Multi-head labelling device

Abstract

The application provides a multi-head labeling device, which comprises a positioning conveying mechanism and at least two labeling mechanisms, and the positioning conveying mechanism is provided with a device for adsorbing and fixing workpieces; the labeling mechanism comprises a fixed base, a lifting adjusting assembly, a transverse adjusting assembly, a mounting plate, a unwinding assembly, a winding assembly, a brake assembly, a pressing assembly, a stripping plate and a plurality of guide rollers; the lifting adjusting assembly and the transverse adjusting assembly respectively adjust the position of the mounting plate in the vertical direction and the transverse direction; the unwinding assembly and the winding assembly are respectively arranged on the upper and lower parts of the first side of the mounting plate; the stripping plate is arranged on the lower part of the second side of the mounting plate and extends downward and forward to the conveying surface in an inclined manner; the brake assembly is arranged on one side of the unwinding assembly; the pressing assembly is arranged between the stripping plate and the winding assembly, and in the direction of the label tape, the brake assembly and the pressing assembly are respectively arranged on the front and rear ends of the stripping plate. The application not only has high working efficiency, but also the label tape will not loosen when the labeling is paused.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of labeling equipment, in particular to a multi-head labeling device with high labeling efficiency. BACKGROUND

[0002] Before the environmental protection wooden electronic label card is made, the electronic label needs to be pasted on the wood piece with large volume. The existing labeling device comprises a unwinding assembly, a winding assembly, a label stripping plate and a plurality of guide rollers. The two ends of the label tape are connected to the unwinding assembly and the winding assembly respectively, the middle part of the label tape is wound outside the guide rollers, and the part to be pasted of the label tape is arranged on the label stripping plate. When the label tape passes through the label stripping plate, the electronic label on the label tape will be automatically stripped from the base paper and pasted on the wood piece. When multiple electronic labels need to be pasted on the wood piece, the labeling device needs to paste them one by one according to the arrangement, and the wood piece is previously positioned on a platform, and the transverse and longitudinal movement of the labeling part of the labeling device is used to realize multi-row labeling, which has low working efficiency. Moreover, when the existing labeling device is paused, the unwinding assembly has inertia to continue rotating, which causes the label tape to loosen, resulting in the phenomenon that the subsequent labeling of the labeling device is not smooth, or the labeling position is not accurate enough. SUMMARY

[0003] The purpose of the present application is to provide a multi-head labeling device with high working efficiency and without loosening of the label tape.

[0004] In order to achieve the above purpose, the multi-head labeling device provided by the present application comprises a positioning conveying mechanism and at least two labeling mechanisms. The two labeling mechanisms are arranged along the conveying direction of the positioning conveying mechanism. The labeling part of the labeling mechanism is arranged above the positioning conveying mechanism, and in the conveying direction of the positioning conveying mechanism, the labeling parts of the two labeling mechanisms are arranged in a staggered manner. A device for adsorbing and fixing the workpiece is arranged on the positioning conveying mechanism. The labeling mechanism comprises a fixed base, a lifting adjusting assembly, a transverse adjusting assembly, a mounting plate, a unwinding assembly, a winding assembly, a brake assembly, a pressing assembly, a stripping plate and a plurality of guide rollers. The lifting adjusting assembly, the transverse adjusting assembly and the mounting plate are arranged on the fixed base. The lifting adjusting assembly can adjust the position of the mounting plate in the vertical direction, and the transverse adjusting assembly can adjust the position of the mounting plate in the transverse direction. The unwinding assembly is arranged on the upper part of the first side of the mounting plate, the winding assembly is arranged on the lower part of the first side of the mounting plate, the stripping plate is arranged on the lower part of the second side of the mounting plate and extends downward and forward to the conveying surface of the positioning conveying mechanism in an inclined manner, the plurality of guide rollers are arranged on the mounting plate in the direction of feeding the label tape, the brake assembly is arranged on one side of the unwinding assembly, and the pressing assembly is arranged between the stripping plate and the winding assembly, and in the direction of feeding the label tape, the brake assembly and the pressing assembly are arranged on the front and rear ends of the stripping plate respectively.

