Alignment device

Abstract

The utility model discloses an aligning device, which is used for aligning and overlapping first paper and second paper, and comprises a first conveying unit, a second conveying unit, a third conveying unit and a third conveying unit, the second conveying unit is used for conveying second paper to the discharging end of the first conveying unit, so that the second paper covers the first paper; and the paper pressing unit comprises a paper pushing assembly, the paper pushing assembly is arranged below the first conveying unit, the paper pushing assembly can stretch into a conveying path of the first conveying unit, and the paper pushing assembly is used for pushing the first paper to be pressed against the alignment baffle. Alignment precision can be improved, and linkage alignment of upper paper and lower paper is achieved.

Description

Technical Field

[0001] This utility model relates to the field of paper processing equipment technology, and in particular to an alignment device. Background Technology

[0002] In the fields of printing, packaging, binding, and automated paper processing, precise alignment and stacking of multiple sheets of paper are often required to ensure the smooth progress of subsequent processes (such as gluing, cutting, and stacking). Traditional paper alignment methods usually rely on manual operation or simple mechanical limiting structures, which are not only inefficient but also difficult to guarantee alignment accuracy. Especially in high-speed continuous production processes, problems such as paper misalignment and displacement are prone to occur, affecting product quality and equipment operational stability. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an alignment device that can improve alignment accuracy and achieve simultaneous alignment of upper and lower papers.

[0004] An alignment device according to a first aspect of the present invention is used to align and stack a first sheet of paper and a second sheet of paper, comprising:

[0005] The first conveying unit is used to convey the first sheet of paper, and the discharge end of the first conveying unit is provided with an alignment baffle.

[0006] The second conveying unit is used to convey the second sheet of paper to the discharge end of the first conveying unit so that the second sheet of paper covers the first sheet of paper.

[0007] The paper pressing unit includes a paper pushing assembly disposed below the first conveying unit. The paper pushing assembly can extend into the conveying path of the first conveying unit and is used to push a first sheet of paper against the alignment baffle.

[0008] The alignment device according to the embodiment of this utility model has at least the following beneficial effects: by using the alignment baffle set at the discharge end of the first conveying unit, and in conjunction with the paper pushing component that can extend into the conveying path below, the first paper can be pushed from the bottom to fit tightly against the alignment baffle, effectively eliminating the offset of the paper during the conveying process and significantly improving the alignment accuracy; the paper pushing component is set below the first conveying unit to avoid direct contact with the upper surface of the paper, so as not to affect the subsequent stacking of the second paper, and is applicable to papers of different thicknesses or surface conditions, improving the versatility and operational stability of the device; the second conveying unit accurately conveys the second paper onto the first paper to form an upper and lower stacked structure, and combined with the action logic of the paper pressing unit, ensures that the upper and lower papers are synchronously positioned at the alignment position, avoiding misalignment.

[0009] According to some embodiments of this utility model, the paper pushing assembly includes a pressing plate and a spring disposed on the back side. The pressing plate is movable parallel to the first paper conveying direction, and the spring is configured to be in a compressed state after the pressing plate contacts the paper and abuts against the alignment baffle. The spring entering a compressed state after the pressing plate contacts the paper and aligns with the baffle effectively buffers rigid impacts, preventing paper deformation or damage due to excessive pressure. This is particularly suitable for aligning thin paper or materials with fragile surfaces. The spring structure can automatically compensate for minor deviations in paper position or thickness fluctuations, ensuring that the pressing plate always adheres to the paper edge, further improving the stability and reliability of alignment.

[0010] According to some embodiments of this utility model, the paper pushing assembly further includes a linear motion module and a first telescopic cylinder. The linear motion module extends along the conveying direction of the first paper, and the first telescopic cylinder is slidably mounted on the linear motion module with its telescopic end facing upwards. The pressing plate is fixedly mounted on the top of the first telescopic cylinder. The linear motion module provides a stable guide path for the first telescopic cylinder and the pressing plate, ensuring that the paper pushing action runs along a predetermined trajectory, avoiding deviation, and significantly improving alignment accuracy and repeatability.

