A paper sheet supply device

Abstract

The present application relates to a kind of paper sheet feeding device, including first support, fixedly arranged on the U-shaped frame of first support, second support, the feeding mechanism of being arranged on the second support, the push mechanism of being arranged on the U-shaped frame, the detection correction mechanism of being arranged on the first support.The present application realizes automatic feeding by feeding mechanism and push mechanism, then detects paper sheet by detection correction mechanism, if detecting the paper sheet of opposite direction can be automatically corrected, so that the orientation of all paper sheet is consistent, facilitate subsequent assembly to biological sheet clamp.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of feeding, in particular to a paper sheet feeding device. BACKGROUND

[0002] The biological slide holder is assembled by a shell, a glass sheet and a paper sheet. When assembling the biological slide holder, the shell feeding device is used to feed the shell, the glass sheet feeding device is used to feed the glass sheet, and the paper sheet feeding device is used to feed the paper sheet. After feeding, the three products are assembled together by the assembling device, and finally a complete biological slide holder is assembled. However, the existing paper sheet feeding device may cause the opposite orientation of individual paper sheets during feeding, which leads to the failure of assembling the biological slide holder. SUMMARY

[0003] In view of the above problems in the prior art, the present application provides a paper sheet feeding device.

[0004] The technical scheme adopted by the present application to solve the technical problem is: a paper sheet feeding device, comprising a first support, a U-shaped frame fixedly arranged on the first support, a second support fixedly arranged on the U-shaped frame, a feeding mechanism arranged on the second support, a pushing mechanism arranged on the U-shaped frame, and a detection and correction mechanism arranged on the first support; the detection and correction mechanism comprises a first support plate fixedly arranged on the first support, a first sliding groove arranged on the first support plate, a first sliding block slidably arranged on the first sliding groove, a first threaded rod having one end penetratingly arranged on the first support plate and rotatably arranged on the first support plate, a first base fixedly arranged on the first support plate, a first motor arranged on the first base and used to drive the first threaded rod to rotate, a second support plate fixedly arranged on the first sliding block, a second sliding groove arranged on the second support plate, a second sliding block slidably arranged on the second sliding groove, a second threaded rod having one end penetratingly arranged on the second support plate and rotatably arranged on the second support plate, a second base fixedly arranged on the second support plate, and a second motor arranged on the second base and used to drive the second threaded rod to rotate; a rotary table is arranged on the second support; the first threaded rod further penetrates the first sliding block rotatably arranged on the first sliding block, and the second threaded rod further penetrates the second sliding block rotatably arranged on the second sliding block. The present application realizes automatic feeding through the feeding mechanism and the pushing mechanism, and then detects the paper sheets through the detection and correction mechanism. If the paper sheets with opposite orientations are detected, they can be automatically corrected, so that the orientations of all the paper sheets are consistent, which facilitates the subsequent assembly of the biological slide holder.

[0005] Specifically, the second slider is provided with a rotating assembly, the rotating assembly comprises a first plate fixedly arranged on the second slider, a second plate fixedly arranged on the first plate, a third plate fixedly arranged on the second plate, a third base arranged on the third plate, a third motor arranged on the third base, a first shaft with one end arranged on the third motor and rotatably arranged on the third plate, a first connecting rod fixedly sleeved on the first shaft, a third sliding groove arranged on the first plate, a sliding rod slidably arranged on the third sliding groove, an L-shaped plate fixedly arranged on the sliding rod, a sliding rail fixedly arranged on the L-shaped plate, a fourth sliding groove arranged on the sliding rail, a guide rod with one end fixedly arranged on the first connecting rod and the other end slidably arranged on the fourth sliding groove, a round rod rotatably arranged on the L-shaped plate, an annular groove arranged on the second plate, a first sliding piece and a second sliding piece slidably arranged on the annular groove, and a circular ring with one end fixedly arranged on the first sliding piece and the other end fixedly arranged on the second sliding piece; the round rod is slidably arranged on the circular ring.

[0006] Specifically, the rotating assembly further comprises a first gear fixedly sleeved on the first shaft, a second shaft rotatably arranged on the third plate, a second gear fixedly sleeved on the second shaft, a first conveying belt with one end arranged around the first gear and the other end arranged around the second gear, a first guide rod and a second guide rod fixedly arranged on the second shaft, a first sliding plate and a second sliding plate fixedly arranged on the second shaft.

