Two-way labeling machine for square tank body

Abstract

The utility model discloses a bidirectional labeling machine for a square tank body. The bidirectional labeling machine comprises a belt conveying mechanism, a bottle pressing mechanism arranged right above the belt conveying mechanism, and two label guiding and labeling systems arranged on the two sides of the end part of the belt conveying mechanism, one end of an output shaft of a gear motor of the belt conveying mechanism is connected with a driving roller of the belt conveyor, the bottle pressing mechanism comprises two bottle pressing side plates and two bottle pressing belt wheels installed at the two ends of the bottle pressing side plates, a bottle pressing belt is arranged between the two bottle pressing belt wheels in a sleeved mode, and the other end of the output shaft is connected with the bottle pressing belt wheel at one end of the bottle pressing mechanism. The label guiding and pasting system comprises a position adjusting device and a label disc system. The bottle pressing mechanism of the labeling machine can synchronously run along with the belt conveying mechanism under the action of the variable-speed switching mechanism, and when the packaging bottles come out of the bottle distributing device, the bottle pressing mechanism can press the packaging bottles, so that the packaging bottles are in a stable state on the conveying belt, and the phenomenon that the packaging bottles topple due to thrust is avoided; therefore, two-way labeling can be carried out through the two sets of label guiding and labeling systems, the labor cost is reduced, and the labeling quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of labeling packaging cans, and in particular to a two-way labeling machine for square cans. Background Technology

[0002] Bottle labeling machines are widely used in the pharmaceutical, food, cosmetics, and daily chemical industries.

[0003] The working steps of existing bottle labeling machines are usually as follows: rolls of labels are placed in the labeling tray system of the machine, the conveyor belt moves the bottles, and when they are about to reach the labeling position, the bottle separating device evenly separates the bottles. When the designated labeling position is reached, the drive roller drives the roll of labels in the labeling tray system to separate the labels from the backing paper. The peeling plate removes the labels from the backing paper and makes them come into contact with the bottles and be flatly affixed to the bottles.

[0004] Current labeling machines suffer from poor stability when labeling flat, square plastic bottles on the conveyor belt. The bottles are subjected to a pushing force upon release from the bottle-separating device, causing them to tip over. This requires worker intervention to ensure continuous and stable operation. Furthermore, they typically only label one side, resulting in low efficiency. While existing labeling systems usually have positional adjustment functions to accommodate various bottle types and allow for fine-tuning, some product cans have angled sides requiring the label to be applied at an angle. The labeling system's positional adjustment alone cannot correct this angle, affecting labeling quality and requiring further improvement. Utility Model Content

[0005] To address the aforementioned problems, this utility model proposes a two-way labeling machine for square cans.

[0006] The technical solution of this utility model is: a two-way labeling machine for square cans, including a belt conveyor mechanism mounted on a frame, a bottle pressing mechanism located directly above the belt conveyor mechanism, two labeling guides symmetrically arranged on both sides of the end of the belt conveyor mechanism, and a bottle separating device; a reduction motor is installed at one end of the belt conveyor mechanism, and one end of the output shaft of the reduction motor is connected to the roller shaft of the drive roller of the belt conveyor; the bottle pressing mechanism includes two bottle pressing side plates arranged side by side and two bottle pressing pulleys installed at both ends of the bottle pressing side plates, and a bottle pressing belt is fitted between the two bottle pressing pulleys; the other end of the output shaft is connected to the bottle pressing pulley at one end of the bottle pressing mechanism through a speed change adapter; the labeling guides include a position adjustment device and a label plate system installed on the upper end of the position adjustment device.

[0007] Preferably, the position adjustment device includes a longitudinal linear module, a transverse linear module, an adjustment mechanism A, and an adjustment mechanism B. The longitudinal linear module is mounted on the transverse slide of the transverse linear module, the adjustment mechanism A is mounted on the longitudinal slide of the longitudinal linear module, and the adjustment mechanism B is mounted on the upper surface of the adjustment mechanism A. The dial system is mounted on the upper surface of the adjustment mechanism B. Both the adjustment mechanism A and the adjustment mechanism B are angle adjustment mechanisms. The angle adjustment direction of the adjustment mechanism A is consistent with the direction of the transverse linear module, and the angle adjustment direction of the adjustment mechanism B is consistent with the direction of the longitudinal linear module.

