JP6484581B2 - Weight measuring device - Google Patents

Description

  The present invention relates to a weight measuring device for weighing an object to be weighed while being conveyed.

  A weight measuring device is incorporated and used in a production line for foods, etc., and this weight measuring device is used to sequentially carry in the produced articles from the previous stage and to measure the carried articles in the weighing unit while conveying them. It has become.

  In a weight measuring apparatus that performs such dynamic weighing (dynamic weighing), the accuracy of weighing is confirmed using a true value obtained by measuring a stationary sample. When confirming the weighing accuracy, the operator writes down the weight of the sample statically weighed by the stationary balance as a true value, and dynamically weighs the same sample with the weight measuring device. Then, the operator calculates a measurement accuracy such as a repeat accuracy from the measurement value and the true value, and determines whether the measurement accuracy is within a predetermined reference range. Therefore, there is a problem that the operator's work process for checking accuracy increases.

  On the other hand, the technique described in Patent Document 1 is known as a technique for causing the apparatus to calculate the measurement accuracy. In the device described in Patent Document 1, the true value of the sample is input to the weight measuring device, the weight measuring device calculates the weighing accuracy using the true value, and the calculated weighing accuracy is displayed in an allowable value. It is like that.

JP 2006-322751 A

  However, the thing of patent document 1 does not consider calculating measurement accuracy using a plurality of samples. For this reason, since the thing of patent document 1 needs to carry and measure one sample for the number of times required for calculation of measurement accuracy, the work process of accuracy check cannot be reduced, and accuracy check is great. It took a long time.

  Therefore, the present invention has been made to solve the above-described conventional problems, and a weight measuring apparatus capable of performing accuracy confirmation using a plurality of samples while reducing the accuracy confirmation work process. The purpose is to provide.

  A weight measuring apparatus according to the present invention includes a transport unit (10) for transporting an object to be weighed, and a weighing unit (20) for measuring an object being transported by the transport unit and outputting a measured value. A mode switching control unit (42) for switching the operation mode to a normal operation mode or an accuracy confirmation mode for confirming the weighing accuracy of the weighing unit, and a setting unit for inputting a standard value of the weighing accuracy (50), a true value acquisition unit (50, 45) for acquiring the true value of the weight of a plurality of samples, and a control unit (41) for controlling the operation in the accuracy check mode, the control unit Includes a weighing control unit (41A) for transporting the plurality of samples by the transport unit and weighing the samples by the weighing unit, and a data management unit (41B) for associating the plurality of true values with the measurement values of the plurality of samples. And correspondence in the data management unit A statistic calculation unit (41C) that calculates a statistic based on the difference between the measured value and the true value of each sample, and the measurement accuracy of the measurement unit is based on the statistic of the statistic calculation unit. A conformity result output unit (41D) that determines whether or not it conforms to a standard value and outputs a determination result;

  With this configuration, for example, the difference between the measured value and the true value can be obtained between the same samples by transporting a plurality of samples by the transport unit in the same order as the acquisition order of the true value. A statistic based on the difference can be calculated. For this reason, accuracy confirmation can be performed using a plurality of samples. In addition, since it is not necessary for the operator to determine the weighing accuracy, the accuracy confirmation work process can be reduced. As a result, it is possible to perform accuracy confirmation using a plurality of samples while reducing the accuracy confirmation work process.

  In the weight measuring device according to the present invention, the true value acquisition unit acquires the true value by an input operation.

  With this configuration, since the true value of the sample can be set by an input operation, accuracy can be confirmed using an actual product or the like as a sample.

  In the weight measuring device according to the present invention, the true value acquisition unit acquires the true value from an external device.

  With this configuration, the true value measured by an external device such as a stationary scale can be directly acquired. This eliminates the need for a true value input operation.

  The weight measuring device according to the present invention includes an output interface (46) for outputting and storing the true value acquired by the true value acquiring unit to an external storage device.

  With this configuration, the true value can be stored in the external storage device via the output interface. Further, when the true value is acquired next, the true value can be acquired in a short time from an external storage device as an external device.

  In the weight measuring apparatus according to the present invention, the weighing control unit uses the number of true values acquired by the true value acquisition unit as a unit of batch processing, and the sample is repeatedly conveyed by the conveyance unit by a predetermined number of batch processes. And measuring with the measuring unit.

  With this configuration, a predetermined number of samples are used as a unit of batch processing, and repeated weighing is performed for the number of batch processings. Therefore, the number of samples can be reduced, and the time required for obtaining a true value can be shortened. Moreover, since more measurement results than the number of samples can be obtained, accuracy can be confirmed appropriately.

  In the weight measuring device according to the present invention, the sample is added with identification information capable of identifying the sample for each individual, and the true value acquisition unit acquires the true value and the identification information, The data management unit is characterized by associating a plurality of true values with a plurality of sample measurement values based on the identification information.

  With this configuration, for example, the relationship between the sample transport order and the sample identification information is defined, and the sample is transported and weighed in the defined order, so that the correspondence between the true value and the measured value of multiple samples can be achieved. You can keep the relationship.

