Digital Picking System

Abstract

To provide means for rapidly picking an article without any mistake.SOLUTION: At a control part for generating a pop-out function for which attention is paid to a cognitively psychological phenomenon by which objects are recognized inevitably, that is, in a state where no control can be given by will of human being, provided is a display 20 for displaying information about a commodity, numerical quantity or the like of a picking object on a side of a placement shelf 10, under a situation where a plurality of recognition objects are present, when one of them has a cognitive property that is different from others, as an innate cognitive function of human being. An article storage container 52 is made to be movable on an article conveyance conveyor 50 arranged along a frame of the placement shelf 10. The article corresponding to the display 20 that is turned on is input to the article storage container 52 via picking. When the picking is completed, a completion confirmation operation of article-picking is carried out by reset means 24 of the display 20. The display uses a display function having a characteristic by which the display generates pop-out to a picker.SELECTED DRAWING: Figure 1A

Description

[Technical Field]

[0001] The present application relates to a digital picking system that retrieves items stored in a warehouse and collects them for delivery destinations, and in particular to a digital picking system for picking, i.e., retrieving requested items from shelves that store items by type. [Background technology]

[0002] In conventional picking systems, an item transport conveyor is installed along the front frame of multiple sorting shelves, and a large number of item storage containers arranged according to their destinations are transported on the item transport conveyor.

[0003] In the past, picking systems, even quite old, performed picking based on paper sheets with the items to be picked written on them, which were placed in front of conveying boxes or picking shelves. In this case, the item storage container would contain, for example, a memo sheet on which the picking items, such as the type and quantity of items to be stored in the empty container just before it was transported by the item transport conveyor, were written. The idea was that the worker would read the picking instructions written on the memo sheet, pick the items stored within the opening inside the frame of the storage shelf according to the instructions, and place the items into the item storage container.

[0004] Another method is a sowing-type system, in which instead of a conveyor for transporting goods, a cart carrying multiple baskets arranged for each destination is moved along a framework of multiple sorting shelves to collect goods. In this case, each basket contains a notepad on which the type and quantity of goods to be picked are written, and a worker reads the information on this notepad regarding the type / quantity of goods to be picked, picks out the goods stored in the openings of the framework of the shelves according to the information, and places the goods in each basket.

[0005] For example, in the technical concept described in Patent Document 1, in a picking zone, items on an item rack are manually picked into buckets, and then transported mixed in the buckets to a sorting station in an automated warehouse.

[0006] As a means for increasing the reliability and speed of picking, Patent Document 2 discloses a method in a picking system in which a display is used to instruct a picker (picker) on the items to be picked and the quantity. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] International Publication No. 2012 / 165070 [Patent Document 2] Patent Publication No. 2020-70173 [Non-patent literature]

[0008] [Non-Patent Document 1] "Fundamental processes of visual information processing," https: / / repository.dl.itc.u-tokyo.ac.jp / ?action=repository_action_common_download Summary of the Invention [Problem to be solved by the invention]

[0009] Traditionally, picking was performed based on paper-based instructions on items to be picked, placed on conveyors or shelves (stage 1). Because the instructions contained multiple items to be picked, pickers were prone to inserting the wrong items, and the need to physically handle the instructions meant that the process was slow. Meanwhile, a method of using a picking indicator to provide instructions to pickers has also been disclosed. The most important aspect of picking is to accurately and quickly insert the items into the collection container. While picking instructions using a picking indicator have come close to achieving this goal, further improvement is needed. This is because, due to the physical limitations of being human, humans can easily make mistakes in tasks that they would normally be able to perform without issue, due to factors such as accumulated fatigue, repetitive monotonous tasks, and poor health.

[0010] Next, in the second stage, the technological idea of ​​installing displays and switches on the picking shelves (early digital picking systems) emerged. This involved methods of picking items by installing numbers or push buttons on the surface of the shelves at the product opening of the picking shelves, or by displaying information such as the product and quantity to be picked on a display next to the picking shelves. This method allowed the item to be picked with the minimum necessary eye movement, reducing picking errors and easing the burden on the worker to a certain extent.

[0011] Next, in the third step, a method was devised to minimize the eye movement required when placing the items to be picked into the transport box on the conveyor line (for example, a tracking guide lamp system). That is, in a digital picking system, a band of lamps is installed at close intervals near the opening of the input box on the conveyor line, and as the input box containing the item to be picked is conveyed along the conveyor line, the lamps near the opening of the box light up for the width of the box in accordance with its movement, and these lights are switched on and off in sequence as the box moves.

