Paper feeder

Abstract

The present application relates to a paper feeder, comprising a stacking plate for stacking paper. The stacking plate comprises a plate body, a slider, and an elastic member. A groove is provided on the upper surface of the plate body, the depth of the groove being no less than the height of the slider. The slider slides vertically and is embedded in the groove. The upper surface of the slider supports the paper stack. One end of the elastic member is connected to the plate body, and the other end of the elastic member is connected to the slider. When the slider only supports the paper stack, the elastic member causes the upper end of the slider to extend out of the groove. When new paper is stacked on the stacking plate, the elastic member causes the upper end of the slider to extend out of the groove. The stacking plate and the new paper stack rise until the new paper stack presses against the insertion roller. The weight of the insertion roller reduces the length of the slider's upper end extending out of the groove. When the insertion roller is pulled out, the weight of the insertion roller cannot act on the slider and the elastic member. The elastic member causes the slider's upper end to extend out of the groove, thereby shortening the distance the remaining paper stack falls downward, thereby shortening the time required for the top of the paper stack to rise to a specified height.

Description

Technical Field

[0001] The present application relates to the field of paper conveying equipment, and in particular to a paper feeder. Background Art

[0002] During the printing process of a sheet-fed printing press, the paper feeder delivers paper to the printing unit one by one. After the paper on the paper feeder table is delivered, a new paper pile should be replaced. In order to reduce the machine's downtime, a non-stop paper feeding device is set on the paper feeder.

[0003] Two independent drive motors and two sets of transmission devices are used to control the movement of the main paper pile and the auxiliary paper pile respectively. The working process is as follows:

[0004] 1. Paper is stacked on the pallet. The main paper pile drive motor rotates forward, driving the pallet upward through the main paper pile transmission device. The main paper pile is then lifted to complete the paper conveying. At the same time, the auxiliary paper pile drive motor rotates reverse, driving the roller frame downward through the auxiliary paper pile transmission device.

[0005] 2. When the roller rack is lower than the stacking plate, insert the rollers horizontally into the grooves on the upper surface of the stacking plate. At this time, the rollers are located directly below the paper pile, and both ends of the rollers extend out of the grooves.

[0006] 3. The auxiliary paper pile drive motor rotates forward, driving the inserting roller frame to rise through the auxiliary paper pile transmission device, and causing the inserting roller frame to lift the inserting rollers. Multiple inserting rollers synchronously move upward and out of the slots to lift the remaining paper pile. At this time, the auxiliary paper pile rises to complete the paper conveying.

[0007] 4. The main paper pile drive motor reverses, driving the empty stacking plate to the lowest position through the main paper pile transmission device, and new paper is stacked on the stacking plate;

[0008] 5. The main paper pile drive motor rotates forward, driving the stacking plate and the new paper pile to rise through the main paper pile transmission device. When the new paper pile rises to the point where it slightly presses against the inserting roller, the main paper pile is switched to rising to complete the paper conveying. At the same time, the auxiliary paper pile drive motor rotates reversely, driving the inserting roller frame to descend through the auxiliary paper pile transmission device, so that the inserting roller frame is separated from the inserting roller.

[0009] 6. Finally, pull out the insert roller so that the remaining paper pile overlaps with the new paper pile on the pallet.

[0010] Repeat the above process to complete the non-stop paper feeding work of the main and auxiliary paper piles.

[0011] With respect to the above-mentioned related technologies, the inventors believe that the insertion roller creates a gap between the remaining paper pile and the new paper pile on the pallet (the height of the gap is equal to the diameter of the insertion roller). When the insertion roller is pulled out, the remaining paper pile located above falls downward, causing the top height of the paper pile to drop. It takes several seconds for the main paper pile drive motor to operate so that the top height of the paper pile rises to the specified height again. During these few seconds, the paper feeder cannot output paper. Summary of the Invention

[0012] In order to shorten the time required for the top height of the paper pile to rise back to a specified height, the present application provides a paper feeder.