[0011] According to some embodiments of this utility model, the first conveying unit includes a first conveyor belt and a second conveyor belt arranged vertically opposite each other. During conveying, the first sheet of paper is held between the first and second conveyor belts. At least one working surface of the first and second conveyor belts is provided with an anti-stick coating. The clamping force formed by the upper and lower conveyor belts effectively prevents the paper from shifting, slipping, or warping during conveying. This is particularly suitable for the reliable conveying of thin or smooth paper at high speeds. The anti-stick coating prevents adhesive from the paper from adhering to the conveyor belt.

[0012] According to some embodiments of this utility model, the distance between the first conveyor belt and the second conveyor belt gradually decreases along the conveying direction to form a tapered clamping area for clamping the first sheet of paper. This avoids paper wrinkling, slippage, or jamming caused by sudden compression, and is especially suitable for papers of different thicknesses or with large differences in rigidity. It helps to eliminate any lateral shift that may occur before the paper enters the alignment station, and improves its centering and stability in the conveying path.

[0013] According to some embodiments of this utility model, the feeding end of the first conveying unit is provided with a gluing assembly. The gluing assembly includes a gluing roller and an outer glue box. The outer glue box is connected to the inside of the gluing roller through a glue guiding channel for supplying glue to the gluing roller. The gluing roller is rotatably disposed above the first paper entry channel for applying glue to the paper surface. The gluing roller uses a rotating method to perform contact gluing on the paper. Combined with the glue supply system formed by the outer glue box and the glue guiding channel, it can ensure uniform glue distribution and stable coating amount, making it suitable for high-speed continuous operation scenarios.

[0014] According to some embodiments of this utility model, a second telescopic cylinder is provided at the bottom of the alignment baffle. The second telescopic cylinder is used to drive the alignment baffle to reciprocate vertically. A pressure claw is provided at the top of the alignment baffle, extending towards the conveying plane of the first paper. When the alignment baffle descends to its lowest position, the pressure claw contacts and presses against the upper surface of the first paper. By applying appropriate pressure with the pressure claw, displacement of the paper is prevented during the subsequent stacking of the second paper, thereby improving alignment stability and stacking accuracy.

[0015] According to some embodiments of this utility model, the pressure claw is provided with an anti-stick coating. The anti-stick coating can significantly reduce the adhesion between the pressure claw and the paper surface, preventing the paper from sticking to the pressure claw after pressing, ensuring that the paper is smoothly conveyed to the subsequent workstation, and reducing manual intervention and downtime for cleaning.

[0016] According to some embodiments of this utility model, the second conveying unit includes a third conveyor belt, a trigger photoelectric sensor, and a lateral conveying component. The trigger photoelectric sensor is located at the end of the third conveyor belt, and the lateral conveying component is movably disposed on the discharge end side of the third conveyor belt and signal-connected to the trigger photoelectric sensor. The lateral conveying component is configured to transfer the second sheet of paper from the discharge end of the third conveyor belt to the discharge end of the first conveying unit in response to the trigger photoelectric sensor being activated by the second sheet of paper. By real-time detection of the second sheet's positioning status by the trigger photoelectric sensor, it is ensured that the lateral conveying component performs the transfer action only after the paper is accurately positioned, thereby improving the accuracy and automation level of the system response.

[0017] According to some embodiments of this utility model, the paper pressing unit further includes an alignment component. The alignment component includes a first alignment sensor and a second alignment sensor spaced apart vertically. The first alignment sensor is positioned corresponding to the first paper conveying height and is used to detect the alignment position of the first paper. The second alignment sensor is positioned corresponding to the second paper conveying height and is used to detect the overlapping position of the second paper. By using two sensors positioned at different heights, the alignment status of the first and second papers can be monitored simultaneously, ensuring that both are in the correct position before overlapping. This avoids the generation of overall defective products due to misalignment of a single sheet. The precise positioning function of the alignment sensor can effectively reduce errors caused by manual visual judgment, ensuring consistent alignment quality for each batch of products and improving the product qualification rate.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 This is a schematic diagram of the alignment device according to an embodiment of the present invention;

[0021] Figure 2 This is an internal schematic diagram of the alignment device according to an embodiment of the present invention;

[0022] Figure 3 This is one of the schematic diagrams of the first conveying unit according to an embodiment of the present utility model;

[0023] Figure 4 This is a second schematic diagram of the first conveying unit according to an embodiment of the present utility model;

[0024] Figure 5 This is a schematic diagram of the paper pressing unit according to an embodiment of the present utility model;

[0025] Figure 6 This is a schematic diagram of the alignment component according to an embodiment of the present invention.

