Lifting adjusting device for coining roller of printing machine

Abstract

The utility model discloses a lifting adjusting device for coining rollers of a printing machine, and aims to solve the problems that the existing adjusting mode mainly depends on a manual mechanical structure, for example, a worm is rotated to drive a worm gear and an eccentric bearing, so that a gap between rollers is slightly changed, the adjusting process is time-consuming and labor-consuming, and the requirement on experience of operators is high. In order to solve the problems that in the prior art, in the prior art, in the prior art, rapid and accurate online pressure regulation is difficult to achieve, and the requirement for high-efficiency and automatic production cannot be met, the following scheme is provided: the device comprises a base, the top of the base is fixedly connected with a rack, the rack is provided with an electric control box, and the rack is connected with a connecting seat through a lifting mechanism; according to the utility model, a mechanism combining cylinder driving and lever amplification is adopted, the cylinder is used as a power source, the response speed is high, and the pressing-on or pressing-off action can be completed within several seconds; through the lever principle, the linear stroke of the air cylinder is effectively converted into the lifting stroke needed by the coining roller, enough output force is guaranteed, and meanwhile the ideal adjusting range is obtained.

Description

TECHNICAL FIELD

[0001] The utility model relates to be applicable to handcart, more specifically, relate to a printing press printing pressure roller lifting adjusting device. BACKGROUND

[0002] Printing press printing pressure roller adjusting technology is one of the core technologies in the field of printing machinery, and the pressure adjustment between the printing pressure roller (or called impression roller) and the plate cylinder (or platform) is the core link to ensure the printing quality.

[0003] The traditional adjusting mode mainly relies on manual mechanical structure, for example, a worm drives a worm gear and an eccentric bearing to change the gap between the rollers in a small amount, and although this kind of method has reliable structure, it is time-consuming and laborious in the adjusting process, requires high experience of the operator, and is difficult to realize rapid and accurate online pressure regulation, and cannot meet the needs of high efficiency and automatic production.

[0004] Therefore, we propose a printing press printing pressure roller lifting adjusting device. UTILITY MODEL CONTENT

[0005] One object of the utility model is to provide a new technical scheme of a printing press printing pressure roller lifting adjusting device.

[0006] According to the first aspect of the utility model, a printing press printing pressure roller lifting adjusting device is provided, which comprises a base, the top of the base is fixedly connected with a rack, an electric control box is arranged on the rack, a connecting seat is connected to the rack through a lifting mechanism, a cavity is arranged in the connecting seat, a moving seat is slidably connected in the cavity, and a printing pressure roller is arranged at the bottom of the moving seat.

[0007] It also comprises an adjusting mechanism for adjusting the printing pressure roller.

[0008] Optionally, the lifting mechanism comprises a cylinder, an adjusting plate and a connecting column, a cavity is arranged in the rack, the bottom of the cylinder is movably connected with the inner wall of one side of the cavity, the inner wall of one side of the cavity is rotatably connected with a rotating shaft through a bearing, the rotating shaft is fixedly connected with the adjusting plate, the output end of the cylinder is hingedly connected with one end of the adjusting plate, a strip-shaped hole is formed in one side of the rack and communicates with the cavity, the other end of the adjusting plate passes through the strip-shaped hole and is hingedly connected with the top of the connecting column, a pneumatic system matched with the cylinder is arranged on the rack, and the bottom end of the connecting column is fixedly connected with the top of the connecting seat.

[0009] Optionally, a sliding groove is formed in one side of the rack, a sliding block is fixedly connected to the connecting column, and the sliding block is slidably connected in the sliding groove.

[0010] Optionally, the adjusting mechanism comprises a fixed plate, a moving plate, a screw rod, a limiting column and a connecting plate, the fixed plate is fixedly connected to one side of the connecting seat, the moving plate is slidingly connected to one side of the connecting seat, the screw rod is threadedly connected with the fixed plate, the screw rod is rotationally connected with the moving plate through a bearing, the limiting column is fixedly connected to the bottom of the moving plate, a through hole is formed in the fixed plate, the limiting column passes through the through hole and is fixedly connected with the connecting plate, and the connecting plate is fixedly connected with the moving seat.

[0011] Optionally, a limiting groove is formed in the cavity, a limiting plate is fixedly connected to the top of the moving seat, and a limiting block is fixedly connected to the limiting plate and slidingly connected in the limiting groove.

[0012] Optionally, upper and lower limiting switches are fixedly connected to one side of the connecting seat.

[0013] Optionally, a fastening nut is threadedly connected to the screw rod, and the fastening nut is tightly attached to the fixed plate.

