Double-lifting swing arm type offset printing mechanism

Abstract

The invention relates to a double-lifting swing arm type offset printing mechanism which is characterized in that a printing roller station, a first lifting swing arm and a second lifting swing arm are arranged on a rack, a first mounting part for mounting a transfer printing roller is arranged on the first lifting swing arm, a second mounting part for mounting a printing roller is arranged on the second lifting swing arm, and the printing roller station is arranged above the first mounting part; the second mounting portion is disposed below the first mounting portion. A double-lifting swing arm structure is adopted, a transfer printing roller and a printing roller can be assembled, the corresponding transfer printing roller and the printing roller are lifted and lowered in a swing lifting mode, a large operation space can be vacated for assembly after the transfer printing roller and the printing roller swing and are separated from each other along with corresponding swing arms, the space occupied by the double-lifting swing arm structure is relatively compact, and the disassembly and assembly convenience of all the rollers is improved; the assembly of transfer rollers with different sizes and diameters and the like is met, the operation is stable, the size of the closing pressure is relatively convenient to debug and is not easy to interfere with each other when the closing pressure and the separating pressure are separated, and the closing pressure is lifted upwards and is not easy to conflict during the closing pressure.

Description

Technical Field

[0002] The invention relates to an offset printing mechanism in a printing device. Background Art

[0003] The offset printing mechanism in the printing equipment has a plate roller, a transfer roller and a bottom roller (i.e., a printing roller) to cooperate with the offset printing work, wherein the transfer roller is arranged between the plate roller and the bottom roller. The plate roller and the transfer roller are required for printing, and the transfer roller and the bottom roller are kept in a pressed and rolling state in sequence. When the substrate (such as roll paper) is continuously printed without retraction, in order to adapt to the layout patterns of different length units, it is necessary to replace the plate roller (such as its roller) of different diameter sizes, and for this purpose, it is also necessary to replace the transfer roller (such as its roller) of matching specifications. The convenience of disassembly and assembly of each roller is very important; in addition, during the printing process of the substrate, each roller is kept in a pressed state in sequence, and the pressing pressure needs to be adjusted to a suitable pressure to ensure the printing effect, and they need to be separated and depressed (i.e., disengaged) when paused. In addition, the overall equipment using a horizontal movable separation structure occupies a relatively large space and has poor operating stability. Summary of the invention

[0004] In view of the technical problems existing in the background technology, the technical problem solved by the present invention is to provide a double lifting swing arm type offset printing mechanism.

[0005] In order to solve the above technical problems, the present invention adopts the following technical scheme: a double-lifting swing arm offset printing mechanism, characterized in that: a plate roller station, a first lifting swing arm and a second lifting swing arm are provided on its frame, the first lifting swing arm is provided with a first mounting portion for installing a transfer roller, the first swing support axis of the first lifting swing arm is located at the rear side of the first mounting portion, the second lifting swing arm is provided with a second mounting portion for installing a printing roller, the second swing support axis of the second lifting swing arm is located at the rear side of the second mounting portion, the plate roller station is arranged above the first mounting portion, the second mounting portion is arranged below the first mounting portion, the first swing support axis and the second swing support axis are both arranged horizontally left and right, and the first swing support axis and the second swing support axis are arranged coaxially or axially.

[0006] The following various optimizations or supplementary explanations can be made on the above technical solutions respectively.

[0007] It also includes a swing driving structure, a first lifting swing arm and a second lifting swing arm which are transmission-connected to the swing driving structure.

[0008] For example, the swing drive structure includes a first transmission drive device, which includes a lifting seat, a lifting drive device, a first transmission shaft, a second transmission shaft, a transmission arm and a first rotary clutch eccentric sleeve. The lifting seat is transmission-connected to the lifting drive device, the first transmission shaft is arranged on the lifting seat, the second transmission shaft is arranged on the first lifting swing arm, one end of the transmission arm is connected to the first transmission shaft, and the other end of the transmission arm is connected to the second transmission shaft; a first rotary clutch eccentric sleeve is also arranged between the transmission arm and the first transmission shaft and / or the second transmission shaft, the first rotary clutch eccentric sleeve is transmission-connected to a corresponding first rotary drive device, the corresponding first rotary drive device is arranged on the lifting seat and / or the corresponding first rotary drive device is arranged on the first lifting swing arm.

[0009] One end of the first lifting swing arm is connected to the first support shaft, the second transmission shaft is located at the other end of the first lifting swing arm, the axis of the first support shaft is the first swing support axis, the first mounting portion is located between the first support shaft and the second transmission shaft, and the first support shaft is connected to the frame; the first lifting swing arm includes a paired left swing arm and a right swing arm, the left swing arm is provided with a roller changing port, the left swing arm is provided with a roller body support end cover, and the roller body support end cover is connected to the roller changing port; the first transmission shaft is arranged below the second transmission shaft, the first support shaft is located at the rear side of the second transmission shaft, the lifting seat is located at the front side of the second transmission shaft, and the first lifting swing arm is also provided with a first arc guide rail for swinging guide support; the lifting seat is arranged on the vertical guide rail, the vertical guide rail is arranged on the frame, the lifting drive device includes a lifting drive motor, a lifting drive screw and a lifting drive nut, the lifting drive motor is connected to the lifting drive screw, and the lifting drive screw is connected to the lifting drive nut; the lifting drive nut is installed and connected to the lifting seat; the lifting drive screw is arranged vertically.