  The weight measuring apparatus according to the present invention includes a reading unit (47) for reading the identification information from the sample.

  With this configuration, the identification information can be automatically read from the sample using the reading unit, so that the true value and the weighing value of a plurality of samples can be obtained even when the sample transport order does not match the order of the sample identification information. Can be maintained.

  The present invention can provide a weight measuring apparatus capable of performing accuracy confirmation using a plurality of samples while reducing the accuracy confirmation work process.

It is a figure which shows the external appearance of the capsule weight selection apparatus which concerns on one Embodiment of this invention, and is a perspective view which shows the state at the time of the door opening of a protective door. It is a figure which shows the external appearance of the capsule weight selection apparatus which concerns on one Embodiment of this invention, and is a perspective view which shows the state at the time of closing of a protective door. It is a side view which shows the internal structure of the capsule weight selection apparatus which concerns on one Embodiment of this invention. It is a block diagram which shows the control circuit of the capsule weight selection apparatus which concerns on one Embodiment of this invention. It is a conceptual diagram explaining the outline | summary of the accuracy confirmation operation | movement of the capsule weight selection apparatus which concerns on one Embodiment of this invention. It is a figure which shows the example of a screen display before the operation | movement start at the time of the precision confirmation operation | movement in the capsule weight selection apparatus which concerns on one Embodiment of this invention. It is a figure which shows the example of a screen display during operation execution at the time of the accuracy confirmation operation | movement in the capsule weight selection apparatus which concerns on one Embodiment of this invention.

  Embodiments of a capsule weight sorting apparatus according to the present invention will be described below with reference to the drawings. 1 to 7 show an embodiment of a capsule weight sorting apparatus according to the present invention.

  1 and 2, a capsule weight sorting device 1 as a weight measuring device is installed on the downstream side of a capsule-type tablet production line, and the weight of the object to be weighed W is set as the object to be weighed W. Is supposed to measure. A capsule-type tablet is a cylindrical capsule tablet in which a drug is enclosed and formed at both ends in a hemispherical shape. As a raw material of the object to be weighed W, gelatin, hydroxypropyl methylcellulose, or the like can be used. The object to be weighed W may be a non-capsule tablet or a food such as confectionery.

  In addition, the capsule weight sorting device 1 carries out an object to be weighed W whose measured value is within the reference range to the subsequent stage according to the measured value obtained by the measurement, and takes an object to be measured whose measured value is out of the reference range from the production line. It is supposed to be eliminated.

  The capsule weight sorting apparatus 1 includes an apparatus main body 2 and protective doors 3, 4, and 5 that can be opened and closed with respect to the apparatus main body 2. The protective door 3 is provided in the upper front part of the apparatus main body 2, the protective door 4 is provided in the lower front part of the apparatus main body 2, and the protective door 5 is provided in the side surface of the apparatus main body 2.

  The protective doors 3, 4, and 5 cover an inspection line 8, which will be described later, provided inside the apparatus main body 2. The protective doors 3, 4, and 5 are made of a transparent resin plate or the like, so that the operating state of the inspection line 8 can be confirmed from the outside through the protective doors 3, 4, and 5. The apparatus main body 2 is provided with door opening sensors 3A, 4A, and 5A for detecting the open state of the protective doors 3, 4, and 5, respectively.

  Three hoppers 6 for temporarily storing long capsule tablets or the like supplied from the upper production line as the objects to be weighed W are provided on the upper part of the apparatus main body 2. Three inclined plates 7 are provided on the front surface of the apparatus main body 2.

  The upper surface of the inclined plate 7 constitutes an OK product transport path 31, and this OK product transport path 31 is determined to be a non-defective product by the capsule weight sorting device 1 among the objects W stored in the hopper 6. Is carried out to a lower production line (packaging process or the like) (not shown) through an opening 4B formed in the protective door 4.

  In FIG. 3, the apparatus main body 2 is provided with a plurality of inspection lines 8 each having a transport unit 10 and a weighing unit 20. In the present embodiment, the apparatus main body 2 includes 30 inspection lines 8. The inspection line 8 is partitioned so as to be parallel to the conveyance direction of the object to be weighed W, and the object to be weighed W is conveyed by using the inspection line 8 as a conveyance path.

  The transport unit 10 includes a magazine 9, a supply unit 62, a buffer unit 64, a transport member 80, and a drive mechanism unit 61. The magazine 9 stores the objects to be weighed W supplied by its own weight from the bottom of the hopper 6 so that the long side direction is aligned in the vertical direction. And the magazine 9 opens and closes a lower end part with the stopper (not shown) in a lower end part according to periodic up-and-down movement, and intermittently feeds one to-be-measured object W from the lower end part to the supply part 62. Transport. In the present embodiment, the sorting unit 30 is provided on the downstream side of the buffer unit 64 in the transport direction.

  The supply unit 62 conveys the workpiece W supplied from the magazine 9 to the weighing unit 20. The weighing unit 20 includes a weighing table 21, weighs the object W transferred from the conveying unit 10 onto the weighing table 21, and outputs a measured value corresponding to the load of the object W to be weighed.

