Doctor blade structure and gravure printing machine

Abstract

The application belongs to the technical field of scraper structure, and discloses a scraper structure and a gravure printing machine, which comprise a frame body, the frame body is fixed with a mounting box, the top of the mounting box is fixed with a mounting frame with a U-shaped structure, a scraper is inserted and connected with the mounting frame, the surface of the scraper combined with a printing roller is a circular arc surface, two clamping plates which are slidingly connected with the mounting frame are arranged through the mounting frame, the two clamping plates are both L-shaped structures, the bottom of the horizontal section of the clamping plate is in abutment with the top of the scraper, the mounting box is provided with a displacement mechanism for driving the two clamping plates to move close to or away from each other and an auxiliary mechanism for driving the scraper to move down or up when the two clamping plates move close to or away from each other. According to the application, the displacement mechanism is used to drive the two clamping plates to move away from each other, and the auxiliary mechanism is used to drive the scraper to move up until the scraper moves out of the mounting frame, so that the scraper can be replaced, and the difficulty of taking out the scraper is reduced.

Description

Technical Field

[0001] This utility model relates to the field of doctor blade structure technology, and in particular to a doctor blade structure and a gravure printing machine. Background Technology

[0002] A gravure printing press is a machine that uses a gravure plate for printing. The image areas of the printing plate are recessed, while the blank areas are on the same plane as the outer circle of the printing cylinder. During gravure printing, the entire printing cylinder is inked. A doctor blade scrapes the ink off the blank areas of the plate, leaving the ink on the image areas. Then, the paper is fed through the press, and the impression cylinder presses the paper from the back, transferring the ink from the recessed areas directly to the paper surface. Finally, the printed matter is stacked or rewound by the paper delivery section.

[0003] Chinese utility model patent CN220349285U discloses a doctor blade mounting structure for a gravure printing machine, including a frame, a doctor blade holder installed inside the frame, a mounting block fixedly installed on the upper surface of the doctor blade holder, a doctor blade inserted into the mounting block, a sliding groove formed on the inner side wall of the mounting block, a sliding rod fixedly installed inside the sliding groove, a first slider slidably connected to the surface of the sliding rod, a clamping plate fixedly installed on one side of the first slider, a plurality of triangular limiting blocks fixedly installed on the surface of the clamping plate, and a first spring installed at one end of the first slider.

[0004] In existing gravure printing presses, the doctor blade mounting structure makes it difficult to remove the doctor blade from between the printing roller and the mounting block because one end of the doctor blade is inserted into the mounting block, while the other end of the doctor blade is in contact with the surface of the printing roller to ensure normal operation. Utility Model Content

[0005] To solve the above problems, this utility model provides a doctor blade structure and a gravure printing machine.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a scraper structure, including a frame, a mounting box fixed on the frame, a U-shaped mounting bracket fixed on the top of the mounting box, a scraper inserted into the mounting bracket, the surface of the scraper that contacts the printing roller being an arc surface, two clamping plates that slide and cooperate with the mounting bracket being disposed through the mounting bracket, both clamping plates being L-shaped structures, the bottom of the horizontal section of the clamping plate abutting against the top of the scraper, and the mounting box being provided with a displacement mechanism for driving the two clamping plates closer or further apart, and an auxiliary mechanism for driving the scraper to descend or ascend when the two clamping plates approach or move further apart.

[0007] By adopting the above technical solution, the two clamping plates are driven to move away from each other by the displacement mechanism, while the auxiliary mechanism drives the scraper to rise until the scraper moves out of the mounting bracket. At this point, the scraper can be replaced, thus reducing the difficulty of removing the scraper.

