JP5862001B2 - Picking system - Google Patents

Description

  The present invention relates to a picking system that takes out a predetermined number of articles from a predetermined display shelf based on an instruction from an upper management apparatus and puts them into a container mounted on a movable cart.

  While moving a picking cart equipped with a data receiving means and a display means in a warehouse where a large number of article displays are arranged, the data receiving means receives instruction data transmitted from a host management device and displays it on the display means A picking system for picking an article based on the displayed instruction data is known. In such a picking system, the picking instruction for the next product is received, the picking cart is moved to the instructed location, and the number of products instructed at the destination is placed on the weighing unit of the cart. It is put into the container where it is placed, and when the work is completed, the weighing unit is reset to zero. In this way, by resetting the weighing unit to zero, the number of the added products can be correctly calculated based on the weight of the product added to the container in response to the next instruction and the unit weight. However, when one product is finished and the next instruction product is put in, depending on, for example, the arrangement state of the product in the container and the shape or material of the next product to be put in before the next product is put into the container In some cases, after the cushioning material is inserted, the next product is introduced.

In this way, since the cushioning material may be inserted before the next product is put into the container, the weight value is reset to zero again before the next product is put into the container, and then the next product is loaded. By putting it in the container, even if a cushioning material or the like is put in before putting the next product into the container, the correct number of products put in next is calculated from the weight value output by the weighing unit. It becomes possible.
JP 2004-188242 A

  However, if the weighing unit is reset to zero immediately after moving the cart after receiving the picking instruction for the next product as described above, it can not be reset to zero unless it waits until the weighing unit stabilizes immediately after moving, Depending on the product, it may not be necessary to insert a cushioning material or the like, but in the past, the weighing unit was always reset to zero before the next picking operation, so that there was a problem that the picking operation could not be performed quickly.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a picking system that can quickly perform a picking operation.

In order to solve the above problems, the present invention comprises a movable cart, a container placed on the cart, and weighing means provided corresponding to the container, and is based on picking instruction information instructed from a host device. In a picking system for putting an instructed article into a container, a first reset means for resetting a weight value measured by the weighing means when a picking operation relating to the instructed article is completed, and after resetting the first reset means Thus, before executing the picking operation for the next article, the weight value increases more than when the weight value is reset by the first resetting means, and the increased weight value is greater than the article to be picked next. When judging that the weight is lighter than the next picked article by the judging means for judging whether or not it is lightweight. Seen, the second reset means for resetting the weight value weighed by the weighing means, you comprising the.
Or the present invention includes a cart movable, and the placed container to the cart, with a metering means arranged in correspondence with the container, it indicated on the basis of the picking instruction information instructed from the host device article In the picking system for charging the container into the container, when the picking operation relating to the instructed article is completed, a first reset means for resetting the weight value weighed by the weighing means, and the next article after the reset of the first reset means Before executing the picking operation, the determination means for determining whether or not the weight value is increased as compared with the case where the weight value is reset by the first reset means, and the determination means determines that the weight has increased. The second reset means for resetting the weight value weighed by the weighing means and the increased weight value that allows the execution of the second reset means are set only when That the weight increase value setting means comprises a, in the following cases set increase the weight value with increasing weight value increases weight value setting means, and executes a second resetting means.

  Here, resetting the weight value means that an article is put into the container mounted on the weighing means for each piece of picking instruction information, and the weight value at the time when the introduction of the article of one picking instruction information is completed is set as a fixed value. The weight of the next item may be set as a delimiter weight, or so-called zero reset may be performed in which the weight of the item at that time is tared together with the container to zero.

  Further, as the means for executing the first resetting means, for example, it may be executed when the operator depresses a key declaring the completion of the work, or the weight corresponding to the designated number is used. It may be automatically executed when it is determined that the indicated number of products are output from the weighing means and placed in the container.

  In addition, even when the determination means is executed at the same time as the barcode of the next product instructed is read, for example, a key for declaring the picking start is provided, and the key is set to the next product. It may be determined whether the weight has increased after the first reset by pressing the button before putting it into the container.

  In the picking system, the present invention further includes a confirmation unit that reads a barcode of a product and determines whether the read product data matches the product data indicated by the picking instruction information. Is characterized in that the determination is performed when the confirmation means executes the determination.

