JPH01118725A - Combinational weighing device - Google Patents

Abstract

PURPOSE:To perform high-efficiency, high-accuracy weighing by using a small number of weighers by providing one weigher to weighing hoppers and performing the weighting operation by the weighing hoppers. CONSTITUTION:Lump bodies are put in intermediate hoppers 141-14n from a supplier 11, discharge gates 151, 153... are opened to fall the stored bodies in the weighing hoppers 161, 163..., and they are weighed. The lump bodies are put in the hoppers 141, 143... again, fallen in weighing hoppers 161, 163... similarly, and weighed. Then the weight values of the respective hoppers 161, 163... are stored 24 with weight signals from the weighers 171, 173.... A combination calculation part 25a calculates the weight values of all different combinations of a specific number of weighing hoppers 16. A discrimination part 25c discriminate the combination which provides the least difference from a set weight value and sends a combination select signal to a discharge limiting device 23. Consequently, the discharge gate 18 of the specified hopper 16 is opened. When the hopper 16 is emptied, the body stored in the intermediate hopper 14 is discharged to the hopper 16, but a combination of remaining hoppers 16 is selected during this period and discharging 18 is performed.

Description

[Detailed Description of the Invention] This invention is a method of grouping multiple items such as confectionery, fruits, vegetables, etc. whose individual weights vary (hereinafter referred to as lumps) so that the weight is approximately constant. This is related to the combination ff1H position used when carrying out bagging and the like.

Even if an attempt is made to combine a plurality of lumps whose individual weights vary by the set amount into a mold, an error will occur between the set weight and the set weight. This error becomes more significant as the average weight of one lump increases.

To solve this problem, a combination weighing device as shown in FIG. 1 has conventionally been used.

That is, in this combination meter ffi device, a plurality of lumps corresponding to approximately a fraction of the set weight are sequentially supplied to the plurality of weighing hoppers 11 to 1n, and each of the weighing hoppers 11 to 1n
The plurality of contained lumps are each weighed by measuring devices 21 to 2n provided in each case. And this measuring instrument 2
Based on the output of 1 to 2n, all different combinations of lumps are determined by the combination of a predetermined number of weighing hoppers. Among these combinations, the combination with the smallest difference from the set weight is determined, and the lumps in the weighing hopper of this combination are discharged and collected in the collection chute 3 or the like.

However, the conventional combination meter ffi with such a configuration
The device had the following drawbacks:

For example, 1011 measuring hoppers and measuring instruments are installed, and 4g
It is assumed that they are combined in a weighing hopper.

As shown in FIG. 2(a), first, a plurality of lumps are placed in each of the weighing hoppers of phases ① to [phase] and weighed.

Next, a combination of 4 g weighing hoppers is selected from among the 10 combinations (mc+=210), and one combination is performed, and the combination closest to the set weight is determined. As a result,
For example, when ■, ■, ■, ■ are selected, the contents of these weighing hoppers are discharged and collected as shown in FIG. 2(b).

However, it takes a considerable amount of time to refill the weighing hopper with the lumps after discharging and weighing them, due to feeding and stabilization of the weighing hopper. Therefore, it would be extremely inefficient to wait for the weighing hopper to be refilled and weighed after discharging before carrying out the next combined discharge. Therefore, Fig. 2 (C
As shown in ＞, during refilling of ■, ■, ■, [phase], the remaining six weighing hoppers determine the combination. For example ■
, ■, ■, ■ are selected, the contents of these weighing hoppers are discharged and collected as shown in FIG. 2(d).

During this time, ■, ■, ■, and [phase] are filled, so next, as shown in Figure 2 (e), six weighing hoppers excluding ■, ■, ■, and ■ are used to determine the combination. Then, as shown in FIG. 2(f), the contents are discharged and collected from the four selected weighing hoppers. Thereafter, the same operation is repeated.

However, since there are only 1Ic4=15 combinations in which four of the six weights are selected, it is difficult to obtain a combination with a small difference from the set weight, resulting in a significant decrease in accuracy.

