JP5996392B2 - Weighing device and weighing system - Google Patents

Description

  The present invention relates to a weighing device that measures the weight of an object to be weighed and a weighing system using the same, and more specifically, suitable for bagging such that the total weight of a plurality of objects to be weighed becomes a fixed amount. The present invention relates to a weighing device and a weighing system.

  2. Description of the Related Art Conventionally, in retail stores such as supermarkets, products such as agricultural products purchased by boxing are subdivided in order to sell them at the store, for example, a fixed amount of bagging work is performed such as how many kg in several pieces.

  In such a bagging operation, several items are taken out from a large number of items and placed on a single scale, and a combination of items to be quantified is selected. For example, the weight of the last item to be loaded is selected. Depending on the situation, it is not easy to determine the quantity, and based on experience and intuition, there are many cases in which weighing is repeated many times by replacing with other articles, and there is a problem that it takes a lot of labor for the weighing.

  For this reason, Patent Reference 1 discloses a combination weighing shelf as a combination weighing system for taking out an article having a constant weight. This combination weigher shelf has storage units arranged in a grid, and each storage unit is a storage detection sensor that detects that an object to be weighed is stored, and a selected storage unit. And a display unit for displaying whether or not.

  In use, first, the weight of the object to be weighed is weighed by the weighing unit. The weighed objects are temporarily stored in the storage units. The control unit performs combination calculation using the weight of the objects to be weighed stored in each storage unit, selects a combination of storage units whose total weight satisfies a predetermined condition, and displays the display unit of the selected storage unit To that effect. The operator can create a bag with a constant weight by collecting the objects to be weighed in the storage unit displayed and putting them in a bag.

Japanese Utility Model Publication No. 7-42487

  However, in the conventional configuration of Patent Document 1, since the objects to be weighed are stored one by one or one unit at a time in the storage unit, it is necessary to newly put the objects to be weighed in the storage unit every time the objects to be weighed are taken out. As described above, the worker must temporarily store the object to be weighed in the storage unit, take out the stored object to be weighed from the storage unit, and there is a problem that work efficiency is poor.

  Therefore, the applicant of the present invention has developed a technique that enables efficient quantitative measurement work without relying on experience or intuition, for example, Japanese Patent Application No. 2012-102511 “Measuring Device and Application” filed on April 27, 2012. It has already been proposed as a “measurement system” (hereinafter referred to as “prior application”).

  In an example of the embodiment disclosed in this prior application, in a quantitative bagging operation, a plurality of weight ranks whose weight ranges are known in advance, for example, weight ranks of “S”, “M”, and “L”, are covered. Prepare a container in which the weighing object is stored, place the weighing object on the scale so that it is smaller than the fixed quantity, and add the weighing object to be added to the weight rank and its weight in order to determine the quantity. The size is indicated by a size corresponding to the relative weight in the rank, for example, “large”, “medium”, and “small”. For example, when the weighing object to be added is designated as “medium” of the weight rank “S”, the operator determines that the size is “medium” from the weighing object of the container of the weight rank “S”. Is selected and placed on a balance, thereby determining a quantity.

  According to this prior application, in order to roughly place a weighing object that is smaller than the fixed amount and make it quantitative, the weight rank of the weighing object to be added, and the size corresponding to the relative weight in the weight rank, Therefore, the operator only has to select an object to be weighed from the corresponding container according to the instruction and place it on the balance. Work efficiency can be improved.

  However, in this prior application, in order to indicate an object to be added by the relative weight in the weight rank, for example, “large”, “medium”, and “small”, some operators indicate There is a possibility of selecting an object to be weighed having a size different from that of the object. That is, depending on the worker, “Large”, “Medium”. The determination of the “small” size may be smaller (lighter), and conversely, it may be larger (heavy). For this reason, for example, although “medium” is indicated. First, depending on the operator, “small” close to “medium” may be selected, and conversely, “large” close to “medium” may be selected.

  As described above, when an object to be weighed having a size different from the instruction is selected and placed on the scale, it is not fixed, and it is necessary to replace the object to be weighed. If this happens, work efficiency will decrease. It is desired to improve the reduction in work efficiency due to such worker characteristics.

  The present invention has been made in view of the above-described points, and an object thereof is to enable an efficient quantitative measurement operation without depending on experience or intuition.

  In order to achieve the above object, the present invention is configured as follows.

   (1) A weighing device according to the present invention is a weighing device that has a placing portion on which an object to be weighed is placed, and measures the weight of the object to be weighed placed on the placing portion. Rank information including a plurality of weight ranks of objects and weight ranges of each weight rank is stored in advance, and setting information including a target weight and a tolerance value obtained by totaling the weights of the plurality of objects to be weighed is set. And the weight of the weighing object placed on the placement unit based on the weight of the weighing object placed on the placement unit, the setting information, and the rank information. When the predetermined weight range defined by the weight and the allowable value has not been reached, the indicating means is controlled so that the objects to be weighed to be added to the placement unit are relative to each other in the weight rank and the weight rank. A control unit that indicates the relative weight rank corresponding to the weight, the control unit When an object to be weighed is added to the placement unit according to the instruction of the object to be added by the weight rank and the relative weight rank, the weight of the object to be weighed in the placement unit falls within the predetermined weight range. The number of times that the weight has not been reached is counted, and when the number of times counted exceeds a predetermined number, when the object to be added is indicated by the weight rank and the relative weight rank, the higher relative weight rank is designated. Change to instructions.

