JP6234290B2 - Meter - Google Patents

Description

  The present invention relates to a measuring instrument used for an operator to perform a work of filling a certain amount of an object to be measured in a bag or a container.

  Conventionally, in order to perform a work of packing a certain amount of objects to be weighed into a bag or a container in a production factory or a supermarket that produces foods (hereinafter, this work is referred to as “fixed work”), (For example, refer to Patent Documents 1 and 2).

  The measuring instrument used for the regular operation is configured to notify that the weight is appropriate when the weight value of the object to be weighed is within a preset appropriate weight range. Then, the operator places the object to be weighed on the measuring instrument, takes out the object to be weighed informed of the proper amount from the measuring instrument, and packs it in a bag or a container. By repeatedly performing this operation, the production of products packed with an appropriate amount of objects to be weighed is continuously advanced.

JP 2007-71597 A JP 2013-36845 A

  Since the above-described fixed work is a repetition of monotonous work, it is not easy for an operator to maintain high motivation.

  In addition, for example, when performing quantitative packing (packing) of objects to be weighed having variations in individual weights such as potatoes, the working speed varies depending on the skill level of the operator. Therefore, the production quantity varies greatly depending on the skill level of the worker even within the same work time. Also, when producing the same quantity of goods, the working time varies greatly depending on the skill level of the worker. Thus, if the working time and the production quantity are not stable by the worker, it becomes difficult for the manager to make a production plan.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a measuring instrument capable of improving the motivation of a worker who performs a constant work. Another object of the present invention is to provide a measuring instrument that can alleviate the difference in work speed depending on the skill level of an operator and stabilize the work time and the production quantity.

  In order to achieve the above-mentioned object, a measuring instrument according to an aspect of the present invention is used in a fixed operation for producing a product made of an object to be weighed whose weight is a value within an appropriate weight range. Weigh the object to be weighed placed on the part, determine whether this weight is within the proper weight range, and notify that it is the proper amount when it is within the proper weight range. A measuring device for counting the number of products produced, and for each time a predetermined number of products are produced, the number of products produced per unit time is calculated and the number of products produced per unit time is calculated. And a work level deriving means for deriving which of the plurality of predetermined work levels the work level of the worker is based on.

  According to this configuration, every time a predetermined number of products are produced, the worker's work level can be derived based on the production number per unit time, in other words, the work speed. Then, by notifying the worker of this work level, the worker can grasp his / her skill level, so that he / she can aim for a higher level than the present time and improve the worker's motivation.

  The work level deriving means is configured to derive a future work level based on the number of products produced per unit time and the current work level every time the predetermined number of products are produced. When the derived future work level is higher than the current work level, the appropriate weight range is changed so that the range is narrowed. When the future work level is lower than the current work level, Further, an appropriate weight range changing means for changing the appropriate weight range so as to widen the range may be further provided.

  According to this configuration, as the work level is higher, the weight range is changed so that the appropriate weight range is narrowed. Therefore, the difference in work speed due to the skill level of the worker can be alleviated, and the work time and the production quantity can be stabilized. it can. Therefore, it becomes easy for an administrator or the like to make a work plan.

  The work level deriving means compares the production number per unit time with the target production number per unit time each time the predetermined number of products are produced, and the production number per unit time is the target per unit time. When a comparison result that is greater than the production quantity is obtained once or continuously for a predetermined number of times, the future work level is changed to a work level that is one higher than the current work level, and the production quantity per unit time is the unit. When a comparison result that is smaller than the target production quantity per time is obtained once or continuously for the predetermined number of times, the future work level is changed to a work level one lower than the current work level, and the appropriate amount is set. When the future work level is changed from the current work level, the weight range changing means is adapted to a predetermined range for each work level. Based on the weight range, it is configured to change to an appropriate weight range according to the future work level, and the appropriate weight range determined in advance for each work level is smaller as the work level is higher. It may be determined to be.

  According to this configuration, as the work level is higher, the upper limit value of the appropriate weight range is reduced and the range is reduced so that the difference in work speed due to the skill level of the worker is alleviated. The production volume can be stabilized. Therefore, it becomes easy for an administrator or the like to make a work plan.

  The work level deriving means calculates the production number per unit time each time the predetermined number of products are produced, calculates the average weight value of the predetermined number of products, and calculates the production number per unit time. Compared with the target production quantity per hour, when a comparison result is obtained that the production quantity per unit time is equal to or greater than the target production quantity per unit time, based on the average weight value of the product, The work level is determined to be one of the same work level as the current work level and the work level close to the current work level, and the number of production per unit time is the target per unit time. When a comparison result that is smaller than the production number is obtained, it is configured to change the future work level to a work level one lower than the current work level, When the future work level is changed from the current work level, the appropriate amount weight range changing means is based on an appropriate weight range determined in advance for each work level, and an appropriate amount according to the future work level. An appropriate weight range that is configured to be changed to a weight range and is predetermined for each work level may be set such that the upper limit value becomes smaller as the work level is higher.

  According to this configuration, as the work level is higher, the upper limit value of the appropriate weight range is reduced and the range is reduced so that the difference in work speed due to the skill level of the worker is alleviated. The production volume can be stabilized. Therefore, it becomes easy for an administrator or the like to make a work plan.

  The work level deriving means collates the production quantity per unit time with the target production quantity per unit time predetermined for each work level each time the predetermined number of products are produced. The current work level may be derived based on the result.

  According to this configuration, every time a predetermined number of products are produced, the current work level can be derived based on the production quantity per unit time, in other words, the work speed.