[0014] Optionally, the adjusting plate is of a telescopic structure, comprising a first rectangular plate, a second rectangular plate, an extension plate and a fixing bolt, a connecting cavity is formed in one side of the first rectangular plate, the extension plate is fixedly connected with the second rectangular plate, the extension plate is slidingly connected in the connecting cavity, a through hole is formed in the first rectangular plate, the fixing bolt is arranged in the through hole, and a plurality of threaded holes matched with the fixing bolt are formed in the extension plate.

[0015] Optionally, an ion fan is fixedly connected in the cavity, a connecting pipe is fixedly connected to the rack, a plurality of nozzles are arranged on the connecting pipe, the nozzles are obliquely arranged and correspond to the printing roller, an output end of the ion fan is communicated with the connecting pipe through a fixed pipe, and an air inlet pipe is fixedly connected to an input end of the ion fan, one end of the air inlet pipe extends to outside of the rack and is provided with a detachable filter screen.

[0016] In use, the power supply and the air source are turned on, an operator first sets the initial position (i.e. the reference point of compression) of the printing roller and the required compression depth according to the printing process requirement, loosens the locking nut on the screw rod, rotates the hand wheel, the rotation of the hand wheel is converted into axial movement of the screw rod through the trapezoidal thread transmission (due to the action of the lower end thrust bearing, the screw rod only moves axially and does not rotate), thereby driving the moving plate to accurately ascend and descend along the linear guide rail, the moving plate drives the moving seat and the printing roller to millimeter or micrometer level precision displacement through the limiting column and the connecting plate, the upper and lower limiting switches can prevent the moving plate from overtraveling during the adjustment, and the locking nut is tightened after the adjustment is completed to fix the position of the screw rod.

[0017] Transmission ratio adaptive adjustment (optional): if the production task has special requirements for lifting speed or output force, the transmission ratio of the lifting mechanism can be adjusted. The operation method is: stop and ensure that the cylinder is in the pressure relief state, unscrew the fixing bolt on the adjusting plate, and push or pull the second rectangular plate according to the requirements to change the effective working length of the adjusting plate. For example, lengthening the adjusting plate (increasing the power arm) can obtain a larger printing roller lifting stroke under the same cylinder stroke, but a larger cylinder thrust is required; on the contrary, shortening the adjusting plate. After adjusting to the appropriate length, tighten the fixing bolt.

[0018] By starting the automatic program through the touch screen of the electric control box, the electromagnetic reversing valve in the pneumatic system is controlled by the PLC, the piston rod of the cylinder is driven by the compressed air to extend or retract, the linear motion of the piston rod drives the adjusting plate to rotate around the rotating shaft in the middle through the joint bearing, and the other end of the adjusting plate is guided through the connecting column, the sliding block and the sliding groove. The lever swing is converted into the vertical large-stroke lifting motion of the connecting seat as a whole, so that the printing roller is quickly picked up (off-press) or lowered (on-press), and the lever amplification makes the cylinder with smaller stroke can realize the large-range position switching of the printing roller.

[0019] In the printing process, especially when non-conductive materials (such as film and special paper) that are easy to produce static electricity are used, the ion blower can be started. The neutralizing ion wind generated by the ion blower is uniformly blown to the surface of the rotating printing roller from multiple nozzles through the connecting pipe, effectively eliminating the static charge generated during printing, and preventing printing defects or material sticking and winding caused by static adsorption of dust.

[0020] According to one embodiment of the present disclosure, a cylinder driving combined with a lever amplification mechanism is adopted, the cylinder as a power source has fast response speed and can complete the on-press or off-press action within a few seconds; through the lever principle, the linear stroke of the cylinder is effectively converted into the lifting stroke required by the printing roller, while ensuring sufficient output force, an ideal adjustment range is obtained;

[0021] The control stroke and the pressing depth of the printing roller can be adjusted through the screw rod, which can adapt to different requirements.

[0022] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings incorporated in and forming a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application.

[0024] Fig. 1 It is a front view structural schematic diagram of a printing press printing roller lifting adjusting device in an embodiment;

[0025] It is a front view structural schematic diagram of a printing press printing roller lifting adjusting device in an embodiment;Fig. 2 It is a left view structure schematic diagram of a printing press printing roller lifting adjusting device in one embodiment;

[0026] Fig. 3 It is a connecting seat structure schematic diagram of a printing press printing roller lifting adjusting device in one embodiment;

[0027] Fig. 4 It is a connecting seat internal structure schematic diagram of a printing press printing roller lifting adjusting device in one embodiment;

[0028] Fig. 5 It is a adjusting plate separation structure schematic diagram of a printing press printing roller lifting adjusting device in one embodiment;

[0029] Fig. 6 It is an ion fan and connecting pipe structure schematic diagram of a printing press printing roller lifting adjusting device in one embodiment.

