Paper guiding mechanism of lithographic printing machine

Abstract

The utility model discloses a lithographic printing machine paper guiding mechanism which comprises elevators, a bearing table for bearing paper is arranged at the moving end of the first elevator, a beam frame is arranged at the moving end of the second elevator, and a guiding frame is arranged on the beam frame. The guide frame comprises a fixed guide plate and a movable guide plate, and the movable guide plate can be driven to enable the guide face to be attached to the edge of the paper. The utility model relates to the technical field of printing machines, the first movable guide plate and the second movable guide plate are driven to turn over, so that the guide surfaces are attached to the edge of paper, the paper is extruded and calibrated between the corresponding fixed guide plates, the twisting and dislocation phenomena generated in the packaging, transporting and storing processes of the original paper can be effectively eliminated, and the production efficiency is improved. The edge of the paper is tightly attached to the guide surface, so that the paper is neatly stacked, and the problems of paper jam, deflection and the like in the subsequent feeding process are avoided. The mechanism can adapt to raw paper with different thicknesses and different specifications.

Description

Technical Field

[0001] This utility model relates to the field of printing press technology, specifically to a paper guiding mechanism for a offset printing press. Background Technology

[0002] In the printing industry, offset printing presses are widely used due to their high efficiency and high quality. The workflow of an offset printing press mainly includes steps such as loading, feeding, printing, and unloading. Among these, the loading stage is the process of transforming the raw paper to be printed from a stored state into a state that can be automatically fed by the printing press; its efficiency and stability are crucial to the entire printing process.

[0003] Currently, offset printing presses generally use lifting devices to raise the raw paper to the feeding section. Specifically, operators first need to manually unpack the packaged raw paper, and then stack the unpacked paper onto the lifting device. This feeding method inevitably results in some twisting and misalignment during manual unpacking and stacking, requiring subsequent manual calibration to ensure neat stacking. Furthermore, it's impossible to guarantee that the force and direction of each calibration are completely consistent. This method is inefficient and also affects the subsequent printing quality. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a paper guiding mechanism for a offset printing press, which solves the problem of twisting and misalignment caused by manual unpacking and stacking of raw paper during the feeding process.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a paper guiding mechanism for a lithographic printing press, including a lifting mechanism, wherein the lifting mechanism includes a main body and a first lifting mechanism and a second lifting mechanism disposed on the main body;

[0006] The first elevator has a receiving platform for receiving paper at its moving end, and the second elevator has a beam frame at its moving end, on which a guide frame is provided. The guide frame includes a fixed guide plate and a movable guide plate. The inner wall of the movable guide plate has a guide surface, wherein the movable guide plate can be driven to make the guide surface fit against the edge of the paper.

[0007] Preferably, there are two fixed guide plates, which are disposed on two adjacent sides of the beam frame; the inner wall surface of the fixed guide plate is a flat, mating surface.

[0008] Preferably, there are two movable guide plates, including a first movable guide plate and a second movable guide plate disposed on two adjacent sides of the beam frame, wherein the first movable guide plate and the second movable guide plate are respectively disposed opposite to two fixed guide plates.

[0009] Preferably, the outer walls of the first movable guide plate and the second movable guide plate are respectively provided with a second main shaft and a first main shaft; wherein, driving the second main shaft and the first main shaft to rotate causes the first movable guide plate and the second movable guide plate to flip to the top of the beam frame or to the outside of the beam frame.

[0010] Preferably, the first and second movable guide plates are in a vertical state when they are flipped over above the beam frame.

[0011] Preferably, one end of the first spindle is provided with a driving member and the other end is provided with a transmission gear, and one end of the second spindle is provided with a driven gear that meshes with the transmission gear.

[0012] Preferably, the driving element includes:

[0013] A telescopic rod is fixed to the beam frame; a straight rack is fixed to the output end of the telescopic rod.

[0014] The drive gear is fixed to the end of the first main shaft and meshes with the spur rack.

[0015] Preferably, a conveyor belt is provided on one side of the receiving platform.

[0016] Preferably, the beam frame is arranged around the receiving platform and moves up and down above the receiving platform.

[0017] The beneficial effects of this utility model are as follows: By using the paper guiding mechanism for a offset printing press provided by this utility model, a vertically movable guide frame is set above the receiving platform for the raw paper. This guide frame can be freely adjusted to the position of the unpacked raw paper after stacking, according to the stacking height of the raw paper. The first and second movable guide plates are driven to rotate, and during the repeated rotation, a repeated tapping effect is generated on the edge of the paper, so that the guide surface is in contact with the edge of the paper, and the paper is squeezed and aligned between its corresponding fixed guide plates. This effectively eliminates the twisting and misalignment of the raw paper during packaging, transportation, and storage, ensuring that the edge of the paper is tightly attached to the guide surface, thereby ensuring neat stacking of the paper and avoiding problems such as paper jams and skewing during subsequent feeding. This mechanism can adapt to raw paper of different thicknesses and specifications without the need for complex adjustment operations, further improving the flexibility and efficiency of feeding. Attached Figure Description

[0018] Figure 1 This is the front view of the present utility model;

[0019] Figure 2 This is a top view of the present invention;

[0020] Figure 3 This is an isometric drawing of the guide frame of this utility model;

[0021] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0022] Figure 5 This utility model Figure 3 Enlarged structural diagram at point B.

