Unreeling mechanism of printing machine

Abstract

The utility model relates to the technical field of digital printing machines, and discloses a printing machine unwinding mechanism which is arranged on a machine frame of a printing machine and comprises a mounting plate, an unwinding roller, a brake block, a movable seat and a driving mechanism, the unwinding roller comprises a connecting part and a bearing part used for mounting coiled materials, the connecting part is rotatably arranged on the mounting plate, and the brake block is arranged on the bearing part. The moving seat is arranged on one side of the connecting part, the brake block is connected into the moving seat in a sliding mode, and the driving mechanism is used for driving the brake block to abut against or be separated from the connecting part. According to the unreeling mechanism of the printing machine, when tensioning is needed, the driving mechanism drives the brake block to abut against the connecting part, the brake block rubs the connecting part to conduct braking, at the moment, the unreeling roller cannot rotate, tensioning of a transfer printing film in the transfer printing process is effectively guaranteed, and the product quality is guaranteed; when tensioning is not needed, the driving mechanism drives the brake block to be separated from the connecting part, and at the moment, the unwinding roller can rotate normally to achieve unwinding.

Description

Technical Field

[0001] The utility model relates to the technical field of digital printing machines, in particular to an unwinding mechanism of a printing machine. Background Art

[0002] In the transfer process of the digital printing machine, in order to ensure the transfer effect, the transfer film needs to be tightened before the transfer, and then the transfer is carried out. At the same time, the two ends of the workbench of the printing machine are respectively provided with an unwinding mechanism and a rewinding mechanism. During the transfer process, the transfer film is connected between the unwinding mechanism and the rewinding mechanism. In order to ensure the tightening effect of the transfer film during the transfer process, it is necessary to ensure that both the unwinding mechanism and the rewinding mechanism have a tightening effect. In the existing digital printing machines, the rewinding mechanism is connected to a driving mechanism, and has a tightening function under the action of the driving mechanism, but most of the existing unwinding mechanisms do not have a tightening function, which affects the transfer effect. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a printing press unwinding mechanism, which has a tensioning function, thereby effectively ensuring the tension of the transfer film during the transfer process and ensuring product quality.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A printing press unwinding mechanism is arranged on the frame of the printing press, and includes a mounting plate, an unwinding roller, a brake block, a movable seat and a driving mechanism. The unwinding roller includes a connecting portion and a supporting portion for mounting a coiled material. The connecting portion is rotatably arranged on the mounting plate, the movable seat is arranged on one side of the connecting portion, the brake block is slidably connected in the movable seat, and the driving mechanism is used to drive the brake block to abut or separate from the connecting portion.

[0006] Preferably, two bearing seats are arranged opposite to each other on the mounting plate, bearings are arranged in the bearing seats, and the connecting portion connects the two bearings.

[0007] Preferably, a fixing ring is provided at one end of the connecting portion away from the supporting portion, and the fixing ring abuts against the outer wall of the bearing seat.

[0008] Preferably, the movable seat comprises two seat plates arranged opposite to each other, the seat plates are provided with sliding grooves, and the two ends of the brake block are respectively slidably connected to the sliding grooves.

[0009] Preferably, a fixing plate is slidably connected between the two sliding grooves, one side of the fixing plate is connected to the driving mechanism, and the other side of the fixing plate is connected to the brake block.

[0010] Preferably, the driving mechanism comprises a support seat, on which a driving rod is movably provided, one end of the driving rod is connected to the brake block, and the other end penetrates a side of the support seat away from the unwinding roller for operation.

[0011] Preferably, a guide groove is provided in the support seat, a guide block is provided in the guide groove, one end of the guide block is connected to the driving rod, and the other end of the guide block is connected to the brake block.

[0012] Preferably, a connecting block is provided on the brake block, and a spring is provided between the connecting block and the guide block.

[0013] Preferably, the connecting block is provided with a first protrusion, the guiding block is provided with a second protrusion, and two ends of the spring are respectively sleeved on the first protrusion and the second protrusion.

[0014] Preferably, the driving rod is a screw rod, the screw rod is threadedly connected to the support seat, and a plum blossom handle is provided at one end of the screw rod for operation.

