A labeling device

Abstract

The present invention discloses a labeling device, comprising an unwinding roller, which is set at a fixed position, and a label roll can be unwound through the unwinding roller, a label buffer mechanism, a pressure wheel mechanism and a clamping mechanism, wherein the label buffer mechanism is provided with a pre-storage area in the area near the unwinding roller, and a label pre-storage roller group is provided in the pre-storage area, and the label pre-storage roller group is used to pre-store labels in the pre-storage area; the clamping mechanism can slide in the labeling direction of the product, and the clamping mechanism is used to pull out the label in the pre-storage area and pull the label to the top of the product; the pressure wheel mechanism is used to press the label above the product to fit the product. The labeling device can realize continuous labeling operation of the label, and can effectively reduce the resistance during labeling, thereby improving the labeling efficiency.

Description

Technical Field

[0001] The invention relates to the field of automatic labeling, and in particular to a labeling device. Background Art

[0002] In industrial production, many products need to be labeled during production. For example, when a product has defects, the defective product can be distinguished by labeling, which makes it easier to remove the defective product, that is, to eliminate the problematic product, thereby improving product quality.

[0003] However, in the prior art, most of the labels are affixed to the products manually. Generally, a label tape must be prepared first. The label tape has multiple labels arranged along the extension direction of the label tape adhered to the tape. The worker peels the label off the label and affixes it to the product. The labeling efficiency is low and the labor cost is high.

[0004] To this end, the applicant proposed a labeling device, the working principle of which is as follows: a conveying mechanism is used to convey products, and the two ends of the label tape are respectively wound around a winding mechanism and an unwinding mechanism. The winding mechanism winds up the label tape, and when the label tape passes through the wedge-shaped end, the label is peeled off the label tape and is attached to the product passing under the wedge-shaped end. Then the conveying mechanism conveys the labeled product to a color mark sensor for detection. The color mark sensor determines whether the product is labeled by sensing the color of the label. In this way, the automation of product labeling, pressing and detection can be achieved.

[0005] However, when it is necessary to stick a whole continuous label on a product, for example, when sticking a whole label with an adhesive surface on a product, it is difficult to achieve whole-section labeling using the above-mentioned labeling device because the following process steps are followed when sticking a whole continuous label on a product: pulling out the label, pressing the label, and moving the label, etc., that is, it is difficult to achieve continuous labeling operations of the label. In addition, when using the above-mentioned labeling device to stick labels, since the labeling device pulls out the label tape from the label roll when labeling, the resistance is large during labeling, resulting in low labeling efficiency. Summary of the invention

[0006] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a labeling device, which can realize continuous labeling operation of labels and can effectively reduce the resistance during labeling, thereby improving the labeling efficiency.

[0007] The purpose of the present invention is achieved by the following technical solutions:

[0008] A labeling device comprises a unwinding roller, which is mounted at a fixed position, and a label roll can be unwound by the unwinding roller, and also comprises a label buffer mechanism, a pressure wheel mechanism and a clamping mechanism, wherein the label buffer mechanism is provided with a pre-storage area in the area near the unwinding roller, and a label pre-storage roller group is provided in the pre-storage area, and the label pre-storage roller group is used to pre-store labels in the pre-storage area; the clamping mechanism can slide in the labeling direction of the product, and the clamping mechanism is used to pull out the label located in the pre-storage area and pull the label to the top of the product; the pressure wheel mechanism is used to press the label located above the product until it fits the product.

[0009] Furthermore, during the process of the label being pulled out, the amount of labels stored in the pre-storage area gradually decreases. When the amount of labels stored in the pre-storage area reaches a minimum pre-storage value, the label pre-storage roller group restores the amount of labels stored in the pre-storage area to a maximum pre-storage value under the action of external force or gravity.

[0010] Furthermore, the label buffer mechanism further comprises a lifting mechanism, and the lifting mechanism is used to provide the label pre-storage roller group with power to slide in the pre-storage area.