[0026] Reference numerals: First conveying unit 100; Second conveying unit 110; Lateral transport component 120; Glue application assembly 130; First conveyor belt 140; Second conveyor belt 150; Paper pushing assembly 160; Alignment baffle 170; Pressure claw 180; Pushing plate 190; Linear movement module 200; First telescopic cylinder 210; First alignment sensor 220; Second alignment sensor 230. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of these terms in this utility model based on the specific content of the technical solution. In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. In the description of this specification, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] Reference Figures 1 to 6For aligning and stacking the first and second sheets of paper, including:

[0032] The first conveying unit 100 is used to convey the first paper, and the discharge end of the first conveying unit 100 is provided with an alignment baffle 170.

[0033] The second conveying unit 110 is used to convey the second sheet of paper to the discharge end of the first conveying unit 100 so that the second sheet of paper covers the first sheet of paper.

[0034] The paper pressing unit includes a paper pushing assembly 160, which is disposed below the first conveying unit 100. The paper pushing assembly 160 can extend into the conveying path of the first conveying unit 100 and is used to push the first paper against the alignment baffle 170.

[0035] By using the alignment baffle 170 located at the discharge end of the first conveying unit 100, and in conjunction with the paper pusher assembly 160 extending into the conveying path below, the first sheet of paper can be pushed from the bottom to press tightly against the alignment baffle 170, effectively eliminating the offset of the paper during conveying and significantly improving the alignment accuracy. The paper pusher assembly 160 is located below the first conveying unit 100, avoiding direct contact with the upper surface of the paper, thus not affecting the subsequent stacking of the second sheet of paper. It is also suitable for paper of different thicknesses or surface conditions, improving the versatility and operational stability of the device. The second conveying unit 110 accurately conveys the second sheet of paper onto the first sheet of paper, forming an upper and lower stacked structure. Combined with the action logic of the paper pressing unit, it ensures that the upper and lower sheets of paper are synchronously positioned at the alignment position, avoiding misalignment.

[0036] The paper pusher assembly 160 includes a pusher plate 190 and a spring disposed on the back side. The pusher plate 190 is movable parallel to the first paper transport direction. The spring is configured to be in a compressed state after the pusher plate 190 contacts the paper and abuts against the alignment baffle 170. The spring's compression after the pusher plate 190 contacts the paper and the alignment baffle 170 effectively buffers rigid impacts, preventing paper deformation or damage due to overpressure. It is particularly suitable for alignment operations of thin paper or materials with fragile surfaces. The spring structure can automatically compensate for minor deviations in paper position or thickness fluctuations, ensuring that the pusher plate 190 always fits against the paper edge, further improving the stability and reliability of alignment.

[0037] The first sheet of paper is held and conveyed to the discharge end by the upper and lower conveyor belts, stopping or moving slowly near the alignment baffle 170. The control system triggers the paper pushing assembly 160, and the push plate 190 moves forward parallel to the paper conveying direction under the push of the drive device, gradually approaching the edge of the paper. After the push plate 190 contacts the first sheet of paper, it continues to apply a pushing force, driving the paper towards the alignment baffle 170 until the edge of the paper is tightly attached to the baffle. At this time, the spring on the back of the push plate 190 begins to be compressed. In the compressed state, the spring continuously provides a restoring force to the push plate 190, keeping it always in contact with the edge of the paper. When there are fluctuations in paper thickness or slight deviations in position, the spring automatically compensates through its own deformation, ensuring that the paper is stably attached to the alignment baffle 170 and avoiding paper deformation or misalignment caused by rigid impact. After the alignment operation is completed, the drive device drives the push plate 190 to retract, and the spring returns to its original state, preparing for the next paper pushing action.

