Label printing device

Abstract

To make reliable exchange work be quickly completed.SOLUTION: A label issuing device that issues a label to be attached to a commodity comprises identification information acquisition means, information acquisition instruction means, determination means, and label exchange auxiliary means. The identification information acquisition means that is a first antenna is configured to acquire identification information of a tag applied to a label roll located at a loading position. The information acquisition instruction means gives instructions so as to start the first antenna under a predetermined condition. The determination means determines whether or not identification information of the label roll that is presently set and the identification information of the tag applied to the label roll that has been exchanged or is being exchanged are identical to each other. The label exchange auxiliary means is operated in such a manner that exchange work of the label roll is completed when both of the identification information are identical to each other by the determination means.SELECTED DRAWING: Figure 10

Description

Technical Field

[0001] The present invention relates to a label issuing device.

Background Art

[0002] A label issuing device for attaching labels to products on a conveyor is known (see, for example, Patent Document 1). The label issuing device described in Patent Document 1 includes a plurality of label applicators (so-called "labelers", which may also be referred to by this name hereinafter) for attaching labels to products on a conveyor, and the plurality of label applicators issue labels alternately.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, with the label issuing device described in Patent Document 1, if the labels run out during operation, the entire system must be stopped before the labels can be replaced, which significantly reduces work efficiency. Therefore, one possible approach is to install multiple labelers and apply labels alternately, adjusting the end timing of the multiple label rolls appropriately so that the label replacement work is performed when one labeler runs out, while the other labeler continues the application work independently in a nonstop manner. However, even with this approach, there is still room for improvement. It is common practice to provide a stock area (label storage location) near the label issuing device to store spare label rolls so that labels can be replaced quickly when they run out, but if the stock runs out or the wrong type of label roll is stored there, the significance of the nonstop method that has been achieved is diminished. Furthermore, this problem of stock running out is not limited to the nonstop method with twin labelers, but is also a problem for a normal label issuing device with a single labeler. In other words, even if the work is stopped for label replacement, it is better if it is done quickly. Regardless of the method used, it is essential that the replacement process be completed quickly and reliably. The situation of loading the wrong label roll must be avoided at all costs, and if such a situation occurs, a swift response is necessary. [Means for solving the problem]

[0005] The label issuing device according to the present invention comprises at least the following components. A label issuing device for issuing labels to be attached to products and contained in a cassette, comprising a label attachment unit, an identification information acquisition means, a determination means, and a label replacement assist means, wherein the identification information acquisition means is a first antenna configured to acquire the identification information of a tag attached to a label roll in the loading position, the determination means determines whether the identification information of the currently set label roll matches the identification information of a tag attached to a label roll contained in a cassette that has been replaced or is about to be replaced, and the label replacement assist means isThis mechanism moves the transport section of the label issuing device away from the application position when the label roll is replaced. The method is characterized in that, when the determination means determines that the labels do not match, the print head of the label application unit is not returned to the printing position. [Brief explanation of the drawing]

[0006] [Figure 1] This is an overall diagram showing an example of a label issuing device according to the first embodiment of the present invention, where (a) is a top view, (b) is a front view, and (c) is a right side view. [Figure 2] This figure shows an example of the electrical functional block of a label printing device. [Figure 3] This diagram illustrates an example of the placement of an antenna for detecting RFID tags. [Figure 4] Figure 4 shows the cassette and the labeler unit, with (a) showing only the cassette, (b) showing only the labeler unit, and (c) showing the labeler unit with the cassette loaded, including the antenna configuration. (d) is an example showing a different antenna configuration. [Figure 5] This is a perspective view showing how the antenna is positioned on the labeler unit. [Figure 6] This is a conceptual diagram illustrating an example of the operation of a label printing device in its normal mode (alternating mode). [Figure 7] This is a conceptual diagram illustrating an example of the operation of a label issuing device according to the first embodiment of the present invention in one-sided mode (single-sided labeling mode). [Figure 8] This is a flowchart showing an example of the operation of a label issuing device according to the first embodiment of the present invention. [Figure 9] These are diagrams illustrating an example of the operation of a label issuing device. (a) is a diagram showing an example of a test label. (b) is a diagram showing an example of a display screen prompting the user to read the test label. (c) is a diagram showing an example of a display screen confirming that the test label has been read. [Figure 10] This flowchart shows an example of the steps taken when preparing to change a label. [Figure 11]These are examples of screen displays indicating whether a label replacement was successful or not. (a) shows an example of the display when the replacement was performed correctly, and (b) shows an example of the display when the replacement was performed incorrectly. [Figure 12] This flowchart shows an example of how a label issuing device operates during near-end detection. [Figure 13] These are examples of detailed displays that show the type of label that has been set. (a) shows that the correct label has been placed, (b) shows that an incorrect label has been placed, and (c) shows that the label has ended and an incorrect label has been placed. [Modes for carrying out the invention]

[0007] As mentioned above, the problems that this invention aims to solve apply to both nonstop label issuing devices with twin labelers (usually two sets of labelers, one for top-side and one for bottom-side labeling) and conventional label issuing devices with single labelers (usually one set of labelers, one for top-side and one for bottom-side labeling). We will first explain the case where the invention is implemented using the nonstop method. [First Embodiment (Example of Application in Nonstop Method)] The label issuing device according to the first embodiment of the present invention has a plurality of labelers that affix labels to products on a conveyor belt. This label issuing device includes a control unit that performs control to switch the operation of generating print data and affixing labels for the plurality of labelers, and an instruction means that receives a command output from the control unit and instructs the timing of generating print data to be printed on the labels and executing the operation of affixing labels at a first predetermined interval. The control unit outputs a command to the instruction means to change the timing of executing the label affixing operation to a second predetermined interval that is shorter than the first predetermined interval, in response to the switch to the operation of affixing labels on one of the plurality of labelers. Furthermore, the label issuing device according to the first embodiment of the present invention acquires identification information of tags attached to label rolls in storage under predetermined conditions, determines whether the currently set identification information of label rolls matches the identification information of tags attached to label rolls in storage, and notifies the operator of the result.

[0008] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. The first embodiment of the present invention includes, but is not limited to, the illustrated contents. In the following descriptions of each figure, parts common to parts already described will be denoted by the same reference numerals, and some redundant explanations will be omitted.

[0009] Figure 1 is an overall view of the label issuing device 100 according to the first embodiment of the present invention, where (a) is a top view, (b) is a front view, and (c) is a right side view. As shown in these figures, the label issuing device 100 according to the first embodiment of the present invention issues labels and affixes them to goods (articles) that are transported by a conveyor. In detail, the label issuing device 100 includes a conveyor belt 20 (also called the conveyor 20) provided on a transport table 201, a control device 10, and a plurality of label applying machines 80, etc.

[0010] The conveyor 20 is a conveying mechanism for conveying articles (goods). On the conveyor table 201, the conveyor 20 and the label applicator 80 are arranged in order from the upstream side to the downstream side in the conveying direction. In the example shown in FIG. 1, the label issuing device 100 has the first label applicator 81, the second label applicator 82, the third label applicator 83, and the fourth label applicator 84. Each of the label applicators 81, 82, 83, 84 has a label issuing part, a label applying part, etc. The label applying part attaches the label issued by the label issuing part to the commodity (article).

[0011] The label applicator 80 has the first label applicator 81 and the second label applicator 82 as upper labelers, and the third label applicator 83 and the fourth label applicator 84 as lower labelers. The first label applicator 81 and the second label applicator 82 are arranged above the conveyor in order from the upstream side to the downstream side in the conveying direction. The third label applicator 83 and the fourth label applicator 84 are arranged below the conveyor in order from the upstream side to the downstream side in the conveying direction.

