JP2017058234A - Weighing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weighing device that is used for producing multiple kinds of products different in target weight value and simplifies work of setting information necessary for weighing each weighed object constituting the products.SOLUTION: A weighing device comprises: a weight sensor 13 and a controller 20 that measure weight of a weighed object on a weighing dish 12; an operation part 16 that is used for preliminarily inputting weight measurement setting information consisting of information which includes a minimum target candidate value being a minimum value among multiple target candidate values capable of being respective target weight values, includes appropriate weight range determination information for determining an appropriate weight range and includes none of the target candidate values other than the minimum target candidate value; the controller 20 that, on the basis of a weight value of the weighed object and the weight measurement setting information, derives the target weight value which is equal to any one of the target candidate values and corresponds to the weight value of the weighed object, derives the appropriate weight range corresponding to the target weight value and then determines whether or not the weight value of the weighed object is within the appropriate weight range; a determination lamp 18 that indicates a determination result; and a display part 17 that displays the target weight value.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a weighing device used for an operator to perform a work of filling a certain amount of objects to be weighed into a bag or a container.

  2. Description of the Related Art Conventionally, weighing devices have been used in production factories, retail stores, and the like that produce foods and the like in order to produce a quantitatively packed product in which a certain amount of objects to be weighed is packed in bags or containers.

  Patent Document 1 describes a target weight notification device used for a weighing device in which a target weight is set. This target weight notification device indicates a lack of measurement value and a measurement value over with a different sound with respect to a set target weight, and a target weight storage means for storing a plurality of target weight values at weight intervals; The weighing value is compared with the target weight value from the output signal of the weighing sensor, the weighing rank determination means for determining which target weight rank the weighing value belongs to, and an alarm sound is commanded according to the determination result of the weighing rank determination means An alarm sound command means, a target achievement determination means for determining that the measured value has reached the target weight, and an alarm sound change means for changing the alarm sound according to the command of the target achievement determination means, and a plurality of targets A warning sound is generated for each weight.

JP 2007-139716 A

  When producing a fixed amount of commodities, an appropriate amount range including a target value (target weight value) of the weight of an item to be weighed as one commodity is set in advance in the weighing device. When the weight value of the object to be weighed is within an appropriate amount range, it is notified that the object is an appropriate amount. An operator places an object to be weighed on a weighing device, takes out the object to be weighed in an appropriate amount from the weighing device, and packs it in a bag or a container to produce a quantitatively packed product. Also, the same weighing device is used for the production of products with different target weight values, such as 100g packed products and 200g packed products.

  In a conventional weighing device used for the production of such quantitatively packed products, weighing conditions (information) necessary for quantitative weighing such as target weight values must be set in advance for each product having different target weight values. Therefore, the setting work is complicated. The more types of products with different target weight values, the more complicated the setting work.

  The present invention has been made to solve the above-described problems, and in a weighing device used for production of a plurality of types of products having different target weight values, to measure the objects to be weighed as those products. An object of the present invention is to provide a weighing device that makes it easy to set necessary information.

  In order to achieve the above object, a weighing device according to an embodiment of the present invention comprises a weighing means for weighing the weight of an object to be weighed placed on a placement portion, and an equality number sequence or an equality number sequence, and a target weight value. A minimum target candidate value that is the minimum value among a plurality of target candidate values that can be, and appropriate range defining information that is information necessary to define an appropriate range for the target weight value, and the minimum target candidate Based on the input means for inputting in advance weighing setting information composed of information not including target candidate values other than the value, the weight value of the object to be weighed by the weighing means, and the weighing setting information A calculation means for deriving a target weight value corresponding to the weight value of the object to be weighed equal to any one of the target candidate values, and deriving an appropriate amount range corresponding to the target weight value; and the weighing means In A weight value judging means for judging whether or not a weight value of an object to be weighed is a value within the appropriate amount range, a notifying means for notifying a judgment result by the weight value judging means, and a computing means. Display means for displaying the derived target weight value.

  According to this configuration, only by setting in advance a minimum target candidate value among a plurality of target candidate values that can be a plurality of target weight values, according to the weight value of the object to be weighed placed on the placement unit. Since different target weight values can be derived, less information needs to be set when used for the production of a plurality of types of products having different target weight values, and the setting work is simplified.

  As the metric setting information, by the input means, the minimum target candidate value that is the first term and tolerance of the plurality of target candidate values forming an arithmetic progression, and an allowable value indicating the size of the appropriate amount range or the allowable value Only the appropriate amount range demarcating information consisting of values necessary for calculating the value, and the calculation means is a predetermined calculation derived from the plurality of target candidate values forming the arithmetic progression. A target weight value is calculated based on the formula, the minimum target candidate value, and the weight value of the object to be weighed by the weighing means, and this target weight value is determined as the lower limit value of the appropriate amount range. A value obtained by adding the allowable value to the value may be determined as an upper limit value of the appropriate amount range, and the appropriate amount range may be derived.

  According to this configuration, since the target weight value (corresponding to one target candidate value) is calculated when the operator is performing the weighing operation, target candidate values other than the minimum target candidate value are stored. There is no need.

  As the metric setting information, the input means calculates tolerances of the plurality of target candidate values forming an equidistant sequence, the minimum target candidate values, and an allowable value or an allowable value indicating the size of the appropriate amount range. Only the appropriate amount range demarcating information consisting of the values necessary for the input, and the calculating means, a predetermined calculation formula derived from the plurality of target candidate values forming the arithmetic progression, A target weight value is calculated based on a tolerance of the plurality of target candidate values, the minimum target candidate value, and a weight value of an object to be weighed by the weighing means, and the target weight value is calculated within the appropriate amount range. The lower limit value may be determined, and a value obtained by adding the allowable value to the lower limit value may be determined as the upper limit value of the appropriate amount range to derive the appropriate amount range.

  According to this configuration, since the target weight value (corresponding to one target candidate value) is calculated when the operator is performing the weighing operation, target candidate values other than the minimum target candidate value are stored. There is no need.