[0010] A first rotary clutch eccentric sleeve is sleeved on the first transmission shaft, one end of the transmission arm is sleeved on the second transmission shaft, and the other end of the transmission arm is sleeved on the first rotary clutch eccentric sleeve. The first rotary drive device includes a first rotary drive cylinder, which is connected to the lifting seat. The first rotary clutch eccentric sleeve has a first connecting swing arm, which is drivingly connected to the first rotary drive cylinder.

[0011] In addition, it is optimized that the lifting seat is also connected to a first eccentric sleeve rotation limit adjustment device; the first rotation drive cylinder has a first push-pull piston rod, the first cylinder body of the first rotation drive cylinder is hingedly arranged on the lifting seat, the first push-pull piston rod is hingedly connected to the first connecting swing arm, and the first eccentric sleeve rotation limit adjustment device includes a first limit part, the first limit part is located at the head of the first limit shaft displacement adjustment rod, and the first limit shaft displacement adjustment rod is arranged on the lifting seat.

[0012] In addition, the swing drive structure includes a second transmission drive device, the second transmission drive device includes a third transmission shaft and a fourth transmission shaft, the third transmission shaft is connected to the first lifting swing arm, and the fourth transmission shaft is connected to the second lifting swing arm. The second transmission drive device also includes a distance adjusting device for adjusting the distance between the third transmission shaft and the fourth transmission shaft, the distance adjusting device includes a screw rod and nut distance adjusting transmission mechanism, and the screw rod and nut distance adjusting transmission mechanism is connected between the third transmission shaft and the fourth transmission shaft; a second rotating clutch eccentric sleeve is also provided between the distance adjusting device and the third transmission shaft and / or the fourth transmission shaft, and the second rotating clutch eccentric sleeve is transmission-connected to a corresponding second rotary drive device, and the corresponding second rotary drive device is arranged on the first lifting swing arm and / or the corresponding second rotary drive device is arranged on the second lifting swing arm.

[0013] Among them, the second rotary clutch eccentric sleeve is sleeved on the fourth transmission shaft, the screw rod and nut pitch adjustment transmission mechanism is sleeved on the second rotary clutch eccentric sleeve, the second rotary drive device includes a second rotary drive cylinder, the second rotary drive cylinder is connected to the second lifting swing arm, the second rotary clutch eccentric sleeve has a second connecting swing arm, and the second connecting swing arm is transmission connected to the second rotary drive cylinder.

[0014] Further optimization is that the second lifting swing arm is also connected with a second eccentric sleeve rotation limit adjusting device, the second rotation drive cylinder has a second push-pull piston rod, the second cylinder body of the second rotation drive cylinder is hingedly arranged on the second lifting swing arm, the second push-pull piston rod is hinged to the second connecting swing arm, the second eccentric sleeve rotation limit adjusting device includes a second limit part, the second limit part is located at the head of the second limit shaft shift adjusting rod, and the second limit shaft shift adjusting rod is arranged on the second lifting swing arm; the screw rod and nut pitch adjustment transmission mechanism includes a screw rod support seat, a transmission screw rod and a transmission nut, the transmission screw rod is arranged on the screw rod support seat, and the transmission screw rod and the transmission nut are matched for transmission connection; one of the screw rod support seat and the transmission nut is connected to the first lifting swing arm through a third transmission shaft, and the other is connected to the second lifting swing arm through a second rotary clutch eccentric sleeve and a fourth transmission shaft.

[0015] Among them, one end of the second lifting swing arm is connected to the second support shaft, the fourth transmission shaft is located at the other end of the second lifting swing arm, the axis of the second support is the second swing support axis, the second mounting portion is located between the second support shaft and the fourth transmission shaft, and the second support shaft is connected to the frame; the second support shaft is located on the rear side of the fourth transmission shaft, and the second lifting swing arm is also equipped with a second arc guide rail for swinging guide support; the second swing support axis is arranged below the first swing support axis, wherein the second swing support axis is arranged on the rear side of the first swing support axis.

[0016] The beneficial effect of the present invention is that, in the double-lifting swing arm type offset printing mechanism, a double-lifting swing arm structure is adopted, which can be used for assembling the transfer roller and the printing roller respectively, and the corresponding transfer roller and the printing roller are lifted and lowered respectively by a swinging and lifting manner, and a larger operating space can be vacated for assembly after the corresponding swing arms (first lifting swing arm, second lifting swing arm) swing and separate from each other, and the space occupied by the double-lifting swing arm structure is relatively compact, and the convenience of disassembly and assembly of each roller (transfer roller, printing roller, and even plate roller) is improved, and the assembly of transfer rollers of different sizes and diameters is satisfied, wherein the corresponding swing arms (first lifting swing arm, second lifting swing arm) are supported and swung to run more stably, and the first lifting swing arm and the second lifting swing arm move in sequence when the pressure is applied and released, and the pressure between the plate roller and the transfer roller, and between the transfer roller and the printing roller is relatively convenient to adjust and not easy to interfere with each other, and when the pressure is applied, they are all lifted upward and not easy to conflict. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following describes the relevant details and working principles of the implementation mode and embodiments of the present invention in conjunction with the accompanying drawings.

[0018] Figure 1 It is a structural schematic diagram of the present invention.

[0019] Figure 2 for Figure 1 Another annotated diagram.

[0020] Figure 3 for Figure 2 Sectional view of AA.

