Double-lifting swing arm type offset printing mechanism

Abstract

The utility model 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

[0001] The utility model relates to the printing equipment among glue printing mechanism. BACKGROUND

[0002] The printing equipment among glue printing mechanism has plate roller, transfer roller and bottom roller (namely bearing roller) cooperation glue printing work, wherein the transfer roller is arranged between the plate roller and the bottom roller, and the plate roller and the transfer roller, the transfer roller and the bottom roller need to keep the state of being in contact and rolling in order during printing. In the continuous non-back printing operation of the printing material (such as continuous paper), in order to adapt to the different length unit of the plate pattern, different diameter size plate roller (such as its roller) needs to be replaced, and the matching specification transfer roller (such as its roller) also needs to be replaced, and the convenience of disassembling each roller is crucial. In addition, during the printing process of the printing material, each roller keeps the state of being in contact in turn, and the pressure of the contact needs to be adjusted to the appropriate pressure to ensure the printing effect, and they also need to be separated from the pressure (namely disengaged) when paused. In addition, the horizontal movable separation type structure device occupies relatively large space, and the running stability is poor. SUMMARY

[0003] In view of the technical problems existing in the background art, the technical problems solved by the utility model aim to provide a double-lifting swing arm type glue printing mechanism.

[0004] In order to solve the above technical problems, the utility model adopts the following technical scheme: the double-lifting swing arm type glue printing mechanism, characterized in that: the rack is provided with a plate roller station, a first lifting swing arm and a second lifting swing arm, the first lifting swing arm is provided with a first mounting part for mounting the transfer roller, the first swing supporting axis of the first lifting swing arm is located at the rear side of the first mounting part, the second lifting swing arm is provided with a second mounting part for mounting the bearing roller, the second swing supporting axis of the second lifting swing arm is located at the rear side of the second mounting part, the plate roller station is arranged above the first mounting part, the second mounting part is arranged below the first mounting part, the first swing supporting axis and the second swing supporting axis are both arranged horizontally, and the first swing supporting axis and the second swing supporting axis are coaxial or arranged on different axes.

[0005] The above technical scheme can also be variously optimized or supplemented as follows.

[0006] It also includes a swing driving structure, and the first lifting swing arm and the second lifting swing arm are transmissionally connected with the swing driving structure.

[0007] For example, the swing driving structure comprises a first transmission driving device, the first transmission driving device comprises a lifting seat, a lifting driving device, a first transmission shaft, a second transmission shaft, a transmission arm and a first rotary clutch eccentric sleeve, the lifting seat is in transmission connection with the lifting driving 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 with the first transmission shaft, and the other end of the transmission arm is connected with the second transmission shaft; the first rotary clutch eccentric sleeve is further arranged between the transmission arm and the first transmission shaft and / or the second transmission shaft, the first rotary clutch eccentric sleeve is in transmission connection with a corresponding first rotary driving device, and the corresponding first rotary driving device is arranged on the lifting seat and / or the corresponding first rotary driving device is arranged on the first lifting swing arm.

[0008] One end of the first lifting swing arm is connected with 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 a 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 with the rack; the first lifting swing arm comprises a matched left swing arm and a right swing arm, the left swing arm is provided with a roll changing opening, the left swing arm is provided with a roll body support end cover, and the roll body support end cover is connected at the roll changing opening; 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 further provided with a first arc-shaped guide rail for swing guide support; the lifting seat is arranged on a vertical guide rail, the vertical guide rail is arranged on the rack, the lifting driving device comprises a lifting driving motor, a lifting driving screw rod and a lifting driving nut, the lifting driving motor is in transmission connection with the lifting driving screw rod, and the lifting driving screw rod is in transmission connection with the lifting driving nut; the lifting driving nut is mounted and connected on the lifting seat; and the lifting driving screw rod is vertically arranged.

[0009] The first transmission shaft is sleeved with the first rotary clutch eccentric sleeve, one end of the transmission arm is sleeved on the second transmission shaft, the other end of the transmission arm is sleeved on the first rotary clutch eccentric sleeve, the first rotary driving device comprises a first rotary driving cylinder, the first rotary driving cylinder is connected on the lifting seat, the first rotary clutch eccentric sleeve is provided with a first connecting swing arm, and the first connecting swing arm is in transmission connection with the first rotary driving cylinder.

