JP2016148532A - Weighing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weighing device capable of easily setting an allowable weight range of an object to be weighed.SOLUTION: The weighing device comprises: a weighing part (control part 33) for weighing an object to be weighed; a setting part (control part 33) for setting a first reference weight value (lower limit value LL) and a second reference weight value (upper limit value UL) different from the first reference weight value; and a storage part 33a for storing a predetermined operation value (predetermined ratio R or predetermined scale interval S). A value weighed by the weighing part (control part 33) is set as the first reference weight value (lower limit value LL), and the second reference weight value (upper limit value UL) is set based on the first reference weight value (lower limit value LL) and the predetermined operation value (predetermined ratio R or predetermined scale interval S).SELECTED DRAWING: Figure 5

Description

  The present invention relates to a weighing device that measures the weight of an object to be weighed, and more particularly to a weighing device having a function of setting an allowable weight range of the object to be weighed.

  Patent Document 1 described later discloses an example of the weighing device. The weight setting device for an electronic balance described in Patent Document 1 includes an actual weight calculation unit that calculates an actual weight of an object to be measured, a corrected weight calculation unit that calculates a corrected weight, and a setting key. The setting keys include an up key and a down key, and various setting keys.

  In this electronic scale weight setting device, the actual weight of the object to be weighed is corrected based on a signal (adjustment information) output by operating the up key and down key, and the setting key (for example, the upper limit key) is operated. The corrected weight is stored as a set weight (for example, an upper limit weight) based on the signal output by.

Japanese Patent Laid-Open No. 5-340795

  In the weight setting device of the electronic balance, when setting the upper limit weight (allowable weight) and the lower limit weight (allowable weight) of the object to be weighed, the upper limit weight value and the lower limit weight value must be set individually. The operation for setting the allowable weight range of the object to be weighed becomes complicated.

  In order to solve the above problems, an object of the present invention is to provide a weighing device that can easily set an allowable weight range of an object to be weighed.

    In order to achieve the above object, a weighing device according to an aspect of the present invention includes a weighing unit that measures the weight of an object to be weighed, and a second reference weight value different from the first reference weight value and the first reference weight value. And a storage unit for storing a predetermined calculation value. The measurement value measured by the measurement unit is set as a first reference weight value, and the first reference weight value and the predetermined calculation value are set. A second reference weight value is set based on

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

The perspective view which showed the whole structure of the weighing | measuring apparatus which concerns on 1st embodiment of this invention. Similarly, a side cross-sectional schematic diagram. Similarly, the block diagram which showed the structure regarding control. The block diagram which showed the item and setting value which setting mode has. The flowchart which showed the procedure of the upper / lower limit simple setting. The flowchart which showed the procedure of the upper / lower limit simple setting of the measuring apparatus which concerns on 2nd embodiment.

  Hereinafter, the front-rear direction, the up-down direction, and the left-right direction are defined according to the arrows shown in the drawing.

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

  The weighing device 1 measures the weight of an object to be weighed. Here, the object to be weighed means various objects to be weighed by the weighing device 1. The weighing device 1 mainly includes a main body 10 and a weighing pan 20.

  The main body 10 is a 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 unit 15, an LED display unit 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 incline from the rear upper side toward the front lower side.

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

  The load cell 13 is a sensor that detects a load. The load cell 13 is disposed from the front / rear midway part to the rear part in the housing 11. The load cell 13 can detect the load by detecting strain generated by the load.

  The operation key group 14 is for performing operations related to the weighing device 1. The operation key group 14 is disposed in the vicinity of the left end portion of 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 operation key group 14 according to the present embodiment is an embodiment of the operation unit according to the present invention.

  The first operation key 14a is mainly used when the weighing apparatus 1 is turned on and off. When the first operation key 14a is pushed in, the weighing device 1 is turned on. In addition, when the weighing device 1 is turned on, the weighing device 1 is turned off when the first operation key 14a is continuously pushed in (depressed) for a predetermined time.

The second operation key 14 b is mainly used when switching the display of the liquid crystal display unit 15. Specifically, information (for example, various setting values) displayed on the liquid crystal display unit 15 each time the second operation key 14b is pressed in a state where nothing is placed on the weighing pan 20. It is switched in a predetermined order.
The second operation key 14b is used when switching items displayed on the liquid crystal display unit 15 in a “setting mode” to be described later.

The third operation key 14c is mainly used when taring. The manner in which taring is performed using the third operation key 14c will be described later.
The third operation key 14c is used to increase a setting value displayed on the liquid crystal display unit 15 in a “setting mode” to be described later.