[0011] Furthermore, the label pre-storage roller group includes a plurality of pre-storage rollers, the label buffer mechanism also includes a fixed roller group, the fixed roller group includes a plurality of fixed rollers, and the labels are sequentially staggered and wound between the fixed rollers and the pre-storage rollers.

[0012] Furthermore, the outer wall surface of the fixed roller is used to contact the slippery surface of the label, the outer wall surface of the pre-stored roller is used to contact the adhesive surface of the label, and the outer wall surface of the pre-stored roller is provided with a plurality of grooves, which are arranged at intervals.

[0013] Furthermore, the clamping mechanism has a plane surface for contacting with the slippery surface of the label and an arcuate surface for contacting with the adhesive surface of the label, and the plane matches with the arcuate surface.

[0014] Further, the clamping mechanism is a manipulator, which includes a first clamp, a second clamp and a first cylinder. The first clamp and the second clamp are opposite to each other. The first cylinder is used to connect with the first clamp or the second clamp. The first cylinder is used to drive the first clamp to move in a direction of being in contact with or away from the second clamp, or the first cylinder is used to drive the second clamp to move in a direction of being in contact with or away from the first clamp.

[0015] Furthermore, the plane is arranged on the first clamping plate, and a plurality of bearings are arranged on the second clamping plate. The plurality of bearings are arranged at intervals and the central axes of the plurality of bearings are located on the same horizontal plane, and the outer wall surfaces of the plurality of bearings form the arc surface.

[0016] Furthermore, the labeling device also includes a shearing mechanism for shearing the label.

[0017] Furthermore, the labeling device also includes a pressing plate mechanism, and the pressing plate mechanism is used to clamp and press the label.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The label buffer mechanism, clamping mechanism and pressure wheel mechanism cooperate with each other to handle the problems of label pre-storage, clamping, pulling and label fitting between products, so as to realize the operation of continuous labeling on products and improve labeling efficiency.

[0020] 2. A pre-storage area is provided in the label buffer mechanism, and a label pre-storage roller group is provided in the pre-storage area, which can slide in the pre-storage area and is used to pre-store labels in the pre-storage area. The labels are pre-stored in the pre-storage area under the sliding of the label pre-storage roller group. When labeling, the labels pre-stored in the pre-storage area are pulled out by external force or gravity, so that the labels are pre-stored before labeling, which reduces the resistance of pulling out the labels during labeling, thereby facilitating labeling and improving labeling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a labeling device of the present invention from a first viewing angle;

[0022] Figure 2 It is a structural schematic diagram of the labeling device of the present invention from a second viewing angle.

[0023] In the figure: 1, frame; 2, label buffer mechanism; 21, fixed roller group; 211, first connecting shaft; 212, fixed roller; 22, label pre-storage roller group; 221, second connecting shaft; 222, pre-storage roller; 223, mounting plate; 23, guide mechanism; 231, first slider; 232, first guide rail; 24, lifting mechanism; 241, second slider; 242, guide rod; 3, unwinding roller; 4, clamping mechanism; 41, first cylinder; 42, first A clamping plate; 421, a plane; 43, a second clamping plate; 431, a bearing; 5, a transverse driving mechanism; 51, a third cylinder; 52, a third slider; 53, a second guide rail; 6, a pressure wheel mechanism; 61, a fourth cylinder; 62, a pressure wheel; 7, a shearing mechanism; 71, a knife plate; 72, a fifth cylinder; 73, a support plate; 74, a sixth cylinder; 75, a seventh cylinder; 8, a pressure plate mechanism; 81, a pressure plate; 82, a support plate; 83, an eighth cylinder; 9, a label. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0025] See also Figure 1 to Figure 2 , shows a labeling device, which includes a reel 3, a label buffer mechanism 2, a pressure plate mechanism 8, a shearing mechanism 7, a pressure wheel mechanism 6, a clamping mechanism 4, a transverse driving mechanism 5 and a frame 1, wherein the reel 3, the label buffer mechanism 2, the pressure plate mechanism 8, the shearing mechanism 7, the pressure wheel mechanism 6, the clamping mechanism 4 and the transverse driving mechanism 5 are respectively installed on the frame 1.

