Printing machine reeling device

Abstract

The present application discloses a printing press rewinding and unwinding device, which belongs to the technical field of printing presses. It mainly includes a double unwinder, which has a base suitable for carrying the double unwinder; a clamping assembly, which includes: two sets of tracks, a cylinder is arranged between the two sets of tracks, a bottom plate, and two sets of connecting rods are installed on the bottom plate; an arc-shaped slide rail, a slide seat, and a spring is arranged at one end of the slide seat and the arc-shaped slide rail; a clamping part, and a clamping box is installed on the clamping part; a contact switch, the contact switch and the clamping part are electrically connected, a rotating frame is rotatably installed on the contact switch, and a blocking ball is rotatably installed at one end of the rotating frame; a connecting plate, and a plug is installed on the connecting plate. A printing press rewinding and unwinding device of the present application, through the setting of the clamping assembly, can ensure a certain tension after the film on the unwinding roller is completely separated from the unwinding roller when changing the roll, so as to avoid the waste of raw materials caused by most of the remaining film, and achieve the effect of still having a certain tension when the printing material is separated from the unwinding device.

Description

Technical Field

[0001] The present application relates to the technical field of printing machines, and in particular to a winding and unwinding device of a printing machine. Background Art

[0002] A printing press is a machine for printing text and images. Modern printing presses are generally composed of mechanisms such as plate loading, inking, embossing, and paper feeding (including folding). There are many types of printing presses. According to the relative positions of the image and non-image areas on the printing plate, they can be divided into letterpress printing presses, gravure printing presses, lithographic printing presses, and screen printing presses (screen printing). The unwinding and rewinding devices of printing presses are crucial components of printing presses. They are responsible for accurately feeding printing materials (such as paper, film, etc.) into the printing area and rewinding the printed materials.

[0003] For example, the patent with the authorization announcement number CN202414826U discloses a non-stop printing receiving and unwinding device. When the device changes the roll, that is, when the printing material of one station is finished, the paper splicing button is activated, and the cutter on the paper splicer automatically cuts the printing material on the turret double-station unwinding device, and at the same time, the printing material on the other station is automatically bonded through the docking mechanism on one side of the turret double-station unwinding device, so as to achieve the docking of the new and old printing materials;

[0004] Although the above-mentioned equipment can realize docking of printed materials without stopping the machine when printing, the printed materials are cut by a cutter, and when the cutter cuts the printed materials, the printed materials must maintain a certain tension to complete the cutting. As a result, after the printed materials are cut, a part of the printed materials will still be wound on the unwinding device, so that a large part of the printed materials remain, which leads to waste of printed materials.

[0005] Therefore, it is necessary to provide a printing press reeling and unreeling device to solve the above problems.

[0006] It should be noted that the above information disclosed in this background technology section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute the prior art. Summary of the invention

[0007] Based on the above problems existing in the prior art, the problem to be solved by the present application is: to provide a winding and unwinding device for a printing machine, so as to achieve the effect that the printing material still has a certain tension when it is separated from the unwinding device.

[0008] The technical solution adopted by the present application to solve the technical problem is: a printing press winding and unwinding device, including a double unwinding machine, the double unwinding machine has a base suitable for carrying the double unwinding machine; a clamping assembly, the clamping assembly is installed on the base, and the clamping assembly includes: two sets of tracks, the tracks are installed at one end of the base, a cylinder is arranged between the two sets of tracks, the cylinder is installed on the base, a bottom plate, the bottom plate is connected to the output end of the cylinder, the bottom plate is slidably arranged on the two sets of tracks, and two sets of connecting rods are installed on the bottom plate; an arc slide rail, the arc slide rail is installed at one end of the two sets of connecting rods away from the base end; a slide seat, the slide seat is slidably arranged on the arc-shaped slide rail, and a spring is arranged on one end of the slide seat and the arc-shaped slide rail; a clamping part, the clamping part is installed on the slide seat, a clamping box is installed on the clamping part, and an opening is opened on the clamping box; a contact switch, the contact switch is installed inside the clamping box, the contact switch is located on one side of the clamping part, the contact switch and the clamping part are electrically connected, a rotating frame is rotatably installed on the contact switch, and a blocking ball is rotatably installed on one end of the rotating frame; a connecting plate, the connecting plate is installed on the other end of the arc-shaped slide rail, a plug is installed on the connecting plate, and a push block is installed on the plug.

[0009] Furthermore, two groups of support plates are installed on the base, and discs are rotatably installed on both groups of support plates. A stepper motor is installed on one group of support plates, and the output end of the stepper motor is connected to one group of discs. A power supply box is installed on the other group of support plates.

