A printing press

Abstract

The present application relates to a printing press, belonging to the field of printing technology. It comprises an initial pickup assembly, a secondary pickup assembly, a paper feed roller, and a mounting frame. A mounting platform for mounting the initial pickup assembly is slidably mounted on the mounting frame along the conveying direction of the paper feed roller. The initial pickup assembly comprises an initial pickup knife, an adjustment drive member that drives the initial pickup knife to move vertically, and an initial pickup drive member that drives the initial pickup knife to insert horizontally into a paper pile. The initial pickup knife is provided in multiple locations and is arranged on both sides of the paper conveying direction. The secondary pickup assembly comprises a push rod, a height adjustment drive member that drives the push rod to move vertically to abut against the paper on the initial pickup assembly, and a paper feed drive member that drives the push rod to push the paper into the paper feed roller. The present application has a better effect in conveying thin paper.

Description

Technical Field

[0001] The present application relates to the field of printing, and in particular to a printing press. Background Art

[0002] A printing press is a mechanical device that presses an inked surface against a medium (such as paper or fabric) to create an image. Six-color printing presses improve upon four-color printing by adding two spot colors for full-color reproduction. Six-color printing presses can print a wide range of materials, depending on the type of press, including non-woven fabrics, self-adhesive stickers, and stickers.

[0003] A printing press usually consists of two main parts: a paper feeding system and a printing system. The paper feeding system needs to feed the printing paper into the printing system in a certain form for printing. The paper feeding system of an existing printing press is usually implemented by a conveyor belt. The paper at the bottom is transported one by one. A material feeding device is passed above the conveyor belt to limit the paper transported to one piece at a time, thereby achieving continuous paper feeding.

[0004] The existing paper feeding system is not very effective in feeding thinner and lighter paper. It is easy for multiple sheets of paper to be fed in each time, especially when too much paper is piled up and the lower layer of paper is under greater pressure. Summary of the Invention

[0005] In order to better convey thinner paper, the present application provides a printing press.

[0006] The printing press provided in this application adopts the following technical solution:

[0007] A printing press includes an initial pickup component, a secondary pickup component, a paper feed roller and a mounting frame, wherein a mounting platform for mounting the initial pickup component is slidably mounted along the conveying direction of the paper feed roller, the initial pickup component includes an initial pickup knife and an adjustment drive component that drives the initial pickup knife to move vertically, and an initial pickup drive component that drives the initial pickup knife to insert horizontally into a paper pile, the initial pickup knife is at least two and is arranged on both sides of the paper conveying direction, the secondary pickup component includes a push rod and a height adjustment drive component that drives the push rod to move vertically to abut against the paper on the initial pickup component, and a paper feed drive component that drives the push rod to push the paper into the paper feed roller.

[0008] By adopting the above technical solution, a certain amount of paper is first taken out from the paper pile each time by the initial taking component, so that the paper pile directly used for paper feeding will not be too thick, thereby solving the problem of excessive pressure on the lower paper, and then the paper is pushed into the paper feed roller in turn by the pushing rod of the re-taking component, and the paper feeding operation is completed by the paper feed roller. By adding a paper taking process, the problem of excessive friction between the papers due to the initial thickness of the paper pile and the increased gravity during the paper feeding process is alleviated, and the need to add paper multiple times in a short period of time due to the small amount of paper in the paper pile is not required.

[0009] Optionally, a decompression assembly is also included, which includes a decompression knife, a decompression drive that drives the decompression knife to move vertically, and a decompression preparation drive that drives the decompression knife to enter the paper pile on the initial taking assembly. There are at least two decompression knives, and the two decompression knives are arranged in front and behind the paper transportation direction.

[0010] By adopting the above technical solution and setting a decompression component, before the pushing rod pushes the paper, the decompression component can further lift a part of the paper, so that the downward pressure on the paper pushed by the pushing rod is smaller and the pushing is more stable. Then the decompression component can put down another part of the paper after each part of the paper is sent, so as to achieve fast paper feeding, increase the interval time for taking paper from the paper pile, and indirectly improve the paper feeding efficiency. Then the decompression component and the initial taking component are set in different directions, so as not to interfere with each other. The position of the initial taking component will not hinder the transportation of paper, while the decompression component has the opposite effect, and has the function of preventing the transportation of the lifted paper, thereby maintaining the stability of paper feeding.

