Turnover book stacking mechanism

Abstract

The invention belongs to the technical field of three-side book trimmer, and discloses a turnover book stacking mechanism which comprises a rack, a first base and a second base which are oppositely arranged are arranged on the rack, the first base is rotationally connected with a first rotating shaft, the second base is rotationally connected with a second rotating shaft, two first supporting rod sets are fixed to the first rotating shaft, and two second supporting rod sets are fixed to the second rotating shaft. Two second supporting rod sets are fixed to the second rotating shaft, and the rack is provided with a power device. Compared with the prior art, the book stacking device has the following advantages and effects that after books are sequentially stacked on the first supporting rod set and the second supporting rod set and reach the preset number or the preset thickness, the first rotating shaft and the second rotating shaft are driven by the power device to rotate by 180 degrees, the books fall onto the first supporting plate and the second supporting plate, and after the first supporting plate and the second supporting plate are far away from each other, the books are stacked; and meanwhile, the other first supporting rod group of the first rotating shaft and the other second supporting rod group of the second rotating shaft rotate to the horizontal position to support the books behind, so that the effects of automatically overturning and stacking the books and being high in efficiency are achieved.

Description

Technical Field

[0001] This invention relates to the field of perfect binding production line technology, and in particular to a book-flipping and stacking mechanism. Background Technology

[0002] After printing, the pages undergo collating, hot melt adhesive bonding, drying, and conveying. They then need to have their three-sided rough edges trimmed neatly. This three-sided trimming is done by a three-sided book trimmer equipped with three sets of cutters to trim the top, bottom, and slit edges respectively. Before the three-sided trimming, the books on the conveyor belt are stacked into a pile. The stack is then cut during the trimming process, allowing for the simultaneous cutting of multiple books and improving efficiency. In the conveying process, the books are spaced apart on the conveyor belt. Currently, many machines lack a stacking mechanism, requiring workers to manually stack the books, which is labor-intensive and inefficient. Summary of the Invention

[0003] The purpose of this invention is to provide a book-flipping and stacking mechanism that has the effects of automated book flipping and stacking and high book-stacking efficiency.

[0004] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a book-flipping mechanism, including a frame, on which a first base and a second base are provided oppositely arranged, the first base is rotatably connected to a first rotating shaft, the second base is rotatably connected to a second rotating shaft, the first rotating shaft is fixed with two sets of symmetrically arranged first support rods, the second rotating shaft is fixed with two sets of symmetrically arranged second support rods, and the frame is provided with a power device for driving the first rotating shaft and the second rotating shaft to rotate.

[0005] By adopting the above technical solution, a work station is formed between the first base and the second base, equipped with two conveyor belt devices. One conveyor belt device is located above the work station to transport books one by one into the work station. The other conveyor belt device is located below the work station to transport any stacks or books that fall into the work station to the next processing station.

[0006] When books need to be stacked to form a book pile, the positions of the first and second rotating shafts are controlled to adjust the positions of the first and second support rod groups to a horizontal state. One set of the first support rod group and one set of the second support rod group are located within the work station to support the books conveyed by the conveyor belt. When a certain number of books have been stacked, the power unit drives the first and second rotating shafts to rotate rapidly 180°, causing the resulting book pile to fall downwards. Simultaneously, another set of the first and second support rod groups moves into the work station to receive the books that are subsequently conveyed. The rapid rotation of the first and second rotating shafts in this invention meets the needs of high-speed perfect binding production lines.

[0007] When it is necessary to provide books one by one to the downstream process, instead of piles of books, by controlling the rotation position of the first and second rotating shafts, the first and second support rod groups are made to be in a vertical state. At this time, both sets of the first and second support rod groups are outside the work station, and the books are transported directly from the work station to the conveyor belt device below.

[0008] When books need to be sorted, the first and second rotating shafts are controlled to adjust their positions to a horizontal state. One set of the first and one set of the second supporting rods are located within the workstation to support the books conveyed by the conveyor belt. After each book is caught, both the first and second rotating shafts rotate rapidly 180° to receive the next book, thus completing the sorting operation.

