A printing device and method for boutique packaging

Abstract

The application discloses a printing device for exquisite packaging and relates to the technical field of printing devices.The printing device comprises a main body, a feeding roller and an alternate traction mechanism are arranged on the main body, the feeding roller is provided with two groups, and a roll of paper is arranged on each of the two groups of feeding rollers; the alternate traction mechanism comprises two groups of traction assemblies which operate alternately, and the two groups of traction assemblies are respectively used for traction of the two groups of rolls of paper; after traction of one group of rolls of paper is completed by one group of traction assemblies, traction of the other group of rolls of paper is performed by the other group of traction assemblies. The printing device for exquisite packaging provided by the application can perform traction of the two groups of rolls of paper on the two groups of feeding rollers through the two groups of traction assemblies; after traction of one group of rolls of paper is completed by one group of traction assemblies, the alternate traction mechanism switches the operation of the other group of traction assemblies so as to perform traction of the other group of rolls of paper through the other group of traction assemblies, thereby realizing alternate conveying of the two groups of rolls of paper without shutdown.

Description

Technical Field

[0001] This invention relates to the field of printing apparatus technology, and specifically to a printing apparatus and method for high-quality packaging. Background Technology

[0002] Premium packaging includes labels that provide consumers with essential information, such as the product name, brand, ingredients, weight, expiration date, and production date. When printing these labels, printing machines and specialized techniques are typically used to ensure they are legible, durable, and compliant with relevant regulations.

[0003] For example, the patent document with authorization announcement number CN106042659B, authorization announcement date December 5, 2017, and titled "A Flexible Label Marking and Cutting Device," describes a method of mounting a roll of flexible tape for making flexible labels on a feeding roller. The flexible tape passes between the surfaces of a first driving roller and a first driven roller. The first driving roller rotates and conveys the flexible tape onto a work platform. This patent enables continuous and rapid manufacturing of flexible labels, and it features a simple structure and low cost.

[0004] In existing printing equipment, there is usually only one feeding mechanism. The paper roll on the feeding mechanism can keep rotating to continuously feed the paper. After the paper roll is used up, the printing equipment needs to stop operating to replace the paper roll, which reduces the working efficiency of the printing equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a printing apparatus and method for premium packaging to address the aforementioned shortcomings of the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A printing apparatus for premium packaging includes a main body, on which are disposed:

[0008] The feeding rollers are provided in two sets, and each set of the feeding rollers is fitted with a roll of paper.

[0009] An alternating traction mechanism includes two sets of traction components that operate alternately. The two sets of traction components are used to traction two sets of paper rolls respectively. After one set of traction components completes traction of one set of paper rolls, the other set of traction components tractions the other set of paper rolls.

[0010] The above-mentioned printing device for premium packaging has a connecting part fixed on the main body, a traction channel constructed on the connecting part, and a cutter slidably connected to the connecting part.

[0011] The aforementioned printing device for premium packaging has an adsorption plate slidably connected to its main body.

[0012] The above-mentioned printing device for premium packaging has a conveying roller and two drive rollers rotatably connected to the main body, and an adjusting roller slidably connected to the main body.

[0013] In the aforementioned printing device for premium packaging, two extrusion plates are provided in the traction channel, and a first elastic element is provided between the extrusion plates and the connecting part.

[0014] In the aforementioned printing device for premium packaging, a contact rod is hinged to the connecting part, a torsion spring is provided between the contact rod and the connecting part, a stop is constructed on the connecting part, and a protrusion is constructed on the cutter.

[0015] The aforementioned printing apparatus for premium packaging includes a traction component comprising a drive roller rotatably connected to the main body and a driven roller slidably connected to the main body.

[0016] In the aforementioned printing apparatus for premium packaging, a movable block is slidably connected to the main body, and both driven rollers are rotatably connected to the movable block.

[0017] In the aforementioned printing apparatus for premium packaging, the two drive rollers are respectively connected to two active roller shafts.

[0018] A printing method for premium packaging, based on any of the above-mentioned printing apparatus, includes two sets of feed rollers, wherein after the roll of paper is pulled by one set of feed rollers, the roll of paper is switched to be pulled by the other set of feed rollers.

