Bottom paper pre-wrapping mechanism for whole stack of paper boxes

Abstract

The utility model discloses a whole stack paper box backing paper pre-wrapping mechanism which comprises a machine frame, a paper placing platform, a first adsorption mechanism, two edge folding clamping plates and two first lifting mechanisms, the machine frame is provided with a paper supply station, the paper placing platform is provided with a paper placing station, and the two edge folding clamping plates are arranged on the paper placing station. The rack is provided with a position switching mechanism capable of driving the first adsorption mechanism to switch the position between the paper supply station and the paper placing station, the first adsorption mechanism is installed at the power output end of the position switching mechanism, and the adsorption direction of the first adsorption mechanism is arranged downwards; two vertically-through inserting holes are formed in the paper placing platform, the two inserting holes are located in the same straight line and form the paper placing station, the two first lifting mechanisms are both installed at the bottom of the paper placing platform, the power output ends of the first lifting mechanisms are arranged upwards, and the two edge folding clamping plates are installed at the power output ends of the corresponding first lifting mechanisms respectively. The two edge folding mechanisms are located below the two inserting holes and can move up and down in the corresponding inserting holes.

Description

Technical Field

[0001] This utility model relates to a paper box processing equipment, and more particularly to a pre-wrapping bottom paper mechanism for stacked paper boxes. Background Technology

[0002] In the packaging and printing industry, after cardboard boxes are formed by a gluing machine, they typically need to be counted and transported by a box-feeding and counting mechanism. A certain number of cardboard boxes are then stacked vertically to form a stack for subsequent robotic handling, packing, or palletizing processes. However, in actual production, when the cardboard boxes are stacked vertically to form a stack, the robotic arm often faces the technical challenge of some cardboard boxes falling off during handling.

[0003] Currently, most small and medium-sized packaging companies use manual methods for pre-wrapping bottom paper. This involves workers placing a strip of bottom paper on a platform where cardboard boxes are stacked, manually attaching both ends of the strip to the sides of the cardboard box stack, and then using a robotic arm to clamp the ends of the strip and the stack together. However, this method of pre-wrapping bottom paper relies entirely on manual operation, which is not only inefficient but also results in inaccurate placement of the bottom paper, leading to unstable clamping and a risk of the boxes falling off. Utility Model Content

[0004] The problem to be solved by this utility model is to provide a pre-wrapping bottom paper mechanism for stacked paper boxes. This pre-wrapping bottom paper mechanism can automatically complete the folding and pasting of strip bottom paper without human intervention, and can solve the problem of paper boxes falling off when gripped by a robotic arm.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A pre-wrapping bottom paper mechanism for stacked paper boxes includes a frame and a paper feeding platform, the paper feeding platform being mounted on the frame. The mechanism further includes a first adsorption mechanism, two folding clamps, and two first lifting mechanisms. The frame has a paper feeding station, and the paper feeding platform has a paper feeding station. The frame has a position switching mechanism capable of driving the first adsorption mechanism to switch positions between the paper feeding station and the paper feeding station. The first adsorption mechanism is mounted on the power output end of the position switching mechanism, with its adsorption direction facing downwards. The paper feeding platform has two vertically penetrating holes, which are aligned on the same straight line and form the paper feeding station. Both first lifting mechanisms are mounted at the bottom of the paper feeding platform, with their power output ends facing upwards. The two folding clamps are respectively mounted on the power output ends of the corresponding first lifting mechanisms, and the two folding mechanisms are located below the two holes and can move vertically within the corresponding holes.

[0007] Before use, place a stack of strips of bottom paper on the paper feeding station.

[0008] In use, the position switching mechanism drives the first adsorption mechanism to move to the paper feeding station and lowers it, allowing it to adsorb a single strip of bottom paper. Then, the position switching mechanism drives the first adsorption mechanism to rise, transferring the adsorbed strip of bottom paper to the paper feeding station on the paper feeding platform, covering the two insertion holes. Next, an external paper-picking robot places the entire stack of paper boxes onto the middle of the strip of bottom paper. Finally, two first lifting mechanisms synchronously drive the folding edge. The clamping plate rises, allowing the folding clamping plate to pass through the corresponding insertion hole on the paper feeding platform, pushing and bending both ends of the strip bottom paper upwards so that the two ends of the strip bottom paper adhere to both sides of the carton stack; the folding clamping plate remains in the pushing state until the two grippers of another paper picking robot insert downwards into the outer side of the two ends of the bottom paper, then the two first lifting mechanisms synchronously drive the folding clamping plate to descend below the corresponding insertion hole, and the two grippers of the paper picking robot clamp the two ends of the bottom paper together with the carton stack; while the first adsorption mechanism returns to the paper feeding station, ready for the next round of pre-packaging.