[0005] From the above scheme can be seen, by setting the positioning conveying mechanism, for a fixed wood while conveying wood; by setting at least two labeling mechanism, wood from the conveying process at the same time at least two label pasting operation, with the advantage of high work efficiency; by setting the brake assembly and compression assembly respectively at the front and rear ends of the label strip direction of the stripping plate, for clamping the label strip, to ensure that the label strip is always in tension state at the front and rear ends of the stripping plate, prevent loose, especially prevent when the labeling mechanism pause, due to the inertia of the unwinding assembly and lead to the label strip loose, conducive to ensure the smooth progress of the labeling operation, reduce the failure rate, the label strip is always in tension state is also conducive to ensure the accuracy of the labeling position.

[0006] Further scheme is, the brake assembly includes a fixed rod, a mounting rod and a brake spring, the mounting rod is arranged on one side of the fixed rod, the first end of the brake spring is connected to the mounting rod, the second end of the brake spring extends to the fixed rod and abuts with the peripheral wall of the fixed rod, the second end of the brake spring and the peripheral wall of the fixed rod form a gap for the label strip to pass through.

[0007] From the above scheme can be seen, by setting the brake spring and the fixed rod cooperate, for clamping the label strip passing through the brake spring and the fixed rod, because the brake spring has elasticity, will not affect the normal label strip operation, when the labeling mechanism is temporarily, under the action of the brake spring, the label strip is compressed in the fixed rod peripheral wall, prevent the label strip loose.

[0008] Further scheme is, the compression assembly includes a compression mounting frame, a power roller and two movable compression subgroups, the power roller is rotatably arranged on the middle part of the compression mounting frame, and the two movable compression subgroups are arranged on the left and right sides of the power roller; the movable compression subgroup includes a rotating shaft, a movable compression roller and two mounting members, the two mounting members are arranged at the two ends of the rotating shaft, the end of the rotating shaft passes through the first end of the mounting member and is connected with the compression mounting frame, the movable compression roller is connected between the second ends of the two mounting members, and the movable compression roller can rotate around the rotating shaft, the movable compression roller abuts with the power roller, and the distance from the surface of the movable compression roller to the surface of the power roller is adjustable.

[0009] From the above scheme can be seen, the label strip passes between the movable compression roller and the power roller, by setting two movable compression subgroups, it is convenient to adjust the distance from the surface of the movable compression roller to the surface of the power roller, so that the label strip at this part receives greater friction, and the brake spring cooperates to ensure that the label strip is always in tension state at the front and rear ends of the stripping plate in the label strip direction, avoid loose.

[0010] Further scheme is, in the vertical direction, the two movable compression rollers are arranged on the upper and lower sides of the power roller respectively, and the rotating directions of the two movable compression rollers are opposite.

[0011] Further, the active pressing group further comprises an adjusting member and a locking member, the adjusting member is arranged on the back of the rotating direction of the mounting member and abuts against the mounting member, and the locking member is connected to the pressing mounting frame through the adjusting member, and the height position of the adjusting member in the vertical direction is adjustable.

[0012] According to the above scheme, by arranging the adjusting member and the locking member, the adjusting member acts on the mounting member to push the active pressing roller to rotate, which has the advantage of convenient adjustment.

[0013] Further, the labeling mechanism further comprises a tensioning assembly arranged on one side of the unwinding assembly, and the tensioning assembly comprises a tensioning roller capable of elastically swinging up and down.

[0014] Further, the positioning conveying mechanism comprises a conveying mounting frame, a conveying belt and a conveying driving device, the conveying belt is wound on the outer side of the conveying mounting frame, and the conveying driving device drives the conveying belt to perform a conveying action; the conveying mounting frame is internally provided with a vacuum cavity, a plurality of air suction holes are formed in the top wall of the conveying mounting frame, and a plurality of perforations are formed in the conveying belt and are in communication with the vacuum cavity through the air suction holes.

[0015] According to the above scheme, by arranging the perforations on the conveying belt and communicating the perforations with the vacuum cavity through the air suction holes, the wood pieces are fixed by the vacuum adsorption principle, so that the positions of the wood pieces are fixed during the conveying process, which is beneficial to improve the accuracy of the labeling position.