[0026] In order to realize the automatic labeling operation of the labeling device, the label buffer mechanism 2, the clamping mechanism 4, the transverse drive mechanism 5, the shearing mechanism 7, and the pressure wheel mechanism 6 should be respectively connected to the central controller and controlled by the central controller. The central controller can be the PLC of the labeling device. Each mechanism operates in conjunction through the conventional predetermined program in the central controller, thereby completing the automatic labeling process of the label 9.

[0027] Among them, the unwinding roller 3 is mounted at a fixed position of the frame 1, and the label 9 roll can be unwound through the unwinding roller 3. It can be understood that the unwinding roller 3 of the labeling device can include a reel and a core shaft, the core shaft is fixed on the frame 1, and the reel is sleeved on the core shaft and can rotate around the core shaft, and the label 9 roll can be unwound through the unwinding roller 3, and the label 9 is released through the unwinding roller 3.

[0028] The label buffer mechanism 2 includes a fixed roller group 21, a label pre-storage roller group 22, a guide mechanism 23 and a lifting mechanism 24, wherein the label buffer mechanism 2 is provided with a pre-storage area in the area near the unwinding roller 3, and the pre-storage area is formed by the fixed roller group 21 and the label pre-storage roller group 22 arranged at intervals, and the label pre-storage roller group 22 can slide in the pre-storage area under the drive of the guide mechanism 23, and the lifting mechanism 24 is used to provide the label pre-storage roller group 22 with power to slide in the pre-storage area, and the label pre-storage roller group 22 is used to pre-store the label 9 in the pre-storage area.

[0029] During the use of the label 9, the storage amount of the label 9 in the pre-storage area gradually decreases. When the storage amount of the label 9 in the pre-storage area reaches the minimum pre-storage value, the label pre-storage roller group 22 restores the pre-storage amount of the label 9 in the pre-storage area to the maximum pre-storage value under the action of external force or its own gravity. It can be understood that in the embodiment of the present invention, the above-mentioned minimum pre-storage value is a certain length of label 9 stored in the pre-storage area. The certain length of label 9 can maintain a certain distance between the label pre-storage roller group 22 and the fixed roller group 21 to ensure that there is no collision between the label pre-storage roller group 22 and the fixed roller group 21, and the maximum pre-storage value can be adaptively adjusted according to the length of the label 9 required for each labeling by the automatic labeling machine.

[0030] The above-mentioned fixed roller group 21 includes multiple fixed rollers 212 and a first connecting shaft 211. The fixed roller 212 is sleeved on the first connecting shaft 211 and can rotate around the first connecting shaft 211. The multiple first connecting shafts 211 are fixed on the frame 1, and the central axes of the multiple first connecting shafts 211 are on the same horizontal plane 421 to form a fixed roller group 21 arranged side by side.

