Plastic film crack detection device

Abstract

The utility model discloses a plastic film crack detection device, which relates to the technical field of plastic film crack detection and comprises a working table, a first support plate fixedly connected to the upper surface of the left side of the working table, a fixing frame fixedly connected to the upper surface of the middle of the working table, and a mounting box fixedly connected to the inner top surface of the fixing frame. The inner top surface of the groove is fixedly connected with a spring, the other end of the spring is fixedly connected with a top block, the inner side surface of the groove is provided with a limiting chute, the side surface of the top block is fixedly connected with a limiting block, the lower surface of the limiting block is provided with a contact, and the lower end surface of the limiting chute is provided with a contact; according to the thin film crack detection device, through the arrangement of the mounting box, the hydraulic telescopic cylinder, the lifting block, the limiting roller, the detection wheel, a contact, a contact point, a controller and an alarm, the purpose of better detecting cracks in a thin film is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic film crack detection, in particular to a plastic film crack detection device. Background Technique

[0002] Plastic films are made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins, and are used for packaging and as a lamination layer. The share of plastic packaging and plastic packaging products in the market is increasing, especially composite plastic flexible packaging, which has been widely used in the fields of food, medicine, chemical industry, etc. Among them, food packaging accounts for the largest proportion, such as beverage packaging, frozen food packaging, cooked food packaging, fast food packaging, etc. These products have brought great convenience to people's lives.

[0003] A plastic film crack detection device disclosed in the Chinese Utility Model Patent Application Publication Specification CN216484685U. Although the utility model can make the detection and feeding of the plastic film simple and convenient through the set feeding component, and through the set feeding roller and auxiliary roller, the feeding and conveying of the plastic film can be simple and convenient. The overall structure is simple and easy to use, with high practicability. Through the set detection components arranged symmetrically up and down, the front and back sides of the plastic film can be detected by the detection components, making the overall detection efficiency and detection quality relatively high. Through the set light strip, relative illumination can be provided, making the detection effect of the infrared detector better. However, due to the thin and transparent nature of the plastic film, when detected by the infrared detector, it is easy to have the situation of mis-picking and missed detection. In order to improve the detection accuracy, there is an urgent need for a plastic film crack detection device. Content of the Utility Model

[0004] (I) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a plastic film crack detection device, which solves the problems put forward in the above background technique.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the utility model is realized by the following technical solutions: A plastic film crack detection device includes a workbench. On the upper surface of the left side of the workbench, a first support plate is fixedly connected. The inner side surface of the first support plate is rotatably connected with a conveying roller through a bearing. The surface of the conveying roller passes through the film body. On the upper surface of the middle part of the workbench, a fixing frame is fixedly connected. On the inner top surface of the fixing frame, an installation box is fixedly connected. Inside the installation box, a hydraulic telescopic cylinder is installed. The telescopic end of the hydraulic telescopic cylinder is fixedly connected with a lifting block. On both sides of the lower surface of the lifting block, first mounting plates are fixedly connected. The inner side surfaces of the first mounting plates are rotatably connected with a first rotating shaft through bearings. On the surface of the first rotating shaft, a limiting roller is fixedly connected. On the lower surface of the middle part of the lifting block, a fixing block is fixedly connected. On the lower surface of the fixing block, a groove is opened. On the inner top surface of the groove, a spring is fixedly connected. The other end of the spring is fixedly connected with a top block. On the inner side surface of the groove, a limiting sliding groove is opened. On the side surface of the top block, a limiting block is fixedly connected. On the lower surface of the limiting block, a contact is installed. On the lower end surface of the limiting sliding groove, a contact point is installed. On the lower surface of the top block, a second mounting plate is fixedly connected. The inner side surface of the second mounting plate is rotatably connected with a second rotating shaft through a bearing. On the outer surface of the second rotating shaft, a detection wheel is fixedly connected. On the upper surface of the left side of the workbench, a second support plate is fixedly connected. The inner side surface of the second support plate is rotatably connected with a winding wheel through a bearing.

[0008] Optionally, the number of the hydraulic telescopic cylinders is four, and they are distributed in a rectangular array.

[0009] Optionally, the number of the first mounting plates, the first rotating shafts and the limiting rollers is two, and they are symmetrically distributed on both sides of the fixing block.

