JP2002347627A - Mobile carriage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce equipment cost and cost for workers by efficiently handling cargoes at a relay point of loading. SOLUTION: This mobile carriage 10 comprises a mounting plate 20 formed into a planar shape, a wheel 30 provided at each corner part 20 of the mounting plate 20, a driving mechanism 40 for rotating and driving the wheel 30, a steering mechanism 50 for changing the direction of the wheel 30, a transfer plate 60 which is provided at each of a pair of longitudinal edge parts 23 of the mounting plate 20 and is capable of changing an attitude between an inclined attitude for forming a slope between the transfer plate 60 and the mounting plate 20 by grounding on a floor F and an upright attitude released with the grounding, and an attitude changing mechanism 70 for performing an attitude change of the transfer plate 60.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-propelled trolley that carries a load and is self-propelled. The present invention relates to a self-propelled trolley suitably used for relaying luggage movement.

[0002]

2. Description of the Related Art In recent years, high-rise and large-capacity warehouses having a floor area of 10,000 m ² and a height of 45 m have emerged with the aim of increasing the efficiency of physical distribution. The unit weight of luggage handled in such large-scale, high-rise warehouses is relatively large, ranging from 2 to 3 tons, and they are handled by forklift trucks via pallets and distributed to each floor using elevators. Be removed from each floor. Therefore, it is not an exaggeration to say that the efficiency of cargo handling in a large-scale high-rise warehouse depends on the efficiency of use of the elevator.

An elevator for cargo handling installed in a large-scale high-rise warehouse has a "horizontal" type (horizontal elevator 100) having a wide frontage and a small depth as shown in FIG. , A vertically long type having a narrow frontage and a long depth as shown in FIG.
01). Either type of elevator 1
00, 101, the luggage 104 is lifted through the pallets using the forklift truck 103 to the elevators 100, 101.
Generally, so-called fork loading and unloading, which is loaded on the 101 or unloaded from the elevators 100 and 101, is used, but the manner of performing fork loading differs depending on the type of the elevators 100 and 101.

That is, in the case of the horizontal elevator 100,
As shown in FIG. 7A, the forklift truck 103 stays on the floor of the floor without loading the luggage 104 when loading and unloading the luggage 104, and expands and contracts only the fork, so that the forklift truck 103 The load 104 is loaded and unloaded.

On the other hand, in the case of the vertical elevator 101,
The forklift truck 103 has to get on and off the forklift truck 103 while holding the luggage 104 with a fork and get on and off the floor of the vertical elevator 101, and eventually the forklift truck 103 is loaded on the vertical elevator 101 from the maximum load capacity. Luggage 1 only the amount less the weight
04 cannot be placed on the vertical elevator 101.

[0006] For this reason, in a large-scale high-rise warehouse, a horizontally long elevator 100 capable of loading luggage 104 up to the vicinity of the maximum loading capacity is generally employed.

[0007]

However, even if the horizontal elevator 100 is employed in a large-scale high-rise warehouse,
When loading luggage 104 into the horizontal elevator 100 or unloading luggage 104 from the horizontal elevator 100, the forklift truck 103 must wait at the entrance of the elevator when the elevator reaches a predetermined floor. , Horizontal elevator 100 for each floor
It is necessary to always attach a forklift truck 103 dedicated to cargo handling, and the equipment cost (cost of the forklift truck 103) and personnel cost (cost of the operating staff of the forklift truck 103) increase, resulting in a large-scale high-rise warehouse. Was a bottleneck in running

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it has become possible to efficiently handle packages at a cargo handling relay point, thereby reducing equipment costs and manpower. It is an object of the present invention to provide a self-propelled truck capable of reducing costs.

[0009]

According to the first aspect of the present invention,
A mounting table formed in a flat plate shape, wheels provided at least at four corners of the mounting table, a driving mechanism for rotating and driving the wheels, and a steering mechanism for changing the direction of the wheels are provided.
The above mounting table has a connecting plate that can change its posture between an inclined position in which a slope is formed between the mounting table and the mounting table, a ground release position in which the ground is released, and a changing position of the connecting plate. And a posture changing mechanism for performing the following.

According to this invention, the self-propelled carriage moves by the rotation of the wheels by driving the drive mechanism in a state where the connecting plate is set to the ground release posture, and the moving direction is changed by the steering of the steering mechanism. Be changed. Then, in a state where the self-propelled bogie is stopped, by changing the attitude of the connecting board set to the ground release attitude by operating the attitude changing mechanism to the grounding attitude, the connecting board is moved between the mounting table and the floor by the connecting board. Since the slope is formed, a working machine such as a forklift truck holding the load can be put on and off the mounting table via the slope.

