Automatic folding paper stacking device

Abstract

This invention discloses an automatic paper stacking device, including a frame and a paper feeding mechanism, a carrying mechanism, and a paper pressing mechanism arranged on the frame. The paper feeding mechanism is used to convey folded paper along the fold width direction. The carrying mechanism is located downstream of the paper feeding mechanism and is used to stack the folded paper conveyed by the paper feeding mechanism. The paper pressing mechanism is located downstream of the paper feeding mechanism and above the carrying mechanism. During the current paper feeding process of the paper feeding mechanism, the paper pressing mechanism disengages from the carrying platform of the carrying mechanism or the folded paper it carries, leaving a stacking channel for the currently fed paper on the carrying mechanism. When the paper feeding mechanism completes the current paper feeding, the paper pressing mechanism contacts the carrying platform of the carrying mechanism or the folded paper it carries, pressing down the folded paper currently stacked on the carrying mechanism. This invention can achieve automatic, efficient, and standardized stacking processing of folded paper with high stacking quality.

Description

Technical Field

[0001] This invention relates to origami equipment (e.g., a paper stacking machine), specifically a device for automatically stacking (piling) folded paper in sequence. Background Technology

[0002] In the document printing or graphic management industry, paper folding (also known as paper stacking) involves folding large-format papers (such as engineering drawings) to meet the technical requirements of later binding and archiving. With the advancement of technology, paper folding is now mainly achieved using high-efficiency paper folding machines (also known as paper stacking machines, hereinafter referred to as paper folding machines).

[0003] Currently, most printing equipment on the market lacks equipment for automatically stacking (i.e., storing) folded paper output from folding machines. Large-capacity automatic stacking of folded paper from folding machines is not possible. This is because the folded paper output from folding machines is in a free and loose state (i.e., a fluffy state) lacking compression. Although it has obvious creases, the pages on both sides of each crease are relatively fluffy. This is especially prominent in large-format drawings that are in roll form before entering the folding machine. The roll itself has a certain curvature, and the curvature is obvious after folding, particularly at the end of the fold. Allowing the relatively fluffy, sequentially folded paper to stack automatically at the paper output of the folding machine can easily lead to the following technical problems:

[0004] 1. Stacked folded paper has poor stability, which is not conducive to achieving the stacking and forming of large-capacity folded paper;

[0005] 2. During the stacking process, the subsequent folded paper is prone to unfolding, curling inward and / or folding due to the opposing or frictional forces acting on the relatively fluffy preceding folded paper, which can affect subsequent processing.

[0006] 3. During the stacking process, later folded paper can easily get stuck in the fluffy pages of earlier folded paper, causing the folded paper to overlap and affecting the technical requirements for the standard order of folding paper in subsequent processing.

[0007] The above situation is most common in the stacking process after large-format paper has undergone fan-shaped folding (i.e., longitudinal folding, the first folding process). This is because:

[0008] On the one hand, folded paper formed by fan-shaped folding, without horizontal folding, is relatively long;

[0009] Secondly, some engineering drawings are several meters long, and after being folded in a fan shape, they have many layers and a large thickness, resulting in a fluffy appearance.

[0010] In three aspects, the folding machine folds paper by instantaneous compression, the compression time is short, the crease setting effect is poor, and the fluffy state after the compression is released is obvious;

[0011] Fourthly, the paper folding machine outputs the folded paper in the direction of the fold width when it is folded in a fan shape (that is, the length direction of the folded paper is along the length direction of the paper outlet).

[0012] Thus, during the stacking of large-sized folded paper in the forward and backward sequence along the fold width direction, technical problems such as disordered stacking order and unstable stacking are very likely to occur due to the fluffy state of the folded paper.

[0013] In summary, because folding machines lack equipment for automatically stacking folded paper, their output folded paper cannot be automatically stacked and stored in large quantities. Current conventional processing techniques include two methods:

[0014] Firstly, workers are assigned to manually remove the folded paper after it is output by the folding machine, and stack it in order manually elsewhere to meet the technical requirements of subsequent binding or further folding.

[0015] Secondly, workers are assigned to specific positions. After each sheet of folded paper is output by the folding machine, workers manually sort and compact it, and then manually stack it in sequence at the paper outlet.

[0016] Therefore, current conventional techniques for stacking folded paper require continuous manual intervention. This not only significantly increases the cost of paper folding, but also, due to the high efficiency and continuous folding of paper folding machines, it is difficult for manual workers to adapt to the high-speed output of folded paper, resulting in a high probability of errors. Summary of the Invention

[0017] The technical objective of this invention is to provide a stacking device capable of automatically, efficiently, and systematically stacking folded paper, addressing the unique characteristics of folded paper stacking and the shortcomings of existing technologies.

[0018] The technical objective of this invention is achieved through the following technical solution: an automatic paper stacking device, comprising a frame, a paper feeding mechanism, and a carrying mechanism;

[0019] The paper feeding mechanism is arranged on the frame and is used to convey the folded paper along the fold width direction;

[0020] The supporting mechanism is arranged on the frame and is located downstream of the paper feeding mechanism, and is used to stack the folded paper conveyed by the paper feeding mechanism.

[0021] The stacking device also includes a paper pressing mechanism;

[0022] The paper pressing mechanism is arranged on the frame and is located downstream of the paper feeding mechanism and above the carrying mechanism;

[0023] During the current paper feeding process of the paper feeding mechanism, the paper pressing mechanism disengages from the carrying platform of the carrying mechanism or the folded paper it carries, leaving a stacking channel for the current paper feeding on the carrying mechanism;

[0024] When the paper feeding mechanism completes the current paper feeding, the paper pressing mechanism contacts the carrying platform of the carrying mechanism or the folded paper it carries, pressing down the folded paper currently stacked on the carrying mechanism.

[0025] The aforementioned technical measures, addressing the unique requirement of stacking folded paper, employ a paper-pressing mechanism positioned downstream of the paper feeding mechanism and above the carrying mechanism. The pressing action of this mechanism is synchronized with the feeding action of the paper feeding mechanism. This allows the paper-pressing mechanism to automatically tighten and compact the folded paper stacked on the carrying mechanism without affecting the paper feeding or the stacking of the incoming folded paper on the carrying mechanism, eliminating the need for manual intervention. The tightening and compaction of the preceding folded paper by the paper-pressing mechanism helps maintain and deepen the creases. Furthermore, it effectively reduces the fluffiness of the preceding folded paper during the entry and placement of subsequent folded paper, ensuring that subsequent folded paper falls reliably and sequentially on top of it. This largely prevents disorder during stacking, improves the stacking quality of the folded paper, and enhances its standardization, facilitating subsequent processing. Meanwhile, the stacked folded papers are pressed and compacted by the paper pressing mechanism, which ensures good stability and facilitates the stacking of large-capacity folded papers, resulting in high stacking efficiency.

[0026] Therefore, the stacking device of the above-mentioned technical measures can realize automatic, efficient and standardized stacking of folded paper, thereby replacing on-site workers, improving stacking quality and reducing folding costs. When connected with a folding machine, it can reliably adapt to the high-speed paper output of the folding machine, with high stacking efficiency and good standardization.