[0012] In the example shown in FIG. 1, the conveyor 20 has a plurality of conveyors 21, 22, 23. The conveyors 21, 22, 23 are arranged horizontally in order from the upstream side to the downstream side in the conveying direction. Specifically, the conveyor 21 has a pair of rollers R21, R22 arranged at a predetermined distance apart in the conveying direction of the conveying path, and an endless belt B1 stretched between the pair of rollers R21, R22. The conveyor 22 has a pair of rollers R23, R24 arranged at a predetermined distance apart, and an endless belt B2 stretched between the pair of rollers R23, R24. The conveyor 23 has a pair of rollers R25, R26 arranged at a predetermined distance apart, and an endless belt B3 stretched between the pair of rollers R25, R26.

[0013] Also, the conveyors 21, 22, 23 each have a drive motor (not shown), and the rollers and endless belts of each conveyor are configured to be rotatable.

[0014] Between the conveyor 21 and the conveyor 22, a third label affixing section 832 of a third label affixing machine 83 is arranged, and the third label affixing section 832 is configured to be able to affix a label to the bottom surface (lower surface) of a product (article). Between the conveyor 22 and the conveyor 23, a fourth label affixing section 842 of a fourth label affixing machine 84 is arranged, and the fourth label affixing section 842 is configured to be able to affix a label to the bottom surface (lower surface) of a product (article).

[0015] The control device 10 (console) has a display input section 14 (display operation section) and the like, and is provided in the vicinity of the conveyor 20. In addition, a warning display section 145 (sign pole) is arranged above the conveyor 20. A plurality of warning lamps (in the example shown in FIG. 1, four warning lamps 1451, 1452, 1453, 1454) are arranged vertically in the warning display section 145, and are configured to light up or blink according to the remaining label amounts of the label affixing machines 81, 82, 83, 84 respectively. The warning display section 145 is controlled by the control device 10 and each label affixing machine 81, 82, 83, 84. When the plurality of warning lamps light up or blink, not only information regarding the remaining label amount but also stock error information of replacement labels described later is obtained, and the lighting colors of the warning lamps are made different to perform lighting and blinking. By this, the on-site worker can grasp not only the state of the currently operating labels but also the state of the stock location.

[0016] FIG. 2 is a diagram showing an example of an electrical functional block of a label issuing device 100 according to the first embodiment of the present invention. The label issuing device 100 has a control device 10, a conveyor 20, a plurality of label affixing machines 80 (also referred to as labelers), a product detection sensor 17 (article detection section) for detecting the position of a product (object to be conveyed) conveyed by the conveyor 20, and the like. In the present embodiment, the label issuing device 100 has a first label affixing machine 81, a second label affixing machine 82, a third label affixing machine 83, and a fourth label affixing machine 84.

[0017] In detail, the first labeling machine 81 includes a first label issuing unit 811, a first labeling unit 812, a first remaining quantity detection unit 813, a CPU 814 as a control unit for the first labeler, a storage unit 815, a communication unit 816, a display unit (not shown), an operation unit (not shown), etc. An RFID tag detection antenna (referred to as the "first antenna" in this invention) for acquiring identification information of tags attached to the label roll is connected to the communication unit 816 by wire or wireless. The installation position of the first antenna will be described later. The second labeling machine 82 includes a second label issuing unit 821, a second labeling unit 822, a second remaining quantity detection unit 823, a CPU 824 as a control unit for the second labeler, a storage unit 825, a communication unit 826, a display unit (not shown), an operation unit (not shown), and the like. An RFID tag detection antenna (first antenna) for acquiring identification information of tags attached to the label roll is connected to the communication unit 826 by wire or wireless. The third labeling machine 83 includes a third label issuing unit 831, a third labeling unit 832, a third remaining quantity detection unit 833, a CPU 834 as a control unit for the third labeler, a storage unit 835, a communication unit 836, a display unit (not shown), an operation unit (not shown), and the like. An RFID tag detection antenna (first antenna) for acquiring identification information of tags attached to the label roll is connected to the communication unit 836 by wire or wireless. The fourth labeling machine 84 includes a fourth label issuing unit 841, a fourth labeling unit 842, a fourth remaining quantity detection unit 843, a CPU 844 as a control unit for the fourth labeler, a storage unit 845, a communication unit 846, a display unit (not shown), an operation unit (not shown), and the like. An RFID tag detection antenna (first antenna) for acquiring identification information of tags attached to the label roll is connected to the communication unit 846 by wire or wireless.

[0018] Each labeling machine 81, 82, 83, and 84 has a label issuing unit 811, 821, 831, and 841, respectively, which is detachably mounted on the labeler body. The cassette contains a label roll storage section, a label roll stored in the label roll storage section, and a backing paper storage section for storing the collected backing paper in a roll shape. A label roll consists of labels with an adhesive surface on one side that are temporarily attached to a long sheet of backing paper, which is then wound into a roll. Alternatively, a label sheet with backing paper may be used, where label paper of a predetermined size is temporarily attached to the backing paper and wound into a roll. In this case, the label paper may have pre-cut lines at predetermined sizes, or labels of a predetermined size may be continuously attached with predetermined intervals (margins) between them. In other words, each labeler is configured to allow for easy replacement with a cassette containing a new label roll when the remaining label quantity falls below a predetermined amount, resulting in a very short time during which label application is stopped (replacement time).

[0019] The label rolls housed in the cassette are equipped with RFID tags that store identification information such as the label type, length, and target product. When the wrong cassette is inserted, this can be detected via a first antenna located inside the labeler unit, and the operator can be notified. In addition to the label type information, the information stored may also include the content already printed on the label. For example, this could refer to cases where the date or other information is added to a pre-printed label, such as a product name label. If the wrong product name label is applied to many products and sent out, it would be a critical situation. By storing the content, such a situation can be prevented. Furthermore, in the case of an antenna and tags that can write to RFID tags, the remaining amount of labels can be stored by writing the amount of labels used to the tag. This allows for label replacement when the product changes midway through the process, or by obtaining the remaining amount information from the RFID tag when discontinuing work, which can serve as a guide for replacement. Furthermore, the casing of the labeler unit is equipped with an electromagnetic cover shield to prevent interference between the first antennas of the first labeling machine 81, the second labeling machine 82, the third labeling machine 83, and the fourth labeling machine 84 when determining whether their respective cassettes are appropriate. The RFID tags can be positioned either inside the core along the longitudinal direction of the core of the label roll R, or embedded in the core. Furthermore, the RFID tag is also used to obtain stock error information for replacement labels, as will be described later. That is, assuming that cassettes are placed for replacement in a stock location (label storage location) located near the label issuing device 100, the RFID tag is used to determine whether or not a cassette is placed there, and whether or not the cassette contains the correct type of label roll. This information is acquired via a second antenna whose search range is the stock location (label storage location).

[0020] Each label issuing unit 811, 821, 831, 841 of the labeling machines 81, 82, 83, and 84 has, for example, a print head, a platen roller, etc., and prints on labels temporarily attached to a long backing sheet based on print data such as product information from the control device 10, and issues labels by peeling the labels off the backing sheet. In this embodiment, the label issuing unit issued labels by peeling them off the backing paper. However, this embodiment is not limited to this one, and labels (backing paper-less labels) may also be issued by printing on a long sheet of label paper and cutting the label paper to a predetermined length.

[0021] The label application units 812, 822, 832, and 842 of each label application machine 81, 82, 83, and 84 apply labels issued by the label issuing units 811, 821, 831, and 841 to goods (articles) being transported by the conveyor. In detail, the first label application section 812 and the second label application section 822 apply the top label to the predetermined position on the top surface of the product by using air pressure, which is achieved by spraying high-pressure air downwards. The third label application section 832 and the fourth label application section 842 have a label inclined conveyor, and the bottom labels (bottom labels) issued by the label issuing sections 831 and 841 are transported by the label inclined conveyor and applied to the bottom surface (bottom surface) of the goods (articles) being transported by the conveyor 20.

