Adjustable limiting mechanism of paperboard printing machine

Abstract

The utility model discloses an adjustable limiting mechanism of a paperboard printing machine, which comprises a printing machine paperboard placing table, and the bottom of the printing machine paperboard placing table is fixedly connected with a fixing frame. The fixing frame is arranged at the bottom of the paperboard placing table of the printing machine, a meshing structure of the gear and the two symmetrically-distributed driving frames is designed in the fixing frame, and the driving frames on the two sides can be synchronously driven to slide reversely along the sliding grooves through rotation of the gear, so that the top limiting plate is driven to move stably; precision limiting adjustment of paperboards with different widths is achieved, the locking frame can be stably inserted into the inserting groove under the elastic force effect of the compression spring, rigid positioning is formed, and the problem that limiting is unstable due to static friction locking of a screw in the prior art is solved. Locking can be released by pulling the locking frame through the handle, the adjusting precision and locking stability of the limiting mechanism are effectively improved, printing quality defects caused by limiting deviation are reduced, and the device has the advantages of being high in stability and convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of cardboard printing machine technology, specifically to an adjustable limiting mechanism for a cardboard printing machine. Background Technology

[0002] A printing press is a machine for printing text and images. A modern printing press generally consists of mechanisms for plate mounting, inking, printing, and paper feeding (including folding). Its working principle is as follows: first, the text and images to be printed are made into a printing plate, which is then mounted on the printing press. Ink is then applied manually or by the printing press to the areas of the printing plate containing the text and images, and the ink is directly or indirectly transferred to paper or other printing substrates (such as textiles, metal plates, plastics, leather, wood, glass, and ceramics), thus reproducing a printed product identical to the printing plate. The invention and development of the printing press has played a vital role in the dissemination of human civilization and culture.

[0003] With the rapid development of the express delivery industry, corrugated cardboard printing has become a significant part of the printing industry. In the printing process, the worker first places a stack of cardboard to be printed at the feeding end of the printing machine. Then, the feeding mechanism at the bottom of the feeding end (usually using suction cups to move the cardboard) transports the cardboard sheets one by one into the printing machine for printing. Finally, the printed cardboard is sent out from the end of the printing machine. To accommodate printing on cardboard of different sizes, the printing press has an adjustable baffle at the feeding end to limit the width of cardboard. The structure used for adjusting the baffle typically consists of two parallel rods. Two F-shaped support frames are movably connected to the upper rod. The top opening of the support frame engages with the upper rod, and the sides of the support frame rest against the lower rod, preventing deflection. A screw is threaded onto the top of the support frame. To adjust the position of the support frame, first loosen the screw, then move the support frame along the length of the rod. Once the position is correct, tighten the screw and press it against the upper rod. Simultaneously, two limiting plates located on the sides of the two support frames limit the sides of the cardboard, ensuring stable feeding into the printing press. However, since the support frame and the rod are connected by the static friction of the screw, it is easy to cause poor stability in limiting the cardboard. Therefore, it is necessary to design and modify the adjustable limiting mechanism of the cardboard printing machine to effectively prevent the phenomenon of poor limiting stability. Utility Model Content

[0004] To address the problems mentioned in the background art, the purpose of this utility model is to provide an adjustable limiting mechanism for a cardboard printing machine, which has the advantages of high stability and ease of use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an adjustable limiting mechanism for a cardboard printing machine, comprising a cardboard placement platform for the printing machine, a fixed frame fixedly connected to the bottom of the cardboard placement platform, a gear rotatably connected to the top of the inner wall of the fixed frame, sliding grooves provided on both sides of the top of the inner wall of the fixed frame, and a drive frame slidably connected inside the sliding grooves, teeth fixedly connected to the surface of the drive frame, the number of teeth being several, the teeth meshing with the gear, and the two drive frames being axially symmetrically distributed, limiting plates slidably connected to the front and rear sides of the top of the cardboard placement platform for the printing machine, the limiting plates being fixedly connected to the drive frames, slots provided on the right side of the front drive frame, the number of slots being several, the slots being evenly distributed on the right side of the drive frame, a locking frame slidably connected inside the fixed frame, the locking frame inserting into the slots, a compression spring fixedly connected to the right side of the inner wall of the fixed frame, the other end of the compression spring being fixedly connected to the locking frame, the right side of the locking frame extending to the right side of the fixed frame and fixedly connected to a handle, and a handle fixedly connected to the front of the front drive frame.