[0027] As one of the preferred solutions, the paper pressing mechanism mainly consists of multiple sets of paper-feeding components and paper-feeding drive components;

[0028] Multiple sets of paper-tapping assemblies are arranged at intervals along the length of the paper inlet of the paper feeding mechanism. Each set of paper-tapping assemblies is rotatably mounted on a support beam via a rotating shaft. The support beam is fixed to the frame along the length of the paper inlet of the paper feeding mechanism.

[0029] Each set of paper-tapping drive components is used to drive at least one set of paper-tapping components to produce a rotational motion;

[0030] Driven by the corresponding paper-tapping drive component, the paper-tapping component rotates to detach from / contact the support platform of the support mechanism or the folded paper it supports.

[0031] The paper pressing mechanism of the above-mentioned technical measures, through multiple sets of paper-tapping components arranged at intervals along the length direction of the paper inlet, can reliably adapt to pressing and compacting folded papers of different folding lengths, and has a wide range of applications.

[0032] Meanwhile, the paper-pressing mechanism of the aforementioned technical measures is formed on the frame using a rotary action structure. Its compact layout and small space occupation contribute to the overall compactness of the stacking device. Furthermore, the rotary action structure compacts and presses the folded paper stacked on the supporting mechanism. Compared to vertical displacement structures, its operation is quieter and applies gentler force to the folded paper, helping to protect it from impact damage.

[0033] Furthermore, the multiple paper-tapping components of the paper-pressing mechanism are divided into left and right paper-tapping units, corresponding to the length direction of the paper inlet of the paper feeding mechanism.

[0034] The rotation direction of each paper-tapping component in the left paper-tapping unit is opposite to the rotation direction of each paper-tapping component in the right paper-tapping unit.

[0035] Furthermore, the downward pressing direction of each paper-pressing component of the left paper-pressing unit and the downward pressing direction of each paper-pressing component of the right paper-pressing unit are respectively moving outward from the center.

[0036] The paper-pressing mechanism described above, designed for the unique characteristics of stacking large-length folded papers sequentially along the fold width, generates left- and right-reverse pressing and compacting forces. This tightens the folded paper, making it flatter, preventing wrinkles and warping, and providing excellent compaction and shaping. The left- and right-reverse compaction forces achieve the same effect as the compression and shaping technique used in manual paper folding, where the paper is squeezed and shaped from the center outwards.

[0037] Furthermore, the multiple paper-tapping components of the paper pressing mechanism use the center of the paper inlet of the paper feeding mechanism along its length as the dividing center of the left and right paper-tapping units;

[0038] The number and position of the paper-tapping components in the left-side paper-tapping unit correspond to the number and position of the paper-tapping components in the right-side paper-tapping unit.

[0039] The paper pressing mechanism of the above-mentioned technical measures applies more even force to the left and right along the length of the folded paper, which is conducive to further improving the compaction and flatness of the folded paper, and the anti-wrinkle and anti-warping effects are more significant.

[0040] Furthermore, the paper-tapping assembly mainly consists of a rotating shaft, a support frame, and a soft paper-tapping head;

[0041] The two ends of the rotating shaft are rotatably mounted on the front support beam and the rear support beam via two sets of bearing assemblies. The front support beam and the rear support beam are arranged at intervals along the paper feeding depth direction of the paper feeding mechanism.

[0042] The support frame is connected to the rotation axis between the front support beam and the rear support beam;

[0043] The flexible paper-tapping head is connected to the outside of the rotation position of the support frame, and serves as a support platform for rotating away from / contacting the support mechanism or the folded paper it carries.

[0044] The paper-tapping assembly described above uses a rigid support frame to convert the rotational torque of the drive shaft into the downward pressure torque of the flexible paper-tapping head, resulting in excellent compaction and pressing of the folded paper stacked on the support mechanism. Simultaneously, the direct force applied by the flexible paper-tapping head to the folded paper allows the torque to be maintained for a long time without damaging the paper. In other words, the greater torque for compaction and the protection of the folded paper from damage do not conflict, thus reliably compacting and pressing the folded paper while protecting it from damage, resulting in excellent compaction and shaping effects.

[0045] Furthermore, the flexible paper-tapping head is a flexible and deformable strip-shaped plate structure or a brush structure. This paper-tapping assembly, through the flexible paper-tapping head, taps and presses the folded paper tightly along its fold width direction, thereby significantly tightening, pressing, and shaping the folded paper in that direction. Simultaneously, when the length of the flexible paper-tapping head can be adapted to the fold width of large-format folded paper, this paper-tapping assembly can be used with various other folded papers smaller than the large-format folded paper, demonstrating good versatility.

[0046] As one of the preferred solutions, the paper-tapping drive assembly mainly consists of a second drive motor, a second active synchronous pulley, a second driven synchronous pulley, and a second synchronous belt;

[0047] The second drive motor is fixed on the support beam, and the output shaft of the second drive motor is connected to the second active synchronous pulley;

[0048] The driven synchronous pulley two is connected to the rotating shaft of the corresponding paper-tapping assembly, and is on the same side as and corresponding to the active synchronous pulley two;

[0049] The second synchronous belt tensioning device is mounted on the second active synchronous pulley and the second driven synchronous pulley.

[0050] The paper-feeding drive assembly described above, while maintaining high-precision transmission, facilitates a more compact and miniaturized structure for the entire paper-pressing mechanism, allowing the drive motors to be arranged within the gaps between the paper-feeding assemblies. Furthermore, it enables a single drive motor to synchronously drive multiple paper-feeding assemblies via a synchronous belt. Of course, this requires that each of these paper-feeding assemblies has a driven synchronous pulley mounted on its rotating shaft within the same synchronous belt's drive range, thus simplifying the forming structure of the paper-pressing mechanism.

[0051] As one of the preferred solutions, the carrying platform of the carrying mechanism is a liftable structure, which gradually decreases from top to bottom according to the thickness of the stacked folded paper during the continuous paper feeding process;

[0052] The bearing mechanism mainly consists of a bearing platform, two sets of lifting components, and a lifting drive component;

[0053] The carrying platform is arranged horizontally along the length of the paper feed mechanism's paper inlet, and the two ends of the carrying platform are connected to two sets of lifting components.

[0054] The lifting assembly mainly consists of a transmission screw, a screw nut, and at least one guide shaft;

[0055] The transmission screw is vertically mounted on the corresponding part of the frame via upper and lower sets of bearing assemblies;

[0056] The inner hole of the lead screw nut is connected to the transmission lead screw by a threaded structure, and the lead screw nut is fixedly connected to the corresponding end of the bearing platform;

[0057] The guide shaft is vertically fixed at the corresponding part of the frame and is spaced apart from the transmission screw in the width direction of the bearing platform. The guide shaft is movably connected to the corresponding end of the bearing platform through a linear bearing.