[0011] Optionally, the primary picking knife includes an active primary picking knife and a passive primary picking knife, one active primary picking knife and one passive primary picking knife form a group and are arranged on both sides of the paper transport direction, there are four primary picking knives in two groups and arranged along the paper transport direction, the active primary picking knife includes a knife housing, a soft blade and a soft blade driving member, the knife housing is provided with a primary blade hole for sliding installation of the soft blade, the end of the soft blade close to the paper pile is provided with a knife head, the knife housing is provided with a knife head groove for the knife head to be embedded, the knife head cooperates with the knife housing to form a blade-like structure with a thinner end, the soft blade driving member drives the soft blade to pass through the paper pile and the end is exposed, the passive primary picking knife includes an electromagnet blade, the lower side wall of the electromagnet blade is provided with an adsorption groove for the knife head to be embedded, and the side of the electromagnet blade close to the paper pile is provided with a guide slope.

[0012] By adopting the above technical solution, the blade head and blade shell on the soft blade cooperate to form a blade-like structure with a thinner end, which is used for the active initial picking knife to be better inserted into the paper pile in the initial state, and then the soft blade is pushed by the soft blade driving member to further insert into the paper pile, and finally pass through the paper pile and connect with the electromagnet blade by adsorption, and then the electromagnet blade is inserted into the paper pile again, thereby ensuring that the matching active initial picking knife and passive initial picking knife are inserted into the paper pile of the same layer, making the equipment more stable during operation, and less likely to have different papers supported on both sides of the paper pile, resulting in part of the paper being taken out by the initial picking component but falling on the unstable side, ensuring that the active initial picking knife and the passive initial picking knife can cooperate to better take out the paper, and the guide bevel provided on the electromagnet blade allows the electromagnet blade to be inserted into the paper pile more smoothly. At the same time, the presence of the soft blade can better support the taken out paper, ensure the flatness of the bottom of the paper, and facilitate the re-picking component to feed the paper into the paper feed roller.

[0013] Optionally, the passive initial knife also includes a soft blade locking assembly, which includes a pressing plate and a pressing plate driving component. Connecting parts are provided on both sides of the pressing plate. The connecting parts are rotatably installed on the side wall of the electromagnet blade away from the paper pile. The pressing plate driving component drives the pressing plate to flip and abut against the soft blade.

[0014] By adopting the above technical solution, the soft blade locking assembly is used to better fix the soft blade and the electromagnetic blade together, thereby improving the supporting effect of the soft blade on the paper pile. At the same time, the soft blade is fixed by the flipping of the pressing plate. The thickness of the soft blade changes after the blade head is embedded in the adsorption groove, and the fixing effect is better. The adsorption process of the soft blade will not be affected before the pressing plate is flipped. Compared with the pressing plate sliding in from the side, the adaptability is better and it is not easy to make mistakes and interfere.

[0015] Optionally, the soft blade is curved in an upward arc.

[0016] By adopting the above technical solution, the space requirement on both sides of the equipment is reduced, and the upward arc bending of the soft blade is not likely to affect the movement of the soft blade in the blade housing.

[0017] Optionally, a guide shell is provided on the side of the blade housing that is curved and extended away from the paper pile, and the soft blade is installed in the guide shell. The guide shell is in the shape of a quarter arc, and the tangent of the lower side of the guide shell is in the same straight line as the movement direction of the blade head, and the end of the soft blade away from the blade head is always located in the guide shell.

[0018] By adopting the above technical solution, the guide shell is provided for the placement of the soft blade, and the soft blade is restricted by the guide shell so that the soft blade is restricted and not easily deformed, thereby better passing through the blade shell. At the same time, the quarter-arc-shaped setting allows the soft blade to maintain a deformed state downward and toward the blade shell when moving downward, making it less likely to deform when pushed, and the direction of force applied is also more appropriate, cooperating with the guide shell to keep the soft blade moving in the guide shell.

[0019] Optionally, the soft blade drive component includes a sliding seat, a sliding motor, a sliding gear and a rack, the rack is fixed to the guide shell and extends along the length direction of the guide shell, the sliding seat is slidably installed on the guide shell and slides along the extension direction of the guide shell, the sliding seat is fixed to one end of the soft blade away from the cutter head, the sliding motor is installed on the sliding seat, and the sliding gear is fixed on the output shaft of the sliding motor and engages with the rack.

