A blank holder device for corrugated box processing

Abstract

The utility model discloses an edge pressing device for corrugated paper box processing relates to carton processing technical field, including crossbeam, swing arm and top wire, the top wire is through crossbeam outer wall top, crossbeam outer wall top fixed mounting spring seat, swing arm middle part connects hinged axle, the hinged axle fixed connection crossbeam, swing arm one end contact first compression spring top, first compression spring outer wall bottom end abuts spring seat. The utility model discloses through being provided with swing arm and second compression spring, has realized the edge pressing force self -adaptation adjustment function, solved the problem of indentation deviation or depth deficiency, guarantees the stable quality of different thickness corrugated paperboard edge pressing.

Description

Technical Field

[0001] This utility model relates to the field of cardboard box processing technology, specifically to a pressing device for corrugated cardboard box processing. Background Technology

[0002] Corrugated cardboard boxes are widely used in logistics packaging, commodity transportation and other fields due to their advantages such as light weight, high strength and recyclability. The edge pressing process applies pressure to the pre-set crease position of the cardboard to form precise and stable creases, which directly determines the accuracy, sealing and load-bearing strength of the subsequent folding of the cardboard box.

[0003] After the edges are pressed, the fibers at the indentation of the cardboard will slowly recover over time due to the deformation caused by the pressure. The elastic rebound phenomenon is more obvious, especially when the ambient humidity is high. Patent CN216885432U discloses an edge pressing device for corrugated cardboard box processing. The above patent achieves the purpose of good clamping effect of the edge pressing device, avoids the phenomenon of wobbling or displacement of corrugated cardboard boxes during the edge pressing process, and ensures the edge pressing effect of corrugated cardboard boxes. The aforementioned patent avoids the phenomenon of corrugated boxes shaking or shifting during the edge pressing process, but it does not consider the adaptive adjustment capability of the edge pressing force.

[0004] Therefore, this application proposes an edge-pressing device for corrugated carton processing that can adaptively adjust the edge-pressing force according to the thickness of the corrugated cardboard and use hot air to shape the indentation to effectively suppress the elastic rebound of the cardboard fibers. Utility Model Content

[0005] The purpose of this utility model is to provide a pressing device for corrugated cardboard box processing, so as to solve the technical problem mentioned in the background art that the fibers at the cardboard indentation will spring back due to the deformation caused by the pressure after pressing.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pressing device for corrugated cardboard box processing, comprising a crossbeam, a swing arm, and a top screw. The top screw passes through the top end of the outer wall of the crossbeam, and a spring seat is fixedly installed at the top end of the outer wall of the crossbeam. A hinge shaft is connected to the middle of the swing arm, and the hinge shaft is fixedly connected to the crossbeam. One end of the swing arm contacts the top end of a first compression spring, and the bottom end of the outer wall of the first compression spring abuts against the spring seat.

[0007] Preferably, the end of the swing arm is hinged to a pressure plate mounting seat, the bottom of the outer wall of the pressure plate mounting seat is fixedly connected to a second compression spring, the bottom of the outer wall of the second compression spring is fixedly connected to a pressure plate, the bottom of the outer wall of the pressure plate is fixedly installed with an elastic pressure strip, and the upper end of the first compression spring abuts against a set screw.

[0008] Preferably, a connecting ear is fixedly installed on the outer side of the swing arm, and the shaft hole of the connecting ear passes through the linkage shaft.

[0009] Preferably, the pressure plate mounting base has an air distribution cavity embedded inside to form a hollow cavity, the output end of the air distribution cavity is connected to a corrugated pipe, the corrugated pipe is connected to a rotary joint, the rotary joint is connected to a hot air generator, and the hot air generator is fixedly installed on the outer side of the crossbeam. The outer wall of the pressure plate has micro-holes for air outlet, which are connected to the air distribution chamber.

[0010] Preferably, a guide plate is fixedly installed on the inner wall of the air distribution cavity, and the guide plate corresponds to the air outlet micro-holes.

