JPH0891798A - Working control system for forklift truck - Google Patents

Abstract

PURPOSE: To raise a lift device to a specified height and tilt it to a specified inclination automatically during loading and unloading works so as to facilitate the works. CONSTITUTION: The height data and inclination data for each shelf of a storing body are stored in a physical distribution control computer, and the data is received by an on vehicle controller 5 mounted on a fork lifttruck body. In the CPU13 of the on vehicle controller 5, a control valve 20 to operate a lift cylinder 16 and a control valve 21 to operate a tilt cylinder 17 are controlled based on the data so as to raise a lift device to a specified shelf height and tilt it to a specified shelf inclination.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work control system for a forklift truck for carrying out a work of loading and unloading a forklift truck on a storage body having a plurality of partitioned shelves.

[0002]

2. Description of the Related Art Conventionally, as a work control system for a forklift truck, which uses a forklift truck to carry out unloading and placing work on a container having a plurality of divided shelves, physical distribution management for managing the work is performed. The physical distribution management computer stores work content data such as where to carry out the work of picking up or where to carry out the work of carrying out from among the plurality of shelves of the storage body. On the other hand, the body of the forklift truck is equipped with a display unit for receiving the work content data stored in the physical distribution management computer by a wireless system and displaying the work content data. The worker can display the work content data displayed on this display unit. Based on the above, a forklift truck is run and the lift device is operated by operating the lift lever and the tilt lever to perform the work of picking up and placing the load on each shelf of the storage body.

In the work control system for a forklift truck described above, an on-vehicle controller is mounted on the vehicle body of the forklift truck, and in the on-vehicle controller, for example, the first shelf, the second shelf, and the third shelf in the storage body are mounted. The height of each stage such as the eye rack is stored as data. Then, when the operator selects and operates a desired height set value from a plurality of height set values, the lift is lifted and the lift moves to a desired height based on the stored data. It is also known that it will be possible.

[0004]

In the conventional work control system for a forklift truck, the operator operates the lift lever or the tilt lever based on the work content displayed on the display unit to operate the lift device to store the work. Since the loading and unloading work of the body is carried out on each shelf, the lift-lifting position and the tilt tilt angle during the work are determined by the operation of the respective levers of the operator. For this reason, the worker is required to have high skill. In particular, when working on high shelves, there is a problem in that even a skilled worker can significantly reduce work efficiency due to visibility and the like.

Further, in the vehicle controller in which the height of each stage of the storage body is stored as data and the lift is lifted based on the data, the operator judges the lift lifting position, It is necessary to select and operate a desired height setting value from among the height setting values, which requires a little time and labor and may cause an erroneous operation by an operator. The present invention aims to solve these problems.

[0006]

Means for Solving the Problems A distribution management computer is provided for managing a pallet picking and placing work by a forklift truck on a storage body having a plurality of partitioned shelves,
In a work control system for a forklift truck, in which a worker operates a forklift truck based on data from the physical distribution management computer to perform a desired work, an input from a keyboard on the physical distribution management computer or a vehicle body of the forklift truck is performed. By receiving the attitude data (lift lift and tilt tilt) of the vehicle from the mounted in-vehicle controller, the height data and tilt data of each shelf of the storage body are stored, and each of these data is stored in the forklift truck. The on-vehicle controller mounted on the vehicle body receives the data, and the on-vehicle controller controls the lift height and tilt tilt in the lift device of the forklift truck based on each data.

[0007]

[Operation] The physical distribution management computer stores the height data and tilt data of each shelf of the storage body, and the in-vehicle controller controls the lift height and tilt tilt of the lift device based on these data. By doing
The lift is automatically lifted to a predetermined height, and the tilt can be automatically tilted to a predetermined inclination, which facilitates the work.

[0008]

EXAMPLE An example of the work control system for a forklift truck according to the present invention will be described. As shown in FIG. 1, a plurality of shelves 1 each having a plurality of shelves 1 capable of accommodating partitioned loads are arranged in parallel in the vertical and front and rear directions, and each shelves 1 of the plurality of shelving bodies 2 are installed. Then, the forklift truck 3 is used to perform the unloading and placing work. Further, a physical distribution management computer 4 for managing the unloading and placing work of the forklift truck 3 is installed. On the other hand, the vehicle body of the forklift truck 3 is equipped with an in-vehicle computer 5 that exchanges data with the physical distribution management computer 4 wirelessly and controls the lift device of the forklift truck 3 based on this data. There is.