[0008] Preferably, the adjusting mechanism A includes a lower seat plate A and an upper seat plate A that are hinged to each other at one end. A lower rotating seat A is provided at the middle of the other end of the lower seat plate A, and an upper rotating seat A is provided at the middle of the other end of the upper seat plate A. A threaded hole is provided in the middle of the upper rotating seat A, and a lower screw is connected in the threaded hole. The lower end of the lower screw is rotatably connected to the lower seat plate A. The adjusting mechanism B includes a lower seat plate B and an upper seat plate B that are hinged to each other at one end. A lower rotating seat B is provided at the middle of the other end of the lower seat plate B, and an upper rotating seat B is provided at the middle of the other end of the upper seat plate B. A threaded hole is provided in the middle of the upper rotating seat B, and an upper screw is connected in the threaded hole. The lower end of the upper screw is rotatably connected to the lower seat plate B.

[0009] Preferably, the lower seat plate A is hinged to a locking plate at its end, and the locking plate has an adjustment hole in its middle. The upper seat plate A is provided with a screw at its end, which is slidably connected in the adjustment hole. The lower seat plate B is hinged to a locking plate at its end, and the locking plate has an adjustment hole in its middle. The upper seat plate B is provided with a screw at its end, which is slidably connected in the adjustment hole.

[0010] Preferably, the speed-changing transfer mechanism includes a first belt assembly and a second belt assembly. The first belt assembly includes pulley A and pulley B installed between two side-by-side first side plates, with a first belt connecting pulley A and pulley B. Pulley A is connected to the output shaft. The second belt assembly includes pulley C and pulley D installed between two side-by-side second side plates, with a second belt connecting pulley C and pulley D. Corresponding pulleys B and C are coaxially connected via a synchronous shaft. Pulley D is connected to the bottle-pressing pulley via a speed-changing assembly. The speed-changing assembly includes a small gear coaxially connected to pulley D and a large gear connected to the axle of the bottle-pressing pulley. The large gear and the small gear mesh.

[0011] Preferably, a square cylindrical seat is provided between the lower parts of the two pressure bottle side plates. Several guide posts are slidably arranged at equal intervals inside the square cylindrical seat. A wear-resistant strip that is pressed against the lower inner side of the pressure bottle pulley is connected between the lower ends of the guide posts. A spring is sleeved between the limiting step at the lower part of the guide posts and the bottom surface of the top plate of the square cylindrical seat.

[0012] Preferably, the labeling system includes an automatic winding and unwinding control mechanism, comprising a support arm and a tensioning plate hinged at their ends. A support shaft is vertically positioned at the center of the support arm's surface. A label holder is coaxially rotatably connected to the lower part of the support shaft. A label tray is coaxially mounted on the label holder. An annular groove is provided on the outer side of the label holder. A guide roller is provided at the outer end of the tensioning plate. An elastic band is fitted inside the annular groove. One end of the elastic band is fixed to the center of the tensioning plate, and the other end is fixed to the outer end of the support arm. A tension spring is connected between the inner end of the tensioning plate and the center of the side of the support arm.

[0013] Preferably, the surface of the support arm is provided with a locking seat A, and the elastic band is inserted into the locking hole A of the locking seat A. The surface of the tensioning plate is provided with a locking seat B, and the elastic band is inserted into the locking hole B of the locking seat B. The locking seat A is located on the inner side of the tensioning plate and can support the end of the tensioning plate on the inner side of the hinge point.

[0014] Preferably, both locking seat A and locking seat B have radially threaded holes on their sides, and set screws are installed in the threaded holes.

[0015] The beneficial technical effects of this utility model are:

[0016] (1) The labeling machine is equipped with a bottle pressing mechanism above the belt conveyor. Under the action of the speed change mechanism, the bottle pressing mechanism will run synchronously with the belt conveyor. When the packaging bottle comes out of the bottle separating device, the bottle pressing mechanism can press the packaging bottle to keep it in a stable state on the conveyor belt, avoiding the phenomenon of tipping over due to thrust. The labeling machine can be kept running continuously and stably without manual intervention. Therefore, two-way labeling can be carried out through two sets of labeling guide systems, which helps to reduce labor costs and improve labeling quality.