[0009] In a preferred embodiment, the paper-laying platform is further provided with at least one first through hole, located between the two insertion holes. A second adsorption mechanism is installed in the first through hole, with the adsorption direction of the second adsorption mechanism facing upwards. When the strip-shaped bottom paper is placed on the paper-laying platform, the second adsorption mechanism adsorbs upwards, firmly fixing the bottom paper on the paper-laying platform and preventing displacement. In a more preferred embodiment, the second adsorption mechanism is an exhaust fan, with the air inlet of the exhaust fan facing upwards.

[0010] In a further preferred embodiment, both insertion holes are strip-shaped guide holes, and the bottom of the paper-laying platform is equipped with a translation drive mechanism capable of driving the two first lifting mechanisms to move closer or further away. This translation drive mechanism drives the two first lifting mechanisms to move synchronously closer or further away along the strip-shaped guide holes, that is, drives the two folding clamps to move synchronously closer or further away along the strip-shaped guide holes. When the two folding clamps rise upwards to complete the folding of both ends of the strip-shaped bottom paper, the translation drive mechanism then drives the two folding clamps to move synchronously closer along the strip-shaped guide holes, further clamping the two ends of the strip-shaped bottom paper to the carton stack. This prevents the folded edges of the bottom paper from springing back, ensuring the stability of the pre-packaged shape.

[0011] In a further preferred embodiment, the translation drive mechanism includes a first servo motor, a gear, two rack guide slots, two racks, two first linear guides, two pairs of first sliders, two first translation seats, and two folding supports. The first servo motor, the two first linear guides, and the two rack guide slots are all installed at the bottom of the paper feeding platform. The two first linear guides are parallel to the strip guide holes, and the two strip guide holes are located between the two first linear guides. Each pair of first sliders is installed on a corresponding first linear guide and can move on the corresponding first linear guide. The two ends of the first translation seats are respectively installed on the corresponding two first sliders, and the folding supports are installed on the corresponding first sliders. On a translational base, the first lifting mechanism is mounted on a corresponding folding edge support. The first translational base has a first guide hole corresponding to the strip-shaped guide hole, and the folding edge clamp is located in the corresponding first guide hole. The slots of two rack guide grooves are arranged opposite each other, and the two racks are respectively located in the corresponding rack guide grooves and can move in the corresponding rack guide grooves. Both racks are parallel to the strip-shaped guide holes, and the two strip-shaped guide holes are located between the two racks. The left end of one rack is connected to the left side of the first translational base, and the right end of the other rack is connected to the right side of the first translational base. A gear is mounted on the power output shaft of the first servo motor, and the gear is located between the two racks and meshes with the two racks. Driven by the first servo motor, the gear rotates, and the two racks move synchronously in opposite directions along the rack guide grooves, causing the two first lifting mechanisms to move closer or further away along the strip-shaped guide holes.

[0012] In a further preferred embodiment, the first lifting mechanism includes a folding cylinder and a folding block. The cylinder body of the folding cylinder is mounted on the folding support, the piston rod of the folding cylinder is arranged facing upward, the folding block is mounted on the end of the piston rod of the folding cylinder, and the folding clamp is mounted on the folding block.

[0013] In a preferred embodiment, the position switching mechanism includes a lateral translation mechanism and a second lifting mechanism. The lateral translation mechanism is mounted on the frame, and the second lifting mechanism is mounted on the power output end of the lateral translation mechanism. The first suction mechanism is mounted on the power output end of the second lifting mechanism. The aforementioned lateral translation mechanism is used to drive the second lifting mechanism and the first suction mechanism to switch positions between the paper feeding station and the paper discharging station. The lateral translation mechanism drives the second lifting mechanism and its corresponding first suction mechanism to move horizontally, and then the corresponding second lifting mechanism drives the first suction mechanism to move up and down.

[0014] In a further preferred embodiment, the lateral translation mechanism includes a second linear guide rail, a second slider, a second translation seat, a second servo motor, a driving wheel, a driven wheel, and a synchronous belt. The second linear guide rail is mounted on the frame and located between the paper feeding station and the paper discharging station. The second slider is mounted on the second linear guide rail and can move along it. The second translation seat is mounted on the second slider, and the second lifting mechanism is mounted on the second translation seat. The second servo motor is mounted on the frame. Both the driving wheel and the driven wheel are rotatably mounted on the frame. The synchronous belt is tensioned outside the driving wheel and the driven wheel. The second slider is connected to the synchronous belt, and the driving wheel is connected to the power output shaft of the second servo motor. The second servo motor drives the driving wheel to rotate, which in turn drives the second slider, the second translation seat, the second lifting mechanism, and the first suction mechanism to move horizontally along the second linear guide rail via the synchronous belt.

