A pressure-adjustable paper feeding cutter structure of a folder

Abstract

This utility model relates to the field of paper feeding technology for gluing machines, specifically to an adjustable pressure paper feeding knife structure for a gluing machine. It includes a frame and a paper feeding knife, the paper feeding knife being slidably mounted on the frame. A first fastening structure is provided between the paper feeding knife and the frame. The key feature is that a pressure roller bracket is connected to the lower end of the frame, and a pressure roller assembly is connected to the lower end of the pressure roller bracket. A secondary frame, which drives the pressure roller bracket to move vertically along the frame, is linked to the pressure roller bracket. The secondary frame is slidably mounted at the lower end of the frame, and a second fastening structure is provided between the secondary frame and the frame. The beneficial effects of this utility model are: it provides a paper feeding knife structure for a gluing machine where the pressure roller height is adjustable to adapt to different paper thicknesses, the pressure roller horizontal direction is adjustable to adapt to different paper shapes, the pressure roller can adaptively move up and down slightly to adapt to changes in the thickness of the same paper, the pressure of a single pressure roller is finely adjustable, and the operation is stable, reliable, and convenient.

Description

Technical Field

[0001] This utility model relates to the field of paper feeding technology for gluing machines, specifically to a paper feeding knife structure for a gluing machine with adjustable pressure. Background Technology

[0002] The paper feeder is the core component of the paper feeding system of the gluing machine. Its main function is to separate the stacked carton blanks one by one and transport them to the next processing stage. Its core functions include separation and conveying, which directly affect the paper feeding efficiency and stability of the gluing machine.

[0003] The utility model patent with announcement number CN206551538U discloses an improved paper feeder for a gluing machine. The improved paper feeder is easy to adjust through the cooperation of a linear slide rail and a slider. The lower end of the front surface of the pressure roller plate is provided with a strip-shaped through hole. A pressure roller fixing shaft is inserted through the strip-shaped through hole. A bearing is sleeved on the side of the pressure roller fixing shaft. A pressure roller is sleeved on the side of the bearing.

[0004] Therefore, the pressure roller of the paper knife in this gluing machine applies pressure to the paper by its own weight. The pressure roller and the conveying structure below clamp the paper for transport. However, although the pressure roller can automatically adapt to the paper thickness when the paper thickness changes, the pressure on the paper is always determined by its weight. When dealing with thick paper, the self-weight pressure may be insufficient, resulting in loose pressing and the paper is prone to shifting and slipping during transport. When dealing with thin paper, the self-weight pressure may be too large, which can easily cause paper wrinkles and damage, affecting the processing quality. Utility Model Content

[0005] The purpose of this invention is to provide an adjustable pressure paper feeder structure for a gluing machine, in order to solve the problem that the fixed paper pressing pressure of existing paper feeders cannot meet the pressure requirements of paper of different thicknesses.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an adjustable pressure paper feeder structure for a gluing machine. A gluing machine typically has two parallel paper feeder structures arranged opposite each other, including a frame and paper feeders. The paper feeders are slidably mounted on the frame. A first fastening structure is provided between the paper feeders and the frame. A pressure roller bracket is connected to the lower end of the frame. A pressure roller assembly is connected to the lower end of the pressure roller bracket. A secondary frame is linked to the pressure roller bracket and the frame, driving the pressure roller bracket to move vertically along the frame. The secondary frame is slidably mounted at the lower end of the frame. A second fastening structure is provided between the secondary frame and the frame.

[0007] By employing the above technical solution, the linkage design of the sub-frame and pressure roller support allows the pressure roller assembly to be adjusted vertically along the frame, thus enabling flexible adjustment of the pressure roller pressure. The operator can adjust the pressure of the pressure roller on the paper by loosening the second fastening structure to slide the sub-frame according to different paper thicknesses, thereby changing the gap between the pressure roller and the lower conveying structure. This mechanical adjustment method is simple and reliable, requiring no complex external equipment, reducing manufacturing costs and maintenance difficulty. After adjustment, the sub-frame position is fixed by tightening the second fastening structure, ensuring stable pressure during production and effectively preventing paper shifting or slippage due to insufficient pressure, or paper wrinkling or damage due to excessive pressure.

