Paper box double-sided labeling mechanism and method thereof

Abstract

The invention discloses a paper box double-sided labeling mechanism and method, and the paper box double-sided labeling mechanism comprises a conveying device and a labeling mechanism, and further comprises a reversing mechanism; the conveying device is used for feeding paper boxes and outputting the paper boxes; the conveying device comprises a left conveying line and a right conveying line which are arranged in parallel, labeling mechanisms are erected on the left conveying line and the right conveying line which are arranged in parallel, and meanwhile a reversing mechanism is arranged on one set of the left conveying line and the right conveying line. The labeling mechanism is used for stripping a single label from a base material and pasting the label on a paper box by using a coiled self-adhesive label; the reversing mechanism is used for turning over the paper box with the label pasted on one side; according to the full-automatic paper box production line, a plurality of working procedures such as paper box conveying, double-face labeling, overturning and pressing are integrated into a complete automatic production line; through cooperative work of the two parallel conveying lines and the reversing mechanism, automatic circulation and 180-degree overturning of a paper box between stations are achieved, the mode that manual intervention is needed for overturning of the paper box after traditional single-face labeling is thoroughly changed, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of packaging equipment, specifically to a double-sided labeling mechanism and method for paper boxes. Background Technology

[0002] In cardboard box packaging design, the front and back are usually designed as the main display surfaces, but they often carry different information and have different purposes. Therefore, different labels are needed to achieve more effective communication and functional zoning.

[0003] Front Label: Core Information and Brand Appeal. The front is the first area consumers encounter, and its label design focuses on attracting attention, conveying core information, and shaping the brand image. It typically includes the brand logo, main visual image, and key certification marks. The back is more often used to carry supplementary, explanatory, or legally mandated information, which is more detailed but has a lower visual priority. Examples include product ingredients, net weight, gross weight, production date, shelf life, barcode, and batch number.

[0004] For example, patent CN222808453U discloses a paper box labeling, coding, and inspection integrated machine, including a frame. A cantilever control box is provided on one side of the frame. A conveyor belt assembly is installed inside the frame. A synchronous lifting belt assembly is provided on the top of the conveyor belt assembly. The frame contains a labeling mechanism, an ultraviolet laser machine, a visual inspection mechanism, and a rejection mechanism. The ultraviolet laser machine and the visual inspection mechanism are located between the labeling mechanism and the rejection mechanism. A steering stop is provided on one side of the conveyor belt assembly for turning the labeled paper box.

[0005] The aforementioned patent integrates cardboard box labeling, coding, and inspection. The equipment is uniformly controlled by a cantilever control box, which can improve production efficiency and reduce product loss during equipment docking. However, the disadvantage of the aforementioned patent is that the labeling mechanism in the aforementioned patent can only perform labeling operations on one side of the cardboard box.

[0006] Therefore, it is necessary to improve such a structure to overcome the above-mentioned defects. Summary of the Invention

[0007] The purpose of this invention is to provide a double-sided labeling mechanism and method for paper boxes to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A paper box double-sided labeling mechanism includes a conveying device and a labeling mechanism, and also includes a reversing mechanism;

[0010] The conveying device is used for feeding and outputting paper boxes; the conveying device includes two parallel left and right conveying lines, each of which is equipped with a labeling mechanism, and one of the left and right conveying lines is equipped with a reversing mechanism.

[0011] The labeling mechanism uses rolls of self-adhesive labels to peel individual labels from the substrate and paste them onto the cardboard box. Since labels need to be pasted on both the top and bottom surfaces of the cardboard box in this solution, the labeling mechanism is provided in two sets, one for pasting two different types of labels.

[0012] The reversing mechanism is used to flip the cardboard box with one side labeled.

[0013] Furthermore, the left and right conveyor lines include a first conveyor line bracket and a first conveyor motor; a first conveyor driven roller and a second conveyor driven roller are rotatably connected to the left and right ends of the first conveyor line bracket, respectively; a first conveyor transmission roller is also rotatably arranged inside the lower part of the conveyor line bracket; two first conveyor belts are connected to the first conveyor driven roller, the second conveyor driven roller and the first conveyor transmission roller; a first conveyor tension roller is also rotatably arranged on the left and right sides above the first conveyor transmission roller, and the first conveyor tension roller is rotatably sleeved on the roller shaft; the two ends of the roller shaft of the first conveyor transmission roller are rotatably connected to the first conveyor mounting plate through bearings; the first conveyor motor is fixedly installed at the bottom of the first conveyor line bracket, and the first conveyor motor is connected to the first conveyor transmission roller through a chain transmission mechanism.

[0014] Furthermore, a first support plate is provided below the first conveyor belt, and the first support plate is fixedly installed on the inner side of the first conveyor support. The first support plate is used to support the first conveyor belt and prevent the middle section of the first conveyor belt from sagging due to gravity. A second support plate is also provided between the two first support plates, and the second support plate is also fixedly installed on the inner side of the first conveyor support. In this solution, the top height of the second support plate can be slightly lower than the height of the first support plate. This setting is mainly used to reduce friction between the bottom of the carton and the second support plate.