[0006] As a preferred embodiment of the present invention, the surface of the limiting plate is provided with a sliding groove, and the number of sliding grooves is several, and the sliding grooves are evenly distributed on the surface of the limiting plate. A movable column is slidably connected inside the sliding groove, and a baffle is fixedly connected to the top of the movable column.

[0007] In a preferred embodiment of this invention, an electric cylinder is fixedly connected to the surface of the limiting plate, a fixing block is fixedly connected to the surface of the baffle, and the output end of the electric cylinder is fixedly connected to the fixing block.

[0008] As a preferred embodiment of this utility model, the top of the printing press cardboard placement platform is provided with anti-slip circular grooves, and the number of anti-slip circular grooves is several, which are evenly distributed on the top of the printing press cardboard placement platform.

[0009] As a preferred embodiment of this invention, a positioning rod is inserted into the inside of the anti-slip circular groove, and a pull ring is fixedly connected to the top of the positioning rod.

[0010] As a preferred embodiment of this utility model, a bearing is fixedly connected inside the fixed frame, and the outer ring of the bearing is fixedly connected to the fixed frame, while the inner ring of the bearing is fixedly connected to the gear. The surface of the compression spring is coated with anti-rust paint.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This utility model employs a fixed frame at the bottom of the printing press cardboard placement table, with gears meshing with two symmetrically distributed drive frames within the frame. The rotation of the gears synchronously drives the drive frames on both sides to slide in opposite directions along the slide groove, thereby causing the top limiting plate to move smoothly and achieving precise limiting adjustment for cardboard of different widths. Simultaneously, several slots on the sides of the drive frames cooperate with locking frames that slide within the fixed frame. Under the action of a spring, the locking frames can stably insert into the slots, forming a rigid positioning, avoiding the instability problem caused by traditional screw-based static friction locking. The locking frame can be released by pulling the handle, making operation simple and quick. This effectively improves the adjustment accuracy and locking stability of the limiting mechanism, ensuring the cardboard maintains a stable position during printing and reducing printing quality defects caused by limiting offset. This device has the advantages of high stability and ease of use.

[0013] 2. This utility model features multiple sliding grooves evenly arranged on the surface of the limiting plate, with a movable column and a top baffle slidably connected within the sliding grooves. This allows the baffle to be flexibly adjusted along the sliding grooves, enabling the height of the baffle to be adjusted according to the height of the cardboard stack. For example, when a tall cardboard stack is placed on top of the cardboard placement table of the printing machine, the operator can adjust the baffle to move upwards to improve the limiting effect on the cardboard. This, in turn, causes the movable column to slide upwards along the sliding grooves. Under the action of the movable column and the baffle, the cardboard stack is effectively limited, thereby improving the limiting effect of this device on the cardboard. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a bottom view of the structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the positioning rod structure of this utility model;

[0017] Figure 4 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0018] In the diagram: 1. Printing machine cardboard placement table; 2. Fixing frame; 3. Gear; 4. Drive frame; 5. Tooth; 6. Limiting plate; 7. Slot; 8. Locking frame; 9. Compression spring; 10. Handle; 11. Movable column; 12. Baffle; 13. Fixing block; 14. Electric cylinder; 15. Handle; 16. Anti-slip groove; 17. Positioning rod; 18. Pull ring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figures 1 to 4 As shown, an adjustable limiting mechanism for a cardboard printing machine includes a cardboard placement platform 1. A fixed frame 2 is fixedly connected to the bottom of the cardboard placement platform 1. A gear 3 is rotatably connected to the top of the inner wall of the fixed frame 2. Slide grooves are provided on both sides of the top of the inner wall of the fixed frame 2, and drive frames 4 are slidably connected inside the slide grooves. Teeth 5 are fixedly connected to the surface of the drive frames 4. The number of teeth 5 is several, and the teeth 5 mesh with the gear 3. The two drive frames 4 are axially symmetrically distributed. The front and rear sides of the top of the cardboard placement platform 1 can slide. A limiting plate 6 is connected and fixedly connected to the drive frame 4. A slot 7 is provided on the right side of the front drive frame 4. There are several slots 7, which are evenly distributed on the right side of the drive frame 4. A locking frame 8 is slidably connected inside the fixed frame 2. The locking frame 8 is inserted into the slot 7. A compression spring 9 is fixedly connected to the right side of the inner wall of the fixed frame 2. The other end of the compression spring 9 is fixedly connected to the locking frame 8. The right side of the locking frame 8 extends to the right side of the fixed frame 2 and is fixedly connected to a handle 10. A handle 15 is fixedly connected to the front of the front drive frame 4.