[0016] Further, the conveying mounting frame comprises an upper frame and a bottom frame, the bottom frame is arranged on the bottom wall of the upper frame, a plurality of vacuum cavities are arranged between the bottom frame and the upper frame, the plurality of vacuum cavities are arranged in the conveying direction, and a partition plate is arranged between adjacent two vacuum cavities.

[0017] According to the above scheme, by arranging a plurality of vacuum cavities, the length and area of a single vacuum cavity can be reduced, and the vacuum adsorption capacity can be ensured; the arrangement of a plurality of vacuum cavities is especially suitable for the positioning conveying mechanism with a long conveying distance.

[0018] Further, a discharging rack is arranged on the first side of the feeding end of the positioning conveying mechanism, a positioning baffle is arranged on the second side of the feeding end of the positioning conveying mechanism, the positioning baffle protrudes from the conveying surface of the conveying belt, and the positioning baffle is arranged opposite to the discharging rack.

[0019] Further, a pressing roller is arranged at the discharging end of the positioning conveying mechanism, the pressing roller is arranged across the two sides of the positioning conveying mechanism in the transverse direction, and the pressing roller has a preset distance between the circumferential wall and the conveying surface of the positioning conveying mechanism.

[0020] According to the above scheme, by arranging the pressing roller, the label is pressed once after labeling to be firmly attached to the wood piece. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a structural diagram of an embodiment of the present application.

[0022] Figure 2 is a structural diagram of a labeling mechanism in an embodiment of the present application.

[0023] Figure 3 is Figure 2 is an enlarged view of A in

[0024] Figure 4 is an exploded view of a pressing assembly in an embodiment of the present application.

[0025] Figure 5 is a side view of a power roller and two movable pressing sub-assemblies in an embodiment of the present application.

[0026] Figure 6 is a structural diagram of a positioning and conveying mechanism in an embodiment of the present application.

[0027] Figure 7 is an exploded view of a positioning and conveying mechanism in an embodiment of the present application.

[0028] The present application is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0029] Referring to Figure 1 , the multi-head labeling device provided by the embodiment includes a mounting base frame 1, a positioning and conveying mechanism 2, and at least two labeling mechanisms 3. The embodiment is described by taking three labeling mechanisms 3 as an example. The positioning and conveying mechanism 2 and the labeling mechanisms 3 are both arranged on the mounting base frame 1. The positioning and conveying mechanism 2 extends in the longitudinal direction, and the three labeling mechanisms 3 are arranged in the conveying direction of the positioning and conveying mechanism 2. The labeling parts of the labeling mechanisms 3 are arranged directly above the positioning and conveying mechanism 2, and the labeling parts of the three labeling mechanisms 3 are arranged in a staggered manner in the conveying direction of the positioning and conveying mechanism 2. After a wood piece 4 is conveyed from the rear end of the positioning and conveying mechanism 2 to the front end of the positioning and conveying mechanism 2, three longitudinal rows of electronic labels are automatically attached to the wood piece 4. The positioning and conveying mechanism 2 is provided with a device for adsorbing and fixing a workpiece, so as to avoid the position of the wood piece 4 from being deviated during the conveying process.

[0030] Referring to Figures 2 to 5The labeling mechanism 3 comprises a fixed base 31, a lifting adjusting assembly 32, a transverse adjusting assembly 33, a mounting plate 34, a unwinding assembly 35, a winding assembly 36, a brake assembly 37, a pressing assembly 38, a stripping plate 39, a tensioning assembly 40 and a plurality of guide rollers, and four guide rollers are taken as an example for description. The lifting adjusting assembly 32, the transverse adjusting assembly 33 and the mounting plate 34 are all arranged on the fixed base 31, and the mounting plate 34 is arranged vertically, the lifting adjusting assembly 32 can adjust the position of the mounting plate 34 in the vertical direction, and the transverse adjusting assembly 33 can adjust the position of the mounting plate 34 in the transverse direction. The lifting adjusting assembly 32 and the transverse adjusting assembly 33 are both common technical means in the art, and the detailed structure is not described herein.