  In the rank information, in addition to the weight rank and the weight range of the weight rank, an item name of an object to be weighed may be included.

  The relative weight rank corresponding to the relative weight in the weight rank refers to the rank of the relative weight size in the weight range of the weight rank. For example, the weight is heavy when the weight range is divided into three. , Medium (ordinary), light three relative weight ranks, or when the weight range is divided into five, very heavy, heavy, medium (normal), light, very The five relative weight ranks that are light. In this case, the weight is proportional to the size so that it can be easily understood by the worker who performs the weighing operation. For example, the relative weight ranks such as “heavy”, “medium” (normal), and “light” are set to “large”, “ It is preferable to indicate the size as “medium” or “small”.

  The indication by the weight rank and the relative weight rank of the weighing object to be added to the above-mentioned placing part depends on which weight rank of the weighing object to be added belongs to which relative weight rank. It is preferable to indicate by the weight rank to which it belongs and the relative weight rank.

  The relative weight rank corresponds to the relative weight in the weight rank. For example, as described above, when the weight range of the weight rank is divided into three, “large”, “medium”, “ Three relative weight ranks of “small”. If you try to change the relative weight rank, for example, “Large” to a heavier rank, it will exceed the weight range of the weight rank, so in the next weight rank that is heavier than the weight rank and the weight rank. It will be changed to the relative weight rank. For example, when the relative weight rank “large” of the weight rank “S” is changed by one rank to the heavier one, the relative weight rank “small” of the weight rank “M” heavier than the weight rank “S” is obtained.

  The weighing device may be configured to include an instruction unit, or the instruction unit may be provided separately from the weighing device. In this case, the weighing device and the instruction unit are controlled so that the control unit of the weighing device can control the instruction unit. It is preferable to connect the means by wire or wirelessly.

  The instruction means only needs to be able to instruct the object to be added. For example, the instruction means may instruct by lighting the indicator lamp or displaying the display unit, may be instructed by voice, or may be instructed by combining them. May be.

  The predetermined number of times may be a fixed value, or may be a set value that can be set from a setting unit, for example.

  According to the weighing device of the present invention, when the operator places the object to be weighed on the placing portion with a small amount with respect to the target weight, the instruction means sets the weight within the predetermined weight range defined by the target weight and the allowable value. In addition, the weight rank of the object to be weighed is indicated, and the weight of the object to be weighed in that weight rank is relatively, for example, a relative weight rank such as “large”, “medium”, “small”, etc. Instructed at.

  As a result, the operator visually selects a target object having a specified relative weight from the objects having a specified weight rank, and adds the target object to the mounting unit to visually confirm the target weight range. What is necessary is just to complete the combination of a measurement thing and to pack this combination of a to-be-measured item.

  In this way, the weight rank of the object to be weighed and the relative weight rank in the weight rank are instructed so that the weights of the plurality of objects to be weighed are within the predetermined weight range. Place an object to be weighed that is smaller than the weight roughly on the placement unit, and select the object to be weighed with the designated relative weight, and place it on the placement unit. It's okay. Therefore, it is not necessary for the operator himself to determine the weight rank of the object to be added and the size of the object to be added, and it is easy to select the object to be added regardless of experience or intuition. A combination of objects to be weighed within a predetermined weight range can be completed, and work efficiency is improved.

  When the relative weight rank, for example, “relative weight rank” such as “large”, “medium”, and “small” is specified, the operator selects an object to be weighed lighter than the specified relative weight rank, and the predetermined weight The range may not be reached. In such a case, it is necessary to replace the object to be weighed, and if this replacement is repeated, the work efficiency is lowered.

  According to the weighing device of the present invention, the weight of the weighing object including the actually added weighing object is within the predetermined weight range even though the weighing object to be added is indicated by the weight rank and the relative weight rank. If the number of times of failure does not reach the specified number of times, i.e., if the addition of an object that is lighter than the specified relative weight rank is repeated, the worker shall make the relative weight lighter than the specified relative weight rank. Since there is a tendency to select weighing objects with a weight rank, when the weighing object to be added is designated with the relative weight rank, the relative weight rank is changed to the higher one, and the instruction is given. Even an operator who selects an object to be weighed with a lighter relative weight rank than the relative weight rank, selects and adds an object to be weighed to make a combination of objects to be weighed within the specified weight range. Can be loaded The number of the example is to improve the working efficiency is reduced.

