An automatic stamping device for tender documents

Abstract

This invention relates to the field of document stamping technology, and more particularly to an automatic stamping device for tender documents. The device includes a mounting box, a mounting plate, a housing, a mounting frame, a first electric guide rail, and a cylinder. The mounting plate is connected inside the mounting box, the housing is connected to the top of the mounting box, and the mounting frame is connected to the top of the housing. The first electric guide rail is mounted inside the mounting frame, and a cylinder is mounted on the slider of the first electric guide rail. This invention uses the extension rod of the cylinder to move the stamp downwards, bringing the stamping surface of the stamp into contact with the tender document, automatically stamping the tender document and improving work efficiency. The rotation of the electric roller can arch the individual tender documents in a bound tender document upwards. A lever can be used to turn the pages of the arched individual tender documents in the bound tender document, and then stamp the bound tender document. This provides greater flexibility and can adapt to various types of tender documents.

Description

Technical Field

[0001] This invention relates to the field of document stamping technology, and more particularly to an automatic stamping device for tender documents. Background Technology

[0002] In fields such as business bidding and legal document processing, stamping the tender documents is an important step. Stamping is an important sign that the documents have been formally authorized, giving them legal effect and making them legally binding.

[0003] Traditional stamping methods are mostly manual operations, which are slow, inefficient, and unsuitable for large-scale stamping operations. Although there are some automatic stamping devices on the market for single-page documents, most of these devices are limited by their own structure and cannot be adjusted according to the type of tender document. For bound tender documents, the degree of automation is not high, making it difficult to achieve efficient and accurate stamping operations, and they lack flexibility and adaptability. Summary of the Invention

[0004] To overcome the limitations of automatic stamping devices due to their structural constraints, such as inability to adjust to different types of tender documents, low automation for bound tender documents, difficulty in achieving efficient and accurate stamping operations, and lack of flexibility and adaptability, this invention provides an automatic stamping device for tender documents.

[0005] An automatic stamping device for tender documents includes a mounting box, a mounting plate, a housing, a mounting frame, a first electric guide rail, a cylinder, a lifting frame, a second electric guide rail, a moving plate, a third electric guide rail, a moving block, a slide rod, an insertion rod, a moving frame, a stamp, gears, a spring, a cylinder, ink pad, a rack, a feeding mechanism, and a page-turning mechanism. The mounting box contains the mounting plate, the top of the mounting box is connected to the housing, and the top of the housing is connected to the mounting frame. The first electric guide rail is mounted inside the mounting frame. A cylinder is mounted on the slider of the first electric guide rail, and the lifting frame is connected to the telescopic rod of the cylinder. The second electric guide rail is mounted at the top of the lifting frame, and the moving plate is connected to the slider of the second electric guide rail. The bottom of the moving plate is equipped with... There is a third electric guide rail, and a moving block is connected to the slider of the third electric guide rail. A sliding rod is slidably connected to the moving block. The upper and lower parts of the sliding rod have insertion holes. An insertion rod is slidably connected to the moving block. The insertion rod can be inserted into the insertion hole to fix the sliding rod. A moving frame is connected to the sliding frame. A stamp is rotatably connected to the moving frame. A gear is connected to the stamp. A spring is connected to the moving frame. A cylinder is connected to the spring. The moving frame is located inside the cylinder and the moving frame and the cylinder are slidably connected. Ink paste is connected to the cylinder by threads. The stamping surface of the stamp contacts the bottom of the ink paste. A rack is connected to the cylinder. A feeding mechanism is used to transport the tender documents to the area directly below the stamp. A page-turning mechanism is used to turn the pages of the bound tender documents.

