Bone strip tension and speed adjustment device for self-sealing bag
By using the tension and speed adjustment device of the self-sealing bag's rib strips, and through the linkage of the speed adjustment module and the tension adjustment module, precise control of the rib strip speed and tension is achieved, solving the problem of insufficient alignment accuracy between the rib strips and the bag body in traditional self-sealing bag sewing machines, and improving the sewing quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN KEHUI PLASTIC TECH CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-06-16
Smart Images
Figure CN224362235U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of self-sealing bag production equipment, and in particular to a self-sealing bag rib tension and speed adjustment device. Background Technology
[0002] A self-sealing bag sewing machine is a device that sews a bag body and a zipper (also known as a self-sealing zipper) together. The bag body holds the contents, while the zipper is positioned at the bag's entrance and uses concave and convex strips to create a locking seal, thus enabling the self-sealing function of the bag. During operation, the bag body and zipper enter the sewing machine from their respective feeding mechanisms, are aligned, and then sewn together (e.g., ultrasonic welding). Generally, to move the bag body and zipper forward, a drive roller is usually installed after the sewing station to propel them synchronously.
[0003] The shortcomings of traditional self-sealing bag sewing machines are as follows: the reinforcing strips are conveyed in the form of a material belt, the transmission distance between the reinforcing strips and the drive rollers is very long, and the reinforcing strips need to pass through various guiding or detection mechanisms. Therefore, it is difficult to control the speed and tension of the reinforcing strips before they reach the alignment process. If the speed and tension of the reinforcing strips are not properly controlled, the alignment accuracy between the reinforcing strips and the bag body will decrease (for example, the reinforcing strips are too tight or too loose, or they are not matched with the forward speed of the bag body), resulting in wrinkles at the seam between the reinforcing strips and the bag body during sewing.
[0004] Therefore, it is necessary to design an auxiliary feeding device that can adjust the speed and tension of the bone strips before they reach the alignment process to address the above problems. Utility Model Content
[0005] Based on this, the present invention provides a tension and speed adjustment device for the reinforcing strip of a self-sealing bag. The speed adjustment module provides auxiliary power for the conveying of the material belt, thereby adjusting the forward speed of the material belt. At the same time, the tension adjustment module adjusts the tension of the material belt. Moreover, by means of the swing-type design of the tension adjustment module, the linkage between the tension adjustment module and the speed adjustment module is realized, providing a basis for the speed adjustment of the speed adjustment module. This allows the speed and tension of the reinforcing strip to be precisely controlled before reaching the alignment process, thereby improving the alignment accuracy between the reinforcing strip and the bag body.
[0006] A self-sealing bag's rib tension and speed adjustment device includes:
[0007] Speed regulation module; The speed regulation module includes: a drive roller and a variable frequency motor connected to the drive roller; The variable frequency motor is used to drive the drive roller to rotate so as to drive the material belt forward;
[0008] Fixed pulley; fixed pulley is used to receive the material belt conveyed by the drive roller and guide the material belt in a preset direction; and
[0009] Tension adjustment module; The tension adjustment module includes: a swing arm, a movable pulley installed at the free end of the swing arm, a counterweight block slidably connected to the swing arm, and an angle sensor installed at the pivot of the swing arm and electrically connected to the variable frequency motor; The movable pulley is used to receive the material belt transmitted by the fixed pulley and guide the material belt to the alignment process; The sliding trajectory of the counterweight block is consistent with the length direction of the swing arm; The angle sensor is used to detect the swing angle of the swing arm and feed back a speed regulation electrical signal to the variable frequency motor to adjust the rotation speed of the drive roller.
