Label inspection device, label inspection system and label inspection method

Abstract

The invention discloses a label inspection device, a label inspection system and a label inspection method, and relates to the technical field of intelligent manufacturing. The label inspection device comprises a base, a detection jig, a marking mechanism and an upper cover mechanism, and the base is provided with a label groove; the detection jig is provided with a marking slide rail, a first label clamping plate and a second label clamping plate, and the first label clamping plate and the second label clamping plate are slidably arranged along the marking slide rail; the marking mechanism is installed on the detection jig and used for marking position information of the first label clamping plate and the second label clamping plate on the marking sliding rail. According to the label inspection device provided by the invention, errors caused in a manual observation process can be effectively avoided, and the consistency of label inspection standards is realized; in addition, due to the arrangement of the label inspection device, the deflection condition of the label can be visually observed, the installation position of the label paper can be conveniently adjusted in a targeted mode, the adjustment efficiency of the label paper can be improved, and then the label printing efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of intelligent manufacturing technology, and in particular to a label inspection device for inspecting labels. In addition, the present invention also relates to a label inspection system including the label inspection device and a label inspection method applied to the label inspection system. Background Art

[0002] In the field of intelligent manufacturing, various labels need to be attached. The correctness of the labels directly affects the quality of the product and customer satisfaction, and thus affects the user's intuitive experience. For centrally printed label products, once the labels do not meet the appearance requirements, the batch-printed labels will be scrapped, increasing the label cost.

[0003] The correctness of labels is divided into the correctness of label content and the correctness of appearance. The correctness of label content means that the text, icons and other contents in the label meet the product requirements. The correctness of appearance means that the printed label content must meet the appearance inspection standards, such as blurred handwriting, offset of text, icons, etc. The appearance of offset label content generally relies on visual inspection. Visual inspection relies on the experience of inspectors, and there are deviations between the senses of different inspectors, resulting in poor consistency in label quality, which can easily lead to the outflow of products that do not meet the appearance requirements and cause customer complaints.

[0004] Poor label printing appearance deviation generally occurs when replacing labels and carbon ribbons. The correctness of the installation position of the labels and carbon ribbons in the printer directly affects whether the printed labels are offset. After the deviation is maintained by the equipment personnel and meets the appearance requirements, deviation will generally not occur.

[0005] In summary, how to provide a label inspection device that can inspect the display correctness of a label is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the invention

[0006] The object of the present invention is to provide a label inspection device, which can inspect the display correctness of the label, so as to facilitate the adjustment of the installation position of the label paper and improve the installation accuracy of the label paper.

[0007] In addition, another object of the present invention is to provide a label inspection system including the above-mentioned label inspection device and a label inspection method applied to the above-mentioned label inspection system.

[0008] In order to solve the above technical problems, the present invention provides a label inspection device, comprising:

[0009] A base, provided with a label slot for placing a label to be detected;

[0010] A detection jig is fixedly mounted on the base, and the detection jig is provided with a marking slide rail, a first label clamping plate and a second label clamping plate, and the first label clamping plate and the second label clamping plate can be slidably arranged along the marking slide rail;

[0011] A marking mechanism, installed on the detection fixture, and used to mark the position information of the first label clamping plate and the second label clamping plate on the marking slide rail;

[0012] The upper cover mechanism is arranged on the upper surface of the detection fixture, and the upper cover mechanism is provided with an observation window for observing the position of the label in the label slot.

[0013] On the one hand, the detection fixture includes:

[0014] A slide rail mounting seat, provided with a positioning groove for fixing the marking slide rail;

[0015] The marking slide rail is installed in the positioning groove of the slide rail mounting seat to limit the axial movement of the marking slide rail;

[0016] At least two groups of slider connectors are mounted on the marking slide rail and are slidably arranged along the marking slide rail, the first label clamp is mounted on one group of the slider connectors, and the second label clamp is mounted on the other group of the slider connectors;

[0017] The marking mechanism includes a position mark arranged on the marking slide rail, and the position mark is used to display the axial position information of the first label clamping plate and the second label clamping plate on the marking slide rail.

[0018] On the other hand, the marking mechanism further comprises:

[0019] A display mechanism, disposed on the slide rail mounting seat, the display mechanism being used to display position information of the first label clamping plate and the second label clamping plate on the marking slide rail;

[0020] The transmission mechanism includes a rotating member, a conversion component transmission-connected to the rotating member, a linear encoder connected to the rotating member, and a first controller; the conversion component is used to convert the movement of the slider connector into the rotation of the rotating member, the linear encoder is used to obtain the rotation information of the rotating member and transmit the rotation information to the first controller, the first controller obtains the position information of the slider connector according to the rotation information, and transmits the position information to the display mechanism, and controls the display mechanism to display the position information.

[0021] On the other hand, the detection fixture also includes a camera, which is used to obtain image information of the first label clamp, the second label clamp and the label, and send the image information to the first controller. The first controller obtains position image information of the label based on the image information, and sends the position image information to the display mechanism to control the display mechanism to display the position image information.

[0022] On the other hand, the slider connector is equipped with a pull rod, and the pull rod extends out of the upper cover mechanism; or, the detection fixture further includes a power member for driving the slider connector to move along the marking slide rail, and the power member is connected to the first controller to control the start and stop of the power member through the first controller;

[0023] The conversion assembly includes a rack provided on the slider connector, and the rotating member is a gear meshing with the rack for transmission;

[0024] The rail mounting seat includes a first mounting seat arranged at the lower side of the marking rail and a second mounting seat arranged at the upper side of the marking rail, and the positioning groove includes a first recessed portion arranged at the first mounting seat and a second recessed portion installed at the second mounting seat;

[0025] The upper cover mechanism is detachably mounted on the upper surface of the slide rail mounting seat, and the upper cover mechanism is provided with a slide groove extending along the moving direction of the pull rod, and the pull rod passes through the slide groove and extends out of the upper cover mechanism;

[0026] The slide groove includes a first branch slide groove and a second branch slide groove that are arranged opposite to each other, and the first branch slide groove is parallel to the second branch slide groove; or, the slide groove includes a first branch slide groove, a second branch slide groove, a third branch slide groove and a fourth branch slide groove, the first branch slide groove is parallel to the second branch slide groove, the third branch slide groove is parallel to the fourth branch slide groove, and the distance between the first branch slide groove and the second branch slide groove is equal to the distance between the third branch slide groove and the fourth branch slide groove; or, the slide groove is a square ring structure;

[0027] The upper cover mechanism is provided with a handle for easy transfer; the side surface of the slide rail mounting seat is provided with a handle for easy transfer;

[0028] The base is provided with a slot communicating with the label slot, and at least one side of the label slot is provided with the slot to facilitate taking and placing the label.

