Carving plate conveying mechanism for corrugated paperboard printing

Abstract

The utility model relates to the related technical field of carved plate transportation, in particular to a carved plate transportation mechanism for corrugated paperboard printing, which comprises a rack, a driving motor is fixedly connected to one side of the rack, a driving roller is fixedly connected to the output end of the driving motor, and in the using process, a bolt connected with the rack through a connecting plate is unscrewed to drive the driving roller to rotate. A guide rod penetrates through a guide hole of the connecting plate to ensure that the sliding direction is parallel to the running direction of the conveying belt, the connecting plate is manually pushed to drive the driven roller to move in the direction far away from the driving roller until the surface tension of the conveying belt meets the initial requirement, and after it is confirmed that the tension counting value reaches the standard, the tension counting is completed. When the display value of the tension sensor is continuously lower than the preset value, the tension needs to be manually adjusted for the second time, the pneumatic stopper is lifted, meanwhile, the mechanical positioning pin is inserted into the engraving plate positioning hole to wait for a manual material taking signal, and the engraving plate conveying efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of printing plate transportation, and in particular to a printing plate transportation mechanism for corrugated cardboard printing. Background Technology

[0002] Corrugated board printing is a core part of the packaging industry, and the printing plate, as a crucial printing mold, plays a vital role in the production process, making its transportation crucial. Currently, traditional printing plate transportation methods suffer from low efficiency, poor stability, and inaccurate positioning, severely impacting printing efficiency and quality. To meet the demands of automated and efficient production in printing plants, there is an urgent need to design an efficient, stable, and precise printing plate transportation mechanism. Depending on the different specifications and weights of the printing plates and the actual environment of the production workshop, multiple transportation solutions are required to meet diverse production needs; therefore, a dedicated printing plate transportation mechanism for corrugated board printing is particularly needed.

[0003] However, existing woodblock transport mechanisms have drawbacks. Traditional woodblock transport mechanisms rely on manual periodic adjustment of belt tension, which cannot adapt to continuous production. This results in a high rate of woodblock collision damage. Traditional woodblock transport mechanisms also require manual replacement of guide rail components. Furthermore, the spacing error between woodblocks of different specifications is relatively large, making the woodblocks prone to collision. In addition, traditional woodblock transport mechanisms often operate at a constant speed, and the frequent start and stop of the motor leads to energy waste and affects the efficiency of woodblock transport. Utility Model Content

[0004] The purpose of this utility model is to provide a printing plate transport mechanism for corrugated cardboard printing, in order to solve the problems mentioned in the background art. In the process of use, the belt tension of the traditional printing plate transport mechanism relies on manual periodic adjustment, which cannot adapt to continuous production, resulting in a high rate of printing plate collision damage. The traditional printing plate transport mechanism requires manual replacement of guide rail accessories, and the spacing error of printing plates of different specifications is large, which makes the printing plates easy to collide. In addition, the traditional printing plate transport mechanism often runs at a constant speed, and the frequent start and stop of the motor leads to energy waste and affects the efficiency of printing plate transport.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a printing plate transport mechanism for corrugated cardboard printing, comprising a frame, a drive motor fixedly connected to one side of the frame, an active roller fixedly connected to the output end of the drive motor, a conveyor belt for transporting the printing plate attached to one side of the surface of the active roller, a driven roller attached to one side of the surface of the conveyor belt, a guardrail for preventing the printing plate from tipping over fixedly connected to one end of the frame, a through-beam photoelectric sensor for positioning the printing plate fixedly connected to one side of the guardrail, and a tensioning mechanism provided on one side of the frame;

[0006] The tensioning mechanism includes a connecting plate, a sliding groove, bolts, a guide rod, a tensioning roller, a sliding block, a fixed block, and a counterweight. The connecting plates are attached to both sides of the frame. A sliding groove is opened on one side of the connecting plate. A tensioning roller is attached to one side of the conveyor belt. Both ends of the tensioning roller are connected to sliding blocks by bearings. A fixed block is slidably connected to one side of the sliding block, and a counterweight is fixedly connected to one side of the sliding block.

[0007] Preferably, the conveyor belt is made of polyester canvas core rubber, and the guide rod is slidably connected to the frame.

[0008] Preferably, the driving roller is connected to the connecting plate bearing, and the driven roller is connected to the frame bearing.

[0009] Preferably, the fixing block is fixedly connected to the frame, and bolts are threadedly connected to both sides of the frame.

[0010] Preferably, a guide rod is connected through one side of the connecting plate, and a tension sensor for detecting tension is fixedly connected to one end of the frame.