[0012] Next, in the fourth stage, a projector system was developed to display only the picking shelf's picking target area and the boxes on the conveyor line that were to be placed. This further reduced the need for eye movement during picking and placing, reducing errors and easing the burden on workers. In the second and third stages, digital picking systems required the installation of display systems, such as lamps, numeric displays, and push buttons, across the entire width of the shelves. Furthermore, the guide lamps used in the third stage required installation in a strip spanning tens of meters across the combined width of all the shelves. This meant that these electrical display systems were deployed across the entire shelf and conveyor line, creating anxiety and anxiety for workers, constantly wondering which display was being picked. Therefore, the fourth stage involved the technological concept of using projection mapping to display information as needed on the surface of the shelf frame or the strip of the conveyor line, instead of these mechanical or electrical displays. This eliminated the need for workers to constantly look at electrical and mechanical displays, reducing unnecessary eye movement and further easing their workload. This also eliminated the need for the large-scale electrical and mechanical systems required in the second and third stages, significantly reducing costs and the effort required for installation.

[0013] Next, in the fifth phase, the system from the fourth phase was transformed into a system that displays information on the worker's head using a head-mounted display (HMD), further reducing the worker's eye movement and easing the work burden. In other words, the fourth phase adopted a projector-type picking system, eliminating the need to worry about unnecessary electrical and mechanical displays. However, workers still needed to be aware of the width and height of their work area. This required eye movement, but by switching to an HMD system, the worker's line of sight was displayed only in the narrow space of the HMD lenses deployed in front of the worker's eyes, truly minimizing eye movement. Furthermore, the deep sense of immersion unique to HMDs improved concentration and reduced errors. The technological concept behind the fifth phase aims to further improve work efficiency through these efforts.

[0014] However, in all of these cases, since the work is ultimately performed by a human picker, picking errors cannot be prevented from occurring due to long periods of similar work, fatigue, physical condition, etc.

[0015] The present application is intended to solve these problems in the prior art, and its purpose is to provide a digital picking system that systematically ensures that items are picked correctly and quickly. [Means for solving the problem]

[0016] To further improve the system, the inventors focused on pop-out, a phenomenon known in cognitive psychology. Pop-out is an innate human cognitive function. When multiple cognitive objects are present, one of them possesses cognitive characteristics distinct from the others, leading to the inevitable recognition of the object, i.e., beyond the control of human will. Research on pop-out has been particularly focused on visual search. In its simplest form, consider a situation in which a display screen displays multiple 45-degree right-angled line segments, among which a single 45-degree left-angled line segment is hidden. In this case, the 45-degree left-angled line segment is immediately recognized without any conscious search effort. In other words, it is possible to discover the foreign element without the search effort required in the so-called "Where's Wally?" game. This phenomenon is called pop-out. The present invention applies the uniquely human physical or ergonomic principles of pop-out, which are related to human cognition. In other words, the inventors have come up with the idea of ​​solving the problem of accurately and quickly placing the above-mentioned picking targets into the collection container by technically utilizing cognitive engineering related to this inevitable cognitive behavior of humans.

[0017] In order to solve the above problems, a digital picking system according to a first aspect of the present application is configured to include a sorting shelf having multiple frame compartments formed by multiple stacked shelves on which items to be picked are placed, an item transport conveyor installed along the sorting shelf for transporting items or item containers, shelf-side displays installed on the front end surfaces of each item placement position partitioned by each area of ​​the sorting shelf and that turn on, blink, or turn off information related to the number and type of items to be picked, guide lamps arranged along the item transport conveyor, and a control unit that controls the shelf-side displays and / or the guide lamps to display a pop-out function. Here, "pop-out function display" refers to a conventional display to which a pop-up function has been added or which has been edited or processed.

[0018] As a second aspect of the present application, in the first aspect, the control unit may be configured to control the shelf-side display and / or the guide lamp to light up or flash in synchronization with the timing when an item or item storage container moves near the shelf-side display, so as to cause a visual pop-out.

[0019] As a third aspect of the present application, in the first or second aspect, an audio generating unit such as a speaker or earphone may be further provided, and the control unit may be configured to control the audio generating unit to produce an auditory pop-out.