[0020] By adopting the above technical solution, the sliding seat is installed on the guide shell to drive the soft blade, so that when the active initial knife is taken out, it will not affect the driving effect of the soft blade driving part on the soft blade. The soft blade driving part does not need to move by itself to maintain coordination with the soft blade, and then through the cooperation of the sliding gear and the rack, the sliding on the guide shell under the sliding seat is realized, thereby driving the soft blade to move.

[0021] Optionally, a pressure rod is provided in the guide shell, the pressure rod abuts the soft blade, the end of the pressure rod is rotatably mounted on the inner wall of the guide shell, and the pressure rod is folded along the width direction of the guide shell, and the end of the pressure rod remains in abutment with the soft blade after being folded.

[0022] By adopting the above technical solution and setting the pressure rod, the movement trajectory of the soft blade is better restricted, and the soft blade is restricted and less likely to deform, especially when the soft blade is extracted from the knife shell, it is better restricted and less likely to deform. At the same time, the pressure rod is rotatably installed on the inner wall of the guide shell, so that the pressure rod will not hinder the sliding of the sliding seat, and the sliding seat pushes the pressure rod away in sequence when sliding. At the same time, since the folded rear end of the pressure rod keeps in contact with the soft blade, and the guide shell is part of the arc, the pressure rod will not hinder the reverse sliding movement of the sliding seat when the soft blade is extracted. When the soft blade is extracted from the knife shell, the pressure rod resets after the sliding seat passes, and then pushes the soft blade to resume the state of abutting with the guide shell. In this process, the part of the soft blade in the parallel state is easier to apply force to pull, and then the soft blade is bent again by applying force through the pressure rod to form an arc state. The whole process is more stable and the soft blade is not easily damaged.

[0023] Optionally, the end of the push rod is provided with an adsorption disk and connected to an air pump, there are four re-taking components, two of the re-taking components form a set, the two sets of the re-taking components move alternately, and one set of the re-taking components is located between the other set of the re-taking components.

[0024] By adopting the above technical solution, the two sets of re-taking components can alternately feed the paper into the paper feed roller without interfering with each other, thereby improving the paper feeding efficiency. The suction plate can not only better absorb the paper to achieve paper feeding, but also keep the subsequent paper stable. The two sets of re-taking components alternately feed paper with higher efficiency. The suction plate of one set of re-taking components that feeds paper plays the role of adsorbing and feeding the paper, and the other set plays the role of adsorbing and hindering the accompanying movement. Finally, the adsorption process of the suction plate can also play the role of detecting whether there is any paper, so that in the process of feeding the last piece of paper, more paper can be further put down, and the overall efficiency is higher.

[0025] Optionally, a baffle is further included, wherein the baffle is located between the paper pile and the paper feed roller, and the height of the baffle is only enough for one sheet of paper to pass through.

[0026] By adopting the above technical solution, the setting of the shielding plate is used to further prevent two sheets of paper from entering the paper feed roller at the same time.

[0027] To sum up, the initial taking component takes out a certain amount of paper from the paper pile each time, so that the paper pile directly used for paper feeding will not be too thick, thereby solving the problem of excessive pressure on the lower paper, and then the paper is pushed into the paper feed roller in turn through the pushing rod of the re-taking component, and the paper feeding operation is completed by the paper feed roller. By adding a paper taking process, the problem of excessive friction between the papers due to the initial thickness of the paper pile and the increased gravity during the paper feeding process is alleviated, and the need to add paper multiple times in a short time due to the small amount of paper in the paper pile will not occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the structure of the paper feeding system of the printing press according to the embodiment of the present application;

[0029] Figure 2 Schematic diagram of the structure of the mounting frame and components mounted thereon in an embodiment of the present application;

[0030] Figure 3 Schematic diagram of the structure of the mounting plate and the components mounted thereon in an embodiment of the present application;

[0031] Figure 4 This is a schematic diagram of the structure of the active initial knife removal in the embodiment of the present application;

[0032] Figure 5 It is a cross-sectional view of the active initial knife removal in the embodiment of the present application;

[0033] Figure 6 is a cross-sectional view of the installation of the pressure rod in the embodiment of the present application;

[0034] Figure 7 is a cross-sectional view of the installation of the soft blade drive member in the embodiment of the present application;

[0035] Figure 8 is a cross-sectional view of a passive initial knife removal in an embodiment of the present application;

[0036] Figure 9 Schematic diagram of the structure of the pressure reducing assembly in the embodiment of the present application;

[0037] Figure 10 Schematic diagram of the structure of the re-taking assembly and the paper feed roller in the embodiment of the present application;

[0038] Figure 11 It is a schematic diagram of the installation structure of the push rod in the embodiment of the present application.