[0019] In the above technical solution, the present invention provides a printing device for high-quality packaging. By setting two sets of traction components, the device can pull the rolls of paper on two sets of feed rollers respectively. After one set of traction components completes the pulling of one set of rolls of paper, the alternating traction mechanism switches the operation of the other set of traction components to pull the other set of rolls of paper. This allows the alternating conveying of the two sets of rolls of paper to be achieved without stopping the machine, thereby improving the working efficiency of the printing device. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the adjusting roller structure provided in another embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the driving block and extrusion plate structure provided in another embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the first elastic element structure provided in another embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of a traction channel structure provided in another embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of a drive wheel structure provided in another embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of a connecting plate structure provided in another embodiment of the present invention;

[0028] Figure 8 A schematic diagram of a limiting groove structure provided in another embodiment of the present invention;

[0029] Figure 9 Provided for another embodiment of the present invention Figure 8 Enlarged structural diagram at point A in the middle.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Main body; 2. Feeding roller; 3. Paper roll; 4. Connecting part; 5. Traction channel; 6. Cutter; 7. Drive block; 8. Cylinder; 9. Adsorption plate; 10. Hydraulic rod; 11. Conveying roller; 12. Drive roller; 13. Adjusting roller; 14. Slider; 15. Extrusion plate; 16. First elastic element; 17. Abutment rod; 18. Stop block; 19. Protrusion; 20. Drive roller shaft; 21. Driven roller shaft; 22. Movable block; 23. Support; 24. Drive wheel; 25. Transmission wheel; 26. Transmission belt; 27. L-shaped rod; 28. Connecting plate; 29. ​​Connecting groove; 30. Limiting block; 31. Second elastic element; 32. Limiting hole. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] Reference Figure 1-9This invention provides a printing apparatus for premium packaging, comprising a main body 1, on which a feeding roller 2 and an alternating traction mechanism are provided. The feeding roller 2 is provided in two sets, and each set of the feeding roller 2 is fitted with a roll of paper 3. The alternating traction mechanism includes two sets of traction components that operate alternately. The two sets of traction components are used to traction two sets of rolls of paper 3 respectively. After one set of traction components completes traction of one set of rolls of paper 3, the other set of traction components tractions the other set of rolls of paper 3.

[0034] Specifically, high-quality packaging requires numerous labels to display product information. These labels are mass-printed using rolls of paper 3 during production. The printing apparatus generally includes a feeding mechanism, a printing mechanism, a transmission mechanism, and a control mechanism. The feeding mechanism comprises a feeding roller 2 and rolls of paper 3 (rolls of paper 3 are special sheets of paper used for label printing). The feeding roller 2 is rotatably connected to the main body 1 (the main body 1 typically has two side plates, with the two ends of the feeding roller 2 connected to these side plates respectively), continuously feeding the rolls of paper 3 to the printing mechanism as the feeding roller 2 rotates. All of the above is existing technology and will not be elaborated further. The innovation of this invention lies in the provision of two sets of feeding rollers 2 and an alternating traction mechanism on the main body 1. The alternating traction mechanism includes two sets of traction components, which can be two rollers rotating synchronously and in opposite directions as in the prior art. In this way, the roll paper 3 on one set of feeding rollers 2 can be pulled by one set of traction components. After the roll paper 3 on one set of feeding rollers 2 is used up, the alternating traction mechanism can switch to another set of traction components to pull the roll paper 3 on the other set of feeding rollers 2. In this way, the roll paper 3 on the two sets of feeding rollers 2 can be fed alternately, thereby delivering the roll paper 3 to the printing mechanism without stopping the machine. When one feeding roller 2 is feeding, the operator can perform operations such as changing the roll paper 3 on the other set of feeding rollers 2, so that the alternating traction mechanism can operate smoothly.

[0035] The present invention provides a printing apparatus for high-quality packaging, which can pull the rolls of paper 3 on two sets of feed rollers 2 respectively by setting two sets of traction components. After one set of traction components completes the pulling of one set of rolls of paper 3, the alternating traction mechanism switches the operation of the other set of traction components to pull the other set of rolls of paper 3. Thus, the two sets of rolls of paper 3 can be alternately transported without stopping the machine, thereby improving the working efficiency of the printing apparatus.