[0013] The present application provides a paper feeder, which adopts the following technical solution:

[0014] A paper feeder includes a stacking plate for stacking paper sheets, the stacking plate including a plate body, a slider, and an elastic member. A slide groove is provided on the upper surface of the plate body, the depth of the slide groove being not less than the height of the slider. The slider is vertically slidably embedded in the slide groove. The upper surface of the slider is used to support the paper stack. One end of the elastic member is connected to the plate body, and the other end of the elastic member is connected to the slider.

[0015] When the slider only supports the paper stack, the elastic member causes the upper end of the slider to extend out of the slide slot;

[0016] The sliders are arranged in plurality at intervals; when the upper ends of the plurality of sliders extend out of the slide groove, the surfaces of the adjacent sliders and the upper surface of the plate body are combined to form an embedding groove, and the embedding groove is used for embedding the inserting roller.

[0017] By adopting the above technical solution, new paper is stacked on the stacking plate. At this time, the slider only supports the paper stack, and the elastic member causes the upper end of the slider to extend out of the chute. Subsequently, the stacking plate and the new paper stack are driven to rise. The new paper stack rises to support the insertion roller. The slider then supports both the paper stack and the insertion rod. The gravity of the insertion rod causes the elastic member to further deform, and the length of the slider's upper end extending out of the chute is reduced.

[0018] Finally, when the insertion roller is pulled out, the gravity of the insertion rod cannot act on the slider and the elastic member, the force on the slider and the elastic member is reduced, and the elastic member increases the length of the upper end of the slider extending out of the slide slot, thereby shortening the distance that the remaining paper pile above falls downward, thereby shortening the time required for the top height of the paper pile to rise to the specified height again.

[0019] At the same time, the slider only supports the paper pile, and the elastic member makes the upper end of the slider extend out of the slide groove to form an embedding groove for the insertion roller to embed, so as to realize the non-stop paper feeding of the main and auxiliary paper piles.

[0020] Preferably, a guide surface is provided on the lower surface of the inserting roller, and an angle exists between the guide surface and the axis of the inserting roller.

[0021] By adopting the above technical solution, the inserting roller is configured to have one end larger than the other. Firstly, this facilitates inserting the inserting roller into the groove on the upper surface of the pallet. Secondly, when the new paper pile rises to slightly press against the inserting roller, the distance between the new paper pile and the remaining paper pile gradually increases from small to large. Furthermore, when the large end of the inserting roller is grasped to remove the inserting roller, the distance between the new paper pile and the remaining paper pile gradually decreases, thereby controlling the degree of bending of the paper at the end of the inserting roller and helping to keep the paper flat. Thirdly, the force exerted by the paper on the inserting roller between the paper and the guide surface is perpendicular to the guide surface, thereby generating a force component along the axial direction of the inserting roller, which facilitates the removal of the inserting roller.

[0022] Preferably, it further comprises a roller inserting frame, wherein the upper surface of the roller inserting frame is provided on a supporting surface, and the supporting surface is used for the guide surface to be in contact with;

[0023] When the guiding surface is in contact with the lifting surface, the axis of the inserting roller is horizontal.

[0024] By adopting the above technical solution, when the insertion roller frame holds up the insertion roller, the axis of the insertion roller is horizontal, and the upper surface of the insertion roller is horizontal, so that the remaining paper pile on the insertion roller is in a horizontal state, and the paper feeder can operate normally and output paper.

[0025] Preferably, corresponding to each of the sliders, a plurality of the elastic members are provided at intervals, and the plurality of the elastic members are distributed along the length direction of the slider.

[0026] By adopting the above technical solution, the arrangement of multiple elastic members facilitates the tilting of the current slider, that is, when the new paper pile rises to slightly press against the insertion roller, the slider will tilt accordingly because the insertion roller is larger at one end and smaller at the other end, and the slider will be parallel to the guide surface of the insertion roller, so that the new paper pile fits the guide surface.

[0027] Preferably, the stacking plate further comprises a supporting plate located above the plate body, the supporting plate being vertically slidably connected to the plate body, the supporting plate being provided with a through slot which vertically penetrates the supporting plate, and the slot wall of the through slot being used for sliding engagement of the slider;

[0028] When the lower surface of the supporting plate is in contact with the upper surface of the plate body and the slider only supports the paper stack, the elastic member enables the upper end of the slider to be higher than the upper surface of the supporting plate.