[0010] Furthermore, a first unwinding roller and a second unwinding roller are mounted on a common bearing on the two groups of discs, and the first unwinding roller and the second unwinding roller are arranged horizontally opposite to each other on the discs.

[0011] Furthermore, a first roller is installed on the two groups of discs, and the first roller is located above the first unwinding roller and the second unwinding roller. A second roller is installed on the two groups of discs, and the second roller is located below the first unwinding roller and the second unwinding roller.

[0012] Furthermore, two groups of servo motors are installed on one group of discs, and the output ends of the two groups of servo motors are respectively connected to one end of the first unwinding roller and one end of the second unwinding roller.

[0013] Furthermore, an ultrasonic welding machine is arranged on one side of the double unwinding machine, and the ultrasonic welding machine has at least two groups of first transition rollers, and a welding portion is arranged between the at least two groups of first transition rollers.

[0014] Furthermore, a corona machine is arranged on one side of the ultrasonic welding machine. The corona machine has at least two groups of second transition rollers, and two groups of corona parts are arranged between the at least two groups of second transition rollers.

[0015] Furthermore, a material storage tractor is provided on one side of the corona machine, and the material storage tractor has at least two groups of material storage rollers, which are arranged opposite to each other up and down, and two groups of pressure rollers are provided between at least two groups of material storage rollers. A control roller is provided on the end of the material storage tractor away from the corona machine, and a driving device is connected to one side of the control roller.

[0016] Furthermore, a guide deviation correcting machine is arranged on one side of the storage tractor, and the guide deviation correcting machine has at least two groups of guide rollers, and the at least two groups of guide rollers are arranged opposite to each other up and down.

[0017] Furthermore, a double winder is provided on one side of the guide deviation correcting machine.

[0018] The beneficial effect of the present application is that a printing press winding and unwinding device provided by the present application can ensure a certain tension even after the film on the unwinding roller is completely separated from the unwinding roller when changing the roll, thereby avoiding the waste of raw materials caused by most of the remaining film, and achieving the effect of still having a certain tension when the film is separated from the unwinding equipment.

[0019] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0021] Figure 1 It is an overall schematic diagram of a winding and unwinding device of a printing machine in this application;

[0022] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0023] Figure 3 for Figure 1 The enlarged schematic diagram of point B in the middle;

[0024] Figure 4 for Figure 1 The overall schematic diagram of the middle double unwinding machine;

[0025] Figure 5 for Figure 4 The overall schematic diagram from another perspective;

[0026] Figure 6 for Figure 5 The enlarged schematic diagram of the center C;

[0027] Figure 7 for Figure 6Another perspective diagram of the whole part

[0028] Figure 8 for Figure 6 The enlarged schematic diagram of point D in the middle;

[0029] Fig. 9 for Figure 6 A partial exploded schematic diagram of the clamping assembly;

[0030] Fig.10 for Figure 4 Another perspective diagram of the whole of the middle part;

[0031] Fig.11 for Fig.10 The enlarged schematic diagram of point E in the middle;

[0032] Fig.12 for Fig.10 The enlarged schematic diagram of F in the middle;

[0033] Fig.13 for Figure 1 Schematic diagram of some processes of printing reeling and unreeling;

[0034] Fig.14 for Fig.13 Schematic diagram of the remaining process of printing reeling and unwinding;

[0035] Among them, the reference numerals in the figure are:

[0036] 1. Double unwinding machine; 101. Base; 102. Power supply box; 103. Disc; 104. First roller; 105. First unwinding roller; 106. Servo motor; 107. Stepper motor; 108. Support plate; 109. Second unwinding roller; 110. Second roller;

[0037] 2. Ultrasonic welding machine; 21. Welding part; 22. First transition roller;

[0038] 3. Corona machine; 31. Corona unit; 32. Second transition roller;

[0039] 4. Storage tractor; 41. Pressing roller; 42. Storage roller; 43. Control roller;

[0040] 5. Guide deviation correcting machine; 51. Guide roller; 52. Pressing roller assembly;

[0041] 6. Clamping assembly; 61. Bottom plate; 62. Track; 63. Connecting rod; 64. Arc slide rail; 65. Clamping box; 66. Sliding seat; 67. Spring; 68. Connecting plate; 69. Insert; 610. Clamping part; 611. Contact switch; 612. Rotating frame; 613. Stop ball; 614. Cylinder;

[0042] 7. Docking assembly; 71. Guide rod; 72. Connecting rod; 73. Rocker; 74. Fixed plate; 75. Squeeze roller; 76. Support block; 77. Card block; 8. Screen printing machine; 9. Material storage buffer box; 10. Visual inspection table; 11. IR drying area; 12. AC cooling area; 13. Double winder. DETAILED DESCRIPTION

[0043] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0044] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution 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 only 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 should fall within the scope of protection of the present application.

