JP2678169B2 - Combination weighing device by weight rank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a combination weighing apparatus according to weight rank, which is capable of sorting a large number of articles of the same kind having different weights by weight rank and then combining and weighing the articles into a predetermined weight. Regarding

(Prior Art) A combination weighing device used when a plurality of food products such as agricultural products and marine products, or other products of which the individual weights are not constant are collected into a product of a predetermined weight. Is equipped with a plurality of weighing machines, weighs the weight of the articles respectively supplied by these weighing machines, and performs a combination calculation on the weighing values obtained by each weighing machine,
It is configured to find an optimum combination that matches or is closest to the target weight. According to this, only the articles having the measured values corresponding to the above-mentioned optimum combination are gathered to obtain a predetermined weight. The product will be obtained.

On the other hand, foods such as chicken eggs may be sorted according to their individual weights according to weight ranks such as L, M, and S, and a certain number of foods of the same weight rank may be combined into one product. In this case, even if the products are of the same weight rank, only the products whose weight is close to the upper limit of the weight rank are collected as the respective products constituting the product, and the products of which the weight is close to the lower limit are collected. There will be a big difference in the weight of the product as a whole. Therefore,
For such products, the products may be identified by weight rank, and then the products of the same weight rank may be combined and weighed by the combination weighing device to weigh the entire product to a predetermined weight.

Further, with regard to food such as mushrooms, conventionally, it has been measured by combination weighing to a predetermined weight to make one product, but there is a request to make the sizes of the respective products constituting the product as uniform as possible. Therefore, in this case as well. First, each item is identified by weight rank, and then the items of the same weight rank are combined and weighed.

According to Japanese Patent Laid-Open No. Sho 62-182009, a function of selecting each item by weight rank and a function of performing combination weighing on the items of the same weight rank selected by the above target products. A device with and is shown.

(Problems to be Solved by the Invention) However, the device disclosed in the above publication automatically calculates and weighs articles while stocking them while conveying them, and after sorting the stocked articles by weight rank,
A combination calculation is performed on the articles of the same rank, and the articles selected in the combination of the predetermined weight by the calculation are automatically discharged to the packaging line of the corresponding rank.
Therefore, according to this device, a large number of articles must be conveyed and stocked during the period from weighing to discharging, so that the carrying device becomes large-scale, and the weight of the stocked articles is stored and stored Since it is necessary to shift the memory in synchronization, the circuit configuration of the control device becomes complicated. Further, since the same number of packaging lines and discharge devices as the weight rank types are required, the size of the device becomes large in proportion to the weight rank types.

Therefore, the present invention is a weighing device having a small number of weighing machines and a simple configuration, as a weighing device capable of performing the sorting work according to the weight ranks of the above-mentioned articles and the combination weighing work for the articles of the same weight rank. The challenge is to realize a new weighing device.

(Means for Solving the Problems) In order to solve the above problems, the present invention is characterized in that it is configured as follows.

That is, the combination weighing device according to the weight rank according to the present invention,
A large number of weighing machines and work modes are provided, in which a large number of articles of the same type with different weights are sorted by weight rank, and these articles are combined into a predetermined target weight for each weight rank to obtain a product of a predetermined weight. And a mode setting means for setting the sorting mode or the combination mode, and in the sorting mode, the weight rank of each article supplied to each weighing machine is determined based on the weighing value obtained by the weighing machine. A weight rank determination means and a combination calculation means for calculating a combination of articles having a predetermined target weight based on the weight values of the articles of the same weight rank supplied to the respective weighing machines in the combination mode. It is characterized by

(Operation) According to the above configuration, in the state where the work mode is set to the selection mode by the mode setting unit, the weight rank determination unit determines the weight rank of the article supplied to each weighing machine. Therefore, each article is sorted by weight rank. Then, the operation mode is switched to the combination mode by the mode setting means, and the articles of the same weight rank are supplied to the weighing machines, respectively, and the combination calculation means determines the total value of the articles to be a predetermined value. The optimum combination of articles that weighs or approximates the target weight is sought. Therefore, by collecting only the products that correspond to this optimum combination, it is possible to obtain products in which the total weight is a predetermined weight and the individual products belong to the same weight rank. In particular, according to this weighing device, a plurality of weighing bases are shared by the above-mentioned weight selection work and the combination weighing work.