[0010] In the self-sealing bag's tension and speed adjustment device, the conveyor belt sequentially passes through the speed adjustment module, the fixed pulley, and the tension adjustment module. The variable frequency motor of the speed adjustment module drives the active roller to rotate, thus propelling the conveyor belt forward. After passing the fixed pulley, the conveyor belt enters the tension adjustment module. The tension adjustment module, centered on a swing arm, adjusts the distance between the counterweight and the swing arm's axis of rotation by sliding the position of the counterweight, thereby adjusting the lever arm length and the downward pressure at the free end of the swing arm, thus adjusting the conveyor belt tension. Simultaneously, an angle sensor is installed at the swing arm's axis of rotation. When the speed of the conveyor belt's front end, driven by the drive roller, is inconsistent with the speed of the active roller, the speeds of the front and rear ends of the conveyor belt are asynchronous, causing the swing arm to swing. The angle sensor feeds back a speed adjustment electrical signal to the variable frequency motor to adjust the output power and regulate the speed of the active roller. Through the above design, the speed adjustment module provides auxiliary power for the conveyor belt, thereby adjusting the forward speed of the belt. At the same time, the tension adjustment module adjusts the tension of the belt. Moreover, the swing-type design of the tension adjustment module enables the linkage between the tension adjustment module and the speed adjustment module, providing a basis for the speed adjustment of the speed adjustment module. This allows the speed and tension of the reinforcing strip to be precisely controlled before reaching the alignment process, improving the alignment accuracy between the reinforcing strip and the bag body.
[0011] In one embodiment, the movable pulley is located on the inner side of the swing arm, and the inner side of the counterweight is provided with a T-shaped groove for sliding connection to the swing arm. The movable pulley's location on the inner side of the swing arm reduces the risk of collision with external objects. The counterweight is slidably connected to the outer side of the swing arm via the T-shaped groove, facilitating sliding adjustment by the operator.
[0012] In one embodiment, a stop pin is provided at the outer end of the free end of the swing arm; the stop pin is used to limit the maximum stroke of the counterweight. The stop pin can limit the maximum formation of the counterweight and prevent the counterweight from detaching from the swing arm.
[0013] In one embodiment, the counterweight is provided with a locking handle for locking the relative position between the counterweight and the swing arm. The counterweight can be locked or unlocked by rotating the locking handle, making the operation simple.
[0014] In one embodiment, the tension adjustment module further includes: a first gear sleeved on the pivot of the swing arm and a second gear meshing with the first gear; the angle sensor is a potentiometer and is provided with an operating lever connected to the second gear; the first gear rotates synchronously with the pivot of the swing arm, and the operating lever rotates synchronously with the second gear. The first gear and the second gear are used to realize the transmission between the swing arm and the operating lever of the potentiometer. When the swing arm swings, it drives the operating lever of the potentiometer to rotate, thereby generating an electrical signal for acceleration or deceleration.
[0015] In one embodiment, the tension adjustment module further includes a first limiting rod and a second limiting rod disposed adjacent to each other; the first limiting rod is used to limit the maximum upward swing angle of the swing arm, and the second limiting rod is used to limit the maximum downward swing angle of the swing arm. The first limiting rod and the second limiting rod together constitute the swing angle range for the swing arm, preventing the swing angle of the swing arm from exceeding the preset range and colliding with adjacent components.
[0016] In one embodiment, elastic sleeves are fitted around the outer periphery of both the first and second limiting rods. The elastic sleeves can act as a buffer when the swing arm collides with the first or second limiting rod.
[0017] In one embodiment, the self-sealing bag's rib tension and speed adjustment device further includes: a bracket; the speed adjustment module, the fixed pulley, and the tension adjustment module are all mounted on the bracket. Integrating the speed adjustment module, the fixed pulley, and the tension adjustment module onto the bracket forms a modular unit that can be moved as a whole, facilitating disassembly and assembly and reducing the difficulty of machine adjustment. Attached Figure Description
[0018] Figure 1 This is a perspective view of the tension and speed adjustment device for the ribs of a self-sealing bag according to an embodiment of the present invention;
[0019] Figure 2 for Figure 1 A perspective view of the tension and speed adjustment device of the self-sealing bag's ribs, as shown;
[0020] Figure 3 for Figure 1 A perspective view of the speed adjustment module in the rib tension and speed adjustment device of the self-sealing bag shown;
[0021] Figure 4 for Figure 1 A perspective view of the tension adjustment module in the tension and speed adjustment device of the self-sealing bag shown;
[0022] Figure 5 for Figure 4 A three-dimensional view of the tension adjustment module from another perspective;
[0023] Figure 6 for Figure 1 The image shows the operating status of the self-sealing bag's rib tension and speed adjustment device;
[0024] Figure 7 for Figure 6 The diagram shows the working principle of the tension and speed adjustment device for the self-sealing bag's ribs.
