JPH04287779A - Baggage conveying stairway ascending vehicle - Google Patents

Abstract

PURPOSE:To provide a baggage conveying stairway ascending vehicle allowing a feeble worker to convey a heavy object via a stairway and capable of being easily turned in direction at a narrow halfpace. CONSTITUTION:A baggage 30 is mounted on a baggage mount base 70 provided on a vehicle body 40, and a baggage conveying stairway ascending vehicle ascends on a stairway with driving wheels 42, 44 arranged at the front and rear of the vehicle body 40. The baggage mount base 70 of the vehicle is moved to the rear of the vehicle body 40 to erect the vehicle body 40 backward, and the rear end of the vehicle body 40 erected backward is movably supported by a support roller 84. When the baggage 30 is mounted to ascend on the stairway, and the vehicle body 40 can be erected at the halfpace 200 of the stairway for a direction change.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a stair-climbing vehicle for transporting luggage that climbs stairs with luggage loaded thereon, and in particular, a luggage transport vehicle that can easily change direction at stair landings even when loaded with luggage. Regarding stair climbing vehicles.

0002

[Prior Art] In recent years, large office machines and vending machines often have to be transported through the stairs of buildings and stations, and for this reason, anyone can easily transport large and heavy luggage. It is desired to develop a stair-climbing vehicle for carrying luggage that can carry cargo.

[0003] In particular, in buildings built in limited spaces, the width of the stairs is small and the landings connecting the stairs are often narrow. It is desired to develop a stair-climbing vehicle for transporting cargo that can change direction.

[0004] FIG. 7 shows an example of a conventional hand-held load carrier. This carrier is provided with a hand push part 10 at one end of the vehicle body 12, a wheel with rubber tires 14 on the lower surface of the other end, and a radial shape having small wheels 16, 16, . wheel 1
8 is provided.

FIG. 8 shows a conventional stair-climbing vehicle for carrying luggage that climbs up and down stairs using a rotationally driven endless track belt. In this climbing vehicle, wheels 24 with rubber tires are attached to the lower surface of the other end of a vehicle body 22, which is provided with a hand push part 20 at one end. Further, below the vehicle body 22, an endless track belt 28 is provided which is driven by a drive device 26.

[0006]

[Problems to be Solved by the Invention] The conventional hand-pushed luggage carrier shown in FIG. 18 is rolled to move up and down. Therefore, the vehicle body 12 simply does not rub against the stairs; when going up or down stairs, the vehicle body 12 loaded with luggage must be pulled up manually, and when descending, it must be manually restrained so that it does not run out of control. Must be. Therefore, there is a problem that it cannot be used for transporting heavy loads, especially large vending machines.

Furthermore, the conventional climbing vehicle shown in FIG. 8 moves manually while rolling the wheels 24 on flat ground, and when it approaches stairs, it drives the endless track belt 28 to move up and down the stairs using power. It is. Therefore, even fairly heavy loads can be moved up and down the stairs, but the track belt 28
There was a problem in that the contact only came into contact with the corners of the stairs, causing severe damage to these corners.

[0008]Furthermore, there is often insufficient lateral space on staircase landings, especially when a large vending machine is loaded horizontally and carried up and down the stairs.
The landing space is often insufficient compared to the horizontal size of the vending machine. For this reason, when using a conventional climbing vehicle to pass a landing, the worker must lift the vehicle body 22 together with the loaded cargo and change direction while avoiding hitting the surrounding walls, forcing the worker to perform heavy labor. There was a problem.

It is extremely difficult to manually raise the vehicle body 22 loaded with large and extremely heavy vending machines, especially on narrow landings. It is almost impossible for workers who lack physical strength to transport cargo to the upper floors such as the 6th and 7th floors, and an effective countermeasure has been desired.

OBJECTS OF THE INVENTION The present invention was made in view of the above-mentioned conventional problems, and its first purpose is to make it possible for even workers with low physical strength to carry heavy objects through stairs. To provide a stair-climbing vehicle for carrying cargo, which can easily change direction even on a narrow landing.

Another object of the present invention is to provide a stair climbing vehicle for transporting luggage that can transport luggage without damaging the stairs.

0012

[Means for Solving the Problems] In order to achieve the first object, the present invention provides a method for loading cargo on a cargo loading platform provided on a vehicle body, and at least four driving wheels disposed at the front and rear of the vehicle body. A stair-climbing vehicle for transporting luggage, which is configured to be able to climb stairs, comprising: a center of gravity moving means for moving the luggage platform to the rear of the vehicle body and standing the vehicle body rearward; A support portion that supports the device in a movable manner;
When climbing stairs with luggage loaded, the vehicle stands up at the landing of the stairs and changes direction.

