JPH0723141B2 - Constant weight packaging method for chicken eggs - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is a packaging unit in which eggs of different weight categories are partially selected while utilizing the weight categories of eggs based on the Ministry of Agriculture, Forestry and Fisheries trade standard. TECHNICAL FIELD The present invention relates to a constant weight packaging method for eggs that can be mixed and packaged so that eggs belonging to different weight categories are mixed so that a predetermined number of pieces have a set weight.

(Prior Art) As is well known, when selling eggs, they are classified into the following 6 grades (hereinafter, also referred to as “grades”) based on the trading standards of the Ministry of Agriculture, Forestry and Fisheries.

That is, SS grade (40g to less than 46g), S grade (46g to less than 52g), MS grade (52g to less than 58g), M grade (5
8g to 64g), L grade (64g to 70g), 2L
Grades (70g to less than 76g), 6 weight categories.

Currently, within the weight categories, a specified number of eggs of the same grade are packed and packed (hereinafter,
A certain number of chicken eggs packed in a container is also called a “pack”. ). As described above, there are many automatic sorting and packaging apparatuses that select and pack a predetermined number of eggs of the same grade, and the processing capacity thereof is increasing year by year by equipping a computer.

(Problems to be solved by the invention) By the way, eggs sold in supermarkets are
Most of the M and L grades have a high unit price per kg for M and L grade eggs, and kg for other grades.
Currently, the unit price is low.

Therefore, in order to reduce such a difference in unit price of kg, M
・ L-grade eggs are mixed with other grade eggs as appropriate
The pack is sold so that the weight of the pack is almost constant. In this case, however, it is the current situation that the eggs that have been packaged for each grade are manually removed, mixed, and repackaged. . However, such a method has a problem that it is costly and causes rupture of eggs, and that it is practically impossible to package in large quantities.

In addition, there has been an increasing demand for a mixed pack in which a predetermined number of eggs of a plurality of grades are packed into a substantially constant weight without sticking to a conventional egg pack that packs a predetermined number of eggs for each grade.

In addition, as a weighing method in which a lumpy article with variations in unit weight is sequentially weighed, and a predetermined number is contained within a certain weight range,
There is a method disclosed in Japanese Examined Patent Publication No. 57-29651, but this method is a so-called batch method and cannot be used for automatic sorting and packaging of chicken eggs for single-row transportation, non-stop, and large-volume processing. It is a thing.

The present invention has been made to solve the above-mentioned problems, and a packaging line for selecting and packaging a predetermined number of eggs of the same grade can be used as it is, for example, a grade 4 (MS,
A packaging line (hereinafter referred to as "M, L, 2L) that selects a predetermined number of eggs in a transport order while the eggs are being transported in a single row and wraps them at a predetermined target weight. It is intended to provide a constant weight packaging method in which a predetermined number of chicken eggs satisfying the target weight can be selected and packaged as one packaging unit in this mixing line. is there.

(Means for Solving Problems) A constant weight packaging method for eggs according to the present invention is to measure individual egg weights of a group of eggs to be packaged by the weighing means and store the measured value by the storage means, Used in combination when selecting a predetermined number of eggs by the calculation means so as to satisfy the target weights for one package set in advance while the eggs are sequentially transferred in a single row by the transfer means. The weight range of the eggs to be set is set corresponding to each target weight so that a part of the weight range is common, and the weight of the eggs contained in the common range is newly divided by dividing the common range into two. Within the weight range set in 1., the weight of the eggs is used in combination as the weight of the eggs that make up the target weight that does not include the weight of the eggs, and It is judged whether the target lower limit weight and target upper limit weight of the nth chicken egg set by setting the allowable range to the value obtained by multiplying the average weight of the divided egg by n times are satisfied. It is determined whether or not the target lower limit weight and the target upper limit weight corresponding to the other target weight are satisfied, and a predetermined number of selected eggs are provided corresponding to each target weight on the conveying path of the conveying means. It is configured to be packaged as one packaging unit by the packaging means.