[0010] In addition, the lifting seat is further connected with a first eccentric sleeve rotary limit adjusting device; the first rotary driving cylinder is provided with a first push-pull piston rod, a first cylinder body of the first rotary driving cylinder is hingedly arranged on the lifting seat, the first push-pull piston rod is hinged with the first connecting swing arm, and the first eccentric sleeve rotary limit adjusting device comprises a first limiting portion, the first limiting portion is located at the head of a first limiting shaft displacement adjusting rod, and the first limiting shaft displacement adjusting rod is arranged on the lifting seat.

[0011] Further, the swing driving structure comprises a second transmission driving device, the second transmission driving device comprises a third transmission shaft and a fourth transmission shaft, the third transmission shaft is connected to the first lifting swing arm, the fourth transmission shaft is connected to the second lifting swing arm, the second transmission driving device further comprises a pitch adjusting device for adjusting the distance between the third transmission shaft and the fourth transmission shaft, the pitch adjusting device comprises a screw nut pitch adjusting transmission mechanism, the screw nut pitch adjusting transmission mechanism is connected between the third transmission shaft and the fourth transmission shaft; the pitch adjusting device and the third transmission shaft and / or the fourth transmission shaft are further provided with a second rotary clutch eccentric sleeve, the second rotary clutch eccentric sleeve is drivingly connected with a corresponding second rotary driving device, the corresponding second rotary driving device is arranged on the first lifting swing arm and / or the corresponding second rotary driving device is arranged on the second lifting swing arm.

[0012] Wherein, the fourth transmission shaft is sleeved with the second rotary clutch eccentric sleeve, the screw nut pitch adjusting transmission mechanism is sleeved on the second rotary clutch eccentric sleeve, the second rotary driving device comprises a second rotary driving cylinder, the second rotary driving cylinder is connected to the second lifting swing arm, the second rotary clutch eccentric sleeve has a second connecting swing arm, the second connecting swing arm is drivingly connected with the second rotary driving cylinder.

[0013] Further optimization, the second lifting swing arm is further connected with a second eccentric sleeve rotary limiting adjusting device, the second rotary driving cylinder has a second push-pull piston rod, a second cylinder body of the second rotary driving cylinder is hingedly arranged on the second lifting swing arm, the second push-pull piston rod is hinged with the second connecting swing arm, the second eccentric sleeve rotary limiting adjusting device comprises a second limiting part, the second limiting part is located at the head of a second limiting shaft adjusting rod, the second limiting shaft adjusting rod is arranged on the second lifting swing arm; the screw nut pitch adjusting transmission mechanism comprises a screw rod support seat, a transmission screw rod and a transmission screw nut, the transmission screw rod is arranged on the screw rod support seat, the transmission screw rod is drivingly connected with the transmission screw nut in cooperation; one of the screw rod support seat and the transmission screw nut is connected to the first lifting swing arm through the third transmission shaft, and the other is connected to the second lifting swing arm through the second rotary clutch eccentric sleeve and the fourth transmission shaft.

[0014] 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 second support shaft is the second swing support axis, the second mounting part is located between the second support shaft and the fourth transmission shaft, and the second support shaft is connected to the rack; the second support shaft is located at the rear side of the fourth transmission shaft, and the second lifting swing arm is further provided with a second arc-shaped guide rail for swing guide support; the second swing support axis is arranged below the first swing support axis, wherein the second swing support axis is arranged at the rear side of the first swing support axis.

[0015] The beneficial effects of the utility model are that, in the double-lifting swing arm type offset printing mechanism, double-lifting swing arm structures are adopted, which can assemble a transfer roller and a blanket roller respectively, and the transfer roller and the blanket roller are lifted and lowered respectively by swinging lifting, and after the corresponding swing arms (first lifting swing arm and second lifting swing arm) swing and separate from each other, a larger operation space can be left for assembly, the space occupied by the double-lifting swing arm structure is relatively compact, the disassembly and assembly convenience of the rollers (transfer roller, blanket roller and even plate roller) is improved, and the assembly of transfer rollers with different sizes and diameters is satisfied, the corresponding swing arms (first lifting swing arm and second lifting swing arm) are stably supported and swing, the first lifting swing arm and the second lifting swing arm act in turn when the plate roller and the transfer roller are pressed together and when the plate roller and the transfer roller are separated, the pressure of the plate roller and the transfer roller and the pressure of the transfer roller and the blanket roller are conveniently adjusted and are not easily interfered with each other, and the plate roller and the transfer roller are lifted upwards when pressed together and are not easily interfered with each other. BRIEF DESCRIPTION OF DRAWINGS

[0016] The relevant details and working principles of the embodiments of the utility model will be described below in combination with the drawings.

[0017] Figure 1 It is a structural schematic view of the utility model.