[0022] Each remaining amount detection unit 813, 823, 833, and 843 detects the remaining amount of labels stored in each labeler and transmits the detection result to the control device 10. For example, the first remaining amount detection unit 813 is composed of a reflective sensor consisting of a light-emitting unit and a light-receiving unit (optical sensor), and each is positioned such that the label roll R is located between the light-emitting unit and the light-receiving unit. The first remaining amount detection unit 813 is configured such that if the radial thickness of the label roll exceeds a specified value, light from the light-emitting unit does not reach the light-receiving unit (optical sensor), and if the radial thickness of the label roll is less than or equal to the specified value, the light-receiving unit receives light from the light-emitting unit. In other words, the first remaining amount detection unit 813 can detect that the remaining amount of labels has reached a predetermined amount based on whether or not light from the light-emitting unit is detected by the light-receiving unit, and outputs the detection result to the control device 10. As another detection example, the remaining amount of labels may be determined based on the length of the label roll and the amount dispensed, which are stored in advance. The second remaining amount detection unit 823, the third remaining amount detection unit 833, and the fourth remaining amount detection unit 843 have substantially the same configuration as the first remaining amount detection unit 813, so their explanation will be omitted. Furthermore, each remaining quantity detection unit 813, 823, 833, and 843 transmits the detection result to the control device 10 when it detects that the remaining quantity of labels in each labeler is zero (end detection). Since zero remaining quantity detection simply detects that the end of the roll has been reached, an explanation is omitted.

[0023] Each labeler's CPU 814, 824, 834, and 844 comprehensively control each component of the labeler. Specifically, in each labeler, they comprehensively control monitoring and control, such as transmitting detection results for various abnormal conditions to the control device 10 when near-end detection occurs when the remaining label quantity falls below a predetermined amount, end detection occurs when the remaining label quantity is zero, or when malfunctions in the label feeding operation or printing mechanism are detected. They also comprehensively control recovery processes, such as issuing pre-printed labels and test labels (described later), independently of the control device 10. Each labeler's memory unit 815, 825, 835, and 845 are composed of memory devices such as RAM and ROM, and store control programs, received product information, print data, and the like. The communication units 816, 826, 836, and 846 of each labeler are connected to the control device 10 (console) via a communication path (wired or wireless). The communication units 816, 826, 836, and 846 also communicate with an RFID tag detection antenna for acquiring identification information of tags attached to label rolls placed in a storage area. Each labeler's display unit (not shown) may include, for example, an alarm lamp that lights up or flashes when the remaining label quantity falls below a predetermined amount or becomes zero, or a display device that shows the label application status. The operating section (not shown) of each labeler includes various buttons and switches, such as an operating lever used when inserting or removing a cassette, and a button used when issuing a test label. The test label may be issued automatically when the cassette is changed.

[0024] The product detection sensor 17 is positioned at a predetermined location on the conveyor table 201 and detects the position of the product (article) being transported by the conveyor. The product detection sensor 17 is, for example, a retrograde reflective sensor positioned on either the left or right side in the width direction of the conveyor, or a light-emitting unit and a light-receiving unit (optical sensor) positioned on either the left or right side in the width direction of the conveyor. In this embodiment, the product detection sensor 17 is positioned near the upstream end of the conveyor 21 in the transport direction. While multiple sensors may be provided at predetermined locations as needed for backup or to improve accuracy, even a single sensor is sufficient for overall control and is cost-effective. When goods are transported by conveyors 21, 22, and 23, the control device 10 determines the position of the goods based on detection signals from the goods detection sensors 17 and the transport speed of each conveyor, and performs processing such as labeling the goods using labeling machines 81, 82, 83, and 84.

[0025] The control device 10 comprehensively controls each component of the label issuing device 100. In the example shown in Figure 2, the control device 10 includes a CPU 11, a storage unit 12, a communication unit 13, a display input unit 14, and a test label detection unit 143, etc.

[0026] The memory unit 12 stores control programs, various control parameters, product information, print data, etc. The memory unit 12 can be, for example, RAM, ROM, HDD, SSD, or a portable storage device that can be attached to the main unit of the device.

[0027] The communication unit 13 is connected to labeling machines 81, 82, 83, and 84, as well as computers such as higher-level management devices, via a wired or wireless communication path under the control of the CPU 11.

[0028] The display input unit 14 includes a display unit 141, an operation input unit 142, etc. The display unit 141 is a display device such as a liquid crystal display device, and the operation input unit 142 is an operation button, operation key, switch, touch panel, etc. The display input unit 14 may also be a touch panel display device.

[0029] The test label detection unit 143 is a device that detects test labels, such as a code reader, and reads code information such as barcodes and 2D codes printed on the test labels, and outputs it to the CPU 11, memory unit 12, etc.

[0030] The CPU 11 comprehensively controls each component of the control device 10. In detail, the CPU 11 includes a control unit 102, an instruction unit 104 (instruction means), an acquisition unit 105 (acquisition unit), a determination unit 106 (determination means), etc. For example, the CPU 11 realizes the functions according to the present invention in the control device as a computer by executing a control program. The control device 10 may realize the above functions by a dedicated circuit.

[0031] The control unit 102 executes control to switch the operation of generating data and applying labels for multiple labeling machines 80 (81, 82, 83, 84, etc.). Furthermore, in response to switching to the operation of applying labels with one of the multiple labelers, the control unit 102 outputs a command to the instruction unit 104 (instruction means) to change the timing of the instruction for executing the label application operation so that it is output at a second predetermined interval that is shorter than the first predetermined interval. In addition, the instruction unit 104 (instruction means) that instructs the timing of executing the label application operation can appropriately change the timing at which the instruction is output according to the processing time required, such as when the amount of print data for the label to be issued is large or when the label length is long. Furthermore, the control unit 102 acquires stock information for replacement labels, performs judgment control, and provides notification control based on the judgment result.

[0032] Under normal circumstances, the instruction unit 104 (instruction means) detects a sensor (or receives a trigger to initiate some action) and outputs instructions for label application to be sent to multiple labelers at a first predetermined interval. However, if it becomes necessary to switch one of the multiple labelers to the label application operation, the instruction for label application will be output only to the labeler that continues the label application operation. From the perspective of the labeler that continues the label application operation, it will now receive label application instructions continuously, whereas previously it received them alternately with the labeler whose label application operation will be stopped. As a result, the timing of the label application operation for the labeler that continues the operation will be changed to receive the instructions at a second predetermined interval, which is shorter than the first predetermined interval.

[0033] Furthermore, when the control unit 102 detects that the remaining amount of labels on the labeler has reached a predetermined amount, it switches to the operation of applying labels with one of the multiple labelers and outputs a command to the instruction means to change the timing of the execution of the label application operation to a second predetermined interval.

[0034] Furthermore, in response to detecting an error, the control unit 102 switches to the operation of applying labels using one of the multiple labelers, and changes the timing of the label application operation to a second predetermined interval. An error includes not only when the remaining amount of labels reaches a predetermined level, but also printing errors, the need to replace repair parts, label issuance errors, communication errors, malfunctions of the labeling device, and other situations where the labeler does not function properly.

[0035] Upon detecting a test label, the system switches to the operation of applying labels using multiple labelers and outputs a command to the instruction means to change the timing of the label application operation to a first predetermined interval.