[0023] Explanation of the reference numerals in the figure:

[0024] 1. Hoist, 1a. First hoist, 1b. Second hoist, 2. Guide frame, 21. Fixed guide plate, 22. First movable guide plate, 23. Second movable guide plate, 24. Telescopic rod, 25. Spur rack, 26. Drive gear, 27. First main shaft, 28. Transmission gear, 29. Driven gear, 210. Second main shaft, 3. Receiving platform, 4. Conveyor belt, 5. Beam frame. Detailed Implementation

[0025] To better explain and facilitate understanding of the present invention, a detailed description of the invention is provided below with reference to the accompanying drawings and specific embodiments. This utility model discloses a paper guiding mechanism for a offset printing press, including a lifting mechanism. The lifting mechanism comprises a main body and a first lifting mechanism and a second lifting mechanism mounted on the main body. The moving end of the first lifting mechanism is provided with a receiving platform for receiving paper, and the moving end of the second lifting mechanism is provided with a beam frame, on which a guide frame is mounted. The guide frame includes a fixed guide plate and a movable guide plate. The inner wall surface of the movable guide plate has a guide surface, and the movable guide plate can be driven to make the guide surface adhere to the edge of the paper. By driving the first and second movable guide plates to rotate repeatedly, a repeated slapping effect is generated on the edge of the paper during the repeated rotation, causing the guide surface to adhere to the edge of the paper and squeezing and aligning the paper between its corresponding fixed guide plates. This effectively eliminates the twisting and misalignment of the original paper during packaging, transportation, and storage, thereby ensuring neat stacking of the paper.

[0026] The following will refer to the embodiments of this utility model. Figures 1 to 5 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Various changes can be made to the implementation schemes as long as the effects of this utility model can be achieved.

[0027] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0028] like Figure 1 and Figure 2As shown in the embodiment of this application, a guiding mechanism is proposed, including a hoist 1. The hoist 1 includes a main body and a first hoist 1a and a second hoist 1b disposed on the main body; both the first hoist 1a and the second hoist 1b are reciprocating hoists. In a preferred embodiment, the first hoist 1a and the second hoist 1b are respectively disposed on the front and rear surfaces of the main body.

[0029] like Figure 1 and Figure 2 As shown, the first elevator 1a has a receiving platform 3 for receiving paper at its moving end, and a conveyor belt 4 is provided on one side of the receiving platform 3. The conveyor belt 4 includes a placement section and a moving section, with the output end of the moving section positioned close to the receiving platform 3. In use, the packaged printing paper is unpacked on the placement section and then conveyed to the receiving platform 3 via the moving section. It should be noted that when the packaging paper is output from the conveyor belt 4, the receiving platform 3 is driven by the first elevator 1a to make the receiving platform 3 flush with the conveyor belt 4, ensuring that the unpacked printing paper is smoothly conveyed to the receiving platform 3.

[0030] like Figure 2 and Figure 3 As shown, the moving end of the second elevator 1b is equipped with a beam frame 5, which consists of two beam arms and a rectangular frame. The beam arms are located on both sides of the main body and slide on the main body via sliders. The beam frame 5 is fixed to the ends of the beam arms. The beam frame 5 is arranged around the receiving platform 3 and is driven by the second elevator 1b to move up and down above the receiving platform 3, guiding the misaligned papers that are continuously stacked on the receiving platform 3 to a vertical state.

[0031] like Figure 3 As shown, a guide frame 2 is installed on the beam frame 5. The guide frame 2 includes a fixed guide plate 21 and a movable guide plate, which together form a rectangular hollow frame for passing stacked papers. The inner wall of the movable guide plate has a guide surface, which is planar. The movable guide plate can be driven to make the guide surface fit against the edge of the paper, guiding the misaligned paper to a vertical position.

[0032] Specifically, there are two fixed guide plates 21, which are set on the two adjacent sides of the beam frame 5. Specifically, one guide plate 21 is set on the front of the hoist 1, and the other is set on the adjacent side. The inner wall surface of the fixed guide plate 21 is a flat and fitting surface.

[0033] Specifically, there are two movable guide plates, including a first movable guide plate 22 and a second movable guide plate 23 set on two adjacent sides of the beam frame 5. The first movable guide plate 22 and the second movable guide plate 23 are respectively set opposite to two fixed guide plates 21. The first movable guide plate 22 and the second movable guide plate 23 are driven to make the guide surface fit against the edge of the paper, squeeze and calibrate the paper between the corresponding fixed guide plates 21, and guide the paper to a vertical state.