[0020] As a fourth aspect of the present application, in the third aspect, the sound generating unit is a picking instruction sound generating unit with excellent directionality corresponding to the location of the shelf on which the item to be picked is stored, and the control unit may control the picking instruction sound generating unit to operate in synchronization with the timing at which an item or an item storage container moves near the picking instruction sound generating unit so that an auditory pop-out occurs.

[0021] As a fifth aspect of the present application, in any of the first to fourth aspects, the pop-out function display may be provided with a visual pop-out function including a picking instruction means using virtual reality and / or augmented reality, or a picking instruction means using a projector.

[0022] As described above, the above-described aspects of the present invention have been proposed, including the installation of a picking indicator near the front of a shelf on which picking targets are stored, to provide pickers with information about the items and their quantities. The present application expands on this approach by making the picking indicator significantly different in cognitive characteristics from the surrounding objects, i.e., the shelf, the items to be picked, or the storage box, thereby further unavoidably stimulating human cognitive characteristics. Alternatively, a flashing lamp may be provided. When the picker turns his or her eyes to the shelf storing the items to be picked, a pop-out occurs, making the picker unavoidably aware of the picking indicator and receiving the information displayed thereon. This allows the picker to accurately and quickly place the items into the collection container. In this case, the pop-out principle stimulates the picker's subconscious, meaning that the picker inevitably receives certain information (e.g., information about the items to be picked and their quantity; hereinafter, both information and information are collectively referred to as "picking information"), whether or not he or she is aware of it. This minimizes the room for error in human cognition because the area of ​​stimulus and information reception extends beyond recognition, making it possible to exchange picking information, for example, in an area where there is no room for recognition errors, which are the source of errors.

[0023] To clarify this point, pickers do not inherently want to make mistakes. Since picking errors directly affect their own work performance, they are expected to avoid them as much as possible. However, there are limitations to being human. For example, if a picker is in poor health, even the most accurate worker can make mistakes. Furthermore, even healthy individuals are more likely to make mistakes due to fatigue if they perform the same or similar tasks for extended periods of time. The same can be said for individuals experiencing accumulated fatigue. All of these errors result from cognitive errors inherent in being human. For example, if a picker picks "three items A" and then "four items B," and then becomes fatigued, and receives the picking instruction to "pick up two items A," the picker's visual information, "item A" and "two items," may be confused (in the picker's mind) with the information they visually perceived as "item A" and "two items," which they had previously visually recognized as picking information and immediately converted into action information that triggered the picking action. If the fatigue level is not high, such malfunctions will be corrected internally before they become apparent, but if the fatigue level is high or the person is in poor health, such internal corrections will not be made, and the above-mentioned misperception will manifest as incorrect pick-up behavior.

[0024] In this application, we aim to prevent the above-mentioned false recognition by stimulating areas outside of human conscious awareness through a situation that triggers an unavoidable recognition known as pop-out. Here, pop-out is defined as a phenomenon in which, when searching for a target stimulus that is different from a group of distracting stimuli, the target stimulus can be perceived instantaneously without searching through all the stimuli. To cause pop-out, rather than simply displaying something, the following elements are added to the display: -Information other than the information you want to highlight (called "peripheral information") is displayed in a normal, upright font, and the information you want to highlight (called "target information") is displayed in italics, for example. -Display peripheral information in poor handwriting and target information in good handwriting. -Displays surrounding information in black and target information in red. -Display surrounding information at normal points and target information at, for example, 1.5 times the normal points. In all of the above cases, the surrounding information is displayed in a lit state and the target information is displayed in a flashing state.

[0025] As an example of a pick-and-drop type picking system, consider a case where a transport conveyor is installed along the shelves where the items to be picked are placed. A collection container moves on the conveyor, and when it approaches the shelf where the items to be picked are stored, the picking display displays information such as the item to be picked and its quantity. This causes a pop-out to occur, and the picker is inevitably reminded of the item and its quantity through a mental conversion, and based on this recognition, the picker can place the item into the storage container.

[0026] To ensure that the pop-out occurs at the most appropriate time just before the picking operation, the timing of the display may be adjusted, such as by activating the picking display before the collection container arrives at the shelf storing the items to be picked. This provides a time-varying pop-out function in the sense that it increases recognition or recognition accuracy by incorporating the factor of time variation into the pop-out principle.