[0007] Specifically, the round rod is fixedly provided with a suction block, a first cavity arranged in the round rod, a second cavity arranged in the suction block, a third sliding plate slidably arranged in the first cavity, a fixed block fixedly arranged in the first cavity, a rod body with one end fixedly arranged on the third sliding plate and slidably arranged on the fixed block, a first spring with one end fixedly arranged on the fixed block and the other end fixedly arranged on the third sliding plate, an electric telescopic rod with one end fixedly arranged on the round rod and the other end fixedly arranged on the rod body, and a plurality of suction holes circumferentially and equidistantly arranged on the suction block.

[0008] Specifically, the circular ring is provided with a first guide groove and a second guide groove, and the first guide groove and the second guide groove are arranged in a cross manner.

[0009] Specifically, the second support is provided with a support plate, the support plate is provided with a first sensor, and the second plate is provided with a second sensor.

[0010] Specifically, the feeding mechanism comprises a limiting plate fixedly arranged on the second support, a first feeding plate and a second feeding plate fixedly arranged on the limiting plate, a first guide groove arranged on the limiting plate, a circular notch arranged on the limiting plate, a second guide groove arranged on the limiting plate, a third guide groove arranged on the first feeding plate, and a fourth guide groove arranged on the second feeding plate.

[0011] Specifically, the pushing mechanism comprises a fourth base fixed on the U-shaped frame, a fourth motor arranged on the fourth base, a driving shaft with one end arranged on the fourth motor and the other end rotatably arranged on the U-shaped frame, and a pushing piece assembly arranged on the driving shaft.

[0012] Specifically, the pushing piece assembly comprises a third supporting plate fixed on the U-shaped frame, a first rotating shaft rotatably arranged on the third supporting plate, a third gear fixedly sleeved on the first rotating shaft, a second transmission belt with one end arranged around the first gear and the other end arranged around the driving shaft, a fifth sliding groove arranged on the second supporting plate, a sliding frame slidably arranged on the fifth sliding groove, a rotating rod rotatably arranged on the sliding frame and rotatably arranged on the third supporting plate, a sixth sliding groove arranged on the rotating rod, a second connecting rod fixedly sleeved on the first rotating shaft, a first sliding rod with one end fixedly arranged on the second connecting rod and the other end slidably arranged on the sixth sliding groove.

[0013] Specifically, the sliding frame is provided with a housing, a pushing block slidably arranged through the housing, a second sliding rod with one end fixedly arranged on the pushing block and the other end slidably arranged through the housing, a second spring with one end fixedly arranged on the pushing block and the other end fixedly arranged on the housing, and an inclined surface arranged on the pushing block.

[0014] The beneficial effects of the present application are:

[0015] Through the feeding mechanism and the pushing mechanism, automatic feeding is realized, and then the paper sheets are detected through the detection and correction mechanism. If the paper sheets with opposite orientations are detected, they can be automatically corrected, so that the orientations of all the paper sheets are consistent, facilitating subsequent assembly of the biological sheet clamp. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further described below in combination with the drawings and examples.

[0017] Figure 1 is a structural schematic diagram of the present application;

[0018] Figure 2 is a partial structural schematic diagram in the present application Figure 1 ;

[0019] Figure 3 is a partial structural schematic diagram in the present application Figure 2 ;

[0020] Figure 4 is a partial structural schematic diagram in the present application Figure 3 ;

[0021] Figure 5 is a partial structural schematic diagram in the present application Figure 4 ;

[0022] Figure 6 is aFigure 5 Enlarged view of point A in the image;

[0023] Figure 7 This is a partial structural illustration of the present invention. Figure 5 ;

[0024] Figure 8 for Figure 7 AA-line structural section view;

[0025] Figure 9 for Figure 8 Enlarged view of point B in the image;

[0026] Figure 10 This is a partial structural illustration of the present invention. Figure 6 ;

[0027] Figure 11 This is a partial structural illustration of the present invention. Figure 7 ;

[0028] Figure 12 This is a partial structural illustration of the present invention. Figure 8 ;

[0029] Figure 13 for Figure 12 The right view;

[0030] Figure 14 for Figure 13 AA-line structural section view;