[0010] Optionally, the positions of the contact and the contact point are in correspondence. On the front surface of the installation box, a controller is installed. On the front surface of the installation box, an alarm is installed. The contact and the contact point are arranged on the control circuit of the controller. The controller is electrically connected with the alarm through a wire.

[0011] Optionally, the number of the fixing blocks, the springs, the top blocks, the second mounting plates, the second rotating shafts, the detection wheels, the limiting blocks, the contacts and the contact points is several, and they are distributed side by side.

[0012] Optionally, the right end of the film body is wound on the winding wheel, and the limiting rollers and the detection wheels are abutted against the upper surface of the film body.

[0013] The utility model provides a plastic film crack detection device, which has the following beneficial effects:

[0014] 1. This plastic film crack detection device, through the settings of the installation box, hydraulic telescopic cylinder, lifting block, limiting roller, detection wheel, contact head, contact point, controller and alarm, enables the plastic film crack detection device to accurately detect cracks on the film surface. During use, the right end of the film body is wound around the surface of the winding wheel. The rotation of the winding wheel drives the film body to be wound. During the winding process, by controlling the length of the telescopic end of the hydraulic telescopic cylinder to move the lifting block up and down, the pressure of the limiting roller and the detection wheel on the film body is changed, thereby playing a role in adjusting the tension during the winding process of the film body. When the lifting block moves downward, the detection wheel first contacts the upper surface of the film body. The detection wheel is squeezed, causing the top block to slide upward in the groove. At the same time, the contact point slides upward in the limit chute, separating the contact head and the contact point. Since the contact head and the contact point are set on the control circuit of the controller, at this time, the controller controls the circuit for the controller to alarm and stop the device to be disconnected. As the lifting block moves downward, the limiting roller contacts the upper surface of the film body. Under the action of the two limiting rollers, the lower surfaces of the limiting roller and the detection wheel are at the same horizontal height. At this time, both the limiting roller and the detection wheel are in contact with the upper surface of the film body. The left side of the film body moves to the right through the conveying roller and is finally wound onto the surface of the winding wheel. During the winding process, when a crack appears on the surface of the film body, when the crack passes through one of the numerous detection wheels, when the crack passes through a certain detection wheel, the detection wheel, under the action of the spring, the spring releases elastic potential energy, and the top block slides out downward in the groove, driving the detection wheel to squeeze into the crack on the surface of the film body. At the same time, the limiting block on the side of the top block slides downward in the limit chute. As the top block slides out, the contact head on the lower surface of the limiting block contacts the contact point. At this time, the circuit for the controller to control the device to stop and the alarm to alarm is closed, causing the device to stop urgently, and at the same time, an automatic alarm is carried out through the alarm, thereby playing a role in automatically detecting whether there are cracks on the film and automatically alarming. Compared with infrared detection, it is not easy to have the situation of mis-picking and missed detection, achieving a better purpose of detecting cracks on the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0016] Figure 2 is a front-sectional structural schematic diagram of the present invention;

[0017] Figure 3 is of the present invention Figure 2 structural schematic diagram at A in;

[0018] Figure 4 is of the present invention Figure 3 structural schematic diagram at B in;

[0019] Figure 5This is a schematic structural diagram of the side view section of the fixed block of the present utility model.

[0020] In the figure: 1, workbench; 2, first support plate; 3, conveying roller; 4, film body; 5, fixing frame; 6, installation box; 7, hydraulic telescopic cylinder; 8, lifting block; 9, first mounting plate; 10, first rotating shaft; 11, limiting roller; 12, fixed block; 13, groove; 14, spring; 15, top block; 16, second mounting plate; 17, second rotating shaft; 18, detection wheel; 19, limiting chute; 20, limiting block; 21, contact; 22, contact point; 23, controller; 24, alarm; 25, second support plate; 26, winding wheel. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0022] Embodiment 1