[0015] Furthermore, each of the two left and right conveyor lines has a liftable front and rear conveyor line on its inner left side. Each front and rear conveyor line includes a second conveyor line support, a second conveyor motor, and a second lifting support. A third and a fourth driven conveyor roller are rotatably mounted at the front and rear ends of the second conveyor line support, respectively, and two second conveyor belts are connected between the third and fourth driven conveyor rollers. The second conveyor motor is fixedly mounted inside the second motor support, which is fixedly mounted at the bottom right side of the second conveyor line support. The second conveyor motor drives the fourth driven conveyor roller via a first synchronous belt transmission mechanism. The second lifting support is fixedly mounted at the bottom of the first conveyor line support, and a second lifting guide shaft is fixedly mounted downwards at each of the four bottom corners of the second conveyor line support. The second lifting guide shaft is slidably connected to the second lifting support via linear bearings, which are fixedly mounted at the four top corners of the second lifting support. A second lifting cylinder is also fixedly mounted at the top center of the second lifting support, and the output shaft of the second lifting cylinder is fixedly connected to the bottom center of the second conveyor line support.

[0016] Furthermore, the conveying device also includes a transition conveyor line connected between the two left and right conveyor lines; the transition conveyor line includes a conveyor chute with an open top and a smooth surface, which is connected between the two left and right conveyor lines. The paper boxes output from the front and rear conveyor lines enter the conveyor chute and are then received by the front and rear conveyor lines in another left and right conveyor line.

[0017] Furthermore, the labeling mechanism includes a labeling frame, a roll mounting roller, a substrate take-up roller, two sets of traction modules, several guide rollers, a peeling plate, and a labeling execution structure. One side of the labeling frame is fixedly mounted on the top of the first conveyor support via a column. The roll mounting roller and the substrate take-up roller are both rotatably mounted on one side of the labeling frame via bearings. The label roll is mounted on the roll mounting roller. The substrate with the label is drawn out from the label roll and passes through some guide rollers and one set of traction modules in sequence before entering the peeling plate. The label is peeled off at the front edge of the peeling plate. At this time, the substrate with the peeled label passes through some guide rollers and another set of traction modules before entering the substrate take-up roller to be wound up. The front end of the peeling plate is provided with an acute-angled edge. When the substrate with the label passes the front end of the peeling plate, it turns sharply. Since the label is stiffer than the substrate, the label separates from the substrate at the edge of the peeling plate and extends forward. Then it is grasped by the labeling execution structure.

[0018] The labeling execution structure includes an execution frame, which is fixedly installed on the top of the first conveyor support. A slide rail is provided along the front-to-back direction on the inner side of the execution frame, and a gripping moving frame is slidably mounted on the slide rail. A gripping moving motor is fixedly installed on the top of the gripping moving frame, and a gripping moving gear is fixedly installed on the output shaft of the gripping moving motor. A gripping moving rack is also provided along the front-to-back direction on the top of the execution frame. The gripping moving gear and the gripping moving rack mesh with each other. The rotation of the gripping moving motor drives the moving gear to rotate, thereby moving the gripping moving frame back and forth along the slide rail. A labeling lifting cylinder is also fixedly installed on one side of the gripping moving frame. A vacuum suction head is fixedly installed on the output of the labeling lifting cylinder. The vacuum suction head is connected to a vacuum generator via a hose. The vacuum generator generates negative pressure between the bottom of the vacuum suction head and the label, thereby adsorbing the label.

[0019] Furthermore, the reversing mechanism includes a primary reversing mechanism and a secondary gripping mechanism; both the primary reversing mechanism and the secondary gripping mechanism are installed on the top of the first conveyor support; the primary reversing mechanism includes a primary reversing bracket and a primary reversing motor; a primary reversing shaft is rotatably mounted on the top of the primary reversing bracket, the output shaft of the primary reversing motor drives and connects to the primary reversing shaft, a primary gripping bracket is fixedly mounted on the primary reversing shaft, and several second vacuum suction cups are fixedly mounted on the primary gripping bracket; the secondary gripping mechanism includes a secondary gripping bracket and a secondary moving bracket; a secondary moving bracket is slidably mounted on the top of the secondary gripping bracket via a slide rail, a secondary moving cylinder is fixedly mounted on the top left end of the secondary gripping bracket, the secondary moving cylinder drives and connects to the secondary moving bracket so that the secondary moving bracket can move along the slide rail; a secondary lifting cylinder is vertically fixedly mounted on the top of the secondary moving bracket, a secondary gripping bracket is fixedly mounted on the bottom of the output shaft of the secondary lifting cylinder, and several third vacuum suction cups are fixedly mounted on the secondary gripping bracket.

[0020] Furthermore, it also includes two sets of labeling mechanisms, located after the two labeling mechanisms respectively, used for pressing and affixing the labels twice; one set of labeling mechanisms is located at the top of the transition conveyor line, where it not only presses the labels but also serves as a transition and conveyor for the cartons between the two sets of front and rear conveyor lines; the other set of labeling mechanisms is located at the end of the rear left and right conveyor lines; each labeling mechanism includes a labeling mounting bracket and a labeling motor; one side of the labeling mounting bracket is rotatably mounted with an active labeling wheel and several free labeling wheels; a labeling belt, made of rubber, is driven and connected to the active and free labeling wheels; the labeling motor is fixedly mounted on the other side of the labeling mounting bracket, and the labeling motor drives the active labeling wheel; an auxiliary labeling plate is also provided on one side of the labeling mounting bracket, and the labeling belt passes under the auxiliary labeling plate.

