Electric drive mechanism and bookbinding machine

Abstract

This utility model discloses an electric drive mechanism and a perfect binding machine. The electric drive mechanism includes a traction member for pulling the cover clamping mechanism, a traction wheel for driving the traction member, a lifting assembly for driving the inner page clamping mechanism to rise, a drive plate for driving the lifting assembly, a transmission shaft for driving the top plate and the traction wheel, a transmission gear for driving the transmission shaft, an output gear for driving the transmission gear, an electric drive device for driving the transmission gear, and a base for mounting the electric drive device, the lifting assembly, and the transmission shaft. The transmission shaft is rotatably mounted on the base. The traction wheel and the transmission gear are both mounted on the transmission shaft. The output gear is mounted on the output shaft of the electric drive device and meshes with the transmission gear. One end of the traction member is fixed to the traction wheel, and the other end of the traction member is connected to the cover clamping mechanism. This utility model's electric drive mechanism and perfect binding machine can fix the inner pages and the cover to the inner pages without manual operation.

Description

Technical Field

[0001] This utility model relates to the field of desktop binding technology, and in particular to an electric drive mechanism and a binding machine. Background Technology

[0002] Currently, desktop binding is usually done manually, by manually flipping the inner pages to apply glue, or by manually lifting the inner page clamping mechanism to apply glue. After gluing, the cover clamping mechanism is manually operated to clamp the cover to the glued inner pages to complete the binding. This process is complicated, time-consuming, and labor-intensive. After multiple bindings, the binding may become weak, resulting in the cover and inner pages not being tightly bound. Books or books may come apart after long-term use. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an electric drive mechanism for an electric selective drive lifting inner page clamping mechanism and a cover clamping mechanism, as well as a perfect binding machine.

[0004] To address the aforementioned problems, this utility model provides an electric drive mechanism and a perfect binding machine. The electric drive mechanism and the perfect binding machine are used to selectively drive an inner clamping mechanism and a cover clamping mechanism. The electric drive mechanism includes a traction member for clamping the cover clamping mechanism, a traction wheel for driving the traction member, a lifting assembly for driving the inner page clamping mechanism upwards, a drive plate for driving the lifting assembly, a transmission shaft for driving the top plate and the traction wheel, a transmission gear for driving the transmission shaft, an output gear for driving the transmission gear, an electric drive device for driving the transmission gear, and a device for mounting an electric drive mechanism. The device includes a base for a drive unit, a lifting assembly, and a drive shaft. The drive shaft is rotatably mounted on the base. The traction wheel and the transmission gear are both mounted on the drive shaft. The output gear is mounted on the output shaft of the electric drive unit and meshes with the transmission gear. One end of the traction member is fixed to the traction wheel, and the other end of the traction member is connected to the cover clamping mechanism. When the drive shaft rotates in a first direction, the drive plate drives the lifting assembly to lift the inner page clamping mechanism. When the drive shaft rotates in a second direction, the traction wheel pulls the traction member to drive the cover clamping mechanism to clamp.

[0005] Furthermore, a mounting bracket is provided on the base, and the electric drive device is mounted on the mounting bracket.

[0006] Furthermore, the diameter of the output gear is smaller than the diameter of the transmission gear.

[0007] Furthermore, the lifting assembly includes a top plate for driving the inner page clamping mechanism to rise and a linkage part for driving the drive plate to rotate. The top plate is rotatably mounted on the base, and the linkage part is driven by the drive plate.

[0008] Furthermore, the drive plate has a drive arm, which is located below the linkage part, and the linkage part is located within the rotation range of the drive arm.

[0009] Furthermore, the top plate is recessed downwards in the middle.

[0010] To solve the above problems, this utility model also provides a perfect binding machine, which includes an inner page clamping mechanism for clamping inner pages, a gluing mechanism for applying glue to the inner pages on the inner page clamping mechanism, a cover clamping mechanism for clamping the cover with the glued inner pages, and an electric drive mechanism as described in any of the preceding items. The inner page clamping mechanism, the gluing mechanism, and the cover clamping mechanism are all mounted on the machine base.

[0011] Furthermore, the cover clamping mechanism includes two mutually cooperating cover clamping plates, a connecting seat for connecting the cover clamping plates and the traction member, and a reset spring for resetting the connecting seat. The two ends of the reset spring are respectively connected to the connecting seat and the machine base. One end of the traction member is fixed to the drive plate, and the other end of the traction member passes through the connecting seat of one of the cover clamping plates and is fixed to the connecting seat of the other cover clamping plate.