  (2) In a preferred embodiment of the weighing apparatus of the present invention, the control unit adds the object to be weighed to the placement unit according to the instruction of the object to be added based on the weight rank and the relative weight rank. In this case, the number of times the weight of the object to be weighed on the mounting part exceeds the predetermined weight range is counted, and when the counted number exceeds the predetermined number, the object to be weighed is added to the weight rank and the weight When instructing by the relative weight rank, the relative weight rank is changed to the lighter rank.

  According to this embodiment, although the object to be weighed is indicated by the weight rank and the relative weight rank, the weight of the object to be weighed including the actually added object exceeds the predetermined weight range. When the number of times reaches a predetermined number, that is, when adding an object to be weighed that is heavier than the specified relative weight rank is repeated, the operator must make the relative weight heavier than the indicated relative weight rank. Since there is a tendency to select weighing objects with a weight rank, when the weighing object to be added is designated with the relative weight rank, the relative weight rank is changed to the lighter rank and the instruction is given. Even an operator who selects an object to be weighed with a relative weight rank that is heavier than the relative weight rank can add a weighing object to make a combination of objects to be weighed within a predetermined weight range. Number of re-loading Reduced working efficiency is improved.

  (3) In another embodiment of the weighing device according to the present invention, when there is one object to be weighed to be added and the control unit indicates the relative weight rank, the relative weight is changed. Change the rank by one and give instructions.

  When the control unit reaches a predetermined weight range by adding one of the weight ranks of the plurality of weight ranks to the weighing object placed on the placing unit. The one object to be added is indicated by its weight rank and relative weight rank by controlling the indicating means.

  The control unit can determine the weight of the object to be added based on the weight of the object to be weighed placed on the placing part and the target weight which is the lower limit value of the predetermined weight range. That is, the weight of the object to be weighed to be added can be obtained by subtracting the weight of the object to be weighed placed on the placing part from the target weight.

  In addition, based on the weight of the weighing object to be added, the plurality of weight ranks of the weighing object stored in advance, and the weight range of each weight rank, is it necessary to add only one weighing object to be added? Since it is possible to determine whether or not there is one object to be added, that one object can be indicated by its weight rank and relative weight rank.

  When there are two or more objects to be weighed, for example, the weight rank and the relative weight rank of each of the two or more objects to be weighed may be indicated or added. Until there is one object to be weighed, for example, it may be instructed to add the objects to be weighed with the heaviest weight rank one by one.

  According to this embodiment, the operator only needs to place an object to be weighed on the placing part that is smaller than the target weight, preferably not enough for one object to be weighed on the target weight. The weight rank of one object to be weighed is indicated, and the relative weight rank in the weight rank, for example, “large”, “medium”, “small” is indicated. A combination of objects to be weighed within a predetermined weight range can be completed simply by selecting and adding objects to be weighed.

  In addition, when adding a weight object that is lighter than the specified relative weight rank or adding a heavy object to be weighed repeatedly, indicate the object to be added with the relative weight rank. In addition, since the relative weight rank is changed to one of the heavier or lighter one, it is indicated whether the weight is lighter or heavier than the indicated relative weight rank. By adding one object to be weighed, a combination of objects to be weighed within a predetermined weight range can be obtained, and the number of times the objects to be weighed can be reduced, and work efficiency is improved.

  (4) In the embodiment of (3) above, the control unit controls the instruction means to add the object to be added to the weight of the object to be added by adding a predetermined weight. You may make it instruct | indicate with the said weight rank and the said relative weight rank based on weight.

  The predetermined weight to be added to the weight of the object to be weighed is within a weight range of an allowable value that defines the upper limit value of the predetermined weight range with the target weight as a lower limit value. For example, if the allowable value is 10 g, it is within 10 g. It is more preferable that the weight is about ½ of the weight width.

  The weight of one object to be weighed is added to the placing part so that the total weight of the objects placed on the placing part is the lower limit of the predetermined weight range. A target weight is obtained, and based on the obtained weight, an object to be added is indicated by a weight rank and a relative weight rank.

  That is, by adding one object to be weighed, the weight rank and relative weight rank of the object to be weighed to be added are instructed so that the target weight is the lower limit value of the predetermined weight range. Therefore, if an object to be weighed that is slightly lighter than the instructed object is selected and added, the target weight that is the lower limit of the predetermined weight range will not be reached. It is necessary to replace the objects, and work efficiency is reduced.

  According to this embodiment, the weight rank and relative weight rank of the object to be added are indicated based on the added weight obtained by adding a predetermined weight to the weight of one object to be added. When the object to be weighed is added, the weight is not the target weight which is the lower limit value of the predetermined weight range but the weight obtained by adding the predetermined weight to the target weight. Therefore, even if an object to be weighed lighter than the instructed object to be weighed is selected and added, it will be suppressed from falling below the target weight, which is the lower limit value of the predetermined weight range. It is possible to improve the work efficiency by reducing the number of times the weighing object is replaced.

  (5) In another embodiment of the present invention, the objects to be weighed in the plurality of weight ranks are stored in a plurality of containers for each weight rank, and the instruction means is individually provided in each of the plurality of containers. A plurality of display units arranged corresponding to each other, the display unit having a display unit for displaying the relative weight rank of the object to be weighed to be added, and the control unit controls the indicating unit. In addition, the display unit corresponding to the weight rank of the object to be added indicates the weight rank of the object to be added and the relative weight rank.