[0018] Figure 2 It is Figure 1 Another annotation diagram.

[0019] Figure 3 It is Figure 2 A-A sectional view.

[0020] In the drawings:

[0021] 1, transfer roller; 10, roller shaft;

[0022] 2, first lifting swing arm; 20, first support shaft; 21, left swing arm; 22, roller replacement opening; 23, roller body support end cover; 24, movable lock block;

[0023] 3, first transmission driving device; 30, lifting seat; 31, first transmission rotating shaft; 32, second transmission rotating shaft; 33, transmission arm; 34, lifting driving device; 35, first rotary clutch eccentric sleeve; 36, first rotary driving device; 37, vertical guide rail; 38, first eccentric sleeve rotary limiting adjusting device;

[0024] 341, lifting driving motor; 342, lifting driving screw;

[0025] 351, first connecting swing arm;

[0026] 361, first rotary driving cylinder; 3611, first push-pull piston rod; 3612, first cylinder body;

[0027] 381, first limiting part; 382, first limiting shaft displacement adjusting rod;

[0028] 4, frame; 41, first arc-shaped guide rail; 42, second arc-shaped guide rail;

[0029] 5, second lifting swing arm; 50, second support shaft;

[0030] 6, plate roller;

[0031] 7, impression roller;

[0032] 8, second transmission driving device; 80, screw nut distance adjusting transmission mechanism; 83, third transmission shaft; 84, fourth transmission shaft; 85, second rotary clutch eccentric sleeve; 86, second rotary driving device; 88, second eccentric sleeve rotary limiting adjusting device;

[0033] 801, screw rod support seat; 802, transmission screw rod; 803, transmission screw nut;

[0034] 851, second connecting swing arm;

[0035] 861, second rotary driving cylinder; 8611, second push-pull piston rod; 8612, second cylinder body;

[0036] 881, second limiting part; 882, second limiting shaft displacement adjusting rod. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0038] Referring to the drawings, in the embodiment of the present embodiment, a double-lifting swing arm type offset printing mechanism is provided with a plate roller station, a first lifting swing arm 2 and a second lifting swing arm 5 on a rack 4. 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 cylinder), and a 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 swings up and down around the first swing support axis to lift or lower the transfer roller 1 mounted thereon. The second lifting swing arm 5 is provided with a second mounting portion for mounting a printing roller 7, and a 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 swings up and down around the second swing support axis to lift or lower the printing roller 7 mounted thereon. The plate roller station is arranged above the first mounting portion. When the transfer roller 1 assembled 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 press together or separate (i.e. disengage). The second mounting portion is arranged below the first mounting portion. When the printing roller 7 (i.e. the bottom roller) assembled at the second mounting portion is lifted or lowered with the second lifting swing arm 5, it can cooperate with the transfer roller 1 at the first mounting portion to press together or separate (i.e. disengage). In addition, the first swing support axis and the second swing support axis are both arranged horizontally, and the first swing support axis and the second swing support axis are coaxial or non-coaxial.

[0039] In the double-lifting swing arm type offset printing mechanism, a double-lifting swing arm structure is adopted to assemble the transfer roller 1 and the printing roller 7, and to lift or lower the corresponding transfer roller 1 and printing roller 7 by swinging up and down. After the corresponding swing arms (the first lifting swing arm 2 and the second lifting swing arm 5) are separated by swinging, a larger operation space is available for assembly. The double-lifting swing arm structure occupies a relatively compact space, and the disassembly and assembly of the rollers (the transfer roller 1, the printing roller 7 and even the plate roller 6) are facilitated, meeting the assembly requirements of transfer rollers 1 of different sizes and diameters. The corresponding swing arms (the first lifting swing arm 2 and the second lifting swing arm 5) are stably supported and swing, and the first lifting swing arm 2 and the second lifting swing arm 5 act in sequence when pressing together and separating. The pressing force of each roller (the plate roller 6, the transfer roller 1 and the printing roller 7) is easily adjusted without mutual interference, and the rollers are lifted upwards when pressing together without conflict.

[0040] The following optimizations or further explanations can be made based on the above embodiments.

[0041] For example, the double-lift swing arm type offset printing mechanism further comprises a swing driving structure, and the first lift swing arm 2 and the second lift swing arm 5 are drivingly connected to the swing driving structure. That is, the first lift swing arm 2 and the second lift swing arm 5 are driven to swing up and down to lift or lower the transfer roller 1 or the impression roller 7 mounted thereon. The swing driving structure can be in various modes, for example, a cylinder or a motor is respectively used to drive the lift swing.