Therefore, the conventional rough totalizer ffi device has high efficiency,
In order to obtain high accuracy, it was necessary to increase the number of scales, feeders, etc. (generally at least 15 sets or more in the past).

However, since measuring instruments and the like are expensive, if the number of measuring instruments is increased, the entire device becomes extremely expensive. In addition, since the measuring instruments always require adjustment, as the number of measuring instruments increases, maintenance becomes complicated and the reliability of measurement deteriorates.

The object of the present invention is to correct the above-mentioned drawbacks and provide a combination weighing device that can perform combination weighing with high efficiency and high accuracy without increasing the number of weighing instruments.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 3 is a schematic diagram of an embodiment of the present invention.

In the figure, reference numeral 11 is a feeder that sequentially supplies lumps to a circular feeder 12. Below the periphery of the circular feeder 12, intermediate hoppers 141 to 14n of N tin are arranged in a circular manner, and a plurality of lumps are sequentially supplied through the respective feeders 131 to 13n.

Below the intermediate hoppers 141-14n, there are two weighing hoppers 161, 162-16 buttons-1, 16, respectively.
A plaque has been set up. The lumps stored in the intermediate hoppers 141 to 14n are discharged through the discharge gates 151.152 to 15z.
When listening to odes n-+ and 15, each weighing hopper 161
．． 162-162n-+, 16-capacity.

Two weighing hoppers 161.162 to 1620-1
．． One measuring device 171 to 17n is installed in each of the 16 weighing hoppers, and one weighing device detects one load of the contents in any one of the two weighing hoppers.

Figure 4 shows one of the contents for both of the pair of weighing hoppers.
An example of a configuration for detecting suspension is shown. That is, the pair of weighing hoppers 16a, 16a, 1 are integrally 411
A load is applied to the measuring instrument 17a.

Therefore, a lump is stored in only one of the pair of weighing hoppers 16a, 16a◆1 and weighed to detect the weight, and then the lump is stored in the other weighing hopper and weighed in both weighing hoppers. A total of 8 items in the hopper! By detecting the volume and subtracting the pebbles from one weighing hopper, the volume of the contents of the other weighing hopper is also detected.

In FIG. 4, 18a and 18a 1 are the discharge gates of the weighing hoppers 16a and 116a++, respectively.

In addition to the configuration shown in FIG. 4, various types of weighing of the contents of a plurality of weighing hoppers are possible using one weighing device.

For example, as shown in FIG.
0a◆1 is attached to the pillars 31a, 31a+t via the bins 32a, 3
It is rotatably mounted at 2m+1.

Rollers 33a and 33a+1 are attached to the tips of the operating rods 30a and 30a+t, respectively. Operating rod 30
a s 30 a order 1 is a cam mechanism 34a, 34al
Depending on l, if one of them rises, the other will fall. Independent 211! l weighing hopper 16a116a+
1 is attached to the weighing table 35, respectively, with wing pieces 34a134a+
The operating rods 30a, 30a+ are mounted by +.
When the weight 1 rises, it comes into contact with the roller 33a133a++ and is lifted up, leaving the weighing platform 35. Therefore, one of the operating rods 30a and 30a+t rises,
Since the other one descends, the weighing hoppers 16a, 16a+t
One of them leaves the weighing platform 35, and the other moves away from the weighing platform 35.
will be placed on.

The weight applied to the weighing platform 35 is measured by the weighing device 17a. The cam mechanisms 34a, 34a++ are driven by a signal from the discharge cylinder v123 of the control table M22, and one of the weighing hoppers to be weighed next is lowered to detect the weight of the stored material.

Below the weighing hoppers 161 to 16211, there are collection screens:
Li-19 is installed. Each weighing hopper 16+
The lumps stored in ~162n are discharged through the discharge gate 1
” If you open buttons 181-18, you will fall into gathering chute 19.

Below the collection chute 19, a packaging device 21 is installed.
! has been done. At the bottom of the collecting chute 19, a timing hopper 20 is provided which opens at regular intervals.