  The calculation means derives the appropriate amount range with respect to the derived target weight value, and is an overdose range that is a range that exceeds the upper limit value of the appropriate amount range and a light weight that is a range that is less than the lower limit value of the appropriate amount range. In this case, when the plurality of target candidate values are arranged in ascending order, the nth (n is a positive integer) target candidate value becomes the target weight value, and the n + 1th The overweight range with respect to the derived target weight value and the light weight range are derived so that the light weight range when the target candidate value becomes the target weight value is continuous without overlapping, and the weight value determination The means is configured to determine whether the weight value of the object to be weighed by the weighing means is a value within the appropriate range, the overdose range, or the lightweight range derived by the calculation unit. And Good.

  According to this configuration, when the weight value of the object to be weighed is not an appropriate amount, it is also notified whether the object is light or excessive, so that the weighing operation is facilitated.

  The calculation means obtains the weight value of the object to be weighed from the weighing means at predetermined time intervals, and the nth target candidate value when the weight value acquired this time is larger than the weight value acquired last time is the target The first boundary value, which is the boundary value between the overweight range in the case of the weight value and the lightweight range in the case where the (n + 1) th target candidate value becomes the target weight value, is acquired this time from the previously acquired weight value. This is a boundary value between an overdose range when the nth target candidate value is a target weight value and a light weight range when the n + 1th target candidate value is a target weight value when the weight value is small. You may be comprised so that it may be a larger value than a 2nd boundary value.

  According to this configuration, an object to be weighed is near a boundary value between an overdose range when the nth target candidate value is the target weight value and a lightweight range when the n + 1th target candidate value is the target weight value. Even if the weight value is unstable and unstable, the target weight value displayed on the display means does not vary, and the judgment result (light weight, excessive amount) reported by the reporting means also does not vary. Work becomes easier.

  A target weight value switching range, which is a predetermined value, is set in advance, and the calculation means sets the first boundary value as a half of the sum of the nth target candidate value and the n + 1th target candidate value. The target weight value switching width is added to 1 and the previous second boundary value is set to one half of the sum of the nth target candidate value and the n + 1th target candidate value. A value obtained by subtracting the value switching width may be used.

  The calculation means pre-calculates target candidate values other than the minimum target candidate value based on the measurement setting information when the measurement setting information is input by the input means, and stores all the target candidate values in advance. And selecting the target candidate value closest to the weight value of the object to be weighed from among the plurality of target candidate values stored when the object to be weighed is measured by the weighing means. The target weight value may be determined.

  An operation means for fixing the target weight value and releasing the fixation is further provided. When an operation for fixing the target weight value is performed on the operation means, the calculation means at the time of the operation performs the target object. It is fixed to the target weight value and appropriate amount range derived based on the weight value of the object to be measured and the measurement setting information, and the calculation means newly sets the target weight value and appropriate amount range until this fixed release operation is performed. The derivation may not be performed.

  According to this configuration, for example, when products having the same target weight value (A) are continuously produced, an operator places an object to be weighed on the placement unit and the target weight value (A) is displayed on the display means. If the target weight value (A) is fixed by operating the operating means when displayed, the weight value of the object to be weighed thereafter depends on the target weight value (B) other than the target weight value (A). Even if the value reaches the target value, the target weight value (B) is not displayed, and the determination result such as whether or not the target weight value (B) is an appropriate amount is not notified. Thereby, the operator can produce the product of the target weight value (A) without trouble, and the weighing work in this case becomes easy.

  The present invention has the above-described configuration, and in the weighing device used for the production of a plurality of types of products having different target weight values, setting of information necessary for weighing objects to be weighed as those products There is an effect that the work is simplified.

FIG. 1A is an external view illustrating an example of a weighing device according to an embodiment of the present invention, and FIG. 1B is a block diagram illustrating a configuration of the weighing device in FIG. FIG. 2 is a diagram showing an example of the relationship between the weight value of the object to be weighed and a plurality of target candidate values. FIGS. 3A to 3F are diagrams illustrating examples of operation states of the display unit and the determination lamp of the weighing device in the quantitative weighing mode. FIG. 4 is a flowchart showing an example of the operation in the quantitative weighing mode of the weighing device of the present embodiment.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the following description, the same or corresponding elements are denoted by the same reference symbols throughout all the drawings, and redundant description thereof is omitted. Further, the present invention is not limited to the following embodiment.

(Embodiment)
FIG. 1A is an external view illustrating an example of a weighing device according to an embodiment of the present invention, and FIG. 1B is a block diagram illustrating a configuration of the weighing device in FIG.

  This weighing device includes a weighing unit 11, a main body 15, and a controller 20. This weighing device is used to produce a product with a fixed amount of objects to be weighed (for example, packed with tea or coffee beans), for example, when producing products with different weights such as 200 g, 400 g, 600 g, etc. Useful for.

  The weighing unit 11 supports a weighing pan (mounting unit) 12 on which an object to be weighed is placed, and a weight sensor 13 such as a load cell that supports the weighing pan 12 and measures the weight of the object to be weighed on the weighing pan 12. Etc. The weight sensor 13 is connected to the controller 20 via a well-known signal processing circuit (not shown) (for example, an amplifier or an A / D converter). Thereby, the weight of the object to be weighed on the weighing pan 12 is calculated by the controller 20 based on the weighing signal from the weight sensor 13. The weight sensor 13 and the controller 20 are stored in the housing of the main body 15.

  The main body 15 includes an operation unit 16, a display unit (display unit) 17, and a determination lamp (informing unit) 18 on the front surface. The operation unit 16 is composed of a plurality of switches and the like, and controls the operation means for starting and stopping the operation of the weighing device, and the values of the operation conditions (for example, measurement setting information described later) of the weighing device. It functions as an input means for inputting to 20 in advance. That is, by using the operation unit 16, various input signals due to the operation of the operation unit 16 are input to the controller 20 and stored in the storage unit of the controller 20 as necessary. The display unit 17 is configured by using, for example, a small liquid crystal display, and displays the weight of the object to be measured calculated by the controller 20. The determination lamp 18 is configured using, for example, a multicolor LED, and can change the lighting color.