[0042] In the embodiment, the following optimization scheme is adopted,

[0043] The swing driving structure comprises a first transmission driving device 3, which comprises a lift seat 30, a lift driving 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 lift seat 30 is drivingly connected to the lift driving device 34, the first transmission shaft 31 is arranged on the lift seat 30 and is driven by the lift driving device 34 to lift the lift seat 30 up and down, and the first transmission shaft 31 lifts up and down together with the lift seat 30. The second transmission shaft 32 is arranged on the first lift swing arm 2, and the first lift swing arm 2 lifts up and down together with the second transmission shaft 32. 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. The first transmission shaft 31 and the second transmission shaft 32 are drivingly connected through the transmission arm 33. When the first transmission shaft 31 lifts up and down together with the lift seat 30, the first transmission shaft 31 can drive the second transmission shaft 32 on the first lift swing arm 2 through the transmission arm 33 (push-pull) to make the first lift swing arm 2 swing up and down around the first support shaft 20.

[0044] The first rotation clutch eccentric sleeve 35 is arranged between the transmission arm 33 and the first transmission shaft 31, and the first rotation clutch eccentric sleeve 35 is driven by the first rotation driving 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, the first lifting swing arm 2 and the transfer roller 1 mounted thereon can be additionally swung and lifted in a small range (matching the eccentric range of the eccentric sleeve), and the switching between the pressing and unpressing states in the printing operation (with the plate roller 6) can be matched. The corresponding first rotation driving device 36 is arranged on the lifting seat 30 and / or the corresponding first rotation driving device 36 is arranged on the first lifting swing arm 2; for example, the first rotation clutch eccentric sleeve 35 is connected with the first transmission shaft 31, and the corresponding first rotation driving device 36 can be arranged on the lifting seat 30; for another example, the first rotation clutch eccentric sleeve 35 is connected with the second transmission shaft 32, and the corresponding first rotation driving device 36 can be arranged on the first lifting swing arm 2.

[0045] When it is necessary to replace and disassemble the transfer roller 1, the lifting seat 30 is actuated (e.g., lowered) to drive the first lifting swing arm 2 to swing downward through the transmission arm 33, so that sufficient operation space is left above to facilitate replacement and assembly of the transfer roller 1 (such as the roller barrel) and other operations, such as disassembly, maintenance, and the like. Of course, the downward swing of the first lifting swing arm 2 can also separate the transfer roller 1 from other structures above, so that the transfer roller 1 is in an idle state (such as when the machine is stopped). The lifting seat 30 is actuated (e.g., raised) to drive the first lifting swing arm 2 to swing upward through the transmission arm 33, so that the transfer roller 1 mounted thereon can be moved toward other structures (such as the plate roller 6) above for printing operation. After the lifting seat 30 is actuated to the position, the first lifting swing arm 2 is also swung upward to the position, and then the first rotation clutch eccentric sleeve 35 can be additionally rotated to drive the first lifting swing arm 2 and the transfer roller 1 mounted thereon to additionally swing and lift in a small range (matching the eccentric range of the eccentric sleeve), so as to switch between the unpressing (i.e., disengaging) and pressing states in the printing operation.

[0046] The first lifting swing arm 2 can be driven by the first transmission drive device 3 to realize large-stroke and large-range up-down swing, and the first lifting swing arm 2 can be swung in a small range (when the lifting seat 30 is moved to a position, such as upward) by the first rotary clutch eccentric sleeve 35 to realize the switching of the pressure combination and separation of the transfer roller 1, and even the pressure of the pressure combination can be adjusted according to the printing requirements by adjusting the rotation angle position of the first rotary clutch eccentric sleeve 35, the pressure combination point can be finely adjusted, and the pressure state is ensured. The transfer roller 1 will be combined with the plate roller 6 above to realize pressure combination and separation. The up-down swing (arc trajectory) of the first lifting swing arm 2 is driven by the lifting linear motion of the lifting seat 30, the lifting operation of the lifting seat 30 is relatively stable, and the first lifting swing arm 2 is supported by the first swing support axis and the second transmission shaft 32.

[0047] Further optimization can be made. 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 rack 4. The two end support structures of the first lifting swing arm 2 are formed, the up-down swing operation of the first lifting swing arm 2 is more stable, and the operation of the transfer roller 1 is also relatively stable.