  In the picking system, the present invention has a plurality of containers and weighing means corresponding to the containers so as to be identifiable, and the picking instruction information includes identification information of a container into which an article is placed among the plurality of containers. Whether or not the weight value of the weighing means corresponding to the container included in the picking instruction information is higher than that when the weight value is reset by the first resetting means. The second reset means determines and resets the weight value of the weighing means corresponding to the container included in the picking instruction information.

  According to the invention of claim 1, when the work is completed, the weighing means is normally reset by the first resetting means in a state where the cart is not moved and is stable. Furthermore, after the cart is moved, the weight value output from the weighing means is reset by the second resetting means after the cart is moved only when the weight is increased due to the insertion of cushioning material or the like. When the weight has not increased (when the cushioning material or the like is not inserted), the weight value output from the weighing means is not reset by the second reset means, so that it is not necessary to wait for an unnecessary reset operation time, and it can be done quickly. Picking work can be performed.

According to the invention of claim 3 , when the barcode of the product is read and it is determined whether or not the instructed product data and the product for which the picking operation is to be started match, the weight after the first reset is determined. Since it is determined whether the weight has increased, there is no need to separately perform an operation for confirming whether the weight has increased, and the operability is improved without forgetting to perform the operation.

According to the invention of claim 4 , even when there are a container and a plurality of weighing means corresponding to the container in the cart, only the weighing means corresponding to the container instructed to be loaded is weighted by the first resetting means. Since the second reset means is controlled to reset the weight value of only the weighing means corresponding to the container included in the picking instruction information, it is determined whether or not the weight value is increased compared to when the is reset. Only the necessary weighing means are reset, the processing becomes faster, and quick picking work becomes possible.

According to the invention of claim 2, following the case of setting the weight value or set by the increased weight value increases weight setting means, so to stop the execution of the second reset means, prior to placing the example cushioning material like you've put of picking goods, based-out weight values to the wrong weight value can be prevented that would be reset.

It is a figure which shows the structural example of the picking cart used for the picking system which concerns on this invention. It is a figure which shows the whole system structure of the picking system which concerns on this invention. It is a figure which shows the system configuration | structure of a picking cart. It is a figure which shows the example of the instruction data which instruct | indicates the picking which a picking cart receives. It is a figure which shows the operation flow of a picking operation | work. It is a figure which shows the example of a display of the display part of a picking cart. It is a figure which shows the example of a display of the initial screen of the display part of a picking cart. It is a figure which shows the example of a display of the display part of the picking cart in a picking operation | work.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. For picking goods (goods), so-called picking-type picking in which goods are lined up on display shelves in a warehouse, the designated goods are taken out from the display shelves, and stored in a container mounted on the cart, There is a so-called seeding type picking in which an article (product) is placed and a shelf is divided, for example, for each delivery destination, and the article is placed in the shelf. Used for picking picking.

  In addition, daily goods are picked mainly by orders from supermarkets, etc., and commodities that are handled daily goods are heavier than the weight of cushioning material used at one time, which will be described later. In addition, since the cushioning material is laid in a container in the cart, it is light weight of about 10 g or less when used once. Further, as a cushioning material, a necessary amount of so-called bubble wrap (registered trademark) or the like in which numerous bubbles enclosing air with a polyethylene film are formed into a sheet shape is used.

  1A and 1B are diagrams showing a configuration example of a picking cart used in the picking system according to the present invention. FIG. 1A is a side view and FIG. 1B is a front view (viewed from the direction of arrow A). As shown in FIG. 1, one picking cart 10 is partitioned into two upper and lower stages, and two platform scales 11 and 12 are provided in the lower stage, and two platform scales 13 and 14 are provided in the upper stage. Although illustration is omitted, each of the platform scales 11 to 14 can be equipped with containers 41 to 44 for storing picked articles such as folding containers.

  The picking cart 10 is provided with a handle 15 for pushing, and in front (front) of the handle 15, the operator can see various data such as instruction data for picking while pushing the picking cart 10. One display unit 16 is provided. A second display unit 17 is provided on the side of the picking cart 10 so that various data such as instruction data can be viewed while performing the picking operation. A printer 18 is provided on the upper side of the picking cart 10. The printer 18 can issue a label to be attached to a container that accommodates the picked article. Although not shown, an antenna for communicating with a higher-level management device is provided in the first display unit 16. Further, although not shown, a scanner is provided for reading a barcode of an article to be picked.

  FIG. 2 is a block diagram showing a system configuration example of the picking system according to the present invention. Each of the picking carts 10-1, 10-2,... 10-n can communicate with the management apparatus 100 via the wireless router 101. The wireless router 101 is an access point having a router function, and can be simultaneously connected to the wireless LAN 102 and a wired LAN (not shown).