  The work level deriving means calculates the production number per unit time each time the predetermined number of products are produced, calculates the average weight value of the predetermined number of products, and sets the production number per unit time. A target production number per unit time that is predetermined with respect to the work level of the product, and an average weight value of the product is compared with a range of the average weight value that is predetermined with respect to each work level, The current work level may be derived based on these matching results.

  According to this configuration, every time a predetermined number of products are produced, the current work level can be derived based on the number of products produced per unit time and the average weight value of the products, in other words, based on work speed and yield.

  You may further provide the alerting | reporting means which alert | reports the work level derived | led-out by the said work level deriving means.

  According to this configuration, since the worker can know his / her skill level by notifying the work level, he / she can aim for a higher level than the present time and improve the worker's motivation.

  Every time the predetermined number of products are produced, the work level when the predetermined number of products are produced, the production number per unit time, the average weight value of the predetermined number of products, and the predetermined number of products You may further provide the memory | storage means which memorize | stores the production work information containing the standard deviation of a weight as a log | history, and the output means which outputs the said production work information memorize | stored as a log | history in the said memory | storage means.

  According to this configuration, by storing and outputting the history of production work information in this way, it is possible to know the transition of the work level and the like, and it is easy for the manager and the like to grasp the process of improving the ability of the worker. become.

  You may further provide the login means which performs a login process and recognizes that it is a predetermined operator by this login process.

  The storage unit may be configured to store worker information, which is information for specifying the worker recognized by the login unit, in the production work information.

  According to this configuration, since the worker information is included in the production work information and stored, by outputting the production work information history, it is possible to know the transition of the work level and the like for each worker. It will be easier to understand the process of capacity improvement.

  The present invention has the above-described configuration, and has an effect that it is possible to provide a measuring instrument that can improve the motivation of an operator who performs a constant work. In addition, there is an effect that it is possible to provide a measuring instrument that can alleviate the difference in work speed depending on the skill level of the worker and can stabilize the work time and the production quantity.

FIG. 1A is an external view showing an example of a measuring instrument according to an embodiment of the present invention, and FIG. 1B is a block diagram showing a configuration of the measuring instrument of FIG. FIG. 2 is a flowchart showing an example of the operation in the first measurement mode of the measuring instrument of the present embodiment. FIG. 3 is a flowchart showing an example of details of the steps of the weighing process in FIG. FIG. 4 is a flowchart showing an example of details of steps of the work level derivation process in FIG. FIG. 5 is a diagram showing an example of display by the measuring instrument of the present embodiment. FIGS. 6A and 6B are diagrams showing examples of the relationship between each work level, the target production quantity per unit time, and the appropriate weight range (lower limit value and upper limit value). FIG. 7 is a diagram illustrating an example of a level change range and a level invariable range at each work level in the operation example in the second measurement mode. FIG. 8 is a flowchart showing an example of the operation in the third measurement mode of the measuring instrument of the present embodiment. FIG. 9 is a diagram illustrating an example of a correspondence relationship between the production level per unit time, the average weight value per produced product, and the work level in the operation example in the fourth weighing mode of the weighing instrument of the present embodiment. It is. FIG. 10A is an external view showing another example of the measuring instrument according to the embodiment of the present invention, and FIG. 10B is a block diagram showing the configuration of the measuring instrument of FIG.

  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 showing an example of a measuring instrument according to an embodiment of the present invention, and FIG. 1B is a block diagram showing a configuration of the measuring instrument of FIG.

  This weighing machine is a digital automatic pan automatic scale, and is used, for example, to produce a product for quantitatively filling an object to be weighed (for example, packing potatoes or the like). This measuring instrument includes a measuring unit 11, a main body 15, and a controller 20.

  The weighing unit 11 includes 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 can weigh the object to be weighed on the weighing pan 12. Become. 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 sequentially weighed by the weight sensor 13 and input to the controller 20. 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 17, and a determination lamp 18 on the front surface thereof. The operation unit 16 functions as means for inputting operations such as operation start and operation stop of the measuring instrument, operation condition (parameter) values and the like of the measuring instrument to the controller 20. 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. The display unit 17 is configured 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. Further, the controller 20 functions as a counting means for counting the number of products produced, a work level deriving means, an appropriate weight range changing means, and the like. 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 measuring instrument configured as described above will be described. The operation of the measuring instrument is controlled by the controller 20, and all information necessary for operating the measuring instrument 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 instrument, for example, the weighing capacity is 3000 g, the scale weight is 1 g, and the minimum measured quantity is 20 g.

  This measuring instrument has a plurality of measuring modes (operation modes), here, four measuring modes of first to fourth measuring modes, and is configured to operate in accordance with a set measuring mode. For example, the administrator can operate the operation unit 16 to switch the measuring instrument between the setting mode and the first to fourth measuring modes. First, for example, before starting the work, the administrator operates the operation unit 16 to select a setting mode, and in the setting mode, selects a measurement mode for setting parameters from the first to fourth measurement modes. In addition, the value of each parameter necessary for the selected weighing mode is set. These settings are configured such that information necessary for setting is displayed on the display unit 17 and can be set by operating the operation unit 16 while viewing the information. Further, when an operator or the like switches to a desired weighing mode in which parameters are set, the weighing instrument operates based on the desired weighing mode and the value of each parameter.

[Example of operation in the first weighing mode]
FIG. 2 is a flowchart showing an example of the operation in the first measurement mode of the measuring instrument of the present embodiment. FIG. 3 is a flowchart showing an example of details of step S4 of the weighing process in FIG. FIG. 4 is a flowchart showing an example of details of step S9 of the work level derivation process in FIG. Moreover, FIG. 5 is a figure which shows an example of the display by the measuring device of this embodiment.