[0029] On the other hand, the label inspection device further includes a third label clamping plate and a fourth label clamping plate;

[0030] The slide rail mounting seat comprises a first positioning groove, a second positioning groove, a third positioning groove and a fourth positioning groove, and the setting height of the third positioning groove and the fourth positioning groove is higher than the setting height of the first positioning groove and the second positioning groove;

[0031] The marking slide rail comprises a first marking slide rail and a second marking slide rail, the first marking slide rail is installed in the first positioning groove and the second positioning groove, the second marking slide rail is installed in the third positioning groove and the fourth positioning groove, the second marking slide rail is mounted on the upper part of the first marking slide rail, and the axial direction of the first marking slide rail is perpendicular to the axial direction of the second marking slide rail;

[0032] The slider connector includes a first slider connector, a second slider connector, a third slider connector, and a fourth slider connector. The first slider connector and the second slider connector are slidably arranged on the first marking slide rail, the first label clamp is installed on the first slider connector, and the second label clamp is installed on the second slider connector; the third slider connector and the fourth slider connector are slidably arranged on the second marking slide rail, the third label clamp is installed on the third slider connector, and the fourth label clamp is installed on the fourth slider connector.

[0033] On the other hand, the slide rail mounting seat includes a fifth positioning groove, a sixth positioning groove, a seventh positioning groove and an eighth positioning groove; the fifth positioning groove, the sixth positioning groove, the seventh positioning groove and the eighth positioning groove are respectively arranged on four sides of the same square;

[0034] One of the base and the slide rail mounting seat is provided with four positioning recesses, and the other is provided with four positioning protrusions that cooperate and plug with the four positioning recesses. The four positioning recesses are arranged at four angles in the same positive direction, so that the slide rail mounting seat can be installed on the base after being rotated 90° relative to the base.

[0035] A label inspection system comprises the label inspection device as described in any one of the above, a label printing device and a host computer, wherein the label printing device is connected to the host computer.

[0036] A label inspection method is applied to the label inspection system described above, and the label inspection method comprises:

[0037] Obtain the appearance deviation standard corresponding to the label to be detected;

[0038] selecting a reference feature of the tag according to the offset criterion;

[0039] Acquiring position information corresponding to the reference feature;

[0040] Obtaining the lowest position information and the highest position information of the reference feature according to the position information;

[0041] Controlling the first label clamp to move to a position corresponding to the lowest position information, and controlling the second label clamp to move to a position corresponding to the highest position information;

[0042] Determine whether the reference feature is located between the position corresponding to the lowest position information and the position corresponding to the highest position information. If so, the label is within the appearance deviation standard in the current detection direction; if so, the label is outside the appearance deviation standard in the current detection direction.

[0043] On the one hand, the tag further includes:

[0044] Controlling the first label clamp to move in a direction smaller than the position corresponding to the lowest position information, and controlling the second label clamp to move in a direction larger than the position corresponding to the highest position information, until the reference feature is located within a position range between the first label clamp and the second label clamp;

[0045] Obtaining current position information corresponding to the current reference feature;

[0046] Obtaining offset position information of the reference feature according to the current position information, the lowest position information, and the highest position information;

[0047] The installation position of the label paper in the label printing device is adjusted according to the offset position information.

[0048] It can be seen from the above technical scheme that, in the actual use of the label inspection device provided by the present invention, it is first necessary to assemble the label inspection device, and then place the label into the label slot. At this time, the position coordinates of the label in the marking mechanism are the same as the position coordinates of the label in the label printing device, obtain the appearance offset standard corresponding to the label to be detected, and select the reference feature of the label according to the offset standard; obtain the position information corresponding to the reference feature, and obtain the lowest position information and the highest position information of the reference feature according to the position information; control the first label clamp to move to the position corresponding to the lowest position information, and control the second label clamp to move to the position corresponding to the highest position information; if the reference feature is between the position corresponding to the lowest position information and the position corresponding to the highest position information, the label is within the appearance offset standard in the current detection direction and meets the requirements; if the reference feature is not between the position corresponding to the lowest position information and the position corresponding to the highest position information, the label is outside the appearance offset standard in the current detection direction and does not meet the requirements, and the installation position of the label paper in the label printing device needs to be adjusted.

[0049] The beneficial effects of the present invention are that the present invention provides a label inspection device that can inspect labels, which can effectively avoid errors caused by human observation, achieve consistency in label inspection standards, and effectively avoid inspection errors caused by different observers or the same observer in different states during human observation; in addition, the setting of the label inspection device can intuitively observe the skewness of the label, facilitate targeted adjustment of the installation position of the label paper, and is beneficial to improving the adjustment efficiency of the label paper, thereby improving the label printing efficiency; in addition, the label inspection device provided by the present invention has a simple structure and is easy to operate.

[0050] In addition, the present invention also provides a label inspection system including the above-mentioned label inspection device and a label inspection method applied to the above-mentioned label inspection system. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0052] Figure 1 A schematic diagram of the structure of the base provided by the present invention;

[0053] Figure 2 For tags installed on Figure 1 Schematic diagram of the structure of the middle base;

[0054] Figure 3 It is a schematic diagram of the structure of the detection fixture and marking mechanism;

[0055] Figure 4 for Figure 3 A bottom view of the inspection fixture and marking mechanism;

[0056] Figure 5 is a top view schematic diagram of a first mounting seat;

[0057] Figure 6 is a bottom view schematic diagram of the first mounting seat;

[0058] Figure 7 A schematic diagram for marking the structure of the slide rail and the mounting parts thereon;

[0059] Figure 8 for Figure 7 A schematic structural diagram of the slide rail and the mounting parts thereon from another angle;

[0060] Fig. 9 It is a schematic diagram of the structure of the linear encoder;

[0061] Fig.10 A structural diagram of a marked slide rail;

[0062] Fig.11 is a structural schematic diagram of a slider connector;

