JPS61269025A - Linkage operation controller between combination weighing apparatus or combination counter and several packaging machines - Google Patents

Abstract

PURPOSE:To enable effective operation of individual packing machines, by performing the supply control of new goods to weighing devices which has discharged goods through an interrupt control to an arithmetic control section. CONSTITUTION:When timing signals TSa and TSb are inputted into an arithmetic control section E from packing machines (a) and (b), a command is outputted to multiplexer C from the arithmetic control section E to take in the weight of goods sequentially from weighing devices 1...n. Then, the analog signal from the multiplexer C is converted into a digital value with an A/D converter D to be inputted into the arithmetic control section E, which performs a combined computation on a specified pattern. The combinations equal or near the target weight is selected as discharge combinations from those above the target weight set with a target weight setting section G but below the upper limit weight set with an upper limit weight setting section F. Then, a signal for opening the (a) side gate or the (b) side gate of a weighing hopper of the corresponding weighing machine is sent to transfer goods to the packing machine (a) or (b).

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an interlocking operation control device for a combination weighing device or combination counting device and a plurality of packaging machines.

(Conventional example) Subdivided items are fed into multiple weighing machines and weighed, and the weight of the items obtained by each weighing machine is input to a calculation control unit consisting of a microcomputer, etc. Combination weighing devices have been put into practical use that perform combination calculations, select combinations that meet certain conditions as discharge combinations, and discharge articles from corresponding weighing machines. There is also known an interlocking control device for a combination weighing device and a packaging machine, in which a packaging machine is placed close to such a combination weighing device and the articles discharged from the combination weighing device are packaged. .

FIG. 6 is a schematic mechanical diagram of such a combination weighing device. In FIG. A trough 6 is disposed in the radial direction via a feeder 5 on the periphery of the 0-dispersion feeder 4 in which a 1-distribution table 4 is provided so as to be able to reciprocate by a predetermined angle by an electromagnetic vibration device 3. A pool hopper 7 is provided circumferentially with respect to the upper frame 2, and a weighing hopper 9 supported by a weight detector 8 such as a load cell is provided below the pool hopper 7. Weighing machines consisting of: Drive device 1 for operating the opening/closing lid operating link of the pool hopper and weighing hopper
0 is provided with interlocking mechanisms 10a to lOc, which are driven by a motor 11. Depending on whether the a-side gate 9a or the b-side gate 9b of the weighing hopper of the weighing machine selected for the discharge combination is opened, the discharged articles are delivered to the chute a (12a) of the discharge chute 12 or the chute b) (
12b) into timing hopper a or timing hopper b.

When the timing hopper a or b is opened, the articles placed therein are transferred to the packaging machine a or b, and predetermined packaging processing is performed.

(Problems with the prior art) When two packaging machines are operated in conjunction with such a combination weighing device having two discharge chutes, a timing signal is output every time the two packaging machines perform a wrapping operation. is the seventh
The output was synchronized as shown in Figure (b). For this reason,
As shown in FIG. 7(a), the two packaging machines a and b are electrically connected and it is necessary to provide a synchronization device on either packaging machine a or b, which increases the equipment cost. In addition, when there is a difference in processing capacity between two packaging machines, the operation is performed in accordance with the packaging machine with lower capacity, which has the disadvantage that the efficiency of the higher capacity packaging machine decreases. If the processing capacity of packaging machine a is 40 packs/min and the processing capacity of other device ab is 30 packs/min, packaging machine a will synchronize according to packaging fib.

The throughput is reduced by 1O back/min.

The above explanation is about the problems in the interlocking operation of the combination weighing device and the packaging machine. - The weight of the article is divided by the weight per unit number (unit quantity) to convert it to the number of pieces, and the combination calculation is performed. A similar problem occurs when a combination that meets certain conditions is selected as a discharge combination and a packaging machine and a combination counting device that discharges articles from the corresponding weighing machine are operated in conjunction.