[0021] refer to Figure 1 The surface of the limiting plate 6 is provided with sliding grooves, and there are several sliding grooves. The sliding grooves are evenly distributed on the surface of the limiting plate 6, and the sliding grooves are slidably connected to the inside of the sliding grooves. The top of the sliding grooves is fixedly connected to the baffle 12.

[0022] As a technical optimization of this utility model, multiple sliding grooves are evenly arranged on the surface of the limiting plate 6, and the movable column 11 and the top baffle 12 are slidably connected in the sliding grooves. This allows the baffle 12 to be flexibly adjusted along the direction of the sliding grooves. The height of the baffle 12 can be adjusted according to the height of the cardboard stack. For example, when a tall cardboard stack is placed on the top of the cardboard placement table 1 of the printing machine, in order to improve the limiting effect on the cardboard, the operator can adjust the baffle 12 to move upward, thereby driving the movable column 11 to slide upward along the sliding groove. Under the action of the movable column 11 and the baffle 12, the cardboard stack is effectively limited, thereby improving the limiting effect of this device on the cardboard.

[0023] refer to Figure 1 An electric cylinder 14 is fixedly connected to the surface of the limiting plate 6, and a fixing block 13 is fixedly connected to the surface of the baffle 12. The output end of the electric cylinder 14 is fixedly connected to the fixing block 13.

[0024] As a technical optimization of this utility model, by fixing an electric cylinder 14 on the surface of the limiting plate 6 and connecting the output end of the electric cylinder 14 to the fixing block 13 on the surface of the baffle 12, the height of the baffle 12 is automatically adjusted. The electric cylinder 14 can precisely drive the baffle 12 to move along the sliding groove according to the instructions of the control system, which replaces the cumbersome operation of manually adjusting the baffle 12 in the traditional way. This not only reduces the labor intensity of workers, but also improves the adjustment efficiency and position accuracy.

[0025] refer to Figure 1 The top of the printing press cardboard placement table 1 is provided with anti-slip grooves 16. There are several anti-slip grooves 16, which are evenly distributed on the top of the printing press cardboard placement table 1.

[0026] As a technical optimization of this utility model, multiple anti-slip grooves 16 are evenly arranged on the top of the printing press cardboard placement table 1. The anti-slip grooves 16 increase the surface roughness and contact area of ​​the printing press cardboard placement table 1, which can effectively increase the friction between the cardboard and the printing press cardboard placement table 1. When the cardboard is placed on the table, the anti-slip grooves 16 can prevent the cardboard from sliding due to the traction force or vibration of the feeding mechanism. Especially in high-speed printing or when the cardboard surface is smooth, this anti-slip design can significantly improve the positioning stability of the cardboard. The evenly distributed grooves make the friction force more evenly distributed in all areas of the table, avoiding cardboard offset caused by local sliding, thereby reducing quality problems such as misregistration and pattern skew caused by changes in cardboard position during the printing process, and effectively improving the printing yield.

[0027] refer to Figure 1 A positioning rod 17 is inserted into the inside of the anti-slip groove 16, and a pull ring 18 is fixedly connected to the top of the positioning rod 17.