[0009] A further configuration of the present invention is that the first base is provided with a first limiting stop, and the second base is provided with a second limiting stop.

[0010] By adopting the above technical solution, the first limit stop and the second limit stop are used to block and limit the side of the stack of books.

[0011] A further configuration of the present invention is as follows: the second base is fixed with a stand, the stand is provided with a buffer plate on the side near the first base, the buffer plate is fixed with a guide rod, the stand is provided with a guide hole for the guide rod to pass through, and the stand is equipped with a hydraulic buffer, the hydraulic buffer being used to buffer the buffer plate after being impacted.

[0012] By adopting the above technical solution, when the book is transported to the position between the first base and the second base, it first impacts the buffer plate, and the hydraulic buffer and the buffer plate play a buffering role on the book.

[0013] A further configuration of the present invention is as follows: a first cylinder is mounted and fixed on the first base, a first support plate is fixed on the piston rod of the first cylinder, a second cylinder is mounted and fixed on the second base, a second support plate is fixed on the piston rod of the second cylinder, the first support plate and the second support plate are flush with each other and arranged opposite to each other, and both the first support plate and the second support plate are lower than the first support rod assembly.

[0014] By adopting the above technical solution, the first pallet and the second pallet are used to support the descending stack of books, and then place them on the conveyor belt device below. Since the conveying speed of the stack of books is much smaller than that of individual books, the speed requirements of the high-speed perfect binding production line can also be met by the extension and retraction of the cylinder.

[0015] A further configuration of the present invention is as follows: the first rotating shaft is fixed with two first paddles, the two first paddles being symmetrically arranged about the center line of the first rotating shaft; a first sliding member is slidably connected to the first base, the first sliding member being lower than the first rotating shaft; one end of the first sliding member is connected to a first clamp; the other end of the first sliding member is fixed with a first spring; the end of the first spring away from the first sliding member is mounted and fixed on the first base; the first sliding member is provided with a first stop for the first paddles to contact and move; the second rotating shaft is fixed with two second paddles, the two second paddles being symmetrically arranged about the center line of the second rotating shaft; a second sliding member is slidably connected to the second base, the second sliding member being lower than the second rotating shaft; one end of the second sliding member is connected to a second clamp; the other end of the second sliding member is fixed with a second spring; the end of the second spring away from the second sliding member is mounted and fixed on the second base; the second sliding member is provided with a second stop for the second paddles to contact and move.

[0016] By adopting the above technical solution, the books conveyed by the upper conveyor belt device are theoretically spaced approximately evenly. However, in practice, if two or more books are placed close together or stacked, the number of books entering the first and second support groups will exceed the designed number, which is difficult to detect manually on a high-speed perfect binding production line.

[0017] This invention utilizes a first clamp and a second clamp. The height difference between the lower ends of the first and second clamps and the first and second support plates determines the designed height of the book stack. During the rotation of the first rotating shaft, a first deflector on the first rotating shaft first contacts a first stop, actuating the first stop and a first sliding member, causing the first clamp to move away from the second clamp, allowing the book stack to fall smoothly from the first and second support rod assemblies onto the first and second support plates. As the first rotating shaft continues to rotate, after the first deflector leaves the first stop, a first spring drives the first sliding member to move, causing the first clamp to move closer to the second clamp. The movement of the second clamp is similar to that of the first clamp and will not be described in detail here.

[0018] Therefore, when the stack of books falling onto the first and second trays exceeds the designed height, the first and second clamps will hold the excess books. In specific implementation, the clamping positions of the first and second clamps are preferably at the ends of the book spines. At this time, when the first and second cylinders drive the first and second trays away from each other, the stack of books falls downwards, while the excess books do not fall downwards, thus achieving an automatic error correction function.