[0031] The unwinding assembly 35 is arranged on the upper portion of the first side of the mounting plate 34, preferably protruding outward of the mounting plate 34. The winding assembly 36 is arranged on the lower portion of the first side of the mounting plate 34, and the stripping plate 39 is arranged on the lower portion of the second side of the mounting plate 34 and extends downward and forward to the conveying surface of the positioning conveying mechanism 2, and here, “forward” refers to the front end of the conveying direction of the positioning conveying mechanism 2. The four guide rollers are arranged on the mounting plate 34 in the direction of the label tape. The first end of the label tape is wound on the unwinding assembly 35, the middle portion of the label tape is wound on the four guide rollers in turn, and the second end of the label tape is wound on the winding assembly 36. The unwinding assembly 35 is driven to rotate, and the winding assembly 36 is provided with a rotary driving device to drive the winding assembly 36 to rotate actively, thereby driving the label tape to move.

[0032] The tensioning assembly 40 is arranged on the side of the unwinding assembly 35 close to the mounting plate 34, and the tensioning assembly 40 comprises a tensioning roller, a mounting bracket, a fixed frame and an elastic member. One end of the mounting bracket is hinged to the fixed frame, the tensioning roller is arranged on the second end of the mounting bracket, the tensioning roller is arranged in parallel with the guide rollers, the elastic member is elastically connected between the fixed frame and the mounting bracket, and the tensioning roller can elastically swing up and down. The label tape drawn out from the unwinding assembly 35 is first wound on the tensioning roller after passing through the first guide roller 41 located on the lower right side of the tensioning roller.

[0033] The brake assembly 37 is arranged on one side of the unwinding assembly 35, specifically between the first guide roller 41 and the tensioning roller, and the label passes through the brake assembly 37 after passing through the tensioning roller. Specifically, the brake assembly 37 comprises a fixing rod 371, a mounting rod 372, a spring mounting seat 373, and a brake spring 374. The mounting rod 372 is arranged on the lower right side of the fixing rod 371, the spring mounting seat 373 is arranged on the mounting rod 372, the first end of the brake spring 374 is connected to the spring mounting seat 373, the second end of the brake spring 374 extends obliquely upwardly to the fixing rod 371, the second end of the brake spring 374 is adjacent to the peripheral wall of the fixing rod 371, and a gap for the label to pass through is formed between the second end of the brake spring 374 and the peripheral wall of the fixing rod 371. The label enters the gap from the upper left and exits from the lower right. Since the brake spring 374 itself has elasticity, the label can smoothly pass through the gap under the driving of the winding assembly 36. When the labeling mechanism 3 is paused, the brake spring 374 presses the label against the peripheral wall of the fixing rod 371, and under the action of no external force, the label will not move back and forth, so as to ensure that the label at the front end of the brake assembly 37 is always in a tensioned state and will not be affected by the inertia unwinding action of the unwinding assembly 35.

[0034] After passing through the brake assembly 37, the label is wound around the outside of the second guide roller 42, the third guide roller 43, and the fourth guide roller 44 in sequence. The fourth guide roller 44 is arranged above the stripping mounting plate, the stripping mounting plate extends obliquely downwardly, the stripping plate 39 is arranged on the stripping mounting plate, and the stripping plate 39 is arranged in parallel with the stripping mounting plate. The labeling mechanism 3 is provided with a detection device between the second guide roller 42 and the third guide roller 43, which is used for detecting the position of the electronic tag on the label, so as to accurately label.

[0035] The pressing assembly 38 is arranged between the stripping plate 39 and the winding assembly 36, and in the direction of the label feeding, the brake assembly 37 and the pressing assembly 38 are arranged on the front and rear ends of the stripping plate 39, respectively. Under the cooperation of the brake assembly 37 and the pressing assembly 38, it is ensured that the label between the brake assembly 37 and the pressing assembly 38 is always in a tensioned state, so as to avoid loosening and be more conducive to labeling operation.