The fourth operation key 14d is mainly used when performing zero point reset. The manner in which zero reset is performed using the fourth operation key 14d will be described later.
The fourth operation key 14d is used to decrease a setting value displayed on the liquid crystal display unit 15 (to be described later) in a “setting mode” to be described later.

  The liquid crystal display unit 15 displays various information related to the weighing device 1. The liquid crystal display unit 15 is disposed at a substantially central portion on the left and right of the front surface of the housing 11. The liquid crystal display unit 15 according to the present embodiment is an embodiment of a notification unit according to the present invention. Further, the notification unit according to the present invention is not limited to the liquid crystal display unit 15 and may be, for example, a speaker that guides a measurement value.

  The LED display unit 16 displays whether the weight of the object to be weighed is included in a preset range. The LED display unit 16 is disposed at a substantially central portion on the left and right sides of the front surface of the housing 11 and in 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 used to control various calculations and storage related to the weighing device 1. On the control board 17, a storage unit 33a, a calculation unit 33b and the like which will be described later are arranged. The control board 17 is disposed in the front part in the casing 11 (immediately behind the front surface of the casing 11).

  The weighing pan 20 is a substantially rectangular plate-shaped member. 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 disposed above the main body 10. A substantially central portion of the lower surface of the weighing pan 20 is fixed to 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, a configuration relating to 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 configuration related to control.

  The control unit 33 performs control related to 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 includes a RAM, a ROM, and the like. The storage unit 33a stores a program related to the control of the weighing device 1 in advance. Further, new information relating to the control of the weighing device 1 can be stored in the storage unit 33a.

  The calculation unit 33b performs various calculations. The calculation unit 33b is configured by a CPU or the like. The calculation unit 33b controls the weighing device 1 by executing a 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 an 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).

  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.

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

  Moreover, the control part 33 (calculation part 33b) can light the said LED display part 16 in red, blue, or yellow by transmitting a display signal to the LED display part 16. FIG.

  The control unit 33 according to the present embodiment is an embodiment of the measurement unit and the setting unit according to the present invention. The storage unit 33a according to the present embodiment is an embodiment of the storage unit according to the present invention.

  Next, “weighing mode” and “setting mode” of the weighing device 1 configured as described above will be described.

  The “weighing mode” of the weighing device 1 is a mode for simply weighing the object to be weighed or performing a predetermined function to weigh the object to be weighed.

  First, how the weight of the object to be weighed is weighed in the “weighing mode” will be described.

  When an object to be weighed is placed on the weighing pan 20, the load applied to the weighing pan 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 computing unit 33b calculates the load applied to the load cell 13 (and hence the weight of the object placed on the weighing pan 20) from the received digital signal according to the program stored in the storage unit 33a. The calculation unit 33b causes the liquid crystal display unit 15 to display the calculated weight of the object to be weighed. The operator can confirm the weight of the object to be weighed by looking at the display on the liquid crystal display unit 15.

  Next, how taring is performed using the third operation key 14c in the “weighing mode” will be described.

  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 unit 15 in the state (the above-described state). The weight calculation result is adjusted so that the weight of the container becomes zero. When the object to be weighed put in the container in this state is weighed together with the container, the weight of only the object to be weighed from which the weight of the container is subtracted is displayed on the liquid crystal display unit 15. As a result, the net weight of the object to be weighed in the container can be easily measured.

  Next, how the zero reset is performed using the fourth operation key 14d in the “weighing mode” will be described.

  When the fourth operation key 14d is pushed in, the control unit 33 adjusts the weight calculation result so that the weight of the object to be weighed displayed on the liquid crystal display unit 15 in this state becomes zero. Accordingly, by pressing the fourth operation key 14d while the object to be weighed is not placed on the weighing pan 20, the zero point (the liquid crystal display unit when the object to be weighed is not placed on the weighing pan 20 is displayed. 15) can be corrected, and accurate weighing can be performed.

  In the “weighing mode”, the weight of the object to be weighed can be measured by executing a predetermined function (“checker function”, “rank selection function”, etc.). The contents of the function will be described later.

  The “setting mode” of the weighing device 1 is a mode for changing the weighing device 1 to a state in which a predetermined function can be executed or changing various settings.

  When a predetermined operation is performed using the operation key group 14 (for example, the third operation key 14c and the fourth operation key 14d are pushed in at the same time), the control unit 33 changes the state of the weighing device 1 to “measurement mode”. ”To“ Setting mode ”.

