A paper conveying section with convenient pressure adjustment

Abstract

This invention relates to the field of paper conveying equipment technology, specifically to a paper conveying unit with convenient pressure adjustment. It includes an upper belt mounted on the upper part of the frame and a lower belt mounted on the lower part of the frame. The upper belt houses several fixed rollers, and the lower belt houses several pressure adjusting rollers. The unit also includes a lower belt power transmission chain; a roller adjusting assembly; a lower roller pneumatic tightening device; a lower roller manual tightening device; and a lower belt tightening device. In this convenient pressure-adjustable paper conveying unit, the lower belt power transmission chain drives the upper and lower belt rollers, eliminating the need for complex chain winding. Furthermore, when the upper belt moves back and forth, the upper and lower belt rollers move simultaneously without affecting the chain length, achieving simultaneous power to both the upper and lower belts. The upper belt can move freely back and forth, and the roller adjusting assembly connects all the pressure adjusting rollers to tension springs.

Description

Technical Field

[0001] This invention relates to the field of paper conveying equipment technology, and more specifically, to a paper conveying unit with convenient pressure adjustment. Background Technology

[0002] In paper processing, paper conveying equipment is generally used for paper feeding. Most paper feeding units have a similar structure: the lower belt is powered, while the upper belt is passive and not powered. The rotation of the lower belt is caused by the friction between the paper and the belts, which drives the upper belt to rotate (see...). Figure 1 This has drawbacks, negatively impacting the paper in the middle. Since the conveyor belt's power is transmitted through the middle paper, it can damage the paper surface, potentially causing the outer layer to "prick."

[0003] There are generally two ways to drive an upper belt: one is to add a motor to the upper belt, just like the one used for the lower belt (see...). Figure 2 This structure is complex and expensive. Another method uses the power from the lower belt, which is transmitted to the upper belt via a chain and a reverse gear. The power transmission chain repeatedly winds around the machine's wall panel, making the structure quite complex, and the upper belt cannot move freely back and forth (see...). Figure 3 This makes adjusting the size of the paper boxes or sheets that need to be pressed and fed inconvenient, resulting in a suboptimal structure. Furthermore, the conveyor belt pressure typically uses tension springs to tighten the rollers on the upper and lower belts, with one spring fixed to each belt, so that the paper boxes and sheets are compressed as they pass over the belt and rollers. A single unpowered roller requires two sets of springs and an adjusting handwheel; a single conveyor unit requires at least 20-28 sets of springs and adjusting handwheels (see...). Figure 4 Adjusting the belt pressure requires turning the 20-28 adjustment handwheel, which is cumbersome and results in uneven pressure. Furthermore, replacing the spring and adjustment handwheel with a cylinder creates a so-called pneumatic pressure table (see...). Figure 3 This has two advantages: firstly, pressure adjustment is convenient and can be done in one step; secondly, the pressure is uniform. However, the cost is high, with each pressurizing unit requiring 20-28 cylinders, and the air pipe layout is complex and takes up space, resulting in a high failure rate. Summary of the Invention

[0004] The purpose of this invention is to provide a paper conveying unit with convenient pressure adjustment to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides a paper conveying unit with convenient pressure adjustment, comprising an upper belt mounted on the upper part of the frame and a lower belt mounted on the lower part of the frame. The upper belt has a plurality of fixed rollers installed inside, and the lower belt has a plurality of pressure adjusting rollers installed inside. The unit also includes a lower belt power transmission chain for driving the upper and lower belt rollers; a roller adjusting assembly for driving the pressure adjusting rollers to move synchronously; a lower roller pneumatic tightening device for automatically controlling the movement of the pressure adjusting rollers through the roller adjusting assembly; a lower roller manual tightening device for manually controlling the movement of the pressure adjusting rollers through the roller adjusting assembly; and a lower belt tightening device for controlling the tightening of the lower belt.

[0006] Preferably, two sets of auxiliary paper pressing devices are installed at one end of the upper belt, and the auxiliary paper pressing devices are connected to the end roller of the upper belt through a chain and a sprocket.

[0007] Preferably, a main motor for the pressing table is installed on the inner bottom side of the frame, and the output shaft of the main motor for the pressing table is driven by a lower belt via a drive chain.

[0008] Preferably, a movable row is installed on the outer side of the upper belt.

[0009] Preferably, the lower belt power transmission chain has a lower belt roller and an upper belt roller connected at both ends by sprockets, and the lower belt roller is installed at one end of the lower belt.

[0010] Preferably, the end of the lower belt is tensioned by a tension adjustment cylinder, and guide plates are provided at both ends of the tension adjustment cylinder.

