Roller adjusting device for flat plate offset press

Abstract

The utility model discloses a roller adjusting device for a flat-plate offset press, which belongs to the technical field of flat-plate offset presses and comprises a flat-plate offset press frame for supporting a roller for the flat-plate offset press, adjusting grooves are arranged on two sides of the flat-plate offset press frame, and moving blocks are slidably connected in the adjusting grooves. An impression cylinder for offset lithography is rotatably connected to the interior of the moving block, a hollow column is welded to the top of the moving block, a spring is arranged in the hollow column, a contact is installed on the inner bottom wall of the hollow column, one end of the spring is connected with a moving disc, and the moving disc slides in the hollow column; according to the device, the automatic compensation capacity of the adjusting gap can be improved, deviation of the relative position of the roller caused by gap change is prevented, front and back printed patterns can coincide more accurately, and overprinting is more accurate.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of flat plate offset press, especially a cylinder adjusting device for flat plate offset press. BACKGROUND

[0002] The flat plate offset press is a kind of widely used printing equipment, and its working principle is mainly that ink on the plate is transferred to the printing material by the mutual cooperation between plate cylinder, rubber cylinder and impression cylinder.In the printing process, in order to ensure the printing quality, the pressure, position and other parameters between the cylinders need to be accurately adjusted, and the traditional cylinder adjusting device for flat plate offset press can meet the basic adjustment requirement, but the automatic compensation ability of the cylinder adjusting gap is weak, and the gap change will cause the deviation of the relative position of the cylinder, so that the patterns printed before and after cannot be accurately overlapped, and the overprint is inaccurate.

[0003] Through the search, the utility model discloses a kind of cylinder adjusting device for flat plate offset press, including first bottom plate, cylinder body, second bottom plate, second roller frame and first roller frame, the middle of first connecting shaft is fixed in the one end of cylinder body, the one end of first connecting shaft is rotatably installed on first roller frame, the middle of first bottom plate upper surface is fixed with screw rod frame, screw rod frame is rotatably installed with screw rod in, screw rod is screw mounted with nut, the top end of nut is fixed with the bottom end of first roller frame, the connecting plate is slidably installed on track, the upper surface of connecting plate is fixed with the bottom end of second roller frame.The utility model has the advantage that the position of cylinder body is adjusted in real time according to actual use condition, the device can meet the basic adjustment requirement, but the automatic compensation ability of the cylinder adjusting gap is weak, and the gap change will cause the deviation of the relative position of the cylinder, so that the patterns printed before and after cannot be accurately overlapped, and the overprint is inaccurate. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of cylinder adjusting device for flat plate offset press to solve the problems raised in the background art.

[0005] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme: a cylinder adjusting device for flat plate offset press, including flat plate offset press frame for supporting the cylinder of flat plate offset press, both sides of flat plate offset press frame are provided with adjusting groove, sliding connection has moving block in the inside of adjusting groove, the inside rotationally connected with the platen cylinder for flat plate offset printing of moving block, the top of moving block is welded with hollow column, the inside of hollow column is provided with spring, the inner bottom wall of hollow column is installed with contact, one end of spring is connected with moving disc, moving disc slides in the inside of hollow column, the top of moving disc is connected with connecting rod, the bottom of moving disc is provided with cooperation groove matched with contact.

[0006] Preferably, the end of the connecting rod away from the moving disc is welded with a moving plate, the side of the flat plate offset press frame is welded with a fixed table, and two guide rods are symmetrically welded on the top of the fixed table.

[0007] Preferably, the outer periphery of the two guide rods is provided with a sliding groove, and a locking disc is slidably installed in the inside of the sliding groove.

[0008] Preferably, the end of the threaded rod away from the locking disc is provided with a handle, and a limiting disc is installed on the top of the guide rod.

[0009] Preferably, the inside of the fixed table is rotationally connected with an adjusting screw rod for adjusting, and the end of the adjusting screw rod away from the fixed table is provided with an adjusting handle for rotation.

[0010] Preferably, the side of the flat plate offset press frame is provided with a power part, the output end of the power part is engaged with two driven gears, and the side of the two driven gears is provided with a plate cylinder for flat plate offset press.

[0011] Compared with the prior art, the utility model has the following technical effects and advantages:

[0012] The cylinder adjusting device for flat plate offset press, thanks to the structure of the spring and the moving disc, the moving plate drives the connecting rod to extrude the moving disc, the moving disc extrudes the spring, and the spring extrudes the moving block, thereby increasing the contact pressure of the platen cylinder and the paper. Due to the action of the spring, the platen cylinder can adapt to the pressure of the paper. Compared with the traditional cylinder adjusting device for flat plate offset press, the automatic compensation ability of the adjusting gap is weak. The structure can improve the automatic compensation ability of the adjusting gap, prevent the relative position of the cylinder from deviating due to the change of the gap, and make the patterns printed before and after more accurately coincide, so that the overprint is more accurate.

[0013] The roller adjusting device for the flat plate offset printing machine, thanks to the structure of the contact and the matching groove, when the pressure is too large, the contact is in contact with the matching groove, a warning signal can be sent to remind the operator to check the equipment, and the sensor feedback effect is achieved.