[0030] The figure is marked as follows: 1, base; 2, frame; 3, connecting seat; 4, moving seat; 5, printing roller; 6, air cylinder; 7, adjusting plate; 701, first rectangular plate; 702, second rectangular plate; 703, extension plate; 704, fixed bolt; 8, connecting column; 9, sliding groove; 10, sliding block; 11, fixed plate; 12, moving plate; 13, screw rod; 14, limiting column; 15, connecting plate; 16, upper limit switch; 17, lower limit switch; 18, limiting groove; 19, limiting plate; 20, ion fan; 21, connecting pipe. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of the components and steps set forth in the examples, as well as the numerical expressions and values, are not limitations on the scope of the present application unless otherwise specifically stated.

[0032] The following description of at least one sample embodiment is merely exemplary in nature and is in no way intended to limit the scope of the application, its application, or uses.

[0033] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and devices can be viewed as part of the specification.

[0034] In all of the examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.

[0035] As Figs. 1 to 4As shown, a printing press roller lifting and adjusting device includes a base 1, a frame 2, a connecting seat 3, a movable seat 4, and a printing press roller 5.

[0036] The base 1 is welded from thick steel plate and has anti-slip pads at the bottom to ensure stable operation of the device. The top of the base 1 is fixed with high-strength bolts to the frame 2, which is welded from square steel and steel plate and has sufficient rigidity and stability.

[0037] The internal structure of frame 2 integrates an electrical control box (not shown in the figure), which houses electrical components such as a PLC controller, relays, and power modules to control the pneumatic and electric parts of the entire device. The front panel of the control box features a touchscreen or control buttons for easy parameter setting and monitoring by operators.

[0038] The connecting seat 3 is connected to the frame 2 through a lifting mechanism, and can move up and down in a wide range in the vertical direction. The connecting seat 3 has a box-type structure with an internal cavity. The cavity has precisely machined guide surfaces on both sides. The movable seat 4 is slidably connected in the cavity and can move precisely vertically relative to the connecting seat 3. The printing roller 5 is installed at the bottom of the movable seat 4.

[0039] like Figs. 1 to 4 As shown, the lifting mechanism is used to achieve a wide range of rapid lifting of the printing roller 5, and mainly consists of a cylinder 6, an adjusting plate 7, and a connecting column 8.

[0040] The frame 2 has an internal cavity, in which a pneumatic system (not shown in the figure) is installed, including a solenoid directional valve, a speed control valve, a pressure reducing valve, and a filter. The cylinder 6 is a double-acting cylinder with a magnetic ring, which facilitates the installation of a position sensor. The bottom of the cylinder 6 is connected to one side of the inner wall of the cavity through a U-shaped hinge seat, allowing the cylinder 6 to swing slightly around the hinge point, thus avoiding the piston rod bearing lateral force.

[0041] The adjusting plate 7 is a lever made of high-strength steel plate. Its middle part is rotatably connected to the inner wall of one side of the cavity through a rotating shaft and bearing. One end of the adjusting plate 7 is hinged to the piston rod of the cylinder 6 through a rod end joint bearing. A strip hole communicating with the cavity is opened on one side of the frame 2. The other end of the adjusting plate 7 passes through the strip hole and is also hinged to the top of the connecting column 8 through a joint bearing.

[0042] Furthermore, the adjusting plate 7 is a telescopic structure, specifically including a first rectangular plate 701, a second rectangular plate 702, an extension plate 703, and a fixing bolt 704. One end of the first rectangular plate 701 has a rectangular cross-section connecting cavity. The second rectangular plate 702 is welded to the extension plate 703 as a whole. The extension plate 703 is slidably fitted in the connecting cavity. The first rectangular plate 701 has multiple through holes along its length direction, and the extension plate 703 has multiple threaded holes correspondingly. When it is necessary to adjust the effective length of the adjusting plate 7 (i.e., the distance from the center of the rotating shaft to the hinge point with the connecting column 8), loosen the fixing bolt 704 to make it exit the current threaded hole, then push and pull the second rectangular plate 702 and the extension plate 703 along the connecting cavity to the required length, and then screw the fixing bolt 704 into the aligned threaded hole and lock it to complete the fixing.

