JP6953074B2 - Weighing device - Google Patents

Description

The present invention relates to a weighing device that weighs an object to be weighed.

Patent Document 1 described later discloses an example of the above-mentioned measuring device. The weighing device described in Patent Document 1 has a function (upper and lower limit) of determining whether or not the weight of the measured object to be weighed is included in the range (allowable weight range) of two reference values (lower limit value and upper limit value). It has a discrimination function).

In the technique described in Patent Document 1, the weight of the object to be weighed is measured by operating a predetermined operation key while the object to be weighed is being weighed (the object to be weighed is placed on the weighing pan). Can be set as the lower limit. In addition, the upper limit value is automatically determined based on the lower limit value. In this way, since the upper limit value is automatically determined by determining the lower limit value, the allowable weight range can be set relatively easily.

Japanese Unexamined Patent Publication No. 2016-148532

However, in the technique described in Patent Document 1, when setting the allowable weight range, it is necessary to place an object to be weighed with an accurate weight (lower limit value) on the weighing pan, so that the work is complicated. There was room for improvement.

An object of the present invention is to provide a weighing device capable of easily setting an allowable weight range in order to solve the above problems.

In order to achieve the above object, the weighing device according to one aspect of the present invention can measure the weight of the mounting portion on which the object to be measured can be placed and the weight of the object to be measured mounted on the above-mentioned mounting portion. Weighing information including at least the weight when the measuring unit and the object to be weighed placed on the above-mentioned place are all removed is accumulated, and the allowable weight range of the object to be measured is determined based on the accumulated weighing information. It is provided with a function execution unit capable of determining and storing the allowable weight range and executing the allowable range setting function, and the function execution unit is provided by an operator on an object to be weighed placed on the above-mentioned storage unit. The weight of the object to be weighed is adjusted by adding an object to be weighed or removing a part of the object to be weighed placed on the above-mentioned place, and the weight of the object to be placed on the above-mentioned place is within the target range. Then, the series of operations of removing all the objects to be weighed is regarded as one weighing, and when the predetermined number of weighings is completed, the permissible range setting function can be automatically executed, and the permissible range setting function can be used. , The lower limit of the permissible weight range is set based on the smallest weight among the weights when all the objects to be weighed placed on the above-mentioned placement part included in the accumulated weighing information are removed, and the most. The upper limit of the allowable weight range is set based on the large weight.

According to the present invention, the allowable weight range can be easily set.

The perspective view which showed the overall structure of the measuring apparatus which concerns on one Embodiment of this invention. Similarly, a schematic side sectional view. Similarly, a block diagram showing a configuration related to control. The mode transition diagram which showed an example of the mode transition of a measuring apparatus. The block diagram which showed the item and the setting value which the scale setting mode has. A flowchart showing a procedure for setting a lower limit value, etc. using the upper / lower limit value simple setting function. The figure which showed an example of the measurement information. The figure which showed the state of weighing a plurality of times. A flowchart showing a procedure for calling a lower limit value or the like using the upper / lower limit value simple call function. The figure which showed the image which compares the measurement information. A flowchart showing the execution procedure of each function in the power-on clock amount mode. A flowchart showing a state of manual setting in the automatic setting function or the upper / lower limit discrimination function. A flowchart showing the state of manual setting in the rank selection function.

In the following, the front-back direction, the up-down direction, and the left-right direction are defined according to the arrows shown in the figure. In this specification, the term "predetermined key operation" is often used, but it refers to the operation of one operation button of various operation buttons included in the weighing device 1 or the combination of a plurality of operation buttons. Then, when operating one or a plurality of operation buttons, which one operation button is to be operated or which combination of operation buttons is to be operated depends on the function or mode to be executed. Each is preset so as to be different as appropriate.

First, the outline of the configuration of the measuring device 1 according to the embodiment of the present invention will be described with reference to FIGS. 1 and 2.

The weighing device 1 measures the weight of the object to be weighed. Here, the object to be weighed means various objects weighed by the weighing device 1, such as potatoes, onions, peaches, grapes, and carrots. These may be sold by measure in units of several pieces. The weighing device 1 mainly includes a main body 10 and a weighing pan 20.

The main body 10 is the main structure of the weighing device 1. The main body 10 mainly includes a housing 11, a dry battery 12, a load cell 13, an operation key group 14, a liquid crystal display 15, an LED display 16, and a control board 17.

The housing 11 is a member formed in a substantially box shape. The front surface of the housing 11 is formed so as to be inclined from the upper rear to the lower front.

The dry battery 12 serves as a power source for the measuring device 1. The dry battery 12 is arranged at the front portion in the housing 11.

The load cell 13 is a sensor that detects a load. The load cell 13 is arranged in the housing 11 from the front and rear halfway portion to the rear portion. The load cell 13 can detect the load by detecting the strain generated by applying the load.

The operation key group 14 is for performing an operation related to the weighing device 1. The operation key group 14 is arranged near the left end portion on the front surface of the housing 11. The operation key group 14 mainly includes a first operation key 14a, a second operation key 14b, a third operation key 14c, and a fourth operation key 14d.

The first operation key 14a is mainly used when turning on / off the power of the measuring device 1. When the first operation key 14a is pushed in, the power of the weighing device 1 is turned on. Further, when the first operation key 14a is continuously pushed (pressed and held) for a predetermined time while the power of the measuring device 1 is turned on, the power of the measuring device 1 is turned off.

The second operation key 14b is mainly used when switching the display of the liquid crystal display unit 15. Specifically, every time the second operation key 14b is pushed in while nothing is placed on the measuring plate 20, the information displayed on the liquid crystal display 15 (for example, various set values) is displayed. It can be switched in a predetermined order.
Further, the second operation key 14b is used when switching the items displayed on the liquid crystal display unit 15 in the "scale setting mode" described later.

The third operation key 14c is mainly used when performing tare. The state in which the tare is performed using the third operation key 14c will be described later.
Further, the third operation key 14c is used to increase the set value displayed on the liquid crystal display unit 15 in the "scale setting mode" described later.