[0011] Therefore, by using a self-propelled vehicle having a mounting table having such a wide mounting surface at, for example, a luggage transfer relay site such as an entrance of an elevator of a large-scale high-rise warehouse, an elevator of each floor can be used. Eliminates the need to place work machines for loading and unloading luggage to elevators at the entrances and exits, and the work machines can be used for multiple purposes by loading and unloading the self-propelled trolleys at any time. It becomes possible to do.

When the mounting table is full of luggage, the self-propelled vehicle can be self-propelled and the luggage can be immediately loaded on the elevator, and the luggage can be temporarily stored on the predetermined floor by the self-propelled vehicle. Can be taken off the elevator,
Since there is no need to wait for the elevator, the efficiency of transshipment at the relay point of luggage is greatly improved, and there is no need to attach a work machine to each relay point, reducing equipment and personnel costs. After that, the work machine can be effectively used for multiple purposes.

According to a second aspect of the present invention, in the first aspect of the present invention, the mounting table includes a vertical edge portion and a horizontal edge portion longer than the vertical edge portion, and the rectangular shape is horizontally long in plan view. And the drive mechanism is provided for each wheel provided on one lateral edge of the mounting table.

According to the present invention, since the mounting table is formed in a horizontally long rectangular shape, for example, when a self-propelled vehicle is applied to a large-scale high-rise warehouse, a so-called horizontally long elevator having a wide frontage and a small depth is used. The self-propelled bogie can be mounted efficiently, and each wheel (drive wheel) provided on one side edge of the mounting table is driven to extend the longitudinal edge of the self-propelled bogie. The movement of the self-propelled bogie is easily and stably and reliably performed, whereby the operation of getting on and off the self-propelled carriage with respect to the horizontally long elevator is facilitated.

According to a third aspect of the present invention, in the first aspect of the present invention, the mounting table includes a vertical edge portion and a horizontal edge portion longer than the vertical edge portion. And the driving mechanism is provided for all of the four corner wheels of the mounting table.

According to this invention, all the wheels provided at the four corners of the mounting table are driven by the driving mechanism while ensuring the operation and effect of the invention of claim 2, so that the traversing and vertical movement of the self-propelled vehicle can be achieved. Both of the lines are performed stably and reliably, and traveling in the vertical and horizontal directions other than getting on and off the horizontal elevator of the self-propelled bogie is performed stably.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the driving mechanism is provided on a lower surface side of the mounting table, and the steering mechanism and the attitude changing mechanism are both provided. It is characterized in that it is provided at a corner on the upper surface side of the mounting table.

According to the present invention, the drive mechanism is provided on the lower surface side of the mounting table, and the steering mechanism and the attitude changing mechanism are provided at the corner on the upper surface side of the mounting table.
A large space for loading luggage is secured in the center of the mounting table.

According to a fifth aspect of the present invention, in the first aspect of the present invention, a wheel is provided at a central portion of each lateral edge of the mounting table. is there.

According to the present invention, downward bending of the center of the mounting table is prevented by the wheels provided at the center of the mounting table.

[0021]

1 and 2 are perspective views showing one embodiment of a self-propelled vehicle according to the present invention. FIG. 1 is a view showing a state in which a connecting plate is set in an inclined position. Reference numeral 2 denotes a state in which the connecting plate is set in the upright posture (ground release posture). FIG. 3 is a front view of the self-propelled carriage.

As shown in these figures, the self-propelled vehicle 10
Is placed at a relay position of the transport route of the load, and is a mounting table 20 formed of a flat plate having a horizontally long rectangular shape in plan view, and each corner 21 and each horizontal edge 2 of the mounting table 20.
2, a wheel 30 provided at a central position, a drive mechanism 40 for rotating and driving the wheel 30, a steering mechanism 50 for changing the direction of the wheel 30, and a transfer provided on the vertical edge 23 of the mounting table 20. It has a basic configuration including a plate 60 and a posture changing mechanism 70 for changing the posture of the connecting plate 60.