[0039] Explanation of reference numerals: 1. Initial removal assembly; 11. Active initial removal blade; 111. Blade housing; 1111. Initial blade hole; 1112. Blade head groove; 112. Soft blade; 1121. Blade head; 113. Soft blade driver; 1131. Sliding seat; 11311. Sliding block protrusion; 11312. Connecting protrusion; 1132. Sliding motor; 1133. Sliding gear; 1134. Rack; 12. Passive initial removal blade; 121. Electromagnetic blade; 1211. Adsorption groove; 1212. Guide slope; 122. Pressing plate; 1221. Connecting portion; 123. Pressing plate driver; 13. Initial removal driver; 14. Deployment driver; 15. Deployment block; 16. Removal column; 17. Guide shell; 171, connecting rod; 172, pressure rod; 1721, elastic column; 1722, sleeve rod; 174, guide groove; 175, slide rail; 2, pressure relief assembly; 21, pressure relief knife; 22, pressure relief drive; 23, pressure relief preparation drive; 24, pressure relief preparation block; 25, slide rod; 26, pressure relief block; 3, re-taking assembly; 31, push rod; 32, height adjustment drive; 33, paper feed drive; 34, paper feed slide rail; 35, adsorption plate; 36, first connecting rod; 37, second connecting rod; 4, baffle; 5, paper feed roller; 6, mounting frame; 61, ground rail; 62, column; 63, top frame; 7, mounting table; 8, adjustment drive; 9, position sensor. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-11 This application is described in further detail.

[0041] The embodiment of the present application discloses a printing press.

[0042] Reference Figure 1 A printing press includes an initial take-out assembly 1, a decompression assembly 2, a re-take-out assembly 3, a baffle 4, a paper feed roller 5 and a mounting frame 6. The mounting frame 6 is for installing the initial take-out assembly 1, the decompression assembly 2 and the re-take-out assembly 3. The initial take-out assembly 1 is used to take out some paper from a paper pile. The decompression assembly 2 is used to lift the upper part of the taken-out paper to reduce the squeezing of the lower part of the paper. The re-take-out assembly is used to push the paper at the bottom of the initial take-out assembly 1 onto the paper feed roller 5. The baffle 4 is used to limit the paper fed into the paper feed roller 5 so that only one sheet of paper can be fed in at a time. The paper feed roller 5 feeds the paper into the printing part of the printing press for printing.

[0043] Reference Figure 1 and Figure 2The mounting frame 6 includes a ground rail 61, a column 62 and a top frame 63. There are four columns 62. The ground rail 61 is laid on the ground on one side of the paper on the paper feed roller 5. The conveying direction is consistent with the paper conveying direction. The ground rail 61 is composed of two rails. The paper pile is placed between the two rails on the side of the ground rail 61 away from the paper feed roller 5. The paper pile is placed on a flat plate that can be transported by a hydraulic transport truck. The four columns 62 are arranged at four corners and mounted on the ground rail 61 so that the four columns 62 can move along the paper conveying direction. The top frame 63 is welded by four steel rods and fixed on the four columns 62. A mounting platform 7 is slidably installed on the mounting frame 6. The mounting platform 7 can slide vertically in the area where the top frame 63 is located. Specifically, notches are opened at the four corners of the mounting platform 7 and ball bearings are installed. The ball bearings abut against the side walls of the columns 62 to realize the vertical sliding of the mounting platform 7.

[0044] Reference Figure 2 and Figure 3 The initial picking component 1 includes a initial picking knife, an adjustment drive member 8 that drives the initial picking knife to move vertically, a initial picking drive member 13 that drives the initial picking knife to insert horizontally into the paper pile, and an expansion drive member 14 that drives the initial picking knife to move along the paper conveying direction. There are at least two initial picking knives and they are arranged on both sides of the paper conveying direction. In this embodiment, there are four initial picking knives including an active initial picking knife 11 and a passive initial picking knife 12. An active initial picking knife 11 and a passive initial picking knife 12 form a group and are arranged on both sides of the paper conveying direction. The four initial picking knives are divided into two groups and arranged along the paper conveying direction, and the two active initial picking knives 11 can be located on the same side or on different sides. In this embodiment, the two active initial picking knives 11 are located on the same side.