[0015] Compared with the prior art, a printing press unwinding mechanism according to an embodiment of the utility model has the following beneficial effects: a movable seat is arranged on one side of the connecting part, the interior of the movable seat is slidably connected to a brake block, and a driving mechanism is arranged to drive the brake block to abut against or separate from the connecting part; when tensioning is required, the driving mechanism drives the brake block to abut against the connecting part, and the brake block rubs the connecting part to brake, and at this time the unwinding roller cannot rotate, thereby effectively ensuring the tension of the transfer film during the transfer process and ensuring the product quality; when tensioning is not required, the driving mechanism drives the brake block to separate from the connecting part, and at this time the unwinding roller can rotate normally to achieve unwinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the unwinding mechanism of the printing press of the utility model.

[0017] Figure 2 For attachment Figure 1 A partial enlarged view of middle A.

[0018] Figure 3 It is a cross-sectional view of the unwinding mechanism of the printing press of the present utility model.

[0019] Among them: 1-mounting plate, 2-unwinding roller, 21-connecting part, 22-supporting part, 3-brake block, 4-moving seat, 41-seat plate, 42-slide groove, 5-bearing seat, 6-fixing ring, 7-fixing plate, 8-driving mechanism, 81-support seat, 82-driving rod, 83-guide block, 84-connecting block, 85-spring, 86-first protrusion, 87-second protrusion, 88-plum blossom handle. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] like Figure 1-3 As shown, a printing press unwinding mechanism according to a preferred embodiment of the utility model is arranged on the frame of the printing press, and includes a mounting plate 1, an unwinding roller 2, a brake block 3, a movable seat 4 and a driving mechanism 8. The mounting plate 1 is arranged on the frame of the printing press. The unwinding roller 2 includes a connecting portion 21 and a supporting portion 22 for mounting a coiled material. The connecting portion 21 is rotatably arranged on the mounting plate 1. The movable seat 4 is arranged on one side of the connecting portion 21. The brake block 3 is slidably connected in the movable seat 4. The driving mechanism 8 is used to drive the brake block 3 to abut or separate from the connecting portion 21. The unwinding roller 2 can directly adopt an unwinding air shaft, or the supporting portion 22 can adopt an unwinding air shaft to ensure the tension of the coiled material.

[0024] The unwinding mechanism of the printing press based on the above technical features is provided with a movable seat 4 on one side of the connecting part 21, the internal sliding connection of the movable seat 4 is connected to the brake block 3, and a driving mechanism 8 is provided to drive the brake block to abut against or separate from the connecting part 21; when tensioning is required, the driving mechanism 8 drives the brake block 3 to abut against the connecting part 21, and the brake block 3 rubs the connecting part 21 for braking, and at this time the unwinding roller 2 cannot rotate, thereby effectively ensuring the tension of the transfer film during the transfer process and ensuring the product quality; when tensioning is not required, the driving mechanism 8 drives the brake block 3 to separate from the connecting part 21, and at this time the unwinding roller 2 can rotate normally to achieve unwinding.

[0025] In this embodiment, two bearing seats 5 are arranged opposite to each other on the mounting plate 1, and bearings are arranged inside the bearing seats 5. The connecting portion 21 connects the two bearings, thereby ensuring the rotation of the connecting portion 21. At the same time, in order to prevent the connecting portion 21 from falling off the bearing seat 5, a fixing ring 6 is arranged at one end of the connecting portion 21 away from the supporting portion 22, and the fixing ring 6 abuts against the outer wall of the bearing seat 5 away from the supporting portion 22. The connecting portion 21 is coaxially arranged with the supporting portion 22, and the supporting portion 22 has a large diameter, so that the end of the supporting portion 22 connected to the connecting portion 21 abuts against the outer wall of the other bearing seat 5, so that under the action of the fixing ring 6 and the supporting portion 22, the connecting portion 21 is completely confined between the two bearing seats 5, thereby preventing the unwinding roller 2 from being separated from the bearing seat 5.

[0026] Specifically, the fixing ring 6 abuts against the steel sleeve, and the steel sleeve abuts against the inner ring of the bearing in the bearing seat, so that the unwinding roller 2 is limited in position during the rotation and cannot move forward and backward.

[0027] In this embodiment, the movable seat 4 includes two seat plates 41 arranged opposite to each other, and the seat plates 41 are provided with slide grooves 42, and the two ends of the brake block 3 are respectively slidably connected to the slide grooves 42. The method of forming the movable seat 4 by two seat plates 41 is not only convenient for manufacturing, but also convenient for installation. At the same time, for the brake blocks 3 of different sizes, the brake blocks 3 of different sizes can be set by simply adjusting the spacing between the two seat plates 41.

