An automatic bag-applying device

Abstract

This application discloses an automatic pocket-attaching device for sewing pockets onto fabric. The device includes a sewing assembly, a mounting plate, a drive assembly, and a recognition assembly. The mounting plate is at least partially mounted on the sewing assembly. The drive assembly includes a power component, a drive wheel, a transmission belt, and a driven wheel. The power component is mounted on the mounting plate, and the drive wheel is drivenly connected to its output end. The driven wheel is mounted on the mounting plate via a bearing and is concentrically arranged with the needle of the sewing assembly. The transmission belt drives the drive wheel and the driven wheel. The recognition assembly is mounted on the driven wheel and can rotate with it to guide the sewing direction of the needle. The recognition assembly can project a reference point onto the sewing plane. The distance between the vertical projection point of the needle on the sewing plane and the reference point is 8mm-15mm to prevent the needle sewing path from exceeding the pocket edge. This application can prevent the needle from sewing beyond the pocket edge, improve work efficiency, and reduce the rework rate.

Description

Technical Field

[0001] This application relates to the technical field of sewing equipment, and more particularly to an automatic bag-applying device. Background Technology

[0002] In the garment manufacturing industry, automated pocket attaching equipment using laser-guided technology to automate the sewing path has become the mainstream solution. In existing technologies, the laser projects a light spot along a preset trajectory to guide the needle's movement. However, significant technical drawbacks exist in practical applications: due to the lack of a dynamic feedback adjustment mechanism in the laser-guided system, when the needle continuously follows the laser, if the laser point extends beyond the pocket edge, the needle may continue to follow, causing the sewing to extend beyond the pocket edge. This is not only unsightly but also requires rework, reducing production efficiency. Utility Model Content

[0003] The purpose of this application is to provide an automatic bag-applying device that can solve the above-mentioned problems existing in the prior art.

[0004] To achieve the above objectives, this application adopts the following technical solution: On one hand, an automatic pocket-attaching device is provided for sewing pockets onto fabric. The automatic pocket-attaching device includes: a sewing assembly, a mounting plate, a drive assembly, and a recognition assembly. The sewing assembly is electrically connected to the drive assembly and the recognition assembly. The mounting plate is at least partially mounted on the sewing assembly. The drive assembly includes a power component, a drive wheel, a transmission belt, and a driven wheel. The power component is mounted on the mounting plate. The drive wheel is drivenly connected to the output end of the power component. The driven wheel is mounted on the mounting plate via a bearing and is concentrically arranged with the needle of the sewing assembly. The transmission belt drivesly connects the drive wheel and the driven wheel. The recognition assembly is mounted on the driven wheel and can rotate with the driven wheel to guide the sewing direction of the needle. The identification component can project a reference point toward the sewing plane. The distance between the vertical projection point of the needle on the sewing plane and the reference point is 8mm-15mm to prevent the needle sewing path from crossing the pocket.

[0005] Furthermore, the identification component includes a bracket and a laser emitter. The laser emitter is mounted on the driven wheel via the bracket, and the center line of the emitting end of the laser emitter forms an angle less than a right angle with the vertical plane.

[0006] Furthermore, the bracket includes a main board fixed to the driven wheel by screws, and a folded edge extending obliquely upward from the edge of the main board in a direction away from the needle, wherein the laser emitter is fixed to the folded edge by screws.

[0007] Furthermore, the bottom of the mounting plate is provided with a connecting member arranged concentrically with the needle, and the driven wheel is connected to the connecting member through the bearing.

[0008] Furthermore, the sewing assembly includes a crossbeam having a first end and a second end, a mounting plate having a third end and a fourth end, a needle disposed at the first end of the crossbeam, the third end of the mounting plate being mounted at the first end of the crossbeam, the fourth end of the mounting plate extending toward the second end of the crossbeam, and a power component being mounted at the fourth end of the mounting plate.

[0009] Furthermore, the power component is a motor, which is mounted on the upper side of the fourth end of the mounting plate.