  The supply section 62 is provided with a curved concave portion 68 immediately below the magazine 9, and the object to be weighed W that has dropped from the magazine 9 lands on the curved concave portion 68, and its axis is directed obliquely upward in the transport direction. It is held in an inclined position.

  Further, a pusher 69 that is advanced in the transport direction is provided on the upstream side (right side in the drawing) of the curved recess 68, and the pusher 69 slides horizontally from the rear (right side in the diagram) of the curved recess 68. Thus, the workpiece W positioned in the curved recess 68 is sent to the weighing unit 20 on the downstream side in the transport direction.

  The weighing unit 20 is provided in the next process of the supply unit 62. The weighing unit 20 measures the weight of one object to be weighed by placing the objects to be weighed Wed out from the supply unit 62 on the weighing table 21 one by one.

  The placement surface 21A of the weighing platform 21 has a V-shaped cross section that is orthogonal to the transport direction. The weighing platform 21 is supported by the measuring device by a Roberval mechanism. The Roverval mechanism has a parallelogram framework in which each side can move freely.

  The weighing unit 20 is a weighing sensor in which a weighing table 21 is attached to one column of the frame and the other column is a fixed end. Thereby, the exact weight is measured no matter what position of the weighing table 21 the workpiece W is placed on.

  The measuring device has, for example, a load cell (not shown) as a weighing sensor. When the object to be weighed W is placed on the weighing platform 21, the weight of the object W to be weighed is measured by the electric signal of the load cell to which a load is applied. The weighing sensor is not limited to the load cell, and other various weighing sensors can be used.

  The buffer unit 64 is provided in the next step of the weighing unit 20, and separates and holds at least one object to be weighed W that has been measured. In the buffer unit 64, the object to be weighed W is placed in a stationary state substantially coincident with the measurement timing of the weighing unit 20.

  The buffer unit 64 includes a mounting table 65 that holds the workpiece W by mounting. In the present embodiment, a plurality of mounting tables 65 are formed in a staircase shape, and the objects to be weighed W are separated by each mounting table 65 and are transported intermittently.

  The sorting unit 30 is provided in the next process of the buffer unit 64. When the weighing object W is conveyed from the buffer unit 64, the sorting unit 30 switches the conveyance destination of the weighing object W based on the measurement result from the weighing unit 20.

  As described above, in the capsule weight sorting apparatus 1, the supply unit 62, the weighing unit 20, and the buffer unit 64 are disposed adjacently from the upstream side in the transport direction to the downstream side in the transport direction. In this embodiment, each of the supply unit 62, the weighing unit 20, and the buffer unit 64 is arranged flat in the horizontal direction, and a plurality of objects to be weighed W are intermittently and continuously conveyed one by one.

  The conveying member 80 is formed with a structure having a downward space such as an E-shape. In this configuration example, there are a plurality of claw portions that protrude downward, and the rear claw portion 81, the middle claw portion 82, and the front claw portion 83 hang downward from the upstream side in the transport direction, for example, bending a metal plate Manufactured as an integral structure by processing.

  Between the middle nail | claw part 82 and the front nail | claw part 83, it becomes the space which can accommodate the to-be-measured object W in the axial direction. More specifically, this space is set such that the middle claw portion 82 and the front claw portion 83 are separated so that the object W can be accommodated with sufficient margin in the axial direction. The separation distance between the middle claw portion 82 and the front claw portion 83 is set to be equal to or slightly longer than the length of the weighing platform 21 in the transport direction.

  The conveying member 80 can prevent the workpiece W from escaping and jumping out by the rear claw portion 81, the middle claw portion 82, the front claw portion 83, and the upper wall portion 84. Further, a gap 85 is provided between the middle nail portion 82 and the rear nail portion 81.

  The gap 85 is a space for separating the objects to be weighed W one by one, and a plurality of objects to be weighed W are intermittently conveyed without contact with each other. 62, the weighing unit 20 and the buffer unit 64 are reliably placed on the weighing object W, and when the weighing object W in the loaded state is started to be transported, the claw portions 81 between the weighing objects W, A space that allows 82 and 83 to enter is formed.

  The front surface of the middle claw portion 82 presses the rear surface of the weighing unit 20 in the transport direction of the object W to carry the object W placed on the weighing unit 20 from the weighing unit 20.

  The front surface of the front claw part 83 presses the rear surface in the transport direction of the object W to be weighed placed on the buffer part 64 adjacent to the weighing part 20, and the object W of the buffer part 64 is moved to the weighing part 20 of the buffer part 64. Is transferred from the mounting table 65 adjacent to the next mounting table 65.

  The rear surface of the rear claw part 81 is spaced upstream of the front surface of the middle claw part 82 in the transport direction. The rear surface of the rear claw portion 81 restricts the weighing object 20 from projecting toward the conveying direction side from the curved concave portion 68 of the next object to be weighed W that is dropped into the curved concave portion 68.

