JPS63168516A - Combination weighine apparatus - Google Patents

Abstract

PURPOSE:To enhance the operating efficiency of the titled apparatus, by providing a correction value memory means storing a zero point correction value at every hopper when a set amount of aritcles to be weighed such as food indivisualy varied in a wt. are charged in each hopper. CONSTITUTION:A combination control apparatus is constituted of a mechanical part 30 and a control apparatus 40 and, when a weighed value operation means 42 is set to a zero tracking operation mode by the operation mode change-over means 46 received in the control apparatus 40, a zero tracking control means 47 is used to set a new zero point correction value to a correction value memory means 41a and the wt. or number of the artifles to be weighed received in each receiving chamber 31 is calculated. When the means 42 is set to a deviation operation mode, the weighed value signal from a weighing means 34 immediately before the articles to be weighed are received is stored in a weighed value memory means 41b by deviation measuring control means 48 at each time when the articles to be weight are received in a weighing hopper 32 and, in the same way, the articles to be weighed in each receiving chamber 31 are calculated. Thereafter, a wt. and number combination selecting means 43 is operated by weighed value operation means 42 and the articles to be weighed are sent to the mechanical part 30 using a discharge control means 44.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Application Field of the Present Invention The present invention relates to a combination weighing device that discharges objects to be weighed, such as foods, having individual weight variations, in a set amount.

<Prior art> (Figs. 10 and 11) When combining multiple sets of objects to be weighed that each have variations in weight and combining them into a set amount or a set number of items, the larger the number of combinations, the higher the set weight or setting. Since it is possible to increase the accuracy of the combined weight or the combined number of items, a combination totaling ffl device as shown in FIG. 10 has been used in the past, for example.

That is, the objects to be weighed are supplied from the plurality of feeders 1-1 to 1-n to intermediate hoppers 2-1 to 2-n, respectively, through discharge gates 3 provided on both sides of intermediate hoppers 2-1 to 2-n. −
When 1 to 3-2n are opened, they are stored in weighing hoppers 4-1 to 4-211 provided below, respectively, 21!1.

One weighing device 10-1 to 10-n is installed in each of the two weighing hoppers 4-1 to 4-n. The weight value of the device 11 is also controlled based on the weight value signal from one weighing device.
It is calculated by the measured value calculation means 12.

FIG. 11 shows a circuit showing the measured value calculation means 12-1 corresponding to the measuring instrument 10-1.

In the figure, 13-1 indicates an empty weighing value signal when no object to be weighed is stored in the weighing hopper 4-1.4-2.
This is a correction value storage device that stores in advance a measured value signal (hereinafter referred to as a zero point correction value) based on the self Φ amount, etc., via the switch 14-1.

15-1 is a first subtracter that subtracts the zero point correction value from the weight signal when the object to be weighed is stored in the weighing hopper on the right side; 16-1 is the first subtracter 15-1; From the output,
This is a second subtracter that subtracts the weight value (stored value) of the weighed object stored in the weighing hopper on the other side.

17-1.18-1 inputs the subtraction result of the second subtractor 16-1 via the switch 19-1.20-1,
A weight storage device 21-1 stores the weight Wi value of the object to be weighed stored in each weighing hopper 4-1, 4-2, and stores the weight ffi value stored in the weight storage device 17-1.18-1.
This is an adder that adds the value and outputs it to the second subtracter 16-1.

Note that the stored content of this weight storage device 17-1.18-1 is reset to 110H when the object to be weighed stored in the corresponding weighing hopper 4-1.4-2 is discharged.

Therefore, when an object to be weighed is stored in the weighing hopper 4-1 from the intermediate hopper 2-1 while both weighing hoppers 4-1 and 4-2 are empty, the weighing value signal from the weighing instrument 10-1 is ,
The first subtracter 15-1 subtracts the zero point correction value, and the second subtracter 16-t subtracts the output of the adder 21-1 (in this case, "o").
”> is reduced. This reduced brightness is reduced by weighing hopper 4-1.
As the weight value of the object to be weighed stored in the switch 19-
1 and stored in one weight storage device 17-1.

Next, when the object to be weighed is stored in the weighing hopper 4-2, the zero point correction value is similarly subtracted from this weighing value signal and stored in the weight memory 17-1 by the second subtractor 16-1. The stored value (the weight value of the object to be weighed stored in the weighing hopper 4-1) is reduced, and this reduction result is stored in the weighing hopper 4-1.
The jlffi value of the object to be weighed stored in the weight storage device 18-1 is stored in the other weight storage device 18-1 via the switch 20-1.

In this way, the weight value of the object to be weighed stored in each of the weighing hoppers 4-1 to 4-4 is determined by the weighing if effect numbing means 12, and each weight value is output to the combination selection means 25. .

The combination selection means 25 performs a combination calculation of each weight value, selects, for example, a combination with the smallest difference from the set weight, and sends a selection signal for this selected combination to the discharge control means 26.

The discharge control means 26 sends out a discharge signal to open the discharge gate of the weighing hopper storing the selected object to be weighed, and sends the selected object to be weighed to the collection chute 28.
It is collected and discharged through.

In addition, the supply control means 27 that receives this discharge signal causes the intermediate hopper to supply a new object to be weighed to the empty one-hung hopper, and causes the feeder to supply the object to be weighed to the empty intermediate hopper. .

As described above, the objects to be weighed are sequentially supplied to the empty weighing hopper after the combination has been selected, but during this time,
Combination calculations are performed on the objects to be weighed stored in the weighing hoppers for which weighing and measurement have been completed, and the objects to be weighed are sequentially collected and discharged.

Therefore, the measured value signals from each of the measuring instruments 10-1 to 10-n greatly drift due to changes in ambient temperature and elapsed time. In addition, residues of objects to be weighed may adhere to the weighing hoppers 4-1 to 4-2n without being discharged for a long time.

Therefore, in conventional combination weighing devices, the operation of the device is temporarily stopped at any time to prevent weighing errors caused by drift of the weighing device or crumbs of the objects to be weighed adhering to the weighing hopper. The weighed object is discharged by manual operation, etc., and the switch 14 of each weighed value calculation means 12 is pressed.
-1 to 14-n are turned on, and the measuring instruments 10-1 to 10-
The zero point correction value is reset every n (hereinafter referred to as zero tracking).

Problems to be Solved by the Present Invention> However, in manual zero tracking as described above, each measuring instrument 10-1 to 1 is
Since it is not possible to precisely respond to 0-n drifts, measurement errors occur.