[0010] Furthermore, reinforcing ribs are provided between the mounting plate and the crossbeam.

[0011] Furthermore, the drive assembly also includes a tensioning pulley, which is movably mounted on the mounting plate and contacts the outer side of the drive belt to adjust the tension of the drive belt.

[0012] Furthermore, the mounting plate has a waist hole, and the tensioning wheel is locked to the waist hole by screws.

[0013] Furthermore, the outer circumferential surfaces of the driving wheel and the driven wheel are provided with multiple slots, and the inner circumferential surface of the transmission belt is provided with protrusions that cooperate and connect with the slots.

[0014] The beneficial effects of this application are as follows: By setting a driven wheel concentrically arranged with the needle and a rotating recognition component, combined with a specific projection point spacing design and a real-time monitoring mechanism, precise dynamic control of the needle sewing path is achieved. The recognition component can sensitively identify the pocket edge. When the reference point moves outside the pocket, it promptly controls the sewing component to stop and switch paths, avoiding sewing exceeding the boundary caused by the needle continuing to work. This greatly improves the appearance quality of the finished garment, reduces the need for rework due to unsightly appearances, and thus significantly improves production efficiency. Secondly, the device has a reasonable structure and ingenious design. The components work together to ensure sewing accuracy without excessively increasing the complexity and cost of the equipment. It has high practicality and economy, providing a more reliable and efficient solution for automated production in the garment processing industry. Attached Figure Description

[0015] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the automatic bag-applying device described in an embodiment of this application; Figure 2 This is a schematic diagram of the sewing assembly described in an embodiment of this application; Figure 3 This is an assembly diagram of the mounting plate, driving component, and identification component described in the embodiments of this application; Figure 4 This is an exploded view of the mounting plate, driving component, and identification component described in the embodiments of this application.

[0017] In the diagram: 1. Sewing assembly; 101. Needle; 102. Crossbeam; 2. Mounting plate; 3. Drive assembly; 301. Power component; 302. Drive wheel; 303. Transmission belt; 304. Driven wheel; 4. Identification assembly; 401. Bracket; 402. Laser emitter; 5. Connector; 6. Bearing; 7. Reinforcing rib; 8. Tensioner. Detailed Implementation

[0018] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] like Figures 1-4As shown, this embodiment provides an automatic pocket-attaching device for sewing pockets onto fabric. The automatic pocket-attaching device includes: a sewing assembly 1, a mounting plate 2, a drive assembly 3, and a recognition assembly 4. The sewing assembly 1 is electrically connected to the drive assembly 3 and the recognition assembly 4. The mounting plate 2 is at least partially mounted on the sewing assembly 1. The drive assembly 3 includes a power component 301, a drive wheel 302, a transmission belt 303, and a driven wheel 304. The power component 301 is mounted on the drive assembly 1. The mounting plate 2 has a drive wheel 302 that is connected to the output end of the power component 301. The driven wheel 304 is mounted on the mounting plate 2 via a bearing 6 and is arranged concentrically with the needle 101 of the sewing assembly 1. The drive belt 303 drives the drive wheel 302 and the driven wheel 304. The identification component 4 is mounted on the driven wheel 304 and can rotate with the driven wheel 304 to guide the sewing direction of the needle 101. The identification component 4 can project a reference point toward the sewing plane. The distance between the vertical projection point of the needle 101 on the sewing plane and the reference point is 8mm-15mm, so as to prevent the sewing path of the needle 101 from crossing the pocket.

[0022] In the automatic pocket applicator of this embodiment, to address the problem in the prior art where the lack of dynamic feedback in laser guidance causes the needle 101 to easily sew beyond the pocket edge, a sophisticated and clearly defined design scheme is adopted. The device's drive mechanism has a clear functional division, achieving efficient coordination between the sewing action of the needle 101 and the rotational guidance of the recognition component 4. When the needle 101 begins sewing in a certain direction, its power source is either the power system inherent in the sewing assembly 1 itself or an externally independent power system. The sewing assembly 1 itself may be equipped with a dedicated motor or other power device, providing stable and continuous power for the reciprocating motion of the needle 101 and its linear or curved movement on the fabric, ensuring that the needle 101 can accurately perform the sewing operation on the fabric according to the preset sewing path. Alternatively, an external power system can precisely transmit power to the sewing assembly 1 through a specific transmission structure, such as a chain or gear set, to drive the needle 101 to sew.

