A paper feeding mechanism for a suturing machine

Abstract

The utility model provides a paper feeding mechanism for sewing machine belongs to printing equipment technical field. It solved the problem that the existing sewing machine's conveying mechanism can cause paper disorder easily. The utility model discloses two sets of conveying components correspondingly set up up and down, and form a paper feeding channel between two sets of conveying components. The conveying component includes at least two pulleys and the synchronous belt of closed around the pulley, and the synchronous belt has the uplink portion and the downlink portion. The conveying component through a elastic compression mechanism can be relative to the elastic lifting of below conveying component, so that the downlink portion of above synchronous belt will be papered in the paper feeding channel elastic compression on the uplink portion of below synchronous belt, and keeps the compression state in the conveying process. The utility model's advantage lies in adopting the scheme of two sets of synchronous belt sandwiching paper, makes paper be firmly clamped between the up and down synchronous belt, greatly improves the conveying stability, ensures the sewing precision.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment technology, and in particular to a paper feeding mechanism for a sewing machine. Background Technology

[0002] Sewn notebooks are made by sewing neatly stacked sheets of paper together using a sewing machine. Existing sewing machines typically include a frame, a sewing head mounted on the frame (for performing the sewing action), and a paper conveying mechanism. The working principle of this conveying mechanism is largely similar to that of a sewing machine, employing a friction-driven "top-press, bottom-drag" method. However, this conveying method has significant drawbacks in practical applications: because sewn notebooks are composed of multiple sheets of paper stacked together, their surfaces are not perfectly flat, and the coefficients of friction may differ in different areas. During conveying, uneven pressure or insufficient friction applied by the upper and lower conveyor components can easily cause the notebooks to become misaligned, tilted, or even jammed within the conveying channel. This not only affects the accuracy of the sewing position, leading to decreased product quality and defective products, but also interrupts the production process and reduces production efficiency. Summary of the Invention

[0003] The main purpose of this invention is to address the problem that existing sewing machine feeding mechanisms are prone to paper misalignment, and to provide a sewing machine paper feeding mechanism that offers stable feeding, good synchronization, and effectively prevents paper displacement.

[0004] The objective of this utility model can be achieved through the following technical solutions: A paper feeding mechanism for a sewing machine is mounted on the machine frame and includes two sets of conveying components arranged vertically and vertically, forming a paper feeding channel between the two sets of conveying components. Each conveying component includes at least two pulleys and a synchronous belt closedly wound around the pulleys. The synchronous belt has an upper portion and a lower portion. The lower portion of the upper synchronous belt is opposite to the upper portion of the lower synchronous belt, and the gap between them constitutes the paper feeding channel. The feature is that the lower conveying component is fixedly mounted on the frame, and the upper conveying component can be elastically raised and lowered relative to the lower conveying component through an elastic pressing mechanism, so that the downward part of the upper synchronous belt elastically presses the paper in the paper feeding channel onto the upward part of the lower synchronous belt and maintains the pressed state during the conveying process; the paper feeding mechanism also includes a motor, which serves as a power source to drive the sewing machine head to realize the sewing action. The motor is also connected to the upper and lower conveying components through a transmission component to drive the two sets of conveying components to perform synchronous intermittent conveying.

[0005] In the aforementioned paper feeding mechanism for a sewing machine, the elastic clamping mechanism includes a fixed plate, a mounting plate, a guide rod, and a spring. Each pulley of the upper conveying assembly is rotatably mounted on the mounting plate. The lower end of the guide rod is fixedly connected to the mounting plate, and the upper end passes through a guide hole opened on the fixed plate and can slide up and down along the guide hole. The spring is sleeved on the guide rod, and its two ends abut against the fixed plate and the mounting plate respectively, providing a continuous downward elastic clamping force for the mounting plate and the upper conveying assembly.

[0006] In the aforementioned paper feeding mechanism for a sewing machine, the elastic clamping mechanism further includes a limiting screw and a top plate. The top plate is fixed to the top of the guide rod, and the limiting screw is threaded onto the top plate. Its lower end can abut against the upper surface of the fixed plate. By rotating the limiting screw, the height of its lower end relative to the fixed plate can be adjusted, thereby limiting the lower limit position of the mounting plate and the downward portion of the timing belt above it.

[0007] In the paper feeding mechanism for a sewing machine described above, there are two guide rods, which are spaced apart on the left and right. After passing through the guide hole, both guide rods are fixed to the top plate, and a limiting screw is located between the two guide rods. There are two springs, which are respectively sleeved on the two guide rods.