[0058] The lifting drive assembly is used to drive the transmission screw of the lifting assembly to generate a rotational motion;

[0059] Driven by the lifting drive assembly, the two sets of lifting assemblies rotate synchronously, causing the support platform to move horizontally up and down.

[0060] The support mechanism of the above-mentioned technical measures can reliably adapt to the stacking and forming of large-capacity folded paper. That is to say, the support mechanism descends with the stacking thickness of the folded paper to meet the stacking space of subsequent folded paper, while ensuring that the feeding and stacking of each folded paper is within the travel range of the paper pressing mechanism, thereby ensuring the stacking quality.

[0061] In addition, the lifting components of the supporting mechanism of the above-mentioned technical measures are arranged on both sides of the frame, which is conducive to the compactness of the entire structure and occupies little space.

[0062] Furthermore, the lifting drive assembly mainly consists of a drive motor, an active synchronous pulley, two driven synchronous pulleys, and a synchronous belt;

[0063] The drive motor is fixed on the frame, and the output shaft of the drive motor is connected to the active synchronous pulley.

[0064] Two driven synchronous pulleys are connected to the transmission screws of the two sets of lifting components, corresponding to the driving synchronous pulley.

[0065] The timing belt is tightly fitted onto the driving timing pulley and the two driven timing pulleys.

[0066] The lifting drive components of the above-mentioned technical measures can, on the one hand, ensure the high-precision and stable lifting of the bearing platform and prevent jamming due to the asynchrony of the two sets of lifting components during the lifting process; on the other hand, they are conducive to the compactness and miniaturization of the entire bearing mechanism.

[0067] Furthermore, the supporting mechanism also includes an auxiliary platform;

[0068] The auxiliary platform is detachably connected to the support platform on the side opposite to the paper feeding mechanism, and the top surface of the auxiliary platform corresponds to the top surface of the support platform.

[0069] The supporting mechanism of the above-mentioned technical measures, through the supplement of the supporting platform by the auxiliary platform, is conducive to adapting to the stacking of folded paper of different specifications, and has good flexibility.

[0070] As one preferred embodiment, the paper feeding mechanism divides the feeding speed of the currently folded paper into two stages: a front stage and a rear stage. The transmission speed of the rear stage for the tail section of the folded paper is lower than the transmission speed of the front and middle sections of the folded paper in the front stage. This technical measure, by reducing the transmission speed of the tail section of the currently folded paper, can effectively prevent the folded paper fed into the carrying mechanism from slipping backward and affecting the stability required for stacking. In other words, by reducing the transmission speed of the tail section of the currently folded paper, it is ensured that the currently folded paper stacked on the carrying mechanism is basically free-falling, so as to cooperate with the paper pressing mechanism to improve the stacking quality.

[0071] The beneficial technical effects of this invention are as follows: The stacking device described above, taking into account the special nature of stacking folded paper, features a paper-pressing mechanism positioned downstream of the paper feeding mechanism and above the carrying mechanism. The pressing action of the paper-pressing mechanism is linked to the paper feeding action of the paper feeding mechanism. Thus, without affecting the paper feeding or the stacking of the folded paper on the carrying mechanism, the paper-pressing mechanism automatically tightens and compacts the folded paper stacked on the carrying mechanism, eliminating the need for manual intervention. The tightening and compaction of the preceding folded paper by the paper-pressing mechanism helps maintain and deepen the creases of the folded paper. Furthermore, it effectively reduces the fluffiness of the preceding folded paper during the entry and placement of subsequent folded paper, ensuring that subsequent folded paper falls reliably and sequentially on top of the preceding folded paper. This largely avoids disorder during the stacking process, improving the stacking quality and standardization of the folded paper, thus facilitating subsequent processing. Meanwhile, the stacked folded papers are pressed and compacted by the paper pressing mechanism, which ensures good stability and facilitates the stacking of large-capacity folded papers, resulting in high stacking efficiency.

[0072] Therefore, the stacking device of the above-mentioned technical measures can realize automatic, efficient and standardized stacking of folded paper, thereby replacing on-site workers, improving stacking quality and reducing folding costs. When connected with a folding machine, it can reliably adapt to the high-speed paper output of the folding machine, with high stacking efficiency and good standardization.

[0073] It is important to note that when the stacking device of the above-mentioned technical measures is connected to the folding machine, the paper feeding mechanism effectively becomes the paper output mechanism of the folding machine. That is, the folded paper output by the folding machine is stacked precisely on the aforementioned support mechanism. Of course, it is possible that the folding machine retains an independent paper output mechanism. If so, in the connection process, the folded paper output by the folding machine via the paper output mechanism is transported by the aforementioned paper feeding mechanism and then stacked on the aforementioned support mechanism. Therefore, it is evident that the above-mentioned stacking device, when connected to the folding machine, achieves the best practical technical effect. Attached Figure Description

[0074] Figure 1 This is a schematic diagram of the structure of a folded paper formed by longitudinally folding a single sheet of paper during the overlay process (i.e., the first folding process).

[0075] Figure 2 This is a schematic diagram of one structure of the present invention.

[0076] Figure 3 for Figure 1 Rear view.

[0077] Figure 4 for Figure 1 and Figure 2 A schematic diagram of the supporting mechanism in the diagram.

[0078] Figure 5 for Figure 4 A schematic diagram of the fit between the transmission lead screw, lead screw nut, and synchronous pulley.

[0079] Figure 6 for Figure 1 and Figure 2 A schematic diagram of the paper pressing mechanism.

[0080] Figure 7 for Figure 6 A schematic diagram of the paper-pressing mechanism's paper-tapping drive component.

[0081] Figure 8 for Figure 6 A schematic diagram of the paper-tapping component structure.

[0082] Figure 9 for Figure 2 A schematic diagram of a partial vertical cross-sectional structure.

[0083] Figure 10 for Figure 6 A schematic diagram of the action process of the paper pressing mechanism pressing the folded paper (initial state after the paper is detached from the fold).

[0084] Figure 11 for Figure 6 A schematic diagram of the paper-pressing mechanism pressing and folding the paper (the pressure state after pressing and folding the paper).

[0085] The symbols in the diagram mean: 1—frame; 11—left side upright; 12—right side upright; 13—bottom crossbeam;

[0086] 2—Paper feeding mechanism; 21—Paper feeding guide plate; 22—Lower paper feeding roller; 23—Upper paper feeding roller; 24—Drive motor three; 241—Drive pulley; 25—Transmission belt;

[0087] 3—Bearing mechanism; 31—Bearing platform; 311—Positioning component; 32—Auxiliary platform; 33—Lifting assembly; 331—Transmission screw; 332—Screw nut; 333—Linear bearing; 334—Guide shaft; 335—Upper limit component; 336—Lower limit component; 337—Upper bearing assembly; 338—Lower bearing assembly; 34—Lifting drive assembly; 341—Drive motor one; 342—Active synchronous pulley one; 343—Driven synchronous pulley one; 344—Synchronous belt one; 345—Tensioner one;

[0088] 4—Paper pressing mechanism; 41—Front support beam; 42—Rear support beam; 43—Paper tapping assembly; 431—Rotating shaft; 432—Support frame; 433—Connecting plate; 434—Soft paper tapping head; 44—Paper tapping drive assembly; 441—Drive motor II; 442—Active synchronous pulley II; 443—Driven synchronous pulley II; 444—Synchronous belt II; 445—Tensioning pulley II; A—Left paper tapping unit; B—Right paper tapping unit. Detailed Implementation

[0089] This invention relates to origami equipment (e.g., a paper stacking machine), specifically a device for automatically stacking (piling) folded paper in sequence. The main technical solution of this invention will be described in detail below with reference to several embodiments. Embodiment 1 is illustrated in conjunction with the accompanying drawings—that is… Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 The technical solution of the present invention is clearly and in detail explained; although other embodiments are not shown in separate drawings, their main structure can still be referred to the drawings of Embodiment 1.