  As described above, the manager operates the operation unit 16 and selects the first measurement mode as the measurement mode for setting parameters in the setting mode before the worker starts work. To determine the target weight per product to be produced, the maximum allowable width, the minimum allowable width, the number of work levels (M), and the timing for deriving the work levels, which are parameters in the first weighing mode The level is changed to a predetermined number of times (k), a target production quantity (Q) per unit time for each work level, and a threshold value (Wt) for determining the presence or absence of an object to be weighed on the weighing pan 12. Each value is set with a threshold value (T). These set values are input from the operation unit 16 and stored (set) in the storage unit of the controller 20. Note that a minimum measurement amount (for example, 20 g) may be automatically set as the threshold value Wt. Further, once the parameter values are set, they are retained (stored) even when the power is turned off, and resetting is unnecessary unless changed. In the setting mode, the operator can input the work level by operating the operation unit 16 and store (set) it in the storage unit of the controller 20.

  The work level is an index indicating the work ability of the worker, and is divided into a plurality of (M) levels. Here, it is divided into five levels from level 1 to level 5 (M = 5), and the larger the value, the better the work ability. As an example, a target weight (400 g), a maximum allowable width (40 g), a minimum allowable width (20 g), and a predetermined number of times k (k = 20) are set. It is assumed that the target production quantity per unit time is set to 2 pieces / minute (see FIG. 6A).

  When performing a weighing operation (product production operation), the operator operates the operation unit 16 to set the measuring instrument to a desired measurement mode (here, the first measurement mode). Then, the operator places an object to be weighed on the weighing pan 12, and when the determination lamp 18 lights in blue as will be described later, packs the object to be weighed on the weighing pan 12 into a pack and puts one product. Produce. In this way, products are produced sequentially.

  In the first measurement mode, the controller 20 determines whether or not the work level is set as shown in FIG. 2 (step S1), and if not, sets the work level to level 1. (Step S2).

  Next, in accordance with the set work level, the controller 20 determines an appropriate amount weight range of a product to be produced (packed objects to be packed) and a target production number (Q) per unit time. Calculate and set (step S3).

  The appropriate weight range is calculated by setting the lower limit value as the target weight and the upper limit value as (target weight + application allowable width). Here, the allowable application width is calculated by the following equation. The work level value (work level setting value) is V.

Applicable permissible width = (maximum permissible width−minimum permissible width) ÷ (M−1) × (MV) + minimum permissible width For example, the number M of work levels is 5, the work level set value V is 3, and the target When the weight is 400 g, the maximum allowable width is 40 g, and the minimum allowable width is 20 g, the applicable allowable width is 30 g according to the following equation.

Applicable tolerance = (40−20) ÷ (5-1) × (5−3) + 20 = 30
Therefore, the upper limit value of the appropriate weight range for work level 3 is 400 g + 30 g = 430 g, and the appropriate weight range is 400 g or more and 430 g or less. In addition, when the number M of work levels, the target weight, the maximum allowable width, and the minimum allowable width are set, an appropriate amount weight range corresponding to each work level (V = 1 to M) may be calculated in advance. . In the case of this example, the application allowable widths of the work levels (V) 1, 2, 3, 4, and 5 can be calculated as 40 g, 35 g, 30 g, 25 g, and 20 g. A value obtained by adding the target weight (400 g), which is the lower limit value, to the upper limit value of the appropriate weight range (see FIG. 6A).

  From the time when the work level is set, the controller 20 displays the set work level (for example, “work level 3”) on the screen of the display unit 17 as shown by the reference numeral 100 in FIG. Let

  Next, the weighing process (step S4) is performed based on the flow of FIG.

  The controller 20 calculates the weight (W) of the object to be weighed on the weighing pan 12 based on the weight signal of the weight sensor 13 acquired sequentially (step S21).

  And it is determined whether the weight (W) of a to-be-measured object is larger than the preset threshold value (Wt, for example, 20g) (step S22).

  Here, when the weight (W) of the object to be weighed is equal to or smaller than the threshold value (Wt), the determination lamp 18 is turned off as in the state indicated by reference numeral 100 in FIG. 5 (step S28).

  On the other hand, if the weight (W) of the object to be weighed is larger than the threshold value (Wt), the process proceeds to the next determination step S23, where the weight (W) of the object to be weighed is the lower limit value (WD, For example, it is determined whether it is 400 g) or more.

  Here, when the weight (W) of the object to be weighed is less than the lower limit value (WD), it is determined that the object to be weighed is light, and the determination lamp 18 is turned red as shown by reference numeral 101 in FIG. Is lit (step S27). As a result, the operator replaces or adds the object to be weighed.

  On the other hand, if the weight (W) of the object to be weighed is not less than the lower limit value (WD), the process proceeds to the next determination step S24, and the weight (W) of the object to be weighed is the upper limit value (WU, for example, 430 g) ) Is determined (step S24).

  Here, when the weight (W) of the object to be weighed is larger than the upper limit value (WU), it is determined that the object to be weighed is excessive, and the determination lamp 18 is turned on as shown by reference numeral 103 in FIG. Lights up yellow (step S26). As a result, the operator replaces and takes out the object to be weighed.

  On the other hand, when the weight (W) of the object to be weighed is equal to or less than the upper limit (WU), it is determined that the object to be weighed is an appropriate amount, and the determination lamp 18 is turned blue as shown by reference numeral 102 in FIG. Turn on (step S25). The operator packs the objects to be weighed on the weighing pan 12 at this time as a product in a pack. Thereby, one product is produced.