[0036] Furthermore, the control unit 102 moves the first labeling machine 81 and the second labeling machine 82 from their respective labeling positions in response to detecting an error. Errors include not only when the remaining amount of labels reaches a predetermined amount, but also printing errors, the need to replace repair parts, label issuance errors, communication errors, malfunctions of the labeling device, and other situations where the labeler does not operate properly. Even if an operator is unable to work nearby, if they can see from a distance that the position of the labeling machine has changed, they can detect that some kind of error has occurred. This also has the advantage of allowing maintenance work to be performed immediately.

[0037] The instruction unit 104 (instruction means) receives a command output from the control unit 102 and instructs the timing at a first predetermined interval for generating print data to be printed on the label and for executing the operation of attaching the label.

[0038] The acquisition unit 105 acquires the product indication number, which represents the total quantity of products to be labeled, for example, in response to a signal from the display input unit 14. The determination unit 106 determines whether the labeling process can be completed for multiple labelers without changing the labels, based on the remaining amount of labels on the labeler and the remaining number of unlabeled products among the product indications acquired by the acquisition unit 105.

[0039] Furthermore, the determination unit calculates the number of items indicated and the remaining amount of labels in response to the change in products, and determines whether the label application process can be completed without replacing the labels. For example, when the number of orders for one product is completed on-site and the labeling process moves on to another product, additional work is required to process the other product. Therefore, the judgment unit may perform the judgment when switching to the other product. This offers the advantage of being able to change the label while the work is paused during the product switch.

[0040] The second antenna, which searches within the stock area (label storage location), can be placed virtually anywhere as long as it can reliably detect the presence or absence of labels. However, its position and signal strength must be set to avoid interference with the antenna for the labels on the adjacent line. Covering it with a transparent radio wave shield that allows for visual confirmation of the label's presence while effectively preventing interference is an effective solution. Figure 3 illustrates an example of the placement of an RFID tag detection antenna, which acts as a second antenna with a search range of the stock area (label storage location). The second antenna will be installed in an appropriate location, taking into consideration factors such as whether it is easy to read the RFID tags on the label rolls and whether it interferes with other tasks performed by the worker. As shown in Figure 3, position "A" perpendicular to the conveyor line and on the workbench, or position "B" below the conveyor, are advantageous as they allow for easy reading and do not interfere with other tasks. Alternatively, even if the horizontal position is "A", it may be fixed to the underside of the table rather than on the table itself. In any of these positions, it is advantageous to use a thin and compact antenna in terms of space saving. If there is sufficient space and it is possible to install a workbench and secure enough space at the location marked "A", it is advisable to install multiple antennas corresponding to the first labeling machine 81, second labeling machine 82, third labeling machine 83, and fourth labeling machine 84 at multiple locations separated by the cover shield, so that the stock status of each labeler can be checked. This sorting by the cover shield is particularly effective when the types of labels for top application and bottom application are different. In addition, the workbench can be installed in locations other than those shown in the diagram, for example, between the first labeling machine 81 and the second labeling machine 82. If there is only one type of label and space is limited, multiple labels can be stored by stacking them flat in the "B" position. In this case, the identification information confirmation request signals output from the first labeling machine 81, the second labeling machine 82, the third labeling machine 83, and the fourth labeling machine 84 will be aggregated into a single RFID tag detection antenna by taking a logical OR operation. In Figure 3, the offset in the front-to-back positions of the two labelers is to indicate the timing of label replacement (labeling end time). This will be explained later.

[0041] Figure 4 shows the cassette and the labeler body, where (a) shows only the cassette, (b) shows only the labeler body, and (c) shows the cassette loaded into the labeler body. (d) is another embodiment of (b) and (c) regarding the installation of the antenna AT. As shown in (a), the label roll R is held by the cassette 200. The cassette 200 is provided with a transparent cassette cover 210 on the front, allowing the label roll R to be housed in a state where it can be seen from the outside. Inside the cassette 200, two protrusions are arranged vertically in the figure and project towards the front, so that when the cassette 200 is loaded into the labeler body, the supply shaft and winding shaft of the labeler body are locked in place from the back side of the paper surface. The RFID tags are positioned along the longitudinal direction of the core of the label roll R. In order to correctly read the information, the orientation of the RFID tags and the RFID tag detection antenna (first antenna) must be facing each other. For this reason, as shown in Figures 4(b) and (c), it is desirable to position the antenna AT along the top or side of the labeler body. In this case, it is desirable to position it in a location that protrudes from the housing so as not to interfere with cassette replacement work, and to apply electromagnetic shielding to the outside of the antenna AT to prevent interference with the antennas AT of other labelers. Furthermore, when the RFID tags are embedded near the end face of the core, it is also possible to install the antenna AT inside the labeler body, as shown in Figure 4(d). Figure 5 is a perspective view of the labeler body. In previous models, there was no casing around the cassette loading area, but in this model, a plate-like member is provided here, and the antenna AT is positioned at the hatched location shown in Figures 4(b) and (c). For convenience, the antenna AT is shown in two locations, on the top and side, but in reality, it may be located in only one of these locations.

[0042] [Normal mode of the label printing device] Next, an example of the operation of the label issuing device 100 in normal mode (alternating mode) will be explained with reference to Figure 6, etc. In the label issuing device 100 shown in Figures 1 and 6, a first label applicator 81 and a second label applicator 82 are arranged above the conveyor 20's transport path, from upstream to downstream in the transport direction of the conveyor 20. A third label applicator 83 and a fourth label applicator 84 are arranged below the conveyor 20's transport path, also from upstream to downstream in the transport direction of the conveyor 20.

[0043] For example, in normal mode (alternating mode), the control device 10 transmits instructions to the first labeling machine 81 and the second labeling machine 82 to alternately apply labels to the top surface of the goods (articles) being transported one after another by the conveyor 20, and transmits instructions to the third labeling machine 83 and the fourth labeling machine 84 to alternately apply labels to the bottom surface of the goods.

[0044] In this embodiment, for example, the first labeling machine 81, the second labeling machine 82, the third labeling machine 83, and the fourth labeling machine 84 each have a maximum labeling capacity of 100 labels per minute, but when the label issuing device 100 is in alternating mode (normal mode), it is set to, for example, 50 labels per minute. In this embodiment, the number of products transported per minute by the conveyor 20 is, for example, 100. As products are transported sequentially by the conveyor, the first labeling machine 81 (50 products per minute) and the second labeling machine 82 (50 products per minute) alternately apply top labels to the top surface of the products, while the third labeling machine 83 (50 products per minute) and the fourth labeling machine 84 (50 products per minute) alternately apply bottom labels (bottom labels) to the bottom surface (bottom) of the products. In other words, the label issuing device 100 as a whole can affix labels to the top and bottom surfaces of 100 products per minute that are transported by the conveyor belt 20. In this embodiment, the label application timing of the third label application machine 83 is approximately the same as or slightly later than the label application timing of the first labeler. The label application timing of the fourth label application machine 84 is approximately the same as or slightly later than the label application timing of the second labeler.

[0045] In this embodiment, the system consists of two sets of four labelers, an upper labeler and a lower labeler. However, it is also possible to configure the system with three or four sets of labelers along the conveyor line. In the two-set labeler embodiment, the labeling rate of one labeler is increased from 50 units per minute to 100 units per minute. However, in the case of three or four sets of labelers, the labeling rate of the labelers that continue to operate in response to the idle labeler does not need to be increased to 100 units per minute. This is because the additional processing from the normal state can be distributed among the other two or three sets. Specific operations can be appropriately configured by those skilled in the art.