[0031] like Figure 1-Figure 2 As shown, the label pre-storage roller group 22 includes a plurality of pre-storage rollers 222, a plurality of second connecting shafts 221 and a mounting plate 223. The plurality of second connecting shafts 221 are mounted on the mounting plate 223. The plurality of second connecting shafts 221 are arranged at intervals, and the central axes of the plurality of second connecting shafts 221 are located on the same horizontal plane 421 to form a label pre-storage roller group 22 arranged side by side. When pre-storing a label 9, the pulling force of the label 9 is made more uniform, thereby avoiding breaking the label 9. The mounting plate 223 is fixedly connected to the guide mechanism 23, wherein, as shown in FIG. Figure 1 As shown, a pre-storage roller 222 is located between two adjacent fixed rollers 212. In a preferred embodiment of the present invention, the fixed roller group 21 is located above the label pre-storage roller group 22, and the central axis of the fixed roller group 21 arranged side by side is parallel to the central axis of the label pre-storage roller group 22 arranged side by side. Figure 2 As shown, the labels 9 pulled out from the label 9 roll located on the unwinding roller 3 are alternately wound on the fixed roller 212 and the pre-stored roller 222 in sequence, wherein, when continuous labels 9 need to be pasted, the slippery surface (non-adhesive surface) of the label 9 contacts the outer wall surface of the fixed roller 212, while the adhesive surface of the label 9 contacts the outer wall surface of the pre-stored roller 222. In order to facilitate the adhesive surface of the pulled-out end of the label 9 wound around the fixed roller 212 and the pre-stored roller 222 to face the adhesive surface of the product, in a preferred embodiment of the present invention, the number of fixed rollers 212 should be one more than the number of pre-stored rollers 222, for example, Figure 2As shown, there are four fixed rollers 212 and three pre-storage rollers 222, so as to facilitate labeling and ensure that the pulling force on the label 9 is relatively uniform when the label 9 is pre-stored. In the preferred embodiment of the present invention, the central axis of the fixed roller group 21 arranged side by side is parallel to the central axis of the label pre-storage roller group 22 arranged side by side, so as to ensure the uniform pulling force on the label 9, thereby avoiding the phenomenon of breaking the label 9, so as to improve the pulling efficiency and thus improve the automatic labeling efficiency.

[0032] Since the sticky surface of the label 9 is in contact with the outer wall surface of the pre-stored roller 222, in order to better avoid the sticky surface of the label 9 from sticking to the pre-stored roller 222, the outer wall surface of the pre-stored roller 222 (the outer wall surface is the surface in contact with the sticky surface of the label 9) is provided with a plurality of grooves, and the plurality of grooves are evenly spaced apart. Providing grooves on the outer wall surface of the pre-stored roller 222 can reduce the surface area of ​​the outer wall surface of the pre-stored roller 222, thereby reducing the contact area between the sticky surface of the label 9 and the outer wall surface of the pre-stored roller 222, avoiding the sticky surface of the label 9 from sticking to the outer wall surface of the pre-stored roller 222, making the pulling of the label 9 smoother, and thus facilitating labeling.

[0033] In a preferred embodiment of the present invention, the label pre-storage roller group 22 can slide in a direction close to or away from the fixed roller group 21. When the label pre-storage roller group 22 slides into place in a direction away from the fixed roller group 21 under the action of external force or its own gravity, the area between the label pre-storage roller group 22 and the fixed roller group 21 is the pre-storage area. During labeling, under the external force provided by other auxiliary mechanisms of the automatic labeling machine or manual pulling, the label pre-storage roller group 22 slides in a direction close to the fixed roller group 21.

[0034] like Figure 1 As shown, in order to ensure that the label pre-storage roller group 22 can reach the required position, a first guide rail 232 in the required direction is pre-set in the pre-storage area, and the first guide rail 232 is fixed on the frame 1. The above-mentioned guide mechanism 23 is a first slider 231, and the first slider 231 slides with the first guide rail 232, and the label pre-storage roller group 22 is fixedly connected to the first slider 231, so as to facilitate the sliding of the label pre-storage roller group 22 in the pre-storage area, thereby realizing the pre-storage of labels 9.

[0035] The above-mentioned lifting mechanism 24 is specifically used to provide the label pre-storage roller group 22 with power to make a directional downward sliding on the first guide rail 232. The lifting mechanism 24 has a state for abutting with the label pre-storage roller group 22 and a state for disengaging from the label pre-storage roller group 22. Specifically, the lifting mechanism 24 includes a second cylinder, a second slider 241 and a guide rod 242. The guide rod 242 and the second cylinder are all fixed on the frame 1. The second slider 241 slides with the guide rod 242. The piston rod of the second cylinder is fixedly connected to the second slider 241. The second slider 241 is detachably abutted with the label pre-storage roller group 22. When the label pre-storage roller group 22 drops into place, the pre-storage of the label 9 is completed, and the second cylinder drives the second slider 241 to reset. At this time, the second slider 241 is separated from the label pre-storage roller group 22. When labeling, the label pre-storage roller group 22 is driven to rise under the pull of external force, so as to realize labeling using the label 9 in the pre-storage area.

