Automatic winding and pressurizing mechanism of printing machine

Abstract

The utility model relates to the technical field of printing devices, in particular to an automatic winding and pressurizing mechanism of a printing machine. The driving roller drives the air expansion shaft and the paper roll arranged outside the air expansion shaft in a sleeving mode to rotate and wind through friction force; the pressurizing mechanism is used for pressing the air expansion shaft to keep constant contact pressure between the paper roll and the driving roller; according to the technical scheme, when the pressurizing mechanism moves towards the driving roller, under the pressure of the air expansion shaft, the push rod falls down to enable the air expansion shaft to pass through, and the pressurizing rod tightly presses the air expansion shaft; when the paper roll diameter is large enough, the pressurizing mechanism moves a push rod in the direction away from the driving roller under the action of the pressurizing driving assembly, and the push rod is limited by a push rod limiting pin and cannot fall to the left side to push an air expansion shaft to move rightwards.

Description

Technical Field

[0001] The present application relates to the technical field of printing devices, and in particular to an automatic winding and pressurizing mechanism of a printing press. Background Art

[0002] At present, the pressurizing devices for automatic rewinding of flexographic printing machines that are widely used on the market are mostly swing-arm type. During the pressurizing process, the pressure intensity will change with the swing of the pressurizing arm, resulting in different tightness of the rewinding. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the present application provides an automatic winding and pressurizing mechanism for a printing press.

[0004] To achieve the above objectives, the present application is implemented through the following technical solutions: The automatic winding and pressurizing mechanism of the printing press comprises:

[0005] Air shaft, used for rotating and rewinding;

[0006] A driving roller drives the air shaft and the paper roll sleeved outside the air shaft to rotate and reel up through friction;

[0007] A pressure mechanism, used for pressing the air shaft to keep a constant contact pressure between the paper roll and the driving roller;

[0008] The pressurizing mechanism comprises:

[0009] Sliding plates are slidably arranged on the frames at both ends of the inflatable shaft;

[0010] A push rod, rotatably connected to one end of the sliding plate close to the driving roller;

[0011] The pressure rod is rotatably connected to one end of the sliding plate away from the driving roller;

[0012] The pressurized driving assembly is connected to the sliding plate and is used to drive the sliding plate to approach or move away from the driving roller.

[0013] Preferably, the pressurizing mechanism further comprises:

[0014] A spring is arranged on a side of the push rod away from the driving roller and connected to the sliding plate, and when the push rod rotates toward the side away from the driving roller, the spring is compressed;

[0015] The torsion spring is arranged on the sliding plate through a torsion spring fixing shaft and is arranged at the lower end of the pressure rod.

[0016] Preferably, the pressurizing mechanism further comprises:

[0017] A limit pin is arranged on a side of the push rod close to the driving roller;

[0018] The limit lever is arranged at one end of the frame away from the driving roller. When the pressure mechanism moves to the limit lever, the pressure lever rotates toward the driving roller under the action of the limit lever.

[0019] Preferably, the pressurized drive assembly comprises:

[0020] A pressurizing drive mechanism, providing power for the movement of the pressurizing mechanism;

[0021] A driving sprocket connected to the driving end of the pressurizing driving mechanism;

[0022] A transmission sprocket, connected to the driving sprocket through a chain;

[0023] The sliding plate is connected with a chain, and the sliding plate is slidably connected with the frame through a sliding block and a sliding rail.

[0024] Preferably, the pressurizing driving mechanism is a driving motor, and the driving motor drives the driving sprocket to rotate.