[0043] The connecting column 8 is a solid steel column, and its bottom is rigidly connected to the top of the connecting seat 3;

[0044] To ensure the vertical movement accuracy of the connecting column 8, a vertical groove 9 is machined on one side of the frame 2. A slider 10 is fixedly installed on the connecting column 8. The slider 10 is embedded with a self-lubricating copper sleeve or linear bearing, which is precisely matched with the groove 9 to form a high-precision guiding system.

[0045] When rapid lifting and lowering of the printing roller 5 is required, the operator issues a command through the electrical control box, the solenoid valve is activated, compressed air enters the corresponding chamber of the cylinder 6, pushing the piston rod to extend or retract. The linear motion of the piston rod drives the adjusting plate 7 to rotate around the shaft. The other end of the adjusting plate 7 pushes the connecting seat 3 and the entire lower mechanism to rise and fall rapidly through the connecting column 8. The design of the lever mechanism effectively amplifies the stroke of the cylinder 6, achieving a wide range of rapid adjustment.

[0046] like Figs. 1 to 4 As shown, the adjustment mechanism is used to achieve precise fine-tuning of the position of the printing roller 5, and mainly consists of a fixed plate 11, a moving plate 12, a screw 13, a limiting post 14, and a connecting plate 15.

[0047] The fixed plate 11 is vertically welded to one side of the connecting seat 3. The movable plate 12 is slidably connected to the connecting seat 3 through a linear guide rail, ensuring that the movable plate 12 can only move smoothly in the vertical direction. The screw 13 is a precision trapezoidal thread screw with an adjustment handwheel installed at the upper end, a threaded connection between the middle part and the fixed plate 11, and a thrust bearing at the lower end for rotational connection with the movable plate 12.

[0048] The limiting post 14 consists of two parallel guide posts. The upper end is fixedly connected to the moving plate 12, and the lower end passes through the through hole on the fixed plate 11 and is fixedly connected to the connecting plate 15. The connecting plate 15 is rigidly connected to the moving seat 4, so as to accurately transmit the up and down movement of the moving plate 12 to the moving seat 4.

[0049] To ensure the stability of the adjusted position, a locking nut is arranged on the screw rod 13, and when the position is adjusted to the right position, the locking nut is tightened to effectively prevent the screw rod 13 from rotating due to vibration and the like, thereby maintaining the stability of the adjusted position.

[0050] When it is necessary to accurately adjust the initial position or the pressing depth of the impression roller 5, the operator first loosens the locking nut, and then rotates the hand wheel on the screw rod 13, and rotates the hand wheel clockwise or counterclockwise, thereby driving the moving plate 12 to move up and down along the guide mechanism through threaded transmission, and the moving plate 12 drives the moving seat 4 and the impression roller 5 to accurately ascend and descend through the limiting column 14 and the connecting plate 15, and after adjustment, the locking nut is tightened to fix the position.

[0051] Further, a limiting groove 18 is arranged in the cavity of the connecting seat 3, and a limiting plate 19 is fixed to the top of the moving seat 4, and a limiting block on the limiting plate 19 is in sliding cooperation with the limiting groove 18, thereby playing a guiding role and limiting the stroke range of the moving seat 4.

[0052] An upper limiting switch 16 and a lower limiting switch 17 are mounted on one side of the connecting seat 3, and a trigger block is arranged on the moving plate 12, and when the moving plate 12 moves to the limit position, the trigger block triggers the corresponding limiting switch, and the PLC stops the adjustment action immediately after receiving the signal, thereby preventing overtravel.

[0053] A pressure reducing valve and a safety valve are arranged in the pneumatic system to ensure that the working pressure is within a safe range, and the solenoid valve is of a middle closed type, and the position of the cylinder 6 is kept unchanged in the case of power failure.

[0054] The ion air blower 20 for removing static electricity from the impression roller 5 is also included, and the ion air blower 20 is fixedly installed in the cavity of the rack 2, the ion air blower 20 is in communication with the connecting pipe 21 through a flexible fixed pipe, the connecting pipe 21 is horizontally fixed on the side of the rack 2 facing the impression roller 5, a plurality of inclined nozzles are uniformly arranged on the connecting pipe 21 along the length direction, the outlet direction of the nozzles is aligned with the roller surface of the impression roller 5, the air inlet end of the ion air blower 20 is connected with an air inlet pipe, the air inlet pipe extends to the outside of the rack 2, and a detachable primary filter screen is arranged at the end of the air inlet pipe.

[0055] However, the working principles and wiring methods of the cylinder 6, the ion air blower 20 and the electric control box are common, as known to those skilled in the art, and they all belong to conventional means or common knowledge, and thus will not be described here again, and those skilled in the art can make any selection according to their needs or convenience.