Further, it is extremely troublesome to stop the operation of the device and manually perform zero tracking on all the measuring instruments frequently, and there is a problem in that the device operating rate is significantly reduced.

Furthermore, when weighing objects to be weighed such as pickles that contain a lot of water and tend to adhere to the weighing hopper, for example, the objects to be weighed stored in the pair of weighing hoppers 4-t and 4-2 may be combined. Selected, both discharge gates 6-1.6-
Even though hopper 2 is opened, a part of the wave-weighed object may remain on the side of weighing hopper 4-2.

If a new object to be weighed is stored in the weighing hopper 4-1 side in this state, the weight value of the remaining 9 remaining objects to be weighed in the weighing hopper 4-2 side and the weight value of the remaining 9 objects to be weighed actually stored in the weighing hopper 4-1. The total value of the weight value of the object to be weighed is calculated by the weighing Pf4 calculating means 12-1.
The weight is stored in the weight storage device 17-1.

Furthermore, once the stored value of the weight storage device 17-1 includes an error due to the residual amount, even if this residual object to be weighed is discharged, both weighing hoppers 4-1, 4-2 Until it is completely emptied, the weight value stored in the weight memory 17-1, 18-1 will always include the WA difference due to this residual amount, and weighing errors will constantly occur. I end up.

In addition, if a zero tracking operation is performed with a residual object to be weighed, even if the remaining object to be weighed is discharged after this zero tracking operation, the zero point including the weight of the remaining object will remain until the next zero tracking operation. Since a measuring instrument is used based on the correction value, measurement errors occur.

Therefore, there has been a problem in that it is not possible to weigh objects to be weighed, particularly those that have residual properties, with high precision.

OBJECTS OF THE INVENTION The present invention has been made in view of the above-mentioned problems. It is an object of the present invention to provide a combination weighing device that is capable of weighing even residual objects to be weighed with high precision, with less reduction in device operating rate due to tracking operations.

Means for Achieving the Above-mentioned Object> (Fig. 1) In order to achieve the above-mentioned object, a control device 4 for a combination weighing device of the present invention is provided.
0, as shown in FIG. 1, weighing hoppers 32.32, . . ., which have a plurality of storage chambers 31.31, . . . Correction value storage means 41a, 41a, . . .
・Measuring means 34.34, . . . immediately before the h1 hanging object is supplied from the supplying means 33.33, . . .
・Mffi value record・n means 4 for storing the weighing value signal from
1b, 41b, . . . and measuring means 34.34,
From the measured value signal from ......, the correction value storage means 4
1a, 41a, . . . based on the value obtained by subtracting the zero point correction value stored in the weighing hoppers 32, 32, .
A first calculation mode (hereinafter referred to as zero tracking calculation mode) for calculating at least one of the weight value or the number of pieces of the objects to be weighed stored in..., and the weighing means 34.3.
4. Weighing from weighing hoppers 32, 32, .・
. . . A second calculation mode (hereinafter referred to as deviation measurement calculation mode) for calculating at least one of the weight value or the number of pieces of the objects to be weighed stored in the weighing value calculation means 42.
42,..., and the weighing value calculation means 42.42...
Combination selection means 43 that selects a combination that is close to or equal to at least one of the set weight or the set number of objects based on at least one of the weight value or the number of pieces calculated by . Room 31.31,
35.3 Discharge means provided independently for each
5,... All the storage chambers 31 included in the combination selected by the combination selection means 43,
Discharge control means 44 for discharging the objects to be weighed
．． 44,... and supply means 33.33,...
Supply control means 45, 45, . . . , which controls . . . and weighing value calculation means 42.42, calculation mode switching means 46.4 for switching between the first and second calculation modes of...
6,... and the weighing value calculation means 42.42,...
When .
The zero tracking control means 47.47, . . . for storing and setting a new zero point correction value in the . When performing calculations, the weighing hoppers 32, 32,
Every time an object to be weighed is stored, the weighing value signal from the weighing means 34, 34, .・deviation measurement control means 48, 48, . . .

<Operation> Therefore, the calculation mode switching means 46, 46, . . .
The weighing value calculation means 42.42,...
is performing the metrological calculation in the first calculation mode (zero tracking calculation mode), the correction value storage means 41a141a, . . . While new zero point correction values are sequentially stored and set in each storage chamber 31, 31,...
At least one of the weight value or the number of pieces of the object to be weighed stored in ... is calculated.

Also, the weighing value calculation means 42.42, . . . are switched to the second
When performing weighing in the calculation mode (deviation measurement calculation mode), the deviation measurement control means 48, 48,
..., the object to be weighed is placed in the weighing hopper 32.32
, . . . , the measurement value signals from the measurement means 34, 34, . . . immediately before storage are stored in the measurement value storage means 41b, 41b, . The weighing means 34, 34, . . .
Measured value storage means 41b14 from measured value signals from...
Based on the value obtained by subtracting the stored value of 1b, . be done.

Next, based on at least one of the weight value or piece value of the objects to be weighed in each storage chamber 31.3L... calculated by the weighing value calculation means 42.42,... , is close to at least one of the set weight or set number of pieces, or
Or, an equal combination is selected by the combination selection means 43, and all objects to be weighed in the storage chambers included in the selected combination are discharged by the discharge control means 44, 44, . A new object to be weighed is stored in the chamber by the supply control means 45, 45, . . . .

An embodiment of the present invention (Figures 2 to 6) Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 2 is a schematic diagram showing the overall structure of the structure of a combination weighing device according to an embodiment of the present invention, and FIG. 3 is a block diagram showing the overall structure of the control device.

In FIG. 2, reference numeral 51 indicates a circular feeder 5 in which objects to be weighed are sequentially fed.
This is a supply device that supplies to 2. Eight intermediate hoppers 54-1 to 54-8 are arranged in a circle below the periphery of the circular feeder 52, and objects to be weighed are sequentially supplied through the feeders 53-1 to 53-8, respectively.

Weighing hoppers 57-1 to 57-8 are installed below the intermediate hoppers 54-1 to 54-8, respectively, and each of the weighing hoppers 5-1 to 5-B is partitioned at the center. and two storage chambers 58-1 to 58-, respectively.
8, 59-1 to 59-8 are provided.

The objects to be weighed stored in intermediate hoppers 54-1 to 54-B are discharged through discharge gates 55-1 to 55-8, 56-1 to 56-8
When opened, storage rooms 58-1 to 58-8, 59-
1 to 59-8 and is stored.

The weighing hoppers 57-1 to 57-B each have a weighing device 6.
0-1 to 60-8 are provided, and the weight of any of the items stored in the two storage chambers is detected by one measuring device.