[0029] By adopting the above technical solution, before placing the new paper stack on the pallet, the support plate is moved so that the upper surface of the support plate is flush with the upper surface of the slider, and a pad can be embedded between the support plate and the plate body; then the new paper stack is placed on the pallet, so that the height of the upper surface of the pallet (the upper surface of the support plate) remains stable during the placement of the new paper stack.

[0030] Preferably, it further comprises a frame, the plate body is connected to the frame in a vertical sliding manner, and the supporting plate is slidably fitted to the frame to form a friction pair.

[0031] By adopting the above technical solution, during the upward movement of the plate body, the friction between the frame and the supporting plate causes the supporting plate to fit the upper surface of the plate body, so that the upper end of the slider is higher than the upper surface of the supporting plate;

[0032] During the downward movement of the plate body, the friction between the frame and the supporting plate causes the supporting plate to separate from the upper surface of the plate body, making it easier to embed the pad between the supporting plate and the plate body so that the upper surface of the supporting plate is flush with the upper surface of the slider.

[0033] Preferably, the horizontal cross-sectional area of ​​the slider decreases from top to bottom;

[0034] When the groove wall of the through groove fits the side surface of the slider, the upper surface of the supporting plate is not lower than the upper end of the slider.

[0035] By adopting the above technical solution, during the downward movement of the plate body, the friction between the frame and the supporting plate causes the supporting plate to separate from the upper surface of the plate body, that is, the supporting plate has a tendency to move upward relative to the plate body until the groove wall of the through groove fits the side surface of the slider. Then, the interaction force between the groove wall of the through groove and the side surface of the slider enables the supporting plate to overcome the friction between the frame and the supporting plate and move downward, that is, the supporting plate moves downward as the plate body moves downward, and the upper surface of the supporting plate is flush with the upper end of the slider.

[0036] Preferably, it further comprises a frame, the plate body is vertically slidably connected to the frame, one end of the supporting plate extends out of the plate body in the horizontal direction, and the frame is provided with a supporting surface;

[0037] When the plate body moves to the lowest position and the lower surface of the supporting plate is in contact with the supporting surface, the upper surface of the supporting plate is not lower than the upper end of the slider.

[0038] By adopting the above technical solution, when the plate body moves to the lowest position, the support surface is used to prevent the supporting plate from moving downward, thereby making the upper surface of the supporting plate flush with the upper surface of the slider.

[0039] Preferably, the frame includes a column, a support block, a positioning block and a reset drive component, the column is vertically arranged, the support block is connected to the column in a sliding manner in the horizontal direction, the upper and lower ends of the support block along one end of its own sliding direction are provided with guide surfaces, and the guide surfaces are used for the edge of the plate body to slide and abut; the positioning block is fixedly connected to the support block, and the positioning block is provided with a positioning groove at one end along the sliding direction of the support block, and the positioning groove is used for the edge of the support plate to be embedded, and the reset drive component makes the support block tend to approach the center of the plate body.

[0040] By adopting the above technical solution, during the downward movement of the plate body, the lower edge of the plate body slides against the guide surface to make the support block move horizontally until the plate body moves down below the support block. At this time, the plate body stops moving, and the supporting plate moves down with the plate body to face the positioning block; the reset drive member drives the supporting block to reset, and at the same time, the positioning block moves with the support block and approaches the center of the supporting plate, that is, the positioning groove is sleeved to the edge of the supporting plate, thereby limiting the upward and downward movement of the supporting plate;

[0041] When the plate body moves upward, the upper edge of the plate body slides against the guide surface to make the support block move horizontally. At this time, the positioning block moves away from the supporting plate, and the plate body continues to move upward to be higher than the support block, and the reset drive member drives the support block to reset.