  The container may be any container that can hold an object to be weighed, and may be a box, a bag, a tray, a container, or the like.

  Since the objects to be weighed are stored in each of the plurality of weight ranks in each of the plurality of containers, for example, a container in which the objects to be weighed are packed in each weight rank may be used as a container. The packaged objects to be weighed may be transferred.

  According to this embodiment, the indicating means includes a plurality of display units arranged corresponding to the containers in which the objects to be weighed of the respective weight ranks are respectively stored. Accordingly, the weight rank of the object to be weighed can be indicated, and the display unit has a display unit for displaying the relative weight rank of the object to be weighed. The relative weight rank of the object to be weighed can be indicated.

  (6) The weighing system of the present invention includes the weighing device of the present invention and the instruction means connected to the weighing device.

  According to the weighing system of the present invention, the operator roughly places a small object to be weighed on the placing portion with respect to the predetermined weight range, and weighs the weight rank and the relative weight rank instructed by the instruction means. By simply selecting an object and placing it on the mounting part, a combination of objects to be weighed within a predetermined weight range can be completed, and weighing work can be performed efficiently without relying on experience or intuition. .

  In addition, for workers who tend to select an object to be weighed lighter than the specified relative weight rank, the relative weight rank is changed to a heavier one, so the work efficiency depends on the characteristics of the worker. Can be suppressed.

  As described above, according to the present invention, when the object to be weighed is placed on the placing unit with a small amount with respect to the predetermined weight range, the object to be weighed is added to the weight rank and the predetermined weight range. Since the relative weight rank is instructed, the operator visually selects the object to be weighed with the instructed weight rank and the relative weight rank, and adds it to the mounting portion, so that the object to be weighed has reached the predetermined weight range. The combination of is completed. Therefore, a combination of objects to be weighed that reaches a predetermined weight range can be easily completed without depending on the experience and intuition of the operator, and the work efficiency is improved.

  In addition, in the case where an object to be weighed that is lighter than the instruction is repeatedly added to the instruction to add an object to be weighed, the relative weight rank of the object to be weighed is increased. Since the direction is changed to the one of the ranks, the work efficiency can be improved by reducing the number of times the objects to be weighed are replaced.

1 is a block diagram of a weighing system according to an embodiment of the present invention. 1 is a perspective view of an electronic balance as a weighing device according to an embodiment of the present invention. It is the front view (a) of the display unit as an instruction | indication means concerning embodiment of this invention, a top view (b), and a side view (c). It is a perspective view which shows the attachment state of the display unit which concerns on embodiment of this invention. It is a perspective view which shows the use condition of the display unit which concerns on embodiment of this invention. It is a flowchart of the measurement process which concerns on embodiment of this invention. It is a flowchart of the measurement process which concerns on embodiment of this invention.

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

  FIG. 1 is a block diagram of a weighing system including a weighing device according to an embodiment of the present invention.

  The weighing system according to this embodiment is suitable for packaging items such as agricultural products and marine products into small portions in a predetermined amount.

  This weighing system includes an electronic balance 10 as a weighing device, and a plurality of, in this example, three display units 20a to 20c as instruction means for instructing an object to be weighed as described later.

  The electronic balance 10 includes a weighing unit 11 that weighs an object to be measured, a control unit 12 that performs arithmetic processing while controlling each unit, a storage unit 13 that stores rank information such as a weight rank, setting information, and the like, a target A setting input unit 14 for setting a weight, an allowable value, and the like, a display unit 15 for displaying a weighed weight value, a weight value up to a target value, an instruction for an operator, and the like, and a connector 19 are provided.

  The control unit 12 includes a calculation unit 16, an instruction control unit 17 that controls the display units 20 a to 20 c to indicate an object to be measured, and a display control unit 18 that controls the display unit 15. Each display unit 20a-20c is provided with lighting circuits 21a-21c and lamps 22a-22c.

  FIG. 2 is an external perspective view of the electronic balance 10 of this embodiment.

  The electronic balance 10 includes a main body case 30 and includes a weighing pan 31 as a placement portion on which an object to be weighed is placed. In the main body case 30, in addition to the control unit 12 and the storage unit 13 described above, a load sensor such as a load cell that is connected to the weighing pan 31 and outputs a load signal to the calculation unit 16 is incorporated. A setting input unit 14 including various operation buttons and a display unit 15 including a liquid crystal display are provided on the front surface of the main body case 30, and the weighing unit 11 is configured by a weighing pan 31 and a load cell.

  FIG. 3 shows the display units 20a to 20c. FIG. 3A is a front view, FIG. 3B is a plan view, and FIG. 3C is a side view.

  The display units 20a to 20c have the same configuration, and the display units 20a to 20c are representatively shown as the display unit 20 in FIG. 3 and FIG.