[0028] At the same time, in actual use, the width of the brake shoe 3 is generally smaller than the spacing between the two slide grooves 42, which facilitates the abutment between the brake shoe 3 and the connecting portion 21. Therefore, in order to ensure that the brake shoe 3 can slide normally along the slide groove 42, a fixed plate 7 is slidably connected between the two slide grooves 42, one side of the fixed plate 7 is connected to the driving mechanism 8, and the other side of the fixed plate 7 is connected to the brake shoe 3.

[0029] In this embodiment, the driving mechanism 8 includes a support seat 81, on which a driving rod 82 is movably provided, one end of the driving rod 82 is connected to the brake block 3 through the fixing plate 7, and the other end of the driving rod 82 penetrates the side of the support seat 81 away from the unwinding roller 2 for operation. Specifically, the driving rod 82 is a screw rod, which is threadedly connected to the support seat 81, and a plum blossom handle 88 is provided at one end of the screw rod for operation, and the brake block 3 can be driven by rotating the plum blossom handle 88 during operation.

[0030] At the same time, in order to ensure the accuracy of driving, a guide groove is provided in the support seat 81, and a guide block 83 is provided in the guide groove. One end of the guide block 83 is connected to the driving rod 82, and a connecting block 84 is provided on the brake block 3. Specifically, the fixed plate 7 is arranged between the brake block 3 and the connecting block 84, and the connecting block 84 is hinged to the fixed plate 7, and a spring 85 is provided between the connecting block 84 and the other end of the guide block 83.

[0031] During operation, by rotating the plum blossom handle 88, the screw pushes the spring 85 to move to adjust the elastic force of the spring 85, thereby controlling the clamping force of the brake block 84, and achieving the braking effect by changing the friction force of the brake block 84, so that the transfer film will not be loose during the unwinding and film pulling process and will always be in a taut state. In this way, the transfer film can be smoothly covered on the substrate without wrinkling during operation, thereby ensuring product quality.

[0032] In addition, to facilitate the installation of the spring 85 , a first protrusion 86 is provided on the connecting block 84 , and a second protrusion 87 is provided on the guide block 83 . Both ends of the spring 85 are respectively sleeved on the first protrusion 86 and the second protrusion 87 .

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A printing press unwinding mechanism, characterized in that: It includes a mounting plate, an unwinding roller, a brake block, a movable seat and a driving mechanism. The unwinding roller includes a connecting portion and a supporting portion for mounting the coiled material. The connecting portion is rotatably arranged on the mounting plate. The movable seat is arranged on one side of the connecting portion. The brake block is slidably connected in the movable seat. The driving mechanism is used to drive the brake block to abut or separate from the connecting portion.

2. The unwinding mechanism of a printing press according to claim 1, characterized in that: Two bearing seats are arranged opposite to each other on the mounting plate, bearings are arranged in the bearing seats, and the connecting part connects the two bearings.

3. The unwinding mechanism of a printing press according to claim 2, characterized in that: A fixing ring is provided at one end of the connecting portion away from the supporting portion, and the fixing ring abuts against the outer wall of the bearing seat.

4. The unwinding mechanism of a printing press according to claim 1, characterized in that: The movable seat comprises two seat plates arranged opposite to each other, the seat plates are provided with slide grooves, and the two ends of the brake block are respectively slidably connected to the slide grooves.

5. The unwinding mechanism of a printing press according to claim 4, characterized in that: A fixing plate is slidably connected between the two sliding grooves, one side of the fixing plate is connected to the driving mechanism, and the other side of the fixing plate is connected to the brake block.

6. The unwinding mechanism of a printing press according to any one of claims 1 to 5, characterized in that: The driving mechanism comprises a supporting seat, on which a driving rod is movably provided, one end of the driving rod is connected to the brake block, and the other end penetrates a side of the supporting seat away from the unwinding roller for operation.

7. The unwinding mechanism of a printing press according to claim 6, characterized in that: A guide groove is arranged in the support seat, a guide block is arranged in the guide groove, one end of the guide block is connected to the driving rod, and the other end of the guide block is connected to the brake block.

8. The unwinding mechanism of a printing press according to claim 7, characterized in that: A connecting block is arranged on the brake block, and a spring is arranged between the connecting block and the guide block.

9. The unwinding mechanism of a printing press according to claim 8, characterized in that: The connecting block is provided with a first protrusion, the guiding block is provided with a second protrusion, and two ends of the spring are respectively sleeved on the first protrusion and the second protrusion.

10. The unwinding mechanism of a printing press according to claim 6, characterized in that: The driving rod is a screw rod, which is threadedly connected to the support seat, and a plum blossom handle is provided at one end of the screw rod for operation.

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