The mounting table 20 is for mounting the load 104 (FIG. 3). A large load space for mounting the load 104 is secured at the center position. The steering mechanism 50 is provided on the upper surface side, and the drive mechanism 40 for driving the wheels 30 is provided on the lower surface side. A driven wheel 30 ′ is provided at a center position of each lateral edge 22 of the mounting table 20. The drive mechanism 40 is not provided for the driven wheel 30 ', but the steering mechanism 50 is provided. The driven wheels 30 ′ are provided to prevent the central portion of the wide mounting table 20 from being bent downward by the loaded luggage 104.

A notch 24 formed by cutting the center of the vertical edge 23 of the mounting table 20 into a U-shape.
The steering mechanism installation shelf 25 for disposing the steering mechanism 50 is formed on both sides of the notch 24 so as to project outward.

The connecting plate 60 is for allowing a forklift to get on and off the mounting table 20. The steering mechanism is driven by a posture changing mechanism 70 with its base end fitted into the notch 24. As shown in FIG. 1, which rotates forward and backward around a support shaft 61 provided between the installation shelves 25 and is in contact with the floor F and is inclined, as shown in FIG. Upright posture (ground release posture)
The posture can be changed between and.

It should be noted that the upright posture is adopted as the ground release posture of the connecting plate 60, otherwise the self-propelled vehicle 1
At the time of traveling 0, the connecting plate 60 protrudes outside from the mounting table 20 to obstruct the traveling, and it becomes impossible to get into the elevator (horizontal elevator 100 (see FIG. 3)). However, such a disadvantage is prevented. This is to ensure smooth running and getting into the horizontally long elevator 100.

The wheel 30 and the driving mechanism 40 for driving the wheel 30 are both mounted on a rotating plate 26 which is rotatably supported on a rotating shaft 27, which will be described later, below the steering mechanism installation shelf 25. Have been. Especially the drive mechanism 40
Is provided on the lower surface side of the rotating plate 26, and the drive mechanism 40 does not interfere with the steering mechanism
The degree of freedom of changing the traveling direction of 0 is increased.

A power unit 80 is provided at an appropriate position of the mounting table 20 (in the example shown in FIG. 1, near the steering mechanism installation shelf 25 on the front left side), and a joystick is provided adjacent to the power unit 80. A handle 90 is provided. In the vicinity of the pair of left and right connecting plates 60, an operation rod 95 for performing an operation of changing the attitude of the connecting plate 60 is provided.

The power unit 80 includes a power supply unit 81 containing a battery and a hydraulic unit 82 containing a hydraulic unit that sends out hydraulic oil. Such a power unit 8
0 is a joystick handle 90 and an operation stick 9
A control device 83 that converts the operation of No. 5 into a control signal and outputs it to the power supply device 81 and the hydraulic device 82 is also provided.

The joystick handle 90 includes a joystick rod 91 and a steering handle 92 provided on the top of the joystick rod 91.
It is comprised including. Then, electric power proportional to the tilt angle by the tilt operation of the joystick rod 91 is supplied from the power supply device 81 to the drive mechanism 40 via the control device 83. Therefore, by adjusting the tilt angle of the joystick rod 91, the self-propelled vehicle 10
Will be adjusted.

When the steering handle 92 is turned, an operation signal is transmitted to the steering mechanism 50 via the control device 83, and the driving of the steering mechanism 50 causes the wheels 30 to turn to the amount of rotation of the steering handle 92. The self-propelled vehicle 10 is turned by a turning radius corresponding to the operation amount of the steering handle 92 by changing the direction by the corresponding amount.

The operating direction of the operating rod 95 is the connecting plate 6
The rotation direction coincides with the zero rotation direction so that an operation error does not occur. By operating the operation rod 95, the connection plate 60 changes its posture between an inclined posture in which the leading end edge is in contact with the floor F and an upright posture in which it stands on the mounting table 20.

FIG. 4 is an exploded perspective view, partly cut away, showing one embodiment of the rotating plate 26, the drive mechanism 40 and the steering mechanism 50. FIG. 5 is an assembled perspective view thereof.
(A) shows a state in which the wheel 30 is oriented vertically, and (B) shows a state in which the wheel 30 is oriented horizontally.

The rotating plate 26 is formed of a long plate in the vertical direction (the direction in which the vertical edge 23 of the mounting table 20 extends), and is formed in the horizontal direction (the direction in which the horizontal edge 22 of the mounting table 20 extends). It has a vertically extending wheel support plate 26a protruding downward from the lower surface side of the central portion. An axle 31 is provided through the wheel support plate 26a, and one wheel 30 is provided on the axle 31 with the wheel support plate 26a interposed therebetween.