[0015] In a further preferred embodiment, the second lifting mechanism includes a lifting cylinder and a first lifting seat. The lifting cylinder is mounted on the second translation seat, with its piston rod pointing downwards. The first lifting seat is mounted on the end of the piston rod of the lifting cylinder, and the first adsorption mechanism is mounted on the first lifting seat. The lifting cylinder drives the first lifting seat to move up and down, thereby driving the first adsorption mechanism to move up and down.

[0016] In a further preferred embodiment, the first adsorption mechanism includes a nozzle mounting base and two vacuum nozzles. The nozzle mounting base is mounted on the lifting base, and the two vacuum nozzles are respectively mounted on both ends of the nozzle mounting base, with the two vacuum nozzles facing downwards.

[0017] In the preferred embodiment, the paper feeding station is equipped with a bottom paper tray and four paper limiting posts. The bottom paper tray has four outward-facing strip-shaped notches. The two strip-shaped notches on the left are on the same straight line, and the two strip-shaped notches on the right are also on the same straight line. The frame is equipped with two third linear guides arranged parallel to each other in the left and right directions. The third linear guide on the left corresponds to the two strip-shaped notches on the left and is located below them. The third linear guide on the right corresponds to the two strip-shaped notches on the right and is located below them. Each third linear guide is equipped with two third sliders. The lower ends of the four paper limiting posts are respectively installed on the corresponding third sliders. The lower parts of the two paper limiting posts on the two third linear guides and on the same side are connected by a connecting plate. The four paper limiting posts are located in the corresponding strip-shaped notches, and the four paper limiting posts form a paper feeding channel that can hold strip-shaped bottom paper. A limiting mechanism that can restrict the position of the paper limiting posts is provided in either the two strip-shaped notches on the left or the two strip-shaped notches on the right. The paper supply channel formed by the paper-limiting posts allows for precise positioning of the strip-shaped bottom paper, preventing it from shifting during feeding. The aforementioned third linear guide rail allows the paper-limiting posts to move within the corresponding strip-shaped notches, adjusting the width of the paper supply channel to accommodate bottom paper of different widths. These strip-shaped notches provide clearance for the bottom paper tray during lifting and lowering, preventing interference between the tray and the paper-limiting posts. The aforementioned limiting mechanism precisely adjusts the position of the paper-limiting posts, locking the width of the paper supply channel to accommodate different sizes of bottom paper.

[0018] In a further preferred embodiment, the limiting mechanism includes a limiting block, an adjusting bolt, an adjusting nut, and a strip-shaped limiting hole on the bottom paper tray. The extending direction of the strip-shaped limiting hole is parallel to the extending direction of the strip-shaped notch. One end of the limiting block has a second through hole. The rod of the adjusting bolt passes through the second through hole, the strip-shaped limiting hole, and the adjusting nut in sequence. The head of the adjusting bolt and the adjusting nut together clamp the limiting block and the bottom paper tray. The other end of the limiting block spans across the strip-shaped notch. The clamping structure of the adjusting bolt and the adjusting nut locks the position of the limiting block, ensuring that the paper-limiting column does not wobble during paper feeding and improving positioning accuracy. The limiting block spanning the strip-shaped notch prevents excessive movement of the paper-limiting column and avoids failure of the paper feeding channel.

[0019] In a further preferred embodiment, the bottom paper tray is movably mounted on the frame, and the frame is equipped with a third lifting mechanism. The bottom paper tray is connected to the power output end of the third lifting mechanism. The bottom paper tray can move up and down along the paper limiting column, so that the top strip of bottom paper is always at the paper picking height of the first adsorption mechanism, ensuring that only one sheet of bottom paper is adsorbed each time, avoiding double-sheeting or adsorption failure.

[0020] In a further preferred embodiment, the third lifting mechanism includes a fourth linear guide rail, a fourth slider, a second lifting seat, a lead screw, a nut seat, and a lead screw drive unit capable of driving the lead screw to rotate. The fourth linear guide rail is mounted on the frame and is arranged vertically. The fourth slider is mounted on the fourth linear guide rail and can move along it. The second lifting seat is mounted on the fourth slider, and the bottom paper tray is mounted on the second lifting seat. The lead screw drive unit is mounted on the frame, and the lead screw is rotatably mounted on the frame. The lead screw is parallel to the fourth linear guide rail and engages with the nut seat, which is connected to the second lifting seat. By driving the lead screw to rotate through the lead screw drive unit, the lead screw drives the nut seat to move along the fourth linear guide rail, and the nut seat drives the second lifting seat to move, thereby enabling the bottom paper tray to move up and down along each paper limiting post.