[0006] Optionally, the feeding mechanism includes a conveyor, a first rotating shaft, a servo motor, a feeding wheel, a first rotating plate, a second rotating shaft, a first hexagonal sleeve, a first conveyor wheel, a second hexagonal sleeve, a second conveyor wheel, a conveyor belt, an adjusting assembly, and a limiting assembly. A conveyor is installed inside the mounting box, passing through the mounting plate. The conveyor places the bid on the mounting plate, bringing the bid into contact with the conveyor. The conveyor transports the bid to the right, delivering it directly below the seal. A first rotating shaft is rotatably connected inside the mounting box, and a servo motor is mounted on the mounting box. The output shaft of the servo motor is connected to the first rotating shaft. A feeding wheel is connected to a rotating shaft. A first rotating plate is rotatably connected to the front and rear of the first rotating shaft. A second rotating shaft is rotatably connected to both first rotating plates. A first hexagonal sleeve is connected to the front and rear of the first rotating shaft. A first conveyor wheel is slidably connected to the first hexagonal sleeve. A second hexagonal sleeve is connected to the front and rear of the second rotating shaft. A second conveyor wheel is slidably connected to the second hexagonal sleeve. Conveyor belts are wound around the second and first conveyor wheels. An adjusting component is used to adjust the distance between the two conveyor belts. A limiting component is used to limit the label on the mounting plate.

[0007] Optionally, the adjusting assembly includes a first connecting plate, a first bidirectional lead screw, and a second connecting plate. The tops of the two first rotating plates are connected to the first connecting plate. The first bidirectional lead screw is rotatably connected to the first connecting plate. The second conveying wheel and the first conveying wheel are rotatably connected to the second connecting plate. Both second connecting plates are threadedly connected to the first bidirectional lead screw, and the first bidirectional lead screw slides through the mounting box.

[0008] Optionally, the limiting assembly includes a screw and an arc plate. Two screws are rotatably connected inside the mounting box, and the two screws are connected by a threaded arc plate for limiting the markings on the mounting plate.

[0009] Optionally, the page-turning mechanism includes a second rotating plate, an electric roller, a baffle, a stepper motor, a lever, and a door panel. The second rotating plate is rotatably connected to the first rotating shaft. The second rotating plate slides through the mounting plate. An electric roller is installed at the lower part of the second rotating plate and is located inside the mounting box. A baffle is hinged to the top of the mounting plate, and a torsion spring connects the baffle and the mounting plate. Stepper motors are installed on both the front and rear sides of the top of the mounting plate, and levers are connected to the output shafts of the stepper motors. A door panel is hinged to the front of the mounting box, and through openings for the levers to pass through are provided at the bottom of the door panel and at the rear of the mounting box.

[0010] Optionally, it also includes a second bidirectional lead screw and a limiting plate. The second bidirectional lead screw is rotatably connected inside the mounting box, and the limiting plates are slidably connected to the front and rear sides of the top of the mounting plate. Both limiting plates are threadedly connected to the second bidirectional lead screw.

[0011] Optionally, it also includes a receiving plate and a retaining ball. The mounting plate has an opening on the right side, and circular grooves are opened on both the front and rear sides of the opening. The receiving plate is used to receive the stamped tender documents. Retaining balls are connected to both the front and rear sides of the receiving plate. The retaining balls are located in the circular grooves, and the receiving plate is held in place in the opening by the retaining balls.

[0012] Optionally, it also includes a handle, which is attached to a first rotating plate on the rear side and slides through the mounting box.

[0013] The beneficial effects of this invention are as follows: The extension of the cylinder's telescopic rod can move the stamp downwards, allowing the stamping surface to contact the tender document, automatically stamping the tender document and improving work efficiency. The rotation of the electric roller can cause individual tender documents in the bound tender document to arch upwards. A lever can be used to move the arched individual tender documents in the bound tender document, turning the pages and stamping the entire bound tender document. This provides greater flexibility and can adapt to various types of tender documents. Attached Figure Description

[0014] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown.

[0015] Figure 2 A three-dimensional structural schematic diagram of the mounting bracket, the first electric guide rail, the cylinder, and the lifting frame of the present invention is shown.

[0016] Figure 3 A three-dimensional structural schematic diagram of the second electric guide rail, the moving plate, the third electric guide rail, and the moving block of the present invention is shown.