[0008] The above technical solution can be further configured as follows: the pressure roller assembly includes a pressure roller seat, a pressure roller chassis, a pressure roller spring, and a pressure roller; the pressure roller support is provided with a downward-opening receiving groove; the pressure roller seat is hinged to the groove wall of the receiving groove by a hinge assembly; a first spring groove is provided at the top of the receiving groove; a second spring groove is provided on the side of the pressure roller seat facing the receiving groove; one end of the pressure roller spring is placed in the first spring groove and abuts against the pressure roller support; the other end of the pressure roller spring is placed in the second spring groove and abuts against the pressure roller seat; the middle part of the pressure roller chassis is hinged to the lower end of the pressure roller seat; and the pressure roller is rotatably mounted at both ends of the pressure roller chassis.

[0009] By adopting the above technical solution, the specific structure of the pressure roller assembly, through spring and hinge design, realizes the elastic floating and adaptive pressure adjustment of the pressure roller. The pressure roller spring is placed between the first spring groove and the second spring groove, providing continuous elastic force. The hinge assembly allows the pressure roller seat to swing at a certain angle within the receiving groove. Furthermore, the pressure roller base is hinged to the pressure roller seat, and the pressure roller is rotatably mounted on the pressure roller base, enabling the pressure roller to automatically fine-tune the pressure according to the thickness and surface unevenness of the paper, ensuring tight and uniform pressing, and allowing the pressure roller to roll smoothly when feeding paper.

[0010] The above technical solution can be further configured as follows: a first sliding groove is provided on the side of the lower end of the frame facing the sub-frame, the sub-frame includes a vertical part arranged along the Z-axis direction, the vertical part is installed in the first sliding groove, the second fastening structure includes a first waist hole opened on the vertical part along the Z-axis direction, a first screw hole opened at the lower end of the frame, and a first bolt installed in the first screw hole. After the first bolt passes through the first waist hole, it cooperates with the first screw hole and presses the sub-frame and the frame together to fix them. When the first bolt is loosened, the vertical part can slide up and down in the first sliding groove.

[0011] By employing the above technical solution, the vertical sliding adjustment of the sub-frame on the main frame is achieved through the cooperation of the first slide groove and the first waist hole, combined with the first bolt. The first waist hole is located along the Z-axis, allowing the sub-frame to move within a vertical range. The operator only needs to loosen the first bolt to slide the sub-frame up and down, adjusting the overall height of the pressure roller assembly, thereby changing the pressure of the pressure roller. After adjustment, the first bolt is tightened, and the sub-frame is pressed and fixed by the cooperation of the first bolt and the first screw hole, ensuring that it will not shift during high-speed operation. This design is simple in structure, easy to adjust, and requires no disassembly of parts, improving maintenance efficiency and ease of operation. The first slide groove guides the movement direction of the sub-frame, ensuring the straightness and accuracy of the adjustment and avoiding skew. In addition, the waist hole design provides a continuous stepless adjustment range, allowing fine adjustments to adapt to slight changes in paper thickness, enhancing adaptability to different production conditions, improving the adjustment accuracy and stability of the paper feeder of the gluing machine, and reducing production failures caused by uneven pressure.

[0012] The above technical solution can be further configured as follows: the sub-frame includes a horizontal part arranged perpendicular to the Z-axis direction, the lower ends of the horizontal part extend downward to form a second slide groove, the pressure roller bracket is installed in the second slide groove, and a third fastening structure is provided between the pressure roller bracket and the sub-frame. The third fastening structure includes a second waist hole opened at the top of the second slide groove, a second screw hole opened at the upper end of the pressure roller bracket, and a second bolt installed in the second screw hole. After the second bolt passes through the second waist hole, it cooperates with the second screw hole and presses and fixes the pressure roller bracket and the sub-frame. When the second bolt is loosened, the pressure roller bracket can slide in the second slide groove.

[0013] Using the above technical solution, the horizontal sliding adjustment of the pressure roller bracket on the auxiliary frame is achieved through the second slide groove and the third fastening structure. The second slide groove at the lower end of the horizontal section allows the pressure roller bracket to move horizontally. The operator can adjust the position of the pressure roller bracket by loosening the second bolt, thereby changing the position of the pressure roller. The second slot provides a stepless adjustment range. After adjustment, tightening the second bolt fixes the pressure roller bracket to prevent loosening during operation. The structure of the second slide groove guides the direction of movement. When the two contact boundaries at the front end of the paper are not on the same horizontal line, by adjusting the relative positions of a pair of pressure rollers, the paper can still contact the pressure rollers on both sides simultaneously after passing through the paper feed knife. This allows the pressure rollers on both sides to clamp and transport the paper on both sides simultaneously with the conveying mechanism below, preventing the paper from being clamped on one side and not on the other, which would result in different tension on both sides, causing non-parallel paper feeding and disordered sheeting.