On the upper surface side of the rotating plate 26, a rotating shaft 27 integral with the rotating plate 26 is provided so as to protrude upward. The turning shaft 27 is provided at a position directly above the wheel support plate 26 a and at a position where the axis of the turning shaft 27 coincides with a vertical line orthogonal to the axis of the axle 31. .
Therefore, when the rotation shaft 27 rotates around its axis, the wheel 30 rotates around the rotation shaft 27 via the rotation plate 26 and the wheel support plate 26a, and changes direction.

On the other hand, in the steering mechanism installation shelf 25 of the mounting table 20, a penetration hole 25a is formed at a position corresponding to the rotation shaft 27 for allowing the rotation shaft 27 to penetrate. A radial bearing 25b through which the rotating shaft 27 can be inserted in close contact with the penetration hole 25a is fitted. In addition, a thrust bearing 27a is fitted on the rotating shaft 27 in a close contact state. Therefore, when the rotating shaft 27 is inserted through the radial bearing 25b, the rotating plate 26 is rotated by the action of the bearings 25b and 27a while being connected to the steering mechanism installation shelf 25 via the rotating shaft 27. It is possible to smoothly rotate around the driving shaft 27.

Next, the driving mechanism 4 will be described with reference to FIGS.
0 will be described. As shown in these figures, the driving mechanism 40 includes a driving motor 41 fixed to the lower surface of the rotating plate 26 by bolts, and a driving motor 41 concentrically fixed to a driving shaft 41 a of the driving motor 41. Sprocket 42
And a driven sprocket 43 concentrically fixed to the axle 31, and an endless chain 44 stretched between the sprockets 42, 43.

The traveling drive motor 41 is disposed in parallel with the axle 31, so that the traveling drive motor 41 and the drive sprocket 42 are located on the same plane, and the endless chain is easily located between the two sprockets 42 and 43. 44 can be installed. The driving sprocket 42 includes:
The size is set smaller than the driven sprocket 43.
Therefore, the drive rotation of the drive shaft 41a is transmitted to the driven sprocket 43 in a decelerated state.

The rotation direction of the wheel 30 is made different depending on the tilt direction of the joystick rod 91. In the example shown in FIG. 1, the joystick rod 91 is moved forward (to the left in the direction in which the vertical edge 23 extends). When the joystick rod 91 is tilted backward, the wheels 30 rotate clockwise around the axle 31 while the joystick rod 91 is tilted backward. The rotation speed of the wheel 30 is
Since it is proportional to the amount of tilt of the joystick rod 91,
The traveling speed of the self-propelled carriage 10 is controlled by adjusting the amount of tilt.

According to the drive mechanism 40, a drive signal is output from the control device 83 to the travel drive motor 41 by tilting the upright joystick rod 91 (FIG. 1) in a predetermined direction. The driving sprocket 42 is rotated by the driving of the driving motor 41 through the driving shaft 41a.
The self-propelled vehicle 10 travels by rotating the wheels 30 in a predetermined direction by transmitting the rotation of the driven sprocket 43 to the wheels 30 via the axle 31.

When the tilted joystick rod 91 is returned to the original upright position (neutral position), the rotation of the wheels 30 is stopped, and the self-propelled carriage 10 stops. In addition, the self-propelled trolley 10 has an unillustrated brake structure interlocked with the joystick rod 91,
When the joystick rod 91 is returned to the neutral position, the brake structure operates to apply a brake.

Next, the steering mechanism 5 will be described with reference to FIGS.
0 will be described. The steering mechanism 50 includes a steering drive motor 51 fixed to the steering mechanism installation shelf 25 with bolts.
A drive-side bevel gear 52 concentrically fixed to a drive shaft 51a of the steering drive motor 51;
And the driven-side bevel gear 53 meshing with. The driven side bevel gear 53 is dimensioned to have a considerably larger diameter than the drive side bevel gear 52, whereby the rotation of the drive shaft 51a is transmitted to the rotation of the rotary shaft 27 in a substantially reduced state. .

In the driven side bevel gear 53, the rotating shaft 27 of the rotating plate 26 is connected to the radial bearing 2 of the steering mechanism installation shelf 25.
5b, it is fitted around the rotation shaft 27 so as to be able to co-rotate therewith, whereby the rotation of the driven side bevel gear 53 is transmitted to the rotation plate 26 via the rotation shaft 27. I have.