[0090] It should be noted that the accompanying drawings of this invention are schematic, and unnecessary details have been simplified to clarify the technical objectives of this invention, so as to avoid obscuring the technical solutions contributed by this invention to the prior art. Furthermore, the directions described below, such as front, back, left, right, top, bottom, and top, are based on the stacking device being placed vertically with the paper inlet facing the front.

[0091] Example 1

[0092] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, the present invention includes a frame 1 and a paper feeding mechanism 2, a carrying mechanism 3 and a paper pressing mechanism 4 arranged on the frame 1.

[0093] Specifically, the frame 1 has a left side plate 11 and a right side plate 12 arranged at intervals. A bottom beam 13 is connected at the bottom between them, and the upper area between them serves as the arrangement space for the paper feeding mechanism 2, the carrying mechanism 3 and the paper pressing mechanism 4. The support beam of the paper pressing mechanism 4 also constitutes the top support structure between the left side plate 11 and the right side plate 12.

[0094] The paper feeding mechanism 2 is mounted on the front side of the upper part of the frame 1 and is used to transport folded paper. The transport direction is along the fold width direction of the paper, that is, the two folds enter the transport in sequence, rather than simultaneously. This makes the length direction of the folded paper (i.e., the direction where the fold ends are located) correspond to the length direction of the paper feed inlet of the paper feeding mechanism 2. The paper feeding mechanism 2 mainly consists of a paper feed guide plate 21, a lower paper feed roller 22, an upper paper feed roller 23, and a paper feed drive assembly.

[0095] More specifically, the rear part of the paper feed guide plate 21 is connected to the upper and lower paper feed rollers, or passes through the upper and lower paper feed rollers and is connected to the carrying mechanism 3 described below. The front part of the paper feed guide plate 21 is extended outward on the front side of the upper and lower paper feed rollers.

[0096] The roller shaft of the lower feed roller 22 is rotatably arranged below the feed guide plate 21 via bearing assemblies at both ends. Multiple rollers arranged at intervals are mounted along the axial direction of the lower feed roller 22 roller shaft, each roller having a flexible friction-enhancing structure on its outer circumference. The radius of each roller of the lower feed roller 22 is slightly larger than the straight-line distance between its roller shaft and the top surface of the feed guide plate 21. Thus, each roller of the lower feed roller 22 passes through the feed guide plate 21 and slightly protrudes from the top surface of the feed guide plate 21, requiring flexible contact or a micro-gap fit with the upper feed roller 23 at the top surface of the feed guide plate 21, smaller than the thickness of the feed paper.

[0097] The roller shaft of the upper feed roller 23 is rotatably arranged above the feed guide plate 21 via bearing assemblies at both ends. Multiple rollers are axially mounted on the roller shaft of the upper feed roller 23 at intervals. Each roller has a flexible friction-enhancing structure on its outer circumference. Of course, each roller on the upper feed roller 23 has a one-to-one corresponding relationship with each roller on the lower feed roller 22.

[0098] The upper and lower feed rollers each have a corresponding roller that forms a flexible contact fit or a micro-gap fit smaller than the thickness of the paper feed at the top surface of the feed guide plate 21. In this embodiment, the upper feed roller 23 is used as the active rotating roller.

[0099] The paper feed drive assembly mainly consists of a drive motor 24, a drive pulley 241, a transmission belt 25, and a driven pulley. The drive motor 24 is fixed to the frame 1, bypassing the paper feed inlet and other functional structures; the output shaft of the drive motor 24 is connected to the drive pulley 241. The driven pulley is connected to the roller shaft of the aforementioned paper feed roller 23, corresponding to the drive pulley 241. The transmission belt 25 is tensioned and fitted between the drive pulley 241 and the driven pulley, used to transmit the driving force of the drive motor 24 to the paper feed roller 23.

[0100] The aforementioned paper feeding drive assembly requires the drive motor 24 to stably transmit driving force to the upper paper feeding roller 23 to ensure reliable and continuous paper feeding and prevent slippage of the upper paper feeding roller 23. Therefore, the transmission belt 25 is preferably a synchronous belt, and the driving pulley 241 and the driven pulley are synchronous belt pulley structures respectively.

[0101] To control the accurate movement of the paper feeding drive assembly, a paper head position sensor and a paper tail position sensor are provided on the bottom or inside of the aforementioned paper feeding guide 21, or even on its adjacent side. The paper head position sensor is positioned further forward than the paper tail position sensor. The paper head position sensor is used to detect the position of the paper head end of the folded paper, and the controller controls the drive motor 24 to start via the detection signal. The paper tail position sensor is used to detect the position of the paper tail end of the folded paper, and the controller controls the drive motor 24 to slow down via the detection signal to prevent the folded paper fed into the carrying mechanism 3 from slipping backward and affecting the stability required for stacking. The controller also controls the drive motor 24 to stop after the folded paper has been transported according to the travel distance, ensuring that the currently stacked folded paper on the carrying mechanism is essentially free-falling, in order to cooperate with the paper pressing mechanism to improve stacking quality. In other words, through the aforementioned control, the paper feeding mechanism 2 divides the feeding speed of the currently folded paper into two transmission control stages: a front stage and a rear stage. The speed at which the rear section of the folded paper is fed in the rear stage is significantly lower than the speed at which the front and middle sections (i.e., the main body) of the folded paper are fed in the front stage. The slower the transmission speed in the rear stage, the more stably the currently folded paper is stacked on the carrier mechanism, and the better the alignment effect. Of course, the slow transmission speed in the rear stage is based on the premise of the fast transmission in the front stage and the effective feeding of the currently folded paper into the carrier mechanism. If the transmission speed is too slow, the currently folded paper will not be able to enter the carrier mechanism; if the transmission speed is too fast, the folded paper entering the carrier mechanism will easily be inertial and move outward. Therefore, this slowness refers to the appropriate speed at which the currently folded paper falls into the carrier mechanism.

[0102] The carrying mechanism 3 is mounted on the rear side of the upper part of the frame 1, downstream of the paper feeding mechanism 2 in the transmission direction, and is used to stack the folded paper conveyed by the paper feeding mechanism 2. The carrying platform 31 of the carrying mechanism 3 is a liftable structure to meet the stacking and forming technical requirements of large-capacity folded paper. The carrying mechanism 3 mainly consists of the carrying platform 31, two sets of lifting components 33, and lifting drive components 34.