[0038] The paper pushing assembly 160 also includes a linear motion module 200 and a first telescopic cylinder 210. The linear motion module 200 extends along the conveying direction of the first paper. The first telescopic cylinder 210 is slidably mounted on the linear motion module 200 with its telescopic end facing upwards. A pressing plate 190 is fixedly mounted on the top of the first telescopic cylinder 210. The linear motion module 200 provides a stable guide path for the first telescopic cylinder 210 and the pressing plate 190, ensuring that the paper pushing action runs along a predetermined trajectory, avoiding deviation, and significantly improving alignment accuracy and repeatability.

[0039] Once the control system detects that the first sheet of paper has reached the alignment station, it drives the first telescopic cylinder 210 to slide along the linear movement module 200 to a predetermined position. This module provides a precise guide path for the first telescopic cylinder 210, ensuring that its movement trajectory is consistent with the alignment direction of the paper edge. The first telescopic cylinder 210 is activated, its telescopic end extends upward, driving the push plate 190 to rise and contact the bottom of the first sheet of paper. It then continues to push the paper towards the alignment baffle 170, causing its edge to adhere to the baffle and complete the alignment. After the alignment operation is completed, the first telescopic cylinder 210 retracts, the push plate 190 descends and disengages from the paper surface, and the cylinder returns to its origin along the linear module.

[0040] The first conveying unit 100 includes a first conveyor belt 140 and a second conveyor belt 150 arranged vertically opposite each other. During conveying, the first sheet of paper is held between the first conveyor belt 140 and the second conveyor belt 150. At least one working surface of the first conveyor belt 140 and the second conveyor belt 150 is provided with an anti-stick coating. The clamping force formed by the upper and lower conveyor belts effectively prevents the paper from shifting, slipping, or warping during conveying. This is particularly suitable for the reliable conveying of thin or smooth paper at high speeds. The anti-stick coating also prevents adhesive from adhering to the conveyor belt.

[0041] The first conveyor belt 140 (upper belt) and the second conveyor belt 150 (lower belt) operate synchronously under the drive of the drive device, applying appropriate clamping force to the paper to ensure stable movement between them. The working surfaces of the first conveyor belt 140 and / or the second conveyor belt 150 are provided with an anti-stick coating, which effectively reduces the adhesion between the paper and the conveyor belt during paper transport, preventing paper tearing, paper jams, or adhesion problems during machine stoppages caused by adhesion.

[0042] The distance between the first conveyor belt 140 and the second conveyor belt 150 gradually decreases along the conveying direction to form a tapered clamping area for clamping the first sheet of paper. This avoids paper wrinkling, slippage, or jamming caused by sudden clamping, and is especially suitable for papers of different thicknesses or with large differences in rigidity. It helps to eliminate any lateral shift that may occur before the paper enters the alignment station, and improves its centering and stability in the conveying path.

[0043] The first sheet of paper enters the space between the upper and lower conveyor belts from the feed end. Initially, the conveyor belts are spaced relatively wide, facilitating smooth paper feeding. As the paper is conveyed forward, the distance between the upper and lower conveyor belts gradually decreases, and the paper begins to experience a slight clamping force, serving as a guide and initial positioning element. Later in the clamping area, the distance narrows further, and the upper and lower conveyor belts apply an increasingly stronger clamping force to the paper, effectively preventing it from curling up.

[0044] The feeding end of the first conveying unit 100 is equipped with a glue coating assembly 130, which includes a glue coating roller and an outer glue box. The outer glue box is connected to the inside of the glue coating roller through a glue guiding channel for supplying glue to the glue coating roller. The glue coating roller is rotatably mounted above the first paper entry channel for applying glue to the paper surface. The glue coating roller uses a rotating method to apply glue to the paper in contact. The glue supply system formed by the outer glue box and the glue guiding channel can ensure uniform glue distribution and stable coating amount, making it suitable for high-speed continuous operation scenarios.

[0045] When the first sheet of paper enters the gluing area, the gluing roller rotates under the drive of the drive device, so that its surface contacts the upper surface of the paper and the glue is evenly applied to the surface of the paper.