A collection chute 63 is installed below the weighing hoppers 57-1 to 57-8. Each weighing hopper 57-1 to 58
-8 to be weighed is the discharge gate 6, respectively.
When 1-1 to 61-8 and 62-1 to 62-8 are opened, they fall into the collection chute 63.

A wrapping device 165 is installed below the collection chute 63. At the bottom of the collection chute 63, a timing hopper 64 is provided which opens at regular intervals.

Next, the control device of this rough adjustment weighing device will be explained. FIG. 3 is a schematic diagram showing the m control device 100.

In the figure, the measurement signals from the measuring instruments 60-1 to 60-8 are the measurement value calculation circuits 110-1 to 110-1 of the control device 100.
110-e. Metric IN calculation circuit 110-1~
In step 110-a, the @ suspension of the object to be weighed stored in each of the storage chambers 58-1 to 58-8 and 59-1 to 59-8 of the weighing hoppers 57-1 to 57-8 is calculated.

Here, the measured value calculation circuit 110-t is configured as shown in FIG. 4, for example.

In the figure, the measured value signal from the measuring instrument 60-1 is the first
and is input to the second frame reducer 111-1.112-t. In the subtracter 111-1, from the input measurement value signal,
The stored value stored in the arithmetic storage unit 113-r is devalued.

The output of the subtracter 111-r is input to a third subtracter 114-1. In the third subtracter 114-t, the output of the adder 120-1 is subtracted from the input value.

The output of this adder 120-1 is also input to the second frame reducer 112-r, and the subtracter 112-1 uses this addition from the measured value signal from the measuring device 60-1. The output of the device 120-1 is reduced, and the result of this subtraction is stored and set in the arithmetic storage device 113-1 via the switch 122-1.

First subtractor 111-1 and third subtractor 114-1
The output is selected by switch 115-t and selected by switch 116
-1.117-t via weight storage 118-1.1
19-r.

The weight storage device 118-1.119-t is connected to the weighing hopper 57.
Corresponding to the storage chamber 58-1 and 59-1, the weight value of the object to be weighed is stored, and when the object to be weighed is discharged (i.e., the discharge signal C-1 to be described later) is stored. , D=t), the memory contents are reset accordingly, and the memory contents are retained even if the device power is turned off.

Both stored values of both weight storage devices 118-1.119-t are multiplied by an adder 120-r, and outputted to the second and third subtracters 112-1.114-t, It is sent to the combination selection circuit 130.

In addition, the switch 116-sG, t is turned ON by a weighing timing signal A-1 from a discharge/supply sub-circuit 150-*, which will be described later, indicating the timing of weighing when the object to be weighed is supplied to the storage chamber 58-1. It's a switch. Similarly,
The switch 117-1 is a switch that is turned on by a weighing timing signal B-1 indicating that the object to be weighed has been supplied to the storage chamber 59-1 and the measurement thereof has been completed.

The switching of the switch 115-1 is controlled by the output obtained by inverting the mode switching signal Y-1, which will be described later, by the inverter 121-+, and when the output of the inverter 121-1 is at the °'L'' level, the first subtraction is performed. When the output of the inverter 121-! is at the "H" level, it is connected to the output side of the third subtracter 114-1.

Further, the opening/closing of the switch 122-1 is controlled by the AND circuit 123.
-+, and turns ON when the output of the AND circuit 123-t is at the IH19 level, and turns OFF when the output of the AND circuit 123-t is at the 111'' level.The output of the inverter 121-1 is connected to one input terminal of the AND circuit 123-1. A memory setting signal P-+, which will be described later, is input to the other input terminal.

The switch 124-+ is turned ON when the output of the AND circuit 125-1 is at the "H" level, and stores the measured value signal from the measuring instrument 60-1 in the calculation storage 113-+. One input terminal of the circuit 125-+ has
The mode switching signal Y-+ is input, and the memory setting signal P~1 is input to the other input terminal.

Therefore, when the mode switching signal Y-1 is at the L" level, the switch 115-1 is connected to the output side of the third subtracter 114-1, and the switch 125-1 is connected to the output side of the third subtracter 114-1, and the switch 122 is -t is turned on, and the second subtractor 11
2-1 output is stored in the calculation storage 113-t (zero tracking calculation mode).

Also, when the mode switching signal Y-t is at "H" level,
The switch 115-s is connected to the output side of the first subtracter 114-, and for each input of the memory setting signal P-1,
When the switch 124-1 is turned ON, the measured value signal from the measuring instrument 60-1 is stored (g difference measurement calculation mode).

Note that, as described later, when the mode switching signal Y-1 is "L"
At the level, the memory setting signal P-z is sent to the weighing hopper 57.
- Only when the weighed objects stored in storage compartment 58-1 and 59-1 are discharged at the same time or are not discharged for a specified period of time (including when the power is turned on).
Since the zero point correction value is set to H'' level, the zero point correction value is stored and set in the arithmetic storage device 113-1.

Furthermore, when the mode switching signal Y-1 is at the "H" level, the memory setting signal P-1 is output after the object to be weighed is discharged from the weighing hopper 57-1 (i.e., when the next object to be weighed is stored). immediately before), the calculation memory 113-
1, a measurement value signal from the scale 60-1 immediately before storing the object to be weighed is stored and set each time the object to be weighed is discharged.

Note that the other measured value calculation circuits 110-2 to 110-e are also configured and provided for each measuring instrument in exactly the same manner as described above.

The combination selection circuit 130, as shown in FIG.
Each weight storage device 1 of i-value computing circuits 110-t to 110-e
18-1 to 118-s and 119-t to 119-e, based on the weight values stored in 119-t to 119-e; The weight setting unit 130b stores the combination weight output of the combination calculation unit 130a and the set weight output of the weight setting unit 130b, determines the optimal combination, and outputs the combination selection signals S-1 to 5-to( The discriminator 130C outputs a "11" level pulse signal).

Note that this rough total total Q section 130a performs combined weighing based on the weight ffi value of the weight storage device whose combination permission signal from the discharge supply control circuits 150-r to 150-6, which will be described later, is at the "H" level. is being carried out.

Upon receiving the combination selection signal, the discharge supply control circuits 150-1 to 150-e select the respective storage chambers 58-1 to 58-8.
After opening a designated discharge gate among 59-1 to 59-8 and discharging the object to be weighed, close that discharge gate and open the discharge gate of the intermediate hopper to the weighing hopper that has already been discharged, and discharge the discharge stream. Drive the feeder corresponding to the intermediate hopper.