[0063] Fig.12 is a top view schematic diagram of the second mounting base;

[0064] Fig.13 is a bottom view schematic diagram of the second mounting base;

[0065] Fig.14 It is a top view schematic diagram of the upper cover mechanism;

[0066] Fig.15 It is a bottom view schematic diagram of the upper cover mechanism;

[0067] Fig.16 It is a structural schematic diagram of the label inspection device in a first use state;

[0068] Fig.17 for Fig.16 A schematic diagram of the structure of the label inspection device after the upper cover mechanism is removed;

[0069] Fig.18 is a schematic diagram of the structure of the label inspection device in the second use state;

[0070] Fig.19 for Fig.18 A schematic diagram of the structure of the label inspection device after the upper cover mechanism is removed;

[0071] Fig. 20 It is a schematic diagram of the inspection process of the label inspection device;

[0072] Fig.21 A schematic diagram of the inspection result of the label inspection device;

[0073] Fig. 22 Schematic diagram of the process of label inspection.

[0074] Figures 1 to 22 middle:

[0075] 1- Base;

[0076] 11-label slot, 12-upper slot, 13-lower slot, 14-positioning recess;

[0077] 2-Detection fixture;

[0078] 21-slide rail mounting seat, 211-first mounting seat, 2111-positioning protrusion, 2112-first screw hole, 2113-first positioning hole, 2114-first recess; 212-second mounting seat, 2121-first positioning column, 2122-second positioning hole, 2123-second screw hole, 2124-second recess, 2125-handle;

[0079] 22-Mark the slide rails;

[0080] 23-slider connector, 231-pull rod, 232-connecting rod, 233-mounting hole, 234-connecting screw, 235-plug hole, 236-third screw hole;

[0081] 24-first label clamping plate;

[0082] 25- second label clamping plate;

[0083] 3-Marking agency;

[0084] 31-display mechanism, 32-position mark, 33-linear encoder;

[0085] 4- Upper cover mechanism;

[0086] 41-slideway, 42-handle, 43-second positioning column, 44-observation window;

[0087] 5- Label;

[0088] 51-Tag separator line. DETAILED DESCRIPTION

[0089] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0090] The label inspection device mentioned in the present application can be applied to the field of intelligent manufacturing technology, specifically, the field of server manufacturing technology, or the manufacturing field of other intelligent devices.

[0091] The present specific embodiment discloses a label inspection device, comprising a base 1, a detection jig 2, a marking mechanism 3 and an upper cover mechanism 4, wherein the base 1 is provided with a label slot 11 for placing a label 5 to be detected; the detection jig 2 is fixedly installed on the base 1, and the detection jig 2 is provided with a marking slide rail 22, a first label clamp 24 and a second label clamp 25, and the first label clamp 24 and the second label clamp 25 can be slidably arranged along the marking slide rail 22; the marking mechanism 3 is installed on the detection jig 2, and the marking mechanism 3 is used to mark the position information of the first label clamp 24 and the second label clamp 25 on the marking slide rail 22; the upper cover mechanism 4 is arranged on the upper surface of the detection jig 2, and the upper cover mechanism 4 is provided with an observation window 44 for observing the position of the label 5 in the label slot 11.

[0092] like Figure 1 As shown, a slot connected to the label slot 11 can be provided on the base 1, and at least one side of the label slot 11 can be provided with a slot to facilitate the removal and placement of the label 5; specifically, an upper slot 12 can be provided on the upper side of the label slot 11, and a lower slot 13 can be provided on the lower side of the label slot 11.

[0093] The label inspection device provided in this specific embodiment needs to be assembled during actual use, and then the label inspection device needs to be placed in the label slot 11. At this time, the position coordinates of the label 5 in the marking mechanism 3 are the same as the position coordinates of the label 5 in the label printing device. The appearance offset standard corresponding to the label 5 to be detected is obtained, and the reference feature of the label 5 is selected according to the offset standard; the position information corresponding to the reference feature is obtained, and the lowest position information and the highest position information of the reference feature are obtained according to the position information; the first label clamp 24 is controlled to move to the position corresponding to the lowest position information, and the second label clamp 25 is controlled to move to the position corresponding to the highest position information; if the reference feature is between the position corresponding to the lowest position information and the position corresponding to the highest position information, the label 5 is within the appearance offset standard in the current detection direction and meets the requirements; if the reference feature is not between the position corresponding to the lowest position information and the position corresponding to the highest position information, the label 5 is outside the appearance offset standard in the current detection direction and does not meet the requirements, and the installation position of the label paper in the label printing device needs to be adjusted.

[0094] This specific embodiment provides a label inspection device that can inspect the label 5, which can effectively avoid errors caused by human observation, achieve consistency in the inspection standard of the label 5, and effectively avoid inspection errors caused by different observers or the same observer in different states during the human observation process; in addition, the setting of the label inspection device can intuitively observe the deflection of the label 5, which is convenient for targeted adjustment of the installation position of the label paper, which is beneficial to improving the adjustment efficiency of the label paper, and then improving the printing efficiency of the label 5; in addition, the label inspection device provided by the present invention has a simple structure and is easy to operate.

[0095] It should be noted that, through preliminary design, the position corresponding to the position coordinates of the label 5 after it is placed in the label slot 11 can be consistent with the position corresponding to the label 5 in the label printing device; for example, the label 5 printing paper is at the (0, 5) position of the first axis in the coordinate system in the printing device, and when the label 5 is placed in the label slot 11, the label 5 is at the (0, 5) position of the coordinate system where the position mark 32 is located.

[0096] On the basis of the above embodiments, the detection fixture 2 can include a slide rail mounting seat 21, a marking slide rail 22, and at least two groups of slider connectors 23; wherein the slide rail mounting seat 21 is provided with a positioning groove for fixing the marking slide rail 22; the marking slide rail 22 is installed in the positioning groove of the slide rail mounting seat 21 to limit the axial movement of the marking slide rail 22; at least two groups of slider connectors 23 are installed on the marking slide rail 22 and are slidably arranged along the marking slide rail 22, the first label clamp 24 is installed on one group of slider connectors 23, and the second label clamp 25 is installed on the other group of slider connectors 23; the marking mechanism 3 includes a position mark 32 arranged on the marking slide rail 22, and the position mark 32 is used to display the axial position information of the first label clamp 24 and the second label clamp 25 in the marking slide rail 22.