[0021] In one specific embodiment, the lead screw drive unit is a motor, and one end of the lead screw is connected to the power output shaft of the motor. According to this configuration, the motor drives the lead screw to rotate. In another specific embodiment, the lead screw drive unit is a handwheel, which is installed at one end of the lead screw. The user manually rotates the handwheel to drive the lead screw to rotate.

[0022] Compared with the prior art, this utility model has the following advantages:

[0023] This invention uses a position switching mechanism to drive the first adsorption mechanism to automatically complete the paper feeding station's paper picking and the paper dispensing station's paper dispensing. The first lifting mechanism drives the folding clamp to precisely push both ends of the strip bottom paper through the insertion hole, automatically completing the strip bottom paper folding and bonding. The entire process requires no manual intervention, which can solve the problem of paper boxes falling off when gripped by a robotic arm and improve production efficiency. Attached Figure Description

[0024] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model;

[0025] Figure 2 yes Figure 1 A top-down view of the paper feeding platform;

[0026] Figure 3 This is a schematic diagram of the translation drive mechanism according to a specific embodiment of this utility model;

[0027] Figure 4 This is a schematic diagram of the position switching mechanism in a specific embodiment of this utility model. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1-4As shown, the pre-wrapping bottom paper mechanism for stacked paper boxes in this embodiment includes a frame 1, a paper feeding platform 2, a first adsorption mechanism 3, two folding edge clamps 4, and two first lifting mechanisms 5. The paper feeding platform 2 is mounted on the frame 1, which has a paper feeding station 11 and a paper feeding station 21. The frame 1 has a position switching mechanism 6 that can drive the first adsorption mechanism 3 to switch positions between the paper feeding station 11 and the paper feeding station 21. The first adsorption mechanism 3 is mounted on the power output end of the position switching mechanism 6, and the adsorption direction of the first adsorption mechanism 3 is downward. The paper feeding platform 2 has two vertically penetrating holes 22, which are on the same straight line and form the paper feeding station 21. The two first lifting mechanisms 5 are mounted on the bottom of the paper feeding platform 2, with the power output ends of the first lifting mechanisms 5 facing upward. The two folding edge clamps 4 are respectively mounted on the power output ends of the corresponding first lifting mechanisms 5, and the two folding edge clamps are located below the two holes 22 and can move up and down in the corresponding holes 22.

[0030] Before use, place a stack of strip paper on the paper supply station 11.

[0031] In use, the position switching mechanism 6 drives the first adsorption mechanism 3 to move to the paper feeding station 11 and lowers it, allowing the first adsorption mechanism 3 to adsorb a single strip of bottom paper. Then, the position switching mechanism 6 drives the first adsorption mechanism 3 to rise and transfer the adsorbed strip of bottom paper to the paper feeding station 21 of the paper feeding platform 2, so that the strip of bottom paper covers the two insertion holes 22. Then, the external paper picking robot places the entire stack of paper boxes on the middle part of the strip of bottom paper. Next, the two first lifting mechanisms 5 synchronously drive the folding edge. The clamping plate 4 rises, allowing the folding clamping plate 4 to pass through the corresponding insertion hole 22 of the paper feeding platform 2, pushing and bending both ends of the strip bottom paper upwards, so that the two ends of the strip bottom paper adhere to both sides of the paper box stack; the folding clamping plate 4 remains in the pushing state until the two grippers of another paper picking robot insert downwards into the outer side of the two ends of the bottom paper, then the two first lifting mechanisms 5 synchronously drive the folding clamping plate 4 to descend below the corresponding insertion hole 22, and the two grippers of the paper picking robot clamp the two ends of the bottom paper together with the paper box stack; while the first adsorption mechanism 3 returns to the paper feeding station 11, ready for the next round of pre-packaging.

[0032] The paper feeding platform 2 is also provided with at least one first through hole 23, which is located between the two insertion holes 22. A second adsorption mechanism 24 is installed in the first through hole 23, and the adsorption direction of the second adsorption mechanism 24 is upward. When the strip of bottom paper is placed on the paper feeding platform 2, the second adsorption mechanism 24 adsorbs upward, firmly fixing the bottom paper on the paper feeding platform 2 and preventing displacement. In a more preferred embodiment, the second adsorption mechanism 24 is an exhaust fan, and the air inlet of the exhaust fan is upward.