[0025] Preferably, the pressurizing drive mechanism is a drive cylinder;

[0026] The driving sprocket includes a first sliding sprocket and a second sliding sprocket arranged outside the frame, and the first sliding sprocket and the second sliding sprocket are slidably connected to the frame through a sprocket sliding seat;

[0027] The driving end of the driving cylinder is connected to the sprocket slide seat;

[0028] The transmission sprockets include a first outer transmission sprocket, a second outer transmission sprocket, a first inner transmission sprocket and a second inner transmission sprocket;

[0029] The chain includes an outer chain and an inner chain;

[0030] One end of the outer chain is connected to the first chain tensioner, and the other end is connected to the second chain tensioner after passing through the first sliding sprocket, the first outer transmission sprocket, the second outer transmission sprocket and the second sliding sprocket;

[0031] The first inner transmission sprocket and the second inner transmission sprocket are connected to the first outer transmission sprocket and the second outer transmission sprocket respectively through a transmission shaft;

[0032] The inner chain drive is connected between the first inner drive sprocket and the second inner drive sprocket;

[0033] The sliding plate is connected with the inner chain.

[0034] Compared with the known public technologies, the technical solution provided by this application has the following beneficial effects:

[0035] (1) When the pressure mechanism in the technical solution of the present application moves toward the driving roller, under the pressure of the inflatable shaft, the push rod falls down to allow the inflatable shaft to pass, and the pressure rod presses the inflatable shaft. When the diameter of the paper roll is large enough, the pressure mechanism moves away from the driving roller under the action of the pressure drive assembly. The limit pin of the push rod is limited and cannot fall to the left, which will push the inflatable shaft to move to the right;

[0036] (2) The pressurizing mechanism of the present application is provided with springs and limit pins on both sides of the push rod, and a torsion spring is provided at the lower end of the pressurizing rod. When the diameter of the paper roll is large enough and the pressurizing mechanism moves to the rightmost end, the pressurizing rod is pressed to the left by the limit stop rod, so that the air shaft and the paper roll can step over the pressurizing rod, and the push rod pushes the paper roll out to complete the winding;

[0037] (3) The one-way rotation of the push rod and the pressure rod in the pressure mechanism realizes the compression and push-out of the air shaft, and realizes the automatic winding pressure and roll changing functions. The structure is compact and stable, and maintenance is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 This is a schematic diagram of the structure of the automatic winding and pressurizing mechanism of the printing machine in this application without a chain;

[0040] Figure 2 This is a schematic structural diagram of another perspective of the automatic winding and pressing mechanism of the printing machine in this application without a chain;

[0041] Figure 3 This is a schematic diagram of the structure of the inner side of the frame of the automatic winding and pressing mechanism of the printing machine in this application;

[0042] Figure 4 The pressurized driving device in this application is a schematic diagram of the structure of the sprocket chain on the outer side of the frame when driving the cylinder;

[0043] Figure 5 This is a schematic diagram of the structure of the push rod and the pressurizing rod in the pressurizing mechanism of the present application in a pressurized state;

[0044] Figure 6 This is a schematic diagram of the structure in which the push rod and the pressure rod in the pressure mechanism of the present application are in a fallen state.

[0045] In the above picture:

[0046] 100-inflatable shaft;

[0047] 200-driving roller;

[0048] 300-pressurizing mechanism; 301-sliding plate; 302-push rod; 303-pressurizing rod; 304-spring; 305-limiting pin; 306-torsion spring; 307-limiting lever;

[0049] 400-rack;

[0050] 501-driving sprocket; 5011-first sliding sprocket; 5012-second sliding sprocket; 5013-sprocket sliding seat;

[0051] 502-transmission sprocket; 5021-first outer transmission sprocket; 5022-second outer transmission sprocket; 5023-first inner transmission sprocket; 5024-second inner transmission sprocket;

[0052] 503-chain; 5031-outer chain; 5032-inner chain;

[0053] 504-driving cylinder;

[0054] 5051-first chain tensioner; 5052-second chain tensioner;

[0055] 600-Motor. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0057] In this application, Figure 1 This is a schematic diagram of the structure of the automatic winding and pressurizing mechanism of the printing machine in this application without a chain; Figure 2 This is a schematic structural diagram of another perspective of the automatic winding and pressing mechanism of the printing machine in this application without a chain; Figure 3 This is a schematic diagram of the structure of the inner side of the frame of the automatic winding and pressing mechanism of the printing machine in this application; Figure 4 The pressurized driving device in this application is a schematic diagram of the structure of the sprocket chain on the outer side of the frame when driving the cylinder; Figure 5 This is a schematic diagram of the structure of the push rod and the pressurizing rod in the pressurizing mechanism of the present application in a pressurized state; Figure 6 This is a schematic diagram of the structure in which the push rod and the pressure rod in the pressure mechanism of the present application are in a fallen state.