  In addition, the rear surface of the rear claw portion 81 is moved to the next object coming from the curved recess 68 when the object W on the weighing unit 20 is pushed out to the buffer portion 64 as the next process portion by the front surface of the middle claw portion 82. The protruding from the measuring unit 20 to the downstream side is regulated so that the weighing object W stays in the measuring unit 20.

  The rear surface of the front claw portion 83 has a mounting table 65 adjacent to the weighing unit 20 so that the next object to be weighed W conveyed to the buffer unit 64 remains on the mounting table 65 adjacent to the weighing unit 20 of the buffer unit 64. And jumping out to the mounting table 65 on the downstream side is restricted. In the present embodiment, the downstream side in the transport direction of the front claw portion 83 is the front surface of the front claw portion 83, and the upstream side in the transport direction of the front claw portion 83 is the rear surface of the front claw portion 83.

  The conveying member 80 moves on a substantially square circulation track 86 by a drive mechanism unit 61 described later. The circulation trajectory 86 includes a feed trajectory in which the moving trajectory for transporting the workpiece W by the transport member 80 is set in the horizontal direction, a separation trajectory separating from the feed trajectory, and a return trajectory for horizontally moving the transport member 80 to the lowered position. And a descending track that moves the conveying member 80 down on the weighing platform 21 from the lowered position, which is the end of the return track, and moves it to the starting point of the feeding track.

  The feed trajectory overlaps with the linear transport trajectory of the workpiece W. Thereby, the conveyance member 80 cuts out the to-be-measured object W on a conveyance track | truck from the measurement part 20 so that it may scrape out from upper direction, and conveys it to the buffer part 64. FIG. Therefore, it is not necessary to project any feeding means from the lower side of the conveyance track. As a result, there is no interference with the weighing platform mechanism of the weighing device.

  The drive mechanism unit 61 includes a motor 78 that is a drive source and a link 79 that is linked to the motor 78. The drive mechanism unit 61 conveys the workpiece W received from the hopper 6 from the supply unit 62 to the weighing unit 20.

  Further, the drive mechanism unit 61 conveys the measured object W to the buffer unit 64 and the sorting unit 30. Moreover, the gate which will be described later is driven so that the sorting unit 30 switches the transport destination of the object W to be weighed.

  Further, the drive mechanism unit 61 drives the conveying member 80 with the circulation track 86. The conveying member 80 is driven by the drive mechanism unit 61, so that the conveying member 80 is moved so that a part of the circulation track 86 is overlapped with the conveying track of the object W to be weighed.

  The link 79 of the drive mechanism unit 61 is linked to the pusher 69 of the supply unit 62 and the stepped mounting table 65 of the buffer unit 64 by a mechanism (not shown), and the transport member 80 is linked to the link member by a connecting member (not shown). These are driven synchronously.

  A transport operation of the transport unit 10 having the above configuration will be described. In the capsule weight sorting apparatus 1 according to the present embodiment, first, the unloading of the object to be weighed W placed on the weighing table 21 of the weighing unit 20 is started by the feeding track of the conveying member 80.

  At the same time, the pusher 69 pushes the next object to be weighed W from the supply unit 62 toward the weighing table 21. At this time, the conveying member 80 starts to carry out the object W to be weighed from the buffer unit 64. The conveyance member 80 pushes the rear surface in the conveyance direction of the object W on the weighing platform 21 with the front surface of the middle claw portion 82, and pushes the rear surface in the conveyance direction of the object W on the buffer portion 64 with the front surface of the front claw portion 83. , Carry out each.

  Thereafter, the object to be weighed W on the weighing platform 21 and the object to be weighed W on the mounting table 65 are in the process of being carried out by the conveying member 80. Thereafter, the conveyance member 80 and the pusher 69 move in the conveyance direction, so that the object W to be weighed on the weighing platform 21 is in the middle of conveyance to the buffer unit 64, and the object to be weighed W on the supply unit 62 is conveyed to the weighing table 21. On the way.

  When the transport member 80 and the pusher 69 are further moved in the transport direction, the object W to be weighed on the weighing platform 21 reaches the buffer unit 64. Further, the next object W to be weighed in the supply unit 62 reaches the weighing platform 21.

  Thereafter, the object W to be weighed on the mounting table 65 adjacent to the weighing unit 20 of the buffer unit 64 is conveyed to the next mounting table 65, and the next object to be weighed W is mounted on the weighing table 21 by the pusher 69. . The object to be weighed W placed on the weighing platform 21 is placed on the placing table 65 adjacent to the weighing unit 20 of the buffer unit 64 by the transport member 80.

  When the weighing object 21 is placed on the weighing table 21 and the loading table 65 adjacent to the weighing unit 20 of the buffer unit 64, the weighing object W on the weighing table 21 is measured. At this time, the transport member 80 becomes a separation track of the circulation track 86, moves upward, and retreats from the transport track.