[0046] [Label printing device single-sided labeling mode] Next, an example of the operation of the label issuing device 100 in one-sided mode (single-sided labeling mode) will be explained with reference to Figure 7, etc. In the example shown in Figure 7, when the remaining label quantity in the first labeling machine 81 reaches zero, it is replaced with a new label roll. In detail, the first labeling machine 81 is configured so that paper feeding, cassette removal, cassette insertion, label issuance prohibition, pre-printed label issuance, normal bitmap (print data) creation, and test label issuance can all be performed solely by the first labeling machine 81, with very little processing required on the control device 10 (console) side. In other words, the first labeling machine 81 can independently change the cassette without any processing (or with very little processing) on ​​the control device 10 (console). This means that when changing the labeler's cassette, the processing load on the control device 10 is small, and commands for label printing and label application to the second labeling machine 82, the third labeling machine 83, and the fourth labeling machine 84 can be transmitted with high accuracy and without delay at a predetermined timing, preventing application defects such as misalignment and enabling labels to be applied to products in the predetermined position with high accuracy.

[0047] The control device 10 outputs a command to the second labeling machine 82 to print labels and attach them to the top surface of the product, for example, at a timing of 100 units per minute, and attaches the top surface labels to the top surface of the product. At the same time, the third labeling machine 83 (50 units per minute) and the fourth labeling machine 84 (50 units per minute) alternately attach the bottom surface labels (bottom surface labels) to the bottom surface (bottom surface) of the product. In other words, even when the first labeling machine 81 is in a state of suspended labeling due to cassette replacement or the like, the entire label issuing device 100 can affix labels to the top and bottom surfaces of 100 products per minute that are transported by the conveyor belt 20.

[0048] Furthermore, when the first labeling machine 81 is in a labeling pause state due to cassette replacement or the like, the control device 10 may put the third labeling machine 83 into a labeling pause state, and use the second labeling machine 82 (100 units per minute) and the fourth labeling machine 84 (100 units per minute) to apply labels to the top and bottom surfaces of 100 products per minute that are transported by the conveyor 20.

[0049] For example, after replacing the cassette of the first labeler, the labeler issues a test label, and after confirming the printed content and printing condition of the test label, the control device 1 switches from the single-sided mode (single-sided labeling mode) to the normal mode (alternating mode) shown in Figure 6.

[0050] [An example of how a label printing device works] Next, an example of the operation of the label issuing device 100 according to the first embodiment of the present invention will be described with reference to Figure 8, etc.

[0051] In step ST1, the CPU 11 of the control device 10 retrieves product information about the product to be labeled from the storage unit 12, or reads product information from the storage unit of a computer connected via the communication unit 13, in response to, for example, an operation of the display input unit 14 by the operator. Alternatively, the CPU 11 of the control device 10 creates product information about the product to be labeled, in response to, for example, an operation of the display input unit 14 by the operator. Product information includes, for example, the product name, price, expiration date, manufacturing date, and manufacturer's name. Furthermore, the acquisition unit 105 (acquisition means) of the control device 10 acquires the product number, which represents the total quantity of products to be labeled, based on the signal from the display input unit 14. For example, the product number is set by the operator (worker) inputting the product number, which represents the total quantity of products to be labeled, on the setting screen of the display input unit 14.

[0052] In step ST2, each labeling machine 80, specifically the first labeling machine 81, the second labeling machine 82, the third labeling machine 83, and the fourth labeling machine 84, issues test labels. The control device 10 transmits a command to each labeling machine 80 (81, 82, 83, 84) to issue a test label, and each labeling machine 80 (81, 82, 83, 84) receives the command and issues a test label. Alternatively, each labeling machine 80 (81, 82, 83, 84) may issue a test label when the operator (worker) presses the test label issuance button (not shown). Furthermore, in step ST1, a test label may be automatically issued when product information for the product to be labeled is created. The test label should preferably have the same printed content as the label that will actually be affixed to the product. The operator manages the issued test labels by attaching them to a ledger (management ledger).

[0053] Figure 9(a) shows an example of a label L issued by the labeling machine 80 (labeler 80). In the example shown in Figure 9(a), the test label has the same printed content as the label that will be affixed to the product. For example, this label will have the product name (e.g., Inari Sushi), product price (e.g., 480 yen), expiration date (e.g., September 30, 2020, 8:00 AM), code information (e.g., 123123456789), barcode (or 2D code), manufacturer name (e.g., △□○ Supermarket), and place of manufacture (e.g., △□○ Prefecture, △□○ Town). Additionally, the label may have code information printed on it, such as a barcode or 2D code, to indicate that it is a test label.

[0054] In step ST3, the control device 10 performs a display process on the display unit of the display input unit 14 prompting the reader to read the test label. For example, as shown in Figure 9(b), the setting screen of the display input unit 14 includes a label image display unit D1, a product code display input unit D2, a label placement position display unit D3 that shows the placement position of the label image, a remaining quantity display unit D4 that shows the remaining number of labels, a labeling machine number display unit D5 that shows the labeler number, a current date and time information display unit D6, and a communication status display unit D7 that shows the communication status (online / offline) of the labeler. Furthermore, in the example shown in Figure 9(b), the setting screen of the display input unit 14 has a display unit D8 (pop-up display unit) that prompts the reader to scan the test label with the message, "Please scan the barcode on the test label. The dual-label mode (alternating mode) will be executed."

[0055] In step ST3, the test label may be read by using an imaging means other than a scanner (such as a CCD image sensor or CMOS image sensor) to recognize the label as an image and recognize data other than the barcode.

[0056] In step ST4, the CPU 11 of the control device 10 determines whether or not a test label has been detected by the test label detection unit 143 (code scanner), etc. If it has not been detected, the process proceeds to step ST3; if it has been detected, the process proceeds to step ST5. As shown in Figure 9(c), a test label confirmation display unit D9 (popup display unit) that displays "Have you read the test label?", a "Yes" button BT1, a "No" button BT2, etc., may also be displayed on the setting screen of the display input unit 14. If the "Yes" button BT1 is pressed, the process may proceed to step ST5; if the "No" button BT2 is pressed, the process may proceed to step ST3.

[0057] In step ST5, the control device 10 performs the process of attaching labels to the goods (articles) being transported by the conveyor 20 in an alternating mode using multiple label-applying machines 80. In alternating mode, for example, the control device 10 outputs commands to each labeling machine 81, 82, 83, and 84 at a first predetermined interval to control the timing of label printing and labeling, so that each labeling machine 81, 82, 83, and 84 can print 50 labels per minute.

[0058] In step ST6, the control device 10 determines, for example, whether the application of the set number of products has been completed, or whether to terminate the application process based on a signal from the display input unit 14 or a signal from the stop button (not shown). If the application is completed, the label issuing device 100 terminates its application operation; otherwise, it proceeds to step ST7.

[0059] In step ST7, each labeler determines whether the remaining amount of labels is zero. The control device 10 also obtains the remaining amount of labels on the label rolls of each labeler based on signals from the first remaining amount detection unit 813, the second remaining amount detection unit 823, the third remaining amount detection unit 833, and the fourth remaining amount detection unit 843, and determines whether the remaining amount of labels on any of the labelers is zero. If the remaining amount of labels is zero, the process proceeds to steps ST8 to ST12 in order to replace the cassette of that labeler or to apply labels in one-sided mode; otherwise, the process proceeds to step ST5.

[0060] In the label issuing device 100, steps ST9 to ST12, which are processes related to the labeler (e.g., the first label applicator 81) when the remaining label quantity reaches zero (such as cassette replacement), and step ST8, which is a one-sided label applicating process for a normal labeler (e.g., the second label applicator 82), are processed in parallel.