[0017] Figure 4 A three-dimensional structural schematic diagram of the slide bar, insertion hole, insertion rod, movable frame, spring, and cylinder of the present invention is shown.

[0018] Figure 5 A cross-sectional view of the cylinder of the present invention is shown.

[0019] Figure 6 A three-dimensional structural schematic diagram of the feeding mechanism of the present invention is shown.

[0020] Figure 7 A schematic diagram of a second three-dimensional structure of the feeding mechanism of the present invention is shown.

[0021] Figure 8 A three-dimensional structural schematic diagram of the screw and arc plate of the present invention is shown.

[0022] Figure 9 A three-dimensional structural schematic diagram of the page-turning mechanism of the present invention is shown.

[0023] Figure 10 A three-dimensional structural schematic diagram of the second rotating plate and electric roller of the present invention is shown.

[0024] Figure 11 The diagram shows the state of the electric roller of the present invention after it rotates upward.

[0025] Figure 12 A first three-dimensional structural schematic diagram of the second bidirectional lead screw and limiting plate of the present invention is shown.

[0026] Figure 13 A schematic diagram of a second three-dimensional structure of the second bidirectional lead screw and limiting plate of the present invention is shown.

[0027] Figure 14 A three-dimensional structural schematic diagram of the receiving plate of the present invention is shown.

[0028] Figure 15 A three-dimensional structural schematic diagram of the opening and circular groove of the present invention is shown.

[0029] Figure 16 A three-dimensional structural diagram of the receiving plate and the ball clamping device of the present invention is shown.

[0030] In the attached diagram, the markings are as follows: 1: Mounting box, 2: Mounting plate, 3: Housing, 4: Mounting frame, 5: First electric guide rail, 6: Cylinder, 7: Lifting frame, 8: Second electric guide rail, 9: Moving plate, 10: Third electric guide rail, 11: Moving block, 12: Slide rod, 13: Insertion hole, 14: Insertion rod, 15: Moving frame, 16: Stamp, 17: Gear, 18: Spring, 19: Cylinder, 20: Ink pad, 21: Rack, 22: Conveyor, 23: First rotating shaft, 24: Servo motor, 25: Feeding wheel, 26: First rotating plate, 27. 28: Second rotating shaft; 29: First hexagonal sleeve; 30: First conveyor wheel; 31: Second hexagonal sleeve; 32: Second conveyor wheel; 33: Conveyor belt; 34: First bidirectional lead screw; 35: Second connecting plate; 36: Screw; 37: Arc plate; 38: Second rotating plate; 39: Electric roller; 391: Baffle; 40: Stepper motor; 41: Lever; 411: Door panel; 42: Second bidirectional lead screw; 43: Limiting plate; 44: Opening; 45: Circular groove; 46: Receiving plate; 47: Ball clamp; 48: Handle. Detailed Implementation