[0008] In the aforementioned paper feeding mechanism for a sewing machine, each conveying assembly includes two synchronous belts arranged symmetrically on the left and right sides. The sewing machine head is positioned above the paper feeding channel and between the two synchronous belts. The symmetrical synchronous belt layout provides ample working space for the sewing machine head, resulting in a compact and reasonable structure.

[0009] In the paper feeding mechanism for a sewing machine described above, the mounting plate includes a horizontal plate and two side plates. The two side plates are fixed at both ends of the horizontal plate, the guide rod is fixed to the horizontal plate, and the two synchronous belts of the upper conveying assembly are respectively set on the two side plates.

[0010] In the paper feeding mechanism for a sewing machine described above, the transmission assembly includes a movable wheel, a fixed wheel, and a transmission belt. The movable wheel is coaxially fixed to a pulley on the upper conveying assembly. The fixed wheel is rotatably mounted on a fixed plate. The transmission belt is closed and wound around the movable wheel and the fixed wheel. A support wheel is also provided on the top plate. The support wheel is elastically pressed against the transmission belt to maintain its tension. The transmission assembly further includes a first transmission wheel, a second transmission wheel, and a second transmission belt. The first transmission wheel is connected to a fixed wheel via a universal coupling. The second transmission wheel is coaxially fixed to a pulley on the lower conveying assembly via a transmission shaft. The second transmission belt is closedly wound around the first and second transmission wheels. The motor is connected to either drive wheel one or drive wheel two.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model abandons the traditional friction conveying method and innovatively adopts a paper-feeding scheme using two sets of synchronous belts. Through an elastic clamping mechanism, the upper synchronous belt can adapt to notebooks of different thicknesses and apply continuous and uniform clamping force, so that the paper is firmly clamped between the upper and lower synchronous belts. This "clamping" method fundamentally avoids the paper shifting, tilting or becoming disordered during the conveying process due to uneven pressure or insufficient friction, greatly improving the conveying stability and ensuring the stitching accuracy; 2. The conveying and sewing actions are driven by the same motor, and the power is distributed to the upper and lower conveying components through a transmission assembly. This design ensures that the intermittent paper feeding and the upper and lower sewing actions of the machine head are strictly synchronized in timing. The conveying components are driven by the motor when paper feeding is needed and stop when sewing, ensuring the accuracy of the position of each sewing point and eliminating quality problems caused by asynchronous driving sources from the power source. 3. By rotating the limiting screw, the lower limit position of the upper synchronous belt can be precisely set, thereby controlling the minimum clamping gap on the paper and preventing excessive compression and damage to thicker books. Simultaneously, the preload of the spring can be selected or adjusted as needed to achieve the best clamping effect. This adjustability allows the equipment to better adapt to different production requirements. 4. The transmission and conveying are achieved using toothed synchronous belts and pulleys, unlike traditional pure friction transmission. This meshing transmission method completely eliminates slippage between the conveyor belt and the drive wheel, ensuring precise control of the conveying length and further improving the positional accuracy of paper feeding and sewing. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the paper feeding mechanism of this utility model installed on the frame of a sewing machine; Figure 2 This is a schematic diagram of the two sets of conveying components and the transmission components of this utility model; Figure 3 This is a schematic diagram of the structure of the upper conveying component of this utility model; Figure 4 This is a schematic diagram of the elastic clamping mechanism of this utility model; In the diagram, 1. Frame; 2. Pulley; 3. Synchronous belt; 4. Motor; 5. Fixed plate; 6. Guide rod; 7. Spring; 8. Limit screw; 9. Top plate; 10. Horizontal plate; 11. Side plate; 12. Movable wheel; 13. Fixed wheel; 14. Drive belt one; 15. Guide wheel; 16. Universal coupling; 17. Drive wheel one; 18. Drive wheel two; 19. Drive belt two; 20. Drive shaft. Detailed Implementation

[0013] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0014] like Figure 1 and Figure 2 As shown, the paper feeding mechanism of this utility model includes two sets of conveying components arranged vertically and vertically. The lower conveying component is directly fixed to the frame 1 of the sewing machine via a bracket, forming a fixed reference. The upper conveying component is suspended by an elastic clamping mechanism, allowing it to elastically rise and fall relative to the lower conveying component.