The steering drive motor 51 is fixed to the steering mechanism installation shelf 25, and the rotating plate 26 is driven by the driven side bevel gear 53.
In a state where the steering mechanism 50 is connected to the steering mechanism installation shelf 25 via the rotation shaft 27, the steering mechanism 50 is covered with a cover 54 and fixed to the steering mechanism installation shelf 25 by bolts. By doing so, it is possible to avoid an accident in which the worker or the load 104 hits the movable part on the mounting table 20, and the movable part of the steering mechanism 50 is protected by the cover 54.

According to the steering mechanism 50, by turning the steering handle 92 around the joystick rod 91 from the neutral position in a predetermined direction, the turning operation is performed as a control signal via the power supply 81 as a control signal. The steering drive motor 51 is transmitted to the drive motor 51, and the steering drive motor 51 is rotationally driven by an amount corresponding to the rotation operation amount. The rotational drive of the steering drive motor 51 is transmitted to the rotation shaft 27 via the drive shaft 51a and the drive side bevel gear 52, and the rotation of the rotation plate 26 with the rotation shaft 27 thereby causes the wheels 3 to rotate.
The direction of 0 is changed, and the self-propelled trolley 10 turns.

FIG. 5B shows a state in which the wheel 30 has been turned to the direction in which the lateral edge 22 extends, but in this state, the turning radius becomes infinite and the self-turning radius becomes infinite. The trolley 10 moves in the crab (moves in the lateral direction) without turning.

FIGS. 6A and 6B are cross-sectional views of the self-propelled vehicle 10 for explaining the attitude changing mechanism 70 for changing the attitude of the connecting plate 60. FIG. (B) shows a state in which the connecting plate 60 is set in the upright posture.

First, the connecting plate 60 is, as shown in FIG.
The base end 62 (the right side in FIG. 6) is provided between the pair of steering mechanism installation shelves 25 (FIG. 2) of the respective vertical edges 23 (FIG. 2).
The shaft 63 is rotatably supported by one turn, and its tip 63 can be changed between an inclined posture in which the front end 63 is in contact with the floor F and inclined, and an upright posture standing on the support shaft 61. The connecting plate 60 is set in the inclined position,
The width dimension is set so that the inclination angle formed between the floor F and the floor F is approximately 30 °.

The attitude changing mechanism 70 changes the attitude of the connecting plate 60 as described above. The attitude changing mechanism 70 is disposed on the back surface of the mounting table 20 in parallel with the lateral edge 22. It is composed of a cylinder device 71 and an operation arm 74 that is operated by driving the cylinder device 71 and that is projected obliquely from the back side of the base end portion 62 of the connecting plate 60.

The operating arm 74 is mounted on the connecting plate 60 so that the angle formed between the operating arm 74 and the connecting plate 60 is approximately 120 °, whereby the connecting plate 60 is set in the inclined position. In a state where the connecting plate 60 is set in an upright posture while the connecting plate 60 is in a state in which the connecting plate 60 is inclined downward toward the right side as shown in FIG.
As shown in (b) of FIG. 6, the state is such that it is inclined leftward and downward.

The cylinder device 71 includes a hydraulic cylinder 72 fixed to the mounting table 20, and a piston rod 73 projecting from the hydraulic cylinder 72 toward the operation arm 74.
It consists of When the hydraulic cylinder 72 receives the hydraulic pressure from the hydraulic device 82 (FIG. 1), the piston rod 73 advances and retreats according to the direction of the hydraulic pressure.
Then, the hydraulic device 82 drives forward and reverse based on a control signal from the control device 83 by operating the operation rod 95,
A predetermined hydraulic pressure is sent to the hydraulic cylinder 72.

At the tip of the piston rod 73, a connecting member 73a having a U-shape in a plan view is provided.
3a, the operation arm 74 has a connection pin 73b provided between the opposing sides thereof.
A long hole 74a extending in the longitudinal direction into which b is fitted in a sliding contact state
have. The piston rod 73 is connected to the operation arm 74 by fitting the connection pin 73b into the long hole 74a.

According to the posture changing mechanism 70, as shown in FIG. 6A, with the operating rod 95 tilted to the left, the end of the piston rod 73 enters the hydraulic cylinder 72. When the operation arm 74 is inclined forward and downward toward the right by the pulling by the connection pin 73b, the connecting plate 60 is set in the inclined position in which the distal end portion 63 thereof is in contact with the floor F. . In this state,
The forklift truck 103 (FIG. 3) that lifts the load 104 via the pallet 105 goes up and down the slope of the connecting plate 60.

