JPH09188413A - Control method for physical distribution - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress inhibition of physical distribution and perform smooth-physical distribution. SOLUTION: First and second conveyance part 8 and 7 [7A-7C] are present in a relation of a plurality of pairs and a control method is for physical distribution through which a substance 2 to be conveyed flows to the first and second conveyance parts 7 and 8. A main conveyance line 4 and a conveyance line 5 for storage are provided, and a first substance 2 to be conveyed conveyable to both of the first and second conveyance parts 8 and 7 is fed to the main conveyance line 4 and a second substance 2 to be conveyed conveyable only to the second conveyance part is temporarily stowed at the conveyance line 5 for storage. While the conveyance line 5 for storage is not full of the first substance 2 to be conveyed, the first substance 2 to be conveyed flows to a spot situated downstream of the main conveyance line and is conveyed to the first and second conveyance parts. When the conveyance line for storage is rendered full of the second substances 2 to be conveyed, the first substance 2 to be conveyed and the second substances 2 in the conveyance line 5 for storage are caused to flow alternately to a spot situated downstream of the main conveyance line 4 and are conveyed to the first and second conveyance parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling physical distribution when an object to be conveyed is sent to different conveying parts.

[0002]

2. Description of the Related Art For example, in the manufacturing process of a cathode ray tube, an object to be transferred, for example, a work such as a cathode ray tube body is placed on a transfer line, and a transfer part, for example, surface treatment or other treatment It is carried out selectively to different departments (hereinafter referred to as processing departments).

As a method of carrying out such physical distribution, for example, destination designation information is attached to each work, and at a position where the destination is judged based on this information, the work is branched and sent to a predetermined processing department. .

However, in this method, the movement of information and the work must be paired, and a data shift (information communication) that is difficult to see must be included in the program. Therefore, the state of data shift must be confirmed as an item to be confirmed when an accident occurs.

On the other hand, when the works such as the cathode ray tube which have been put on the transfer line are put into the designated processing departments, the physical distribution is prevented so as to prevent the physical distribution from being disturbed as much as possible. It is desired to let

In view of the above points, the present invention provides a physical distribution control method capable of suppressing physical distribution obstruction and enabling physical distribution control without data shift.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a first transport section and a second transport section exist in a one-to-many relationship, and an object to be transported is placed at the first transport section and the second transport section. A method of controlling physical distribution for flowing, comprising a main transfer line and a storage transfer line, and capable of being transferred to either the first transfer section or the second transfer section. Sent to the main transfer line
The second transferred object to be transferred only to the transfer section is temporarily stored in the storage transfer line, and the first transferred object is mainly stored while the storage transfer line is not filled with the second transferred object. When the storage carrier line is filled with the second transported object after being conveyed to the first conveyor section and the second conveyor section by flowing to the downstream of the conveyor line, The second transported object is alternately flowed downstream of the main transport line to be transported to the first transport station and the second transport station.

According to such a physical distribution control method, even when the second object is continuously sent, the second object is temporarily stored in the storage transfer line and the storage transfer line becomes full at the same time. Since the first transported object and the second transported object are alternately transported to the target transportation portion through the main transportation line, the transportation is not delayed, and thus the distribution obstruction is minimized to carry out the distribution. be able to.

The first transported object and the second transported object are divided into a main transportation line and a storage transportation line, and the separated transported objects are alternately distributed, whereby physical distribution on the downstream side is achieved. The distribution to the first transfer section and the second transfer section can be performed only by control.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

This example is a case where the cathode ray tube bodies for performing different treatments are mixed, and the cathode ray tube bodies are distributed to the required processing parts and introduced.

FIG. 1 is a schematic configuration diagram showing an example of a physical distribution control device according to the present invention. This physical distribution control device 1 is located on the upstream side of the main transport line, that is, the main transport conveyor 4, on which a pallet 3 carrying a cathode ray tube body (hereinafter referred to as a work) 2 to be processed is transported. It has a storage transfer line, that is, a stock transfer conveyor 5, which are arranged in parallel with each other.

On the downstream side of the main conveyer 4, a plurality of second conveyer stations 7 in parallel with each other, that is, second treatment stations 7 [7A, 7B, 7C] for performing the same processing, respectively, At the other position, one first transfer section, that is, a first processing section 8 that performs a different process from the second processing section is arranged.

At a first position P ₁ corresponding to a branch point between the main conveyor 4 and the stock conveyor 5, a first object to be conveyed, which will be described later, that has been mixed, that is, a first work 2 [X].
₁ , X ₂ , ... X ₂₁ , X ₂₂ ] and the second conveyed object, that is, the second
The control means for allocating the workpieces 2 [Y ₁ , Y ₂ , ...] To the main transfer conveyor 4 and the stock transfer conveyor 5, that is, a first programmable controller (so-called computer) 10 is arranged. On the downstream side of the main transport conveyor 4, for example, to the second position P ₂ corresponding to the first processing section 7A, the workpiece 2 sent to each corresponding processing section 7A, 7B, 7C, 8 is transferred. A control means for distributing, that is, a second programmable controller (so-called computer) 11 is provided.