[0031] Figure 15 This is a schematic diagram of the ring structure in this invention. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0033] like Figures 1-15As shown, the paper feeding device of the present invention includes a first support 1, a U-shaped frame 2 fixedly mounted on the first support, a second support 3 fixedly mounted on the U-shaped frame, a feeding mechanism 4 mounted on the second support, a pushing mechanism 5 mounted on the U-shaped frame, and a detection and correction mechanism 6 mounted on the first support; the detection and correction mechanism 6 includes a first support plate 61 fixedly mounted on the first support, a first sliding groove 62 mounted on the first support plate, a first slider 63 slidably mounted on the first sliding groove, a first threaded rod 64 with one end passing through and rotatably mounted on the first support plate, a first base 65 fixedly mounted on the first support plate, and a... The invention comprises a first motor 66 mounted on a first base and used to drive the first threaded rod to rotate; a second support plate 67 fixedly mounted on a first slider; a second slide groove 68 mounted on the second support plate; a second slider 69 slidably mounted on the second slide groove; a second threaded rod 610 rotatably mounted on the second support plate with one end passing through it; a second base 611 fixedly mounted on the second support plate; and a second motor 612 mounted on the second base and used to drive the second threaded rod to rotate. A turntable 8 is provided on the second bracket. The first threaded rod also rotatably passes through the first slider, and the second threaded rod also rotatably passes through the second slider. This invention achieves automatic feeding through a feeding mechanism and a pushing mechanism, and then detects and corrects the paper sheets through a detection and correction mechanism. If a paper sheet with an opposite orientation is detected, it can be automatically corrected to ensure that all paper sheets have the same orientation, facilitating subsequent assembly of the biological sheet clamp. When the paper is pushed to the other side of the limiting plate by the pushing mechanism, the notch on the paper corresponds to the circular notch on the limiting plate. Then, the second motor is driven to rotate, which drives the second threaded rod to rotate, causing the second slider to slide down on the second slide groove. This allows the rotating component to pick up the corresponding paper below. Then, the second motor is driven to rotate in the opposite direction, causing the rotating component to move upward a certain distance. At this time, the first and second sensors can sense the circular notch, indicating that the paper is facing correctly. If the first and second sensors cannot sense the circular notch, it means that the paper is facing incorrectly. An incorrect orientation will drive the third motor to work and correct the paper, ensuring that all paper in the same group are facing the same direction. After the paper is facing the same direction, the first motor is driven, which drives the first threaded rod to rotate and causes the first slider to slide on the first slide groove. This moves the second support plate and the rotating component to the top of the turntable, and the second motor is driven again to place the paper on the turntable. At this time, all the paper on the turntable is qualified and can be used for subsequent assembly of the biological paper clip.

[0034] Specifically, the second slider 69 is provided with a rotating assembly 7, which includes a first plate 71 fixedly mounted on the second slider, a second plate 72 fixedly mounted on the first plate, a third plate 73 fixedly mounted on the second plate, a third base 74 mounted on the third plate, a third motor 75 mounted on the third base, a first shaft 76 with one end mounted on the third motor and rotatably mounted on the third plate, a first connecting rod 77 with one end fixedly sleeved on the first shaft, a third sliding groove 78 mounted on the first plate, a sliding rod 79 slidably mounted on the third sliding groove, and a fixed rod on the sliding rod. The rotating assembly 7 comprises an L-shaped plate 710, a slide rail 711 fixedly mounted on the L-shaped plate, a fourth slide groove 712 mounted on the slide rail, a guide rod 713 with one end fixed to the first connecting rod and the other end slidably mounted on the fourth slide groove, a round rod 714 rotatably mounted on the L-shaped plate, an annular groove 715 mounted on the second plate, a first sliding piece 716 and a second sliding piece 717 slidably mounted on the annular groove, and a circular ring 718 with one end fixed to the first sliding piece and the other end fixed to the second sliding piece; the round rod is slidably mounted on the circular ring; and multiple rotating assemblies 7 are provided at equal intervals. Because the gaps between adjacent paper pieces in the same group are small, traditional detection equipment will directly reject paper pieces facing the opposite direction when it detects them, and then add a new paper piece. This is time-consuming and directly affects the assembly efficiency of the subsequent biological sheet clips. However, the rotating component in this invention can directly rotate paper pieces facing the opposite direction when the gaps between adjacent paper pieces are small, so that they face the correct direction, thereby improving the assembly efficiency of the subsequent biological sheet clips.

