Paper cutter device for a printing unit of a web press

Abstract

The utility model discloses a paper cutting knife device for printing unit of web printing machine, including support, support sets up between printing unit and folding machine and between printing unit and printing unit, and the both ends of support are tightly held in the both end axle head position of paper roll, and a connecting shaft is fixedly arranged in the middle of paper roll, and bearing is arranged between the both ends of connecting shaft and the roller body of paper roll respectively, and the roller body of paper roll is used for guiding paper tape, and the rotation of roller body of paper roll realizes through the friction force of paper tape and roller body surface, and paper cutting knife mechanism is arranged on the support, and paper cutting knife mechanism cuts paper tape, and the paper end of printing unit sets up paper cutting detection mechanism, and paper roll is located close to one side of paper cutting detection mechanism, and paper cutting detection mechanism is used for detecting the paper cutting condition in real time, and sends paper cutting signal when paper tape breaks. The utility model solves the problem that the prior art installs paper cutting detection sensor on the printing machine, makes the gap between printing cylinder increase, and influences the printing quality.

Description

Technical Field

[0001] This utility model belongs to the technical field of roll paper printing machines, and specifically relates to a paper cutter device for the printing unit of a roll paper printing machine. Background Technology

[0002] With the improvement of printing efficiency, the speed of printing presses is getting higher and higher. During printing, a roll of paper tape is often passed through the printing press to print text and / or patterns on the paper tape. Due to the limited tensile strength of the paper tape, it is easy to break when there are cracks in the paper tape or when the tension of the paper tape is too high. Especially in high-speed printing, when the paper tape breaks, the printing press will not stop immediately due to the inertia of the operation. The paper tape coming out of the printing press cannot be transported to the paper cutter in time. The broken paper tape will be wrapped around the rubber roller of the last printing unit. Sometimes the paper tape will even enter the rubber roller, which is troublesome to clean. Moreover, the accumulation and winding of paper tape on the rubber roller can easily damage the rubber cloth.

[0003] To detect paper tape breakage in a timely manner, the existing technology involves installing a paper breakage detection sensor on the printing press. When a paper breakage signal is received, the printing press, which is in normal printing operation, depresses the printing cylinders to increase the gap between them and protect them. However, this operation is cumbersome and unsafe, and it also affects the quality and efficiency of printing, as well as the safety of the equipment. The low efficiency of the operation fails to meet the work requirements. Utility Model Content

[0004] The purpose of this invention is to provide a paper-cutting knife device for the printing unit of a web-based printing press, which solves the problem that installing a paper-cutting detection sensor on the printing press in the prior art increases the gap between the printing cylinders and affects the printing quality.

[0005] The technical solution adopted in this utility model is a paper-cutting knife device for the printing unit of a web-fed printing press, including a bracket. The bracket is set between the printing press unit and the folding machine, and between the printing press units. The two ends of the bracket are tightly held at the two ends of the paper feed roller. A connecting shaft is fixedly set in the middle of the paper feed roller. Bearings are respectively set between the two ends of the connecting shaft and the roller body of the paper feed roller. The roller body of the paper feed roller is used to guide the paper tape. The rotation of the roller body of the paper feed roller is achieved by the friction force between the paper tape and the surface of the roller body. A paper-cutting knife mechanism is set on the bracket to cut the paper tape. A paper breakage detection mechanism is set at the paper output end of the printing press unit. The paper feed roller is located on the side close to the paper breakage detection mechanism. The paper breakage detection mechanism is used to detect the paper breakage in real time and issue a paper breakage signal when the paper tape breaks.

[0006] The features of this utility model also include: The paper cutter mechanism includes a paper cutter, a cutter holder, and a cutter groove tube. The cutter holder consists of three rectangular plates welded on three sides, two square plates welded on both ends, and a cover plate. The cylinder for the paper cutter is fixed inside the upper rectangular plate. A pull rod groove is opened on the lower rectangular plate for the pull rod to pass through. Several cutter grooves for the paper cutter are opened on the cutter groove tube. The rectangular plate on the right, the upper rectangular plate, the lower rectangular plate, and two square plates at both ends are welded into a whole. Small shafts are welded to both ends of the whole for easy rotation. After the cover plate is installed on the left side, the cutter groove tube is installed on the cover plate to complete the installation of the paper cutter mechanism.