[0042] In summary, this application includes at least one of the following beneficial technical effects:

[0043] 1. New paper is stacked on the pallet. At this time, the slider only supports the paper stack, and the elastic member causes the upper end of the slider to extend out of the chute. Subsequently, the pallet and the new paper stack are driven to rise. When the new paper stack rises to support the insertion roller, the slider supports both the paper stack and the insertion rod. The weight of the insertion rod causes the elastic member to further deform, reducing the length of the slider's upper end extending out of the chute. Finally, when the insertion roller is pulled out, the weight of the insertion rod cannot act on the slider and the elastic member. The force on the slider and the elastic member is reduced, and the elastic member causes the upper end of the slider to extend out of the chute. This shortens the distance the remaining paper stack above falls downward, thereby shortening the time required for the top of the paper stack to rise to the specified height.

[0044] 2. An angle is formed between the guide surface and the axis of the insertion roller, so that the insertion roller is larger at one end and smaller at the other end. First, this facilitates inserting the insertion roller into the groove on the upper surface of the pallet plate. Second, when the new paper pile rises to slightly press against the insertion roller, the distance between the new paper pile and the remaining paper pile gradually increases from small to large. When the large end of the insertion roller is grasped to pull out the insertion roller, the distance between the new paper pile and the remaining paper pile gradually decreases, thereby controlling the degree of bending of the paper at the end of the insertion roller and facilitating the flatness of the paper. Third, the force exerted by the paper on the insertion roller between the paper and the guide surface is perpendicular to the guide surface, thereby generating a force component along the axial direction of the insertion roller, which facilitates the extraction of the insertion roller.

[0045] 3. Before placing new paper on the pallet, move the support plate so that the upper surface of the support plate is flush with the upper surface of the slider, and insert a pad between the support plate and the plate body; then place the new paper on the pallet so that the height of the upper surface of the pallet (the upper surface of the support plate) remains stable during the placement of the new paper pile. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the overall structure of the paper feeder.

[0047] Figure 2 It is a structural diagram of the stacking plate, inserting rollers and inserting roller frames.

[0048] Figure 3 It is a cross-sectional view of the stacking plate.

[0049] Figure 4 It is a schematic diagram of the connection between the driving device and the stacking plate.

[0050] Figure 5 It is a schematic diagram of the connection between another driving device and the roller frame.

[0051] Figure 6 This is a schematic diagram of the stacking plate moving downward.

[0052] Figure 7 It is a schematic diagram of the state where the stacking plate moves to the lowest position.

[0053] Explanation of the accompanying reference numerals: 1. Frame; 11. Column; 111. Groove; 12. Support block; 121. Guide surface; 122. Support surface; 13. Positioning block; 131. Positioning groove; 14. Reset drive member; 15. Friction member; 2. Stacking plate; 21. Plate body; 211. Slide groove; 22. Slider; 23. Elastic member; 24. Embedded groove; 25. Support plate; 251. Through groove; 3. Driving device; 31. Driving motor; 32. Transmission mechanism; 321. Synchronous belt transmission mechanism; 322. Transmission shaft; 323. Intermediate shaft; 324. Gear; 325. Sprocket; 326. Chain; 327. Balance block; 4. Roller frame; 41. Lifting surface; 42. Avoidance groove; 5. Roller; 51. Guide surface; 6. Feeder head. DETAILED DESCRIPTION

[0054] The following is combined with Figure 1-7 This application is described in further detail.

[0055] Reference Figure 1 The embodiment of the present application discloses a paper feeder, comprising a frame 1 and a stacking plate 2. The stacking plate 2 moves vertically relative to the frame 1. The stacking plate 2 is used for stacking paper.

[0056] Reference Figure 2 The stacking plate 2 includes a plate body 21, a slider 22, and an elastic member 23. The plate body 21 is arranged horizontally, and a plurality of slide grooves 211 are provided at intervals on the upper surface of the plate body 21. The number of sliders 22 is equal to the number of slide grooves 211. The sliders 22 slide vertically and are embedded in the slide grooves 211, and the sliders 22 correspond to the slide grooves 211 one by one. At the same time, the height of the sliders 22 is no greater than the depth of the slide grooves 211.

[0057] The elastic member 23 can be a spring, and the lower end of the spring is fixedly connected to the bottom of the chute 211, and the upper end of the spring is fixedly connected to the lower surface of the slider 22. The fixed connection can be achieved by welding, gluing, etc.