  As shown in FIG. 4, in “setting mode”, mainly “function selection” (item 01), “lower limit normal setting” (item 02), “upper limit normal setting” (item 03), “upper and lower limits”. Select and execute “Change value simple setting method” (item 04), “Change ratio of simple setting of upper / lower limit value” (item 05), “Change scale number of simple setting of upper / lower limit value” (item 06), etc. Can do. The items 01 to 06 are shown as an example, and the “setting mode” has other items. In the following, the method for selecting each item (item 01 to item 06) in the “setting mode” will be described with reference to FIGS. 3 and 4 and then the details of each item (item 01 to item 06) will be described. To do.

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

  Similarly, every time the operator presses down the second operation key 14b, the control unit 33 displays the item 03 (for example, the number “03”) and the item 04 (for example, the number “04”). ), A display indicating the item 05 (for example, a number “05”) and a display indicating the item 06 (for example, a number “06”) are sequentially displayed on the liquid crystal display unit 15.

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

  Thus, the operator can select a desired item from each item and display it on the left side portion of the liquid crystal display unit 15 by repeatedly pressing the second operation key 14b.

  Further, in a state where the display indicating each item is displayed on the left side portion of the liquid crystal display unit 15, the setting value regarding the item is displayed on the right side portion of the liquid crystal display unit 15. Here, the said setting value is a value which shows the setting content of each item. Details of setting values in each item will be described later.

  When the operator presses 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 presses the fourth operation key 14d, the control unit 33 decreases the set value displayed on the liquid crystal display unit 15. Thus, 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 manner, the operator can select a desired item and change the setting value of the item to a desired value. Further, after the set value is changed, when a predetermined determination operation is performed using the operation key group 14 (for example, the first operation key 14a is pressed once), the control unit 33 displays the item Stores the set value. At this time, if 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. Thereafter, the control unit 33 switches the state of the weighing device 1 from “setting mode” to “weighing mode”.

  Next, details of each item (item 01 to item 06) will be described.

  “Selection of function” (item 01) is an item for selecting a function of the weighing device 1 and making the function executable. The function of the weighing device 1 is assigned to the setting value of the item 01. Specifically, a “checker function” is assigned to the setting value 001, and a “rank selection function” is assigned to the setting value 002. The set value 001 and the set value 002 are shown as examples, and other functions are assigned to other set values.

  The “checker function” (set value 001) is whether the weight of the object to be weighed is included in a preset range (specifically, is a value between the lower limit value LL and the upper limit value UL). (Whether or not) is displayed on the LED display unit 16.

  Specifically, in the “weighing mode”, when an object to be weighed is placed on the weighing pan 20 with the “checker function” being executed, the control unit 33 calculates the weight of the object to be weighed. 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 not less than the lower limit value LL and not more than the upper limit value UL, the control unit 33 lights the LED display unit 16 in blue. The operator confirms the color of the LED display unit 16 to determine 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 appropriate (lower limit). LL or more and upper limit UL or less) can be easily determined.

  Here, the operator can set the lower limit value LL and the upper limit value UL in advance. Details of the method of 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 among the plurality of preset ranks (weight ranges) the weight of the object to be weighed is set. is there.

  As described above, in the item 01 (“select function”), different functions are assigned to the set value 001, the set value 002, and other set values.

  “Lower limit normal setting” (item 02) is an item for setting the lower limit value LL used in the “checker function” described above. The setting value of item 02 is stored as the value of lower limit value LL.

  Specifically, the operator repeats the pressing operation of the third operation key 14 c or the fourth operation key 14 d in a state where the display indicating the item 02 is displayed on the liquid crystal display unit 15, thereby causing the liquid crystal display unit 15 to be displayed. The displayed set value is increased or decreased and changed to a desired value. When the set value reaches a desired value, the operator performs a predetermined determination operation using the operation key group 14. When the determination operation is performed, the control unit 33 stores the set value displayed on the liquid crystal display unit 15 as the value of the lower limit value LL. At this time, the control unit 33 stores the lower limit value LL in a nonvolatile memory such as an EEPROM in the storage unit 33a. For this reason, even if the weighing apparatus 1 is turned off, the setting (storage) of the lower limit value LL is not erased.

  “Upper limit normal setting” (item 03) is an item for setting the upper limit UL used in the “checker function” described above. The set value of item 03 is stored as the value of upper limit value UL.