[0012] Furthermore, each of the outer walls on both sides of the connecting seat is provided with a hanging post, one end of the return spring is hung on the hanging post, and the other end of the return spring is hung on the hanging hole of the base.

[0013] Furthermore, the inner page clamping mechanism includes a movable inner page clamping plate, a fixed inner page clamping plate, a transmission screw, a mounting plate, a guide rod, an inner page clamping driver, and support columns. Support columns are installed at both ends of the fixed inner page clamping plate, and the support columns are movably inserted into the base. The support columns are driven by a top plate. The guide rod is installed on the fixed inner page clamping plate, and guide rods are provided at both ends of the fixed inner page clamping plate. The movable inner page clamping plate is slidably disposed on the guide rod, and the mounting plate is installed on the guide rod. The movable inner page clamping plate is located between the fixed inner page clamping plate and the mounting plate. The inner page clamping driver is installed on the movable inner page clamping plate, and the transmission screw is screwed onto the mounting plate. The transmission screw is connected to the inner page clamping driver.

[0014] This utility model relates to an electric drive mechanism and a perfect binding machine. An output gear is driven by an electric drive device, which in turn drives a transmission gear to rotate, and the transmission gear drives a drive shaft to rotate. When the drive shaft rotates in a first direction, a drive plate mounted on the drive shaft drives a top plate, which lifts the inner page clamping mechanism. When the drive shaft rotates in a second direction, the drive plate on the drive shaft pulls a traction component, which drives a cover clamping mechanism to clamp the inner pages and the cover. The lifting of the inner page clamping mechanism and the clamping of the cover clamping mechanism can be completed simply by operating the electric drive device; no manual operation is required. Operation is simple and convenient. The use of an electric drive device prevents power loss and ensures the quality of the perfect binding. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of a preferred embodiment of the binding machine of this utility model.

[0016] Figure 2 This is a cross-sectional view of the perfect binding machine of this utility model.

[0017] Figure 3 This is a structural diagram of the connecting seat and the cover plate.

[0018] Figure 4 This is a schematic diagram of the electric drive mechanism.

[0019] Figure 5 This is a structural diagram of the lifting assembly and the drive board.

[0020] Figure 6 This is a schematic diagram of the lifting component's mechanism for holding the inner pages in place.

[0021] The meanings of the labels in the attached diagram are as follows:

[0022] Inner page clamping mechanism 1, movable inner page clamping plate 11, blocking part 111, fixed inner page clamping plate 12, transmission screw 13, mounting plate 14, guide rod 15, inner page clamping driver 16, support column 17, extension part 171, guide sleeve 18, cover clamping mechanism 2, cover clamping plate 21, weight reduction hole 211, connecting seat 22, return spring 23, hanging column 24, base 30, bearing platform 301, electric drive device 31, output gear 311, drive shaft 32, transmission gear 33, traction wheel 34, traction component 35, reversing wheel 36, drive plate 37, drive arm 371, self-locking step 3711, lifting assembly 38, top plate 381, linkage part 382, ​​gluing mechanism 4. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] like Figure 1As shown, a preferred embodiment of this utility model perfect binding machine includes an inner page clamping mechanism 1, a gluing mechanism 4, a cover clamping mechanism 2, and an electric drive mechanism. The electric drive mechanism has a base 30, on which the inner page clamping mechanism 1, the gluing mechanism 4, the cover clamping mechanism 2, and the electric drive mechanism are all mounted. The inner page clamping mechanism 1 is used to clamp the inner pages; the gluing mechanism 4 is used to apply glue to the inner pages clamped by the inner page clamping mechanism 1; the cover clamping mechanism 2 is used to clamp the cover and the glued inner pages to complete the perfect binding; the electric drive mechanism selectively drives the inner page clamping mechanism 1 to rise and the cover clamping mechanism 2 to clamp. When the electric drive mechanism drives the inner page clamping mechanism 1, it drives the inner page clamping mechanism 1 to rise, at which point the gluing mechanism 4 can apply glue to the inner pages clamped by the inner page clamping mechanism 1; after gluing is completed, the electric drive mechanism resets, and the inner page clamping mechanism 1 also resets synchronously. When the electric drive mechanism drives the cover clamping mechanism 2, the cover clamping device clamps the cover and the glued inner pages located therein. After clamping is completed, the electric drive mechanism resets, and the cover clamping device also resets synchronously.

[0025] like Figure 2As shown, the inner page clamping mechanism 1 includes a movable inner page clamping plate 11, a fixed inner page clamping plate 12, a transmission screw 13, a mounting plate 14, a guide rod 15, an inner page clamping driver 16, and support columns 17. Support columns 17 are installed at both ends of the fixed inner page clamping plate 12, and the support columns 17 are movably inserted into the base 30. The support columns 17 are used to link with the electric drive mechanism. The guide rod 15 is installed on the fixed inner page clamping plate 12, and guide rods 15 are provided at both ends of the fixed inner page clamping plate 12. The movable inner page clamping plate 11 is slidably disposed on the guide rod 15, and the movable inner page clamping plate 11 can move along the guide rod 15. The mounting plate 14 is installed on the guide rod 15, and the movable inner page clamping plate 11 is located between the fixed inner page clamping plate 12 and the mounting plate 14. The inner page clamping driver 16 is mounted on the movable inner page clamping plate 11. The transmission screw 13 is screwed onto the mounting plate 14 and connected to the inner page clamping driver 16. The inner page clamping driver 16 drives the transmission screw 13 to rotate, thereby pushing the movable inner page clamping plate 11 to move in the opposite direction. To ensure a more stable installation of the transmission screw 13, a guide sleeve 18 is provided on the mounting plate 14, and the transmission screw 13 is screwed into the guide sleeve 18. To prevent the inner page clamping driver 16 from being exposed, the movable inner page clamping plate 11 is bent away from the fixed inner page clamping plate 12 to form a shielding part 111. The shielding part 111 and the movable inner page clamping plate 11 form an installation space, and the inner page clamping driver 16 is located in the installation space. The shielding part 111 covers the inner page clamping driver 16, which can reduce dust entering the inner page clamping driver 16. The inner page clamping driver 16 is a motor. When it is necessary to clamp the inner pages, the inner page clamping driver 16 drives the transmission screw 13 to rotate. As the transmission screw 13 rotates, it moves towards the fixed inner page clamping plate 12, thereby driving the movable inner page clamping plate 11 to move towards the fixed inner page clamping plate 12, ultimately clamping the inner pages. When it is necessary to release the inner pages, the inner page clamping driver 16 simply drives the transmission screw 13 in the opposite direction.

[0026] The cover clamping mechanism 2 includes a cover clamping plate 21, a connecting seat 22, and a return spring 23 for resetting the connecting seat 22. There are two cover clamping plates 21 arranged side-by-side. The two cover clamping plates 21 move towards each other to clamp the cover and the glued inner pages, thus completing the glue binding of the cover and inner pages. Each cover clamping plate 21 is equipped with two connecting seats 22 at both ends. The base 30 has a support platform 301 with a sliding groove. The connecting seats 22 are located within the sliding groove, allowing the cover clamping plate 21 to slide on the support platform 301. The width of the connecting seat 22 is the same as the width of the sliding groove, ensuring that the connecting seat 22 does not wobble when sliding within the sliding groove, thus allowing the connecting seat 22 to move smoothly within the sliding groove. The connecting seat 22 is used to connect to an electric drive mechanism, which simultaneously drives the two cover clamping plates 21 to move towards each other on the support platform 301. One end of the return spring 23 is connected to the connecting seat 22, and the other end of the return spring 23 is connected to the base 30. The return spring 23 is used to reset the connecting seat 22. When the connecting seat 22 is driven to move in opposite directions by the electric drive mechanism, the return spring 23 is stretched and stores force. When the electric drive mechanism resets, the connecting seat 22 is reset under the action of the return spring 23. Each connecting seat 22 is connected to a return spring 23 on both sides, which can ensure that the connecting seat 22 can slide smoothly and steadily.

[0027] The cover clamp 21 is provided with weight reduction holes 211, which are used to reduce the weight of the cover clamp 21. There are two weight reduction holes 211, which extend along the length of the cover clamp 21. Arranging the weight reduction holes 211 along the length can reduce the number of times the weight reduction holes 211 need to be processed.

[0028] like Figure 3 As shown, both sides of the outer wall of the connecting seat 22 are provided with hanging posts 24. One end of the return spring 23 is hung on the hanging post 24, and the other end of the return spring 23 is hung on the hanging hole of the base 30. Connecting the return spring 23 to the outer wall of the connecting seat 22 can better install the return spring 23.

[0029] like Figures 4 to 6As shown, the electric drive mechanism includes an electric drive device 31, a drive shaft 32, an output gear 311, a transmission gear 33, a traction wheel 34, a traction component 35, a reversing wheel 36, a drive plate 37, and a lifting assembly 38. The electric drive device 31 is mounted on a base 30. A mounting bracket is provided on the base 30 for easy mounting, and the electric drive device 31 is mounted on the mounting bracket. The electric drive device 31 is a motor. The drive shaft 32 is rotatably mounted on the base 30. The transmission gear 33 is mounted on the drive shaft 32, and the drive shaft and transmission gear 33 rotate synchronously. The output gear 311 is mounted on the output shaft of the electric drive device 31, and the output gear 311 meshes with the transmission gear 33. The transmission gear 33 drives the drive shaft 32 to rotate, and the output gear 311 transmits the power of the electric drive device 31 to the transmission gear 33. The traction wheel 34 and the drive plate 37 are both mounted on the drive shaft 32. There are two drive plates 37, located at both ends of the drive shaft 32. The drive shaft 32 is used to drive the drive plates 37 and the traction wheel 34 to rotate. There are two lifting components 38, each corresponding to one drive plate 37. The two lifting components 38 are mounted on the base 30. The two lifting components 38 are used to lift the two support columns 17 of the inner page clamping mechanism 1, ensuring that both ends of the inner page clamping mechanism 1 rise and fall simultaneously, making the rise and fall of the inner page clamping mechanism 1 more stable and smooth. The reversing wheel 36 is rotatably mounted on the connecting seat 22 on one of the cover clamps 21. For ease of distinction and description, the connecting seat 22 with the reversing wheel 36 is defined as the first connecting seat 22, and the connecting seat 22 without the reversing wheel 36 is defined as the second connecting seat 22. It should be understood that only the same type of connecting seat 22 is installed on the same cover clamp 21. That is, when the first connecting seat 22 is installed on the cover clamp 21, the second connecting seat 22 will not be installed, and vice versa. One end of the traction member 35 is fixed to the traction wheel 34, and the other end of the traction member 35 passes around the reversing wheel 36 and is fixed to the other cover clamp 21, that is, the other end of the traction member 35 is fixed to the second connecting seat 22. The traction wheel 34 is located between the two cover clamps 21, which ensures that when the traction wheel 34 pulls the traction member 35, the first connecting seat 22 can also move towards the second connecting seat 22, and the second connecting seat 22 can also move towards the first connecting seat 22. When the cover clamping mechanism 2 needs to be driven, the electric drive device 31 drives the output gear 311 to rotate in the first direction, that is... Figure 5When the inner page clamping mechanism 1 rotates counterclockwise, the output gear 311 drives the transmission gear 33 to rotate, which in turn drives the transmission shaft to rotate. The transmission shaft then drives the drive plate 37 to rotate in the first direction. The drive plate 37 drives the linkage part 382, ​​which in turn drives the top plate 381 to lift the support column 17, thus lifting the entire inner page clamping mechanism 1. When it is necessary to drive the inner page clamping mechanism 1 to rise or fall, the electric drive device 31 drives the output gear 311 to rotate in the second direction, i.e. Figure 2 When the traction wheel 34 rotates clockwise, it pulls the traction component 35, which in turn pulls the two cover clamps 21 to clamp the cover and inner pages.

[0030] The diameter of the output gear 311 is smaller than that of the transmission gear 33, which can achieve the effect of deceleration while increasing torque, and can better drive the lifting assembly 38 and the cover clamping mechanism 2.

[0031] The mounting bracket is U-shaped when viewed from above. Both sides of the mounting bracket are fixed to the base 30, and the electric drive device 31 is installed in the middle of the mounting bracket.

[0032] The traction component 35 is a chain, the traction wheel 34 is a sprocket or a component with sprocket teeth, and the reversing wheel 36 is a sprocket. This can prevent slippage and prevent the traction component 35 from falling off the traction wheel 34.

[0033] The lifting assembly 38 includes a top plate 381 and a linkage part 382. The top plate 381 is rotatably mounted on the base 30, and the linkage part 382 is mounted on the top plate 381. The drive plate 37 drives the linkage part 382, ​​which in turn drives the top plate 381. The top plate 381 lifts the support column 17 on the inner page clamping mechanism 1. The linkage part 382 is a rod fixed to the top plate 381 and screwed onto it to reduce costs. The top plate 381 is plate-shaped for easy processing. The top plate 381 is concave in the middle, causing it to bend so that the concave portion can avoid the drive shaft 32, ensuring that the top plate 381 does not interfere with the drive shaft 32 when rotating.

[0034] The drive plate 37 is plate-shaped for ease of processing. The drive plate 37 has a drive arm 371 located below the linkage part 382, ​​which is within the rotation range of the drive arm 371. Thus, rotation of the drive plate 37 drives the linkage part 382. Initially, when the drive plate 37 rotates in the second direction, the drive arm 371 does not drive the linkage part 382, ​​i.e., it does not drive the top plate 381, thereby ensuring that the inner page clamping mechanism is not lifted when the drive shaft 32 drives the cover clamping mechanism. A self-locking step 3711 is provided at the end of the drive arm 371, located at the end of the drive plate 37 away from the drive shaft 32. The self-locking step 3711 positions the linkage part 382, ​​limiting its movement on the drive arm 371. The linkage part 382 slides from the end of the drive arm 371 near the drive shaft 32 to the end away from the drive shaft 32, eventually falling into the self-locking step 3711. When the linkage part 382 is located on the self-locking step 3711, the linkage part 382 abuts against the self-locking step 3711. At the same time, the linkage part 382 restricts the drive plate 37 from resetting, so that the drive shaft 32 can maintain balance even without external force, that is, keep the inner page clamping mechanism 1 in the glue application position. When it is necessary to release the balance, the drive plate 37 rotates in the opposite direction to disengage the linkage part 382 from the self-locking step 3711. At this time, the linkage part 382 slides along the end of the drive arm 371 away from the drive shaft 32 towards the end closer to the drive shaft 32, and the top plate 381 also resets and rotates. The self-locking step 3711 has a first limiting surface and a second limiting surface. The first limiting surface smoothly transitions to the upper end surface of the drive arm 371, which facilitates smoother sliding of the linkage part 382 when it moves from the first limiting surface to the upper end surface of the drive arm 371.

[0035] In use, the inner pages are first clamped and fixed, that is, held between the movable inner page clamping plate 11 and the fixed inner page clamping plate 12. The inner page clamping driver 16 drives the transmission screw 13 to rotate. The rotation of the transmission screw 13 causes the movable inner page clamping plate 11 to move towards the fixed inner page clamping plate 12, and finally clamps the inner page between the movable inner page clamping plate 11 and the fixed inner page clamping plate 12. Then, the electric drive device 31 drives the output gear 311 to rotate in the first direction. The output gear 311 drives the transmission gear 33 to rotate. The transmission gear 33 drives the transmission shaft to rotate. The transmission shaft drives the drive plate 37 to rotate in the first direction. The drive plate 37 drives the linkage part 382, ​​which in turn drives the top plate 381 to lift the support column 17, thus lifting the entire inner page clamping mechanism 1. Then, the glue is applied using a gluing mechanism. After gluing, the cover is placed on the support platform 301 between the two cover clamps 21. The electric drive device 31 is then rotated in the second direction. The output gear 311 drives the transmission gear 33 to rotate, which in turn drives the transmission shaft to rotate. The transmission shaft causes the drive plate 37 to reset, and the top plate 381 resets under gravity. The inner page clamping mechanism 1 also falls down, and the glued inner pages fall onto the cover along with the inner page clamping mechanism 1. The electric drive device 31 continues to drive the transmission shaft to rotate, which in turn drives the traction wheel 34 to rotate in the second direction. The traction wheel 34 pulls the traction member 35, which in turn pulls the two cover clamps 21 to clamp the cover and inner pages, completing the binding. After binding, the electric drive device 31 resets, rotating back to its initial position in the first direction. The two cover clamps 21 reset under the action of the reset spring 23 for easy reuse next time.

[0036] The entire perfect binding process is driven by electric equipment, eliminating the need for manual operation. It is simple and convenient to operate, and the use of electric equipment ensures that there will be no power shortage, thus guaranteeing the quality of the perfect binding.