[0058] Reference Figure 2 and Figure 3 The slider 22 is elongated, and its horizontal cross-sectional area decreases from top to bottom. In this embodiment, the slider 22 has an isosceles trapezoidal cross-section. Furthermore, when the side surface of the slider 22 (the waist of the isosceles trapezoid) fits against the wall of the chute 211, a space exists between the bottom surface of the slider 22 and the bottom of the chute 211 for accommodating the elastic member 23.

[0059] Reference Figure 2 , corresponding to each chute 211, multiple elastic members 23 are provided; and the multiple elastic members 23 in each chute 211 are distributed along the length of the chute 211. In this embodiment, corresponding to each chute 211, three elastic members 23 are provided; and the three elastic members 23 are respectively located at both ends and the middle of the chute 211 in the length direction.

[0060] Meanwhile, when only the paper stack is placed on the pallet plate 2, the upper surface of the slider 22 supports the paper stack, and the elastic member 23 undergoes elastic deformation. At this time, the upper end of the slider 22 still extends upwardly out of the slide slot 211. In other words, when the pallet plate 2 only supports the paper stack, the upper surface of the slider 22 contacts the paper stack, and the paper stack does not contact the upper surface of the plate body 21.

[0061] Reference Figure 1 and Figure 4 The paper feeder further includes a drive device 3. The drive device 3 is used to drive the stacking plate 2 to rise or move downward. The drive device 3 includes a drive motor 31 and a transmission mechanism 32. The drive motor 31 rotates forward, driving the stacking plate 2 to rise through the transmission mechanism 32.

[0062] In this embodiment, the transmission mechanism 32 includes two sets of synchronous belt transmission mechanisms 321, two transmission shafts 322, an intermediate shaft 323, a pair of externally meshing gears 324, four sprockets 325, four chains 326 and four balancing blocks 327.

[0063] The motor housing of the drive motor 31 is fixedly connected to the frame 1. The motor shaft of the drive motor 31, two transmission shafts 322 and an intermediate shaft 323 are all arranged horizontally and parallel to each other. The two transmission shafts 322 and the intermediate shaft 323 are all connected to the frame 1 for rotation around their own axes.

[0064] Power is transmitted between the motor shaft of the drive motor 31 and the first transmission shaft 322 via a first synchronous belt drive mechanism 321. Power is transmitted between the first transmission shaft 322 and the intermediate shaft 323 via a second synchronous belt drive mechanism 321. Power is transmitted between the intermediate shaft 323 and the second transmission shaft 322 via a pair of externally meshing gears 324. The first and second sprockets 325 are coaxially fixedly connected to the first transmission shaft 322; the third and fourth sprockets 325 are coaxially fixedly connected to the second transmission shaft 322.

[0065] The sprocket 325, chain 326, and counterweight 327 correspond to each other. One end of the chain 326 is connected to the plate 21, and the other end of the chain 326 passes upward between the two transmission shafts 322 and then around the top of the sprocket 325. The other end of the chain 326 is connected to the counterweight 327. The connection between the chain 326 and the plate 21 and between the chain 326 and the counterweight 327 can be fixed or hinged. Four chains 326 are connected to the four corners of the plate 21.

[0066] Reference Figure 5 , the paper feeder also includes a roller inserting frame 4 and a roller inserting 5. The roller inserting frame 4 moves vertically.

[0067] The inserting roller 5 is shaped with one end larger than the other along its length. The lower surface of the inserting roller 5 serves as a guide surface 51. The upper surface of the inserting roller frame 4 is provided with a support surface 41, which is adapted to engage with the guide surface 51. When the guide surface 51 engages with the support surface 41, the upper surface of the inserting roller 5 is horizontal.

[0068] In one embodiment, the inserting roller 5 may be based on a cylinder with a portion cut off, and the cut surface is the guide surface 51 , and an angle exists between the guide surface 51 and the axis of the inserting roller 5 .

[0069] In this embodiment, the inserting roller 5 is based on a quadrangular prism with a portion cut away, and the cut surface is the guiding surface 51 .