(Operation) In the present invention, a predetermined number of eggs of the same grade are selected and packed, and the packaging line is used as it is. For example, in order to mix and package chicken eggs of grade 4 (MS, M, L, 2L), From the central value 55g of the MS grade weight category to the central value 67g of the L grade weight category and from the central value 61g of the M grade weight category
The weight of the 2L grade weight range and the range up to 73g are the weight of the eggs used for each combination (hereinafter referred to as "egg weight").
Also called. ) As a range, a part of the egg weight range is common 61-67
The egg weight that satisfies g is divided into two parts, the common weight range is 61 to 64 g and the egg weight range is 64 to 67 g, and it is determined which range is included and the egg weight range is 61 to 64 g. If included, the egg weight range should be 61-73g and the egg weight range used for the combination should be the egg weight to obtain the target weight.
If contained in 64-67g, the egg weight range 55-67g and the egg weight to obtain the target weight as the egg weight range used in combination, further, calculate the average weight of the selected eggs, By setting an allowable range for this average weight and calculating the target lower limit weight and upper limit weight of the selected eggs, a predetermined number of eggs are selected according to the target lower limit weight and upper limit weight, and the packaging place is decided. , Many eggs that can be used in combination can be selected, and a packaging line for obtaining the target weight for one package has been added to the conventional packaging line, so eggs that satisfy the target weight with a specified number of eggs Can be collected as a package of chicken eggs, whereby a chicken egg pack in which eggs of a plurality of grades are mixed can be obtained.

(Example) A preferred example of the present invention will be described with reference to the drawings.

FIG. 6 is a schematic plan explanatory view of an egg sorting and packaging apparatus for carrying out the constant weight packaging method of eggs according to the present invention. In the figure, 51 is a weighing machine for individually weighing eggs 56, and 52 is weighing. This is an arithmetic unit composed of a micro computer that selects a predetermined number based on the weight of the eggs 56 while the subsequent eggs 56 are being conveyed in a single row by the conveyor 59. Further, 57 is an arithmetic unit
A packaging device for packaging a predetermined number of eggs 56 selected by 52 as one packaging unit, which is provided on the transportation path of the transportation conveyor 59, and in the present embodiment, MS, M, L, 2L, SS, S, 3L. In addition to seven packaging lines for packaging grade eggs for each grade, a mixing line M'based on the central value of the M grade weight category to obtain a package of chicken eggs 56 satisfying the target weight with a predetermined number And a mixing line L'which is also based on the central value of the L grade weight section. Also, 54 is
A shutter for releasing the eggs 56 transported in a single row to a packaging container 60 (for example, a 10-packed plastic container) 60 waiting in the packaging device 57 according to a command from the arithmetic device 52, and is provided for each packaging device 57. There is. Also, 59 is an egg after weighing
A conveyor for sequentially transporting 26 in a single row.

Next, the operation of the egg sorting and packaging apparatus will be described based on the block diagram shown in FIG.

In the figure, 58 is an encoder attached to the rotary shaft 53 of the transfer conveyor 59. 55 is a driver of a DC motor that moves the belt conveyor of the packaging device 57, and in this embodiment, in addition to the 7 lines (MS, M, L, 2L, SS, S, 3L) packaging line, a mixing line M Since one line is provided for each of 'and L', the lines in the figure are actually nine lines.

Usually, the eggs 56 are conveyed in 6 rows, so the weighing machine 51 is provided for 6 rows, and the eggs 56 weighed by the weighing machine 51 are provided.
Are transferred from the 6th row to the single row, and at this time, the weight of the egg 56 is synchronized with the position of the egg 56 on the conveyor 59 by the encoder 58 and the photo sensor attached to the rotary shaft 53. Corresponding to the rotation detection signal of
Entered in 52.