[0045] Embodiment 1: The device disclosed in this application is mainly used for the unwinding and rewinding of photovoltaic film printing. This embodiment mainly describes the basic structure and working principle of the unwinding and rewinding device of the printing machine, specifically:

[0046] like Figure 1 As shown, the present application provides a printing press winding and unwinding device, including a double unwinding machine 1, the double unwinding machine 1 is used to realize non-stop unwinding of a film, the double unwinding machine 1 includes a base 101, the base 101 is the bearing part of the double unwinding machine 1, which is welded by multiple groups of steel plates, and the base 101 is usually placed on a flat ground to carry the double unwinding machine 1;

[0047] like Figure 1 and Figure 4 As shown, two groups of support plates 108 for supporting the double unwinding machine 1 are fixedly installed on the base 101, and discs 103 are rotatably installed on both groups of support plates 108, and a stepper motor 107 is fixedly installed on one group of support plates 108, and the output end of the stepper motor 107 is connected to one group of discs 103, so that the group of discs 103 can rotate under the drive of the stepper motor 107, and a power supply box 102 for providing electric energy for the roll changing operation is fixedly installed on the other group of support plates 108;

[0048] At the same time, a first unwinding roller 105 and a second unwinding roller 109 are mounted on the bearings of the two sets of discs 103. The first unwinding roller 105 and the second unwinding roller 109 are used to place the film roll to be printed, and the two sets of discs 103 are connected into a whole through the first unwinding roller 105 and the second unwinding roller 109. In the initial state, the first unwinding roller 105 is located in the working position, so that the film roll on the first unwinding roller 105 can be connected to the subsequent printing equipment;

[0049] It should be noted that, in the initial state, the first unwinding roller 105 is located near the printing device (i.e., the working position), and the second unwinding roller 109 is located far away from the printing device (the standby position), so that the stepping motor 107 drives the disc 103 to rotate 180°, that is, the position switching of the first unwinding roller 105 and the second unwinding roller 109 can be completed, and the roll replacement operation of the two sets of film rolls can be realized. Figure 4 In the direction from left to right, the disc 103 rotates clockwise when changing the roll to complete the switching of the two sets of unwinding rollers;

[0050] Continue to refer Figure 4 , two groups of servo motors 106 are fixedly mounted on one group of discs 103, and the output ends of the two groups of servo motors 106 are respectively connected to one end of the first unwinding roller 105 and the second unwinding roller 109, so as to drive the first unwinding roller 105 and the second unwinding roller 109 to rotate to adapt to the unwinding operation of the film;

[0051] At the same time, a first roller 104 is installed between the two groups of discs 103, and the first roller 104 is located above the first unwinding roller 105 and the second unwinding roller 109. At the same time, a second roller 110 is installed between the two groups of discs 103, and the second roller 110 is located below the first unwinding roller 105 and the second unwinding roller 109, so that during the roll changing operation, when the positions of the first unwinding roller 105 and the second unwinding roller 109 are switched, the positions of the first roller 104 and the second roller 110 are synchronously driven to switch;

[0052] And when the first unwinding roller 105 is about to complete unwinding, it needs to switch positions with the second unwinding roller 109. At this time, the first unwinding roller 105 rotates clockwise downward, thereby driving the first roller 104 to rotate clockwise and slowly press on the film being unwound by the first unwinding roller 105. At this time, the film on the first unwinding roller 105 passes through the bottom of the first roller 104 and enters the printing device;

[0053] And when the roll change is completed, the position of the first roller 104 is lower than the position of the first unwinding roller 105, so that the film forms a V-shaped transmission at the first roller 104;

[0054] At this time, the second unwinding roller 109 is located at the working position, and in the initial state, the end of the film on the second unwinding roller 109 will be partially overhanging, and glue is coated on the overhanging film, so that when the second unwinding roller 109 rotates to the working position, the overhanging film on the second unwinding roller 109 will be bonded to the film being unwound on the first unwinding roller 105, so as to realize the roll changing operation;