[0011] Preferably, a pneumatic stopper for intercepting the engraved plate is fixedly connected to the other end of the frame, and an encoder is fixedly connected to one side of the frame.

[0012] Preferably, a laser rangefinder is fixedly connected to the other end of the frame, and a through-beam photoelectric sensor for positioning the engraving plate is fixedly connected to one side of the guardrail.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the printing plate transport mechanism for corrugated cardboard printing, through the setting of the tensioning mechanism, can not only manually adjust the tension through the connecting plate and guide rod, but also automatically offset the thermal expansion and contraction of the conveyor belt through the combination of counterweight and sliding block. Furthermore, when the photoelectric sensor detects the printing plate entering the area, it can trigger a deceleration command, which greatly improves the efficiency of printing plate transport. Attached Figure Description

[0014] Figure 1 This is a side view of the appearance structure of this utility model;

[0015] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0016] Figure 3 This utility model Figure 1 Enlarged structural diagram at point B;

[0017] Figure 4 This utility model Figure 1 Enlarged structural diagram at point C;

[0018] Figure 5 This utility model Figure 1 Enlarged structural diagram at point D;

[0019] Figure 6 This is a schematic diagram of the structure in which part of the frame and the tensioning mechanism of this utility model cooperate.

[0020] In the diagram: 1. Frame; 2. Drive motor; 3. Driven roller; 4. Conveyor belt; 5. Driven roller; 6. Guardrail; 7. Tension sensor; 8. Pneumatic stopper; 9. Encoder; 10. Laser rangefinder; 11. Through-beam photoelectric sensor; 12. Tensioning mechanism; 1201. Connecting plate; 1202. Sliding groove; 1203. Bolt; 1204. Guide rod; 1205. Tensioning roller; 1206. Sliding block; 1207. Fixing block; 1208. Counterweight. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-6 This utility model provides a technical solution: a printing plate transport mechanism for corrugated cardboard printing, including a frame 1, a drive motor 2 fixedly connected to one side of the frame 1, an active roller 3 fixedly connected to the output end of the drive motor 2, a conveyor belt 4 for transporting the printing plate attached to one side of the surface of the active roller 3, a driven roller 5 attached to one side of the surface of the conveyor belt 4, a guardrail 6 for preventing the printing plate from tipping over fixedly connected to one end of the frame 1, a through-beam photoelectric sensor 11 for positioning the printing plate fixedly connected to one side of the guardrail 6, and a tensioning mechanism 12 provided on one side of the frame 1;

[0023] The tensioning mechanism 12 includes a connecting plate 1201, a sliding groove 1202, bolts 1203, a guide rod 1204, a tensioning roller 1205, a sliding block 1206, a fixing block 1207, and a counterweight 1208. Connecting plates 1201 are attached to both sides of the frame 1. A sliding groove 1202 is provided on one side of the connecting plate 1201. A tensioning roller 1205 is attached to one side of the conveyor belt 4. Sliding blocks 1206 are bearing-connected to both ends of the tensioning roller 1205. A fixing block 1207 is slidably connected to one side of the sliding block 1206, and a counterweight 1208 is fixedly connected to one side of the sliding block 1206. During use, by loosening the bolts 1203 connecting the connecting plate 1201 to the frame 1, the connecting plate 1201 can slide horizontally along the frame 1. The guide rod 1204 passes through the guide hole of the connecting plate 1201 to ensure the sliding direction. Parallel to the running direction of conveyor belt 4, manually push the connecting plate 1201 to move the driven roller 5 away from the driving roller 3 until the surface tension of conveyor belt 4 meets the initial requirements. After confirming that the tension count value meets the standard, tighten the bolts 1203 diagonally twice to ensure that there is no relative displacement between the connecting plate 1201 and the frame 1. Check the fit clearance between the guide rod 1204 and the guide hole of the connecting plate 1201. If the clearance is too large, add copper shims to adjust. When the conveyor belt 4 stretches due to thermal expansion and contraction or wear, the tension roller 1205 automatically droops under the weight F = mg of the counterweight 1208 (default 50kg × 9.8N / kg = 490N), stretching the conveyor belt 4 to restore tension. The sliding block 1206 moves vertically along both sides of the fixed block 1207. When the counterweight 1208 reaches the bottom and the compensation stroke is exhausted, manual tension needs to be readjusted.