[0011] Preferably, a vertical plate is fixedly installed on the outer side of the crossbeam, and an adjusting screw passes through the inside of the vertical plate, with a slider rotatably connected to the end of the adjusting screw.

[0012] Preferably, a laser rangefinder is fixedly installed on the outer side of the pressure plate mounting base, with the detection end of the laser rangefinder perpendicularly facing the outer surface of the elastic pressure strip, and the outer surface of the elastic pressure strip is provided with anti-slip texture.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model, by installing a swing arm and a second compression spring, realizes the adaptive adjustment function of the pressing force, solves the problem of indentation offset or insufficient depth, and ensures the stable pressing quality of corrugated cardboard of different thicknesses; 2. This utility model, by installing a fabric air chamber, realizes the hot air shaping function of the indentation area, solves the problem of indentation rebound of corrugated cardboard due to the elasticity of the core paper, and improves the folding and forming accuracy of the carton and the sealing performance of the packaging. Attached Figure Description

[0014] Figure 1 This is a front view structural diagram of the pressing device of this utility model; Figure 2 This is a schematic diagram of the side structure of the upright plate of this utility model; Figure 3 This is a schematic diagram of the internal structure of the air distribution cavity of this utility model; Figure 4 This is a schematic diagram of the front structure of the pressure plate of this utility model.

[0015] In the diagram: 1. Crossbeam; 2. Swing arm; 3. Top screw; 4. Hinge shaft; 5. Pressure plate mounting base; 6. Second compression spring; 7. Pressure plate; 8. Elastic pressure strip; 9. Spring seat; 10. Connecting ear; 11. Linkage shaft; 12. Air distribution chamber; 13. Bellows; 14. Air outlet micro-hole; 15. Rotary joint; 16. Hot air generator; 17. Guide plate; 18. Vertical plate; 19. Adjusting screw; 20. Slider; 21. Laser rangefinder; 22. First compression spring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] Please see Figure 1 , Figure 3 and Figure 4 An embodiment of this utility model provides: a pressing device for corrugated cardboard box processing, including a crossbeam 1, a swing arm 2, and a top screw 3. The top screw 3 passes through the top end of the outer wall of the crossbeam 1. A spring seat 9 is fixedly installed at the top end of the outer wall of the crossbeam 1. A hinge shaft 4 is connected to the middle of the swing arm 2. The hinge shaft 4 is fixedly connected to the crossbeam 1. One end of the swing arm 2 contacts the top end of a first compression spring 22. The bottom end of the outer wall of the first compression spring 22 abuts against the spring seat 9. An air outlet micro-hole 14 is opened on the outer wall of the pressing plate 7, and the air outlet micro-hole 14 communicates with the air distribution cavity 12. Specifically, the servo motor drives the conveyor belt to rotate at a constant speed. The swing arm 2 forms a lever structure with the crossbeam 1 through the hinge shaft 4 in the middle. The end of the swing arm 2 near the top screw 3 is lifted upward under the elastic force of the first compression spring 22, and the other end of the swing arm 2 connected to the pressure plate mounting seat 5 hangs down naturally, so that the elastic pressure strip 8 at the bottom of the pressure plate 7 maintains a gap with the surface of the conveyor belt. The size of the gap is determined by the initial position of the top screw 3. When the front end of the cardboard contacts the elastic pressure strip 8, the cardboard exerts an upward pushing force on the elastic pressure strip 8. This pushing force is transmitted to the second compression spring 6 through the pressure plate 7. The second compression spring 6 contracts under pressure, transmitting the pushing force to the pressure plate mounting base 5, forcing the end of the swing arm 2, which is hinged to the pressure plate mounting base 5, to swing upward. Since the swing arm 2 forms a lever structure around the hinge axis 4, the end in contact with the first compression spring 22 presses the first compression spring 22 downward, causing the first compression spring 22 to contract within the spring seat 9. The elastic force of the first compression spring 22 reacts to the swing arm 2, which, through the lever principle, is converted into the pressing force of the elastic pressure strip 8 on the cardboard, achieving initial edge pressing. As the cardboard thickness increases, the upward thrust on the elastic pressure strip 8 increases, causing the second compression spring 6 to contract more, the upward swing amplitude of the swing arm 2 to increase, and the compression of the first compression spring 22 to increase. According to Hooke's Law, the reaction force of the first compression spring 22 increases with the increase of compression. Through the lever amplification effect of the swing arm 2, the elastic pressure strip 8 applies a greater edge-pressing force to the thick cardboard, ensuring consistent indentation depth. When the cardboard becomes thinner, the elastic force of the first and second compression springs decreases, preventing excessive edge-pressing force from causing the cardboard to crack.

