A shaftless plate-mounting component for a printing press

Abstract

This utility model discloses a shaftless plate mounting component for a printing press, including a printing press frame, positioning mechanisms, a shaftless plate roller, an adjusting seat, and a cylinder. Two positioning mechanisms are arranged opposite each other on the left and right sides. One positioning mechanism is rotatably connected to the right side wall of the printing press frame, and the other is rotatably connected to the adjusting seat. The shaftless plate roller is detachably mounted between the two positioning mechanisms. The cylinder is fixed to the left side of the printing press frame, and its piston rod is fixed to the adjusting seat. The positioning mechanism includes a support shaft, a positioning baffle, an expansion air bladder, an air pipe, a valve, and a quick-connect fitting. This utility model, through the cooperation of the opposite positioning mechanisms with the cylinder and adjusting seat, achieves convenient disassembly and stable mounting of the shaftless plate roller. After inflation, the expansion air bladder tightly presses against the inner wall of the shaftless plate roller from the inside, absorbing vibration and improving the roller's operational stability, while also sealing to prevent dust from entering the roller's interior.

Description

Technical Field

[0001] This utility model relates to the field of printing press technology, and in particular to a shaftless plate mounting component for a printing press. Background Technology

[0002] In the field of printing presses, shaftless plate mounting components are the core components for achieving rapid disassembly and precise positioning of printing plate rollers. They mainly use a non-long shaft through-type structure to fix and drive the shaftless plate roller, in order to meet the modern printing requirements for plate changing efficiency and registration accuracy. They are widely used in various printing equipment such as gravure and flexographic printing.

[0003] Most shaftless plate-mounting components for printing presses currently on the market rely on rigid structures (such as conical ejector pins and mechanical grippers) to center and clamp the plate roller. While these structures can meet basic plate-mounting requirements, they have significant drawbacks: firstly, rigid contact cannot effectively absorb the vibrations generated by the high-speed rotation of the plate roller during printing, affecting stability; secondly, tiny gaps easily exist between the rigid structure and the inner wall of the plate roller, allowing ink mist, dust, and other impurities generated during printing to easily enter the interior of the plate roller through these gaps, contaminating the inner wall and plate-mounting components. This increases subsequent cleaning and maintenance costs and may also affect plate-mounting stability due to impurities getting stuck. Therefore, there is an urgent need to develop a shaftless plate-mounting component for printing presses that uses a left-right opposing positioning mechanism in conjunction with a cylinder and adjusting seat to achieve convenient disassembly, assembly, and stable fixation of the shaftless plate roller; and an inflatable airbag that, when inflated, tightly presses against the inner wall of the shaftless plate roller from the inside, absorbing vibrations and improving the plate roller's operational stability, while also sealing to prevent dust from entering the interior of the plate roller. This would overcome the shortcomings of current practical applications and meet current needs. Utility Model Content

[0004] The purpose of this invention is to provide a shaftless plate mounting component for a printing press to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A shaftless plate mounting component for a printing press includes a printing press frame, a positioning mechanism, a shaftless plate roller, an adjusting seat, and a cylinder. Two positioning mechanisms are arranged opposite each other, one rotatably connected to the right side wall of the printing press frame and the other rotatably connected to the adjusting seat. The shaftless plate roller is detachably mounted between the two positioning mechanisms. The cylinder is fixed to the left side of the printing press frame, and its piston rod is fixed to the adjusting seat. Each positioning mechanism includes a support shaft, a positioning baffle, an expansion airbag, an air pipe, a valve, and a quick-connect fitting. The positioning baffle is fixed to the support shaft and blocks the end of the shaftless plate roller. The expansion airbag is fixed to the support shaft and is connected to the air pipe, which passes through the inside of the support shaft. A valve is installed on the air pipe, and a quick-connect fitting is fixedly connected to the top of the air pipe.

[0006] Preferably, the front end of the support shaft is chamfered.

[0007] Preferably, the inflatable airbag is made of hydrogenated nitrile rubber.

[0008] Preferably, the bottom of the adjusting seat has two sliders fixed, and the left side of the printing machine frame has two guide rails fixed, with each slider slidably mounted on one guide rail.