Further, the computing device 52 computes the egg wrapping place according to the flow chart to be described later, and sends an operation signal to the shutter 54 based on the computation result. The shutter 54 is actuated by an operation signal from the arithmetic unit 52, and waits for the transported eggs 56 from the transport conveyor 59 on the packaging device 57, that is, the grade-specific packaging line or the mixing lines M ′, L ′. Release to 60. Further, the operation device 52 outputs an operation instruction to the DC motor driver 55 of the packaging line and the mixing line M ′, L ′, and the driver 55 outputs the operation device 52.
In response to the operation instruction from the DC motor, the DC motor is operated, and the belt conveyors of the packaging line and the mixing lines M'and L'are made to step half or all steps. In the half step instruction, the loading of the eggs 56 in the first row of the packaging container 60 is completed, and the movement of the belt conveyor for about half of the packaging container 60 is performed to load the eggs in the second row. In the step-by-step instruction, the loading of the eggs 56 into the second row of the packaging container 60 is completed, and the movement of the belt conveyor about the width of the packaging container 60 is performed so that the eggs are loaded into the next container 60. To be done.

Further, the arithmetic unit 52 stores a calculation program for obtaining the packaging of the mixed packs having different target weights in the mixing lines M ′ and L ′. In this calculation program, the stored weight of the chicken egg is When a part of the weight range of the eggs that can be used for the combination is included in the common range of the weight ranges of the eggs that are set in advance so as to correspond to the mixing lines M ′ and L ′, The weight of the hen's egg used as a weight of the hen's egg constituting the target weight corresponding to the weight range not including the weight of the hen's egg within the weight range newly set by dividing the common range into two. Satisfies the target lower limit weight and target upper limit weight of the n-th egg set by setting an allowable range for the value obtained by multiplying the average weight of the egg by n times the target weight by a predetermined number. If it is satisfied, select it, and if it is not satisfied, select the chicken egg by judging whether the target lower limit weight and the target upper limit weight corresponding to the other target weight are satisfied, An operation signal is sent to the shutter 54 corresponding to the mixing line for discharging the eggs.

Next, the weight range of the eggs used in the combination will be described.

Figure 2 is an explanatory view of the weight range of eggs used for combination, MS, M, L, 2L shows the central value of each weight category, and sections c and d show the common weight range. Show. In other words, within the framework of the four weight categories MS, M, L and 2L, the mixing line M'for selecting egg weights in the weight range 55 to 67 g based on the center value 61 g of the M grade and the center of the L grade Value 67
Constant weight packaging is carried out with the mixing line L'which selects an egg weight in the weight range of 61 to 73 g based on g. Therefore, section c
Weight range 61-64g and range d weight range 64-67g will be selected for both, so weight range 61
-67g divided by weight value 64g for 2 minutes, the weight range of section c is 61-64g
The egg weight contained in is originally packaged as a chicken egg in a mixed pack based on the M grade, so it is selected for the mixing line L ', and the egg weights included in the weight range of 64 to 67 g in the section d are mixed in the same manner. The line M'is selected.

Next, a method of calculating the target lower limit weight and the target upper limit weight of the n-th egg will be described based on Table 1.

In the present embodiment, the predetermined number of 10 pieces is selected as one packaging unit for sorting and packaging. In Table 1, L3 (1 to 10)
Is the target lower limit of egg weight for selecting the 1st to 10th eggs (weight in pack (lower limit)), and H3 (1-10) is the same target upper limit of egg weight (weight in pack (upper limit) )), M1 is the average egg weight obtained by dividing the target weight by the predetermined number (1 / NPg of the set weight), and H1 is the upper limit weight of the egg weight used for the combination (predetermined egg). 1 upper limit weight), L1 is also the lower limit weight (one predetermined lower limit weight of the egg weight), H2 is the upper limit weight of the target weight, and L2 is the lower limit weight of the target weight.

The first target lower limit weight is L3 (1) = 2M1-H1, that is, the value obtained by subtracting the upper limit weight H1 of the egg weights used in the combination from the two average egg weights M1.

Further, the first target upper limit weight is H3 (1) = 2M1-L1, that is, the value obtained by subtracting the lower limit weight L1 of the egg weight used for combination from the two of the average egg weight M1.

Therefore, target lower limit weight L3 (1) and target upper limit weight H3 (1)
An egg weight within the range of and is selected as the first chicken egg.

In addition, the allowable error provided in the value obtained by multiplying the average egg weight by n times in order to obtain the target lower limit weight and the target upper limit weight will be described by using the formula of the first target weight range as an example.