[0033] Both insertion holes 22 are strip-shaped guide holes. The bottom of the paper-laying platform 2 is equipped with a translation drive mechanism 7 that can drive the two first lifting mechanisms 5 to move closer or further away. The translation drive mechanism 7 is used to drive the two first lifting mechanisms 5 to move closer or further away synchronously along the strip-shaped guide holes, that is, to drive the two folding clamps 4 to move closer or further away synchronously along the strip-shaped guide holes. When the two folding clamps 4 rise upward to complete the folding of both ends of the strip bottom paper, the translation drive mechanism 7 drives the two folding clamps 4 to move closer synchronously along the strip-shaped guide holes, further clamping the two ends of the strip bottom paper to the carton stack, which can prevent the folded edges of the bottom paper from springing back and ensure the stability of the pre-packaged shape.

[0034] The translation drive mechanism 7 includes a first servo motor 71, a gear 72, two rack guide slots 73, two racks 74, two first linear guides 75, two pairs of first sliders 76, two first translation seats 77, and two folding supports 78. The first servo motor 71, the two first linear guides 75, and the two rack guide slots 73 are all installed at the bottom of the paper feeding platform 2. The two first linear guides 75 are parallel to the strip-shaped guide holes, and the two strip-shaped guide holes are located between the two first linear guides 75. Each pair of first sliders 76 is respectively installed on the corresponding first linear guide 75 and can move on the corresponding first linear guide 75. The two ends of the first translation seats 77 are respectively installed on the corresponding two first sliders 76, and the folding supports 78 are installed on the corresponding first translation seats 77. The first lifting mechanism 5 is mounted on the corresponding folding support 78. The first translation seat 77 is provided with a first guide hole 771 corresponding to the strip guide hole, and the folding clamp 4 is located in the corresponding first guide hole 771. The slots of the two rack guide grooves 73 are arranged opposite each other, and the two racks 74 are respectively located in the corresponding rack guide grooves 73 and can move in the corresponding rack guide grooves 73. Both racks 74 are parallel to the strip guide hole, and both strip guide holes are located between the two racks 74. The left end of one rack 74 is connected to the left first translation seat 77, and the right end of the other rack 74 is connected to the right first translation seat 77. The gear 72 is mounted on the power output shaft of the first servo motor 71, and the gear 72 is located between the two racks 74 and meshes with the two racks 74. The first servo motor 71 drives the gear 72 to rotate, and the two racks 74 move synchronously in opposite directions along the rack guide groove 73, driving the two first lifting mechanisms 5 to move closer or further away along the strip guide hole.

[0035] The first lifting mechanism 5 includes a folding cylinder 51 and a folding block 52. The cylinder body of the folding cylinder 51 is mounted on the folding support 78, the piston rod of the folding cylinder 51 is set upward, the folding block 52 is mounted on the end of the piston rod of the folding cylinder 51, and the folding clamp 4 is mounted on the folding block 52.

[0036] The position switching mechanism 6 includes a lateral translation mechanism 61 and a second lifting mechanism 62. The lateral translation mechanism 61 is mounted on the frame 1, and the second lifting mechanism 62 is mounted on the power output end of the lateral translation mechanism 61. The first suction mechanism 3 is mounted on the power output end of the second lifting mechanism 62. The lateral translation mechanism 61 drives the second lifting mechanism 62 and the first suction mechanism 3 to switch positions between the paper feeding station 11 and the paper discharging station 21. The lateral translation mechanism 61 drives the second lifting mechanism 62 and the first suction mechanism 3 on it to move horizontally, and then the corresponding second lifting mechanism 62 drives the first suction mechanism 3 to move up and down.

[0037] The transverse translation mechanism 61 includes a second linear guide rail 611, a second slider 612, a second translation seat 613, a second servo motor 614, a drive wheel 615, a driven wheel 616, and a synchronous belt 617. The second linear guide rail 611 is mounted on the frame 1 and is located between the paper feeding station 11 and the paper discharging station 21. The second slider 612 is mounted on the second linear guide rail 611 and can move on the second linear guide rail 611. The second translation seat 613 is mounted on the second slider 612. The second lifting mechanism 62 is mounted on the second translation seat 613. The second servo motor 614 is mounted on the frame 1. The drive wheel 615 and the driven wheel 616 are rotatably mounted on the frame 1. The synchronous belt 617 is tensioned outside the drive wheel 615 and the driven wheel 616. The second slider 612 is connected to the synchronous belt 617. The drive wheel 615 is connected to the power output shaft of the second servo motor 614. The second servo motor 614 drives the drive wheel 615 to rotate, and the synchronous belt 617 drives the second slider 612, the second translation seat 613, the second lifting mechanism 62, and the first adsorption mechanism 3 to move horizontally along the second linear guide rail 611.