The fourth operation key 14d is mainly used when resetting the zero point. The state in which the zero point reset is performed using the fourth operation key 14d will be described later.
Further, the fourth operation key 14d is used to reduce the set value displayed on the liquid crystal display unit 15 described later in the “scale setting mode” described later.

The liquid crystal display unit 15 displays various information related to the weighing device 1. The liquid crystal display unit 15 is arranged at substantially the center of the left and right sides of the front surface of the housing 11.

The LED display unit 16 displays whether or not the weight of the object to be weighed is included in a preset range. The LED display unit 16 is arranged at substantially the center of the left and right sides of the front surface of the housing 11 and below the front of the liquid crystal display unit 15. The LED display unit 16 can be lit in red, blue or yellow.

The control board 17 is for controlling various calculations, storage, and the like related to the measuring device 1. A storage unit 33a, a calculation unit 33b, and the like, which will be described later, are arranged on the control board 17. The control board 17 is arranged at the front portion in the housing 11 (immediately behind the front surface of the housing 11).

The measuring plate 20 is a member having a substantially rectangular plate shape. The weighing pan 20 has a wide upper surface and can hold an object to be weighed placed on the upper surface. The weighing pan 20 is arranged above the main body 10. The substantially central portion of the lower surface of the weighing pan 20 is fixed and supported by the load cell 13. As a result, the load of the object to be weighed placed on the weighing pan 20 is applied to the load cell 13.

Next, the configuration related to the control of the weighing device 1 will be described with reference to FIG.

The weighing device 1 includes a control unit 33, a load cell 13, an amplifier circuit 31, an A / D converter 32, an operation key group 14, a liquid crystal display unit 15, and an LED display unit 16 as a control-related configuration.

The control unit 33 controls the weighing device 1. The control unit 33 mainly includes a storage unit 33a and a calculation unit 33b.

The storage unit 33a stores various information. The storage unit 33a is composed of a RAM, a ROM, and the like. The storage unit 33a stores in advance a program or the like related to the control of the measuring device 1. Further, the storage unit 33a can store new information regarding the control of the measuring device 1.

The calculation unit 33b performs various calculations. The calculation unit 33b is composed of a CPU and the like. The calculation unit 33b controls the measuring device 1 by executing the program stored in the storage unit 33a.

The amplifier circuit 31 amplifies the analog signal received from the load cell 13. The amplifier circuit 31 transmits the amplified analog signal to the A / D converter 32 described later.

The A / D converter 32 converts the analog signal received from the amplifier circuit 31 into a digital signal. The A / D converter 32 transmits the converted digital signal to the control unit 33 (calculation unit 33b).

Further, the operation signal from the operation key group 14 is transmitted to the control unit 33 (calculation unit 33b). The control unit 33 controls the weighing device 1 based on the operation signal.

Further, the control unit 33 (calculation unit 33b) can display predetermined information on the liquid crystal display unit 15 by transmitting a display signal to the liquid crystal display unit 15.

Further, the control unit 33 (calculation unit 33b) can turn on the LED display unit 16 in red, blue or yellow by transmitting a display signal to the LED display unit 16.

Next, the five states (modes) of the weighing device 1 configured as described above, specifically, "power-on clock amount mode", "product number selection mode", "discrimination weighing mode", and "product setting mode". And "scale setting mode" will be described.

FIG. 4 is a mode transition diagram showing an example of the mode transition of the measuring device 1. The control unit 33 of the weighing device 1 executes the "power-on clock amount mode" when the power is first turned on (arrow (1) in the figure). In the "power-on clock amount mode" that is executed when the power is turned on for the first time, the "normal weighing function" described later is executed, and other functions ("upper / lower limit value determination function", etc.) are not executed. The control unit 33 continues the state of this "power-on clock amount mode" until the power is turned off unless a switching operation to another mode is performed.

When the "scale setting mode" described later is switched to the "power-on clock amount mode" (arrows (11) and (1) in the figure), functions other than the "normal weighing function" are executed. In some cases. For example, in the "scale setting mode", the "automatic setting function" may be being executed as described later. In this case, when a predetermined key operation is performed (arrow (2) in the figure), the control unit 33 switches the state from the "power-on clock amount mode" to the "discrimination measurement mode". The "discrimination measurement mode" has a function of sorting the objects to be measured according to the weight by executing the "upper / lower limit discrimination function", the "rank selection function", etc., which will be described later.

When the switching operation to the "product number selection mode" is performed in the "power-on clock amount mode" (arrow (3) in the figure), the control unit 33 changes from the "power-on clock amount mode" to the "product number selection mode". Switch the state to "number selection mode". The "type number selection mode" has a function for calling a set value according to the type of the object to be measured and the like.

When the operation of selecting the product type (product number) of the object to be measured is performed in the "product number selection mode" (arrow (4) in the figure), the control unit 33 changes from the "product number selection mode" to "product number selection mode". Switch the state to "discrimination weighing mode". When the switching operation to the "product number selection mode" is performed in the "discrimination measurement mode" (arrow (5) in the figure), the control unit 33 changes from the "discrimination measurement mode" to the "product number selection mode". Switch the state to.

When the switching operation to the "product number setting mode" is performed in the "product number selection mode" (arrow (6) in the figure), the control unit 33 changes from the "product number selection mode" to the "product number setting mode". And switch the state. The "product type setting mode" has a function for manually changing the setting value stored for each product type (for each table described later).

When the manual setting of the set value for each product type is completed in the "product product setting mode" (arrow (7) in the figure), the control unit 33 switches the state from the "product product setting mode" to the "discrimination weighing mode". ..

When the switching operation to the "power-on clock amount mode" is performed in the "discrimination measurement mode" (arrow (8) in the figure), the control unit 33 changes from the "discrimination measurement mode" to the "power-on clock amount mode". And switch the state. When the "discrimination measurement mode" is switched to the "power-on clock amount mode", the "normal measurement function" described later is executed, and other functions ("upper / lower limit value discrimination function", etc.) are not executed.