[0036] The pressing assembly 38 comprises a pressing mounting frame 381, a power roller 382, a power driving device (not shown in the figure), and two movable pressing subgroups 383. The power roller 382 is arranged on the middle part of the pressing mounting frame 381, the power driving device drives the power roller 382 to rotate around its own axis, and the rotation direction of the power roller 382 needs to be matched with the feeding direction. The two movable pressing subgroups 383 are arranged on the left and right sides of the power roller 382 respectively. The movable pressing subgroup 383 comprises a rotating shaft 3831, a movable pressing roller 3832, and two mounting pieces 3833. The two mounting pieces 3833 are arranged at the two ends of the rotating shaft 3831 respectively, and the end of the rotating shaft 3831 penetrates through the first end of the mounting piece 3833 and is connected with the pressing mounting frame 381. The movable pressing roller 3832 is connected between the second ends of the two mounting pieces 3833, and can rotate around the rotating shaft 3831. The movable pressing roller 3832 is adjacent to the power roller 382, and the spacing between the surface of the movable pressing roller 3832 and the surface of the power roller 382 is adjustable. The label passes between the two movable pressing rollers 3832 and the power roller 382 in turn.

[0037] In order to conveniently adjust the position of the movable pressing roller 3832 in the horizontal direction, the first end of the mounting piece 3833 is provided with a waist round hole, the length direction of the waist round hole extends along the length direction of the mounting piece 3833, and the end of the rotating shaft 3831 is provided with a connecting column which is inserted into the waist round hole and can be adjusted in position along the length direction of the waist round hole.

[0038] In the vertical direction, the two movable pressing rollers 3832 are arranged on the upper and lower sides of the power roller 382 respectively, that is, the center of one movable pressing roller 3832 is below the horizontal center line of the power roller 382, and the center of the other movable pressing roller 3832 is above the horizontal center line of the power roller 382. The rotation directions of the two movable pressing rollers 3832 are opposite, the closer the center of the movable pressing roller 3832 to the horizontal center line of the power roller 382, the smaller the gap between the movable pressing roller 3832 and the power roller 382, and the more the label can be clamped. In the actual production process, the movement of the label needs to be considered, and the gap cannot be too small or too large.

[0039] The movable pressing subgroup 383 further comprises an adjusting piece 3834 and a locking piece (not shown in the figure). The adjusting piece 3834 is arranged on the back of the rotating direction of the mounting piece 3833 and abuts against the mounting piece 3833. The locking piece penetrates through the adjusting piece 3834 and is connected with the pressing mounting frame 381. The height position of the adjusting piece 3834 in the vertical direction is adjustable. The middle part of the adjusting piece 3834 is provided with a long hole which extends in the upward and downward direction. The adjusting piece 3834 penetrates through the long hole and is connected in the corresponding connecting hole 3835 of the pressing mounting frame 381. The adjusting piece 3834 can be adjusted in position along the extension direction of the long hole, so that the height position of the adjusting piece 3834 is adjustable, and the gap between the movable pressing roller 3832 and the power roller 382 is adjusted.

[0040] Referring to Figure 6 and Figure 7 The positioning conveying mechanism 2 extends longitudinally and comprises a conveying mounting frame 21, a conveying belt 22 wound outside the conveying mounting frame 21, and a conveying driving device 23 driving the conveying belt 22 to convey the wood pieces longitudinally. The conveying mounting frame 21 is internally provided with a vacuum cavity 24, and the top wall of the conveying mounting frame 21 is provided with a plurality of air suction holes 2112 arranged longitudinally and transversely. The conveying belt 22 is provided with a plurality of perforations 221 arranged longitudinally and transversely, and the perforations 221 are communicated with the vacuum cavity 24 through the air suction holes 2112. The wood pieces 4 are adsorbed and fixed by the vacuum adsorption principle without affecting the forward conveying of the wood pieces 4.

[0041] Specifically, the conveying mounting frame 21 comprises an upper frame 211 and a bottom frame 212. The lower part of the upper frame 211 is provided with four supporting feet, and both ends of the upper frame 211 are provided with rollers 2111 for driving the conveying belt 22 to move. The conveying driving device 23 is arranged on one side of the upper frame 211 and drives one of the rollers 2111 to rotate through chain transmission or belt transmission. The bottom frame 212 is arranged on the bottom wall of the upper frame 211, and a plurality of vacuum cavities 24 are arranged between the bottom frame 212 and the upper frame 211. In this embodiment, three vacuum cavities 24 are taken as an example for illustration. The three vacuum cavities 24 are arranged along the conveying direction, and a partition plate 25 is arranged between adjacent two vacuum cavities 24 to make them not communicated. One side of each vacuum cavity 24 is provided with an air pipe mounting hole 241 for mounting a vacuum pipe, and the air pipe mounting hole 241 is communicated with the inside of the vacuum cavity 24. The vacuum pipe is communicated with an external vacuum equipment.