[0031] The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0032] Reference Figures 1-11An automatic stamping device for tender documents includes a mounting box 1, a mounting plate 2, a housing 3, a mounting frame 4, a first electric guide rail 5, a cylinder 6, a lifting frame 7, a second electric guide rail 8, a moving plate 9, a third electric guide rail 10, a moving block 11, a slide rod 12, an insertion rod 14, a moving frame 15, a stamp 16, a gear 17, a spring 18, a cylinder 19, ink pad 20, a rack 21, a feeding mechanism, and a page-turning mechanism. The mounting plate 2 is bolted to the center of the mounting box 1. The housing 3 is bolted to the top of the mounting box 1. The mounting frame 4 is bolted to the top of the housing 3. The first electric guide rail 5 is bolted to both the front and rear sides of the mounting frame 4. A cylinder 6 is bolted between the sliders of the two first electric guide rails 5. The lower end of the telescopic rod of the cylinder 6 is connected to the lifting frame 7. The second electric guide rail 8 is bolted to the top left and right sides of the lifting frame 7. The bottom of the sliders of the second electric guide rail 8 is connected to the moving plate 9. The third electric guide rail 9 is bolted to the bottom front and rear sides of the moving plate 9. Moving blocks 11 are connected to the sliders of the moving guide rail 10 and the third electric guide rail 10. Sliding rods 12 are slidably connected to the moving blocks 11. Insertion holes 13 are opened at the upper and lower parts of the sliding rods 12. Insertion rods 14 are slidably connected to the moving blocks 11. Moving frames 15 are connected to the lower ends of the sliding rods 12. Stamps 16 are rotatably connected to the lower parts of the moving frames 15. Gears 17 are connected to both sides of the stamps 16. Springs 18 are connected to the upper parts of the moving frames 15. Cylinders 19 are connected to the lower ends of the springs 18. 15 is located inside cylinder 19, and the movable frame 15 and cylinder 19 are slidably connected. The upper part of cylinder 19 is connected to ink pad 20 by threads. The stamping surface of stamp 16 contacts the bottom of ink pad 20. The lower left and right sides of cylinder 19 are connected to racks 21. The number of teeth of gear 17 is twice the number of teeth of rack 21. Gear 17 will mesh with rack 21 during downward movement. The feeding mechanism is used to transport the tender documents to the bottom of stamp 16. The page turning mechanism is used to turn the pages of the bound tender documents.

[0033] Reference Figures 6-8The feeding mechanism includes a conveyor 22, a first rotating shaft 23, a servo motor 24, a feeding wheel 25, a first rotating plate 26, a second rotating shaft 27, a first hexagonal sleeve 28, a first conveyor wheel 29, a second hexagonal sleeve 30, a second conveyor wheel 31, a conveyor belt 32, an adjusting assembly, and a limiting assembly. The conveyor 22 is installed on the left side inside the mounting box 1, passing through the mounting plate 2. The first rotating shaft 23 is rotatably connected inside the mounting box 1. The servo motor 24 is bolted to the front side of the mounting box 1. The output shaft of the servo motor 24 is connected to the front end of the first rotating shaft 23 via a coupling. The feeding wheel 25 is connected to the middle of the first rotating shaft 23. The first rotating plate 26 is rotatably connected to both the front and rear of the first rotating shaft 23. The right sides of the two first rotating plates 26 are rotatably connected to the second rotating wheel 31. The first rotating shaft 27 and the first rotating shaft 23 are both connected to the front and rear of the first hexagonal sleeve 28. The first hexagonal sleeve 28 is slidably connected to the first conveyor wheel 29. The first conveyor wheel 29 can slide on the first hexagonal sleeve 28 and the first hexagonal sleeve 28 can drive the first conveyor wheel 29 to rotate. The second rotating shaft 27 is both connected to the front and rear of the second hexagonal sleeve 30. The second hexagonal sleeve 30 is slidably connected to the second conveyor wheel 31. The second conveyor wheel 31 can slide on the second hexagonal sleeve 30 and the second hexagonal sleeve 30 can drive the second conveyor wheel 31 to rotate. The second conveyor wheel 31 and the first conveyor wheel 29 are wound with conveyor belts 32. The adjusting component is used to adjust the distance between the two conveyor belts 32. The limiting component is used to limit the label on the mounting plate 2.

[0034] Reference Figure 6 and Figure 7 The adjustment assembly includes a first connecting plate 33, a first bidirectional lead screw 34, and a second connecting plate 35. The tops of the two first rotating plates 26 are connected to the first connecting plate 33. The first bidirectional lead screw 34 is rotatably connected to the right side of the first connecting plate 33. The second connecting plate 35 is rotatably connected to the second conveying wheel 31 and the first conveying wheel 29. Both second connecting plates 35 are threaded to the first bidirectional lead screw 34. The threads on the two second connecting plates 35 are in opposite directions, so the first bidirectional lead screw 34 can drive the two second connecting plates 35 to move in opposite directions. The first bidirectional lead screw 34 slides through the rear side of the mounting box 1, which makes it convenient for the staff to rotate the first bidirectional lead screw 34, and the first bidirectional lead screw 34 has sufficient rotation space.