FIG. 5 is a block diagram showing the discharge supply control circuit 150-t, and FIG. 7 is a timing chart showing its operation.

Hereinafter, the configuration and operation example of the discharge supply control circuit 150-1 will be explained based on FIGS. 5 and 7.

In FIG. 5, the combination selection signals S-1 and S-2 from the combination selection circuit 130 are transmitted to the left and right storage chambers 58-1.59.
- discharge timer circuits TM1-1 and T corresponding to t.
(a), (b) input to M2-1.

The discharge timer circuits T M 1-t and T M 2-1 are composed of multivibrators, etc., and receive combination selection signals S, -
1. When the pulse signal S-2 is input to t, oFR (Fig. 7), a certain time T1 (i.e., the time required for the object to be weighed to be completely ejected from the storage chamber) from the rise of the respective pulse. ), the output of the discharge timer circuit TMI-z (C) is the discharge signal C-i.
The weight memory 11 of the weighed value calculation circuit 110-1
In addition to resetting the memory contents of 8-t, the storage chamber 58
-1 side discharge gate 61-1 is opened and closed.

Similarly, the output (d
) is the measured value +1 [circuit 1
At the same time, the storage contents of the weight storage device 119-t of 10-1 are reset, and the discharge gate 62-1 on the side of the storage chamber 59-1 is reset.
Open and close.

Output of discharge timer circuit TM1-1, TM2-t (C
) and (d) are input to the timing control circuit T M 3-1 via the OR circuit 174-1.175-t (C') and (d-).

The timing control circuit TM 3-1 is an OR circuit 174
When the output of -1.175-r falls (time t1 in FIG. 7), supply request signals (e) and (f) are sent to the intermediate timer circuit TM4-1, respectively.

The intermediate timer circuit TM4-1 receives the supply request signal (e)
, (f), a certain period of time T2 (
That is, the "H" level is output (9), (h) for the time required for the object to be weighed to be completely discharged from the intermediate hopper.

Moreover, the output of the intermediate timer circuit T M 4-1 is the discharge gate 55-! of the intermediate hopper 54-1 corresponding to the storage chamber 58-1, 59-1 of the weighing hopper 57-1! , 56-1, respectively.

However, as shown in FIG. 7, the supply request signal (e), (
f) is input at the same time, -sword (in this case,
The left side storage chamber 58-1) is prioritized and an "H" level signal is output (9), and the other side's output is output after a certain period of time T1 (Fig. 7 t).
3 o'clock), the level is set to "l-1" (h).

Further, the output of this intermediate timer circuit TM 4-1 is input to the feeder timer circuit TM 5-1.

The feeder timer circuit T M 5-1 operates for a certain period of time T3 from the fall of the input pulse (times t2 and t4 in FIG. 7) (i.e., the time required to feed approximately a predetermined amount of the wave-measured object to the intermediate hopper). The feeder 53-1 is driven by outputting the "i]" level signal. (i).

Also, the output (1, (h
) is also input to the timing control circuit TM 3-1, and the timing control circuit TM 3-t is constant from the rising edge of the outputs (9) and (h) of the intermediate timer circuit TM 4-t. After time T4 (i.e., the time from when the object to be weighed falls and is stored in the weighing hopper until the weight value signal becomes stable) (time t3, time ts in Figure 7), an instantaneous "H" level pulse signal is output. Do<j), (k).

This pulse is sent to the metric value processing circuit 110-1 as metric timing signals A-1 and B-t.

Further, from the timing control circuit TM3-s, a combination permission signal (at time t3 and time ts in FIG. 7) rising to "H" level is sent in synchronization with the measurement timing signals A-t and B-1. )), (m) are output, and this coarse combination permission signal (Jri, (m)) is sent to the combination selection circuit 130 (not shown).

Furthermore, the output (g) of the intermediate timer circuit T M 4-1,
(When h> falls (time t2, time t4 in FIG. 7), the supply request signals (e) and (f) are reset to 11179.
level, and the outputs of the OR circuits 174-t and 175-1 rise to the "H" level (t in FIG. 7).

time), combination permission signals ()), and (m) are reset.

In addition, in FIG. 5, a prohibition signal (n > is being sent.

Note that the other input terminals of the OR circuits 174-+, 175-+ on the output side of the discharge timer circuits TM1-+, 7M2-t are connected to an arithmetic control circuit 200-1, which will be described later.

The calculation control circuits 200-1 to 200-e send mode switching signals Y-t to Y to the measurement value calculation circuits 110-1 to 110-s.
-e and memory setting signal P-t-P-o, the measurement value calculation circuits 110-1 to 110-
At the same time as changing the operation mode of e (i.e., zero tracking operation mode or deviation measurement operation mode), each measuring instrument 60-1 to 60-6 is stored in operation memory 113-1 to 113-a.
The O-affi zero point correction value or the weighing value signal immediately before storing the object to be weighed is stored and set at any time.

The arithmetic control circuit 200-+ is configured as shown in FIG. 6, for example.

In the figure, 210-+ is the calculation memory 113-1 of the measured value calculation circuit 110-+ when the device power supply is ONL.
The zero point correction value is initially set in the weighing hopper 57-.
This is a first zero tracking requesting unit that resets a zero point correction value (zero tracking) every time a predetermined time elapses without supplying or discharging an object to be measured.

The first zero tracking request unit 210-+ includes an oscillator 211-1 that outputs a pulse of a predetermined period, and an oscillator 211-
+ pulses are counted, and when the counting result reaches a predetermined number, that is, when a predetermined time (for example, 6 minutes) has elapsed, the signal becomes "H".
A counter 212-+ that outputs a pulse of a certain level, a power supply timer TM7-1 that outputs a pulse of a predetermined width when the device power is turned on, an output of the counter 212-1, and a power supply tie 7.
An OR circuit 213-1 which takes a logical sum with the output of 7M7-1, and a ya logical sum of -1, B-+ and the output of the counter 212- to the metering timing signal from the discharge supply control circuit 150-+, The output of the counter 212-1
It consists of an OR circuit 214-+ that resets the .

220-+ is the measuring instrument 6 from the previous zero tracking.
0-1 When the ambient temperature deviation exceeds a predetermined value, a predetermined time has elapsed, or the object to be weighed has been discharged from this weighing hopper 57-1 more than a predetermined number of times, a new zero point correction value is reset. This is the second zero-tracking requesting unit.

In the second zero tracking request unit 220-1, 22
1-+ is a temperature sensor that detects the ambient temperature of the measuring instrument 6o-1, and 222-+ is a subtraction that subtracts the stored value stored in the temperature storage device 223-+ from the temperature value from the temperature sensor 221-t. It is a vessel.