[0014] The above technical solution can be further configured as follows: a third sliding groove is provided on the upper end of the frame facing the paper feeder, and the paper feeder is slidably installed in the third sliding groove; a linear slide rail is provided on the side of the paper feeder facing the frame, and a slide block is provided on the lower end of the frame facing the paper feeder, and the linear slide rail is slidably engaged with the slide block; the first fastening structure includes a third waist hole distributed along the Z-axis direction at the upper end of the frame, a third screw hole at the upper end of the paper feeder, and a third bolt installed in the third screw hole. After the third bolt passes through the third waist hole, it cooperates with the third screw hole and presses and fixes the paper feeder to the frame. When the third bolt is loosened, the linear slide rail can slide in the slide block.

[0015] By employing the above technical solution, the flexible position adjustment of the paper feeder on the frame is achieved through the third slide groove, linear guide rail, and first fastening structure. The cooperation between the third slide groove and the paper feeder, and between the linear guide rail and the slide block, ensures that the paper feeder can slide smoothly, adjusting its position relative to the frame to accommodate paper box blanks of different sizes. The third slotted hole in the first fastening structure is distributed along the Z-axis, allowing the paper feeder to move vertically. Adjustment is achieved by loosening the third bolt, and tightening the third bolt secures the paper feeder, enabling the gluing machine to handle various types of paper and improving the versatility and adjustability of the paper feeder. The linear guide rail reduces friction, making adjustments smoother and providing guidance for the movement of the paper feeder. Furthermore, this structure allows for quick adjustment without disassembling parts, reducing downtime and improving production efficiency.

[0016] The above technical solution can be further configured as follows: the paper feeder includes a sliding block, the sliding block is fixed on the upper end of the paper feeder facing the frame, the sliding block is provided with an adjusting component, the adjusting component includes an adjusting knob and an adjusting rod installed on the lower side of the adjusting knob, the lower end of the adjusting rod is provided with a thread, the upper end of the frame is provided with a fourth threaded hole corresponding to the thread, an adjusting spring is sleeved on the outside of the adjusting rod, one end of the adjusting spring abuts against the sliding block, and the other end of the adjusting spring abuts against the frame.

[0017] By employing the above technical solution, the design of the adjusting component and adjusting spring enables fine-tuning and buffering of the paper feeder. The cooperation between the sliding block and the adjusting component allows the operator to adjust the movement of the adjusting rod by rotating the adjusting knob, thereby changing the position or pressure of the paper feeder. The thread at the lower end of the adjusting rod mates with the fourth screw hole, providing a precise adjustment mechanism. The adjusting spring is sleeved on the outside of the adjusting rod, with one end abutting against the sliding block and the other end against the frame, serving as a buffer and automatic reset mechanism, making the adjustment of the paper feeder more precise and convenient, and allowing for optimized settings based on paper characteristics. The adjusting knob is easy to operate manually, requiring no tools, thus improving operational efficiency.

[0018] The above technical solution can be further configured such that: a wear-resistant ring is also sleeved on the outside of the adjusting rod, one side of the wear-resistant ring abuts against the adjusting knob, and the other side of the wear-resistant ring abuts against the sliding block.

[0019] By employing the above technical solution and incorporating a wear-resistant ring, friction and wear between the adjusting rod and related components are reduced, extending service life. The wear-resistant ring is fitted onto the outside of the adjusting rod, located between the adjusting knob and the sliding block, serving as an isolation and protection mechanism. During adjustment, the wear-resistant ring withstands the friction generated by relative movement, preventing wear caused by direct contact between the adjusting knob and the sliding block, thus maintaining smooth adjustment. This design reduces maintenance frequency and cost: the wear-resistant ring can be replaced as a wear part without replacing the entire adjusting rod or sliding block. Furthermore, the selection of materials for the wear-resistant ring, such as engineered anti-friction and wear-resistant materials, further optimizes friction performance, reduces resistance, and makes adjustment easier. Overall, this structure improves the durability and reliability of the adjusting components, ensuring long-term stable operation.