[0056] The drawings in the specification of the present application are only schematic in nature, and the sizes and shapes of the components shown in the drawings are not actual limits, but are only a kind of schematic representation. In the actual implementation process, the components can be reasonably configured and adjusted according to specific needs and actual situations.

[0057] While specific embodiments of the application have been described in detail, those familiar with the art will appreciate that the examples given are by way of example and are not meant to limit the scope of the application. Those skilled in the art will recognize or be able to ascertain using no more than routine experimentation, many equivalents to the specific embodiments of the application described herein. It is therefore intended that the scope of the application be determined by the following claims.

Claims

1. A printing press impression roller lift adjustment device characterized by: It include base (1), the top of base (1) is fixedly connected with rack (2), the rack (2) is equipped with electric control box, the rack (2) is connected with connecting seat (3) through lifting mechanism, the connecting seat (3) is equipped with cavity, the cavity is slidably connected with moving seat (4), the bottom of moving seat (4) is equipped with printing roller (5); It further includes adjusting mechanism for adjusting printing roller (5).

2. A printing press impression cylinder lift adjustment device as claimed in claim 1, wherein: The lifting mechanism includes cylinder (6), adjusting plate (7) and connecting column (8), the rack (2) is equipped with cavity, the bottom of cylinder (6) is movably connected with the inner wall of one side of cavity, the inner wall of one side of cavity is rotatably connected with pivot, the pivot is fixedly connected with adjusting plate (7), the output end of cylinder (6) is hingedly connected with one end of adjusting plate (7), one side of rack (2) is provided with strip-shaped hole which is communicated with cavity, the other end of adjusting plate (7) passes through strip-shaped hole and is hingedly connected with the top of connecting column (8), the rack (2) is equipped with pneumatic system which is matched with cylinder (6), the bottom end of connecting column (8) is fixedly connected with the top of connecting seat (3).

3. A printing press impression cylinder lift adjustment device as claimed in claim 2, wherein: One side of rack (2) is provided with sliding groove (9), the connecting column (8) is fixedly connected with sliding block (10), the sliding block (10) is slidably connected in sliding groove (9).

4. The printing press impression cylinder lift adjustment device of claim 1 wherein: The adjusting mechanism includes fixed plate (11), moving plate (12), screw rod (13), limiting column (14) and connecting plate (15), the fixed plate (11) is fixedly connected with one side of connecting seat (3), the moving plate (12) is slidably connected with one side of connecting seat (3), the screw rod (13) is threadedly connected with fixed plate (11), the screw rod (13) is rotatably connected with moving plate (12) through bearing, the limiting column (14) is fixedly connected with the bottom of moving plate (12), the fixed plate (11) is provided with through hole, the limiting column (14) passes through through hole and is fixedly connected with connecting plate (15), the connecting plate (15) is fixedly connected with moving seat (4).

5. The printing press impression cylinder lift adjustment device of claim 1 wherein: The cavity is provided with limiting groove (18), the top of moving seat (4) is fixedly connected with limiting plate (19), the limiting plate (19) is fixedly connected with limiting block, the limiting block is slidably connected in limiting groove (18).

6. A printing press impression cylinder lift adjustment device as claimed in claim 4, wherein: One side of connecting seat (3) is fixedly connected with upper limit switch (16) and lower limit switch (17).

7. A printing press impression cylinder lift adjustment device as claimed in claim 4 wherein: The screw rod (13) is threadedly connected with fastening nut, the fastening nut is closely attached with fixed plate (11).

8. The printing press impression cylinder lift adjustment device of claim 2 wherein: The adjusting plate (7) is of telescopic structure, comprising a first rectangular plate (701), a second rectangular plate (702), an extension plate (703) and a fixing bolt (704), one side of the first rectangular plate (701) is provided with a connecting cavity, the extension plate (703) is fixedly connected with the second rectangular plate (702), the extension plate (703) is slidably connected in the connecting cavity, a through hole is formed in the first rectangular plate (701), the fixing bolt (704) is arranged in the through hole, and a plurality of threaded holes matched with the fixing bolt (704) are formed in the extension plate (703).

9. The printing press impression cylinder lift adjustment device of claim 1 wherein: The ion fan (20) is fixedly connected in the cavity, the connecting pipe (21) is fixedly connected to the rack (2), a plurality of nozzles are arranged on the connecting pipe (21), the nozzles are arranged obliquely and correspond to the impression roller (5), the output end of the ion fan (20) is communicated with the connecting pipe (21) through a fixing pipe, and the input end of the ion fan (20) is fixedly connected with an air inlet pipe, one end of the air inlet pipe extends to the outside of the rack (2) and is provided with a detachable filter screen.

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