The target lower limit weight is M1−H1 because L3 (1) = 2M1−H1 = M1 + M1−H1 = M1 + (M1−H1). This is the value obtained by subtracting the upper limit weight H1 of the egg weight used for combination from the average egg weight M1.
The target lower limit weight is the value obtained by multiplying the average egg weight M1 by 1 (M1
-H1) is added.

The target lower limit weight is M1−L1 since H3 (1) = 2M1−L1 = M1 + M1−L1 = M1 + (M1−L1). This is the value obtained by subtracting the lower limit weight L1 of the egg weight used for combination from the average egg weight M1.
The target upper limit weight of the first piece is a value obtained by multiplying the average egg weight M1 by 1 (M1
-L1) is added.

Furthermore, the second target lower limit weight is the value obtained by doubling the average egg weight M1 and (M1-H1), and the target upper limit weight is the value obtained by doubling the average egg weight M1 (M1 -L1) is added.

Table 1 shows the target lower limit weight and target upper limit weight of the 2nd to 9th egg weights calculated in the same manner, and the 10th target lower limit weight L3 (10) and target. Maximum weight H3
(10) is the lower limit weight L2 and the upper limit weight of the target weight, respectively
It is equal to H2.

Next, a calculation method for calculating a range for selecting the next egg weight (hereinafter, referred to as “selection range”) each time the egg weight is selected in sequence will be described based on Table 1.

For example, if the egg weight selected as the first egg is n (1), the selection range of the egg weight n (2) selected as the second egg is from the target lower limit weight L3 (2) to n (1). , And the value obtained by subtracting n (1) from the target upper limit weight H3 (2) {L3 (2) -n (1)} ≤ n (2) ≤ {H3 (2) -n (1)} From the table, substitute L3 (2) = 3M1−H1 H3 (2) = 3M1−L1 for {(3M1-H1) -n (1)} ≦ n (2) ≦ {(3M1-L1) -n (1)} …… (a)

Similarly, the selection range of the egg weight n (3) selected as the third egg is [L3 (3)-{n (1) + n (2)}] ≦ n (3) ≦ [H3 (3) From-{n (1) + n (2)}], [(4M1-H1)-{n (1) + n (2)}] ≤ n (3) ≤ [(4M1-L1)-{n ( 1) + n (2)}] ... (B).

The selection range of the 4th to 9th egg weights is calculated in the same manner.

Next, the selection method will be described based on the flowcharts shown in FIGS. 1, 3 to 5.

First, the content of the buffer provided in the arithmetic unit 52 for inputting the weight of the measured egg at the head of the buffer (storage means) is shifted by one (step 1), and the egg weight data is placed at the head of the buffer. (Step 2).
In order to calculate which packaging line the egg weight to be discharged is,
It is input into the buffer in the order of measurement and stored. Next, check whether the hen egg of this egg weight entered in the buffer is an abnormal egg and whether it satisfies the predetermined weight range as the hen egg that can be used in the combination to obtain the constant weight packaging this time. Performed in process I (step 3).

Abnormal eggs include bloody eggs, dirty eggs, and ruptured eggs. In the flow of the process I shown in FIG. 3, it is first judged whether or not the egg is an abnormal egg (step 8), and if the egg is an abnormal egg, it is marked as an abnormal egg so as to be completely excluded as a product (step 8). 9). If it is not an abnormal egg, it is judged whether the egg weight satisfies the egg weight range of 55 to 73 g (step 1
0) If they are not satisfied, the chicken eggs that cannot be used for combination are marked, and the weight according to the grade is attached as the weight of the chicken eggs to be packed by grade (step 11). If the egg weight satisfies the weight range, it is determined as a chicken egg that can be used for the constant weight packaging this time, and the egg is marked as a selectable egg (step 12), and the process I is terminated.