[0045] The initial taking drive member 13 and the expansion drive member 14 both adopt oil cylinders. The lower side wall of the mounting platform 7 is slidably installed with an expansion block 15 in the direction of paper conveying. The expansion drive member 14 is fixed on the mounting platform 7 and drives the expansion block 15 to slide by the piston rod. The number of expansion blocks 15 is consistent with the number of initial taking knives, both of which are four and arranged in one-to-one correspondence. The corresponding number of expansion drive members 14 is also four. The four expansion drive members 14 drive the four expansion blocks 15 in one-to-one correspondence. The two expansion blocks 15 on the same side are located between the two expansion drive members 14. The number of initial taking drive members 13 is also four. The four initial taking drive members 13 are installed in one-to-one correspondence on the four expansion blocks 15. A taking column 16 is slidably installed on the expansion block 15 along the driving direction of the initial taking drive member 13. One end of the taking column 16 is connected to the expansion block 15 and the other end extends downward for the installation of the initial taking knife. The initial taking drive member 13 drives the initial taking knife to move by driving the taking column 16.

[0046] Reference Figure 1 and Figure 2In this embodiment, the adjusting drive member 8 is preferably an electric hoist, and a winch can also be used. The adjusting drive member 8 is connected to the mounting platform 7, thereby driving the initial knife installed on the mounting platform 7 to move vertically, and a position sensor 9 is provided on the column 62 to control the height of the mounting platform 7. At the same time, the adjusting drive member 8 can be directly installed on the ceiling, or a bracket with a sliding function can be selected for the installation of the adjusting drive member 8 so that the adjusting drive member 8 is located above the mounting frame 6. The latter is selected in this embodiment.

[0047] Reference Figure 4 and Figure 5 The active initial knife 11 includes a knife shell 111, a soft blade 112 and a soft blade driving member 113. The knife shell 111 is flat, and a primary blade hole 1111 is horizontally opened in the knife shell 111. The soft blade 112 is a thin steel blade with good flexibility. A knife head 1121 is integrally provided at one end of the soft blade 112. The knife head 1121 partially protrudes along the thickness direction. The soft blade 112 is slidably installed in the primary blade hole 1111. The knife shell 111 expands outward from the opening of the primary blade hole 1111 toward the paper to form a knife head groove 1112 for the protruding part of the knife head 1121 to be embedded. The knife head 1121 fills the primary blade hole 1111 and the knife head groove 1112 and limits the soft blade 112 to set one end of the knife head 1121 to be separated from the primary blade hole 1111. At the same time, the soft blade 112 and the knife shell 111 cooperate to form a blade-like structure with a thinner end.

[0048] Reference Figure 5 and Figure 6The blade housing 111 is bent and extended on one side away from the blade slot 1112 to provide a guide housing 17 for the soft blade 112 to be placed. The guide housing 17 is in a quarter arc shape. The tangent line of the lower side of the guide housing 17 is in the same straight line as the movement direction of the blade housing 111. The top of the guide housing 17 is fixed to the column 16 through a connecting rod 171, thereby ensuring the firmness of the installation of the guide housing 17. The end of the soft blade 112 away from the blade 1121 is driven by the soft blade driving member 113 to push the blade 1121 moves in the paper pile, and the end of the soft blade 112 away from the cutter head 1121 is always located in the guide shell 17. The cross section of the guide shell 17 is U-shaped, and the opening of the primary blade hole 1111 away from the cutter head groove 1112 is smoothly connected to the inner wall of the guide shell 17. At the same time, the two inner side walls of the guide shell 17 are arranged along the extension direction of the guide shell 17. A plurality of pressure rods 172 are arranged on the two inner side walls of the guide shell 17. The pressure rods 172 on the two inner side walls of the guide shell 17 are arranged one by one. The pressure rods 172 include an elastic column 1 721 and a sleeve rod 1722 sleeved outside the elastic column 1721, a ball bearing is installed at the end of the sleeve rod 1722, and a guide groove 174 is opened on the inner wall of the guide shell 17. There are multiple guide grooves 174, and the multiple guide grooves 174 correspond to the pressure rod 172. The guide groove 174 consists of two sections, and the two sections of the guide groove 174 extend in different directions. The elastic column 1721 passes through the bottom of the guide groove 174 and is glued and fixed. The elastic column 1721 is located at the intersection of the two sections of the guide groove 174. The sleeve rod 172 One end of the sleeve 1722 is located in the guide groove 174. The presence of the elastic column 1721 allows the sleeve rod 1722 to be elastically moved. The setting of the guide groove 174 limits the direction of movement of the sleeve rod 1722. When the pressure rod 172 is not moved, the soft blade 112 is clamped between the pressure rod 172 and the inner bottom wall of the guide housing 17. The pressure rod 172 can be moved to both sides. When the pressure rod 172 abuts the inner side wall of the guide housing 17, the soft blade 112 is still clamped between the pressure rod 172 and the inner bottom wall of the guide housing 17.