[0035] Reference Figure 8 The limiting component includes a screw 36 and an arc plate 37. The upper front and rear sides of the mounting box 1 are rotatably connected to the screw 36, and the arc plate 37 is threadedly connected to both screws 36.

[0036] Reference Figures 9-11The page-turning mechanism includes a second rotating plate 38, an electric roller 39, a baffle 391, a stepper motor 40, a lever 41, and a door panel 411. The second rotating plate 38 is rotatably connected to the rear of the first rotating shaft 23. The second rotating plate 38 slides through the mounting plate 2. A handle is located on the rear side of the second rotating plate 38, and the handle slides through the rear side of the mounting box 1, allowing the second rotating plate 38 to be rotated by gripping the handle. An electric roller 39 is mounted on the lower part of the second rotating plate 38. 9 is located inside the mounting box 1. Two baffles 391 are hinged to the top rear side of the mounting plate 2. The baffles 391 can block the bid documents and prevent them from falling into the mounting box 1. A torsion spring connects the baffles 391 and the mounting plate 2. Stepper motors 40 are bolted to the top front and rear sides of the mounting plate 2. A lever 41 is connected to the output shaft of each stepper motor 40. A door panel 411 is hinged to the front side of the mounting box 1. Through holes for the lever 41 to pass through are opened at the bottom of the door panel 411 and the rear side of the mounting box 1.