  The controller 20 is composed of, for example, a microcontroller and has a calculation unit including a CPU of the microcontroller and a storage unit including a RAM and a ROM of the microcontroller.

  The controller 20 inputs signals from the weight sensor 13 and the operation unit 16, outputs signals such as data to be displayed on the display unit 17, and controls the determination lamp 18. The controller 20 functions as a calculation unit, a weight value determination unit, and the like, and also functions as a weighing unit that measures the weight of the object to be weighed placed on the weighing pan 12 together with the weight sensor 13. The controller 20 may be composed of a single controller that performs centralized control, or may be composed of a plurality of controllers that perform distributed control in cooperation with each other.

  The operation of the weighing device configured as described above will be described. The operation of the weighing device is controlled by the controller 20, and all information necessary for operating the weighing device is stored in the storage unit of the controller 20, and all information stored during the operation is stored in the controller. It is stored in 20 storage units. In this measuring device, for example, the weighing capacity is 3000 g and the scale weight is 1 g.

  The weighing device can be switched to a setting mode, a normal weighing mode, and a quantitative weighing mode by the user operating the operation unit 16. The normal weighing mode is a mode for weighing the object to be weighed, and the quantitative weighing mode is a mode for producing a quantitatively packed product. Here, the quantitative measurement mode and the setting mode related thereto will be described.

  Before weighing in the quantitative weighing mode, a user such as an operator or an administrator operates the operation unit 16 to select the setting mode before starting the weighing, and in the setting mode, it is necessary for the quantitative weighing mode. Information, that is, information necessary for weighing an object to be weighed as a fixed quantity product to be produced (measurement setting information) is input in advance.

  For example, a case will be described in which fixed quantity products such as 200 g, 400 g, and 600 g, that is, a plurality of types of fixed quantity products whose target weight value (hereinafter referred to as “target value”) is a multiple of 200 g, are described.

  In the fixed quantity product, an appropriate amount range that is an allowable range for the target value is determined. For example, in the case of a 200 g fixed quantity product, by setting the target value as 200 g and the allowable value (Q), which is information necessary for defining the appropriate amount range, as 10 g, for example, the appropriate range is 200 g or more and 210 g. In the following, a product composed of an object to be weighed of 200 g or more and 210 g or less is produced as a 200 g fixed quantity product. That is, in this example, the lower limit value of the appropriate amount range is determined as a target value, and the upper limit value of the appropriate amount range is determined as (target value + allowable value).

  Here, in the present embodiment, a multiple of 200 g such as 200 g, 400 g, 600 g, and the like is an example of a target candidate value that can be a target value, and a minimum target candidate value (200 g) that is the minimum value among the plurality of target candidate values. ) And an allowable value Q (10 g) are input in advance as measurement setting information.

  FIG. 2 shows the relationship between the weight value of the object to be weighed and a plurality of target candidate values in this case.

  Since the weighing device of this example has a weighing capacity of 3000 g, FIG. 2 shows weight values in the range of 0 to 3000 g. In addition, since the weighing device of this example has a graduation of 1 g, the weight such as the weight value (W) of the object to be weighed will be considered in units of 1 g. For example, it is assumed that the weight value W of the object to be weighed is calculated in units of 1 g by rounding off less than 1 g.

  In FIG. 2, m1 (200 g), m2 (400 g), m3 (600 g),..., M14 (2800 g) are target candidate values. In addition, F1, F2, F3,..., F14 are appropriate amount ranges when the target candidate values m1, m2, m3,. Further, L1, L2, L3,..., L14 are light weight ranges when the target candidate values m1, m2, m3,. Further, H1, H2, H3,..., H14 are overdose ranges when the target candidate values m1, m2, m3,.

  Therefore, M1, M2, M3,..., M14 are target value-related ranges (light weight range, appropriate amount range, and m14) when the target candidate values m1, m2, m3,. Over range).

  For example, when the target candidate value m1 (200 g) becomes the target value, the light weight range L1 is 1 g ≦ L1 ≦ 199 g, the appropriate amount range F1 is 200 g ≦ F1 ≦ 210 g, and the overdose range H1 is 211 g ≦ H1 ≦ 299 g. The target value related range M1 is 1 g ≦ M1 ≦ 299 g.

  When the target candidate value m2 (400 g) becomes the target value, the light weight range L2 is 300 g ≦ L2 ≦ 399 g, the appropriate amount range F2 is 400 g ≦ F2 ≦ 410 g, and the overdose range H2 is 411 g ≦ H2 ≦ 499 g. The target value related range M2 is 300 g ≦ M2 ≦ 499 g.

Thus, in this example, when the target candidate value mt (m2 to m13, that is, t is 2 to 13) is the target value,
The light weight range Lt is (200 × t−100) g ≦ Lt ≦ (200 × t−1) g,
The appropriate amount range Ft is (200 × t) g ≦ Ft ≦ (200 × t + 10) g,
The overdose range Ht becomes (200 × t + 11) g ≦ Ht ≦ (200 × t + 99) g,
The target value related range Mt is (200 × t−100) g ≦ Mt ≦ (200 × t + 99) g.

  When the target candidate value m14 (2800 g) is the target value, the light weight range L14 is 2700 g ≦ L14 ≦ 2799 g, the appropriate amount range F14 is 2800 g ≦ F14 ≦ 2810 g, and the overdose range H14 is 2811 g ≦ H14 ≦ 3000 g, The target value related range M14 is 2700 g ≦ M14 ≦ 3000 g.

  The maximum target candidate value (in this example, m14 = 2800 g) is determined so as to satisfy that the upper limit value of the appropriate amount range corresponding to the target value is less than the maximum capacity when it reaches the target value. It is done.

  Here, in the target candidate values m1 to m14, the overdose range H (n) in the case where the nth (n is 1 to 13) target candidate value m (n) counted from the smaller value becomes the target value, When the n + 1th target candidate value m (n + 1) is the target value, the boundary value with the lightweight range L (n + 1) is defined as the nth target candidate value m (n) and the n + 1th target candidate value m (n + 1). And half of the sum. For example, the boundary value between the excess amount range H1 when the first target candidate value m1 is the target value and the lightweight range L2 when the second target candidate value m2 is the target value is (200 + 400) / 2 = 300 (g). In this example, the boundary value of 300 g is set as the lower limit value of the light weight range L2 when 400 g is set as the target value, but may be set as the upper limit value of the overdose range H1 when 200 g is set as the target value. Good.