  During the measurement of the next object to be weighed on the weighing platform 21, the next object to be weighed W is further supplied from the upstream side in the conveying direction to the supply unit 62, and the conveying member 80 passes through the return path and passes through the object to be weighed on the weighing platform 21. It reaches above the weighing object W.

  The object to be weighed W supplied to the supply unit 62 is conveyed to the weighing unit 20 by the pusher 69, and thereafter the same operation as described above is repeated.

  Accordingly, the weighing object W of the supply unit 62 is conveyed toward the weighing unit 20, and the weighing object W of the weighing unit 20 is unloaded from the weighing unit 20 by the front surface of the middle claw portion 82 of the conveying member 80. It is conveyed to. These conveyances are performed synchronously.

  In this capsule weight sorting device 1, the weighing object W can be reliably kept in the weighing unit 20 without providing a shutter for preventing the popping out, the conveyance speed can be increased, and the weighing object W is weighed. The platform 21 can be stopped accurately and stable weighing can be performed, and jumping of the workpiece W carried out of the weighing unit 20 to the downstream side in the transport direction can be restricted.

  The sorting unit 30 includes an OK product transport path 31, an NG product transport path 32, and an OK / NG gate 23. The OK / NG gate 23 closes the dropping port 33 to switch the transport destination of the object to be weighed W, and drops the object W to the OK product transport path 31 or the NG product transport path 32. Note that the OK / NG gate 23 is configured such that, for example, one end rotates around a rotation axis, and a rotary lid mechanism that opens and closes the drop opening 33 or a linear reciprocating motion along the drop opening 33 causes the drop opening 33 to move. A slide lid mechanism that opens and closes can be used.

  As shown in FIG. 4, the capsule weight sorting device 1 includes a control circuit 40. The control circuit 40 includes a determination unit 43. The determination unit 43 compares the measurement value of the measurement unit 20 of each inspection line 8 with a predetermined weight range, so that the object W to be measured is an OK product or an NG product. Any one of the determinations is performed, and the determination result is displayed on the touch panel display 50.

  The determination unit 43 determines that the measured value of the object to be weighed W is within a predetermined non-defective range as an OK product. The control circuit 40 switches the OK / NG gate 23 to the OK position according to the determination of the OK product. As a result, the weighed object W passes through the OK product conveyance path 31.

  On the other hand, the determination unit 43 determines that the measurement value of the object to be weighed W is out of the predetermined non-defective product range as an NG product. The control circuit 40 switches the OK / NG gate 23 to the NG position according to the determination of the NG product. As a result, the weighed object W passes through the NG product conveyance path 32.

  The control circuit 40 includes a mode switching control unit 42. The mode switching control unit 42 performs mode switching to the operation mode selected by the touch panel display 50 in response to a mode switching operation on the touch panel display 50. .

  The capsule weight sorting apparatus 1 has a normal operation mode for weighing, measuring quality, and sorting the object to be weighed W and an accuracy confirmation mode for confirming the weighing accuracy of the weighing unit 20.

  FIG. 5 is a conceptual diagram for explaining the outline of the accuracy check operation executed by the capsule weight sorting device 1 in the accuracy check mode.

  As shown in FIG. 5, in the accuracy confirmation mode, a standard value (measurement accuracy standard) is input to the capsule weight sorting device 1. In the accuracy check mode, a plurality of samples are used. For the plurality of samples, for example, a product (tablet or the like) actually inspected as the object to be weighed W can be used.

  In the accuracy check mode, true values for the number of samples of the plurality of samples are input to the capsule weight sorting device 1. The true value of the sample is a weight value of the sample that has been statically weighed in advance by an operator using a stationary scale or the like.

  In the accuracy confirmation mode, a plurality of samples are transported and weighed in the capsule weight sorting apparatus 1 to obtain a weighed value. A plurality of samples are prepared in a state of being loaded in the magazine 9 in advance. In the present embodiment, the accuracy check operation is performed using 10 samples. The weighing of the sample is repeated by a predetermined batch processing number (repetition count), with the accuracy check operation using the input true number of samples as batch processing (batch processing). For example, when the number of batch processes is set to 3, 10 samples are weighed in the first batch process, and then the sample is loaded again into the magazine 9 by the operator. Thereafter, 10 samples are weighed in the second batch process, and then the sample is loaded again into the magazine 9 by the operator. Similarly, the sample is weighed in the third batch process. In this manner, by repeating the weighing of the sample by the number of batch processes, a weight value corresponding to the number of samples × the number of batch processes can be obtained.

  Thereafter, in the accuracy confirmation mode, the repeat accuracy and the like are calculated using the true value and the measured value of the sample. Then, accuracy evaluation is performed by comparing the calculation result with the standard value, and a determination of accuracy evaluation is output.

  Here, in the operation confirmation mode, the true values of the plurality of samples are identified based on, for example, the order in which the true values are input. Further, the measurement values of the plurality of samples are identified based on, for example, the order in which the measurement is performed. In this case, it is required to keep the order of the samples loaded in the magazine when repeating weighing for the number of batch processing. For this reason, it is preferable to manage a sample by a sample number or the like for identification of a plurality of samples by an operator.