[0021] In the figure: 1. Transfer roller; 10. Roller shaft; 2. First lifting swing arm; 20. First supporting shaft; 21. Left swing arm; 22. Roller changing port; 23. Roller body supporting end cover; 24. Movable locking block; 3. First transmission drive device; 30. Lifting seat; 31. First transmission shaft; 32. Second transmission shaft; 33. Transmission arm; 34. Lifting drive device; 35. First rotary clutch eccentric sleeve; 36. First rotary drive device; 37. Vertical guide rail; 38. First eccentric sleeve rotation limit adjustment device; 341. lifting drive motor; 342. lifting drive screw rod; 351, first connecting swing arm; 361, first rotary drive cylinder; 3611, first push-pull piston rod; 3612, first cylinder body; 381, first limit portion; 382, ​​first limit axis displacement adjustment rod; 4. Frame; 41. First arc-shaped guide rail; 42. Second arc-shaped guide rail; 5. Second lifting swing arm; 50. Second supporting shaft; 6. Plate roller; 7. Printing roller; 8. Second transmission drive device; 80. Screw rod and nut pitch adjustment transmission mechanism; 83. Third transmission shaft; 84. Fourth transmission shaft; 85. Second rotary clutch eccentric sleeve; 86. Second rotation drive device; 88. Second eccentric sleeve rotation limit adjustment device; 801, screw support seat; 802, transmission screw; 803, transmission nut; 851, second connecting swing arm; 861, second rotary drive cylinder; 8611, second push-pull piston rod; 8612, second cylinder body; 881. A second limiting portion; 882. A second limiting axis shift adjusting rod. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the implementation mode of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0023] Referring to the accompanying drawings, in the embodiment of the present embodiment, a double lifting swing arm type offset printing mechanism is provided, and a plate roller station, a first lifting swing arm 2 and a second lifting swing arm 5 are provided on the frame 4. Among them, the first lifting swing arm 2 is provided with a first mounting portion for mounting a transfer roller 1 (such as a roller shaft 10 and a roller), and the first swing support axis of the first lifting swing arm 2 is located at the rear side of the first mounting portion. The first lifting swing arm 2 is lifted and swung around the first swing support axis to lift or lower the transfer roller 1 installed thereon. Among them, the second lifting swing arm 5 is provided with a second mounting portion for mounting a printing roller 7, and the second swing support axis of the second lifting swing arm 5 is located at the rear side of the second mounting portion. The second lifting swing arm 5 is lifted and swung around the second swing support axis to lift or lower the printing roller 7 installed thereon. Among them, the plate roller station is arranged above the first mounting portion, and when the transfer roller 1 installed at the first mounting portion is lifted or lowered with the first lifting swing arm 2, it can cooperate with the plate roller 6 at the plate roller station to perform pressing and releasing (i.e., disengaging). The second mounting portion is arranged below the first mounting portion, and the printing roller 7 (i.e., bottom roller) mounted on the second mounting portion can cooperate with the transfer roller 1 on the first mounting portion to perform pressing and releasing (i.e., disengaging) when the second lifting swing arm 5 is lifted or lowered. In addition, the first swing support axis and the second swing support axis are both arranged horizontally from left to right, and the first swing support axis and the second swing support axis are arranged coaxially or axially out of sync.

[0024] In the double-lifting swing arm offset printing mechanism, a double-lifting swing arm structure is adopted, which can be used for assembling the transfer roller 1 and the printing roller 7 respectively, and the corresponding transfer roller 1 and the printing roller 7 are lifted and lowered respectively by a swinging and lifting manner, and a larger operating space can be vacated for assembly after the corresponding swing arms (the first lifting swing arm 2 and the second lifting swing arm 5) swing and separate from each other. The space occupied by the double-lifting swing arm structure is relatively compact, and the convenience of disassembly and assembly of each roller (the transfer roller 1, the printing roller 7, and even the plate roller 6) is improved, which meets the assembly of transfer rollers 1 of different sizes and diameters, wherein the corresponding swing arms (the first lifting swing arm 2 and the second lifting swing arm 5) are supported and swung to run more stably, and the first lifting swing arm 2 and the second lifting swing arm 5 act in sequence when the pressure is applied and released, and the pressure between the plate roller 6 and the transfer roller 1, and between the transfer roller 1 and the printing roller 7 is relatively convenient to adjust and not easy to interfere with each other, and they are all lifted upward when pressed and not easy to conflict.

[0025] The following optimization or further explanation may be performed based on the above embodiments.

[0026] For example, a double lifting swing arm offset printing mechanism also includes a swing drive structure, and the first lifting swing arm 2 and the second lifting swing arm 5 are connected to the swing drive structure. That is, the first lifting swing arm 2 and the second lifting swing arm 5 are driven to swing up and down to lift and lower the transfer roller 1 or the printing roller 7 installed thereon. There are many swing drive structure methods, for example, cylinders or motors are used to drive the lifting and swinging. The swing drive structure includes a first transmission drive device 3, which is connected to the first lifting swing arm 2 in a transmission manner to cooperate with driving the first lifting swing arm 2 to lift and lower; the swing drive structure includes a second transmission drive device 8, which is connected to the second lifting swing arm 5 in a transmission manner to cooperate with driving the second lifting swing arm 5 to lift and lower.

