Non-stop sheet delivery device

Abstract

The application discloses a non-stop paper collecting device and belongs to the technical field of printing machinery. The device comprises two side plates, a liftable paper collecting table arranged between the two side plates, and a liftable material receiving cloth strip arranged above the paper collecting table. The material receiving cloth strip is liftable and gradually moves downward in the material receiving process to keep the paper falling height difference constant. The two side plates are provided with vertical guide rails, the guide rails are provided with sliding seats, limiting baffle plates and limiting transmission rollers are arranged between the sliding seats, and the material receiving cloth strip is driven by a synchronous chain to be gradually separated or inserted horizontally. The lifting chain is connected with the sliding seats and is driven by a lifting servo motor, and the paper collecting table is driven by a paper collecting servo motor to be lifted. A controller uniformly controls the servo motors to realize the automation of paper collecting, material receiving and position changing. The device effectively solves the problems of paper pile inclination and looseness, guarantees the neat and stable stacking, improves the efficiency and quality of subsequent packaging and processing, and is suitable for high-speed printing production lines.

Description

Technical Field

[0001] This invention relates to the field of printing machinery technology, and in particular to a non-stop paper collection device for collecting printed materials. Background Technology

[0002] In the printing and die-cutting industry, to improve production efficiency, non-stop paper receiving devices are commonly used to switch between paper receiving stations, avoiding machine downtime or speed reduction when changing paper stacks. An existing fully automatic non-stop paper receiving device for die-cutting machines (see authorization announcement number CN220641971U) includes two side mounting frames. The mounting frames are equipped with horizontally movable multi-support shaft assemblies. Canvas is wound around the support shaft assemblies, with both ends of the canvas fixed to the mounting frames. A rodless cylinder drives the support shaft assemblies to move horizontally, achieving the switching between paper receiving and paper dropping. This device, through the cooperation of the support shaft assemblies and the canvas, replaces the manual insertion and removal of paperboard, reducing manual intervention to a certain extent and shortening the time for changing paper stacks.

[0003] However, the aforementioned existing technologies still have the following shortcomings: 1. Unstable paper receiving position: The support shaft assembly and canvas are at a fixed height during the paper receiving process. As the height of the paper stack increases, the paper landing point gradually rises, which can easily lead to the paper stack tilting and irregular stacking, affecting the stability of subsequent packaging or processing.

[0004] 2. Limited canvas support rigidity: The canvas relies on multiple support shafts for support, which can easily cause bending or shaking when receiving high-speed falling paper. Especially when the paper stack is large, the middle of the canvas is prone to collapse, affecting the flatness of the stack.

[0005] 3. The extraction process is not smooth enough: When the canvas is extracted, it is quickly pulled out from under the paper stack in one go by the rodless cylinder. The bottom of the paper stack loses support instantly, which can easily cause the paper stack to shift or scatter. The risk is even greater on high-speed production lines.

[0006] Therefore, there is an urgent need for a non-stop paper collection device that can maintain a constant paper drop height difference and ensure that the paper stack is neat and stable. Summary of the Invention

[0007] In view of the shortcomings of the prior art, the purpose of this invention is to provide a non-stop paper collection device that can maintain a constant paper drop height difference during continuous paper collection, thereby ensuring that the paper stack is neat and stable and improving the reliability of subsequent processing.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a non-stop paper receiving device, comprising two side plates, with a liftable paper receiving platform between the two side plates, characterized in that: it further comprises a liftable slide, on which a support transmission component is installed, and a receiving cloth is arranged around the support transmission component; the support transmission component is connected to a drive device, which drives the receiving cloth to horizontally insert into or gradually detach from the upper area of ​​the paper receiving platform; during the process of the receiving cloth being gradually detached from the upper area of ​​the paper receiving platform, it maintains a circling running state, achieving continuous and smooth withdrawal.

[0009] The invention is further configured such that: the slide is two slides mounted slidably on their respective vertical guide rails, and the lifting is controlled by a lifting drive mechanism.

[0010] The present invention is further configured such that: the support transmission component includes several cloth shafts, the receiving cloth belt is mounted around the cloth shafts, and is driven by a drive device to move horizontally.

[0011] The present invention is further configured such that: the driving device includes two synchronous chains arranged in a ring, and a plurality of cloth shafts arranged in sequence are connected between the synchronous chains; a pull-out servo motor drives the synchronous chains to move through a sprocket and drives the receiving cloth belt on the cloth shaft to be pulled out horizontally or inserted above the paper receiving table.