[0038] The second lifting mechanism 62 includes a lifting cylinder 621 and a first lifting seat 622. The lifting cylinder 621 is mounted on the second translation seat 613, with the piston rod of the lifting cylinder 621 facing downwards. The first lifting seat 622 is mounted on the end of the piston rod of the lifting cylinder 621, and the first adsorption mechanism 3 is mounted on the first lifting seat 622. The lifting cylinder 621 drives the first lifting seat 622 to move up and down, thereby driving the first adsorption mechanism 3 to move up and down.

[0039] The first adsorption mechanism 3 includes a nozzle mounting base 31 and two vacuum nozzles 32. The nozzle mounting base 31 is mounted on the lifting base, and the two vacuum nozzles 32 are respectively mounted on both ends of the nozzle mounting base 31, with the two vacuum nozzles 32 facing downwards.

[0040] The paper feeding station 11 is equipped with a bottom paper tray 8 and four paper limiting posts 9. The bottom paper tray 8 has four outward-facing strip-shaped notches 81. The two strip-shaped notches 81 on the left are on the same straight line, and the two strip-shaped notches 81 on the right are on the same straight line. The frame 1 is equipped with two third linear guides 12 arranged parallel to each other in the left and right directions. The third linear guide 12 on the left corresponds to the two strip-shaped notches 81 on the left and is located below the two strip-shaped notches 81 on the left. The third linear guide 12 on the right corresponds to the two strip-shaped notches 81 on the right and is located below the two strip-shaped notches 81 on the right. Below the notch 81, each third linear guide rail 12 is equipped with two third sliders 14. The lower ends of the four paper-limiting posts 9 are respectively installed on the corresponding third sliders 14. The lower parts of the two paper-limiting posts 9 on the two third linear guide rails 12 and on the same side are connected by a connecting plate 10. The four paper-limiting posts 9 are respectively located in the corresponding strip notches 81, and the four paper-limiting posts 9 form a paper feeding channel 91 that can hold strip-shaped bottom paper. The two strip notches 81 on the left or the two strip notches 81 on the right are equipped with limiting mechanisms 82 that can restrict the position of the paper-limiting posts 9. The paper feeding channel 91 formed by the paper-limiting posts 9 can accurately position the strip-shaped bottom paper and prevent the bottom paper from shifting during paper feeding. The aforementioned third linear guide rail 12 allows the paper-limiting posts 9 to move in the corresponding strip notches 81, adjusting the width of the paper feeding channel 91 to adapt to bottom paper of different widths. The aforementioned strip notches 81 provide lifting and lowering clearance space for the bottom paper tray 8, avoiding interference between the bottom paper tray 8 and the paper-limiting posts 9 when lifting or lowering. The aforementioned limiting mechanism 82 can precisely adjust the position of the paper limiting post 9, lock the width of the paper supply channel 91, and adapt to different specifications of bottom paper.

[0041] The limiting mechanism 82 includes a limiting block 821, an adjusting bolt 822, an adjusting nut, and a strip-shaped limiting hole 823 provided on the bottom paper tray 8. The extending direction of the strip-shaped limiting hole 823 is parallel to the extending direction of the strip-shaped notch 81. One end of the limiting block 821 is provided with a second through hole 8211. The rod of the adjusting bolt 822 passes through the second through hole 8211, the strip-shaped limiting hole 823, and the adjusting nut in sequence. The head of the adjusting bolt 822 and the adjusting nut together clamp the limiting block 821 and the bottom paper tray 8. The other end of the limiting block 821 spans across the strip-shaped notch 81. Through the clamping structure of the adjusting bolt 822 and the adjusting nut, the position of the limiting block 821 is locked, ensuring that the paper limiting post 9 does not shake during paper feeding and improving positioning accuracy. The limiting block 821 spans across the strip-shaped notch 81 to prevent excessive movement of the paper limiting post 9 and avoid failure of the paper feeding channel 91.

[0042] The bottom paper tray 8 is movably mounted on the frame 1, and the frame 1 is provided with a third lifting mechanism 13. The bottom paper tray 8 is connected to the power output end of the third lifting mechanism 13. The bottom paper tray 8 can be raised and lowered along the paper limiting column 9, so that the top strip of bottom paper is always at the paper picking height of the first adsorption mechanism 3, ensuring that only one sheet of bottom paper is adsorbed each time, avoiding double-sheeting or adsorption failure.