[0008] Furthermore, the displacement mechanism includes a displacement component, which includes a connecting plate that is slidably mounted on the mounting box, a connecting column that is rotatably mounted on the connecting plate, and an adjusting plate that is rotatably mounted inside the mounting box. The adjusting plate has an adjusting through hole that is slidably mounted on the connecting column. The adjusting through hole is eccentrically positioned with the adjusting plate. The connecting plate is fixed to the clamping plate. The number of connecting plates, the number of connecting columns, the number of adjusting through holes, and the number of clamping plates are all equal and their positions correspond one-to-one. The displacement mechanism also includes a rotating component for driving the adjusting plate to rotate.

[0009] By adopting the above technical solution, the adjusting plate is driven to rotate by the rotating component. Due to the eccentric setting of the adjusting through hole and the adjusting plate, the adjusting through hole and the connecting column are slidably engaged, so that the two connecting columns, the connecting plates connected to the two connecting columns respectively, and the clamping plates connected to the two connecting plates respectively move closer or further away from each other, thereby achieving the purpose of clamping or loosening the scraper.

[0010] Furthermore, the rotating assembly includes a drive column fixed to the adjusting plate and coaxially arranged with the adjusting plate, a worm gear fixedly sleeved on the drive column, and a worm that passes through the mounting box and is rotatably connected to it, wherein the worm meshes with the worm gear.

[0011] By adopting the above technical solution, the worm rotates, causing the worm wheel meshing with the worm, the drive column fixed to the worm wheel, and the adjusting plate connected to the drive column to all rotate, thereby ensuring the normal disassembly or clamping of the scraper.

[0012] Furthermore, the auxiliary mechanism includes a lifting mechanism, which includes a lifting plate that passes through the top of the mounting box, a lifting block fixed to the connecting plate, and a lifting column that is rotatably mounted on the lifting plate. The lifting block has a lifting through hole that slides with the lifting column. The number of lifting blocks, the number of lifting columns, the number of lifting through holes, and the number of connecting plates are all equal and their positions correspond one-to-one. The auxiliary mechanism also includes a limiting component for limiting the lifting plate.

[0013] By adopting the above technical solution, during the movement of the connecting plate away from the axis of the adjusting plate, the lifting block connected to the connecting plate moves. Since the lifting through hole is slidably connected to the lifting column, and the lifting column is connected to the lifting plate, the lifting column passes through the lower horizontal section, the inclined section and the upper horizontal section of the lifting through hole in sequence. During this process, the lifting column drives the lifting plate to rise and pushes the scraper out of the mounting frame so that the scraper can be taken out.

[0014] Furthermore, the limiting component includes a limiting plate fixed to the lifting plate and a limiting block fixed to the top wall inside the mounting box, the limiting block penetrating the lifting plate and slidingly engaging.

[0015] By adopting the above technical solution, the limiting effect of the limiting plate and the limiting block improves the stability of the lifting plate during movement.

[0016] Furthermore, the mounting bracket and the worm gear are jointly provided with a limiting component. A sliding groove is provided on the side wall of the worm gear. The limiting component includes a sliding block that is slidably disposed in the sliding groove, a fixing ring that is fixed to the mounting box and the mounting bracket and is coaxially disposed with the worm gear, and an insert rod that is fixed to the sliding block. A slot that engages with the insert rod is provided on the inner side wall of the fixing ring.

[0017] By adopting the above technical solution, pressing the sliding block causes the insertion rod to move downwards until the insertion rod separates from the slot. At this point, the worm gear can be rotated to clamp or loosen the scraper. The arrangement of the slot and the worm gear improves the stability of the worm gear when it is stationary.

[0018] Furthermore, a spring is fixed to the inner bottom wall of the sliding block and the sliding groove.

[0019] By adopting the above technical solution, when the sliding block is pressed down, the spring is stressed and gradually contracts. When the sliding block is released, the spring gradually extends and returns to its original position, allowing the sliding block to rise and be inserted into the slot. This facilitates the connection between the sliding block and the slot after the sliding block is reset, making the device easier to use.

[0020] Furthermore, the upper end of the insertion rod is rotatably mounted with a roller that fits against the top wall of the slot.

[0021] By adopting the above technical solution, the friction between the insert rod and the inner wall of the fixed ring during the rotation of the worm gear is reduced.