[0020] The above technical solution can be further configured as follows: the top of the pressure roller seat is provided with a limiting contact, the top of the receiving groove is provided with a fifth screw hole corresponding to the position of the limiting contact, an adjusting screw for adjusting the angle of the pressure roller seat is installed in the fifth screw hole, the adjusting screw is threadedly connected to the fifth screw hole, the limiting contact abuts against the adjusting screw, and an internal hexagonal hole is provided at the upper end of the adjusting screw.

[0021] By employing the above technical solution, precise adjustment of the pressure roller seat angle is achieved through the cooperation of a limiting contact and an adjusting screw. The limiting contact is located at the top of the pressure roller seat and contacts the adjusting screw at the top of the receiving slot. The operator can use a tool such as a hex wrench to rotate the adjusting screw, changing its position and thus adjusting the tilt angle of the pressure roller seat. Since the pressure roller base and the pressure roller seat are hinged, this adjustment effectively fine-tunes the horizontal height of the pressure roller base. When the pressure roller spring force is insufficient, the adjusting screw can be lowered to compress the spring, allowing the spring to provide greater force. This effectively adjusts the pressure of different pressure rollers on the paper at the same height. When the pressure roller spring pressure is too high, the adjusting screw can be raised to extend the spring, reducing the pressure of the spring on the pressure roller seat and thus reducing the pressure of the pressure roller on the paper. This design overcomes the deficiency that the pressure of each pressure roller in the same pressure roller assembly cannot be adjusted individually, enhancing the adaptability and control precision of the pressure roller assembly and improving the stability and quality of paper feeding. The internal hexagonal hole design facilitates operation with standard tools, making adjustments convenient and precise, and improving overall efficiency.

[0022] The above technical solution can be further configured as follows: the hinge assembly includes a hinge sleeve and a countersunk screw, the groove wall of the receiving groove is provided with a chamfered hole, the hinge sleeve is inserted into the pressure roller seat, the hinge sleeve is provided with a sixth threaded hole, and the countersunk screw passes through the chamfered hole and is threadedly connected to the hinge sleeve.

[0023] Using the above technical solution, the specific structure of the hinge assembly achieves a reliable hinge between the pressure roller seat and the receiving groove through the design of the hinge sleeve and countersunk screw. The hinge sleeve is inserted into the pressure roller seat, providing a rotation axis and allowing the pressure roller seat to swing within a certain range to adapt to the entry of paper and surface changes. The countersunk screw passes through the chamfered hole and is threaded into the sixth screw hole of the hinge sleeve, pressing and fixing the assembly. At the same time, the countersunk design avoids the screw head protruding, reducing the risk of interference and wear, while the chamfered hole facilitates installation and alignment, improving assembly efficiency.

[0024] The beneficial effects of this utility model are as follows: it provides a paper feeding knife structure for a gluing machine with adjustable pressure roller height to adapt to different paper thicknesses, adjustable pressure roller horizontal direction to adapt to different paper shapes, pressure roller adaptive to changes in the thickness of the same paper with slight up-and-down movement, and single pressure roller pressure that can be finely adjusted, and it is stable, reliable and easy to operate.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0026] Figure 1 This is an overall structural diagram of this embodiment; Figure 2 This is an exploded view of this embodiment; Figure 3 This is a structural diagram of the pressure roller assembly in this embodiment; Figure 4 This is a structural diagram of the hinge assembly in this embodiment.

[0027] Labeling notes: 1. Frame; 2. Paper feeder; 3. First fastening structure; 4. Pressure roller bracket; 5. Pressure roller assembly; 6. Sub-frame; 7. Second fastening structure; 8. Third fastening structure; 9. Adjusting component; 11. First slide groove; 12. First screw hole; 13. Third slide groove; 14. Slide seat; 15. Third waist hole; 16. Fourth screw hole; 21. Linear slide rail; 22. Sliding block; 23. Third screw hole; 31. Receiving groove; 41. Hinge assembly; 42. First spring groove; 43. Second screw hole; 44. Pressure roller seat; 51. Pressure roller. Wheel base 52, pressure wheel spring 53, pressure wheel 54, limit contact 55, second spring groove 56, vertical part 61, horizontal part 62, second slide groove 63, first waist hole 71, first bolt 72, second waist hole 81, second bolt 82, adjusting knob 91, adjusting rod 92, thread 93, adjusting spring 94, wear-resistant ring 95, adjusting set screw 96, fifth screw hole 97, internal hexagon hole 98, hinge sleeve 421, countersunk screw 422, chamfered hole 423, sixth screw hole 424. Detailed Implementation