The temperature storage device 223-+ stores the temperature value input from the temperature sensor 221-+ via the switch 224-+.

225-+ is a predetermined reference temperature value (for example, 0°5°C
) is stored in the reference temperature value from the temperature setter 226-+ and the output of the subtracter 222-1, and the subtracter 222-
This comparator outputs an "H" level signal when the + output is greater than or equal to the reference temperature value, and outputs an "L" level signal when it is smaller than the reference temperature value.

TM8-1 outputs the “L” level for a predetermined period of time (for example, 6 minutes) after the pulse signal is input, and then outputs the “H” level.
This is a zero set timer that outputs a level signal. When the next pulse signal is input during the timer operation, this zero set timer T M 8-t outputs a " This is a retrigger type timer that outputs an H'' level signal.

Further, 227-t is a discharge counter that counts the discharge signals C-1 and D-+ from the discharge supply control circuit 150-+ input via the OR circuit 228-+ and outputs the counted value. It is.

229-+ compares the count value from the discharge counter 227-+ with the reference count value from the count setter 230-+, in which a predetermined reference count value (for example, 10 times) is set in advance, and calculates the count value from the discharge counter 227-+. This is a comparator which outputs an "H" level signal when the count value of -+ is greater than or equal to the reference number of times, and an "L" level signal when it is smaller than the reference number of times.

The "H" level output of both the comparators 225-+ and 229-t is output to the zero-set timer T via the OR circuit 231-+.
MS-1 and the switch 224-+
is turned on to reset the discharge counter 227-+.

Further, the outputs of both comparators 225-1, 229-1 and zero-set timer TMS-1 are passed through an OR circuit 232-t to a delay type flip-flop FF7- whose D input is fixed at H'' level. 1, and its output Q is input to one input terminal of an AND circuit 233-1 and an OR circuit 234-1.

The output of an AND circuit 235-+, which receives the combination selection signal from the combination selection circuit 130, is connected to the other input terminal of the AND circuit 233-+.
33-+ output is input to one input terminal of OR circuit 236-1.237-+.

Further, the other input terminal of the OR circuit 234-+ receives a mode switching signal Y from the calculation mode switching switch 250-1.
-+ is input.

The other input terminal of the OR circuit 236-+ is an AND circuit 238 which inputs the combination selection signal @S-1 corresponding to the left storage chamber 58-1 from the combination selection circuit 130 and the mode switching signal @Y-1. -+ output is connected, OR circuit 23
The output of an AND circuit 239-+, which inputs the combination selection signal S-2 corresponding to the right storage chamber 59-1 and the mode switching signal Y-t, is connected to the other input terminal of 7-1.

The outputs of the OR circuits 236-* and 237-+ are based on the time constant T1 of the discharge timer circuits TM1-+ and TM2-+, and the weighing value signal becomes stable after the object to be weighed is discharged from the weighing hopper 57-1. Approximately the total time (T1+T
supply delay timer TM9-+ with time constant T6 of
They are respectively input to TM10-+. This output is
OR circuit 1 of discharge supply control device W1150-+, respectively
A memory setting timer TM11 is connected to one input terminal of 74-+ and 175-t, and outputs an "H level pulse" with a very small pulse width from the falling edge of the input pulse.
-1, is input to TM12-r.

The output of this memory setting timer TM 111-11T 12-t is input to the OR circuit 242-1.

The output of the A circuit 213-t of the first zero tracking request section 210-1 is also input to the OR circuit 242-1, and the output of the OR circuit 242-1 is the memory setting signal P-+
The signal is output to the measured value calculation circuit 110-t, and is also input as a reset signal to the reset terminal of the flip 70 tube FF7-t and the OR circuit 231-z via the OR circuit 243-1.

The OR circuit 242-s also includes an AND circuit 241-1.
The output of is input.

This AND circuit 241-r includes an AND circuit 235-1
AND circuit 2 with output and mode switching signal Y-1 as input
Flip-flop FF which rises by the output of 40-1
8-1 output Q and a narrow "H" level pulse of a simultaneous discharge timer TM13-1 activated by the fall of -1 to the metering timing signal.

The mode switching signal yt is input to the other input terminal of the OR circuit 243-t.

In addition, when the calculation mode changeover switch 250-tortoise is turned OFF, it outputs a signal of "H" level, and when it is turned ON, it outputs a signal of "L" level.
"Outputs a level signal.

Therefore, when the device power is turned on while the Pf4n mode changeover switch 250-t is closed, the power supply timer TM7-h of the first zero tracking requesting section 210-+
The memory setting signal P-+ is sent to the measured value arithmetic circuit 110-z.
and the performance memory 113-t is initialized for zero tracking performance storage 113-t.

In addition, if the temperature difference, elapsed time, or number of discharges from the initial setting exceeds the reference value (0.5℃, 6 minutes, 10 times, respectively), the output of flip-flop FF7-1 will go to "H" level. Therefore, only when the two combination selection signals S-1 and S-2 are input simultaneously, the supply delay timers TM9-+ and TM
IO-t operates simultaneously, and after this operation, the memory setting signal P-
1 is output.

This arithmetic control circuit 200-+ also receives a memory setting signal P.
-+ is output, the stored value of one temperature memory 223-+ is updated, and the discharge counter 227-+ is reset.

Furthermore, if the object to be weighed is not discharged from the weighing hopper 57-1 for a predetermined period (6 minutes), the first zero tracking requesting section 210-1 sends the memory setting signal P-1 to the weighing [[ circuit 110-t. It will be output.

Further, when the power is turned on with the calculation mode changeover switch 250-1 open, the mode changeover signal Y-1 at the "11" level and the memory setting signal pt are changed to the weighing value Pf4\f.
It is output to the i circuit 110-t, and the calculation storage 113-1 is initialized for the WI difference measurement calculation mode. After this initial setting, when the combination selection signals S-1 and S-2 are input, the supply delay timer (at least one of TM9-1 and TMlo-1) corresponding to the input combination selection signal is activated. do. After this operation, the memory setting signal P-1
is output to the measured value calculation circuit 110-t, and measurement in the deviation measurement calculation mode is started.

Note that if the combination selection signals are simultaneously input in this deviation measurement calculation mode, the supply delay timers TM9-1 and TMIO
After the memory setting signal pt is output once after the operation of -1, the memory setting signal P-1 is output again at the falling edge of the metering timing signal A-1 from the discharge supply control circuit 150-*. Become.