[0012] Next, the individual will be described in detail.
As shown in FIG. 2, the physical distribution management computer 4 is composed of a computer main body 7 having a built-in memory unit 6, an input / output terminal 8 and an interface 9, and a wireless device 10 provided outside. In the physical distribution management computer 4, work content data, such as where to carry out the work of picking up or where to carry out the work of loading, from each of the shelves 1 of the plurality of storage bodies 2, is input from the input / output terminal 8 to the computer main body. 7 in the memory unit 6. Further, the height data and inclination data of each shelf 1 of the plurality of storage bodies 2 are input from the input / output terminal 8 and stored in the memory section 6 of the computer main body 7. This is numbered in each of the plurality of storage bodies 2, such as A1 and A2, and each shelf 1 of each storage body 2 is also numbered, for example, one from the front side of the first stage. The first rack 1 is 11, the second rack 1 from the front side of the third row is 32, and so on. The height data and the tilt data of each shelf 1 are stored in the memory unit 6 of the computer main body 7 for each number assigned to each shelf 1. Then, the physical distribution management computer 4 outputs the work content data stored in the memory unit 6 of the computer main body 7 via the interface 9 and the radio device 10, and the height data of the shelf 1 corresponding to the work content. And inclination data are output via the interface 9 and the wireless device 10.

On the other hand, as shown in FIG. 3, the in-vehicle controller 5 includes a RAM 11, a ROM 12, a CPU 13 for executing a program, an operation amount of a lift lever 14 and an operation amount of a tilt lever 15, and a lift cylinder 16 from a lift sensor 35. And the amount of movement of the tilt cylinder 17 from the tilt angle sensor 34 are input as analog signals, converted into digital signals, and output to the CPU 13.
8. D / A converter 19 for converting a digital signal processed by the CPU 13 into an analog signal and outputting the analog signal, CPU 1
A control valve 20 for operating the lift cylinder 16 or a control valve 21 for operating the tilt cylinder 17 by outputting a current in proportion to the command from 3 (output of the D / A converter 19).
A constant current amplifier 22 for controlling the computer, an interface 24 interposed between the CPU 13 and a wireless device 23 provided outside for communicating with the wireless device 10 on the physical distribution management computer 4 side, display of work contents provided outside, etc. The data from the interface 26 interposed between the display / operation unit 25 and the CPU 13 for performing the operation, the lift automatic trigger switch 27 attached to the lift lever 14 and the tilt automatic trigger switch 28 attached to the tilt lever 15 are displayed. CPU
The interface 29 for transmitting to each of the devices 13 is provided.

As shown in FIG. 4, the display operation section 25 is provided with a loading lamp 30 that blinks when the work content is unloading, and a loading lamp 31 that blinks when the work is unloading. , A data presence / absence lamp 32 for displaying the presence / absence of data (height, inclination) of the shelf 1 corresponding to the work content at each work, and a display unit for displaying the number of the shelf 1 corresponding to the work content 33 are provided respectively.

Further, the automatic trigger switch for lift 2
7 and the automatic trigger switch for tilt 28 are push-button switches provided on the upper ends of the lift lever 14 and the tilt lever 15, respectively, as shown in FIG.
By pressing this, the CPU 13 controls the lift height or tilt tilt of the lift device based on the data stored in the physical distribution management computer 4,
If the switch is not pressed, normal lift height or tilt tilt can be performed.

In the in-vehicle controller 5 thus configured, the work content data, the height data of the shelf 1, and the inclination data are input from the physical distribution management computer 4 to the CPU 13 via the radio 23 and the interface 24, and the CP
Display operation unit 2 from U13 via interface 26
A signal is output to 5, and the display operation unit 25 displays either one of the work contents, unloading or unloading, by the unloading lamp 30 or the unloading lamp 31, and the data of the shelf 1 corresponding to the work content is displayed. The presence / absence lamp 32 displays the presence / absence, and the number of the shelf 1 corresponding to the work content is also displayed on the display unit 3.
3 will be displayed. When the lift automatic trigger switch 27 or the tilt automatic trigger switch 28 is pressed, it is received by the CPU 13 via the interface 29, and the CPU 13 receives the predetermined height data and inclination data of the shelf 1 based on the data. D / A converter 19,
The control valve 20 for operating the lift cylinder 16 or the control valve 21 for operating the tilt cylinder 17 is controlled via the constant current amplifier 22 to lift the lift to a predetermined height position of the shelf 1 in the lift device, or The shelf 1 is tilted and tilted to a predetermined tilted attitude.

In the CPU 13, when the lift height is input from the physical distribution management computer 4 to the height data of the shelf 1 during the automatic loading operation, when the lift lever 14 is operated in the lift rising direction, for example, When the lift is lifted to a position 10 cm above and the lift lever 14 is operated in the lift lowering direction, the lift is lifted to the height data position of the input shelf 1.

Further, the CPU 13 confirms the presence or absence of height data and tilt data of the shelf 1 corresponding to the work content, and when there is no data, the lift automatic trigger switch 27 or the tilt automatic trigger switch 28 is pressed. Also does not automatically lift and tilt.