[0043] The third lifting mechanism 13 includes a fourth linear guide rail 131, a fourth slider 132, a second lifting seat 133, a lead screw 134, a nut seat 135, and a lead screw drive unit 136 capable of driving the lead screw 134 to rotate. The fourth linear guide rail 131 is mounted on the frame 1 and is arranged vertically. The fourth slider 132 is mounted on the fourth linear guide rail 131 and can move on the fourth linear guide rail 131. The second lifting seat 133 is mounted on the fourth slider 132, and the bottom paper tray 8 is mounted on the second lifting seat 133. The lead screw drive unit 136 is mounted on the frame 1. The lead screw 134 is rotatably mounted on the frame 1. The lead screw 134 is parallel to the fourth linear guide rail 131, and the lead screw 134 meshes with the nut seat 135. The nut seat 135 is connected to the second lifting seat 133. The lead screw 134 is driven to rotate by the lead screw drive unit 136. The lead screw 134 drives the nut seat 135 to move along the fourth linear guide rail 131. The nut seat 135 drives the second lifting seat 133 to move, thereby enabling the bottom paper tray 8 to move up and down along each paper limiting column 9.

[0044] The lead screw drive unit 136 is a motor, and one end of the lead screw 134 is connected to the power output shaft of the motor. According to the above configuration, the motor drives the lead screw 134 to rotate.

[0045] Furthermore, it should be noted that the names of the various parts of the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles described in this utility model patent concept are included within the protection scope of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in these claims, they should all fall within the protection scope of this utility model.

Claims

1. A mechanism for pre-bottoming of a stack of sheets, comprising a frame and a sheet depositing platform mounted on the frame, characterized in that: The rack is provided with a paper supply station, the paper placing platform is provided with a paper placing station, the rack is provided with a position switching mechanism capable of driving the first adsorption mechanism to switch positions between the paper supply station and the paper placing station, the first adsorption mechanism is installed on the power output end of the position switching mechanism, and the adsorption direction of the first adsorption mechanism is arranged downward; the paper placing platform is provided with two through insertion holes, the two insertion holes are on the same straight line and constitute the paper placing station, the two first lifting mechanisms are both installed on the bottom of the paper placing platform, the power output end of the first lifting mechanism is arranged upward, the two flange clamping plates are respectively installed on the power output end of the corresponding first lifting mechanism, and the two flange mechanisms are below the two insertion holes and can move up and down in the corresponding insertion holes.

2. The mechanism for pre-banding the bundle of paper sheets according to claim 1, wherein: The paper placing platform is further provided with at least one first through hole between the two insertion holes, the first through hole is provided with a second adsorption mechanism, and the adsorption direction of the second adsorption mechanism is arranged upward.

3. The mechanism for pre-banding the bundle of paper sheets according to claim 2, wherein: The two insertion holes are both strip-shaped guide holes, and the bottom of the paper placing platform is provided with a translation driving mechanism capable of driving the two first lifting mechanisms to approach or move away.

4. The mechanism for pre-banding the bundle of sheets according to claim 3, wherein: The translation driving mechanism comprises a first servo motor, a gear, two rack guide grooves, two racks, two first linear guides, two pairs of first sliders, two first translation seats and two flange supports, the first servo motor, the two first linear guides and the two rack guide grooves are all installed on the bottom of the paper placing platform, the two first linear guides are parallel to the strip-shaped guide holes, the two strip-shaped guide holes are between the two first linear guides, each pair of first sliders is installed on and can move on the corresponding first linear guide, the two ends of the first translation seat are respectively installed on the corresponding two first sliders, the flange support is installed on the corresponding first translation seat, the first lifting mechanism is installed on the corresponding flange support, the first translation seat is provided with a first guide hole corresponding to the strip-shaped guide hole, and the flange clamping plate is in the corresponding first guide hole; the two rack guide grooves are oppositely arranged, the two racks are respectively in and can move in the corresponding rack guide grooves, the two racks are parallel to the strip-shaped guide holes, and the two strip-shaped guide holes are between the two racks; the left end of one rack is connected with the left first translation seat, and the right end of the other rack is connected with the right first translation seat; the gear is installed on the power output shaft of the first servo motor, and the gear is between the two racks and is in mesh with the two racks.

5. The mechanism for pre-bating the sheets of a finished paper case according to claim 4, wherein: The first lifting mechanism comprises a flange cylinder and a flange block, the cylinder body of the flange cylinder is installed on the flange support, the piston rod of the flange cylinder is arranged upward, the flange block is installed on the end of the piston rod of the flange cylinder, and the flange clamping plate is installed on the flange block.