[0023] Please refer to Figures 1 to 5, the present utility model provides a technical solution: a plastic film crack detection device, including a workbench 1. On the upper surface of the left side of the workbench 1, a first support plate 2 is fixedly connected. The inner side surface of the first support plate 2 is rotatably connected with a conveying roller 3 through a bearing. The surface of the conveying roller 3 passes through the film body 4. On the upper surface of the middle part of the workbench 1, a fixed frame 5 is fixedly connected. On the inner top surface of the fixed frame 5, an installation box 6 is fixedly connected. On the inner top surface of the installation box 6, a hydraulic telescopic cylinder 7 is installed. The number of the hydraulic telescopic cylinders 7 is four, and they are distributed in a rectangular array. The telescopic end of the hydraulic telescopic cylinder 7 is fixedly connected with a lifting block 8. On both sides of the lower surface of the lifting block 8, a first mounting plate 9 is fixedly connected. The inner side surface of the first mounting plate 9 is rotatably connected with a first rotating shaft 10 through a bearing. On the surface of the first rotating shaft 10, a limiting roller 11 is fixedly connected. In the middle of the lower surface of the lifting block 8, a fixed block 12 is fixedly connected. The number of the first mounting plates 9, the first rotating shafts 10, and the limiting rollers 11 is two, and they are symmetrically distributed on both sides of the fixed block 12. On the lower surface of the fixed block 12, a groove 13 is opened. On the inner top surface of the groove 13, a spring 14 is fixedly connected. The other end of the spring 14 is fixedly connected with a top block 15. On the inner side surface of the groove 13, a limiting chute 19 is opened. On the side surface of the top block 15, a limiting block 20 is fixedly connected. On the lower surface of the limiting block 20, a contact 21 is installed. On the lower end surface of the limiting chute 19, a contact point 22 is installed. The positions of the contact 21 and the contact point 22 are in correspondence. On the front surface of the installation box 6, a controller 23 is installed. On the front surface of the installation box 6, an alarm 24 is installed. The contact 21 and the contact point 22 are arranged on the control circuit of the controller 23. The controller 23 is electrically connected with the alarm 24 through a wire. On the lower surface of the top block 15, a second mounting plate 16 is fixedly connected. The inner side surface of the second rotating shaft 17 is rotatably connected with a second rotating shaft 17 through a bearing. On the outer surface of the second rotating shaft 17, a detection wheel 18 is fixedly connected. On the upper surface of the left side of the workbench 1, a second support plate 25 is fixedly connected. The inner side surface of the second support plate 25 is rotatably connected with a winding wheel 26 through a bearing. The number of the fixed blocks 12, the springs 14, the top blocks 15, the second mounting plates 16, the second rotating shafts 17, the detection wheels 18, the limiting blocks 20, the contacts 21, and the contact points 22 is several, and they are arranged side by side. The right end of the film body 4 is wound on the winding wheel 26. The limiting rollers 11 and the detection wheels 18 are in contact with the upper surface of the film body 4.

[0024] In order to achieve the purpose of better detecting cracks on the film, during use, through the settings of the installation box 6, hydraulic telescopic cylinder 7, lifting block 8, limiting roller 11, detection wheel 18, contact 21, contact point 22, controller 23 and alarm 24, the plastic film crack detection device has the effect of accurately detecting cracks on the film surface. During use, the right end of the film body 4 is wound around the surface of the winding wheel 26. By the rotation of the winding wheel 26, the film body 4 is wound. During the winding process, by controlling the length of the telescopic end of the hydraulic telescopic cylinder 7 to extend, the lifting block 8 moves up and down, changing the pressure of the limiting roller 11 and the detection wheel 18 on the film body 4, thereby playing a role in adjusting the tension during the winding process of the film body 4. When the lifting block 8 moves downward, the detection wheel 18 first contacts the upper surface of the film body 4. The detection wheel 18 is squeezed, causing the top block 15 to slide upward in the groove 13. At the same time, the contact point 22 slides upward in the limit chute 19, separating the contact 21 and the contact point 22. Since the contact 21 and the contact point 22 are arranged on the control circuit of the controller 23, at this time, the circuit for the controller 23 to control the alarm of the controller 23 and stop the device is disconnected. As the lifting block 8 moves downward, the limiting roller 11 contacts the upper surface of the film body 4. Under the action of the two limiting rollers 11, the lower surfaces of the limiting roller 11 and the detection wheel 18 are at the same horizontal height. At this time, both the limiting roller 11 and the detection wheel 18 are in contact with the upper surface of the film body 4. The left side of the film body 4 moves to the right through the conveying roller 3 and is finally wound onto the surface of the winding wheel 26. During the winding process, when a crack appears on the surface of the film body 4, when the crack passes through one of the numerous detection wheels 18, when the crack passes through a certain detection wheel 18, under the action of the spring 14, the spring 14 releases elastic potential energy, and the top block 15 slides downward out of the groove 13, driving the detection wheel 18 to squeeze into the crack on the surface of the film body 4. At the same time, the limiting block 20 on the side of the top block 15 slides downward in the limit chute 19. As the top block 15 slides out, the contact 21 on the lower surface of the limiting block 20 contacts the contact point 22. At this time, the circuit for the controller 23 to control the stop of the device and the alarm of the alarm 24 is closed, causing the device to stop urgently, and at the same time, an automatic alarm is carried out through the alarm 24, thereby playing a role in automatically detecting whether there are cracks on the film and automatically alarming. Compared with infrared detection, it is not easy to have the situation of mis-picking and missed detection, achieving the purpose of better detecting cracks on the film.