As a result, in the work control system of the forklift truck, the worker looks at the work content displayed on the display operation unit 25 at the start of work and confirms whether it is a unloading work or a laying work, and Then, the forklift truck 3 travels and stops at a predetermined position. Then, the operator confirms the presence or absence of the height data and the inclination data of the shelf 1 corresponding to the work content, and when they are present, the lift automatic trigger switch 27 or the tilt automatic trigger switch 28.
Press. Then, for example, as shown in FIG. 6, when the operator operates the lift lever 14, the lift is lifted based on the height data of the shelf 1 and automatically stops at a predetermined height, and the tilt lever 15 When is operated, tilting is performed based on the tilt data of the shelf 1, and the shelf 1 is automatically stopped at a predetermined tilt. Then, the worker can move the forklift truck 3 forward to perform unloading or loading.

In this way, at the time of loading and unloading work,
Since the lift can be automatically lifted to a predetermined height and the tilt can be automatically tilted to a predetermined tilt, the operator can operate the lever to determine the lift lift position and the tilt tilt angle. It is possible to make the work easier, to eliminate the requirement of high skill for the worker, and to significantly reduce the burden on the worker. Further, the work can be easily performed even at the high position where the visibility is poor, and the work efficiency can be prevented from lowering.

Further, it is not necessary to select and operate a desired height set value from a plurality of height set values in the conventional lift lifting height, which is troublesome for the work. In addition to eliminating this, the simple operation of pressing the automatic trigger switch 27 for lift or the automatic trigger switch 28 for tilt makes it possible to eliminate erroneous operations.

Moreover, since the lift height and tilt tilt can be automatically set to a predetermined height and tilt, the lift lift and tilt tilt can be performed even when the worker is traveling the forklift truck 3. This makes it possible to complete the lift height and the tilt tilt when the traveling is stopped, and the work cycle time can be known.

[0020]

EFFECT OF THE INVENTION The distribution management computer stores in advance height data and inclination data of each shelf of the storage body,
The in-vehicle controller controls the lift height and the tilt tilt based on the respective data so that the lift can be automatically lifted to a predetermined height and the tilt tilt is automatically made to the predetermined tilt. By being able to do so, the work can be facilitated. Therefore, it is possible to eliminate the requirement of high skill for the worker, and it is possible to significantly reduce the burden on the worker, and it is possible to easily perform the work particularly in a high position where visibility is poor. Therefore, it is possible to prevent a decrease in work efficiency.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of a work control system for a forklift truck of the present invention.

FIG. 2 is a configuration diagram of a physical distribution management computer in a work control system for a forklift truck.

FIG. 3 is a configuration diagram of an in-vehicle controller in a work control system for a forklift truck.

FIG. 4 is an explanatory diagram of a display operation unit in the work control system of the forklift truck.

FIG. 5 is an explanatory diagram of an automatic trigger switch in a work control system for a forklift truck.

FIG. 6 is an explanatory view of a work state of a work control system of a forklift truck.

[Explanation of symbols]

1 ... Shelf, 2 ... Storage unit, 3 ... Forklift truck, 4
… Logistics management computer, 5… In-vehicle controller, 6…
Memory part, 7 ... Computer body, 8 ... Input / output terminal, 9
... interface, 10 ... radio, 11 ... RAM, 1
2 ... ROM, 13 ... CPU, 14 ... Lift lever, 15
... Tilt lever, 16 ... Lift cylinder, 17 ... Tilt cylinder, 18 ... A / D converter, 19 ... D / A converter, 20 ... Control valve, 21 ... Control valve, 22 ... Constant current amplifier, 23 ... Radio, 24 … Interface, 25…
Display operation unit, 26 ... Interface, 27 ... Lift automatic trigger switch, 28 ... Tilt automatic trigger switch, 29 ... Interface, 30 ... Pickup lamp, 3
1 ... Loading lamp, 32 ... Presence / absence lamp, 33 ... Display unit,
34 ... Tilt angle sensor, 35 ... Lifting height sensor.

Claims (1)

[Claims] 1. A storage body 2 having a plurality of partitioned shelves 1.
Is equipped with a physical distribution management computer 4 that manages the unloading and placing work of the forklift truck by the operator. Based on the data from this physical distribution management computer 4, the operator operates the forklift truck 3 to perform the desired work. In a work control system for a forklift truck, the physical distribution management computer 4 stores the height data and the tilt data of each shelf 1 of the storage body 2, and the onboard controller mounted on the vehicle body of the forklift truck 3 5, the on-vehicle controller 5 controls the lift height and tilt tilt in the lift device of the forklift truck 3 based on the respective data, and the work control system for the forklift truck.