[0058] like Figure 1-2As shown, the automatic winding and pressurizing mechanism of the printing press comprises: an inflatable shaft 100, a driving roller 200, and a pressurizing mechanism 300, wherein the driving roller 200 drives the inflatable shaft 100 and the paper roll sleeved outside the inflatable shaft to rotate and wind up through friction force, and both ends of the driving roller 200 are connected to the frame and rotate under the drive of the motor 600, and both ends of the driving roller 200 are rotatably connected to the frame 400; the inflatable shaft 100 is used for rotating and winding, and is placed on the frame 400, and the pressurizing mechanism 300 presses both ends of the inflatable shaft 100, so that the paper roll sleeved outside the inflatable shaft and the driving roller maintain a constant contact pressure.

[0059] Specifically, Figure 1 , 5 -6, the pressurizing mechanism 300 includes: a sliding plate 301, a push rod 302, a pressurizing rod 303 and a pressurizing drive assembly; wherein: the sliding plate 301 is slidably arranged on the frame 400 at both ends of the inflatable shaft 100; the push rod 302 is rotatably connected to the end of the sliding plate 301 close to the driving roller 200; the pressurizing rod 303 is rotatably connected to the end of the sliding plate 301 away from the driving roller 200; the pressurizing drive assembly is connected to the sliding plate 301, and is used to drive the sliding plate 301 to approach or move away from the driving roller 200.

[0060] As a further solution of this embodiment, the pressure mechanism 300 also includes a spring 304 and a torsion spring 306. The spring 304 is arranged on the side of the push rod 302 away from the driving roller 200 and is connected to the sliding plate 301. When the push rod 302 rotates toward the side away from the driving roller 200, the spring 304 is compressed; the torsion spring 306 is arranged on the sliding plate 301 through the torsion spring fixed axis and is arranged at the lower end of the pressure rod 303.

[0061] The pressure mechanism 300 also includes a limit pin 305 and a limit lever 307. The limit pin 305 is arranged on the side of the push rod 302 close to the driving roller 200; the limit lever 307 is arranged at the end of the frame 400 away from the driving roller 200. When the pressure mechanism 300 moves to the limit lever 307, under the action of the limit lever 307, the pressure rod 303 rotates toward the driving roller 200.

[0062] Specifically, Figure 1-2 As shown, the pressurizing drive assembly includes: a pressurizing drive mechanism, a driving sprocket 501, and a transmission sprocket 502; wherein the pressurizing drive mechanism provides power for the movement of the pressurizing mechanism 300; the driving sprocket 501 is connected to the driving end of the pressurizing drive mechanism; the transmission sprocket 502 is transmission-connected to the driving sprocket 501 through a chain 503; the sliding plate 301 is connected to the chain 503, and the sliding plate 301 is slidingly connected to the frame 400 through a slider and a slide rail.

[0063] The pressurizing driving mechanism may be a driving motor, which drives the driving sprocket 501 to rotate, drives the chain 503 to move, and thus drives the pressurizing mechanism connected to the chain 503 to move.

[0064] The push rod 302 installed on the sliding plate 301 is installed through the rotating shaft and can swing around the rotating shaft. The spring 304 installed at the bottom of the push rod 302 can always make the push rod 302 stand up. The limit pin 305 set on the side of the push rod 302 close to the driving roller 200 makes the push rod 302 stand up only to the highest point. Figure 5 A torsion spring 306 is installed at the bottom of the pressure rod 303 to keep the pressure rod 303 upright, and the pressure rod 303 can maintain an upright state at most when it contacts the limiting position of the sliding plate 301.