[0025] The meanings of the labels in the attached diagram are as follows:
[0026] 100 - Tension and speed adjustment device for the ribs of a self-sealing bag;
[0027] 10-Speed adjustment module, 11-Driven roller, 12-Variable frequency motor, 13-Driven roller;
[0028] 20- Fixed pulley;
[0029] 30-Tension adjustment module, 31-Swing arm, 311-Stop pin, 32-Moving pulley, 33-Counterweight, 331-Locking handle, 34-Angle sensor, 35-First gear, 36-Second gear, 37-First limit rod, 38-Second limit rod, 39-Elastic sleeve;
[0030] 40-Staff;
[0031] 200-material strip. Detailed Implementation
[0032] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0036] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0037] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0038] like Figures 1 to 7 As shown, it is a self-sealing bag tension and speed adjustment device 100 according to an embodiment of the present invention.
[0039] like Figure 1 and Figure 2 As shown, the self-sealing bag's rib tension and speed adjustment device 100 includes: a speed adjustment module 10, a fixed pulley 20, and a tension adjustment module 30. Among these, combined with... Figure 6 and Figure 7As shown, the speed adjustment module 10 is used to provide driving force for the forward movement of the belt 200, the fixed pulley 20 is used to guide the forward direction of the belt 200, and the tension adjustment module 30 is used to adjust the tension of the belt 200 and provide the basis for speed adjustment module 10 to change speed through posture changes.
[0040] The following text, combined with Figures 1 to 7 As shown, the tension and speed adjustment device 100 of the self-sealing bag will be further explained.
[0041] like Figure 3 As shown, the speed adjustment module 10 includes a drive roller 11 and a variable frequency motor 12 connected to the drive roller 11. The variable frequency motor 12 is used to drive the drive roller 11 to rotate, thereby driving the material belt 200 forward. During operation, the variable frequency motor 12 drives the drive roller 11 to rotate, and the friction between the drive roller 11 and the material belt 200 drives the material belt 200 forward.
[0042] In addition, such as Figure 3 As shown, in order to improve the reliability of the drive roller 11 driving the belt 200, in this embodiment, the speed adjustment module 10 further includes a driven roller 13 arranged parallel to the drive roller 11. The belt 200 passes through the gap between the drive roller 11 and the driven roller 13, and the driven roller 13 ensures that the belt 200 is in close contact with the drive roller 11.
[0043] like Figure 1 As shown, the fixed pulley 20 is used to receive the material belt 200 transmitted by the active material roller 11 and guide the material belt 200 in a preset direction. In this embodiment, viewed horizontally, the fixed pulley 20 is located between the speed adjustment module 10 and the tension adjustment module 30. Viewed vertically, the fixed pulley 20 is located above the speed adjustment module 10 and the tension adjustment module 30.
[0044] like Figure 4 and Figure 5 As shown, the tension adjustment module 30 includes: a swing arm 31, a movable pulley 32 mounted on the free end of the swing arm 31, a counterweight 33 slidably connected to the swing arm 31, and an angle sensor 34 mounted on the pivot of the swing arm 31 and electrically connected to the variable frequency motor 12. The movable pulley 32 is used to receive the material belt 200 transmitted by the fixed pulley 20 and guide the material belt 200 to the alignment process. The sliding trajectory of the counterweight 33 is consistent with the length direction of the swing arm 31. The angle sensor 34 is used to detect the swing angle of the swing arm 31 and feed back a speed adjustment electrical signal to the variable frequency motor 12 to adjust the rotation speed of the drive roller 11.
[0045] The swing arm 31 is designed to swing, and the movable pulley 32 and the counterweight 33 are both mounted on the free end of the swing arm 31. By sliding the counterweight 33, the downward force of the free end of the swing arm 31 can be adjusted, thereby adjusting the tension of the material belt 200 between the movable pulley 32 and the fixed pulley 20.
[0046] To facilitate adjustment of the position of the counterweight 33 on the swing arm 31, such as Figure 5 As shown, in this embodiment, the counterweight 33 is provided with a locking handle 331 for locking the relative position between the counterweight 33 and the swing arm 31. By rotating the locking handle 331, the counterweight 33 can be locked or unlocked, which is easy to operate.
[0047] like Figure 4 and Figure 5 As shown, in this embodiment, the movable pulley 32 is located inside the swing arm 31, and the inner side of the counterweight 33 is provided with a T-shaped groove for sliding connection to the swing arm 31. The movable pulley 32 being located inside the swing arm 31 reduces the risk of collision with external objects. The counterweight 33 is slidably connected to the outer side of the swing arm 31 via the T-shaped groove, facilitating sliding adjustment by the operator.
