Paper-plastic bag twin detection device
By using an encoder and swing arm structure to detect the thickness of paper-plastic bags, the problem of multiple paper-plastic bags being accidentally sucked up by the automatic hot melt sealing machine has been solved, achieving accurate detection and efficient production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WENZHOU CHAOWANG MASCH CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-04-24
AI Technical Summary
In existing technologies, automatic hot melt sealing machines are prone to accidentally sucking up multiple paper-plastic bags, making manual identification difficult, increasing costs, and potentially causing product waste.
Employing an encoder and swing arm structure, the thickness change of paper-plastic bags is detected through the cooperation of a rotating wheel and a lever. The encoder feedback signal controls the alarm device to achieve accurate detection.
It enables accurate detection of twin paper-plastic bags, reduces manual intervention, lowers the false detection rate and labor costs, and improves production efficiency.
Smart Images
Figure CN224163142U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of packaging bag processing technology, and in particular to a twin detection device for paper-plastic bags. Background Technology
[0002] In existing technologies, automatic hot melt sealing machines use automatic suction cups to pick up bags. However, because suction cups can easily pick up multiple paper-plastic bags at the same time, most currently rely on manual identification to check if multiple paper-plastic bags are being picked up by the automatic suction cups simultaneously. When manual identification is used, not only are false detections easy to occur, but it also leads to increased labor costs. When a bag is missed and sold to a customer, since the customer uses automatic filling, multiple paper-plastic bags cannot be identified at once, and the material cannot be filled in, resulting in waste and rework. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the prior art by providing a paper-plastic bag twin detection device. The device collects the amount of rotation of the swing arm through an encoder, thereby providing feedback on the thickness of the paper-plastic bag. It has good stability, accurate detection effect, and high sensitivity.
[0004] This utility model discloses a twin detection device for paper-plastic bags, including a frame, an alarm device, and a control circuit. The frame is characterized by having a rotating shaft, an encoder, a swing arm, and a lever for driving the swing arm to rotate. The encoder is electrically connected to the control circuit. One end of the swing arm is mounted on the rotating shaft and rotates synchronously with it. A gear is fitted onto the input end of the encoder. An arc-shaped rack is mounted on the other end of the swing arm, meshing with the gear. The frame also has an elastic reset component for resetting the swing arm after swinging. One end of the lever is mounted on the rotating shaft and rotates synchronously with it, while the other end is connected to a rotating wheel, which is rotatably mounted on the lever.
[0005] A further feature of this invention is that a first bearing is provided on the frame at the position corresponding to the rotating shaft, and the rotating shaft passes through the first bearing.
[0006] A further feature of this invention is that the frame is provided with blocking members on both sides opposite to the swing arm to limit the swing angle of the swing arm. The elastic reset member is a tension spring, which pulls the swing arm against one of the blocking members so that the lever swings to form a suspended state of the rotating wheel.
[0007] A further feature of this invention is that a hinge shaft is horizontally provided on the lever, a second bearing is sleeved on the hinge shaft, and a rotating wheel is sleeved on the second bearing.
[0008] A further feature of this invention is that the alarm device is at least one of an electric bell or an indicator light.
[0009] Using the above technical solution, when in use, it is assembled onto the machine with the rotating wheel positioned above the conveyor belt. When the conveyor belt transports paper-plastic bags past the rotating wheel, if there are stacked paper-plastic bags, the excessive thickness will push against the rotating wheel, causing the lever to swing. This swings the lever via the rotating shaft, which in turn drives the swing arm to swing. At this time, the arc-shaped rack drives the gear to rotate, and the encoder processes the electrical signal, which is fed back to the control circuit. The control circuit then controls the alarm device to sound an alarm, indicating that the stacked paper-plastic bags have passed. Conversely, when a single paper-plastic bag passes by, the rotating wheel rotates normally. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0011] Figure 2 This is a schematic diagram of part of the structure of this utility model;
[0012] Figure 3 This is a schematic diagram of part of the structure of this utility model;
[0013] Figure 4 This is the control circuit diagram of this utility model. Detailed Implementation
[0014] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings:
[0015] In the description of this utility model, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", 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 utility model 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 utility model.