[0021] A method for double-sided labeling of cardboard boxes includes the following steps:

[0022] Step 1: Paper box feeding. The paper box is fed into the first left and right conveyor lines in front of the mechanism by external conveying equipment or manually. The first conveyor motor drives the first conveyor belt through chain drive to convey the paper box to the left.

[0023] Step 2: First labeling. The cardboard box moves on the left and right conveyor lines to the bottom of the first labeling mechanism. The labeling mechanism outputs a label, the labeling execution structure picks up the label and presses it onto the upper surface of the cardboard box.

[0024] Step 3: The cardboard box moves to the left and is positioned above the front and rear conveyor lines of the first left and right conveyor line. It stops when the cardboard box contacts the second cardboard box stop plate. The front and rear conveyor lines rise to lift the cardboard box, and the second conveyor motor starts, driving the cardboard box backward via the second conveyor belt.

[0025] Meanwhile, in this step, as the cardboard box passes through the transition conveyor line, the labeling belt of the labeling mechanism rolls the label to ensure it adheres firmly.

[0026] Step 4: After the previous step, when the cardboard box enters another left and right conveyor line, it is received by the front and rear conveyor lines on the left and right conveyor lines; then the reversing mechanism flips the cardboard box, and the left and right conveyor lines drive the cardboard box to move to the right.

[0027] Step 5: Second labeling. The cardboard box moves on the left and right conveyor lines to the bottom of the first labeling mechanism. The labeling mechanism outputs a label, the labeling execution structure picks up the label, and presses another label onto the top surface of the cardboard box.

[0028] Simultaneously, after this step, another set of labeling mechanisms uses a labeling belt to roll the label to ensure it adheres firmly.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] This equipment integrates multiple processes such as cardboard box conveying, double-sided labeling, flipping, and pressing into a complete automated production line. Through the coordinated work of two parallel conveyor lines and a reversing mechanism, it achieves automatic flow and 180-degree flipping of cardboard boxes between workstations, completely changing the traditional mode of manually flipping cardboard boxes after single-sided labeling. This significantly improves production efficiency.

[0031] This invention achieves a complex double-sided labeling process within a limited space by arranging two sets of conveyor lines in parallel and connecting them with a compact reversing mechanism and transition chute. The equipment layout is compact and saves factory floor space. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of a double-sided labeling mechanism for paper boxes.

[0033] Figure 2 This is a front view of a double-sided labeling mechanism for paper boxes.

[0034] Figure 3 This is a side view of a double-sided labeling mechanism for paper boxes.

[0035] Figure 4 This is a top view of a double-sided labeling mechanism for paper boxes.

[0036] Figure 5 This is a schematic diagram of the left and right conveyor lines in a double-sided labeling mechanism for paper boxes.

[0037] Figure 6 This is a front view of the left and right conveyor lines in a double-sided labeling mechanism for paper boxes.

[0038] Figure 7 This is a side view of the left and right conveyor lines in a double-sided labeling mechanism for paper boxes.

[0039] Figure 8 for Figure 6 Sectional view along the AA direction

[0040] Figure 9 for Figure 7 Sectional view along the middle BB direction

[0041] Figure 10 for Figure 5 A magnified view of a portion of point a.

[0042] Figure 11 This is a schematic diagram of the front and rear conveyor lines in a double-sided labeling mechanism for paper boxes.

[0043] Figure 12 This is a schematic diagram of the transition conveyor line in a double-sided labeling mechanism for paper boxes.

[0044] Figure 13 This is a schematic diagram of the labeling mechanism in a double-sided labeling mechanism for paper boxes.

[0045] Figure 14 This is a schematic diagram of the labeling mechanism from another angle in a double-sided labeling mechanism for paper boxes.

[0046] Figure 15 This is a schematic diagram of the traction module in a double-sided labeling mechanism for paper boxes.

[0047] Figure 16 This is a schematic diagram of the peeling plate in a double-sided labeling mechanism for paper boxes.

[0048] Figure 17 This is a schematic diagram of the vacuum adsorption head in a double-sided labeling mechanism for paper boxes.

[0049] Figure 18 This is a schematic diagram of the reversing mechanism in a double-sided labeling mechanism for paper boxes.

[0050] Figure 19 This is a schematic diagram of the label pressing mechanism in a double-sided labeling mechanism for paper boxes (the structure of the label pressing mounting bracket has been removed in this figure to facilitate the explanation of the label pressing mechanism). Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0052] Please see Figure 1-19 A paper box double-sided labeling mechanism and method, comprising a conveying device 100 and a labeling mechanism 200, and further comprising a reversing mechanism 300;

[0053] The conveying device 100 is used for feeding and outputting paper boxes;

[0054] The labeling mechanism 200 uses rolls of self-adhesive labels to peel individual labels from the substrate and paste them onto the cardboard box. Since labels need to be pasted on both the top and bottom surfaces of the cardboard box in this solution, the labeling mechanism 200 is provided with two sets, one for pasting two different types of labels.

[0055] The reversing mechanism 300 is used to flip the cardboard box with one side labeled.

[0056] In this scheme, the conveying device 100 includes two parallel left and right conveying lines 110, and a labeling mechanism 200 is mounted on each of the two parallel left and right conveying lines 110. At the same time, a reversing mechanism 300 is mounted on one of the left and right conveying lines 110.