[0009] The beneficial effects of this utility model are as follows: When installing this shaftless plate mounting component for a printing press, first insert the shaftless plate roller onto the support shaft on the right side of the printing press frame. Then, insert the support shaft into the shaftless plate roller and ensure the positioning baffle presses against the edge of the shaftless plate roller. Next, connect the external high-pressure air source connector to the quick-connect pipe connector, open the valve, and inflate the expansion bladder with air from the external air source, causing the expansion bladder to press tightly against the inner wall of the shaftless plate roller from the inside. Then, close the valve, disconnect the external air source connector, and then move the adjusting seat and positioning mechanism to the right via the cylinder, so that the other... One support shaft is gradually inserted into the left end of the shaftless printing roller, and the positioning baffle presses against the edge of the shaftless printing roller. Similarly, the other expansion airbag is inflated. The expansion airbag can absorb vibration, improve the stability of the shaftless printing roller during operation, and improve sealing to prevent dust from entering the shaftless printing roller. During disassembly, first open the valve to allow the expansion airbag to vent and contract. Then, the cylinder drives the adjusting seat and positioning mechanism to move to the left, separating the positioning mechanism on the left side of the shaftless printing roller from it. Then, the shaftless printing roller can be pulled off the positioning mechanism on its right side. In summary, this utility model achieves convenient disassembly and stable fixation of the shaftless printing roller through the cooperation of the left and right opposing positioning mechanisms, cylinders, and adjusting seats. After inflation, the expansion airbag can tightly press against the inner wall of the shaftless printing roller from the inside, which not only absorbs vibration and improves the stability of the printing roller during operation, but also seals to prevent dust from entering the printing roller. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0011] Figure 2 This is a schematic diagram of the disassembled state of this utility model.

[0012] Figure 3 This is a partial structural schematic diagram of the present invention.

[0013] Figure 4 This is an internal cross-sectional view of the positioning mechanism in this utility model.

[0014] Legend: 1. Printing press frame; 2. Positioning mechanism; 201. Support shaft; 2011. Chamfer; 202. Positioning baffle; 203. Inflatable airbag; 204. Air pipe; 205. Valve; 206. Quick-connect tube connector; 3. Shaftless printing roller; 4. Adjusting seat; 5. Cylinder; 6. Slider; 7. Guide rail. Detailed Implementation

[0015] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] Specific implementation examples are given below.

[0017] See Figures 1-4 In this embodiment of the present invention, a shaftless plate mounting component for a printing machine includes a printing machine frame 1, a positioning mechanism 2, a shaftless plate roller 3, an adjusting seat 4, and a cylinder 5. The positioning mechanism 2 consists of two mechanisms arranged opposite each other on the left and right sides. One positioning mechanism 2 is rotatably connected to the right side wall of the printing machine frame 1, and the other positioning mechanism 2 is rotatably connected to the adjusting seat 4. The shaftless plate roller 3 is detachably mounted between the two positioning mechanisms 2. The cylinder 5 is fixed to the left side of the printing machine frame 1, and the piston rod of the cylinder 5 is fixed to the adjusting seat 4. The cylinder 5 is supplied with air from an external high-pressure air source. During disassembly, the cylinder 5 drives the adjusting seat 4 and the positioning mechanism 2 to move to the left, separating the positioning mechanism 2 on the left side of the shaftless plate roller 3 from it. Then, the shaftless plate roller 3 can be pulled off from the positioning mechanism 2 on its right side.

[0018] The positioning mechanism 2 includes: a support shaft 201, a positioning baffle 202, an inflatable airbag 203, an air pipe 204, a valve 205, and a quick-connect fitting 206. The positioning baffle 202 is fixed to the support shaft 201 and is used to block the end of the shaftless printing roller 3. The front end of the support shaft 201 is provided with a chamfer 2011, which guides the insertion of the support shaft 201 into the shaftless printing roller 3. The inflatable airbag 203 is fixed to the support shaft 201 and is fixed to and connected to the air pipe 204. The air pipe 204 passes through the inside of the support shaft 201, and a valve 205 is installed on the air pipe 204. The top of 4 is fixedly connected with a quick-connect fitting 206, which is used to quickly connect to an external air source fitting. Before installing the shaftless printing roller 3, the expansion air bladder 203 is in a deflated state. During installation, first insert the support shaft 201 into the shaftless printing roller 3 and make the positioning baffle 202 press against the edge of the shaftless printing roller 3. Then, connect the external high-pressure air source fitting to the quick-connect fitting 206, open the valve 205, and inflate the expansion air bladder 203 with air from the external air source to make it expand. This allows the expansion air bladder 203 to press tightly against the inner wall of the shaftless printing roller 3 from the inside. The expansion air bladder 203 can absorb vibration, improve the stability of the shaftless printing roller 3 during operation, and improve the seal to prevent dust from entering the interior of the shaftless printing roller 3.