[0048] For example, the first lifting swing arm 2 includes a pair of left swing arm 21 and right swing arm, the left swing arm 21 is provided with a roller replacement opening 22, the roller replacement opening 22 is used for facilitating the axial movement and replacement of the transfer roller 1 (such as the roller shaft 10); the left swing arm 21 is provided with a roller body support end cover 23, the roller body support end cover 23 is connected to the roller replacement opening 22, the roller body support end cover 23 is used for supporting the transfer roller 1 (such as the roller shaft 10) at the roller replacement opening 22, and the roller body support end cover 23 can adopt a detachable structure, for example, the roller body support end cover 23 is hinged to the left swing arm 21 and locked by a movable lock block 24.

[0049] In addition, the first transmission shaft 31 is arranged below the second transmission shaft 32, and the first transmission shaft 31 can support the second transmission shaft 32 from below, so that the structure is relatively 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, so that the space structure is reasonable and convenient for assembly. The first lifting swing arm 2 is also provided with a first arc-shaped guide rail 41 for swing guiding and supporting, so that the first lifting swing arm 2 can stably swing. The arc-shaped guide rail can be mounted on the rack 4, and the arc-shaped guide rail can also be arranged at the swing distal end (i.e. the head) of the first lifting swing arm 2.

[0050] The lifting seat 30 can be arranged on the vertical guide rail 37, and the vertical guide rail 37 can be mounted on the rack 4. The lifting seat 30 can stably rise and fall vertically. The lifting driving device 34 comprises a lifting driving motor 341 (such as a servo motor), a lifting driving screw 342 and a lifting driving nut. The lifting driving motor 341 is in transmission connection with the lifting driving screw 342, the lifting driving screw 342 is in transmission connection with the lifting driving nut, and the lifting driving nut is mounted and connected on the lifting seat 30. The lifting driving screw 342 is vertically arranged. The lifting driving motor 341 drives the lifting driving nut to rise and fall through the lifting driving screw 342, so as to cooperate with the lifting seat 30 to rise and fall on the vertical guide rail 37. The lifting driving structure is stable in operation, can be relatively accurately stopped at a preset position, can keep the position stable after stopping and is not easy to loosen, can ensure the printing stability, and can bear the pressure during printing.

[0051] In the chart, an embodiment of setting 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 two end round holes of the transmission arm 33 are matched and sleeved on the second transmission shaft 32 and the first rotary clutch eccentric sleeve 35 respectively 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 comprises a first rotary drive cylinder 361, the first rotary drive cylinder 361 is connected to the lifting 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 to 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 rotates together with the first rotary clutch eccentric sleeve 35 (which can be an integral structure or a split structure), the first connecting swing arm 351 is in transmission connection with the first rotary drive cylinder 361, the first connecting swing arm 351 is driven to swing by the first rotary drive cylinder 361, so that the first rotary clutch eccentric sleeve 35 can be driven to rotate (back and forth), and in this structure, the transmission is reasonable, and subsequent limiting adjustment is facilitated.Further, the first eccentric sleeve rotation limiting and adjusting device 38 is connected to the lifting seat 30, which limits and adjusts the rotation position of the first rotation and clutch eccentric sleeve 35, ensures that the rotation angle position of the first rotation and clutch eccentric sleeve 35 is at a position with appropriate compression pressure, and ensures that the compression pressure state is reasonable. For example, the first rotation driving air cylinder 361 has a first push-pull piston rod 3611, and the first cylinder body 3612 of the first rotation driving air 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 limiting and adjusting device 38 includes a first limiting part 381, which is located at the head of the first limiting shaft adjusting rod 382 (which can be a lead screw, etc.). The first limiting shaft adjusting rod 382 is arranged on the lifting seat 30. The position of the limiting part above the lifting seat 30 is adjusted by adjusting the position of the first limiting shaft adjusting rod 382 (such as a lead screw, which can be rotated and adjusted in position by a motor or hand wheel, etc.). The adjustment direction of the axial movement of the first limiting shaft adjusting rod 382 is up and down. When the first push-pull piston rod 3611 drives the first connecting swing arm 351 to rotate into position, the first limiting part 381 blocks the first connecting swing arm 351 to smoothly reach the position. For example, the first rotation driving air cylinder 361 and the first limiting part 381 are respectively arranged on the upper and lower sides of the first connecting swing arm 351. For example, the first limiting part 381 is located on the lower side of the first connecting swing arm 351, and the first rotation driving air cylinder 361 is located on the upper side of the first connecting swing arm 351. The first limiting part 381 can be used to block the position of the first connecting swing arm 351 driven downward by the first rotation driving air cylinder 361. The first push-pull piston rod 3611 of the first rotation driving air cylinder 361 can be pushed into position, which has high stability and can limit and adjust the rotation position of the first rotation and clutch eccentric sleeve 35, ensure that the rotation angle position of the first rotation and clutch eccentric sleeve 35 is at a position with appropriate compression pressure, and ensure that the compression pressure state is reasonable. Other forms of first rotation driving devices 36 and eccentric sleeve rotation limiting and adjusting devices 38 can also be used, such as the eccentric sleeve rotation limiting and adjusting device 38 containing a limiting and adjusting lead screw on the lifting seat 30.