[0061] In detail, in step ST8, the control device 10 performs control to switch from alternating mode to one-sided mode. Specifically, for example, when the cassette of the first labeling machine 81 is being changed because the remaining amount of labels is low (ST9~ST12), the control device 10 outputs a command to the second labeling machine 82 for top-surface labeling to change the timing of the label issuance and label application operations to a second predetermined interval that is shorter than the first predetermined interval. Specifically, for example, the control device 10 controls the second labeling machine 82 to apply labels from 50 labels per minute to 100 labels per minute. The second labeling machine 82 applies labels to products being transported by the conveyor 20 in one-sided mode. Labeling by the second labeling machine 82 in one-sided mode is performed, for example, until the operations related to cassette replacement (ST9~ST12) in the first labeling machine 81 are completed.

[0062] Furthermore, the third labeling machine 83 and the fourth labeling machine 84 for bottom-side labeling may continue in alternating mode even when the remaining label quantity of one of the first labeling machine 81 and the second labeling machine 82 for top-side labeling is low and a cassette change is required. Alternatively, the labeler located below the labeler with the low remaining label quantity in the second labeling machine 82 for top-side labeling (for example, the third labeling machine 83) may be put into a labeling pause state, and the fourth labeling machine 84 may be put into single-sided mode to speed up the labeling timing in synchronization with the second labeling machine 82.

[0063] The replacement preparation process and replacement process in step ST9 are executed as a series of processes subdivided into steps ST9-1 to ST9-11. This is explained using Figure 10. For example, if the remaining number of labels loaded in the first label applicator 81 becomes zero, in ST9-1, the CPU 814 of the first label applicator 81 activates a second antenna via the communication unit 816 to acquire the identification information of the RFID tag attached to the label roll that should be in storage. Next, in ST9-2, the first label applicator 81 determines whether the identification information of the currently set label roll matches the identification information of the tag attached to the label roll that should be in storage. If it is detected that the remaining number of labels loaded in the first label applicator 81 has become zero, the first label applicator 81 can be moved to a position in front of the applicator as a form of notification that the label supply has run out. If the identification information matches, it means that the appropriate label stock is in place. In ST9-3, the control unit 102 of the label issuing device 100, having received the judgment result from the first label applicator 81, lights up or flashes the warning display unit 145 located above the conveyor 20 in yellow to prompt the worker to proceed with the replacement work. If the identification information does not match, it means that there is either no label stock at all or no appropriate label stock is in place. In ST9-4, the control unit 102 of the label issuing device 100, having received the judgment result from the first label applicator 81, lights up or flashes the warning display unit 145 located above the conveyor 20 in red. A worker who sees the red light instead of the yellow light understands that not only is a replacement necessary, but a spare, appropriate label roll also needs to be brought from the back room. In previous notification methods, workers who were notified of a label end would rush to replace it, only to be shocked to find that the label roll that should have been there was missing when they arrived at the location of the label issuing device 100. According to the first embodiment of the present invention, workers can prepare the necessary label roll before proceeding with the replacement work. Here, the illumination or flashing color is differentiated into two colors depending on whether the correct label roll is placed or not. However, if there is no label roll at all or if an unsuitable label is placed, a third color may be added to differentiate the illumination or flashing into three colors (for example, yellow, red, and purple). Illuminating in three colors can increase attention when going to the back room to retrieve a spare, and is also effective when a third antenna with a search range of the vicinity of the location is installed near the entrance from the back room. That is, in step ST9-5 following step ST9-4, the control unit 102 of the label issuing device 100 activates the third antenna. When a worker returns from the back room with a replacement label, the sign pole's red light changes to purple light, or the purple light remains purple, indicating that the worker has brought the wrong replacement label at an early stage before reaching the label issuing device 100. When the sign pole's red or purple light changes to yellow light, it means the worker has brought the correct replacement label. Step ST9-7 shows this state.

[0064] When replacement stock is available (ST9-3) or when replacement stock is ready (ST9-7), the operator replaces the cassette (a cassette containing the label roll with the maximum amount of labels remaining) of a labeler with low or zero remaining labels (e.g., the first labeling machine 81). For example, the operator operates the labeler's control lever to remove the cassette with low remaining labels from the labeler body, and then installs the new cassette into the labeler body.

[0065] Despite the measures taken to acquire identification information via the second and third antennas and the subsequent judgment process, in order to prepare for the possibility that the wrong label roll may still be replaced, or as a fail-safe in the event of a misjudgment in step ST9-2 due to some unforeseen circumstance, a first antenna is activated in step ST9-8, which is located on the labeler body and has a search range limited to a very small area near the location in question. Specifically, when various sensors installed in the device detect that a cassette has been set, the first antenna is activated. Next, in step ST9-9, the first labeling machine 81 determines whether or not the correct label roll has been replaced. In this case, it is convenient to have the display input unit 14 of the control device 10 (console) display details about whether the replacement was performed correctly or not. Figure 11(a) shows an example of the display when the replacement was performed correctly, and Figure 11(b) shows an example of the display when the replacement was performed incorrectly. When it is determined that the correct label has been loaded, in step ST9-10 the labeler operates to return the print head, platen roller, etc., which had been moved to a retracted position for replacement, to the printing position, so that it can issue labels. The hardware and software related to the return movement of these mechanical parts constitute some elements of the label replacement assistance means, but are not limited to this, as will be described later in another embodiment. At this time, the label roll is back-feeded and the printing start position of the label is automatically adjusted. In short, the system is configured so that all preparations for starting work are completed automatically upon determination of whether the correct label has been loaded. On the other hand, if it is determined that a misload has occurred, step ST9-11 will signal the misload by outputting a buzzer and / or displaying an appropriate explanatory message on the labeler's display unit. Conversely, the system may also be configured to prevent label printing when it is determined that an inappropriate label has been loaded. In the case of a typical device that can immediately begin printing once a label roll is loaded, the label printing mechanism may be moved to prevent printing or other operations.

[0066] In step ST10, after the label exchange has been properly completed through this process, the CPU of the first labeling machine 81, for example, performs a process to issue a test label after the cassette has been replaced. The CPU of the first labeling machine 81 also sends a signal to the control device 10 indicating that the cassette exchange is complete and the test label has been issued. Specifically, for example, when an operator operates the test label issuance button (not shown) on the labeler, the CPU of the labeler performs a process to issue a test label in response to the operation of that test label issuance button. The operator checks the printed content and print quality of the test label, and if it is appropriate, they attach the test label to a management ledger, for example, to record the label roll replacement history (cassette replacement history). When issuing test labels with a top-applying labeler (first labeling machine 81 or second labeling machine 82), it is preferable to issue the test labels with the main body of the top-applying labeler moved from above the conveyor 20 to the right or left side in the direction of transport, so as not to come into contact with the products being transported on the conveyor 20.

[0067] Furthermore, the main bodies of the third label applicator 83 and the fourth label applicator 84, which are located below the conveyor 20 and are used for bottom-side labeling, are provided to be retractable towards the front (in the width direction of the conveyor 20). When a cassette is replaced in the third label applicator 83 or the fourth label applicator 84 when the remaining label quantity is small or zero, and a test label is issued, it is preferable to issue the test label with the third label applicator 83 or the fourth label applicator 84 retracted in the width direction of the conveyor 20. In other words, the test label is not output from between the conveyor 21 and the conveyor 22, or between the conveyor 22 and the conveyor 23, so that the test label does not accidentally come into contact with the product being transported by the conveyor. The operator can directly retrieve the test label from the third labeling machine 83 or the fourth labeler, which is pulled out from below the conveyor. The third label application machine 83 and the fourth label application machine 84 for bottom-side application are moved to a predetermined position below the conveyor 20 by an operator or a moving motor (not shown) after the test label has been issued.

[0068] In step ST11, the control device 10 performs a process to prompt the user to read the test label on the display input unit 14 (see Figures 9(b) and 9(c)).