[0057] The left and right conveyor lines 110 include a first conveyor line bracket 111 and a first conveyor motor 120; the left and right ends of the first conveyor line bracket 111 are respectively rotatably connected to a first conveyor driven roller 112 and a second conveyor driven roller 113, and a first conveyor transmission roller 114 is rotatably arranged inside the lower part of the conveyor line bracket 110; two first conveyor belts 115 are connected between the first conveyor driven roller 112, the second conveyor driven roller 113 and the first conveyor transmission roller 114.

[0058] In this design, first conveying tension rollers 116 are rotatably mounted on the left and right sides above the first conveying drive roller 114, and the first conveying tension rollers 116 are rotatably sleeved on the roller shaft; the two ends of the roller shaft of the first conveying drive roller 114 are rotatably connected to the first conveying mounting plate 117 through bearings.

[0059] Meanwhile, the first conveying mounting plate 117 is also provided with two waist holes 118. The first conveying tension roller 116 is rotatably sleeved on its roller shaft via bearings. The roller shaft can be slidably disposed within the waist holes 118 (to prevent the roller shaft from rotating within the waist holes 118, such as...). Figure X As shown, in this scheme, the end of the roller shaft is square-headed, and the end of the roller shaft is also threaded with a locking screw 119. When the locking screw 119 is tightened, the locking screw 119 is in close contact with the surface of the first conveying mounting plate 117. Relying on the friction between the locking screw 119 and the surface of the first conveying mounting plate 117, the roller shaft of the first conveying tension roller 116 is prevented from displacing relative to the waist hole 118.

[0060] The first conveyor motor 120 is fixedly installed at the bottom of the first conveyor support 111, and the first conveyor motor 120 is connected to the first conveyor drive roller 114 through the chain drive mechanism 121;

[0061] In this scheme, the chain drive mechanism 121 includes a drive sprocket fixedly mounted on the output shaft of the first conveying motor 120 and a driven sprocket fixedly mounted on the roller shaft of the first conveying drive roller 114, and also includes a chain that drives between the drive sprocket and the driven sprocket.

[0062] In this solution, a first support plate 122 is also provided below the first conveyor belt 115. The first support plate 122 is fixedly installed on the inner side of the first conveyor support 111. The first support plate 122 is used to support the first conveyor belt 115 and prevent the middle section of the first conveyor belt 115 from sagging due to gravity.

[0063] In this design, a second support plate 123 is also provided between the two first support plates 122. The second support plate 123 is also fixedly installed on the inner side of the first conveyor support 111. In this design, the top height of the second support plate 123 can be slightly lower than the height of the first support plate 122. This arrangement is mainly used to reduce friction between the bottom of the carton and the second support plate 123.

[0064] In the design, each of the two left and right conveyor lines 110 has a liftable front and rear conveyor line 130 on its inner left side; correspondingly, the second support plate 123 has a first notch 124 at the left and right conveyor lines 110.

[0065] The front and rear conveyor lines 130 include a second conveyor support 131, a second conveyor motor 135, and a second lifting support 138. A third conveyor driven roller 132 and a fourth conveyor driven roller 133 are rotatably mounted at the front and rear ends of the second conveyor support 131, respectively. Two second conveyor belts 134 are connected between the third conveyor driven roller 132 and the fourth conveyor driven roller 133. The second conveyor motor 135 is fixedly mounted on the inner side of the second motor support 136, and the second motor support 136 is fixedly mounted on the bottom right side of the second conveyor support 131. The second conveyor motor 135 is driven and connected to the fourth conveyor driven roller 133 through a first synchronous belt transmission mechanism 137.

[0066] The second lifting bracket 138 is fixedly installed at the bottom of the first conveyor support 111. At the same time, the second lifting guide shaft 139 is fixedly installed downward at the four corners of the bottom of the second conveyor support 131. The second lifting guide shaft 139 is slidably connected to the second lifting bracket 138 through linear bearings. The linear bearings are fixedly installed at the four corners of the top of the second lifting bracket 138.

[0067] A second lifting cylinder 140 is also fixedly installed at the top center of the second lifting bracket 138, and the output shaft of the second lifting cylinder 140 is fixedly connected to the bottom center of the second conveyor bracket 131.

[0068] In this scheme, the distance between the third conveying driven roller 132 and the fourth conveying driven roller 133 should be less than the distance between the two first support plates 122, so that the first support plates 122 will not obstruct the rise of the front and rear conveyor lines 130. After the front and rear conveyor lines 130 rise, the second conveyor belt 134 can lift the paper box on the first conveyor belt 115, so that the paper box is removed from the first conveyor belt 115.

[0069] When the second lifting cylinder 140 is in the retracted state and the conveyor line is at a lower "initial height", when the cardboard box moves above the second conveyor belt 134, the output shaft (piston rod) of the second lifting cylinder 140 is smoothly pushed out, pushing the second conveyor line bracket 131 to rise vertically along the four second lifting guide shafts 139; the second conveyor motor 135 drives the second conveyor belt 134 to move, and at this time the cardboard box on the second conveyor belt 134 is moved back and forth.

[0070] Meanwhile, in this solution, in order to prevent the cardboard box from moving to the left after crossing the front and rear conveyor lines 130, a second cardboard box blocking plate 141 is also fixedly installed on the left side of the first notch 124 on the second support plate 123; when the cardboard box contacts the second cardboard box blocking plate 141, the cardboard box is blocked by the second cardboard box blocking plate 141 and stops moving to the left.