  Specifically, the operator repeats the pressing operation of the third operation key 14 c or the fourth operation key 14 d in a state where the display indicating the item 03 is displayed on the liquid crystal display unit 15, thereby causing the liquid crystal display unit 15 to be displayed. The displayed set value is increased or decreased and changed to a desired value. When the set value reaches a desired value, the operator performs a predetermined determination operation using the operation key group 14. When the determination operation is performed, the control unit 33 stores the set value displayed on the liquid crystal display unit 15 as the value of the upper limit value UL. At this time, the control unit 33 stores the upper limit value UL in a nonvolatile memory such as an EEPROM in the storage unit 33a. For this reason, even if the weighing apparatus 1 is turned off, the setting (storage) of the upper limit UL is not erased.

Here, as described in the above item 02 and item 03, a method of setting the lower limit value LL and the upper limit value UL by repeatedly pressing the third operation key 14c or the fourth operation key 14d, respectively, will be described below. This is referred to as “upper / lower limit normal setting”.
On the other hand, as will be described later, a method of automatically setting the upper limit value UL by setting the lower limit value LL by a predetermined operation is hereinafter referred to as “upper / lower limit simple setting”.

  “Upper / lower limit simple setting method change” (item 04) is an item for changing the calculation method of the upper limit value UL when the upper limit value UL is set using the upper / lower limit simple setting. The setting value (setting value 001 and setting value 002) of the item 04 is assigned with a method for calculating the upper limit value UL. Specifically, a calculation method using “ratio” is assigned to the set value 001, and a calculation method using “number of scales” is assigned to the set value 002.

  The calculation method using “ratio” (set value 001) is a method in which a value obtained by increasing the lower limit value LL by a predetermined ratio R with respect to the lower limit value LL is set as the upper limit value UL. In the present embodiment, the ratio R is expressed as a percentage (%). Further, in the present embodiment, the possible value of the ratio R is set to “5 <proportion R <100”, and the upper limit value UL is an equation of “upper limit value UL = lower limit value LL × (100 + proportion R)”. It is assumed that it is calculated using The upper limit UL obtained in this way is a value obtained by increasing the lower limit LL by a ratio R (%).

  The calculation method using the “number of scales” (set value 002) is based on the lower limit LL, and a value obtained by adding a predetermined scale number S (that is, a predetermined weight) to the lower limit LL is an upper limit UL. It is a method to set as. In the present embodiment, the possible value of the scale quantity S is set to “10 <scale quantity S <300”, and the upper limit UL is “upper limit UL = lower limit LL + scale quantity S”. It shall be calculated using mathematical formulas. The upper limit UL determined in this way is a value obtained by increasing the lower limit LL by the number of scales S.

  “Change ratio of upper / lower limit simple setting” (item 05) is an item for changing the value of the ratio R described above. The setting value of item 05 is stored as the value of ratio R.

  Specifically, the operator repeats the pressing operation of the third operation key 14c or the fourth operation key 14d in a state where the display indicating the item 05 is displayed on the liquid crystal display unit 15, thereby causing the liquid crystal display unit 15 to display. The displayed set value is increased or decreased and changed to a desired value. When the set value reaches a desired value, the operator performs a predetermined determination operation using the operation key group 14. When the determination operation is performed, the control unit 33 stores the set value displayed on the liquid crystal display unit 15 as the value of the ratio R.

  The “upper / lower limit simple setting scale number change” (item 06) is an item for changing the value of the scale quantity S described above. The setting value of item 06 is stored as the value of scale number S.

  Specifically, the operator repeats the pressing operation of the third operation key 14c or the fourth operation key 14d in a state where the display indicating the item 06 is displayed on the liquid crystal display unit 15, thereby causing the liquid crystal display unit 15 to The displayed set value is increased or decreased and changed to a desired value. When the set value reaches a desired value, the operator performs a predetermined determination operation using the operation key group 14. When the determination operation is performed, the control unit 33 stores the set value displayed on the liquid crystal display unit 15 as the value of the scale number S.

  Next, the procedure for simply setting the upper and lower limit values will be described in detail with reference to FIGS.

  As a premise for performing the upper / lower limit simple setting, the operator sets the values of the ratio R and the scale number S in advance in the item 05 and the item 06 of the “setting mode”. In addition, in the item 04 of “setting mode”, the operator selects either the calculation method using “ratio” (setting value 001) or the calculation method using “number of scales” (setting value 002). Keep it.