(Examples) Hereinafter, examples of the present invention will be described.

First, referring to FIG. 1, an explanation will be given of the overall structure of the combination weighing device for each weight rank according to the present embodiment.
Includes a control unit 2, four metering units 3 ₁ to 3 ₄ connected to the device 2, to the control unit 2 and an operation box 4 provided integrally. Then, the first weighing unit 5 ₁ is attached to the first weighing unit 3 ₁ , and the second weighing unit 3 ₂ is attached to the second weighing unit 3 ₂ .
The fourth weighing machine 5 _{2 to} 5 ₄ attaches to the 3rd weighing unit 3 ₃ to the 5th to 7th.
Weighing machine 5 _{5-5 7,} together with the fourth metering unit 3 eighth to tenth weighing machine 5 _{8-5 10 4} are respectively provided, each weighing machine 5
Each display lamp ₆₁ through ₁₀ is attached to the _{1-5 10.} Further, the operation box 4 includes a key input section 7 used for setting a work mode, upper and lower limit values of weight rank, and target weight for combination weighing, and setting values and weighing weight values as described above. And a display unit 8 for displaying.

Next, the control system of the weighing device 1 will be described with reference to FIG. 2. The control device 2 includes the CPU 11, the RCO 12 and the RAM 13 connected to the CPU 11, and the first and second devices for connecting these to an external device. It is composed of input / output control units 14 and 15.
In addition, each of the weighing machines 5 _{1 to} 5 ₁₀ has a weight detection unit 1
16 and 16 and A / D converters 17 ... 17 for A / D converting the weight signals obtained by the detectors 16 ... 16. And these A / D
The signals from the converters 17 ... 17 are the first signals in the control device 2.
It is input to the input / output control unit 14, and the lighting control device is attached to the display lamps 6 _{1 to} 6 ₁₀ attached to the weighing machines 5 _{1 to} 5 ₁₀ from the control device 2 via the first input / output control unit 14. It is supposed to output. Further, an input signal from the key input unit 7 in the operation box 4 causes the second input / output control unit 15 to the control device 2.
In addition to being input via the second input / output control unit 15, the control device 2 outputs a display signal to the display unit 8 of the operation box 4.

Next, the operation of the weighing device 1 will be described with reference to FIGS.

First, at the start of the work, according to the flowchart of FIG. 3, data registration work of a set value used for selection of a weight class and a set value which is a target weight for combined weighing is performed. Here, in this work, each item is sorted into three weight ranks R ₁ , R ₂ and R ₃ in order from the one having the largest weight, and the items of these ranks R _{1 to} R ₃ have different target weights. Weigh in combination with W ₁ , W ₂ and W ₃ .

In this case, the first set value r ₁ and the second rank R that are the upper limit value of the third rank R ₃ (the lower limit value of the second rank R ₂ ) are set values for weight selection for one type of article. _2nd set value r ₂ (r ₁ >, which is the upper limit of ₂ (lower limit of 1st rank R ₁ )
r ₂ ) and are registered, and each target weight is set as a set value for combined weighing for each rank R _{1 to} R _3.
The first set values w _{11 to} w ₃₁ corresponding to W ₁ to ₃ and this target weight
Will register the second set value w ₁₂ to w ₃₂ to be the upper limit of the tolerance range _{(w 11 <w 12, w} 21 <w 22, w 31 <w 32) for W ₁ ~ _3.

That is, in step S ₁ of the flowchart of FIG.
After setting the work mode to the registration mode by operating the predetermined keys of the key input unit 7 shown in FIGS.
The first call number A ₁ for the article A which is S ₂ , S ₃ is input and stored, and the first set value r ₁ for weight sorting is input and stored in steps S ₄ , S ₅ . Step S ₆ ,, S
_{At 7} , the operation of inputting and storing the second set value r ₂ is performed. Then, it performs again the above steps S ₂ to S ₇ from step S _8,
Next, after inputting and storing the second calling number A ₂ , the first setting value w ₁₁ which is the target weight of the first rank R ₁ and the second setting which is the upper limit value of the allowable error range for this target weight. value
Each operation of inputting and storing w ₁₂ is performed, and similarly for the second rank R ₂ , the third calling number A ₃ , the first and second set values w
_{The operations} of inputting and storing ₂₁ and w ₂₂ and inputting and storing of the fourth calling number A ₄ , first and second set values w ₃₁ and w ₃₂ are performed for the third rank R ₃ . Further, in the case of simultaneously processing a large number of kinds of articles B, C ... At the same time, these articles B, C ... Also have the same call numbers B _{1 to} B ₄ , C _{1 to} C ₄ ,. Register the setting value and.