[0065] like Figure 6 The push rod 302 and the pressure rod 303 are in the down position. When the entire pressure mechanism moves toward the driving roller 200, the push rod 302 contacts the inflatable shaft 100 and the push rod 302 is pressed down due to the heavy weight of the inflatable shaft 100. After passing the inflatable shaft 100, the spring 304 will stand up the push rod 302 again. At this time, the inflatable shaft 100 is between the push rod 302 and the pressure rod 303.

[0066] When the pressure mechanism moves to the extreme position away from one end of the driving roller 100 , the limit stopper 307 installed on the frame will push the pressure rod toward the driving roller 200 , so that the inflatable shaft 100 can pass over the pressure rod 303 .

[0067] When working, the pressure mechanism 300 moves toward the driving roller 200, the push rod 302 falls down to allow the inflatable shaft 100 to pass, and the pressure rod 303 presses the inflatable shaft 100. When the diameter of the paper roll is large enough, the pressure mechanism 300 moves away from the driving roller. The push rod 302 is limited by the limit pin 305 and cannot fall in the direction of the driving roller, which will push the inflatable shaft 100 to move away from the driving roller. When it moves to the extreme position away from the end of the driving roller 100, the pressure rod 303 is pressed to the left by the limit stop rod 307, so that the inflatable shaft 100 and the paper roll can go over the pressure rod 303, and the push rod 302 pushes the paper roll out to complete the winding.

[0068] In this example, Figure 1-4 As shown, the pressurized driving mechanism is a driving cylinder 504; the driving sprocket 501 includes a first sliding sprocket 5011 and a second sliding sprocket 5012 arranged on the outside of the frame 400, and the first sliding sprocket 5011 and the second sliding sprocket 5012 are slidingly connected to the frame 400 through a sprocket slide seat 5013; the driving end of the driving cylinder 504 is connected to the sprocket slide seat 5013.

[0069] The transmission sprocket 502 includes a first outer transmission sprocket 5021, a second outer transmission sprocket 5022, a first inner transmission sprocket 5023 and a second inner transmission sprocket 5024; the chain 503 includes an outer chain 5031 and an inner chain 5032; one end of the outer chain 5031 is connected to the first chain tensioner 5051, and the other end is connected to the second chain tensioner 5052 after passing through the first sliding sprocket 5011, the first outer transmission sprocket 5021, the second outer transmission sprocket 5022 and the second sliding sprocket 5012; the first inner transmission sprocket 5023 and the second inner transmission sprocket 5024 are respectively connected to the first outer transmission sprocket 5021 and the second outer transmission sprocket 5022 through a transmission shaft; the inner chain 5032 is transmission-connected between the first inner transmission sprocket 5023 and the second inner transmission sprocket 5024;

[0070] The sliding plate 301 is connected to the inner chain 5032 .

[0071] The driving principle of the pressurizing mechanism: the first outer transmission sprocket 5021 and the second outer transmission sprocket 5022 rotate synchronously in series with the first inner transmission sprocket 5023 and the second inner transmission sprocket 5024 through the transmission shaft, the first sliding sprocket 5011 and the second sliding sprocket 5012 are connected to the linear slide rail through the sprocket slide seat 5013 and connected to the driving end of the driving cylinder 504, and the extension and retraction of the piston rod of the driving cylinder 504 can drive the first sliding sprocket 5011 and the second sliding sprocket 5012 to move back and forth. The basic principle is as follows Figure 4 As shown: when the first sliding sprocket 5011 and the second sliding sprocket 5012 move back and forth, they will drive the outer chain 5031 to move, thereby driving the first outer transmission sprocket 5021 and the second outer transmission sprocket 5022 to rotate, and the first outer transmission sprocket 5021 and the second outer transmission sprocket 5022 rotate to drive the first inner transmission sprocket 5023 and the second inner transmission sprocket 5024 to rotate, and the first inner transmission sprocket 5023 and the second inner transmission sprocket 5024 rotate to move the inner chain 5032 in a loop, and the movement of the inner chain 5032 drives the pressure mechanism to move. Therefore, the pressure mechanism can press the air shaft to keep a constant pressure between the paper roll and the driving roller, and the pressure is determined by the air pressure. Since it is a movable pulley set, the outer chain 5031 and the inner chain 5032 can move two unit distances for each unit distance moved by the first sliding sprocket 5011 and the second sliding sprocket 5012.