[0019] The inflatable airbag 203 is made of hydrogenated nitrile rubber, which gives it good elasticity and makes it resistant to commonly used printing solvents such as benzene, esters and ketones (e.g. ethyl acetate and toluene). It does not swell or crack after long-term contact with ink.

[0020] Two sliders 6 are fixed to the bottom of the adjustment seat 4, and two guide rails 7 are fixed to the left side of the printing machine frame 1. Each slider 6 is slidably mounted on a guide rail 7, and the adjustment seat 4 is stably supported by the guide rails 7 and the sliders 6.

[0021] Working principle: During installation of the shaftless plate mounting component of this printing press, first insert the shaftless plate roller 3 onto the support shaft 201 on the right side of the printing press frame 1. Insert the support shaft 201 into the shaftless plate roller 3 and ensure the positioning baffle 202 presses against the edge of the shaftless plate roller 3. Then, connect the external high-pressure air source connector to the quick-connect pipe connector 206, open the valve 205, and inflate the expansion air bladder 203 through the external air source to make it expand, so that the expansion air bladder 203 presses tightly against the inner wall of the shaftless plate roller 3 from the inside. Then, close the valve 205, disconnect the external air source connector, and then, through the cylinder 5, drive the adjusting seat 4 and the positioning mechanism 2 to move to the right, so that the other support... The support shaft 201 is gradually inserted to the left end of the shaftless printing roller 3 and the positioning baffle 202 is pressed against the edge of the shaftless printing roller 3. Similarly, the other expansion airbag 203 is inflated. The expansion airbag 203 can absorb vibration, improve the stability of the shaftless printing roller 3 during operation, and improve sealing to prevent dust from entering the shaftless printing roller 3. When disassembling, first open the valve 205 to allow the expansion airbag 203 to vent and contract. Then, the cylinder 5 drives the adjusting seat 4 and the positioning mechanism 2 to move to the left, so that the positioning mechanism 2 on the left side of the shaftless printing roller 3 is separated from it. Then, the shaftless printing roller 3 can be pulled off the positioning mechanism 2 on its right side.

[0022] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A shaftless plate-mounting component for a printing press, characterized in that, The printing press includes a printing press frame (1), a positioning mechanism (2), a shaftless printing roller (3), an adjusting seat (4), and a cylinder (5). There are two positioning mechanisms (2) arranged opposite each other. One positioning mechanism (2) is rotatably connected to the right side wall of the printing press frame (1), and the other positioning mechanism (2) is rotatably connected to the adjusting seat (4). The shaftless printing roller (3) is detachably installed between the two positioning mechanisms (2). The cylinder (5) is fixed to the left side of the printing press frame (1), and the piston rod of the cylinder (5) is fixed to the adjusting seat (4). The positioning mechanism (2) includes a support shaft (201) and a positioning baffle. (202), inflatable airbag (203), air tube (204), valve (205) and quick-connect tube connector (206), a positioning baffle (202) is fixed on the support shaft (201), the positioning baffle (202) is used to block the end of the shaftless roller (3), the inflatable airbag (203) is fixed on the support shaft (201), the inflatable airbag (203) is fixed and connected to the air tube (204), the air tube (204) passes through the inside of the support shaft (201), a valve (205) is installed on the air tube (204), and a quick-connect tube connector (206) is fixedly connected to the top of the air tube (204).

2. The shaftless plate-mounting component for a printing press according to claim 1, characterized in that, The front end of the support shaft (201) is provided with a chamfer (2011).

3. The shaftless plate-mounting component for a printing press according to claim 1, characterized in that, The inflatable airbag (203) is made of hydrogenated nitrile rubber.

4. The shaftless plate-mounting component for a printing press according to claim 1, characterized in that, Two sliders (6) are fixed at the bottom of the adjustment seat (4), and two guide rails (7) are fixed on the left side of the printing machine frame (1). Each slider (6) is slidably mounted on a guide rail (7).

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