[0049] Reference Figure 4 and Figure 7The soft blade drive member 113 includes a sliding seat 1131, a sliding motor 1132, a sliding gear 1133 and a rack 1134. There are two racks 1134, which are arranged on the upper side of the two side plates of the guide shell 17 in a one-to-one correspondence. The racks 1134 extend along the length direction of the guide shell 17. The two outer side walls of the guide shell 17 are extended with slide rails 175 for sliding installation of the sliding seat 1131. The interior of the sliding seat 1131 is hollow for installing the sliding motor 1132 and the sliding gear 1133. The lower part of the sliding seat 1131 A slider protrusion 11311 is protruded from the side wall, and the slider protrusion 11311 slides and cooperates with the slide rail 175 on the guide shell 17. A connecting protrusion 11312 is also protruded from the lower side wall of the sliding seat 1131. The connecting protrusion 11312 is fixed with screws to the end of the soft blade 112 away from the cutter head 1121. The sliding motor 1132 adopts a double-headed motor, and the sliding gear 1133 has two motor shafts corresponding to each other. The two sliding gears 1133 and the two racks 1134 correspond to each other one by one.

[0050] The soft blade 112 is driven by the soft blade driving member 113 to pass through the paper pile and expose the end thereof.

[0051] It should be noted that the two active primary-picking knives 11 are inserted into the paper stack side by side and abut against each other. At the same time, the knife heads 1121 of the two active primary-picking knives 11 extend and abut against each other, and can be fastened to make the two active primary-picking knives 11 as related as possible, so that they are inserted into the same layer as much as possible when inserting into the paper stack.

[0052] Reference Figure 8 The passive initial knife 12 includes an electromagnetic blade 121 and a soft blade 112 locking assembly. The part of the electromagnetic blade 121 close to the paper pile is overhanging and flat. The lower side wall of the electromagnetic blade 121 is provided with an adsorption groove 1211 for the cutter head 1121 to be embedded. The side of the electromagnetic blade 121 close to the paper pile is provided with a guide slope 1212. The soft blade 112 locking assembly includes a pressing piece 122 and a pressing piece driving part 123. Connecting parts 1221 are provided on both sides of the pressing piece 122. The two connecting parts 1221 rotate The pressing plate 122 is movable and installed on the side wall of the electromagnetic blade 121 away from the paper pile. The pressing plate driving member 123 can be a cylinder. One end of the pressing plate driving member 123 is hinged to the electromagnetic blade 121, and the piston rod at the other end of the pressing plate driving member 123 is hinged to the middle part of the pressing plate 122. The pressing plate driving member 123 drives the pressing plate 122 to flip and abut against the soft blade 112, and the cutter head 1121 is located on the side of the pressing plate 122 away from the paper pile, thereby limiting the soft blade 112. The electromagnetic blade 121 can control whether to electromagnetically adsorb the soft blade 112.

[0053] Reference Figure 3 and Figure 9The decompression assembly 2 includes a decompression knife 21, a decompression driving member 22 for driving the decompression knife 21 to move vertically, and a decompression preparation driving member 23 for driving the decompression knife 21 to enter the paper pile on the initial taking assembly 1. There are at least two decompression knives 21. In this embodiment, there are four decompression knives 21. The four decompression knives 21 are arranged in pairs in front and behind the paper transportation direction. The decompression preparation driving member 23 adopts an oil cylinder. The lower side wall of the mounting platform 7 is slidably installed with a decompression preparation block 24 along the paper transportation direction. The decompression preparation driving member 23 is fixed on the mounting platform 7 and drives the decompression preparation block 24 to slide by the piston rod, decompression The number of preparation blocks 24 is consistent with the number of pressure reducing knives 21, both of which are four and arranged in one-to-one correspondence. The number of corresponding pressure reducing driving members 22 is also four. A slide bar 25 is vertically fixed on the pressure reducing preparation block 24, and the upper end of the slide bar 25 is fixed to the pressure reducing preparation block 24. The pressure reducing knife 21 is flat and blade-shaped on the side facing the paper. A pressure reducing block 26 is slidably installed on the slide bar 25 for the pressure reducing knife 21 to be installed. The pressure reducing driving member 22 can adopt a winch driven by a motor. There are four corresponding pressure reducing driving members 22, and the four pressure reducing driving members 22 are installed in the four pressure reducing preparation blocks 24 in one-to-one correspondence.

