JPS61211707A - Determining method for running speed of unmanned carrying truck - Google Patents

Abstract

PURPOSE:To enable investment of high cost performance by carrying truck system of small number by reading change of tact, simulating basing on the information and controlling after determining optimum running speed and acceleration and deceleration of an unmanned carrying truck. CONSTITUTION:When determining running speed, new tact information is received and simulated at the time of changing type of machine. As to appreciation of capacity of carrying between lines, it has versatility for parameters such as number of production lines, tact, distance of carrying, number of loads, number of unmanned carrying trucks etc., and it is not necessary to change soft itself even when the object is changed. For instance, the tact of a work came out from an annealing furnace 4 is aleays watched by a detector 12, and the running speed and acceleration and deceleration are appreciated by simulation soft incorporated in a controller 13. The determined specification is transmitted to a carrying truck 9 as controlling information, and operated at unique running speed and acceleration and deceleration until next changed type of machine appears.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for transporting products pulled from multiple production lines producing a wide variety of items using an automatic guided vehicle.
This relates to a method for determining the running speed of an unmanned guided vehicle in a system in which the required transport capacity changes significantly [1] over time. .

In recent years, automated guided vehicles have been widely used due to their flexibility in transporting products from multiple production lines that carry out conventional processing and assembly.

Although unmanned guided vehicles have disadvantages in terms of conveyance capacity compared to continuous conveyance means such as conveyors, they do have advantages in terms of layout flexibility. However, this system using an unmanned guided vehicle is expensive, and therefore efficient operation is required.

Conventionally, when each production line that performs processing or assembly produces a wide variety of products and the production takt time is also diverse, the combination of the maximum flow rate of each production line is determined by the capacity required of the automatic guided vehicle. Considering this, we calculated the required number of automatic guided vehicles based on the traveling speed of 1~ based on the specifications of the automatic guided vehicles.

Figure 4 shows the conventional example of Reira 1~, and 2.
11 is multiple production lines installed in parallel, 22 is production line 2
These are two automated guided vehicles for transporting the products from 1 to the next culm 23. This unmanned guided vehicle 22 is used by 11 people 1-
When using the running speed C' continuously, the transport flow rate of the conveyor (
For setting the number of transport vehicles 22, for example λ, two vehicles are required as shown in the figure, and a large amount of space is also required for transport. In addition, the driving speed 1 is temporarily changed, but in normal operation speed 1 river J is constant (straight weight is set, A speed is set in real time t,
There was no change.

Problems solved and improved by the invention Conventionally, the number of automatic guided vehicles was set based on the instantaneous maximum required capacity. When there is a conveyance amount
This automated guided vehicle operates at a high operating rate, but under average continuous operation (-), the operating rate is poor and the installation investment is eroded.
1- Pano A-nse is egg weight.

(゛The present invention is applicable to 1p uniformly required lll!ll
Conveying capacity (・If high-speed conveyance is required, set the number of trolleys, evaluate the travel speed required for the measure, and apply the J signal to the unmanned guided vehicle (corresponding to In addition to improving storage performance by reducing the number of unmanned guided vehicles, safety for surrounding workers is ensured by transporting at high speed only during times when transport is normally performed at low speed, instead of transporting at high speed all the time. - There are things whose purpose is to

Means for Solving the Problems In order to solve the above problems, the method for determining the traveling speed of an automatic guided vehicle according to the present invention provides a method for determining the traveling speed of an automatic guided vehicle that uses J51 on multiple processing and assembly production lines that produce a variety of items with different production takt times. ．．
Based on the takt detection signal, the system detects the production takt and provides the required capability based on the takt detection signal to the unmanned guided vehicle that transports finished products arranged from the production line to the next process. There is a system C that controls the running speed of the automatic guided vehicle according to the required speed.

Effect By doing this, the number of unmanned guided vehicles, which was previously calculated according to the transport capacity required for the maximum peak when traveling at a constant speed, is reduced.
By controlling the travel speed required for the automated guided vehicle in real time, instantaneous A1 high speed II! ! It is possible to perform low-speed transport in a steady state, and as a result, a low-cost, space-saving transport system can be realized using fewer automated guided vehicles.

J-3, when calculating the required number of conventional unmanned guided vehicles (
42. Set with maximum required ability or tough 1-
In cases where the fluctuation is small, the safety factor was calculated based on the average capacity, but there are many conditions, and the required number is expressed by a nonlinear curve, which makes it difficult to calculate mathematically, and it is necessary to rely on intuition.
However, in the present invention, it is possible to employ simulation methods 1 to 1 to quantitatively and strictly address these problems.

Embodiment In the above, an embodiment of the method for determining the running speed of an automatic guided vehicle according to the present invention will be described with reference to the drawings.