[0072] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. The automatic rewinding and pressurizing mechanism of the printing press is characterized by: include: An air shaft (100) for rotating and winding; A driving roller (200) drives the air shaft (100) and the paper roll sleeved outside the air shaft to rotate and reel up through friction; A pressurizing mechanism (300) is used to press the inflatable shaft (100) to maintain a constant contact pressure between the paper roll and the driving roller (200); The pressurizing mechanism (300) comprises: Sliding plates (301) are slidably disposed on the frames (400) at both ends of the inflatable shaft (100); A push rod (302) rotatably connected to one end of the sliding plate (301) close to the driving roller (200); A pressure rod (303) rotatably connected to an end of the sliding plate (301) away from the driving roller (200); A pressurizing drive assembly is connected to the sliding plate (301) and is used to drive the sliding plate (301) to move closer to or farther from the driving roller (200).

2. The automatic winding and pressurizing mechanism of a printing press according to claim 1, characterized in that: The pressurizing mechanism (300) further comprises: a spring (304) disposed on a side of the push rod (302) away from the driving roller (200) and connected to the sliding plate (301), such that when the push rod (302) rotates toward a side away from the driving roller (200), the spring (304) is compressed; The torsion spring (306) is arranged on the sliding plate (301) via a torsion spring fixing shaft and is arranged at the lower end of the pressure rod (303).

3. The automatic winding and pressurizing mechanism of a printing press according to claim 2, characterized in that: The pressurizing mechanism (300) further comprises: A limit pin (305) is provided on a side of the push rod (302) close to the driving roller (200); The limiting lever (307) is arranged at one end of the frame (400) away from the driving roller (200). When the pressure mechanism (300) moves to the limiting lever (307), the pressure lever (303) rotates in the direction of the driving roller (200) under the action of the limiting lever (307).

4. The automatic winding and pressurizing mechanism of a printing press according to claim 1, characterized in that: The pressurized drive assembly comprises: A pressurizing drive mechanism, providing power for the pressurizing mechanism (300) to move; A driving sprocket (501) connected to a driving end of the pressurizing driving mechanism; A transmission sprocket (502) is transmission-connected to the driving sprocket (501) via a chain (503); The sliding plate (301) is connected to the chain (503), and the sliding plate (301) is slidably connected to the frame (400) via a sliding block and a sliding rail.

5. The automatic winding and pressurizing mechanism of a printing press according to claim 4, characterized in that: The pressurizing drive mechanism is a drive motor, and the drive motor drives the drive sprocket (501) to rotate.

6. The automatic winding and pressurizing mechanism of a printing press according to claim 4, characterized in that: The pressurizing drive mechanism is a drive cylinder (504); The driving sprocket (501) comprises a first sliding sprocket (5011) and a second sliding sprocket (5012) which are arranged outside the frame (400); the first sliding sprocket (5011) and the second sliding sprocket (5012) are slidably connected to the frame (400) via a sprocket sliding seat (5013); The driving end of the driving cylinder (504) is connected to the sprocket sliding seat (5013); The transmission sprocket (502) comprises a first outer transmission sprocket (5021), a second outer transmission sprocket (5022), a first inner transmission sprocket (5023) and a second inner transmission sprocket (5024); The chain (503) comprises an outer chain (5031) and an inner chain (5032); One end of the outer chain (5031) is connected to the first chain tensioner (5051), and the other end is connected to the second chain tensioner (5052) after passing through the first sliding sprocket (5011), the first outer transmission sprocket (5021), the second outer transmission sprocket (5022) and the second sliding sprocket (5012); The first inner transmission sprocket (5023) and the second inner transmission sprocket (5024) are respectively connected to the first outer transmission sprocket (5021) and the second outer transmission sprocket (5022) via a transmission shaft; The inner chain (5032) is drivingly connected between the first inner transmission sprocket (5023) and the second inner transmission sprocket (5024); The sliding plate (301) is connected to the inner chain (5032).

Images