The discharge gates 151 to 15 and 181 to 18zn are
Opening/closing is controlled by the emission control IT device 23 of fiJ@W122.

The weight signals from the weighing units B171 to 17n are sent to the control unit 2.
It is sent to the measured value storage circuit 24 of No. 2. Also, emission control t11
The device e123 sends to the measured value storage circuit 24 a signal indicating which of the two discharge gates 15 provided for each intermediate hopper 14 has been opened. Therefore, the weighing value storage circuit 24 stores the weights of the lumps accommodated in the weighing hoppers 161 to 162n, respectively.

A combination calculating unit 25a that calculates the combined weight of a lump based on a predetermined number of weighing hoppers for all different combinations based on a weight signal of the object; a weight ffi setting unit 25b that stores a set weight; A determination unit that compares the combined weight output of the weighing unit 25a and the set weight output of the weight ffi setting unit 25b, determines the combination of weighing hoppers that has the smallest difference from the set weight, and outputs a combination selection signal. 2
5c.

When the emission control device 23 receives the combination selection signal,
Discharge gates 181-1 of weighing hoppers 161-162n
After listening to the designated gate of 8211 and discharging the lumps, close that gate and open the discharge gate of the intermediate hopper to the weighing hopper that has already been discharged.

When the supply m@et 26 receives the @ sign indicating whether the discharge gates of the intermediate hoppers 141 to 14n are opened from the discharge 1-control device 23, it drives the feeder 11, the circular feeder 12, and the feeders 131 to 13n to discharge it. The lumps are supplied to any of the intermediate hoppers 141 to 14n.゛Next, the operation of the combinational ffi device according to the above embodiment will be explained.

A plurality of lumps are passed through the feeder 11, the circular feeder 12, and the feeders 131 to 13n, and then to the intermediate hoppers 141 to 14.
n, and first one discharge gate 151.153
,..., 15211-1, and transfer the contents to one weighing hopper 161.163,...16z
It is dropped into n-1 and weighed. Intermediate hopper 141
~14n are again filled with lumps, and then the other discharge gates 152, 154, . ...
..., to be dropped into 16zn and hung.

In this way, a plurality of lumps are accommodated in all the weighing hoppers 161 to 16, respectively.
~17n, each 4-hanging hopper 16
The measured value storage circuit 24 stores the Φ values of the contained objects for 1 to 162 rl.

Union t! The rough adjustment meter cylindrical section 25a of the selection circuit 25 outputs "combined weights p" for all different combinations of rough combinations of a predetermined number of weighing hoppers based on the stored vehicle quantity signal. The determination unit 25C determines the combination of weighing hoppers that has the smallest difference from the set weight set in the weight ffi setting unit 25b, and sends a combination selection signal to the discharge control device rf123. The discharge control device 23 listens to the discharge gate of the weighing hopper designated by the combination sorting signal and causes the discharge to the collection chute 19. The lumps are gathered together in a collecting chute 19, and when a timing hopper 20 hears, they fall into a packaging machine 21 and are packed into bags.

When the weighing hopper is empty, the content in the intermediate hopper is discharged to the weighing hopper, but during this time, the remaining weighing hoppers similarly sort out the combinations and move them to the collection chute 1.
It is discharged at 9.

In this way, the combined discharge is performed while sequentially storing the lumps in the metering hopper of the discharge stream.

For example, if the weighing device weighs 10 g, the number of weighing hoppers is 20@ as shown in FIG. Assume that the ingredients are combined in a 4g weighing hopper.

As shown in FIG. 6(a), first, a plurality of lumps are stored in the weighing hoppers of phases ① to [phase] as described above, and four weighing hoppers are taken out of 20 g.xC+=4845 The combination weight is calculated based on the exact combinations, and the combination closest to the set weight is determined. As a result, if, for example, ■, ■, ■, or @ is selected, the contents of these weighing hoppers are discharged and collected as shown in FIG. 6(b).