[0007] The lever and paper cutter are mounted on the extended end of the cylinder.

[0008] The cylinder is electrically connected to a solenoid valve, and the cylinder is connected to an air tank. The air source stored in the air tank enters the cylinder through the solenoid valve.

[0009] The solenoid valve is electrically connected to the main control system, and the main control system is electrically connected to the paper breakage detection mechanism.

[0010] The paper breakage detection mechanism includes a transmitter and a receiver, with a paper strip located between the transmitter and the receiver, which are spaced apart in a direction perpendicular to the paper strip.

[0011] The transmitter includes a light source, and the receiver includes a photosensitive sensor, which acquires information from the paper tape.

[0012] The photosensitive sensor is electrically connected to the host control system.

[0013] The beneficial effects of this invention are as follows: The paper-cutting knife device for the printing unit of a web printing press has a simple paper conveying structure and low manufacturing cost. When the photosensitive sensor detects a paper break, it sends a feedback signal, and the paper-cutting knife operates to break the paper belt. This invention has good stability and high reliability, improves print quality, and plays an important role in enhancing the overall performance of the machine. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the paper-cutting knife device for the printing unit of a web-fed printing press according to the present invention. Figure 2 This is a schematic diagram of the installation position of the paper feed roller of this utility model.

[0015] In the diagram, 1. Paper cutter mechanism, 2. Pull rod, 3. Cylinder, 4. Solenoid valve, 5. Knife holder, 6. Bracket, 7. Paper feed roller, 8. Photosensitive sensor, 9. Paper tape. Detailed Implementation

[0016] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0017] Example 1 This utility model relates to a paper-cutting knife device for the printing unit of a roll-to-roll printing press, the structure of which is as follows: Figure 1 As shown, the system includes a support 6, which is positioned between the printing press unit and the folding machine, as well as between the printing press units. Both ends of the support 6 are tightly secured to the shaft ends of the paper feed roller 7. A connecting shaft is fixedly installed in the middle of the paper feed roller 7. Bearings are installed at both ends of the connecting shaft and the roller body of the paper feed roller 7. The roller body of the paper feed roller 7 guides the paper strip 9. The rotation of the roller body is achieved through the frictional force between the paper strip 9 and the roller body surface. A paper-cutting knife mechanism 1 is installed on the support 6 to cut the paper strip 9. A paper breakage detection mechanism is installed at the paper output end of the printing press unit, with the paper feed roller 7 located near the paper breakage detection mechanism. The paper breakage detection mechanism is used to detect paper breaks in real time and issues a paper breakage signal when the paper strip 9 breaks.

[0018] Example 2 This utility model relates to a paper-cutting knife device for a web-fed printing press printing unit, comprising a bracket 6, which is positioned between the printing press unit and the folding machine, and between two printing press units. The bracket 6 is held at both ends by the shaft ends of a paper feed roller 7. A connecting shaft is fixedly installed in the middle of the paper feed roller 7, and bearings are respectively installed between the two ends of the connecting shaft and the roller body of the paper feed roller 7. The roller body of the paper feed roller 7 guides the paper strip 9, and the rotation of the roller body is achieved by the frictional force between the paper strip 9 and the roller body surface. A paper-cutting knife mechanism 1 is installed on the bracket 6 to cut the paper strip 9. A paper breakage detection mechanism is installed at the paper output end of the printing press unit, with the paper feed roller 7 located near the paper breakage detection mechanism. The paper breakage detection mechanism is used to detect paper breaks in real time and issues a paper breakage signal when the paper strip 9 breaks. Based on Embodiment 1, the paper-cutting knife mechanism 1 in this embodiment includes a paper-cutting knife, a knife holder 5, and a knife groove tube. The knife holder includes three rectangular plates welded on three sides, two square plates welded on both ends, and a cover plate. The cylinder 3 for the paper-cutting knife is fixed inside the upper rectangular plate. A pull rod groove for the pull rod 2 is opened on the lower rectangular plate. Several knife grooves for the paper-cutting knife are opened on the knife groove tube. The rectangular plate on the right, the upper rectangular plate, the lower rectangular plate, and two square plates at both ends are welded into a whole. Small shafts are welded to both ends of the whole for easy rotation. After the cover plate is installed on the left side, the knife groove tube is installed on the cover plate to complete the installation of the paper-cutting knife mechanism 1.