[0027] Furthermore, when picking is completed, a means for resetting the picking indicator may be introduced to have the picker confirm the completion of the picking, further increasing the accuracy of picking. For example, by having the picker step on a foot button as a confirmation action, the picker will be able to recognize the completion of the target task of picking in a pop-out manner.

[0028] Furthermore, multiple lamp indicators that light up as the collection containers move can be placed adjacent to the item conveyor, and the movement of the lamp indicators can notify the picker in advance of picking. The movement of the lamps also acts as a pop-out stimulus, allowing the picker to recognize that they should perform the picking task even if the picking indicator does not pop out. This can further improve picking accuracy and speed. This provides a location-variable pop-out function in the sense that it increases recognition or recognition accuracy by incorporating the factor of location variation into the pop-out principle.

[0029] Furthermore, a lamp indicator may be installed on the collection container itself, and when the collection container moves in front of the shelf on which the item to be collected is stored, the lamp indicator on the collection container may light up or flash, thereby informing the picker that the item has been picked.

[0030] The entire device including the transport conveyor, picking indicator, lamp indicators adjacent to the conveyor, and collection container lamp indicators may be computer-controlled to perform synchronous picking. This is to create synchronization / asynchronousity of the indicators, thereby realizing the pop-out function, since temporal fluctuation / displacement can enhance the pop-out function as described above.

[0031] In addition to the above, virtual reality or augmented reality may be used as a means for generating visual pop-out, or a projector may be used as another method. This method utilizes the pop-out principle depending on the display content or display format to increase recognition or recognition accuracy.

[0032] While the above describes a means using visual pop-outs, a method using auditory pop-outs is also possible. In this case, for example, a speaker (hereinafter referred to as a "picking speaker") serving as a sound generating unit with excellent directionality may be installed near, including in front of, the shelf on which the items to be picked are stored, and when a picker approaches or an item storage container on a conveyor approaches, the picking speaker outputs a sound that generates an auditory pop-out to give instructions to the picker. Note that the sound generating unit may also be, for example, an earphone (the same applies below; in this case, the picking speaker corresponds to a picking earphone).

[0033] As a picking speaker with excellent directionality, for example, but not limited to, a means using ultrasound is known, and by emitting sound waves in a narrow range of about 10 degrees, it is possible to cause pop-out only in a specific picker.

[0034] As an example of a seeding type picking system, consider a case where a cart carrying an item storage container is moved between shelves where the items are stored to store the items. In this case, the machine / system detects when the cart moves and approaches the shelf where the item to be picked is stored, and then lights up a picking indicator, causing the picker to pop out.

[0035] The difference between the picking (pick-up) type and the sowing (assortment) type can be summarized as whether the picker and storage container move together toward the shelf where the item to be picked is stored, or whether the picker and the item in question are one and do not move, and the storage container moves in between. According to this, the basic operation of activating a picking indicator as a pop-out stimulus when the relative distance between the item to be picked and the container for storing the item to be picked becomes shorter falls within the scope of the same technical concept.

[0036] Therefore, in the sowing type, as in the picking type, when the item storage container moving with the picker approaches the item to be picked, it is within the scope of the technical concept of the present invention to cause the picker to pop out using a picking indicator, picking speaker, etc. [Effects of the Invention]

[0037] According to an aspect of the present invention, by utilizing pop-out, an innate and unavoidable cognitive characteristic of humans, in an engineering manner, a digital picking system is provided that reduces errors, improves reliability, and can quickly place items into collection containers. [Brief explanation of the drawings]

[0038] [Figure 1A] 1 is a functional configuration diagram of a digital picking system according to an embodiment of the present invention. [Figure 1B] FIG. 1 is a perspective view of a storage shelf according to an embodiment of the present invention. [Figure 1C] FIG. 2 is a functional configuration diagram of a control unit that constitutes the digital picking system according to one embodiment of the present invention. [Figure 2] FIG. 1 is a front view of a storage shelf according to an embodiment of the present invention. [Figure 3] 1 is a diagram showing the main configuration of a picking indicator that is installed on a shelf according to an embodiment of the present invention and that instructs the insertion of an item. DETAILED DESCRIPTION OF THE INVENTION

[0039] A digital picking system according to an embodiment of the present invention will be described in detail below with reference to the drawings. Although not limited to the manner in which the technical concept of the present application is applied, Fig. 1A shows a schematic diagram of the functional configuration of a digital picking system 1000 according to an embodiment of the present invention, and Fig. 1B shows an example of a storage shelf according to an embodiment of the present invention.