  In this manner, the excess amount range when the nth target candidate value becomes the target value and the light weight range when the n + 1th target candidate value becomes the target value are determined to be continuous without overlapping. . In this example, the lower limit value of the lightweight range L1 when the first target candidate value m1 having the smallest value is the target value is set to 1 g, but a predetermined value larger than 1 g (for example, accurate measurement) May be the minimum measured amount).

  For example, the controller 20 calculates a weight value (W) of an object to be weighed placed on the weighing pan 12 based on a weighing signal from the weight sensor 13 that is sequentially acquired at predetermined time intervals in the quantitative weighing mode. A target value is calculated based on the weight value W (a method for calculating the target value will be described later), and an appropriate amount range, a light weight range, and an overdose range corresponding to the target value are calculated as described above. When the weight value W of the object to be weighed is a value within the appropriate amount range, it is determined as an appropriate amount, when it is within the light weight range, it is determined as light (small amount), and when it is within the over amount range, it is determined as an excessive amount. To do.

  3A to 3F show the weighing device in the quantitative weighing mode when the minimum target candidate value is set to 200 g and the allowable value Q is set to 10 g as the weighing setting information as in the above example. It is a figure which shows an example of the operation state of the display part 17 of this and the determination lamp. The display unit 17 displays a target value at the lower left of the screen, an allowable value at the lower right of the screen, and an excess / deficiency amount of the weight value W relative to the target value (hereinafter simply referred to as “excess / deficiency”) at the upper right of the screen Yes. The excess / deficiency amount is calculated by the controller 20 subtracting the target value from the weight value W.

  FIG. 3A shows a state of no load (weight value W = 0 g) when an object to be weighed is not placed on the weighing pan 12, and the determination lamp 18 is turned off. In this no-load example, the display unit 17 displays the minimum target candidate value as the target value, but the present invention is not limited to this. Further, the display items of the display unit 17 at the time of no load may be arbitrarily changed. For example, you may make it display the average value etc. of the weight value of the to-be-measured object measured until then.

  FIG. 3B shows a state when an object to be weighed having a weight value W of 182 g is placed on the weighing pan 12. In this case, the controller 20 calculates the target value as 200 g and displays it on the display unit 17, calculates “−18” g which is the excess / deficiency with respect to this 200 g, and displays it on the display unit 17. Further, the controller 20 determines that the weight is light, and turns on the determination lamp 18 in red. As a result, the worker adds an object to be weighed.

  FIG. 3C shows a state where an object to be weighed is further added to the weighing pan 12 and the weight value W reaches 201 g. In this case, the controller 20 calculates the target value as 200 g and displays it on the display unit 17, calculates “1” g which is an excess / deficiency with respect to this 200 g, and displays it on the display unit 17. Further, the controller 20 determines that the amount is appropriate, and turns on the determination lamp 18 in blue. Thereby, when an operator produces a 200 g stuffed product, all the objects to be weighed are taken out from the weighing pan 12 and placed in a bag or a container.

  FIG. 3D shows a state when an object to be weighed having a weight value W of 232 g is placed on the weighing pan 12. In this case, the controller 20 calculates the target value as 200 g and displays it on the display unit 17, calculates “32” g which is the excess / deficiency with respect to this 200 g, and displays it on the display unit 17. Further, the controller 20 determines that the amount is excessive, and lights the determination lamp 18 in yellow. Thereby, an operator takes out a part of an item to be weighed from the weighing pan 12 when producing a 200-g stuffed product. On the other hand, an object to be weighed is added to the weighing pan 12 when producing a 400 g stuffed product.

  FIG. 3 (E) shows a state where, for example, an object to be weighed is further added to the weighing pan 12 from the state of FIG. 3 (D), and the weight value W reaches 388 g. In this case, the controller 20 calculates the target value as 400 g and displays it on the display unit 17, calculates “−12” g which is the excess / deficiency with respect to 400 g and displays it on the display unit 17. Further, the controller 20 determines that the weight is light, and turns on the determination lamp 18 in red. As a result, the worker adds an object to be weighed.

  FIG. 3F shows a state where an object to be weighed is further added to the weighing pan 12 and the weight value W reaches 401 g. In this case, the controller 20 calculates the target value as 400 g and displays it on the display unit 17, calculates “1” g which is the excess / deficiency with respect to 400 g and displays it on the display unit 17. Further, the controller 20 determines that the amount is appropriate, and turns on the determination lamp 18 in blue. As a result, when producing 400 g-packed goods, the operator takes out all objects to be weighed from the weighing pan 12 and puts them in bags or containers.

  In addition, in the above, when adding or taking out a part to be weighed, it can be performed with reference to the excess / deficiency displayed on the display unit 17. Moreover, instead of performing addition of a to-be-measured item and taking out a part, depending on the kind of to-be-measured item, the placement of the to-be-measured item may be performed.

  When the weight value W of the object to be weighed is within the target value related range M1 when the target value is 200 g as shown in FIGS. 200 g is displayed as the target value, and the excess / deficiency with respect to the target value is displayed. Further, as shown in FIGS. 3E and 3F, when the weight value W of the object to be weighed is within the target value related range M2 when the target value is 400 g, the display unit 17 400 g is displayed as the target value, and the excess / deficiency with respect to the target value is displayed. Then, as shown in FIGS. 3B to 3F, the determination result of the appropriate amount, light weight, and excessive amount with respect to the displayed target value of the weight value W is notified by the lighting color of the determination lamp 18.

  FIG. 4 is a flowchart showing an example of the operation in the quantitative weighing mode of the weighing device of the present embodiment. This operation is realized by processing of the controller 20.