[0103] More specifically, the carrying platform 31 is arranged horizontally along the length of the paper feed inlet of the paper feeding mechanism 2, with a flat top surface. The length of the carrying platform 31 is greater than the effective length of the paper feed inlet of the paper feeding mechanism 2, and the width of the carrying platform 31 is slightly greater than the effective width of conventional folded paper. In short, the effective carrying area of ​​the carrying platform 31 should preferably be greater than the fan-shaped folding area of ​​common large-format folded paper (e.g., A0) to enhance its applicability. At both ends of the carrying platform 31 along its length, there are positioning parts 311 that are connected to the corresponding lifting components.

[0104] The two sets of lifting components 33 have the same structure. The two sets of lifting components 33 are arranged vertically on the inner side of the left and right side uprights of the frame, outside the effective length coverage of the paper feed inlet of the paper feed mechanism 2.

[0105] The following section uses one of the lifting components 33 as an example to illustrate its structure in detail. The lifting component 33 mainly consists of a transmission screw 331, a screw nut 332, two guide shafts 334, an upper limit component 335, and a lower limit component 336.

[0106] The upper limit stop 335 is fixed to the frame 1 near the corresponding upright plate. The frame 1 can be the corresponding upright plate or the support beam of the paper pressing mechanism 4 described below. Position sensors are provided on the upper limit stop 335 and even on other structures nearby to detect the rising position of the support platform 31, so that the controller can control the rising stroke of the support platform 31.

[0107] The lower limit member 336 is fixed to the component structure of the frame 1 near the corresponding upright plate. The component structure of the frame 1 can be the corresponding upright plate or the aforementioned bottom crossbeam 13. Position sensors are provided on the lower limit member 336 and even on other structures nearby to detect the descent position of the aforementioned support platform 31, so that the controller can control the descent stroke of the support platform 31.

[0108] The upper end of the transmission screw 331 is rotatably mounted on the center of the upper limit member 335 via the upper bearing assembly 337. The lower end of the transmission screw 331 is rotatably mounted on the center of the lower limit member 338 via the lower bearing assembly 338. Thus, the transmission screw 331 is vertically mounted on the inner side of the corresponding upright plate of the frame 1 via the upper and lower bearing assemblies.

[0109] The lead screw nut 332 and the transmission lead screw 331 are a matching structure, with its inner hole connected to the transmission lead screw 331 by a threaded structure. The outer periphery of the lead screw nut 332 is fixedly connected to the positioning member 311 at the corresponding end of the bearing platform 31. That is to say, the rotational motion of the transmission lead screw 331 is converted into linear displacement motion through the lead screw nut 332.

[0110] Two guide shafts 334 are respectively located on the front and rear sides of the transmission screw 331, forming a symmetrical arrangement with the transmission screw 331 as the center. The upper end of each guide shaft 334 is fixed to the corresponding end of the upper limit member 337, and the lower end is fixed to the corresponding end of the lower limit member 338. In this way, the guide shafts 334 are vertically fixed to the inner side of the corresponding upright plate of the frame 1, and are spaced and cooperate with the transmission screw 331 in the width direction of the bearing platform 31. The guide shafts 334 pass through the positioning members 311 at the corresponding ends of the bearing platform 31, and are connected to the positioning members 311 through linear bearings 333. That is, the linear bearings 333 are fixed to the corresponding ends of the positioning members 311, and the bearing platform 31 can smoothly move up and down on the guide shafts 334 through the linear bearings 333.

[0111] The lifting drive assembly 34 mainly consists of a drive motor 341, a driving synchronous pulley 342, two driven synchronous pulleys 343, and a synchronous belt 344. The drive motor 341 is fixed to the bottom crossbeam 13 of the frame 1, located at the center distance between the left and right lifting assemblies 33. The output shaft of the drive motor 341 is connected to the driving synchronous pulley 342. The two driven synchronous pulleys 343 correspond to the left and right lifting assemblies 33, respectively connected to the bottom of the transmission screw 331 of their respective lifting assemblies 33 (above the lower limit member 338), corresponding to the driving synchronous pulley 342. The synchronous belt 34 is tensioned and fitted onto the driving synchronous pulley 342 and the two driven synchronous pulleys 343 via a tensioning pulley 345. Thus, a drive motor can simultaneously drive the left and right sets of lifting components 33 to produce synchronous lifting actions. In other words, under the drive of the lifting drive component 34, the two sets of lifting components 33 rotate synchronously to drive the bearing platform 31 to produce horizontal rising / falling actions.

[0112] The start / stop operation of the drive motor 341 of the lifting drive assembly 34 is controlled by the controller through the detection signal of the paper stack thickness detection sensor. The paper stack thickness detection sensor is set at or near the paper inlet and is used to detect the thickness of the folded paper stack on the carrier platform 31. If the detected folded paper stack thickness affects the upper subsequent stacking space (i.e., the stack thickness exceeds the set minimum allowable space height), the controller starts the drive motor 341 to drive the carrier platform 31 to descend. The descent stops when the set maximum allowable space height is reached. This process is repeated, and the carrier platform 31 gradually descends from top to bottom according to the thickness of the stacked folded paper during continuous paper feeding. When the carrier platform 31 descends to the detection range of the lower limit member 336, the current stacking is completed, paper feeding is paused, the stacked paper is transferred, and the carrier platform 31 is emptied. When the carrier platform 31 is vacated, the controller starts the drive motor 341 to drive in reverse, so as to drive the carrier platform 31 to rise. When it rises to the detection range of the upper limit component 335, the carrier platform 31 is reset, and the paper feeding mechanism 2 can continue to feed paper and re-stack.

[0113] The aforementioned drive motor 341 is preferably a stepper motor or a servo motor, whose holding torque characteristics are beneficial to ensuring control accuracy and improving the relatively constant holding effect of lifting the support platform 31.

[0114] In the aforementioned structure of the carrier mechanism 3, to accommodate larger paper folds and improve operational flexibility on the carrier platform 31, an auxiliary platform 32 can be connected to the carrier platform 31 via a detachable structure (e.g., a hook). The length of the auxiliary platform 32 roughly corresponds to the effective carrying length of the carrier platform 31 (excluding the positioning element 311), and its width is determined by the maximum applicable folded paper width. That is, the width of the carrier platform 31 combined with the width of the auxiliary platform 32 can accommodate the maximum applicable folded paper width. The auxiliary platform 32 is detachably connected to the carrier platform 31 on the side opposite to the paper feeding mechanism 2—that is, the rear side. The top surface of the auxiliary platform 32 is flat and essentially flush with the top surface of the carrier platform 31.

[0115] The paper pressing mechanism 4 is mounted on the rear side of the upper part of the frame 1, downstream of the paper feeding mechanism 2 in the transmission direction and above the carrying mechanism 3. It is used to press and compact the folded paper stacked on the carrying mechanism 3 for each batch. The paper pressing mechanism 4 mainly consists of a front support beam 41, a rear support beam 42, multiple sets of paper-tapping assemblies 43, and multiple sets of paper-tapping drive assemblies 44.