[0040] As shown in FIG. 1A, a digital picking system 1000 according to one embodiment of the present invention includes a warehouse management system 100 that controls the entire warehouse system (not shown), a transport conveyor 50 that transports items or containers under the control of the warehouse management system 100, a picker instruction control unit 200 located below the warehouse management system 100 and controlling various display mechanisms to display picking instruction information to the picker, a shelf display device 20 that displays picking instruction information on the shelf under the control of the picker instruction control unit 200, a guide lamp 53 that displays picking instruction information on the transport conveyor 50 under the control of the picker instruction control unit 200, and a voice generation unit 300 that issues audio picking instruction information under the control of the picker instruction control unit 200. While the elements constituting this system are not limited to those shown in FIG. 1A, only those necessary to explain the distinctive features of the present invention are shown here, and known technologies are used for parts not shown or described. The voice generation unit 300 can be realized, for example, by using a speaker or earphones.

[0041] As shown in FIG. 1B, an actual sorting device is configured by providing multiple frames 1 of shelves provided in the digital picking system according to this embodiment. Within this single frame 1, shelves 10, 10, ... are stacked in multiple tiers, for example, three tiers, and five areas, each having three tiers, are designated A, B, C, D, and E. Different pickers may be responsible for each area. Picking displays (shelf display devices) 20, 20, ... that display the products and quantities of items to be picked are provided on the sides near each shelf. Furthermore, the frames 1 corresponding to each responsible area A, B, C, D, and E may be provided with a sound generation unit 300, for example, a picking speaker 30.

[0042] Meanwhile, a transport conveyor 50 is installed along the frame 1. Containers 52 are transported on the conveyor and move along the frame 1. Furthermore, a plurality of indicator lamps (guide lamps) 53 are arranged adjacent to each other. That is, the plurality of indicator lamps (guide lamps) 53 are arranged along both the transport conveyor 50 and the frame 1. The indicator lamps are turned on in accordance with the movement of the containers 52, that is, so that the indicators move approximately in synchronism with the movement of the containers 52. and( This is hereinafter also referred to as "lighting movement." The picking indicator 20 is turned on and off approximately in synchronization with the lamp indicator light 53, and is controlled so that the picking indicator 20 also lights up in accordance with the lighting movement of the lamp indicator light 53.

[0043] 1C is a block diagram showing a detailed functional configuration of the picker instruction control unit 200. As shown in the figure, the picker instruction control unit 200 is configured to include a timing control unit 20010 that controls the overall timing and in particular performs synchronization control with the transport timing of the transport conveyor, a pop-out control unit 20020 that performs control to activate a pop-out function (described later), a shelf display control unit 20030 that controls display on the shelf display device 20 under the control of the timing control unit 20010 and the pop-out control unit 20020, a guide lamp display control unit 20040 that controls display on the guide lamps 53 under the control of the timing control unit 20010 and the pop-out control unit 20020, and a voice generation control unit 20050 that controls sound generation by the voice generation unit 300 under the control of the timing control unit 20010 and the pop-out control unit 20020.

[0044] 2 shows the picking indicators 20, 20,... installed in front of each of the shelves 10, 10,.... The picking indicators 20, 20,... are installed independently and correspond to the respective article placement locations on the shelves, so that the relationship between the insertion instruction and the inserted article can be determined without hesitation.

[0045] FIG. 3 is a front view of an example of a picking indicator 20, which is installed corresponding to the item placement location on the shelf. The picking indicator 20 has the important function of prompting the picker to pop out the picking operation. For this purpose, a picking indicator lamp 21 is provided as an example. The indicator lamp lights up or flashes in a pop-out manner when the item needs to be picked. "Pop-out" refers to displaying an item in a manner that demonstrates a pop-out function based on human cognitive engineering. Specifically, for example, as a form of visual and / or auditory stimulation, at least one of the following may be presented at an abrupt time in a manner different from the surroundings, such as a color, a flashing time lag, text, or graphics, in a form different from the previous display. In addition, for example, an audio alert from the audio generation unit 300 may be played at a timing that approximately coincides with the display. Such visual or visual and auditory features are highly distinctive for the shelf assigned to each picker, and can easily trigger a pop-out.