  After determining that the object to be weighed is an appropriate amount as described above, the controller 20 increases the value of the measurement number n by 1 (step S5), and whether the measurement number n has reached the predetermined number k (k = 20). It is determined whether or not (step S6). The initial value of the number of times n is set to 0. In addition, calculating (updating) the number of times n is measured (updated) in step S5 corresponds to counting the number of products that are made of the objects to be weighed that have been determined to have an appropriate weight.

  The weighing process in step S4 is repeated until the number of times n is equal to the predetermined number k. When the weighing number n reaches the predetermined number k, the weighing number n is set to 0 (step S7), production work information is stored (step S8), and work level derivation processing is performed (step S9). That is, every time k products are produced, production work information is stored and work level derivation processing is performed.

  The production work information stored in step S8 includes, for example, the current work level, the number of products produced per unit time (P) of k produced products, and the average weight value (Ave) per piece of k produced products. ) And the standard deviation of the weight of the k manufactured products. That is, in step S8, for example, the number of products produced per unit time (P), the average weight value (Ave) per k products produced, and the standard deviation of the weight of the k products produced are calculated. , Store them in association with the current work level. This production work information is stored as a history every time step S8 is performed.

  Here, when calculating the production number (P) per unit time, the controller 20 controls the production time t required to produce the most recently produced k (predetermined number) products. The time is measured by the device 20 and is calculated as P = k ÷ t. Here, P is calculated as an integer value by rounding (for example, rounding off after the decimal point). Note that the production time t is calculated as, for example, the time from the start of the weighing mode until the first step S7 is performed in the case of immediately after the start of the measurement, and then the next time after the step S7 is performed. It can be calculated as the time until step S7 is performed.

  The work level derivation process in step S9 is performed based on the flow in FIG.

  The controller 20 calculates the production number (P) per unit time for the k products (predetermined number) produced most recently (step S30). In addition, when the production quantity (P) per unit time is included in the production work information in step S8 described above, the value calculated in step S8 may be used, and step S30 can be omitted.

  Next, the controller 20 determines whether or not the production quantity (P) per unit time is larger than the target production quantity (Q) per unit time (step S31).

  If P> Q, the level down counter value is set to 0 (step S32), and it is determined whether the current work level is not the highest level (level 5) (step S33).

  If the current work level is the highest level, the current work level derivation process is terminated, and if it is not the highest level, the level up counter value is incremented by 1 (step S34).

  Next, it is determined whether or not the level up counter value is a level change threshold value (T) (step S35). If the level up counter value is not the level change threshold value (T), the current work level derivation process is terminated. If the level up counter value is the level change threshold value (T), the level up counter value is set to 0. In step S36, the work level is changed to a level one higher than the current level (step S37). At this time, the work level displayed on the display unit 17 is also changed to the changed level. The level change threshold (T) is set to T = 3, for example.

  On the other hand, if P> Q is not satisfied in step S31, the level-up counter value is set to 0 (step S38), and the production quantity (P) per unit time is smaller than the target production quantity (Q) per unit time. It is determined whether or not (step S39).

  If P <Q is not satisfied, the level down counter value is set to 0 (step S40), and the current work level derivation process is terminated.

  On the other hand, if P <Q, it is determined whether the current work level is not the lowest level (level 1) (step S41).

  If the current work level is the lowest level, the current work level derivation process is terminated, and if it is not the lowest level, the level down counter value is incremented by 1 (step S42).

  Next, it is determined whether or not the level down counter value is a level change threshold value (T) (step S43). If the level down counter value is not the level change threshold value (T), the current work level deriving process is terminated, and if it is the level change threshold value (T), the level down counter value is set to 0. In step S44, the work level is changed to one level lower than the current level (step S45). At this time, the work level displayed on the display unit 17 is also changed to the changed level.

  In other words, this work level derivation process is performed every time k products are produced, and the number of products (P) per unit time (for example, 1 minute) and unit time for the most recently produced k products. Compare the target production quantity (Q) per one minute (for example, 1 minute), and if P> Q continues for T times (T is a level change threshold), the work level is set higher than the current level. Change to one higher level (the upper limit is level 5), and if P <Q continues T times, change the work level to a level one lower than the current level (however, the lower limit is level 1) I am doing so. The level change threshold value (T) may be set to T = 1.

  Next, the controller 20 determines whether or not the work level has been changed in the work level derivation process of step S9 in step S10 of FIG.

  If there is no change in the work level, the processing from step S4 is repeated. If the work level has been changed, the process proceeds to step S11, and in the same manner as in step S3 described above, an appropriate weight range and a target production per unit time according to the changed work level. The number (Q) is set (updated), and the processing from step S4 is repeated.

  FIGS. 6A and 6B are diagrams showing examples of the relationship between each work level, the target production quantity per unit time, and the appropriate weight range (lower limit value and upper limit value).

  In the case of FIG. 6A, as described in the above operation example, the target production quantity (Q) per unit time is set to be the same in all work levels 1 to 5, and each work level 1 to 5 is set. The appropriate weight range is set according to 5. In this case, the upper limit value of the appropriate weight range is changed according to the work level so that the higher the work level, the smaller the upper limit value of the appropriate weight range.

  In the case of FIG. 6A, for example, when the current work level is 3, the upper limit value of the appropriate weight range is 430 g. At this time, if P> 2 (= Q) continues for T times, the work level becomes 4 and the upper limit value is changed to 425 g. Further, if P> 2 continues for T times, the work level becomes 5 Thus, the upper limit value is changed to 420 g. On the other hand, when the work level is 3, if P <2 continues for T times, the work level becomes 2 and the upper limit is changed to 435 g. Further, if P <2 continues for T times, the work level 1 and the upper limit is changed to 440 g.