A bar code reader is connected to the first and second programmable controllers 10 and 11, and the bar code attached to each work 2 is read by this bar code reader.

The first work 2 [X ₁ , X ₂ , ...
...] indicates the first processing section 7 or the second processing section 7 [7A,
7B, 7C]. Further, the second work [Y ₁ , Y ₂ , ...] Is a work which can only be charged into the second processing section 7 [7A, 7B, 7C]. The first work pieces 2 [X ₁ , X ₂ , ...] And the second work pieces 2 [Y ₁ , Y ₂ , ...] Are mixed and sent from the upstream of the main conveyor 4.

The main conveyor 4 and the stock conveyor 5 are provided with transfer machines 13A, 13B, 13C and 13D for transferring the work 2 between the conveyors 4 and 5, respectively. Further, at a position corresponding to each second processing station 7 [7A, 7B, 7C] of the main conveyor 4, a transfer machine for transferring the work 2 to each corresponding processing station 7A, 7B, 7C. 14A, 14B, 14C are provided, and a stopper 15 for stopping the pallet 3 on which the work 2 is placed is provided in front of each transfer machine 14A, 14B, 14C.

Next, a physical distribution control method for introducing the work (cathode ray tube) 2 into the required processing section 7 or 8 using the physical distribution control device 1 will be described.

In this example, the first work 2
[X ₁ , X ₂ , ...] And the second work 2 [Y ₁ , Y ₂ ,
...] is mixed, but the first work 2 [X ₁ , X
₂ ... Is much larger than the second work 2 [Y ₁ , Y ₂ , ...] (For example, the first work is 70 to 80% and the second work is 30 to 20%). And Further, it is predetermined that the number of works 2 to be processed in the first processing department 8 and the number of works 2 to be processed in the second processing departments 7A to 7C are set to a certain ratio. There is. As an example, assume that the ratio of the number of processes in the first processing department 8 to the number of processes in the second processing departments 7A to 7C is 1: 2.

First, the first work 2 [X ₁ , X ₂ , ...] And the second work 2 [Y ₁ ,
Y ₂ , ...] is distributed by the bar code reader and the first programmable controller 10 at the first position P ₁ which is a branch point, and the first work 2
[X ₁ , X ₂ , ...] Directly flow to the main conveyor 4, and the second work 2 [Y ₁ , Y ₂ ,.
It flows to the stock conveyor 5 side by A and 13B, and is temporarily stored there (see FIGS. 2 and 3).

Then, as shown in FIG.
The feeding conveyor 5 is the second work 2 [Y ₁, Y_Two,‥‥〕so
While not being satisfied, the first work 2 [X₁, X_Two・ ・ ・
...] is sent directly to the downstream of the main conveyor 4,
Second position P_TwoIn the bar code reader and the second
Processing unit 7 by programmable controller 11
A to 7C and 8 are assigned to transfer machines 14A to 14C
Via each of the processing units 7A to 7C.
It is put into the processing department 8.

In this example, since the processing is performed at a ratio of 1: 2, the work X ₁ is processed in the processing department 7A, the work X ₂ is processed in the processing department 7B, the work X ₃ is processed in the processing department 7C, and the work X ₄ is processed. To the processing department 8, the work X ₅ to the processing department 7 A, and the work X ₆ to the processing department 8 as ... Table 1 shows the state of charging to the processing stations 7A to 7C, 8 in this case.

[0023]

[Table 1]

Next, as shown in FIG. 3, when the stock conveyor 5 is filled with the second work, the first work 2 [X ₂₁ , X is simultaneously transferred through the transfer machines 13D and 13B.
₂₂ ] and the second work 2 [Y ₁ , Y ₂ , ...] are alternately sent downstream of the main conveyor 4 (see the chain line), and each work 2 is at the second position P ₂ . The bar code reader and the second programmable controller 11 distribute the processing units 7A to 7C and 8 to the transfer unit 1.
It is input to the corresponding processing departments 7A to 7C via 4A to 14C and is also supplied to the processing department 8. That is, in this case, for example, the second work Y ₁ is in the processing department 7A, the first work X ₂₁ is in the processing department 7B, the second work Y ₂ is in the processing department 7C, and the first work X. ₂₂ is inputted to the processing department 8, the first work Y ₃ is inputted to the processing department 7A, the first work X ₂₃ is inputted to the processing department 8 as ... Table 2 shows the state of charging to the processing stations 7A to 7C, 8 in this case.

[0025]

[Table 2] As is clear from the above Tables 1 and 2, it is possible to allocate the first processing section 8 and the second processing sections 7A to 7C at a ratio of 1: 2. If the stock conveyor 5 becomes empty, only the first work will be sent to the downstream of the main conveyor 4 while the second work 2 is filled therein again, and this carrying state is repeated.

On the other hand, the second programmable controller 11 makes a determination to distribute the work 2 in the direction of the processing stations 7A, 7B, 7C and 8, but the first work 2
When the [X] and the second work 2 [Y] are alternately put into the processing stations 7A, 7B, 7C and then inserted into the processing station 8, the first workpiece which cannot be thrown into the processing station 8 is inserted. Work 2
When [Y] arrives at the _second position P ₂ , it is put into the processing section 7A which is ready to be put in, and then sent to the first section P2.
The work 2 [X] is put into the processing section 8.