[0027] The following optimization scheme is adopted in this embodiment: The swing drive structure includes a first transmission drive device 3 , which includes a lifting seat 30 , a lifting drive device 34 , a first transmission shaft 31 , a second transmission shaft 32 , a transmission arm 33 and a first rotary clutch eccentric sleeve 35 . The lifting seat 30 is connected to the lifting drive device 34 in a transmission connection, the first transmission shaft 31 is arranged on the lifting seat 30, and the lifting drive device 34 cooperates to drive the lifting seat 30 to lift up and down, and the first transmission shaft 31 is lifted up and down together with the lifting seat 30; the second transmission shaft 32 is arranged on the first lifting swing arm 2, and the first lifting swing arm 2 and the second transmission shaft 32 move up and down together; wherein, one end of the transmission arm 33 is connected to the first transmission shaft 31, and the other end of the transmission arm 33 is connected to the second transmission shaft 32, and the first transmission shaft 31 and the second transmission shaft 32 are connected in a transmission connection through the transmission arm 33. When the first transmission shaft 31 is lifted up and down together with the lifting seat 30, the first transmission shaft 31 can drive the second transmission shaft 32 on the first lifting swing arm 2 through the transmission arm 33 (push-pull), so that the first lifting swing arm 2 is lifted and lowered and swung around the first support shaft 20.

[0028] Among them, a first rotary clutch eccentric sleeve 35 is also provided between the transmission arm 33 and the first transmission shaft 31 and / or the second transmission shaft 32; it can be provided at one or both places; in the embodiment shown in the figure, the first rotary clutch eccentric sleeve 35 is provided at the position between the transmission arm 33 and the first transmission shaft 31. In addition, the first rotary clutch eccentric sleeve 35 is connected to the transmission arm 33 and the first transmission shaft 31. The first rotary clutch eccentric sleeve 35 is driven by the first rotary drive device 36 to rotate, so that the relative position between the transmission arm 33 and the first transmission shaft 31 and / or the second transmission shaft 32 can be changed, and the first lifting swing arm 2 and the transfer roller 1 installed thereon can swing and lift in an additional small range (matching the eccentric range of the eccentric sleeve), which can cooperate with the switching of the pressure-on and pressure-off states (with the plate roller 6) in the printing operation. Among them, the corresponding first rotation drive device 36 is arranged on the lifting seat 30 and / or the corresponding first rotation drive device 36 is arranged on the first lifting swing arm 2; for example, the first rotary clutch eccentric sleeve 35 is connected to the first transmission shaft 31, and the corresponding first rotation drive device 36 can be arranged on the lifting seat 30; for another example, the first rotary clutch eccentric sleeve 35 is connected to the second transmission shaft 32, and the corresponding first rotation drive device 36 can be arranged on the first lifting swing arm 2.

[0029] The working principle is that when the transfer roller 1 needs to be replaced or disassembled, the lifting seat 30 moves (such as descending) and drives the first lifting swing arm 2 to swing downward through the cooperation of the transmission arm 33, etc., leaving sufficient operating space on the top to facilitate the replacement and assembly of the transfer roller 1 (such as its roller), etc., and disassembly, assembly, and maintenance are relatively convenient; of course, the downward swinging of the first lifting swing arm 2 can also separate the transfer roller 1 from other structures above, so that the transfer roller 1 can be in an idle state (such as when the machine is shut down); the return action (such as rising) of the lifting seat 30 drives the first lifting swing arm 2 to swing upward through the cooperation of the transmission arm 33, etc., so that the transfer roller 1 installed on it can be close to other structures above (such as the plate roller 6, etc.) for printing operations. Among them, after the lifting seat 30 returns to its original position, the first lifting swing arm 2 also swings upward to the corresponding position with it. After that, the first rotary clutch eccentric sleeve 35 can be operated to rotate additionally, thereby driving the first lifting swing arm 2 and the transfer roller 1 installed thereon to swing and rise additionally within a small range (matching the eccentric range of the eccentric sleeve), cooperating with the switching of the pressure-release (i.e., disengagement) and pressure-applied states during the printing operation.

[0030] Driven by the first transmission drive device 3, the first lifting arm 2 can not only be driven by the lifting seat 30 to achieve a large stroke and a large range of up and down lifting and swinging, after the first lifting arm 2 swings down to the right position, sufficient operating space is left above the first lifting arm 2 to facilitate the replacement and assembly of transfer rollers 1 of different sizes, and the first lifting arm 2 can also (when the lifting seat 30 moves (such as rising) to the right position) realize a small range of swinging and lifting by the additional operation of the first rotary clutch eccentric sleeve 35, and cooperate with the switching of the transfer roller 1 in the printing operation. The pressure during the pressing and releasing state can even be adjusted according to the printing requirements by operating the rotation angle position of the first rotary clutch eccentric sleeve 35, and the pressing point can be fine-tuned to ensure the pressing pressure state. Among them, the transfer roller 1 will cooperate with the upper plate roller 6 for pressing and releasing. Among them, the lifting linear action of the lifting seat 30 is transformed to drive the up and down lifting and swinging (arc trajectory) of the first lifting swing arm 2. The lifting operation of the lifting seat 30 is relatively stable, and one end of the first lifting swing arm 2 is not only supported by the first swing support axis, but also supported and transmitted by the second transmission shaft 32. The swinging operation of the first lifting swing arm 2 is relatively stable.

[0031] It can be further optimized, one end of the first lifting swing arm 2 is connected to the first support shaft 20, the second transmission shaft 32 is located at the other end of the first lifting swing arm 2, the axis of the first support shaft 20 is the first swing support axis, the first mounting portion is located between the first support shaft 20 and the second transmission shaft 32, and the first support shaft 20 is connected to the frame 4; a support structure is formed at both ends of the first lifting swing arm 2, the up and down lifting and swinging operation of the first lifting swing arm 2 is more stable, and the operation of the transfer roller 1 is also relatively stable.