[0071] In this scheme, the conveying device 100 further includes a transition conveying line 150, which is connected between the two left and right conveying lines 110.

[0072] The transition conveyor line 150 includes a conveyor chute 151 with an open top and a smooth surface. The conveyor chute 151 is connected between two left and right conveyor lines 110. The paper boxes output from the front and rear conveyor lines 130 enter the conveyor chute 151 and are then received by the front and rear conveyor lines 130 in the other left and right conveyor lines 110.

[0073] The labeling mechanism 200 includes a labeling frame 201, a material roll mounting roller 202, a substrate winding roller 203, two sets of traction modules 204, several guide rollers 205, a peeling plate 206, and a labeling execution structure 207.

[0074] One side of the labeling machine frame 201 is fixedly installed on the top of the first conveyor support 111 by a column. The material roll mounting roller 202 and the substrate take-up roller 203 are both rotatably installed on one side of the labeling machine frame 201 by bearings. The label roll with the label is installed on the material roll mounting roller 202. The substrate with the label is drawn out from the label roll and passes through a partial guide roller 205 and a set of traction modules 204 in sequence to enter the peeling plate 206. The label is peeled off at the front edge of the peeling plate 206. At this time, the substrate with the label peeled off passes through a partial guide roller 205 and another set of traction modules 204 to enter the substrate take-up roller 203 and be wound up.

[0075] The labeling execution structure 207 attracts and grasps individual labels at the front end of the peeling plate 206, and then affixes the labels to the carton.

[0076] The front end of the peeling plate 206 is provided with an acute-angled edge; the substrate with the label turns sharply when it passes the front end of the peeling plate 206, and the label, because it is more rigid than the substrate, separates from the substrate at the edge of the peeling plate and extends forward; then it is picked up by the labeling execution structure 207.

[0077] Specifically, in this solution, the traction module 204 includes a traction module frame 2041, a traction power roller 2042, and a traction pressure roller 2043.

[0078] The traction module frame 2041 is fixedly installed on one side of the labeling machine frame 201. At the same time, the traction power roller 2042 is rotatably installed inside the traction module frame 2041. The traction pressure roller 2043 is rotatably installed on one end of the pressure roller mounting frame 2044. The pressure roller mounting frame 2044 is horizontally slidably installed inside the traction module frame 2041. At the same time, a first spring 2045 is provided between the inner side of the traction module frame 2041 and the pressure roller mounting frame 2044 to keep the traction pressure roller 2043 and the traction power roller 2042 in close contact, thereby increasing the friction between the substrate and the traction power roller 2042 passing between the traction pressure roller 2043 and the traction power roller 2042, and preventing the traction power roller 2042 from "slipping" relative to the substrate.

[0079] In this design, the rear end of the peeling plate 206 is fixedly mounted on the output shaft at the front end of the double-rod cylinder 2061. The double-rod cylinder 2061 can drive the peeling plate 206 to move back and forth, thereby facilitating the peeling plate 206 to actively peel the label from the substrate. At the same time, in order to maintain the balance of the substrate during the transmission of the labeling mechanism 200, a set of guide rollers 205 are also rotatably mounted on the output shaft at the rear end of the double-rod cylinder 2061. The substrate with the label being peeled off passes through the guide rollers 205. When the peeling plate 206 moves forward, the guide rollers 205 also move forward, thereby effectively offsetting the tension change of the substrate caused by the movement of the peeling plate and ensuring the tension balance of the substrate throughout the label feeding process.

[0080] In this solution, a labeling drive motor 208 is also fixedly installed on one side of the labeling frame 201. The roller shafts of the traction power rollers 2042 of the two sets of traction modules 204, the roller shafts of the substrate winding rollers 203, and the output shaft of the drive motor 208 all pass through the labeling frame 201. These roller shafts and the output shaft are connected by a second synchronous belt drive mechanism 209. The labeling drive motor 208 can drive the traction power rollers 2042 and the substrate winding rollers 203 to rotate synchronously through the second synchronous belt drive mechanism 209.

[0081] Specifically, the second synchronous belt drive mechanism 209 includes a synchronous pulley mounted on the roller shaft of the traction power roller 2042, the roller shaft of the substrate winding roller 203, the output shaft of the drive motor 208, and a synchronous belt that drives between the synchronous pulleys.

[0082] In this solution, the labeling execution structure 207 includes an execution frame 2071, which is fixedly installed on the top of the first conveyor support 111. A slide rail is provided on the inner side of the execution frame 2071 along the front-back direction. A gripping moving frame 2072 is slidably arranged on the slide rail. A gripping moving motor 2073 is fixedly installed on the top of the gripping moving frame 2072. A gripping moving gear 2074 is fixedly installed on the output shaft of the gripping moving motor 2073. A gripping moving rack 2075 is also provided on the top of the execution frame 2071 along the front-back direction. The gripping moving gear 2074 and the gripping moving rack 2075 mesh with each other. By rotating the gripping moving motor 2073, the moving gear 2074 is driven to rotate, which in turn drives the gripping moving frame 2072 to move back and forth along the slide rail.

[0083] A labeling lifting cylinder 2076 is also fixedly installed on one side of the gripping moving frame 2072. A vacuum adsorption head 2077 is fixedly installed on the output of the labeling lifting cylinder 2076. The vacuum adsorption head 2077 is connected to a vacuum generator (not shown in the figure) through a hose. The vacuum generator (e.g., a pneumatic vacuum pump) generates a negative pressure between the bottom of the vacuum adsorption head 2077 and the label, thereby adsorbing the label.