[0020] The set screw 3 moves down along the threaded hole at the top of the crossbeam 1, squeezing the first compression spring 22 and increasing the initial preload. The basic pressure of the swing arm 2 on the elastic pressure bar 8 is increased. The set screw 3 is screwed up, the preload of the first compression spring 22 is reduced, and the basic pressure is reduced. During the process, the swing arm 2 forms a rigid connection with the linkage shaft 11 through the connecting ear 10, keeping the pressure plate 7 horizontal and avoiding the indentation from being skewed due to uneven local force.

[0021] Please see Figure 1 and Figure 4 This utility model provides an embodiment of a pressing device for corrugated cardboard box processing. The pressing plate mounting base 5 has an embedded air distribution cavity 12 forming a hollow cavity. The output end of the air distribution cavity 12 is connected to a corrugated pipe 13, which is connected to a rotary joint 15. The rotary joint 15 is connected to a hot air generator 16, which is fixedly installed on the outer side of the crossbeam 1. A guide plate 17 is fixedly installed on the inner wall of the air distribution cavity 12, and the guide plate 17 corresponds to the air outlet micro-holes 14. Specifically, the hot air generator 16 receives the start signal from the control system, and its internal heating wire heats the intake air to a preset temperature. The high-temperature air enters the rotary joint 15 through the output end of the hot air generator 16. The fixed end of the rotary joint 15 is connected to the hot air generator 16, and the movable end is connected to the bellows 13. The bellows 15 rotates freely with the swing of the bellows 13, preventing the hot air delivery pipeline from twisting due to the movement of the swing arm 2. The high-temperature air enters the bellows 13 through the rotary joint 15. The bellows 13 has axial extension and radial bending capabilities. When the swing arm 2 drives the pressure plate mounting seat 5 to float up and down, the bellows 13 can stretch or bend synchronously to keep the hot air passage smooth. High-temperature air enters the air distribution chamber 12 through the corrugated pipe 13. The air distribution chamber 12 is a hollow cavity. The guide plate 17 fixed on the inner wall is set at a 45° angle. The guide plate 17 directs the airflow to the corresponding air outlet micro-holes 14 to prevent the hot air from forming eddies in the cavity. The high-temperature air is blown vertically through the air outlet micro-holes 14 to the indentation area pressed by the elastic pressure strip 8. The cardboard fibers at the indentation undergo slight deformation due to pressure. The hot air accelerates the fiber shaping and prevents the indentation from rebounding.