[0016] This utility model discloses a twin detection device for paper-plastic bags, including a frame 1, an alarm device 2, and a control circuit. In this embodiment, the frame 1 is provided with a rotating shaft 3, an encoder 4, a swing arm 5, and a lever 6 for driving the swing arm 5 to rotate. The encoder 4 is electrically connected to the control circuit. One end of the swing arm 5 is mounted on the rotating shaft 3 and rotates synchronously with it. A gear 7 is sleeved on the input end of the encoder 4. An arc-shaped rack 8 is provided on the other end of the swing arm 5, and the arc-shaped rack 8 meshes with the gear 7. The frame 1 is also provided with an elastic reset member 9 for driving the swing arm 5 to swing and then reset. One end of the lever 6 is mounted on the rotating shaft 3 and rotates synchronously with it. A rotating wheel 10 is connected to the other end of the lever 6, and the rotating wheel 10 is rotatably mounted on the lever 6.
[0017] Using the above technical solution, when in use, it is assembled onto the machine and the rotating wheel 10 is positioned above the conveyor belt. When the conveyor belt transports paper-plastic bags past the position of the rotating wheel 10, if there are stacked paper-plastic bags, the thickness will be too great, which will push the rotating wheel 10, causing the lever 6 to swing. This swings the lever 5 through the rotating shaft 3. At this time, the arc-shaped rack 8 can drive the gear 7 to rotate, and the encoder 4 processes the electrical signal and feeds it back to the control circuit. The control circuit then controls the alarm device 2 to sound an alarm, indicating that the stacked paper-plastic bags have passed. Conversely, when a single paper-plastic bag passes by, the rotating wheel 10 rotates normally.
[0018] A first bearing 11 is provided on the frame 1 at the position corresponding to the rotating shaft 3. The rotating shaft 3 passes through the first bearing 11, which can reduce friction and make the product more responsive.
[0019] The frame 1 is provided with blocking members 12 (preferably a stop bar) on both sides opposite to the swing arm 5 to limit the swing angle of the swing arm 5. The elastic reset member 9 is a tension spring. The tension spring pulls the swing arm 5 against one of the blocking members 12 so that the lever 6 swings to form the rotating wheel 10 in a suspended state, preventing the swing arm 5 from rotating excessively. This can prevent the arc rack 8 from disengaging from the gear 7 and prevent the encoder 4 from being damaged. In addition, the blocking member 12 can also play a supporting role, so that the rotating wheel 10 can be suspended above the conveyor belt.
[0020] The lever 6 is horizontally provided with a hinge shaft 13, and a second bearing 14 is sleeved on the hinge shaft 13. The rotating wheel 10 is sleeved on the second bearing 14. The hinge shaft 13 can play a role in reversing direction and facilitates the installation of the second bearing 14 and the rotating wheel 10. Furthermore, the use of the second bearing 14 can reduce friction and prevent the lever 6 from swinging due to friction.
[0021] The alarm device 2 uses at least one of an electric bell or an indicator light. Using an electric bell or an indicator light can provide timely alarm prompts.
Claims
1. A paper-plastic bag twin detection device, comprising a frame (1), an alarm device (2), and a control circuit, characterized in that: The frame (1) is provided with a rotating shaft (3), an encoder (4), a swing arm (5), and a lever (6) for driving the swing arm (5) to rotate. The encoder (4) is electrically connected to the control circuit. One end of the swing arm (5) is set on the rotating shaft (3) and rotates synchronously with it. A gear (7) is sleeved on the input end of the encoder (4). An arc rack (8) is set on the other end of the swing arm (5). The arc rack (8) meshes with the gear (7). The frame (1) is also provided with an elastic reset member (9) for driving the swing arm (5) to swing and then reset. One end of the lever (6) is set on the rotating shaft (3) and rotates synchronously with it. A rotating wheel (10) is connected to the other end. The rotating wheel (10) is rotatably set on the lever (6).
2. A paper-plastic bag twin detection device according to claim 1, characterized in that: A first bearing (11) is provided on the frame (1) at the position corresponding to the rotating shaft (3), and the rotating shaft (3) passes through the first bearing (11).
3. A device for detecting paper-plastic bag twins according to claim 1 or 2, characterized in that: The frame (1) is provided with blocking members (12) on both sides opposite to the swing arm (5) to limit the swing angle of the swing arm (5). The elastic reset member (9) is a tension spring. The tension spring pulls the swing arm (5) against one of the blocking members (12) so that the lever (6) swings to form the rotating wheel (10) in a suspended state.
4. A twin paper-plastic bag detection device according to claim 3, characterized in that: The lever (6) is horizontally provided with a hinge shaft (13), and a second bearing (14) is sleeved on the hinge shaft (13). The rotating wheel (10) is sleeved on the second bearing (14).
5. A paper-plastic bag twin detection apparatus according to claim 3, characterized in that: The alarm device (2) adopts at least one of an electric bell or an indicator light.