  In the following description, the operator selects a calculation method (setting value 001) using “ratio” in item 04 of “setting mode”, and sets “10 (%)” as the value of ratio R in item 05. It is assumed that it is set.

  In step S110 of FIG. 5, the operator places an object to be weighed on the weighing pan 20 of the weighing device 1 that has been switched to the “weighing mode”. At this time, the operator adjusts the amount of the weighing object placed on the weighing pan 20 so that the weight of the weighing object displayed on the liquid crystal display unit 15 becomes a value to be set as the lower limit value LL. For example, when “100 (g)” is set as the value of the lower limit value LL, the operator adjusts the amount of the object to be weighed so that “100 (g)” is displayed on the liquid crystal display unit 15. .

  Next, in step S120, the operator presses the second operation key 14b once to perform an operation.

  Here, as described above, when the second operation key 14b is pushed in while nothing is placed on the weighing pan 20, the information displayed on the liquid crystal display unit 15 is switched. However, in a state where an object to be weighed is placed on the weighing pan 20, the information displayed on the liquid crystal display unit 15 is not switched even if the second operation key 14 b is pressed.

  Note that whether or not nothing is placed on the weighing pan 20 can be determined based on the weight calculated by the control unit 33. Specifically, when the calculated weight is 0 (or a value close to 0), the control unit 33 determines that nothing is placed on the weighing pan 20. In addition, when the calculated weight is not 0 (or larger than the predetermined value by more than a predetermined value), the control unit 33 determines that something is placed on the weighing pan 20.

  Next, in step S130, the control unit 33 uses the weight (in this example, “100 (g)”) calculated at the time when the operation signal of the second operation key 14b is received as the value of the lower limit value LL. Set. At this time, the control unit 33 stores the lower limit value LL in a volatile memory such as a RAM of the storage unit 33a. For this reason, when the weighing apparatus 1 is turned off, the setting (storage) of the lower limit value LL is deleted.

  Next, in step S140, the control unit 33 sets the upper limit value UL based on the lower limit value LL. Specifically, the control unit 33 sets a value obtained by increasing the lower limit value LL by 10 (%), that is, 110 (g) as the value of the upper limit value UL.

  As described above, in the simple setting of the upper and lower limit values, the operator presses the second operation key 14b only once, and the weight of the object placed on the weighing pan 20 is set as the lower limit value LL. Can be set. When the lower limit value LL is set, the upper limit value UL is also automatically set.

  After the lower limit value LL and the upper limit value UL are set in this way, the set lower limit value LL and the upper limit value are selected by selecting the setting value 001 (“checker function”) in the item 01 of “setting mode”. A “checker function” using the UL can be executed.

  Note that the object to be weighed placed on the weighing pan 20 in step S110 may be different from the object to be weighed using the “checker function”. For example, even when food is weighed using the “checker function”, in step S110 (when the lower limit value LL is set), a lower limit value is used using an object (object to be weighed) different from the food, such as a weight. LL can be set.

  In the above description, it is assumed that the operator has selected the calculation method (setting value 001) using the “ratio” in the item 04 of “setting mode”. When the calculation method (setting value 002) using is selected, the lower limit value LL and the upper limit value UL can be set by the same operation.

  For example, in the item 06, when “10 (g)” is set as the value of the scale amount S, and “100 (g)” is set as the value of the lower limit value LL in step S130, the control unit 33 In step S140, a value obtained by increasing the lower limit value LL by 10 (g), that is, 110 (g) is set as the upper limit value UL.

  As described above, in the simple setting of the upper and lower limit values, the values of the lower limit value LL and the upper limit value UL can be set with a small number of operations (specifically, by pressing the second operation key 14b once). it can. That is, in the normal setting of the upper and lower limit values, it is necessary to set the values of the lower limit value LL and the upper limit value UL by repeatedly pressing the third operation key 14c and the fourth operation key 14d, and the operation is complicated. On the other hand, the simple setting of the upper and lower limit values is easy to operate.

  The lower limit value LL according to the present embodiment is an embodiment of the first reference weight value according to the present invention. The upper limit value UL according to the present embodiment is an embodiment of the second reference weight value according to the present invention.

  Further, the ratio R according to the present embodiment is an embodiment of the predetermined calculation value and the predetermined ratio according to the present invention. The scale number S according to the present embodiment is an embodiment of a predetermined calculation value and a predetermined value according to the present invention.