[0019] Example 3 This utility model relates to a paper-cutting knife device for a web-fed printing press printing unit, comprising a bracket 6, which is positioned between the printing press unit and the folding machine, and between two printing press units. The bracket 6 is held at both ends by the shaft ends of a paper feed roller 7. A connecting shaft is fixedly installed in the middle of the paper feed roller 7, and bearings are respectively installed between the two ends of the connecting shaft and the roller body of the paper feed roller 7. The roller body of the paper feed roller 7 guides the paper strip 9, and the rotation of the roller body is achieved by the frictional force between the paper strip 9 and the roller body surface. A paper-cutting knife mechanism 1 is installed on the bracket 6 to cut the paper strip 9. A paper breakage detection mechanism is installed at the paper output end of the printing press unit, with the paper feed roller 7 located near the paper breakage detection mechanism. The paper breakage detection mechanism is used to detect paper breaks in real time and issues a paper breakage signal when the paper strip 9 breaks. The paper-cutting knife mechanism 1 includes a paper-cutting knife, a knife holder 5, and a knife groove tube. The knife holder includes three rectangular plates welded on three sides, two square plates welded on both ends, and a cover plate. A cylinder 3 for fixing the paper-cutting knife is fixed inside the upper rectangular plate. A pull rod groove for the pull rod 2 is opened on the lower rectangular plate. Several knife grooves for the paper-cutting knife are opened on the knife groove tube. A rectangular plate on the right, the upper rectangular plate, the lower rectangular plate, and two square plates at both ends are welded together to form a whole. Small shafts are welded to both ends of the whole for easy rotation. After installing the cover plate on the left side, the knife groove tube is then installed on the cover plate, completing the installation of the paper-cutting knife mechanism 1. Based on embodiment 2, in this embodiment, the pull rod 2 and the paper-cutting knife are installed at the extended end of the cylinder 3, and the cylinder 3 is electrically connected to a solenoid valve 4.

[0020] Example 4 This utility model relates to a paper-cutting knife device for a web-fed printing press printing unit, comprising a bracket 6, which is positioned between the printing press unit and the folding machine, and between two printing press units. The bracket 6 is held at both ends by the shaft ends of a paper feed roller 7. A connecting shaft is fixedly installed in the middle of the paper feed roller 7, and bearings are respectively installed between the two ends of the connecting shaft and the roller body of the paper feed roller 7. The roller body of the paper feed roller 7 guides the paper strip 9, and the rotation of the roller body is achieved by the frictional force between the paper strip 9 and the roller body surface. A paper-cutting knife mechanism 1 is installed on the bracket 6 to cut the paper strip 9. A paper breakage detection mechanism is installed at the paper output end of the printing press unit, with the paper feed roller 7 located near the paper breakage detection mechanism. The paper breakage detection mechanism is used to detect paper breaks in real time and issues a paper breakage signal when the paper strip 9 breaks. The paper-cutting knife mechanism 1 includes a paper-cutting knife, a knife holder 5, and a knife groove tube. The knife holder includes three rectangular plates welded on three sides, two square plates welded on both ends, and a cover plate. A cylinder 3, which holds the paper-cutting knife, is fixed inside the upper rectangular plate. A pull rod groove for the pull rod 2 is formed on the lower rectangular plate. Several knife grooves for the paper-cutting knife are formed on the knife groove tube. A rectangular plate on the right, the upper rectangular plate, the lower rectangular plate, and two square plates at each end are welded together to form a whole. Small shafts are welded to both ends of the whole for easy rotation. After installing the cover plate on the left side, the knife groove tube is then installed on the cover plate, completing the installation of the paper-cutting knife mechanism 1. The pull rod 2 and the paper-cutting knife are installed at the extended end of the cylinder 3, which is electrically connected to a solenoid valve 4. Based on embodiment 3, in this embodiment, the cylinder 3 is connected to an air storage tank, and the air source stored in the air storage tank enters the cylinder 3 through the solenoid valve.