[0014] The roller adjusting device for the flat plate offset printing machine, thanks to the structure of the locking disc, when the position of the impression cylinder is adjusted, the handle is rotated, the handle drives the locking disc to be in contact with the sliding groove, finally the locking disc is locked with the sliding groove, the position of the moving plate is prevented from being unstable, and the stability of the offset printing is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the specific embodiment of the present application or the technical scheme in the prior art, the drawings needed to be used in the specific embodiment or the prior art description will be briefly introduced as follows. Obviously, the drawings described in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0016] Figure 1 It is a structural schematic view of the present application;

[0017] Figure 2 It is a sectional view of the present application;

[0018] Figure 3 It is a structural schematic view of the adjusting plate of the present application;

[0019] Figure 4 It is an enlarged view of the present application Figure 3 A;

[0020] Figure 5 It is an enlarged view of the present application Figure 3 B.

[0021] Marked in the drawing:

[0022] In the drawing: 1, flat plate offset printing machine frame; 101, adjusting groove; 102, power part; 103, driven gear; 104, plate cylinder; 2, fixed table; 201, guide rod; 202, limiting disc; 203, sliding groove; 204, locking disc; 205, threaded rod; 206, handle; 207, moving plate; 208, adjusting handle; 209, adjusting screw; 210, connecting rod; 3, moving block; 301, impression cylinder; 302, hollow column; 303, spring; 304, moving disc; 305, contact; 306, matching groove. DETAILED DESCRIPTION

[0023] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0024] The connection method can be any existing method, such as bonding, welding, or bolting, depending on the actual needs.

[0025] like Figures 1 to 5 The illustrated roller adjustment device for a flatbed offset printing machine includes a flatbed offset printing machine frame 1 for supporting the rollers of the flatbed offset printing machine. Adjustment grooves 101 are provided on both sides of the flatbed offset printing machine frame 1. A movable block 3 is slidably connected inside the adjustment groove 101. An impression roller 301 for flatbed offset printing is rotatably connected inside the movable block 3. A hollow column 302 is welded to the top of the movable block 3. A spring 303 is installed inside the hollow column 302. A contact point 305 is installed on the inner bottom wall of the hollow column 302. One end of the spring 303 is connected to a movable disk 304, which slides inside the hollow column 302. The top of the device is connected to a connecting rod 210, and the bottom of the movable disk 304 is provided with a mating groove 306 that cooperates with the contact point 305. The movable plate 207 drives the connecting rod 210 to squeeze the movable disk 304, the movable disk 304 squeezes the spring 303, and the spring 303 squeezes the movable block 3, thereby increasing the contact pressure between the impression cylinder 301 and the paper. Due to the action of the spring 303, the impression cylinder 301 can adapt to the pressure of the paper, and the automatic compensation capability of the adjustment gap is improved. When the pressure is too high, the contact point 305 contacts the mating groove 306, which can issue a warning signal to remind the operator to check the equipment, thus playing the role of sensor feedback.

[0026] The working principle of the mating groove 306 with contact 305 can be found in (Working Principle of Displacement and Pressure Sensor). This sensor can monitor the position changes of the roller in real time and feed the signal back to the control system. The control system compares the feedback signal with the set value and automatically adjusts the motor rotation to ensure the roller accurately reaches the set position. The pressure sensor monitors the pressure between the rollers.

[0027] The end of the connecting rod 210 away from the moving disc 304 is welded with a moving plate 207, the side of the flat plate offset printing machine frame 1 is welded with a fixed table 2, the top of the fixed table 2 is symmetrically welded with two guide rods 201, the outer periphery of the two guide rods 201 is provided with a sliding groove 203, the inside of the sliding groove 203 is slidably installed with a locking disc 204, the side of the locking disc 204 is connected with a threaded rod 205, the end of the threaded rod 205 away from the locking disc 204 is installed with a handle 206, the top of the guide rod 201 is installed with a limiting disc 202, when the position of the impression cylinder 301 is adjusted, the handle 206 is rotated, the handle 206 drives the locking disc 204 to contact with the sliding groove 203, finally the locking disc 204 is locked with the sliding groove 203, preventing the position of the moving plate 207 from being unstable, ensuring the stability of the offset printing.

[0028] The inside of the fixed table 2 is rotatably connected with an adjusting screw rod 209 for adjustment, the end of the adjusting screw rod 209 away from the fixed table 2 is installed with an adjusting handle 208 for rotation, the adjusting handle 208 is operated by rotating the adjusting handle 208 to drive the subsequent transmission mechanism, so as to realize the adjustment of the position of the impression cylinder 301. The design of the adjusting handle usually considers ergonomics, convenient to hold and force, for example, the surface has anti-skid texture, to prevent hand slipping during operation, when the contact pressure of the impression cylinder 301, the plate cylinder 104 and the paper needs to be adjusted, the adjusting handle 208 is rotated, the adjusting handle 208 drives the adjusting screw rod 209 to rotate, the adjusting screw rod 209 drives the moving plate 207 to move downward along the guide rod 201.