When the switching operation to the "scale setting mode" is performed in the "power-on clock amount mode" or the "discrimination measurement mode" (arrows (9) or (10) in the figure), the control unit 33 sets the "scale setting mode". Switch the state to. The "scale setting mode" is a mode for changing the weighing device 1 to a state in which a predetermined function can be executed, or changing various settings. In the "scale setting mode", when the setting value described later is appropriately changed and a predetermined operation is performed (arrow (11) in the figure), the control unit 33 restarts the weighing device 1 and "turns on the power". The state is switched to "clock amount mode" (arrows (11) and (1) in the figure).

Unless the power is turned off, the control unit 33 is in the running mode, that is, "power-on clock amount mode", "type number selection mode", "discrimination measurement mode", "type setting mode", "scale setting mode". To continue one of the modes. On the other hand, when the power is turned off, the running mode is terminated, such as when the power supply to the control unit 33 is terminated.

Hereinafter, the "scale setting mode" will be described. When a predetermined operation is performed using the operation key group 14 in the "power-on clock amount mode" or the "discrimination measurement mode" (for example, the third operation key 14c and the fourth operation key 14d are pressed at the same time). , The control unit 33 switches the state of the weighing device 1 to the “scale setting mode” (arrows (9) and (10) in FIG. 4).

As shown in FIG. 5, in the "scale setting mode", mainly "selection of function" (item 01), "setting related to buzzer" (item 02), "setting related to lamp" (item 03), etc. are selected. Can be executed. It should be noted that the above items 01 to 03 are shown as an example, and it is assumed that the "scale setting mode" also has other items. In the following, after explaining the selection method of each item (items 01 to 03) in the "scale setting mode" with reference to FIGS. 3 and 5, the details of each item (items 01 to 03) will be described respectively. explain.

When the control unit 33 is switched to the "scale setting mode", the control unit 33 first displays a display indicating item 01 (for example, the number "01") on the left side portion of the liquid crystal display unit 15. When the operator presses the second operation key 14b in this state, the control unit 33 causes the liquid crystal display unit 15 to display a display (for example, the number "02") indicating the next item (that is, item 02).

Similarly, each time the operator presses the second operation key 14b to perform an operation, the control unit 33 causes the liquid crystal display unit 15 to display the display indicating the next item in order.

When the display indicating the last item of the weighing device 1 is displayed on the liquid crystal display unit 15 and the second operation key 14b is further pushed in, the control unit 33 again displays the display indicating the item 01 on the liquid crystal display. It is displayed on the unit 15.

In this way, the operator can repeatedly press the second operation key 14b to select a desired item from each item and display it on the left side portion of the liquid crystal display unit 15.

Further, when the display indicating each item is displayed on the left side portion of the liquid crystal display unit 15, the set value for the item is displayed on the right side portion of the liquid crystal display unit 15. Here, the set value is a value indicating the setting content of each item. Details of the set values for each item will be described later.

When the operator pushes in the third operation key 14c, the control unit 33 increases the set value displayed on the liquid crystal display unit 15. Further, when the operator pushes in the fourth operation key 14d, the control unit 33 reduces the set value displayed on the liquid crystal display unit 15. In this way, the operator can change the set value to a desired value by repeatedly pressing the third operation key 14c or the fourth operation key 14d.

In this way, the operator can select a desired item and change the set value of the item to a desired value. Further, when a predetermined determination operation is performed using the operation key group 14 after changing the set value, the control unit 33 stores the set value of the item. The determination operation includes, for example, a pressing operation of the second operation key 14b. When the determination operation is performed, the set value is stored and the items are sent to the next. At this time, when a predetermined function is assigned to the set value, the control unit 33 changes the weighing device 1 to a state in which the function can be executed. After that, the control unit 33 restarts the weighing device 1.

Next, the details of each item (items 01 to 03) will be described.

"Selection of function" (item 01) is an item for selecting a function possessed by the weighing device 1 and making the function executable. Functions of the weighing device 1 are assigned to the set values of item 01. Specifically, the set value 000 has a "normal weighing function", the set value 001 has an "upper / lower limit discrimination function", the set value 002 has a "rank selection function", and the set value 003 has an "automatic setting function". Each is assigned. It should be noted that the above setting values 000 to 003 are shown as an example, and it is assumed that other functions are assigned to the other setting values.

The "normal weighing function" (set value 000) is simply a function of weighing the object to be weighed. Details will be described later.

The "upper / lower limit discrimination function" (set value 001) determines whether or not the weight of the object to be weighed is included in a preset range (allowable weight range) (specifically, the lower limit value LL and the upper limit value UL). It is a function to display (whether or not the value is between) on the LED display unit 16.

Specifically, in the "discrimination weighing mode", when the object to be weighed is placed on the weighing pan 20 while the "upper / lower limit discrimination function" is executed, the control unit 33 calculates the weight of the object to be weighed. do. Specifically, when the object to be measured is placed on the measuring plate 20, the load applied to the measuring plate 20 is detected by the load cell 13. The analog signal from the load cell 13 is amplified by the amplifier circuit 31 and then converted into a digital signal by the A / D converter 32. The converted digital signal is transmitted to the calculation unit 33b of the control unit 33. The calculation unit 33b can calculate the load applied to the load cell 13 (and thus the weight of the object to be weighed placed on the measuring plate 20) from the received digital signal according to the program stored in the storage unit 33a. ..

When the weight of the object to be weighed is less than the lower limit value LL, the control unit 33 lights the LED display unit 16 in red. When the weight of the object to be weighed is larger than the upper limit value UL, the control unit 33 lights the LED display unit 16 in yellow. When the weight of the object to be weighed is equal to or greater than the lower limit value LL and equal to or less than the upper limit value UL (included in the allowable weight range), the control unit 33 lights the LED display unit 16 in blue. By checking the color of the LED display unit 16, the operator determines whether the weight of the object to be weighed is light (less than the lower limit LL), excessive (greater than the upper limit UL), or an appropriate amount (lower limit). Whether it is LL or more and the upper limit value UL or less) can be easily determined.

Here, the lower limit value LL and the upper limit value UL can be set in advance by the operator. Details of the method for setting the lower limit value LL and the upper limit value UL will be described later.