  The one-time pressing operation of the second operation key 14b according to the present embodiment is an embodiment of a predetermined first operation according to the present invention. Further, the pressing operation of the third operation key 14c and the fourth operation key 14d according to the present embodiment is an embodiment of the predetermined second operation according to the present invention.

  As described above, the weighing device 1 according to the present embodiment is different from the weighing unit (control unit 33) for weighing the object to be weighed, the first reference weight value (lower limit value LL), and the first reference weight value. A setting unit (control unit 33) that sets a second reference weight value (upper limit UL) and a storage unit 33a that stores a predetermined calculation value (predetermined ratio R or predetermined scale number S) are provided.

  The weighing value measured by the weighing unit (control unit 33) is set as the first reference weight value (lower limit value LL), and the first reference weight value (lower limit value LL) and the predetermined calculation value (predetermined value) The second reference weight value (upper limit UL) is set based on the ratio R or the predetermined scale number S).

  Furthermore, a notification unit (liquid crystal display unit 15) that notifies the measurement value and an operation unit (operation key group 14) operated by the operator are provided, and the measurement value is notified (displayed) by the notification unit (liquid crystal display unit 15). ), When the operator performs a predetermined first operation (one-time pressing operation of the second operation key 14b) by the operation unit (operation key group 14), the measured value is set to the first reference weight value. Set as (lower limit LL).

  By comprising in this way, the lower limit LL and the upper limit UL can be set easily. That is, when the lower limit value LL is set, the upper limit value UL is automatically set on the basis of the lower limit value LL, so that the number of operations by the operator for setting the lower limit value LL and the upper limit value UL can be reduced. it can. This eliminates the need to add a new operation key (for example, a numeric keypad for inputting a numerical value) in order to increase the efficiency of the operation.

  The predetermined calculation value (predetermined ratio R) is a value for increasing or decreasing the first reference weight value (lower limit value LL) by a predetermined ratio.

  With this configuration, the upper limit value UL can be set to an appropriate value. That is, the difference (that is, the appropriate amount range) between the lower limit value LL and the upper limit value UL can be determined according to the value of the lower limit value LL.

  Further, the predetermined calculation value (predetermined scale number S) is a value for adding or subtracting a predetermined value to the first reference weight value.

  With this configuration, the upper limit value UL can be set to an appropriate value. That is, regardless of the value of the lower limit value LL, the difference (that is, the appropriate amount range) between the lower limit value LL and the upper limit value UL can be determined.

  The lower limit value LL is set to be a value smaller than the upper limit value UL.

  With this configuration, it is possible to accurately set the lower limit value LL to be a desired value. That is, the lower limit value LL can be accurately set using the object to be weighed so as to be a value desired by the operator. Further, since the lower limit value LL can be set accurately, a measurement error of the lower limit value LL can be prevented, and is particularly suitable when the lower limit value LL of the object to be weighed is defined by a standard or the like. .

  The configuration of the weighing device according to the present invention is not limited to the weighing device 1 according to the present embodiment. For example, the weighing pan 20 only needs to be able to hold an object to be weighed, and the shape and size thereof can be arbitrarily changed. Moreover, the load cell 13 should just detect the load added to the weighing pan 20, and the structure can be changed arbitrarily.

  The first operation unit according to the present invention is not limited to the second operation key 14b according to the present embodiment. For example, other operation keys included in the operation key group 14 (for example, the first operation key 14a) may be used. Further, the first operation unit is not limited to the one that can be pushed in, and may be, for example, a touch panel or various switches.

  In the present embodiment, when the lower limit value LL is set, the upper limit value UL is automatically set based on the lower limit value LL. However, the present invention is not limited to this. For example, when the upper limit value UL is set, the lower limit value LL may be automatically set based on the upper limit value UL. In this case, the upper limit value UL corresponds to the first reference value according to the present invention, and the lower limit value LL corresponds to the second reference value according to the present invention. In this case, a value obtained by reducing the upper limit value UL by the ratio R, or a value obtained by subtracting the scale number S from the upper limit value UL can be set as the lower limit value LL.

  In the present embodiment, the second operation key 14b operated when setting the lower limit value LL is also used for other purposes (uses for switching information displayed on the liquid crystal display unit 15). However, the present invention is not limited to this. That is, apart from the second operation key 14b, an operation key operated when setting the lower limit value LL can be provided.

  Also, a plurality of lower limit values LL and upper limit values UL set by the upper and lower limit normal settings can be set. For example, by setting the lower limit value LL and the upper limit value UL for each type (item type, etc.) of the objects to be weighed, the work efficiency when weighing a plurality of types of objects to be weighed with one weighing device 1 is improved. be able to.