[0013] Here, it is preferable to provide auxiliary wheels between the front drive wheels and the rear drive wheels for movement between the stairs and the landing.

Furthermore, in order to achieve the second object, the present invention is characterized in that a deformable tire that deforms depending on the weight of loaded cargo is used as the driving wheel.

[0015]

[Operation] Next, the operation of the present invention will be explained.

[0016] The climbing vehicle of the present invention loads luggage on a luggage loading platform provided on the vehicle body, and climbs stairs using at least four driving wheels arranged at the front and rear of the vehicle body. Therefore, even large items such as vending machines can be easily transported through the stairs. At this time, by providing auxiliary wheels between the front drive wheels and rear drive wheels provided on the vehicle body, when the climbing vehicle moves from the stairs to the landing, or vice versa, from the landing to the stairs. Since the vehicle body can be supported by either one of the front drive wheels or the rear drive wheels and the auxiliary wheels, movement between the landing and the stairs can be performed smoothly.

The main feature of the present invention is that when a climbing vehicle loaded with luggage reaches a staircase landing, the luggage platform is moved to the rear of the vehicle body, and the center of gravity is moved rearward, thereby causing the vehicle body to move backward. It is about standing up. At this time, the vehicle body standing rearward is movably supported using the support portion.

[0018] Accordingly, in a limited landing space, the direction of the vehicle loaded with luggage can be easily changed, and the vehicle can proceed to the next staircase.

Another feature of the present invention is that deformed tires are used as each of the drive wheels. As a result, when a climbing vehicle loaded with luggage ascends or descends stairs, its tires are compressed by the corners of the stairs, deform greatly, and come into contact with the treads of the stairs over a wide area. Therefore, even when carrying a heavy load, it can be safely carried upstairs without damaging the stairs.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 3 shows a preferred example of the stair climbing vehicle for carrying luggage according to the present embodiment, and FIG.
0, and (B) shows the state of the vehicle climbing stairs 10.
The state of the vehicle moving from zero to landing 200 is shown.

[0022] The climbing vehicle of the embodiment has the following parts at the front and rear of the vehicle body 40.
A pair of left and right front drive wheels 42 and a pair of left and right rear drive wheels 44 are provided, and each of these drive wheels 42 and 44 is rotationally driven in the direction shown by the arrow in the figure by a drive motor provided inside the vehicle body. ing. And each of these driving wheels 42, 4
4 is constructed using a soft rubber tire 48 having a large number of protrusions 50, 50, .

[0023] Also, the front and rear drive wheels 42, 44 of the vehicle body 40
A pair of left and right auxiliary wheels 46 are provided between them. The auxiliary wheels 46 have a somewhat smaller diameter than the driving wheels 42 and 44, and are formed using tires 52 having substantially the same structure.

In each of the wheels 42, 44, 46, the internal pressure of the tires 48, 48, 52 is such that when climbing the stairs, the tires are greatly deformed as shown in the figure, and the tread surface 110 of the stairs 100 is
and is set to a value such that it contacts the vertical surface 120 over a wide area. For this reason, it is preferable to adjust the internal pressure so that the tire deforms by a predetermined amount when the vehicle is loaded with cargo on flat ground. In this embodiment, an air pressure adjustment device is provided in the vehicle body 40, and the tires 48, 5 are adjusted using this adjustment device.
2 internal pressure is adjusted.

Further, the axle of each of these wheels 42, 44, 46 is provided with a reverse rotation prevention device as shown in FIGS. 4 and 5, for example.

In the reverse rotation prevention device shown in FIG. 4, tapered small chambers 62, 62, 62 are provided in a fixed member 60 surrounding the axle 54, and within each small chamber 62, a hard ball 64 is pressed in the narrow direction by a spring 66. There is. As a result, the axle 54 can rotate in the forward rotation direction indicated by the arrow in the figure, but cannot rotate in the opposite direction.

In the reverse rotation prevention device shown in FIG. 5, an engaging pawl 69 whose one end is pivotally supported by a shaft 67 is pressed against a ratchet gear 68 fixed to an axle 54 by the biasing force of a spring 65. There is. As a result, the axle 54 can rotate in the direction of the arrow in the figure while pushing up the locking pawl 69, but the pawl 69 can rotate in the opposite direction.
be bound by.

Further, as shown in FIG. 2, a luggage mounting table 70 is attached and fixed to the upper surface of the vehicle body 40 using, for example, rollers 72 so as to be slidable in the front and rear directions. A rear end plate 74 is provided at the rear end of the luggage platform 70 to prevent the luggage from sliding backward when climbing stairs.