[0017] (2) The labeling machine uses a linear module arranged in a longitudinal and transverse manner to adjust the labeling plate system above. At the same time, by turning the screw of the adjustment mechanism on the linear module, the upper seat plate can be driven to tilt and rise, thereby changing the tilt of the labeling plate system. The tilt of the labeling plate system can be adjusted in two directions by the two adjustment mechanisms arranged vertically and crosswise, so as to realize the multi-directional and multi-angle position adjustment of the labeling plate system, making it suitable for labeling operations of various design structures of tanks and ensuring labeling quality.

[0018] (3) The automatic control mechanism for unwinding and rewinding of the labeling machine forms an unwinding tensioning mechanism by pulling the end of the tensioning plate with a tension spring. An annular groove is set on the label roll seat. Rubber tubes connected to the support arm and the tensioning plate at both ends are installed in the annular groove. When the label guide peeling encounters obstruction and the operation is not smooth, the required tension force becomes weaker. The spring will pull back the tensioning plate, and the tensioning plate will pull the rubber tube to tighten the annular groove on the label roll seat, thus stopping the label roll seat in time. This avoids the label roll from continuing to unwind due to inertia, which would cause the labels to bend and stack. This can protect the labels and reduce the frequency of system maintenance. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the position adjustment device after the label system is installed;

[0021] Figure 3 This is a three-dimensional structural diagram of the position adjustment device;

[0022] Figure 4 This is a top view of the position adjustment device.

[0023] Figure 5 yes Figure 4 A schematic diagram of the AA-direction cross-section structure;

[0024] Figure 6 yes Figure 4 Schematic diagram of the BB-direction cross-section structure;

[0025] Figure 7 This is a three-dimensional structural diagram of the position adjustment device after removing adjustment mechanism B;

[0026] Figure 8 This is a three-dimensional structural diagram of adjustment mechanism B;

[0027] Figure 9 This is a three-dimensional structural diagram of the automatic winding and unwinding control mechanism;

[0028] Figure 10 This is a top view of the automatic winding and unwinding control mechanism after the standard roll has been installed;

[0029] Figure 11 This is a three-dimensional structural diagram of the automatic winding and unwinding control mechanism after the label tray has been removed;

[0030] Figure 12 This is a side view of the automatic winding and unwinding control mechanism after the label tray has been removed.

[0031] Figure 13 yes Figure 12 Schematic diagram of the CC-direction cross-section structure;

[0032] Figure 14 This is a three-dimensional structural diagram of the present invention after removing some components;

[0033] Figure 15 This is a three-dimensional structural diagram of the speed change mechanism (with the belt removed).

[0034] Figure 16 This is a three-dimensional structural diagram of the bottle pressing mechanism;

[0035] Figure 17 yes Figure 16 Schematic diagram of the DD-direction cross-section structure;

[0036] Figure 18 This is a three-dimensional structural diagram of the internal components of the bottle pressing mechanism.

[0037] In the diagram, 001. Frame, 01. Belt conveyor mechanism, 11. Gear motor, 12. Output shaft, 13. Drive roller, 14. Conveyor belt, 02. Bottle pressing mechanism, 21. Bottle pressing side plate, 22. Bottle pressing pulley, 23. Bottle pressing belt, 24. Axle of bottle pressing pulley, 25. Square tube base, 26. Guide post, 27. Wear-resistant strip, 28. Spring, 3. First belt assembly, 31. First side plate, 32. Pulley A, 33. Pulley B, 3 4. First belt; 4. Second belt assembly; 41. Second side plate; 42. Pulley C; 43. Pulley D; 44. Second belt; 45. Synchronous shaft; 46. Pinion; 47. Gear; 51. Upper pressure pulley; 52. Lower pressure pulley; 61. Lifting plate; 62. Vertical support column; 63. Bottle separating device; 74. Position adjustment device; 71. Longitudinal linear module; 711. Lead screw; 72. Transverse linear module; 721. Transverse slide. 73. Adjusting Mechanism A, 74. Adjusting Mechanism B, 75. Label System, 81. Lower Seat Plate A, 82. Upper Seat Plate A, 83. Lower Rotary Seat A, 84. Upper Rotary Seat A, 85. Lower Screw, 91. Lower Seat Plate B, 92. Upper Seat Plate B, 93. Lower Rotary Seat B, 94. Upper Rotary Seat B, 95. Upper Screw, 101. Locking Plate, 102. Adjusting Hole, 103. Screw, 104. Arc Groove, 20. Guide Labeling System, 2 0. Automatic winding and unwinding control mechanism; 201. Support arm; 202. Support shaft; 203. Label holder; 204. Annular groove; 205. Tensioning plate; 206. Guide roller; 207. Tension spring; 208. Locking seat A; 209. Locking hole A; 300. Locking seat B; 301. Locking hole B; 302. Top screw; 303. Label pressure roller; 304. Limiting ring; 305. Rubber tube; 306. Label tray; 307. Label. Detailed Implementation