  In step S1, when the quantitative measurement mode is selected by the operation of the operation unit 16 by the operator, the controller 20 starts the quantitative measurement mode based on the measurement setting information. Here, for example, the screen display of the display unit 17 is set to the state shown in FIG. Note that a plurality of pieces of measurement setting information may be set in advance, and in this case, one piece of measurement setting information to be used is also selected by operating the operation unit 16.

  Thereafter, the worker performs a weighing operation. In this weighing operation, the operator places an object to be weighed on the weighing pan 12, the target value displayed on the display unit 17 is a desired value, and the determination lamp 18 is lit in blue (in the case of an appropriate amount). In addition, all the objects to be weighed are taken out from the weighing pan 12 and put into bags or containers to produce one product. Similarly, the next product is produced. When the target value is different from the desired value, or when the judgment lamp 18 is red (light weight) or yellow (overweight), an object to be weighed is added or a part is taken out as described above. Or

  In step S2, the controller 20 calculates the weight value W of the object to be weighed on the weighing pan 12 based on the weighing signal of the weight sensor 13 that is sequentially acquired at predetermined time intervals.

  In step S3, it is determined whether an object to be weighed is placed on the weighing pan 12 based on the weight value W calculated in step S2. For example, when the weight value W is 0 g, it is determined that an object to be weighed is not placed, and when the weight value W is 1 g or more, it is determined that the object is placed.

  When it is determined in step S3 that an object to be weighed is placed, the process proceeds to step S4, a target value corresponding to the weight value W is calculated, and the target value is subtracted from the weight value W to calculate an excess / deficiency amount.

  For example, when the minimum target candidate value (for example, m1 in FIG. 2) is M, an integer value k obtained by rounding off the decimal point of the W / M value is calculated, and further, a value of k × M (target One of the candidate values) is calculated, and this value is determined as the target value.

  The integer value k is a value indicating that the kth target candidate value becomes the target value when a plurality of target candidate values (for example, m1 to m14 in FIG. 2) are arranged in ascending order. Therefore, when the integer value k calculated by the above-described calculation method becomes 0 (that is, when 0 <W / M <0.5), the integer value k is forcibly determined to be 1. In the case of FIG. 2, the upper limit value of k is 14.

  Next, in step S5, an appropriate amount range, a light weight range, and an overdose range are calculated. These calculation methods are, for example, as described above with reference to FIG. For example, the appropriate amount range is derived by setting the lower limit value as a target value (value of k × M), and determining a value obtained by adding the allowable value Q to the lower limit value as the upper limit value of the appropriate amount range.

  Next, in step S6, when the weight value W is a value within the appropriate amount range, it is determined to be an appropriate amount, when it is within the light weight range, it is determined to be light (small amount), and when it is within the excessive amount range, an over amount is determined. judge.

  Then, the controller 20 causes the display unit 17 to display the target value calculated in step S4, the excess / deficiency amount, and the like, and to turn on the determination lamp 18 with a lighting color corresponding to the determination result in step S6 (steps S7 and S8). ), The process returns to step S2. Step S7 may be a step after step S4.

  If it is determined in step S3 that the object to be weighed is not placed on the weighing pan 12, the process proceeds to step S9. If the determination lamp 18 is lit, the display lamp 17 is turned off and the display unit 17 is displayed in the initial display state (for example, FIG. 3). Return to the state of (A).

  In addition, as the measurement setting information, instead of the allowable value Q, an allowable rate q for calculating the allowable value may be set. Here, if the permissible rate q is, for example, the ratio to the minimum target candidate value expressed as a percentage, the minimum target candidate value is set to 200 g, and the allowable rate is set to 5%, the above-described allowable value Q is set to 10 g. Is the same as

  On the other hand, the allowable rate q may be expressed as a percentage of the target value. In this case, the allowable value varies depending on the calculated target value. For example, when the minimum target candidate value is set to 200 g and the allowable rate q is set to 5%, the target value is set to 200 g which is the same as the minimum target candidate value. In this case, the allowable value is 10 g, but when the target value is 400 g, the allowable value is 20 g.

  The allowable value Q and the allowable rate q are examples of information necessary for defining an appropriate amount range for the target value, that is, appropriate amount range defining information.

  In this example, 200 g is set as the minimum target candidate value. However, for example, when 100 g is set, multiples of 100 g such as 100 g, 200 g, and 300 g are target candidate values that can become target values. In this way, a plurality of pieces of measurement setting information having different minimum target candidate values and appropriate amount range defining information can be set. In any case, the plurality of target candidate values are an equidistant sequence with the minimum target candidate value as the first term and the minimum target candidate value as a tolerance.

  As described above, the target value corresponding to the weight value W can be obtained by simply setting one minimum target candidate value and appropriate range defining information (allowable value Q or allowable rate q) as the weighing setting information. Since it is calculated and a determination is made as to whether the target value is appropriate, lightweight or overdose, it is notified, so it is possible to measure multiple types of products with different target values simply by setting one weighing setting information. Can weigh things.

  In the conventional weighing device, the target value and the appropriate amount range defining information have to be set for each different product, that is, for each different target value. For example, in the case of producing three types of products packed in 200 g, 400 g, and 600 g, it is necessary to set three target values of 200 g, 400 g, and 600 g, and appropriate range defining information for each target value. On the other hand, in the weighing apparatus of this example, it is sufficient to set one minimum target candidate value and appropriate amount range defining information, so that less information is set and the setting operation is simplified.

  For example, in a retail store or the like, for example, when selling coffee beans in bags of 200 g, 300 g, 400 g, etc. in units of 100 g, the minimum target candidate value may be set to 100 g. This setting device is useful because the complexity of setting operation can be eliminated.

  In addition, for example, in department store basements (grocery departments on the basement floors of department stores), sugar beets are sold with an indication of several yen per 100 g, and orders of 100 g, 200 g, 300 g, etc. are received from shoppers. It is convenient to use this weighing device when measuring and selling after receiving the product.