Next, it will be determined whether or not the egg weight marked as a selectable egg will be selected as a constant weight package in the future. When the egg weight is included in the section d shown in FIG. Gives priority to the determination for the mixing line M ′ first and, if included in the section c, the determination for the mixing line L ′ first, and the egg weight is set to the other sections a, b, e, f
If it is included in the section, the priority is given so as to judge it for the mixing line corresponding to the weight range of the section (step 4). Then, in step 5, it is determined whether the processing is first for the mixing line M'or for the mixing line L ', and on the M'side, first, the processing for the mixing line M'is performed in the processing II (step S6). 6) Then, in process III, the process for the mixing line L'is performed (step 7). On the L'side, first, the process for the mixing line L'is performed in process III (step 6 '), and then the process for the mixing line M'in process II (step 7'). That is, which of the mixed lines is determined for the mixed line depends on whether the priority is on the M '/ L' side, and the processing content is as shown in FIG.
The same applies to I and Treatment III. Therefore, a case in which the priority right is given to the M'side for processing will be described.

As a result of the judgment in step 5, processing II (step 6) is executed. That is, according to the flow of processing II shown in FIG. 4, it is first determined whether or not the selectable egg is marked as usable for constant weight packaging this time (step 1
3), jump to step 18 if not selectable eggs,
If it is a selectable egg, it is judged whether the weight in the pack including the egg weight satisfies the target lower limit weight and the target upper limit weight (step 14), and if not satisfied, the process jumps to step 18. If the target lower limit weight and the target upper limit weight are satisfied as a result of the determination in step 14, the process IV of step 15 is performed based on the flow shown in FIG. That is, in the process IV, the egg weight is set to the chicken egg selected as the constant weight packaging this time, the egg weight is added to the pack weight (total weight of the already selected egg weights), and Add 1 to (total of eggs already selected).

Next, in step 16, it is judged whether or not the predetermined number as one packaging unit has reached 10 by adding 1 to the number in the pack. Eggs that contain eggs and are transported earlier than this are marked as unavailable for future selection (step 17). If the result of the judgment in step 16 is not 10,
The process of step 17 is not performed and the process jumps to step 18.
In step 18, go back to a predetermined number of egg weights,
For the unselected egg weights, the 11th previous egg weight is set to determine whether or not there is an egg weight that satisfies the current target lower limit weight and target upper limit weight. Then, in step 19, step 20, step 21, step 22, and step 23, the same processing as the processing executed in steps 13 to 17 is performed.

By the way, in step 17, a predetermined number of 10 eggs are selected, and if it is determined that the eggs existing between these 10 eggs are not used for selection, step 19
Assuming that the egg is not a selectable egg in, jump to step 24.

It is judged whether or not all the egg weights from the 11th to the 1st before have been judged (step 24), and if judged all, the processing II is ended, and if not yet judged, the egg weight one lower is calculated. Set (step 25) and jump to step 19 again.

When the process II of step 6 is completed, the process II of step 7
In I, the determination as to whether or not the mixed line on the L'side can be selected this time is again executed according to the flow of FIG.

In this way, selectable eggs whose egg weights are selected for the M'or L'side mixing lines, or the target lower limit weight and target upper limit weight have not been satisfied, or chicken eggs marked not to be used for selection in the future And then jump to step 1 to process the egg weight input to the buffer.

Although the above description has been made for the mixing line on the M'side, the selection method is the same on the L'side as described above, and eggs of the egg weight not finally selected are packaged for normal grade packaging. It

Next, a specific selection method will be described using the egg weight table in Table 2 according to the program shown in the above flowchart.