[0036] Of course, the lifting mechanism 24 can also use a gear rack mechanism or a screw mechanism or other mechanisms that can achieve linear motion.

[0037] The clamping mechanism 4 can slide in the labeling direction of the product, and is used to pull out the label 9 in the pre-stored area and pull the label 9 to the top of the product. The clamping mechanism 4 is a manipulator, which has an open state for the label 9 to be inserted and a clamping state for clamping the label 9, so as to achieve the clamping of the label 9 by the clamping mechanism 4 and prepare for the clamping mechanism 4 to pull out the label 9.

[0038] Specifically, the manipulator includes a first clamping plate 42, a second clamping plate 43 and a first cylinder 41. The first clamping plate 42 and the second clamping plate 43 are opposite to each other. The first cylinder 41 is used to connect with the first clamping plate 42 or the second clamping plate 43. The first cylinder 41 is used to drive the first clamping plate 42 to move in a direction of being attached to or away from the second clamping plate 43, or the first cylinder 41 is used to drive the second clamping plate 43 to move in a direction of being attached to or away from the first clamping plate 42. In a preferred embodiment of the present invention, the first clamping plate 42 is located above the second clamping plate 43. The first clamping plate 42 is used to contact the slippery surface of the label 9, and the second clamping plate 43 is used to contact the adhesive surface of the label 9. When the first cylinder 41 is connected to the first clamping plate 42, the first cylinder 41 drives the first clamping plate 42 to move in a direction away from the second clamping plate 43, and a gap is formed between the first clamping plate 42 and the second clamping plate 43 for the label 9 to pass through. When the first cylinder 41 drives the first clamping plate 42 and the second clamping plate 43 to fit together, the first clamping plate 42 and the second clamping plate 43 clamp the label 9, thereby realizing the clamping of the label 9 by the clamping mechanism 4.

[0039] Since the surface of the label 9 in contact with the second clamping plate 43 is a sticky surface, in order to avoid the sticky surface of the label 9 from sticking to the second clamping plate 43 and interrupting the automatic labeling process, the first clamping plate 42 has a plane 421 for contacting the label 9, and the second clamping plate 43 has an arcuate surface for contacting the label 9. The first clamping plate 42 is provided with a plane 421 in contact with the label 9. The plane 421 is combined with the second clamping plate 43 to clamp the label 9, and the arcuate surface in contact with the label 9 is provided on the second clamping plate 43, so that the contact between the second clamping plate 43 and the sticky surface of the label 9 can be line contact, thereby reducing the contact area with the sticky surface of the label 9, thereby avoiding the sticky surface of the label 9 from sticking to the second clamping plate 43, making the pulling of the label 9 smoother, thereby ensuring the normal operation of the automatic labeling.

[0040] As a preferred embodiment of the present invention, a plurality of bearings 431 are provided on the second clamping plate 43, the outer wall surfaces of the plurality of bearings 431 form an arc-shaped surface, the plurality of bearings 431 are arranged at intervals and the central axes of the plurality of bearings 431 are located on the same horizontal plane 421, thereby further reducing the contact area between the second clamping plate 43 and the label 9.

[0041] The transverse driving mechanism 5 is used to drive the clamping mechanism 4 to slide in the labeling direction of the product. The transverse driving mechanism 5 includes a third slider 52 and a third cylinder 51. In order to ensure that the clamping mechanism 4 can reach the required position, a second guide rail 53 in the required direction will be pre-set on the frame 1. The second guide rail 53 is fixed on the frame 1, and the third slider 52 is fixedly connected to the third cylinder 51, and the third slider 52 is slidably matched with the second guide rail 53, and the piston rod of the third cylinder 51 is connected to the third slider 52. The third cylinder 51 is used to drive the clamping mechanism 4 to move along the labeling direction of the product, so as to provide the clamping mechanism 4 with a pulling force for the label 9.