[0052] Further, the swing driving structure comprises a second transmission driving device 8, the second transmission driving device 8 comprises a third transmission shaft 83 and a fourth transmission shaft 84, the third transmission shaft 83 is connected to the first lifting swing arm 2, the fourth transmission shaft 84 is connected to the second lifting swing arm 5, the second transmission driving device 8 further comprises a pitch adjusting device for adjusting the distance between the third transmission shaft 83 and the fourth transmission shaft 84, for example, the pitch adjusting device comprises a screw nut pitch adjusting transmission mechanism 80, the distance between the third transmission shaft 83 and the fourth transmission shaft 84 is adjusted by the screw nut pitch adjusting transmission mechanism 80, that is, the screw nut pitch adjusting transmission mechanism 80 is connected and arranged between the third transmission shaft 83 and the fourth transmission shaft 84, the pitch adjusting device (such as the screw nut pitch adjusting transmission mechanism 80) can make the third transmission shaft 83 and the fourth transmission shaft 84 approach each other 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 driving device 8, and even realize the pressure adjustment of the combined pressure;

[0053] In addition, the pitch adjusting device (such as the screw nut pitch adjusting transmission mechanism 80) is further provided with a second rotary clutch eccentric sleeve 85 between the third transmission shaft 83 and / or the fourth transmission shaft 84; one or both can be provided; in the embodiment shown in the figure, the second rotary clutch eccentric sleeve 85 is arranged between the fourth transmission shaft 84 and the screw nut pitch adjusting transmission mechanism 80. The second rotary clutch eccentric sleeve 85 is drivingly connected with a corresponding second rotary driving device 86, the second rotary clutch eccentric sleeve 85 is rotated by the second rotary driving device 86 to cooperate and drive, so as to change the relative position between the screw nut pitch adjusting transmission mechanism 80 and the third transmission shaft 83 and / or the fourth transmission shaft 84, realize the swing lifting of the second lifting swing arm 5 and the printing roller 7 mounted thereon in a small additional range (matching the eccentric range of the eccentric sleeve), and the second lifting swing arm 5 can swing in a small additional range relative to the first lifting swing arm 2, and can cooperate with the switching between the combined pressure and the separated pressure state (with the transfer roller 1) in the printing operation. The corresponding second rotary driving device 86 is arranged on the first lifting swing arm 2 and / or the corresponding second rotary driving device 86 is arranged on the second lifting swing arm 5, for example, the second rotary clutch eccentric sleeve 85 is connected with the fourth transmission shaft 84, and the corresponding second rotary driving device 86 can be arranged on the second lifting swing arm 5.

[0054] In the diagram, an embodiment of setting the position 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 nut distance adjusting 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, which 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,

[0055] The second rotating and clamping eccentric sleeve 85 is provided with a second connecting swing arm 851 which rotates together with the second rotating and clamping eccentric sleeve 85 (which can be an integral structure or a split structure), and the second connecting swing arm 851 is in transmission connection with the second rotating drive air cylinder 861. The second connecting swing arm 851 is swung by the second rotating drive air cylinder 861, so as to drive the second rotating and clamping eccentric sleeve 85 to rotate (back and forth). In this structure, the transmission is reasonable, and subsequent limiting adjustment is facilitated. In addition, the second lifting swing arm 5 is also connected with a second eccentric sleeve rotating limiting adjustment device 88. The second eccentric sleeve rotating limiting adjustment device 88 limits and adjusts the rotating position of the second rotating and clamping eccentric sleeve 85, so as to ensure that the rotating angle position of the second rotating and clamping eccentric sleeve 85 is at a position with a suitable pressing force, and ensure that the pressing force state is in a reasonable state. For example, the second rotating drive air cylinder 861 is provided with a second push-pull piston rod 8611, and the second cylinder body 8612 of the second rotating drive air cylinder 861 is hingedly arranged on the second lifting swing arm 5. The second push-pull piston rod 8611 is hingedly connected with the second connecting swing arm 851. The second eccentric sleeve rotating limiting adjustment device 88 comprises a second limiting part 881 which is located at the head of a second limiting shaft adjustment rod 882 (which can be a lead screw). The second limiting shaft adjustment rod 882 is arranged on the second lifting swing arm 5. The position of the limiting part on the second lifting swing arm 5 is adjusted by adjusting the position of the second limiting shaft adjustment rod 882 (such as a lead screw, which can be rotated and adjusted in position by a motor or a hand wheel). For example, the axial movement adjustment direction of the second limiting shaft adjustment rod 882 is forward and backward adjustment. When the second push-pull piston rod 8611 drives the second connecting swing arm 851 to rotate to the position, the second connecting swing arm 851 is blocked by the second limiting part 881, so that the second connecting swing arm 851 is smoothly positioned. For example, the second rotating drive air cylinder 861 and the second limiting part 881 are arranged on the same side of the second connecting swing arm 851 respectively. By changing the forward and backward positions of the second limiting part 881, the second connecting swing arm 851 can be limited in position after being swung by the second rotating drive air cylinder 861. The second push-pull piston rod 8611 of the second rotating drive air cylinder 861 can be pulled to the position, and the stability is high. The rotating position of the second rotating and clamping eccentric sleeve 85 can be limited and adjusted, so as to ensure that the rotating angle position of the second rotating and clamping eccentric sleeve 85 is at a position with a suitable pressing force, and ensure that the pressing force state is in a reasonable state.