[0097] In actual use, by moving the first label clamp 24 and the second label clamp 25 on the marking slide rail 22, the first label clamp 24 can be moved to the upper limit position of the offset standard corresponding to the reference feature in the label 5, and the second label clamp 25 can be moved to the lower limit position of the offset standard corresponding to the reference feature in the label 5. When the reference feature is between the upper limit position and the lower limit position, it means that the reference feature meets the offset standard requirements. When the reference feature is not between the upper limit position and the lower limit position, it means that the reference feature does not meet the offset standard requirements.

[0098] It needs to be explained that if Figure 3 , Figure 4 As shown, two marking rails 22 are generally provided, and the two marking rails 22 are arranged in parallel and at intervals, such as Fig.11As shown, the slider connector 23 includes two sliders, each of which is provided with a plug hole 235, into which the marking slide rail 22 is inserted, and a mounting hole 233 is provided on one side of the slider, at which a pull rod 231 is installed, and the pull rod 231 extends out of the upper cover mechanism 4, and in actual use, the slider connector 23 can be driven to move relative to the marking slide rail 22 by the pull rod 231. The slider of the slider connector 23 is provided with a third screw hole 236, which is combined with the Figure 7 It can be seen that the connecting screw 234 fixes the first label clamping plate 24 to the slider connector 23 through the third screw hole 236 .

[0099] Of course, the detection fixture 2 can also include a power component for driving the slider connector 23 to move along the marking slide rail 22, and the power component is connected to the first controller to control the start and stop of the power component through the first controller to realize the automatic movement or automatic stop of the slider connector 23 relative to the marking slide rail 22.

[0100] like Fig.10 As shown, a position mark 32 is provided on the marking rail 22. In actual use, the positions corresponding to the first label clamp 24 and the second label clamp 25 can be determined by the position marks 32 corresponding to the first label clamp 24 and the second label clamp 25 on the marking rail 22.

[0101] In this specific embodiment, by setting a position mark 32 on the marking slide rail 22, it is possible to mark the positions corresponding to the first label clamp 24 and the second label clamp 25 on the marking slide rail 22, thereby reading the position information of the first label clamp 24 and the second label clamp 25 on the marking slide rail 22; the operation process is convenient and low-cost.

[0102] In a specific embodiment, the marking mechanism 3 may further include a display mechanism 31 and a transmission mechanism, wherein the display mechanism 31 is disposed on the slide rail mounting seat 21, and the display mechanism 31 is used to display the position information of the first label clamp 24 and the second label clamp 25 on the marking slide rail 22; the transmission mechanism includes a rotating member, a conversion component transmission-connected to the rotating member, a linear encoder 33 connected to the rotating member, and a first controller; the conversion component is used to convert the movement of the slider connector 23 into the rotation of the rotating member, and the linear encoder 33 is used to obtain the rotation information of the rotating member, including the number of rotations and the rotation direction, and transmit the rotation information to the first controller, the first controller obtains the position information of the slider connector 23 according to the rotation information, and transmits the position information to the display mechanism 31, and controls the display mechanism 31 to display the position information.

[0103] During actual use, the conversion component can include a rack set on the slider connector 23, and the rotating part is a gear meshing with the rack for transmission; the slider connector 23 will drive the rack in the conversion component to move during the sliding process along the marking slide rail 22, and the rack will drive the gear to rotate during the movement. The gear is connected to the linear encoder 33, and the linear encoder 33 obtains the transmission information of the gear. The first controller obtains the moving direction and moving distance of the slider connector 23 relative to the marking slide rail 22 according to the rotation information, and the current position information of the slider connector 23 can be obtained in combination with the most recent position of the slider connector 23. The first control device transmits the current position information of the slider connector 23 to the display mechanism 31, and the display mechanism 31 is used to display the current position information of the slider connector 23.

[0104] It should be noted that the display mechanism 31 can be set as a display, which is only used to display the position coordinates of the corresponding first label clamp 24 or the second label clamp 25, and can also be used to display the image information of the marking slide rail 22, the first label clamp 24 or the second label clamp 25. The position information of the first label clamp 24 or the second label clamp 25 on the marking slide rail 22 can be intuitively observed through the image. The specific position information is determined according to actual conditions and will not be elaborated here.

[0105] The linear encoder 33 mentioned in this specific embodiment may be a wireless linear encoder 33, or may be other linear encoders 33 that meet the requirements, which is determined according to actual conditions.

[0106] In this specific embodiment, by setting up a display mechanism 31, the position information of the first label clamp 24 or the second label clamp 25 on the marking slide rail 22 can be intuitively displayed, avoiding the operation of observing the position of the first label clamp 24 or the second label clamp 25 on the marking slide rail 22 through the upper cover mechanism 4, and further simplifying the inspection steps.

[0107] On the basis of the above embodiment, in order to more intuitively observe the position information of the first label clamp 24 or the second label clamp 25 on the marking slide rail 22, the detection fixture 2 can also include a shooting component, which is used to obtain image information of the first label clamp 24, the second label clamp 25 and the label 5, and send the image information to the first controller. The first controller obtains the position image information of the label 5 according to the image information, and sends the position image information to the display mechanism 31, and controls the display mechanism 31 to display the position image information.

[0108] The camera can be arranged on the inner side of the slide rail mounting seat 21 to obtain Figure 7 The structure shown in the figure shows image information of the relative position of the label 5 in the label slot 11 of the base 1, and sends the image information to the first controller, and the first controller controls the display mechanism 31 to display the image information.

[0109] In this specific embodiment, by providing a shooting component, the display mechanism 31 can more intuitively observe the position information of the first label clamp 24 or the second label clamp 25 on the marking slide rail 22, and can observe the movement of the first label clamp 24 or the second label clamp 25 on the marking slide rail 22, so that the position information of the first label clamp 24 or the second label clamp 25 on the marking slide rail 22 is more intuitive and easy to understand, and it is also convenient to obtain the inspection results.

[0110] Based on the above embodiment, the slide rail mounting seat 21 can include a first mounting seat 211 arranged on the lower side of the marking slide rail 22 and a second mounting seat 212 arranged on the upper side of the marking slide rail 22, and the positioning groove includes a first recess 2114 arranged on the first mounting seat 211 and a second recess 2124 installed on the second mounting seat 212.