[0028] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] like Figure 1-4The adjustable pressure gluing machine for paper feeding provides the following technical solution for the paper feeder structure: The frame 1 serves as an integral support structure. The paper feeder 2 is slidably mounted on the frame 1 and fixed by a first fastening structure 3. The first fastening structure 3 includes a third slotted hole 15 distributed along the Z-axis at the upper end of the frame 1, a third screw hole 23 at the upper end of the paper feeder 2, and a third bolt 31 installed in the third screw hole 23. When the third bolt 31 is loosened, the paper feeder 2 can slide up and down along the frame 1. A pressure roller bracket 4 is connected to the lower end of the frame 1, and a pressure roller assembly 5 is connected to the lower end of the pressure roller bracket 4. The pressure roller assembly 5 includes a pressure roller seat 51 and a pressure roller base 52. The pressure roller spring 53 and pressure roller 54 are provided. The pressure roller bracket 4 is provided with a downward-opening receiving groove 41. The pressure roller seat 51 is hinged to the groove wall of the receiving groove 41 through a hinge assembly 42. A first spring groove 43 is provided at the top of the receiving groove 41. A second spring groove 56 is provided on the side of the pressure roller seat 51 facing the receiving groove 41. One end of the pressure roller spring 53 is placed in the first spring groove 43 and abuts against the pressure roller bracket 4, and the other end is placed in the second spring groove 56 and abuts against the pressure roller seat 51. The middle part of the pressure roller base 52 is hinged to the lower end of the pressure roller seat 51. The pressure roller 54 is rotatably mounted at both ends of the pressure roller base 52. A secondary frame 6 is linked between the pressure roller bracket 4 and the frame 1. The secondary frame 6 is slidable. Located at the lower end of the frame 1, the sub-frame 6 includes a vertical portion 61 arranged along the Z-axis and a horizontal portion 62 arranged perpendicular to the Z-axis. A first groove 11 is provided on the side of the lower end of the frame 1 facing the sub-frame 6, and the vertical portion 61 is installed in the first groove 11. A second fastening structure 7 is provided between the sub-frame 6 and the frame 1. The second fastening structure 7 includes a first slotted hole 71 on the vertical portion 61 along the Z-axis, a first screw hole 12 at the lower end of the frame 1, and a first bolt 72 installed in the first screw hole 12. The first bolt 72 passes through the first slotted hole 71 and engages with the first screw hole 12, pressing and fixing the sub-frame 6 to the frame 1. Loosening the first bolt... At 72, the vertical part 61 can slide up and down in the first slide groove 11; the horizontal part 62 extends downward on both sides of the lower end to form a second slide groove 63, the pressure roller bracket 4 is installed in the second slide groove 63, and a third fastening structure 8 is provided between the pressure roller bracket 4 and the sub-frame 6. The third fastening structure 8 includes a second waist hole 81 opened at the top of the second slide groove 63, a second screw hole 44 opened at the upper end of the pressure roller bracket 4, and a second bolt 82 installed in the second screw hole 44. After the second bolt 82 passes through the second waist hole 81, it cooperates with the second screw hole 44 and presses and fixes the pressure roller bracket 4 and the sub-frame 6. When the second bolt 82 is loosened, the pressure roller bracket 4 can slide in the second slide groove 63.The paper feeder 2 includes a sliding block 22, which is fixed to the upper end of the paper feeder 2 facing the frame 1. An adjusting component 9 passes through the sliding block 22. The adjusting component 9 includes an adjusting knob 91 and an adjusting rod 92 installed below the adjusting knob 91. The lower end of the adjusting rod 92 is provided with a thread 93. The upper end of the frame 1 is provided with a fourth threaded hole 16 corresponding to the thread 93. An adjusting spring 94 is sleeved on the outside of the adjusting rod 92. One end of the adjusting spring 94 abuts against the sliding block 22, and the other end abuts against the frame 1. A wear-resistant ring 95 is also sleeved on the outside of the adjusting rod 92. One side of the wear-resistant ring 95 abuts against the adjusting knob 91, and the other side abuts against the sliding block 22. A limit contact 55 is provided on the top of the pressure roller seat 51. A fifth screw hole 97 is provided at the top of the receiving groove 41 corresponding to the position of the limiting contact 55. An adjusting screw 96 for adjusting the angle of the pressure roller seat 51 is installed in the fifth screw hole 97. The adjusting screw 96 is threadedly connected to the fifth screw hole 97. The limiting contact 55 abuts against the adjusting screw 96. An internal hexagonal hole 98 is provided at the upper end of the adjusting screw 96. The hinge assembly 42 includes a hinge sleeve 421 and a countersunk screw 422. A chamfered hole 423 is provided on the groove wall of the receiving groove 41. The hinge sleeve 421 is inserted into the pressure roller seat 51. The hinge sleeve 421 is provided with a sixth screw hole 424. The countersunk screw 422 passes through the chamfered hole 423 and is threadedly connected to the hinge sleeve 421.