[0022] This application also discloses a gravure printing machine including the aforementioned scraper structure.

[0023] In summary, the present invention has the following beneficial effects: In this application, by setting a displacement mechanism and an auxiliary mechanism, the difficulty of removing the scraper is reduced. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram illustrating the structure of the lifting mechanism in this embodiment of the utility model; Figure 3 This is a schematic diagram of the structure of the limiting component used to highlight an embodiment of this utility model; Figure 4This is a structural schematic diagram of an embodiment of the present invention used to highlight the limiting component; Figure 5 yes Figure 4 Enlarged diagram of point A in the middle.

[0025] In the diagram: 1. Frame; 2. Mounting box; 3. Mounting bracket; 4. Scraper; 5. Clamping plate; 6. Displacement mechanism; 61. Displacement component; 611. Connecting plate; 612. Connecting column; 613. Adjusting disc; 614. Adjusting through hole; 62. Rotating component; 621. Drive column; 622. Worm gear; 623. Worm; 7. Auxiliary mechanism; 71. Lifting mechanism; 711. Lifting plate; 712. Lifting block; 713. Lifting column; 72. Limiting component; 721. Limiting plate; 722. Limiting block; 8. Lifting through hole; 9. Restricting component; 91. Sliding block; 92. Fixing ring; 93. Insert rod; 10. Sliding groove; 11. Slot; 12. Spring; 13. Roller. Detailed Implementation

[0026] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] like Figure 1-5 As shown in the figure, this application discloses a scraper structure, including a frame 1, a displacement mechanism 6, an auxiliary mechanism 7, and a limiting component 9. A mounting box 2 is fixed on the frame 1. A U-shaped mounting bracket 3 is fixed to the top of the mounting box 2, and a scraper 4 is inserted into the mounting bracket 3. The surface of the scraper 4 that contacts the printing roller is an arc surface. Two clamping plates 5 are provided through the mounting bracket 3 and slide in cooperation with the mounting bracket 3. Both clamping plates 5 are L-shaped structures, and the bottom of the horizontal section of the clamping plate 5 abuts against the top of the scraper 4. The displacement mechanism 6 drives the two clamping plates 5 to move away from each other, while the auxiliary mechanism 7 drives the scraper 4 to rise until the scraper 4 moves out of the mounting bracket 3. At this time, the scraper 4 can be replaced, thereby reducing the difficulty of removing the scraper 4.

[0028] The displacement mechanism 6 is mounted on the mounting box 2. The displacement mechanism 6 includes a displacement component 61 and a rotation component 62. The displacement component 61 includes a connecting plate 611, a connecting column 612, and an adjusting plate 613. The connecting plate 611 is slidably mounted on the mounting box 2. The connecting column 612 is rotatably mounted on the connecting plate 611, and the connecting plate 611 is fixed to the clamping plate 5. The adjusting plate 613 is rotatably mounted inside the mounting box 2. The adjusting plate 613 has a through-hole 614 that slidably engages with the connecting column 612. The through-hole 614 and the adjusting plate 613 are eccentrically positioned. The number of connecting plates 611, the number of connecting columns 612, the number of adjusting through-holes 614, and the number of clamping plates 5 are all equal and their positions correspond one-to-one. The adjusting plate 613 is driven to rotate by the rotating component 62. Since the adjusting through hole 614 is eccentrically set with the adjusting plate 613, the adjusting through hole 614 slides with the connecting post 612, thereby causing the two connecting posts 612, the connecting plates 611 connected to the two connecting posts 612 respectively, and the clamping plates 5 connected to the two connecting plates 611 respectively to move closer or further away from each other, so as to achieve the purpose of clamping or loosening the scraper 4.