[0019] A further configuration of the present invention is as follows: the first sliding member includes a first slider and a first connecting rod fixed to the first slider; the first slider is slidably connected to the first base; a first through hole is provided on the first limiting stop; the first connecting rod passes through the first through hole and is fixed to the first clamp; the second sliding member includes a second slider and a second connecting rod fixed to the second slider; the second slider is slidably connected to the second base; a second through hole is provided on the second limiting stop; the second connecting rod passes through the second through hole and is fixed to the second clamp.

[0020] A further configuration of the present invention is as follows: the first limiting stop has a first groove, and one side of the first clamp is embedded in the first groove; the second limiting stop has a second groove, and one side of the second clamp is embedded in the second groove.

[0021] By adopting the above technical solution, the design of the first groove and the second groove makes the movement of the first clamp and the second clamp smooth.

[0022] A further provision of the present invention is that a detection device for detecting the number of books between the first clamp and the second clamp is installed on the frame.

[0023] By adopting the above technical solution, the detection device can be a machine vision-related device or other detection device. After detecting the number of books held between the first clamp and the second clamp, the number of books supported on the first support rod group and the second support rod group is reduced accordingly to ensure that the number of books falling onto the first support plate and the second support plate next time is the designed number and the height of the stack of books is the designed height.

[0024] A further configuration of the present invention is as follows: a first slide is provided at the bottom of the first base, a second slide is provided at the bottom of the second base, the frame is fixed with a slide rail, and the first slide and the second slide are slidably connected to the slide rail.

[0025] By adopting the above technical solution, when processing books of different sizes, it is necessary to adjust the distance between the first base and the second base. The specific positioning methods of the first base and the second base can be varied, such as fixing the first slide and the second slide to the slide rail or frame with bolts, or adjusting the first base and the second base by a lead screw pair, etc.

[0026] A further configuration of the present invention is as follows: the power device includes a first transmission shaft rotatably connected to the frame, a second transmission shaft rotatably connected to the frame, and a motor driving the first transmission shaft to rotate. A coupling is installed between the first transmission shaft and the second transmission shaft. A first movable bevel gear and a first intermediate transmission shaft are rotatably connected to the first base. The first intermediate transmission shaft is equipped with a first transmission bevel gear, which meshes with the first transmission gear. The first movable bevel gear is sleeved on the first transmission shaft. A first sliding key is provided axially on the outer wall of the first transmission shaft. A first keyway is opened in the central hole of the first movable bevel gear, and the first sliding key is embedded in the first keyway. A first synchronous pulley is fixed to the first intermediate transmission shaft, and a second synchronous pulley is fixed to the first rotating shaft. The first synchronous pulley and... A first synchronous belt is installed between the second synchronous pulleys. A first sensor for detecting the rotation of the first shaft is also provided on the first base. A second movable bevel gear and a second intermediate transmission shaft are rotatably connected to the second base. A second transmission bevel gear is installed on the second intermediate transmission shaft. The second movable bevel gear meshes with the second transmission gear. The second movable bevel gear is sleeved on the second transmission shaft. A second sliding key is provided axially on the outer wall of the second transmission shaft. A second keyway is opened in the central hole of the second movable bevel gear. The second sliding key is embedded in the second keyway. A third synchronous pulley is fixed on the second intermediate transmission shaft. A fourth synchronous pulley is fixed on the second shaft. A second synchronous belt is installed between the third synchronous pulley and the fourth synchronous pulley. A second sensor for detecting the rotation of the second shaft is also provided on the second base.

[0027] By adopting the above technical solution, since the first and second bases are designed to move relative to the frame, but the power unit is mounted on the frame, conventional power transmission devices are difficult to meet the working requirements. This invention specifically designs the power unit by utilizing the design of the first sliding key, the first keyway, the second sliding key, and the second keyway, so that during the movement of the first and second bases, the first movable bevel gear and the second movable bevel gear move on the first and second transmission shafts, respectively.

[0028] The beneficial effects of this invention are as follows: After the books are stacked sequentially on the first support rod group and the second support rod group to reach a predetermined quantity or a preset thickness, the invention drives the first and second rotating shafts to rotate 180° via a power device. The stack of books falls onto the first and second pallets. After the first and second pallets move away from each other, the stack of books falls onto the conveyor belt device below. At the same time, another set of first support rods on the first rotating shaft and another set of second support rods on the second rotating shaft rotate to a horizontal position to support the books behind, achieving the effect of automated book stacking and high efficiency. Attached Figure Description

[0029] Figure 1This is a schematic diagram of the structure of Example 1.