  On the other hand, in the case of FIG. 6B, the target production quantity per unit time and the appropriate weight range are set to be different according to each work level 1-5. In this case, the higher the work level is, the larger the target production number per unit time is, and the both are changed according to the work level so that the upper limit value of the appropriate weight range is reduced.

  In the case of FIG. 6B, for example, when the current work level is 3, the target production number Q = 3 and the upper limit value of the appropriate weight range is 430 g. At this time, if P> 3 (= Q) continues T times, the work level is 4, the target production number Q = 4, and the upper limit value is changed to 425 g. When P> 4 (= Q) at work level 4, if T times continues, the work level becomes 5, the target production number Q = 5, and the upper limit value is changed to 420 g. When the work level is 3 and P <3 continues T times, the work level becomes 2, the target production number Q = 2, and the upper limit value is changed to 435 g. When P> 2 (= Q) at work level 2, if the work continues for T times, the work level becomes 3, the target production number Q = 3, and the upper limit returns to 430 g. On the other hand, if the case of work level 2 and P <2 (= Q) continues T times, the work level becomes 1, the target production quantity Q = 1, and the upper limit is changed to 440 g.

  6A and 6B, the higher the work level, the smaller the upper limit value of the appropriate weight range, so the higher the work level, the better the yield. Therefore, it is preferable to change the upper limit value of the appropriate weight range as the work level increases.

  In the case of FIG. 6 (B), when the work level is increased by one, the target production quantity per unit time is increased and the upper limit value of the appropriate weight range is reduced, so that the capability between adjacent work levels is increased. The difference is set to be large, and it can be considered that the work level is frequently changed as the work level becomes higher or lower. In such a case, it is preferable to set the same target production quantity per unit time in all work levels 1 to 5 as in the above-described operation example. Alternatively, the target production quantity per unit time of several adjacent work levels may be set to be the same. For example, for the work levels 1 to 3, the target production quantity per unit time may be two, and for the work levels 4 and 5, the target production quantity per unit time may be three.

  Further, as in the above-described operation example (for example, in the case of FIG. 6A), the target production quantity per unit time is set to be the same for all work levels 1 to 5, and the higher the work level, the more appropriate the weight. By changing the upper limit value of the range to be small, the difference in work speed depending on the skill level of the worker can be reduced, and the work time and the production quantity can be stabilized. Therefore, it becomes easy for an administrator or the like to make a work plan.

  Also, since the work level is displayed on the display unit 17, the worker's own skill level is digitized and displayed, so that the worker's motivation is improved by thinking of aiming for a higher level than the current level. Can do.

[Example of operation in the second weighing mode]
In the first weighing mode described above, a future work level is derived (work level change and non-change) based on the current work level and the number of production (P) per unit time when k pieces are produced. However, in this second weighing mode, based on the current work level, the production number per unit time (P) when k pieces are produced, and the average weight value (Ave) per product, Deriving future work levels (changing or not changing work levels).

  That is, the second measurement mode is different from the first measurement mode in the work level derivation process (step S9) in FIG. In the second measurement mode, the target production quantity (Q) per unit time is set to be the same for all work levels. Therefore, in step S3 and step S11 of FIG. 2, in the case of the second weighing mode, processing for setting or updating an appropriate weight range according to the work level is performed, but the target production quantity (Q ) Is not set or updated. The target production quantity (Q) per unit time is not changed and remains a preset value (for example, 2 pieces / minute) common to all work levels in the setting mode. Except for these, it is the same as in the case of the first weighing mode (FIG. 2).

  The work level derivation process (step S9) in the second measurement mode will be described. In the second weighing mode, for each work level, a level change range and a level invariable range are set in advance in the weight range corresponding to an appropriate weight range in the setting mode.

  FIG. 7 is a diagram illustrating an example of a level change range and a level invariable range at each work level in the operation example in the second measurement mode. In FIG. 7, it is assumed that the lower limit value and the upper limit value of the appropriate weight range at each work level are set to be the same as those in FIG.

  The level change range includes a high level change range and a low level change range. In FIG. 7, for the work level m (m = 1 to 5), the high level change range is RHm, and the low level change range is RLm. The level invariant range is indicated by RCm (however, RH5 and RL1 do not exist).

  For each of work levels 2 to 4 excluding the highest level and the lowest level, each appropriate weight range is divided into three ranges, and the range including the lower limit value of the appropriate weight range is the high level change range RHm. The range including the upper limit value of the weight range is the low level change range RLm, and the range between these ranges RHm and RLm is the level invariable range RCm.

  On the other hand, for the lowest level of work level 1, the appropriate weight range is divided into two ranges, the range including the lower limit value of the appropriate weight range becomes the high level change range RH1, and the range including the upper limit value of the appropriate weight range. Becomes the level invariable range RC1.

  In addition, for the highest level of work level 5, the appropriate amount weight range is divided into two ranges, the range including the lower limit value of the appropriate amount weight range becomes the level invariable range RC5, and the range including the upper limit value of the appropriate amount weight range. The low level change range RL5.

  In FIG. 7, for example, in the case of work level 3, within the appropriate amount weight range (400 to 430 g), the high level change range RH3 is set to 400 g ≦ RH3 ≦ 415 g, and the level invariable range RC3 is set to 415 g <RC3 <. 420g is set, and the low level change range RL3 is set to 420g ≦ RL3 ≦ 430g. Similarly, in the case of work levels 2 and 4, a high level change range (RH2, RH4), a level invariable range (RC2, RC4), and a low level change range (RL2, RL4) are set in each appropriate weight range. ing.