  Below, the measuring device 1 which concerns on 2nd embodiment is demonstrated using FIG.

  The main difference between the weighing device 1 according to the second embodiment and the weighing device 1 according to the first embodiment is the procedure for simple setting of the upper and lower limit values. Specifically, in the second embodiment, instead of the procedure of step S130 (see FIG. 5) according to the first embodiment, the upper and lower limit values are simply set by the procedure from step S131 to step S134 (see FIG. 6). Is done. This will be specifically described below.

  In step S <b> 110 of FIG. 6, the operator places an object to be weighed on the weighing pan 20 of the weighing device 1 switched to the “weighing mode”. At this time, the operator sets the amount of the weighing object placed on the weighing pan 20 so that the weight of the weighing object displayed on the liquid crystal display unit 15 becomes a value close to the value to be set as the lower limit value LL. Adjust. For example, when it is desired to set “100 (g)” as the value of the lower limit value LL, the operator sets the amount of the object to be weighed so that a value close to “100 (g)” is displayed on the liquid crystal display unit 15. Adjust. In this description, it is assumed that the object to be weighed is placed on the weighing pan 20 so that, for example, “105 (g)” is displayed on the liquid crystal display unit 15.

  Next, in step S120, the operator presses the second operation key 14b once to perform an operation.

  Next, in step S131, the control unit 33 uses the weight (in this example, “105 (g)”) calculated when the operation signal of the second operation key 14b is received as the value of the lower limit value LL. Memorize temporarily. The control unit 33 causes the liquid crystal display unit 15 to display the lower limit value LL.

  Next, in step S132, the operator repeats the pressing operation of the third operation key 14c or the fourth operation key 14d, thereby increasing or decreasing the lower limit value LL displayed on the liquid crystal display unit 15 to a desired value. (That is, a value to be set as the lower limit value LL). In this example, the operator causes the liquid crystal display unit 15 to display “100 (g)” by pressing the fourth operation key 14 d a plurality of times.

  Next, in step S133, the operator presses the second operation key 14b once to perform an operation.

  Next, in step S134, the control unit 33 sets the weight (in this example, “100 (g)”) displayed on the liquid crystal display unit 15 at the time of receiving the operation signal of the second operation key 14b to the lower limit. Set as value LL.

  Next, in step S140, the control unit 33 sets the upper limit value UL based on the lower limit value LL.

  As described above, in the simple setting of the upper and lower limit values in the second embodiment, the operator not only adjusts the amount of the object to be weighed placed on the weighing pan 20, but also the third operation key 14c and the fourth operation key. The operation key 14d can also be used to set the lower limit value LL. As described above, when the third operation key 14c and the fourth operation key 14d are used, it is difficult to adjust the amount of the objects to be weighed (for example, each of the objects to be weighed is a large lump and the weight is finely adjusted. Even if it is difficult, the lower limit LL can be set accurately so as to be a desired value.

  As described above, in the weighing device 1 according to the present embodiment, the operator performs a predetermined first operation (second operation key) in a state where the measurement value is notified (displayed) by the notification unit (liquid crystal display unit 15). If the predetermined second operation (the pressing operation of the third operation key 14c and the fourth operation key 14d) is performed by the operation unit before the single pressing operation of 14b is performed, the weighing is performed based on the predetermined second operation. In addition to changing the value, when the operator performs a predetermined first operation (a single push operation of the second operation key 14b) after the predetermined second operation, the changed measurement value is set to the first reference weight. Set as a value (lower limit LL).

  With this configuration, the lower limit LL can be finely adjusted as necessary. As a result, the lower limit LL can be accurately set to a desired value.

  The second operation unit according to the present invention is not limited to the third operation key 14c and the fourth operation key 14d according to the present embodiment. That is, the second operation unit is not limited to a push-in operation, and may be a unit that can easily change a value (numerical value), such as a jog dial, a touch sensor type wheel, or a cross-shaped cursor key.

  Below, the measuring apparatus 1 which concerns on 3rd embodiment is demonstrated.

  The weighing device 1 according to the third embodiment is mainly different from the weighing device 1 according to the first embodiment in that the lower limit value LL set by the upper / lower limit simple setting is not a volatile memory such as a RAM. The point is stored in a non-volatile memory such as an EEPROM.