As a result, as shown in FIG.
3 includes call numbers A _{1 to} A ₄ , B _{1 for} each article A, B, ...
~ B ₄ , ..., first set value r ₁ , w ₁₁ ~ w ₃₁ , second set value
r ₂ , w _{12 to} w ₃₂ are registered. Here, specific numerical examples of these numbers and each set value are shown in parentheses in the same figure.

In this way, when the registration of the required setting values etc. is completed,
Next, for example, the weight selection work and the combination weighing work for the article A are performed. In that case, the individual items a ... A of the item A do not have a constant size (weight), and this is the sixth item.
As shown in FIG. 1A, initially, the large and small sizes are stored, and these are sorted according to weight rank, and then each rank sheet is combined and weighed with a predetermined weight.

This work is performed according to the flow chart of FIG.
The first working mode in step S ₁₁ to set the screening mode,
Then in step S ₁₂ , the first call number A for article A
Enter ₁ . By inputting the calling number A ₁ , the first and second set values r ₁ and r ₂ used for the weight selection work are called from the control device 2 and the RAM 13 to the CPU 11. Then, as the next step S _13, as shown in FIG. 6 (2), each weighing machine 5
_{1-5 10} supplies the articles a to one by one at random to.

At this time, the CPU11 at step S _14, first weighing value indicated by the input weight signal from the first weighing machine 5 ₁ and the RAM1
The first and second set values r ₁ and r ₂ called from 3 are compared, and when the measured value is less than the first set value r ₁ , that is, the article a supplied to the first weighing machine 5 ₁ is the third If it belongs to rank R ₃ , the indicator lamp 6 ₁ attached to the weighing machine 5 ₁ is attached in step S _15.
Is lit weakly, and when the weighing value is the first set value r ₁ or more, the second
When the value is less than the set value r ₂ , that is, when the article a belongs to the second rank R ₂ , the display lamp 6 ₁ is strongly turned on in step S ₁₆ , and the measured value is the second set value r ₂ or more. , That is, when the article a belongs to the first rank R ₁ , the step
The above indicator lamp 6 _{1 is made} to blink at S ₁₇ . Thereby, the operator the article a by lighting state of the display lamp 6 ₁
You can know the weight rank of. By repeatedly executing the operation in steps S ₁₄ to S ₁₇ through step S _18. For even article a ... a supplied respectively to the second to tenth weighing machine 5 _{2-5 10,} similarly, each weighing machine 5 ₂
The weight rank is displayed according to the lighting state of the indicator lamps 6 _{2 to} 6 ₁₀ attached to the ~ ₁₀ . Then, the operator, in step S _19, ten articles a ... a, which is supplied to each weighing machine 5 ₁ to 5 ₁₀ in accordance with the display, as shown in FIG. 6 (3), first rank R ₁ the article a ₁ ~a _1, the second rank R ₂ articles
and a ₂ ... a _2, while stocked to sorted into the third rank R ₃ and the article a ₃ ... a _3, step S ₁₃ through step S ₂₀
By repeating S ₁₉ to S ₁₉ , the total amount of the article A is sorted by weight rank.

When the sorting work is completed in this way, the next step
The working mode switched to the combination mode S _21, further inputs the second call number A ₂ of the article A in step S _22. The input of the call number A _2, the lower limit and the first set value w ₁₁ is a target weight combination weighing about article a ₁ ... a ₁ of the first rank R ₁ which is selected by the above screening operations, this value 2nd set value w which is the upper limit of the allowable error range
₁₂ and ₁₂ are called from RAM 13 to CPU 11.