[Other examples of measurement setting information]
As another example of the measurement setting information and the like, the minimum target candidate value (the first term of the above difference number sequence) M, which is the minimum value of the plurality of target candidate values forming the difference number sequence, and the tolerance (adjacent to the above difference number sequence) The interval between target candidate values) d and the above-described allowable value Q or allowable rate q may be set. For example, if the minimum target candidate value M is set to 200 g and the tolerance d is set to 50 g, 200 g, 250 g, 300 g, 350 g, and the like become target candidate values.

  In this case, the target value corresponding to the weight value W of the object to be weighed in step S4 can be calculated as follows, for example.

  For example, an integer value k obtained by rounding off the decimal point of the value of (W−M + d) / d is calculated, and further, a value of (k−1) × d + M (one of target candidate values) is calculated, This value may be determined as a target value.

  Again, the integer value k is a value indicating that the kth target candidate value becomes the target value when a plurality of target candidate values are arranged in ascending order. Therefore, when the integer value k calculated by the above-described calculation method is 0 or less (that is, (W−M + d) / d <0.5), the integer value k is forcibly determined to be 1.

  Also in this case, the appropriate amount range, the light weight range, and the overdose range can be calculated in the same manner as described above.

  In the above example, one of the target candidate values is calculated during measurement and determined as the target value. However, when the measurement setting information is set by operating the operation unit 16, the controller 20 All target candidate values may be calculated and stored in advance. In the quantitative weighing mode, a target candidate value closest to the weight value W calculated during weighing is selected from all target candidate values, and the selected target candidate value is set as the target value. Good. Furthermore, when the measurement setting information is set by operating the operation unit 16, the controller 20 calculates and stores in advance all target candidate values, and each target candidate value becomes a target value. An appropriate amount range may be stored in advance, and further, a lightweight range and an overdose range may be stored in advance. However, as in the above example, if the target candidate value or the like that becomes the target value during measurement is calculated, the storage capacity of the controller 20 can be reduced, and the manufacturing cost can be reduced.

  Further, in the above example, the plurality of target candidate values form an arithmetic progression, but may be configured to form an geometric progression. For example, a plurality of target candidate values may form a geometric sequence such as 50 g, 100 g, 200 g, 400 g,. In this case, as the metric setting information, the minimum target candidate value (50 g in the above example of the ratio sequence), the common ratio r of the ratio sequence (r = 2 in the example of the ratio sequence), and the allowable value Q described above. Alternatively, the allowable rate q may be set.

[Summary of multiple target candidate values and weighing setting information]
(1) When a plurality of target candidate values form an arithmetic sequence having the same tolerance as the first term, the minimum target candidate value (= first term = tolerance) and the allowable value Q or the allowable value are set as the measurement setting information. The rate q is set.

  (2) When a plurality of target candidate values form an arithmetic progression, the minimum target candidate value (= first term), tolerance d, and allowable value Q or allowable rate q are set as measurement setting information. .

  (3) When a plurality of target candidate values form a geometric sequence, the minimum target candidate value (= first term), the common ratio r, and the allowable value Q or the allowable rate q are set as the measurement setting information. To do.

  In the case of (2) above, if the minimum target candidate value (= first term) and the tolerance d are set to the same value, a plurality of target candidate values have the first term and tolerance as in the case of (1). It is possible to form an arithmetic sequence that is the same.

  Here, the weighing device is configured to be able to set measurement setting information in at least one of the above (1), (2), and (3), and to calculate a target candidate value corresponding to the setting information. Just do it.

  For example, when the measurement setting information in all the cases (1), (2), and (3) can be set and the target candidate value can be calculated according to the measurement setting information, for example, in the setting mode The minimum target candidate value, the tolerance d, the tolerance ratio r, and the appropriate range defining information (allowable value Q or allowable rate q) can be set by operating the operation unit 16. However, the tolerance d and the tolerance ratio r cannot be set at the same time.

  When the minimum target candidate value and the appropriate amount range defining information are input by the operation of the operation unit 16 and the tolerance d and the tolerance ratio r are not input, the controller 20 sets the measurement setting in the case of (1). What is necessary is just to recognize as information. Further, when the minimum target candidate value, the tolerance d, and the appropriate amount range defining information are input, the controller 20 recognizes it as the metric setting information in the case of (2), and the minimum target candidate value and the common ratio are recognized. When r and the appropriate amount range defining information are input, the controller 20 may recognize the measurement setting information in the case of (3). The appropriate range defining information may be configured so that, for example, only one of the allowable value Q and the allowable rate q can be set, or one selected from the allowable value Q and the allowable rate q is set. It may be configured to.

  By setting the measurement setting information to the setting mode, information necessary for setting is displayed on the display unit 17, and a person can operate the operation unit 16 while setting it to set it in the controller 20. It is configured to be able to. In addition, when the operator or the like selects the desired measurement setting information in the quantitative measurement mode, the measurement device operates based on the selected measurement setting information.

(Modification 1)
As described above, the controller 20 calculates the weight value W of the object to be weighed in units of 1 g at predetermined time intervals based on the weighing signal from the weight sensor 13. Here, for example, an appropriate amount range (F1 to F14), an overdose range (H1 to H14), a light weight range (L1 to L14), and the like when the target candidate values (m1 to m14) are set as target values as shown in FIG. If the weight value W of the object to be weighed is not stable due to the influence of, for example, the installation state of the weighing device or the wind, and changes alternately between 299 g and 300 g, for example, the display unit The displayed target value of 17 is alternately switched between 200 g and 400 g, and the lighting color of the judgment lamp 18 is yellow (overdue notification color when the target value is 200 g) and red (lightweight when the target value is 400 g). The notification color flickers alternately, making it difficult for the operator to perform the weighing operation (product production operation).

  Therefore, in the first modification, a target value switching width (target weight value switching width) s consisting of a predetermined value is set, and the weight value W of the object to be weighed acquired at predetermined time intervals is larger than the weight value acquired last time. When the weight value acquired this time becomes large, the excess amount range H (n) when the nth target candidate value m (n) is the target value counted from the smaller value, and the (n + 1) th target candidate value. The boundary value (X1) with the lightweight range L (n + 1) when m (n + 1) is the target value is the sum of the nth target candidate value m (n) and the n + 1th target candidate value m (n + 1). The value obtained by adding the target value switching width s to one half of.