Note that this combination weighing device has the above-mentioned weighing value calculation circuit 1.
10-1, a discharge supply control circuit 150-t, and an arithmetic control circuit 200-+ are configured such that eight sets are provided in exactly the same manner for each of the measuring instruments 60-1 to 60-8.

Operation of the above embodiment> (Figs. 7 to 9) Next, the operation of the above embodiment will be explained based on the time charts of Figs. 7 to 9.

In advance, each storage chamber 58-1 to 58- of all intermediate hoppers 54-1 to 54-B and weighing hoppers 57-1 to 57-8 is
8.59-1 to 59-8 accommodate the objects to be weighed, and the weight storage units 118-s to 118-e, 119-t to 119- of the weighed value calculation circuits 110-1 to 110-e. It is assumed that each weight value is stored in 8.

Further, the calculation mode changeover switches 250-1 to 250-e of the WA calculation sub-control circuits 200+ to 200-e are set to the ON (closed) state.

(Initial setting of zero point correction value) First, when the device power is turned on, the arithmetic control circuit 200-
+~200-e power supply timer TM7-t~TM7-
8 is activated, the first zero tracking requesting section 210-1
Since the memory setting signals P-+ to P-e from ~210-e are input to the measured value calculation circuits 110-+ to 110-e,
The calculation storage units 113-1 to 113-e include a measuring device 60-
From the weighing value signals from 1 to 60-8, the weight memory 118
-1 to 118-e and 119-+ to 119-s after subtracting the added weights (beating zero point correction value) are initially set.

On the other hand, each weight memory value of the weighing value calculation circuits 110-1 to 110-e is stored in the combination calculation section 130 of the combination selection circuit 130.
sent to a.

(Combination Selection Operation) The combination calculation unit 130a calculates combination weights for all different combinations based on the weight values of the storage chambers whose combination permission signal is at the "H" level. Discrimination unit 13
At 0C, the optimal combination weight is determined that is close to or equal to the set weight set in the weight setting section 130b, and as a result,
A combination selection signal corresponding to each of the selected storage chambers is sent to the discharge and supply control circuits 150-z to 150-e.

Here, for example, the storage chamber 58-1 of the weighing hopper 57-1
．． It was housed in 59-1. When objects to be weighed (with respective weight memory values as WLQ and WRo) are selected for combination selection at the same time, both discharge timer circuits TM1-1 are activated at to as shown in the time chart of FIG. , T M 2
-1, the combination selection signals S-t and S-2 are respectively inputted (FIGS. 7(a) and (b)).

(Discharge supply operation) When the combination selection signal is input, the re-discharge timer circuit TM
I-1 and TM2-t both operate, and FIG. 7(C),
As shown in (d), the output is t.

11 hours since ``)]'' level has been reached. This output is sent out as discharge signals C-1, D-t.

As a result, the re-discharge gate 61 of the weighing hopper 57-1
-1.62-1 opens for T1 time, storage room 58-! , 59
The objects to be weighed stored in -1 are discharged to the collection chute 63 along with the objects to be weighed discharged from other weighing hoppers.
It is stored in the timing hopper 26 via the hopper 26, and is discharged to the packaging machine 65 at a predetermined timing.

At this time, both weight storage devices 1 of the weight value calculation circuit 110-1
18-r and 119-t are reset.

When time Tr has elapsed since time t, the timing subcircuit T
Supply request signals (e) and (f) are both input from M3-1 to intermediate timer circuit TM4-1.

(Measuring operation in the left storage chamber) As a result, the intermediate timer circuit TM4-1 outputs (C-) and (d') of the OR circuit 174-1.175-t.
In order to output the "T1" level for 12 hours from time t1 when
is opened, and the object to be weighed is placed in the left storage chamber 5 of the weighing hopper 57-1.
It is stored in 8-1.

Then, 12 hours later at t2, the intermediate timer circuit T M
When the output of 4- changes to the "off" level, the feeder timer circuit T M 5-1 operates i), and the feeder 53-
1 is driven, a new object to be weighed is supplied from the feeder 53-1 to the intermediate hopper 54-1, and the supply request signal @(e) is reset.

At time t3, which is 14 hours after time t1, a combination permission signal ()) is sent to the combination selection circuit 130, and the measurement timing @A-1 is set to the measurement value calculation circuit 110-.
1, and switch 116-1 is turned on.

As a result, the sufficiently stable weighing value signal WTI from the measuring instrument 60-r is input to the first voltage reducing device 111-t of the weighing value calculation circuit 110-r, and the initially set zero point correction value WHo is Then, in the third weight reduction device 114-1, the added value (in this case, "0") of the stored values of the weight storage units 118-t and 119-1 is subtracted, and this weight reduction result (W 1-WHO = %1) is the weight memory 118
-1 is stored.

With the above steps, the weighing of the objects to be weighed supplied to the left storage chamber 58-1 is completed, and this weight value WL1 is sent to the combination selection circuit 130.

(Weighing operation in the right storage chamber) At time t3 when the measurement in the left storage chamber 58-1 is completed, the output (h) of the intermediate timer circuit TM4-1 changes from time t3 to 12
The time reaches the "g" level, and this output opens the right m# output gate 56-1 of the intermediate hopper 54-1, and the object to be weighed is stored in the right storage chamber 59-1 of the weighing hopper 57-1. .

Then, the intermediate timer circuit T M 4-t changes from time t3 to T
When the level returns to "L" after two hours, the feeder timer circuit T M 5-1 is activated and the object to be weighed is supplied from the feeder 53-1 to the intermediate hopper 54-1 (i).

Also, at t3, the intermediate timer circuit TM4-1 is “H”
At time tS, when TirR has elapsed since the level is reached, the combination permission signal <m) is sent to the combination selection circuit 130, and the measurement timing signal @B-1 turns on the switch 117-t of the measurement value calculation circuit 130-r. let

As a result, the sufficiently stable measured value signal W from the measuring instrument 60-1 and the zero point correction value W1. io is subtracted, and then the total value (in this case "WL1") of the stored values of both types of all storage devices 118-1 and 119-t is subtracted, and this subtraction result is added to the storage space in the right storage chamber 59-1. Weight of the object to be measured 11 if
f Wgl (=WT2-Wrio-WLt)
is stored in the lff1 storage unit 119-1.

Similarly, the zero point correction value WH is calculated from the weighing value signal W7-.
The weight values of the objects to be weighed are sequentially calculated based on the values obtained by subtracting o, and combinations are selected and discharged.

Note that similar weighing operations are performed for the other weighing hoppers 57-2 to 57-8.