[0021] Example 5 This utility model relates to a paper-cutting knife device for a web-fed printing press printing unit, comprising a bracket 6, which is positioned between the printing press unit and the folding machine, and between two printing press units. The bracket 6 is held at both ends by the shaft ends of a paper feed roller 7. A connecting shaft is fixedly installed in the middle of the paper feed roller 7, and bearings are respectively installed between the two ends of the connecting shaft and the roller body of the paper feed roller 7. The roller body of the paper feed roller 7 guides the paper strip 9, and the rotation of the roller body is achieved by the frictional force between the paper strip 9 and the roller body surface. A paper-cutting knife mechanism 1 is installed on the bracket 6 to cut the paper strip 9. A paper breakage detection mechanism is installed at the paper output end of the printing press unit, with the paper feed roller 7 located near the paper breakage detection mechanism. The paper breakage detection mechanism is used to detect paper breaks in real time and issues a paper breakage signal when the paper strip 9 breaks. The paper-cutting knife mechanism 1 includes a paper-cutting knife, a knife holder 5, and a knife groove tube. The knife holder includes three rectangular plates welded on three sides, two square plates welded on both ends, and a cover plate. A cylinder 3, which holds the paper-cutting knife, is fixed inside the upper rectangular plate. A pull rod groove for the pull rod 2 is formed on the lower rectangular plate. Several knife grooves for the paper-cutting knife are formed on the knife groove tube. A rectangular plate on the right, an upper rectangular plate, a lower rectangular plate, and two square plates at each end are welded together to form a whole. Small shafts are welded to both ends of the whole for easy rotation. After installing the cover plate on the left side, the knife groove tube is then installed on the cover plate, completing the installation of the paper-cutting knife mechanism 1. The pull rod 2 and the paper-cutting knife are installed at the extended end of the cylinder 3. The cylinder 3 is electrically connected to a solenoid valve 4. The cylinder 3 is connected to an air tank, and the air source stored in the air tank enters the cylinder 3 through the solenoid valve. Based on embodiment 4, in this embodiment, the solenoid valve 4 is electrically connected to the main control system, and the main control system is electrically connected to the paper-cutting detection mechanism.

[0022] Example 6 This utility model relates to a paper-cutting knife device for a web-fed printing press printing unit, comprising a bracket 6, which is positioned between the printing press unit and the folding machine, and between two printing press units. The bracket 6 is held at both ends by the shaft ends of a paper feed roller 7. A connecting shaft is fixedly installed in the middle of the paper feed roller 7, and bearings are respectively installed between the two ends of the connecting shaft and the roller body of the paper feed roller 7. The roller body of the paper feed roller 7 guides the paper strip 9, and the rotation of the roller body is achieved by the frictional force between the paper strip 9 and the roller body surface. A paper-cutting knife mechanism 1 is installed on the bracket 6 to cut the paper strip 9. A paper breakage detection mechanism is installed at the paper output end of the printing press unit, with the paper feed roller 7 located near the paper breakage detection mechanism. The paper breakage detection mechanism is used to detect paper breaks in real time and issues a paper breakage signal when the paper strip 9 breaks. The paper-cutting knife mechanism 1 includes a paper-cutting knife, a knife holder 5, and a knife groove tube. The knife holder includes three rectangular plates welded on three sides, two square plates welded on both ends, and a cover plate. A cylinder 3, which holds the paper-cutting knife, is fixed inside the upper rectangular plate. A pull rod groove for the pull rod 2 is formed on the lower rectangular plate. Several knife grooves for the paper-cutting knife are formed on the knife groove tube. A rectangular plate on the right, the upper rectangular plate, the lower rectangular plate, and two square plates at each end are welded together to form a single unit. Small shafts are welded to both ends of this unit for easy rotation. After installing the cover plate on the left side, the knife groove tube is then installed on the cover plate, completing the installation of the paper-cutting knife mechanism 1. The pull rod 2 and the paper-cutting knife are installed at the extended end of the cylinder 3. The cylinder 3 is electrically connected to a solenoid valve 4. The cylinder 3 is connected to an air tank, and the air stored in the air tank enters the cylinder 3 through the solenoid valve. The solenoid valve 4 is electrically connected to the main control system, and the main control system is electrically connected to the paper-cutting detection mechanism. Based on Example 5, the paper breakage detection mechanism in this example includes a transmitter and a receiver, with the paper tape located between the transmitter and the receiver, and the transmitter and receiver being spaced apart along a direction perpendicular to the paper tape.