  On the other hand, when the weight value acquired this time becomes smaller than the weight value acquired last time, the overload range H (n) when the nth target candidate value m (n) becomes the target value, and the n + 1th target. When the candidate value m (n + 1) is the target value, the boundary value (X2) with the lightweight range L (n + 1) is expressed as the nth target candidate value m (n) and the n + 1th target candidate value m (n + 1). The value obtained by subtracting the target value switching width s to one half of the sum of

  For example, when the target value switching width s is set to 5 g, when the weight value acquired this time is larger than the weight value acquired last time, the first target candidate value m1 (200 g) is the target value. The boundary value X1 between the overdose range H1 in this case and the light weight range L2 in the case where the second target candidate value m2 (400 g) is the target value is (200 + 400) / 2 + 5 = 305 (g). This boundary value X1 (305 g) is set as the lower limit value of the light weight range L2 when 400 g is set as the target value, or the upper limit value of the excess amount range H1 when 200 g is set as the target value.

  On the other hand, when the weight value acquired this time is smaller than the weight value acquired last time, the overdose range H1 when the first target candidate value m1 (200 g) is the target value and the second target candidate value m2 ( When the target value is 400g), the boundary value X2 with the light weight range L2 is (200 + 400) / 2-5 = 295 (g). This boundary value X2 (295 g) is set as the lower limit value of the light weight range L2 when 400 g is set as the target value, or the upper limit value of the overdose range H1 when 200 g is set as the target value.

  Here, the boundary value X1 (305 g) when the weight value W increases is set as the lower limit value of the lightweight range L2 when 400 g is the target value, and the boundary value X2 (295 g) when the weight value W decreases is , 400 g is set as the lower limit value of the light weight range L2 when the target value is used.

  In this case, for example, when the weight value W fluctuates between 304 g and 305 g in the vicinity of the boundary value X1, when the weight value W increases and first reaches 305 g equal to or greater than the boundary value X1. , 400 g becomes a target value, and is determined to be lightweight. Thereafter, even if the weight value W decreases to 304 g, 304 g is equal to or greater than the boundary value X2 (295 g), so the target value remains 400 g and the determination result remains light.

  For example, when a part of the object to be weighed is taken out from the weighing pan 12 and the weight value W fluctuates between 294 g and 295 g near the boundary value X2, the weight value W decreases. When it reaches 294 g for the first time, 200 g becomes the target value, and it is determined that the amount is excessive. After this, even if the weight value W increases to 295 g, since 295 g is less than the boundary value X1 (305 g), the target value remains 200 g and the determination result also remains excessive.

  As described above, for example, by setting the target value switching width s so that the boundary value X1 is larger than the boundary value X2, the weight value W of the object to be weighed is not stabilized near the boundary value. Even if it is unstable, the target value displayed on the display unit 17 is not changed, the determination result (light weight, excessive amount) is not changed, the lighting color of the determination lamp 18 is not changed, and the weighing operation is easy. Become.

  Note that the values of the boundary value X1 and the boundary value X2 are not limited to the above example, and the boundary value X1 when the weight value W increases and the target value increases, and the target value decreases as the weight value W decreases. If the value is larger than the boundary value X2 in this case, the above effect can be obtained. For example, the boundary value X1 is a value obtained by adding the target value switching width s to one half of the sum of the nth target candidate value m (n) and the n + 1th target candidate value m (n + 1), and the boundary value X2 may be set to half of the sum of the nth target candidate value m (n) and the n + 1th target candidate value m (n + 1). Further, the boundary value X1 is set to one half of the sum of the nth target candidate value m (n) and the n + 1th target candidate value m (n + 1), and the boundary value X2 is set to the nth target candidate value m. A value obtained by subtracting the target value switching width s from one half of the sum of (n) and the (n + 1) th target candidate value m (n + 1) may be used.

  Note that the target value switching width s may be configured such that, for example, in a setting mode, an operator or the like can set a desired value or a predetermined value to the controller 20 by operating the operation unit 16. Alternatively, a predetermined value may be set in the controller 20 in advance.

(Modification 2)
In the second modification, for example, the operation unit 16 is provided with a target value fixing and release switch, and by pressing the switch during measurement, the target value and the appropriate amount range derived at the time of operation are fixed, and again. By pressing the switch, the target value and the appropriate range are released. Note that, by fixing the target value, the appropriate amount range is also fixed.

  For example, when each target candidate value etc. is decided like FIG. 2, the case where two 200g stuffing goods and 10 400g stuffing goods are produced is considered. In this case, for example, after producing two 200 g-packed products and subsequently producing 400 g-packed products, when 400 g is displayed as the target value on the display unit 17, the above switch is pressed and the target value and If the appropriate amount range is fixed, a target value other than 400 g, for example, display of a target value of 200 g on the display unit 17, and a determination lamp for each lighting color by light weight, appropriate amount, and excessive amount determination when 200 g is set as the target value There is no 18 lighting. As a result, the operator can work to continuously produce 400 g-packed products without any trouble, and it is also possible to prevent a product such as 200 g from being accidentally produced during the production of 400 g-packed products.

  In this case, for example, when the target value is fixed at 400 g, a range (1 g to 399 g) less than the lower limit value of the appropriate amount range (1 g to 399 g) is set as the lightweight range, and a range exceeding 410 g of the upper limit value of the appropriate amount range ( 411g to 3000g) may be set as an excessive amount range, and the lighting color of the determination lamp 18 may be controlled.

  In the above embodiment, the determination lamp 18 is used to notify the operator of the determination result of an appropriate amount, light weight, and excessive amount. However, the present invention is not limited to this, and other methods may be used as long as the determination result can be notified to the operator. . For example, a buzzer may be provided, and the determination result of an appropriate amount, a light weight, and an excessive amount may be notified by changing the buzzer sound. Moreover, you may make it alert | report by an audio | voice. Further, the display unit 17 displays characters or the like (for example, “appropriate amount”, “light weight”, “overdose” characters) on the display unit 17 or uses the bar graph to determine the appropriate amount, light weight, and overdose. You may make it display and alert | report. In addition, for example, a buzzer may be provided, and the buzzer is sounded only when the amount is appropriate, or the buzzer is sounded only when the amount is light and excessive, so as to notify whether the amount is appropriate.