[0116] More specifically, the front support beam 41 and the rear support beam 42 serve as the supporting foundation for multiple paper-feeding assemblies 43. They are arranged at intervals along the paper feeding depth direction of the paper feeding mechanism 2, and the spacing between them meets the paper feeding width of the paper-feeding assembly 43. The length direction of the front support beam 41 and the rear support beam 42 is along the length direction of the paper feeding port of the paper feeding mechanism 2. The front support beam 41 and the rear support beam 42 are respectively fixed on the frame 1, that is, fixed on the left and right vertical plates of the frame 1, forming support for the left vertical plate 11 and the right vertical plate 12 at the top of the frame 1.

[0117] Multiple sets of paper-tapping assemblies 43 are arranged at intervals along the length of the paper inlet of the paper feeding mechanism 2. In this embodiment, there are eight sets of paper-tapping assemblies 43 arranged at approximately equal intervals. These paper-tapping assemblies 43 are divided into two paper-tapping units, namely left paper-tapping unit A and right paper-tapping unit B, corresponding to the center of the paper inlet of the paper feeding mechanism 2. The division into left paper-tapping unit A and right paper-tapping unit B is because the rotation direction of each paper-tapping assembly 43 in left paper-tapping unit A is opposite to the rotation direction of each paper-tapping assembly 43 in right paper-tapping unit B, so as to form a paper-tapping and pressing action that moves outward from the center. In other words, the downward pressing direction of each paper-pressing component 43 of the left paper-pressing unit A and the downward pressing direction of each paper-pressing component 43 of the right paper-pressing unit B are respectively moving outward from the center, thereby flattening and stretching the tightly folded paper, ensuring the compaction effect, avoiding the other end of the folded paper from curling up and deforming when pressing the paper from a single direction, and also avoiding the wrinkling deformation caused by the movement of both sides from the outside to the inside, which would squeeze the folded paper towards the center.

[0118] The division between the left-side paper-tapping unit A and the right-side paper-tapping unit B is basically centered on the length direction of the paper inlet of the paper feeding mechanism 2. The number and position of the paper-tapping components 43 in the left-side paper-tapping unit A correspond to the number and position of the paper-tapping components 43 in the right-side paper-tapping unit B, forming a basic left-right symmetrical arrangement. In this embodiment, there are eight sets of paper-tapping components 43. The left-side paper-tapping unit A has four sets of paper-tapping components 43 arranged at intervals, and the right-side paper-tapping unit B has four sets of paper-tapping components 43 arranged at intervals. The paper-tapping components 43 in the left-side paper-tapping unit A and the right-side paper-tapping unit B are structurally identical, except for their opposite rotation direction.

[0119] Taking one set of paper-tapping components 43 as an example, and taking one set of paper-tapping drive components 44 driving two sets of paper-tapping components 43 in conjunction with this embodiment as an example, the structure of paper-tapping component 43 and the structure of paper-tapping drive component 44 will be described in detail.

[0120] The paper-feeding assembly 43 mainly consists of a rotating shaft 431, a support frame 432, and a soft paper-feeding head 434. The two ends of the rotating shaft 431 are rotatably mounted on the front support beam 41 and the rear support beam 42 through two sets of bearing assemblies, and are located above the support platform 31 of the aforementioned support mechanism 3, and also above the paper inlet of the aforementioned paper feeding mechanism 2.

[0121] The support frame 432 is a rigid flat plate structure. To reduce weight, multiple weight-reducing holes are provided on the support frame 432. The width of the support frame 432 is smaller than the spacing between the front support beam 41 and the rear support beam 42. One side of the support frame 432—that is, the rotation center side—is fixedly connected to the rotation shaft 431, which is located on the rotation shaft 431 between the front support beam 41 and the rear support beam 42.

[0122] The flexible paper-pressing head 434 is a flexible and deformable rubber strip structure (a brush structure can also be used instead). The flexible paper-pressing head 434 is connected to the outside of the rotating position of the support frame 432 via a connecting plate 433. During the paper pressing process, it serves as the support platform 31 for rotating away from / contacting the support mechanism 3, or as the support for folded paper. Connecting the flexible paper-pressing head 434 to the support frame 432 via the connecting plate 433 is for ease of connection and future maintenance; the flexible paper-pressing head 434 can also be directly connected to the outside of the rotating position of the support frame 432.

[0123] In the aforementioned cooperation structure between the paper-tapping assembly 43 and the supporting mechanism 3, the outer position of the rotating support frame 432 is located above the supporting platform 31, and does not directly contact the supporting platform 31 or the folded paper it carries. Only the lower middle part of the soft paper-tapping head 434, during rotation, makes direct contact with the supporting platform 31 and the folded paper it carries; during the contact process, it undergoes flexible deformation due to resistance to press and compact the folded paper carried by the supporting platform 31, but without causing damage to the compacted folded paper.

[0124] The paper-feeding drive assembly 44 mainly consists of a second drive motor 441, a second active synchronous pulley 442, two second driven synchronous pulleys 443, and a second synchronous belt 444. The second drive motor 441 is fixed to the rear side of the front support beam 41, positioned above the two sets of paper-feeding assemblies 43 at the current position. The output shaft of the second drive motor 441 extends from the front side of the front support beam 41 and connects to the second active synchronous pulley 442. The two second driven synchronous pulleys 443 correspond to the two sets of paper-feeding assemblies 43 at the current position, and are connected to the ends of the rotating shafts 431 of the two sets of paper-feeding assemblies 43 extending from the front support beam 41, corresponding to the second active synchronous pulley 442. The second synchronous belt 44 is tensioned and fitted onto the second active synchronous pulley 442 and the two second driven synchronous pulleys 443 via a tensioning pulley 445. Thus, one set of paper-feeding drive assemblies 444 can drive two sets of paper-feeding assemblies 43 to rotate.

[0125] Given that the left-side paper-tapping unit A has four sets of paper-tapping components 43, it also has two sets of paper-tapping drive components 44. Naturally, the actions of these two sets of paper-tapping drive components 44 should be synchronized. Similarly, given that the right-side paper-tapping unit B has four sets of paper-tapping components 43, it also has two sets of paper-tapping drive components 44. Naturally, the actions of these two sets of paper-tapping drive components 44 should also be synchronized with the actions of the two sets of paper-tapping drive components 44 in the right-side paper-tapping unit B.