[0111] like Figure 6 As shown, the first mounting seat 211 is provided with a positioning protrusion 2111. Figure 1 As shown, the base 1 is provided with a positioning recess 14. During the assembly process, the positioning protrusion 2111 is inserted into the positioning recess 14 to achieve the installation of the first mounting seat 211 and the base 1. Specifically, the positioning protrusion 2111 can be set at four angles of the same square. When installing the first mounting seat 211, the first mounting seat 211 can be rotated 90°, 180° or 270° relative to the base 1 and can still be installed. Figure 5 As shown, the first mounting seat 211 is provided with a first recess 2114. Fig.13 As shown, the second mounting seat 212 is provided with a second recess 2124. During the installation of the marking rail 22, the marking rail 22 is first installed in the first recess 2114, and then the second mounting seat 212 is buckled on the upper part of the first mounting seat 211, and the second recess 2124 corresponds to the first recess 2114. The marking rail 22 is located in the space formed by the first recess 2114 and the second recess 2124. Figure 5 As shown, the first mounting seat 211 is provided with a first positioning hole 2113. Fig.13 As shown, the second mounting seat 212 is provided with a first positioning column 2121. In the actual installation process, the first positioning column 2121 is inserted into the first positioning hole 2113 and connected to the first screw hole 2112 by screws to achieve the fixed installation of the first mounting seat 211 and the second mounting seat 212. Specifically, the first positioning hole 2113 can be set at the four angles of the same square. When installing the second mounting seat 212, the second mounting seat 212 can be rotated 90°, 180° or 270° relative to the first mounting seat 211 and can still be installed. Fig.12 , Fig.13As shown, the second mounting base 212 is provided with a second screw hole 2123 and a second positioning hole 2122. Fig.12 As shown, the number of the second positioning holes 2122 is eight, namely Fig.12 The corresponding positions of A, B, C, D, E, F, G, and H in Fig.15 As shown, the upper cover mechanism 4 is provided with four second positioning posts 43. In actual use, the four second positioning posts 43 of the upper cover mechanism 4 can be inserted into the four second positioning holes 2122 of A, B, C, and D, or the four second positioning posts 43 of the upper cover mechanism 4 can be inserted into the four second positioning holes 2122 of E, F, G, and H to facilitate the inspection of different directions of the label 5.

[0112] like Fig.13 As shown, the second mounting seat 212 is provided with a second screw hole 2123 . During actual installation, the screw passes through the upper cover mechanism 4 and is connected to the second screw hole 2123 , so as to achieve fixed installation of the upper cover mechanism 4 and the second mounting seat 212 .

[0113] like Fig.14 , Fig.15 As shown, the upper cover mechanism 4 is provided with a handle 42 for easy transfer; Fig.12 , Fig.13 As shown, a handle 2125 is provided on the side surface of the slide rail mounting seat 21 for easy transfer.

[0114] like Fig.14 , Fig.15 As shown, the upper cover mechanism 4 is detachably mounted on the upper surface of the slide rail mounting seat 21 , and the upper cover mechanism 4 is provided with a slide groove 41 extending along the moving direction of the pull rod 231 , and the pull rod 231 passes through the slide groove 41 and extends out of the upper cover mechanism 4 .

[0115] Specifically, the slide groove 41 can be configured to include a first branch slide groove and a second branch slide groove that are relatively arranged, and the first branch slide groove is parallel to the second branch slide groove; or, the slide groove 41 includes a first branch slide groove, a second branch slide groove, a third branch slide groove and a fourth branch slide groove, the first branch slide groove is parallel to the second branch slide groove, the third branch slide groove is parallel to the fourth branch slide groove, and the spacing between the first branch slide groove and the second branch slide groove is equal to the spacing between the third branch slide groove and the fourth branch slide groove; or, the slide groove 41 is a square annular structure.

[0116] Of course, depending on the actual situation, the slide groove 41 can also be set to other shapes or quantities, which are determined according to the actual situation and will not be elaborated here.

[0117] In this specific embodiment, by detachably connecting the upper cover mechanism 4 with the slide rail mounting seat 21, the installation angle of the upper cover mechanism 4 relative to the slide rail mounting seat 21 can be adjusted according to the different directions of the reference features inspected by the label 5, so that the same label inspection device can inspect the label 5 in different directions.

[0118] In a specific embodiment, in order to realize the inspection of different directions of the label 5 and avoid repeated disassembly of the detection fixture 2 during the inspection, the label inspection device can also include a third label clamp and a fourth label clamp; the slide rail mounting seat 21 includes a first positioning groove, a second positioning groove, a third positioning groove and a fourth positioning groove, and the setting height of the third positioning groove and the fourth positioning groove is higher than the setting height of the first positioning groove and the second positioning groove; the marking slide rail 22 includes a first marking slide rail and a second marking slide rail, and the two ends of the first marking slide rail are respectively installed in the first positioning groove and the second positioning groove, and the two ends of the second marking slide rail are respectively installed in the third positioning groove and the fourth positioning groove The second marking slide rail is mounted on the upper part of the first marking slide rail, and the axial direction of the first marking slide rail is perpendicular to the axial direction of the second marking slide rail; the slider connector 23 includes a first slider connector, a second slider connector, a third slider connector, and a fourth slider connector. The first slider connector and the second slider connector are slidably arranged on the first marking slide rail, the first label clamp 24 is installed on the first slider connector, and the second label clamp 25 is installed on the second slider connector; the third slider connector and the fourth slider connector are slidably arranged on the second marking slide rail, the third label clamp is installed on the third slider connector, and the fourth label clamp is installed on the fourth slider connector.