[0015] Each conveyor assembly includes two symmetrically arranged synchronous belts 3. Each synchronous belt 3 is tensioned and driven by at least two pulleys 2, forming a closed loop. The synchronous belt 3 has an upper section and a lower section. The lower section of the upper synchronous belt 3 is opposite to the upper section of the lower synchronous belt 3, and the gap between them forms a paper feeding channel for conveying the sewing machine paper. The sewing machine head is positioned above the paper feeding channel and in the gap between the two synchronous belts 3, thus avoiding interference with the conveying mechanism.

[0016] like Figure 4 As shown, the elastic pressing mechanism includes a fixed plate 5, a mounting plate, guide rods 6, springs 7, a top plate 9, and a limiting screw 8. The fixed plate 5 is fixedly mounted on the frame 1, serving as the fixed foundation for the entire elastic pressing mechanism. The mounting plate is used to support the upper conveying assembly. In this embodiment, the mounting plate consists of a horizontal plate 10 and two side plates 11 fixed at both ends of the horizontal plate 10. The pulley 2 of the upper conveying assembly is rotatably mounted on the two side plates 11. Two guide rods 6 are spaced apart on the left and right, and their lower ends are fixedly connected to the horizontal plate 10. The upper ends of the guide rods 6 pass through two corresponding guide holes on the fixed plate 5 and can slide up and down along the guide holes. Two springs 7 are respectively sleeved on the two guide rods 6, and their two ends are pressed against the lower surface of the fixed plate 5 and the upper surface of the horizontal plate 10, respectively. The preload of the springs 7 continuously pushes the mounting plate and the entire upper conveying assembly downward, so that the downward part of the upper synchronous belt 3 can elastically press against the paper in the paper feeding channel. The top ends of the two guide rods 6 are jointly fixed to a top plate 9. A limiting screw 8 is threadedly connected to the center of the top plate 9. By rotating the limiting screw 8, the length of its lower end extending out of the top plate 9 can be adjusted. When the upper conveyor assembly descends, the lower end of the limiting screw 8 will abut against the upper surface of the fixed plate 5, thereby limiting the further descent of the mounting plate and setting the lowest position of the downward section of the upper synchronous belt 3 to prevent excessively thick books from being over-compressed.

[0017] The paper feeding mechanism also includes a motor 4, which serves as the main drive source. On one hand, it drives the sewing machine head to reciprocate up and down for sewing; on the other hand, it provides power to the conveying components, which are then synchronously transmitted to the upper and lower conveying components via a transmission assembly. Figure 4 As shown, the transmission assembly includes a movable wheel 12, a fixed wheel 13, and a transmission belt 14. The movable wheel 12 is coaxially fixed to a pulley 2 on the upper conveying assembly. The fixed wheel 13 is rotatably mounted on the fixed plate 5. The transmission belt 14 is closedly wound around the movable wheel 12 and the fixed wheel 13. A support wheel 15 is also provided on the top plate 9. This support wheel 15 is always elastically pressed against the transmission belt 14 to compensate for the center distance change caused by the lifting and lowering of the upper mounting plate, ensuring that the transmission belt 14 is always taut. Figure 3 As shown, the transmission assembly further includes a first transmission wheel 17, a second transmission wheel 18, and a second transmission belt 19. The first transmission wheel 17 is connected to a fixed wheel 13 via a universal coupling 16. The second transmission wheel 18 is coaxially fixed to a pulley 2 on the lower conveying assembly via a transmission shaft 20. The second transmission belt 19 is closedly wound around the first transmission wheel 17 and the second transmission wheel 18. The output power of the motor 4 is transmitted to either the first transmission wheel 17 or the second transmission wheel 18 through one or more sets of belts, gears, sprockets, or other transmission methods.

[0018] The working process of this utility model is as follows: The folded sewing paper enters the paper feeding channel. Under the action of spring 7, the downward section of the synchronous belt 3 of the upper conveyor component automatically presses down, firmly pressing the paper onto the upward section of the synchronous belt 3 below. Motor 4 starts, driving transmission wheel 17 to rotate. The power is divided into two paths: one path drives transmission wheel 18 and the lower conveyor component through transmission belt 19; the other path drives the fixed wheel 13 through universal coupling 16, and then drives the movable wheel 12 and the upper conveyor component through transmission belt 14. At this point, the upper and lower conveyor components are driven synchronously. While conveying, motor 4 drives the sewing head to perform the sewing.