  In the capsule weight sorting apparatus 1 that performs such an accuracy check operation, the touch panel display 50 receives a standard value of weighing accuracy and a true value of the weights of a plurality of samples.

  In addition, the capsule weight sorting apparatus 1 includes an input interface 45, and the true value of the weight of a plurality of samples can be acquired via the input interface 45. Thus, the touch panel display 50 and the input interface 45 constitute a true value acquisition unit in the present invention.

  The control unit 41 controls the operation in the accuracy confirmation mode. The control unit 41 includes a measurement control unit 41A, a data management unit 41B, a statistic calculation unit 41C, and a matching result output unit 41D for operation in the accuracy check mode.

  The weighing control unit 41 </ b> A is configured to carry a plurality of samples by the carrying unit 10 and to weigh the sample by the weighing unit 20.

  The data management unit 41B associates a plurality of true values with a plurality of measurement values. Specifically, the data management unit 41B identifies a plurality of true values based on the acquisition order, identifies a plurality of measurement values based on the measurement order, and associates each order by matching them.

  The statistic calculation unit 41C calculates a statistic using each difference (instrument difference) between the measured value and the true value of the sample associated by the data management unit 41B as a data value. Specifically, the statistic calculation unit 41C uses the number of measurement values measured by the measurement unit 20 associated with the data management unit 41B as the number of data, and calculates the average value, standard deviation, maximum value, minimum value, and range. Calculated.

  The matching result output unit 41D determines whether or not the weighing accuracy of the weighing unit 20 matches the standard value based on the statistic calculated by the statistic calculating unit 41C, and outputs the determination result. Specifically, the adaptation result output unit 41D sets the standard of the measurement error as an allowable range, and determines whether or not the average value ± 3σ region is within the allowable range in the statistic calculated by the statistic calculation unit 41C. Judgment criteria are determined to be acceptable if they are within the allowable range, and are determined to be non-conforming if they are outside the allowable range.

  The output destination of the determination result by the adaptation result output unit 41D is the touch panel display 50 or the output interface 46. When the output destination of the determination result is the output interface 46, the matching result output unit 41D outputs the determination result data to the output interface 46 and transmits it to the external device.

  In the capsule weight sorting apparatus 1 according to the present embodiment, the touch panel display 50 as a true value acquisition unit acquires a true value by an input operation.

  In the capsule weight sorting apparatus 1 according to the present embodiment, the input interface 45 as a true value acquisition unit acquires a true value from an external device (not shown).

  The capsule weight sorting apparatus 1 further includes an output interface 46 that outputs and stores a true value acquired by the touch panel display 50 or the input interface 45 to an external storage device (not shown). This external storage device may be the same device as the external device that inputs a true value to the input interface 45. In the present embodiment, the measurement of the sample in the accuracy confirmation mode is repeatedly performed by a predetermined number of batch processes. The measurement control unit 41 </ b> A repeatedly conveys a plurality of samples by the conveyance unit 10 for the number of batch processes and causes the measurement unit 20 to measure the plurality of samples.

  Moreover, in the capsule weight selection apparatus 1, it is preferable that identification information that can identify the sample for each individual is added to the sample. The identification information is different information for each sample, such as numbers, characters, symbols, barcodes, colors, and the like. The sample identification information is input from the touch panel display 50 together with the true value of the sample. Alternatively, the sample identification information is input through the input interface 45 together with the true value of the sample. That is, the sample identification information is acquired using the touch panel display 50 or the input interface 45 together with the true value of the sample. Then, the data management unit 41B associates the true values with the order of the measurement values based on the acquisition order or the identification information. Thereby, the correspondence between the true value and the measured value can be maintained.

  Moreover, it is preferable that the capsule weight selection apparatus 1 includes a reading unit 47 that reads identification information from a sample. The reading unit 47 is provided in the transport unit 10 or the weighing unit 20 and reads identification information from a sample to be weighed in the accuracy check mode. The reading unit 47 optically reads the identification information of the sample, for example, and outputs the read identification information to the control unit 41. In this case, the measurement value can be associated with the true value by identifying the measurement value based on the identification information.

  As shown in FIGS. 6 and 7, the touch panel display 50 includes a status display area 110, an operation area 120, and a data display area 130.

  The status display area 110 is a strip-shaped area that is disposed at the upper end of the touch panel display 50 and extends to the left and right. In the status display area 110, the status of the apparatus is mainly displayed.

  The operation area 120 is an area in a strip state that is arranged at the lower end of the touch panel display 50 and extends to the left and right. In the operation area 120, operation buttons that can be operated are mainly displayed. In the example of FIGS. 6 and 7, a clear button 121 and an output button 122 are displayed in the operation area 120. The clear button 121 is a button for deleting the numerical value of each setting item. The output button 122 is a button for outputting the accuracy check result to the outside. When the output button 122 is pressed, the accuracy check result is output to the external device via the output interface 46. The external device is, for example, a recording medium such as a USB memory or a printer.