  FIG. 3 is a block diagram showing a system configuration of the picking cart 10. The picking cart 10 includes a CPU 20, a RAM 21, a ROM 22, a first display unit 16, a second display unit 17, a charging power supply unit 23, a communication unit 24, a first weighing unit (base scale 13) 25, and a second weighing unit (base scale 14). 26, a third weighing unit (table scale 11) 27, a fourth weighing unit (table scale 12) 28, a scanner 30, a printer 18, and a speaker unit 31. The CPU 20 executes various calculations and controls each part of the picking cart 10. The RAM 21 stores data read by the CPU 20, flags and registers used when the CPU 20 performs processing, instruction data for picking transmitted from the management device 100, and the like. 2 has a region for storing a weight value obtained by subtracting a preset tare weight of the container from the measured value output from the weighing unit 26, the third weighing unit 27, and the fourth weighing unit 28. The ROM 22 stores a program for operating the CPU. When each weighing unit is stabilized, a weight value obtained by subtracting the tare weight for the container from the stable weight value at regular time intervals is stored in the RAM 21. Are programmed to be stored in the respective areas.

  As shown in FIG. 1, the first display unit 16 is provided in front of (in front of) the handle 15 and is configured as a liquid crystal touch panel. The second display unit 17 is provided on the side surface of the picking cart 10 and is configured as a liquid crystal touch panel in the same manner as the first display unit 16. The charging power supply unit 23 supplies power to each device mounted on the charged picking cart 10. As shown in FIG. 2, the communication unit 24 communicates with the upper management apparatus 100 via the wireless LAN 102. The scanner 30 is provided for reading a barcode attached to an article. The first weighing unit 25 to the fourth weighing unit 28 are equipped with containers 41 to 44 for storing the picked items such as the folding type as described above. Further, the printer 18 prints and issues a label to be attached to each container and a picked result. The speaker unit 31 is provided to notify an error by sound.

  A container No. mounted on each weighing unit (base scale) of the picking cart 10 indicates one delivery destination. Based on a large amount of order data received from a large number of stores or the like, the upper management device 100 generates instruction data that can be efficiently picked when the picking work is performed with the same picking cart 10. It transmits to each picking cart 10.

  FIG. 4 shows an example of instruction data for instructing the biking received by the picking cart 10. As shown in the figure, the instruction data includes “container No”, “location No.”, “product name”, “JAN code (barcode information)”, “total number of instructions”, “number of pieces”, “unit weight ( g) ”,“ case tare weight ”,“ reference number ”,“ delivery destination information ”, and“ article input position ”. Here, “unit weight (g)” is a unit weight of an article to be picked.

  The “article input position” is information indicating in which container the specified article for each instruction data is to be input. The upper stage balance 13 (first weighing unit 25) on which the container of the picking cart 10 is mounted is "A", the stage balance 14 (second weighing unit 26) is "B", and the lower stage balance 11 (third weighing unit 27). ) Is “C”, and the platform scale 12 (fourth measuring section 28) is “D”. “Location No.” is assigned by position information indicating the position where the article is arranged so that the position of each shelf and the article in the shelf can be specified according to a certain rule in the warehouse. Since each worker is familiar with the location information, the destination can be understood by looking at the location information displayed on the display units 16 and 17. Further, since the location information is printed and pasted on a label or the like so that the location information is visible, each shelf can be moved to the designated shelf by looking at the label.

  One article (product) is identified for each instruction data (one line in FIG. 4), and the JAN code, the total number of instructions, the number of articles stored in the case, the unit weight of the article, the case A unit weight, a reference number for subtraction or addition display form, and article input position information (A, B, C, D) are set. That is, it is included in the instruction data that the product name shampoos A, B, and C in the top row are placed on the container A, that is, on the first lightweight part 25.

  FIG. 5 is a diagram showing an operation flow of the picking work. First, before the picking operation is started, the first display unit 16 of the picking cart 10 displays “person number”, “person name”, “password”, “switch key”, “ten-key” as shown in FIG. "Is displayed. First, in step ST1, when the person in charge of picking inputs the person-in-charge number, the input of the person-in-charge number is accepted, and the first display unit 16 has location information, product name, etc. as shown in FIG. An initial screen in which no information is displayed is displayed in the location / product information area to be displayed, the instruction data area in which instruction data is displayed, and the container information area indicating each container, and the process proceeds to step ST2. . In step ST2, a signal indicating that the “start” key displayed in FIG. 7 is pressed is received.