6. The mechanism for pre-banding a stack of papers according to claim 1, wherein: The position switching mechanism comprises a transverse translation mechanism and a second lifting mechanism, the transverse translation mechanism is installed on the rack, the second lifting mechanism is installed on the power output end of the transverse translation mechanism, and the first adsorption mechanism is installed on the power output end of the second lifting mechanism. 7.The paper pre-bundling mechanism of the paper stacker according to claim 6, wherein: the transverse translation mechanism comprises a second linear guide rail, a second sliding block, a second translation seat, a second servo motor, a driving wheel, a driven wheel and a synchronous belt, the second linear guide rail is installed on the frame and between the paper feeding station and the paper releasing station, the second sliding block is installed on the second linear guide rail and can move on the second linear guide rail, the second translation seat is installed on the second sliding block, and the second lifting mechanism is installed on the second translation seat; the second servo motor is installed on the frame, the driving wheel and the driven wheel are rotatably installed on the frame, the synchronous belt is tensioned outside the driving wheel and the driven wheel, the second sliding block is connected with the synchronous belt, and the driving wheel is in transmission connection with the power output shaft of the second servo motor; the second lifting mechanism comprises a lifting cylinder and a first lifting seat, the lifting cylinder is installed on the second translation seat, the piston rod of the lifting cylinder is downwardly arranged, and the first lifting seat is installed on the end of the piston rod of the lifting cylinder; and the first suction mechanism is installed on the first lifting seat; the first suction mechanism comprises a suction nozzle mounting seat and two vacuum suction nozzles, the suction nozzle mounting seat is installed on the lifting seat, and the two vacuum suction nozzles are respectively installed on the two ends of the suction nozzle mounting seat and are downwardly arranged. the paper feeding station is provided with a bottom paper supporting plate and four paper limiting columns, the bottom paper supporting plate is provided with four outwardly open strip-shaped notches, the two strip-shaped notches on the left side are on the same straight line, the two strip-shaped notches on the right side are on the same straight line, the frame is provided with two third linear guide rails arranged in parallel along the left-right direction, the third linear guide rail on the left side corresponds to the two strip-shaped notches on the left side and is below the two strip-shaped notches on the left side, the third linear guide rail on the right side corresponds to the two strip-shaped notches on the right side and is below the two strip-shaped notches on the right side, each third linear guide rail is provided with two third sliding blocks, the lower ends of the four paper limiting columns are respectively installed on the corresponding third sliding blocks, the lower parts of the two paper limiting columns on the same side of the two third linear guide rails are connected by a connecting plate, the four paper limiting columns are respectively in the corresponding strip-shaped notches, and the four paper limiting columns enclose a paper feeding channel capable of placing strip-shaped bottom paper; the two strip-shaped notches on the left side or the two strip-shaped notches on the right side are each provided with a limiting mechanism capable of limiting the position of the paper limiting column.

8. The mechanism for pre-banding the bundle of sheets according to claim 1, wherein: the limiting mechanism comprises a limiting block, an adjusting bolt, an adjusting nut and a strip-shaped limiting hole provided on the bottom paper supporting plate, the extension direction of the strip-shaped limiting hole is parallel to the extension direction of the strip-shaped notch, one end of the limiting block is provided with a second through hole, the rod of the adjusting bolt passes through the second through hole, the strip-shaped limiting hole and the adjusting nut in sequence, the head of the adjusting bolt and the adjusting nut clamp the limiting block and the bottom paper supporting plate together, and the other end of the limiting block spans the strip-shaped notch.

9. The mechanism for pre-banding a stack of sheets as set forth in claim 8, wherein: 10.The paper pre-bundling mechanism of the paper stacker according to claim 8, wherein: the bottom paper supporting plate is movably installed on the frame, the frame is provided with a third lifting mechanism, and the bottom paper supporting plate is connected with the power output end of the third lifting mechanism. ​ ​ The third lifting mechanism comprises a fourth linear guide rail, a fourth sliding block, a second lifting seat, a screw rod, a nut seat and a screw rod driving unit capable of driving the screw rod to rotate, the fourth linear guide rail is installed on the rack and arranged in the vertical direction, the fourth sliding block is installed on the fourth linear guide rail and can move on the fourth linear guide rail, the second lifting seat is installed on the fourth sliding block, and the bottom paper supporting plate is installed on the second lifting seat; the screw rod driving unit is installed on the rack, the screw rod is rotatably installed on the rack, the screw rod is parallel to the fourth linear guide rail, the screw rod is engaged with the nut seat, and the nut seat is connected with the second lifting seat.

Images