[0042] The pressing wheel mechanism 6 is used to press the label 9 located above the product until it fits the product. The pressing wheel mechanism 6 includes a pressing wheel 62 and a fourth cylinder 61. The piston rod of the fourth cylinder 61 is connected to the pressing wheel 62 and is used to drive the pressing wheel 62 to rise and fall. The pressing wheel 62 is made of rubber or plastic material, and the length of the pressing wheel 62 should be larger than the width of the label 9.

[0043] The shearing mechanism 7 is used to cut the label 9. The shearing mechanism 7 includes a moving blade assembly and a stationary blade assembly that act in coordination with each other, wherein the moving blade assembly includes a knife plate 71 and a fifth cylinder 72 connected to the knife plate 71, and the stationary blade assembly includes a supporting plate 73 and a sixth cylinder 74 connected to the supporting plate 73. The knife plate 71 is opposite to the supporting plate 73. The fifth cylinder 72 is used to drive the knife plate 71 to fit with the supporting plate 73 or to disengage from the supporting plate 73, and the sixth cylinder 74 is used to drive the supporting plate 73 to fit with the knife plate 71 or to disengage from the knife plate 71. When the fifth cylinder 72 drives the knife plate 71 to disengage from the supporting plate 73, the sixth cylinder 74 drives the supporting plate 73 to disengage from the knife plate 71 to allow the label 9 to pass through. When the fifth cylinder 72 drives the knife plate 71 to fit with the supporting plate 73, the sixth cylinder 74 drives the supporting plate 73 to fit with the knife plate 71 to cut the label 9. Preferably, the blade 71 is provided with an inclined surface a, and the support plate 73 is provided with an inclined surface b matched with the inclined surface a, so as to facilitate the cutting of the label 9. In the preferred embodiment of the present invention, it also includes a seventh cylinder 75 for driving the movable blade assembly to move laterally along the travel direction of the frame 1. The seventh cylinder 75 is connected to the movable blade assembly. By moving the movable blade assembly laterally, better cutting of the label 9 can be achieved. While cutting, the movable blade assembly is driven laterally by the seventh cylinder 75 to ensure that the cross section of the label 9 is a plane 421 or a relatively flat surface, thereby facilitating the clamping mechanism 4 to clamp the label 9 during the next automatic labeling.

[0044] When the shearing mechanism 7 is used to cut the label 9, the pressing plate mechanism 8 is used to clamp and press the label 9 to facilitate the cutting of the label 9. The pressing plate mechanism 8 includes a pressing plate 81, a supporting plate 82 and an eighth cylinder 83. The piston rod of the eighth cylinder 83 is fixedly connected to the pressing plate 81, the supporting plate 82 is fixedly connected to the frame 1, the supporting plate 82 and the pressing plate 81 are opposite to each other, and the supporting plate 82 is located below the pressing plate 81. When the supporting plate 82 is away from the pressing plate 81, a gap is formed between the supporting plate 82 and the pressing plate 81 for the label 9 to pass through. When the second cylinder is reset, the eighth cylinder 83 drives the pressing plate 81 to move in the direction of fitting the supporting plate 82 to achieve pressing and clamping the pull-out end of the label 9 that is staggered around the fixed roller 212 and the pre-stored roller 222 in sequence to clamp the label 9, so that the shearing mechanism 7 is convenient for cutting the label 9.