[0030] Figure 2 This is a schematic diagram of the connection relationship between the power unit and the first rotating shaft in Embodiment 1.

[0031] Figure 3 This is a schematic diagram of the connection relationship between the power unit and the second rotating shaft in Embodiment 1.

[0032] Figure 4 This is a schematic diagram showing the positional relationship between the first base, the second base, the first support plate, and the second support plate in Embodiment 1.

[0033] Figure 5 This is a schematic diagram showing the positional relationship between the first base, the second base, the first slider, and the second slider in Embodiment 2.

[0034] Figure 6 yes Figure 5 Enlarged view of point A.

[0035] Figure 7 yes Figure 5 Enlarged view of point B.

[0036] Figure 8 This is a schematic diagram of the separated state of the first slider in Embodiment 2.

[0037] In the diagram, 1. Frame; 11. First spring; 12. Second spring; 2. First base; 21. First rotating shaft; 211. First paddle; 22. First support rod assembly; 23. First limit stop; 231. First groove; 232. First through hole; 24. First cylinder; 25. First support plate; 26. First slide; 27. First sensor; 28. First intermediate drive shaft; 281. First transmission bevel gear; 282. First synchronous belt; 29. ​​First movable bevel gear; 3. Second base; 31. Second rotating shaft; 311. Second paddle; 32. Second support rod assembly; 33. Second limit stop; 34. Second cylinder; 35. Second support plate; 3 6. Second slide block; 37. Second sensor; 38. Second intermediate drive shaft; 381. Second drive bevel gear; 382. Second synchronous belt; 39. Second movable bevel gear; 4. Power unit; 41. First drive shaft; 411. First sliding key; 42. Second drive shaft; 421. Second sliding key; 43. Coupling; 45. Motor; 5. First sliding member; 51. First slider; 52. First connecting rod; 53. First stop; 6. First clamp; 7. Second sliding member; 71. Second slider; 72. Second connecting rod; 73. Second stop; 8. Second clamp; 9. Stand; 91. Hydraulic buffer; 92. Buffer plate; 93. Guide rod. Detailed Implementation

[0038] Example 1: A book-flipping mechanism, such as Figures 1 to 4 As shown, the system includes a frame 1, on which a first base 2 and a second base 3 are mounted opposite each other, forming a working station. A first slide 26 is fixed to the bottom of the first base 2, and a second slide 36 is fixed to the bottom of the second base 3. A slide rail is fixed to the frame 1, and both the first slide 26 and the second slide 36 are slidably connected to the slide rail. A lead screw is rotatably connected to the frame 1. The lead screw has threads with opposite directions at both ends, and two nuts are installed on the lead screw. The two nuts are fixed to the first base 2 and the second base 3 respectively. By rotating the lead screw forward and backward, the distance between the first base 2 and the second base 3 can be adjusted. A first rotating shaft 21 is rotatably connected to the first base 2, and a second rotating shaft 31 is rotatably connected to the second base 3. Two sets of symmetrically arranged first support plates 25 are fixed to the first rotating shaft 21, and two sets of symmetrically arranged second support plates 35 are fixed to the second rotating shaft 31.