[0119] During actual use, when it is necessary to inspect the length direction of the label 5, the third slider connector can be controlled to drive the third label clamp to move to the avoidance position, and the fourth slider connector can drive the fourth label clamp to move to the avoidance position, so that the third label clamp and the fourth label clamp will not affect the inspection of the label 5 by the second label clamp 25 and the first label clamp 24; then the first label clamp 24 is controlled to move to the position corresponding to the lowest position information, and the second label clamp 25 is controlled to move to the position corresponding to the highest position information; if the reference feature is between the position corresponding to the lowest position information and the position corresponding to the highest position information, the label 5 is within the appearance deviation standard in the current detection direction and meets the requirements; if the reference feature is not between the position corresponding to the lowest position information and the position corresponding to the highest position information, the label 5 is outside the appearance deviation standard in the current detection direction and does not meet the requirements, and the label paper needs to be installed in the label printing device. The position is adjusted; when it is necessary to inspect the width direction of the label 5, the first slider connector can be controlled to drive the first label clamp 24 to move to the avoidance position, and the second slider connector can drive the second label clamp 25 to move to the avoidance position, so that the first label clamp 24 and the second label clamp 25 will not affect the inspection of the label 5 by the third label clamp and the fourth label clamp; then the third label clamp is controlled to move to the position corresponding to the lowest position information, and the fourth label clamp is controlled to move to the position corresponding to the highest position information; if the reference feature is located between the position corresponding to the lowest position information and the position corresponding to the highest position information, the label 5 is located within the appearance deviation standard in the current detection direction and meets the requirements; if the reference feature is not located between the position corresponding to the lowest position information and the position corresponding to the highest position information, the label 5 is located outside the appearance deviation standard in the current detection direction and does not meet the requirements, and the installation position of the label paper in the label printing device needs to be adjusted.

[0120] The label inspection device provided in this specific embodiment can realize inspection of the label 5 in two different directions during actual use without disassembling the label inspection device. The operation process is simple and avoids repeated disassembly and assembly. It can effectively improve the inspection quality and efficiency of the label 5.

[0121] On the basis of the above embodiments, the slide rail mounting seat 21 can also include a fifth positioning groove, a sixth positioning groove, a seventh positioning groove and an eighth positioning groove; the fifth positioning groove, the sixth positioning groove, the seventh positioning groove and the eighth positioning groove are respectively arranged on the four sides of the same square; one of the base 1 and the slide rail mounting seat 21 is provided with four positioning recesses 14, and the other is provided with four positioning protrusions 2111 that cooperate with the four positioning recesses 14, and the four positioning recesses 14 are respectively arranged at four angles in the same positive direction, so that the slide rail mounting seat 21 can be installed on the base 1 after rotating 90° relative to the base 1.

[0122] In actual use, the first label clamp 24 is controlled to move to the position corresponding to the lowest position information, and the second label clamp 25 is controlled to move to the position corresponding to the highest position information; if the reference feature is located between the position corresponding to the lowest position information and the position corresponding to the highest position information, the label 5 is located within the appearance deviation standard in the current detection direction and meets the requirements; if the reference feature is not located between the position corresponding to the lowest position information and the position corresponding to the highest position information, the label 5 is located outside the appearance deviation standard in the current detection direction and does not meet the requirements, and the installation position of the label paper in the label printing device needs to be adjusted; when it is necessary to inspect the width direction of the label 5, the inspection fixture needs to be placed first. 2 is separated from the base 1, and then the detection fixture 2 is rotated 90° relative to the base 1 and then installed on the base 1; then, the first label clamp 24 is controlled to move to the position corresponding to the lowest position information, and the second label clamp 25 is controlled to move to the position corresponding to the highest position information; if the reference feature is located between the position corresponding to the lowest position information and the position corresponding to the highest position information, the label 5 is located within the appearance deviation standard in the current detection direction and meets the requirements; if the reference feature is not located between the position corresponding to the lowest position information and the position corresponding to the highest position information, the label 5 is located outside the appearance deviation standard in the current detection direction and does not meet the requirements, and the installation position of the label paper in the label printing device needs to be adjusted.

[0123] In this specific embodiment, only one set of marking slide rails 22, first label clamping plate 24, and second label clamping plate 25 is provided to realize the inspection of the label 5 in different directions, which has a simple structure and low cost.

[0124] On the basis of the above embodiment, in order to avoid repeated disassembly of the detection fixture 2, the slide rail mounting seat 21 may also include a mounting base, and the first mounting seat 211 may be rotatably arranged on the mounting base. In order to avoid the label slot 11 in the middle position of the base 1, a peripheral rotation mechanism may be provided, and the peripheral edge of the first mounting seat 211 is connected to the peripheral edge of the base 1 through a connecting rod 232 mechanism. The connecting rod 232 mechanism includes a plurality of first connecting rods 232 and a plurality of second connecting rods 232. One end of the first connecting rod 232 is hingedly connected to the peripheral edge of the base 1, and the other end of the first connecting rod 232 is hingedly connected to one end of the second connecting rod 232. The other end of the second connecting rod 232 is rotatably connected to the peripheral edge of the first mounting seat 211. During the rotation of the first mounting seat 211 relative to the base 1, the angle between the first connecting rod 232 and the second connecting rod 232 will change.

[0125] Specifically, a first guide sleeve may be provided on the base 1, and a second guide sleeve may be provided on the side of the first mounting seat 211 facing the base 1, and the first guide sleeve cooperates with the second guide sleeve to limit the rotation of the first mounting seat 211 relative to the base 1. It should be noted that the diameters of the first guide sleeve and the second guide sleeve are both larger than the size of the label slot 11 to avoid affecting the observation of the label 5.

[0126] During actual use, when it is necessary to inspect the length direction of the label 5, the first mounting seat 211 is controlled to rotate relative to the base 1 to an angular position that meets the requirements. At this time, the axial direction of the marking guide is along the length direction of the label 5, and the first label clamp 24 is controlled to move to the position corresponding to the lowest position information, and the second label clamp 25 is controlled to move to the position corresponding to the highest position information; if the reference feature is located between the position corresponding to the lowest position information and the position corresponding to the highest position information, the label 5 is located within the appearance deviation standard in the current detection direction and meets the requirements; if the reference feature is not located between the position corresponding to the lowest position information and the position corresponding to the highest position information, the label 5 is located outside the appearance deviation standard in the current detection direction and does not meet the requirements, and the label paper needs to be installed in the label printing device. The position is adjusted; when it is necessary to inspect the width direction of the label 5, the first mounting seat 211 is controlled to rotate relative to the base 1 to an angular position that meets the requirements. At this time, the axial direction of the marking guide is along the width direction of the label 5, and the first label clamp 24 is controlled to move to the position corresponding to the lowest position information, and the second label clamp 25 is controlled to move to the position corresponding to the highest position information; if the reference feature is located between the position corresponding to the lowest position information and the position corresponding to the highest position information, the label 5 is located within the appearance deviation standard in the current detection direction and meets the requirements; if the reference feature is not located between the position corresponding to the lowest position information and the position corresponding to the highest position information, the label 5 is located outside the appearance deviation standard in the current detection direction and does not meet the requirements, and the installation position of the label paper in the label printing device needs to be adjusted.