[0048] like Figure 5 As shown, in this embodiment, a stop pin 311 is provided at the outer end of the free end of the swing arm 31. The stop pin 311 is used to limit the maximum stroke of the counterweight 33. The stop pin 311 can limit the maximum extension of the counterweight 33 and prevent the counterweight 33 from detaching from the swing arm 31.
[0049] Combination Figure 4 and Figure 5 As shown, in this embodiment, the tension adjustment module 30 may further include: a first gear 35 sleeved on the rotating shaft of the swing arm 31 and a second gear 36 meshing with the first gear 35. The angle sensor 34 is a potentiometer and is provided with an operating lever connected to the second gear 36. The first gear 35 rotates synchronously with the rotating shaft of the swing arm 31, and the operating lever rotates synchronously with the second gear 36. The first gear 35 and the second gear 36 are used to realize the transmission between the swing arm and the operating lever of the potentiometer. When the swing arm swings, it drives the operating lever of the potentiometer to rotate, thereby generating an electrical signal for acceleration or deceleration.
[0050] like Figure 1 As shown, in this embodiment, the tension adjustment module 30 may further include a first limiting rod 37 and a second limiting rod 38 disposed adjacent to the swing arms 31. The first limiting rod 37 is used to limit the maximum upward swing angle of the swing arms 31, and the second limiting rod 38 is used to limit the maximum downward swing angle of the swing arms 31. The first limiting rod 37 and the second limiting rod 38 together constitute the swing angle range for the swing arms 31, preventing the swing angle of the swing arms 31 from exceeding the preset range and colliding with adjacent components.
[0051] Furthermore, elastic sleeves 39 can be fitted onto the outer periphery of both the first limiting rod 37 and the second limiting rod 38. The elastic sleeves 39 can act as a buffer when the swing arm collides with the first limiting rod 37 or the second limiting rod 38.
[0052] like Figure 1 and Figure 2 As shown, in this embodiment, the self-sealing bag's rib tension and speed adjustment device 100 may further include a bracket 40. The speed adjustment module 10, the fixed pulley 20, and the tension adjustment module 30 are all mounted on the bracket 40. Integrating the speed adjustment module 10, the fixed pulley 20, and the tension adjustment module 30 onto the bracket 40 forms a modular unit that can be moved as a whole, facilitating disassembly and assembly and reducing the difficulty of machine adjustment.
[0053] It should be noted that in other embodiments, the self-sealing bag's rib tension and speed adjustment device 100 may not have a bracket 40, that is, the speed adjustment module 10, the fixed pulley 20, and the tension adjustment module 30 can be installed on one side of the frame of the self-sealing bag sewing machine.
[0054] Brief description of working principle:
[0055] like Figure 6 As shown, during operation, the conveyor belt 200 passes sequentially through the speed adjustment module 10, the fixed pulley 20, and the tension adjustment module 30.
[0056] Combination Figure 6 and Figure 7 As shown, the variable frequency motor 12 of the speed adjustment module 10 drives the active material roller 11 to rotate, thereby driving the material belt 200 forward. The material belt 200 then passes through the fixed pulley 20 and enters the tension adjustment module 30. The tension adjustment module 30 is centered on the swing arm 31. By sliding and adjusting the position of the counterweight 33, the distance between the counterweight 33 and the rotation axis of the swing arm 31 can be adjusted, thereby adjusting the length of the lever arm and thus adjusting the downward pressure at the free end of the swing arm 31. This method is used to adjust the tension of the material belt 200.