[0070] Reference Figure 2 and Figure 3 When the slider 22 only supports the paper stack, the elastic member 23 causes the upper end of the slider 22 to extend out of the slide slot 211. At this time, the surfaces of the adjacent sliders 22 and the upper surface of the plate 21 form an embedding groove 24, and the embedding groove 24 is used to insert the inserting roller 5. Moreover, the inserting roller 5 embedded in the embedding groove 24 can move upward and out of the embedding groove 24.

[0071] Reference Figure 2 The roller frame 4 is provided with an avoidance groove 42, and the avoidance groove 42 is used for the stacking plate 2 to pass through. At the same time, the length of the roller 5 is greater than the plate body 21, so that both ends of the roller 5 can extend out of the plate body 21. The lifting surface 41 is used for the guide surface 51 to fit.

[0072] Reference Figure 1 and Figure 5 Two drive devices 3 are provided: one drive device 3 is used to drive the stacking plate 2 to move vertically, and the other drive device 3 is used to drive the roller frame 4 to move vertically. Specifically, the four chains 326 in the other drive device 3 are respectively connected to the four corners of the roller frame 4. Moreover, the two drive devices 3 operate independently of each other.

[0073] Reference Figure 3 The pallet plate 2 further includes a support plate 25. The support plate 25 is located above the plate body 21, and its horizontal end extends out of the plate body 21. The support plate 25 is provided with a through slot 251 that vertically penetrates the support plate 25, and the groove wall of the through slot 251 is used for the side surface of the slider 22 to be in contact with it.

[0074] When the lower surface of the supporting plate 25 is in contact with the upper surface of the plate body 21 and the slider 22 only supports the paper stack, the elastic member 23 makes the upper end of the slider 22 higher than the upper surface of the supporting plate 25 .

[0075] Reference Figure 6 The frame 1 includes a column 11, a support block 12, a positioning block 13 and a reset drive member 14. The column 11 is arranged vertically. The support block 12 is connected to the column 11 in a horizontal sliding direction, and a guide surface 121 is provided at one end of the support block 12 along its own sliding direction. There are two guide surfaces 121, and the two guide surfaces 121 are respectively located at the upper and lower ends of the support block 12. The distance between the two guide surfaces 121 decreases as it moves away from the other end of the support block 12; at the same time, the intersection of the planes where the two guide surfaces 121 are located is horizontal. Both guide surfaces 121 are used for the edges of the plate body 21 to slide and abut. The upper surface of the support block 12 is arranged horizontally and is set as a support surface 122, and the support surface 122 is used for the lower surface of the support plate 25 to fit.

[0076] The positioning block 13 is fixedly connected to the support block 12. A positioning groove 131 is defined at one end of the positioning block 13, along the sliding direction of the support block 12. This groove 131 is designed to receive the edge of the support plate 25. The reset driver 14 forces the support block 12 toward the center of the plate 21. Furthermore, the downwardly facing wall of the positioning groove 131 is inclined; specifically, the height of any point on the downwardly facing wall of the positioning groove 131 increases as it approaches the center of the plate 21.

[0077] Reference Figure 1 , the frame 1 also includes a friction member 15. In addition, the avoidance groove 42 of the roller frame 4 is also used for the friction member 15 to penetrate. Figure 6The surface of the friction member 15 facing the center of the plate body 21 is used for the edge of the support plate 25 to slide against and form a friction pair. That is, when the support plate 25 and the friction member 15 slide against each other, friction exists between the support plate 25 and the friction member 15, and this friction force is greater than the weight of the support plate 25.

[0078] In one embodiment, a rubber sheet may be attached to the surface of the friction member 15 facing the center of the plate 21 .

[0079] Reference Figure 6 and Figure 7 , when the plate 21 moves downward to the lowest position:

[0080] The supporting plate 25 first slides against the friction member 15, causing the supporting plate 25 to move upward relative to the plate body 21 until the groove wall of the through groove 251 contacts the slider 22, causing the slider 22 to move upward relative to the plate body 21. The elastic member 23 is stretched and deformed until the elastic force of the elastic member 23 equals the friction force between the supporting plate 25 and the friction member 15.