[0032] For example, the first lifting swing arm 2 includes a paired left swing arm 21 and a right swing arm. The left swing arm 21 is provided with a roller changing opening 22, and the roller changing opening 22 is used to facilitate the axial movement, replacement and assembly of the transfer roller 1 (such as its roller barrel); the left swing arm 21 is equipped with a roller body supporting end cover 23, and the roller body supporting end cover 23 is connected at the roller changing opening 22. The roller body supporting end cover 23 is used to support the transfer roller 1 (such as its roller shaft 10) at the roller changing opening 22. The roller body supporting end cover 23 can adopt a detachable structure, for example, the roller body supporting end cover 23 is hinged on the left swing arm 21 and locked by a movable locking block 24.

[0033] In addition, the first transmission shaft 31 is configured below the second transmission shaft 32. The first transmission shaft 31 can cooperate to support the second transmission shaft 32 below, and the structure is relatively more stable. The first support shaft 20 is located at the rear side of the second transmission shaft 32, and the lifting seat 30 is located at the front side of the second transmission shaft 32. The spatial structure layout is reasonable and easy to assemble. The first lifting swing arm 2 is also equipped with a first arc guide rail 41 for swinging guide support; so that the first lifting swing arm 2 can swing stably, wherein the arc guide rail can be installed on the frame 4, and the arc guide rail can be configured at the far end (i.e., the head) of the swing of the first lifting swing arm 2.

[0034] The lifting seat 30 can be arranged on the vertical guide rail 37, the vertical guide rail 37 can be installed on the frame 4, and the lifting seat 30 can be stably lifted up and down vertically. The lifting drive device 34 includes a lifting drive motor 341 (such as a servo motor, etc.), a lifting drive screw 342 and a lifting drive nut. The lifting drive motor 341 is connected to the lifting drive screw 342 in a transmission manner, and the lifting drive screw 342 is connected to the lifting drive nut in a transmission manner. The lifting drive nut is installed and connected to the lifting seat 30; the lifting drive screw 342 is arranged vertically; the lifting drive motor 341 drives the lifting drive nut to lift and lower through the lifting drive screw 342, so as to make the lifting seat 30 lift and lower on the vertical guide rail 37; its lifting drive structure operates stably, and can relatively accurately stay at the preset position, and can maintain a stable position after staying and is not easy to loosen, ensuring printing stability and being able to withstand the pressure during printing and pressing.

[0035] For example, the figure shows an embodiment of the position of the first rotary clutch eccentric sleeve 35: the first rotary clutch eccentric sleeve 35 is sleeved on the first transmission shaft 31, one end of the transmission arm 33 is sleeved on the second transmission shaft 32, and the other end of the transmission arm 33 is sleeved on the first rotary clutch eccentric sleeve 35, that is, the circular holes at both ends of the transmission arm 33 are respectively matched and sleeved on the second transmission shaft 32 and the first rotary clutch eccentric sleeve 35 to form a connecting rod transmission structure, wherein the first rotary clutch eccentric sleeve 35 is arranged between the transmission arm 33 and the first transmission shaft 31; in addition, the first rotary drive device 36 includes a first rotary drive cylinder 361, and the first rotary drive cylinder 361 is connected to the lifting and lowering cylinder 361. On the seat 30, the first rotary drive cylinder 361 rises and falls together with the lifting seat 30 and can drive the first rotary clutch eccentric sleeve 35 to rotate and change the relative position; in addition, the first rotary clutch eccentric sleeve 35 has a first connecting swing arm 351, the first connecting swing arm 351 and the first rotary clutch eccentric sleeve 35 (which can be an integrated structure or a split structure) rotate together, the first connecting swing arm 351 is connected to the first rotary drive cylinder 361 by transmission, and the first rotary drive cylinder 361 cooperates to drive the first connecting swing arm 351 to swing, thereby driving the first rotary clutch eccentric sleeve 35 to rotate (back and forth), and this structure not only has reasonable transmission, but also facilitates subsequent limit adjustment.In addition, the lifting seat 30 is also connected to a first eccentric sleeve rotation limit adjustment device 38, which limits the rotation position of the first rotary clutch eccentric sleeve 35 to ensure that the rotation angle position of the first rotary clutch eccentric sleeve 35 is at a position with a suitable pressing pressure and that the pressing pressure state is a reasonable state; for example, the first rotary drive cylinder 361 has a first push-pull piston rod 3611, and the first cylinder body 3612 of the first rotary drive cylinder 361 is hingedly arranged on the lifting seat 30. The first push-pull piston rod 3611 is hinged with the first connecting swing arm 351. The first eccentric sleeve rotation limit adjustment device 38 includes a first limit portion 381. The first limit portion 381 is located at the head of a first limit axis displacement adjustment rod 382 (which can be a screw rod, etc.). The first limit axis displacement adjustment rod 382 is arranged on the lifting seat 30. By adjusting the position of the first limit axis displacement adjustment rod 382 (such as a screw rod, etc., which can be driven by a motor or a hand wheel to adjust the rotation position) on the lifting seat 30, the position of the upper limit portion is adjusted. The axial movement adjustment direction of the first limit axis shift adjustment rod 382 is up and down adjustment; when the first push-pull piston rod 3611 drives the first connecting swing arm 351 to rotate into place, the first limit portion 381 blocks (the first connecting swing arm 351) so that the first connecting swing arm 351 is smoothly in place; for example, the first rotation driving cylinder 361 and the first limit portion 381 are respectively configured on the upper and lower sides of the first connecting swing arm 351, for example, the first limit portion 381 is located on the lower side of the first connecting swing arm 351, and the first rotation driving cylinder 361 Located on the upper side of the first connecting swing arm 351, the first limiting portion 381 is used to support the position of the first connecting swing arm 351 driven by the first rotating drive cylinder 361. The first push-pull piston rod 3611 of the first rotating drive cylinder 361 can be pushed into place with high stability, and the rotation position of the first rotating clutch eccentric sleeve 35 can be limited and adjusted to ensure that the rotation angle position of the first rotating clutch eccentric sleeve 35 is at a position with a suitable pressing pressure, and the pressing pressure state is in a reasonable state. Other types of first rotating drive devices 36 and eccentric sleeve rotation limiting adjustment devices 38 can also be selected, for example, the eccentric sleeve rotation limiting adjustment device 38 includes a limiting adjustment screw on the lifting seat 30.

