JPH0658247B2 - Combination weighing device or combination counting device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a combination weighing device having two discharge chutes for interlocking with a twin type packaging machine, or an interlock switching device between a combination counting device and a packaging machine. .

(Prior Art) In the recent distribution industry and the like, an apparatus for weighing and packaging articles to be weighed by using a combination weighing apparatus or a combination counting apparatus and a packaging machine arranged in close proximity thereto has been put into practical use. ing. FIG. 7 is an example of such a device, and is a schematic configuration diagram of a combination weighing device having two discharge chutes for interlocking with a twin type packaging machine. In the upper frame 2 arranged above the frame 1 in the figure,
The dispersion table 4 is attached together with the electromagnetic vibration device 3 at a position corresponding to an input port of an article to be weighed (not shown).
The articles to be weighed are dispersed by the dispersion table, and the feeder 5
It is supplied to a large number of pool hoppers 7 arranged radially through a trough 6 driven by. When the motor 11 is activated, the drive unit 10 operates and the link mechanism 10a opens the pool hopper to load the articles into the weighing hopper 9. The weight of the article is weighed by a weight detector 8 such as a load cell, and this weight is combined and calculated by a calculation control unit (not shown) to select a weighing machine which is an optimum combination for the target weight. After that, the drive device operates again and the link mechanism 10
b, 10c to open the A-side gate 9a or the B-side gate 9b of the weighing hopper, and discharge the article to the shoe A of the chute 12.
12a or chute B12b. The discharged articles are transferred to a twin-type packaging machine provided corresponding to each chute, and subjected to packaging processing.

The twin type packaging machine has the configuration shown in FIGS. 3 and 4. FIG. 3 shows a twin-type packaging machine of the simultaneous packaging type, in which the timing signals A and B of the A-side gate and the B-side gate of the weighing hopper are simultaneously output, so that the articles are discharged from the chute A and the chute B at the same time. Two
The pack is packaged at the same time. FIG. 4 shows a twin-type wrapping machine of an alternating wrapping type, in which the timing signals A and B of the A-side gate and the B-side gate of the weighing hopper are alternately output, and the articles discharged from the chutes A and B are alternately output. It is to be packed in a pack.

(Problems of the Prior Art) As described above, since there are two types of twin-type packaging machines, that is, the simultaneous packaging type and the alternating packaging type, the combination weighing device requires two types that are interlocked with each other.
That is, in order to interlock with the simultaneous packaging type, the articles must be discharged simultaneously to the two chutes A and B,
Further, in order to interlock with the alternating packaging type, it is necessary to alternately discharge the articles to the two chutes A and B. For this reason, the manufacturer needs to manufacture two types of combination weighing devices, and the user must also replace the combination weighing device when the type of packaging machine is changed, which is a factor of high cost.

(Object of the Invention) An object of the present invention is to use one combination weighing device or combination counting device, which switches between simultaneous discharge or alternate discharge according to a timing signal from a packaging machine to discharge an article, and has different types. Another object of the present invention is to provide an interlocking switching device for a packaging machine and a combination weighing device or combination counting device that can interlock with the packaging machine.

(Summary of the Invention) A combination weighing device or a combination switching device of a combination counting device of the present invention and a packaging machine has two discharge chutes, and articles to be weighed from a plurality of weighing machines that operate in conjunction with the packaging machine. Or a combination weighing device that discharges articles from a discharge chute via a corresponding weighing machine, by calculating a discharge combination that is the optimum combination for the target weight or the target number. In the combination counter, when two timing signals from the packaging machine are input at the same time, the two ejection combinations eject two articles simultaneously from the two ejection chutes, and the two timing signals from the packaging machine alternate. When the timing signal is input, the articles are alternately discharged to one discharge chute by one discharge combination each time the timing signal is input. It Further, as an embodiment thereof, (1) In the case of the simultaneous discharge, the combination calculation is performed twice in one weighing (counting) cycle to obtain two discharge combinations.

(2) In the case of the alternate discharge described above, the combination calculation is performed with the weighing machine that was not discharged in the previous weighing (counting) cycle,
Find a set of emissions combinations.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. First
The figure is a schematic block diagram of the present invention. In the figure, the weights W _{1 to} W _n of the articles to be weighed by the plurality of weighing machines a having the A-side gate and the B-side gate in the weighing hopper are input to the multiplexer b. When the timing signals A and B from the packaging machine g are input to the arithmetic control unit d configured by a microcomputer or the like, a multiplexer switching signal is sent from the arithmetic control unit and the weights W _{1 to} W _n are sequentially A / D. It is converted into a digital value through the converter C, read into the arithmetic control unit d, and the weights W _{1 to} W _n are stored in the memory. The calculation control unit performs a combination calculation in a predetermined pattern, and among the combinations that are equal to or more than the target weight set by the target weight setting unit f and do not exceed the upper limit weight set by the upper limit weight setting unit e,
A combination equal to or close to the target weight is selected as the optimum combination. From the arithmetic control, send a drive signal to the A side gate and B side gate of the weighing hopper of the corresponding weighing machine,
Eject the article. The memory of the arithmetic control unit includes an area for storing the weights W _{1 to} W _n from each weighing machine, a count timer memory, flag memories FA, FB, areas AM, PMA, PMB, etc. for storing weighing machines of discharge combinations. It is provided.