Next, as shown in Figure 6 (C), there are 1820 combinations in which 4 weighing hoppers are taken out of the remaining 16 during refilling of ■, ■, ■, @. The combination is determined by calculating the combined weight. For example, ■,
When ■, ■, ■ are selected, the contents of these weighing hoppers are discharged and collected as shown in FIG. 6(d). During this time, ■, ■, ■, @ are filled, so next, as shown in Figure 6(e), 16 excluding ■, ■, ■, @ is filled.
Combinations are determined among the four weighing hoppers, and the contents are discharged and collected from the four selected weighing hoppers, as shown in FIG. 6(f). Thereafter, similar combined discharge is performed while repeating discharge and filling.

For example, when a pair of weighing hoppers installed on the same measuring instrument are combined, as shown in ■ and ■,
and must be refilled at different times. In this case, for example, even if ■ is refilled, as long as ■ is not refilled, inquiries are determined based on 15 @ weighing hoppers instead of 16.

In this way, in the combination weighing device of the above embodiment, as is clear from a comparison with FIG. 6 and FIG. Since a combination can be selected from among the points (the number of points is 2@), the number of combinations increases significantly. Therefore, a larger number of combinations can be obtained even if the number of scales is smaller than that of the conventional device. Therefore, it is possible to always obtain the combination lff1 with an extremely small difference from the set weight.

In the above embodiment, the case where two weighing hoppers are provided for the -9 weighing hopper is illustrated, but it is also possible to have three or more, and if there are three or more, the number of combinations will further increase. Therefore, a large number of combinations can be obtained even with a measuring device having fewer layers.

In addition, the combination meter ffi device of the present invention can also be used as a combination number scale that divides the input amount of lumps supplied to each hanging hopper by a set unit weight to obtain the equal number of pieces, and then combines this number. .

Since the combination ff1ffi device of the present invention is configured as described above, it has the following effects.

(1) Even if the number of scales is reduced, a large number of scales can be obtained, which reduces the cost of the device and improves accuracy.

(2) Since the number of measuring instruments can be reduced, maintenance becomes easier and reliability of measurement is improved.

[Brief explanation of the drawing]

Figure 1 is a schematic configuration diagram showing a conventional combination weighing device, Figure 2
The figure is an explanatory diagram of its operation, Figure 3 is a schematic configuration diagram not showing an embodiment of the present invention, Figures 4.5 are schematic diagrams showing an example of the configuration of a measuring instrument and a weighing hopper, and Figure 6 is an explanation of its operation. It is a diagram. 11...Supplier, 12...Circular feeder, 131-13n...Feeder, 141-1
4n...Intermediate hopper, 151~15n...
...Discharge gate, 161-162n...Weighing hopper, 171-17n...Measuring device, 181
~182n... Emission goo!・、19・・・・・・
・Collection chute, 20... Timing hopper, 21... Packing machine, 22... Control ll
Device, 23... Emission control 11 device, 24...
...Weight value storage circuit, 25... Combination selection circuit, 26... Supply 'n device, 30a, 30a
n...Operating rod, 33a, 33a+bi...
Roller, 34a, 34an...Cam mechanism, 35
...Weighing stand. Figure 1 Figure 2 Ward ■■■■■■■■■・ (0) 'V V V '¥I Y'? iV
V vV(b) \, / V X, / V V X,
/ V V V X, / (C) V V
V V V V V V
V V(d) 'i7 X, / V
V X, / V XJ \, / V V
('') V V V V V V V V V V V'
(f) VV \11 \, / V \, / V V\,
/ V Figure 4 Figure 5 + 6 (1 + 1 7a Figure 6

Claims (1)

[Scope of Claims] A plurality of measuring instruments; an object to be measured is received in correspondence with at least one of the measuring instruments, and the objects to be measured are connected to each other by a switching means so that the objects to be measured are individually weighed by the measuring instruments; A combination selection means for participating in a combination calculation of an object to be weighed receptacle having a plurality of independent receiving points and a weight value of the object to be weighed for each of the receiving points obtained based on output signals of each of the plurality of weighing devices. and a supply mechanism that selectively supplies the object to be weighed to the plurality of receiving locations.