[0012] The invention is further configured such that: a limiting baffle and a limiting transmission roller are connected between the synchronous chains, and the limiting baffle and the limiting transmission roller are arranged adjacent to each other; one end of the receiving cloth is connected to one side of the limiting baffle by several tension springs, and the other end of the receiving cloth is connected to the other side of the limiting baffle, so that the receiving cloth forms a loop; there are several limiting transmission rollers, and the outer side of the receiving cloth is tightly attached to the limiting transmission roller, so that the receiving cloth is stably wound around the cloth shaft.

[0013] The invention is further configured such that: the supporting transmission component includes a horizontal plate, and transmission shafts are respectively provided at both ends of the horizontal plate; the receiving fabric belt is wrapped around and installed on the two transmission shafts; the transmission shafts are driven by a transmission servo motor; and the output end of the driving device is connected to the horizontal plate.

[0014] The present invention is further configured such that: the driving device is a horizontal linear motion module, and the slide of the horizontal linear motion module is connected to the horizontal plate through a connector.

[0015] The present invention is further configured such that: the lifting mechanism includes a lifting servo motor, the lifting servo motor drives the lifting chain to rise and fall through a sprocket, and the lifting chain is connected to the slide.

[0016] The invention is further configured such that: the paper receiving platform moves vertically on the side plate and is connected to the paper receiving chain, which is driven by the paper receiving servo motor through a sprocket.

[0017] The invention is further configured to include a controller, which is connected to the pull-out servo motor, the lifting servo motor and the paper receiving servo motor respectively to achieve automatic coordinated operation. Beneficial effects

[0018] This invention features a height-adjustable receiving conveyor belt positioned above the receiving table. This belt descends synchronously during the receiving process, maintaining a constant height difference between the falling papers and preventing stack tilting caused by variations in paper stack height. Two optional support and transmission structures are provided to suit different production line requirements: a belt shaft + synchronous chain structure ensures the receiving conveyor belt's support rigidity under heavy loads, preventing deflection and vibration; a cross plate + drive shaft structure simplifies the belt tension adjustment process and reduces maintenance costs. This device ensures neat and stable paper stacks, improving the efficiency and quality of subsequent packaging and processing. It also boasts a high degree of automation, making it suitable for continuous operation on high-speed printing production lines. The invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0019] Figure 1 This is a perspective view of a specific embodiment of the present invention; Figure 2 This is a partial cross-sectional view of a specific embodiment of the present invention; Figure 3 This is a structural diagram of the horizontal plate + transmission shaft scheme in a specific embodiment of the present invention.

[0020] Explanation of reference numerals in the attached drawings: 201, side plate; 202, vertical guide rail; 203, slide block; 204, limit baffle; 205, limit transmission roller; 206, receiving conveyor belt; 207, tension spring; 208, synchronous chain; 209, pull-out servo motor; 210, lifting servo motor; 211, cloth shaft; 212, lifting chain; 213, paper receiving table; 214, paper receiving chain; 215, paper receiving servo motor; 301, horizontal plate; 302, drive shaft; 303, conveying servo motor; 305, horizontal linear motion module. Detailed Implementation

[0021] The present invention will be specifically described below through embodiments, which are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention.

[0022] like Figure 1 , Figure 2As shown, this embodiment discloses a non-stop paper receiving device, including two side plates 201. Vertical guide rails 202 are fixed to the inner sides of each side plate 201, and slide blocks 203 that can slide up and down are mounted on the vertical guide rails 202. The front ends of the two slide blocks 203 are connected by a limiting baffle 204, which is arranged laterally and located at the end of the movement path of the receiving conveyor belt 206. Behind the limiting baffle 204, two limiting transmission rollers 205 are arranged at the corner position of the synchronous chain 208. The two limiting transmission rollers 205 correspond to the positions of the synchronous chain 208, forming stable support and guidance for the receiving conveyor belt 206.