In order to move the cargo platform 70 in the front-back direction, a motor 78 is provided inside the vehicle body 40, and a screw 80 is provided in the front-rear direction. One end of the screw 80 is connected to the rotating shaft of the motor 78, and the other end is rotatably supported by a bearing (not shown). A ball screw 76 is provided on the lower surface side of the cargo platform 70 so as to be engaged with the screw 80, and thereby a motor 78
By driving the screw 80 in the forward or reverse direction using the screwdriver, the cargo platform 70 moves forward or backward on the upper surface of the vehicle body 40.

In this embodiment, the luggage 30 is placed on the luggage loading table 70.
With the vehicle loaded, the cargo platform 70 is slid rearward as shown by the broken line in the figure, and at this time, the center of gravity moves to the rear of the rear drive wheels 44, so that the vehicle body is moved to a predetermined position as shown in FIG. 1(B). It is formed to stand up at an angle. The standing angle at this time can be arbitrarily set as necessary, but in the embodiment, it is set in the range of 60 to 80 degrees. In order to support the vehicle body 40 in an upright state in a movable manner, a support roller 8 is provided at the rear end of the luggage platform 70.
4 is rotatably attached and fixed. Thereby, the vehicle body 40 can be erected with cargo loaded on it, for example, on a landing such as a staircase, without bothering the worker.

[0031] The upright climbing vehicle can then be guided to the next stairway while being manually changed direction by the worker.

FIG. 6 shows an example of a control circuit for a climbing vehicle according to the embodiment.

The climbing vehicle 400 of the embodiment is configured to be wirelessly and remotely controlled by a remote control device 300.

[0034] Remote control device 300 of the embodiment
The operation section 310, the transmission control section 320, and the transmission section 33
0 and a transmitting antenna 340. And the operation part 3
10 is configured to give commands for running and stopping the vehicle, sliding movement of the luggage platform 70, and adjusting the air pressure of the tires 48, 52. The worker's command input via the operation unit 310 is converted into a predetermined signal by the transmission control unit 320 and wirelessly transmitted to the climbing vehicle 400 via the transmission unit 330 and the transmission antenna 340. .

The climbing vehicle 400 is provided with an antenna 410 , a receiving section 420 , and a control unit 430 . The antenna 410 and the receiving section 420 receive a signal transmitted from the remote control device 300 , and input the received signal to the control unit 430 . It is configured like this.

If the received signal is a signal instructing the vehicle to run or stop, the control unit 430
Each drive wheel 42, 4 is connected via a wheel drive actuator 450.
4 drive motor 460 is controlled.

Furthermore, if the received signal is a signal instructing the vehicle body 40 to stand up or to release it, the motor 78 is controlled via the slide motor actuator 440.

[0038] Also, the received signal is transmitted to the tires 48, 52
If the signal is a command to adjust the internal pressure of the air pressure, the air pressure adjustment device 48 is sent via the air pressure adjustment actuator 470
0 to increase or decrease the internal pressure of the tires 48, 52.

The present embodiment has the above configuration, and its operation will be explained next.

First, when transporting a large baggage 30 such as a vending machine using the toll vehicle of the embodiment,
This baggage 30 is fixed on a baggage mounting table 70 using belts 32, 32, as shown in FIG.

Next, before starting to transport the cargo, the worker checks whether the tire air pressure is appropriate. That is, the internal pressure of the tire is adjusted using the remote control device 300 so that the tire is deformed by a predetermined amount when the cargo 30 is loaded on flat ground.

[0042] When this internal pressure adjustment process is completed,
Next, as shown in FIG. 3(A), the vehicle is made to climb stairs 100. At this time, the tires 48 of the front and rear wheels 42, 44 are greatly deformed and come into contact with the stair tread 110 over a wide area. This prevents excessive force from being applied only to the corner portions 130 and damaging them, and even very heavy loads 30 can be easily transported. Moreover, since each wheel 42, 44, 46 is provided with a reverse rotation prevention device, it is possible to effectively prevent the vehicle from falling downward due to any cause.

When the vehicle reaches the top of the stairs 100, the vehicle is supported by the rear drive wheels 44 and the auxiliary wheels 46, and the front drive wheels 42 are suspended in the air, as shown in FIG. 3(B). . As the vehicle moves forward, the front drive wheels 42 then touch the floor 210 of the landing 200, and
The rear drive wheels 44 become suspended in the air, and as the vehicle moves forward, the rear drive wheels 44 also move onto the floor surface 210 as shown in FIG. 1(A).

When the vehicle loaded with the luggage 30 reaches the landing 200 in this manner, the vehicle is temporarily stopped, and then the luggage platform 70 is moved backward a predetermined distance as shown in FIG. 1(B). To automatically stand up a vehicle at a predetermined angle by moving the center of gravity when the vehicle is moving. At this time, the vehicle is held in a stable upright state by the left and right rear drive wheels 44 and the support rollers 84.