[0037] The operator rotates screw 36, causing arc plate 37 to move up and down, adjusting the distance between arc plate 37 and mounting plate 2. This distance can be adjusted according to the rear end of a single tender document, ensuring only one tender document is conveyed at a time and accommodating tender documents of varying thicknesses. A stack of tender documents is then placed on mounting plate 2, with the bottommost document contacting conveyor 22. Second electric guide rail 8 moves stamp 16 left and right, while third electric guide rail 10 moves stamp 16 back and forth, adjusting its position to accommodate different tender documents. Pulling the insertion rod 14 out of insertion hole 13 releases the slide rod 12, which can then be moved up and down to adjust the stamp position. The height of the stamp 16 is adjusted by inserting the insertion rod 14 into the upper insertion hole 13, resulting in a lower stamp height and a higher stamp height when the insertion rod 14 is inserted into the lower insertion hole 13. The lower stamp height allows for stamping, while the higher height prevents stamping. The height can be adjusted according to the number of stamps required to accommodate different tender documents. After adjusting the stamp 16, the conveyor 22 is started, transporting the tender documents to the right. The tender documents will contact the feeding wheel 25 and the conveyor belt 32. The servo motor 24 is then started. The output shaft of the servo motor 24 drives the first rotating shaft 23 and the first hexagonal sleeve 28 to rotate. The first hexagonal sleeve 28 drives the first conveyor wheel 29 to rotate, which in turn drives the conveyor belt 32 to rotate. The rotation of the shaft 23 also drives the feeding wheel 25 to rotate. The feeding wheel 25 and the conveyor belt 32 can transport the bid to the right, delivering the bid directly below the stamp 16. Rotating the first bidirectional lead screw 34 can drive the two second connecting plates 35 to move in opposite directions, thereby driving the two conveyor belts 32 to move in opposite directions. Adjusting the distance between the two conveyor belts 32 can be adjusted according to the width of the bid to accommodate bids of different widths. When the bid moves directly below the stamp 16, the telescopic rod of the control cylinder 6 extends, driving the lifting frame 7 to move downward. The lifting frame 7 drives the moving frame 15, the stamp 16, and the cylinder 19 to move downward. The cylinder 19 moves downward and contacts the bid, after which the cylinder 19 stops moving downward. As the moving frame 15 and stamp 16 continue to move downwards, spring 18 compresses, causing the stamping surface of stamp 16 to disengage from ink pad 20. The downward movement of stamp 16 also drives gear 17 downwards. During this downward movement, gear 17 meshes with rack 21, rolling on it. Gear 17 rotates stamp 16, flipping it so that the stamping surface faces down. When gear 17 disengages from rack 21, it stops rotating. Since gear 17 has twice the number of teeth as rack 21, it has rotated exactly 180 degrees, ensuring the stamping surface of stamp 16 faces down. The stamping surface of stamp 16 then moves downwards to contact the tender document, automatically stamping it and improving work efficiency.After stamping, the telescopic rod of the control cylinder 6 shortens, causing the moving frame 15 and the stamp 16 to move upwards. The spring 18 gradually returns to its original state. The upward movement of the stamp 16 drives the gear 17 to move upwards. During its upward movement, the gear 17 meshes with the rack 21, and the gear 17 rolls on the rack 21. The gear 17 can drive the stamp 16 to rotate, flipping the stamp 16 so that the stamping surface of the stamp 16 faces upwards. When the gear 17 and the rack 21 disengage, the gear 17 stops rotating. The number of teeth of the gear 17 is twice the number of teeth of the rack 21, so the gear 17 has rotated exactly 180 degrees, and the stamping surface of the stamp 16 is exactly facing upwards. After spring 18 returns to its original state, the stamping surface of seal 16 and ink pad 20 re-contact each other, ensuring the clarity of the next stamping. When it is necessary to stamp the bound tender documents, the staff controls the first electric guide rail 5 to move the lifting frame 7 to the right, moving the lifting frame 7 away to make room for the first rotating plate 26 and conveyor belt 32 to rotate upward. Then, the first rotating plate 26 is rotated upward, moving the first rotating plate 26 and conveyor belt 32 away to make room for the bound tender documents. Then, the second rotating plate 38 is rotated upward, driving the electric roller 39 to rotate upward, rotating the electric roller 39 above the mounting plate 2. 9 will contact the baffle 391 and push the baffle 391 upward. The torsion spring deforms, and after the electric roller 39 and the baffle 391 disengage, the baffle 391 rotates downward to reset under the action of the torsion spring. Then, the staff opens the door panel 411, places the bound bid documents on the mounting plate 2, and opens the bound bid documents. Then, the second rotating plate 38 is rotated in the opposite direction to make the electric roller 39 contact the bound bid documents. Then the door panel 411 is closed. Then, the first electric guide rail 5 drives the lifting frame 7 to move to the left, moving the stamp 16 directly above the bound bid documents. Then, the telescopic rod of the cylinder 6 is controlled to extend, bringing... The movable stamp 16 moves downwards to stamp the bound tender document. After stamping, the telescopic rod of the control cylinder 6 shortens, causing the stamp 16 to move upwards and reset. Then, the electric roller 39 is activated. The rotation of the electric roller 39 causes the individual tender documents in the bound tender document to arch upwards. Subsequently, the output shaft of the stepper motor 40 rotates 360 degrees, causing the lever 41 to rotate 360 ​​degrees. The lever 41 can then turn the individual tender documents in the bound tender document, allowing for page turning. In this way, the entire bound tender document can be stamped, providing greater flexibility and adapting to various types of tender documents.

[0038] Reference Figure 12 and Figure 13It also includes a second bidirectional lead screw 42 and a limiting plate 43. The second bidirectional lead screw 42 is rotatably connected to the left side of the mounting box 1. The front and rear sides of the top left side of the mounting plate 2 are slidably connected to the limiting plates 43. Both limiting plates 43 are threadedly connected to the second bidirectional lead screw 42. The threads on the two limiting plates 43 are in opposite directions, so the second bidirectional lead screw 42 can drive the two limiting plates 43 to move in opposite directions.

[0039] After the bid documents are stamped, the feeding wheel 25 and the conveyor belt 32 continue to transport the bid documents to the right, conveying the stamped bid documents to the receiving plate 46. The receiving plate 46 can receive the stamped bid documents for easy collection. Pull the receiving plate 46 to the right to disengage the ball 47 from the groove 45, and the receiving plate 46 can be taken out from the opening 44. Then, the stamped bid documents on the receiving plate 46 can be taken out.