[0029] The rotating assembly 62 drives the adjusting disc 613 to rotate. The rotating assembly 62 includes a drive column 621, a worm gear 622, and a worm 623. The drive column 621 is fixed to the adjusting disc 613 and coaxially arranged with it. The worm gear 622 is fixedly sleeved on the drive column 621. The worm 623 passes through the mounting box 2 and is rotatably connected to it, meshing with the worm gear 622. Rotation of the worm 623 causes the worm gear 622 meshing with it, the drive column 621 fixed to the worm gear 622, and the adjusting disc 613 connected to the drive column 621 to all rotate, thereby ensuring normal disassembly or clamping of the scraper 4.

[0030] An auxiliary mechanism 7 is mounted on the mounting box 2. This mechanism drives the scraper 4 to descend or rise when the two clamping plates 5 move closer or further apart. The auxiliary mechanism 7 includes a lifting mechanism 71 and a limiting assembly 72. The lifting mechanism 71 includes a lifting plate 711, lifting blocks 712, and lifting columns 713. The lifting plate 711 is disposed through the top of the mounting box 2, and the lifting blocks 712 are fixed to the connecting plate 611. The lifting columns 713 are rotatably mounted on the lifting plate 711. The lifting blocks 712 have through holes 8 that slide with the lifting columns 713. The number of lifting blocks 712, lifting columns 713, lifting holes 8, and connecting plates 611 are all equal and their positions correspond one-to-one. As the connecting plate 611 moves away from the axis of the adjusting plate 613, the lifting block 712 connected to the connecting plate 611 moves. Since the lifting through hole 8 is slidably connected to the lifting column 713, and the lifting column 713 is connected to the lifting plate 711, the lifting column 713 passes through the lower horizontal section, the inclined section and the upper horizontal section of the lifting through hole 8 in sequence. During this process, the lifting column 713 drives the lifting plate 711 to rise and pushes the scraper 4 out of the mounting bracket 3 so that the scraper 4 can be taken out.

[0031] The limiting component 72 is used to limit the movement of the lifting plate 711. The limiting component 72 includes a limiting plate 721, a limiting block 722, and a mounting bracket 3. The limiting plate 721 is fixed to the lifting plate 711, and the limiting block 722 is fixed to the top wall inside the mounting box 2. The limiting block 722 passes through the lifting plate 711 and slides in engagement with it. The limiting function of the limiting plate 721 and the limiting block 722 improves the stability of the lifting plate 711 during movement.

[0032] The limiting component 9 is jointly disposed on the mounting bracket 3 and the worm gear 623. A sliding groove 10 is formed on the side wall of the worm gear 623. The limiting component 9 includes a sliding block 91, a scraper 4, a fixing ring 92, and a plug rod 93. The sliding block 91 is slidably disposed in the sliding groove 10. The fixing ring 92 is jointly fixed on the mounting box 2 and the mounting bracket 3 and is coaxially disposed on the worm gear 623. The plug rod 93 is fixed on the sliding block 91. A slot 11 is formed on the inner side wall of the fixing ring 92 to engage with the plug rod 93. Pressing the sliding block 91 moves the plug rod 93 downward until the plug rod 93 separates from the slot 11. At this time, the worm gear 623 can be rotated to clamp or loosen the scraper 4. The slot 11 and the worm gear 623 improve the stability of the worm gear 623 when it is stationary.

[0033] A spring 12 is fixed to the inner bottom wall of the sliding block 91 and the sliding groove 10. When the sliding block 91 is pressed down, the spring 12 is stressed and gradually contracts. When the sliding block 91 is released, the spring 12 gradually extends and returns to its original position, and the sliding block 91 can rise and be inserted into the slot 11. This facilitates the connection between the sliding block 91 and the slot 11 after the sliding block 91 is reset, making the device easier to use.

[0034] The upper end of the insertion rod 93 is rotatably mounted with a roller 13 that fits against the inner top wall of the slot 11. This reduces the friction between the insertion rod 93 and the inner side wall of the retaining ring 92 during the rotation of the worm gear 623.

[0035] This application also discloses a gravure printing machine including the aforementioned doctor blade structure.