In the present invention, in response to the fact that either or both of the timing signal A and the timing signal B from the packaging machine are sent to the arithmetic control unit, only the A side gate and the B side of the discharge combination weighing machine are provided. Only the gate, or any pattern in which both the A-side gate and the B-side gate are opened is formed. Next, the operation of the present invention will be described with reference to the flowchart of FIG. 2 showing the processing procedure.
(1) It is checked whether the timing signal from the packaging machine is input to the arithmetic control unit (step P ₁ ). Next, the timer time T is stored in the counter timer memory (step P ₂ ). The timer time T has a value corresponding to, for example, 50 ms. Then, the input signal from the packaging machine is
It is checked whether it is the timing signal A (step P ₃ ). If the timing signal A is input, then it is confirmed whether or not the timing signal B is also input (step P ₄ ). If the timing signal B is not input, the value of the counter timer memory is checked. as -1 (step P _5), counter to the timer memory value becomes 0 (step P _6), repeated loop process, the counter timer memory value reached 0, the flag memory FA to "H" ( step _P 7).

(2) in step P _3, the input from the packaging machine is so that the timing signal B is inputted when it is not the timing signal A, and checks whether it is again, the timing signal A is input (step P ₈ ), If the timing signal A is input, the process proceeds to the processing port, and if the timing signal A is not input, the value of the counter memory is decremented by 1 (step P ₉ ). Room processing is repeated until it becomes 0 (step P
₁₀ ). If the value of the counter memory is accustomed to 0, the flag memory FB to "H" (step _P 11).

(3) After the flag memory FA or FB to "H", and stores the sequentially input weight _W 1 to _W-n from each weighing machine (step _P 12). Next, a predetermined number of weighing machines are selected from the weighing machines not previously selected as the discharge combination (step P ₁₃ ). This predetermined number of units is selected to be 10 at maximum, assuming that the total number of weighing machines is 14, for example.

For the selection of the weighing machine, for example, a predetermined number of machines are selected in the ascending order of discharge frequency. Subsequently, a combination calculation is performed based on the weights from the selected weighing machines, and a combination of the combination weight which is equal to or more than the target weight and does not exceed the upper limit weight and is equal to or close to the target weight is obtained as the discharge combination PM ( Step P ₁₄ ).

If the discharge combination is not required, the pool hopper of the weighing machine having a predetermined weight or less is opened and the article is additionally loaded (step P ₃₂ ). If the discharge combination is required, the flag memory F
Check A and FB (step P ₁₆ ), FA =
If "H", the discharge combination PM in memory is stored as a PMA to the processing of C (step _{P 18),} also FB
= “H”, the discharge combination PM is stored in the memory as PMB, and the process proceeds to step D ₁₇ (step P ₁₇ ).

As described above, when the timing signal is not generated within the predetermined time T, steps P8, P9 ...
As shown in the flow of ..., when the timing signal A is generated from the packaging machine, the gate on the A side of the weighing hopper is opened,
When the timing signal B is generated from the packaging machine, the weighing hopper B opens the gate and discharges the articles accumulated in these weighing hoppers to two packaging machines.

(4) Check the input of the timing signal A in step P _3,
Further, when the input of the timing signal B is confirmed in step P ₄ , the timing signals A and B are simultaneously input to the arithmetic control unit,
Alternatively, it means that the input is made within the time T (for example, the value corresponding to 50 ms) set in step P ₂ . 50 ms when timing signals A and B are input simultaneously
Since the timing signal is generated by the micro switch on the packaging machine side, the contacts do not completely contact at the same time even if the micro switches are mechanically turned on at the same time. This is because the time width is necessary.

When the timing signals A and B are simultaneously input, the weights W _{1 to} W _n are sequentially input from the respective weighing machines and stored in the memory (step P ₁₉ ), and the predetermined number of units to participate in the combination calculation, for example, the maximum. selecting the ten weighing machine (step _P 20). Next, a combination calculation is performed based on the weights from the selected weighing machines, and a set of combinations in which the combination weight is equal to or greater than the target weight, does not exceed the upper limit weight, and is equal to or close to the target weight is obtained as the discharge combination PMA ( Step P ₂₁ ). Subsequently, it is checked whether or not the discharge combination PMA is calculated (step P ₂₂ ), and if the discharge combination PMA is calculated, the discharge combination PMA is calculated.
A predetermined number of weighing machines, for example, a maximum of 10 weighing machines are selected from the weighing machines that have not been selected (step P ₂₃ ). If the emission combination PMA has not been obtained, a predetermined number of weighing machines, for example, a maximum of 10 weighing machines are selected including the weighing machines not selected in step P ₂₀ (* ₁ ) with priority (step P ₂₄ ). .