[0081] When the plate body 21 continues to move downward until it touches the guide surface 121, the guide surface 121 causes the support block 12 to move horizontally. When the end surface of the support block 12 facing the center of the plate body 21 touches the plate body 21, the distance between the positioning block 13 and the plate body 21 is smaller than the distance between the friction member 15 and the plate body 21, that is, the positioning block 13 avoids the support plate 25.

[0082] When the plate body 21 continues to move downward to be lower than the support block 12, the reset driving member 14 drives the support block 12 and the positioning block 13 close to the center of the plate body 21, and the supporting plate 25 is moved downward through the groove wall of the positioning groove 131, and the supporting plate 25 moves downward to fit the support surface 122. At the same time, the elastic force of the elastic member 23 makes the slider 22 always fit the groove wall of the through groove 251.

[0083] At the same time, when the groove wall of the through groove 251 is in contact with the side surface of the slider 22, the upper surface of the supporting plate 25 is not lower than the upper end of the slider 22. In this embodiment, when the groove wall of the through groove 251 is in contact with the side surface of the slider 22, the upper surface of the supporting plate 25 is flush with the upper end of the slider 22.

[0084] When the plate body 21 moves upward, the edge of the plate body 21 touches the guide surface 121, and the edge of the supporting plate 25 touches the groove wall of the positioning groove 131, so that the support block 12 and the positioning block 13 move horizontally; then, the supporting plate 25 slides and fits against the friction member 15, so that the supporting plate 25 moves downward relative to the plate body 21, and the lower surface of the supporting plate 25 fits against the upper surface of the plate body 21.

[0085] Reference Figure 6In this embodiment, a groove 111 is provided on the surface of the column 11 facing the center of the plate body 21, and one end of the support block 12 is slidably embedded in the groove 111. In addition, the reset driving member 14 adopts a spring, and the reset driving member 14 is arranged in the groove 111 to utilize the elastic force of the reset driving member 14 to drive the support block 12 to extend out of the groove 111.

[0086] Reference Figure 1 The paper feeder further includes a feeder head 6 disposed at the upper end of the frame 1, so as to utilize the feeder head 6 to absorb the single paper on the top of the paper pile and output it.

[0087] The implementation principle of a paper feeder in the embodiment of the present application is as follows:

[0088] 1. Paper is stacked on the stacking plate 2, which rises. The main paper pile rises to complete the paper conveying. At the same time, the roller frame 4 descends.

[0089] 2. When the roller inserting frame 4 is lower than the stacking plate 2, insert the multiple rollers 5 horizontally into the embedded grooves 24 on the upper surface of the stacking plate 2; at this time, the multiple rollers 5 are located directly below the paper pile, and both ends of the rollers 5 extend out of the embedded grooves 24;

[0090] 3. The roller frame 4 rises and lifts the rollers 5. The rollers 5 then simultaneously move upward out of the slots 24 and lift the remaining paper stack. The auxiliary paper stack then rises to complete the paper conveying.

[0091] 4. The empty stacking plate 2 is lowered to its lowest position, and new paper is stacked on the stacking plate 2. At this point, the slider 22 only supports the paper stack, and the elastic member 23 causes the upper end of the slider 22 to extend out of the slide slot 211.

[0092] 5. The stacking plate 2 and the new paper pile rise. When the new paper pile rises to the point where it slightly presses against the inserting roller 5, the inserting roller frame 4 descends, separating the inserting roller frame 4 from the inserting roller 5. At this time, the slider 22 supports both the paper pile and the inserting rod. The weight of the inserting rod causes the elastic member 23 to further deform, reducing the length of the upper end of the slider 22 extending out of the chute 211.

[0093] 6. Finally, the inserting roller 5 is pulled out, so that the remaining paper pile overlaps with the new paper pile on the stacking plate 2. After the inserting roller 5 is pulled out, the gravity of the inserting rod cannot act on the slider 22 and the elastic member 23, and the force on the slider 22 and the elastic member 23 is reduced. The elastic member 23 increases the length of the upper end of the slider 22 extending out of the chute 211, thereby shortening the distance that the remaining paper pile above falls downward, thereby shortening the time required for the top height of the paper pile to rise to the specified height again;

[0094] Repeat the above process to complete the non-stop paper feeding work of the main and auxiliary paper piles.