[0069] In step ST12, the labeling machine 81 (in a labeling stopped state) equipped with a new cassette (having a label roll with the maximum amount of remaining label paper) performs a process to issue a test label. Preferably, the test label has the same printed content as the label to be affixed to the product, for example. By issuing test labels and managing them by attaching them to a ledger, it is possible to prevent errors in the printed content of the labels and prevent printing defects such as smudged printing.

[0070] In step ST12, the control device 10 determines whether or not a test label has been detected by the operation input unit or code scanner, and proceeds to step ST11 if no test label has been detected. Otherwise, it proceeds to step ST5, where the control device 10 switches from single-sided mode to alternating mode and controls each labeler.

[0071] In the example described above, the operation of the label issuing device 100 when the remaining label quantity for the top-applying labeler is zero was explained. However, when the remaining label quantity for the bottom-applying labeler is zero, the top-applying labeler described above can be replaced with the bottom-applying labeler, and the bottom-applying labeler described above can be replaced with the top-applying labeler.

[0072] Next, an example of the operation of the label issuing device 100 when the labeler detects the near end will be explained with reference to Figure 12, etc. The operations of steps ST21 to ST26 shown in Figure 12 are substantially the same as the operations of steps ST1 to ST6 in the embodiment shown in Figure 8, so their explanation will be omitted.

[0073] In step ST27, each labeler determines whether the remaining amount of labels is small and below a predetermined amount. The control device 10 also obtains the remaining amount of labels on the label rolls of each labeler based on signals from the first remaining amount detection unit 813, the second remaining amount detection unit 823, the third remaining amount detection unit 833, and the fourth remaining amount detection unit 843, and determines whether the remaining amount of labels on any of the labelers is small and below a predetermined amount. If the remaining amount of labels is below a predetermined amount, the process proceeds to step ST28 in order to replace the cassette of that labeler or to perform label application in one-sided mode. Otherwise, the process proceeds to step ST25, and the application process is performed in alternating mode.

[0074] In step ST28, the control device 10 performs control to switch from alternating mode to one-sided mode. Specifically, the control unit 102 of the control device 10 detects, for example, that the remaining amount of labels in the first labeling machine 81 has reached a predetermined amount, and puts the first labeling machine 81, which has a low remaining amount of labels, into a labeling stop state. The control unit 102 then outputs a command to the instruction means (instruction unit 104) to change the timing at which the second labeling machine 82, which is for top-surface labeling, performs the label issuance and labeling operations to a second predetermined interval that is shorter than the first predetermined interval. The instruction means (instruction unit 104) instructs the second labeling machine 82 to perform the label issuance and labeling operations at the second predetermined interval. The second labeling machine 82 issues labels and applies labels to the products at the second predetermined interval in response to the instruction received from the control device 10. Specifically, for example, the control device 10 controls the second labeling machine 82 so that the number of labels applied per minute increases from 50 to 100. The third label application machine 83 and the fourth label application machine 84, which are used for bottom-side label application, are controlled by the control device 10 in alternating mode or one-sided mode.

[0075] In step ST29, the control device 10 displays the remaining label quantity for each labeler on the display input unit 14. Specifically, for example, in one-sided mode, it displays the status of the labeler currently applying labels, such as the remaining label quantity. In particular, the control device 10 displays on the display input unit 14 the current status of each labeler and its application machine, associating it with messages such as "Labeler 1: There are XX labels left" or "Labeler 1: The labels will run out in a few minutes, please replace them."

[0076] In step ST30, the control device 10 determines, for example, whether the application of the set number of products (product instruction number) has been completed, or whether to terminate the application process based on a signal from the display input unit 14 or a signal from the stop button (not shown). If the application is completed, the label issuing device 100 terminates its application operation; otherwise, it proceeds to step ST31.

[0077] In step ST31, the determination unit 106 (determination means) of the control device 10 determines whether there are enough labels remaining for each labeler if the labeler continues to apply labels in one-sided mode, based on the remaining label quantity, the number of products indicated, and the number of remaining products (unlabeled products) (number of unlabeled products). If it determines that there are enough labels, the process proceeds to step ST28 and labels are applied in one-sided mode. If it determines that there are not enough labels, the process proceeds to step ST32. In other words, the determination unit 106 (determination means) determines whether the labeling work can be completed in one-sided mode without replacing the labeler cassette with a cassette containing a new label roll. If it determines that it can be completed, it proceeds to step ST28 and performs labeling in one-sided mode. If it determines that it is insufficient, it proceeds to step ST32. If the result of the judgment in step ST31 indicates that the label application can be completed without replacing the label, the warning display unit 145 located above the conveyor 20 will light up yellow. If the label application cannot be completed without replacing the label, the warning display unit 145 located above the conveyor 20 will flash yellow. Furthermore, when the labeler detects the near end, a second antenna, which is an RFID tag detection antenna for acquiring the identification information of the RFID tag attached to the label roll that should be in storage, is activated, and the label applicator 80 determines whether the identification information of the currently set label roll matches the identification information of the tag attached to the label roll that should be in storage. If they do not match, and the applicator can be completed without replacing the label, the warning display unit 145 located above the conveyor 20 lights up red. Even if the applicator can be completed, it is very meaningful to inform the worker early that the correct label roll is not in stock. On the other hand, if the applicator cannot be completed without replacing the label, notification is naturally given. Specifically, the warning display unit 145 located above the conveyor 20 flashes red.

[0078] In step ST32, the control device 10 provides notification prompting the user to replace the cassette (replace it with a new label roll). For example, the control device 10 displays a message on the display input unit 14 indicating that the cassette of the labeler with a remaining amount below a predetermined amount should be replaced.

[0079] The process following step ST32 is substantially the same as the processes in steps ST8 to ST12 of the embodiment shown in Figure 8, so its explanation will be omitted. In detail, the label issuing device 100 processes steps ST9 to ST12, which are processes related to a labeler with a low remaining amount of labels (e.g., the first label applicator 81) (such as cassette replacement), and the process in step ST8, which is a one-sided label applicating process for a normal labeler (e.g., the second label applicator 82), in parallel. After processing in steps ST8 to ST12, the process proceeds to step ST25, where labels are applied to the products in alternating mode. The labeling process ends when labels have been applied to all products of the specified quantity (ST26).

[0080] [Another example of how a label printing device works] The operation of the label issuing device 100 is not limited to the embodiments described above. For example, if the label rolls of two labelers are replaced simultaneously, the remaining label quantity may reach zero at the same time. Therefore, if the control device detects near-end status in both labelers (when the remaining label quantity becomes small and falls below a predetermined amount), it may notify the user via a display input unit or similar to prioritize replacing the cassette (label roll) of one of the labelers earlier.

[0081] Furthermore, after performing control to switch from alternating mode to one-sided mode, the control device 10 can also switch from the currently operating label issuing device to performing the label application operation using only one other label issuing device. In this case, the timing of the label application operation can be changed from a second predetermined interval to an instruction to the other label issuing device to perform the operation at a second predetermined interval. Furthermore, it is possible to drive the sign pole with multiple colors, and to assign different driving modes (lighting or flashing) depending on whether the labeler has had its end detected or not. In the first embodiment, three colors are displayed according to three states: whether the correct label is placed, whether the label is not placed, and whether the wrong label is placed. However, the latter two states are treated the same, and when it is detected that there is no stock of the labeler that has had its end detected or that the wrong stock is placed, and the light turns red, it is possible to determine whether there is stock of other labels that have not yet had their end detected, or what type they are, and if they are not correct, light up with a third color (for example, purple). When the stock status of a labeler that needs to be replaced is not correct, it is also possible to know the stock status of labels that will eventually need to be replaced.