[0057] At the same time, combined Figure 4 , Figure 5 ,as well as Figure 7An angle sensor 34 is installed at the pivot of the swing arm 31. When the speed of the front end of the material belt 200 driven by the drive roller is inconsistent with the speed of the active material roller 11, the speeds of the front and rear ends of the material belt 200 are out of sync, causing the swing arm 31 to swing. The angle sensor 34 feeds back a speed regulation electrical signal to the variable frequency motor 12 to adjust the output power and regulate the rotational speed of the active material roller 11. Whenever the swing arm 31 moves away from the preset zero position due to swinging, the angle sensor 34 generates a corresponding acceleration or deceleration electrical signal. For example, when the speed of the front end of the material belt 200 is greater than the speed of the rear end, the free end of the swing arm 31 will be pulled up by the front end of the material belt 200. At this time, the angle sensor 34 detects that the swing arm 31 is swinging upward and sends an acceleration electrical signal to the variable frequency motor 12. The variable frequency motor 12 increases the output power to increase the rotational speed of the active material roller 11. Conversely, when the speed at the front end of the conveyor belt 200 is less than the speed at the rear end, the conveyor belt 200 becomes loose, and the free end of the swing arm 31 sinks. At this time, the angle sensor 34 detects that the swing arm 31 has swayed and sends a deceleration electrical signal to the variable frequency motor 12. The variable frequency motor 12 reduces its output power to reduce the speed of the drive roller 11. After the variable frequency motor 12 accelerates or adjusts its speed, the swing arm 31 returns to the preset zero position (during the process of the swing arm 31 returning to the preset zero position, the variable frequency motor 12 maintains its current output power).
[0058] The aforementioned self-sealing bag's rib tension and speed adjustment device 100 utilizes the speed adjustment module 10 to provide auxiliary power for conveying the material belt 200, thereby adjusting the forward speed of the material belt 200. Simultaneously, it utilizes the tension adjustment module 30 to adjust the tension of the material belt 200. Furthermore, through the swing-type design of the tension adjustment module 30, it achieves linkage between the tension adjustment module 30 and the speed adjustment module 10, providing a basis for the speed adjustment of the speed adjustment module 10. This allows for precise control of the speed and tension of the rib before reaching the alignment process, improving the alignment accuracy between the rib and the bag body.
[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0060] The above embodiments only illustrate preferred implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A device for adjusting the tension and speed of the ribs in a self-sealing bag, characterized in that, include: Speed regulation module; The speed adjustment module includes: an active material roller and a variable frequency motor connected to the active material roller; the variable frequency motor is used to drive the active material roller to rotate so as to drive the material belt forward; Fixed pulley; the fixed pulley is used to receive the material belt conveyed by the active roller and guide the material belt in a preset direction; and A tension adjustment module includes: a swing arm, a movable pulley mounted on the free end of the swing arm, a counterweight slidably connected to the swing arm, and an angle sensor mounted on the pivot of the swing arm and electrically connected to the variable frequency motor; the movable pulley is used to receive the material strip transmitted by the fixed pulley and guide the material strip to the alignment process; the sliding trajectory of the counterweight is consistent with the length direction of the swing arm; the angle sensor is used to detect the swing angle of the swing arm and feed back a speed adjustment electrical signal to the variable frequency motor to adjust the rotation speed of the drive roller.
2. The self-sealing bag tension and speed adjustment device according to claim 1, characterized in that, The movable pulley is located inside the swing arm, and the inner side of the counterweight is provided with a T-shaped groove that slidably connects to the swing arm.
3. The self-sealing bag tension and speed adjustment device according to claim 2, characterized in that, The outer end of the free end of the swing arm is provided with a stop pin; the stop pin is used to limit the maximum stroke of the counterweight.
4. The self-sealing bag tension and speed adjustment device according to claim 1, characterized in that, The counterweight is provided with a locking handle for locking the relative position between the counterweight and the swing arm.
5. The self-sealing bag tension and speed adjustment device according to claim 1, characterized in that, The tension adjustment module further includes: a first gear sleeved on the rotating shaft of the swing arm and a second gear meshing with the first gear; the angle sensor is a potentiometer and is provided with an operating lever connected to the second gear; the first gear rotates synchronously with the rotating shaft of the swing arm, and the operating lever rotates synchronously with the second gear.
6. The self-sealing bag tension and speed adjustment device according to claim 1, characterized in that, The tension adjustment module further includes: a first limiting rod and a second limiting rod arranged adjacent to the swing arm; the first limiting rod is used to limit the maximum angle of the swing arm swinging upward, and the second limiting rod is used to limit the maximum angle of the swing arm swinging downward.
7. The self-sealing bag tension and speed adjustment device according to claim 6, characterized in that, Both the first limiting rod and the second limiting rod are fitted with elastic sleeves on their outer periphery.
8. The self-sealing bag tension and speed adjustment device according to claim 1, characterized in that, Also includes: support; The speed adjustment module, the fixed pulley, and the tension adjustment module are all mounted on the bracket.