[0055] like Fig.14 As shown, a double winder 13 is provided on one side of the double unwinder 1, and the double winder 13 is used for non-stop winding operation of the film to ensure non-stop printing operation of the film. The double winder 13 is a prior art, such as the patent application publication number CN112357639A, and the specific structure and principle are not described in detail here;

[0056] like Figure 1 As shown, in order to reinforce the film that has been rewound and bonded, an ultrasonic welding machine 2 is provided on one side of the double unwinding machine 1, and the ultrasonic welding machine 2 is located between the double unwinding machine 1 and the double winding machine 13;

[0057] like Figure 1-Figure 2 As shown, the ultrasonic welding machine 2 has a plurality of first transition rollers 22, and a welding portion 21 is provided between the plurality of first transition rollers 22, so that when the connected film roll needs to be reinforced, the bonded film roll passes through the plurality of first transition rollers 22 in sequence and reaches the position of the welding portion 21, and at this time, the film bonded by the welding portion 21 can be welded;

[0058] In order to enhance the adhesion of the film and to enhance the printing effect in subsequent printing operations, such as Figure 1 As shown, a corona machine 3 is provided on one side of the ultrasonic welding machine 2, and the corona machine 3 is located between the ultrasonic welding machine 2 and the double winder 13;

[0059] The corona machine 3 has multiple sets of second transition rollers 32, and two sets of corona parts 31 are arranged between the multiple sets of second transition rollers 32;

[0060] The two groups of corona parts 31 are respectively located above and below the second transition roller 32, so as to perform corona treatment on the upper and lower surfaces of the film passing through the second transition roller 32, so as to form microscopic roughness and polarity on the surface of the film, thereby enhancing the adhesion between the film and other materials (such as ink, adhesive, etc.);

[0061] In order to control the transport speed of the film, such as Figure 1As shown, an auxiliary film transport assembly is provided on one side of the corona machine 3, and the auxiliary film transport assembly is located between the corona machine 3 and the double winder 13. The auxiliary film transport assembly includes a storage tractor 4, and the storage tractor 4 is used to form a plurality of groups of wavy films. At the same time, a guide deviation correcting machine 5 is provided on one side of the storage tractor 4, and the guide deviation correcting machine 5 is used to ensure the stability of the direction and position of the film during the transmission process;

[0062] Continue to refer Figure 1 The storage tractor 4 has a plurality of storage rollers 42, and the plurality of storage rollers 42 are arranged opposite to each other up and down, so that the film passing through the corona machine 3 passes through the plurality of storage rollers 42 to form a wavy film, so that the storage tractor 4 can temporarily store more films, thereby providing necessary buffer time for the subsequent production line, so that the subsequent process can be carried out more smoothly;

[0063] At the same time, two groups of pressing rollers 41 are arranged between the multiple groups of storage rollers 42 to flatten the film passing through the storage rollers 42 to prevent it from wrinkling during transportation. It should be noted that the pressing roller 41 is a prior art, such as the patent with the authorization announcement number CN208939071U, and the specific structure and principle are not described in detail here;

[0064] like Figure 1 and Figure 3 As shown, a control roller 43 is provided at one end of the storage tractor 4 away from the corona machine 3, and a driving device (not shown in the figure) is connected to one side of the control roller 43. The driving device can drive the control roller 43 to move up and down to adjust the tension of the film passing through the control roller 43. Specifically, the driving device includes a motor provided on the storage tractor 4, and a belt assembly is provided at the output end of the motor. At the same time, the control roller 43 is installed on the belt assembly, so that the control roller 43 can be driven by the motor and driven by the belt assembly to move up and down.

[0065] Continue to refer Figure 1 The guide deviation correcting machine 5 has a plurality of guide rollers 51 for guiding the film, and the plurality of guide rollers 51 are arranged relative to each other up and down, so as to provide a clear transmission path for the film, ensuring that the film can be stably transmitted in a predetermined direction. At the same time, the film passes through the plurality of guide rollers 51 in sequence, and a wavy film can be formed again, thereby further increasing the temporary storage capacity of the film to control the transmission speed of the film.