[0039] The frame 1 is equipped with a power unit 4 for driving the first rotating shaft 21 and the second rotating shaft 31 to rotate. The power unit 4 includes a first transmission shaft 41 rotatably connected to the frame 1, a second transmission shaft 42 rotatably connected to the frame 1, and a motor 45 for driving the first transmission shaft 41 to rotate. A coupling 43 is installed between the first transmission shaft 41 and the second transmission shaft 42. A first movable bevel gear 29 and a first intermediate transmission shaft 28 are rotatably connected to the first base 2. A first transmission bevel gear 281 is installed on the first intermediate transmission shaft 28. The first movable bevel gear 29 meshes with the first transmission gear and is sleeved on the first transmission shaft 41. A first sliding key 411 is provided axially on the outer wall of the first transmission shaft 41. A first keyway is opened in the central hole of the first movable bevel gear 29, and the first sliding key 411 is embedded in the first keyway. A first synchronous pulley is fixed on the first intermediate transmission shaft 28, and a second synchronous pulley is fixed on the first rotating shaft 21. A coupling 43 is installed between the first synchronous pulley and the second synchronous pulley. The first base 2 is equipped with a first synchronous belt 282 and a first sensor 27 for detecting the rotation of the first rotating shaft 21. The second base 3 is rotatably connected to a second movable bevel gear 39 and a second intermediate transmission shaft 38. The second intermediate transmission shaft 38 is equipped with a second transmission bevel gear 381. The second movable bevel gear 39 meshes with the second transmission gear and is sleeved on the second transmission shaft 42. The outer wall of the second transmission shaft 42 is provided with a second sliding key 421 along the axial direction. A second keyway is opened in the middle hole of the second movable bevel gear 39, and the second sliding key 421 is embedded in the second keyway. The second intermediate transmission shaft 38 is fixed with a third synchronous pulley, and the second rotating shaft 31 is fixed with a fourth synchronous pulley. A second synchronous belt 382 is installed between the third synchronous pulley and the fourth synchronous pulley. The second base 3 is also equipped with a second sensor 37 for detecting the rotation of the second rotating shaft 31. Specifically, the first movable bevel gear 29 and the first intermediate transmission shaft 28 are both mounted on the first base 2 via bearings, and the second movable bevel gear 39 and the second intermediate transmission shaft 38 are both mounted on the second base 3 via bearings.

[0040] Working principle of power unit 4: Motor 45 drives the first transmission shaft 41 and the second transmission shaft 42 to rotate. The first transmission shaft 41 drives the first rotating shaft 21 to rotate via the first movable bevel gear 29, the first transmission bevel gear 281, the first intermediate transmission shaft 28, and the synchronous belt. The second transmission shaft 42 drives the second rotating shaft 31 to rotate via the second movable bevel gear 39, the second transmission bevel gear 381, the second intermediate transmission shaft 38, and the synchronous belt. During the process of the first base 2 and the second base 3 approaching and moving away from each other, the first movable bevel gear 29 moves on the first transmission shaft 41, and the second movable bevel gear 39 moves on the second transmission shaft 42.

[0041] A first base 2 is fixed with a first cylinder 24, and the piston rod of the first cylinder 24 is fixed with a first support plate 25. A second base 3 is fixed with a second cylinder 34, and the piston rod of the second cylinder 34 is fixed with a second support plate 35. The first support plate 25 and the second support plate 35 are flush and opposite to each other, and both the first support plate 25 and the second support plate 35 are lower than the first support rod assembly 22 and the second support rod assembly 32. The first cylinder 24 and the second cylinder 34 can move the first support plate 25 and the second support plate 35 closer together and further apart. When the first support plate 25 and the second support plate 35 are close together, they can support books or stacks of books. When the first support plate 25 and the second support plate 35 are far apart, the books or stacks of books fall downwards.

[0042] The second base 3 is fixed with a stand 9. A buffer plate 92 is provided on the side of the stand 9 closest to the first base 2. A guide rod 93 is fixed to the buffer plate 92. The stand 9 has a guide hole through which the guide rod 93 passes. A hydraulic buffer 91 is installed on the stand 9. The hydraulic buffer 91 is used to cushion the buffer plate 92 after impact. The buffer connection end of the piston rod of the hydraulic buffer 91 is connected to the buffer plate 92. The first base 2 is provided with a first limiting stop 23, and the second base 3 is provided with a second limiting stop 33. The first limiting stop 23 and the second limiting stop 33 are located on both sides of the work station and are used to limit and guide the books or stacks of books within the work station.