[0056] For example, the screw-nut distance adjusting transmission mechanism 80 comprises a screw rod support seat 801, a transmission screw rod 802 and a transmission screw nut 803. The transmission screw rod 802 is arranged on the screw rod support seat 801, and the transmission screw rod 802 is in matched transmission connection with the transmission screw nut 803. One of the screw rod support seat 801 and the transmission screw nut 803 is connected to the first lifting swing arm 2 through a third transmission shaft 83, and the other is connected to the second lifting swing arm 5 through a fourth transmission shaft 84. The transmission screw rod 802 on the screw rod support seat 801 can be driven to rotate or move axially by a hand wheel or a motor.

[0057] 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 second support shaft 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 rack 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 swing guide support, the second swing support axis is arranged below the first swing support axis, and the second swing support axis is arranged at the rear side of the first swing support axis.

Claims

1. A double-lift swing-armed offset printing mechanism, characterised in that: Its rack (4) is provided with a plate roller station, a first lifting swing arm (2) and a second lifting swing arm (5), The first lifting swing arm (2) is provided with a first mounting portion for mounting the transfer roller (1), and 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 impression roller (7), and a 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 portion, and 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, The first swing support axis and the second swing support axis are coaxially arranged or arranged in different axes.

2. The dual-lift pendulum-type offset printing mechanism according to claim 1, characterized in that: It also includes a swing driving structure, and the first lifting swing arm (2) and the second lifting swing arm (5) are drivingly connected to the swing driving structure.

3. The dual-lift pendulum-type offset printing mechanism according to claim 2, wherein: The swing driving structure includes a first transmission driving device (3), and the first transmission driving device (3) includes a lifting seat (30), a lifting driving 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 drivingly connected to the lifting driving 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 arranged between the transmission arm (33) and the first transmission shaft (31) and / or the second transmission shaft (32), and the first rotary clutch eccentric sleeve (35) is drivingly connected to a corresponding first rotary driving device (36), The corresponding first rotary driving device (36) is arranged on the lifting seat (30) and / or the corresponding first rotary driving device (36) is arranged on the first lifting swing arm (2).

4. The double-lifting-swing-arm type offset printing mechanism according to claim 3, wherein: One end of the first lifting swing arm (2) is connected to a first support shaft (20), and 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 rack (4); The first lifting swing arm (2) includes a pair of left and right swing arms, a roll changing opening (22) is arranged on the left swing arm (21), and a roll body support end cover (23) is arranged on the left swing arm (21), and the roll body support end cover (23) is connected to the roll 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 further provided with a first arc-shaped guide rail (41) for swing guide support. The lifting seat (30) is arranged on the vertical guide rail (37) which is arranged on the frame, The lifting driving device (34) comprises a lifting driving motor (341), a lifting driving screw rod (342) and a lifting driving screw nut, the lifting driving motor (341) is in transmission connection with the lifting driving screw rod (342), the lifting driving screw rod (342) is in transmission connection with the lifting driving screw nut, the lifting driving screw nut is installed and connected on the lifting seat (30), and the lifting driving screw rod (342) is vertically arranged.