Then, the operator, then in step S _23, as shown in FIG. 6 (4), one by one supplying the articles a ₁ ... a ₁ of the first rank R ₁ each metric 5 ₁ to 5 ₁₀ To do. At this time, the CPU 11 of the control device 2 performs a combination calculation of the weighing values respectively indicated by the weight signals from the weighing machines 5 _{1 to} 5 _{10 in} step S ₂₄ , and the total value is the second set value w ₁₂ (upper limit). Value) which is less than or equal to the first set value w ₁₁ (target weight) and is closest to this value (optimal combination), and at step S ₂₅ , the weighing corresponding to this optimal combination is calculated. The indicator lamps 6 ... 6 of the weighing machines 5 ... 5 for which the values have been obtained are turned on. Then, the operator, in step S _26, the display lamp 6 ... 6 are supplied to the weighing machine 5 ... 5 lit article
Take out only a ₁ ... a ₁ and gather them together. As a result, the articles a ₁ ... A ₁ of the first rank R ₁ have a predetermined target weight W ₁
Or it will be weighed close to this. Here, the total value is the first and second set values by the above combination calculation.
If a combination that is a value between w ₁₁ and w ₁₂ is not obtained,
The article supplied to any one or a plurality of weighing machines is replaced with another article, and then the combination calculation is performed again.

Then, the steps S ₂₃ to S ₂₆ through step S ₂₇
By repeatedly executing, the combination weighing is performed on all the articles a _{1 to} a ₁ belonging to the first rank R ₁ . In that case,
In second and subsequent combination weighing will be supplied the next article only for the weighing machine 5 ... 5 article a ₁ ... a ₁ is taken out corresponds to the optimum combination by a previous combination weighing.

Further, the combination weighing of all the articles a ₁ ... a ₁ of the first rank R ₁ is them completed, via step S ₂₈ step S
₂₂ is executed, and then the third calling number A ₃ for the second rank R ₂ is input, and steps S _{23 to} S ₂₇ are repeated, so that the second rank R 2 as shown in FIG. 6 (5). _The combination weighing is similarly performed on the _second articles a _{2 to} a _{2 and} , similarly, the combination weighing is performed on the third rank R ₃ articles a _{3 to} a ₃ as shown in FIG. 6 (6). . Then, in step S _28, the total rank R _1, R _2, if determined that the combination weighing about R ₃ is completed will be the total work on the article A is completed, each article a ... a weight ranks After being separately sorted, a product weighed to a predetermined weight can be obtained. Note that when the work for the articles B, C ... Is continuously performed, the above steps S _{11 to} S ₂₈ are repeated.

(Effects of the Invention) As described above, according to the weighing device of the present invention, a large number of articles of the same type having different weights are sorted according to a predetermined weight rank, and these articles have a predetermined target weight for each weight rank. By combining such products as described above, it is possible to obtain a product in which the weight as a whole is constant and the weight of each product is uniform. In particular, according to the present invention, since the weighing machine is commonly used for the above-described weight selection work and combination weighing work, a device having a simple and compact structure is realized as this kind of weighing device. Become.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is an overall perspective view of a weighing device, FIG. 2 is its control system diagram, FIG. 3 is a flowchart diagram showing data registration work, and FIG. 4 is this work. FIG. 5 is an explanatory view of the data registered by FIG. 5, FIG. 5 is a flow chart showing the weight sorting work and the combination weighing work,
FIGS. 6 (1) to 6 (6) are explanatory views showing each step of this work. 2 ... Weight rank determination means, combination calculation means (control device), 5 _{1 to} 5 ₁₀ ... Weighing machine, 7 ... Mode setting means (key input section).

Claims (1)

(57) [Claims] 1. A combination weighing apparatus according to weight rank, wherein a large number of articles of the same type having different weights are sorted by weight rank, and these articles are combined into a predetermined target weight for each weight rank to obtain a product of a predetermined weight. A plurality of weighing machines, a mode setting means for setting the work mode to either the sorting mode or the combination mode, and the sorting machine to determine the weight rank of each article supplied to each of the weighing machines by the weighing machine. A combination of weight rank determining means for determining based on the obtained weight value and an article having a predetermined target weight based on the weight values of the articles of the same weight rank supplied to the respective weighing machines in the combination mode. A combination weighing device according to weight rank, which comprises: