A three-side trimming machine

Abstract

The application provides a three-side book cutting machine, which comprises an incoming book conveying mechanism, a book stacking and separating mechanism, a side cutter adjusting mechanism and an anti-explosion cutter adjusting mechanism; the incoming book conveying mechanism is used for conveying books; the book stacking and separating mechanism is used for stacking books into a book stack and separating books with a predetermined thickness at the bottom to a cutting station; the side cutter adjusting mechanism is used for locking or releasing the side cutter frame through a hoop locking assembly and driving the side cutter frame to move along the main shaft through a first driving assembly to adjust the side cutter spacing; the anti-explosion cutter adjusting mechanism is used for coarse adjustment and then fine adjustment through the cooperation of a double hoop and an adjusting screw rod to ensure the alignment accuracy of the anti-explosion cutter and the side cutter. The application realizes stable book supply through the incoming book conveying mechanism, realizes accurate book separation through the book stacking and separating mechanism, and realizes independent and accurate adjustment of the side cutter adjusting mechanism and the anti-explosion cutter adjusting mechanism, so that the product model changing time is effectively shortened, and the cutting quality consistency and the production line operation efficiency are significantly improved.

Description

Technical Field

[0001] This invention relates to the field of bookbinding and processing technology, and in particular to a three-sided book trimmer. Background Technology

[0002] A three-sided book trimmer is a key piece of equipment in a printing and binding production line. It is used to cut the three sides of a book, excluding the binding side, into a uniform finished size. Its workflow typically includes: a book feeding conveyor transports individual books sequentially to a book stacking station, where a book straightening mechanism neatly stacks the books into a stack; a stacking and separating device separates the stacks according to a set thickness, and a book transfer mechanism moves them to the cutting station; subsequently, a side blade cuts the stacks (cutting along the length of the book), and a front blade cuts along the width of the book. The precision and coordination of each step determine the overall cutting quality and production efficiency of the equipment.

[0003] In actual production, in order to meet the needs of different orders, the production line needs to frequently change the book specifications (involving different sizes). This requires the equipment to be able to quickly and accurately adjust several key parameters: the side blades need to be repositioned to cut books of different lengths, and the position of the explosion-proof blades must also be adjusted synchronously with the position of the side blades to ensure that the pre-cut slits are precisely aligned with the cutting lines.

[0004] In existing technologies, the adjustment of the side blade spacing is usually done manually, which is inefficient and difficult to control in terms of precision. The explosion-proof blade is fixed to the main shaft by clamps, and the adjustment is done by manually pushing the clamps to slide along the main shaft. There is a lack of precise feed control, making it difficult to achieve accurate alignment with the side blades. Every time the book size is changed, it is not only time-consuming and inefficient, but the adjustment errors of each link also accumulate, ultimately restricting the changeover efficiency of the production line and the consistency of cutting quality. Summary of the Invention

[0005] This invention proposes a three-sided book trimmer, which solves the problems of low changeover efficiency and poor cutting quality of existing three-sided book trimmers.

[0006] The technical solution of this invention is implemented as follows:

[0007] This invention provides a three-sided book trimmer, comprising:

[0008] A book conveying mechanism is used to transport books along the conveying direction.

[0009] The book stacking and separating mechanism is located at the output end of the book conveying mechanism. It is used to stack the books output by the book conveying mechanism into a book stack and separate the books of a predetermined thickness at the bottom of the book stack to the cutting station.

[0010] The side blade adjustment mechanism is located at the cutting station and includes a first main shaft, a first clamp that is slidably mounted on the first main shaft, a side blade holder fixed to the bottom of the first clamp, a first drive assembly for driving the side blade holder to move axially along the first main shaft, and a clamp locking assembly for locking or loosening the first clamp.

[0011] An explosion-proof knife adjustment mechanism, located at the cutting station, includes a second spindle, a second clamp slidably mounted on the second spindle, an explosion-proof knife holder connected to the second clamp, and a third clamp slidably mounted on the second spindle and located on one side of the second clamp. Both the second and third clamps are equipped with locking screws. An adjusting screw is rotatably mounted on the third clamp. The adjusting screw is threaded into the second clamp and its axis is parallel to the second spindle. Rotating the adjusting screw drives the second clamp to move relative to the third clamp along the second spindle to adjust the lateral position of the explosion-proof knife holder.

[0012] Specifically, the clamp locking assembly includes:

[0013] The upper connecting block is fixedly connected to the upper part of the opening of the first clamp;

[0014] The lower connecting block is fixedly connected to the lower part of the opening of the first clamp;

[0015] The positioning pin is provided at both ends of the upper and lower connecting blocks, which are movably sleeved on the positioning pin. The positioning pin is provided with limiting members at both ends to limit the range of motion of the upper and lower connecting blocks.

[0016] A hydraulic chamber is formed between the upper connecting block and the lower connecting block;

[0017] The piston is slidably disposed within the hydraulic chamber, with its top abutting against the upper connecting block;

[0018] An oil interface, connected to the hydraulic chamber, is used to connect an external oil pump;

[0019] The elastic element is sleeved outside the positioning pin, and its two ends abut against the limiting element at the top of the positioning pin and the upper connecting block, respectively.

[0020] After the oil pump starts, the oil pressure in the hydraulic chamber pushes the piston upward to lift the upper connecting block, thus loosening the first clamp; after the oil pump stops, the elastic element pushes the upper connecting block downward to reset, thus locking the clamp.

[0021] Furthermore, a first slide block is provided between the upper connecting block and the lower connecting block, and the first slide block is sleeved outside the positioning pin; an annular cavity is opened on the top surface of the first slide block to form the hydraulic cavity, and the piston is slidably embedded in the hydraulic cavity through a sealing ring; the oil interface is provided on the side wall of the first slide block, and an oil passage connecting the oil interface and the hydraulic cavity is provided at the bottom of the first slide block.

[0022] Specifically, the first driving component includes:

[0023] The first lead screw is rotatably mounted on the frame, and the first lead screw has two sections of threads with opposite directions of rotation;

[0024] Two drive nuts are fixedly connected to two side tool holders respectively, and the two drive nuts are respectively engaged with two sections of thread on the first lead screw; when the first lead screw rotates, the two drive nuts drive the two side tool holders to move closer or further away from each other along the first main shaft axis, so as to adjust the distance between the two side tools.

[0025] Specifically, the second clamp is provided with a first slide rail, which is horizontally arranged and perpendicular to the second main shaft. A first slider is slidably connected to the first slide rail, and the explosion-proof knife holder is fixedly connected to the first slider. The second clamp is provided with a second lead screw arranged parallel to the first slide rail. The second lead screw is rotatably mounted on a support at the bottom of the second clamp through a bearing, and the second lead screw is connected to the first slider through a threaded pair.

[0026] A first drive shaft parallel to the second main shaft is rotatably mounted on the support. A first bevel gear is sleeved on the outside of the first drive shaft. The first bevel gear is circumferentially fixed and axially slidably connected to the first drive shaft. The first bevel gear is rotatably connected to the support at the bottom of the second clamp through a bearing. A second bevel gear meshing with the first bevel gear is fixedly connected to the end of the second lead screw. By driving the first drive shaft to rotate, the second lead screws on both sides are driven to rotate synchronously, driving the corresponding first slider to move along the first slide rail, so as to synchronously adjust the longitudinal position of the tool holders on both sides.

[0027] Specifically, the stacking mechanism includes:

[0028] A platform, used to support stacked books;

[0029] A front stop, a rear stop, and two side stops are respectively located on the front, rear, and left and right sides of the platform to limit the stack of books on the platform; the front stop is mounted on the frame via a first lifting assembly, which is used to adjust the gap between the bottom of the front stop and the platform.

[0030] A first guide rod is positioned below the rear guide rail along the direction of book stacking. A second slide block is slidably mounted on the first guide rod. A groove is formed on the top surface of the second slide block along the axial direction of the first guide rod. A second slider is slidably mounted in the groove. A third lead screw is rotatably mounted on the second slide block. The third lead screw is threadedly engaged with the second slider. Rotating the third lead screw drives the second slider to move back and forth along the groove.

[0031] The book pusher is mounted on the second slider via a second lifting assembly. The second lifting assembly is used to adjust the height of the book pusher protruding from the top surface of the platform. The height of the book pusher protruding from the top surface of the platform is equal to the distance between the bottom end of the front stop gauge and the platform.

[0032] The second drive assembly is used to drive the second slide to move back and forth along the first guide rod, so that the book pusher pushes the books of a predetermined thickness at the bottom of the book stack towards the front guide gauge and sends them out through the gap at the bottom of the front guide gauge.

[0033] Furthermore, the second lifting assembly includes:

[0034] The top rod passes through the second slide block and the second slider and is fixedly connected to the book pusher.

[0035] The set screw is installed on the side of the second slider, and its end abuts against the outer wall of the push rod;

[0036] The limiting plate is connected to the second slide block via a connecting plate and is located below the top rod;

[0037] The top block has its top surface abutting against the bottom of the top rod. The bottom of the top block is connected to a vertical second guide rod, which slides in conjunction with a sliding hole on the limiting plate.

[0038] The first compression spring is sleeved outside the second guide rod, with its two ends abutting against the top block and the limiting plate, respectively.

[0039] Specifically, the feed conveying mechanism includes:

[0040] Base;

[0041] The first conveying mechanism, mounted on the base, is used to convey books along the conveying direction;

[0042] The second conveying mechanism is mounted on the base and located at the output end of the first conveying mechanism. Its conveying direction is the same as that of the first conveying mechanism, and the conveying speed of the second conveying mechanism is greater than that of the first conveying mechanism.

[0043] The friction wheel is mounted above the second conveying mechanism via the second drive shaft, and a conveying channel for clamping books is formed between the friction wheel and the second conveying mechanism.

[0044] Furthermore, the second conveying mechanism includes:

[0045] A drive shaft is rotatably mounted on a machine base and is driven to rotate by a first motor. The outer circumference of the drive shaft is provided with several annular grooves.

[0046] The pulley is mounted on the machine base via a bracket and is located on the outside of the drive shaft;

[0047] A conveyor belt is fitted onto a drive shaft and pulleys, and the number of pulleys and the number of conveyor belts are the same as the number of annular grooves and their positions correspond one-to-one.

[0048] A drive pulley is fixed on the drive shaft, and a driven pulley and a tension pulley are rotatably mounted on the base. A transmission belt is wound around the drive pulley, the tension pulley, and the driven pulley. A synchronous pulley is fixed on the second transmission shaft, and the synchronous pulley is pressed against the outer surface of the transmission belt.

[0049] The base is equipped with a second motor and a vertical fourth lead screw. A third slider is fitted on the fourth lead screw. Connecting arms are provided on both sides of the third slider. The ends of the connecting arms are rotatably connected to the second transmission shaft through bearings. When the second motor drives the fourth lead screw to rotate, it drives the third slider to rise and fall, which in turn drives the second transmission shaft and friction wheel to rise and fall.

[0050] The connecting arm and the third slider are rotatably connected by a first pin, and the top of the outer peripheral surface of the first pin is provided with a ball socket; a top pin is slidably installed on the top surface of the third slider, and a ball head that mates with the ball socket is provided at the bottom of the top pin; a pressure block is provided above the third slider, and the pressure block is slidably sleeved on the top pin; a second compression spring is sleeved on the outside of the top pin, and the two ends of the second compression spring abut against the pressure block and the ball head respectively.

[0051] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0052] (1) This invention achieves continuous book supply by setting up a book feeding and conveying mechanism, stacking and separating books into piles and separating them according to a predetermined thickness, and independently adjusting the side blade and explosion-proof blade respectively, realizing the coordinated operation of the entire process from book feeding and separation to cutting; the stacking and separating mechanism can flexibly change the thickness of the stacked books in a single batch to adapt to the cutting needs of books of different thicknesses; the side blade adjusting mechanism achieves reliable locking through the clamp locking component, and accurately adjusts the side blade spacing in conjunction with the drive component; the explosion-proof blade adjusting mechanism can accurately adjust the lateral position of the explosion-proof blade holder through the cooperation of the third clamp and the adjusting screw, ensuring that the pre-cutting kerf of the explosion-proof blade is precisely aligned with the cutting line of the side blade. When the book specifications change, the above mechanisms complete their respective adjustment tasks, effectively shortening the product changeover time and improving the consistency of cutting quality.

[0053] (2) The clamp locking assembly of the present invention adopts the working mode of hydraulic unlocking and elastic element locking. By setting a hydraulic chamber and piston between the upper connecting block and the lower connecting block, and cooperating with the elastic element to provide pre-tightening force, the first clamp is always kept in a locked state under normal conditions. When adjusting the side blade distance, it is only necessary to start the oil pump for a short time to supply oil to loosen the clamp. After the adjustment is completed, the oil pump is turned off and the clamp can be automatically locked by the elastic force of the elastic element. It can maintain a reliable locking state without continuously consuming energy, avoiding the energy waste caused by continuous air supply in the traditional cylinder scheme and the problem of unstable locking caused by air pressure fluctuation. The locking is reliable and energy-saving.

[0054] (3) By setting a first slide rail and a lead screw on the second clamp, the present invention drives the slider to move in a direction perpendicular to the second main shaft, thereby achieving precise adjustment of the longitudinal position of the explosion-proof knife, so that the explosion-proof knife can adapt to the width of different books and move closer or further away from the spine; at the same time, through the cooperation of the drive shaft, the first bevel gear and the second bevel gear, the longitudinal extension and retraction adjustment of the explosion-proof knives on both sides is realized by a single drive shaft, ensuring that the explosion-proof knives on both sides always move synchronously and are symmetrical in position, avoiding the alignment deviation caused by inconsistent adjustment on both sides, and improving the adjustment efficiency and consistency.

[0055] (4) The present invention sets up a first lifting component to drive the front stop gauge to lift and lower to adjust the gap between its bottom end and the platform, and sets up a second lifting component to drive the pusher to lift and lower to adjust its height protruding from the top surface of the platform, and makes the height of the pusher consistent with the gap at the bottom end of the front stop gauge, thus realizing flexible adjustment of the book thickness; the operator can quickly change the thickness of the book split in one go by simply using the lifting component, without replacing the pusher or making temporary modifications, which significantly improves the adaptability and adjustment convenience of the production line to different specifications of books.

[0056] (5) By setting a second conveying mechanism with a faster conveying speed and a friction wheel above it, the book is accelerated and thrown out after transitioning from the first conveying mechanism, effectively avoiding the "head-down" phenomenon caused by the book's front end drooping due to its own weight. At the same time, the friction wheel and the second conveying mechanism clamp the book from top to bottom, ensuring that the book enters the sorting station in a stable posture. The friction wheel can be raised and lowered by the lead screw driven by the second motor, and the distance between the friction wheel and the second conveying mechanism can be precisely adjusted to adapt to books of different thicknesses. The first pin, top pin and compression spring structure set between the connecting arm and the slider makes the initial distance between the friction wheel and the second conveying mechanism slightly smaller than the thickness of the book. When the book enters, the friction wheel is lifted and pressed down by the spring force to achieve elastic clamping of the book, avoiding rigid clamping that could damage the book, ensuring reliable conveying without damaging the book. Attached Figure Description

[0057] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0058] Figure 1 This is a schematic diagram of the overall structural layout of a three-sided book cutter according to the present invention.

[0059] Figure 2 This is a schematic diagram of the side blade adjustment mechanism in an embodiment of the present invention.

[0060] Figure 3 This is a cross-sectional structural diagram of the clamp locking assembly in an embodiment of the present invention.

[0061] Figure 4 This is a schematic diagram of the external structure of the clamp locking assembly in an embodiment of the present invention.

[0062] Figure 5 This is a schematic diagram of the external structure of the explosion-proof knife adjustment mechanism in an embodiment of the present invention.

[0063] Figure 6 This is a partial structural schematic diagram of the explosion-proof knife adjustment mechanism in an embodiment of the present invention.

[0064] Figure 7 This is a schematic diagram of the external structure of the stacking mechanism in an embodiment of the present invention.

[0065] Figure 8 This is a partial side view of the stacking mechanism in an embodiment of the present invention.

[0066] Figure 9 This is a schematic diagram of the connection structure between the second lifting component and the book pushing component in an embodiment of the present invention.

[0067] Figure 10 This is a schematic diagram of the structure of the second driving component in an embodiment of the present invention.

[0068] Figure 11 This is a schematic diagram of the conveying mechanism in an embodiment of the present invention.

[0069] Figure 12 This is a schematic diagram of the structure of the second conveying mechanism in an embodiment of the present invention.

[0070] Figure 13 This is a schematic diagram of the transmission connection structure between the friction wheel and the second conveying mechanism in an embodiment of the present invention.

[0071] Figure 14 This is a schematic diagram of the connection structure between the second drive shaft and the third slider in an embodiment of the present invention.

[0072] Figure 15 This is a cross-sectional schematic diagram of the fit between the top pin and the first pin shaft in an embodiment of the present invention.

[0073] Figure 16 This is a schematic diagram of the mounting structure of the base on the frame in an embodiment of the present invention.

[0074] Figure 17 This is a schematic diagram of the structure of the third lifting component in an embodiment of the present invention.

[0075] In the picture:

[0076] 100. Incoming material conveying mechanism;

[0077] 101. First conveying mechanism; 102. Base; 103. Second conveying mechanism; 104. Friction wheel; 105. Second transmission shaft; 106. Drive shaft; 107. Pulley; 108. Conveyor belt; 109. Driving pulley; 110. Driven pulley; 111. Tensioner; 112. Transmission belt; 113. Synchronous pulley; 114. Second motor; 115. Fourth lead screw; 116. Third slider; 117. Connecting arm; 118. First pin; 119. Ball socket; 120. Top pin; 121. Ball head; 122. Pressure block; 123. Second compression spring; 124. Frame; 125. Third lifting assembly; 126. Fifth lead screw; 127. Fourth slider; 128. Slide bar; 129. Second slide rail;

[0078] 200. Stacking and distribution mechanism;

[0079] 201. Platform; 202. Front stop; 203. Rear stop; 204. Side stop; 205. First lifting assembly; 206. First guide rod; 207. Second slide block; 208. Slide groove; 209. Second slider; 210. Third lead screw; 211. Book pusher; 212. Second lifting assembly; 213. Top rod; 214. Set screw; 215. Limiting plate; 216. Top block; 217. Second guide rod; 218. First compression spring; 219. Push-pull arm; 220. Swing arm; 221. Cam; 222. Second pin; 223. Roller;

[0080] 300. Side blade adjustment mechanism;

[0081] 301. First spindle; 302. First clamp; 303. Side tool holder; 304. Upper connecting block; 305. Lower connecting block; 306. Positioning pin; 307. Limiting element; 308. Hydraulic chamber; 309. Piston; 310. Oil interface; 311. Elastic element; 312. First slide block; 313. Sealing ring; 314. Oil passage; 315. Guide slide rod; 316. First lead screw; 317. Transmission nut;

[0082] 400. Explosion-proof knife adjustment mechanism;

[0083] 401. Second spindle; 402. Second clamp; 403. Explosion-proof tool holder; 404. Third clamp; 405. Adjusting screw; 406. First slide rail; 407. First slider; 408. Second lead screw; 409. First drive shaft; 410. First bevel gear; 411. Second bevel gear. Detailed Implementation

[0084] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0085] Reference Figures 1 to 17 This invention provides a three-sided book trimmer, comprising:

[0086] The book conveying mechanism 100 is used to convey books along the conveying direction;

[0087] The stacking and separating mechanism 200 is located at the output end of the book conveying mechanism 100 and is used to stack the books output by the book conveying mechanism 100 into a book stack and separate the books of a predetermined thickness at the bottom of the book stack to the cutting station.

[0088] The side blade adjustment mechanism 300 is located at the cutting station, such as... Figure 2-4 As shown, it includes a first spindle 301, a first clamp 302 slidably mounted on the first spindle 301, a side tool holder 303 fixed to the bottom of the first clamp 302, a first drive assembly for driving the side tool holder 303 to move axially along the first spindle 301, and a clamp locking assembly for locking or releasing the first clamp 302; the clamp locking assembly includes:

[0089] The upper connecting block 304 is fixedly connected to the upper part of the opening of the first clamp 302;

[0090] The lower connecting block 305 is fixedly connected to the lower part of the opening of the first clamp 302;

[0091] The positioning pin 306 is provided, and the upper connecting block 304 and the lower connecting block 305 are movably sleeved on the positioning pin 306; the two ends of the positioning pin 306 are provided with limiting members 307 to limit the range of movement of the upper connecting block 304 and the lower connecting block 305.

[0092] Hydraulic chamber 308 is formed between upper connecting block 304 and lower connecting block 305;

[0093] Piston 309 is slidably disposed in the hydraulic chamber 308, and its top abuts against the upper connecting block 304;

[0094] The oil interface 310 is connected to the hydraulic chamber 308 and is used to connect an external oil pump.

[0095] The elastic element 311 is sleeved on the outside of the positioning pin 306, and its two ends abut against the limiting element 307 at the top of the positioning pin 306 and the upper connecting block 304, respectively.

[0096] After the oil pump starts, the oil pressure in the hydraulic chamber 308 pushes the piston 309 upward to lift the upper connecting block 304, causing the first clamp 302 to loosen; after the oil pump is turned off, the elastic element 311 pushes the upper connecting block 304 downward to reset, causing the clamp to lock.

[0097] The explosion-proof knife adjustment mechanism 400 is located at the cutting station, such as... Figure 5 , 6 As shown, the device includes a second spindle 401, a second clamp 402 slidably mounted on the second spindle 401, an explosion-proof tool holder 403 connected to the second clamp 402, and a third clamp 404 slidably mounted on the second spindle 401 and located on one side of the second clamp 402. Both the second clamp 402 and the third clamp 404 are provided with locking screws. An adjusting screw 405 is rotatably mounted on the third clamp 404. The adjusting screw 405 is threadedly engaged with the second clamp 402 and its axial direction is parallel to the second spindle 401. When the adjusting screw 405 is rotated, it drives the second clamp 402 to move relative to the third clamp 404 along the second spindle 401 to adjust the lateral position of the explosion-proof tool holder 403.

[0098] In this embodiment, the upper connecting block 304 and the lower connecting block 305 are respectively fixed on the upper and lower sides of the opening of the first clamp 302, and the two are guided and positioned by the positioning pin 306; the hydraulic chamber 308 is located between the two, and the piston 309 can slide up and down in the hydraulic chamber 308; the elastic element 311 is compressed between the upper limit element 307 and the upper connecting block 304, and always pushes the upper connecting block 304 downward, so that the first clamp 302 is in a normally closed and locked state. When it is necessary to loosen the first clamp 302, the external oil pump supplies oil to the hydraulic chamber 308 through the oil interface 310, and the oil pressure pushes the piston 309 upward. The piston 309 lifts the upper connecting block 304 and moves upward against the elastic force of the elastic element 311, and the opening of the first clamp 302 opens; after the oil pump is turned off and the pressure is released, the elastic force of the elastic element 311 presses the upper connecting block 304 down, and the first clamp 302 is locked again. This structure achieves a flexible locking and hydraulic unlocking working mode, consuming energy only briefly when the first clamp 302 needs to be loosened; no continuous power supply is required in the locked state, making it energy-efficient and reliable. The second clamp 402 is fixedly connected to the explosion-proof knife holder 403 to support the explosion-proof knife; the third clamp 404 serves as an adjustment base. The adjusting screw 405 is rotatably mounted on the outside of the third clamp 404 via a limiting component 307 (such as the cooperation of a shoulder and a U-shaped locking block), allowing the adjusting screw 405 to rotate freely relative to the third clamp 404 but preventing axial movement. The other end of the adjusting screw 405 passes through an adjusting block fixed to the outside of the second clamp 402, and the adjusting block has a threaded hole that engages with the adjusting screw 405. Rotating the adjusting screw 405 drives the adjusting block via the threaded pair, causing the second clamp 402 to move precisely relative to the third clamp 404 along the second main shaft 401, significantly improving the adjustment accuracy of the explosion-proof knife's lateral position and ensuring precise alignment between the pre-cutting kerf and the side cutting line of the explosion-proof knife.

[0099] Specifically, the elastic element 311 is a disc spring, and a sliding sleeve (not shown in the figure) is fitted around the locating pin 306, with the disc spring fitted around the sliding sleeve. The top of the sliding sleeve has an end ring (not shown in the figure), the bottom surface of which abuts against the top surface of the disc spring, and the top surface of which abuts against the bottom surface of the limiting member 307 at the top of the locating pin 306. Using a disc spring as the elastic element 311 has the advantages of large elastic force per unit deformation, short stroke, and long service life. The sliding sleeve is fitted around the locating pin 306, and the disc spring is fitted onto the sliding sleeve. The sliding sleeve can slide along the axial direction of the locating pin 306. The end ring at its top evenly transmits the pressure of the limiting member 307 to the disc spring, avoiding direct contact between the disc spring and the limiting member 307 and preventing uneven wear, while ensuring uniform force on the disc spring and improving locking stability.

[0100] Furthermore, the limiting member 307 includes two locking nuts, which are threadedly connected to the ends of the positioning pin 306. Using two locking nuts as the limiting member 307 allows adjustment of the pre-compression of the disc spring by changing the engagement position of the nuts on the positioning pin 306, thereby adjusting the locking force of the first clamp 302. The double-nut structure has an anti-loosening effect, preventing the limiting member 307 from loosening due to long-term vibration and ensuring a constant locking force.

[0101] Furthermore, such as Figure 3 , 4 As shown, a first slide block 312 is provided between the upper connecting block 304 and the lower connecting block 305, and the first slide block 312 is sleeved on the outside of the positioning pin 306; the top surface of the first slide block 312 has an annular cavity to form the hydraulic cavity 308, and the piston 309 is slidably embedded in the hydraulic cavity 308 through the sealing ring 313; the oil interface 310 is provided on the side wall of the first slide block 312, and the bottom of the first slide block 312 has an oil passage 314 connecting the oil interface 310 and the hydraulic cavity 308.

[0102] The first slide block 312 is installed as an independent component between the upper and lower connecting blocks 305. The annular cavity on its top surface cooperates with the piston 309 to form a hydraulic chamber 308, which is convenient for machining and sealing. The oil inlet 310 is located on the side wall of the first slide block 312 and communicates with the bottom of the hydraulic chamber 308 through the internal oil passage 314. When oil is supplied, the oil pushes the piston 309 upward from the bottom. The sealing ring 313 ensures the sealing of the hydraulic chamber 308 and prevents oil leakage from affecting the pressure build-up.

[0103] Specifically, such as Figure 4 As shown, a guide slide rod 315 is fixedly provided on the lower connecting block 305, and the top end of the guide slide rod 315 passes through the upper connecting block 304. The guide slide rod 315 is arranged parallel to the positioning pin 306, which further restricts the upper connecting block 304 to remain horizontal during the lifting and lowering process, and improves the repeatability of locking.

[0104] Specifically, such as Figure 2 As shown, the first driving component includes:

[0105] The first lead screw 316 is rotatably mounted on the frame 124, and the first lead screw 316 is provided with two sections of threads with opposite directions of rotation;

[0106] Two transmission nuts 317 are fixedly connected to two side tool holders 303 respectively, and the two transmission nuts 317 are respectively engaged with two sections of thread on the first lead screw 316; when the first lead screw 316 rotates, the two transmission nuts 317 drive the two side tool holders 303 to move closer or further away from each other along the axial direction of the first main shaft 301, so as to adjust the distance between the two side tools.

[0107] A double-stage reverse-threaded lead screw, in conjunction with two transmission nuts 317, drives two side blade holders 303 respectively, achieving synchronous movement towards or away from each other. This ensures that the two blade holders 303 remain symmetrical about the middle section of the first main shaft 301 during adjustment, which is beneficial for precise control of cutting dimensions. The side blade spacing can be quickly and accurately adjusted by rotating the first lead screw 316, making operation simple.

[0108] Preferably, the second spindle 401 is provided with a scale along the axial direction. The scale provides the operator with an intuitive displacement reference during the coarse adjustment stage, which makes it easy to quickly move the explosion-proof knife to the vicinity of the target position. During the fine adjustment stage, the operator can also observe the movement of the pointer or mark on the scale to precisely control the number of rotations of the adjusting screw 405, thereby achieving quantitative adjustment and further improving the accuracy and efficiency of fine adjustment.

[0109] Specifically, such as Figure 5 , 6 As shown, the second clamp 402 is provided with a first slide rail 406, which is horizontally arranged and perpendicular to the second main shaft 401. A first slider 407 is slidably connected to the first slide rail 406, and the explosion-proof knife holder 403 is fixedly connected to the first slider 407. The second clamp 402 is provided with a second lead screw 408 arranged parallel to the first slide rail 406. The second lead screw 408 is rotatably mounted on the support at the bottom of the second clamp 402 through a bearing, and the second lead screw 408 is connected to the first slider 407 through a threaded pair.

[0110] A first drive shaft 409, parallel to the second main shaft 401, is rotatably mounted on the support. A first bevel gear 410 is sleeved on the outside of the first drive shaft 409. The first bevel gear 410 is circumferentially fixed (e.g., connected by a spline) and axially slidably connected to the first drive shaft 409. The first bevel gear 410 is connected to the support at the bottom of the second clamp 402 via a bearing (the bearing is installed inside the support and sleeved on the hollow shaft of the first bevel gear 410, and the hollow shaft of the first bevel gear 410 extends axially outward to sleeve the shaft). The bearing rotatably connects the first bevel gear 410 to the second drive shaft 409, allowing it to rotate via the bearing and slide axially along the first drive shaft 409 together with the second clamp 402. The end of the second lead screw 408 is fixedly connected to a second bevel gear 411 that meshes with the first bevel gear 410. When the operator drives the first drive shaft 409 to rotate, the power is transmitted to the second lead screw 408 via the first bevel gear 410 and the second bevel gear 411, driving the first sliders 407 on both sides to move synchronously, thereby achieving synchronous adjustment of the longitudinal extension and retraction of the explosion-proof blades on both sides. When the second lead screw 408 rotates, the rotational motion of the second lead screw 408 is converted into the linear motion of the first slider 407 through the helical transmission of the threaded pair, driving the first slider 407 to slide along the first slide rail 406. The transmission of the second lead screw 408 has the advantages of precise feeding and self-locking, which can accurately control the longitudinal extension and retraction of the explosion-proof blade. This allows the explosion-proof blade to adaptively adjust the distance between the explosion-proof blade and the spine according to the width of different books, ensuring that the explosion-proof blade can always accurately fit against the spine surface during pre-cutting, providing precise positioning for subsequent pre-cutting groove operations. Moreover, once adjusted, it is not easily moved due to vibration, ensuring the stability of the explosion-proof blade's position during the pre-cutting operation. This structure ensures that the explosion-proof blades on both sides always move synchronously and are symmetrically positioned, avoiding alignment deviations caused by inconsistent adjustments on both sides, while simplifying the operation steps and improving adjustment efficiency.

[0111] Specifically, such as Figure 7-9 As shown, the stacking and distributing mechanism 200 includes:

[0112] Platform 201, used to support stacked books;

[0113] A front stop 202, a rear stop 203, and two side stopes 204 are respectively located on the front, rear, and left and right sides of the platform 201 to limit the stack of books on the platform 201. The front stop 202 is mounted on the frame 124 via a first lifting assembly 205 (which can be achieved by a lead screw, hydraulic cylinder, pneumatic cylinder, or electric cylinder). The first lifting assembly 205 is used to adjust the gap between the bottom of the front stop 202 and the platform 201.

[0114] A first guide rod 206 is positioned below the rear stop gauge 203 along the book stacking direction. A second slide block 207 is slidably mounted on the first guide rod 206. A groove 208 is formed on the top surface of the second slide block 207 along the axial direction of the first guide rod 206. A second slider 209 is slidably mounted in the groove 208. A third lead screw 210 is rotatably mounted on the second slide block 207. The third lead screw 210 is threadedly engaged with the second slider 209. Rotating the third lead screw 210 drives the second slider 209 to move back and forth along the groove 208.

[0115] The book pusher 211 is mounted on the second slider 209 via the second lifting component 212. The second lifting component 212 is used to adjust the height of the book pusher 211 protruding from the top surface of the platform 201. The height of the book pusher 211 protruding from the top surface of the platform 201 is equal to the distance between the bottom end of the front stop 202 and the platform 201.

[0116] The second drive assembly is used to drive the second slide 207 to move back and forth along the first guide rod 206, so that the book pusher 211 pushes the books of a predetermined thickness at the bottom of the book stack towards the front stop 202 and sends them out through the gap at the bottom of the front stop 202.

[0117] The platform 201 provides a flat bearing surface for the stack of books. The front stop 202, rear stop 203, and two side stop 204 limit the stack of books from four directions (front, rear, left, and right) to ensure that the stack of books is neatly stacked. The front stop 202 and rear stop 203 can be adjusted along the length of the stack of books (through sliding rods, screws, etc.), and the two side stop 204 can be adjusted along the width of the stack of books (through lead screws, hydraulic cylinders, pneumatic cylinders, electric cylinders, etc.) to accommodate books of different sizes. The front stop 202 can be raised and lowered vertically through the first lifting component 205 to change the gap height between its bottom end and the platform 201. This gap is the thickness of the book separation outlet. The first guide rod 206 is horizontally arranged along the book-separation direction, providing precise linear motion guidance for the second slide 207. The second slide 207 is slidably mounted on the first guide rod 206, serving as the moving carrier for the book pusher 211. The book pusher 211 is mounted on the second slide 207 via the second lifting assembly 212, and its height protruding from the top surface of the platform 201 can be independently adjusted. This height must be adjusted to match the gap at the bottom of the front stop 202 to ensure that the book pusher 211 only pushes out the bottom layer of books of the set thickness. The second drive assembly provides the power for reciprocating motion. This solution achieves precise adjustment of the book-separation thickness. The first lifting assembly 205 and the second lifting assembly 212 cooperate with each other. The thickness of the book separated in a single operation can be changed simply by adjusting the height of the front stop 202 and the height of the book pusher 211, without the need to replace the book pusher 211 or make temporary modifications, significantly improving the adaptability and ease of adjustment of the production line.

[0118] A groove 208 is formed on the top surface of the second slide block 207 and extends axially along the first guide rod 206. The second slider 209 is embedded in the groove 208 and can slide along the groove 208. The second lifting component 212 is installed on the second slider 209 and moves together with the second slider 209 (a clearance hole is provided in the middle of the second slide block 207 to avoid the second lifting component 212). The third lead screw 210 is rotatably installed on the second slide block 207 and threadedly engaged with the second slider 209. By rotating the third lead screw 210, the front and back position of the second slider 209 in the groove 208 can be precisely controlled. This structure makes the front and back position of the book pusher 211 adjustable in the book-separating direction. The operator can precisely adjust the initial push position of the book pusher 211 according to the book size requirements through the third lead screw 210 to ensure that the book pusher 211 can accurately contact the predetermined position of the bottom of the book stack with each movement, thereby improving the accuracy and consistency of book separation.

[0119] Furthermore, such as Figure 9 As shown, the second lifting assembly 212 includes:

[0120] The top of the push rod 213 passes through the second slide block 207 and the second slider 209 and is fixedly connected to the book pusher 211.

[0121] Set screw 214 is installed on the side of the second slider 209, and its end abuts against the outer wall of the push rod 213;

[0122] The limiting plate 215 is connected to the second slide block 207 via a connecting plate and is located below the top rod 213;

[0123] The top block 216 has its top surface abutting against the bottom of the top rod 213. The bottom of the top block 216 is connected to a vertical second guide rod 217, which slides in conjunction with a sliding hole on the limiting plate 215.

[0124] The first compression spring 218 is sleeved outside the second guide rod 217, and its two ends abut against the top block 216 and the limiting plate 215 respectively.

[0125] The top rod 213 is vertically positioned, with its top end passing through the second slide block 207 and the second slider 209 before being fixedly connected to the upper book pusher 211, providing vertical support for the book pusher 211. The set screw 214 is located on the side of the second slider 209. After the height of the book pusher 211 is adjusted to the correct position, the set screw 214 is tightened so that its end abuts against the outer wall of the top rod 213, locking the position of the top rod 213 and the book pusher 211 to prevent height changes due to vibration during operation. The limiting plate 215 is fixedly connected to the second slide block 207 via a connecting plate and is located below the top rod 213 as a spring seat; the top block 216 is located between the bottom of the top rod 213 and the first compression spring 218, with its top surface abutting against the bottom of the top rod 213 to transmit spring force; the second guide rod 217 is vertically fixed to the bottom of the top block 216 and slides in cooperation with the sliding hole on the limiting plate 215 to provide guidance for the lifting and lowering of the top block 216; the first compression spring 218 is sleeved on the outside of the second guide rod 217, with its two ends abutting against the top block 216 and the limiting plate 215 respectively, and always pushes the top block 216 upward, and the top block 216 then pushes the top rod 213 upward, so that the book pusher 211 maintains a stable upward trend. When it is necessary to raise the pusher 211, simply loosen the set screw 214, and the push rod 213 will automatically push up under the action of the spring force, and then tighten the set screw 214; when it is necessary to lower the pusher 211, manually press the pusher 211 down to the set height and then tighten the set screw 214.

[0126] Specifically, such as Figure 9 As shown, the book pusher 211 includes a top plate and two side plates. The top end of the top rod 213 is fixedly connected to the top plate, and the two side plates are located on both sides of the second slide block 207. The top plate is horizontally arranged, and its bottom surface is fixedly connected to the top end of the top rod 213, which is used to transmit the lifting and lowering movement of the top rod 213 to the entire book pusher 211, thereby realizing the height adjustment of the book pusher 211. The two side plates are located on both sides of the second slide block 207 and extend downwards, and the distance between the two side plates is less than the width of the book. During the book separation operation, the front end of the side plate directly pushes the book of a predetermined thickness at the bottom of the stack of books forward, thereby realizing the book separation. The platform 201 has a channel for the two side plates to pass through, so that the bottom end of the side plates can move back and forth with the second slide block 207 below the platform 201, avoiding interference with the platform 201.

[0127] Specifically, such as Figure 10As shown, the second drive assembly includes a push-pull arm 219, a swing arm 220, and a cam 230. One end of the push-pull arm 219 is hinged to the second slide block 207, and the other end is hinged to one end of the swing arm 220. The other end of the swing arm 220 is rotatably mounted on the second pin 231. A roller 232 that cooperates with the cam 230 is mounted in the middle of the swing arm 220. When the cam 230 rotates, it drives the roller 232 to drive the swing arm 220 to swing back and forth around the second pin 231. The swing arm 220 drives the second slide block 207 to reciprocate linearly along the first guide through the push-pull arm 219.

[0128] The second drive assembly uses a cam 230 and a rocker arm 220 to convert rotational motion into reciprocating linear motion of the second slide 207. The cam 230 is the driving element, continuously rotated by a motor. A roller 232 is installed in the middle of the rocker arm 220 and maintains contact with the contour of the cam 230, converting the rotational motion of the cam 230 into reciprocating oscillation of the rocker arm 220 around the second pin 231. One end of the rocker arm 220 is hinged to the second slide 207 via a push-pull arm 219, converting the oscillation into reciprocating linear motion of the second slide 207 along the first guide rod 206. This mechanism has a simple structure, reliable transmission, and can withstand frequent starts and stops and impact loads, making it suitable for the high-speed reciprocating operation of a three-sided book trimmer. In specific implementations, it can also be achieved through other drive methods, such as using hydraulic cylinders, pneumatic cylinders, or electric cylinders.

[0129] Specifically, such as Figure 11 As shown, the feed conveying mechanism 100 includes:

[0130] Frame 102;

[0131] The first conveying mechanism 101 is mounted on the base 102 and is used to convey books along the conveying direction;

[0132] The second conveying mechanism 103 is mounted on the base 102 and located at the output end of the first conveying mechanism 101. Its conveying direction is the same as that of the first conveying mechanism 101, and the conveying speed of the second conveying mechanism 103 is greater than that of the first conveying mechanism 101.

[0133] The friction wheel 104 is mounted above the second conveying mechanism 103 via the second transmission shaft 105, and a conveying channel for holding books is formed between the friction wheel 104 and the second conveying mechanism 103.

[0134] The first conveying mechanism 101 conveys the book to the output end at a low speed. When the front end of the book enters the conveying channel between the second conveying mechanism 103 and the friction wheel 104, the book is instantly accelerated and thrown out because the second conveying mechanism 103 has a faster conveying speed. This speed difference design allows the book to obtain sufficient initial velocity, thereby effectively avoiding the "head-down" phenomenon and ensuring that the book falls smoothly into the platform 201 of the stacking and dividing mechanism 200 and is stacked into a neat stack. At the same time, the friction wheel 104 and the second conveying mechanism 103 clamp the book from above and below to prevent the book from slipping.

[0135] Furthermore, such as Figure 12 , 13 As shown, the second conveying mechanism 103 includes:

[0136] The drive shaft 106 is rotatably mounted on the base 102 and is driven to rotate by the first motor (not shown in the figure). The drive shaft 106 has several annular grooves on its outer periphery.

[0137] Several pulleys 107 are mounted on the machine base 102 via brackets and are located outside the drive shaft 106;

[0138] Several conveyor belts 108 (thin belts, the width of which is adapted to the annular groove and pulley 107) are fitted onto the drive shaft 106 and pulley 107. The number of pulleys 107 and conveyor belts 108 are the same as the number of annular grooves and their positions correspond one-to-one. Multiple conveyor belts 108 are arranged side by side, and their overall conveying width is consistent with the width of the first conveying mechanism 101. This ensures that the book receives full support when transitioning from the first conveying mechanism 101 to the second conveying mechanism 103, preventing the book from deforming or getting stuck due to partial suspension, and improving the smoothness of the conveying.

[0139] A drive pulley 109 is fixed on the drive shaft 106, and a driven pulley 110 and a tension pulley 111 are rotatably mounted on the base 102. A transmission belt 112 is wound around the drive pulley 109, the tension pulley 111, and the driven pulley 110. A synchronous pulley 113 is fixed on the second drive shaft 105, and the synchronous pulley 113 is pressed against the outer surface of the transmission belt 112.

[0140] The driving pulley 109, tension pulley 111, and driven pulley 110 are arranged in a triangle, with the transmission belt 112 wound around them to form a triangular loop. The synchronous pulley 113 on the second transmission shaft 105 is pressed against the outer side of the transmission belt 112. When the drive shaft 106 rotates, the synchronous pulley 113 and the second transmission shaft 105 rotate synchronously via the transmission belt 112, thereby enabling the friction wheel 104 to obtain a linear velocity matching the second conveying mechanism 103. Simultaneously, because the synchronous pulley 113 is pressed against the outer side of the belt, when the second transmission shaft 105 rises and falls, the synchronous pulley 113 always remains in contact with the transmission belt 112, ensuring uninterrupted transmission. This design is compact and reliable.

[0141] Furthermore, such as Figure 13 , 14 As shown, a second motor 114 and a vertical fourth lead screw 115 are mounted on the base 102. A third slider 116 is fitted onto the fourth lead screw 115. Connecting arms 117 are provided on both sides of the third slider 116. The ends of the connecting arms 117 are rotatably connected to the second transmission shaft 105 through bearings. When the second motor 114 drives the fourth lead screw 115 to rotate, it drives the third slider 116 to rise and fall, thereby driving the second transmission shaft 105 and the friction wheel 104 to rise and fall. By driving the fourth lead screw 115 to rotate through the second motor 114, the third slider 116 moves up and down along the lead screw, driving the connecting arms 117 and the second transmission shaft 105 to rise and fall, thereby precisely adjusting the distance between the friction wheel 104 and the second conveying mechanism 103 to accommodate books of different thicknesses and ensure appropriate clamping force.

[0142] Furthermore, such as Figure 14 , 15 As shown, the connecting arm 117 and the third slider 116 are rotatably connected by a first pin 118. The top of the outer peripheral surface of the first pin 118 is provided with a ball socket 119. A top pin 120 is slidably mounted on the top surface of the third slider 116. The bottom of the top pin 120 is provided with a ball head 121 that cooperates with the ball socket 119. A pressure block 122 is provided above the third slider 116. The pressure block 122 is slidably sleeved on the top pin 120. A second compression spring 123 is sleeved on the outside of the top pin 120. The two ends of the second compression spring 123 abut against the pressure block 122 and the ball head 121, respectively.

[0143] After the friction wheel 104 is adjusted to a set height by the second motor 114 and the fourth lead screw 115, this height ensures that the distance between the friction wheel 104 and the second conveying mechanism 103 is slightly less than the thickness of the book. When the book enters the conveying channel between them, the book pushes the friction wheel 104 upward, and the connecting arm 117 rotates upward around the first pin 118. At this time, the second compression spring 123 presses the ball head 121 into the ball socket 119 through the top pin 120, applying a downward swinging elastic force to the connecting arm 117, forcing the friction wheel 104 to press against the book. This structure uses spring force to provide continuous clamping force, ensuring sufficient friction between the friction wheel 104 and the book, while avoiding rigid clamping that could damage the book.

[0144] Furthermore, a vertical screw (not shown in the figure) is fixed to the third slider 116. The upper end of the screw passes through the pressure block 122, and an adjusting nut (not shown in the figure) is threaded onto the screw. The bottom surface of the adjusting nut abuts against the top surface of the pressure block 122. By rotating the adjusting nut, the position of the pressure block 122 on the screw can be changed, thereby adjusting the pre-compression of the second compression spring 123, and thus adjusting the clamping force of the friction wheel 104 on the book. Excessive clamping force may damage the book, while insufficient force may cause slippage. This adjustment structure can precisely set the clamping force for books of different paper types and thicknesses, and is convenient to operate and highly adaptable.

[0145] Preferably, such as Figure 16 , 17 As shown, the base 102 is integrally mounted on the frame 124, and the front end and / or rear end of the base 102 are connected to the frame 124 via a third lifting assembly 125; the third lifting assembly 125 includes:

[0146] The fifth lead screw 126 is vertically mounted on the frame 124;

[0147] The fourth slider 127 is threadedly connected to the fifth lead screw 126;

[0148] Two sliders 128 are fixed to the lower sides of the base 102 respectively, and the two sliders 128 are connected to the two ends of the fourth slider 127 respectively.

[0149] Two second slide rails 129 are fixed on the upper sides of the frame 124 respectively, and the two second slide rails 129 are slidably engaged with two slide bars 128 respectively; the second slide rails 129 are provided with vertical limiting grooves, and the side walls of the slide bars 128 are equipped with locking screws; the locking screws pass through the limiting grooves and are used to lock and fix the slide bars 128 and the second slide rails 129.

[0150] The third lifting assembly 125 is connected to the frame 124, allowing adjustment of the height of the front and rear ends of the base 102. This tilts the entire conveying device, making the front end higher and the rear end lower, thus providing an upward throwing angle when the book leaves the second conveying mechanism 103. Compared to horizontal throwing, this more effectively suppresses the book's front end from drooping, further preventing the book from tipping over. Rotating the fifth lead screw 126 causes the fourth slider 127 to rise and fall along the lead screw, which in turn drives the corresponding end of the base 102 to rise and fall via the slide bar 128. The sliding engagement between the slide bar 128 and the second slide rail 129 provides guidance, the limiting groove restricts the lifting range, and the locking screw, once adjusted, locks the slide bar 128 and the second slide rail 129 securely, preventing loosening during operation. This structure is easy to adjust and reliably locked.

[0151] Furthermore, the slide bar 128 is provided with scale lines. The scale lines can visually display the lifting height on both sides of the base 102, which facilitates precise adjustment by the operator and improves adjustment accuracy.

[0152] In this embodiment, the working process of the three-sided book trimmer is as follows:

[0153] 1) Incoming material transportation process

[0154] The second motor 114 drives the fourth lead screw 115 to rotate, raising and lowering the third slider 116 to a set height, so that the distance between the friction wheel 104 and the second conveying mechanism 103 is slightly less than the normal thickness of the book. The second compression spring 123 applies a downward elastic force to the connecting arm 117 through the top pin 120, keeping the friction wheel 104 in a downward pressing tendency. The front and rear ends of the base 102 are adjusted to the required tilt angle (usually the front end is higher and the rear end is lower) by the third lifting assembly 125.

[0155] The first motor drives the drive shaft 106 to rotate, which in turn drives the second conveying mechanism 103 to run via the conveyor belt 108. At the same time, the drive pulley 109 on the drive shaft 106 drives the synchronous pulley 113 and the second transmission shaft 105 to rotate via the transmission belt 112, so that the friction wheel 104 and the second conveying mechanism 103 rotate in the same direction and have the same linear speed.

[0156] The upstream book is conveyed forward at a low speed by the first conveyor mechanism 101. When the front end of the book enters the conveying channel between the second conveyor mechanism 103 and the friction wheel 104, the book pushes the friction wheel 104 upward, causing the connecting arm 117 to rotate upward around the first pin 118. At the same time, the elastic force of the second compression spring 123 forces the friction wheel 104 downward, clamping the book. Because the conveying speed of the second conveyor mechanism 103 is greater than that of the first conveyor mechanism 101, the book is instantly accelerated and thrown out. Upon being thrown, the book gains an upward velocity component, and the front end does not droop, thus falling smoothly onto the platform 201 of the stacking mechanism 200 to form a stack of books.

[0157] 2) Stacking and Separation Process

[0158] First, determine the thickness of the books to be separated in a single batch according to production needs. Loosen the locking device of the front guide 202 and adjust the height of the front guide 202 using the first lifting component 205 so that the gap between the bottom of the front guide 202 and the platform 201 is equal to the required thickness of the stack of books to be separated. At the same time, loosen the set screw 214 of the second lifting component 212. Under the action of the first compression spring 218, the push rod 213 automatically pushes upward, causing the top plate of the book pusher 211 to drive the two side plates to rise synchronously until the height of the side plates protruding from the top surface of the platform 201 is consistent with the gap at the bottom of the front guide 202. Then, tighten the set screw 214. Since the heights of the two are consistent, the book pusher 211 can only push out the bottom layer of books with the same thickness from the bottom of the front guide 202 each time it pushes out.

[0159] Based on the book size, adjust the front and rear book-blocking positions of the front guide gauge 202 and the rear guide gauge 203, and adjust the left and right book-blocking positions of the two side guide gauges 204 to accurately limit the book stack on the platform 201 (the four guide gauges will "retract" to make room for the book before it falls onto the platform 201, and will "extend" to the adjusted "book-blocking position" after the book falls onto the platform 201 to neatly arrange the book). After the guide gauge book-blocking positions are adjusted, since the position of the book stack boundary on the platform 201 has changed, it is necessary to drive the second slider 209 to move back and forth along the slide groove 208 by rotating the third lead screw 210, and adjust the front and rear position (initial push position) of the book pusher 211 on the second slide block 207 to ensure that the front end of the side plate can accurately contact and push the bottom book when the book pusher 211 moves, ensuring the reliability of the book separation action.

[0160] Books entering the platform 201 are limited by the front guide 202, rear guide 203, and two side guides 204, gradually stacking into a neat pile. The cam 230 of the second drive assembly rotates continuously. When the cam 230 reaches its lift phase, the roller 232 is lifted, and the swing arm 220 swings around the second pivot 231, pushing the second slide 207 forward along the first guide rod 206 via the push-pull arm 219. The second slide 207 drives the book pusher 211 forward synchronously. The front ends of the two side plates of the book pusher 211 pass through the channel of the platform 201, pushing several books at the bottom of the pile (i.e., books of a predetermined thickness at the bottom) forward. Because the gap between the bottom end of the front guide 202 and the platform 201 is consistent with the height of the side plates protruding from the platform 201, the pushed-out bottom books are delivered precisely through the gap at the bottom end of the front guide 202. When the cam 230 rotates to the return phase, the roller 232 returns to its original position, and the swing arm 220 swings in the opposite direction, pulling the second slide 207 and the book pusher 211 backward and reset via the push-pull arm 219. The stack of books above falls as a whole under the action of gravity, filling the space that was pushed out and preparing for the next book separation. This cycle repeats continuously to achieve continuous book separation.

[0161] 3) Side blade adjustment and cutting process

[0162] When the book size needs to be changed, the operator starts the external oil pump, and the oil enters the bottom of the hydraulic chamber 308 through the oil interface 310 and the oil passage 314. As the oil pressure increases, the hydraulic oil pushes the piston 309 to move upward, and the piston 309 lifts the upper connecting block 304. The upper connecting block 304 overcomes the elastic force of the disc spring and slides upward along the positioning pin 306 and the guide slide rod 315. The upper part of the opening of the first clamp 302 is lifted upward, and the locking force between the first clamp 302 and the first main shaft 301 is released. The first clamp 302 is in a freely sliding state. At this time, the disc spring is further compressed and stores elastic potential energy.

[0163] Maintaining oil supply from the oil pump keeps the first clamp 302 in a loosened state. The operator rotates the first lead screw 316 (which can be driven by a motor or gears). Since the first lead screw 316 has two sections of threads with opposite directions, the two transmission nuts 317, each fixed to a side tool holder 303, move the two side tool holders 303 closer to or further apart along the first main shaft 301 when the first lead screw 316 rotates. The operator can rotate the first lead screw 316 as needed until the side tool spacing reaches the set value. Because the first clamp 302 is loosened, there is no additional resistance when the side tool holders 303 move, making adjustment easy and precise.

[0164] After the side blade spacing is adjusted to the correct position, the external oil pump is turned off. The oil pressure in the hydraulic chamber 308 gradually decreases, reducing the lifting force of the piston 309 on the upper connecting block. The spring force of the disc spring pushes the upper connecting block 304 downward to reset. The upper connecting block 304 drives the opening of the first clamp 302 to close through the upper part of the first clamp 302, and the first clamp 302 re-clamps the first spindle 301. At this time, the preload of the disc spring keeps the first clamp 302 reliably locked without any continuous energy consumption. The operator can further check the locking effect and, if necessary, adjust the preload of the disc spring by adjusting the double locking nuts at both ends of the positioning pin 306 to adjust the locking force of the first clamp 302.

[0165] 4) Explosion-proof knife adjustment and pre-cutting process

[0166] The position adjustment of the explosion-proof blade corresponds to that of the side blade. When it is necessary to change the book size, it is not only necessary to adjust the horizontal position (spacing) of the explosion-proof blade to correspond with the side blade, but also to adjust the front and rear position of the explosion-proof blade according to the width of the book.

[0167] The lateral spacing adjustment is divided into two stages: coarse adjustment and fine adjustment. During coarse adjustment, the operator first loosens the locking screws on the second clamp 402 and the third clamp 404, allowing both clamps to slide freely along the second spindle 401. Then, based on the position of the side cutter, the operator manually pushes the second clamp 402 and the third clamp 404 along the second spindle 401 to near the target position. The scale on the second spindle 401 can be used as a reference for quick positioning. After coarse adjustment, the locking screw of the third clamp 404 is tightened to lock the third clamp 404 securely relative to the second spindle 401. Then, the fine-tuning stage begins: The operator rotates the adjusting screw 405. Since the adjusting screw 405 is rotatably mounted on the third clamp 404 via the limiting part 307, its axial position is fixed relative to the third clamp 404. The adjusting block on the outside of the second clamp 402 is threadedly engaged with the adjusting screw 405. Therefore, when the adjusting screw 405 is rotated, the adjusting block drives the second clamp 402 to produce a slight axial displacement along the second main shaft 401, thereby achieving precise fine-tuning of the lateral position of the explosion-proof knife. During the fine-tuning process, the scale can be observed simultaneously to confirm the amount of movement. After the fine-tuning is completed, the locking screw of the second clamp 402 is tightened to lock the second clamp 402 and the second main shaft 401, completing the lateral spacing adjustment.

[0168] During longitudinal position adjustment, the operator starts the servo motor to drive the first drive shaft 409 to rotate. The first drive shaft 409 transmits power to the second lead screw 408 through the meshing of the first bevel gear 410 and the second bevel gear 411, driving the second lead screw 408 to rotate. When the second lead screw 408 rotates, it drives the first slider 407 to move along the first slide rail 406 through the threaded pair. The first slider 407 drives the explosion-proof knife holder 403 and the explosion-proof knife to extend and retract in a direction perpendicular to the second main shaft 401, so that the explosion-proof knife moves closer to or away from the spine. The servo motor can precisely control the number of rotations of the second lead screw 408, thereby precisely controlling the longitudinal extension and retraction of the explosion-proof knife until the explosion-proof knife accurately contacts the spine surface. After the adjustment is in place, the explosion-proof knife remains stationary in that position due to the self-locking characteristic of the threaded pair of the second lead screw 408. The longitudinal adjustment of the explosion-proof knives on both sides is completed synchronously in one go through the bevel gear synchronous transmission mechanism, ensuring that both sides are symmetrical and consistent.

[0169] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A three-sided book trimmer, characterized in that, include: A book conveying mechanism (100) is used to convey books along the conveying direction; The stacking and separating mechanism (200) is located at the output end of the book conveying mechanism (100) and is used to stack the books output by the book conveying mechanism (100) into a book stack and separate the books of a predetermined thickness at the bottom of the book stack to the cutting station; The side blade adjustment mechanism (300) is located at the cutting station and includes a first spindle (301), a first clamp (302) slidably mounted on the first spindle (301), a side blade holder (303) fixed to the bottom of the first clamp (302), a first drive assembly for driving the side blade holder (303) to move axially along the first spindle (301), and a clamp locking assembly for locking or releasing the first clamp (302). An explosion-proof knife adjustment mechanism (400) is located at the cutting station and includes a second spindle (401), a second clamp (402) slidably mounted on the second spindle (401), an explosion-proof knife holder (403) connected to the second clamp (402), and a third clamp (404) slidably mounted on the second spindle (401) and located on one side of the second clamp (402). Both the second clamp (402) and the third clamp (404) are provided with locking screws. An adjustment screw (405) is rotatably mounted on the third clamp (404). The adjustment screw (405) is threadedly engaged with the second clamp (402) and its axial direction is parallel to the second spindle (401). When the adjustment screw (405) is rotated, it drives the second clamp (402) to move relative to the third clamp (404) along the second spindle (401) to adjust the lateral position of the explosion-proof knife holder (403).

2. A three-sided book trimmer as described in claim 1, characterized in that, The clamp locking assembly includes: The upper connecting block (304) is fixedly connected to the upper part of the opening of the first clamp (302); The lower connecting block (305) is fixedly connected to the lower part of the opening of the first clamp (302); The positioning pin (306) is provided at both ends of the positioning pin (306), and the upper connecting block (304) and the lower connecting block (305) are movably sleeved on the positioning pin (306); the positioning pin (306) is provided with limiting members (307) at both ends to limit the range of motion of the upper connecting block (304) and the lower connecting block (305); A hydraulic chamber (308) is formed between the upper connecting block (304) and the lower connecting block (305); The piston (309) is slidably disposed in the hydraulic chamber (308), and its top abuts against the upper connecting block (304); The oil interface (310) is connected to the hydraulic chamber (308) and is used to connect an external oil pump; The elastic element (311) is sleeved on the outside of the positioning pin (306), and its two ends abut against the limiting element (307) at the top of the positioning pin (306) and the upper connecting block (304), respectively. After the oil pump starts, the oil pressure in the hydraulic chamber (308) pushes the piston (309) upward to lift the upper connecting block (304), causing the first clamp (302) to loosen; after the oil pump is turned off, the elastic element (311) pushes the upper connecting block (304) downward to reset, causing the clamp to lock.

3. A three-sided book trimmer as described in claim 2, characterized in that, A first slide block (312) is provided between the upper connecting block (304) and the lower connecting block (305), and the first slide block (312) is sleeved on the outside of the positioning pin (306); the top surface of the first slide block (312) is provided with an annular cavity to form the hydraulic cavity (308), and the piston (309) is slidably embedded in the hydraulic cavity (308) through the sealing ring (313); the oil interface (310) is provided on the side wall of the first slide block (312), and the bottom of the first slide block (312) is provided with an oil passage (314) connecting the oil interface (310) and the hydraulic cavity (308).

4. A three-sided book trimmer as described in claim 1, characterized in that, The first driving component includes: The first lead screw (316) is rotatably mounted on the frame (124), and the first lead screw (316) is provided with two sections of threads with opposite directions; Two transmission nuts (317) are fixedly connected to two side tool holders (303) respectively, and the two transmission nuts (317) are respectively engaged with two sections of thread on the first lead screw (316); when the first lead screw (316) rotates, the two transmission nuts (317) drive the two side tool holders (303) to move closer or further away from each other along the first main shaft (301) axial direction, so as to adjust the distance between the two side tools.

5. A three-sided book trimmer as described in claim 1, characterized in that, The second clamp (402) is provided with a first slide rail (406), which is horizontally arranged and perpendicular to the second main shaft (401). A first slider (407) is slidably connected to the first slide rail (406), and the explosion-proof knife holder (403) is fixedly connected to the first slider (407). The second clamp (402) is provided with a second lead screw (408) arranged parallel to the first slide rail (406). The second lead screw (408) is rotatably mounted on a support at the bottom of the second clamp (402) through a bearing. The second lead screw (408) is connected to the first slider (407) through a threaded pair. A first transmission shaft (409) parallel to the second main shaft (401) is rotatably mounted on the support. A first bevel gear (410) is sleeved on the outside of the first transmission shaft (409). The first bevel gear (410) is circumferentially fixed and axially slidably connected to the first transmission shaft (409). The first bevel gear (410) is rotatably connected to the support at the bottom of the second clamp (402) through a bearing. The end of the second lead screw (408) is fixedly connected to a second bevel gear (411) that meshes with the first bevel gear (410). By driving the first transmission shaft (409) to rotate, the second lead screws (408) on both sides are driven to rotate synchronously, driving the corresponding first slider (407) to move along the first slide rail (406) to synchronously adjust the longitudinal position of the tool holders (303) on both sides.

6. A three-sided book trimmer as described in claim 1, characterized in that, The stacking and distributing mechanism (200) includes: Platform (201), used to support stacked books; A front stop gauge (202), a rear stop gauge (203), and two side stop gauges (204) are respectively provided on the front, rear, and left and right sides of the platform (201) to limit the stack of books on the platform (201); the front stop gauge (202) is installed on the frame (124) through a first lifting component (205), and the first lifting component (205) is used to adjust the gap between the bottom end of the front stop gauge (202) and the platform (201); A first guide rod (206) is positioned below the rear guide gauge (203) along the direction of book stacking. A second slide block (207) is slidably mounted on the first guide rod (206). A groove (208) is formed on the top surface of the second slide block (207) along the axial direction of the first guide rod (206). A second slider (209) is slidably mounted in the groove (208). A third lead screw (210) is rotatably mounted on the second slide block (207). The third lead screw (210) is threadedly engaged with the second slider (209). Rotating the third lead screw (210) drives the second slider (209) to move back and forth along the groove (208). The pusher (211) is mounted on the second slider (209) via the second lifting assembly (212). The second lifting assembly (212) is used to adjust the height of the pusher (211) protruding from the top surface of the platform (201). The height of the pusher (211) protruding from the top surface of the platform (201) is equal to the distance between the bottom end of the front stop (202) and the platform (201). The second drive assembly is used to drive the second slide (207) to move back and forth along the first guide rod (206), so that the book pusher (211) pushes the books of a predetermined thickness at the bottom of the book stack towards the front guide (202) and sends them out from the gap at the bottom of the front guide (202).

7. A three-sided book trimmer as described in claim 6, characterized in that, The second lifting assembly (212) includes: The top rod (213) passes through the second slide (207) and the second slider (209) and is fixedly connected to the book pusher (211); Set screw (214) is installed on the side of the second slider (209), and its end abuts against the outer wall of the push rod (213); The limiting plate (215) is connected to the second slide (207) via the connecting plate and is located below the top rod (213); The top block (216) has its top surface abutting against the bottom of the top rod (213). The bottom of the top block (216) is connected to a vertical second guide rod (217), which slides in cooperation with the sliding hole on the limiting plate (215). The first compression spring (218) is sleeved outside the second guide rod (217), and its two ends abut against the top block (216) and the limiting plate (215) respectively.

8. A three-sided book trimmer as described in claim 1, characterized in that, The feed conveyor mechanism (100) includes: Base (102); The first conveying mechanism (101) is mounted on the base (102) and is used to convey books along the conveying direction; The second conveying mechanism (103) is mounted on the base (102) and located at the output end of the first conveying mechanism (101). Its conveying direction is consistent with that of the first conveying mechanism (101), and the conveying speed of the second conveying mechanism (103) is greater than that of the first conveying mechanism (101). The friction wheel (104) is mounted above the second conveying mechanism (103) via the second drive shaft (105), and a conveying channel for holding books is formed between the friction wheel (104) and the second conveying mechanism (103).

9. A three-sided book trimmer as described in claim 8, characterized in that, The second conveying mechanism (103) includes: A drive shaft (106) is rotatably mounted on a base (102) and driven to rotate by a first motor. The drive shaft (106) has several annular grooves on its outer circumference. The pulley (107) is mounted on the base (102) by a bracket and is located on the outside of the drive shaft (106); A conveyor belt (108) is fitted on a drive shaft (106) and a pulley (107). The number of pulleys (107) and the number of conveyor belts (108) are the same as the number of annular grooves and their positions correspond one-to-one. A drive pulley (109) is fixed on the drive shaft (106), and a driven pulley (110) and a tension pulley (111) are rotatably mounted on the base (102). A transmission belt (112) is wound around the drive pulley (109), the tension pulley (111), and the driven pulley (110). A synchronous pulley (113) is fixed on the second transmission shaft (105), and the synchronous pulley (113) is pressed against the outer surface of the transmission belt (112).

10. A three-sided book trimmer as described in claim 8, characterized in that, A second motor (114) and a vertical fourth lead screw (115) are mounted on the base (102). A third slider (116) is mounted on the fourth lead screw (115). Connecting arms (117) are provided on both sides of the third slider (116). The ends of the connecting arms (117) are rotatably connected to the second transmission shaft (105) through bearings. When the second motor (114) drives the fourth lead screw (115) to rotate, it drives the third slider (116) to rise and fall, thereby driving the second transmission shaft (105) and the friction wheel (104) to rise and fall. The connecting arm (117) and the third slider (116) are rotatably connected by a first pin (118), and the top of the outer peripheral surface of the first pin (118) is provided with a ball socket (119); a top pin (120) is slidably installed on the top surface of the third slider (116), and a ball head (121) that cooperates with the ball socket (119) is provided at the bottom of the top pin (120); a pressure block (122) is provided above the third slider (116), and the pressure block (122) is slidably sleeved on the top pin (120); a second compression spring (123) is sleeved on the outside of the top pin (120), and the two ends of the second compression spring (123) abut against the pressure block (122) and the ball head (121) respectively.

Images