[0023] The receiving conveyor belt 206 adopts a wraparound structure. One end is fixed to one side of the limiting baffle 204 by multiple tension springs 207, and the other end is fixed to the other side of the limiting baffle 204, keeping the receiving conveyor belt 206 taut in the horizontal direction. The receiving conveyor belt 206 is tightly wrapped around multiple fabric shafts 211. The two ends of these fabric shafts 211 are respectively connected between the synchronous chains 208 of the two slide blocks 203 and move synchronously with the synchronous chains 208. At the same time, the fabric shafts 211 support the load of the receiving conveyor belt. The outer circumferential surface of the limiting drive roller 205 is in close contact with the outer side of the receiving conveyor belt 206 to ensure that the receiving conveyor belt 206 does not shift or vibrate during movement.

[0024] The synchronous chain 208 is arranged in a closed loop in the shape of a "7". The vertical and horizontal sections are connected by a limiting transmission roller 205. This arrangement not only increases the smoothness of the receiving conveyor belt 206's operation but also allows it to gradually withdraw from the bottom of the paper stack when withdrawn, preventing deformation or collapse of the paper stack due to sudden withdrawal. The synchronous chain 208 is driven by a pull-out servo motor 209, which achieves forward and reverse rotation through a sprocket mechanism, thereby controlling the horizontal movement of the receiving conveyor belt 206.

[0025] The lifting and lowering of the slide 203 is driven by a lifting servo motor 210. The lifting servo motor 210 drives the lifting chain 212 through a sprocket. The lifting chain 212 is fixedly connected to the slide 203, thereby driving the entire receiving conveyor belt 206 to lift and lower. The paper receiving table 213 is also mounted on the vertical guide rail 202 and is connected to the paper receiving servo motor 215 through the paper receiving chain 214 to achieve vertical lifting and lowering. The paper receiving table 213 gradually descends during the paper receiving process to accommodate the increase in paper stack height.

[0026] In another alternative implementation, specifically as follows: Figure 3As shown, the supporting transmission component can adopt a horizontal plate 301 structure: transmission shafts 302 are set at both ends of the horizontal plate 301, and the receiving cloth belt 206 is mounted around the two transmission shafts 302 and driven by the transmission servo motor 303; the driving device is correspondingly replaced by a horizontal linear motion module 305, which is installed on the side of the horizontal plate. The horizontal plate 301 is guided to move horizontally along the slide block. The slider on the horizontal linear motion module 305 is connected to the horizontal plate 301, so the horizontal linear motion module 305 directly drives the receiving cloth belt to gradually detach horizontally. Alternatively, a horizontal insertion action can be used, eliminating the need for a synchronous chain and cloth shaft structure, thus simplifying the assembly process. When this solution is adopted, the motor on the horizontal linear motion module 305 and the conveyor servo motor 303 are precisely controlled by the controller, thereby ensuring that when the receiving unit exits above the receiving table 213, the speed at which the conveyor servo motor 303 controls the receiving cloth belt to leave the bottom of the receiving paper stack is consistent with the speed at which the horizontal linear motion module 305 controls the cloth belt 206 to exit above the receiving table 213. In this way, the paper stack can be smoothly and vertically placed onto the receiving table 213 without moving.

[0027] It also includes a controller, which is electrically connected to the pull-out servo motor 209, the lifting servo motor 210, and the paper receiving servo motor 215, and has a preset control program. During operation, the controller first controls the paper receiving servo motor 215 to drive the paper receiving table 213 to descend to the set position to receive paper from the previous process; when the paper stack height reaches the set value, the controller starts the pull-out servo motor 209 to extend the receiving cloth 206 horizontally above the paper receiving table 213, and simultaneously controls the lifting servo motor 210 to make the receiving cloth 206 gradually descend during the receiving process, keeping the paper drop height difference constant.

[0028] After the receiving platform 213 moves out of the unloading position, it returns to a paper-dropping working area below the receiving conveyor belt 206. The controller controls the pull-out servo motor 209 to reverse. Due to the "7"-shaped cyclic arrangement of the synchronous chain 208, the arranged cloth shafts move downward from the horizontal direction. Since both ends of the receiving conveyor belt 206 are connected to the limit baffles 204, the receiving conveyor belt 206 moves downward with the cloth shafts and leaves the horizontal position. During this process, the receiving conveyor belt 206 maintains a circular running state, achieving continuous and smooth gradual detachment from the bottom surface of the receiving paper stack, ensuring that the receiving paper stack is neatly stacked and gently falls onto the receiving platform 213 below. During the process of the receiving conveyor belt 206 gradually detaching from the bottom surface of the paper stack, because it achieves continuous detachment through the cyclical movement of the synchronous chain 208, the paper stack is always in a state of free fall or controlled slow descent, without lateral dragging or friction with the receiving conveyor belt 206. Therefore, the paper stack can be placed vertically and stably on the pre-positioned receiving platform 213 below, avoiding paper displacement, curling, or scattering caused by the rapid withdrawal of the receiving conveyor belt 206. Compared to the traditional method of using a rodless cylinder to completely remove the canvas, this invention achieves truly "undisturbed paper changing," significantly improving the reliability of the receiving process and the stacking quality. Throughout the process, the "7"-shaped cyclic arrangement of the synchronous chain 208 and the cooperation of the limiting drive roller 205 ensure the stable operation of the receiving conveyor belt 206 and the safe and reliable transfer of the paper stack.