[0028] As a technical optimization of this utility model, a positioning rod 17 is inserted into the anti-slip circular groove 16, and a pull ring 18 is set on the top of the positioning rod 17. The positioning rod 17 can be inserted into the circular groove to assist in the positioning of the cardboard edge or specific position. When it is necessary to fix cardboard of special size or to position it precisely, the positioning rod 17 can be inserted into the circular groove at the corresponding position. The height of the positioning rod 17 protrudes from the table surface to form a physical barrier to prevent the cardboard from shifting laterally or longitudinally during feeding. The pull ring 18 facilitates quick picking and putting away of the positioning rod 17, making the operation simple and convenient. The combination of the positioning rod 17 and the anti-slip circular groove 16 not only retains the basic anti-slip function of the anti-slip circular groove 16, but also adds an adjustable auxiliary positioning function, forming a double positioning guarantee, which further improves the adaptability and reliability of the limiting mechanism to complex printing needs.

[0029] refer to Figure 2The fixed frame 2 is internally fixedly connected to a bearing, and the outer ring of the bearing is fixedly connected to the fixed frame 2, while the inner ring of the bearing is fixedly connected to the gear 3. The surface of the compression spring 9 is coated with anti-rust paint.

[0030] As a technical optimization of this utility model, by setting a bearing in the fixed frame 2 and fixing the gear 3 to the inner ring of the bearing, the low friction characteristics of the bearing reduce the resistance when the gear 3 rotates, making the adjustment process of the drive frame 4 smoother and more flexible, and reducing adjustment errors caused by mechanical jamming. At the same time, the surface of the compression spring 9 is sprayed with anti-rust paint, which effectively isolates the corrosive substances such as water vapor and ink that may exist in the printing environment, slows down the oxidation and corrosion rate of the compression spring 9, and extends the service life and elastic stability of the compression spring 9. The application of bearings improves the operating feel and adjustment accuracy of the limit mechanism, while the anti-rust treatment reduces the maintenance frequency and cost of the mechanism, ensuring the stability and reliability of the limit mechanism in long-term use, and making it more suitable for the continuous operation requirements of the printing press.

[0031] The working principle and usage process of this utility model are as follows: When using cardboard of different widths, start adjusting the position of the limiting plate 6. First, grasp the handle 10 on the right side of the front drive frame 4 with your right hand and pull it to the right, causing the locking frame 8 to disengage from the slot 7 on the right side of the drive frame 4. At this time, the compression spring 9 is compressed. Next, grasp the handle 15 on the front of the front drive frame 4 with your left hand and pull the drive frame 4 back and forth. This drives the gear 3 to rotate in the bearing at the top of the inner wall of the fixed frame 2 through the teeth 5. Since the two drive frames 4 are axially symmetrically distributed and the teeth 5 on their surfaces mesh with the gear 3, the rotation of the gear 3 will synchronously drive the two drive frames 4 to slide in the opposite direction along the sliding groove at the top of the inner wall of the fixed frame 2, thereby causing the limiting plates 6 on the front and rear sides of the top of the cardboard placement table 1 of the printing press to move closer or further away synchronously. During the adjustment process, observe the movement position of the limiting plate 6 according to the actual width of the cardboard until a suitable limiting space is reserved between the inner side of the limiting plate 6 and the two edges of the cardboard.

[0032] After the position adjustment is completed, release the handle 10. Under the elastic force of the compression spring 9, the locking frame 8 moves to the left and inserts into the corresponding slot 7 on the right side of the drive frame 4, achieving rigid locking of the drive frame 4 and ensuring that the limiting plate 6 will not be displaced due to vibration or other factors during the printing process. At this time, the limiting plate 6 forms a stable limiting support through the meshing structure of the gear 3 and the drive frame 4 and the insertion and locking of the locking frame 8, avoiding the limiting instability problem that is prone to occur in traditional screw static friction locking.

[0033] Next, adjust the position of the baffle 12 according to the height of the cardboard stack. Activate the electric cylinder 14 on the surface of the limit plate 6. The output end of the electric cylinder 14 pushes or pulls the fixed block 13 on the surface of the baffle 12, causing the baffle 12 and the movable column 11 to move automatically up and down along the sliding groove, precisely adjusting to the preset height. This automated adjustment method not only reduces the labor intensity of workers, but also improves adjustment efficiency and positional accuracy.