  As shown in FIG. 3, the display unit 20 includes a case 23, and a lighting circuit 21 and the like are built in the case 23, and the first LED 24, the second LED 25, and the third LED 26 are arranged on the front surface of the case 23. Three sets of lamps 22 are provided. Each of the LEDs 24, 25, and 26 is a red, blue, and green three-color LED. The lighting circuit 21 lights any one of the first LED 24, the second LED 25, and the third LED 26 in response to a lighting signal from the electronic balance 10. An attachment clip 27 is provided on the rear surface of the case 23.

  FIG. 4 is a perspective view showing an attached state of the display unit 20.

  The display unit 20 is attached to a box 40. The box 40 stores objects to be weighed in ranks, which will be described later. The display unit 20 is detachably attached to the upper end of an arbitrary wall surface of the box 40 so that the wall is sandwiched by the clip 27 from above. The display unit 20 is connected to the connector 19 of the electronic balance 10 via a signal line (not shown).

  Next, the weighing system of this embodiment will be described with a specific example.

  Here, the objects to be weighed and packed in the S, M, and L weight ranks, for example, the potato boxes of the S, M, and L weight ranks, are purchased and subdivided into a plurality. This is applied to the case of creating a fixed amount of potato bagging.

  The weight ranges of the weight ranks S, M, and L of the boxed potato are determined in advance, and the weight ranks S, M, and L and their weight ranges are set and stored in the electronic balance 10 as rank information described later. Stored in the unit 13. In this embodiment, the weight rank is defined so that the weight range between the lower limit weight value of the weight rank S and the upper limit weight value of the weight rank L is continuous by the three weight ranks S, M, and L. Further, in this embodiment, each weight range of each of the weight ranks S, M, and L is equally divided into three, depending on which of the three divided weight ranges the weight value of the object to be weighed belongs to. , “Large”, “Medium”, and “Small” relative weight ranks. For this reason, the number of sections of the weight range, three in this example, is set in the electronic balance 10.

  First, as preparation for the bagging operation, as shown in FIG. To transfer the potatoes of L, three boxes 40a, 40b, 40c are prepared for each weight rank, the boxed potatoes of weight rank S are transferred to the S box 40a, and the M box 40b is transferred. Moves the boxed potatoes of weight rank M, and transfers the boxed potatoes of weight rank L to the L box 40c.

  Display units 20a, 20b, and 20c are attached to the boxes 40a, 40b, and 40c, respectively. Each display unit 20a, 20b, 20c is connected to a predetermined port of the connector 19 of the electronic balance 10 via a signal line. The connector 19 has a sufficient number of ports to accommodate the number of ranks of various objects to be measured. Among these ports, S, M, and L potato ports are set, The display unit 20a is connected to the S port, the display unit 20b is connected to the M port, and the display unit 20c is connected to the L port.

  The first LEDs 24a, 24b, and 24c in the lamps 22a, 22b, and 22c of the display units 20a, 20b, and 20c have a relatively small weight (light weight) when the weight ranges of the ranks are divided into the three. ) Relative weight rank “Small” indicating that the second LEDs 25a, 25b, and 25c have a relatively medium weight relative weight rank “Medium”, and each of the third LEDs 26a, 26b, and 26c has a weight of It is negotiated with the operator in advance that the relative weight rank is “large” indicating that it is relatively large (heavy). That is, the S-sized potato contained in the box 40a is within a certain weight range, and among the potatoes within this weight range, the first LED 24a is determined to be small by the subjectivity of the operator, and the second LED 25a is moderate. What is to be determined is instructed to determine that the third LED 26a is large.

  Similarly, the first LED 24b, the second LED 25b, and the third LED 26b are determined as relative weight ranks “small”, “medium”, and “large” among the potatoes of the weight rank M in the box 40b, the first LED 24c, The 2LED 25c and the third LED 26c indicate which of the potatoes of the weight rank L in the box 40c are judged to have the relative weight ranks “small”, “medium”, and “large”, respectively.

  Next, the weighing operation will be described based on the flowchart of FIG.

  As a preparation, the target input and the allowable value are input as setting information by operating the setting input unit 14. A predetermined weight range is defined by the target weight and the allowable value. Specifically, the target weight is the lower limit value of the predetermined weight range, and a value obtained by adding an allowable value to the lower limit value is the upper limit value of the predetermined weight range. For example, if the target weight is 1000 g and the allowable value is 50 g, the predetermined weight range is 1000 g to 1050 g.

  In step S1 of FIG. 6, the worker has a weight less than the target weight, preferably about 90% of the object to be weighed, for example, if the target weight is 1000 g, about 900 g, for example, one M size potato. If the weight is around 100 g, about nine potatoes are placed on the weighing pan 31 in a bag, for example.

  In step S2, the upper and lower limits of whether or not the weight of about nine potatoes placed and weighed on the weighing pan 31 are within the upper and lower limits of the predetermined weight range are determined.

  If the weight of the weighing object placed on the weighing pan 31 is within the predetermined weight range based on the determination of the upper and lower limits, it is determined as “appropriate” and the weighing is completed (step S3). Bagging is complete.