[0045] The working principle of the labeling device is as follows: manually pre-install the label 9 onto the unwinding roller 3 and alternately wind the label 9 around the fixed roller group 21 and the label pre-storage roller group 22 in sequence, and then pre-clamp the label 9 head onto the clamping mechanism 4. After starting, the lifting mechanism 24 pushes the label pre-storage roller group 22 downward, so that the label pre-storage roller group 22 pulls the label 9 unwound by the unwinding roller 3 into the pre-storage area to realize the pre-storage of the label 9. Then the lifting mechanism 24 is reset to release the contact with the label pre-storage roller group 22. During labeling, the central controller receives the labeling instruction, and the label 9 head is pulled to the first side of the product under the moving drive of the clamping mechanism 4. At this time, the label 9 head located at the pre-storage area is The label 9 in the storage area is pulled out by the clamping mechanism 4 for use, and the label pre-storage roller group 22 is lifted up by the pulling of the clamping mechanism 4, and the head of the label 9 is made to fit with the first side of the product through the pressing wheel mechanism 6, and then the clamping mechanism 4 releases the label 9, and the pressing wheel mechanism 6 descends to press the label 9. The labeling device can move along the direction from the first side of the product to the second side of the product (the labeling direction of the product) under the action of external force until the area formed by the first side to the second side of the product is affixed with the label 9, and finally the pressing plate mechanism 8 presses the label 9, and at the same time drives the shearing mechanism 7 to cut the label 9, and buffers and stores the label 9 again to prepare for the next labeling.

[0046] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A labeling device, comprising a reel, the reel being mounted at a fixed position, through which a label roll can be unwound, characterized in that: It also includes a label buffer mechanism, a pressing wheel mechanism and a clamping mechanism, wherein the label buffer mechanism is provided with a pre-storage area in the area near the unwinding roller, and the pre-storage area is provided with a label pre-storage roller group, and the label pre-storage roller group is used to pre-store labels in the pre-storage area; the clamping mechanism can slide in the labeling direction of the product, and the clamping mechanism is used to pull out the label in the pre-storage area and pull the label to the top of the product; the pressing wheel mechanism is used to press the label above the product to fit the product; During the process of the label being pulled out, the amount of labels stored in the pre-storage area gradually decreases. When the amount of labels stored in the pre-storage area reaches a minimum pre-storage value, the label pre-storage roller group restores the amount of labels stored in the pre-storage area to a maximum pre-storage value under the action of external force or gravity; The label buffer mechanism further comprises a lifting mechanism, the lifting mechanism is used to provide the label pre-storage roller group with power to slide in the pre-storage area, the lifting mechanism has a state for abutting against the label pre-storage roller group and a state for disengaging from the abutment with the label pre-storage roller group; The label pre-storage roller group includes a plurality of pre-storage rollers, the label buffer mechanism also includes a fixed roller group, the fixed roller group includes a plurality of fixed rollers, and the labels are sequentially staggered and wound between the fixed rollers and the pre-storage rollers; The outer wall surface of the fixed roller is used to contact the slippery surface of the label, and the outer wall surface of the pre-stored roller is used to contact the adhesive surface of the label. The outer wall surface of the pre-stored roller is provided with a plurality of grooves, and the plurality of grooves are arranged at intervals.

2. The labeling device according to claim 1, characterized in that: The clamping mechanism has a plane surface for contacting with the sliding surface of the label and an arc surface for contacting with the adhesive surface of the label, and the plane matches with the arc surface.

3. The labeling device according to claim 2, characterized in that: The clamping mechanism is a manipulator, which includes a first clamp, a second clamp and a first cylinder. The first clamp and the second clamp are opposite to each other. The first cylinder is used to connect with the first clamp or the second clamp. The first cylinder is used to drive the first clamp to move in a direction of being in contact with or away from the second clamp, or the first cylinder is used to drive the second clamp to move in a direction of being in contact with or away from the first clamp.

4. The labeling device according to claim 3, characterized in that: The plane is arranged on the first clamping plate, and a plurality of bearings are arranged on the second clamping plate. The plurality of bearings are arranged at intervals and the central axes of the plurality of bearings are located on the same horizontal plane. The outer wall surfaces of the plurality of bearings form the arc surface.

5. The labeling device according to claim 1, characterized in that: The labeling device also includes a shearing mechanism for shearing the label.

6. The labeling device according to claim 1, characterized in that: The labeling device also includes a pressing plate mechanism, which is used to clamp and press the label.

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