[0095] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A paper feeder, comprising a stacking plate (2) and an inserting roller (5) for stacking paper, characterized in that: The stacking plate (2) includes a plate body (21), a slider (22) and an elastic member (23). A slide groove (211) is provided on the upper surface of the plate body (21). The depth of the slide groove (211) is not less than the height of the slider (22). The slider (22) slides vertically and is embedded in the slide groove (211). The upper surface of the slider (22) is used to support the paper pile. One end of the elastic member (23) is connected to the plate body (21), and the other end of the elastic member (23) is connected to the slider (22). When the slider (22) only supports the paper pile, the elastic member (23) causes the upper end of the slider (22) to extend out of the slide groove (211); A plurality of sliders (22) are provided at intervals; when the upper ends of the plurality of sliders (22) extend out of the slide groove (211), the surfaces of the adjacent sliders (22) and the upper surface of the plate body (21) are combined to form an embedding groove (24), and the embedding groove (24) is used for embedding the inserting roller (5); Corresponding to each of the sliders (22), a plurality of elastic members (23) are provided at intervals, and the plurality of elastic members (23) are distributed along the length direction of the slider (22).

2. The paper feeder according to claim 1, characterized in that: The lower surface of the inserting roller (5) is provided with a guide surface (51), and an angle is formed between the guide surface (51) and the axis of the inserting roller (5).

3. The paper feeder according to claim 2, characterized in that: It also includes a roller inserting frame (4), wherein the upper surface of the roller inserting frame (4) is provided on a lifting surface (41), and the lifting surface (41) is used for the guide surface (51) to be in contact with; When the guide surface (51) is in contact with the lifting surface (41), the axis of the inserting roller (5) is horizontal.

4. The paper feeder according to claim 1, wherein: The stacking plate (2) further comprises a supporting plate (25) located above the plate body (21), the supporting plate (25) being vertically slidably connected to the plate body (21), the supporting plate (25) being provided with a through groove (251), the through groove (251) vertically penetrating the supporting plate (25), and the groove wall of the through groove (251) being used for the sliding block (22) to slide and fit; When the lower surface of the supporting plate (25) is in contact with the upper surface of the plate body (21), and the slider (22) only supports the paper pile, the elastic member (23) enables the upper end of the slider (22) to be higher than the upper surface of the supporting plate (25).

5. The paper feeder according to claim 4, characterized in that: It also includes a frame (1), the plate body (21) is connected to the frame (1) in a vertical sliding manner, and the supporting plate (25) is slidably fitted to the frame (1) to form a friction pair.

6. The paper feeder according to claim 4, characterized in that: The horizontal cross-sectional area of ​​the slider (22) decreases from top to bottom; When the groove wall of the through groove (251) fits the side surface of the slider (22), the upper surface of the supporting plate (25) is not lower than the upper end of the slider (22).

7. The paper feeder according to claim 4, characterized in that: It also includes a frame (1), the plate body (21) is vertically slidably connected to the frame (1), one end of the support plate (25) extends out of the plate body (21) in the horizontal direction, and the frame (1) is provided with a support surface (122); When the plate body (21) moves to the lowest position and the lower surface of the supporting plate (25) is in contact with the support surface (122), the upper surface of the supporting plate (25) is not lower than the upper end of the slider (22).

8. The paper feeder according to claim 5, characterized in that: The frame (1) comprises a column (11), a support block (12), a positioning block (13) and a reset drive member (14), wherein the column (11) is vertically arranged, the support block (12) is connected to the column (11) in a sliding manner in a horizontal direction, and the upper and lower ends of the support block (12) along one end of its own sliding direction are provided with guide surfaces (121), and the guide surfaces (121) are used for the edge of the plate body (21) to slide and abut; the positioning block (13) is fixedly connected to the support block (12), and the positioning block (13) is provided with a positioning groove (131) along one end of the support block (12) in the sliding direction, and the positioning groove (131) is used for the edge of the supporting plate (25) to be embedded, and the reset drive member (14) makes the support block (12) have a tendency to approach the center of the plate body (21).

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