The second work 2 [Y] and the first work 2 [X] are alternately switched by the upstream stock carrying conveyor 5 and the main carrying conveyor 4 and sent out to the downstream part of the main carrying conveyor 4. Therefore, even if the next work 2 [Y] cannot be loaded into the processing department 8 after the work 2 [X] is loaded into the processing department 7C, the next work 2 [X] is further processed. Since it can be input to the processing unit 8, the work input flow in the processing unit 8 direction can be delayed by one work.

Further, for example, the processing department 7C is in an operation stop state for repair, and the work 2 is conveyed to the first processing department 8 and the second processing departments 7A and 7B at a ratio of 1: 3. When carrying out, the stock conveyor 5 is used for the second work 2
When the stock is not filled with [Y], it is distributed as shown in Table 3, and after the stock conveyor 5 is filled with the second work 2 [Y], it is distributed as shown in Table 4.

[0029]

[Table 3]

[0030]

[Table 4]

According to the above embodiment, the main conveyor 4
In addition to the stock transfer conveyor 5, a second work 2 [Y] is stored in the stock transfer conveyor 5,
At the same time as full, the second work 2 [Y] of the stock conveyor 5 and the first work 2 of the main conveyor 4
[X] are sent alternately, and the corresponding control means _{2 at} the second position P ₂ , that is, the second programmable controller 11 sorts the corresponding works 2 and conveys them to the processing stations 7A to 7C and 8. The first work 2 [X] and the second work 2 [Y] can be smoothly distributed without stagnation. That is, the physical distribution control by the downstream second programmable controller 11 can minimize the physical distribution obstruction.

Further, even if the second work 2 [Y] which cannot be fed into the processing department 8 comes after being introduced into the processing departments 7A, 7B and 7C, the next first work 2 [X] is processed. Since the work can be input to the department 8, the work input distribution to the processing department 8 can be delayed by one work.

When the works 2 [X] and 2 [Y] are distributed according to the ratio, the processing stations 7A, 7B, 7 are used.
It is possible to operate C and 8 evenly without being biased.

Between the first programmable controller 10 arranged at the _first position P ₁ on the upstream side and the second programmable controller 11 arranged at the _second position P ₂ on the downstream side, the work is Give destination information to
Logistics can be easily performed without data shift (information communication) between each other. Therefore, even if the programmable controller is not linked, the wiring at the actual I / O level is not required.

Although the above example is applied to the physical distribution in the manufacturing process of the cathode ray tube (work), it can be applied to other physical distribution control.

[0036]

According to the distribution control method of the present invention,
It has a main transfer line and a storage transfer line, and while the storage transfer line is not filled with the second transfer target, only the first transfer target is sent to the downstream side, and the storage transfer line transfers to the second transfer target. At the same time as being filled with the transported object, the second transported object and the first transported object are alternately sent downstream,
1: It is possible to smoothly carry out physical distribution with a minimum of physical distribution obstruction with respect to a plurality of first conveying section offices and second conveying section offices.

When the first and second objects to be conveyed are flown to the first and second conveyor parts at a required ratio, the respective conveyor parts can be operated uniformly.

The first control object and the second control object are distributed to the main transfer line and the storage transfer line by the control means on the upstream side,
Since the control means on the downstream side carries out the distribution of the transported objects to the transport parts, smooth physical distribution can be performed without data shift between the control means.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an example of a physical distribution control method according to the present invention.

FIG. 2 is an operation explanation showing an example of a physical distribution control method according to the present invention.

FIG. 3 is an operation explanation showing an example of a physical distribution control method according to the present invention.

[Explanation of symbols]

1 Physical distribution regular device 2 [X ₁ , X ₂ , ..., Y ₁ , Y ₂ , ...] Cathode ray tube (work) 3 Pallet 4 Main transfer line 5 Storage transfer line 7A, 7B, 7C, 8 Processing section 10, 11 Programmable controller 13A to 13D, 14A to 14C Transition machine 15 Stopper

Claims (2)

[Claims] 1. A physical distribution control for flowing an object to be conveyed to the first transfer section and the second transfer section, where the first transfer section and the second transfer section have a one-to-many relationship. A method, comprising: a main transfer line having a main transfer line and a storage transfer line, the first transfer target being capable of being transferred to either the first transfer section or the second transfer section. The second conveyed object which is sent to the line and should be conveyed only to the second conveying section is temporarily stored in the storage conveying line, and the storage conveying line is not filled with the second conveyed object. Between the first transfer part and the second transfer part by flowing the first transferred object downstream of the main transfer line, and the storage transfer line is the second transferred object. When filled, the first transferred object and the second transferred object on the storage transfer line are alternately transferred to the main transfer. The method of distribution, characterized in that for conveying flowing downstream in the first conveying portion plant and the second conveying unit locations. 2. The physical distribution control method according to claim 1, wherein the transported object is transported to the first transport section and the second transport section at a predetermined ratio.