[0025] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A plastic film crack detection device, comprising a workbench (1), characterized in that: On the upper surface of the left side of the workbench (1), a first support plate (2) is fixedly connected. The inner side surface of the first support plate (2) is rotatably connected with a conveying roller (3) through a bearing. The surface of the conveying roller (3) passes through the film body (4). On the upper surface of the middle part of the workbench (1), a fixing frame (5) is fixedly connected. The inner top surface of the fixing frame (5) is fixedly connected with an installation box (6). A hydraulic telescopic cylinder (7) is installed on the inner top surface of the installation box (6). The telescopic end of the hydraulic telescopic cylinder (7) is fixedly connected with a lifting block (8). On both sides of the lower surface of the lifting block (8), first mounting plates (9) are fixedly connected. The inner side surface of the first mounting plate (9) is rotatably connected with a first rotating shaft (10) through a bearing. A limiting roller (11) is fixedly connected to the surface of the first rotating shaft (10). A fixing block (12) is fixedly connected to the lower surface of the middle part of the lifting block (8). A groove (13) is formed on the lower surface of the fixing block (12). A spring (14) is fixedly connected to the inner top surface of the groove (13). The other end of the spring (14) is fixedly connected with a top block (15). A limiting chute (19) is formed on the inner side surface of the groove (13). A limiting block (20) is fixedly connected to the side surface of the top block (15). A contact (21) is installed on the lower surface of the limiting block (20). A contact point (22) is installed on the lower end surface of the limiting chute (19). A second mounting plate (16) is fixedly connected to the lower surface of the top block (15). A second rotating shaft (17) is rotatably connected to the inner side surface through a bearing. A detection wheel (18) is fixedly connected to the outer surface of the second rotating shaft (17). On the upper surface of the left side of the workbench (1), a second support plate (25) is fixedly connected. The inner side surface of the second support plate (25) is rotatably connected with a winding wheel (26) through a bearing.

2. The plastic film crack detection device according to claim 1, characterized in that: The number of the hydraulic telescopic cylinders (7) is four, and they are distributed in a rectangular array.

3. The plastic film crack detection device according to claim 1, characterized in that: The number of the first mounting plates (9), the first rotating shafts (10) and the limiting rollers (11) is two, and they are symmetrically distributed on both sides of the fixing block (12).

4. The plastic film crack detection device according to claim 1, characterized in that: The positions of the contact (21) and the contact point (22) are in correspondence. A controller (23) is installed on the front surface of the installation box (6). An alarm (24) is installed on the front surface of the installation box (6). The contact (21) and the contact point (22) are arranged on the control circuit of the controller (23). The controller (23) is electrically connected to the alarm (24) through a wire.

5. A plastic film crack detection device according to claim 1, characterized in that: The number of the fixing block (12), the spring (14), the top block (15), the second mounting plate (16), the second rotating shaft (17), the detection wheel (18), the limiting block (20), the contact (21) and the contact point (22) is several, and they are arranged side by side.

6. The plastic film crack detection device according to claim 1, characterized in that: The right end of the film body (4) is wound on the winding wheel (26). The limiting rollers (11) and the detection wheels (18) are abutted against the upper surface of the film body (4).

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