Next, in the state shown in FIG. 6A, the operation rod 95 is rotated clockwise around the base end thereof and tilted rightward as shown in FIG. 6B. This operation is input to the control device 83 as an operation signal, and a control signal is output from the control device 83 to the hydraulic device 82, whereby the hydraulic pressure from the hydraulic device 82 is supplied to the hydraulic cylinder 72. The supply of the hydraulic pressure causes the piston rod 73 to protrude from the hydraulic cylinder 72, and the connection pin 73b at the tip of the piston rod 73 to press the operation arm 74, so that the operation arm 74 rotates clockwise around the support shaft 61 and is supported. The posture is set to an upright posture protruding upward from the shaft 61.

Conversely, when changing the connecting plate 60 that has been set to the upright posture to the inclined posture, the operation rod 95 that is tilted to the right may be tilted to the left. By doing so, the protruding piston rod 73 is retracted toward the hydraulic cylinder 72, and the connecting plate 60 is rotated counterclockwise around the support shaft 61 of the operation arm 74 via the connection pin 73b. The tilt posture is set.

In this embodiment, if the operation of the operation rod 95 is stopped during the operation, the operation stop is input to the control device 83 as an operation signal, and the control device 8 is stopped.
Numeral 3 outputs a control signal to the hydraulic device 82 to stop the flow of hydraulic oil in the hydraulic circuit. Therefore, by stopping the operation of the operation rod 95 halfway, the connecting plate 6 is stopped.
0 means that the angle corresponding to the operation angle is maintained.

As described in detail above, the self-propelled truck 1 of the present invention
Reference numeral 0 denotes a mounting table 20 formed in a flat plate shape and the mounting table 2
0, provided at each corner 21 of the vehicle,
, A steering mechanism 50 for changing the direction of the wheels 30, and a slope provided between the mounting table 20 and the floor F provided on the pair of vertical edges 23 of the mounting table 20. And a connecting plate 60 capable of changing the posture between an inclined posture that forms a vertical position and an upright posture where the ground contact is released, and a posture changing mechanism 70 that changes the posture of the connecting plate 60. .

Therefore, by driving the drive mechanism 40 in a state where the connecting plate 60 is set in the upright posture, the self-propelled carriage 10 moves by the rotation of the wheels 30, and the moving direction is changed by operating the steering mechanism 50. Can be changed. Then, with the self-propelled carriage 10 stopped, the posture changing mechanism 70
By changing the posture of the connecting plate 60 set in the upright posture to the grounding posture by the operation of the above, a slope is formed by the connecting plate 60 between the mounting table 20 and the floor F. A working machine such as a forklift truck 103 that lifts the luggage 104 can get on and off the mounting table 20 via the slope.

Therefore, by using the self-propelled vehicle 10 having the mounting table 20 having such a wide mounting surface at, for example, a luggage transfer relay point such as a doorway of a horizontally long elevator 100 of a large-scale high-rise warehouse, Horizontal elevator 1 on each floor
Luggage 10 for the horizontal elevator 100 at the doorway of 00
It is not necessary to arrange the forklift trucks 103 for loading and unloading the forklift trucks 4 by sticking, and the forklift trucks 103 can be used for the multipurpose by loading and unloading the self-propelled trolleys 10 at any time. Can be.

When the mounting table 20 is full of the luggage 104, the self-propelled vehicle 10 can be driven by itself, and the luggage 104 can be immediately loaded on the horizontal elevator 100. The luggage 104 can be unloaded from the horizontal elevator 100 at a time by self-propelled,
Since there is no need to make the horizontal elevator 100 wait,
It is possible to greatly improve the efficiency of transshipment of the luggage 104 at the luggage relay point, and it is not necessary to attach the forklift truck 103 to each luggage point, so that the facility cost and the personnel cost can be significantly reduced.

The mounting table 20 is formed in a rectangular shape which is horizontally long in plan view and has a vertical edge 23 and a horizontal edge 22 longer than the vertical edge 23. Luggage 1 formed in a horizontally long rectangular shape and usually packed in a rectangular parallelepiped shape
For example, when the self-propelled trolley 10 is applied to a large-scale high-rise warehouse, the self-propelled trolley 10 can be mounted on a horizontally-oriented elevator 100 that can efficiently carry out cargo handling. Can be adapted.