[0042] In order to reduce the friction of the conveying belt 22, a plurality of supporting rollers (not shown in the figure) are arranged on the lower part of the upper frame 211. The supporting rollers extend transversely and are arranged along the extension direction of the upper frame 211 and can rotate around their own axes. The bottom frame 212 is arranged above the supporting rollers, and the bottom wall of the bottom frame 212 does not directly contact the supporting rollers. The inner side wall of the lower part of the conveying belt 22 abuts against the peripheral wall of the supporting rollers.

[0043] In order to facilitate the feeding of the wood chips 4, the positioning conveying mechanism 2 is provided with a feeding rack 26 on the first side of the feeding end of the positioning conveying mechanism 2, and one side of the feeding rack 26 is provided with an opening, so as to facilitate the wood chips 4 to enter the conveying belt 22. The positioning conveying mechanism 2 is provided with a positioning baffle 27 on the second side of the feeding end of the positioning conveying mechanism 2, the positioning baffle 27 protrudes from the conveying surface of the conveying belt 22, the positioning baffle 27 is arranged opposite to the feeding rack 26, and is used for blocking and positioning the wood chips 4. The positioning baffle 27 extends along the conveying direction, and preferably, the extension length of the positioning baffle 27 is greater than the length of the wood chips 4. During the conveying process, one side of the wood chips 4 is close to the side wall of the positioning baffle 27, so that the wood chips 4 are positioned, and under the cooperation of the vacuum adsorption, the wood chips 4 are not moved in the position of the conveying belt 22 all the time.

[0044] The discharging end of the positioning conveying mechanism 2 is provided with a pressing roller (not shown in the figure), the pressing roller is arranged across the two sides of the positioning conveying mechanism 2 in the transverse direction, and the peripheral wall of the pressing roller has a preset distance from the conveying surface of the positioning conveying mechanism 2. The preset distance is preferably the thickness of one wood chip 4. The wood chip 4 with the electronic tag passes under the pressing roller, and the pressing roller rolls and pastes the electronic tag on the wood chip 4, so that the electronic tag is prevented from falling off the wood chip 4.

[0045] As can be seen from the above, the positioning conveying mechanism is arranged to fix the wood chips and convey the wood chips forward; at least two labeling mechanisms are arranged, so that the wood chips can complete the pasting operation of at least two labels at the same time during the conveying process, and the working efficiency is high; the brake assembly and the pressing assembly are arranged at the front and rear ends of the label strip in the feeding direction of the label stripping plate respectively, so as to clamp the label strip, ensure that the label strip is always in a tension state at the front and rear ends of the label stripping plate, prevent loosening, especially prevent the label strip from loosening due to the inertia of the unwinding assembly when the labeling mechanism is paused, and facilitate the smooth operation of the labeling operation and reduce the failure rate. The label strip is always in a tension state, and the accuracy of the labeling position is also ensured.