[0036] In the above embodiments, the end of the paper roll 3 is processed to allow direct traction, whereas normally the end of the paper roll 3 is used for fixing, meaning that the paper roll 3 cannot be directly pulled when it reaches the last section. In another embodiment provided by the present invention, a connecting part 4 is fixed on the main body 1, a traction channel 5 is constructed on the connecting part 4, and a cutter 6 is slidably connected to the connecting part 4. Specifically, the connecting part 4 is arranged along the axial direction of the feeding roller 2, and its two ends are respectively fixed to the two side plates of the main body 1. The connecting part 4 is located downstream of the two sets of traction components. The traction channel 5 is open at one end near the two sets of traction components so that the rolls of paper 3 pulled by the two sets of traction components can pass through the traction channel 5. That is, the rolls of paper 3 pulled by the traction components will be transported to the printing mechanism through the traction channel 5. The cutter 6 is located on the side of the connecting part 4 near the traction components. The end of the cutter 6 is fixed with a drive block 7. The connecting part 4 is provided with a first linear drive mechanism, such as a cylinder 8 or a hydraulic rod. The first linear drive mechanism is fixed on the main body 1 and its output end is fixed to the drive block 7 so that the drive block 7 and the cutter 6 can slide on the connecting part 4 through the first linear drive mechanism. The drive block 7 and the connecting part 4 are slidably connected. The connection method can be a chute or slide rail structure, or it can be directly driven by the first linear drive mechanism to move (slide) on the connecting part 4. The sliding direction of the drive block 7 and the cutter 6 is perpendicular to the conveying direction of the roll paper 3 in its section, so as to cut the roll paper 3 when the cutter 6 slides. When the device is running, a set of traction components is pulling a set of roll paper 3 to move in the traction channel 5, while the end of another set of roll paper 3 is in the traction channel 5 and is in a waiting state. When the set of roll paper 3 being pulled is about to be used up, the first linear drive mechanism drives the cutter 6 to move along the connecting part 4 to cut the end of the two sets of roll paper 3. Then, the alternating traction mechanism switches to another set of traction components to pull the roll paper 3 to be pulled, so that the two sets of roll paper 3 can be alternately and continuously conveyed to the printing mechanism.

[0037] It should be noted that two waste sections are generated after cutting. One end of the waste section is connected to the feed roller 2, and the other end is located in the traction channel 5. Both waste sections will fall under the action of gravity and will not affect the normal conveying of the roll paper 3. In this embodiment, after the cutter 6 cuts the two sets of roll paper 3, the upstream set of roll paper 3 is pulled by a set of traction components, and the downstream set of roll paper 3 is conveyed by other structures of the printing device, such as the conveying structure at the printing mechanism. This is prior art and will not be described in detail.

[0038] In the above embodiment, after the cutter 6 cuts, there is no connection between the two sections of the traction-conveyed paper roll 3, that is, the two sections of paper roll 3 are always in a disconnected state during subsequent conveying, which can easily lead to conveying discontinuity. Preferably, an adsorption plate 9 is slidably connected to the main body 1. Specifically, a second linear drive mechanism, such as a cylinder or hydraulic rod 10, is provided on the main body 1. The second linear drive mechanism is fixed on the main body 1 and its output end is fixed to the adsorption plate 9, so that the adsorption plate 9 can be driven to slide on the main body 1. The adsorption plate 9 can be slidably connected to the main body 1 by a slide groove or slide rail structure, or it can be directly driven by the second linear drive mechanism to move (slide) on the main body 1. The sliding direction of the adsorption plate 9 is perpendicular to the conveying direction of the section of paper roll 3 it is located in, so that it moves closer to or away from the paper roll 3 when it slides. Two sets of adsorption plates 9 and the second linear drive mechanism are symmetrically arranged. A vacuum suction cup structure (vacuum suction cup) is provided on the side of the adsorption plates 9 closest to the paper roll 3. (The structure is existing technology and will not be described in detail here) to adsorb adhesive substances such as tape on the side of the adsorption plate 9 near the roll paper 3; after the cutter 6 cuts the two sets of roll paper 3, both sets of roll paper 3 are pulled to continue to be conveyed. When the two sets of roll paper 3 move out of the traction channel 5, they are connected end to end until the end of the two sets of roll paper 3 moves to the position of the adsorption plate 9. At this time, the second linear drive mechanism runs and drives the two sets of adsorption plates 9 to approach the roll paper 3 at the same time. Thus, the tape is adhered to the end of the two sets of roll paper 3 through the adsorption plates 9. Since there are two sets of adsorption plates 9, tape is adhered to both sides of the two sets of roll paper 3, so that the end of the two sets of roll paper 3 is tightly connected together, thereby ensuring the continuity of the conveying of the roll paper 3.