[0011] Preferably, the roller adjusting assembly includes a connecting rod on which several tension springs are mounted. The bottom end of each tension spring is connected to the end of the pressure adjusting roller via an L-shaped connecting rod, and the middle part of the L-shaped connecting rod is rotatably connected to the movable row via a rotating shaft.

[0012] Preferably, the lower roller pneumatic tightening device includes a cylinder, the bottom of which is mounted on the frame, and a connecting plate is mounted on the output shaft of the cylinder. The surface of the connecting plate is provided with connecting holes, and the connecting plate is connected to the connecting rod by bolts.

[0013] Preferably, the manual tightening device for the lower roller includes a first threaded rod, one end of which is provided with a connecting end, which is connected to a connecting rod by bolts, and the other end of the first threaded rod is threadedly connected with a first handle, which is mounted on the outer wall of the frame through a bearing seat.

[0014] Preferably, the lower belt tensioning device includes a second threaded rod, one end of which is connected to a tension adjusting cylinder via a tension spring, and the other end of which is threadedly connected to a second handle, which is mounted on the outer wall of the frame via a second bearing seat.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this paper conveying section with convenient pressure adjustment, the upper belt roller and the lower belt roller are driven by the lower belt power transmission chain. The chain does not need to be complicated to wind. Moreover, when the upper belt moves back and forth, the upper and lower belt rollers and the upper belt roller move at the same time without affecting the chain length. This achieves the purpose of both the upper and lower belts having power at the same time, and the upper belt can move back and forth at will.

[0016] 2. In this paper conveying unit with convenient pressure adjustment, all pressure adjusting rollers are connected to tension springs through roller adjustment components. By simply adjusting and pulling the left and right connecting rods, all pressure adjusting rollers can be driven, thereby achieving the purpose of adjusting belt pressure. In addition, two sets of pneumatic tightening devices for the lower rollers are used on the left and right sides. Adjusting the air source pressure achieves the purpose of adjusting belt pressure. The manual tightening device for the lower rollers can also achieve manual adjustment, thus ensuring that adjustment can be performed manually or pneumatically.

[0017] 3. In this paper conveying section with convenient pressure adjustment, an auxiliary paper pressing device is added to the front end of the conveying section. This device flattens the folded paper box before it is fed into the conveyor belt, without changing its original shape, thus achieving a smooth transition. The device uses power transmission from the conveyor belt, so the belt speed of the auxiliary paper pressing device is synchronized with the belt speed of the conveying section. In addition, the belts of the two sets of auxiliary paper pressing devices can move freely left and right, and can be moved to the left or right side when not in use, without affecting normal operation.

[0018] 4. In this paper conveying section with convenient pressure adjustment, the lower belt can be further tightened by the lower belt tightening device to ensure stable paper compression. Attached Figure Description

[0019] Figure 1 This is one of the schematic diagrams of existing technology structures; Figure 2 This is the second schematic diagram of the existing technology structure; Figure 3 This is the third schematic diagram of the existing technology structure; Figure 4 This is the fourth schematic diagram of the existing technology structure; Figure 5 This is a schematic diagram of the overall structure of the present invention; Figure 6 This is a side view of the present invention; Figure 7This is a partial structural schematic diagram of the present invention; Figure 8 This is a schematic diagram of the pneumatic tightening device for the lower roller in this invention; Figure 9 This is a schematic diagram of the lower roller manual tightening device in this invention; Figure 10 This is a schematic diagram of the lower roller manual tightening device in this invention.

[0020] The meanings of the labels in the diagram are as follows: 1. Frame; 2. Lower belt; 3. Upper belt; 31. Moving row; 4. Lower belt power transmission chain; 41. Sprocket; 42. Lower belt roller; 43. Guide plate; 44. Tension adjusting cylinder; 45. Upper belt roller; 5. Roller adjusting assembly; 51. Connecting rod; 52. Tension spring; 53. L-shaped connecting rod; 6. Pressure adjusting roller; 61. Fixed roller; 7. Auxiliary paper pressing device; 8. Press table main motor; 81. Drive chain; 9. Lower roller pneumatic tensioning device; 91. Cylinder; 92. Output shaft; 93. Connecting plate; 931. Connecting hole; 10. Lower roller manual tensioning device; 101. First threaded rod; 1011. Connecting end; 102. First handle; 103. First bearing seat; 11. Lower belt tensioning device; 111. Second threaded rod; 112. Tension spring; 113. Second handle; 114. Second bearing seat. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] This invention provides a paper transport unit with convenient pressure adjustment, such as... Figures 1-10As shown, it includes an upper belt 3 installed on the upper part of the frame 1 and a lower belt 2 installed on the lower part of the frame. The upper belt 3 has several fixed rollers 61 installed inside, and the lower belt 2 has several pressure adjusting rollers 6 installed inside. It also includes a lower belt power transmission chain 4 for driving the upper belt rollers and the lower belt rollers to move; and a roller adjusting assembly 5 for driving the several pressure adjusting rollers 6 to move synchronously. The lower roller pneumatic tensioning device 9 is used to automatically control the movement of the pressure regulating roller 6 through the roller adjustment assembly 5; the lower roller manual tensioning device 10 is used to manually control the movement of the pressure regulating roller 6 through the roller adjustment assembly 5; and the lower belt tensioning device 11 is used to control the tensioning of the lower belt 2.