[0043] When books need to be stacked to form a book pile, the positions of the first rotating shaft 21 and the second rotating shaft 31 are controlled to adjust the positions of the first support rod group 22 and the second support rod group 32 to a horizontal state. One set of the first support rod group 22 and one set of the second support rod group 32 are located in the work station to support the books conveyed by the conveyor belt. When a certain number of books have been stacked, the power unit 4 drives the first rotating shaft 21 and the second rotating shaft 31 to rotate rapidly 180°, causing the stack of books to fall downwards. At the same time, the other set of the first support rod group 22 and the other set of the second support rod group 32 move into the work station to receive the books that are subsequently conveyed. The rapid rotation of the first rotating shaft 21 and the second rotating shaft 31 in this invention can meet the needs of high-speed perfect binding production lines.

[0044] When it is necessary to provide individual books to downstream processes, rather than piles of books, the rotation positions of the first rotating shaft 21 and the second rotating shaft 31 are controlled to make the first support rod group 22 and the second support rod group 32 in a vertical state. At this time, both sets of first support rod groups 22 and both sets of second support rod groups 32 are outside the work station, and the books conveyed directly fall from the work station onto the conveyor belt device below.

[0045] When books need to be sorted, the positions of the first rotating shaft 21 and the second rotating shaft 31 are controlled to adjust the positions of the first support rod group 22 and the second support rod group 32 to a horizontal state. One set of the first support rod group 22 and the other set of the second support rod group 32 are located within the work station to support the books conveyed by the conveyor belt. After each book is caught, the first rotating shaft 21 and the second rotating shaft 31 rotate rapidly 180° to receive the next book, thus completing the sorting operation.

[0046] Example 2: A book-flipping mechanism, such as Figures 5 to 8 As shown in Embodiment 1, a first rotating shaft 21 is fixed with two first paddles 211, which are symmetrically arranged about the center line of the first rotating shaft 21. A first sliding member 5 is slidably connected to the first base 2. The first sliding member 5 is lower than the first rotating shaft 21. One end of the first sliding member 5 is connected to a first clamp 6, and the other end of the first sliding member 5 is fixed with a first spring 11. The end of the first spring 11 away from the first sliding member 5 is mounted and fixed on the first base 2. The first sliding member 5 is provided with a first stop for the first paddles 211 to contact and move. Block 53; The second rotating shaft 31 is fixed with two second paddles 311, which are symmetrically arranged about the center line of the second rotating shaft 31. A second sliding member 7 is slidably connected to the second base 3. The second sliding member 7 is lower than the second rotating shaft 31. One end of the second sliding member 7 is connected to a second clamp 8. The other end of the second sliding member 7 is fixed with a second spring 12. The end of the second spring 12 away from the second sliding member 7 is installed and fixed on the second base 3. The second sliding member 7 is provided with a second stop 73 for the second paddles 311 to contact and move.

[0047] The first sliding member 5 includes a first slider 51 and a first connecting rod 52 fixed to the first slider 51. The first slider 51 is slidably connected to the first base 2. The first limiting stop 23 has a first through hole 232, and the first connecting rod 52 passes through the first through hole 232 and is fixed to the first clamp 6. The second sliding member 7 includes a second slider 71 and a second connecting rod 72 fixed to the second slider 71. The second slider 71 is slidably connected to the second base 3. The second limiting stop 33 has a second through hole, and the second connecting rod 72 passes through the second through hole and is fixed to the second clamp 8. The first limiting stop 23 has a first groove 231, and one side of the first clamp 6 is embedded in the first groove 231. The second limiting stop 33 has a second groove, and one side of the second clamp 8 is embedded in the second groove. A detection device for detecting the number of books between the first clamp 6 and the second clamp 8 is installed on the frame 1. The detection device can be a machine vision device or other detection devices.