[0029] The side of the flat plate offset printing machine frame 1 is installed with a power part 102, the power part 102 works with a servo motor or a stepping motor cooperating with a controller, which can accurately control the angle and speed of rotation. The power output of the motor can be transmitted to the transmission mechanism through the coupling and other components, realizing the automatic adjustment of the cylinder, the controller is used to control the operation of the motor, the operator can input the required adjustment parameters such as the adjustment distance, speed, etc. through the controller, the controller controls the rotation of the motor according to the input parameters, so as to realize accurate adjustment, the output end of the power part 102 is engaged with two driven gears 103, the side of the two driven gears 103 is installed with a plate cylinder 104 for flat plate offset printing machine, the paper to be offset printed is inserted between the plate cylinder 104 and the impression cylinder 301, the power part 102 is started, the power part 102 drives the driven gear 103 to rotate, the driven gear 103 drives the plate cylinder 104 to rotate, and the entering paper is transferred and printed.

[0030] Working principle

[0031] The cylinder adjusting device for the flat plate offset printing machine, when in use, firstly, the paper to be offset printed is inserted between the plate cylinder 104 and the impression cylinder 301, the power part 102 is started, the power part 102 drives the driven gear 103 to rotate, the driven gear 103 drives the plate cylinder 104 to rotate, and the entering paper is transferred and printed, when the contact pressure of the impression cylinder 301, the plate cylinder 104 and the paper needs to be adjusted, the adjusting handle 208 is rotated, the adjusting handle 208 drives the adjusting screw 209 to rotate, the adjusting screw 209 drives the moving plate 207 to move downwards along the guide rod 201, the moving plate 207 drives the connecting rod 210 to press the moving disc 304, the moving disc 304 presses the spring 303, the spring 303 presses the moving block 3, so that the contact pressure of the impression cylinder 301 and the paper is increased, due to the action of the spring 303, the impression cylinder 301 can be self-adaptive to the pressure of the paper, the automatic compensation ability of the adjusting gap is improved, when the pressure is too large, the contact point 305 is in contact with the matched groove 306, a warning signal can be sent to remind the operator to check the equipment, the sensor feedback function is realized, when the position of the impression cylinder 301 is adjusted, the handle 206 is rotated, the handle 206 drives the locking disc 204 to be in contact with the sliding groove 203, finally, the locking disc 204 is locked with the sliding groove 203, the position of the moving plate 207 is prevented from being fixed unstably, and the stability of the offset printing is ensured.

[0032] It should be noted that, in this document, relational terms such as one and the other and at least one of are used solely to distinguish one entity or action from another entity or action, without necessarily requiring or implying that each modified entity or action must exist separately from another entity or action.

[0033] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A cylinder adjustment device for a flatbed printing press, comprising a flatbed printing press frame (1) for supporting a cylinder for a flatbed printing press, characterized in that: Both sides of the flat plate printing frame (1) are provided with adjusting grooves (101), the inside of the adjusting grooves (101) is slidably connected with moving blocks (3), the inside of the moving blocks (3) is rotatably connected with printing cylinders (301) for flat plate printing, the top of the moving blocks (3) is welded with hollow columns (302), the inside of the hollow columns (302) is provided with springs (303), the inner bottom wall of the hollow columns (302) is mounted with contact points (305), one end of the springs (303) is connected with moving discs (304), the moving discs (304) slide in the inside of the hollow columns (302), the top of the moving discs (304) is connected with connecting rods (210), the bottom of the moving discs (304) is provided with matching grooves (306) matched with the contact points (305).

2. A cylinder conditioning device for a lithographic printing press according to claim 1, characterized in that: The end, away from the moving disc (304), of the connecting rod (210) is welded with moving plates (207), the side of the flat plate printing frame (1) is welded with fixed benches (2), the top of the fixed benches (2) is symmetrically welded with two guide rods (201).

3. A cylinder conditioning device for a lithographic printing press according to claim 2, characterized in that: The outer periphery of the two guide rods (201) is provided with sliding grooves (203), the inside of the sliding grooves (203) is slidably mounted with locking discs (204), the side of the locking discs (204) is connected with threaded rods (205).

4. A cylinder conditioning device for a lithographic printing press according to claim 3, characterized in that: The end, away from the locking disc (204), of the threaded rods (205) is mounted with handles (206), the top of the guide rods (201) is mounted with limiting discs (202).

5. A cylinder conditioning device for a lithographic printing press according to claim 2, characterized in that: The inside of the fixed benches (2) is rotatably connected with adjusting screws (209) for adjusting, the end, away from the fixed benches (2), of the adjusting screws (209) is mounted with adjusting handles (208) for rotating.

6. A cylinder conditioning device for a lithographic printing press according to claim 1, characterized in that: The side of the flat plate printing frame (1) is mounted with power parts (102), the output end of the power parts (102) is engagedly connected with two driven gears (103), the side of the two driven gears (103) is mounted with printing plate cylinders (104) for flat plate printing machines.

Images