[0126] In the aforementioned paper pressing mechanism 4, to improve the rapid response of the paper-tapping assembly 43's rotational action and reduce unnecessary rotational stroke, each set of paper-tapping assemblies 43 should form an arc-shaped motion trajectory during its lifting and pressing movements, without requiring circumferential rotation. Thus, a position sensor is installed on the front side of the front support beam 41 to detect the drive stroke of the paper-tapping drive assembly 44. This position sensor can detect the rotational arc length of the main and driven synchronous pulleys, or it can detect the rotational stroke of the synchronous belt. The detection signal is fed back to the controller, which controls the forward and reverse rotation of the drive motor 441 to lift and press the driven paper-tapping assembly 43. That is, under the drive of the corresponding paper-tapping drive assembly 44, the currently driven paper-tapping assembly 43 rotates to disengage from / contact with the support platform 31 of the support mechanism 3 or the folded paper it carries. Compared to circumferential rotation, the non-circumferential arc motion trajectory allows the paper-tapping component to press and tighten the folded paper for a longer time under the same conditions, which is more conducive to compacting and shaping the folded paper. At the same time, the non-circumferential arc motion trajectory effectively reduces the movement space of the paper-tapping component, which is more conducive to the compact and reasonable arrangement of the drive motor, and thus to the compactness and miniaturization of the entire paper pressing mechanism.

[0127] The aforementioned drive motor 441 preferably adopts a stepper motor or a servo motor, whose torque-holding characteristics help ensure control accuracy and improve the relatively constant compaction effect on folded paper.

[0128] As can be seen from the above structure, the actions of the paper feeding mechanism 2, the carrying mechanism 3, and the paper pressing mechanism 4 on the frame 1 are controlled by the controller based on the detection signals of the corresponding sensors. Under the coordination of the controller, the actions of the paper feeding mechanism 2, the carrying mechanism 3, and the paper pressing mechanism 4 are linked. Specifically, the carrying platform 31 of the carrying mechanism 3 or the top surface of the stack of folded paper it carries is positioned at the paper inlet to ensure that the folded paper input at the paper inlet is stably stacked on the carrying platform 31 or the top surface of the stack of folded paper it carries. During the current paper feeding process of the paper feeding mechanism 2, the paper pressing mechanism 4 disengages from the carrying platform 31 of the carrying mechanism 3 or the stack of folded paper it carries, that is, the paper tapping component 43 is raised, leaving a channel for the current paper to be stacked on the carrying platform 31 through the paper inlet; when the paper feeding mechanism 2 completes the current paper feeding, the paper tapping component 43 is pressed down, contacting the carrying platform 31 of the carrying mechanism 3 or the stack of folded paper it carries, pressing down the folded paper currently stacked on the carrying mechanism 3. As the stacking height of folded paper on the carrying platform 31 increases, and with the need for continuous stacking operations, the thickness of the stacked folded paper gradually decreases from top to bottom during continuous paper feeding to accommodate large-capacity stacking.

[0129] like Figure 1 As shown, the stacking device of the present invention is mainly suitable for stacking large-format paper after it has been fan-folded. In practical applications, it is best to connect it with a paper folding machine. In this way, the paper folding machine is responsible for fan-folding the large-format paper, and the stacking device is responsible for stacking the fan-folded paper, automatically and reliably adapting to the high-speed paper output of the paper folding machine. When the stacking device is connected to the paper folding machine, the paper feeding mechanism is actually the paper output mechanism of the paper folding machine. Of course, it is also possible to separate the paper output mechanism of the paper folding machine from the paper feeding mechanism of the stacking device, but this would result in a complex overall structure and an unnecessary increase in size.

[0130] In addition to being suitable for stacking fan-shaped folded paper, the stacking device of the present invention can also theoretically be used for stacking transversely folded paper (i.e., folded paper after fan-shaped folding, folded again along its width and length direction, the second folding process).

[0131] Example 2

[0132] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0133] - The paper-tapping units on the left share the same paper-tapping drive component. That is, the driven synchronous pulleys connected to the rotating shafts of each paper-tapping component are all mounted on the same synchronous belt. This requires multiple tensioning pulleys to tension the synchronous belt at different locations to ensure synchronous drive.

[0134] Similarly, the paper-tapping components of the right-side paper-tapping unit share the same paper-tapping drive component. That is, the driven synchronous pulleys connected to the rotating shafts of each paper-tapping component are all mounted on the same synchronous belt. This requires multiple tensioning pulleys to tension the synchronous belt at different locations to ensure synchronous drive.

[0135] Compared to Embodiment 1, this embodiment is advantageous in ensuring the synchronization of the paper-tapping components of the left and / or right paper-tapping units. However, it requires a high-power drive motor and increases the structural complexity of the synchronous belt tensioning kit. Therefore, the design of Embodiment 1, which uses one set of paper-tapping drive components to simultaneously drive two (or three) sets of paper-tapping components, is simpler and more reasonable. Synchronization can be achieved by controlling the start / stop actions and drive stroke of each drive motor.

[0136] Example 3

[0137] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0138] - The carrying mechanism is a fixed-height structure without lifting. The carrying platform of the carrying mechanism and the paper feeding port of the paper feeding mechanism maintain a large height difference to reserve stacking space.

[0139] - In the paper pressing mechanism, the maximum range of the rotation trajectory of the support frame of the paper-tapping assembly is at the paper inlet of the paper feeding mechanism; the range of the rotation trajectory of the soft paper-tapping head of the paper-tapping assembly interferes with the position of the carrying platform of the carrying mechanism, that is, the length between the outer side and the root of the soft paper-tapping head is relatively long, and the deformable space within this length range is used as the stacking space for folded paper.

[0140] In this embodiment, the flexible paper-tapping head of the paper-tapping assembly has a deformable length range, which creates a stacking space for the folded paper on the support platform. While this achieves a certain stacking effect, the stacking capacity is limited. Furthermore, an excessively long flexible paper-tapping head results in poor compaction and sealing due to its large range of flexibility.

[0141] Example 4

[0142] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0143] Each paper-pressing component of the paper-pressing mechanism is assembled on the front and rear support beams with a linear displacement structure that can move up and down.

[0144] The paper-pressing mechanism's paper-tapping drive assembly consists of a cylinder and a connecting rod. The connecting rod connects the shafts of each paper-tapping assembly in series. The cylinder is fixed to the top of the frame and connected to the connecting rod. During the linear motion of the cylinder, the connecting rod drives the shaft of the paper-tapping assembly to rise and fall within the slide grooves of the front and rear support beams.

[0145] This embodiment is theoretically feasible, but it is prone to impact damage to the folded paper, and it is not conducive to keeping the compacted folded paper flat, and the impact noise is loud.

[0146] Example 5

[0147] The rest of the content of this embodiment is the same as that of embodiment 1, except that:

[0148] The paper feeding mechanism feeds the currently folded paper at a uniform speed, and the feeding speed is controlled so that the currently folded paper enters the carrying mechanism smoothly and effectively.

[0149] The above embodiments are only used to illustrate the present invention and are not intended to limit it.

[0150] Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications can still be made to the above embodiments, or equivalent substitutions can be made to some of the technical features. For example, the number of paper-feeding components and / or paper-feeding drive components of the paper-pressing mechanism can be different, and the lifting structure of the carrying mechanism can be a centrally arranged electric push rod, etc. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the present invention.