[0066] It should be noted that a pressure roller assembly 52 having the same structure as the pressure roller unit 41 is provided on the guide deviation correcting machine 5 to further flatten the film, eliminate wrinkles and unevenness that may occur in the film during the transmission process, and improve the flatness and surface quality of the film;

[0067] like Fig.13 and Fig.14 As shown, a film processing assembly is arranged between the double winder 13 and the auxiliary film transport assembly, and the film processing assembly includes a screen printer 8, so as to print the film passing through the screen printer 8, and a material storage buffer box 9 is arranged on one side of the screen printer 8, so as to buffer the film passing through to adapt to the processing time of the subsequent equipment, and a visual inspection table 10 is arranged on one side of the material storage buffer box 9, so as to facilitate the visual inspection of the staff, and an IR drying area 11 is arranged on one side of the visual inspection table 10, so as to dry the film after printing and inspection, and an AC cooling area 12 is arranged on one side of the IR drying area 11, so as to cool the dried film;

[0068] In order to ensure that the double winder 13 has enough time for winding, an auxiliary film transport component with the same structure is provided on the double winder 13 and the film processing component to control the transmission speed of the printed film to adapt to the time control during winding.

[0069] Embodiment 2: The above embodiment realizes the film rewinding operation without stopping the machine through the double unwinding machine 1. However, during the rewinding operation, the film on the first unwinding roller 105 needs to maintain a certain tension with the first roller 104 to complete the bonding with the film on the second unwinding roller. That is, when the film on the first unwinding roller 105 is bonded with the film on the second unwinding roller 109, a large amount of film is still left on the first unwinding roller 105, resulting in a waste of raw materials.

[0070] To solve this problem, Figure 5 As shown, this embodiment is additionally provided with a clamping assembly 6 on the basis of the above embodiment, so as to clamp the film separated from the first unwinding roller 105 when changing the roll, so that the film continues to be in a certain tension state, thereby reducing the waste of the film;

[0071] like Figure 5-Figure 7 As shown, a clamping assembly 6 is arranged on the base 101, and the clamping assembly 6 includes two sets of rails 62 fixedly installed at one end of the base 101, and a cylinder 614 is arranged between the two sets of rails 62, and a bottom plate 61 is fixedly installed at the output end of the cylinder 614, and the bottom plate 61 is a bearing part of the clamping assembly 6. The bottom plate 61 is slidably arranged on the two sets of rails 62, so that the bottom plate 61 can move horizontally along the rails 62 under the drive of the cylinder 614;

[0072] Continue to refer Figure 6Two groups of connecting rods 63 are fixedly installed on the bottom plate 61. The connecting rods 63 are supporting parts of the clamping assembly 6, and an arc-shaped slide rail 64 is fixedly installed at one end of the two groups of connecting rods 63 away from the bottom plate 61. At the same time, a slide seat 66 is slidably arranged on the arc-shaped slide rail 64, so that the slide seat 66 can move on the arc-shaped slide rail 64. For the convenience of description, the upper end of the arc-shaped slide rail 64 is defined as the initial end, and the lower end of the arc-shaped slide rail 64 is defined as the terminal end. In the initial state, the slide seat 66 is located at the initial end, so that the slide seat 66 can move from the initial end to the terminal end under the action of external force;

[0073] At the same time, a spring 67 is provided between the initial end of the arc-shaped slide rail 64 and the slide seat 66, so that the slide seat 66 can stay at the initial end under the action of the spring 67, and after the slide seat 66 moves to the terminal end, it can be reset under the action of the spring 67;

[0074] like Figure 6 and Fig. 9 As shown, a clamping portion 610 is fixedly mounted on the slide 66 to clamp the side of the film. The clamping portion 610 is an existing pneumatic finger. The specific structure and principle are not described in detail here. For the convenience of description, the clamping position of the clamping portion 610 is defined as a clamping finger.

[0075] At the same time, a clamping box 65 is fixedly installed on the clamping part 610 outside the clamping finger, and an opening suitable for the film to pass through is opened on the clamping box 65, so that the film can reach the position of the clamping finger after passing through the opening, and a contact switch 611 is fixedly arranged inside the clamping box 65, and the contact switch 611 is electrically connected to the clamping part 610 to control the opening and closing of the clamping part 610, and the contact switch 611 is located on the side of the clamping finger close to the terminal end of the arc slide rail 64. In the initial state, the clamping part 610 is in an open state, so that the side edge of the film can enter the clamping finger of the clamping part 610, and at the same time, it is convenient for the side edge of the film to contact with the contact switch 611;

[0076] The contact switch 611 has a housing and a trigger portion located at the bottom of the housing, wherein the housing is fixedly mounted to the clamping box 65 to fix the contact switch 611, and the trigger portion is a button for turning on or off the contact switch 611. At the same time, a rotating frame 612 is rotatably mounted on the housing of the contact switch 611, and the proximal end position of the rotating frame 612 close to the housing corresponds to the trigger portion, so that the rotating frame 612 can be close to or away from the trigger portion;