[0036] In addition, the swing drive structure includes a second transmission drive device 8, and the second transmission drive device 8 includes a third transmission shaft 83 and a fourth transmission shaft 84, wherein the third transmission shaft 83 is connected to the first lifting swing arm 2, and the fourth transmission shaft 84 is connected to the second lifting swing arm 5. The second transmission drive device 8 also includes a distance adjustment device for adjusting the distance between the third transmission shaft 83 and the fourth transmission shaft 84. For example, the distance adjustment device includes a screw rod and nut distance adjustment transmission mechanism 80, and the distance between the third transmission shaft 83 and the fourth transmission shaft 84 is adjusted by the screw rod and nut distance adjustment transmission mechanism 80, that is, the third transmission shaft 83 and the fourth transmission shaft 84 are connected and configured with the screw rod and nut distance adjustment transmission mechanism 80. The distance adjustment device (such as the screw rod and nut distance adjustment transmission mechanism 80) can make the third transmission shaft 83 and the fourth transmission shaft 84 approach and separate from each other, so that the second lifting swing arm 5 can swing relative to the first lifting swing arm 2 under the action of the second transmission drive device 8, and even can achieve pressure adjustment. In addition, a second rotary clutch eccentric sleeve 85 is also provided between the pitch adjustment device (such as the screw rod and nut pitch adjustment transmission mechanism 80) and the third transmission shaft 83 and / or the fourth transmission shaft 84; it can be provided at one or both places; in the embodiment shown in the figure, the second rotary clutch eccentric sleeve 85 is provided between the fourth transmission shaft 84 and the screw rod and nut pitch adjustment transmission mechanism 80. Among them, the second rotary clutch eccentric sleeve 85 is connected to the corresponding second rotary drive device 86 in transmission, and the second rotary clutch eccentric sleeve 85 is driven by the second rotary drive device 86 to rotate, so that the relative position between the screw rod and nut pitch adjustment transmission mechanism 80 and the third transmission shaft 83 and / or the fourth transmission shaft 84 can be changed, so as to realize the swing and lifting of the second lifting swing arm 5 and the printing roller 7 installed thereon in an additional small range (matching the eccentric range of the eccentric sleeve), and the second lifting swing arm 5 can swing in an additional small range relative to the first lifting swing arm 2, so as to cooperate with the switching of the pressure-on and pressure-off states (with the transfer roller 1) in the printing operation. Among them, the corresponding second rotation drive device 86 is arranged on the first lifting swing arm 2 and / or the corresponding second rotation drive device 86 is arranged on the second lifting swing arm 5. For example, the second rotating clutch eccentric sleeve 85 is connected to the fourth transmission shaft 84, then the corresponding second rotation drive device 86 can be arranged on the second lifting swing arm 5.

[0037] For example, the figure shows an embodiment of the position setting of the second rotary clutch eccentric sleeve 85: the second rotary clutch eccentric sleeve 85 is sleeved on the fourth transmission shaft 84, and the screw rod and nut pitch adjustment transmission mechanism 80 is sleeved on the second rotary clutch eccentric sleeve 85; in addition, the second rotary drive device 86 includes a second rotary drive cylinder 861, and the second rotary drive cylinder 861 is connected to the second lifting swing arm 5. The second rotary drive cylinder 861 rises and falls with the second lifting swing arm 5 and can drive the second rotary clutch eccentric sleeve 85 to rotate and change the relative position; in addition, The second rotary clutch eccentric sleeve 85 is provided with a second connecting swing arm 851, and the second connecting swing arm 851 rotates together with the second rotary clutch eccentric sleeve 85 (which can be an integral structure or a split structure), and the second connecting swing arm 851 is connected to the second rotary drive cylinder 861 in transmission connection, and the second rotary drive cylinder 861 cooperates to drive the second connecting swing arm 851 to swing, thereby being able to drive the second rotary clutch eccentric sleeve 85 to rotate (back and forth). This structure is not only reasonable in transmission, but also convenient for subsequent limit adjustment. In addition, the second lifting swing arm 5 is also connected with a second eccentric sleeve rotation limit adjustment device 88, and the second eccentric sleeve rotation limit adjustment device 88 performs limit adjustment on the rotation position of the second rotary clutch eccentric sleeve 85, ensuring that the rotation angle position of the second rotary clutch eccentric sleeve 85 is a position of suitable pressing pressure size, and ensuring that the pressing pressure state is in a reasonable state; for example, the second rotary drive cylinder 861 has a second push-pull piston rod 8611, and the second cylinder body 86 of the second rotary drive cylinder 861 12 is hingedly arranged on the second lifting swing arm 5, the second push-pull piston rod 8611 is hingedly connected to the second connecting swing arm 851, and the second eccentric sleeve rotation limit adjustment device 88 includes a second limit portion 881, and the second limit portion 881 is located at the head of a second limit axis displacement adjustment rod 882 (which can be a screw rod, etc.), and the second limit axis displacement adjustment rod 882 is arranged on the second lifting swing arm 5; by adjusting the second limit axis displacement adjustment rod 882 (such as a screw rod, etc., the rotation adjustment rod can be driven by a motor or a hand wheel, etc. When the second push-pull piston rod 8611 drives the second connecting swing arm 851 to rotate into position, the second limiting portion 881 blocks (the second connecting swing arm 851) so that the second connecting swing arm 851 can be smoothly moved into position. For example, the second rotary drive cylinder 861 and the second limiting portion 881 are respectively arranged on the same side of the second connecting swing arm 851. By utilizing the different front and rear positions of the second limiting portion 881, the position of the second connecting swing arm 851 driven by the second rotary drive cylinder 861 can be supported. The second push-pull piston rod 8611 of the second rotary drive cylinder 861 can be pulled into position with high stability. The rotation position of the second rotary clutch eccentric sleeve 85 can be limited and adjusted to ensure that the rotation angle position of the second rotary clutch eccentric sleeve 85 is at a position with a suitable pressing pressure and that the pressing pressure state is in a reasonable state.