[0023] Meanwhile, the main function of the power unit 301 is to precisely control the rotation of the identification component 4. During the sewing process of the needle 101 in a certain direction, the identification component 4 is in a relatively stationary state, projecting a fixed reference point onto the sewing plane. This reference point maintains a distance of 8mm-15mm from the vertical projection point of the needle 101 on the sewing plane, providing stable guidance for the needle 101 to sew in that direction and preventing the needle 101 from going over the edge of the pocket when sewing in that direction.

[0024] After the needle 101 completes sewing in the current direction, the power unit 301 begins to play a crucial role. Based on a preset program or received control signals, it increases power output or adjusts the transmission mode, driving the driven wheel 304 to rotate via the drive wheel 302 and transmission belt 303. Since the driven wheel 304 is concentrically arranged with the needle 101 of the sewing assembly 1, and the identification component 4 is mounted on the driven wheel 304, the rotation of the driven wheel 304 causes the identification component 4 to rotate synchronously, thereby changing the position of the reference point and accurately pointing to the next direction to be sewn. During the rotation of the identification component 4, its electrical connection with the sewing assembly 1 allows it to feed back the reference point position information to the sewing assembly 1 in real time. Based on this feedback, the sewing assembly 1 adjusts the movement direction of the needle 101, and again, based on the distance relationship between the projection point of the needle 101 and the reference point, ensures that the needle 101 sews accurately in the new direction without crossing the edge of the pocket.

[0025] The automatic pocket applicator of this embodiment brings significant and multifaceted benefits. In addressing the core problem, by clearly dividing the sewing power of the needle 101 and the rotation control power of the identification component 4, more precise and efficient control of the needle 101's sewing process is achieved. The needle 101 is driven by the sewing component 1 itself or an external power system, ensuring stable and sufficient power during sewing, guaranteeing smoothness and accuracy. The power component 301 is specifically used to control the rotation of the identification component 4. After the needle 101 completes sewing in one direction, it precisely changes the reference point position, guiding the needle 101 to switch to the next direction. During sewing in each direction, the fixed reference point projected by the identification component 4 provides stable guidance for the needle 101. Combined with the specific distance between the needle 101's projection point and the reference point, it effectively prevents the needle 101 from crossing the pocket edge during sewing in a single direction, greatly improving the appearance quality of the finished garment, reducing rework caused by inaccurate sewing, and thus significantly improving production efficiency.

[0026] From the perspective of device structure and cost, this automatic pocket-attaching device boasts a reasonable and ingenious design. The components work collaboratively, achieving efficient and precise sewing control through clear functional division of labor, without excessively increasing the complexity and cost of the equipment, thus demonstrating high practicality and economy. This design is not only suitable for large-scale garment production and processing but also highly adaptable to small-batch customized production with high quality requirements. It provides a reliable and efficient solution for automated production in the garment processing industry, contributing to the advancement and development of the entire industry's technological level.