The target weight set for the mixing line M'is 610 g and the target weight set for the mixing line L'is 670 g. Further, the predetermined weight range (egg weight range used for combination) is 55 to 73 g, and the weight range (egg weight range used for combination) of chicken eggs selected for the mixing line M ′ is 55 to 67 g. , Egg weight range selected for mixing line L '(egg weight range used in combination)
Is 61 to 73 g, and the weight range of 61 to 67 g is a common weight range. Therefore, the egg weights included in the sections c61 to 64g are first determined to be selected for the mixing line L ', and the egg weights included in the sections d64 to 67g are first selected for the mixing line M'. To be judged for. Since the target lower limit weight of the first egg for each mixing line M ', L'is the average weight 61g and 67g of the target weight 610g and 670g, the upper limit weight 67g and 73g of the egg weight is subtracted. , M ′ is 2 × 61−67 = 55 g, and L ′ is 2 × 67−73 = 61 g. The target upper limit weight is the average weight of the target weights of 61
It is the weight obtained by subtracting the lower limit weight 55g and 61g of the egg weight from the two of g and 67g, so that for M'is 2 x 61-55 = 67g and for L'is 2 x 67-61 = 73g. That is, the first target lower limit weight and the target upper limit weight for the mixing line M ′ are 55 to 67 g, and the first target lower limit weight and the target upper limit weight for the mixing line L ′ are 61 to 73 g.

Therefore, the first egg weight of 62.5 g in the egg weight table of Table 2 satisfies the selection range of the mixing lines M ', L'first, but 62.5 g corresponds to the conventional M grade weight classification according to the flowchart. However, since it is included in the section c, priority is given to select it for the mixed line L ', and it is determined whether it can be selected for the mixed line L'. As a result, the first egg weight of 62.5 g was the first selection range 6 for the mixing line L '.
Since it satisfies 1 to 73 g, it is selected as the first chicken egg in the mixing pack packed in the mixing line L '.

The first egg in the mixing pack to be packed in the mixing line M'is not yet selected, so the selection range is 55-67g.
Is. Since the first egg was selected for the mixing line L ', the target lower limit weight and target upper limit weight of the second egg are 3 to the average weight, respectively, and the upper limit weight of the egg weight is 73 g.
And the lower limit weight of 61 g is subtracted to obtain 3 × 67−73 3 × 67−61, and the selection range of the second egg weight is 3 × 67− by subtracting the selected first egg weight. 73-62.5 = 65.5g 3 x 67-61-62.5 = 77.5g, which is 65.5 to 77.5g.

The second 62.6 g of the egg weight table also corresponds to the conventional M grade weight classification and is included in the section c, so the priority is given to select it for the mixing line L ′, and the mixing line L ′ is selected. It is determined whether or not it can be selected for use. As a result, the second egg weight of 62.5 g does not satisfy the second selection range 65.5 to 77.5 g for the mixing line L ', so it is next determined whether it can be selected for the mixing line M'. To do. The egg weight of 62.5 g satisfies the selection range of 55 to 67 g set for the mixing line M ′, and thus is selected as the first chicken egg of the mixing pack packed in the mixing line M ′.

Next, the selection range of the second egg weight selected for the mixing line M ′ is 3 × 61−67−62.6 = 53.4 g, 3 × 61−55−62.6 = 65.4 g, and 53.4 to 65.4 g. Become. 3rd egg weight on the egg weight table 6
2.7 g is also selected as the second egg weight of the mix pack, which is also packed on the mix line M '.

Next, the selection range of the third egg weight to be selected for the mixing line M'is similarly calculated to be 51.7 to 63.7 g, and the fifth egg weight 59.1 g is 3 for the mixing line M '. Selected as the first item.

Next, the selection range of the fourth egg weight selected for the mixing line M ′ is 53.6 to 65.6 g, and the sixth egg weight 52.
7g is not selected because it does not satisfy any of the selection ranges.

The 7th egg weight is 61.5g, the 8th egg weight is 57.4g, the 9th egg weight is 64.0g, and the 10th egg weight is 56.9g.
Selected as the fourth, fifth, sixth, and seventh chicken egg for

Next, the selection range of the eighth egg weight that can be selected for the mixing line M'is 57.8 to 69.8 g, and the selection range of the second egg weight that can be selected for the mixing line L'is 65.5 to 77.5 g.
The 11th egg weight 65.7g satisfies both the selection range on the mixing lines M ', L', but 65.7g
Is the L grade in the conventional weight classification, and since it corresponds to the section d, priority is given to select it for the mixing line M '. Therefore, it is selected as the eighth chicken egg for the mixing line M '.

Similarly, the 12th egg weight of 60.5 g is also selected as the ninth egg.