[0046] Finally, it should be emphasized that the above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-head labelling device, characterised in that: The positioning conveying mechanism and at least two labeling mechanisms are arranged along the conveying direction of the positioning conveying mechanism, the labeling positions of the labeling mechanisms are arranged above the positioning conveying mechanism, and the labeling positions of the two labeling mechanisms are arranged staggered in the conveying direction of the positioning conveying mechanism. The labeling mechanism comprises a fixed base, a lifting adjusting assembly, a transverse adjusting assembly, a mounting plate, a unwinding assembly, a winding assembly, a brake assembly, a pressing assembly, a stripping plate and a plurality of guide rollers, the lifting adjusting assembly, the transverse adjusting assembly and the mounting plate are arranged on the fixed base, the lifting adjusting assembly can adjust the position of the mounting plate in the vertical direction, and the transverse adjusting assembly can adjust the position of the mounting plate in the transverse direction. The unwinding assembly is arranged on the upper part of the first side of the mounting plate, the winding assembly is arranged on the lower part of the first side of the mounting plate, the stripping plate is arranged on the lower part of the second side of the mounting plate and extends downward and forward to the conveying surface of the positioning conveying mechanism, a plurality of guide rollers are arranged on the mounting plate along the direction of the labeling tape, the brake assembly is arranged on one side of the unwinding assembly, and the pressing assembly is arranged between the stripping plate and the winding assembly and at the front and rear ends of the stripping plate in the direction of the labeling tape. The brake assembly comprises a fixed rod, a mounting rod and brake springs, the mounting rod is arranged on one side of the fixed rod, the first end of the brake spring is connected to the mounting rod, the second end of the brake spring extends to the fixed rod and abuts the peripheral wall of the fixed rod, and a gap is formed between the second end of the brake spring and the peripheral wall of the fixed rod for the labeling tape to pass through. The positioning conveying mechanism comprises a conveying mounting frame, a conveying belt and a conveying driving device, the conveying belt is wound on the outer side of the conveying mounting frame, and the conveying driving device drives the conveying belt to perform a conveying action; the conveying mounting frame is internally provided with a vacuum cavity, a plurality of air suction holes are formed in the top wall of the conveying mounting frame, and a plurality of perforations are formed in the conveying belt and are in communication with the vacuum cavity through the air suction holes. The pressing assembly comprises a pressing mounting frame, a power roller and two movable pressing sub-assemblies, the power roller is rotatably arranged on the middle part of the pressing mounting frame, and the two movable pressing sub-assemblies are arranged on the left and right sides of the power roller. The movable pressing sub-assembly comprises a rotating shaft, a movable pressing roller and two mounting members, the two mounting members are arranged at the two ends of the rotating shaft, the end part of the rotating shaft is connected to the pressing mounting frame through the first end of the mounting member, the movable pressing roller is connected between the second ends of the two mounting members, the movable pressing roller can rotate around the rotating shaft, the movable pressing roller abuts the power roller, and the distance between the surface of the movable pressing roller and the surface of the power roller is adjustable, and the labeling tape passes through the stripping plate first and then passes through between the two movable pressing rollers and the power roller in sequence.

2. The multi-head labeling device according to claim 1, characterized in that: In the vertical direction, two said movable pinch rollers are arranged on the upper and lower sides of the power roller respectively, and the rotating directions of the two movable pinch rollers are opposite.

3. The multi-head labeling device according to claim 1, characterized in that: The movable pinch sub-group further comprises an adjusting member and a locking member, the adjusting member is arranged on the back of the rotating direction of the mounting member and abuts against the mounting member, the locking member is connected to the pinch mounting frame through the adjusting member, and the height position of the adjusting member in the vertical direction is adjustable.

4. The multi-head labeling device according to claim 1, characterized in that: The labeling mechanism further comprises a tensioning assembly, the tensioning assembly is arranged on one side of the unwinding assembly, and the tensioning assembly comprises a tensioning roller, which can be elastically swung up and down.

5. The multi-head labeling device according to claim 1, characterized in that: The conveying mounting frame comprises an upper frame and a bottom frame, the bottom frame is arranged on the bottom wall of the upper frame, a plurality of said vacuum cavities are arranged between the bottom frame and the upper frame, the plurality of vacuum cavities are arranged in the conveying direction, and a partition plate is arranged between adjacent two said vacuum cavities.

6. The multi-head labeling device according to claim 1, characterized in that: A first side of the loading end of the positioning conveying mechanism is provided with a discharging rack, a second side of the loading end of the positioning conveying mechanism is provided with a positioning baffle, the positioning baffle protrudes from the conveying surface of the conveying belt, and the positioning baffle is arranged opposite to the discharging rack.

7. The multi-head labeling device according to claim 1, characterized in that: A discharging end of the positioning conveying mechanism is provided with a lower pressing roller, the lower pressing roller is arranged across the two sides of the positioning conveying mechanism in the transverse direction, and the lower pressing roller has a preset distance between the circumferential wall and the conveying surface of the positioning conveying mechanism.

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