  When the “start” key is pressed, the CPU 20 requests instruction data from the management apparatus 100 via the communication unit, and the CPU 20 performs picking from the management apparatus 100 via the communication unit 24, for example, as shown in FIG. The instruction data is received, and the instruction data is stored in a predetermined area of the RAM 21. In step ST3, four labels for each container number of the instruction data are issued from the printer 18. Each label corresponds to each container, and the mounting positions A, B, C, and D are printed at the corners of the four labels to be issued. Since the upper row of the picking cart 10 is predetermined as A and B, and the lower row is determined as C and D, the worker (person in charge) puts the issued label on the side surface of the container at the mounting positions A, B, C, and D. paste. Each pasted label is printed with the store name and branch of the delivery destination based on the delivery destination information set for each container No. of the picking instruction data, as well as each container No. and container mounting position information ( A, B, C, or D) is bar-coded and printed.

  Barcodes indicating A, B, C, and D are attached to the locations of the containers of the picking cart 10. In step ST4, the barcode of the label attached to the container in step ST3 and the barcode printed on the label attached to the A position of the picking cart 10 are read by the scanner 30, and the container position is not wrong. Is confirmed. In the same manner as described above, the barcode printed on the label attached to the B, C, D position of the picking cart 10 and the label attached to the side surface of the container mounted at the B, C, D position are printed. The scanned barcode is read by the scanner 30, and it is confirmed whether the container position is correct.

  When the confirmation of the association of all the containers A, B, C, and D in step ST4 is completed, the process proceeds to step ST5. In step ST5, the first instruction of the instruction data received in step ST2 above, for example, “Shi A-201” which is the location information of the instruction data in the highest row among the received data shown in FIG. The name “shampoo A, B, C”, the indicated number 35, the indicated number “35” and the position “A” of the product input container are displayed at the position where the position “A” of the container into which the product is to be input is displayed. The display number “35” is displayed on both the first display unit 16 and the second display unit 17 at the position.

  Then, the weight value of the weighing unit corresponding to the input position information of the article included in the instruction data when the instruction data is received is specified from the RAM 21. The uppermost instruction data in FIG. 4 is instruction data for putting a product into the container position “A”, and therefore the weight of the first weighing unit 25 is specified. In this case, the weight obtained by subtracting the weight value of the container from the weight value output from each weighing unit as a tare is stored, but in this case, the product has not yet been input or the previous picking instruction has been completed, In ST16, the first reset is performed, and the weight value corresponding to the first weighing unit 25 specifies “0” g, and “0” g is temporarily stored in a predetermined area of the RAM 21. Then, the process proceeds to step ST6. In step ST6, the worker moves the picking cart 10 to the location displayed on the display unit, and the barcode attached to the article located at the location is read by the scanner 30, and the process proceeds to step ST7.

  Next, in step ST7, it is determined whether the JAN code of the instruction data received in step ST2 matches the JAN code read from the barcode attached to the article (product match). Displays an error message indicating that “the product is wrong” and returns to step ST6. If yes (Y), the process proceeds to step ST8. In step ST8, the weight value of the weighing unit specified and temporarily stored in step ST5 is compared with the weight value currently output from the first weighing unit 25 and stored in a predetermined area of the RAM 21, and the weight value increases. If it has not increased (N), the process proceeds to step ST12 described later, and if it has increased (Y), the process proceeds to step ST9. In this case, “0” g temporarily stored in step ST5 is compared with the current weight value of the first weighing unit 25 stored in a predetermined area of the RAM 21.

  In step ST9, since the weight value has increased, for example, it is determined that a cushioning material or the like has been introduced, and the weight obtained by taring the weight of the container output from the first weighing unit 25 is reset to zero. 2 is executed, and the process proceeds to step ST10. In the present embodiment, since it is determined from the operation that the instructed article is put into the container after the goods are confirmed in step ST6, the cushioning material is always put in when the weight is increased. . In step S10, a second reset is displayed on both the first display unit 16 and the second display unit 17, and the process proceeds to step ST11. In step ST11, after a lapse of a certain time from step ST11, the display during the second reset is deleted, and the process proceeds to step ST12.

