Unreeling mechanism of digital printing machine

Abstract

The utility model relates to the technical field of printing machines, and discloses an unwinding mechanism of a digital printing machine, which is arranged on a frame of the printing machine and comprises a mounting plate, an unwinding roller, a rack, a lifting mechanism and a push-pull mechanism, the lifting mechanism and the push-pull mechanism are arranged on the mounting plate, and the unwinding roller comprises a connecting part and a bearing part for mounting coiled materials. The connecting part is rotatably arranged on the mounting plate, a gear is arranged on the connecting part, the lifting mechanism and the push-pull mechanism are both connected with the rack, the lifting mechanism is used for driving the rack to move up and down, and the push-pull mechanism is used for driving the rack to be meshed with or separated from the gear. According to the unwinding mechanism of the digital printing machine, the connecting part is rotatably arranged on the mounting plate, meanwhile, the gear is arranged on the connecting part, and the lifting mechanism and the push-pull mechanism are connected with the rack, so that the unwinding mechanism has a tensioning function, tensioning of a transfer printing film in the transfer printing process can be effectively guaranteed, and the product quality is guaranteed.

Description

Technical Field

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

[0002] In the transfer process of a digital printing machine, the transfer film needs to be tightened to ensure the transfer effect, so as to prevent the transfer film from wrinkling and causing poor transfer effect. The two ends of the transfer film are respectively connected to the unwinding mechanism and the rewinding mechanism. In order to ensure the tightening effect of the transfer film during the transfer process, the unwinding mechanism and the rewinding mechanism need to have a tightening effect. In the existing structure, the rewinding mechanism is connected to the driving mechanism and has a tightening function, 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 digital printing machine 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 digital printing press unwinding mechanism is arranged on a frame of the printing press, and includes a mounting plate, an unwinding roller, a rack, a lifting mechanism and a push-pull mechanism arranged on the mounting plate, the unwinding roller includes a connecting portion and a supporting portion for mounting a coil, the connecting portion is rotatably arranged on the mounting plate, a gear is provided on the connecting portion, the lifting mechanism and the push-pull mechanism are both connected to the rack, and the lifting mechanism is used to drive the rack to move up and down, and the push-pull mechanism is used to drive the rack to engage or separate with the gear.

[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, a driving plate is provided on the rack, a driving hole extending in a vertical direction is provided on the driving plate, the lifting mechanism is connected to the lower end of the driving plate, and the push-pull mechanism is connected to the driving hole.

[0009] Preferably, the lifting mechanism is a lifting cylinder, a cylinder barrel of the lifting cylinder is connected to the mounting plate, and a telescopic rod of the lifting cylinder is connected to the driving plate.

[0010] Preferably, a mounting hole is provided on the mounting plate, a first mounting seat is provided on the mounting hole, a cylinder barrel of the lifting cylinder is connected to the first mounting seat, and a telescopic rod of the lifting cylinder passes through the mounting hole to connect to the driving plate.

[0011] Preferably, the push-pull mechanism is a push-pull cylinder, the cylinder barrel of the push-pull cylinder is connected to the mounting plate, the telescopic rod of the push-pull cylinder is connected to a push-pull shaft, and the push-pull shaft is inserted into the driving hole.

[0012] Preferably, a seat plate is connected to the telescopic rod of the push-pull cylinder, connecting rods are respectively provided at both ends of the other side of the seat plate, and both ends of the push-pull shaft are respectively connected to the connecting rods.

[0013] Preferably, a second mounting seat is provided on one side of the mounting plate, and the cylinder barrel of the push-pull cylinder is fixed on the second mounting seat.

[0014] Compared with the prior art, the unwinding mechanism of a digital printing machine in the embodiment of the utility model has the following beneficial effects: by rotatably arranging the connecting part on the mounting plate, and arranging the gear on the connecting part, and connecting the lifting mechanism and the push-pull mechanism to the rack, the push-pull mechanism drives the rack to separate from the gear during unwinding, thereby ensuring the normal rotation and unwinding of the unwinding roller; when tensioning is required, the push-pull mechanism pushes the rack to engage with the gear, and the lifting cylinder drives the rack to drive the gear to rotate to tighten the transfer film, and when the transfer film is fully tightened, the push-pull mechanism and the lifting mechanism stop moving, and the unwinding roller cannot rotate at this time, thereby effectively ensuring the tension of the transfer film during the transfer process and ensuring the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the unwinding mechanism of the digital printing machine of the utility model.

[0016] Figure 2 For attachment Figure 1 A partial enlarged view of middle A.

[0017] Among them: 1-mounting plate, 2-unwinding roller, 21-connecting part, 22-supporting part, 3-rack, 4-gear, 5-bearing seat, 6-fixing ring, 7-driving plate, 71-driving hole, 8-first mounting seat, 9-push-pull shaft, a-second mounting seat, b-lifting cylinder, c-push-pull cylinder. DETAILED DESCRIPTION

[0018] 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.

[0019] 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.

[0020] 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.

[0021] like Figure 1-2 As shown, a digital 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 rack 3, a lifting mechanism and a push-pull mechanism arranged on the mounting plate 1, and 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, and a gear 4 is arranged on the connecting portion 21, the lifting mechanism and the push-pull mechanism are both connected to the rack 3, and the lifting mechanism is used to drive the rack 3 to move up and down, and the push-pull mechanism is used to drive the rack 3 to engage or disengage with the gear 4. The unwinding roller 2 can directly adopt an unwinding air shaft, or the supporting portion can adopt an unwinding air shaft to ensure the tension of the coiled material.