  The data display area 130 is an area arranged in the center of the touch panel display 50 and is an area sandwiched between the state display area 110 and the operation area 120. The data display area 130 displays information necessary for the current operation mode. The control unit 41 performs generation of display information and a response to the touch operation in the state display area 110, the operation area 120, and the data display area 130.

  When the capsule weight sorting device 1 is stopped in the accuracy check mode, as shown in FIG. 6, “accuracy check” and “stopped” are displayed in the status display area 110, and the device stops in the accuracy check mode. It indicates to the operator that it is inside.

  In FIG. 6, a guidance sentence “Perform accuracy check (line check). Press the start button and run the sample.” Is displayed at the top of the data display area 130 for accuracy check operation. The operator is guided to the matters to be implemented.

  A line group switching unit 132 is provided in the upper right part of the data display area 130. In the line group switching unit 132, three groups constituting the 30 inspection lines 8 are displayed in a square shape. Each group consists of 10 inspection lines 8. In the line group switching unit 132, the selected group is displayed with a bold line. The line group switching unit 132 can be switched to a desired group by touching the desired group.

  In addition, in the upper part of the data display area 130, the item name and each value of the measurement accuracy standard, the group number, the number of accuracy confirmation samples, and the number of accuracy confirmation batches (representing the number of batch processing) are displayed. The value of each item can be set. Here, the group number is a number for identifying a group when there are a plurality of groups of a plurality of samples.

  The left half of the data display area 130 displays the line numbers of 1 to 10 inspection lines 8 and the item names of the measurement accuracy of each inspection line 8. The values of these measurement accuracy items and the accuracy confirmation results are blank in FIG. When the operation is started in the accuracy check mode, the data display area 130 sequentially displays the value of the measurement accuracy item and the accuracy check result from the inspection line 8 in which the sample weighing is completed for the number of batch processes. Is done.

  In addition, a line selection unit 134 is provided in the right half of the data display area 130. The line selection unit 134 displays the line number of the selected inspection line 8 (line number 1 is being displayed). The line selection unit 134 displays a pair of left and right arrows, and the inspection line 8 can be switched by a touch operation on the arrows. Further, in this area, specific numerical values related to accuracy confirmation in the selected inspection line 8 are displayed together with the item names. This item name includes the current value, the measured number, X-bar, S, R, Max, Min, true value, measured value, and instrumental error. The instrumental difference is the difference between the true value and the measured value, and the numerical values corresponding to X-bar, S, R, Max, Min are the average value, standard deviation, range, maximum value, minimum value calculated by the statistic calculation unit 41C. It is a value. In FIG. 6, only the true value of the sample is displayed, and the numerical values of the other items are blank.

  In FIG. 6, sample numbers 1 to 5 are displayed, but sample numbers 6 to 10 are displayed by scrolling in the vertical direction. These numerical values relating to the inspection line 8 with the line number 1 are blank in FIG. In this state, the magazine 9 is loaded with a sample in advance before the operation is started.

  When a start button (not shown) is pressed in the state of FIG. 6, the operation is started in the accuracy check mode, and the sample loaded in the magazine 9 is transported and measured. And, as shown in FIG. 7, from the inspection line 8 in which the processing of all the batch processes for sample weighing is completed, the measured value, the difference from the true value (instrument difference column), and the measurement accuracy are displayed, The accuracy check result is displayed in conforming or non-conforming characters. At the end of one batch process, a guide such as “Please reload sample” is displayed.

  In the present embodiment, the case where the present invention is applied to the capsule weight sorting device 1 as a weight measuring device has been described. However, the present invention conveys an object to be weighed, such as food, having a relatively heavy mass by a conveyor. The present invention can also be applied to a weighing device for weighing.

  As described above, the capsule weight sorting apparatus 1 according to this embodiment includes the touch panel display 50 and the input interface 45 serving as a true value acquisition unit that acquires the true values of the weights of a plurality of samples, and the accuracy check mode. And a control unit 41 that controls the operation.

  In addition, the control unit 41 transports a plurality of samples by the transport unit 10 and weighs the sample by the weighing unit 20, a data management unit 41B that associates a plurality of true values and a plurality of sample measurement values, A statistic calculating unit 41C that calculates a statistic based on the difference between the measured value and the true value of each sample, which is associated with the data management unit 41B, and a measuring unit 20 based on the statistic of the statistic calculating unit 41C. And a conformity result output unit 41D that determines whether or not the measurement accuracy conforms to a standard value and outputs a determination result.

  With this configuration, for example, the difference between the measured value and the true value can be obtained between the same samples by transporting and weighing a plurality of samples in the same order as the acquisition order of the true value. Based statistics can be calculated. For this reason, accuracy confirmation can be performed using a plurality of samples. In addition, since it is not necessary for the operator to determine the weighing accuracy, the accuracy confirmation work process can be reduced. As a result, it is possible to perform accuracy confirmation using a plurality of samples while reducing the accuracy confirmation work process.

  In the capsule weight sorting apparatus 1 according to the present embodiment, the touch panel display 50 as a true value acquisition unit acquires a true value by an input operation.