Further, by providing the driving mechanism 40 at each corner 21 so as to drive all the wheels 30 provided at each corner 21 of the mounting table 20, the mounting table 20
This is a so-called four-wheel drive in which 0 is a drive wheel, and the vehicle can run stably.

Since the driving mechanism 40 is provided on the lower surface of the rotating plate 26 provided on the lower surface of the mounting table 20, the driving motor of the driving mechanism 40 can be driven by changing the direction of the wheels 30 by steering. 41 and the like do not interfere with the mounting table 20, and the direction change range of the wheels 30 can be widened. On the other hand, since the steering mechanism 50 and the posture changing mechanism 70 are provided at the corners on the upper surface side of the mounting table 20, a large space for loading the luggage 104 is secured in the center of the mounting table 20, and The driving operation of the carriage 10 can be facilitated.

Further, since the driven wheel 30 'is provided at the center of each lateral edge 22 of the mounting table 20, the driven wheel 3'
By 0 ', the downward bending of the central portion of the wide mounting table 20 can be effectively prevented.

The present invention is not limited to the above embodiment, but includes the following contents.

(1) In the above embodiment, the driving mechanism 4 is provided for all the wheels 30 provided at the four corners 21 of the mounting table 20 via the rotating plate 26.
0 is provided, but the present invention is not limited to providing the drive mechanism 40 for all the wheels 30 in the four corners 21, but is provided in each corner 21 of one side edge 22. The drive mechanism 40 may be provided for the wheel 30 provided, or the drive mechanism 40 may be provided for the wheel 30 provided at each corner 21 of the one vertical edge 23.

(2) In the above embodiment, the posture changing mechanism 70 is provided with the cylinder device 71 and the hydraulic cylinder 72 driven by the hydraulic pressure from the hydraulic device 82. Change mechanism 70
Is not limited to those driven by a hydraulic mechanism,
It may be driven by an electric motor.

(3) In the above embodiment, the connecting plate 60 is provided on the vertical edge 23 of the mounting table 20.
Instead, the connecting plate 60 may be provided on the side of the lateral edge portion 22 or on both sides.

(4) In the above embodiment, the driven wheel 30 ′ is provided at the central position of the lateral edge 22 of the mounting table 20. It is not limited to providing the driven wheels 30 'at the position. For example, when the mounting table 20 is small, the driven wheels 30' may not be provided.

(5) In the above embodiment, the self-propelled trolley 10 is used for relaying and transferring the luggage 104. However, in the present invention, the self-propelled trolley 10 is used for relaying and transferring the luggage 104. The present invention is not limited to this, and may be used for relay transportation of automobiles. By doing so, each floor of the large-scale high-rise warehouse can be used as a parking lot.

[0071]

According to the first aspect of the present invention, a self-propelled vehicle having a mounting table having a wide mounting surface is used at a transfer point of luggage transfer such as an entrance of an elevator of a large-scale high-rise warehouse. This eliminates the need for a work machine for loading and unloading luggage to the elevator at the entrance of the elevator on each floor, and eliminates the need to place the work machine on the self-propelled trolley at any time. The working machine can be used for multiple purposes.

When the mounting table is full of luggage, the self-propelled vehicle can be self-propelled and the luggage can be immediately loaded on the elevator. Can be taken off the elevator,
Since there is no need to wait for the elevator, the efficiency of transshipment at the relay point of luggage is greatly improved, and there is no need to attach a work machine to each relay point, reducing equipment and personnel costs. After that, the work machine can be effectively used for multiple purposes.

According to the second aspect of the present invention, since the mounting table is formed in a horizontally long rectangular shape, for example, when a self-propelled vehicle is applied to a large-scale high-rise warehouse, a so-called wide and narrow depth is used. After enabling efficient mounting of the self-propelled truck on the horizontally long elevator, driving each wheel (drive wheel) provided on one lateral edge of the mounting table allows the vertical edge of the self-propelled truck to be mounted. The movement in the extending direction is performed stably and reliably,
Thereby, the operation of getting on and off the self-propelled trolley for the horizontally long elevator can be easily performed.