(Zero tracking calculation mode) When such a weighing operation continues, for example, F
The second zero tracking requesting unit 220-1 of the f4 bright 1111J control circuit 200-1 determines whether the temperature deviation, elapsed time, or number of discharges from the initial setting of the zero point correction value is the standard value (0.5°C, 6 minutes). , 10 times), the output Q of flip-flop FF7-1 becomes "H" level.

At this time, when the combination selection signals (a) and (b) are both input as shown in the time chart of FIG. 8 (time t6 in FIG. 8), the object to be weighed in the storage chamber 58-1. are discharged at the same time, and the supply delay timers TM9-1 and TMlo-1 both operate for T6 hours (C'). Delayed (e).

After the timer operation ends (at time t7 in Figure 8), the memory setting signal P is
-z is sent to the weighing value calculation circuit 110-t, and the stable weighing value signal of the empty weighing hopper 57-1 is stored as a new zero point correction value Ws1 in the calculation storage 113-1 via the switch 122-t. is set (at this time, the weight memory 11
The stored values of 8-z and 119-t are both “0”)
.

Further, at time t8, 14 hours after the output (9) of the intermediate timer circuit TM 4-1 rises, the timing control circuit TM 3-1 outputs the metering timing signal A-1 (j), Switch 116-1 of resistance ffi value calculation circuit 110-t is turned on.

Therefore, from the stable weight value signal wT3 of the object to be weighed stored in the left storage chamber 58-1, the zero point correction and correction ttiWH1 newly stored and set at time t7 are reduced, and the adder 120-1 outputs the value. (in this case “0”) is subtracted,
This reduced sieving Song (i.e. WT3-W+-11=WL2)
is stored in the weight memory 118-1 as the weight value of the object to be weighed stored in the left storage chamber.

Also, at time t8, the output (h) on the other side of the intermediate timer circuit M4-1 rises to the "1" level, so a new object to be weighed is transferred from the intermediate hopper 54-1 to the left storage chamber 59-1. is stored.

At time t3, when 14 hours have passed since time js, the measurement timing signal B-1 from the timing control circuit T M 4-1 turns on the switch 117-1 of the measurement value calculation circuit 110-1, as described above. Weight storage device 119
−1, zero point correction in W is performed from this weighing value signal WTr.
, 11 and the adder 120- by subtracting the output wL2 (ie, W71 wrn wLl = WR2) is stored as the weight value of the object to be weighed stored in the right storage chamber 59-1.

In the same way, if the temperature difference, elapsed time, or number of discharges exceeds the reference value since the previous zero point correction value setting, the objects to be weighed in the defined storage chamber 58-1.59-1 are weighed at the same time. Each time it is discharged, a zero tracking operation is performed and a weighing calculation is performed.

Note that such zero tracking operation is performed by other measuring instruments 6.
The same process is performed for 0-2 to 60-8.

During such a weighing operation, if a predetermined time (6 minutes) elapses without a combination of objects to be weighed in the weighing instruments stored in the weighing hopper 57-1 being selected, the first zero tracking requesting section 210 -1 counter 212-1 output becomes "H" level, and the storage setting signal P-s is sent to the measured value calculation circuit ITO-t.

Therefore, the crystal 1 suspension stop circuit 110-t outputs the adder 120- (WL
-, + W2z) is subtracted, this result (WT da-w
L2-WP! 2> is stored in the calculation storage 113-1 as a new zero point correction value Wti2, and the zero tracking operation with the object to be weighed is carried out for a predetermined time <
every 6 minutes).

In addition, at the beginning of the weighing operation where the temperature drift of the weighing instruments 60-1 to 60-8 is severe, each of the reference values (0.5°C, 6 minutes,
10 times) may be changed to perform the zero tracking operation more frequently.

<1iii difference measurement calculation mode) If the object to be weighed has residual properties such as pickles, turn off the calculation mode selector switches 250-1 to 250-e in advance.
When the power is turned on in the F (open) state, mode switching signals Y-1 to Y are sent to the weighing value calculation circuits 110-1 to 110-e.
-a and memory setting signals Pt to pa are input.

Therefore, the measured value signals from each of the measuring devices 60-1 to 60-8 are stored in the calculation storage devices 113-1 to 113-a via the switches 124-1 to 124-e.

In this state, as shown in FIG. 9, for example, the weighing hopper 57
-1 combination selection signal corresponding to left storage chamber 58-1 (
When a) is input to the arithmetic control circuit 200-1, the discharge timer circuit TMI-r and the supply delay timer TMI-t of the discharge supply control circuit 150-1 operate ( C), (C-) After the object to be weighed is discharged from the left storage chamber 58-1 and 16 hours have elapsed since 1:00 (t1:00 in FIG. 9), the intermediate hopper 54-1 is opened for 12 hours ( q).

At this time (at time t1 in FIG. 9), the measured value calculation circuit 110-
Since the switch 124-t of No. 1 is turned on by the memory setting signal P-1, a stable weighing value signal W1 of the weighing hopper 57-1 from which the object to be weighed is discharged is generated by the combination selection signal.
is stored in the arithmetic storage unit 113-1.

Next, at t2 o'clock, 14 hours after tl o'clock when a new object to be weighed is stored in the left storage chamber 58-1 from the intermediate hopper 54-1, the weighing timing signal A-1 is
is input to the weighing value calculation circuit 110-t, so from the weighing value signal W2 at this time (temporary t2), the calculation memory 113-
The result of subtracting the weighing value W1 stored in 1 is the left storage chamber 5.
m it ffi Th (7) accommodated in 8-1
I (iii (W2-Wl = WLi, -)) is stored in the small storage device 118-s via the switch 116-t.

In addition, if the wave meter ffl objects in both storage chambers 58-1 and 59-1 are discharged at the same time, the weighing of the object newly stored in the left storage chamber 58-1 is completed (i.e., At the falling edge of the weighing timing signal A-1 in FIG.
1 and the simultaneous discharge timer TM13-t), the measured value signal at this time is stored in the arithmetic storage unit 113-1, and the same weighing measurement as described above is performed (not shown).

Similarly, the stored weight value immediately before the weighted object is stored in the weighing hopper 57-1 and the defield result of the weighted value signal after storage are the critical disease value of the stored weighted weighted object. are sequentially stored in each small storage device 118-z, 119-1 as
Similarly to the above, the signals are sent to the combination selection circuit 130.