[0084] When this solution is used, the labeling execution structure 207 attracts the label at the front end of the peeling plate 206, and then the gripping moving motor 2073 drives the vacuum suction head 2077 to continue moving forward. Then the labeling lifting cylinder 2076 drives the vacuum suction head 2077 to descend and contact the carton, so that the label on the vacuum suction head 2077 contacts the carton. Then the vacuum suction head 2077 releases the label, and the label is pasted on the carton.

[0085] It is worth noting that in this solution, the vacuum suction head 2077 includes a vacuum suction cup bracket 2078 and a plurality of first vacuum suction cups 2079 installed in the vacuum suction cup bracket 2078.

[0086] The reversing mechanism 300 includes a primary reversing mechanism 310 and a secondary gripping mechanism 320; both the primary reversing mechanism 310 and the secondary gripping mechanism 320 are installed on the top of the first conveyor support 111.

[0087] The primary reversing mechanism 310 includes a primary reversing bracket 311 and a primary reversing motor 312; a primary reversing shaft 313 is rotatably mounted on the top of the primary reversing bracket 311, the output shaft of the primary reversing motor 312 drives and connects to the primary reversing shaft 313, a primary gripping bracket 314 is fixedly mounted on the primary reversing shaft 313, and several second vacuum suction cups 315 are fixedly mounted on the primary gripping bracket 314;

[0088] The secondary gripping mechanism 320 includes a secondary gripping bracket 321 and a secondary moving bracket 322; the secondary moving bracket 322 is slidably mounted on the top of the secondary gripping bracket 321 via a slide rail, and a secondary moving cylinder 323 is fixedly mounted on the top left end of the secondary gripping bracket 321. The secondary moving cylinder 323 drives the secondary moving bracket 322 so that the secondary moving bracket 322 can move along the slide rail.

[0089] A secondary lifting cylinder 324 is vertically fixedly installed on the top of the secondary moving support 322. A secondary gripping support 325 is fixedly installed at the bottom of the output shaft of the secondary lifting cylinder 324. Several third vacuum suction cups 326 are fixedly installed on the secondary gripping support 325.

[0090] When the commutation mechanism 300 is in use,

[0091] First, the first-stage reversing motor 312 starts, driving the first-stage reversing shaft 313 and the first-stage gripping bracket 314 fixed thereon to rotate to the left, so that the second vacuum suction cup 315 installed thereon contacts the carton and completes the adsorption; then the first-stage reversing motor 312 reverses, causing the carton to flip to the right.

[0092] Then, the secondary moving cylinder 323 actuates, pushing the secondary moving bracket 322 to move to the left along the slide rail, so that the third vacuum suction cup 326 installed at its end reaches directly above the carton; the secondary lifting cylinder 324 pushes the secondary gripping bracket 325 down, the third vacuum suction cup 326 picks up the carton, and the second vacuum suction cup 315 releases; the secondary moving cylinder 323 actuates, causing the carton to move to the right, and then the secondary moving cylinder 323 continues to cause the carton to descend, the third vacuum suction cup 326 releases, and the carton falls into the left and right conveyor lines 110.

[0093] The primary reversing mechanism completes a wide range of angle changes, while the secondary gripping mechanism is responsible for precise positioning and gripping. Together, they achieve the flipping and transfer of the carton.

[0094] In this solution, two sets of label pressing mechanisms 400 are also provided. The two sets of label pressing mechanisms 400 are located in the subsequent process of the two sets of labeling mechanisms 200, and are used to press and adhere the labels twice.

[0095] One set of label pressing mechanisms 400 is located at the top of the transition conveyor line 150. At this time, the label pressing mechanism 400 can not only press the label, but also play the role of transitioning and conveying the carton between the two sets of front and rear conveyor lines 130; the other set of label pressing mechanisms 400 is located at the end of the rear left and right conveyor lines 110.

[0096] The label pressing mechanism 400 includes a label pressing mounting bracket 401 and a label pressing motor 405; a driving label pressing wheel 402 and several free label pressing wheels 403 are rotatably mounted on one side of the label pressing mounting bracket 401; a label pressing belt 404 made of rubber is driven and connected to the driving label pressing wheel 402 and the free label pressing wheels 403; the label pressing belt 404 is fixedly mounted on the other side of the label pressing mounting bracket 401, and the label pressing motor 405 drives the driving label pressing wheel 402.

[0097] An auxiliary label-pressing plate 406 is also provided on one side of the label-pressing mounting bracket 401, and the label-pressing belt 404 passes under the auxiliary label-pressing plate 406.

[0098] When using this invention, step 1: paper box feeding. The paper box is fed into the first left and right conveyor line 110 in front of the mechanism by external conveying equipment or manual feeding. The first conveyor motor 120 drives the first conveyor belt 115 through chain transmission to convey the paper box to the left.

[0099] Step 2: First labeling. The cardboard box moves on the left and right conveyor lines 110 to the bottom of the first labeling mechanism 200. The labeling mechanism 200 outputs a label, and the labeling execution structure 207 picks up the label and presses it onto the upper surface of the cardboard box.

[0100] Step 3: The cardboard box moves to the left to the area above the front and rear conveyor lines 130 of the first left and right conveyor line 110. When the cardboard box contacts the second cardboard box blocking plate 141, it stops. The front and rear conveyor lines 130 rise to lift the cardboard box, and the second conveyor motor 135 starts, driving the cardboard box to move backward through the second conveyor belt 134.