According to the third aspect of the present invention, the mounting table is
A vertical edge portion and a horizontal edge portion longer than the vertical edge portion are formed into a horizontally long rectangular shape in a plan view, and the drive mechanism is provided for all the wheels at the four corners of the mounting table. After securing the operation and effect of the invention of Item 2, all the wheels provided at the four corners of the mounting table are driven by the drive mechanism, so that both the traverse and the traverse of the self-propelled vehicle are stably and reliably performed. The self-propelled vehicle can be run vertically and horizontally in a stable state other than when the self-propelled vehicle gets on and off the horizontally long elevator.

According to the fourth aspect of the present invention, the drive mechanism is provided on the lower surface side of the mounting table, and the steering mechanism and the attitude changing mechanism are provided at the corner on the upper surface side of the mounting table. It is possible to secure a large space for placing luggage in the center of the mounting table.

According to the fifth aspect of the present invention, since the wheels are also provided at the center of each lateral edge of the mounting table, the wheels can effectively prevent downward bending of the center of the mounting table. it can.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a self-propelled carriage according to the present invention, and shows a state in which a connecting plate is set in an inclined posture.

FIG. 2 is a perspective view showing one embodiment of the self-propelled carriage according to the present invention, and shows a state in which a connecting plate is set in an upright posture.

FIG. 3 is a front view of the self-propelled carriage shown in FIG.

FIG. 4 is an exploded perspective view, partly cut away, showing an embodiment of a turning plate, a driving mechanism and a steering mechanism.

5 is an assembled perspective view of the drive mechanism and the steering mechanism of FIG. 4, wherein (a) shows a state in which wheels are oriented in a vertical direction, and (b) shows a state in which wheels are oriented in a lateral direction.

FIG. 6 is a cross-sectional view of the self-propelled bogie in a side view for explaining a posture changing mechanism for changing the posture of the connecting plate, wherein (a) shows a state in which the connecting plate is set to the inclined position; (B) shows a state in which the connecting plate is set in the upright posture.

FIGS. 7A and 7B are plan views for explaining conventional forklift loading and unloading for an elevator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Self-propelled trolley 20 Mounting table 21 Corner 22 Side edge 23 Vertical edge 24 Notch 25a Penetration hole 25b Radial bearing 25 Steering mechanism installation shelf 26 Rotating plate 26a Wheel support plate 27 Rotating shaft 27a Thrust bearing 30 Wheel 30 'driven wheel 31 axle 40 drive mechanism 41a drive shaft 41 traveling drive motor 42 drive sprocket 43 driven sprocket 44 endless chain 50 steering mechanism 51 steering drive motor 51a drive shaft 52 drive bevel gear 53 driven bevel gear 54 cover 60 Transfer plate 61 Support shaft 62 Base end 63 Tip end 70 Posture changing mechanism 71 Cylinder device 72 Hydraulic cylinder 73 Piston rod 73a Connection member 73b Connection pin 74 Operation arm 74a Long hole 80 Power device 81 Power supply device 82 Hydraulic device 83 Control device 90 Lee stick handle 91 joystick rod 92 steering wheel 95 operating rod 100 horizontally elevator 101 Vertical elevator 103 Forklift 104 luggage 105 pallets F Floor

Claims (5)

[Claims] 1. A mounting table formed in a flat plate shape, wheels provided at at least four corners of the mounting table, a driving mechanism for rotating and driving the wheels, and a steering mechanism for changing the direction of the wheels. The above-mentioned mounting table has a connecting plate which can be changed between an inclined position in which a ground is formed to form a slope with the mounting table and a ground releasing position in which the ground is released, and a connecting plate position. A self-propelled carriage provided with a posture changing mechanism for performing a change. 2. The mounting table according to claim 1, wherein the mounting table includes a vertical edge portion and a horizontal edge portion longer than the vertical edge portion, and is formed in a rectangular shape that is horizontally long in a plan view. The self-propelled vehicle according to claim 1, wherein the self-propelled vehicle is provided for each wheel provided on a lateral edge portion. 3. The mounting table according to claim 1, wherein the mounting table includes a vertical edge portion and a horizontal edge portion longer than the vertical edge portion, and is formed in a rectangular shape that is horizontally long in a plan view. The self-propelled vehicle according to claim 1, wherein the vehicle is provided for all of the wheels. 4. The apparatus according to claim 1, wherein the driving mechanism is provided on a lower surface side of the mounting table, and the steering mechanism and the posture changing mechanism are both provided at corners on an upper surface side of the mounting table. The self-propelled vehicle according to any one of Items 1 to 3. 5. The self-propelled vehicle according to claim 3, wherein a wheel is provided at a center of each lateral edge of the mounting table.