[0039] In the above embodiment, the cutter 6 operates synchronously with the traction mechanism to continuously convey the roll paper 3 without stopping the machine. Obviously, the cutter 6 cuts the two sets of roll paper 3 at different times. That is, after one set of roll paper 3 is cut and continues to be conveyed, the other set of roll paper 3 has not yet been cut. This will cause the beginning and end of the two sets of roll paper 3 to not be tightly connected, affecting the adhesive bonding effect. Furthermore, a conveying roller 11 and two drive rollers 12 are rotatably connected to the main body 1, and an adjusting roller 13 is slidably connected to the main body 1. Specifically, two drive rollers 12 are located above the connecting part 4, and both drive rollers 12 are rotatably connected to the main body 1. A power source (such as a motor structure) can be provided on the main body 1 to drive the two drive rollers 12 to rotate synchronously and in opposite directions, thereby driving the roll paper 3 to be conveyed through the two drive rollers 12. The two drive rollers 12 respectively abut against both sides of the roll paper 3. The two drive rollers 12 do not need to be equipped with a power source. When the subsequent mechanism drives the roll paper 3 to move, the movement of the roll paper 3 can passively drive the two drive rollers 12 to rotate synchronously and in opposite directions. A vertical groove is constructed on the main body 1, and a slider 14 is slidably connected in the groove. An adjusting roller 13 is rotatably connected to the slider 14, that is, the adjusting roller 13 is slidably connected to the main body 1 through the slider 14. A third linear drive mechanism is provided on the main body 1 to drive the slider 14. The third linear drive mechanism, which slides along the chute, can be a structure such as an electric push rod found in existing technology (not shown, and will not be described in detail here). The purpose of this arrangement is that, during use, the roll of paper 3 sequentially passes through the traction mechanism, traction channel 5, suction plate 9, drive roller 12, adjusting roller 13, and conveying roller 11. When the two sets of rolls of paper 3 are alternately conveyed (i.e., when the ends of the two sets of rolls of paper 3 are cut), the third linear drive mechanism drives the slider 14 to slide along the chute. Simultaneously, the two drive rollers 12 and the traction assembly stop operating (if a power source is provided at the drive roller 12, the power source stops operating; if no power source is provided at the drive roller 12, the roll of paper 3 at the drive roller 12 is not tractioned, causing the drive roller 12 to stop passively), thus causing the adjusting roller 13 to move in the direction of the drive roller 12 and the conveying roller 11 (e.g., ...). Figure 2 As shown, the adjusting roller 13 moves upward. During this process, the subsequent mechanism pulls the roll paper 3 at the conveying roller 11 and the adjusting roller 13, that is, the roll paper 3 at the drive roller 12 and the traction mechanism is not pulled, so that the two sets of roll paper 3 at the cutter 6 can be cut in a relatively static state. After the cutting is completed, the adjusting roller 13 is reset (that is, the adjusting roller 13 moves downward along the chute) and the drive roller 12 and the traction assembly resume operation, so that the two sets of roll paper 3 at the cutter 6 continue to be conveyed. The advantage of this setting is that when the two sets of roll paper 3 are conveyed alternately, the operation of the adjusting roller 13 and other structures can keep the roll paper 3 at the cutter 6 in a relatively static state, so that the two sets of roll paper 3 are cut when they are static, and are simultaneously pulled and conveyed after cutting, so that the beginning and end ends of the two sets of rolls can be tightly connected together, which is convenient for subsequent adhesive tape bonding.