For example, if a part of the object to be weighed remains in the left storage chamber 58-1 of the weighing hopper 57-1 during weighing in this deviation measurement calculation mode, the object to be weighed newly stored in the left storage chamber 58-1 Although the measurement value signal of the object temporarily includes an error, the measurement value signal of the object newly stored in the right storage chamber 59-1 does not include the error due to this residual amount.
Furthermore, after this residual amount is discharged together with other objects to be weighed, no measurement error will occur due to this residual amount.

Note that during this B difference measurement mode, the arithmetic control circuit 200-
1~200-e flip-flop F F 7-t~F
The F7-e is put into a reset state and the zero tracking calculation mode is prohibited.

Other Embodiments of the Present Invention In the above embodiments, the storage means for storing the zero point correction value and the storage means for storing the weighing value signal immediately before storage of the object to be weighed are provided in the arithmetic storage unit 113-1. Although it is shared by 113-e, it may be provided separately.

In addition, in the above embodiment, the combinations of the objects to be measured by waves are selected based on their weight values, but the combinations are selected based not only on the weight values but also on the number of pieces highlighted based on the weight values. You can.

In this case, this can be easily realized by providing means for converting the serious disease value into a number of pieces and a number setting section for storing and setting the set number of pieces instead of the weight setting section 130b of the combination selection circuit 130.

Further, it goes without saying that the control device 100 of the above embodiment is not limited to the circuit configuration of the above embodiment,
It does not deviate from the gist of the present invention to configure it with a microcomputer having an equivalent operating program.

Effects of the present invention> Since the combination weighing device of the present invention is configured as described above, it can cope with drift of the weighing instrument, stationary debris of the object to be weighed, etc., without stopping the operation of the device. This has the advantage that the zero point correction value can be reset easily and frequently, there is little measurement error, and the operating rate of the device does not decrease.

Further, even when weighing objects that have residual properties, highly accurate weighing can be performed by switching the calculation mode, so a wide range of weighing is possible without being limited to the types of objects to be weighed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the present invention, FIG. 2 is a schematic diagram of the mechanism of the present invention, FIG. 3 is a block diagram showing a control device, and FIGS. 4, 5, and 6 are , a block diagram showing the main parts of FIG. 3, and FIG. 7 a timing chart showing an example of the operation of FIG. 8 is a diagram showing a part of the timing chart of the zero tracking calculation mode of FIG. 6, and FIG. 9 is a diagram showing a part of the timing chart of the deviation measurement P7A calculation mode of FIG. 6. FIG. 10 is a schematic configuration diagram showing a conventional combination weighing device, and FIG. 11 is a block diagram showing the main parts of FIG. 10. 53-1 to 53-8... Feeder, 54-1 to
54-8...Intermediate hopper, 57-1 to 57-8
...Weighing hopper, 58-1 to 58-8.59-
1~59-8...Storage room, 60-1~60-8
...Measuring instrument, 110-s to 110-e...
...Measurement value calculation circuit, 113-z to 113-a...
... Stop memory device, 118-1 to 118-e, 119-t
~119-8... Weight memory device, 130...
...Combination selection circuit, 150-1 to 150-e...
...Discharge supply control circuit, 200-1 to 200-e...
...Arithmetic control circuit, 210-t to 210-8...
...First zero tracking request unit, 220-1 to 220
-e...Second zero tracking request section, 250
......Calculation mode selector switch, TMI-s~T
M1-a... Ejection timer circuit, T M2-t
~TM2-8...Ejection timer circuit, TM3
-1 to TM3-o...timing control circuit, TM4-1 to TM4-a...intermediate timer circuit, TM5-1 to TM5-a・・・・・・
・Feeder timer circuit, TM9-1 to TM9-
e, TMlo-1 to TM10-a... Supply delay timer. Patent Applicant Anritsu Corporation Agent Patent Attorney Makoto Hayakawa Figure 7 Figure 8

Claims (1)

[Scope of Claims] A plurality of supply means for supplying objects to be weighed, and a plurality of integrally connected storage chambers that sequentially store the objects to be weighed from the plurality of supply means, each having an independent ejection means. a plurality of weighing hoppers having a plurality of weighing hoppers; a plurality of weighing means provided for each of the plurality of weighing hoppers for measuring the weight of objects to be weighed stored in the weighing hoppers; and weighing from the plurality of weighing means. At least one of the weight value and piece count of the objects to be weighed stored in each storage chamber owned by the plurality of weighing hoppers calculated based on the value signal is combined to be close to or equal to the set weight or set number of pieces. and a control device for selecting a combination and discharging objects to be weighed in the selected combination from the storage chamber, wherein the control device stores zero point correction values for each of the plurality of weighing means. a plurality of measurement value storage means for storing measurement value signals from the plurality of weighing means immediately before the objects to be weighed are supplied to the plurality of weighing hoppers from the plurality of supply means; Based on the value obtained by subtracting the zero point correction value stored in advance in the correction value storage means from the measured value signals from the plurality of measurement means, the weight stored in any of the plurality of storage chambers is determined. a first calculation mode for calculating at least one of a weight value or a piece value of the object to be weighed; and a plurality of weighing operations after the object to be weighed is stored in one of the plurality of storage chambers owned by the plurality of weighing hoppers. The measured value stored in one of the plurality of storage chambers is based on the value obtained by subtracting the measured value immediately before storage of the object to be weighed, which is stored in advance in the measured value storage means, from the measured value signal from the measured value storage means. a plurality of weight value calculation means having a second calculation mode for calculating at least one of the weight value or piece value of the object to be weighed; and a plurality of weight value or piece value calculated by the plurality of weight value calculation means. combination selection means for selecting a combination that is close to or equal to at least one of a set weight or a set number of pieces based on at least one of the numerical values; and a combination selected by the combination selection means by controlling the plurality of discharge means. a plurality of discharge control means for discharging objects to be weighed from all storage chambers included in the storage chamber; and a plurality of discharge control means for controlling the plurality of supply means to discharge new objects to the storage chambers from which objects to be weighed have been discharged by the plurality of discharge control means. a plurality of supply control means for supplying objects to be weighed; a plurality of calculation mode switching means for switching between the first calculation mode and the second calculation mode of the plurality of measurement value calculation means; a plurality of zero tracking control means for storing and setting a new zero point correction value in the plurality of correction value storage means when the calculation means is performing a measurement calculation in the first calculation mode; and a plurality of said measurement value calculation means. is performing weighing calculations in the second calculation mode, each time an object to be weighed is stored in the plurality of weighing hoppers, the weighing value signals from the plurality of weighing means immediately before the storage are sent to the plurality of weighing means. A combination weighing device comprising a plurality of deviation measurement control means for storing and setting the weight value in the weight value storage means.