[0034] like Figures 3 to 5 As shown, the outer walls of the first movable guide plate 22 and the second movable guide plate 23 are respectively provided with a second main shaft 210 and a first main shaft 27. It should be noted that both the first main shaft 27 and the second main shaft 210 are fixed to the beam frame 5 via bearing seats. Driving the second main shaft 210 and the first main shaft 27 to rotate causes the first movable guide plate 22 and the second movable guide plate 23 to flip above or to the outside of the beam frame 5. During the repeated flipping of the first movable guide plate 22 and the second movable guide plate 23, a "slapping" effect is created on the edge of the paper, thereby gradually aligning the paper to a vertical position.

[0035] It should be noted that when the first movable guide plate 22 and the second movable guide plate 23 are flipped above the beam frame 5, they are in a vertical state, thereby ensuring that when the first movable guide plate 22 and the second movable guide plate 23 contact the edge of the paper, the stacked paper can be aligned to a vertical position.

[0036] like Figure 4 and Figure 5 As shown, in this embodiment, to achieve the rotation of the first spindle 27 and the second spindle 210 to realize the flipping of the first movable guide plate 22 and the second movable guide plate 23, a driving member is provided at one end of the first spindle 27, and a transmission gear 28 is provided at the other end. A driven gear 29 that meshes with the transmission gear 28 is provided at one end of the second spindle 210. It should be noted that both the transmission gear 28 and the driven gear 29 are equal-diameter bevel gears, which can transmit the rotation of the first spindle 27 to the second spindle 210, realizing the synchronous rotation of the first spindle 27 and the second spindle 210.

[0037] like Figure 4 As shown, the driving component includes a telescopic rod 24 and a drive gear 26, wherein the telescopic rod 24 is an electrically operated telescopic rod. The telescopic rod 24 is fixed to the beam frame 5, and a spur rack 25 is fixed to its output end; the drive gear 26 is fixed to the end of the first main shaft 27 and meshes with the spur rack 25, forming a gear and rack structure. In specific implementation, the telescopic rod 24 drives the drive gear 26 to rotate in both directions, causing the first main shaft 27 to reciprocate in both directions. Meanwhile, the meshing of the transmission gear 28 and the driven gear 29 causes the second main shaft 210 to synchronously reciprocate in both directions.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lithographic printing press sheet guide mechanism characterised in that: The lifting machine comprises a main body and a first lifting machine and a second lifting machine arranged on the main body; The moving end of the first lifting machine is provided with a receiving table for receiving paper, and the moving end of the second lifting machine is provided with a beam frame, and a guide frame is arranged on the beam frame; the guide frame comprises fixed guide plates and movable guide plates, and the inner wall surface of the movable guide plates has a guide surface, wherein the movable guide plates can be driven to make the guide surface fit at the edge of the paper.

2. A sheet guide mechanism for a lithographic printing press according to claim 1, wherein: The fixed guide plates are two and are arranged on the two adjacent sides of the beam frame; the inner wall surface of the fixed guide plates is a flat fitting surface.

3. A sheet guide mechanism for a lithographic printing press according to claim 1, wherein: The movable guide plates are two and comprise a first movable guide plate and a second movable guide plate arranged on the two adjacent sides of the beam frame, and the first movable guide plate and the second movable guide plate are arranged opposite to the two fixed guide plates respectively.

4. A sheet guide mechanism for a lithographic printing press according to claim 3, wherein: The outer wall surface of the first movable guide plate and the second movable guide plate is respectively provided with a second main shaft and a first main shaft; wherein driving the second main shaft and the first main shaft to rotate makes the first movable guide plate and the second movable guide plate turn over to the upper side of the beam frame or turn over to the outer side of the beam frame.

5. A sheet guide mechanism for a lithographic printing press according to claim 4, wherein: The first movable guide plate and the second movable guide plate are in a vertical state when they are turned over to the upper side of the beam frame.

6. A sheet guide mechanism for a lithographic printing press according to claim 4 wherein: One end of the first main shaft is provided with a driving member, and the other end is provided with a transmission gear, and one end of the second main shaft is provided with a driven gear engaged with the transmission gear.

7. A sheet guide mechanism for a lithographic printing press according to claim 6, wherein: The driving member comprises: A telescopic rod is fixed on the beam frame; the output end of the telescopic rod is fixed with a straight rack; A driving gear is fixed on the end of the first main shaft and engaged with the straight rack.

8. A lithographic printing press sheet guide according to claim 1 wherein: One side of the receiving table is provided with a conveying belt.

9. A lithographic printing press sheet guide according to claim 1 wherein: The beam frame is arranged around the receiving table and moves up and down above the receiving table.

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