[0022] The unwinding mechanism of the digital printing machine based on the above technical features is achieved by rotatably setting the connection part 21 of the unwinding roller 2 on the mounting plate 1, and setting the gear 4 on the connection part 21, and connecting the lifting mechanism and the push-pull mechanism to the rack 3. When unwinding, the push-pull mechanism drives the rack 3 to separate from the gear 4 to ensure the normal rotation and unwinding of the unwinding roller 2; when tightening is required, the push-pull mechanism pushes the rack 3 to engage with the gear 4, and the lifting cylinder drives the rack 3 to drive the gear 4 to rotate to tighten the transfer film. When the transfer film is fully tightened, the push-pull mechanism and the lifting mechanism stop moving, and the unwinding roller 2 cannot rotate at this time, thereby effectively ensuring the tightening of the transfer film during the transfer process and ensuring the product quality. After the transfer is completed, the lifting mechanism and the push-pull mechanism move in the opposite direction to separate the gear 4 from the rack 3, and the unwinding roller 2 resumes the unwinding function.

[0023] 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.

[0024] 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.

[0025] In this embodiment, the rack 3 is provided with a driving plate 7, and the driving plate 7 is provided with a driving hole 71 extending in the vertical direction, that is, the driving hole 71 is a waist-shaped hole and is arranged in the vertical direction. The lifting mechanism is connected to the lower end of the driving plate 7, and the push-pull mechanism is connected to the driving hole 71. That is, the push-pull mechanism will not move in the vertical direction. When the lifting mechanism drives the driving plate 7 to drive the rack 3 to move up and down, since the push-pull mechanism is connected to the driving hole 71, the push-pull mechanism will not interfere with the up and down movement of the rack 3. When the push-pull mechanism needs to drive the rack 3 to move, the push-pull mechanism pushes and pulls the inner wall of the driving hole 71, so that the rack 3 moves along the width direction of the driving hole 71.

[0026] In this embodiment, the lifting mechanism is a lifting cylinder b, the cylinder barrel of the lifting cylinder b is connected to the mounting plate 1, and the telescopic rod of the lifting cylinder b is hinged to the driving plate 7. Specifically, a mounting hole is provided on the mounting plate 1, a first mounting seat 8 is provided on the mounting hole, the cylinder barrel of the lifting cylinder b is connected to the first mounting seat 8, and the telescopic rod of the lifting cylinder b passes through the mounting hole to connect to the driving plate 7.

[0027] In this embodiment, the push-pull mechanism is a push-pull cylinder c, the cylinder barrel of the push-pull cylinder c is connected to the mounting plate 1, the telescopic rod of the push-pull cylinder c is connected to a push-pull shaft 9, the push-pull shaft 9 is inserted into the driving hole 71, the axis of the push-pull shaft 9 is perpendicular to the extension direction of the driving hole 71, and the rack 3 is pushed to move by the push-pull shaft 9. During specific installation, the telescopic rod of the push-pull cylinder c is connected to a seat plate, and connecting rods are respectively provided at both ends of the other side of the seat plate, and the two ends of the push-pull shaft 9 are respectively connected to the connecting rods. At the same time, a second mounting seat a is provided on one side of the mounting plate 1, and the cylinder barrel of the push-pull cylinder c is fixed on the second mounting seat a.

[0028] 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 reel unwinding mechanism for a digital printing machine, characterized in that: It includes a mounting plate, an unwinding roller, a rack, a lifting mechanism and a push-pull mechanism arranged on the mounting plate, the unwinding roller includes a connecting part and a supporting part for mounting the coiled material, the connecting part is rotatably arranged on the mounting plate, a gear is provided on the connecting part, the lifting mechanism and the push-pull mechanism are both connected to the rack, and the lifting mechanism is used to drive the rack to move up and down, and the push-pull mechanism is used to drive the rack to engage or separate with the gear.

2. The unwinding mechanism of a digital printing machine 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 the digital printing machine 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 digital printing machine according to claim 1, characterized in that: The rack is provided with a driving plate, the driving plate is provided with a driving hole extending in a vertical direction, the lifting mechanism is connected to the lower end of the driving plate, and the push-pull mechanism is connected to the driving hole.

5. The unwinding mechanism of the digital printing machine according to claim 4, characterized in that: The lifting mechanism is a lifting cylinder, a cylinder barrel of the lifting cylinder is connected to the mounting plate, and a telescopic rod of the lifting cylinder is connected to the driving plate.

6. The unwinding mechanism of a digital printing machine according to claim 5, characterized in that: The mounting plate is provided with a mounting hole, the mounting hole is provided with a first mounting seat, the cylinder barrel of the lifting cylinder is connected to the first mounting seat, and the telescopic rod of the lifting cylinder passes through the mounting hole to connect to the driving plate.

7. The unwinding mechanism of a digital printing machine according to claim 4, characterized in that: The push-pull mechanism is a push-pull cylinder, the cylinder barrel of the push-pull cylinder is connected to the mounting plate, the telescopic rod of the push-pull cylinder is connected to a push-pull shaft, and the push-pull shaft is inserted into the driving hole.

8. The unwinding mechanism of a digital printing machine according to claim 7, characterized in that: A seat plate is connected to the telescopic rod of the push-pull cylinder, connecting rods are respectively arranged at two ends of the other side of the seat plate, and two ends of the push-pull shaft are respectively connected to the connecting rods.

9. The unwinding mechanism of a digital printing machine according to claim 7, characterized in that: A second mounting seat is provided on one side of the mounting plate, and the cylinder barrel of the push-pull cylinder is fixed on the second mounting seat.

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