Claims

1. A non-stop paper receiving device, comprising two side plates (201), and a liftable paper receiving platform (213) provided between the two side plates (201), characterized in that: It also includes a lifting slide (203), on which a support transmission component is installed, and a receiving cloth belt (206) is arranged around the support transmission component; the support transmission component is connected to a drive device, which drives the receiving cloth belt (206) to be horizontally inserted into or gradually removed from the upper area of ​​the paper receiving table (213); during the process of the receiving cloth belt (206) being gradually removed from the upper area of ​​the paper receiving table (213), it maintains a circular running state to achieve continuous and smooth withdrawal. There are two slides (203) which are slidably installed on their respective vertical guide rails (202) and are controlled by a lifting drive mechanism. The support transmission component includes several cloth shafts, and the receiving cloth belt is mounted around the cloth shafts and driven to move horizontally by the drive device. The drive device includes two circularly arranged synchronous chains (208), and several synchronous chains (208) are connected to each other. The cloth shafts (211) are arranged in sequence. A pull-out servo motor (209) drives a synchronous chain (208) via a sprocket, causing the receiving cloth belt (206) on the cloth shafts (211) to be horizontally pulled away or inserted above the paper receiving table (213). Limiting baffles (204) and limiting transmission rollers (205) are also connected between the synchronous chains (208). The limiting baffles (204) and the limiting transmission rollers (205) are arranged adjacent to each other. One end of the fabric belt (206) is connected to one side of the limiting baffle (204) by several tension springs (207), and the other end of the receiving fabric belt (206) is connected to the other side of the limiting baffle (204), so that the receiving fabric belt (206) forms a loop. There are several limiting drive rollers (205), and the outer side of the receiving fabric belt (206) is tightly attached to the limiting drive rollers (205), so that the receiving fabric belt (206) is stably wrapped around the fabric shaft (211).

2. The non-stop paper receiving device according to claim 1, characterized in that: The lifting drive mechanism includes a lifting servo motor (210), which drives the lifting chain (212) to lift via a sprocket. The lifting chain (212) is connected to the slide (203).

3. The non-stop paper receiving device according to claim 1, characterized in that: The paper receiving table (213) moves vertically on the side plate and is connected to the paper receiving chain (214), which is driven by the paper receiving servo motor (215) through a sprocket.

4. A non-stop paper receiving device, comprising two side plates (201), with a liftable paper receiving platform (213) provided between the two side plates (201), characterized in that: It also includes a lifting slide (203), on which a support transmission component is installed, and a receiving cloth belt (206) is arranged around the support transmission component; the support transmission component is connected to a drive device, which drives the receiving cloth belt (206) to be horizontally inserted into or gradually removed from the upper area of ​​the paper receiving table (213); during the process of the receiving cloth belt (206) being gradually removed from the upper area of ​​the paper receiving table (213), it maintains a circular running state to achieve continuous and smooth withdrawal. There are two slides (203) that are slidably installed on their respective vertical guide rails (202), and are driven by... The lifting drive mechanism controls the lifting, and the support transmission component includes several cloth shafts. The receiving cloth belt is mounted around the cloth shafts and is driven by the drive device to move horizontally. The support transmission component includes a horizontal plate (301). The two ends of the horizontal plate (301) are respectively provided with drive shafts (302). The receiving cloth belt (206) is mounted around the two drive shafts (302). The drive shafts (302) are driven by the transmission servo motor (303). The output end of the drive device is connected to the horizontal plate (301). The drive device is a horizontal linear motion module (305). The slide of the horizontal linear motion module (305) is connected to the horizontal plate (301) through a connector.

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