JPS58108413A - Weighing method - Google Patents

Abstract

PURPOSE:To increase the accuracy of the packed weight of an article consisting of unit articles having different weights, with each other, by a method wherein unit articles are loosely packed into a container and weighed, and combination calculation is carried out with the loosely packed weight measuring signal included in weighing signals at all times, and according to the results, unit articles are supplied from a tightly packing-weighing device. CONSTITUTION:Unit articles are loosely packed into a container 4 from a loosely packing hopper 8. The container 4 is carried by a weighing conveyor 10 to the position under a concentrated hopper 12 and weighed. On the other hand, above the hopper 12, tightly packing-weighing tanks 13 to 16 are provided to weigh unit articles having different weights with each other. A loosely packed weight is detected, and weighing signals from the respective tightly packing- weighing tanks are variously combined. A combination having a value equal or closest to a lower-limit weight is selected from the combinations obtained by adding the loosely packed weight measuring signal to the respective combined weighing signals. The container 4 is tightly packed with unit articles from the tightly packing-weighing tank related to the combination, thereby controlling the packed weight of the unit articles into the container 4 at a high accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a weighing method for filling a container with articles whose individual weights are not constant, such as pieces of meat and pieces of vegetables.

Conventionally, there have been methods for automatically filling containers with articles of varying weight as described above, using a table feeder or a rotary feeder.

This method could only be filled, and the filling weight could not be controlled. Therefore, in order to improve the accuracy of the filling weight, it is necessary to weigh the container after filling and manually correct the weight based on the weighing result, resulting in low work efficiency.

The purpose of the present invention is to provide a weighing method that can fill containers with articles with high precision in filling weight and high work efficiency. The container is transferred to the filling position, and a combination calculation is performed with the coarse filling measurement signal always included in the measurement signal from the fine filling measuring tank provided near the fine filling position, and the fine filling measuring device corresponds to the calculation result 15. It is used to fill containers with goods.

The present invention will be explained below based on one embodiment shown in the drawings.

In FIG. 1, reference numeral 2 denotes a carry-in conveyor, and the containers 4 sent by this conveyor are conveyed to the lower part of a rough filling hopper 8 by a conveyor 6 at the next stage. Here, the container 4 is roughly filled with articles from the rough filling hopper 8 . In theory, the individual weights of this article are not constant. The roughly filled container 4 is conveyed by the weighing conveyor 10 to the lower part of the collection hopper 12, where the roughly filled articles are weighed.

Further, above the collecting hopper 12 are fine filling measuring tanks 13 to 1.
6 is provided. These precision filling measuring tanks 13 to 16
is weighing items whose individual weights are not constant.

As shown in FIG. 2, the rough filling weighing signal from the weighing conveyor 1o is directly supplied to the adder 18, and the weighing signals from the fine filling weighing tanks 13 to 16 are supplied to the adder 18 via normally open switches 19 to 22. be done. These normally open switches 19 to 2
Opening/closing is controlled by the 21d combination generator 24. That is, it is composed of a combination generator 24ilt and a binary four-stage counter, and the normally open switch 19 is connected to the combination generator 24ilt.
is closed during the period when the output of the first stage of the combination generator 24 is at H level, and the other normally open switches 20 to 22 are
．． It is closed during the period when the output of the fourth stage is at H level. Therefore, by incrementing each stage of the combinational generator 24 in turn, the output of the precise adder 18 is set to each (2-1).
A combination of the fine fill weighing signals plus each coarse fill weighing signal is generated.

Each output of the adder 18 is sequentially supplied to the determination circuit 26, where it is compared with the upper limit weight set in the upper limit weight setter 27 and the lower limit weight set in the lower limit weight setter 8. When the output of the combination generator 24 has a value between the upper limit weight and the lower limit weight, a judgment circuit 26II'i is added to each stage of the combination storage zq, which corresponds to each stage of the combination generator 24.
The output of each stage of the combination generator 24 at that time is stored. At the same time, the upper limit weight of the upper limit weight setter 27 is updated to the output of the adder 18 at that time.

Adder 1 is added to the value between the new upper limit weight and lower limit weight.
8, the stored value of the combination memory 24 is updated to the output of each stage of the combination generator 24 at that time, and at the same time, the set value of the upper limit weight setter 27 is updated to the value of the adder 1 at that time.
The output is updated to 8. Repeat this from now on. Therefore,
When all the combinations are completed, among the stages of the combination storage 24, the stage corresponding to the precision filling measuring tank that constitutes the combination that is equal to or closest to the lower limit weight becomes H level. Combination memory gq among precision filling measuring tanks 13 to 16
Articles are filled into the container 4 via the collection hopper 12 starting from those corresponding to the stage at the H level.

The container 4 that has been filled in the fine filling measuring tank is carried out to the next process by the carrying out conveyor 30 shown in FIG. In addition, among the fine filling measuring tanks 13 to 16, the containers 4 are filled with new articles from the supply hoppers 31 to 34 located above the filled fine filling measuring tanks, and the next combination is made. Prepare for weigh-in.

According to this weighing method, the container 4 is roughly filled, the weight of the rough filling is detected, the weighing signals of the fine filling weighing tank are variously combined, and the rough filling weighing signal is added to each combined weighing signal. Select a combination that is equal to or closest to the lower limit weight, and precisely fill the container 4 from the precision filling measuring tank related to that combination, and control the filling weight into the container 4 with high precision and high work efficiency. Become.

In the above embodiment, the containers 4 are transferred to each conveyor 2.6.10.
30, but other conveying devices may be used. Furthermore, although the roughly filled containers 4 were weighed at the lower part of the central hopper 12, the conveyor 6 at the lower part of the roughly filled hopper 8 may be used as a weighing conveyor, and the weighing may be performed at the lower part of the filling hopper 8. may be a normal conveyor, a weighing conveyor 10 may be provided between the normal conveyor and the conveyor 6, and the weighing may be performed using this weighing conveyor. Further, although the number of precision filling measuring tanks is four, the number can be increased or decreased as appropriate. Furthermore, for the combination measurement, a combination equal to or closest to the lower limit value is selected, but a combination equal to or closest to the upper limit value may be selected.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of a device used in the measuring method according to the present invention, and FIG. 2 is a block diagram of the device. Hopper, 10...Measuring conveyor, 13 to 16...
Precise filling measuring tank, 18... Adder, 24... Combination generator, 26... Judgment circuit, and... Combination storage device. Patent applicant House Foods Industry Co., Ltd. Daiwa Seisho Co., Ltd.

Claims (1)

[Claims] (1) A process of roughly filling a container with articles, a process of transporting the container to a fine filling position, a process of measuring the rough filling weight at the rough filling position, the fine filling position, or a position between them; A combination of various combinations of weighing signals from a plurality of fine filling weighing tanks provided near the fine filling position, in which the value obtained by adding the above rough filling weight signal to each combined weighing signal is equal to or close to a predetermined value. A weighing method comprising the steps of: selecting one of the above combinations; and filling the container with an article from the fine filling weighing tank corresponding to the selected combination.