[0127] In this specific embodiment, by setting the first mounting plate as a rotatable structure relative to the base 1, in actual use, only one set of marking slide rails 22, a first label clamp 24, and a second label clamp 25 is required to realize inspection of the label 5 in different directions. The structure is simple and the cost is low. The operation process is simple and the repeated disassembly and assembly process is avoided. The inspection quality and efficiency of the label 5 can be effectively improved.

[0128] In addition to the above-mentioned label inspection device, the present invention further provides a label inspection system including a label printing device, a host computer and any of the above-mentioned disclosed label inspection devices, wherein the label printing device is connected to the host computer.

[0129] In this specific embodiment, the host computer can be a control computer connected to the data of the label printing device. The control computer can obtain the coordinate values ​​of the reference features when the required printing is met. Of course, the host computer can also be connected to the label inspection device. The host computer is used to control the sliding of the slider connector 23 relative to the marking slide rail 22 and the display of the display mechanism 31, etc. The specific details are determined according to the actual situation and will not be elaborated here.

[0130] In addition to the above-mentioned label inspection system, the present invention also discloses a label inspection method applied to the above-mentioned label inspection system, and the label inspection method includes:

[0131] Step S1, obtaining the appearance deviation standard corresponding to the label 5 to be detected;

[0132] In the above step S1, the appearance deviation standard of the label 5 is preset. For example, if the deviation standard is 1 mm, then the deviation within ±1 mm meets the requirement.

[0133] Step S2, selecting a reference feature of the tag 5 according to an offset standard;

[0134] like Fig. 20 As shown, the relatively obvious label separation line 51 in the label 5 can be used as a reference feature. Of course, the reference feature can also be selected from other parts of the label 5, which is determined according to actual conditions and will not be elaborated here.

[0135] Step S3, obtaining the position information corresponding to the reference feature;

[0136] In step S3, the position information corresponding to the reference feature can be obtained by the label printing device, or by a host computer connected to the label printing device, which is determined according to actual conditions and will not be elaborated here.

[0137] Step S4, obtaining the lowest position information and the highest position information of the reference feature according to the position information;

[0138] Step S5, controlling the first label clamping plate 24 to move to a position corresponding to the lowest position information, and controlling the second label clamping plate 25 to move to a position corresponding to the highest position information;

[0139] For example, if the position information corresponding to the reference feature is 30 mm and the offset standard is 1 mm, then the position corresponding to the highest position information is 31 mm and the position corresponding to the lowest position information is 29 mm.

[0140] Step S6, determine whether the reference feature is located between the position corresponding to the lowest position information and the position corresponding to the highest position information. If so, the label 5 is within the appearance deviation standard in the current detection direction; if so, the label 5 is outside the appearance deviation standard in the current detection direction.

[0141] After step S6, the method further includes:

[0142] Step S7, controlling the first label clamping plate 24 to move in a direction smaller than the position corresponding to the lowest position information, and controlling the second label clamping plate 25 to move in a direction larger than the position corresponding to the highest position information, until the reference feature is located within the position range between the first label clamping plate 24 and the second label clamping plate 25;

[0143] Step S8, obtaining current position information corresponding to the current reference feature;

[0144] Step S9, obtaining the offset position information of the reference feature according to the current position information, the lowest position information, and the highest position information;

[0145] Step S10: adjusting the installation position of the label paper in the label printing device according to the offset position information.

[0146] For example, if the label 5 is outside the appearance deviation standard in the current detection direction in step S6, the first label clamp 24 is controlled to move in a direction less than 29 mm, and the second label clamp 25 is controlled to move in a direction greater than 31 mm, until the reference feature is located in the position range between the first label clamp 24 and the second label clamp 25. If the current position information corresponding to the reference feature is 35 mm, compared with the standard 30 mm, the reference feature is offset by 5 mm, and the offset direction is greater than the standard position by 5 mm. According to the offset position information, the installation position of the printing paper in the label printing device is adjusted.

[0147] It should also be noted that, in this specification, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises", or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements that are inherent to such process, method, article, or device.

[0148] The label inspection device, label inspection system and label inspection method provided by the present invention are introduced in detail above. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can be referenced to each other. For the system disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A label inspection device, characterized in that: include: A base (1) provided with a label slot (11) for placing a label (5) to be detected; A detection jig (2) is fixedly mounted on the base (1), and the detection jig (2) is provided with a marking slide rail (22), a first label clamping plate (24) and a second label clamping plate (25), and the first label clamping plate (24) and the second label clamping plate (25) are both slidably arranged along the marking slide rail (22); A marking mechanism (3) installed on the detection fixture (2), the marking mechanism (3) being used to mark position information of the first label clamping plate (24) and the second label clamping plate (25) on the marking slide rail (22); An upper cover mechanism (4) is arranged on the upper surface of the detection fixture (2), and the upper cover mechanism (4) is provided with an observation window (44) for observing the position of the label (5) in the label slot (11).

2. The label inspection device according to claim 1, characterized in that: The detection fixture (2) comprises: A slide rail mounting seat (21) provided with a positioning groove for fixing the marking slide rail (22); The marking slide rail (22) is mounted in a positioning groove of the slide rail mounting seat (21) to limit axial movement of the marking slide rail (22); At least two groups of slider connectors (23) are mounted on the marking slide rail (22) and are slidably arranged along the marking slide rail (22); the first label clamping plate (24) is mounted on one group of the slider connectors (23), and the second label clamping plate (25) is mounted on the other group of the slider connectors (23); The marking mechanism (3) comprises a position mark (32) arranged on the marking slide rail (22), and the position mark (32) is used to display axial position information of the first label clamping plate (24) and the second label clamping plate (25) on the marking slide rail (22).