[0027] Furthermore, the identification component 4 includes a bracket 401 and a laser emitter 402. The laser emitter 402 is mounted on the driven wheel 304 via the bracket 401, and the center line of the emitting end of the laser emitter 402 forms an angle less than a right angle with the vertical plane. The bracket 401 serves as the mounting carrier for the laser emitter 402, securely placing it on the driven wheel 304, allowing the laser emitter 402 to move synchronously with the rotation of the driven wheel 304, thereby achieving dynamic response to different sewing directions. The angle less than a right angle formed between the center line of the emitting end of the laser emitter 402 and the vertical plane is a key design feature ensuring sewing accuracy. When the driven wheel 304 rotates, the laser emitter 402 rotates accordingly. Due to this angle, the laser beam projected by the laser emitter 402 is not perpendicular to the sewing plane, but rather projected at an angle. When the needle 101 sews in a certain direction, this tilted laser beam forms a reference point on the sewing plane. This angle is carefully designed to ensure that the distance between the reference point and the vertical projection point of the needle 101 on the sewing plane remains within a preset range. As the driven wheel 304 rotates, causing the laser emitter 402 to change position, the reference point also moves accordingly on the sewing plane. However, regardless of its movement, thanks to the precise setting of this angle, the distance between the reference point and the vertical projection point of the needle 101 remains stably maintained at the preset value. This provides precise and reliable dynamic guidance for the needle 101 sewing in different directions, effectively preventing the needle 101 from going out of bounds during sewing and ensuring that the sewing path strictly conforms to the design requirements of the pocket edge. Moreover, the existence of this angle allows the projection position of the laser beam on the fabric to more accurately match the sewing path of the needle 101. Furthermore, considering the possible slight undulations or deformations in the fabric, the tilted laser beam can better adapt to these situations, ensuring that the reference point always provides reliable guidance for the needle 101.

[0028] Furthermore, the bracket 401 includes a main plate fixed to the driven wheel 304 by screws, and a flange extending obliquely upward from the edge of the main plate in a direction away from the needle 101. The laser emitter 402 is fixed to the flange by screws. The main plate is securely mounted on the driven wheel 304 by screws, allowing the main plate to rotate synchronously with the driven wheel 304. The driven wheel 304, as a key component for power transmission and direction conversion, rotates to change the projection direction of the laser emitter 402 according to sewing needs, thereby guiding the needle 101 to sew accurately in different directions. The main plate, as the foundation of the bracket 401, provides a stable mounting platform for the entire bracket 401, ensuring that the bracket 401 does not wobble or shift during rotation with the driven wheel 304, thus guaranteeing the accuracy of the laser emitter 402's position. The flange extending obliquely upward from the edge of the main plate in a direction away from the needle 101 is a key part for mounting the laser emitter 402. The design of the folded edge extending obliquely upwards and away from the direction of the needle 101 is carefully considered. When the laser emitter 402 is fixed to the folded edge with screws, this structure positions the laser emitter 402 in a specific spatial position. Because the folded edge is obliquely upwards, the emitting end of the laser emitter 402 can project the laser beam onto the sewing plane at a suitable angle. Simultaneously, the design away from the direction of the needle 101 avoids potential interference between the laser emitter 402 and the needle 101 during movement, ensuring that both the needle 101 and the laser emitter 402 can complete their respective actions independently and smoothly. When the driven wheel 304 drives the main board to rotate, the folded edge rotates synchronously, thereby causing the laser emitter 402 to change its projection direction, providing dynamic guidance for the needle 101's sewing in different directions.

[0029] In addition, the bottom of the mounting plate 2 is provided with a connecting member 5 arranged concentrically with the needle 101, and the driven wheel 304 is connected to the connecting member 5 through the bearing 6. The connecting member 5 serves as the mounting base for the bearing 6, providing a basic guarantee for the rotational installation of the driven wheel 304 and ensuring that the driven wheel 304 can be arranged concentrically with the needle 101.

[0030] In some embodiments, the sewing assembly 1 includes a crossbeam 102 having a first end and a second end, a mounting plate 2 having a third end and a fourth end, a needle 101 disposed at the first end of the crossbeam 102, the third end of the mounting plate 2 mounted at the first end of the crossbeam 102, the fourth end of the mounting plate 2 extending toward the second end of the crossbeam 102, and a power component 301 mounted at the fourth end of the mounting plate 2. By mounting the third end of the mounting plate 2 at the first end of the crossbeam 102, extending the fourth end toward the second end of the crossbeam 102, and mounting the power component 301 at the fourth end of the mounting plate 2, this compact layout effectively saves internal space. In garment processing equipment, space is often very precious; a reasonable spatial layout can make the equipment more compact and small, facilitating installation and placement within limited factory space. Simultaneously, this design avoids the power component 301 protruding from the outside of the device, not only making the device appearance neater and more aesthetically pleasing but also reducing the risk of the power component 301 colliding with the surrounding environment, thus improving the safety and reliability of the equipment.