[0040] In another embodiment of the present invention, two compression plates 15 are provided in the traction channel 5, and a first elastic member 16 is provided between the compression plate 15 and the connecting part 4. Specifically, the connecting part 4 has through grooves at both ends that communicate with the traction channel 5. The extrusion plate 15 is located in both the traction channel 5 and the through grooves, with the end of the extrusion plate 15 extending out of the through groove. Two sets of first elastic members 16 are symmetrically arranged in the traction channel 5. The first elastic members 16 can be springs or elastic telescopic rods. The ends of the two sets of first elastic members 16 that are close to each other are limited to the inner wall of the traction channel 5, and the other ends are respectively limited to the two extrusion plates 15. This forces the two extrusion plates 15 to move away from each other through the two sets of first elastic members 16, thereby extruding the two sets of paper rolls 3 through the two extrusion plates 15 to restrict the paper rolls 3 to the inner wall of the traction channel 5. The advantage is that by setting the first elastic members 16 and the extrusion plates 15, the two sets of paper rolls 3 can be extruded and pressed together to restrict the paper rolls 3 to the traction channel 5, which facilitates the cutting operation with the cutter 6 and minimizes the displacement of the paper rolls 3 during cutting.

[0041] Two extrusion plates 15 simultaneously extrude two sets of paper rolls 3. One set of paper rolls 3 is in a conveying state, and the corresponding extrusion plate 15 will obstruct the conveying of the paper rolls 3. Preferably, an abutment rod 17 is hinged to the connecting part 4, and a torsion spring is provided between the abutment rod 17 and the connecting part 4. A stop block 18 is constructed on the connecting part 4, and a protrusion 19 is constructed on the cutter 6. Specifically, two sets of abutment rods 17 are symmetrically arranged on one end of the connecting part 4. The two sets of abutment rods 17 are respectively located on both sides of the through groove, and the ends of the two sets of abutment rods 17 that are close to each other abut against the side walls of the two extrusion plates 15 that are far apart from each other (the ends of the abutment rods 17 abut against the parts of the extrusion plates 15 that extend out of the through groove). The torsion spring can force the ends of the abutment rods 17 away from the extrusion plates 15 and fit against the stop block 18; the end of the abutment rod 17 that is far away from the extrusion plates 15 extends to the travel of the protrusion 19; Figure 4As shown, the paper roll 3 on the left side of the connecting part 4 is in the conveying state and is about to switch to the paper roll 3 on the right side for continued conveying. At this time, the drive block 7 and the cutter 6 are on the left side of the connecting part 4, and can abut the end of the left abutment rod 17 through the protrusion 19, so that the left abutment rod 17 overcomes the elastic force of the torsion spring and abuts the extrusion plate 15, thereby forcing the left extrusion plate 15 to move towards the middle position of the through groove, thereby relieving the abutment of the left extrusion plate 15 against the left paper roll 3, and minimizing the impact on the conveying of the left paper roll 3. Obstruction; when the cutter 6 moves to the right to cut the two sets of paper rolls 3, the protrusion 19 releases its contact with the left abutment rod 17, allowing the left pressure plate 15 to resume its pressure on the left paper roll 3, thus enabling the cutter 6 to cooperate with the two pressure plates 15 and the connecting part 4 to cut the two sets of paper rolls 3; after cutting, the cutter 6 moves to the rear and abuts the end of the right abutment rod 17, thereby releasing the right pressure plate 15 from its contact with the right paper roll 3, minimizing impact on the feeding of the right paper roll 3. This arrangement allows for alternating contact between the two sets of paper rolls 3, and simultaneous contact during cutting, adapting to the cutting process.