[0035] Specifically, the rotating assembly 7 further includes a first gear 719 fixedly sleeved on the first shaft, a second shaft 720 rotatably mounted on the third plate, a second gear 721 fixedly sleeved on the second shaft, a first conveyor belt 722 with one end wound around the first gear and the other end wound around the second gear, a first guide rod 723 and a second guide rod 724 fixedly mounted on the second shaft, and a first sliding plate 725 and a second sliding plate 726 fixedly mounted on the second shaft; the first guide rod and the second guide rod are symmetrically arranged, and the first sliding plate and the second sliding plate are symmetrically arranged. When the third motor rotates, it drives the first shaft to rotate, which in turn drives the first connecting rod to rotate around the first shaft, so that the guide rod first slides in the fourth slide groove and drives the slide rail, slide rod, L-shaped plate, and round rod to slide on the third slide groove. When the first shaft rotates, it drives the first gear to rotate, which in turn drives the first conveyor belt and the second gear to rotate, which in turn drives the second shaft to rotate, so that the first guide rod, the second guide rod, the first sliding plate, and the second sliding plate all rotate around the second shaft. When the first guide rod rotates to the first guide groove, the guide of the first guide groove causes the round rod to rotate. The ring, the first slider, and the second slider rotate 180 degrees on the annular groove. When the ring rotates 180 degrees, it also drives the round rod to rotate 180 degrees, that is, the paper rotates 180 degrees, correcting the orientation of the paper. Since the gap between adjacent paper pieces in the same group is small, when the third motor rotates one revolution, it is equivalent to the round rod first moving downward a distance, then rotating 180 degrees, and then moving upward. This avoids the round rod from hitting adjacent paper pieces when it drives the paper pieces to rotate, and thus enables timely correction when paper pieces with opposite orientations are detected, ensuring that all paper pieces have the same orientation.

[0036] Specifically, the circular rod 714 is fixedly provided with a suction block 7131, a first cavity 7132 inside the circular rod, a second cavity 7133 inside the suction block, a third sliding plate 7134 slidably disposed in the first cavity, a fixing block 7135 fixedly disposed in the first cavity, a rod 7136 with one end fixed to the third sliding plate and passing through the fixing block, a first spring 7137 with one end fixed to the fixing block and the other end fixed to the third sliding plate, an electric telescopic rod 7138 with one end fixed to the circular rod and the other end fixed to the rod, and a plurality of suction holes 7139 disposed on the suction block and arranged at equal intervals around the circumference. When the paper is being sucked up, the electric telescopic rod is shortened, causing the rod and the third slide plate to move upward. At the same time, the first spring is shortened, which is equivalent to creating a suction state in the first cavity, and the paper is sucked up through multiple suction holes. When the paper is placed on the turntable, the electric telescopic rod is extended, and the third slide plate moves downward. The gas in the first cavity is blown out through multiple suction holes, the paper is separated from the suction plate, and the paper falls onto the turntable.

[0037] Specifically, the ring 718 is provided with a first guide groove 7171 and a second guide groove 7172, which are arranged intersectingly. The ring can rotate through the cooperation of the first guide groove, the second guide groove, the first guide rod, and the second guide rod.

[0038] Specifically, the second bracket 3 is provided with a support plate 31, the support plate is provided with a first sensor 32, and the second plate 72 is provided with a second sensor 727.

[0039] Specifically, the feeding mechanism 4 includes a limiting plate 41 fixedly mounted on the second bracket, a first feeding plate 42 and a second feeding plate 43 fixedly mounted on the limiting plate, a first guide groove 44 on the limiting plate, a circular notch 45 on the limiting plate, a second guide groove 46 on the limiting plate, a third guide groove 47 on the first feeding plate, and a fourth guide groove 48 on the second feeding plate; the feeding mechanism 4 has multiple guide grooves at equal intervals. Multiple pieces of paper can be placed in the third and fourth guide grooves initially, with the bottom piece of paper falling onto the first guide groove of the limiting plate; the second and fourth guide grooves facilitate the operation of the subsequent pushing mechanism.