3. The label inspection device according to claim 2, characterized in that: The marking mechanism (3) further comprises: A display mechanism (31) is arranged on the slide rail mounting seat (21), and the display mechanism (31) is used to display position information of the first label clamping plate (24) and the second label clamping plate (25) on the marking slide rail (22); A transmission mechanism comprises a rotating member, a conversion component transmission-connected to the rotating member, a linear encoder (33) connected to the rotating member, and a first controller; the conversion component is used to convert the movement of the slider connector (23) into the rotation of the rotating member, the linear encoder (33) is used to obtain the rotation information of the rotating member and transmit the rotation information to the first controller, the first controller obtains the position information of the slider connector (23) according to the rotation information, transmits the position information to the display mechanism (31), and controls the display mechanism (31) to display the position information.

4. The label inspection device according to claim 3, characterized in that: The detection fixture (2) further comprises a camera, the camera being used to obtain image information of the first label clamp (24), the second label clamp (25) and the label (5), and to send the image information to the first controller; the first controller obtains position image information of the label (5) based on the image information, and sends the position image information to the display mechanism (31), thereby controlling the display mechanism (31) to display the position image information.

5. The label inspection device according to claim 3, characterized in that: The slider connector (23) is provided with a pull rod (231), and the pull rod (231) extends out of the upper cover mechanism (4); or, the detection fixture (2) further comprises a power member for driving the slider connector (23) to move along the marking slide rail (22), and the power member is connected to the first controller so as to control the start and stop of the power member through the first controller; The conversion assembly comprises a rack arranged on the slider connector (23), and the rotating member is a gear meshing with the rack for transmission; The slide rail mounting seat (21) comprises a first mounting seat (211) arranged at the lower side of the marking slide rail (22) and a second mounting seat (212) arranged at the upper side of the marking slide rail (22); the positioning groove comprises a first recessed portion (2114) arranged at the first mounting seat (211) and a second recessed portion (2124) mounted at the second mounting seat (212); The upper cover mechanism (4) is detachably mounted on the upper surface of the slide rail mounting seat (21); the upper cover mechanism (4) is provided with a slide groove (41) extending along the moving direction of the pull rod (231); the pull rod (231) passes through the slide groove (41) and extends out of the upper cover mechanism (4); The slide groove (41) includes a first branch slide groove and a second branch slide groove that are arranged opposite to each other, and the first branch slide groove is parallel to the second branch slide groove; or, the slide groove (41) includes a first branch slide groove, a second branch slide groove, a third branch slide groove and a fourth branch slide groove, the first branch slide groove is parallel to the second branch slide groove, the third branch slide groove is parallel to the fourth branch slide groove, and the distance between the first branch slide groove and the second branch slide groove is equal to the distance between the third branch slide groove and the fourth branch slide groove; or, the slide groove (41) is a square ring structure; The upper cover mechanism (4) is provided with a handle (42) for easy transfer; the side surface of the slide rail mounting seat (21) is provided with a handle (2125) for easy transfer; The base (1) is provided with a slot communicating with the label slot (11), and at least one side of the label slot (11) is provided with the slot to facilitate taking and placing the label (5).

6. The label inspection device according to any one of claims 2 to 5, characterized in that: The label inspection device also includes a third label clamping plate and a fourth label clamping plate; The slide rail mounting seat (21) comprises a first positioning groove, a second positioning groove, a third positioning groove and a fourth positioning groove, wherein the third positioning groove and the fourth positioning groove are arranged at a height higher than the first positioning groove and the second positioning groove; The marking slide rail (22) comprises a first marking slide rail and a second marking slide rail, the first marking slide rail is installed in the first positioning groove and the second positioning groove, the second marking slide rail is installed in the third positioning groove and the fourth positioning groove, the second marking slide rail is mounted on the upper part of the first marking slide rail, and the axial direction of the first marking slide rail is perpendicular to the axial direction of the second marking slide rail; The slider connector (23) comprises a first slider connector, a second slider connector, a third slider connector and a fourth slider connector; the first slider connector and the second slider connector are slidably arranged on the first marking slide rail; the first label clamp (24) is installed on the first slider connector; the second label clamp (25) is installed on the second slider connector; the third slider connector and the fourth slider connector are slidably arranged on the second marking slide rail; the third label clamp is installed on the third slider connector; and the fourth label clamp is installed on the fourth slider connector.

7. The label inspection device according to any one of claims 2 to 5, characterized in that: The slide rail mounting seat (21) comprises a fifth positioning groove, a sixth positioning groove, a seventh positioning groove and an eighth positioning groove; the fifth positioning groove, the sixth positioning groove, the seventh positioning groove and the eighth positioning groove are arranged on four sides of the same square; One of the base (1) and the slide rail mounting seat (21) is provided with four positioning recesses (14), and the other is provided with four positioning protrusions (2111) that are plugged into and cooperate with the four positioning recesses (14). The four positioning recesses (14) are arranged at four angles in the same positive direction, so that the slide rail mounting seat (21) can be mounted on the base (1) after being rotated 90 degrees relative to the base (1).

8. A label inspection system, characterized in that: It comprises the label inspection device according to any one of claims 1 to 7, a label printing device and a host computer, wherein the label printing device is connected to the host computer.

9. A label inspection method, characterized in that: Applied to the label inspection system of claim 8, the label inspection method comprises: Obtaining the appearance deviation standard corresponding to the label to be detected (5); Selecting a reference feature of the tag (5) according to the offset standard; Acquiring position information corresponding to the reference feature; Obtaining the lowest position information and the highest position information of the reference feature according to the position information; Controlling the first label clamping plate (24) to move to a position corresponding to the lowest position information, and controlling the second label clamping plate (25) to move to a position corresponding to the highest position information; It is determined whether the reference feature is located between the position corresponding to the lowest position information and the position corresponding to the highest position information; if so, the label (5) is located within the appearance deviation standard in the current detection direction; if so, the label (5) is located outside the appearance deviation standard in the current detection direction.

10. The label inspection method according to claim 9, characterized in that: The tag (5) further includes, after the current detection direction is outside the appearance deviation standard: Controlling the first label clamping plate (24) to move in a direction smaller than a position corresponding to the lowest position information, and controlling the second label clamping plate (25) to move in a direction larger than a position corresponding to the highest position information, until the reference feature is located within a position range between the first label clamping plate (24) and the second label clamping plate (25); Obtaining current position information corresponding to the current reference feature; Obtaining offset position information of the reference feature according to the current position information, the lowest position information, and the highest position information; The installation position of the label paper in the label printing device is adjusted according to the offset position information.

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