[0040] Reference Figures 14-16 It also includes a receiving plate 46 and a retaining ball 47. The mounting plate 2 has an opening 44 on the right side. The opening 44 has symmetrical circular grooves 45 on both the front and back sides. The receiving plate 46 is used to receive the stamped tender documents. The receiving plate 46 has symmetrical retaining balls 47 on both the front and back sides. The retaining balls 47 are located in the circular grooves 45. The receiving plate 46 is held in the opening 44 by the retaining balls 47.

[0041] The staff places a stack of bids on the mounting plate 2. The limiting plate 43 can limit the bids to ensure that they are kept neat. Rotating the second double-acting screw 42 can drive the two limiting plates 43 to move in opposite directions. Adjusting the distance between the two limiting plates 43 can be adjusted according to the width of the bids to accommodate bids of different widths.

[0042] Reference Figure 7 It also includes a handle 48, and the handle 48 is connected to the rear side of the first rotating plate 26. The handle 48 slides through the mounting box 1, and the first rotating plate 26 can be rotated by holding the handle 48, making the operation more convenient.

[0043] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. All equivalent substitutions made within the principles of the present invention should be included within the scope of protection of the present invention. Contents not described in detail in this invention are existing technologies known to those skilled in the art.

Claims

1. An automatic stamping device for tender documents, comprising a mounting box (1), a mounting plate (2), and a housing (3), wherein the mounting plate (2) is connected inside the mounting box (1), and the housing (3) is connected to the top of the mounting box (1), characterized in that, It also includes a mounting frame (4), a first electric guide rail (5), a cylinder (6), a lifting frame (7), a second electric guide rail (8), a moving plate (9), a third electric guide rail (10), a moving block (11), a slide bar (12), a plug bar (14), a moving frame (15), a stamp (16), a gear (17), a spring (18), a cylinder (19), ink pad (20), a rack (21), a feeding mechanism, and a page-turning mechanism. The top of the outer shell (3) is connected to the mounting frame (4). The first electric guide rail (5) is installed inside the mounting frame (4). A cylinder (6) is installed on the slider of the first electric guide rail (5). A lifting frame (7) is connected to the telescopic rod of the cylinder (6). The top of the lifting frame (7) is installed with the second electric guide rail (8). A moving plate (9) is connected to the slider of the second electric guide rail (8). The bottom of the moving plate (9) is installed with the third electric guide rail (10). A moving block (11) is connected to the slider of the third electric guide rail (10). A sliding rod (12) is slidably connected to the movable block (11). Insertion holes (13) are opened at both the upper and lower parts of the sliding rod (12). A plug rod (14) is slidably connected to the movable block (11). The plug rod (14) can be inserted into the insertion hole (13) to fix the sliding rod (12). A movable frame (15) is connected to the sliding rod (12). A stamp (16) is rotatably connected to the movable frame (15). A gear (17) is connected to the stamp (16). A spring (18) is connected to the movable frame (15). 8) A cylinder (19) is connected to the spring (18), and a movable frame (15) is located inside the cylinder (19). The movable frame (15) and the cylinder (19) are slidably connected. An ink pad (20) is connected inside the cylinder (19) by a thread. The stamping surface of the stamp (16) is in contact with the bottom of the ink pad (20). A rack (21) is connected inside the cylinder (19). The feeding mechanism is used to transport the tender documents to the bottom of the stamp (16). The page-turning mechanism is used to turn the pages of the bound tender documents. The feeding mechanism includes a conveyor (22), a first rotating shaft (23), a servo motor (24), a feeding wheel (25), a first rotating plate (26), a second rotating shaft (27), a first hexagonal sleeve (28), a first conveyor wheel (29), a second hexagonal sleeve (30), a second conveyor wheel (31), a conveyor belt (32), an adjustment component, and a limit component. The conveyor (22) is installed inside the mounting box (1). The conveyor (22) passes through the mounting plate (2), places the bid on the mounting plate (2), and makes the bid contact with the conveyor (22). The conveyor (22) conveys the bid to the right and delivers the bid directly below the seal (16). The first rotating shaft (23) is rotatably connected inside the mounting box (1). The servo motor (24) is installed on the mounting box (1). The output shaft of the servo motor (24) and the first rotating shaft are connected to the first rotating shaft. (23) Connection: A feeding wheel (25) is connected to the first rotating shaft (23). The first rotating shaft (23) is rotatably connected to the front and rear of the first rotating shaft (23). The two first rotating plates (26) are rotatably connected to the second rotating shaft (27). The first rotating shaft (23) is connected to the front and rear of the first rotating shaft (23). The first hexagonal sleeve (28) is slidably connected to the first hexagonal sleeve (28). The second rotating shaft (27) is connected to the front and rear of the second hexagonal sleeve (30). The second hexagonal sleeve (30) is slidably connected to the second hexagonal sleeve (30). The second conveyor wheel (31) is slidably connected to the second conveyor wheel (31) and the first conveyor wheel (29). A conveyor belt (32) is wound around the second conveyor wheel (31) and the first conveyor wheel (29). The adjustment component is used to adjust the distance between the two conveyor belts (32). The limiting component is used to limit the label on the mounting plate (2). The page-turning mechanism includes a second rotating plate (38), an electric roller (39), a baffle (391), a stepper motor (40), a lever (41), and a door panel (411). The second rotating plate (38) is rotatably connected to the first rotating shaft (23). The second rotating plate (38) slides through the mounting plate (2). An electric roller (39) is installed at the lower part of the second rotating plate (38). The electric roller (39) is located inside the mounting box (1). A baffle (391) is hinged to the top of the mounting plate (2). A torsion spring is connected between the baffle (391) and the mounting plate (2). Stepper motors (40) are installed on both the front and rear sides of the top of the mounting plate (2). A lever (41) is connected to the output shaft of each stepper motor (40). A door panel (411) is hinged to the front side of the mounting box (1). A through-hole for the lever (41) to pass through is opened at the lower part of the door panel (411) and the rear side of the mounting box (1).