The "rank selection function" (set value 002) is a function for displaying on the liquid crystal display unit 15 which rank the weight of the object to be weighed is included in among a plurality of preset ranks (weight range). be.

The "automatic setting function" (setting value 003) is a function that can easily (automatically) set or call the lower limit value LL and the upper limit value UL (that is, the allowable weight range). The "automatic setting function" can be functionally further divided into three functions, that is, "upper / lower limit value easy setting function", "upper / lower limit value easy call function", and "upper / lower limit determination function". The "upper / lower limit determination function" in the "automatic setting function" is the same function as the "upper / lower limit determination function" assigned as the set value 001. Hereinafter, the "upper / lower limit value simple setting function" and the "upper / lower limit value easy call function" will be described.

The "upper / lower limit value simple setting function" is a function that can easily set the lower limit value LL and the upper limit value UL (that is, the allowable weight range). Hereinafter, the procedure for setting the lower limit value LL and the upper limit value UL by using the “upper / lower limit value simple setting function” will be specifically described with reference to FIGS. 6 to 8. For convenience of explanation, the scale is set to 10 (g) in the example shown in FIG.

When the "upper / lower limit value simple setting function" is executed in the "discrimination weighing mode", the control unit 33 receives information on the object to be measured placed on the weighing pan 20 (hereinafter, simply referred to as "weighing information"). Accumulation (memory) is started (step S111 in FIG. 6). The measurement information is information for identifying the type of the object to be measured. As shown in FIG. 7, the control unit 33 according to the present embodiment has, as measurement information, "weight initially loaded", "weight difference added or removed in the middle", "weight removed last", and "work". Accumulates "speed", "time / day of the week", "vibration information when mounted", and "tare amount". In order to store (store) the measurement information, the control unit 33 sequentially stores, for example, each time the measurement value stabilizes.

As shown in FIGS. 8 (a) and 8 (d), the “first weight placed” means that an object to be weighed is placed on the measuring plate 20 from a state in which nothing is placed on the measuring plate 20. It is the weight of the object to be weighed when it is placed. For example, when the stable values are sequentially accumulated, the control unit 33 acquires the stable value immediately after the stable value "0" is obtained as the "first weight". For example, in the example (first weighing) shown in FIG. 8 (a), the "first weight" is 350 (g).

“Weight difference added or removed in the middle” means that the object to be weighed (for example, see FIG. 8A) first placed on the weighing pan 20 is completely removed after the weighing is completed (for example, FIG. 8 (c)) The weight partially added or removed. For example, when the control unit 33 sequentially accumulates stable values, the difference between the stable value that is not "0" and the stable value that is not "0" immediately after that is set as "weight difference added or removed in the middle". get.

For example, in the example shown in FIG. 8 (b) (first weighing), the "weight difference added or removed in the middle" means 60 (g) (added weight difference) or 80 (g) (removed). Weight difference). When the objects to be weighed are added (or removed) one by one, the "weight difference added or removed in the middle" means the weight of one object to be weighed.

The "last removed weight" is the weight when all the objects to be weighed placed on the weighing pan 20 are removed (immediately before) after the weighing is completed. For example, when the control unit 33 sequentially accumulates stable values, when a stable value "0" is obtained immediately after a stable value other than "0", the stable value obtained immediately before the stable value "0" is obtained. Get the value as "last removed weight".

For example, in the example (first weighing) shown in FIG. 8 (c), the "last removed weight" is 330 (g). In addition, since the worker usually measures the weight of the object to be weighed so as to be within a predetermined range (target range), the "last removed weight" is a value within the target range. I can think.

The "working speed" is the number of times the object to be weighed is measured within a predetermined time. In this embodiment, it means the number of times of weighing performed in one minute. For example, if the control unit 33 acquires the time from when the stable value is "0" to when the stable value becomes "0" again as the time required for one measurement, the number of times of measurement required for one minute. Can be obtained. Since the "working speed" varies, an average value is calculated and accumulated for convenience. For example, in the example shown in FIG. 7, the "working speed" is about 5 times / minute.

The "working time / day of the week" is the time and day of the week when a series of weighing operations (for example, weighing operations performed from the time the power is turned on to the time the power is turned off) are performed. .. For example, in the example shown in FIG. 7, the “working time / day of the week” is from 9:05 to 10:00 and is Friday.

"Vibration information when placed" is information on vibration generated in the measuring plate 20 when the object to be measured is placed on the measuring plate 20. In the present embodiment, the amplitude of the measuring pan 20 is stored as information regarding vibration. The vibration of the measuring pan 20 can be detected via an A / D converter 32, a vibration sensor (not shown), or the like. Since the "vibration information when mounted" varies, an average value is calculated and accumulated for convenience. For example, in the example shown in FIG. 7, the amplitude of the "vibration information when mounted" is about 1.5 (mm).

The "tare amount" is a value of the weight (container weight) deducted by the tare that will be described later. For example, in the example shown in FIG. 7, the “tare amount” is 0 (g). That is, in the example shown in FIG. 7, tare is not performed.

When the control unit 33 starts accumulating the above-mentioned weighing information (“weight initially loaded”, etc.), the control unit 33 accumulates the weighing information each time the object to be weighed is weighed. The operator places the object to be weighed on the weighing pan 20 on which nothing is placed (see, for example, FIG. 8A), and adjusts the weight by adding or removing a part of the object to be weighed. Then, when the weight of the object to be weighed placed on the weighing pan 20 reaches a value within the target range, all the objects to be weighed are removed (see, for example, FIG. 8C). ), The series of operations is regarded as one weighing, and the weighing is repeated as many times as desired. FIG. 8 shows how the object to be weighed is weighed four times.

When the measurement is performed for the first predetermined number of times N1, the control unit 33 sets the lower limit value LL and the upper limit value UL (that is, the allowable weight range) based on the measurement information accumulated up to that point (FIG. 6). Step S112). For example, when the first predetermined number of times N1 is set to 4 times in advance, when the measurement of 4 times is completed as shown in FIG. 8, the control unit 33 controls the lower limit value LL based on the measurement information accumulated up to that point. Etc. are set.

