel 31. , 31 and the idler wheels 32, 32 are formed with a row of protrusions (not shown) that engage with the drive teeth formed on the outer periphery of the belt crawler 33. Also, the track frame 2
1, a drive motor 34 and a battery 35 are mounted across the drive wheels 31 and 31.
It is designed to be driven by.

A first tandem wheel mechanism 6 is provided outside the belt crawlers 33, 33 at the rear end positions of the pair of left and right crawler devices 3. In the first tandem wheel mechanism 6, traveling wheels 62, 62 are rotatably supported at both ends of a wheel support plate 61 having a laterally long, jagged edge. One end of a pivot shaft 63 is fixed to an intermediate portion of the wheel support plate 61, and the pivot shaft 63 is rotatably supported by the track frames 21 and 21.
A connecting piece 64 is provided at the other end of the. Also, the connecting piece 6
4 and the vertical frame 22 are connected by a spring 65, and the vehicle support plate 61 is urged to be parallel to the crawler device 3. Therefore, the traveling wheels 62, 6
2 always projects (when traveling on a flat surface) downward from the belt crawler 33, and the traveling wheels 6
When a load is applied to only one of the two wheels 62, 62, the traveling wheel 62 moves upward, the other traveling wheel 62 moves downward, and the traveling wheels 62, 62 make a so-called seesaw with the belt crawler 33 as a boundary. Rocks up and down alternately.

Further, a second tandem wheel mechanism 7 is provided near the center of gravity of the crawler device. The second tandem wheel mechanism 7 includes a rotary shaft 71 pivotally supported by the track frames 21 and 21, and a first wheel support fixed to the rotary shaft 71 so as to project to the front of the crawler device 3. The member 72, a second wheel support member 73 fixed to the rotating shaft 71 with a predetermined distance from the first wheel support member 72 so as to project rearward of the crawler device 3, It is composed of traveling wheels 74, 74 pivotally supported by the second wheel support member. Further, the rotating shaft 71
And the lateral frame 25 are connected by a spring 75, and the first wheel support member 72 and the second wheel support member 73 are urged to be parallel to the crawler device 3. Therefore, the traveling wheels 74, 74 are always protruding (during traveling on a flat ground) downward from the belt crawler 33, and when a load is applied to only one of the traveling wheels 74, 74, the traveling wheel 74, 74 travels. The wheel 74 moves upward, the other traveling wheel 74 moves downward, and the traveling wheels 74 and 74 alternately swing up and down like a so-called seesaw with the belt crawler 33 as a boundary.

Further, as shown in FIGS. 3 and 4, the loading platform 4 has an iron plate 43 fixed on a frame pipe 41 assembled in a rectangular shape and a horizontal frame 42 fixed to the frame pipe 41. It is formed, and a luggage support plate 44 on which a luggage is placed is provided at the front end, and a U-shaped handle 5 is formed at the rear end by extending the frame pipe 41. And the clutch lever 51,
52 is provided.

A first slide pipe 45 extending in the lateral direction is provided at the tip of the loading platform 4, and the first slide pipe 45 is slidably fitted on the upper frame 23 having a U-shaped cross section. Have been combined. As shown in FIG. 4, the first slide pipe 45 is formed in a hollow shape, and the pipe 45 is internally provided with engagement pins 45a and 45b. The engaging pins 45a and 45b have connection projections 45c and 4
5d is provided, and the connecting protrusions 45c and 45d are movable left and right along an elongated hole 45e formed in the first slide pipe 45.
45b is constantly urged outward (so as to project from the slide pipe 45) by a spring 45f. Further, the tip of the inner wire 51a is fixed to the connecting protrusion 45d, the inner wire 51a is inserted into the connecting protrusion 45c, and further, the inner wire 51a of the inner wire 51a is inserted into the connecting protrusion 45c via a stopper 45g. The outer sheath 51b, which is a jacket, is fixed. The inner wire 51a and the outer sheath 51b are connected to the clutch lever 51, and the clutch lever 5
By gripping 1, the inner wire 51a is pulled, the engagement pin 45b is pulled by the inner wire 51a, the engagement pin 45a is pushed by the outer sheath 51b, and the engagement pins 45a and 45b slide against the spring 45f. It is housed in the pipe 45. The slide pipe 45 configured as described above has the engagement pins 45a and 45b.
Are fixed by engaging with positioning holes 23a provided in the upper frame 23, and the engaging pins 45a, 4 by grasping the clutch lever 51 during sliding movement.
5b is removed from the positioning hole 23a and slid along the upper frame 23.