[0046] In addition to the above, the article insertion instruction lamp 22 is lit or flashes. By shifting the timing of this lighting or flashing from the lighting or flashing of the picking instruction lamp 21 or by changing the display color, it is possible to more reliably cause the viewer to recognize the pop-out.

[0047] In addition to the above, sound waves may be generated from, for example, the picking speaker 30 serving as the highly directional sound generating unit 300, to cause an auditory pop-out to the picker.

[0048] The number of items to be placed is displayed on the quantity display 23. The picker places the number displayed here into the collection container. Since the pop-out function is activated and the picker (supervisor) reads and interprets the quantity information, the possibility of picking the wrong number of items can be reduced.

[0049] When the picker has finished putting the items in, he / she presses the putting completion button 24 to notify the system that the putting has been completed. This resets all displays on the picking display 20 and the system waits for the next putting instruction to be displayed.

[0050] In this way, only the picking indicator 20 corresponding to the article to be inserted lights up or flashes, so that the picker can be sure that the pop-out will occur.

[0051] Note that various modifications may be made to the present invention within the spirit of the present invention, i.e., within the scope of the present invention, which provides picking instructions using visual and / or auditory pop-outs in an engineering manner. For example, methods using virtual reality or augmented reality as a picking display, or methods using a projector, are also within the scope of the technical concept of the present invention. Also within the scope of the technical concept of the present invention are methods using auditory pop-outs instead of visual pop-outs, or methods using both visual and auditory pop-outs, tactile pop-outs (e.g., providing a physical stimulus to the picker), olfactory pop-outs (e.g., emitting a special material that stimulates the sense of smell when the target object arrives), and other pop-outs (e.g., providing a stimulating perception by changing the physical location of the object to be picked). [Industrial Applicability]

[0052] As described above, according to each embodiment of the present application, the pop-out function can be utilized to accurately perform pickup or assortment, and therefore each aspect of the present invention has great applicability in various industries, including the logistics industry. [Explanation of symbols]

[0053] 1 slot 10 Storage shelf 20 Picking indicator 21 Picking indicator lamp 22 Instructions for loading goods 23 Quantity indicator 24. Loading completion button 30 Picking Speaker 50 Goods transport conveyor 52 Goods storage container 53 Lamp indicator 100 Warehouse management system control section 200 Picker instruction control unit 300 Sound generation unit 20010 Timing control unit 20020 Pop-out control unit 20030 Shelf display control unit 20040 Guide lamp display control unit 20050 Speaker control unit

Claims

1. a sorting shelf having a plurality of frames formed by stacking a plurality of shelves on which items to be picked are placed; an article transport conveyor that is installed along the sorting shelves and transports articles or article storage containers; a shelf-side indicator provided in front of each of the article placement positions partitioned by each area of ​​the placement shelf, and which lights up, flashes, or turns off information relating to the number and type of articles to be picked by the picker; guide lamps arranged along the article transport conveyor; a control unit that controls the shelf-side display and / or the guide lamp to perform a pop-out function display that stimulates even the unconscious area of ​​the picker by performing a display including at least one of a mode in which information other than the target information is displayed in a normal, upright font and the target information is displayed in italics, and a mode in which information other than the target information is displayed in a poorly written font and the target information is displayed in a well-written font; A digital picking system comprising:

2. The control unit The digital picking system described in claim 1, characterized in that the shelf-side display and / or the guide lamp are controlled to light up or flash so as to cause a visual pop-out in synchronization with the timing at which an item or item-containing container moves near the shelf-side display.

3. Further comprising a sound generating unit, 3. The digital picking system according to claim 1, wherein the control unit controls the sound generating unit to generate an auditory pop-out.

4. the voice generating unit is a picking instruction voice generating unit having excellent directionality corresponding to the location on the shelf where the item to be picked is stored, The digital picking system of claim 3, wherein the control unit controls the picking instruction sound generating unit to operate so that an auditory pop-out occurs in synchronization with the timing at which an item or an item storage container moves near the picking instruction sound generating unit.

5. The digital picking system according to any one of claims 1 to 4, characterized in that the pop-out function display is provided with a visual pop-out function including a picking instruction means using virtual reality and / or augmented reality, or a picking instruction means using a projector.

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