[0038] Example 1, see appendix Figure 1-8A bidirectional labeling machine for square cans includes a belt conveyor mechanism 01 mounted on a frame 001, a bottle pressing mechanism 02 positioned directly above the belt conveyor mechanism, two labeling guide systems 20 symmetrically arranged on both sides of the end of the belt conveyor mechanism 01, and a bottle separating device 63. The two labeling guide systems 20 allow for simultaneous labeling of both sides of the square can. This embodiment uses the commonly used bottle separating device 63, which will not be described in detail here. A worm gear reducer motor 11 is mounted at one end of the belt conveyor mechanism 01, and one end of the output shaft 12 of the reducer motor 11 is connected to... The drive roller 13 of the belt conveyor is connected to the roller shaft, and the conveyor belt 14 is sleeved between the drive rollers 13 at both ends. The bottle pressing mechanism 02 includes two bottle pressing side plates 21 arranged side by side and two bottle pressing pulleys 22 installed at both ends of the bottle pressing side plates 21. The width of the bottle pressing pulleys is smaller than the width of the conveyor belt. A bottle pressing belt 23 is sleeved between the two bottle pressing pulleys 22. The other end of the output shaft 12 is connected to the bottle pressing pulley 22 at one end of the bottle pressing mechanism 02 through a speed change conversion mechanism. The labeling system 20 includes a position adjustment device 07 and a label plate system 75 installed on the upper end of the position adjustment device.

[0039] The position adjustment device 07 includes a longitudinal linear module 71, a transverse linear module 72, an adjustment mechanism A 73, and an adjustment mechanism B 74. The longitudinal linear module is mounted on the transverse slide 721 of the transverse linear module. The adjustment mechanism A 73 is mounted on the longitudinal slide of the longitudinal linear module 71. The adjustment mechanism B 74 is mounted on the upper surface of the adjustment mechanism A 73. The dial system 75 is mounted on the upper surface of the adjustment mechanism B 74. Both the adjustment mechanism A and the adjustment mechanism B are angle adjustment mechanisms. The translation and tilt adjustment of the dial system 75 are achieved through the combination of the linear module and the angle adjustment mechanism. The angle adjustment direction of the adjustment mechanism A 73 is consistent with the direction of the transverse linear module 72, and the angle adjustment direction of the adjustment mechanism B 74 is consistent with the direction of the longitudinal linear module 71.

[0040] The adjustment device uses a longitudinally and transversely arranged linear module to translate and adjust the upper labeling system 75. At the same time, the tilt of the labeling system 75 can be adjusted to one side by adjustment mechanism A 73, and the tilt of the labeling system can be adjusted to the other side by adjustment mechanism B 74. The two adjustment mechanisms are arranged vertically and crosswise to adjust the tilt of the labeling system 75 in two directions, realizing multi-directional and multi-angle position adjustment of the labeling system 75, making it suitable for labeling operations on tanks with various design structures.

[0041] Both the longitudinal linear module 71 and the transverse linear module 72 are guide rail and lead screw linear modules 711. The guide rail and lead screw linear module drives the slider to move linearly through the combination of guide rail and lead screw.

[0042] The adjusting mechanism A 73 includes a lower seat plate A 81 and an upper seat plate A 82 that are hinged to each other at one end. The upper seat plate A can tilt and flip upward with the hinge point as support. The other end of the lower seat plate A 81 is provided with a lower rotating seat A 83, and the other end of the upper seat plate A 82 is provided with an upper rotating seat A 84. Both the upper and lower rotating seats A can rotate freely. The upper rotating seat A 84 is provided with a threaded hole in the middle, and a lower screw 85 is connected in the threaded hole. The lower end of the lower screw is rotatably connected to the lower seat plate A 81.