Further, two luggage carrier support rods 46 are rotatably provided on the lateral frame 42 provided at a position slightly forward of the center of the luggage carrier 4, and the luggage carrier support rods 46 are provided.
A second slide pipe 47 is fixed to the tip of the.
The second slide pipe 47 is the first slide pipe 45.
The upper frame 23 is slidably fitted to the upper frame 23. And the clutch lever 52
The engaging pins 47a and 47b are accommodated in the slide pipe 47 by operating the, and the engaging pins 47a and 47b are removed from the positioning holes 23a, and the second slide pipe 47 is slid along the upper frame 23 to obtain an appropriate It is designed to be positioned by position.

As described above, the luggage carrier 4 includes the first slide pipe 45 and the second slide pipe 47 as the upper frame 2.
By sliding along 3, as shown in FIG.
It is movable with respect to the vehicle body frame 2, and the first slide pipe 45 and the second slide pipe 47 are provided at arbitrary positions on the upper frame 23 at arbitrary positions.
By fixing to 3a, the loading platform 4 can be fixed to an arbitrary position. Therefore, when the luggage is loaded on the luggage support plate 44 in a state where the luggage carrier 4 is tilted, a load is concentrated on the tip of the luggage carrier 4, and this load point is moved to an arbitrary position with respect to the vehicle body frame 2. Therefore, since it is possible to displace the vicinity of the center of gravity of the stair climbing carrier 1, it is possible to stably carry the luggage. Incidentally, the most stable position where the vehicle can travel is when the tip end position of the loading platform 4 is set above the position where the second tandem wheel mechanism is provided.

Further, the loading platform 4 includes a first slide pipe 45.
By fixing the and sliding the second slide pipe 47, the angle of the loading platform 4 can be adjusted as shown in FIG. Therefore, the inclination angle of the loading platform 4 can be adjusted according to the type of luggage M to be transported, the height of the operator, and the work posture, and the luggage can be transported in a stable and comfortable manner.

Next, the operation of the stair climbing carrier 1 described above will be described. When the stair climbing carrier 1 travels on a flat ground, the traveling wheels 62 of the first tandem wheel mechanism 6 provided at the rear end position of the crawler device 3 and the front of the first tandem wheel mechanism 6 are provided. The traveling wheels 74 of the second tandem wheel mechanism 7 provided near the center of gravity of the crawler device 3 and the traveling wheels 74 of the crawler device 3, that is, the belt crawler 33.
It projects further downward. Therefore, the stair climbing carrier 1 is stably supported by the traveling wheels 62 and 74. The loading platform 4 is slidably fixed to the vehicle body frame 2 in accordance with the load position of the loaded luggage M, and the tilt angle is adjusted according to the height and working posture of the operator. Then, the operator holds the steering wheel 5 and pushes the carrier 1 stably and comfortably to travel on a flat ground.

When the stair climbing carrier 1 goes up and down the stairs, the operator drives the crawler device 3 to move the carrier 1 up and down the stairs. At this time, as shown in FIG. 7, one of the traveling wheels 6 protruding downward from the ground contact surface of the crawler device 3 by the first and second tandem wheel mechanisms 6 and 7.
When the wheels 2, 74 come into contact with the ridge S ′ of the stairs S, the traveling wheels 62, 74 are pushed by the ridge S ′ and move above the ground contact surface of the crawler device 3. Then, the other traveling wheels 62, 74 move downward, and the traveling wheels 62, 74 alternate with the seesaw at the belt crawler 33 so that the belt crawler 33 of the crawler device 3 abuts on the ridge line portion S ′ of the stairs. It swings up and down like. As a result, the stair climbing carrier 1 moves up and down the stairs without the traveling wheels 62, 74 interfering.

Further, when the stair climbing carrier 1 approaches the stairs from a flat ground and descends from the front side, as shown in FIG. 8, the front side of the crawler device 3 jumps out into the air while maintaining the horizontal state. Like Then, when the second tandem wheel mechanism 7 approaches the ridge line portion S1 of the first stairs and the traveling wheel 74 swings, the belt crawler 33 of the crawler device 3 comes into contact with the ridge line portion S1 of the first staircase, and at that point. The carrier 1 is displaced from the horizontal state to the inclined state, and the stairs descend. At this time, since the second tandem wheel mechanism 7 is provided near the center of gravity of the crawler device 3, the load balance in the front-rear direction of the carrier 1 is good, and the operator tilts the carrier 1 from the horizontal in a stable state. It is possible to change the state to.