(Objective of the Invention) The present invention enables interlocking operation with a combination weighing device or a combination counting device even when multiple packaging machines output timing signals independently without synchronizing them. This eliminates the need to electrically connect multiple packaging machines, reduces equipment costs by eliminating the need for synchronization devices installed in any of the packaging machines, and eliminates differences in processing capacity between each packaging machine. It is an object of the present invention to provide an interlocking operation control device for a combination weighing device or a combination counting device and a packaging machine, which enables efficient operation of each packaging machine by enabling interlock operation with the combination weighing device or combination counting device even if there is a combination weighing device or combination counting device. It is something to do.

(Summary of the Invention) The interlocking operation control device for a combination weighing device or combination counting device and a plurality of packaging machines according to the present invention includes a plurality of weighing machines that measure the weight of articles, and a weight input from each weighing machine. , a calculation control unit that performs combination calculations according to a predetermined pattern, selects a discharge combination that satisfies certain conditions, and outputs a signal for discharging articles to the selected weighing machine; In a device consisting of a combination weighing device or combination counting device having a plurality of discharge chutes for transferring to a packaging machine, and a plurality of packaging machines, the above combination calculation is started by a timing signal from each packaging machine, and a discharge combination is selected. Then, the timing signal is output from the weighing machine selected for the discharge combination.The article is discharged to the discharge chute corresponding to the packaging machine on the □ side, and the supply of new articles to the weighing machine that discharged the article is controlled. , is characterized in that it is performed by interrupt control of the arithmetic control section.

(Example) An example of the present invention will be explained with reference to the following figures.
The figure is a schematic block diagram of an interlocking operation control device for a combination weighing device and a packaging machine. Pool hopper, a side gate, b
n weighing units Ja and B each consisting of a weighing hopper having a side gate, a weight detector, etc. are arranged, and the same number of feeders A are provided corresponding to the weighing machines. When the feeder is driven by a signal from the arithmetic control unit E, which is composed of a microcomputer or the like, the article is thrown into the pool hopper of each weighing machine, and then the pool hopper is opened and the article is thrown into the weighing hopper. Furthermore, as will be detailed later, a packaging machine a
, b, the timing signals TSa, TSb are sent to the calculation control unit E.
, the arithmetic control unit outputs a command to the multiplexer C to sequentially import the weight of the article from each weighing machine, and the analog signal from the multiplexer is converted into a digital value by an A/D converter. arithmetic control section E)
is input. The arithmetic control section performs a combination calculation according to a preset pattern, and selects a target weight among the combinations that are equal to or greater than the target weight set in the target weight setting section G and below the upper limit weight set in the upper limit weight setting section F. Select a combination equal to or close to as the discharge combination,
A signal is sent to open the a-side gate or b-side gate of the weighing hopper of the corresponding weighing machine, and the article is transferred to the packaging machine a or b. When the product is finished being discharged, a discharge completion signal ES is sent to the packaging machine.
Output a or ESb. The arithmetic control section displays necessary items such as the weight of the article on the 0 display section H, which is composed of an I10 board, memory ROM, RAM, central processing unit (CPU), interrupt control section, pass line, etc.

FIG. 2 is a configuration diagram of a memory RAM provided in the arithmetic control section.

This RAM consists of 1 weight memory (a), weighing stability timer memory (b), non-ejection count memory (c), feeder timer memory (d), delay timer memory (e), calculation request flag (f), and ejection completion timer. It consists of memory (g) °, loop flag (h), and other memories (su).

Next, the control of the interlocking operation of the combination weighing device and the packaging machine according to the present invention will be explained with reference to the flowchart shown in FIG.

(1) Check whether the computation request flags CFa and CFb are both L, and if either or both of CFa and CFb are H, proceed to the next process (step P 1 )
*When either or both flags CFa and CFb are H, it is checked whether the weighing hopper gate drive device that operated last time and discharged the article has returned to its original position (step P2). C.F.
If a is H, the a-side gate drive device that was activated last time is checked, and if the flag CFb is H, the b-side gate drive device that was activated last time is checked. Next, the check result is judged (step P3), and if there is an abnormality, an alarm is displayed (step P4), and the operation of the combination weighing device is stopped.