[0101] Meanwhile, in this step, when the cardboard box passes through the transition conveyor line 150, the label pressing belt 404 of the label pressing mechanism 400 rolls the label to ensure it is firmly attached.

[0102] Step 4: When the cardboard box enters another left and right conveyor line 110 after passing through the previous step, it is received by the front and rear conveyor lines 130 on the left and right conveyor line 110; then the reversing mechanism 300 flips the cardboard box, and the left and right conveyor line 110 drives the cardboard box to move to the right.

[0103] Step 5: Second labeling. The cardboard box moves on the left and right conveyor lines 110 to below the first labeling mechanism 200. The labeling mechanism 200 outputs a label, and the labeling execution structure 207 picks up the label and presses another label onto the upper surface of the cardboard box.

[0104] Simultaneously, after this step, another labeling mechanism 400 uses a labeling belt 404 to roll the label to ensure it adheres firmly.

[0105] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connect" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

Claims

1. A carton double-sided labelling mechanism comprising a conveying device and a labelling mechanism, characterised in that, The reversing mechanism is further included; The conveying device is used for feeding and outputting cartons; the conveying device comprises two parallel left and right conveying lines, the two parallel left and right conveying lines are provided with the labeling mechanism, and one set of left and right conveying lines is provided with the reversing mechanism; The labeling mechanism uses a roll of adhesive labels, peels off single labels from a base material and pastes the labels on cartons; labels need to be pasted on upper and lower surfaces of the cartons; therefore, the labeling mechanism is provided with two sets of labeling mechanisms for pasting two different labels. The reversing mechanism is used for turning over the cartons with one side of the labels pasted.

2. A double-sided labelling mechanism for cartons according to claim 1, characterised in that, The left and right conveying lines comprise a first conveying line support and a first conveying motor; the left and right ends of the first conveying line support are rotationally connected with a first conveying driven roller and a second conveying driven roller, and a first conveying transmission roller is further rotationally arranged at the lower portion of the conveying line support; the first conveying driven roller, the second conveying driven roller and the first conveying transmission roller are transmissionally connected with two first conveying belts; the left and right sides of the upper portion of the first conveying transmission roller are further rotationally provided with first conveying tensioning rollers, and the first conveying tensioning rollers are rotationally sleeved on roller shafts; the roller shafts of the first conveying transmission roller are rotationally connected with a first conveying mounting plate through bearings, the first conveying motor is fixedly mounted at the bottom of the first conveying line support, and the first conveying motor is transmissionally connected with the first conveying transmission roller through a chain transmission mechanism.

3. A double-sided labelling mechanism for cartons according to claim 2, characterised in that, The lower portion of the first conveying belt is further provided with a first supporting plate, and the first supporting plate is fixedly mounted at the inner side of the first conveying line support; the first supporting plate is used for supporting the first conveying belt to prevent the middle section of the first conveying belt from sagging due to gravity; a second supporting plate is further arranged between the two first supporting plates, and the second supporting plate is also fixedly mounted at the inner side of the first conveying line support; in this scheme, the top of the second supporting plate can be slightly lower than the height of the first supporting plate, and this arrangement is mainly used to reduce the friction between the bottom of the carton and the second supporting plate.

4. A double-sided labelling mechanism for cartons according to claim 3, characterised in that, The inner left sides of the two left and right conveying lines are provided with front and rear conveying lines which can be lifted; the front and rear conveying lines comprise a second conveying line support, a second conveying motor and a second lifting support; the front and rear ends of the second conveying line support are rotationally provided with a third conveying driven roller and a fourth conveying driven roller, and the third conveying driven roller and the fourth conveying driven roller are transmissionally connected with two second conveying belts; the second conveying motor is fixedly mounted at the inner side of the second motor support, the second motor support is fixedly mounted at the right bottom of the second conveying line support, and the second conveying motor is drivingly connected with the fourth conveying driven roller through a first synchronous belt transmission mechanism; the second lifting support is fixedly mounted at the bottom of the first conveying line support, and second lifting guide shafts are fixedly mounted at the bottom corners of the second conveying line support; the second lifting guide shafts are slidingly connected with the second lifting support through linear bearings, and the linear bearings are fixedly mounted at the top corners of the second lifting support; a second lifting cylinder is further fixedly mounted at the top center of the second lifting support, and the output shaft of the second lifting cylinder is fixedly connected at the bottom center of the second conveying line support.

5. A double-sided labelling mechanism for cartons according to claim 4, characterised in that, The conveying device further comprises a transition conveying line connected between the two left and right conveying lines; the transition conveying line comprises a conveying chute with an open top and a smooth surface, which is connected between the two left and right conveying lines; the cartons output from the front and rear conveying lines enter the conveying chute and are then received by the front and rear conveying lines in the other left and right conveying lines.