(5) performs a combination calculation by the weight of the selected metering press in Step P ₂₃ or step P _24, the target weight or more, does not exceed the upper limit weight, equal to the target weight or a set of combinations close to the target weight Is calculated as the discharge combination PMB (step P ₂₅ ). Next, it is checked whether the discharge combination PMB has been obtained (step P ₂₆ ), and if the discharge combination PMB has been obtained, the discharge combination PMB is obtained.
It is checked whether both A and PMB have been obtained (step P ₂₇ ). If both the discharge combinations PMA and PMB are obtained, the A-side gate of the weighing hopper of the computer selected as the discharge combination PMA and the discharge combination PM
The gates on the B side of the weighing hoppers of the weighing machine selected as B are simultaneously opened to discharge the article (step P ₂₈ ). When only the discharge combination PMB is required, only the B-side gate of the weighing hopper of the weighing machine selected for this is opened and the article is discharged (step P ₂₉ ).

(6) when the discharge combination PMB was not determined in step P _26, then the discharge combination RMA checks whether obtained (step P _30). If the discharge combination PMA is not required, for example, the pool hopper of the weighing machine having a predetermined weight or less is opened to additionally supply the article (step P ₃₂ ). If the discharge combination PMA is required, the A side gate of the weighing hopper of the weighing machine selected for this is opened and the article is discharged (step P).
₃₁ ).

(7) Open the pool hopper of the weighing machine with the weighing hopper opened and supply the articles to the weighing hopper (step P ₃₃ ). Also,
The feeder corresponding to the weighing machine with the open pool hopper is operated to supply the articles to the pool hopper (step P
₃₄ ). Then the flag memory FA, the FB in the "L" (step _{P 35),} the process returns to Lee.

Although the above description relates to interlocking switching between the combination weighing device and the packaging machine, the present invention can be similarly implemented in the combination counting device. The combination counter is
The weight from each weighing machine is divided by the weight (unit weight) per unit number and converted into the number, and the combination calculation is performed to obtain the optimal combination for the preset target number. Is to be discharged from the weighing machine in accordance with a timing signal from the packaging machine, and either the A side gate or the B side gate of the weighing machine or both of them are opened to release the article. Since it is discharged, it operates in the same manner as the combination weighing device, and a description thereof with a block diagram and a flowchart is omitted.

Further, although the description so far has been made on the twin type packaging machine, as shown in FIG. 5, two single type packaging machines can be operated simultaneously or alternately in synchronization. . That is, also in the figure, one of the packaging machines outputs the timing signal A and the other packaging machine outputs the timing signal B, and accordingly, either or both of the A-side gate and the B-side gate of the weighing hopper are simultaneously output. It is opened to discharge the article.

Further, when the packaging machine alternately outputs the timing signals A and B, the pulse intervals t ₁ and t ₂ are made the same as shown in FIG. 4 and different intervals are made as shown in FIG. The case is also included.

(Effects of the Invention) As described above, in the present invention, in the combination weighing device or the combination counting device which has two discharge chutes and works in conjunction with the packaging machine, two timing signals from the packaging machine are simultaneously supplied, Or, in response to the input alternately, the articles are discharged simultaneously or alternately from the discharge chute through the weighing machine of the discharge combination that is optimal for the target weight or the target number. With the combination weighing device or the combination counting device, it is possible to work with different types of packaging machines for simultaneous packaging or alternating packaging, and it is possible to reduce the cost.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of the present invention, FIG. 2 is a flowchart showing a processing procedure of the present invention, and FIGS.
FIG. 6 is an explanatory diagram of interlocking between the packaging machine and the combination weighing device (counter), FIG. 6 is an explanatory diagram of timing signals, and FIG. 7 is a schematic configuration diagram of the combination weighing device (counter) having two discharge chutes. Is. a ... Weighing machine, b ... Multiplexer, c ... A / D converter, d ... Calculation control section, e ... Upper limit weight setting section, f ...
… Target weight setting unit, g …… Packing machine.

Claims (3)

[Claims] 1. A combination weighing system in which an optimum combination for a target weight or a target number is obtained according to requests from two packaging machines, and the objects of the obtained optimal combination are discharged to each of the two packaging machines. In the apparatus or the combination counting device, a discriminating means for discriminating whether or not the timing signals for prompting the discharge of the objects to be weighed are simultaneously outputted from the two packaging machines or alternately outputted, and when the discrimination results are simultaneous, 2 After finding the optimum combination of sets, discharge the objects to be weighed to each packaging machine,
A combination weighing device comprising: a control means for discharging the objects to be weighed to the packaging machine on the side where the timing signal is output each time one optimal combination is obtained when the determination results are alternating. Combination counter. 2. When the timing signals from the respective packaging machines are simultaneously output, the combination calculation is performed twice in one weighing (counting) cycle to obtain two optimum combinations. Item 2. The combination weighing device or counting device according to Item 1. 3. When the timing signals from the respective packaging machines are alternately output, the combination calculation is performed by using the weight or the number of the objects to be weighed which have not been discharged in the previous weighing (counting) cycle. The combination weighing device or combination counting device according to claim 1, wherein one set of optimum combinations is obtained.