  On the other hand, in the case of work level 1, within the appropriate amount weight range (400 to 440 g), the high level change range RH1 is set to 400 g ≦ RH1 ≦ 425 g, and the level invariable range RC1 is set to 425 g <RC1 ≦ 440 g. There is no low level change range.

  In the case of work level 5, within the appropriate weight range (400 to 420 g), there is no high level change range, the level invariant range RC5 is set to 400 g ≦ RC5 <410 g, and the low level change range RL5 is 410g ≦ RL5 ≦ 420g is set.

  Such a high level change range, a low level change range, and a level invariable range include, for example, a target weight (400 g) that is a lower limit value of an appropriate weight range and an upper limit value of an appropriate weight range for each work level in the setting mode. And set a high level change upper limit (weight value indicated by a triangle in work levels 1 to 4 in FIG. 7) for work levels other than the highest level, and work other than the lowest level. It is set by setting a low level change lower limit value (weight value indicated by a white circle in work levels 2 to 5 in FIG. 7) for the level.

  In this work level derivation process, first, the production quantity per unit time (P) for the k products produced most recently is compared with the target production quantity (Q) per unit time, and P < If it is Q, the future work level is changed to a level one lower than the current work level. However, when the current work level is the lowest level (work level 1), the level is not changed.

  On the other hand, when P ≧ Q, for example, based on the average weight value (Ave) per product calculated in step S8, the future work level is set to the same work level as the current work level and the current work level. It is determined which of the adjacent work levels (that is, the work level one lower than the current work level and / or the work level one higher than the current work level). Specifically, whether the average weight value (Ave) belongs to the high level change range (RHm), the low level change range (RLm), or the level invariable range (RCm) at the current work level (m). Determine the future work level.

  That is, when the average weight value (Ave) belongs to the high level change range (RHm) at the current work level (m), the future work level is changed to a level one higher than the current work level (FIG. 7). Middle right arrow and "+1"). When the average weight value (Ave) belongs to the low level change range (RLm), the future work level is changed to a level one lower than the current work level (the left arrow in FIG. "). When the average weight value Ave belongs to the level invariable range (RCm), the work level is not changed.

  For example, in FIG. 7, when the current work level is 3, if the average weight value Ave is 413 g, it belongs to the high level change range RH3, so the future work level is changed to 4. If the average weight value Ave is 425 g, it belongs to the low level change range RL3, so the future work level is changed to 2. If the average weight value Ave is 418 g, it belongs to the level invariable range RC3, so that the future work level remains the current work level 3 and the level is not changed.

  Also in the operation example of the second measurement mode, as in the operation example of the first measurement mode (for example, in the case of FIG. 6A), the target production number per unit time is the same in all the work levels 1 to 5. The higher the work level, the smaller the upper limit of the appropriate weight range will be, so that the difference in work speed due to the skill level of the worker will be alleviated and the work time and production quantity will be stabilized. be able to. Therefore, it becomes easy for an administrator or the like to make a work plan.

  In addition, since the work level is displayed on the display unit 17, the motivation of the worker can be improved.

[Operation example in 3rd measurement mode]
FIG. 8 is a flowchart showing an example of the operation in the third measurement mode of the measuring instrument of the present embodiment.

  In this case, for example, the administrator operates the operation unit 16 and selects the third measurement mode as the measurement mode for setting parameters in the setting mode before the worker starts work. Then, a predetermined number of times (k) for determining the target weight per product to be produced, the allowable width, the number of work levels (M), and the timing for deriving the work levels, which are parameters in the third weighing mode. And a target production quantity (Q) per unit time for each work level and a threshold value (Wt) for determining the presence or absence of an object to be weighed on the weighing pan 12 are set. These set values are input from the operation unit 16 and stored (set) in the storage unit of the controller 20. Here, the minimum measured amount (20 g) may be automatically set as the threshold value Wt. Further, once the parameter values are set, they are retained (stored) even when the power is turned off, and resetting is unnecessary unless changed.

  In this example, the work level is divided into, for example, five levels from level 1 to level 5 (M = 5), as in the first weighing mode, and the larger the value, the better the work ability. To do. Further, as an example, a target weight (400 g), an allowable width (40 g), and a predetermined number of times k (k = 20) are set, and the target production number per unit time (Q) is 1 / Minute (Q1), Level 2 is 2 / minute (Q2), Level 3 is 3 / minute (Q3), Level 4 is 4 / minute (Q4), Level 5 is 5 / minute (Q5) It is assumed that In the third weighing mode, the appropriate amount weight range is the same at all work levels, and the lower limit value (WD) is set as the target weight, and the upper limit value (WU) is calculated as (target weight + allowable width).

  When performing a weighing operation (product production operation), the operator operates the operation unit 16 to set the measuring instrument to the third measurement mode. Then, as in the first weighing mode, the operator places an object to be weighed on the weighing pan 12 and packs the object to be weighed on the weighing pan 12 in the pack when the determination lamp 18 lights in blue. One product is produced. In this way, products are produced sequentially.

  If it becomes the 3rd measurement mode, the controller 20 will repeat step S51-S56, as shown in FIG. The weighing process in step S51 is the same as step S4 in FIG. 2 (steps S21 to S28 in FIG. 3). However, as described above, the lower limit value (WD) of the appropriate weight range is set as the target weight, and the upper limit value (WU) is set as (target weight + allowable width). Steps S52, S53, and S54 are the same as steps S5, S6, and S7 in FIG.