Specifically, the control unit 33 determines that the weight of the object to be weighed is 350 (g) from the weighing information of the first weighing (particularly, "the weight loaded first" and "the weight removed last"). It can be recognized that it is out of the target range and within the target range if it is 330 (g).

Similarly, the control unit 33 recognizes from the measurement information of the second measurement that the weight of the object to be weighed is 310 (g), which is outside the target range, and 320 (g), which is within the target range. be able to. Further, the control unit 33 can recognize that the weight of the object to be weighed is 330 (g) within the target range from the measurement information of the third measurement. Further, the control unit 33 can recognize from the measurement information of the fourth measurement that the weight of the object to be measured is outside the target range when it is 340 (g) and within the target range when it is 330 (g). can.

From the measurement information in the above four times of measurement, it is estimated that the range (target range) targeted by the worker is 320 to 330 (g). Therefore, the control unit 33 sets 320 (g) as the lower limit value LL and 330 (g) as the upper limit value UL. In this embodiment, since the value of the "last removed weight" is set as the lower limit value LL and the upper limit value UL, the value of the "last removed weight" in FIG. 7 is the lower limit value LL. And the upper limit UL (ie, the allowable weight range).

Further, the control unit 33 stores the measurement information obtained by the measurement of the first predetermined number of times N1 as a table as shown in FIG. 7 (step S113 in FIG. 6). The control unit 33 stores and stores the measurement information as a different table each time the "upper / lower limit value simple setting function" is executed. These measurement information are given different names (such as "measurement data No. 1" shown in FIG. 7) so that they can be distinguished from each other. In this case, for example, regardless of the type of product, each time the measurement is performed, the measurement information obtained by the measurement is stored in different tables, or one table is fixed for each type and the same type is used. Is conceivable in which each time the measurement information is obtained by measurement, the measurement information is sequentially updated in the same table.

By storing the weighing information in different tables each time the "upper / lower limit value simple setting function" is executed in this way, it is possible to accumulate a plurality of weighing information for objects to be weighed with different types. The control unit 33 stores the measurement information in a non-volatile memory such as EEPROM. Therefore, even after the power of the weighing device 1 is turned off, the weighing information is not erased.

The weighing information for each product type may be stored not only as a table different for each product type but also in the same table so that the corresponding measurement information can be searched using the product type information as a search key.

By using the upper / lower limit value simple setting function in this way, the operator does not have to operate the weighing device 1 by himself / herself to input a specific numerical value, and simply weighs the object to be weighed several times. The lower limit value LL and the upper limit value UL (allowable weight range) can be easily set only by doing so.

Further, the "upper / lower limit value easy calling function" is a function that can easily call a suitable lower limit value LL or the like from the lower limit value LL and the upper limit value UL (allowable weight range) stored in advance. Hereinafter, with reference to FIGS. 9 and 10, a procedure for calling the lower limit value LL and the upper limit value UL by using the “upper / lower limit value simple call function” will be specifically described.

When the "upper / lower limit value simple call function" is executed in the "discrimination weighing mode", the control unit 33 starts accumulating (memorizing) information (weighing information) regarding the object to be weighed placed on the weighing pan 20. (Step S121 in FIG. 9). As the measurement information used in the "upper / lower limit value simple call function", for example, the same type of information as the measurement information used in the "upper / lower limit value easy setting function" can be considered. As shown in FIG. 10, the control unit 33 accumulates "the weight initially loaded" and the like as "weighing information of the current weighing". When the control unit 33 starts accumulating the measurement information, the control unit 33 accumulates the measurement information every time the object to be measured is weighed.

When the control unit 33 weighs N2 a second predetermined number of times, the control unit 33 adds the weighing information of the object to be weighed this time and a plurality of weighings accumulated in the past based on the weighing information accumulated up to that point. The degree of approximation of the information (for example, the measurement information of the measurement data No. 1 in FIG. 7, the measurement information of the measurement data No. 2, ...) Is determined (step S122 in FIG. 9). Specifically, as shown in FIG. 10, the control unit 33 compares each item of the measurement information of the object to be weighed this time and the measurement information accumulated in the past. Then, the control unit 33 calculates the degree of approximation indicating the degree of approximation between the measurement information of the object to be weighed this time and the measurement information accumulated in the past, based on an appropriate determination criterion.

The degree of approximation can be calculated by any method (judgment standard). For example, among each item of the measurement information, it can be calculated according to the number of items having the same value. It is also possible to set a weighted score for each item (a score that becomes higher for more important items) and calculate based on the total score of the items whose values match. In this way, the degree of approximation may be such that it can be determined whether or not the object to be weighed this time is similar to the object to be weighed according to the measurement information accumulated in the past.

When the control unit 33 calculates the degree of approximation, the control unit 33 selects and calls the past measurement information whose degree of approximation is equal to or higher than a predetermined threshold value and has the highest degree of approximation (step S123 in FIG. 9). In addition, "calling" means setting the value of the lower limit value LL and the upper limit value UL stored in the measurement information.

As described above, it is presumed that the measurement information having a high degree of approximation among the plurality of past measurement information is the same as the object to be measured this time. Therefore, the control unit 33 calls the measurement information having a high degree of approximation, and sets the lower limit value LL and the upper limit value UL based on the measurement information. When the degree of approximation is less than a predetermined threshold value, the control unit 33 determines that there is no past measurement information that is the same as the object to be weighed this time, and the control unit 33 determines that the measurement information is the same as the object to be measured this time. Do not make a call.

In this way, by using the upper / lower limit value simple calling function, it is possible to set an appropriate lower limit value LL and upper limit value UL (allowable weight range) according to the characteristics of the item and the operator who handles the item. Therefore, the operator does not operate the weighing device 1 by himself / herself to check the accumulated weighing information, but simply weighs the object to be weighed several times, and the lower limit value LL and the upper limit value UL. (Allowable weight range) can be easily set.