2. An automatic stamping device for tender documents according to claim 1, characterized in that, The adjustment assembly includes a first connecting plate (33), a first bidirectional lead screw (34), and a second connecting plate (35). The tops of the two first rotating plates (26) are connected to the first connecting plate (33). The first bidirectional lead screw (34) is rotatably connected to the first connecting plate (33). The second connecting plate (35) is rotatably connected to the second conveying wheel (31) and the first conveying wheel (29). Both second connecting plates (35) are threaded to the first bidirectional lead screw (34). The first bidirectional lead screw (34) slides through the mounting box (1).

3. An automatic stamping device for tender documents according to claim 2, characterized in that, The limiting assembly includes a screw (36) and an arc plate (37). Two screws (36) are rotatably connected inside the mounting box (1). The two screws (36) are connected by threads to an arc plate (37) for limiting the markings on the mounting plate (2).

4. An automatic stamping device for tender documents according to claim 3, characterized in that, It also includes a second bidirectional lead screw (42) and a limiting plate (43). The second bidirectional lead screw (42) is rotatably connected inside the mounting box (1). The limiting plates (43) are slidably connected to the front and rear sides of the top of the mounting plate (2). Both limiting plates (43) are threadedly connected to the second bidirectional lead screw (42).

5. An automatic stamping device for tender documents according to claim 4, characterized in that, It also includes a receiving plate (46) and a retaining ball (47). The mounting plate (2) has an opening (44) on the right side. There are circular grooves (45) on both the front and back sides of the opening (44). The receiving plate (46) is used to receive the stamped tender documents. The receiving plate (46) is connected to retaining balls (47) on both the front and back sides. The retaining balls (47) are located in the circular grooves (45). The receiving plate (46) is held in the opening (44) by the retaining balls (47).

6. An automatic stamping device for tender documents according to claim 5, characterized in that, It also includes a handle (48), which is connected to the first rotating plate (26) on the rear side, and the handle (48) slides through the mounting box (1).

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