(2) If the check result is normal, loop flag LF
is H (step P5). If the loop flag is not H, input the weight from the weighing machine whose weighing stability timer memory WT is zero and store it (step P6). If the memory value is zero, it is assumed that the time has increased and the weight is stable. Check whether the computation request flag CF becomes H during this loop processing (step P
7) If flag CF is H, loop flag LF is set to H.
(Step 2), the step of inputting the weight is omitted and the loop flag LF is set to OFF (Step P9), because re-inputting the weight would be a waste of time. If there is a weighing scale whose weighing stability timer memory value becomes zero during the above loop processing, the weight is input and recorded only from that weighing machine in step P9.
You can also remember it.

(3) Next, the calculation request flags are CFa, CFb
' Check whether both are H.

(Step Pro), both flags should be H.
Live 17.7 7 Ps(*t)r□, eh, □ka □
;The count value of non-discharge count memory DC is large.
□Predetermined weighing machine 1 For example, a maximum of 10 weighing machines can be used for combined settlement, and if the weight is below the upper limit weight and above the target weight.
・Find a set of discharge combinations Pa that is equal to or close to this (step Prt), and then select a predetermined weighing machine 1 with a large non-discharge count memory value, for example, up to 10, among the weighing machines that were not selected as the discharge combination Pa. A set of discharge combinations Pb, which are less than the upper limit weight and more than the target weight and are equal to or close to the upper limit weight, are calculated using the weighing machine (step P).
12)・At step pio, the calculation request flag CFa,
If any of CFb is L, step Ps (
* Among the weighing machines stored in step 1), perform a combination calculation on a predetermined weighing machine with a large count value in the non-discharge count memory DC (for example, up to 10 weighing machines), and check whether the weight is below the upper limit weight, above the target weight, and equal to it. or a close set of discharge combinations Pa
Or find Pb (Step P13). (4) Next, check whether the discharge combination has been determined. Step PL4). If the discharge combination is determined, according to the discharge combination, if the discharge combination is Pa, the a of the weighing hopper is The signal to open the side gate, and the discharge combination is Pb.
If so, output a signal to open the b-side gate of the weighing hopper (step P15), open the pool hopper of the corresponding weighing machine, and use the output signal to operate the feeder to control the next combination weighing to be possible. If a discharge combination is not obtained, which is performed by the interrupt control described below, select a weighing machine that additionally supplies the article, for example, a weighing machine whose weight is less than a predetermined weight (step P 1s ) e(5) Next, a delay timer is set. Storing the pool hopper delay time in the memory (step Px7) *This is 1. If the computation request flag CFa is H, it is stored in the memory DTa, and if the flag CFb is H, it is stored in the memory DTb. Subsequently, a command signal for starting interrupt processing 2 is output to the interrupt control section as explained in the flowchart of FIG. 4 (step P1).
a) In other words, if the computation request flag CFa is H, interrupt processing 2a [Fig. 4(C)] is executed, and if the flag FF is H
If so, interrupt processing 2b [FIG. 4(d)] is activated. Here, if both flags CFa and CFb are H, the OR of the discharge combinations Pa and Pb is taken as the discharge combination Pc.
It is also possible to output a command signal that activates only the interrupt processing 2a (or only 2b). When such processing is performed, it is possible to control the opening of two sets of pool hoppers and the starting of feeders with one interrupt processing, which has the advantage of improving execution efficiency. Note that the interrupt processing is performed for a predetermined period of time after the start command is output until the stop command is output, for example, 25m5.
Do it every time.