[0040] Specifically, the pushing mechanism 5 includes a fourth base 51 fixed on the U-shaped frame, a fourth motor 52 mounted on the fourth base, a drive shaft 53 with one end mounted on the fourth motor and the other end rotatably mounted on the U-shaped frame, and pusher assemblies 54 mounted on the drive shaft; multiple pusher assemblies 54 are arranged at equal intervals. When the fourth motor rotates, it drives the drive shaft to rotate, thereby driving multiple pusher assemblies to work, and the pusher assemblies push their corresponding paper pieces to the other side of the limiting plate.

[0041] Specifically, the pusher assembly 54 includes a third support plate 541 fixedly mounted on a U-shaped frame, a first rotating shaft 542 rotatably mounted on the third support plate, a third gear 543 fixedly sleeved on the first rotating shaft, a second conveyor belt 544 with one end wound around the first gear and the other end wound around the drive shaft, a fifth sliding groove 545 mounted on a second bracket, a sliding frame 546 slidably mounted on the fifth sliding groove, a rotating rod 547 rotatably mounted on the sliding frame and rotatably mounted on the third support plate, a sixth sliding groove 548 mounted on the rotating rod, a second connecting rod 549 fixedly sleeved on the first rotating shaft, and a first sliding rod 550 fixedly mounted on the second connecting rod and slidably mounted on the sixth sliding groove; the rotating rod 547 is telescopic. When the drive shaft rotates, it drives the second conveyor belt to rotate, which in turn drives the third gear and the first rotating shaft to rotate, which in turn causes the second connecting rod to rotate. When the second connecting rod rotates, it drives the first sliding rod to slide on the sixth sliding groove, and further causes the rotating rod to rotate. While the rotating rod rotates, it drives the sliding frame to slide on the fifth sliding groove. And the sliding frame moves back and forth once for every revolution of the first rotating shaft.

[0042] Specifically, the sliding frame 546 is provided with a housing 5461, through which a push block 5462 is slidably disposed on the housing, a second sliding rod 5463 is fixed at one end on the push block and slidably disposed on the housing, and a second spring 5464 is fixed at one end on the push block and at the other end on the housing. The push block is provided with an inclined surface 5465. When the sliding frame slides on the fifth sliding groove, it also drives the housing to move. At this time, the push block on the housing pushes the paper piece to move and pushes the paper piece to the other side of the limiting plate. Then the paper piece on top automatically falls down. Then, when the housing and the push block move back, due to the limitation of the weight of the paper piece on top and the guidance of the inclined surface on the push block, the push block moves down a certain distance. At this time, the second sliding rod also moves down a certain distance. At this time, the second spring shortens. When the push block moves to the other side of the paper piece (when the housing completes one reciprocating movement), the push block is freed from the limitation of the weight of the paper piece on top. At this time, the push block and the second sliding rod are reset by the action of the second spring, which facilitates the next push of the paper piece.

[0043] The first to the fourth motors are all commercially available, and the electric telescopic pole is existing technology, which will not be elaborated on here.

[0044] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0045] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A paper feeding device, characterized in that: The system includes a first support (1), a U-shaped frame (2) fixed on the first support, a second support (3) fixed on the U-shaped frame, a feeding mechanism (4) on the second support, a pushing mechanism (5) on the U-shaped frame, and a detection and correction mechanism (6) on the first support. The detection and correction mechanism (6) includes a first support plate (61) fixed on the first support, a first slide groove (62) on the first support plate, a first slider (63) slidably disposed on the first slide groove, a first threaded rod (64) rotatably disposed on the first support plate with one end through it, a first base (65) fixed on the first support plate, and a first base (66) disposed on the first base. The second bracket includes a first motor (66) for driving the first threaded rod to rotate, a second support plate (67) fixed on the first slider, a second slide groove (68) on the second support plate, a second slider (69) slidably mounted on the second slide groove, a second threaded rod (610) rotatably mounted on the second support plate with one end passing through it, a second base (611) fixed on the second support plate, and a second motor (612) on the second base for driving the second threaded rod to rotate. A turntable (8) is provided on the second bracket. The first threaded rod is also rotatably mounted on the first slider, and the second threaded rod is also rotatably mounted on the second slider. The second slider (69) is provided with a rotating assembly (7), which includes a first plate (71) fixedly mounted on the second slider, a second plate (72) fixedly mounted on the first plate, a third plate (73) fixedly mounted on the second plate, a third base (74) mounted on the third plate, a third motor (75) mounted on the third base, a first shaft (76) with one end mounted on the third motor and rotatably mounted on the third plate, a first connecting rod (77) with one end fixedly sleeved on the first shaft, a third slide groove (78) mounted on the first plate, and a slide rod (79) slidably mounted on the third slide groove. 9) An L-shaped plate (710) fixed on the slide rod, a slide rail (711) fixed on the L-shaped plate, a fourth slide groove (712) on the slide rail, a guide rod (713) with one end fixed on the first connecting rod and the other end slidably disposed on the fourth slide groove, a round rod (714) rotatably disposed on the L-shaped plate, an annular groove (715) on the second plate, a first slide piece (716) and a second slide piece (717) slidably disposed on the annular groove, and a circular ring (718) with one end fixed on the first slide piece and the other end fixed on the second slide piece; the round rod is slidably disposed on the circular ring.