[0037] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structure made using the contents of this utility model specification and drawings, whether directly or indirectly applied to other related technical fields, shall also be within the patent protection scope of this utility model.

Claims

1. An electric drive mechanism, characterized in that: For selectively driving an inner clamping mechanism and a cover clamping mechanism, the electric drive mechanism includes a traction member for pulling the cover clamping mechanism to clamp, a traction wheel for driving the traction member, a lifting assembly for driving the inner page clamping mechanism to rise, a drive plate for driving the lifting assembly, a transmission shaft for driving the top plate and the traction wheel, a transmission gear for driving the transmission shaft, an output gear for driving the transmission gear, an electric drive device for driving the transmission gear, and a base for mounting the electric drive device, the lifting assembly, and the transmission shaft. The transmission shaft is rotatably mounted on the base. The traction wheel and the transmission gear are both mounted on the transmission shaft. The output gear is mounted on the output shaft of the electric drive device and meshes with the transmission gear. One end of the traction member is fixed to the traction wheel, and the other end of the traction member is connected to the cover clamping mechanism. When the transmission shaft rotates in a first direction, the drive plate drives the lifting assembly to lift the inner page clamping mechanism. When the transmission shaft rotates in a second direction, the traction wheel pulls the traction member to drive the cover clamping mechanism to clamp.

2. The electric drive mechanism as described in claim 1, characterized in that: The base is provided with a mounting bracket, and the electric drive device is mounted on the mounting bracket.

3. The electric drive mechanism as described in claim 1, characterized in that: The diameter of the output gear is smaller than the diameter of the transmission gear.

4. The electric drive mechanism as described in claim 1, characterized in that: The lifting assembly includes a top plate for driving the inner page clamping mechanism to rise and a linkage part for driving the drive plate to rotate. The top plate is rotatably mounted on the base, and the linkage part is driven by the drive plate.

5. The electric drive mechanism as described in claim 4, characterized in that: The drive plate has a drive arm, which is located below the linkage part, and the linkage part is located within the rotation range of the drive arm.

6. The electric drive mechanism as described in claim 4, characterized in that: The top plate is recessed downwards in the middle.

7. A perfect binding machine, characterized in that: The device includes an inner page clamping mechanism for clamping inner pages, a gluing mechanism for applying glue to the inner pages on the inner page clamping mechanism, a cover clamping mechanism for clamping the cover and the glued inner pages, and an electric drive mechanism as described in any one of claims 1-6, wherein the inner page clamping mechanism, the gluing mechanism, and the cover clamping mechanism are all mounted on a base.

8. The perfect binding machine as described in claim 7, characterized in that: The cover clamping mechanism includes two mutually cooperating cover clamps, a connecting seat for connecting the cover clamps and the traction member, and a reset spring for resetting the connecting seat. The two ends of the reset spring are respectively connected to the connecting seat and the base. One end of the traction member is fixed to the drive plate, and the other end of the traction member passes through the connecting seat of one of the cover clamps and is fixed to the connecting seat of the other cover clamp.

9. The perfect binding machine as described in claim 8, characterized in that: The outer walls on both sides of the connecting seat are provided with hanging posts. One end of the return spring is hung on the hanging post, and the other end of the return spring is hung on the hanging hole of the base.

10. The perfect binding machine as described in claim 7, characterized in that: The inner page clamping mechanism includes a movable inner page clamping plate and a fixed inner page clamping plate for mutual clamping, a support column for supporting the fixed inner page clamping plate, a guide rod for guiding the movable inner page clamping plate, a transmission screw for driving the movable inner page clamping plate to move, a mounting plate for mounting the transmission screw, and an inner page clamping driver for driving the transmission screw to rotate. Support columns are installed at both ends of the fixed inner page clamping plate, and the support columns are movably inserted into the base and driven by a top plate. The guide rod is installed on the fixed inner page clamping plate, and guide rods are provided at both ends of the fixed inner page clamping plate. The movable inner page clamping plate is slidably disposed on the guide rod, and the mounting plate is installed on the guide rod. The movable inner page clamping plate is located between the fixed inner page clamping plate and the mounting plate. The inner page clamping driver is installed on the movable inner page clamping plate, and the transmission screw is screwed onto the mounting plate and connected to the inner page clamping driver.

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