(6) Next, the stability time is stored in the weighing stability timer memory of the weighing machine corresponding to the opening of the weighing hopper gate (step Pt5), and then the non-discharge count memory of the weighing machine corresponding to the opening of the weighing hopper gate is cleared to zero, The other non-discharge count memories are incremented by 1 (step P2 o), and the computation request flags CFa and CFbftL for which the recall and combination computations have been completed are set (step P2 o).
2t), calculation request flags CFa and CFb are both L.
If both flags are L, the weighing machine of the discharge combination, the discharge weight, etc. are displayed (step Pzg), and the process returns to step A.

Figure 4 is a flowchart for 1 interrupt processing.
Next, this flowchart will be explained.

(1) The interrupt processing 1a outputs a command from the interrupt control section to the CPU for execution every time the timing signal TSa from the packaging machine a is input to the interrupt control section. This process includes step A1) to output an open signal for timing hopper a;
The calculation start delay time is stored in the delay timer memory DTa (step A2), the ejection completion signal delay time is stored in the ejection completion timer memory ETa (step A5), and the interrupt control section executes the interrupt processing described below. 2a is output (step A4).

(2) Similarly to interrupt processing 1a, interrupt processing 1b also uses packaging a
Each time the timing signal TSb from b is input to the interrupt control section, one interrupt control section outputs a command to the CPU for execution. This process includes outputting an open signal for the timing hopper b (Step B-), storing the calculation start delay time in the delay timer memory DTb (Step B2), and storing the discharge completion signal delay time in the discharge completion timer memory ETb (
Step B3), interrupt processing 2 explained next to the interrupt control unit
A command signal for activating the controller b is output (step B4).

(3) The interrupt processing 2a outputs a command from the interrupt control unit to the CPU every predetermined period of time, for example, every 25 m5, between when the start command and the stop command are output from the CPU, and causes the CPU to execute the command (the flowchart shown in Fig. 3). (See the explanation of step pea and step A4 of the flowchart of FIG. 4).

■ Decrement the memory value of delay timer memory DTa) (
-1) Yes (Step C1) 0 Next, check whether the value stored in the delay timer memory DTa is 0, that is, whether the time has expired (Step C2). If the time has been up, ! (extension mode) is checked (step CS).

If it is the calculation start mode, set the calculation request flag CFa to H and output a stop command signal for interrupt processing 2a to the step C4) 1 interrupt control unit (step C5). ■If the delay mode is the pool hopper open mode For example, if the feeder is in operation, a feeder stop signal is output (step C6). This is because if the pool hopper is opened or closed while the feeder is in operation, objects will be caught. output a pool hopper open signal of the weighing machine or the weighing machine selected for additional supply (step C7);
This causes the article to be placed into the weighing hopper. Control, feeder start delay time delay timer memory DT
a (step C8).

■If the delay mode is the feeder start mode, output a feeder start signal to each feeder corresponding to the opening of the pool hopper (step C9).Next, store the feeder operation time in the feeder memory FT of each started feeder ( Step Cro)-(4) Interrupt processing 2b is also executed by outputting a command from the interrupt control section to the CPU every predetermined time period, for example, every 25 m5, between the output of a start command and a stop command from the CPU. After the value stored in the delay timer memory DTb is decremented (-1) (step D1), the processing in [B] is performed in the [A3 section (steps 02 to C1G) of 1 interrupt processing 2a].
Do the same thing.

(5) Interrupt processing 3 is executed by the CPU at all times, for example, every 25m5.
have it executed. This process decrements (-1) the stored value of the feeder timer memory FT, which is provided for each feeder in order to vary the operating time of each feeder, if it is 1 or more (step El).
*Next, by this decrement, check whether there is any memory whose stored value has become zero (step E2),
A stop signal is output to the feeder corresponding to the feeder timer memory FT that has become zero (step E3).