[0024] In this embodiment, two sets of auxiliary paper pressing devices 7 are installed at one end of the upper belt 3. The auxiliary paper pressing device 7 is connected to the end roller of the upper belt 3 through a chain and sprocket. The auxiliary paper pressing device 7 consists of several rollers and belts. The belt moves synchronously with the upper belt 3. The belt presses the paper that is fed in. The folded paper box is first fed into the belt of the auxiliary paper pressing device 7, and then enters between the upper belt 3 and the lower belt 2, which plays a role in pre-flattening and will not change its original shape, thus achieving a smooth transition.

[0025] Specifically, a main press motor 8 is installed on the bottom inner side of the frame 1. The output shaft of the main press motor 8 drives the lower belt 2 through the drive chain 81 to ensure the power input of the lower belt 2.

[0026] Furthermore, a movable row 31 is installed on the outer side of the upper belt 3 to fix and protect the outer side of the upper belt 3, and to drive the upper belt 3 to move.

[0027] Furthermore, the lower belt power transmission chain 4 has a lower belt roller 42 and an upper belt roller 45 connected at both ends by a sprocket 41. The lower belt roller 42 is installed at one end of the lower belt 2.

[0028] Furthermore, the tension of the lower belt 2 is adjusted by the tension adjusting cylinder 44, and guide plates 43 are provided at both ends of the tension adjusting cylinder 44.

[0029] In Example 2, to further facilitate the adjustment of the pressure regulating roller 6, based on Example 1, the roller adjusting assembly 5 includes a connecting rod 51, on which several tension springs 52 are installed. The bottom end of the tension spring 52 is connected to the end of the pressure regulating roller 6 through an L-shaped connecting rod 53. The middle part of the L-shaped connecting rod 53 is rotatably connected to the moving block 31 through a rotating shaft. The horizontal movement of the connecting rod 51 drives the tension springs 52 to pull, thereby causing the L-shaped connecting rod 53 to move, causing the pressure regulating roller 6 to move upward, thus achieving the tightening of the lower belt 2.

[0030] In Example 3, to further improve the electrical adjustment of the pressure regulating roller 6, based on Example 2, the lower roller pneumatic tightening device 9 includes a cylinder 91. The bottom of the cylinder 91 is mounted on the frame 1. The output shaft 92 of the cylinder 91 is equipped with a connecting plate 93. The surface of the connecting plate 93 is provided with a connecting hole 931. The connecting plate 93 is connected to the connecting rod 51 by bolts. The cylinder 91 drives the connecting plate 93 to move, which in turn drives the connecting rod 51 to move, thereby realizing the electrical control of the pressure regulating roller 6.

[0031] In Example 4, to further improve the manual adjustment effect of the pressure regulating roller 6, based on Example 3, the lower roller manual tightening device 10 includes a first threaded rod 101. One end of the first threaded rod 101 is provided with a connecting end 1011, which is connected to the connecting rod 51 by bolts. The other end of the first threaded rod 101 is threadedly connected to a first handle 102. The first handle 102 is installed on the outer wall of the frame 1 through a first bearing seat 103. By turning the first handle 102, the first threaded rod 101 can be driven to move horizontally, thereby pulling the connecting rod 51 to realize the manual adjustment of the pressure regulating roller 6.

[0032] Furthermore, the lower belt tensioning device 11 includes a second threaded rod 111. One end of the second threaded rod 111 is connected to the tension adjusting cylinder 44 via a tension spring 112. The other end of the second threaded rod 111 is threadedly connected to a second handle 113. The second handle 113 is mounted on the outer wall of the frame 1 via a second bearing seat 114. By turning the second handle 113, the tension adjusting cylinder 44 can be moved horizontally, thereby allowing the lower belt 2 to be tensioned.