  Here, “reset” means that an article is put into the containers 41 to 44 mounted on the weighing units 11 to 14 for each piece of picking instruction information, and every time the introduction of the article based on one piece of picking instruction information is finished, An article is loaded based on the picking instruction information, but the weight at the time when the loading of the article is completed by one picking instruction information is determined, and the weight for weighing the article based on the next picking instruction information is determined. However, in the present embodiment, a so-called zero reset is executed in which the weight value of the reset weighing unit is set to zero.

  In step ST12, a message for putting the instructed article into a container at a predetermined position (A position in this embodiment) is displayed on both the first display unit 16 and the second display unit 17, and the process proceeds to step ST13. In step ST13, the CPU 20 determines whether the weight value of the first weighing unit 25 stored in the RAM 21 is equal to a value obtained by multiplying the indicated number by the unit weight (determining whether the weight is correct). If the weight is correct (Y), a display prompting the completion key to be pressed is displayed on both the first display unit 16 and the second display unit 17, and the process proceeds to step ST15. If the weight is not correct (N), the process proceeds to step ST14, an error indicating that the number is not present is displayed, and the fact that the correct number is to be inserted is displayed on both the first display portion and the second display portion 17.

  In step ST15, when the completion key is pressed, the weight value related to the first weighing unit 25 stored in the RAM 21 is reset to zero (first reset). That is, the weight value of the first weighing unit 25 is set to zero, and the first weighing unit is set with both the product put in the first weighing unit 25 stored in the predetermined area of the RAM 21 and the weight of the container as a tare. Overwrite the weight value of 25 to zero and store. Also, “0” g specified and temporarily stored in step ST5 is cleared. In addition, data that has been worked at the corresponding location number is sent to the management apparatus 100. In this case, information on the total number of picking instructions is transmitted, and the result file of the management apparatus 100 is updated.

  Next, in step ST16, it is determined whether or not there is next instruction data in the instruction data received in step ST2 and stored in the RAM 21, and if there is (Y), the process proceeds to step ST5 and the above processing is repeated. If there is no instruction data (NO), the process proceeds to step ST17.

  In step ST17, the fact that all work has been completed is displayed on both the first display unit 16 and the second display unit 17, and an instruction is given to move the picking cart 10 to a predetermined position and to lower the container at the predetermined position. The

  As described above, when the completion key is pressed in step ST15, the weight value of the weighing unit corresponding to the container into which the product is put is reset to zero, but at this time, the work of putting the product into the container is finished. However, since the cart is stopped, the weighing unit is stable, and a quick zero reset process is possible.

  Returning to step ST5, when there is another picking instruction, the user moves to another location, and the bar code of the next product is read, the weight value increases from the weight value at the time of zero reset in step ST15. Only when it is determined in step ST8 that the buffer material has been inserted, the second reset is executed. As described above, the second reset executed after the transfer of the picking cart 10 is not executed for all commodities, but is executed only when the weight increases after the first reset. In other words, if an article or the like is not placed in the designated container between the first reset and the time when the barcode of the next product is read, the second reset is performed again because the weight has not increased. Since there is no need to execute, the next article can be put in without performing the process.

  In the operation flow of the picking work described in the example in which it is determined in step ST8 whether the weight value of the first weighing unit 25 has increased from zero, and if it has increased, the second reset is executed. For example, the amount of increase may be determined, and the second reset may be executed when the amount is less than a certain amount of increase. In this case, a cushioning material weight setting means for presetting the weight of the cushioning material assumed to be used is provided, and the increased weight value is equal to or less than the cushioning material weight value set by the cushioning material weight setting means Only the buffer material may be determined and the second reset may be executed. When the increased weight value is equal to or greater than the weight value set by the cushioning material weight setting means, it is determined that, for example, a product is inserted instead of the cushioning material, and a message to that effect is displayed. You may make it display on both the 1st display part 16 and the 2nd display part 17. FIG. In addition, for example, when determining whether the weight value has increased from zero, for example, a constant weight value may be shown due to, for example, wind, so an error range less than the weight of the cushioning material is provided. It may be determined that the amount of increase within the error range is not an increase in weight.

  The number of weighing units provided in the cart is not limited to four, and may be one or two, for example.

  In the operation flow of the picking work, the example in which the second reset unit is automatically executed when it is determined that the weight has increased in step ST8 has been described. When it is determined that the weight has increased in step ST8, a message is displayed on both the first display unit 16 and the second display unit 17 to press the switch. Based on this, the second reset may be executed when the reset execution switch is pressed.

  Moreover, you may make it provide the operation key which resets each measurement part provided in the cart to zero at arbitrary timings.