  Further, when the weight of the object placed on the weighing pan 31 exceeds the upper limit value of the predetermined weight range by the upper / lower limit determination, it is determined as “overload” (step S5), and the process proceeds to step S12. For example, since an instruction for replacement is displayed on the display unit 15, the operator drops, for example, one potato placed immediately before from the weighing pan 31, and returns to step S <b> 1 to reweigh.

  Further, when the weight of the object placed on the weighing pan 31 is less than the lower limit value of the predetermined weight range by the upper / lower limit determination, it is determined as “light” (step S4), and the weight of the predetermined weight range is determined. Subtract the load weight, which is the weight of the object to be weighed, placed on the weighing pan 31 from the lower limit (target weight), and add the potato weight A (= lower limit-load) to obtain the predetermined weight range. Weight) is calculated (step S6), and the process proceeds to step S7.

  In step S7, whether or not the calculated weight A is within the maximum value of the maximum weight rank, that is, within the maximum value of the weight range of the heaviest weight rank L among the weight ranks S, M, and L of potatoes. Judging. That is, it is determined whether or not there is one remaining potato to be added in order to obtain the predetermined weight range. When it is not within the maximum value, that is, when the remaining number is not one, additional display for adding one potato is performed on the display unit 15, for example, and the worker adds one potato and returns to step S <b> 1. Reweigh. The weight rank of the potato to be added is not particularly limited, but it is preferable to add one potato having a weight rank L, for example. In addition, it may replace with the additional display by the display part 15, or you may instruct | indicate the potato to add using the display unit 20 similarly to the below-mentioned with the additional display by the display part 15. FIG.

  If it is within the maximum value in step S7, if one object to be weighed within the maximum value is added, the predetermined weight range can be reached, and the process proceeds to step S8.

  In step S8, it is determined whether or not a value obtained by adding an allowable value defining the upper limit value of the predetermined weight range to the calculated weight A is greater than the minimum value of the weight range of the lightest weight rank S. If it is not larger than the minimum value, it is assumed that even if one lightest potato is added, the upper limit of the predetermined weight range will be exceeded, the process proceeds to step S12. For example, a display instruction is displayed on the display unit 15. For example, the operator takes down one potato placed immediately before from the weighing pan 31 and returns to step S1 to reweigh.

  If it is larger than the minimum value in step S8, the process proceeds to step S9, and a weight obtained by adding a weight of 10% of the lower limit value of the lightest weight rank S to the weight A as a predetermined weight is added to the predetermined weight range. The weight of the potato to be added is determined, and the process proceeds to step S10.

  If the lower limit of the weight rank S is, for example, 50 g, 5 g, which is 10% of that, is added to the weight A, and the added weight (A + 5) g is potato to be added in order to be in the predetermined weight range. It becomes the weight of one piece.

  The reason why the weight obtained by adding the predetermined weight to the weight A, for example, (A + 5) g, is the weight of the potato to be added is as follows.

  The weight A is a value obtained by subtracting the load weight, which is the weight of the potato placed on the weighing pan 31, from the target weight, which is the lower limit value of the predetermined weight range, as in step S6 described above. Therefore, when one potato with a weight A is added, the lower limit of the predetermined weight range is reached. If the weight of one potato to be added is slightly less than the weight A, the lower limit of the predetermined weight range will not be reached, and the potato needs to be replaced, resulting in a reduction in work efficiency.

  Therefore, by setting the added weight obtained by adding the predetermined weight to the weight A as the weight of one potato to be added, even if the weight of one added potato is slightly lower than the added weight, the predetermined weight range is obtained. This is because there is no need to replace the potatoes and the work efficiency is improved.

  Next, in step S10, a weight rank and a relative weight rank are calculated based on the weight of the potato to be added calculated in step S9. That is, the weight of the potato to be added belongs to any one of the weight ranks S, M, and L, and the relative weight rank of “large”, “medium”, or “small” in the weight rank. Ask for.

  Next, in step S11, the process proceeds to the process shown in FIG. 7 to indicate the obtained weight rank and relative weight rank, and then returns to step S1 to proceed to the next weighing process.

  FIG. 7 is a flowchart showing details of the process of instructing the weight rank and the relative weight rank in step S11 of FIG.

  When the weight rank and relative weight rank of one potato to be added are found, in step S13, the lamp of the display unit 20 corresponding to the weight rank and relative weight is turned on to indicate the rank.

  For example, if the last potato to be added has a weight rank of “S” and falls within the weight range of “small”, that is, if the relative weight rank is “small”, For the lighting circuit 21a of the display unit 20a attached to the S box 40a, the first LED 24a instructing “small” is turned on, and all the other LEDs are kept in the off state.

  Similarly, the last one is “S” “Medium”, “S” “Large”, “M” “Small”, “M” “Medium”, “M” “Large”, “L” “Small”, In the case of “L”, “medium”, “L”, “large”, the second LED 25a, the third LED 26a, the first LED 24b, the second LED 25b, the third LED 26b, the first LED 24c, the second LED 25c, and the third LED 26c are turned on. In the example of FIG. 5, the first LED 24 c that designates “small” of the weight rank L is lit.