[0019] It should be understood that in the claims and description of this utility model, all instances of "comprising..." should be understood as having an open meaning, that is, their meaning is equivalent to "containing at least...", and should not be understood as having a closed meaning, that is, their meaning should not be understood as "containing only...".

[0020] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A paper feeding mechanism for a sewing machine, disposed on the frame (1) of the sewing machine, comprising two sets of conveying components arranged vertically and vertically, forming a paper feeding channel between the two sets of conveying components; the conveying components include at least two pulleys (2) and a synchronous belt (3) closedly wound around the pulleys (2), the synchronous belt (3) having an upper part and a lower part; the lower part of the upper synchronous belt (3) is opposite to the upper part of the lower synchronous belt (3), and the gap between the two constitutes the paper feeding channel; Its features are, The lower conveying component is fixedly mounted on the frame (1). The upper conveying component can be elastically raised and lowered relative to the lower conveying component through an elastic pressing mechanism, so that the downward part of the upper synchronous belt (3) elastically presses the paper in the paper feeding channel onto the upward part of the lower synchronous belt (3) and maintains the pressing state during the conveying process. The paper feeding mechanism also includes a motor (4), which serves as a power source to drive the sewing machine head to perform sewing action. The motor (4) is also connected to the upper and lower conveying components through a transmission component to drive the two sets of conveying components to perform synchronous intermittent conveying.

2. The paper feeding mechanism for a sewing machine according to claim 1, characterized in that, The elastic clamping mechanism includes a fixed plate (5), a mounting plate, a guide rod (6), and a spring (7). Each pulley (2) of the upper conveying component is rotatably mounted on the mounting plate. The lower end of the guide rod (6) is fixedly connected to the mounting plate, and the upper end passes through the guide hole opened on the fixed plate (5) and can slide up and down along the guide hole. The spring (7) is sleeved on the guide rod (6), and its two ends abut against the fixed plate (5) and the mounting plate respectively, providing a continuous downward elastic clamping force for the mounting plate and the upper conveying component.

3. The paper feeding mechanism for a sewing machine according to claim 2, characterized in that, The elastic clamping mechanism also includes a limiting screw (8) and a top plate (9). The top plate (9) is fixed to the top of the guide rod (6), and the limiting screw (8) is threaded onto the top plate (9). Its lower end can abut against the upper surface of the fixed plate (5). By rotating the limiting screw (8), the height of its lower end relative to the fixed plate (5) is adjusted, thereby limiting the lower limit position of the mounting plate and the downward part of the synchronous belt (3) above.

4. The paper feeding mechanism for a sewing machine according to claim 3, characterized in that, There are two guide rods (6), which are spaced apart on the left and right. After passing through the guide hole, both guide rods (6) are fixed to the top plate (9). The limiting screw (8) is located between the two guide rods (6). There are two springs (7), which are respectively sleeved on the two guide rods (6).

5. A paper feeding mechanism for a sewing machine according to claim 2, characterized in that, Each conveyor assembly includes two synchronous belts (3) arranged symmetrically on the left and right sides. The sewing machine head is located above the paper feeding channel and between the two synchronous belts (3).

6. A paper feeding mechanism for a sewing machine according to claim 5, characterized in that, The mounting plate includes a horizontal plate (10) and two side plates (11). The two side plates (11) are fixed at both ends of the horizontal plate (10). The guide rod (6) is fixed to the horizontal plate (10). The two synchronous belts (3) of the upper conveying component are respectively set on the two side plates (11).

7. A paper feeding mechanism for a sewing machine according to claim 1, characterized in that, The transmission assembly includes a movable wheel (12), a fixed wheel (13), and a transmission belt (14); the movable wheel (12) is coaxially fixed to a pulley (2) on the upper conveying assembly, the fixed wheel (13) is rotatably mounted on the fixed plate (5), and the transmission belt (14) is closedly wound around the movable wheel (12) and the fixed wheel (13). A support wheel (15) is also provided on the top plate (9), which elastically presses against the transmission belt (14) to maintain its tension. The transmission assembly further includes a first transmission wheel (17), a second transmission wheel (18), and a second transmission belt (19). The first transmission wheel (17) is connected to a fixed wheel (13) via a universal coupling (16). The second transmission wheel (18) is coaxially fixed to a pulley (2) on the lower conveying assembly via a transmission shaft (20). The second transmission belt (19) is closed and wound around the first transmission wheel (17) and the second transmission wheel (18). The motor (4) is connected to the first transmission wheel (17) or the second transmission wheel (18) for transmission.

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