[0036] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A scraper structure, comprising a frame (1), characterized in that: The frame (1) is fixed with a mounting box (2), and the top of the mounting box (2) is fixed with a U-shaped mounting bracket (3). A scraper (4) is inserted into the mounting bracket (3). The surface of the scraper (4) that is in contact with the printing roller is an arc surface. Two clamping plates (5) that slide in contact with the mounting bracket (3) are provided through the mounting bracket (3). Both clamping plates (5) are L-shaped structures. The bottom of the horizontal section of the clamping plate (5) abuts against the top of the scraper (4). The mounting box (2) is provided with a displacement mechanism (6) for driving the two clamping plates (5) to move closer or further away from each other, and an auxiliary mechanism (7) for driving the scraper (4) to descend or rise when the two clamping plates (5) move closer or further away from each other.

2. The scraper structure according to claim 1, characterized in that: The displacement mechanism (6) includes a displacement component (61), which includes a connecting plate (611) that is slidably mounted on the mounting box (2), a connecting column (612) that is rotatably mounted on the connecting plate (611), and an adjusting plate (613) that is rotatably mounted inside the mounting box (2). The adjusting plate (613) has an adjusting through hole (614) that is slidably mounted on the connecting column (612). The adjusting through hole (614) is eccentrically mounted on the adjusting plate (613). The connecting plate (611) is fixed to the clamping plate (5). The number of connecting plates (611), the number of connecting columns (612), the number of adjusting through holes (614), and the number of clamping plates (5) are all equal and their positions correspond one-to-one. The displacement mechanism (6) also includes a rotating component (62) for driving the adjusting plate (613) to rotate.

3. The scraper structure according to claim 2, characterized in that: The rotating assembly (62) includes a drive column (621) fixed on the adjusting plate (613) and coaxially arranged with the adjusting plate (613), a worm wheel (622) fixedly sleeved on the drive column (621), and a worm (623) that passes through the mounting box (2) and is rotatably connected to it. The worm (623) meshes with the worm wheel (622).

4. The scraper structure according to claim 2, characterized in that: The auxiliary mechanism (7) includes a lifting mechanism (71), which includes a lifting plate (711) that is disposed through the top of the mounting box (2), a lifting block (712) fixed on the connecting plate (611), and a lifting column (713) that is rotatably mounted on the lifting plate (711). The lifting block (712) is provided with a lifting through hole (8) that slides with the lifting column (713). The number of lifting blocks (712), the number of lifting columns (713), the number of lifting through holes (8), and the number of connecting plates (611) are all equal and their positions correspond one-to-one. The auxiliary mechanism (7) also includes a limiting component (72) for limiting the lifting plate (711).

5. The scraper structure according to claim 4, characterized in that: The limiting component (72) includes a limiting plate (721) fixed on the lifting plate (711) and a limiting block (722) fixed on the inner top wall of the mounting box (2). The limiting block (722) passes through the lifting plate (711) and slides in cooperation with it.

6. The scraper structure according to claim 3, characterized in that: The mounting bracket (3) and the worm gear (623) are provided with a limiting component (9). A sliding groove (10) is provided on the side wall of the worm gear (623). The limiting component (9) includes a sliding block (91) slidably disposed in the sliding groove (10), a fixing ring (92) fixed on the mounting box (2) and the mounting bracket (3) and coaxially disposed with the worm gear (623), and a plug rod (93) fixed on the sliding block (91). A slot (11) is provided on the inner side wall of the fixing ring (92) for insertion and cooperation with the plug rod (93).

7. A scraper structure according to claim 6, characterized in that: The sliding block (91) and the inner bottom wall of the sliding groove (10) are fixed with a spring (12).

8. A scraper structure according to claim 6, characterized in that: The upper end of the insert (93) is rotatably mounted with a roller (13) that fits against the inner top wall of the slot (11).

9. A gravure printing machine comprising a doctor blade structure as described in any one of claims 1-8.

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