[0031] Specifically, the power component 301 is a motor, which is mounted on the upper side of the fourth end of the mounting plate 2. This mounting method ensures that the motor does not occupy additional space in other directions of the device, preventing it from protruding beyond the main structure of the device, thus making the overall structure of the device more compact and rational. The compact structure not only facilitates the installation and placement of the equipment in the factory, but also reduces the risk of collision with surrounding objects during operation, improving the safety and stability of the equipment. At the same time, the compact design also contributes to the overall aesthetics of the equipment, making the device look neater and more professional.

[0032] In addition, a reinforcing rib 7 is provided between the mounting plate 2 and the crossbeam 102. During long-term use, without the support of the reinforcing rib 7, the mounting plate 2 may experience cracks, deformation, or even breakage due to excessive stress, leading to equipment malfunction and requiring frequent maintenance and component replacement. This not only increases equipment maintenance costs but also affects production schedules. The reinforcing rib 7 effectively disperses stress, reduces stress concentration on the mounting plate 2, minimizes fatigue damage to components, and allows the mounting plate 2 and other related components to maintain good working condition for a longer period.

[0033] Optionally, the drive assembly 3 further includes a tensioning pulley 8, which is movably mounted on the mounting plate 2 and contacts the outer side of the transmission belt 303 to adjust the tension of the transmission belt 303. The tensioning pulley 8 allows for real-time adjustment of the tension of the transmission belt 303, effectively preventing slippage due to slack. During the operation of the automatic bag-applying device, regardless of the cause of slack in the transmission belt 303, the appropriate tension can be restored by adjusting the position of the tensioning pulley 8. This ensures that the power output from the motor is consistently and accurately transmitted to the driven pulley 304, guaranteeing uniform movement speed and precise movement trajectory of the identification assembly 4.

[0034] Meanwhile, the mounting plate 2 has a waist hole, and the tensioning wheel 8 is locked to the waist hole by screws. Compared with traditional fixed holes, the waist hole allows the tensioning wheel 8 to be finely adjusted within a range. The operator can precisely move the tensioning wheel 8 to the most suitable position according to the actual slack of the transmission belt 303, thereby achieving precise control of the tension of the transmission belt 303. This precise adjustment ensures that the transmission belt 303 is always in the optimal tension state, neither too tight, which would cause excessive internal stress, accelerated wear, and fatigue fracture, nor too loose, which would cause slippage. This effectively ensures the stability and reliability of power transmission and improves sewing quality.

[0035] It is worth mentioning that the outer circumference of the driving wheel 302 and the driven wheel 304 is provided with multiple slots, and the inner circumference of the transmission belt 303 is provided with protrusions that engage with the slots. When the automatic bag-applying device is running, the motor drives the driving wheel 302 to rotate. The driving wheel 302, as the power input, transmits rotational power to the transmission belt 303. The transmission belt 303 is the medium for power transmission; it needs to tightly and stably connect the driving wheel 302 and the driven wheel 304 to ensure that power can be efficiently and accurately transmitted to the driven wheel 304, thereby driving the identification component 4 to rotate quickly and accurately. The multiple slots on the outer circumference of the driving wheel 302 and the driven wheel 304, and the protrusions on the inner circumference of the transmission belt 303 that engage with them, form a unique meshing structure. When the driving wheel 302 rotates, its slots generate a lateral thrust on the protrusions on the inner side of the transmission belt 303. Because the shapes and sizes of the slots and protrusions match, the protrusions can accurately fit into the slots. This meshing method prevents easy relative slippage between the drive belt 303 and the drive pulley 302. Similarly, when the drive belt 303 transmits power to the driven pulley 304, the protrusions on the drive belt 303 also fit into the slots of the driven pulley 304, causing the driven pulley 304 to rotate synchronously. Compared with the traditional method of transmitting power through friction, this matching connection of slots and protrusions can provide a greater transmission torque.