[0043] When the lower screw 85 is rotated, the lower rotating seat 83 provides rotational support for the lower end of the screw. The lower screw drives the upper rotating seat 84 to rise or fall along the lower screw 85 via a thread. During the rising and falling process, the lower rotating seat 83 and the upper rotating seat 84 will rotate accordingly, so that the upper rotating seat 84, along with the upper seat plate 82, tilts and rises or falls, thereby changing the tilt angle of the label system 75.

[0044] A locking plate 101 is hinged to the end of the lower base plate 81. An adjustment hole 102 is provided in the middle of the locking plate 101. A screw 103 is provided at the end of the upper base plate 82, and the screw is slidably connected in the adjustment hole 102. During the tilting and lifting of the upper base plate 82, the screw 103 drives the locking plate 101 through the adjustment hole 102. The locking plate rotates and moves synchronously with the upper base plate 82. After adjustment, the screw 103 is tightened to lock the locking plate 101 between the upper base plate 82 and the lower base plate 81, and the lower screw 85 is used to fix the upper base plate 82 to ensure that it has sufficient support stability for the calibration plate system 75.

[0045] The adjusting mechanism B 74 includes a lower seat plate B 91 and an upper seat plate B 92 that are hinged to each other at one end. The upper seat plate B has at least three arc-shaped grooves 104 evenly distributed in the middle. The base of the dial system 75 is connected to the arc-shaped grooves 104 by bolts. The upper seat plate B 92 can tilt and flip upward with the hinge point as support. The other end of the lower seat plate B 91 is provided with a lower rotating seat B 93, and the other end of the upper seat plate B 92 is provided with an upper rotating seat B 94. Both the upper rotating seat B and the lower rotating seat B 93 can rotate freely. The upper rotating seat B 94 is provided with a threaded hole in the middle, and an upper screw 95 is connected in the threaded hole. The lower end of the upper screw is rotatably connected to the lower seat plate B 91.

[0046] When the upper screw 95 is rotated, the lower rotating seat 93 provides rotational support for the lower end of the screw. The upper screw 95 drives the upper rotating seat 94 to rise or fall along the upper screw 95 via a thread. During the rising and falling process, the lower rotating seat 93 and the upper rotating seat 94 will rotate accordingly, so that the upper rotating seat 94, along with the upper seat plate 92, tilts and rises or falls, thereby changing the tilt angle of the label system 75.

[0047] A locking plate 101 is hinged to the end of the lower seat plate B 91, and an adjustment hole 102 is provided in the middle of the locking plate. A screw 103 is provided at the end of the upper seat plate B 92, and the screw is slidably connected in the adjustment hole 102. During the tilting and lifting of the upper seat plate A 82, the screw 103 drives the locking plate 101 through the adjustment hole 102. The locking plate 101 rotates and moves synchronously with the upper seat plate A 82. After adjustment, the screw 103 is tightened to lock the locking plate 101 between the upper seat plate A 82 and the lower seat plate A 81, and the lower screw 85 is used to fix the upper seat plate A 82 to ensure that it has sufficient support stability for the calibration plate system 75.

[0048] Example 2, see appendix Figure 14-18 This embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The difference is that a square tube seat 25 is provided between the lower parts of the two bottle pressing side plates 21. Several guide posts 26 are slidably arranged at equal intervals inside the square tube seat 25. The lower ends of the guide posts are connected to wear-resistant strips 27 that are pressed against the lower inner side of the bottle pressing pulley 22. A spring 28 is sleeved between the limiting step at the lower part of the guide post 26 and the bottom surface of the top plate of the square tube seat 25. The spring provides vertical pushing force to the guide post 26. These vertical pushing forces are synchronously transmitted to the wear-resistant strips 27. The wear-resistant strips 27 are horizontally supported on the inner side of the bottle pressing belt 23, so that the two ends and the middle of the bottle pressing belt 23 are on the same plane. This avoids the phenomenon that the bottle pressing belt 23 is uneven and causes different pressing forces on the packaging bottle at different positions, ensuring the uniformity of the bottle pressing force and further improving the stability of the packaging bottle.