[0024] Furthermore, the conveyor belt 4 is made of polyester canvas core rubber, and the guide rod 1204 is slidably connected to the frame 1. With the polyester canvas core rubber material of the conveyor belt 4, the polyester canvas core rubber material has high tensile strength, reducing the risk of breakage. At the same time, it also has wear-resistant and weather-resistant properties and optimized thermal stability, making it suitable for long-term tensile loads during continuous transport of engraved plates. The setting of the guide rod 1204 and the frame 1 ensures that the connecting plate 1201 can slide in a straight line, avoiding edge wear of the conveyor belt 4 caused by the skew of the driven roller 5, and improving debugging efficiency.

[0025] Furthermore, the drive roller 3 is connected to the connecting plate 1201 bearing, and the driven roller 5 is connected to the frame 1 bearing. The connection between the drive roller 3 and the connecting plate 1201 allows the bearing connection structure of the connecting plate 1201 to support a quick-release design, greatly reducing the time for replacing bearings and reducing downtime losses. The connection between the driven roller 5 and the frame 1 allows the driven roller 5 and the frame 1 to form a three-point support with the drive roller 3, which reduces the lateral offset of the conveyor belt 4 during operation and lowers the correction frequency.

[0026] Furthermore, the fixing block 1207 is fixedly connected to the frame 1, and bolts 1203 are threadedly connected to both sides of the frame 1. By setting the fixing block 1207 and the frame 1, the displacement error of the fixing block 1207 can be reduced after long-term operation, ensuring the vertical movement of the tension roller 1205 and avoiding tension compensation failure due to loose installation. By setting the frame 1 and the bolts 1203, and cooperating with the adjustment stroke of the bolts 1203, manual tension fine adjustment is supported to meet the transportation needs of different specifications of engraving plates.

[0027] Furthermore, a guide rod 1204 is connected through one side of the connecting plate 1201, and a tension sensor 7 for detecting tension is fixedly connected to one end of the frame 1. Through the setting of the connecting plate 1201 and the guide rod 1204, the guide rod 1204 is connected through the connecting plate 1201 and slides with the frame 1, providing precise linear guidance for the left and right movement of the connecting plate 1201 and the driven roller 5. Through the setting of the frame 1 and the tension sensor 7, the tension sensor 7 provides real-time feedback data. When the tension exceeds the maximum compensation value of the counterweight or is lower than the initial tension lower limit, the tension sensor 7 will trigger an audible and visual alarm and stop the machine, avoiding tearing or slippage accidents of the conveyor belt 4 due to abnormal tension and reducing the accident rate.

[0028] Furthermore, a pneumatic stopper 8 for intercepting the engraving plate is fixedly connected to the other end of the frame 1, and an encoder 9 is fixedly connected to one side of the frame 1. Through the setting of the frame 1 and the pneumatic stopper 8, the pneumatic stopper 8, in conjunction with the mechanical positioning pin, ensures the stable stopping of the engraving plate during high-speed operation. Through the setting of the frame 1 and the encoder 9, the encoder 9 measures the rotational speed of the conveyor belt 4 and converts the mechanical motion into an electrical pulse signal, which is then calculated by the PLC to obtain the linear speed of the conveyor belt 4.

[0029] Furthermore, a laser rangefinder 10 is fixedly connected to the other end of the frame 1, and a through-beam photoelectric sensor 11 for positioning the engraved plate is fixedly connected to one side of the guardrail 6. Through the setup of the frame 1 and the laser rangefinder 10, the laser rangefinder 10 achieves precise positioning when the engraved plate is unloaded, meeting the needs of engraved plate conveying. Through the setup of the guardrail 6 and the through-beam photoelectric sensor 11, the through-beam photoelectric sensor 11 monitors the position of the engraved plate in real time, provides spacing data, and supports dynamic speed adjustment when multiple sizes of engraved plates are transported together.