[0042] As an alternative to the above-mentioned two rollers rotating synchronously and in opposite directions to convey the roll of paper 3, preferably, the traction assembly includes a drive roller 20 rotatably connected to the main body 1 and a driven roller 21 slidably connected to the main body 1. A movable block 22 is slidably connected to the main body 1, and both driven rollers 21 are rotatably connected to the movable block 22. Specifically, both ends of the connecting part 4 are fixed with brackets 23, which are fixed to the main body 1. That is, the connecting part 4 is fixed to the main body 1 via brackets 23. Both active roller shafts 20 are rotatably connected to the brackets 23, meaning the active roller shafts 20 are rotatably connected to the brackets 23 of the main body 1. A power source (such as a motor) can be installed on the brackets 23 to drive the two active roller shafts 20 to rotate synchronously and in opposite directions. When the active roller shafts 20 and driven roller shafts 21 collide with the roll paper 3, the rotation of the active roller shafts 20 can drive the roll paper 3 to be conveyed and drive the driven roller shaft 21 to rotate. The brackets 23 have movable grooves, and movable blocks 22 are slidably connected within these grooves. That is, the driven roller shaft 21 is slidably connected to the brackets 23 of the main body 1 via movable blocks 22. The driving force for the movable blocks 22 to slide along the movable grooves can be a structure such as an electric push rod from the prior art. Figure 5As shown, when the movable block 22 slides to the left, the driven roller 21 on the left cooperates with the driving roller 20 on the left to abut and pull the roll of paper 3 on the left. Conversely, when the movable block 22 slides to the right, the driven roller 21 on the right cooperates with the driving roller 20 on the right to abut and pull the roll of paper 3 on the right. With this configuration, the operation of the alternating traction mechanism can be controlled by controlling the position of the movable block 22 with an electric push rod. That is, when the movable block 22 moves to one side, the traction component on that side can be controlled to run while the traction component on the other side stops running (only the driving roller 20 rotates on the other side, and there is a certain distance between the driving roller 20 and the driven roller 21, which makes it impossible to pull the roll of paper 3 on the other side, and the roll of paper 3 on the other side is also abutted by the squeeze plate 15). This is used to cooperate with the conveying of the roll of paper 3 to realize the function of the alternating traction mechanism.

[0043] As an alternative to the above-mentioned motor structure driving the two active roller shafts 20 to rotate synchronously and in opposite directions, preferably, the two drive rollers 12 are respectively connected to the two active roller shafts 20 via transmission. Specifically, each of the two drive shafts has a drive wheel 24 fixed at its end, and the two drive wheels 24 are staggered in the axial direction of the drive shaft to minimize interference; each of the two active roller shafts 20 has a transmission wheel 25 fixed at its end, and the positions of the two transmission wheels 25 correspond to the positions of the two drive wheels 24 respectively. A transmission belt 26 is sleeved between one drive wheel 24 and one transmission wheel 25 on the same side, so that when the drive roller 12 rotates, it drives the corresponding active roller shaft 20 to rotate. Since the two drive wheels 24 rotate synchronously and in opposite directions, the two active roller shafts 20 rotate synchronously and in opposite directions after being driven. In the above embodiment, the two drive rollers 12 are directly or indirectly driven to rotate synchronously, while in this embodiment, the two active rollers are connected to the two drive rollers 12 via transmission, and the power of the drive rollers 12 is used to passively drive the two sets of traction components to run.