[0030] The working principle of the adjustable pressure gluing machine's paper feeder structure is to achieve precise positioning and pressure control of the paper feeder and pressure roller assembly through multi-dimensional adjustment: During assembly, the paper feeder 2 is first slidably mounted on the slide block 14 of the frame 1 via the linear slide rail 21, and its position is fixed by the third bolt 31 of the first fastening structure 3. When adjusting the paper feeder 2, the third bolt 31 is loosened, and the linear slide rail 21 slides within the slide block 14. After adjustment, the third bolt 31 is tightened. The pressure roller assembly 5 is linked to the frame 1 via the sub-frame 6. The vertical part 61 of the sub-frame 6 slides up and down within the first slide groove 11, and its height is fixed by the first bolt 72 of the second fastening structure 7. The second slide groove 63 of the horizontal part 62 allows the pressure roller bracket 4 to slide horizontally, adapting to different paper shapes and allowing for... The pressure roller assembly 5 is fixed by the second bolt 82 of the third fastening structure 8, thereby realizing the adjustment of the pressure roller assembly 5 in the vertical and horizontal directions; the pressure roller spring 53 provides buffer pressure, the pressure roller 54 rotates on the pressure roller base 52 to adapt to paper feeding, the adjusting screw 96 is adjusted through the internal hexagon hole 98, and the limit contact 55 is pushed to change the angle of the pressure roller seat 51 to optimize the pressure distribution; the adjusting part 9 of the paper feed knife 2 rotates the adjusting rod 92 through the adjusting knob 91, and the thread 93 cooperates with the fourth screw hole 16, the adjusting spring 94 pushes the sliding block 22 to maintain the upward force on the sliding block 22, the wear-resistant ring 95 reduces wear and ensures the stable adjustment of the paper feed knife 2; the hinge assembly 42 realizes the flexible hinge of the pressure roller seat 51 through the countersunk screw 422 and the hinge sleeve 421, which facilitates maintenance and adjustment.

[0031] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. An adjustable pressure paper feeder structure for a gluing machine, comprising a frame and a paper feeder, wherein the paper feeder is slidably mounted on the frame, and a first fastening structure is provided between the paper feeder and the frame, characterized in that: The lower end of the frame is connected to a pressure roller bracket, and the lower end of the pressure roller bracket is connected to a pressure roller assembly. The pressure roller bracket and the frame are linked by a sub-frame that drives the pressure roller bracket to move along the vertical direction of the frame. The sub-frame is slidably arranged at the lower end of the frame, and a second fastening structure is provided between the sub-frame and the frame.

2. The adjustable pressure paper feeder structure for a gluing machine according to claim 1, characterized in that: The pressure roller assembly includes a pressure roller seat, a pressure roller base, a pressure roller spring, and a pressure roller. The pressure roller support is provided with a downward-opening receiving groove. The pressure roller seat is hinged to the groove wall of the receiving groove by a hinge assembly. A first spring groove is provided at the top of the receiving groove. A second spring groove is provided on the side of the pressure roller seat facing the receiving groove. One end of the pressure roller spring is placed in the first spring groove and abuts against the pressure roller support. The other end of the pressure roller spring is placed in the second spring groove and abuts against the pressure roller seat. The middle part of the pressure roller base is hinged to the lower end of the pressure roller seat. The pressure roller is rotatably mounted at both ends of the pressure roller base.