[0022] Please see Figure 1 , Figure 2 and Figure 3 This utility model provides an embodiment of a pressing device for corrugated cardboard box processing. The end of the swing arm 2 is hinged to a pressing plate mounting seat 5. A second compression spring 6 is fixedly connected to the bottom of the outer wall of the pressing plate mounting seat 5. A pressing plate 7 is fixedly connected to the bottom of the outer wall of the second compression spring 6. An elastic pressing strip 8 is fixedly installed at the bottom of the outer wall of the pressing plate 7. The upper end of the first compression spring 22 abuts against the set screw 3. A laser rangefinder 21 is fixedly installed on the side of the outer wall of the pressing plate mounting seat 5. The detection end of the laser rangefinder 21 is perpendicular to the outer surface of the elastic pressing strip 8. The outer surface of the elastic pressing strip 8 is provided with anti-slip texture. Specifically, the laser rangefinder 21 is fixed to the side of the pressure plate mounting base 5, with its detection end perpendicular to the outer surface of the elastic pressure strip 8, measuring the distance between the laser rangefinder 21 and the surface of the elastic pressure strip 8. When the elastic pressure strip 8 is unworn, the distance serves as a reference value, which the control system stores as initial parameters. As the elastic pressure strip 8 wears due to long-term friction, the distance detected by the laser rangefinder 21 gradually increases. When the deviation between the detected value and the reference value exceeds a preset threshold, the control system determines that the elastic pressure strip 8 is worn beyond the limit and suspends the conveyor belt transport.

[0023] Please see Figure 1 , Figure 2 and Figure 3 This utility model provides an embodiment of a pressing device for corrugated cardboard box processing. A connecting lug 10 is fixedly installed on the outer side of the swing arm 2, and the shaft hole of the connecting lug 10 passes through a linkage shaft 11. A vertical plate 18 is fixedly installed on the outer side of the crossbeam 1, and an adjusting screw 19 passes through the interior of the vertical plate 18. A slider 20 is rotatably connected to the end of the adjusting screw 19. Specifically, when the uneven thickness of the cardboard causes a certain area of ​​the elastic pressure strip 8 to be subjected to a greater upward thrust, the swing arm 2 tends to swing upward around the hinge axis 4. The swing arm 2 swings and drives the linkage shaft 11 to rotate through the connecting ear 10. The linkage shaft 11 is like a rigid shaft, which transmits the force of a single swing arm to all swing arms, so that the pressure plate mounting seat 5 is always horizontal, avoiding the pressure plate 7 from tilting due to local force, and making the pressure of the elastic pressure strip 8 on the cardboard evenly distributed along the width direction.

[0024] To prevent the cardboard from deviating or the indentation position from shifting during the edge pressing process, the swing arm moves synchronously via the linkage shaft 11. The adjusting screw 19 is rotated according to the cardboard width, moving horizontally along the threaded hole of the vertical plate 18. This pushes the slider 20 to slide along the slide rail on the frame, causing the guide plate to move synchronously. The guide plate is fixedly installed on both sides of the conveyor belt, limiting the lateral displacement of the cardboard.

[0025] Working principle: Rotating the top screw 3 through the top of the crossbeam 1, the first compression spring 22 is squeezed or released by the top screw 3, adjusting the initial posture of the swing arm 2. The swing arm 2 forms a lever structure with the crossbeam 1 through the middle hinge shaft 4. The adjusting screw 19 on the vertical plate 18 is rotated according to the width of the cardboard. The adjusting screw 19 pushes the slider 20 to slide along the frame slide rail, driving the guide plates on both sides of the conveyor belt to move synchronously, controlling the gap between the inner side of the guide plate and the edge of the cardboard, and realizing the positioning of the cardboard conveying path; the laser rangefinder 21 detects the surface distance of the elastic pressure strip 8 in the unworn state.