[0038] For example, the screw nut pitch adjustment transmission mechanism 80 includes a screw support seat 801, a transmission screw 802 and a transmission nut 803. The transmission screw 802 is arranged on the screw support seat 801, and the transmission screw 802 and the transmission nut 803 are connected in transmission. One of the screw support seat 801 and the transmission nut 803 is connected to the first lifting swing arm 2 through the third transmission shaft 83, and the other is connected to the second lifting swing arm 5 through the fourth transmission shaft 84. The transmission screw 802 on the screw support seat 801 can be driven by a hand wheel or a motor to rotate or move axially.

[0039] For another example, one end of the second lifting swing arm 5 is connected to the second support shaft 50, the fourth transmission shaft 84 is located at the other end of the second lifting swing arm 5, the axis of the second support is the second swing support axis, the second mounting portion is located between the second support shaft 50 and the fourth transmission shaft 84, and the second support shaft 50 is connected to the frame 4; the second support shaft 50 is located on the rear side of the fourth transmission shaft 84, and the second lifting swing arm 5 is also equipped with a second arc guide rail 42 for swing guide support; the second swing support axis is arranged below the first swing support axis, and the second swing support axis is arranged on the rear side of the first swing support axis.

Claims

1. A double lifting swing arm offset printing mechanism, characterized in that: The frame (4) is provided with a plate roller station, a first lifting swing arm (2), a second lifting swing arm (5) and a swing driving structure. A first mounting portion for mounting the transfer roller (1) is provided on the first lifting swing arm (2); a first swing support axis of the first lifting swing arm (2) is located at the rear side of the first mounting portion. The second lifting swing arm (5) is provided with a second mounting portion for mounting the printing roller (7), and the second swing support axis of the second lifting swing arm (5) is located at the rear side of the second mounting portion. The plate roller station is arranged above the first mounting part, and the second mounting part is arranged below the first mounting part. The first swing support axis and the second swing support axis are both arranged horizontally left and right. The first swing support axis and the second swing support axis are arranged coaxially or axially out of axial relationship; The swing drive structure comprises a first transmission drive device (3), the first transmission drive device (3) being transmission-connected to the first lifting swing arm (2). The swing drive structure comprises a second transmission drive device (8), and the second transmission drive device (8) is transmission-connected to the second lifting swing arm (5).

2. A double lifting swing arm type offset printing mechanism as claimed in claim 1, characterized in that: The first transmission drive device (3) comprises a lifting seat (30), a lifting drive device (34), a first transmission rotating shaft (31), a second transmission rotating shaft (32), a transmission arm (33) and a first rotary clutch eccentric sleeve (35). The lifting seat (30) is drivingly connected to the lifting drive device (34). The first transmission shaft (31) is arranged on the lifting seat (30). The second transmission shaft (32) is arranged on the first lifting swing arm (2). One end of the transmission arm (33) is connected to the first transmission shaft (31), and the other end of the transmission arm (33) is connected to the second transmission shaft (32); A first rotary clutch eccentric sleeve (35) is further provided between the transmission arm (33) and the first transmission shaft (31) and / or the second transmission shaft (32). The first rotary clutch eccentric sleeve (35) is transmission-connected to a corresponding first rotary drive device (36). The corresponding first rotary drive device (36) is arranged on the lifting seat (30) and / or the corresponding first rotary drive device (36) is arranged on the first lifting swing arm (2).

3. A double lifting swing arm offset printing mechanism as claimed in claim 2, characterized in that: One end of the first lifting swing arm (2) is connected to the first support shaft (20), the second transmission shaft (32) is located at the other end of the first lifting swing arm (2), the axis of the first support shaft (20) is a first swing support axis, the first mounting portion is located between the first support shaft (20) and the second transmission shaft (32), and the first support shaft (20) is connected to the frame (4); The first lifting swing arm (2) comprises a paired left swing arm (21) and a right swing arm, the left swing arm (21) is provided with a roller changing opening (22), the left swing arm (21) is provided with a roller body supporting end cover (23), and the roller body supporting end cover (23) is connected to the roller changing opening (22); The first transmission shaft (31) is arranged below the second transmission shaft (32), the first support shaft (20) is located at the rear side of the second transmission shaft (32), the lifting seat (30) is located at the front side of the second transmission shaft (32), and the first lifting swing arm (2) is also provided with a first arc-shaped guide rail (41) for swinging guide support; The lifting seat (30) is arranged on a vertical guide rail (37), and the vertical guide rail (37) is arranged on a frame. The lifting drive device (34) comprises a lifting drive motor (341), a lifting drive screw rod (342) and a lifting drive nut; the lifting drive motor (341) is drivingly connected to the lifting drive screw rod (342); the lifting drive screw rod (342) is drivingly connected to the lifting drive nut; the lifting drive nut is mounted on the lifting seat (30); and the lifting drive screw rod (342) is arranged vertically.