  In the work level derivation process in step S55, the controller 20 determines the number of products (P) produced per unit time for k products as in the case of step S8 in FIG. 2 (or step S30 in FIG. 4). calculate. Then, the work level is determined based on the production number per unit time (P) and the target production number per unit time (Q1 to Q5) of each work level 1 to 5. Specifically, the work level corresponding to the same target production quantity (Q1 to Q5) as the production quantity (P) is determined. However, the lowest work level 1 includes not only the case where the production quantity (P) is 1 piece / minute but also the case where the production quantity (P) is 0 piece / minute, and the highest work level 5 includes the production quantity (P). In addition to the case of 5 pieces / minute, the case of 6 pieces / minute or more is also included.

  That is, when the production number per unit time (P) is 1 piece / minute or less, the work level is 1, and when the production number (P) is 2 pieces / minute, the work level is 2. When the number (P) is 3 / min, the work level is 3, and when the production number (P) is 4 / min, the work level is 4 and the production quantity (P) is 5 / min. If it is more than minutes, the work level is set to 5.

  Further, when determining the work level in step S55, the controller 20 immediately displays the work level on the screen of the display unit 17. In this case, the work level is not displayed on the display unit 17 until the first step S55 is performed after the measurement is started.

  In the next step S56, as in the case of step S8 in FIG. 2, the current work level determined in step S55, the number of products produced per unit time (P), and the average per k products produced. The production work information including the weight value (Ave) and the standard deviation of the weight of the k produced products is stored as a history.

[Example of operation in 4th measurement mode]
In the above-described third measurement mode, the work level is determined based on the number of production (P) per unit time. In this fourth measurement mode, the work level is set in the work level derivation process in step S55. It is determined on the basis of the number of products produced per unit time (P) and the average weight value (Ave) per k products produced. Except this, it is the same as in the case of the third weighing mode described above.

  FIG. 9 is a diagram illustrating an example of a correspondence relationship between the production level (P) per unit time and the average weight value (Ave) per produced product and the work level in the operation example in the fourth weighing mode. is there. In this case, it can be considered that each work level m (m = 1 to 5) is further subdivided into a plurality of work levels mA, mB, and mC. For example, the main level m is determined based on the number of products produced per unit time (P), and the work levels mA, mB, mC are determined based on the average weight value (Ave) per product. .

  In this case, the controller 20 stores in advance the target production quantity (Qm) per unit time and the range of the average weight value (Ave) per product for determining each work level mA, mB, mC. doing. That is, the administrator operates the operation unit 16 in advance, and inputs an average weight value (Ave) range corresponding to each work level mA, mB, and mC as a parameter. Other parameters are the same as in the third weighing mode.

  Even in the third and fourth measurement modes, as in the case of the first measurement mode, the work level is displayed on the display unit 17 so that the skill level of the worker is displayed numerically for the operator. It is possible to improve the worker's motivation by thinking of aiming for a higher level than the current level.

  In the fourth weighing mode, the work level obtained by subdividing the work level in the third weighing mode according to the average weight value (Ave) can be derived and displayed.

  In the present embodiment, the controller 20 may be configured to have a login function. In this case, for example, when the power is turned on, first, a general login screen for inputting an operator name (user name) and a password is displayed on the screen of the display unit 17. When the operator name and password are input to the login screen by operating the operation unit 16, the operator name and password stored in advance in the storage unit of the controller 20 are collated, and if they match, various operations of the measuring instrument are performed. Is possible. In this case, when storing the production work information (for example, step S8 in FIG. 2 and step S56 in FIG. 8), the controller 20 stores the production work information including the worker name.

  Further, the operation unit 16 is operated so that the history of production work information stored in step S8 of FIG. 2 or step S56 of FIG. 8 can be displayed on the display unit 17. Further, the measuring instrument may have an internal printer (not shown) controlled by the controller 20, and the operation unit 16 may be operated so that a history of production work information can be printed by the internal printer. . In addition, the weighing instrument has a communication means (not shown) controlled by the controller 20, operates the operation unit 16, and records production work information from the controller 20 to an external printer or the like via the communication means. May be configured so that the history of production work information can be printed by an external printer. As described above, the history of production work information is displayed on the display unit 17 or printed by an internal or external printer, so that the transition of work level and the like can be known, and the manager etc. can grasp the process of improving the ability of the worker. Becomes easier. Further, as described above, when the controller 20 is configured to have a login function and the worker name is included in the production work information, the history of the production work information including the worker name is displayed or displayed. Since it is printed, the transition of the work level and the like is known for each worker, and it becomes easy for the manager and the like to grasp the process of improving the ability.

  FIG. 10A is an external view showing another example of the measuring instrument according to the embodiment of the present invention, and FIG. 10B is a block diagram showing the configuration of the measuring instrument of FIG.

  This measuring instrument is a digital platform scale, and is used, for example, to produce a product for quantitative packing (for example, packing) of an object to be weighed. This measuring instrument includes a measuring unit 31, an operation display unit 35, and a controller 40.

  The weighing unit 31 includes a weighing table (mounting unit) 32 on which an object to be weighed is placed, and a weight sensor 33 such as a load cell that supports the weighing table 32 and can measure the weight of the object to be weighed on the weighing table 32. Become. The weight sensor 33 may be composed of a plurality of (for example, four) load cells and the like, and is connected to the controller 40 via a well-known signal processing circuit (for example, an amplifier or an A / D converter) not shown. It is connected. As a result, the weight of the object to be weighed on the weighing platform 32 is sequentially weighed by the weight sensor 33 and input to the controller 40. The controller 40 is stored in the casing of the operation display unit 35.