[0033] When using the paper conveying unit of the present invention with convenient pressure adjustment, the paper is first fed into the device from one end and enters between the upper belt 3 and the lower belt 2 through the auxiliary paper pressing device 7. The auxiliary paper pressing device 7 plays a pre-flattening role without changing its original shape, achieving a smooth transition. The paper is pressed and conveyed by the upper belt 3 and the lower belt 2. When the paper pressing needs to be adjusted, the cylinder 91 drives the connecting plate 93 to move, which in turn drives the connecting rod 51 to move. The horizontal movement of the connecting rod 51 drives the tension spring 52 to pull, which in turn causes the L-shaped connecting rod 53 to move, causing the force adjusting roller 6 to move upward, thereby pressing the lower belt 2. Alternatively, the first threaded rod 101 can be moved horizontally by turning the first handle 102, thereby pulling the connecting rod 51 to achieve manual adjustment of the lower belt 2. The lower belt drive chain 4 drives the lower belt roller 42 and the upper belt roller 45. The chain does not require complex winding, and the upper and lower belt rollers move simultaneously when the upper belt moves back and forth, without affecting the chain length. This achieves the goal of simultaneous power to both the upper and lower belts. Furthermore, the upper belt can move freely back and forth. This novel pressure conveying unit is suitable for various equipment requiring pressure and conveying, such as box gluing machines, carton gluing machines, paper mounting machines, glue box machines, window pasting machines, bag making machines, etc. It has a reasonable structure, low cost, and wide range of applications.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A paper conveying unit with convenient pressure adjustment, comprising an upper belt (3) installed on the upper part of a frame (1) and a lower belt (2) installed on the lower part of the frame, wherein a plurality of fixed rollers (61) are installed inside the upper belt (3) and a plurality of pressure adjusting rollers (6) are installed inside the lower belt (2), characterized in that: Also includes The lower belt power transmission chain (4) is used to drive the upper belt roller and the lower belt roller to move; The roller adjustment assembly (5) is used to drive several pressure adjustment rollers (6) to move synchronously; The lower roller pneumatic tightening device (9) is used to automatically control the movement of the pressure regulating roller (6) through the roller adjusting assembly (5); The lower roller manual tightening device (10) is used to manually control the movement of the pressure regulating roller (6) through the roller adjusting assembly (5); The lower belt tensioning device (11) is used to control the tensioning of the lower belt (2); The lower belt power transmission chain (4) has a lower belt roller (42) and an upper belt roller (45) connected at both ends by sprockets (41). The lower belt roller (42) is installed at one end of the lower belt (2). The roller adjustment assembly (5) includes a connecting rod (51), on which several tension springs (52) are installed. The bottom end of the tension springs (52) is connected to the end of the pressure adjustment roller (6) through an L-shaped connecting rod (53), and the middle part of the L-shaped connecting rod (53) is rotatably connected to the moving row (31) through a rotating shaft. The lower roller pneumatic tightening device (9) includes a cylinder (91), the bottom of which is mounted on the frame (1), and a connecting plate (93) is mounted on the output shaft (92) of the cylinder (91). A connecting hole (931) is provided on the surface of the connecting plate (93), and the connecting plate (93) is connected to the connecting rod (51) by bolts. The manual tightening device (10) for the lower roller includes a first threaded rod (101), one end of which is provided with a connecting end (1011), the connecting end (1011) and the connecting rod (51) are connected by bolts, and the other end of the first threaded rod (101) is threadedly connected with a first handle (102), the first handle (102) is installed on the outer wall of the frame (1) through a first bearing seat (103); The lower belt tightening device (11) includes a second threaded rod (111), one end of which is connected to the tension adjusting cylinder (44) via a tension spring (112), and the other end of which is threadedly connected to a second handle (113). The second handle (113) is mounted on the outer wall of the frame (1) via a second bearing seat (114).

2. The paper conveying unit with convenient pressure adjustment according to claim 1, characterized in that: Two sets of auxiliary paper pressing devices (7) are installed at one end of the upper belt (3). The auxiliary paper pressing devices (7) are connected to the end roller of the upper belt (3) through a chain and a sprocket.

3. The paper conveying unit with convenient pressure adjustment according to claim 1, characterized in that: The bottom inner side of the frame (1) is equipped with a press table main motor (8), and the output shaft of the press table main motor (8) drives the lower belt (2) through the active chain (81).

4. The paper conveying unit with convenient pressure adjustment according to claim 1, characterized in that: A movable row (31) is installed on the outside of the upper belt (3).

5. The paper conveying unit with convenient pressure adjustment according to claim 1, characterized in that: The end of the lower belt (2) is tensioned by a tension adjusting cylinder (44), and guide plates (43) are provided at both ends of the tension adjusting cylinder (44).

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