  Since the true value of the sample can be set by an input operation, the accuracy can be confirmed using an actual product or the like as a sample.

  In the capsule weight sorting device 1 according to the present embodiment, the input interface 45 as a true value acquisition unit acquires a true value from an external device.

  With this configuration, the true value measured by an external device such as a stationary scale can be directly acquired. This eliminates the need for a true value input operation.

  Moreover, the capsule weight selection apparatus 1 according to the present embodiment includes an output interface 46 that outputs and stores the true value acquired by the touch panel display 50 or the input interface 45 to the external storage device.

  With this configuration, the true value can be stored in the external storage device via the output interface 46. Further, when the true value is acquired next, the true value can be acquired in a short time from an external storage device as an external device.

  Further, in the capsule weight sorting apparatus 1 according to the present embodiment, the weighing control unit 41A uses the number of true values acquired by the touch panel display 50 or the input interface 45 as a true value acquisition unit as a unit of batch processing, and samples. Then, a predetermined number of batch processes are repeatedly conveyed by the conveying unit 10 and are weighed by the weighing unit 20.

  With this configuration, a predetermined number of samples are used as a unit of batch processing, and repeated weighing is performed for the number of batch processings. Therefore, the number of samples can be reduced, and the time required for obtaining a true value can be reduced. Moreover, since more measurement results than the number of samples can be obtained, accuracy can be confirmed appropriately.

  Further, in the capsule weight sorting apparatus 1 according to the present embodiment, identification information capable of identifying the sample for each individual is added to the sample, and the touch panel display 50 or the input interface 45 displays the true value and the identification information. To get. Then, the data management unit 41B associates a plurality of true values with a plurality of sample measurement values based on the identification information.

  With this configuration, for example, the relationship between the sample transport order and the sample identification information is defined, and the sample is transported and weighed in the defined order, so that the correspondence between the true value and the measured value of multiple samples can be achieved. You can keep the relationship.

  Moreover, the capsule weight sorting apparatus 1 according to this embodiment includes a reading unit 47 that reads identification information from a sample.

  With this configuration, since the identification information can be automatically read from the sample using the reading unit 47, the true value and the measurement value of a plurality of samples can be obtained even when the order of transporting the samples does not match the order of the identification information of the samples. Can be maintained.

  As described above, the weight measuring device according to the present invention has the effect of being able to perform accuracy confirmation using a plurality of samples while reducing the work process of accuracy confirmation, and using a plurality of inspection lines. It is useful as a weight measuring device for weighing an object.

1 Capsule weight sorting device (weight measuring device)
DESCRIPTION OF SYMBOLS 10 Conveyance part 20 Weighing part 41 Control part 41A Weighing control part 41B Data management part 41C Statistics calculation part 41D Conformity result output part 45 Input interface (true value acquisition part)
46 Output interface 47 Reading unit 50 Touch panel display (setting unit, true value acquisition unit)
W Object to be weighed

Claims (7)

A weight measuring device comprising: a transport unit (10) for transporting an object to be weighed; and a weighing unit (20) for measuring an object to be weighed by the transport unit and outputting a measurement value,
A mode switching control unit (42) for switching the operation mode to a normal operation mode or an accuracy confirmation mode for confirming the weighing accuracy of the weighing unit;
A setting unit (50) for inputting a standard value of the weighing accuracy;
A true value acquisition unit (50, 45) for acquiring the true values of the weights of the plurality of samples;
A control unit (41) for controlling the operation in the accuracy check mode,
The controller is
A weighing control unit (41A) for transporting the plurality of samples by the transport unit and weighing the samples by the weighing unit;
A data management unit (41B) for associating a plurality of true values with a plurality of sample measurement values;
A statistic calculation unit (41C) that calculates a statistic based on the difference between the measured value and the true value of each sample associated with the data management unit;
A matching result output unit (41D) for determining whether or not the weighing accuracy of the weighing unit is compatible with the standard value based on the statistics of the statistic calculation unit, and outputting a determination result; A characteristic weight measuring device.   The weight measurement apparatus according to claim 1, wherein the true value acquisition unit acquires the true value by an input operation.   The weight measuring apparatus according to claim 1, wherein the true value acquisition unit acquires the true value from an external device.   The weight measuring device according to any one of claims 1 to 3, further comprising an output interface (46) for outputting and storing the true value acquired by the true value acquiring unit to an external storage device. .   The measurement control unit uses the number of true values acquired by the true value acquisition unit as a unit of batch processing, and causes the measurement unit to repeatedly convey the sample by the predetermined number of batch processing by the conveyance unit. The weight measuring device according to any one of claims 1 to 4, wherein Identification information that can identify the sample for each individual is added to the sample,
The true value acquisition unit acquires the true value and the identification information,
6. The weight measuring device according to claim 1, wherein the data management unit associates a plurality of the true values with a plurality of measured values of the samples based on the identification information. .   The weight measuring device according to claim 6, further comprising a reading unit (47) for reading the identification information from the sample.

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