The selection range of the 10th egg weight selected for the mixing line M ′ is the weight obtained by subtracting the total weight of the 9th egg from the lower limit weight of the target weight and the 9th egg from the upper limit weight. It is the range of the weight that is obtained by subtracting the total weight of. In this example, the lower and upper limits of the target weight were set to ± 15 g, so the selection range of the 10th egg weight is 44.9 to 76.0 g,
Since the predetermined egg weight range is 55 to 67 g, this range is the 10th selection range. Therefore, the 13th egg weight
63.2 g is selected as the tenth egg for the mixing line M ', and in the mixing line M', the selection of one package of the mixing pack is completed, and the egg of the next mixing pack is selected. However, although only the first chicken egg has been selected for the mixing line L ′, mixed packaging (constant weight packaging) for the mixing line L ′ can be sequentially obtained by the same selection method.

The eggs that can be used in the combination are not limited to the 4 grades of MS, M, L and 2L, and all grades including SS, S and 3L may be used. In this case, only the unselected eggs May be grouped in different packaging lines, and the flow chart remains largely unchanged.

In addition, target lower limit weight L3 (n) and target upper limit weight H3 (n)
May be L3 (n) = M1 * n-MH3 (n) = M1 * n + M obtained by multiplying the average weight M1 by n times, respectively.

(Effects of the Invention) According to the present invention, for example, eggs from MS grade to 2L grade are used, and the center value of the weight category of M grade is used as a reference, and the weight category of L grade from the center value of the weight category of MS grade. 2L from the central value of the weight category of M grade, with the central value of the L grade weight category as the reference, up to the central value of
The weight range of the eggs up to the central value of the grade is selected as the weight range of the eggs, and the weight ranges are partly common. Eggs included in the common range should be selected by setting conditions. As a result,
About 90 for a mixed pack that satisfies the target weight with a predetermined number
You can select with a probability of%. As a result, chicken eggs can be sold in a new mixed pack that is not restricted to conventional grade packs, and fluctuations in the kg unit price due to the size of chicken eggs can be suppressed, which has a great effect on packaging management.

[Brief description of drawings]

FIG. 1 is a flow chart for explaining a selection method in the constant weight packaging method of chicken eggs according to the present invention, FIG. 2 is a diagram showing a weight range of chicken eggs, and FIG. 3 is a detailed procedure of process I shown in FIG. FIG. 4 is a flowchart explaining the detailed procedure of processing II and processing III shown in FIG. 1, and FIG. 5 is a flowchart explaining the detailed procedure of processing IV shown in FIG. FIG. 6 is a schematic plan view of a sorting and packaging apparatus for carrying out the constant weight packaging method for chicken eggs according to the present invention, and FIG. 7 is a block diagram for explaining the operation of the sorting and packaging apparatus shown in FIG. 51 …… Weighing machine, 52 …… Computing device 53 …… Rotary axis, 54 …… Shutter 55 …… DC motor driver 56 …… Egg, 57 …… Packing device 58 …… Encoder, 59 …… Conveyor M ', L ′ …… Mixing line

Claims (1)

[Claims] 1. The weight of individual eggs of a group of eggs to be packaged is measured by the measuring means, the measured value is stored in the storage means, and the group of eggs is sequentially conveyed in a single row by the conveying means. , When selecting a predetermined number of eggs by the calculating means so as to satisfy the target weights for one package set in advance, the weight range of the eggs used in the combination is partly common Set according to each target weight,
The weight of the eggs contained in the common range is defined as the target weight corresponding to the weight range not including the weight of the eggs in the weight range newly set by dividing the common range into two. Used in combination as a weight, the weight of the egg is a target lower limit weight of the n-th egg set by setting an allowable range to a value obtained by multiplying the average weight of the egg by dividing the target weight by a predetermined number by n. If it does not satisfy the target upper limit weight, if not, it is determined whether the target lower limit weight and the target upper limit weight corresponding to the other target weight is satisfied, and the selected predetermined number of eggs A constant weight packaging method of eggs, wherein the packaging means is provided as one packaging unit by the packaging means provided corresponding to each target weight on the transportation path of the transportation means.