Further, in the upper / lower limit value simple call function, since the lower limit value LL or the like that approximates the measurement information accumulated in the past is set, the lower limit value LL or the like can be set in a relatively short time (small number of measurements). Therefore, in the present embodiment, the second predetermined number of times N2 in the upper / lower limit value simple call function is set to be smaller than the first predetermined number of times N1 in the upper / lower limit value simple setting function.

As described above, in the item 01 (“selection of function”) shown in FIG. 5, different functions are assigned to the above-mentioned set values 000 to 003 and other set values.

The "buzzer-related setting" (item 02) is an item for setting the on / off switching of the buzzer when executing each function of the weighing device 1, the timing of sounding the buzzer, and the like. The operator can make settings such as switching the buzzer on / off by appropriately operating the operation key group 14 in a state where the display indicating the item 02 is displayed on the liquid crystal display unit 15.

The “lamp-related setting” (item 03) is an item for changing the brightness of the lamp (LED display unit 16) of the weighing device 1. The operator can set the brightness of the LED display unit 16 by appropriately operating the operation key group 14 in a state where the display indicating the item 03 is displayed on the liquid crystal display unit 15.

Next, the "normal weighing function" will be described. As described above, the "normal weighing function" is simply a function for weighing the object to be weighed.

When the "normal weighing function" is executed, when the object to be measured is placed on the measuring dish 20, the control unit 33 (calculation unit 33b) calculates the weight of the object to be measured. The calculation unit 33b causes the liquid crystal display unit 15 to display the calculated weight of the object to be measured. The operator can confirm the weight of the object to be weighed by looking at the display on the liquid crystal display unit 15.

In the "normal weighing function", "upper / lower limit discrimination function", "rank sorting function", and "automatic setting function", tare can be performed using the third operation key 14c.

When the third operation key 14c is pushed in while the container (tare) of the object to be weighed is placed on the weighing pan 20, the control unit 33 displays the weight displayed on the liquid crystal display 15 in that state (the above). The weight calculation result is adjusted so that the weight of the container) becomes 0. When the object to be weighed in the container is weighed together with the container in this state, the weight of only the object to be weighed is obtained by subtracting the weight of the container. This allows the net weight of the object to be weighed in the container to be easily weighed.

Further, in the "normal weighing function", "upper / lower limit determination function", "rank selection function", and "automatic setting function", the zero point can be reset by using the fourth operation key 14d.

When the fourth operation key 14d is pushed in while the object to be measured is not placed on the measuring plate 20, the weight of the object to be measured displayed on the liquid crystal display 15 in the control unit 33 becomes 0 in that state. As described above, the weight calculation result is adjusted. Therefore, by pressing the fourth operation key 14d while the object to be measured is not placed on the measuring plate 20, the liquid crystal display unit at the zero point (the liquid crystal display unit when the object to be measured is not placed on the measuring plate 20). The deviation of (15 display) can be corrected, and accurate weighing can be performed.

Next, the "power-on clock amount mode" of the weighing device 1 will be described. The "power-on clock amount mode" is a state (mode) that is first executed when the weighing device 1 is turned on (including when it is restarted), and is usually a "normal weighing function". Is the mode to execute. Hereinafter, the contents of the “power-on clock amount mode” will be specifically described with reference to FIG. However, as can be seen from the arrow (2) in FIG. 4, it is possible to switch to the discriminant measurement mode by performing a predetermined key operation while the power-on clock amount mode is being executed.

When the power of the measuring device 1 is turned on, the state of the measuring device 1 is switched to the "power-on clock amount mode" by the control unit 33. In the "power-on clock amount mode", the function currently being executed is first confirmed (step S131 in FIG. 11), and the transition to the step corresponding to the function is performed.

Specifically, when the control unit 33 determines in step S131 that any of the "normal weighing function", "upper / lower limit determination function", and "rank selection function" is currently selected (executed). , Step S132. It should be noted that not only when the "normal weighing function" (set value 000) is selected in the "scale setting mode" and the weighing device 1 is restarted, but also when the power of the weighing device 1 is turned on for the first time, "normal" It is assumed that the "weighing function" is being executed.

When the control unit 33 shifts to step S132, the control unit 33 executes the "normal weighing function" in the "power-on clock amount mode". That is, in this case, the weight of the object to be weighed can be simply weighed.

Further, when the control unit 33 detects that the predetermined key has been operated in step S135 shifted from step S132 (Y in step S135), the control unit 33 transitions to the discriminant measurement mode (step S133) and executes the selected function. do. On the other hand, when no operation is performed (N in step S135), the control unit 33 continues to execute the normal weighing function as it is.

Further, when the control unit 33 determines in step S131 that the "automatic setting function" is currently being executed, the control unit 33 proceeds to step S134. When the "automatic setting function" (set value 003) is selected in the "scale setting mode" and the weighing device 1 is restarted, the "automatic setting function" is executed.

When the control unit 33 shifts to step S134, the control unit 33 executes the "automatic setting function" in the "power-on clock amount mode". Specifically, the "upper / lower limit value easy setting function" and the "upper / lower limit value easy call function" of the "automatic setting function" are executed in parallel.

When the "upper / lower limit value easy setting function" and the "upper / lower limit value easy call function" are executed, the accumulation of measurement information by the "upper / lower limit value easy setting function" and the "upper / lower limit value easy call function" is started ( Step S111 of FIG. 6 and step S121 of FIG. 9). Then, when the measurement is performed for the second predetermined number of times N2, the control unit 33 determines the degree of approximation between the measurement information of the object to be weighed this time and the measurement information accumulated in the past (FIG. 9). Step S122). The control unit 33 selects and calls past measurement information whose degree of approximation is equal to or higher than a predetermined threshold value and has the highest degree of approximation (step S123 in FIG. 9).

Here, the control unit 33 does not call the measurement information when there is no corresponding measurement information (past measurement information whose approximation degree is equal to or higher than a predetermined threshold value). In this case, the control unit 33 sets the lower limit value LL and the upper limit value UL (that is, the allowable weight range) when the weighing is further repeated and the weighing is performed for the first predetermined number of times N1 (step of FIG. 6). Together with S112), the measurement information obtained by the measurement of the first predetermined number of times N1 is stored (step S113 in FIG. 6).