[0036] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, 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, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0037] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0038] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0039] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. An automatic pocket-attaching device for sewing pockets onto fabric, characterized in that, include: The sewing assembly (1), mounting plate (2), drive assembly (3), and identification assembly (4) are provided. The sewing assembly (1) is electrically connected to the drive assembly (3) and the identification assembly (4). The mounting plate (2) is at least partially mounted on the sewing assembly (1). The drive assembly (3) includes a power component (301), a drive wheel (302), a transmission belt (303), and a driven wheel (304). The power component (301) is mounted on the mounting plate (2). The drive wheel (302) is connected to the power component (304). The output end of the drive wheel (301) is connected to the drive wheel (302). The driven wheel (304) is mounted on the mounting plate (2) via the bearing (6). The driven wheel (304) and the needle (101) of the sewing assembly (1) are arranged concentrically. The drive belt (303) drives the drive wheel (302) and the driven wheel (304). The identification component (4) is mounted on the driven wheel (304). The identification component (4) can rotate with the driven wheel (304) to guide the sewing direction of the needle (101). The identification component (4) is able to project a reference point toward the sewing plane. The distance between the vertical projection point of the needle (101) on the sewing plane and the reference point is 8mm-15mm, so as to prevent the sewing path of the needle (101) from crossing the pocket.

2. The automatic bag-applying device according to claim 1, characterized in that, The identification component (4) includes a bracket (401) and a laser emitter (402). The laser emitter (402) is mounted on the driven wheel (304) via the bracket (401), and the center line of the emitting end of the laser emitter (402) forms an angle less than a right angle with the vertical plane.

3. The automatic bag-applying device according to claim 2, characterized in that, The bracket (401) includes a main board fixed to the driven wheel (304) by screws, and a folded edge extending obliquely upward from the edge of the main board in a direction away from the needle (101), and the laser emitter (402) is fixed to the folded edge by screws.

4. The automatic bag-applying device according to any one of claims 1-3, characterized in that, The bottom of the mounting plate (2) is provided with a connector (5) arranged concentrically with the needle (101), and the driven wheel (304) is connected to the connector (5) through the bearing (6).

5. The automatic bag-applying device according to any one of claims 1-3, characterized in that, The sewing assembly (1) includes a crossbeam (102) having a first end and a second end, a mounting plate (2) having a third end and a fourth end, a needle (101) being disposed at the first end of the crossbeam (102), the third end of the mounting plate (2) being mounted at the first end of the crossbeam (102), the fourth end of the mounting plate (2) extending toward the second end of the crossbeam (102), and a power component (301) being mounted at the fourth end of the mounting plate (2).

6. The automatic bag-applying device according to claim 5, characterized in that, The power component (301) is a motor, which is mounted on the upper side of the fourth end of the mounting plate (2).

7. The automatic bag-applying device according to claim 5, characterized in that, A reinforcing rib (7) is also provided between the mounting plate (2) and the crossbeam (102).

8. The automatic bag-applying device according to any one of claims 1-3, characterized in that, The drive assembly (3) also includes a tension wheel (8), which is movably mounted on the mounting plate (2) and contacts the outside of the transmission belt (303) to adjust the tension of the transmission belt (303).

9. The automatic bag-applying device according to claim 8, characterized in that, The mounting plate (2) has a waist hole, and the tensioning wheel (8) is locked to the waist hole by screws.

10. The automatic bag-applying device according to any one of claims 1-3, characterized in that, The driving wheel (302) and the driven wheel (304) are provided with multiple slots on their outer circumference, and the transmission belt (303) is provided with protrusions on its inner circumference that cooperate with the slots.

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