[0054] It should be noted that the lower end of the slide bar 25 is higher than the lower end of the column 16, so that the decompression assembly 2 can limit excessive paper from being driven into the paper feed roller 5 without hindering paper feeding.

[0055] Reference Figure 1 、 Figure 10 and Figure 11 The re-taking component 3 includes a pushing rod 31 and a height adjustment driving member 32 that drives the pushing rod 31 to move vertically to abut against the paper on the initial taking component 1, and a paper feeding driving member 33 that drives the pushing rod to push the paper into the paper feeding roller 5. In this embodiment, there are four re-taking components 3, two re-taking components 3 form a set, and the two sets of re-taking components 3 move alternately, and one set of re-taking components 3 is located between the other set of re-taking components 3. Four paper feeding slides 34 are installed on the ground along the paper feeding direction, and a paper feeding slider is installed on each paper feeding slide 34 for four height adjustment driving members 32 to be installed. In this embodiment, the height adjustment driving member 32 is preferably a cylinder The top of the push rod 31 is provided with an adsorption plate 35 and is connected to the air pump, so that when the adsorption plate 35 is in contact with the paper, the paper can be firmly adsorbed by the air pump through the air pump.

[0056] In this embodiment, the same set of re-taking components 3 uses the same paper feeding drive 33, which is preferably an oil cylinder. The paper feeding drive 33 of the two sets of re-taking components 3 are stacked up and arranged on the ground. The two pushing rods 31 on the inner side are connected by a first connecting rod 36, and the piston rod end of the paper feeding drive 33 at the bottom is fixed to the first connecting rod 36. The two pushing rods 31 on the outer side are connected by a U-shaped second connecting rod 37, and the piston rod end of the paper feeding drive 33 at the top is fixed to the second connecting rod 37. Since the second connecting rod 37 is located on the side of the pushing rod 31 away from the paper feeding roller 5, the two sets of re-taking components 3 are associated with each other without interfering with the movement of the other group.

[0057] Reference Figure 10 The paper feed roller 5 is a roller conveyor belt, and the baffle 4 is installed on the frame of the paper feed roller 5. The baffle 4 is located above the first roller of the paper feed roller 5, and the distance between the baffle 4 and the first roller of the paper feed roller 5 is greater than the thickness of a piece of paper and less than the sum of the thicknesses of two pieces of paper.

[0058] The implementation principle of a printing machine in an embodiment of the present application is as follows: when in use, the height of the mounting platform 7 needs to be stable, and the paper picking position can be controlled within a certain range, so the position sensor 9 is mainly aimed at the maximum height of the mounting platform 7. First, a certain thickness of paper is taken out from the paper pile through the initial picking component 1, and then a certain thickness of paper is taken out from the taken out paper through the decompression component 2. The paper is fed into the paper feed roller 5 in sequence through the re-picking component 3. When it is detected that there is no paper to be adsorbed, a certain amount of paper is released again through the decompression component 2. When there is no paper after two consecutive adsorptions, the mounting platform 7 is moved and paper is taken from the paper pile again.