[0048] The working principle of the first clamp 6 and the second clamp 8: The height difference between the lower ends of the first clamp 6 and the second clamp 8 and the first support plate 25 and the second support plate 35 is the designed height of the book stack. During the rotation of the first rotating shaft 21, the first lever 211 on the first rotating shaft 21 first contacts the first stop 53, causing the first stop 53 and the first sliding member 5 to move, moving the first clamp 6 away from the second clamp 8, so that the book stack can fall smoothly from the first support rod group 22 and the second support rod group 32 onto the first support plate 25 and the second support plate 35. As the first rotating shaft 21 continues to rotate, after the first lever 211 leaves the first stop 53, the first spring 11 drives the first sliding member 5 to move, causing the first clamp 6 to move towards the second clamp 8. The movement process of the second clamp 8 is similar to that of the first clamp 6, and will not be described in detail here.

[0049] Therefore, when the stack of books falling onto the first support plate 25 and the second support plate 35 exceeds the designed height, the first clamp 6 and the second clamp 8 will clamp the excess books. In specific implementation, the clamping positions of the first clamp 6 and the second clamp 8 are preferably at both ends of the spine of the books. At this time, when the first cylinder 24 and the second cylinder 34 drive the first support plate 25 and the second support plate 35 away from each other, the stack of books falls downwards, but the excess books do not fall downwards. After the detection device detects the number of books clamped between the first clamp 6 and the second clamp 8, the number of books supported on the first support rod group 22 and the second support rod group 32 is reduced accordingly to ensure that the number of books falling onto the first support plate 25 and the second support plate 35 next time is the designed number and the stack height is the designed height, thereby playing an automatic error correction role.

Claims

1. A mechanism for turning over a stack of books, characterized by: Including frame (1), the frame (1) is equipped with first base (2) and second base (3) of opposite arrangement, the first base (2) is rotatably connected with first rotating shaft (21), the second base (3) is rotatably connected with second rotating shaft (31), the first rotating shaft (21) is fixed with two groups of symmetrically arranged first supporting rod groups (22), the second rotating shaft (31) is fixed with two groups of symmetrically arranged second supporting rod groups (32), the frame (1) is equipped with power device (4) for driving the rotation of the first rotating shaft (21), second rotating shaft (31).

2. A mechanism for turning over a stack of books according to claim 1, characterized in that: The first base (2) is provided with a first limiting stop (23), and the second base (3) is provided with a second limiting stop (33).

3. A mechanism for turning over a stack of books according to claim 1, characterized in that: The second base (3) is fixed with a vertical seat (9), one side of the vertical seat (9) close to the first base (2) is provided with a buffer plate (92), the buffer plate (92) is fixed with a guide rod (93), the vertical seat (9) is provided with a guide hole for the guide rod (93) to pass through, the vertical seat (9) is installed with a hydraulic buffer (91), and the hydraulic buffer (91) is used to buffer the buffer plate (92) after being impacted.

4. A tip-up book block mechanism according to claim 2, wherein: The first base (2) is installed and fixed with a first cylinder (24), the piston rod of the first cylinder (24) is fixed with a first supporting plate (25), the second base (3) is installed and fixed with a second cylinder (34), the piston rod of the second cylinder (34) is fixed with a second supporting plate (35), the first supporting plate (25) and the second supporting plate (35) are flush and oppositely arranged, and the first supporting plate (25) and the second supporting plate (35) are lower than the first supporting rod group (22).

5. A tip-up book block mechanism according to claim 2, wherein: The first rotating shaft (21) is fixed with two first shifting pieces (211), the two first shifting pieces (211) are symmetrically arranged with the center line of the first rotating shaft (21), the first base (2) is slidably connected with a first sliding piece (5), the first sliding piece (5) is lower than the first rotating shaft (21), one end of the first sliding piece (5) is connected with a first clamping seat (6), the other end of the first sliding piece (5) is fixed with a first spring (11), one end of the first spring (11) away from the first sliding piece (5) is installed and fixed on the first base (2), and the first sliding piece (5) is provided with a first stop block (53) for contacting and shifting the first shifting piece (211); the second rotating shaft (31) is fixed with two second shifting pieces (311), the two second shifting pieces (311) are symmetrically arranged with the center line of the second rotating shaft (31), the second base (3) is slidably connected with a second sliding piece (7), the second sliding piece (7) is lower than the second rotating shaft (31), one end of the second sliding piece (7) is connected with a second clamping seat (8), the other end of the second sliding piece (7) is fixed with a second spring (12), one end of the second spring (12) away from the second sliding piece (7) is installed and fixed on the second base (3), and the second sliding piece (7) is provided with a second stop block (73) for contacting and shifting the second shifting piece (311).