3. The adjustable pressure paper feeder structure for a gluing machine according to claim 1, characterized in that: The lower end of the frame is provided with a first sliding groove on the side facing the sub-frame. The sub-frame includes a vertical part arranged along the Z-axis direction. The vertical part is installed in the first sliding groove. The second fastening structure includes a first waist hole opened on the vertical part along the Z-axis direction, a first screw hole opened at the lower end of the frame, and a first bolt installed in the first screw hole. After the first bolt passes through the first waist hole, it cooperates with the first screw hole and presses the sub-frame and the frame together to fix them. When the first bolt is loosened, the vertical part can slide up and down in the first sliding groove.

4. The adjustable pressure paper feeder structure for a gluing machine according to claim 1, characterized in that: The sub-frame includes a horizontal section arranged perpendicular to the Z-axis. The lower ends of the horizontal section extend downwards on both sides to form a second slide groove. The pressure roller bracket is installed in the second slide groove. A third fastening structure is provided between the pressure roller bracket and the sub-frame. The third fastening structure includes a second waist hole opened at the top of the second slide groove, a second screw hole opened at the upper end of the pressure roller bracket, and a second bolt installed in the second screw hole. After the second bolt passes through the second waist hole, it cooperates with the second screw hole and presses and fixes the pressure roller bracket and the sub-frame. When the second bolt is loosened, the pressure roller bracket can slide in the second slide groove.

5. The adjustable pressure paper feeder structure for a gluing machine according to claim 1, characterized in that: The upper end of the frame is provided with a third sliding groove facing the paper feeder, and the paper feeder is slidably installed in the third sliding groove; the side of the paper feeder facing the frame is provided with a linear slide rail, and the lower end of the frame is provided with a slide block facing the paper feeder, and the linear slide rail is slidably engaged with the slide block; the first fastening structure includes a third waist hole distributed along the Z-axis direction at the upper end of the frame, a third screw hole at the upper end of the paper feeder, and a third bolt installed in the third screw hole. The third bolt passes through the third waist hole and engages with the third screw hole to press and fix the paper feeder to the frame. When the third bolt is loosened, the linear slide rail can slide in the slide block.

6. The adjustable pressure paper feeder structure for a gluing machine according to any one of claims 1-5, characterized in that: The paper feeder includes a sliding block, which is fixed to the upper end of the paper feeder facing the frame. An adjusting component is provided through the sliding block. The adjusting component includes an adjusting knob and an adjusting rod installed below the adjusting knob. The lower end of the adjusting rod is threaded. The upper end of the frame is provided with a fourth threaded hole corresponding to the thread. An adjusting spring is sleeved on the outside of the adjusting rod. One end of the adjusting spring abuts against the sliding block, and the other end of the adjusting spring abuts against the frame.

7. The adjustable pressure paper feeder structure for a gluing machine according to claim 6, characterized in that: The adjustment rod is also fitted with a wear-resistant ring on the outside. One side of the wear-resistant ring abuts against the adjustment knob, and the other side of the wear-resistant ring abuts against the sliding block.

8. The adjustable pressure paper feeder structure for a gluing machine according to claim 2, characterized in that: The pressure roller seat is provided with a limit contact at the top, and a fifth screw hole is provided at the top of the receiving groove corresponding to the position of the limit contact. An adjusting screw for adjusting the angle of the pressure roller seat is installed in the fifth screw hole. The adjusting screw is threadedly connected to the fifth screw hole. The limit contact abuts against the adjusting screw. An internal hexagonal hole is provided at the upper end of the adjusting screw.

9. The adjustable pressure paper feeder structure for a gluing machine according to claim 2, characterized in that: The hinge assembly includes a hinge sleeve and a countersunk screw. The groove wall of the receiving groove is provided with a chamfered hole. The hinge sleeve is inserted into the pressure roller seat. The hinge sleeve is provided with a sixth threaded hole. The countersunk screw passes through the chamfered hole and is threadedly connected to the hinge sleeve.

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