[0026] A servo motor drives the conveyor belt to rotate at a constant speed. The corrugated cardboard to be processed is transported along the path defined by the guide plate. When the front end of the cardboard contacts the elastic pressure strip 8, it generates an upward pushing force on the elastic pressure strip 8. The upward pushing force is transmitted sequentially through the pressure plate 7 to the second compression spring 6 and the pressure plate mounting seat 5, forcing the end of the swing arm 2, which is hinged to the pressure plate mounting seat 5, to swing upward. Since the swing arm 2 forms a lever structure around the hinge axis 4, the other end of the swing arm 2 simultaneously squeezes the first compression spring 22 downward. The reaction force of the first compression spring 22 is converted into the edge pressing force of the elastic pressure strip 8 on the cardboard through the lever principle. If the thickness of the cardboard increases, the force on the elastic pressure strip 8 increases, the contraction of the second compression spring 6 increases, the swing amplitude of the swing arm 2 increases, and the compression of the first compression spring 22 increases. According to Hooke's law, its reaction force increases, and through the lever amplification, the elastic pressure strip 8 applies a larger edge pressing force to the thick cardboard. The swing arm 2 is rigidly connected to the linkage shaft 11 via the side connecting ear 10. The swing arm moves synchronously through the linkage shaft 11 to prevent the indentation from being skewed. The hot air generator 16 heats the air, and the high-temperature air enters the air distribution chamber 12 in the pressure plate mounting base 5 through the rotary joint 15 and the corrugated pipe 13. The guide plate 17 with a 45° inclined inner wall of the air distribution chamber 12 guides the hot air to the air outlet micro-holes 14 on the pressure plate 7. The hot air blows vertically towards the newly pressed indentation area, accelerating the shaping of the cardboard fibers and preventing the indentation from rebounding.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A pressing device for processing corrugated cardboard boxes, characterized in that: It includes a crossbeam (1), a swing arm (2) and a set screw (3). The set screw (3) passes through the top of the outer wall of the crossbeam (1). A spring seat (9) is fixedly installed at the top of the outer wall of the crossbeam (1). The middle part of the swing arm (2) is connected to a hinge shaft (4). The hinge shaft (4) is fixedly connected to the crossbeam (1). One end of the swing arm (2) contacts the top of the first compression spring (22). The bottom end of the outer wall of the first compression spring (22) abuts against the spring seat (9).

2. The edge-pressing device for corrugated cardboard box processing according to claim 1, characterized in that: The end of the swing arm (2) is hinged to the pressure plate mounting seat (5), the bottom of the outer wall of the pressure plate mounting seat (5) is fixedly connected to the second compression spring (6), the bottom of the outer wall of the second compression spring (6) is fixedly connected to the pressure plate (7), the bottom of the outer wall of the pressure plate (7) is fixedly installed with the elastic pressure strip (8), and the upper end of the first compression spring (22) abuts against the top screw (3).

3. The edge-pressing device for corrugated cardboard box processing according to claim 1, characterized in that: The connecting ear (10) is fixedly installed on the outer side of the swing arm (2), and the shaft hole of the connecting ear (10) passes through the linkage shaft (11).

4. The edge-pressing device for corrugated cardboard box processing according to claim 2, characterized in that: The pressure plate mounting base (5) is embedded with an air distribution cavity (12) to form a hollow cavity. The output end of the air distribution cavity (12) is connected to a corrugated pipe (13). The corrugated pipe (13) is connected to a rotary joint (15). The rotary joint (15) is connected to a hot air generator (16). The hot air generator (16) is fixedly installed on the outer side of the crossbeam (1). Air outlet micro-holes (14) are opened on the outer wall of the pressure plate (7), and the air outlet micro-holes (14) are connected to the air distribution cavity (12).

5. The edge-pressing device for corrugated cardboard box processing according to claim 4, characterized in that: The air distribution chamber (12) has a guide plate (17) fixedly installed on its inner wall, and the guide plate (17) corresponds to the air outlet micro-hole (14).

6. The edge-pressing device for corrugated cardboard box processing according to claim 1, characterized in that: A vertical plate (18) is fixedly installed on the outer side of the crossbeam (1), and an adjusting screw (19) passes through the inside of the vertical plate (18). The end of the adjusting screw (19) is rotatably connected to a slider (20).

7. The edge-pressing device for corrugated cardboard box processing according to claim 2, characterized in that: A laser rangefinder (21) is fixedly installed on the outer side of the pressure plate mounting base (5). The detection end of the laser rangefinder (21) is perpendicular to the outer surface of the elastic pressure strip (8). Anti-slip texture is provided on the outer surface of the elastic pressure strip (8).

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