  Moreover, in the above embodiment, an example in which daily commodities are mainly handled as a product to be victed is shown, and an example in which the weight of the cushioning material used at one time is lighter than the weight of the product is shown. Even if there is a light product, as the operation of the picking work, by making sure to put the cushioning material in the container first and then put in the next product, the weight will be increased in step ST8 of the flow shown in FIG. Is it increasing? Therefore, the increased amount can be used as the buffer material, so that the correct picking operation can be performed even if the second reset is executed.

  It should be noted that a product file that defines a product to be picked is provided, and a flag indicating that the product should contain a cushioning material is set in addition to a JAN code for identifying the product and a price for each product. For example, in the case of a product that is easily broken or a product that is easily damaged, the flag is set. Then, when a picking instruction regarding the product to which the cushioning material is to be put into the cart container is transmitted and the barcode of the product is read, if the judging means judges that the weight has not increased, Please control the message to be displayed on the display. When the display is made, the cushioning material is inserted, and the weight increases, a key for resetting the weight is displayed on the display unit, and the second reset means is executed by pressing the key. .

  By doing this, even if an unfamiliar operator forgets to put in the cushioning material, a message prompting the user to put in the cushioning material is displayed, so the product will be thrown in after putting the cushioning material in. The product and other products can be reliably protected. Further, since the flag is set only for a product that requires a cushioning material, the above control is not executed for a product that does not require a cushioning material, so that a quick picking operation can be performed.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible.

  In the present invention, when the picking work completion declaration means is made by the picking work completion declaration means when the picking work is completed and the cart is stable without moving, the first resetting means performs zero reset. It is possible to speed up the picking operation, and after the cart is moved, the second reset means resets the zero after the cart is moved only when the cushioning material or the like is added to increase the weight value. Therefore, when no cushioning material or the like is inserted, zero resetting is not performed when the next product is scanned, so that the picking operation can be performed quickly, and the picking system can be used quickly.

DESCRIPTION OF SYMBOLS 10 Picking cart 11-14 Base scale 15 Handle 16 1st display part 17 2nd display part 18 Printer 20 CPU
21 RAM
22 ROM
23 Charging power supply unit 24 Communication unit 25 First measurement unit 26 Second measurement unit 27 Third measurement unit 28 Fourth measurement unit 30 Scanner 31 Speaker unit 100 Management device 101 Wireless router 102 Wireless LAN

Claims (4)

A movable cart, a container placed on the cart, and weighing means provided corresponding to the container are provided, and an instructed article is thrown into the container based on picking instruction information instructed from a host device. In the picking system,
First reset means for resetting the weight value weighed by the weighing means when the picking operation for the instructed article is completed;
After the resetting of the first resetting means and before the picking operation of the next article is performed, the weight value is increased and the weight increased when the weight value is reset by the first resetting means. Determining means for determining whether the value is lighter than the next picked article;
A second reset unit that resets the weight value measured by the weighing unit only when it is determined by the determining unit that the weight of the lighter weight than the next picked article is increased;
A picking system characterized by comprising: A movable cart, a container placed on the cart, and weighing means provided corresponding to the container are provided, and an instructed article is thrown into the container based on picking instruction information instructed from a host device. In the picking system,
First reset means for resetting the weight value weighed by the weighing means when the picking operation for the instructed article is completed;
After the reset of the first reset means, it is determined whether or not the weight value has increased compared to when the weight value was reset by the first reset means before executing the picking operation of the next article. A judgment means to
A second reset unit that resets the weight value measured by the weighing unit only when the determination unit determines that the weight is increased;
An increased weight value setting means for setting an increased weight value that allows execution of the second reset means,
The picking system, wherein the second reset means is executed when the increased weight value is less than or equal to the increased weight value set by the increased weight value setting means. The picking system according to claim 1 or 2 ,
A check means for reading the barcode of the product and determining whether the read product data matches the product data instructed by the picking instruction information;
The picking system, wherein the determination unit executes the determination when the confirmation unit executes the determination. The picking system according to claim 3 ,
A plurality of the containers and the weighing means corresponding to the containers are identifiable,
The picking instruction information includes identification information of a container into which an article is placed among the plurality of containers.
At the time of confirmation by the confirmation means, the weighing means corresponding to the container included in the picking instruction information determines whether or not the weight value is higher than when the weight value is reset by the first reset means. The second reset means resets the weight value of the weighing means corresponding to the container included in the picking instruction information.

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