  In step S <b> 14, the worker takes out one potato corresponding to the lit lamp from the box 40 and adds it to the potato on the weighing pan 31. When the first LED 24a of the display unit 20a attached to the S box 40a is lit, one potato that the operator has determined that is subjectively small is taken out from the S box 40a and added. Similarly, when the second LED 25a and the third LED 26a are lit, the middle and large ones are taken out from the S box 40a and added, and when the first LED 24b, the second LED 25b and the third LED 26b are lit, When the first LED 24c, the second LED 25c, and the third LED 26c are turned on from the box 40b, the small, medium, and large ones are taken out from the L box 40c and added.

  Next, in step S15, it is determined whether the weight of the potato placed and weighed on the weighing pan 31 including one added potato is within the upper and lower limits of the predetermined weight range. In step S16, it is determined whether or not the amount is appropriate. If the amount is appropriate, the flow returns to the main flow of FIG. 6 to complete the weighing (step S17), and one bag is completed.

  If it is not an appropriate amount, it is determined whether or not it is lightweight (step S18). If it is light, 1 is added to the counter Tu that counts the number of times the weight has been reduced, and the count value is updated (step S19).

  Next, since it is lightweight, in step S20, for example, a display instruction is given on the display unit 15, and the operator drops one potato placed immediately before from the weighing pan 31.

  Next, in step S21, it is determined whether or not the count value of the counter Tu that counts the number of times the weight has been reduced is greater than a preset natural number a, and the counter Tu count value is greater than the set number a. If not, the process returns to step S13, and the weight rank and relative weight rank are instructed again with one potato lowered from the weighing pan 31. Although the setting number a can be set arbitrarily, for example, about several times is set.

  In step S21, when the count value of the counter Tu is larger than the set number a, it is determined that the object to be weighed lighter than the instructed rank is repeatedly placed, and the process proceeds to step S22, where the instructed rank is It is determined whether or not the maximum rank, that is, the weight rank “L” and the relative weight rank “large”, and if it is not the maximum rank, the indicated relative weight rank is changed by one to the heavier one. At the same time, the count value of the counter Tu that counts the number of times that the weight has been reduced and the counter To that counts the number of times that an excessive amount described later is reset to “0” (step S24), the process proceeds to step S13, and the relative weight rank is set. Instruct the heavier to the rank that has been changed by one rank.

  In step S22, when the instructed rank is the maximum rank, for example, the display unit 15 displays an error so as to drop all objects to be weighed currently on the weighing pan 31 (step S23). Returning to step S1 of the main flow, the operator starts weighing again from the beginning.

  If it is not light in step S18, it is determined that the amount is excessive, and the process proceeds to step S25, where 1 is added to the counter To that counts the number of times the amount is excessive, and the count value is updated.

  Next, since the amount is excessive, in step S26, the instruction for replacement is given on the display unit 15, and the operator drops one potato placed immediately before from the weighing pan 31.

  Next, in step S27, it is determined whether or not the count value of the counter To that counts the number of times of excess is greater than a preset natural number a, and the counter To is greater than the set number a. If not, the process returns to step S13, and the weight rank and relative weight rank are instructed again with one potato lowered from the weighing pan 31. Note that the number of times the weight is reduced and the number of times the amount is excessive are compared with the same set number a, but may be different set numbers.

  In step S27, when the count value of the counter To is larger than the set number a, it is determined that the object to be weighed heavier than the instructed rank is repeatedly placed, and the process proceeds to step S28, where the instructed rank is It is determined whether or not the minimum rank, that is, the weight rank “S” and the relative weight rank “small”. If not the minimum rank, the indicated relative weight rank is changed by one to the lighter one. At the same time, the count value of the counter Tu that counts the number of times of lightening and the counter To that counts the number of times of overloading is reset to “0” (step S30), the process proceeds to step S13, and the relative weight rank is reduced. The direction of the rank changed by one rank is instructed.

  In step S28, when the instructed rank is the minimum rank, an error is displayed on the display unit 15 so as to drop all objects to be weighed currently on the weighing pan 31, and step S1 of the main flow in FIG. Returning to, the operator starts weighing again from the beginning.

  According to the weighing system of this embodiment, since the last one potato necessary for the predetermined weight range is indicated by the weight rank and the relative weight rank, the operator can place the predetermined weight range on the weighing pan 31. It is only necessary to roughly place a smaller number of potatoes, select and place the designated potatoes, and can easily perform quantitative weighing work without relying on experience or intuition.

  In addition, despite the addition of potatoes according to the weight rank instruction, the selection of an object to be weighed lighter than the instructed rank is repeated beyond the preset number of times a. For workers who change the relative weight rank to one that is heavier and instruct, and on the other hand, repeatedly select objects that are heavier than the indicated rank. Since the relative weight rank is instructed by changing one rank to the lighter one, it is possible to increase the work efficiency by reducing the number of times that the potato needs to be replaced due to light weight or excessive amount.