[0049] The ends of the two bottle-pressing side plates 21 are provided with an upper pressure pulley 51 and a lower pressure pulley 52 that are pressed against the inner side of the bottle-pressing belt 23. The upper pressure pulley 51 and the lower pressure pulley 52 provide tension to the bottle-pressing belt 23 at both ends.

[0050] The bottle pressing mechanism 02 is mounted on the vertical support column 62 via the lifting plate 61. The lifting plate is driven to move along the vertical support column by the lifting screw to change the height of the bottle pressing mechanism 02, so that it can be used for packaging bottles of different sizes.

[0051] The speed-changing mechanism includes a first belt assembly 3 and a second belt assembly 4. The first belt assembly 3 includes pulley A 32 and pulley B 33 installed between two first side plates 31 arranged side by side. A first belt 34 connects pulley A and pulley B. Pulley A 32 is the driving pulley, which provides power to drive the first belt 34 to rotate between the two pulleys. Pulley A 32 is connected to the output shaft 12. The reduction motor 11 can drive pulley A 32 of the bottle pressing mechanism 02 and the driving roller 13 of the belt conveyor mechanism 01 through the output shaft 12. The first belt assembly 3 transmits power to the second belt assembly 4 through the synchronous shaft 45. The first belt assembly 3 transmits power to the second belt assembly 4 through the synchronous shaft 45. The second belt assembly 44 is connected between the pulleys C and D. The corresponding pulleys B 33 and C 42 are coaxially connected through the synchronous shaft 45. The pulleys D 43 are connected to the bottle pressing pulley 22 through the speed change assembly. The second belt assembly transmits power to the bottle pressing pulley 22.

[0052] The speed change assembly includes a small gear 46 coaxially connected to the pulley 43 and a large gear 47 connected to the axle 24 of the bottle pressing pulley. The large gear and the small gear mesh, and the gear set formed by the combination of the large gear 47 and the small gear 46 changes the transmission ratio, so that the belt conveyor mechanism 01 and the bottle pressing mechanism 02 rotate at the same speed, and the bottle pressing belt 23 can press the packaging bottle and move synchronously and stably on the conveyor belt 14.

[0053] A tensioning wheel A is provided between the middle of the two first side plates 31, pressing against the inner side of the first belt 34. A tensioning wheel B is provided between the middle of the two second side plates 41, pressing against the inner side of the second belt 44. The tensioning wheels ensure that the belt is in a taut state, and avoid belt slippage that would cause the conveyor belt 14 and the bottle pressing belt 23 to be out of sync.

[0054] When the pressing and conveying synchronous drive device of this embodiment is running, the reduction motor 11 transmits power to the drive roller 13 and the speed change mechanism of the belt conveyor 01 through the output shaft 12. The drive roller 13 drives the conveyor belt 14 to run, and the packaging bottle runs forward on the conveyor belt 14. After the speed change mechanism changes the speed, it transmits power to the bottle pressing pulley 22. The bottle pressing belt 23 rotates between the two bottle pressing belts 23. The conveyor belt 14 and the bottle pressing belt 23 are in a synchronous running state. When the packaging bottle comes out of the bottle separating device 63, the bottle pressing belt 23 presses against the surface of the bottle cap, providing it with vertical pressing force, so that it is in a stable state on the conveyor belt. There will be no phenomenon of the packaging bottle tipping over due to the pushing force of the bottle separating device 63, ensuring the continuous and stable operation of the labeling machine.

[0055] Example 3, see appendix Figure 9-13This embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The difference is that the label system 75 is provided with an automatic winding and unwinding control mechanism 20, including a support arm 201 and a tensioning plate 205 with their ends hinged to each other. A support shaft 202 is vertically provided in the middle of the surface of the support arm 201. The lower part of the support shaft 202 is coaxially rotatably connected to a label holder 203. A label tray 306 is coaxially mounted on the label holder 203. The label tray 306 rotates on the support shaft 202 through the label holder 203. An annular groove 204 is provided on the outer side of the label holder 203. A guide roller 206 is provided at the outer end of the tensioning plate 205. A roller shaft is sleeved inside the guide roller 206. The lower end of the roller shaft is vertically fixedly connected to the tension plate 205. The guide roller 206 is fitted on the vertical shaft, and the lower end of the vertical shaft is fixedly connected to the tension plate 205. An elastic band is fitted inside the annular groove 204. One end of the elastic band is fixed to the middle of the tension plate 205, and the other end is fixed to the outer end of the support arm 201. When the tension plate 205 swings outward, it will pull the elastic band, and the elastic band will tighten the annular groove 204, thus stopping the label holder 203 in time. A tension spring 207 is connected between the inner end of the tension plate 205 and the middle of the side of the support arm 201. The tension plate 205 is pulled at the end by the spring 28, and the guide roller 206 on the tension plate 205 generates elastic tension force.