[0082] [Another embodiment (Example of application with a single labeler)] In particular, although not shown in the illustrations, the present invention is also applicable to conventional label issuing devices with a single labeler. Even if work is stopped for label replacement, it is preferable that this be done quickly, so it is very meaningful to be able to determine whether the correct labels are in the stock location and inform the operator. In the first embodiment, depending on the type of label application operation, the detection method for when the label roll remaining amount is zero and the detection method for when it is below a predetermined amount were used separately. However, in the case of a conventional label issuing device with a single labeler, a near-end detection configuration is important for realizing quick replacement work. However, just because it is end detection does not mean that it is completely meaningless. In addition, the activation of the second antenna, which is an RFID tag detection antenna, in order to acquire identification information may be configured to be performed not only when near-end detection or end detection occurs, but also when a request is made by the worker due to the worker operating the control device 10 (console). Furthermore, in addition to the warning display unit 145, any means other than the warning display unit 145 can be used as a notification activation means, as long as the operator can recognize from a distance whether or not the labeling is finished and the corresponding label roll is in the label storage location. For example, the label issuing device can be moved to allow visual confirmation, or multiple types of buzzer sounds can be output to allow recognition, and these methods are also included in the present invention. Furthermore, it is convenient to have the display input unit 14 of the control device 10 (console) display a detailed display that allows a worker who has observed the device from a distance to approach the label issuing device 100, so that they can confirm the currently set label type and the label type in the label storage location. Figure 13 shows an example of such a display, where (a) indicates that the correct label is placed, (b) indicates that the wrong label is placed, and (c) indicates that the labeling is finished and the wrong label is placed.

[0083] [Another embodiment (an example of active use of level exchange assisting means)] In the first embodiment, the system is configured so that all preparations for starting work are completed automatically by determining whether the correct label has been loaded. However, it is also possible to further advance this configuration. For example, it is conceivable to include an operating program that writes specific product information into the RFID tag of the label roll, and when the label roll is set, the antenna activates to read the information and automatically sets the read product as a product. By doing so, when the device is first operated on a business day, setting the label roll cassette will automatically perform the product selection process without having to select the product from the settings screen, further improving on-site work efficiency.

[0084] [Another Embodiment (Another Example of Identification Information Acquisition)] In the first embodiment, the antenna is activated to read the identification information of the RFID tag. However, the problem can also be solved by using code information (barcode, QR code (registered trademark), etc.) instead of RFID tags as the identification information provided on the label roll, and by providing a means for acquiring code information, such as a code scanner, within the device to acquire the identification information under predetermined conditions, such as when changing cassettes.

[0085] <Summary of Embodiments> [Technical field] This invention relates to a label issuing device. [Background technology] A label issuing device that affixes labels to products on a conveyor belt is known (see, for example, Patent Document 1). The label issuing device described in Patent Document 1 is equipped with multiple labeling machines (so-called "labelers," and may be referred to by this name hereafter) that affix labels to products on a conveyor belt, and these multiple labeling machines affix labels in turn. [Prior art document] [Patent] [Patent Document 1] Japanese Unexamined Patent Publication No. 2000-318227 [Overview of the prefecture] [Problems the invention aims to solve] However, with the label issuing device described in Patent Document 1, if the labels run out during operation, the entire system must be stopped before the labels can be replaced, which significantly reduces work efficiency. Therefore, one possible approach is to install multiple labelers and apply labels alternately, adjusting the end timing of the multiple label rolls appropriately so that the label replacement work is performed when one labeler runs out, while the other labeler continues the application work independently in a nonstop manner. However, even with this approach, there is still room for improvement. It is common practice to provide a stock area (label storage location) near the label issuing device to store spare label rolls so that labels can be replaced quickly when they run out, but if the stock runs out or the wrong type of label roll is stored there, the significance of the nonstop method that has been achieved is diminished. Furthermore, this problem of stock running out is not limited to the nonstop method with twin labelers, but is also a problem for a normal label issuing device with a single labeler. In other words, even if the work is stopped for label replacement, it is better if it is done quickly. Regardless of the method used, it is essential that the replacement process be completed quickly and reliably. The situation of loading the wrong label roll must be avoided at all costs, and if such a situation occurs, a swift response is necessary. [Means for solving the problem] (1) As described above, one aspect of this embodiment is a label issuing device (100) for attaching labels to products, comprising an identification information acquisition means (AT), an information acquisition instruction means (control unit 102), a determination means (control unit 102), and a label replacement assist means, wherein the identification information acquisition means (AT) is a first antenna configured to acquire identification information of a tag attached to a label roll in the loading position, the information acquisition instruction means (control unit 102) instructs to activate the first antenna under predetermined conditions, the determination means (control unit 102) determines whether the identification information of the currently set label roll matches the identification information of a tag attached to a label roll that has been replaced or is about to be replaced, and the label replacement assist means operates so that the label roll replacement work is completed when the determination means (control unit 102) determines that there is a match. With the above configuration, reliable replacement work can be completed quickly, and a prompt response can be taken if the wrong label roll is loaded.

[0086] (2) One aspect of this embodiment is the label issuing device 100 described in (1), wherein the label replacement assisting means moves the transport section of the issuing device when the label roll is replaced. With the above configuration, replacement work can be carried out quickly.

[0087] (3) One aspect of this embodiment is the label issuing device (100) described in (1) or (2), wherein the determination means is capable of setting and storing information of the label roll used for the product being processed, thereby determining whether the set identification information of the label roll matches the identification information of the tag attached to the label roll that has been replaced or is about to be replaced. With the above configuration, it is possible to quickly respond to cases where label rolls with incorrect specifications or label rolls that are not intended for use with the product are loaded.

[0088] (4) One aspect of this embodiment is a label issuing device 100 described in any one of (1) to (3), wherein the label issuing device is equipped with a plurality of label application units and is configured to allow label application work to continue even after the label roll of one label application unit has run out. The above configuration allows for greater utilization of the advantages of the twin labeler system.

[0089] Although embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments, and any design changes, etc., that do not depart from the spirit of the present invention are also included. Furthermore, the embodiments shown in the figures above can be combined, provided there are no particular inconsistencies or problems in terms of purpose, structure, etc. Furthermore, each figure can represent an independent embodiment, and the embodiments of the present invention are not limited to a single embodiment formed by combining each figure. [Explanation of Symbols]

[0090] 10...Control device 11…CPU 12...Storage section 13… Communications Department 14…Display Input Section 17. Product detection sensor (also called item detection unit or product sensor) 20 (21, 22, 23)... Conveyor (also called transport conveyor) 80... Labeling machine 81…First label application machine (label application section, label application machine) 82...Second label application machine (label application section, label application machine) 83…Third label application machine (label application section, label application machine) 84…Fourth label application machine (label application section, label application machine) 100... Label printing device 102...Control unit (data generation unit and control means) 104...Instruction unit (instruction means) 105…Acquisition section 106...Judgment section 141...Display unit (Notification unit) 142... Operation input section 143…Test label detection unit (code scanner, etc.) 200... Cassette 210... Cassette cover

Claims

1. A label issuing device that issues labels to be contained in a cassette to be attached to a product, It comprises a label application unit, an identification information acquisition means, a determination means, and a label replacement assistance means, The aforementioned identification information acquisition means is a first antenna, which is configured to acquire identification information of a tag attached to a label roll at the loading position. The determination means determines whether the identification information of the currently set label roll matches the identification information of the tag attached to the label roll housed in the cassette that has been replaced or is about to be replaced. The label replacement assisting means moves the transport unit of the issuing device away from the application position when the label roll is replaced, and when the determination means determines that they do not match, it does not return the print head of the label application unit to the print position. A label issuing device characterized by the following features.

2. The first antenna is provided on the top or side of the label body. The label issuing device according to feature 1.

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