[0023] Example 7 This utility model relates to a paper-cutting knife device for a web-fed printing press printing unit, comprising a bracket 6, which is positioned between the printing press unit and the folding machine, and between two printing press units. The bracket 6 is held at both ends by the shaft ends of a paper feed roller 7. A connecting shaft is fixedly installed in the middle of the paper feed roller 7, and bearings are respectively installed between the two ends of the connecting shaft and the roller body of the paper feed roller 7. The roller body of the paper feed roller 7 guides the paper strip 9, and the rotation of the roller body is achieved by the frictional force between the paper strip 9 and the roller body surface. A paper-cutting knife mechanism 1 is installed on the bracket 6 to cut the paper strip 9. A paper breakage detection mechanism is installed at the paper output end of the printing press unit, with the paper feed roller 7 located near the paper breakage detection mechanism. The paper breakage detection mechanism is used to detect paper breaks in real time and issues a paper breakage signal when the paper strip 9 breaks. The paper-cutting knife mechanism 1 includes a paper-cutting knife, a knife holder 5, and a knife groove tube. The knife holder includes three rectangular plates welded on three sides, two square plates welded on both ends, and a cover plate. A cylinder 3, which holds the paper-cutting knife, is fixed inside the upper rectangular plate. A pull rod groove for the pull rod 2 is formed on the lower rectangular plate. Several knife grooves for the paper-cutting knife are formed on the knife groove tube. A rectangular plate on the right, the upper rectangular plate, the lower rectangular plate, and two square plates at each end are welded together to form a single unit. Small shafts are welded to both ends of this unit for easy rotation. After installing the cover plate on the left side, the knife groove tube is then installed on the cover plate, completing the installation of the paper-cutting knife mechanism 1. The pull rod 2 and the paper-cutting knife are installed at the extended end of the cylinder 3. The cylinder 3 is electrically connected to a solenoid valve 4. The cylinder 3 is connected to an air tank, and the air stored in the air tank enters the cylinder 3 through the solenoid valve. The solenoid valve 4 is electrically connected to the main control system, and the main control system is electrically connected to the paper-cutting detection mechanism. The paper breakage detection mechanism includes a transmitter and a receiver, with a paper strip located between the transmitter and the receiver, which are spaced apart in a direction perpendicular to the paper strip. Based on Embodiment 6, this embodiment... Figure 2 As shown, the receiver includes a photosensitive sensor 8, which acquires information from the paper tape and is electrically connected to the host control system.

[0024] The working principle of the paper-cutting knife device in the printing unit of a web-fed printing press is as follows: when the paper tape breaks, the paper breakage detection device sends a paper breakage signal, and the paper-cutting knife mechanism 1 cuts the paper tape 9, ensuring that the number of paper tape layers wrapped around the cylinder is controlled within 10 layers to prevent paper tape accumulation and tangling, and to prevent the broken paper tape from being rolled into the cylinder. This paper-cutting knife device in the printing unit of a web-fed printing press has good stability and high reliability, improving printing quality and efficiency.