Claims

1. An automatic paper stacking device, comprising a frame (1), a paper feeding mechanism (2), and a carrying mechanism (3); The paper feeding mechanism (2) is arranged on the frame (1) and is used to convey the folded paper along the fold width direction so that the folds of the folded paper enter the conveyor in the order of first and last. The carrying mechanism (3) is arranged on the frame (1) and is located downstream of the paper feeding mechanism (2), and is used to stack the folded paper conveyed by the paper feeding mechanism (2); the carrying platform (31) of the carrying mechanism (3) is arranged horizontally along the length direction of the paper feeding port of the paper feeding mechanism (2), and the top surface is flat; Its features are: The stacking device also includes a paper pressing mechanism (4). The paper pressing mechanism (4) is arranged on the frame (1) and is located downstream of the paper feeding mechanism (2) and above the carrying mechanism (3). The paper pressing mechanism (4) rotates to disengage from / contact the carrying platform (31) of the carrying mechanism (3) or the folded paper it carries. During the current paper feeding process of the paper feeding mechanism (2), the paper pressing mechanism (4) rotates and disengages from the carrying platform (31) of the carrying mechanism (3) or the folded paper it carries, leaving a stacking channel for the current paper feeding on the carrying mechanism (3); When the paper feeding mechanism (2) completes the current paper feeding, the paper pressing mechanism (4) rotates and contacts the carrying platform (31) of the carrying mechanism (3) or the folded paper it carries, pressing down the folded paper currently stacked on the carrying mechanism (3); Specifically, the paper pressing mechanism (4) mainly consists of multiple sets of paper-tapping components (43) and paper-tapping drive components (44); Multiple paper-tapping assemblies (43) are arranged at intervals along the length of the paper inlet of the paper feeding mechanism (2). Each paper-tapping assembly (43) is rotatably mounted on a support beam via a rotating shaft (431). The support beam is fixed on the frame (1) along the length of the paper inlet of the paper feeding mechanism (2). Each set of paper-tapping drive components (44) is used to drive at least one set of paper-tapping components (43) to generate a rotational motion; Driven by the corresponding paper-tapping drive component (44), the paper-tapping component (43) rotates to disengage from / contact the support platform (31) of the support mechanism (3) or the folded paper it carries, and the upward resetting and downward pressing of the paper-tapping component (43) form a non-circular rotation arc motion trajectory.

2. The automatic paper stacking device according to claim 1, characterized in that: The multiple paper-tapping components (43) of the paper pressing mechanism (4) are divided into two paper-tapping units, left and right, corresponding to the length direction of the paper inlet of the paper feeding mechanism (2). The rotation direction of each paper-tapping component (43) in the left paper-tapping unit (A) is opposite to the rotation direction of each paper-tapping component (43) in the right paper-tapping unit (B); Furthermore, the downward pressing direction of each paper-pressing component (43) of the left paper-pressing unit (A) and the downward pressing direction of each paper-pressing component (43) of the right paper-pressing unit (B) are respectively moving outward from the center.

3. The automatic paper stacking device according to claim 1 or 2, characterized in that: The paper-tapping assembly (43) mainly consists of a rotating shaft (431), a support frame (432), and a soft paper-tapping head (434); The two ends of the rotating shaft (431) are rotatably mounted on the front support beam (41) and the rear support beam (42) through two sets of bearing assemblies. The front support beam (41) and the rear support beam (42) are arranged along the paper feeding depth direction of the paper feeding mechanism (2). The support frame (432) is connected to the rotating shaft (431) between the front support beam (41) and the rear support beam (42); The soft paper-tapping head (434) is connected to the outside of the rotation position of the support frame (432) and serves as the support platform (31) for rotating away from / contacting the support mechanism (3) or the folded paper it carries.

4. The automatic paper stacking device according to claim 3, characterized in that: The soft paper-tapping head (434) is a flexible and deformable strip plate structure or a brush structure.

5. The automatic paper stacking device according to claim 1, characterized in that: The paper-tapping drive assembly (44) mainly consists of a second drive motor (441), a second active synchronous pulley (442), a second driven synchronous pulley (443), and a second synchronous belt (444); The second drive motor (441) is fixed on the support beam, and the output shaft of the second drive motor (441) is connected to the second active synchronous pulley (442); The driven synchronous pulley two (443) is connected to the rotating shaft (431) of the corresponding paper-tapping assembly (43), and is on the same side and corresponding to the active synchronous pulley two (442); The second synchronous belt (444) is tensioned and fitted onto the second active synchronous pulley (442) and the second driven synchronous pulley (443).

6. The automatic paper stacking device according to claim 1, characterized in that: The carrying platform (31) of the carrying mechanism (3) is a liftable structure, and during the continuous paper feeding process, the thickness of the stacked folded paper gradually decreases from top to bottom. The bearing mechanism (3) mainly consists of a bearing platform (31), two sets of lifting components (33) and a lifting drive component (34); The carrying platform (31) is arranged horizontally along the length of the paper feed mechanism (2), and the two ends of the carrying platform (31) are connected to two sets of lifting components (33) respectively. The lifting assembly (33) mainly consists of a transmission screw (331), a screw nut (332), and at least one guide shaft (334); The transmission screw (331) is vertically mounted on the corresponding part of the frame (1) via two sets of upper and lower bearing assemblies; The inner hole of the lead screw nut (332) is connected to the transmission lead screw (331) by a threaded structure, and the lead screw nut (332) is fixedly connected to the corresponding end of the bearing platform (31); The guide shaft (334) is vertically fixed at the corresponding part of the frame (1), and is arranged at intervals with the transmission screw (331) in the width direction of the bearing platform (31). The guide shaft (334) is movably connected to the corresponding end of the bearing platform (31) through a linear bearing (333). The lifting drive assembly (34) is used to drive the transmission screw (331) of the lifting assembly (33) to generate a rotational action; Driven by the lifting drive assembly (34), the two sets of lifting assemblies (33) rotate synchronously, causing the bearing platform (31) to produce horizontal rising / falling movements.

7. The automatic paper stacking device according to claim 6, characterized in that: The lifting drive assembly (34) mainly consists of a drive motor (341), an active synchronous pulley (342), two driven synchronous pulleys (343), and a synchronous belt (344); The drive motor (341) is fixed on the frame (1), and the output shaft of the drive motor (341) is connected to the active synchronous pulley (342); Two driven synchronous pulleys (343) are connected to the transmission screws (331) of the two sets of lifting components (33), corresponding to the active synchronous pulley (342); The timing belt (344) is tensioned and fitted onto the driving timing pulley (342) and the two driven timing pulleys (343).

8. The automatic paper stacking device according to claim 6, characterized in that: The supporting mechanism (3) also includes an auxiliary platform (32); The auxiliary platform (32) is detachably connected to the support platform (31) on the side opposite to the paper feeding mechanism (2), and the top surface of the auxiliary platform (32) corresponds to the top surface of the support platform (31).

9. The automatic paper stacking device according to claim 1, characterized in that: The paper feeding mechanism (2) divides the paper feeding speed of the current folded paper into two stages: front and back. The transmission speed of the tail section of the folded paper in the back stage is lower than the transmission speed of the head and middle sections of the folded paper in the front stage.

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