In this way, by executing the "upper / lower limit value easy setting function" and the "upper / lower limit value easy call function" in parallel, the measurement information having characteristics similar to the characteristics of the object to be weighed this time can be obtained. If there is, the lower limit value LL or the like is called by calling the measurement information, and if there is no such measurement information, the lower limit value LL or the like is set from the measurement information being measured this time. In this way, by executing the "upper / lower limit value simple setting function" and the "upper / lower limit value easy call function" in parallel, the lower limit value LL or the like can be set quickly.

When the lower limit value LL and the upper limit value UL (allowable weight range) are set by the "upper / lower limit value simple setting function" or the "upper / lower limit value simple call function", the control unit 33 proceeds to step S133.

When the control unit 33 shifts from step S134 to step S133, the control unit 33 switches the state from the "power-on clock amount mode" to the "discrimination measurement mode". As a result, the "automatic setting function" is executed in the "discrimination measurement mode". Specifically, the "upper / lower limit determination function" of the "automatic setting function" is executed based on the lower limit value LL or the like set in step S133. That is, the weight of the object to be weighed placed on the weighing pan 20 thereafter is light weight (less than the lower limit value LL), excessive amount (greater than the upper limit value UL), or an appropriate amount (greater than or equal to the lower limit value LL and the upper limit value). It can be determined whether the value is UL or less).

As described above, in the weighing device 1 of the present embodiment, after the "upper / lower limit value easy setting function" and the "upper / lower limit value easy call function" are executed in the "automatic setting function" and the lower limit value LL or the like is set. The "upper / lower limit discrimination function" is automatically executed. With this configuration, the operator automatically sets the lower limit value LL, etc., and automatically starts using the "upper / lower limit discrimination function" simply by repeating the weighing operation of the object to be measured. be able to.

When the "automatic setting function" is executed in this "power-on clock amount mode", the lower limit value LL and the like are automatically set according to the actual weighing situation, but the operator manually sets the lower limit value LL as necessary. Etc. may be set.

Specifically, when the "automatic setting function" is executed in the "power-on clock amount mode" and the state is switched to the "product number setting mode" via the "product number selection mode" (see FIG. 4). ), The lower limit value LL and the like as shown in FIG. 12 can be set manually. By appropriately operating the operation key group 14, the operator specifies the name (product number) of the table to be set (step S141), sets the lower limit value LL (step S142), and sets the upper limit value UL (step S143). , The lower limit value LL and the upper limit value UL can be confirmed (registration completed) (step S144) manually.

Further, even in the state where the "upper / lower limit discrimination function" is executed in the "discrimination measurement mode", the operator can manually set the lower limit value LL or the like. Specifically, when the "upper / lower limit discrimination function" is executed in the "discrimination measurement mode" and the state transitions to the "product number setting mode" via the "product number selection mode" (see FIG. 4), The lower limit value LL and the like as shown in FIG. 12 can be set manually.

Further, in the state where the "rank selection function" is executed in the "discrimination measurement mode", the operator can manually set the rank (weight range of each rank). Specifically, when the "rank selection function" is being executed in the "discrimination measurement mode" and the state is switched to the "product number setting mode" via the "product number selection mode" (see FIG. 4), As shown in FIG. 13, the rank can be set manually. By appropriately operating the operation key group 14, the operator specifies the name (product number) of the table to be set (step S151), sets the lower limit value of rank 1 (first rank) (step S152), The lower limit value of rank 2 (second rank) can be set (step S153), ..., The lower limit value of each rank can be determined (registration completed) (step S154) manually.

When each setting is completed in the "product type setting mode", the state is switched from the "product type setting mode" to the "discrimination measurement mode", and measurement using the "upper / lower limit discrimination function" or the like becomes possible.

As described above, the measuring device 1 according to the present embodiment is
Weighing pan 20 (mounting part) on which the object to be weighed can be placed,
A weighing unit (control unit 33) capable of measuring the weight of the object to be weighed placed on the measuring plate 20 and
Weighing information including at least the weight when the object to be weighed placed on the weighing pan 20 is removed (“the weight removed last”) is accumulated, and the object to be weighed is based on the accumulated weighing information. A function execution unit (control unit 33) capable of determining an allowable weight range (lower limit value LL and upper limit value UL) and executing an upper / lower limit value simple setting function (allowable range setting function) for storing the allowable weight range.
Is provided.
With this configuration, the allowable weight range can be easily set. That is, the operator can automatically set the allowable weight range only by performing the weighing work (weighing work so as to reach the target range) of the object to be weighed as usual. As a result, preparations (setting of the allowable weight range) for executing the upper / lower limit discrimination function can be easily performed.

In addition, the function execution unit
When the allowable weight range is stored by the upper / lower limit value simple setting function, an upper / lower limit determination function for determining whether or not the object to be weighed by the measuring unit is included in the stored allowable weight range. The execution of (first determination function) is started (see FIG. 11).
With this configuration, the upper / lower limit discrimination function can be easily used. That is, since the upper / lower limit discrimination function is automatically executed when the allowable weight range is set by the upper / lower limit value simple setting function, the operator can use the upper / lower limit discrimination function only by continuing the weighing work. ..

In addition, the above-mentioned upper and lower limit value easy setting function
The permissible weight range is stored for each type of the object to be weighed.
The function execution unit
Based on the weighing information of the object to be weighed by the measuring unit, the optimum allowable weight range is selected from the allowable weight range for each product type stored by the upper / lower limit value simple setting function. The lower limit simple call function (allowable range selection function) can be executed.
With this configuration, the allowable weight range can be easily set. That is, the allowable weight range can be set in a relatively short time by calling the allowable weight range stored in advance.