(6) Interrupt processing 4 is also always 1, for example, every 25 m5 CPU
have it executed. This process decrements (-1) the value stored in the discharge completion timer memory ET whose stored value is 1 or more.
, (Step F1), check whether there is a memory whose storage value has become zero due to this decrement (Step F2), if there is a memory with zero value, this memory is E
Check whether there is □ in Ta (step F3), '8 If the corresponding memory is ETa, output the discharge completion signal ESa to the packaging device 1a.Step F3
4) If the memory in question is not ETa, i.e. ETb
In this case, a discharge completion signal ESb is output to the packaging machine (step F5).

(7) Interrupt processing 5 is always executed, for example, every 25 m5, and the measurement stability timer memory W whose stored value is 1 or more
Decrement (-1) the stored value of T (step G
s) e If one interrupt processing 3.4.5 is commanded at the same time, the CPU is controlled so that one of the processings is executed with priority and the other processing is executed after that.

The above explanation is about the operation of the interlocking operation control device between the combination weighing device and the packaging machine, but the interlocking operation control between the combination counting device and the packaging machine is also shown in Figure 1.
A target number setting section is provided in the controller, and the arithmetic control section divides the weight input from each weighing machine by a preset weight per unit number (unit weight) to convert it into a number of pieces, and calculates the discharge combination by performing a combination calculation. This can be carried out in the same way as in the case of a combination weighing device by discharging the article from the corresponding weighing machine.

As explained above, in the present invention, each time the timing signals TSa and TS b (1) are input from each packaging machine, the calculation request flags CFa and CFb are set to H by the interrupt processing of the calculation control section, and the main Check the flag at an appropriate position in the program or subprogram, and if the flag is H, input the weight from each weighing machine, perform one combination calculation, find the discharge combination, and open the weighing hopper of the corresponding weighing machine. The subsequent processes, such as opening the pool hopper of the weighing machine that discharged the article and controlling the operation of the feeder, are performed by interrupt processing. Therefore, even if the timing signals TSa and TSb from each packaging machine are input asynchronously, the signal TSa
, TSb can be matched to perform combination measurement or combination counting. That is, as shown in FIG. 5, the timing signals TSa, TS of each packaging machine are
Even if b is different from each other, in other words, even if each packaging machine has a different processing capacity, the packaging machines can be operated independently.

(Effects of the Invention) As described above, according to the present invention, there is no need for electrical connections or synchronization devices for operating each packaging machine in synchronization.
Equipment costs can be reduced. Furthermore, even if there is a difference in the throughput of the packaging machines, each packaging machine can be operated independently, so that it can be operated efficiently.

[Brief explanation of the drawing]

Fig. 1 is a schematic block diagram of the interlocking operation control device for the combination weighing device and packaging machine of the present invention, Fig. 2 is a block diagram of the memory, and Figs. 3 and 4 (a) to (g) are flowcharts. , Fig. 5 is a characteristic diagram of the timing signal, Fig. 6 is a schematic mechanical diagram of the combination weighing device, □ Fig. 7 (a), (b)
is an explanatory diagram of a conventional example. A: Feeder, B: Weighing machine, C: Multiplexer, D: A/D converter, E: Arithmetic control unit,
F... Upper limit weight setting section, G... Target weight setting section, H
...display section, I...packaging 4m.

Claims (1)

[Claims] Multiple weighing machines measure the weight of articles, the weight from each weighing machine is input, a combination calculation is performed according to a predetermined pattern, a discharge combination that satisfies certain conditions is selected, and the article is transferred to the selected weighing machine. a calculation control unit that outputs a discharge signal;
A combination weighing device or combination counting device having a plurality of discharge chutes for transferring articles discharged from a weighing machine to a plurality of packaging machines, and a plurality of packaging machines,
The above combination calculation is started by the timing signal from each packaging machine, a discharge combination is selected, and the weighing machine selected for the discharge combination loads the article into the discharge chute corresponding to the packaging machine to which the timing signal was output. A combination of a combination weighing device or a combination counting device and a plurality of packaging machines, characterized in that the supply of new goods to the weighing machine from which the goods have been discharged is controlled by interrupt control to the arithmetic control unit. Interlocking operation control device.