  Furthermore, the last potato to be added is indicated by the weight rank and relative weight rank to which the added weight obtained by adding the predetermined weight to the weight belongs, so that it is suppressed from falling below the lower limit value of the predetermined weight range. The number of replacements is reduced and work efficiency is improved.

(Other embodiments)
Each of the lamps 24, 25, and 26 of the display unit 20 is composed of RGB three-color LEDs, and may emit several colors by combining RGB. When a lighting signal from the electronic balance 10 is input to the lighting circuit 21 of the lamp 22, the three-color LED is turned on so that the color agreed with the operator in advance is obtained according to the instruction. For example, an instruction to select a small potato from the box 40 shines a three-color LED in red (only R lights up), an instruction to select the middle in blue (only B lights up), and selects a larger one The instruction to do so shines yellow (R and G are lit).

  Further, instead of the display by the display unit 20, an audio unit for instructing with voices such as “L large” and “M small” may be used. In this case, it is not necessary to provide for each rank of the objects to be weighed, and it is sufficient to install one. The voice unit includes a voice circuit and a speaker. When a control signal is input from the control unit 12 of the electronic balance 10, the voice circuit uses the control signal to send a comment sentence, an electronic sound, or the like stored in advance to the speaker. Output from. Such an audio unit may also be used as the electronic balance 10. That is, a sound circuit and a speaker may be built in the electronic balance 10 of FIG. 2, and the volume may be adjusted with a knob.

  Further, a combination of a display unit and a sound unit may be used to instruct both display and sound.

  In the above-described embodiment, the object to be weighed is applied to potatoes. However, the object to be weighed may be any product as long as it is sold in small quantities such as agricultural products, seafood, bags, etc. There may be.

  Further, the weight rank is not limited to the above-described S, M, and L, but is arbitrary such as SS, S, M, L, and LL.

  In addition, the number of times that the weight or the amount is excessive in steps S19 and S25 in FIG. 7 may be accumulated for each worker, and the information may be transferred to a personal computer and returned to the worker.

  The present invention is useful, for example, as a quantitative measurement when a purchased agricultural product or the like is packed in a certain size for sale at a store in a retail store such as a supermarket.

10 Electronic scale (metering device)
DESCRIPTION OF SYMBOLS 11 Weighing part 12 Control part 13 Memory | storage part 14 Setting input part 15 Display part 16 Calculation part 17 Instruction control part 18 Display control part 19 Connector 20 Display unit (instruction means)
21 lighting circuit 22 lamp

Claims (6)

A weighing device having a placing portion on which an object to be weighed is placed and weighing the weight of the object to be placed on the placing portion;
Rank information including a plurality of weight ranks of the objects to be weighed and the weight ranges of the respective weight ranks,
A setting unit in which setting information including a target weight and an allowable value obtained by totaling the weights of the plurality of objects to be weighed is set;
Based on the weight of the weighing object placed on the placement unit, the setting information and the rank information, the weight of the weighing object placed on the placement unit is the target weight and the allowable value. The relative weight corresponding to the weight rank and the relative weight in the weight rank is determined by controlling the indicating means when the prescribed weight range is not reached, and adding the object to be weighed to the mounting portion. And a control unit that indicates by rank,
When the object to be weighed is added to the placement part according to the instruction of the object to be added by the weight rank and the relative weight rank, the weight of the object to be weighed in the placement part is Count the number of times that the predetermined weight range has not been reached, and when the counted number exceeds the predetermined number of times, the relative weight rank is indicated when an object to be added is indicated by the weight rank and the relative weight rank. Change to a heavier rank
A weighing device characterized by that. When the object to be weighed is added to the placement part according to the instruction of the object to be added by the weight rank and the relative weight rank, the weight of the object to be weighed in the placement part is Counting the number of times that the predetermined weight range has been exceeded, and when the counted number is equal to or greater than the predetermined number, when indicating the object to be added by the weight rank and the relative weight rank, the relative weight rank is set. Change to the lighter rank and give instructions.
The weighing device according to claim 1. There is one object to be weighed to be added,
When the control unit instructs to change the relative weight rank, the control unit instructs to change the relative weight rank by one rank,
The weighing device according to claim 1 or 2. The control unit controls the instruction means, and the weight rank and the relative weight of the object to be added are determined based on an added weight obtained by adding a predetermined weight to the weight of the object to be added. Indicate by rank,
The weighing device according to claim 3. The objects to be weighed in the plurality of weight ranks are respectively stored in a plurality of containers for each weight rank,
The instructing means includes a plurality of display units arranged individually corresponding to the plurality of containers, and the display unit includes a display unit that displays the relative weight rank of the objects to be weighed to be added. Have
The control unit controls the instruction means to instruct the weight rank of the object to be added by the display unit corresponding to the weight rank of the object to be added, and to set the relative weight rank. Instruct,
The weighing device according to any one of claims 1 to 4. The weighing device according to any one of claims 1 to 5, and the instruction means connected to the weighing device.
A weighing system characterized by that.

Images