2. The paper feeding device according to claim 1, characterized in that: The rotating assembly (7) further includes a first gear (719) fixedly sleeved on the first shaft, a second shaft (720) rotatably mounted on the third plate, a second gear (721) fixedly sleeved on the second shaft, a first conveyor belt (722) with one end wound around the first gear and the other end wound around the second gear, a first guide rod (723) and a second guide rod (724) fixedly mounted on the second shaft, and a first slide plate (725) and a second slide plate (726) fixedly mounted on the second shaft.

3. The paper feeding device according to claim 2, characterized in that: The circular rod (714) is fixedly provided with a suction block (7131), a first cavity (7132) inside the circular rod, a second cavity (7133) inside the suction block, a third sliding plate (7134) slidably disposed in the first cavity, a fixing block (7135) fixedly disposed in the first cavity, a rod (7136) fixed at one end on the third sliding plate and slidably disposed on the fixing block, a first spring (7137) fixed at one end on the fixing block and at the other end on the third sliding plate, an electric telescopic rod (7138) fixed at one end on the circular rod and at the other end on the rod, and a plurality of suction holes (7139) disposed on the suction block and arranged at equal intervals around the circumference.

4. A paper feeding device according to claim 3, characterized in that: The ring (718) is provided with a first guide groove (7171) and a second guide groove (7172), and the first guide groove (7171) and the second guide groove (7172) are arranged to cross each other.

5. A paper feeding device according to claim 4, characterized in that: The second bracket (3) is provided with a support plate (31), the support plate is provided with a first sensor (32), and the second plate (72) is provided with a second sensor (727).

6. The paper feeding device according to claim 1, characterized in that: The feeding mechanism (4) includes a limiting plate (41) fixed on the second bracket, a first feeding plate (42) and a second feeding plate (43) fixed on the limiting plate, a first guide groove (44) on the limiting plate, a circular notch (45) on the limiting plate, a second guide groove (46) on the limiting plate, a third guide groove (47) on the first feeding plate, and a fourth guide groove (48) on the second feeding plate.

7. A paper feeding device according to claim 1, characterized in that: The pushing mechanism (5) includes a fourth base (51) fixed on the U-shaped frame, a fourth motor (52) on the fourth base, a drive shaft (53) with one end on the fourth motor and the other end rotatably mounted on the U-shaped frame, and a pusher assembly (54) on the drive shaft.

8. A paper feeding device according to claim 7, characterized in that: The pusher assembly (54) includes a third support plate (541) fixed on a U-shaped frame, a first rotating shaft (542) rotatably mounted on the third support plate, a third gear (543) fixedly mounted on the first rotating shaft, a second conveyor belt (544) with one end wound around the first gear and the other end wound around the drive shaft, a fifth slide groove (545) mounted on a second bracket, a sliding frame (546) slidably mounted on the fifth slide groove, a rotating rod (547) rotatably mounted on the sliding frame and rotatably mounted on the third support plate, a sixth slide groove (548) mounted on the rotating rod, a second connecting rod (549) fixedly mounted on the first rotating shaft, and a first sliding rod (550) fixedly mounted on the second connecting rod and slidably mounted on the sixth slide groove; the rotating rod (547) is telescopic.

9. A paper feeding device according to claim 8, characterized in that: The sliding frame (546) is provided with a housing (5461), through which a push block (5462) is slidably disposed on the housing, a second sliding rod (5463) is fixed at one end on the push block and slidably disposed on the housing, a second spring (5464) is fixed at one end on the push block and at the other end on the housing, and the push block is provided with an inclined surface (5465).

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