In addition, the function execution unit
When the allowable weight range is selected by the upper / lower limit value simple calling function, an upper / lower limit determination function for determining whether or not the object to be weighed by the measuring unit is included in the selected allowable weight range. The execution of (second determination function) is started (see FIG. 11).
With this configuration, the upper / lower limit discrimination function can be easily used. That is, since the upper / lower limit discrimination function is automatically executed when the allowable weight range is set by the upper / lower limit value simple call function, the operator can use the upper / lower limit discrimination function only by continuing the weighing work. ..

The measuring plate 20 according to the present embodiment is an embodiment of the mounting portion according to the present invention.
Further, the control unit 33 according to the present embodiment is an embodiment of the measurement unit and the function execution unit according to the present invention.
Further, the upper / lower limit value simple setting function according to the present embodiment is an embodiment of the allowable range setting function according to the present invention.
Further, the upper / lower limit discrimination function according to the present embodiment is an embodiment of the first determination function and the second determination function according to the present invention.
Further, the upper / lower limit value simple calling function according to the present embodiment is an embodiment of the allowable range selection function according to the present invention.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above configuration, and various modifications can be made within the scope of the invention described in the claims.

For example, the configuration (shape, size, etc.) of each part of the weighing device 1 is not limited and can be changed as appropriate.

Further, in the present embodiment, an example in which the "upper / lower limit value simple setting function" and the "upper / lower limit value easy call function" are executed in parallel is shown, but the present invention is not limited to this, and the "upper / lower limit value simple setting function" is not limited to this. The "easy value setting function" and the "easy call function for upper and lower limits" may be executed individually.

Further, in the "upper / lower limit value simple setting function" of the present embodiment, an example in which the value itself of the "last removed weight" (see FIG. 6) is set as the lower limit value LL and the upper limit value UL is shown. Is not limited to this. That is, the lower limit value LL and the upper limit value UL may be set by performing appropriate processing (correction) on the value of the "last removed weight". For example, in the measurement performed multiple times, if the value of "last removed weight" that seems to be incorrect (for example, when it is significantly different from other values) is included, the value is used. After omitting it, the lower limit value LL and the upper limit value UL can be set. In this case, the value of the "last removed weight" and the values of the lower limit value LL and the upper limit value UL that are actually set are different. It is desirable to store the lower limit value LL and the like set by providing the item of "lower limit value LL and upper limit value UL" separately from the item of "weight removed from".

Further, in the "upper / lower limit value simple setting function" of the present embodiment, it has been described that the lower limit value LL and the upper limit value UL are set when the measurement is performed for the first predetermined number of times N1, but the lower limit value LL and the like are set. The timing to set (the number of measurements) is not limited to this. For example, the operator may arbitrarily change the number of times (first predetermined number of times N1). Further, instead of setting the first predetermined number of times N1 to a fixed value, when the control unit 33 determines that the information necessary for setting the lower limit value LL or the like has been accumulated, the lower limit value LL or the like is set. It can also be configured to do so. For example, by setting the lower limit value LL or the like when the weight value (that is, the lower limit value LL and the upper limit value UL) that is the boundary of the target range desired by the operator is found, the lower limit value LL or the like is set. Etc. can be completed in as short a time as possible.

Further, in the "upper / lower limit value simple call function" of the present embodiment, when the measurement is performed for the second predetermined number of times N2, the degree of approximation between the measurement information of the object to be measured and the measurement information accumulated in the past However, the timing (number of times of measurement) for determining the degree of approximation is not limited to this. For example, the operator may arbitrarily change the number of times (second predetermined number of times N2). Further, instead of setting the second predetermined number of times N2 to a fixed value, it is also possible to determine the degree of approximation each time the measurement is performed and call the measurement information when the measurement information having a high degree of approximation is found. Is.

1 Weighing device 10 Main body 13 Load cell 14 Operation key group 15 Liquid crystal display 16 LED display 20 Weighing pan 33 Control unit

Claims (5)

A mounting part on which the object to be weighed can be placed,
A measuring part that can measure the weight of the object to be weighed placed on the above-mentioned placing part,
Weighing information including at least the weight when all the objects to be weighed placed on the above-mentioned place is removed is accumulated, and the allowable weight range of the objects to be weighed is determined based on the accumulated weighing information. A function execution unit that can execute the allowable range setting function that stores the allowable weight range,
Equipped with
The function execution unit
The operator adjusts the weight by adding the object to be weighed to the object to be weighed placed on the above-mentioned place or removing a part of the object to be weighed placed on the above-mentioned place to adjust the weight. When the weight of the object to be weighed placed on the description place is within the target range, a series of operations of removing all the objects to be weighed is regarded as one weighing, and when the predetermined number of weighings is completed, the allowable range The setting function can be executed automatically,
In the permissible range setting function, the lower limit of the permissible weight range is based on the smallest weight among the weights when all the objects to be weighed placed on the above-mentioned placement part included in the accumulated weighing information are removed. Set the value and set the upper limit of the allowable weight range based on the heaviest weight.
Weighing device. The weighing information includes the weight of the object to be weighed when it is first placed on the above-mentioned resting portion.
The function execution unit
Based on the weight when the object to be measured is first placed on the above-mentioned place and the weight when all the objects to be placed on the above-mentioned place are removed, the object is placed on the above-mentioned place. It is recognizable that the weight of the placed object to be weighed is outside or within the target range.
The allowable weight range can be determined based on the recognition result that the weight of the object to be weighed is outside the target range or within the target range.
The weighing device according to claim 1. The function execution unit
When the allowable weight range is stored by the allowable range setting function, execution of the first determination function for determining whether or not the object to be weighed by the measuring unit is included in the stored allowable weight range. To start,
The weighing device according to claim 1 or 2. The permissible range setting function
The permissible weight range is stored for each type of the object to be weighed.
The function execution unit
Tolerance range selection to select the optimum allowable weight range from the allowable weight range for each product type stored by the allowable range setting function based on the measurement information of the object to be weighed by the measuring unit. The function is feasible,
The weighing device according to any one of claims 1 to 3. The function execution unit
When the allowable weight range is selected by the allowable range selection function, execution of a second determination function for determining whether or not the object to be weighed by the measuring unit is included in the selected allowable weight range. To start,
The weighing device according to claim 4.

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