4. A double lifting swing arm type offset printing mechanism as claimed in claim 2, characterized in that: A first rotary clutch eccentric sleeve (35) is sleeved on the first transmission shaft (31). One end of the transmission arm (33) is sleeved on the second transmission shaft (32). The other end of the transmission arm (33) is sleeved on the first rotary clutch eccentric sleeve (35). The first rotary drive device (36) comprises a first rotary drive cylinder (361), and the first rotary drive cylinder (361) is connected to the lifting seat (30). The first rotary clutch eccentric sleeve (35) is provided with a first connecting swing arm (351), and the first connecting swing arm (351) is drivingly connected to the first rotary drive cylinder (361).

5. A double lifting swing arm type offset printing mechanism as claimed in claim 4, characterized in that: The lifting seat (30) is also connected to a first eccentric sleeve rotation limit adjustment device (38); The first rotary drive cylinder (361) has a first push-pull piston rod (3611). The first cylinder body (3612) of the first rotary drive cylinder (361) is hingedly arranged on the lifting seat (30). The first push-pull piston rod (3611) is hingedly connected to the first connecting swing arm (351). The first eccentric sleeve rotation limit adjustment device (38) comprises a first limit portion (381), the first limit portion (381) is located at the head of a first limit axis displacement adjustment rod (382), and the first limit axis displacement adjustment rod (382) is arranged on the lifting seat (30).

6. A double lifting swing arm offset printing mechanism as claimed in claim 1 or 2, characterized in that: The second transmission drive device (8) comprises a third transmission rotating shaft (83) and a fourth transmission rotating shaft (84). The third transmission shaft (83) is connected to the first lifting swing arm (2), and the fourth transmission shaft (84) is connected to the second lifting swing arm (5). The second transmission drive device (8) further comprises a distance adjustment device for adjusting the distance between the third transmission rotating shaft (83) and the fourth transmission rotating shaft (84). The pitch adjustment device comprises a screw-nut pitch adjustment transmission mechanism (80); the screw-nut pitch adjustment transmission mechanism (80) is connected between the third transmission rotating shaft (83) and the fourth transmission rotating shaft (84); A second rotary clutch eccentric sleeve (85) is further provided between the distance adjustment device and the third transmission shaft (83) and / or the fourth transmission shaft (84), and the second rotary clutch eccentric sleeve (85) is transmission-connected to a corresponding second rotary drive device (86). The corresponding second rotary drive device (86) is arranged on the first lifting swing arm (2) and / or the corresponding second rotary drive device (86) is arranged on the second lifting swing arm (5).

7. A double lifting swing arm type offset printing mechanism as claimed in claim 6, characterized in that: A second rotary clutch eccentric sleeve (85) is sleeved on the fourth transmission shaft (84). The screw rod and nut pitch adjustment transmission mechanism (80) is sleeved on the second rotary clutch eccentric sleeve (85). The second rotary drive device (86) comprises a second rotary drive cylinder (861), and the second rotary drive cylinder (861) is connected to the second lifting swing arm (5). The second rotary clutch eccentric sleeve (85) is provided with a second connecting swing arm (851), and the second connecting swing arm (851) is drivingly connected to the second rotary drive cylinder (861).

8. The double lifting swing arm type offset printing mechanism according to claim 7, characterized in that: The second lifting swing arm (5) is also connected to a second eccentric sleeve rotation limit adjustment device (88). The second rotary drive cylinder (861) has a second push-pull piston rod (8611). The second cylinder body (8612) of the second rotary drive cylinder (861) is hingedly arranged on the second lifting swing arm (5). The second push-pull piston rod (8611) is hingedly connected to the second connecting swing arm (851). The second eccentric sleeve rotation limit adjustment device (88) comprises a second limit portion (881), the second limit portion (881) is located at the head of a second limit axis displacement adjustment rod (882), and the second limit axis displacement adjustment rod (882) is arranged on the second lifting swing arm (5); The screw rod and nut pitch adjustment transmission mechanism (80) comprises a screw rod support seat (801), a transmission screw rod (802) and a transmission nut (803); the transmission screw rod (802) is arranged on the screw rod support seat (801), and the transmission screw rod (802) and the transmission nut (803) are matched and connected in transmission; One of the screw support seat (801) and the transmission nut (803) is connected to the first lifting swing arm (2) via a third transmission shaft (83), and the other is connected to the second lifting swing arm (5) via a second rotary clutch eccentric sleeve (85) and a fourth transmission shaft (84).

9. The double lifting swing arm type offset printing mechanism according to claim 6, characterized in that: One end of the second lifting swing arm (5) is connected to the second support shaft (50), the fourth transmission shaft (84) is located at the other end of the second lifting swing arm (5), the axis of the second support is the second swing support axis, the second mounting portion is located between the second support shaft (50) and the fourth transmission shaft (84), and the second support shaft (50) is connected to the frame (4); The second support shaft (50) is located at the rear side of the fourth transmission shaft (84). The second lifting swing arm (5) is also provided with a second arc-shaped guide rail (42) for swinging guide support; The second swing support axis is arranged below the first swing support axis. The second swing support axis is arranged on the rear side of the first swing support axis.

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