6. A double-sided labelling mechanism for cartons according to claim 1, characterised in that, The labeling mechanism comprises a labeling frame, a label roll mounting roller, a substrate winding roller, two groups of traction modules, a plurality of guide rollers, a stripping plate and a labeling execution structure; one side of the labeling frame is fixedly installed on the top of the first conveying line support through a stand column, the label roll mounting roller and the substrate winding roller are both rotatably installed on one side of the labeling frame through bearings, the label roll with labels is installed on the label roll mounting roller, the substrate with labels is drawn from the label roll, sequentially passes through part of the guide rollers, one group of traction modules, enters the stripping plate, the labels are stripped at the front end edge of the stripping plate, at this time, the substrate with the stripped labels passes through part of the guide rollers and the other group of traction modules and is wound by the substrate winding roller; the front end of the stripping plate is provided with an acute-angle-shaped edge; the substrate with labels sharply turns when passing through the front end of the stripping plate, and the labels are separated from the substrate at the edge of the stripping plate and protrude forward due to the fact that the labels are stiffer than the substrate; and then are grabbed by the labeling execution structure; the labeling execution structure comprises an execution frame fixedly installed on the top of the first conveying line support, a slide rail is arranged on the inner side of the execution frame in the front and rear directions, a grabbing moving frame is slidably arranged on the slide rail, a grabbing moving motor is fixedly installed on the top of the grabbing moving frame, a grabbing moving gear is fixedly installed on the output shaft of the grabbing moving motor, a grabbing moving rack is further arranged on the top of the execution frame in the front and rear directions, the grabbing moving gear and the grabbing moving rack are in meshing engagement, the grabbing moving frame can move back and forth along the slide rail by rotating the moving gear through the rotation of the grabbing moving motor; a labeling lifting cylinder is further fixedly installed on one side of the grabbing moving frame, a vacuum suction head is fixedly installed on the output of the labeling lifting cylinder, the vacuum suction head is connected with a vacuum generator through a hose, and the vacuum generator generates negative pressure between the bottom of the vacuum suction head and the labels, so as to adsorb the labels.

7. A double-sided labelling mechanism for cartons according to claim 1, characterised in that, The reversing mechanism comprises a primary reversing mechanism and a secondary grabbing mechanism; the primary reversing mechanism and the secondary grabbing mechanism are both installed on the top of the first conveying line support; the primary reversing mechanism comprises a primary reversing support and a primary reversing motor; a primary reversing shaft is rotatably installed on the top of the primary reversing support; the output shaft of the primary reversing motor is drivingly connected with the primary reversing shaft; a primary grabbing support is fixedly installed on the primary reversing shaft; a plurality of second vacuum suction cups are fixedly installed on the primary grabbing support; the secondary grabbing mechanism comprises a secondary grabbing support and a secondary moving support; the secondary moving support is slidingly installed on the top of the secondary grabbing support through a slide rail; a secondary moving cylinder is fixedly installed on the left top of the secondary grabbing support; the secondary moving cylinder is drivingly connected with the secondary moving support so that the secondary moving support can move along the slide rail; a secondary lifting cylinder is vertically fixedly installed on the top of the secondary moving support; the output shaft bottom of the secondary lifting cylinder is fixedly installed with the secondary grabbing support; a plurality of third vacuum suction cups are fixedly installed on the secondary grabbing support.

8. A double-sided labelling mechanism for cartons according to claim 1, characterised in that, Two groups of label pressing mechanisms are further included, which are located in subsequent processes of the two groups of labeling mechanisms respectively and are used for pressing and adhering labels twice; one group of the label pressing mechanisms is located on the top of the transition conveying line, which can not only press labels but also transition and convey cartons between the two front and rear conveying lines; the other group of the label pressing mechanisms is located at the ends of the left and right conveying lines at the rear; the label pressing mechanism comprises a label pressing installation support and a label pressing motor; a driving label pressing wheel and a plurality of free label pressing wheels are rotatably installed on one side of the label pressing installation support; a label pressing belt is drivingly connected with the driving label pressing wheel and the free label pressing wheels; the label pressing belt is made of rubber; the label pressing motor is fixedly installed on the other side of the label pressing installation support and is drivingly connected with the driving label pressing wheel; an auxiliary label pressing plate is further arranged on one side of the label pressing installation support, and the label pressing belt passes below the auxiliary label pressing plate.

9. A method of double-sided labelling cartons, characterized in that The method comprises the following steps: Step 1: paper box feeding; the paper box is sent into the first left and right conveying line in front of the feeding mechanism by external conveying equipment or manually; the first conveying motor drives the first conveying belt through chain transmission to convey the paper box to the left; Step 2: first labeling; the paper box moves to the lower side of the first group of labeling mechanisms on the left and right conveying line; the labeling mechanism outputs labels; the labeling execution structure grabs the labels and presses and adheres the labels to the upper surface of the paper box; Step 3: the paper box moves to the left to the front and rear conveying line above the first left and right conveying line; the paper box stops when contacting the second paper box blocking plate; the front and rear conveying line lifts the paper box; the second conveying motor is started to drive the paper box to move backward through the second conveying belt; At the same time, when the paper box passes through the transition conveying line, the label pressing belt of the label pressing mechanism rolls and presses the labels to ensure that the labels are adhered; Step 4: the paper box enters the other left and right conveying line through the previous step; the front and rear conveying line of the left and right conveying line receives the paper box; the reversing mechanism turns over the paper box; the left and right conveying line drives the paper box to move to the right; Step 5: second labeling, the carton is moved to the first group of labeling mechanism under the left and right conveying line, the labeling mechanism outputs a label, and the labeling execution structure grabs the label and presses another label to the upper surface of the carton; at the same time after this step, the labeling belt of the other group of labeling mechanism rolls the label to ensure that it is attached.

Images