[0077] It should be noted that the rotating frame 612 can rotate horizontally, and a torsion spring (not shown in the figure) is installed between the housing of the contact switch 611 and the rotating frame 612, so that in the initial state, the rotating frame 612 is parallel to the direction of film conveying. At this time, the proximal end of the rotating frame 612 is away from the trigger part, and the contact switch 611 is closed, thereby controlling the clamping part 610 to be in an open state. When the rotating frame 612 rotates horizontally inward under the pressure of the side of the film, the rotating frame 612 can contact the trigger part at this time, and the contact switch 611 is opened, thereby controlling the clamping part 610 to be in a clamping state and performing a clamping operation;

[0078] At the same time, a ball stopper 613 is rotatably mounted at the bottom of the rotating frame 612 away from the housing. The ball stopper 613 is suitable for contacting the side of the film in a tensioned state, and squeezes the ball stopper 613 under the action of the film tension, and drives the rotating frame 612 to rotate horizontally inward, thereby contacting the trigger part and turning on the contact switch, so that the clamping part 610 is in a clamping state;

[0079] In summary, when the film needs to be rewound, the two groups of unwinding rollers are first switched according to the first embodiment, and the description in the first embodiment is continued, that is, the second unwinding roller 109 in the preparation position is switched with the first unwinding roller 105 in the working position. However, in this embodiment, the second unwinding roller 109 and the first unwinding roller 105 are switched in two steps:

[0080] The first switching step is called the preliminary switching. In this state, the second unwinding roller 109 rotates less than 180°, so that the film coated with glue on the second unwinding roller 109 will not contact and adhere to the film being transported. In this state, the film on the first unwinding roller 105 is still unwinding.

[0081] The second switching step is called the final switching. In this state, the second unwinding roller 109 rotates 180°, that is, the second unwinding roller 109 is completely switched to the working position. At this time, the film coated with glue on the second unwinding roller 109 contacts and adheres to the film being transported, and the film on the second unwinding roller 109 begins to be unwound.

[0082] When the initial switching is completed, the cylinder 614 is started to drive the bottom plate 61 to move, thereby driving the arc-shaped slide rail 64 to move through the connecting rod 63, and then driving the clamping part 610 on the slide seat 66 to move, and then driving the clamping box 65 and the contact switch 611 to move, and the side edge of the film between the first unwinding roller 105 and the first roller 104 enters the clamping box 65 through the opening of the clamping box 65, and at this time the film enters the clamping area of ​​the clamping part 610;

[0083] At this time, since the film has not yet separated from the first unwinding roller 105, the film has a certain tension. As the clamping box 65 continues to move, the film continues to approach the blocking ball 613 and finally squeezes the blocking ball 613, thereby driving the rotating frame 612 to rotate and squeeze the triggering part of the contact switch 611, thereby driving the clamping part 610 to be in a clamping state, so as to clamp the side of the film entering the clamping area of ​​the clamping part 610;

[0084] When the film on the first unwinding roller 105 is separated from the first unwinding roller 105, the film still has a certain tension due to being clamped by the clamping part 610. At this time, the contact switch 611 will not be reset to ensure the stability of the clamping action.

[0085] And under the transmission of the film, the clamping part 610 slides from the initial end to the terminal end of the arc-shaped slide rail 64 through the slide seat 66, and always clamps the film during the sliding process, so that there is still a certain tension between the film and the first roller 104 at this time, and the spring 67 is stretched at this time;

[0086] like Figure 6 and Figure 8 As shown, a connecting plate 68 is provided at the terminal end of the arc-shaped slide rail 64, and an insert 69 is fixedly installed on the connecting plate 68, so that when the clamping portion 610 moves to the terminal end, the insert 69 enters the interior of the clamping box 65 through the opening of the clamping box 65, and a push block (not shown in the figure) is provided on the side of the insert 69. When the insert 69 enters the interior of the clamping box 65, it will contact the side of the blocking ball 613 and drive the blocking ball 613 to move toward the side of the film, thereby driving the rotating frame 612 to rotate horizontally. As the push block of the insert 69 continues to penetrate, the rotating frame 612 continues to rotate and finally separates from the contact switch 611, thereby controlling the clamping portion 610 to be in an open state, so as to control the clamping portion 610 to release the film. At this time, the slide seat 66 is reset under the action of the spring 67;

[0087] When the insert 69 enters the clamping box 65, the two sets of unwinding rollers are finally switched, and the film coated with glue on the second unwinding roller 109 is in contact with the film being transported, thereby maintaining the continuity of film transmission;

[0088] After the roll change is completed, the clamping portion 610 can be moved to the side of the disk 103 close to the stepping motor 107 to avoid interference with the unwinding operation.