Figure 1 shows the basics of running a simulation (determining the speed, getting information to the new Tough 1 when the model is turned off), and is the main feature of the present invention. This is the part where the performance of line-to-line transfer is evaluated.It is versatile for parameters such as the number of production lines, takt time, transfer distance, number of loads, and number of unmanned guided vehicles. There is no need to modify 1~ itself, and the object can be expressed only with data.In this simulation sono 1-, when the evening 1~ri changes, the running speed, acceleration/deceleration, etc. will be trialled. The system automatically calculates the matching until it is within the allowable time for transport, and the result is transmitted to the automatic guided vehicle and operated until the next model change occurs.

Figure 2 shows an application example of an unmanned guided vehicle incorporating the above software. FIG. 2 shows the layerer 1 of the system for conveying to the next process after molding and annealing in a plastic lens production line.

There are eight production lines 14, and each production line 14 produces a wide variety of products while switching models.

The outline of the flow is explained above.

The plastic lens molded by the molding machine 1 is transferred to a jig pallet by the take-out machine 2, and is transported to the annealing furnace 4 by the tact-feeding transport conveyor 3. Workpieces that have been sent to Tough 1 and subjected to periodic arching are
Aya'/, ration i=J<rfree-no-D-:] Sent to Nbenono 5, developed by the front, loaded 1-J-bot I/6, positioning regulating device 7-1. : t='s)
(The lens is transferred to the lens storage box 8 while being lined up. When the storage box 8 is full, the transfer drive fj starts.) is,
It is sent to the delivery conveyor 10.

Also, the empty storage boxes 8 are transferred from the empty box supply conveyor 11 to the receiving 11.
'y, S, is supplied to the empty positioning regulating device 7.

Next, the traveling speed control of the transport vehicle 9 will be explained.

, the toughness 1- of the workpiece taken out from the annealing furnace 4 is constantly monitored by the detector 12, and the toughness
When ~ changes lζ, tact information is transferred from the detector 12 to the unmanned conveyance vehicle unit 1 to roller 13 (hereinafter referred to as controller). Based on the transferred tact information, the acceleration/deceleration of traveling speed 1-1 is evaluated and determined by the above-mentioned simulation software (~ built in ]]n 1-○-ra 1. The control information is sent to 9, and the machine is operated at a unique running speed and acceleration/deceleration until the next model cutoff occurs.

As mentioned above, the evaluation using simulation software is based on the predicted value of the maximum number of devices that can be used until service is received on the requested line. There is no problem if the maximum number of waiting times is within the number of accumulation buffers of the free flow conveyor 5, but if it exceeds the number, it will affect the molding machine 1, annealing furnace 4, etc. and stop the process. It is not allowed to stop it.

FIG. 3 shows the data structure necessary for simulation. Here, the processing code is a pattern of the configuration of the transport system, and indicates a corresponding processing pattern. The full number indicates the number of people in the storage box 8, the cumulative number of people indicates the cumulative number of people in the storage box 8 up to the present time, and the convergence indicates the number of items loaded on the jig pallet. The next equipment number represents a link relationship indicating the connection of each component of the transport system. The transport distance to the next facility and the transport distance to the empty box supply process indicate the distance traveled by the transport vehicle 9.

According to the present invention, by reading changes in takt time, simulating using that information, and determining and controlling the optimal traveling speed and acceleration/deceleration of the automatic guided vehicle, the number of guided vehicle systems can be reduced. It is possible to make a high investment with a loss of 1 ~ performance due to the system, and it is not a system that constantly transports at high speed, but it is always medium-low speed transport, and high-speed transport is instantaneous, so it is possible to build a system that is safe for surrounding workers. I can do it. Furthermore, it can be applied even if the number of lines or production types changes in the future.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the basic logic of simulation software 1 to evaluate the traveling speed and acceleration/deceleration of the transport vehicle system in the present invention, FIG. The figure does not show an example of data used for simulation sono (-), and Figure 4 is a diagram showing an example of a conventional transport vehicle system. 9...Automated guided vehicle, 12...Detector, 13...・
Controller, 14...Production line agent Yoshihiro Morimoto Figure 2 q-g person 11 ward machine t2-Orange imitation/3- Controller/4--Ichisho, Arau A, Figure 3

Claims (1)

[Claims] 1. Detects the production takt on multiple processing and assembly production lines that produce a variety of items with different production takt times, and applies it to an automated guided vehicle that transports finished products output from the production line to the next process. A method for determining the running speed of an automatic guided vehicle, characterized in that the required capacity is evaluated by simulation based on the tact detection signal, and the required running speed of the automated guided vehicle is controlled.