[0034] When placing cardboard on top of the cardboard placement table 1 of the printing press, the cardboard is first neatly stacked on the table surface. To enhance the stability of the cardboard placement, positioning rods 17 can be inserted into the anti-slip grooves 16 according to the size and positioning requirements of the cardboard. The anti-slip grooves 16 are evenly distributed on the top of the placement table. After the positioning rods 17 are inserted, the top of the positioning rods 17 protrudes from the table surface, forming auxiliary positioning for the edges of the cardboard and preventing the cardboard from shifting laterally or longitudinally during feeding. The pull ring 18 is designed for quick and easy removal and placement of the positioning rods 17, making operation simple and convenient. It combines the basic anti-slip function of the anti-slip grooves 16 with the auxiliary positioning function of the positioning rods 17, forming a double positioning guarantee. The height of the positioning rods 17 can be selected according to different needs.

[0035] The aforementioned printing press cardboard placement platform 1 is a common existing technology, mainly used for temporary support and storage of cardboard stacks, and will not be described in detail in this application.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] 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. An adjustable limiting mechanism for a cardboard printing machine, comprising a cardboard placement table (1) for the printing machine, characterized in that: The bottom of the printing press cardboard placement table (1) is fixedly connected to a fixed frame (2). The top of the inner wall of the fixed frame (2) is rotatably connected to a gear (3). Both sides of the top of the inner wall of the fixed frame (2) are provided with sliding grooves, and a drive frame (4) is slidably connected inside the sliding grooves. Teeth (5) are fixedly connected to the surface of the drive frame (4). There are several teeth (5). The teeth (5) mesh with the gear (3), and the two drive frames (4) are axially symmetrically distributed. Limiting plates (6) are slidably connected to the front and rear sides of the top of the printing press cardboard placement table (1). The limiting plates (6) are fixedly connected to the drive frames (4). The drive frame (4) on the front is provided with a slot (7) on the right side. There are several slots (7) and they are evenly distributed on the right side of the drive frame (4). The locking frame (8) is slidably connected inside the fixed frame (2). The locking frame (8) is inserted into the slot (7). The right side of the inner wall of the fixed frame (2) is fixedly connected with a compression spring (9). The other end of the compression spring (9) is fixedly connected to the locking frame (8). The right side of the locking frame (8) extends to the right side of the fixed frame (2) and is fixedly connected with a handle (10). The front of the drive frame (4) is fixedly connected with a handle (15).

2. The adjustable limiting mechanism for a cardboard printing machine according to claim 1, characterized in that: The surface of the limiting plate (6) is provided with a sliding groove, and there are several sliding grooves. The sliding grooves are evenly distributed on the surface of the limiting plate (6). The sliding groove is slidably connected to a movable column (11), and a baffle (12) is fixedly connected to the top of the movable column (11).

3. The adjustable limiting mechanism for a cardboard printing machine according to claim 2, characterized in that: An electric cylinder (14) is fixedly connected to the surface of the limiting plate (6), and a fixing block (13) is fixedly connected to the surface of the baffle (12). The output end of the electric cylinder (14) is fixedly connected to the fixing block (13).

4. The adjustable limiting mechanism for a cardboard printing machine according to claim 1, characterized in that: The top of the printing press cardboard placement table (1) is provided with anti-slip grooves (16), and there are several anti-slip grooves (16), which are evenly distributed on the top of the printing press cardboard placement table (1).

5. The adjustable limiting mechanism for a cardboard printing machine according to claim 4, characterized in that: A positioning rod (17) is inserted into the inside of the anti-slip groove (16), and a pull ring (18) is fixedly connected to the top of the positioning rod (17).

6. The adjustable limiting mechanism for a cardboard printing machine according to claim 1, characterized in that: The fixed frame (2) is internally fixedly connected to a bearing, and the outer ring of the bearing is fixedly connected to the fixed frame (2), and the inner ring of the bearing is fixedly connected to the gear (3). The surface of the compression spring (9) is sprayed with anti-rust paint.

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