[0059] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A printing press, characterized in that: The invention comprises an initial pickup component (1), a secondary pickup component (3), a paper feed roller (5) and a mounting frame (6); a mounting platform (7) for mounting the initial pickup component (1) is slidably mounted on the mounting frame (6) along the conveying direction of the paper feed roller (5); the initial pickup component (1) comprises an initial pickup knife and an adjustment drive component (8) for driving the initial pickup knife to move vertically and an initial pickup drive component (13) for driving the initial pickup knife to insert horizontally into a paper pile; the initial pickup knife is at least two and is arranged on both sides of the paper conveying direction; the secondary pickup component (3) comprises a push rod (31) and a height adjustment drive component (32) for driving the push rod (31) to move vertically to abut against the paper on the initial pickup component (1) and a paper feed drive component (33) for driving the push rod (31) to push the paper into the paper feed roller (5); The invention also includes a decompression assembly (2), wherein the decompression assembly (2) includes a decompression knife (21), a decompression driving member (22) for driving the decompression knife (21) to move vertically, and a decompression preparation driving member (23) for driving the decompression knife (21) to enter the paper pile on the initial taking assembly (1), wherein the decompression knife (21) is at least two, and the two decompression knives (21) are respectively arranged at the front and rear of the paper transport direction; The primary picking knife comprises an active primary picking knife (11) and a passive primary picking knife (12), wherein the active primary picking knife (11) and the passive primary picking knife (12) form a group and are arranged on both sides of the paper transport direction, and the primary picking knife has four primary picking knives in two groups and is arranged along the paper transport direction. The active primary picking knife (11) comprises a knife housing (111), a soft blade (112) and a soft blade driving member (113), the knife housing (111) is provided with a primary blade hole (1111) for sliding installation of the soft blade (112), and a knife head (1121) is provided at the end of the soft blade (112) near the paper pile. (111) is provided with a blade slot (1112) for the blade head (1121) to be embedded, the blade head (1121) cooperates with the blade housing (111) to form a blade-like structure with a thinner end, the soft blade driving member (113) drives the soft blade (112) to pass through the paper pile and expose the end, the passive initial knife (12) includes an electromagnet blade (121), the lower side wall of the electromagnet blade (121) is provided with an adsorption slot (1211) for the blade head (1121) to be embedded, and the side of the electromagnet blade (121) close to the paper pile is provided with a guide slope (1212).

2. A printing press according to claim 1, characterized in that: The passive initial knife (12) further comprises a soft blade (112) locking assembly, the soft blade (112) locking assembly comprising a pressing plate (122) and a pressing plate driving member (123), connecting portions (1221) being provided on both sides of the pressing plate (122), the connecting portions (1221) being rotatably mounted on a side wall of the electromagnet blade (121) away from the paper pile, and the pressing plate driving member (123) driving the pressing plate (122) to flip over and abut against the soft blade (112).

3. A printing press according to claim 1, characterized in that: The soft blade (112) is arranged to be curved in an upward arc.

4. A printing press according to claim 3, characterized in that: A guide shell (17) is provided on a side of the knife shell (111) that is bent and extended away from the paper pile. The soft blade (112) is installed in the guide shell (17). The guide shell (17) is in the shape of a quarter arc. The tangent line of the lower side of the guide shell (17) and the movement direction of the knife head (1121) are in the same straight line, and the end of the soft blade (112) away from the knife head (1121) is always located in the guide shell (17).

5. A printing press according to claim 4, characterized in that: The soft blade drive member (113) includes a sliding seat (1131), a sliding motor (1132), a sliding gear (1133) and a rack (1134), wherein the rack (1134) is fixed to the guide shell (17) and extends along the length direction of the guide shell (17), the sliding seat (1131) is slidingly mounted on the guide shell (17) and slides along the extension direction of the guide shell (17), the sliding seat (1131) is fixed to one end of the soft blade (112) away from the cutter head (1121), the sliding motor (1132) is mounted on the sliding seat (1131), and the sliding gear (1133) is fixed to the output shaft of the sliding motor (1132) and meshes with the rack (1134).

6. A printing press according to claim 4, characterized in that: A pressure rod (172) is provided in the guide shell (17), and the pressure rod (172) abuts against the soft blade (112). The end of the pressure rod (172) is rotatably mounted on the inner wall of the guide shell (17), and the pressure rod (172) is folded along the width direction of the guide shell (17). After the pressure rod (172) is folded, the end portion remains in abutment with the soft blade (112).

7. A printing press according to claim 6, characterized in that: The end of the push rod (31) is provided with an adsorption disk (35) and is connected to an air pump. There are four re-taking components (3), two of which form a set. The two sets of re-taking components (3) move alternately, and one set of re-taking components (3) is located between the other set of re-taking components (3).

8. The printing press according to claim 1, characterized in that: It also includes a baffle (4), which is located between the paper pile and the paper feed roller (5), and the height of the baffle (4) is only enough for one sheet of paper to pass through.

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