[0046] A second telescopic cylinder is provided at the bottom of the alignment baffle 170. The second telescopic cylinder is used to drive the alignment baffle 170 to reciprocate vertically. A pressure claw 180 is provided at the top of the alignment baffle 170. The pressure claw 180 extends toward the feed plane of the first paper. When the alignment baffle 170 descends to its lowest position, the pressure claw 180 contacts and presses against the upper surface of the first paper. By applying appropriate pressure with the pressure claw 180, the paper is prevented from shifting during the subsequent stacking of the second paper, thereby improving alignment stability and stacking accuracy.

[0047] After the paper is pushed, the second telescopic cylinder drives the alignment baffle 170 to descend, causing the top pressure claw 180 to contact and press against the upper surface of the first paper, further fixing the paper position and preventing displacement during subsequent operations. The second paper is transferred from the third conveyor belt onto the first paper by the transverse conveying member 120, and is precisely stacked and glued together under its own gravity or the action of the auxiliary pressing device.

[0048] The pressure claw 180 is equipped with an anti-stick coating. This coating significantly reduces the adhesion between the pressure claw 180 and the paper surface, preventing paper from sticking to the pressure claw 180 after clamping. This ensures smooth paper delivery to subsequent workstations, reducing manual intervention and downtime for cleaning. The anti-stick coating also significantly reduces the adhesion between the pressure claw 180 and the paper, preventing paper tearing, wrinkling, or paper jams.

[0049] The second conveying unit 110 includes a third conveyor belt, a trigger photoelectric sensor, and a lateral conveying component 120. The trigger photoelectric sensor is located at the end of the third conveyor belt. The lateral conveying component 120 is movably disposed on the discharge end side of the third conveyor belt and is signal-connected to the trigger photoelectric sensor. The lateral conveying component 120 is configured to transfer the second sheet of paper from the discharge end of the third conveyor belt to the discharge end of the first conveying unit 100 in response to the trigger photoelectric sensor being activated by the second sheet of paper. By detecting the arrival status of the second sheet of paper in real time through the trigger photoelectric sensor, it is ensured that the lateral conveying component 120 performs the transfer action only after the paper is accurately positioned, thereby improving the accuracy of the system response and the level of automation.

[0050] The photoelectric sensor detects the placement of the second sheet in real time, triggering the transfer action only after it is accurately positioned, thus avoiding accidental movement or empty grabbing and improving the overall system stability. Through a closed-loop control strategy combining sensor feedback and mechanical action, the paper transfer process is automatically judged and executed, reducing manual intervention and enhancing the equipment's intelligence level.

[0051] The paper pressing unit also includes an alignment component, which comprises a first alignment sensor 220 and a second alignment sensor 230 arranged vertically at intervals. The first alignment sensor 220 is positioned corresponding to the first paper feeding height and is used to detect the alignment position of the first paper. The second alignment sensor 230 is positioned corresponding to the second paper feeding height and is used to detect the overlapping position of the second paper. By using two sensors positioned at different heights, the alignment status of the first and second papers can be monitored simultaneously, ensuring that both are in the correct position before overlapping. This avoids the generation of overall defective products due to misalignment of a single sheet. The precise positioning function of the alignment sensors effectively reduces errors caused by manual visual judgment, ensuring consistent alignment quality for each batch of products and improving the product qualification rate.

[0052] In a preferred embodiment of the present invention, the first sheet is pushed to the alignment baffle 170 by the paper pusher assembly 160. This pushing action causes the first sheet to abut against the alignment baffle 170 along its length direction, completing the initial positioning. At this time, the length direction of the first sheet has been aligned.

[0053] Subsequently, the first alignment sensor 220, mounted on the paper pressing unit, detects the position of the first paper edge in the width direction. This sensor is located at a position corresponding to the conveying height of the first paper and can identify whether it is within a preset alignment area. If the sensor signal feedback is "in place," it indicates that the first paper has been accurately positioned in both dimensions, completing the overall alignment.

[0054] Meanwhile, the second sheet of paper is conveyed to the end of the third conveyor belt, and its arrival at the transfer start position is detected by a trigger photoelectric sensor. Once confirmed, the lateral conveying component 120 is activated, transferring the second sheet of paper from the discharge end of the third conveyor belt to above the first sheet. The second sheet of paper enters the detection area of ​​the second alignment sensor 230, which is positioned corresponding to the overlapping height of the second sheet of paper. This sensor determines whether it accurately covers the first sheet of paper and is within the predetermined overlapping area. If the sensor reports "in place," it indicates that the second sheet of paper has been positioned. The control system receives signals from the first alignment sensor 220 and the second alignment sensor 230 in real time. Only when both sensors report "alignment complete" will the system trigger the subsequent pressing operation, ensuring that the upper and lower sheets of paper are fully aligned before the pasting or fixing action is completed.