  The operation display unit 35 includes an operation unit 36, a display unit 37, and a determination lamp 38 on the front surface. The functions of the operation unit 36, display unit 37, determination lamp 38, and controller 40 are the same as the functions of the operation unit 16, display unit 17, determination lamp 18, and controller 20 shown in FIGS. Therefore, detailed description is omitted.

  In this embodiment, the work level is displayed on the display units 17 and 37, but a display means for displaying the work level may be provided separately. Further, the display (notification) of the work level is not limited to the level value or the like, but may be a bar graph display, lighting of a lamp provided for each level, or the like as long as the work level can be notified to an operator or the like. .

  Moreover, although this embodiment demonstrated as a measuring device which has 1st-4th four measurement modes, operation | movement of any one measurement mode in 1st-4th measurement mode, or any 2 You may comprise as a measuring device which can perform the operation | movement of one measuring mode.

  The present invention is a measuring instrument that can improve the motivation of a worker who performs routine work, and also reduces the difference in work speed depending on the skill level of the worker, thereby stabilizing the work time and the production quantity. It is useful as a measuring instrument that can be used.

DESCRIPTION OF SYMBOLS 11 Weighing part 12 Weighing pan 13 Weight sensor 15 Main body 16 Operation part 17 Display part 18 Judgment lamp 20 Controller

Claims (7)

This is used for fixed operations that produce products consisting of objects to be weighed that have values within the appropriate weight range. The weight of the object to be weighed placed on the mounting part is weighed, and this weight is within the appropriate weight range. A measuring instrument that determines whether or not a value is within the proper weight range and informs that it is a proper amount.
Counting means for counting the number of products produced;
Each time a predetermined number of products are produced, the production number per unit time of the predetermined number of products is calculated, and a plurality of work levels in which the worker's work level is determined in advance based on the production number per unit time Working level deriving means for deriving which level of
The work level deriving means includes:
Each time the predetermined number of products are produced, a future work level is derived based on the production quantity per unit time and the current work level,
When the future work level derived by the work level deriving means is higher than the current work level, the appropriate weight range is changed so that the range is narrowed, and the future work level is higher than the current work level. In the case of a low level, the apparatus further comprises an appropriate weight range changing means for changing the appropriate weight range so that the range is widened .
Weighing device. The work level deriving means includes:
Each time the predetermined number of products are produced, the production quantity per unit time is compared with the target production quantity per unit time, and the comparison result that the production quantity per unit time is larger than the target production quantity per unit time Is obtained once or a predetermined number of times, the future work level is changed to a work level one higher than the current work level, and the production quantity per unit time is greater than the target production quantity per unit time. When the comparison result of small is obtained once or continuously for the predetermined number of times, the future work level is changed to a work level one lower than the current work level,
The appropriate weight range changing means is:
When the future work level is changed from the current work level, it is configured to change to an appropriate weight range corresponding to the future work level, based on an appropriate weight range predetermined for each work level. ,
The appropriate weight range determined in advance for each of the work levels is determined such that the upper limit value becomes smaller as the work level is higher.
The measuring instrument according to claim 1 . The work level deriving means includes:
Every time the predetermined number of products are produced, the production number per unit time is calculated and the average weight value of the predetermined number of products is calculated, and the production number per unit time is set as the target production number per unit time. In comparison, when a comparison result is obtained that the production quantity per unit time is equal to or greater than the target production quantity per unit time, the future work level is set to the same as the current level based on the average weight value of the product. The result of the comparison that the work level is determined from the work level and the work level close to the current work level, and the production quantity per unit time is smaller than the target production quantity per unit time Is configured to change the future work level to a work level one lower than the current work level,
The appropriate weight range changing means is:
When the future work level is changed from the current work level, it is configured to change to an appropriate weight range corresponding to the future work level, based on an appropriate weight range predetermined for each work level. ,
The appropriate weight range determined in advance for each of the work levels is determined such that the upper limit value becomes smaller as the work level is higher.
The measuring instrument according to claim 1 . This is used for fixed operations that produce products consisting of objects to be weighed that have values within the appropriate weight range. The weight of the object to be weighed placed on the mounting part is weighed, and this weight is within the appropriate weight range. A measuring instrument that determines whether or not a value is within the proper weight range and informs that it is a proper amount.
Counting means for counting the number of products produced;
Each time a predetermined number of products are produced, the production number per unit time of the predetermined number of products is calculated, and a plurality of work levels in which the worker's work level is determined in advance based on the production number per unit time Working level deriving means for deriving which level of
The work level deriving means includes:
Each time the predetermined number of products are produced, the production number per unit time is calculated and the average weight value of the predetermined number of products is calculated, and the production number per unit time is determined in advance for each work level. The target production quantity per unit time is collated, the average weight value of the product is collated with a predetermined average weight value range for each work level, and based on these collation results Configured to derive the current work level ,
Weighing device. The measuring instrument according to any one of claims 1 to 4 , further comprising notifying means for notifying the work level derived by the work level deriving means. Every time the predetermined number of products are produced, the work level when the predetermined number of products are produced, the production number per unit time, the average weight value of the predetermined number of products, and the predetermined number of products Storage means for storing production work information including a standard deviation of weight as a history;
6. The measuring instrument according to claim 1 , further comprising output means for outputting the production work information stored as a history in the storage means. A log-in means for performing a log-in process and recognizing that the worker is predetermined by the log-in process;
The measuring device according to claim 6 , wherein the storage unit is configured to store worker information, which is information for identifying the worker recognized by the login unit, in the production work information.