[0056] The elastic band is a rubber tube 305. The rubber tube 305 itself has a good anti-slip effect, and it will elastically deform under pressure, squeezing into the annular groove 204 of the label holder 203. It has high braking sensitivity and good braking effect on the label holder 203.

[0057] Two limiting rings 304 are arranged side by side in the middle of the guide roller 206. The limiting rings 304 are coaxially arranged with the guide roller 206. The width of the label is the same as the distance between the two limiting rings 304. The limiting rings 304 restrict the label to prevent it from sliding along the outer side of the guide roller 206 shaft and causing misalignment.

[0058] The surface of the support arm 201 is provided with a locking seat A 208, and the elastic band is fitted into the locking hole A 209 of the locking seat A 208. The surface of the tensioning plate 205 is provided with a locking seat B 300, and the elastic band is fitted into the locking hole B 301 of the locking seat B 300. Both the locking seat A 208 and the locking seat B 300 have radially threaded holes on their sides, and set screws 302 are installed in the threaded holes. The ends of the elastic band are pressed against the two locking seats by the set screws 302, locking and fixing both ends of the elastic band to the two locking seats. At the same time, after releasing the set screws 302, the elastic band can be pulled outward from the locking holes to adjust the tension of the elastic band, thereby changing the braking sensitivity of the elastic band in the annular groove 204 as needed.

[0059] The locking seat 208 is located inside the tension plate 205 and can support the end of the tension plate 205 inside the hinge point. While locking the elastic band, the locking seat 208 can also limit the end of the tension plate 205, restrict the rotation and swing range of the tension plate 205, and prevent it from contacting the tape holder 203 and causing mutual interference.

[0060] The principle of the automatic control mechanism in this embodiment is as follows: the tension spring 207 pulls the end of the tension plate 205, causing the guide roller 206 at the other end of the tension plate 205 to generate tension on the label wrapped around it. The label is unwound in a tensioned state. When the label guide peeling encounters resistance and the operation is not smooth, the label will become loose and the required tension will weaken. The spring 28 will pull back the tension plate 205, and the tension plate 205 will pull the rubber tube 305 accordingly. The rubber tube 305 is stretched and undergoes elastic deformation and tightens the annular groove 204 on the label roll holder 203, stopping the label roll holder 203 in time. The label roll 307 on the label roll tray 306 stops unwinding, which can effectively avoid the phenomenon of the label roll bending and stacking due to inertia continuing to unwind.

Claims

1. A two-way labeling machine for square cans, characterized in that: The system includes a belt conveyor mounted on a frame, a bottle pressing mechanism positioned directly above the belt conveyor, two labeling systems symmetrically positioned on either side of the belt conveyor's end, and a bottle separating device. A geared motor is mounted at one end of the belt conveyor, with its output shaft connected to the drive roller of the belt conveyor. The bottle pressing mechanism includes two side-by-side bottle pressing plates and two bottle pressing pulleys mounted at both ends of the side plates. A bottle pressing belt is fitted between the two pulleys. The other end of the output shaft is connected to the bottle pressing pulley at one end of the bottle pressing mechanism via a speed-changing adapter. The labeling system includes a position adjustment device and a label plate system mounted on top of the position adjustment device.