[0055] In some embodiments, by adjusting the installation position or detection parameters of the alignment sensor, the relative offset between the first and second sheets can be flexibly controlled, thereby achieving different forms of alignment effects, such as center alignment, left alignment, right alignment, or misalignment with a set spacing, further enhancing the flexible production capability of the equipment.

[0056] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An alignment device for aligning and stacking a first sheet of paper and a second sheet of paper, characterized in that, include: The first conveying unit is used to convey the first sheet of paper, and the discharge end of the first conveying unit is provided with an alignment baffle. The second conveying unit is used to convey the second sheet of paper to the discharge end of the first conveying unit so that the second sheet of paper covers the first sheet of paper. The paper pressing unit includes a paper pushing assembly disposed below the first conveying unit. The paper pushing assembly can extend into the conveying path of the first conveying unit and is used to push a first sheet of paper against the alignment baffle.

2. The alignment device according to claim 1, characterized in that, The paper pushing assembly includes a pressing plate and a spring disposed on the back side. The pressing plate is movable in a direction parallel to the first paper conveying direction, and the spring is configured to be in a compressed state after the pressing plate contacts the paper and abuts against the alignment baffle.

3. The alignment device according to claim 2, characterized in that, The paper pushing assembly also includes a linear motion module and a first telescopic cylinder. The linear motion module extends along the conveying direction of the first paper. The first telescopic cylinder is slidably mounted on the linear motion module with its telescopic end facing upward. The push plate is fixedly mounted on the top of the first telescopic cylinder.

4. The alignment device according to claim 1, characterized in that, The first conveying unit includes a first conveyor belt and a second conveyor belt arranged vertically opposite each other. The first paper is held between the first conveyor belt and the second conveyor belt during the conveying process. At least one working surface of the first conveyor belt and the second conveyor belt is provided with an anti-stick coating.

5. The alignment device according to claim 4, characterized in that, The distance between the first conveyor belt and the second conveyor belt gradually decreases along the conveying direction to form a tapered clamping area for clamping the first paper.

6. The alignment device according to claim 1, characterized in that, The feeding end of the first conveying unit is provided with a glue coating assembly, which includes a glue coating roller and an outer glue box. The outer glue box is connected to the inside of the glue coating roller through a glue guiding channel and is used to supply glue to the glue coating roller. The glue coating roller is rotatably disposed above the first paper entry channel and is used to apply glue to the paper surface.

7. The alignment device according to claim 1, characterized in that, The bottom of the alignment baffle is provided with a second telescopic cylinder, which is used to drive the alignment baffle to reciprocate in the vertical direction. The top of the alignment baffle is provided with a pressure claw, which extends toward the conveying plane of the first paper. When the alignment baffle is lowered to the lowest position, the pressure claw contacts and presses against the upper surface of the first paper.

8. The alignment device according to claim 7, characterized in that, The pressure claws are provided with an anti-stick coating.

9. The alignment device according to claim 1, characterized in that, The second conveying unit includes a third conveyor belt, a trigger photoelectric sensor, and a lateral conveying component. The trigger photoelectric sensor is located at the end of the third conveyor belt. The lateral conveying component is movably located on the discharge end side of the third conveyor belt and is signal-connected to the trigger photoelectric sensor. The lateral conveying component is configured to transfer the second sheet from the discharge end of the third conveyor belt to the discharge end of the first conveying unit in response to the trigger photoelectric sensor being triggered by the second sheet.

10. The alignment device according to claim 1, characterized in that, The paper pressing unit further includes an alignment component, which includes a first alignment sensor and a second alignment sensor spaced apart in the vertical direction. The first alignment sensor is located at a position corresponding to the first paper conveying height and is used to detect the alignment position of the first paper. The second alignment sensor is located at a position corresponding to the second paper conveying height and is used to detect the overlapping position of the second paper.

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