[0045] Therefore, the worker can easily change the direction of the vehicle standing up in this way by lightly pushing it from the rear. Even if you are facing the opposite direction, you can easily change direction on the landing and guide yourself to the next staircase.

[0046] Then, when the vehicle has been guided to the next staircase, the luggage platform 70 is moved forward, and the center of gravity is moved at this time, causing the front drive wheels 42 to land on the ground.
Apply an appropriate load to 2. Then, in this state, climb the next staircase again.

By repeating the above operations, even if there is a narrow landing in the middle of the stairs, the luggage 30 can be removed at the landing.
The cargo 30 can be transported while changing direction so as not to contact the wall.

Note that descending stairs using the climbing vehicle of the embodiment can be performed in the same manner as climbing stairs.

Note that the present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the gist of the present invention.

For example, in the above embodiment, the case where a climbing vehicle is remotely controlled has been explained, but the present invention is not limited to this, and the climbing vehicle is provided with an operation handle and an operation panel to control the climbing vehicle You may also do this.

[0051] Furthermore, in the above embodiment, the case where the worker visually adjusts the tire air pressure was explained as an example, but the present invention is not limited to this. It's okay. In this case, for example, as shown by the broken line in FIG. 6, a weight detection sensor 500 that automatically detects the weight of the luggage 30 placed on the luggage platform 70, and a memory 510 that records the relationship between weight and air pressure. and. This memory 510 stores the weight of the luggage 30 and the tires 48.
, 52 and the internal pressure are stored using, for example, the slope of the stairs as a parameter. Then, when the worker inputs various data such as the slope of the stairs using the operation unit 310 of the control device 300, the control unit 430 stores the weight detected by the weight detection sensor 500 and the data stored in the memory 510. The optimum internal pressure is calculated from the data, and the air pressure adjustment actuator 47
0. The air pressure adjustment device 480 may be controlled.

[0052]Although the above embodiments have been described using low-pressure pneumatic tires as the wheels, the present invention is not limited thereto. It's okay.

[0053]

[Effects of the Invention] As explained above, according to the present invention,
You can easily carry heavy objects up the stairs.
In particular, it is possible to provide a stair-climbing vehicle for transporting cargo that can easily change direction at landings, etc., which have been difficult in the past, and transport heavy objects without bothering workers.

Further, according to the present invention, since the tires deformed when climbing stairs come into contact with the treads of the stairs over a wide area, there is also an effect that heavy objects can be transported without damaging the stairs.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the operation of a stair-climbing vehicle according to an embodiment on a landing; FIG. FIG. 2 is an explanatory diagram showing a state in which the driver stands up to change direction.

FIG. 2 is an explanatory diagram showing the structure of a luggage platform that is formed to be movable in the front-rear direction with respect to the vehicle body.

[Figure 3] Figure (A) is an explanatory diagram of a vehicle climbing stairs;
B) is an explanatory diagram of the vehicle immediately after climbing the stairs.

FIG. 4 is an explanatory diagram showing an example of reverse rotation prevention used in the climbing vehicle of the embodiment.

FIG. 5 is an explanatory diagram showing another example of reverse rotation prevention used in the vehicle of the embodiment.

FIG. 6 is a block circuit diagram showing main parts of a control circuit used in the vehicle of the embodiment.

FIG. 7 is an explanatory diagram of a conventional luggage carrier.

FIG. 8 is an explanatory diagram of a conventional stair-climbing vehicle for carrying luggage.

[Explanation of symbols]

30 Luggage 40 Vehicle body 42 Front drive wheel 44 Rear drive wheel 46 Auxiliary wheels 48, 52 Tire 70 Luggage platform 76 Ball screw 78 Motor 80 Screw screw 82 Support roller
PS004
901

Claims (3)

[Claims] [Claim 1] A stair-climbing vehicle for carrying luggage, which is configured to be able to load luggage on a luggage loading platform provided on the vehicle body and climb stairs using at least four driving wheels arranged at the front and rear of the vehicle body. The device includes a center-of-gravity moving means for moving the luggage platform to the rear of the vehicle body and standing the vehicle body rearward, and a support unit movably supporting the vehicle body that is erected rearward. A stair-climbing vehicle for carrying luggage, which stands up at the landing of the stairs and changes direction when climbing the stairway. 2. The stair-climbing vehicle for carrying luggage according to claim 1, further comprising auxiliary wheels provided between the front drive wheels and the rear drive wheels for movement between the stairs and the landing. 3. The stair-climbing vehicle for transporting luggage according to claim 1, wherein the driving wheels are deformable tires that deform according to the weight of loaded luggage.