2. The two-way labeling machine for square cans according to claim 1, characterized in that: The position adjustment device includes a longitudinal linear module, a transverse linear module, adjustment mechanism A, and adjustment mechanism B. The longitudinal linear module is mounted on the transverse slide of the transverse linear module, adjustment mechanism A is mounted on the longitudinal slide of the longitudinal linear module, and adjustment mechanism B is mounted on the upper surface of adjustment mechanism A. The dial system is mounted on the upper surface of adjustment mechanism B. Both adjustment mechanism A and adjustment mechanism B are angle adjustment mechanisms. The angle adjustment direction of adjustment mechanism A is consistent with the direction of the transverse linear module, and the angle adjustment direction of adjustment mechanism B is consistent with the direction of the longitudinal linear module.

3. The two-way labeling machine for square cans according to claim 2, characterized in that: The adjustment mechanism A includes a lower seat plate A and an upper seat plate A that are hinged to each other at one end. A lower rotating seat A is provided at the middle of the other end of the lower seat plate A, and an upper rotating seat A is provided at the middle of the other end of the upper seat plate A. A threaded hole is provided in the middle of the upper rotating seat A, and a lower screw is connected in the threaded hole. The lower end of the lower screw is rotatably connected to the lower seat plate A. The adjustment mechanism B includes a lower seat plate B and an upper seat plate B that are hinged to each other at one end. A lower rotating seat B is provided at the middle of the other end of the lower seat plate B, and an upper rotating seat B is provided at the middle of the other end of the upper seat plate B. A threaded hole is provided in the middle of the upper rotating seat B, and an upper screw is connected in the threaded hole. The lower end of the upper screw is rotatably connected to the lower seat plate B.

4. The two-way labeling machine for square cans according to claim 3, characterized in that: The lower seat plate A is hinged to a locking plate at its end, and the locking plate has an adjustment hole in the middle. The upper seat plate A has a screw at its end, which is slidably connected in the adjustment hole. The lower seat plate B is hinged to a locking plate at its end, and the locking plate has an adjustment hole in the middle. The upper seat plate B has a screw at its end, which is slidably connected in the adjustment hole.

5. A two-way labeling machine for square cans according to claim 1, characterized in that: The speed-changing mechanism includes a first belt assembly and a second belt assembly. The first belt assembly includes pulley A and pulley B installed between two side-by-side first side plates, with a first belt connecting pulley A and pulley B. Pulley A is connected to the output shaft. The second belt assembly includes pulley C and pulley D installed between two side-by-side second side plates, with a second belt connecting pulley C and pulley D. Corresponding pulleys B and C are coaxially connected via a synchronous shaft. Pulley D is connected to the bottle-pressing pulley via a speed-changing assembly. The speed-changing assembly includes a small gear coaxially connected to pulley D and a large gear connected to the axle of the bottle-pressing pulley. The large gear and the small gear mesh.

6. A two-way labeling machine for square cans according to claim 5, characterized in that: A square tube seat is provided between the lower parts of the two pressure bottle side plates. Several guide posts are slidably arranged at equal intervals inside the square tube seat. Wear-resistant strips that are pressed against the inner side of the lower part of the pressure bottle pulley are connected between the lower ends of the guide posts. A spring is sleeved between the limiting step at the lower part of the guide post and the bottom surface of the top plate of the square tube seat.

7. A two-way labeling machine for square cans according to claim 1, characterized in that: The labeling system includes an automatic winding and unwinding control mechanism, comprising a support arm and a tensioning plate hinged at their ends. A support shaft is vertically positioned at the center of the support arm's surface. A label holder is coaxially rotatably connected to the lower part of the support shaft. A label tray is coaxially mounted on the label holder. An annular groove is provided on the outer side of the label holder. A guide roller is provided at the outer end of the tensioning plate. An elastic band is fitted inside the annular groove. One end of the elastic band is fixed to the center of the tensioning plate, and the other end is fixed to the outer end of the support arm. A tension spring is connected between the inner end of the tensioning plate and the center of the side of the support arm.

8. A two-way labeling machine for square cans according to claim 7, characterized in that: The surface of the support arm is provided with a locking seat A, and the elastic band is inserted into the locking hole A of the locking seat A. The surface of the tensioning plate is provided with a locking seat B, and the elastic band is inserted into the locking hole B of the locking seat B. The locking seat A is located on the inner side of the tensioning plate and can support the end of the tensioning plate on the inner side of the hinge point.

9. A two-way labeling machine for square cans according to claim 8, characterized in that: Both locking seat A and locking seat B have radially threaded holes on their sides, and set screws are installed in the threaded holes.

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