  Specifically, in step S130 shown in FIG. 5, the control unit 33 stores the lower limit value LL in a nonvolatile memory such as an EEPROM in the storage unit 33a. For this reason, even if the weighing apparatus 1 is turned off, the setting (storage) of the lower limit value LL is not erased.

  In the weighing device 1 according to the third embodiment configured as described above, even if the power is turned off once, the setting of the lower limit value LL remains without being erased. Therefore, if the power is turned on again, the lower limit value LL and The “checker function” can be executed without setting the upper limit value UL.

  In addition, when the ratio R and the scale number S are changed (see the item 05 and the item 06 in FIG. 4) while the setting of the lower limit value LL remains, the control unit 33 performs the ratio R and the scale number S. Based on the above, the upper limit value UL is calculated again.

  As described above, when the operator wants to change only the upper limit value UL while keeping the lower limit value LL as it is, the upper limit value UL is changed to the ratio R or the scale number S by changing the ratio R or the scale number S. It can be changed to a value according to. Accordingly, it is possible to improve the efficiency of setting the upper limit value UL when weighing an object to be weighed (determined by a standard or the like) that does not require changing the lower limit value LL.

  In the weighing device 1 according to the third embodiment, the lower limit value LL is always stored in a nonvolatile memory such as an EEPROM, but the present invention is not limited to this. For example, the lower limit LL can be stored in the nonvolatile memory only when a predetermined operation is performed using the operation key group 14.

As described above, the weighing device 1 according to each of the above embodiments includes the control unit 33 (first changing unit) that can change the value of the ratio R.
By comprising in this way, the value of the upper limit UL with respect to the lower limit LL can be changed arbitrarily.

Moreover, the measuring device 1 according to each of the above embodiments includes a control unit 33 (second changing unit) that can change the value of the scale number S.
By comprising in this way, the value of the upper limit UL with respect to the lower limit LL can be changed arbitrarily.

In addition, the weighing device 1 according to the third embodiment includes a control unit 33 (reference value storage unit) that stores the set lower limit value LL, and a ratio R (after the lower limit value LL is stored in the control unit 33. Alternatively, the control unit 33 (resetting unit) is configured to recalculate (set) the value of the upper limit value UL when the value of the scale interval number S) is changed.
By configuring in this way, it is possible to improve the working efficiency when weighing an object to be weighed by changing only the value of the upper limit value UL without changing the value of the lower limit value LL.

In addition, the control unit 33 according to each of the above embodiments performs predetermined control without setting the lower limit value LL when the second operation key 14b is operated in a state where the object to be weighed is not held on the weighing pan 20. (Switching information displayed on the liquid crystal display unit 15).
With this configuration, the number of operation keys can be reduced. That is, the operation key (second operation key 14b) for setting the lower limit value LL can be used for other purposes (use for switching information displayed on the liquid crystal display unit 15). The number can be reduced. Further, it is possible to prevent complication of operation due to an increase in the number of operation keys.

DESCRIPTION OF SYMBOLS 1 Weighing device 10 Main body part 13 Load cell 14 Operation key group 14b Second operation key 14d Fourth operation key 15 Liquid crystal display part 16 LED display part 20 Weighing pan 33 Control part

Claims (6)

A weighing unit for weighing the object to be weighed;
A setting unit for setting a first reference weight value and a second reference weight value different from the first reference weight value;
A storage unit for storing predetermined calculation values;
With
Setting the weighing value measured by the weighing unit as the first reference weight value, and setting the second reference weight value based on the first reference weight value and the predetermined calculation value;
Weighing device. An informing unit for informing the measurement value;
An operation unit operated by an operator;
Further comprising
When the operator performs a predetermined first operation with the operation unit in a state where the measurement value is notified by the notification unit, the measurement value is set as the first reference weight value.
The weighing device according to claim 1. When the operator performs a predetermined second operation by the operation unit before performing the predetermined first operation in a state where the measurement value is notified by the notification unit, the predetermined second The weight value is changed based on an operation, and when the operator performs the predetermined first operation after the predetermined second operation, the changed weight value is changed to the first reference weight value. Set as
The weighing device according to claim 1 or 2. The predetermined calculation value is a value for increasing or decreasing the first reference weight value by a predetermined ratio.
The weighing device according to any one of claims 1 to 3. The predetermined calculation value is a value for adding or subtracting a predetermined value to the first reference weight value.
The weighing device according to any one of claims 1 to 3. The first reference weight value is set to be smaller than the second reference weight value;
The weighing device according to any one of claims 1 to 5.

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