Although the second tandem wheel mechanism 7 has been described as having a different structure from the first tandem wheel mechanism in the above-described embodiment, the present invention is not limited to this, and for example, the second tandem wheel mechanism is the first tandem wheel mechanism. It may be provided outside the vicinity of the center of gravity of the crawler device 3 in the same manner as the tandem wheel mechanism.

[0026]

As described above, according to the stair climbing carrier of the present invention, the traveling wheels alternately swing up and down like a seesaw in the front-back direction of the crawler device with the ground contact surface of the crawler device as a boundary. Since the first tandem wheel mechanism and the second tandem wheel mechanism are provided, it is possible to travel while supporting the transport vehicle by the traveling wheels during flat traveling.
Also, when climbing the stairs, climb the stairs so that the traveling wheels do not get in the way. As a result, the operator can operate the stair climbing carrier stably and comfortably without being burdened by the load of luggage.

Further, since the second tandem wheel mechanism is provided in the vicinity of the center of gravity of the crawler device, the attitude of the carrier can be stably displaced when going down stairs from a flat ground. Therefore, it becomes possible to prevent an accident in which the carrier is out of balance and the transport vehicle falls from the stairs.

[Brief description of drawings]

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

FIG. 2 is a top view of a crawler device.

FIG. 3 is an explanatory diagram of a configuration of a luggage carrier.

FIG. 4 is an explanatory view of the action of the luggage carrier.

FIG. 5 is a side view when the loading platform slides.

FIG. 6 is a side view when the loading platform is inclined.

FIG. 7 is an explanatory view of the operation of the stair climbing carrier.

FIG. 8 is an operation explanatory view of the stair climbing carrier.

FIG. 9 is an explanatory diagram of a conventional example.

FIG. 10 is an explanatory diagram of a conventional example.

[Explanation of symbols]

 1 stair climbing carrier 2 body frame 21 track frame 22 body frame 23 upper frame 24 horizontal frame 25 horizontal frame 3 crawler device 31 drive wheel 32 idler wheel 33 belt crawler 34 drive motor 35 battery 4 loading platform 41 frame pipe 42 horizontal frame 43 iron plate 44 luggage support plate 45 first slide pipe 46 carrier support rod 47 second slide pipe 5 steering handle 51 clutch lever 52 clutch lever 6 first tandem wheel mechanism 61 wheel support plate 62 running front wheel 63 pivot 64 connecting piece 65 spring 7th 2 Tandem wheel mechanism 71 Rotating shaft 72 First wheel support member 73 Second wheel support member 74 Traveling wheel 75 Spring S Stairs M Luggage

Claims (3)

[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. In a stair climbing carrier comprising a vehicle body, a luggage carrier provided on the vehicle body, and a handle portion integrally provided with the luggage carrier and projecting to the rear side of the vehicle body, at the rear end positions of the pair of left and right crawler devices, At both ends of a wheel support plate whose intermediate portion is rotatably supported, a traveling wheel that runs on a flat ground is projected so as to project downward from the grounding surface of the crawler device and not ground the crawler device. Then, a first tandem wheel mechanism is provided in which the traveling wheels alternately swing in the vertical direction with the ground contact surface of the crawler device as a boundary, and a contact point of the crawler device is provided at a position in front of the first tandem wheel mechanism. A second tandem wheel mechanism having a traveling wheel that protrudes downward from the surface and travels on a flat ground without grounding the crawler device and alternately swings up and down with the ground surface of the crawler device as a boundary. When traveling on a flat ground, the traveling wheels provided on the first and second tandem wheel mechanisms are grounded for traveling, and when climbing stairs, the crawler device is driven to alternately swing the traveling wheels. A stair lift carrier characterized by being configured to lift and lower stairs. 2. The second tandem wheel mechanism has a rotating shaft pivotally supported between the pair of left and right crawler devices, and a first fixed to the rotating shaft so as to project to the front of the crawler device. A wheel supporting member, a second wheel supporting member fixed to the rotating shaft at a predetermined distance from the first wheel supporting member so as to project rearward of the crawler device, and the first and second wheel supporting members.
And a traveling wheel pivotally supported by a second wheel supporting member so that the traveling wheel alternately swings up and down with a ground contact surface of the crawler device as a boundary. The stair climbing carrier according to claim 1. 3. The second tandem wheel mechanism is provided near the center of gravity of a crawler device.
The listed stair lift carrier.