[0044] In another embodiment of the present invention, as an alternative to the above-mentioned electric push rod driving the movable block 22 to slide along the movable groove, the driving block 7 is further provided with an L-shaped rod 27, the movable block 22 is provided with a connecting plate 28, the connecting plate 28 is provided with a connecting groove 29, the L-shaped rod 27 is slidably connected in the connecting groove 29, the bracket 23 is slidably connected with two limiting blocks 30, a second elastic element 31 is provided between the limiting block 30 and the bracket 23, and the connecting plate 28 is provided with two limiting holes 32. Specifically, the bracket 23 has two symmetrically constructed limiting grooves, each containing a limiting block 30 slidably connected to it. The L-shaped rod 27 includes a horizontal part and a vertical part. The horizontal part is fixed to the driving block 7 and slidably connected to the connecting groove 29. The vertical part is in contact with the side wall of the connecting plate 28. The end of the vertical part away from the horizontal part and the tops of the two limiting blocks 30 are both constructed with inclined surfaces. The second elastic element 31 can be a spring or elastic telescopic rod from the prior art, used to force the limiting block 30 out of the limiting groove. The thickness of the limiting block 30 is greater than the thickness of the limiting hole 32, so that after the limiting block 30 is inserted into the corresponding limiting hole 32, a portion still protrudes from the connecting plate 28. That is, after the limiting block 30 is inserted into the limiting hole 32, the inclined surface of the L-shaped rod 27 can also abut against the inclined surface of the limiting block 30, forcing the limiting block 30 to retract into the limiting groove. The purpose of this arrangement is that, Figure 7As shown, when the cutter 6 is on the left side of the bracket 23, the movable block 22 and the two driven roller shafts 21 are both located on the left side of the movable groove. At this time, the limiting hole 32 on the right side of the connecting plate 28 corresponds to the position of the limiting block 30 on the right side, so that the limiting block 30 on the right side can be inserted into the limiting hole 32 on the right side under the action of the second elastic member 31, thereby limiting the position of the bracket 23 and the connecting plate 28, thus limiting the movable block 22 and the two driven roller shafts 21 to the left side of the movable groove. When the driving block 7 drives the cutter 6 to move to the right to cut, the L-shaped rod 27 moves to the right end of the connecting groove 29 with the driving block 7. The inclined surface of the end of the L-shaped rod 27 will be perpendicular to the right limiting block 30. The inclined surface of 0 abuts against the wall, forcing the right-side limiting block 30 to overcome the elastic force of the second elastic member 31 and retract into the limiting groove. This releases the restriction on the movable block 22, allowing the L-shaped rod 27 to continue moving with the drive block 7 and drive the connecting plate 28 and the movable block 22 to move, thereby moving the movable block 22 to the right side of the movable groove. When the movable block 22 moves to the right side of the movable groove, the cutter 6 completes the cutting of the two sets of roll paper 3 and the protrusion 19 abuts against the corresponding abutting rod 17. At this time, the left-side limiting block 30 corresponds to the left-side limiting hole 32 and is inserted into the left-side limiting hole 32, thus restricting the movable block 22 to the right side of the movable groove. The advantage is that the operation of the drive block 7 and the cutter 6 can passively drive the movable block 22 to move, so as to switch the position of the two driven roller shafts 21. When switching the position of the movable block 22, the structure such as the L-shaped rod 27 can contact the limiting block 30 to restrict the movable block 22. After switching the position of the movable block 22, the limiting block 30 structure can passively restrict the position of the movable block 22, so as to avoid the position of the driven roller shaft 21 from shifting during the conveying of the roll paper 3.

[0045] The present invention also provides a printing method for premium packaging, which performs printing operations based on the printing apparatus described above, such that after the roll paper 3 on one set of feed rollers 2 is used up, another set of traction components can pull the roll paper 3 on another set of feed rollers 2, thereby realizing the alternating conveying of the two sets of roll paper 3 without stopping the machine, thereby improving the working efficiency of the printing apparatus.

[0046] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A printing apparatus for premium packaging, comprising a main body, characterized in that, The main body is provided with: The feeding rollers are provided in two sets, and each set of the feeding rollers is fitted with a roll of paper. An alternating traction mechanism includes two sets of traction components that operate alternately. The two sets of traction components are used to traction two sets of paper rolls respectively. After one set of traction components completes traction of one set of paper rolls, the other set of traction components tractions the other set of paper rolls. A connecting part is fixed on the main body, a traction channel is constructed on the connecting part, and a cutter is slidably connected to the connecting part; The main body is rotatably connected to a conveying roller and two drive rollers, and is slidably connected to an adjusting roller. Two compression plates are provided in the traction channel, and a first elastic element is provided between the compression plates and the connecting part; A contact rod is hinged to the connecting part, a torsion spring is provided between the contact rod and the connecting part, a stop is constructed on the connecting part, and a protrusion is constructed on the cutter; The traction assembly includes a drive roller shaft rotatably connected to the main body and a driven roller shaft slidably connected to the main body; A movable block is slidably connected to the main body, and both driven roller shafts are rotatably connected to the movable block; brackets are fixed at both ends of the connecting part, and the brackets are fixed to the main body; The two drive rollers are respectively connected to the two drive roller shafts via a transmission. The cutter is located on the side of the connecting part closer to the traction component. A drive block is fixed to the end of the cutter. A first linear drive mechanism is provided on the connecting part. The first linear drive mechanism is fixed on the main body and its output end is fixed to the drive block, so that the drive block and the cutter can slide on the connecting part through the first linear drive mechanism.

2. The printing apparatus for premium packaging according to claim 1, characterized in that, An adsorption plate is slidably connected to the main body.

3. A printing method for premium packaging, based on the printing apparatus of any one of claims 1-2, characterized in that, Two sets of feed rollers are set up so that after the paper roll of one set of feed rollers has been pulled, the paper roll of the other set of feed rollers is switched to be pulled.

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