[0025] The working process of the paper-cutting knife device of the printing unit of the roll paper printing machine is as follows: the paper belt movement trajectory includes the paper outlet and the paper inlet. The paper belt 9 is conveyed along the paper feed roller 7. When the paper belt 9 breaks, the photosensitive sensor 8 detects the paper break and sends a paper break signal to the host control system. The host system sends a command to the solenoid valve 4, which controls the cylinder 3 to extend and drive the pull rod 2 to move. The paper-cutting knife 1 falls into the knife groove, and the paper belt 9 cuts 6 slits. Under the tension of the paper belt 9, the paper belt 9 breaks instantly.

[0026] This utility model relates to a paper-cutting knife device for the printing unit of a roll-to-roll printing press. It has a simple structure, is easy to use, and has low manufacturing cost. The paper-cutting knife mechanism is a standard module in newly manufactured machines. For machines that have already been sold, it can be directly upgraded and optimized for use on commercial rotary printing presses. It provides efficient support for the high speed and high intelligence of the printing press, enhances product performance, provides a selling point for the printing press, and has high economic benefits.

Claims

1. A paper-cutting knife device for a printing unit of a web-based printing press, characterized in that, Includes a support (6), which is set between the printing press and the folding machine, and between the printing press and the printing press. The two ends of the support (6) are tightly held at the two ends of the paper feed roller (7). A connecting shaft is fixedly set in the middle of the paper feed roller (7). Bearings are set between the two ends of the connecting shaft and the roller body of the paper feed roller (7). The roller body of the paper feed roller (7) is used to guide the paper strip (9). The rotation of the roller body of the paper feed roller (7) is achieved by the friction force between the paper strip (9) and the surface of the roller body. A paper cutter mechanism (1) is set on the support (6). The paper cutter mechanism cuts the paper strip (9). A paper break detection mechanism is set at the paper output end of the printing press. The paper feed roller (7) is located on the side close to the paper break detection mechanism. The paper break detection mechanism is used to detect the paper breakage in real time and issue a paper breakage signal when the paper strip (9) breaks.

2. The paper cutter device for a web-fed printing press printing unit according to claim 1, characterized in that, The paper-cutting knife mechanism (1) includes a paper-cutting knife, a knife holder (5), and a knife groove tube. The knife holder includes three rectangular plates welded on three sides, two square plates welded on both ends, and a cover plate. The cylinder (3) of the paper-cutting knife is fixed inside the upper rectangular plate. A pull rod groove for the pull rod (2) is opened on the lower rectangular plate. Several knife grooves for the paper-cutting knife are opened on the knife groove tube. A rectangular plate on the right, a rectangular plate on the upper side, a rectangular plate on the lower side, and two square plates at both ends are welded into a whole. Small shafts are welded to both ends of the whole for easy rotation. After the cover plate is installed on the left side, the knife groove tube is installed on the cover plate to complete the installation of the paper-cutting knife mechanism (1).

3. The paper cutter device for a web-fed printing press printing unit according to claim 2, characterized in that, The pull rod (2) and the paper cutter are installed at the extended end of the cylinder (3).

4. The paper cutter device for a web-fed printing press printing unit according to claim 3, characterized in that, The cylinder (3) is electrically connected to the solenoid valve (4), and the cylinder (3) is connected to the air storage tank. The air source stored in the air storage tank enters the cylinder (3) through the solenoid valve (4).

5. The paper cutter device for a web-fed printing press printing unit according to claim 4, characterized in that, The solenoid valve (4) is electrically connected to the host control system, and the host control system is electrically connected to the paper breakage detection mechanism.

6. The paper cutter device for a web-fed printing press printing unit according to claim 5, characterized in that, The paper breakage detection mechanism includes a transmitter and a receiver, with a paper strip (9) located between the transmitter and the receiver, and the transmitter and the receiver are spaced apart in a direction perpendicular to the paper strip (9).

7. The paper cutter device for a web-fed printing press printing unit according to claim 6, characterized in that, The transmitter includes a light source, and the receiver includes a photosensitive sensor (8), which acquires information from the paper tape (9).

8. The paper cutter device for a web-fed printing press printing unit according to claim 7, characterized in that, The photosensitive sensor (8) is electrically connected to the host control system.

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