5. The dual-lift pendulum-type offset printing mechanism as claimed in claim 3, wherein: The first transmission shaft (31) is sleeved with the first rotary clutch eccentric sleeve (35), 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 driving device (36) comprises a first rotary driving cylinder (361), the first rotary driving cylinder (361) is connected on the lifting seat (30), The first rotary clutch eccentric sleeve (35) has a first connecting swing arm (351), and the first connecting swing arm (351) is in transmission connection with the first rotary driving cylinder (361).

6. The dual-lift pendulum-type offset printing mechanism according to claim 5, wherein: The lifting seat (30) is further connected with the first eccentric sleeve rotary limiting adjustment device (38); The first rotary driving cylinder (361) has a first push-pull piston rod (3611), a first cylinder body (3612) of the first rotary driving cylinder (361) is hingedly arranged on the lifting seat (30), the first push-pull piston rod (3611) is hingedly connected with the first connecting swing arm (351), The first eccentric sleeve rotary limiting adjustment device (38) comprises a first limiting part (381), the first limiting part (381) is located at the head of a first limiting shaft moving adjustment rod (382), and the first limiting shaft moving adjustment rod (382) is arranged on the lifting seat (30).

7. The double-lift swing-arm offset printing mechanism of claim 2 or 3, wherein: The swing driving structure comprises a second transmission driving device (8), the second transmission driving device (8) comprises a third transmission shaft (83) and a fourth transmission shaft (84), The third transmission shaft (83) is connected on the first lifting swing arm (2), and the fourth transmission shaft (84) is connected on the second lifting swing arm (5), The second transmission driving device (8) further comprises a pitch adjusting device for adjusting the distance between the third transmission shaft (83) and the fourth transmission shaft (84), The pitch adjusting device comprises a screw rod and screw nut pitch adjusting transmission mechanism (80), the third transmission shaft (83) and the fourth transmission shaft (84) are connected and arranged with the screw rod and screw nut pitch adjusting transmission mechanism (80) therebetween; The pitch adjusting device and the third transmission shaft (83) and / or the fourth transmission shaft (84) are further provided with a second rotary clutch eccentric sleeve (85), and the second rotary clutch eccentric sleeve (85) is in transmission connection with a corresponding second rotary driving device (86), The corresponding second rotary driving device (86) is arranged on the first lifting swing arm (2) and / or the corresponding second rotary driving device (86) is arranged on the second lifting swing arm (5).

8. The double-lifting swing arm type offset printing mechanism according to claim 7, characterized in that: The fourth transmission shaft (84) is sleeved with the second rotary clutch eccentric sleeve (85), The lead screw and nut distance adjusting 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 in transmission connection with the second rotary drive cylinder (861).

9. The double-lifting swing arm type offset printing mechanism according to claim 8, characterized in that: The second lifting swing arm (5) is further connected with a second eccentric sleeve rotary limiting adjustment device (88), The second rotary drive cylinder (861) is provided with a second push-pull piston rod (8611), and the second cylinder body (8612) of the second rotary drive cylinder (861) is hingedly arranged on the second lifting swing arm (5), and the second push-pull piston rod (8611) is hingedly connected with the second connecting swing arm (851). The second eccentric sleeve rotary limiting adjustment device (88) comprises a second limiting part (881), and the second limiting part (881) is located at the head of a second limiting shaft adjustment rod (882), and the second limiting shaft adjustment rod (882) is arranged on the second lifting swing arm (5); The lead screw and nut distance adjusting transmission mechanism (80) comprises a lead screw support seat (801), a transmission lead screw (802) and a transmission nut (803), the transmission lead screw (802) is arranged on the lead screw support seat (801), and the transmission lead screw (802) is in transmission connection with the transmission nut (803); One of the lead screw support seat (801) and the transmission nut (803) is connected to the first lifting swing arm (2) through a third transmission shaft (83), and the other is connected to the second lifting swing arm (5) through the second rotary clutch eccentric sleeve (85) and a fourth transmission shaft (84).

10. The double-lifting swing arm type offset printing mechanism according to claim 7, characterized in that: One end of the second lifting swing arm (5) is connected to a second support shaft (50), the fourth transmission shaft (84) is located at the other end of the second lifting swing arm (5), the second support shaft (50) is connected to the rack (4), the second support shaft (50) is a second swing support shaft, and a second mounting part is located between the second support shaft (50) and the fourth transmission shaft (84); The second support shaft (50) is located at the rear side of the fourth transmission shaft (84), The second lifting swing arm (5) is further provided with a second arc-shaped guide rail (42) for swing guide support; The second swing support shaft is arranged below the first swing support shaft, The second swing support shaft is arranged at the rear side of the first swing support shaft.

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