[0030] Working Principle: During use, by loosening the bolts 1203 connecting the connecting plate 1201 to the frame 1, the connecting plate 1201 can slide horizontally along the frame 1. The guide rod 1204 passes through the guide hole of the connecting plate 1201, ensuring that the sliding direction is parallel to the running direction of the conveyor belt 4. By manually pushing the connecting plate 1201, the driven roller 5 is moved away from the driving roller 3 until the surface tension of the conveyor belt 4 meets the initial requirements. After confirming that the tension count value meets the standard, the bolts 1203 are tightened diagonally twice to ensure that there is no relative displacement between the connecting plate 1201 and the frame 1. The fit clearance between the guide rod 1204 and the guide hole of the connecting plate 1201 is checked. If it exceeds the tolerance, copper shims are added for adjustment. When the conveyor belt 4 stretches due to thermal expansion and contraction or wear, the tension roller 1205 automatically sags under the weight F = mg of the counterweight 1208 (default 50kg × 9.8N / kg = 490N), stretching the conveyor belt 4 to restore tension. The sliding block 1205... 06. The device moves vertically along both sides of the fixed block 1207. When the counterweight block 1208 reaches the bottom and the compensation stroke is exhausted, manual tension needs to be readjusted. When the value displayed by the tension sensor 7 is continuously lower than the preset value, manual tension adjustment is required again. When the laser rangefinder 10 detects that the distance between the engraved plate and the unloading end is ≤5m, the PLC will control the frequency converter of the drive motor 2 to reduce speed. The laser rangefinder 10 continuously monitors the position of the engraved plate. When the error exceeds ±5mm, the PLC fine-tunes the motor speed. The encoder 9 provides real-time feedback on the speed of the conveyor belt 4 to ensure positioning accuracy. When the engraved plate reaches the unloading position, the pneumatic stopper 8 rises, and the mechanical positioning pin is inserted into the engraved plate positioning hole, waiting for the manual material removal signal. After confirming that the material removal is completed, the stopper 8 descends, and the conveyor belt 4 continues to run, greatly improving the efficiency of engraved plate transportation. In addition, a 5mm thick EVA buffer strip is pasted on the inner side of the guardrail 6 to prevent collision damage to the edge of the engraved plate. The tension sensor model is HBM. U10M, measuring range 0-500N; PLC model: Siemens S7-1200; encoder model: Omron E6B2-CWZ6C, 2000P / R; mechanical positioning pin model: φ12mm cylindrical pin, positioning depth 20mm; pneumatic stopper model: SMC CQ2A63-50DM; laser rangefinder model: Keyence IL-600; through-beam photoelectric sensor model: Omron E3C-DS10E4.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A printing plate transport mechanism for corrugated cardboard printing, comprising a frame (1), characterized in that: A drive motor (2) is fixedly connected to one side of the frame (1), and an active roller (3) is fixedly connected to the output end of the drive motor (2). A conveyor belt (4) for conveying the engraving is attached to one side of the surface of the active roller (3), and a driven roller (5) is attached to one side of the surface of the conveyor belt (4). A guardrail (6) for preventing the engraving from tipping over is fixedly connected to one end of the frame (1), and a through-beam photoelectric sensor (11) for positioning the engraving is fixedly connected to one side of the guardrail (6). A tensioning mechanism (12) is provided on one side of the frame (1). The tensioning mechanism (12) includes a connecting plate (1201), a sliding groove (1202), a bolt (1203), a guide rod (1204), a tensioning roller (1205), a sliding block (1206), a fixing block (1207), and a counterweight (1208). The connecting plate (1201) is attached to both sides of the frame (1). A sliding groove (1202) is provided on one side of the connecting plate (1201). A tensioning roller (1205) is attached to one side of the conveyor belt (4). Both ends of the tensioning roller (1205) are connected to the sliding block (1206) by bearings. A fixing block (1207) is slidably connected to one side of the sliding block (1206). A counterweight (1208) is fixedly connected to one side of the sliding block (1206).

2. The engraving plate transport mechanism for corrugated cardboard printing according to claim 1, characterized in that: The conveyor belt (4) is made of polyester canvas core rubber, and the guide rod (1204) is slidably connected to the frame (1).

3. The engraving plate transport mechanism for corrugated cardboard printing according to claim 1, characterized in that: The driving roller (3) is connected to the connecting plate (1201) bearing, and the driven roller (5) is connected to the frame (1) bearing.

4. The engraving plate transport mechanism for corrugated cardboard printing according to claim 1, characterized in that: The fixing block (1207) is fixedly connected to the frame (1), and bolts (1203) are threadedly connected to both sides of the frame (1).

5. The engraving plate transport mechanism for corrugated cardboard printing according to claim 1, characterized in that: A guide rod (1204) is connected through one side of the connecting plate (1201), and a tension sensor (7) for detecting tension is fixedly connected to one end of the frame (1).

6. The engraving plate transport mechanism for corrugated cardboard printing according to claim 1, characterized in that: The other end of the frame (1) is fixedly connected to a pneumatic stopper (8) for intercepting the engraving plate, and an encoder (9) is fixedly connected to one side of the frame (1).

7. The engraving plate transport mechanism for corrugated cardboard printing according to claim 1, characterized in that: A laser rangefinder (10) is fixedly connected to the other end of the frame (1), and a through-beam photoelectric sensor (11) for positioning the engraving plate is fixedly connected to one side of the guardrail (6).

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