6. A tip-up book mechanism according to claim 5, wherein: The first sliding piece (5) comprises a first sliding block (51), a first connecting rod (52) fixed on the first sliding block (51), the first sliding block (51) is slidingly connected on the first base (2), a first through hole (232) is formed on the first limiting stop (23), the first connecting rod (52) is fixed with the first clamping seat (6) after penetrating through the first through hole (232); the second sliding piece (7) comprises a second sliding block (71), a second connecting rod (72) fixed on the second sliding block (71), the second sliding block (71) is slidingly connected on the second base (3), a second through hole is formed on the second limiting stop (33), the second connecting rod (72) is fixed with the second clamping seat (8) after penetrating through the second through hole.

7. A tip-up book mechanism according to claim 6, wherein: The first limiting stop (23) is provided with a first groove (231), and one side of the first clamping seat (6) is embedded in the first groove (231); the second limiting stop (33) is provided with a second groove, and one side of the second clamping seat (8) is embedded in the second groove.

8. A tip-up book mechanism according to claim 7, wherein: The rack (1) is provided with a detection device for detecting the number of books between the first clamping seat (6) and the second clamping seat (8).

9. A tip-up book stacker mechanism according to claim 1, wherein: The first base (2) is provided with a first sliding seat (26) at the bottom, the second base (3) is provided with a second sliding seat (36) at the bottom, the rack (1) is fixed with a sliding rail, and the first sliding seat (26) and the second sliding seat (36) are slidingly connected on the sliding rail.

10. A tip-up book mechanism according to claim 9, wherein: The power device (4) includes a first transmission shaft (41) rotatably connected to the frame (1), a second transmission shaft (42) rotatably connected to the frame (1), and a motor (45) driving the first transmission shaft (41) to rotate, wherein a shaft coupling (43) is installed between the first transmission shaft (41) and the second transmission shaft (42), the first base (2) is rotatably connected with a first movable bevel gear (29) and a first intermediate transmission shaft (28), the first intermediate transmission shaft (28) is installed with a first transmission bevel gear (281), the first movable bevel gear (29) is engaged with the first transmission gear, the first movable bevel gear (29) is sleeved on the first transmission shaft (41), the outer wall of the first transmission shaft (41) is provided with a first sliding key (411) in the axial direction, a first key groove is formed in the hole of the first movable bevel gear (29), and the first sliding key (411) is embedded in the first key groove, the first intermediate transmission shaft (28) is fixed with a first synchronous wheel, the first rotating shaft (21) is fixed with a second synchronous wheel, a first synchronous belt (282) is installed between the first synchronous wheel and the second synchronous wheel, and the first base (2) is further provided with a first sensor (27) for detecting the rotation of the first rotating shaft (21); the second base (3) is rotatably connected with a second movable bevel gear (39) and a second intermediate transmission shaft (38), the second intermediate transmission shaft (38) is installed with a second transmission bevel gear (381), the second movable bevel gear (39) is engaged with the second transmission gear, the second movable bevel gear (39) is sleeved on the second transmission shaft (42), the outer wall of the second transmission shaft (42) is provided with a second sliding key (421) in the axial direction, a second key groove is formed in the hole of the second movable bevel gear (39), and the second sliding key (421) is embedded in the second key groove, the second intermediate transmission shaft (38) is fixed with a third synchronous wheel, the second rotating shaft (31) is fixed with a fourth synchronous wheel, a second synchronous belt (382) is installed between the third synchronous wheel and the fourth synchronous wheel, and the second base (3) is further provided with a second sensor (37) for detecting the rotation of the second rotating shaft (31).

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