[0089] like Figure 6 As shown, in order to ensure the stability of the bonding operation between the film clamped by the clamping portion 610 and the film on the second unwinding roller 109, a docking assembly 7 is provided on the bottom plate 61;

[0090] like Figure 10-11As shown, the docking assembly 7 includes two groups of support blocks 76 fixedly mounted on the bottom plate 61, and the support blocks 76 are the support parts of the docking assembly 7. At the same time, a seesaw 73 is rotatably mounted on the support blocks 76. The end of the seesaw 73 close to the support blocks 76 is a connecting part, and the end away from the support blocks 76 is an extrusion part, so that the extrusion part drives the connecting part to rotate under the action of external force. At the same time, a clamping block 77 is arranged between the connecting part and the support block 76 to prevent the connecting part from naturally sagging under the action of gravity.

[0091] At the same time, a fixing plate 74 is fixedly installed on the connection part, and a squeezing roller 75 is installed on the bearing of the fixing plate 74, and the squeezing roller 75 is located on the side of the second roller 110 close to the ultrasonic welding machine 2, so that when the roll is changed, the squeezing roller 75 is driven to rotate through the connection part through the fixing plate 74, so as to squeeze the film between the first roller 104 and the ultrasonic welding machine 2. At this time, the positions of the two groups of unwinding rollers and the two groups of rollers have been completely switched, so as to squeeze the film on the first unwinding roller 105, so that the bonding is more stable;

[0092] like Fig.10 and Fig.12 As shown, in order to trigger the rotation of the extrusion portion, a connecting rod 72 is fixedly installed on one side of the slide 66, and a guide rod 71 is fixedly installed on the end of the connecting rod 72 away from the slide 66. The guide rod 71 is parallel to the ground, so that when the slide 66 moves from the initial end to the terminal end, the guide rod 71 moves in an arc synchronously with the slide 66 on the arc rail 64, and gradually drives the guide rod 71 to be perpendicular to the ground during the movement. At the same time, the guide rod 71 and the extrusion portion of the rocker 73 are in the same plane, so that when the guide rod 71 gradually becomes perpendicular to the ground, the extrusion portion of the rocker 73 is squeezed, thereby driving the connection portion to rotate;

[0093] In summary, after the clamping portion 610 clamps the film, and as the slide 66 moves from the initial end to the terminal end of the arc-shaped slide rail 64, the guide rod 71 is synchronously driven to move, and during the movement of the guide rod 71, the guide rod 71 gradually becomes perpendicular to the ground, and when it gradually becomes perpendicular to the ground, it squeezes the squeezing portion of the rocker plate 73, driving the connecting portion to rotate, thereby driving the squeezing roller 75 to rotate through the fixed plate 74, and then squeezing the film between the first roller 104 and the ultrasonic welding machine 2 through the squeezing roller 75, so that it fits with the output end of the film roll on the second unwinding roller 109;

[0094] It can be understood that when the clamping portion 610 is located at the terminal end, the insert 69 contacts the rotating frame 612 through the push block, so that the clamping portion 610 releases the film, and when the guide rod 71 is located at the end of the squeezing portion of the rocker 73 close to the support block 76, the squeezing roller 75 completes squeezing the film, so that the film is bonded;

[0095] It should be noted that the other end of the base 101 is provided with a clamping assembly 6 and a docking assembly 7 of the same structure, so as to facilitate the clamping and docking operations on the two ends of the film.