  From the foregoing description, many modifications and other embodiments of the present invention are obvious to one skilled in the art. Accordingly, the foregoing description should be construed as illustrative only and is provided for the purpose of teaching those skilled in the art the best mode of carrying out the invention. The details of the structure and / or function may be substantially changed without departing from the spirit of the invention.

  INDUSTRIAL APPLICABILITY The present invention is useful as a weighing device that is used for the production of a plurality of types of products having different target weight values, and that makes it easy to set information necessary for weighing objects to be weighed as those products.

DESCRIPTION OF SYMBOLS 11 Weighing part 12 Weighing pan 13 Weight sensor 15 Main body 16 Operation part 17 Display part 18 Determination lamp 20 Controller m1-m14 Target candidate value F1-F14 Appropriate amount range L1-L14 Light weight range H1-H14 Excess amount range

Claims (8)

A weighing means for weighing the object to be weighed placed on the placing portion;
The minimum target candidate value that is the minimum value among a plurality of target candidate values that can form the target weight value by forming an equality number sequence or a geometric ratio number sequence, and information necessary for defining an appropriate amount range for the target weight value. Input means for preliminarily inputting measurement setting information including information including an appropriate amount range defining information and not including a target candidate value other than the minimum target candidate value;
Based on the weight value of the object to be weighed by the weighing means and the measurement setting information, the target weight corresponding to the weight value of the object to be measured is equal to any one of the plurality of target candidate values. A computing means for deriving a value and deriving an appropriate amount range corresponding to the target weight value;
A weight value judging means for judging whether or not the weight value of the object to be weighed by the weighing means is a value within the proper range;
An informing means for informing a determination result by the weight value determining means;
A weighing device comprising display means for displaying the target weight value derived by the computing means. As the metric setting information, by the input means, the minimum target candidate value that is the first term and tolerance of the plurality of target candidate values forming an arithmetic progression, and an allowable value indicating the size of the appropriate amount range or the allowable value Only the appropriate amount range demarcating information consisting of values necessary for calculating
The computing means is
The target weight based on a predetermined arithmetic expression derived from the plurality of target candidate values forming the arithmetic sequence, the minimum target candidate value, and the weight value of the object to be weighed by the weighing means. A value is calculated, the target weight value is determined as the lower limit value of the appropriate amount range, and the value obtained by adding the allowable value to the lower limit value is determined as the upper limit value of the appropriate amount range to derive the appropriate amount range. ,
The weighing device according to claim 1. As the metric setting information, the input means calculates tolerances of the plurality of target candidate values forming an equidistant sequence, the minimum target candidate values, and an allowable value or an allowable value indicating the size of the appropriate amount range. Only the appropriate amount range demarcating information consisting of the values necessary for
The computing means is
A predetermined arithmetic expression derived from the plurality of target candidate values forming the arithmetic progression, a tolerance of the plurality of target candidate values, the minimum target candidate value, and a target to be measured that is measured by the measuring unit. The target weight value is calculated based on the weight value of the object, the target weight value is determined as the lower limit value of the appropriate amount range, and the value obtained by adding the allowable value to the lower limit value is determined as the upper limit value of the appropriate amount range. Configured to derive the dosage range;
The weighing device according to claim 1. The computing means is
The appropriate amount range is derived with respect to the derived target weight value, and an overdose range that is a range that exceeds the upper limit value of the appropriate amount range and a lightweight range that is a range that is less than the lower limit value of the appropriate amount range are derived. In this case, when the plurality of target candidate values are arranged in ascending order, the overload range when the nth (n is a positive integer) target candidate value becomes the target weight value, and the (n + 1) th target candidate value is the target. It is configured to derive the overweight range and the lightweight range with respect to the derived target weight value so that the lightweight range in the case of the weight value is continuous without overlapping,
The weight value determining means includes
The weight value of the object to be weighed by the weighing unit is configured to determine whether the weight value derived by the calculation unit is a value within the appropriate range, the overdose range, or the lightweight range.
The weighing device according to claim 1. The computing means is
When the weight value of the object to be weighed is acquired from the weighing means at predetermined time intervals, and the weight value acquired this time is larger than the weight value acquired last time, the nth target candidate value becomes the target weight value. A first boundary value that is a boundary value between the overdose range and the light weight range when the n + 1th target candidate value is the target weight value,
When the weight value acquired this time is smaller than the weight value acquired this time, the overdose range when the nth target candidate value becomes the target weight value, and the n + 1th target candidate value becomes the target weight value. Configured to be larger than the second boundary value, which is the boundary value with the lightweight range of the case,
The weighing device according to claim 4. A target weight value switching range that is a predetermined value is set in advance,
The computing means is
The first boundary value is a value obtained by adding the target weight value switching width to one half of the sum of the nth target candidate value and the n + 1th target candidate value,
The previous second boundary value is configured to be a value obtained by subtracting the target weight value switching width to one half of the sum of the nth target candidate value and the n + 1th target candidate value.
The weighing device according to claim 5. The computing means is
When the weighing setting information is input by the input means, target candidate values other than the minimum target candidate value are calculated in advance based on the weighing setting information, and all the target candidate values are stored in advance.
When the weighing object is weighed by the weighing means, a target candidate value closest to the weight value of the object to be weighed is selected from the stored target candidate values, and this is selected as the target weight. Configured to determine the value,
The weighing device according to claim 1. Further comprising operating means for fixing the target weight value and releasing the fixing,
When the operation for fixing the target weight value is performed on the operation means, the target weight derived based on the weight value of the object to be weighed and the measurement setting information by the calculation means at the time of the operation The value and the appropriate amount range are fixed, and the calculation means is configured not to newly derive the target weight value and the appropriate amount range until an operation for releasing the fixation is performed.
The weighing device according to any one of claims 1 to 7.

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