[0096] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A printing press reeling and unreeling device, characterized in that: include: A double unwinding machine (1), the double unwinding machine (1) having a base (101) suitable for carrying the double unwinding machine (1); A clamping assembly (6), wherein the clamping assembly (6) is mounted on the base (101), and the clamping assembly (6) comprises: Two sets of rails (62), the rails (62) are mounted on one end of the base (101), a cylinder (614) is provided between the two sets of rails (62), and the cylinder (614) is mounted on the base (101), A bottom plate (61), the bottom plate (61) being connected to the output end of the cylinder (614), the bottom plate (61) being slidably disposed on the two groups of rails (62), and two groups of connecting rods (63) being installed on the bottom plate (61); An arc-shaped slide rail (64), the arc-shaped slide rail (64) being installed at one end of the two groups of connecting rods (63) away from the base (101); A slide seat (66), the slide seat (66) being slidably disposed on the arc-shaped slide rail (64), and a spring (67) being disposed at one end of the slide seat (66) and the arc-shaped slide rail (64); A clamping portion (610), wherein the clamping portion (610) is mounted on the slide seat (66), a clamping box (65) is mounted on the clamping portion (610), and an opening is formed on the clamping box (65); A contact switch (611), wherein the contact switch (611) is installed inside the clamping box (65), the contact switch (611) is located on one side of the clamping portion (610), the contact switch (611) and the clamping portion (610) are electrically connected, a rotating frame (612) is rotatably installed on the contact switch (611), and a blocking ball (613) is rotatably installed on one end of the rotating frame (612); A connecting plate (68), the connecting plate (68) being mounted on the other end of the arc-shaped slide rail (64), the connecting plate (68) being mounted with an insert (69), and the insert (69) being mounted with a push block; Two groups of support plates (108) are installed on the base (101), and a disk (103) is rotatably installed on both groups of support plates (108); A first unwinding roller (105) and a second unwinding roller (109) are mounted on a common bearing on the two groups of disks (103); A first roller (104) is commonly mounted on the two groups of discs (103); The air cylinder (614) is started to drive the bottom plate (61) to move, thereby driving the arc-shaped slide rail (64) to move through the connecting rod (63), and then driving the clamping portion (610) on the slide seat (66) to move, and then driving the clamping box (65) and the contact switch (611) to move, and the side edge of the film between the first unwinding roller (105) and the first roller (104) enters the clamping box (65) through the opening of the clamping box (65), and the film enters the clamping area of ​​the clamping portion (610); At this time, since the film has not yet separated from the first unwinding roller (105), the film has a certain tension. As the clamping box (65) continues to move, the film continues to approach the blocking ball (613) and finally squeezes the blocking ball (613), thereby driving the rotating frame (612) to rotate and squeezing the trigger part of the trigger switch (611), thereby driving the clamping part (610) to be in a clamping state, so as to clamp the side of the film entering the clamping area of ​​the clamping part (610).

2. A printing press reel-up and reel-out device according to claim 1, characterized in that: A stepper motor (107) is installed on one group of the support plates (108), the output end of the stepper motor (107) is connected to one group of the discs (103), and a power supply box (102) is installed on another group of the support plates (108).

3. A printing press reel-up and reel-out device according to claim 2, characterized in that: The first unwinding roller (105) and the second unwinding roller (109) are arranged horizontally opposite to each other on the disc (103).

4. A printing press reel-up and reel-out device according to claim 3, characterized in that: The first roller (104) is located above the first unwinding roller (105) and the second unwinding roller (109); a second roller (110) is commonly mounted on the two groups of discs (103); and the second roller (110) is located below the first unwinding roller (105) and the second unwinding roller (109).

5. The printing press reel-up and reel-out device according to claim 3, characterized in that: Two groups of servo motors (106) are installed on one group of the discs (103), and the output ends of the two groups of servo motors (106) are respectively connected to one end of the first unwinding roller (105) and the second unwinding roller (109).

6. The printing press reel-up and reel-out device according to claim 1, characterized in that: An ultrasonic welding machine (2) is arranged on one side of the double unwinding machine (1), and the ultrasonic welding machine (2) has at least two groups of first transition rollers (22), and a welding portion (21) is arranged between the at least two groups of first transition rollers (22).

7. A printing press reel-up and reel-out device according to claim 6, characterized in that: A corona machine (3) is arranged on one side of the ultrasonic welding machine (2); the corona machine (3) has at least two groups of second transition rollers (32); and two groups of corona parts (31) are arranged between the at least two groups of second transition rollers (32).

8. The printing press reel-up and reel-out device according to claim 7, characterized in that: A material storage tractor (4) is arranged on one side of the corona machine (3), and the material storage tractor (4) has at least two groups of material storage rollers (42), the at least two groups of material storage rollers (42) are arranged in an upper and lower relative manner, and two groups of pressure rollers (41) are arranged between the at least two groups of material storage rollers (42). A control roller (43) is arranged at one end of the material storage tractor (4) away from the corona machine (3), and a driving device is connected to one side of the control roller (43).

9. The printing press reel-up and reel-out device according to claim 8, characterized in that: A guide deviation correcting machine (5) is arranged on one side of the storage tractor (4). The guide deviation correcting machine (5) has at least two groups of guide rollers (51). The at least two groups of guide rollers (51) are arranged opposite to each other in an upper and lower direction.

10. The printing press reel-up and reel-out device according to claim 9, characterized in that: A double winder (13) is provided on one side of the guide deviation correcting machine (5).

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