Mask earloop tensile force detection system and detection method

Abstract

The present invention relates to a mask earloop tensile force detection system and a detection method. The detection system includes a frame; a conveying mechanism, a synchronous clamping mechanism, a tensile force detection mechanism and a sorting mechanism controlled by a controller are arranged on the frame; the conveying mechanism includes a hanging body that can convey the mask hung thereon forward under the drive of a first driving device; the synchronous clamping mechanism includes a clamping part arranged below the hanging body and used for clamping the mask body; the clamping part makes the clamped mask body move synchronously with the earloop on the hanging body under the drive of a second driving device; the tensile force detection mechanism includes a tensile force device for applying a set tensile force; the tensile force working end of the tensile force device is connected to the synchronous clamping mechanism and used for pulling the synchronous clamping mechanism; a sorting mechanism for sorting according to the detection result is arranged at the discharge end of the conveying mechanism. The present invention can be connected to a mask production line to perform tensile force detection on all passing products in a set detection section.

Description

Technical Field

[0001] The present invention relates to the field of designing mask production detection equipment, and particularly relates to a mask earloop tensile force detection system and a detection method. Background Art

[0002] During the mask production process, it is necessary to detect the solder joint strength of the mask earloops. The existing detection of the solder joint strength of the mask earloops is achieved through tensile force detection. Usually, it relies on manual sampling inspection. One end of the mask is manually fixed, and weights are suspended at one end of the earloop for detection. The manual sampling inspection process requires a large amount of labor, and the detection speed is slow, the detection quality fluctuates greatly, and full inspection cannot be achieved. Summary of the Invention

[0003] The first object of the present invention is to provide an automatic mask earloop tensile force detection system, which can be connected to the mask production line, receive mask products from the sorting mechanism of the production line, and perform tensile force detection on all passing mask products in the set detection section. This system does not require manual intervention, has a high degree of automation, and can achieve the purpose of full inspection of mask products.

[0004] The technical solution for achieving the second object of the present invention is as follows: The mask earloop tensile force detection system in the present invention includes a frame; a conveying mechanism, a synchronous clamping mechanism, a tensile force detection mechanism, and a sorting mechanism controlled by a controller are provided on the frame; the conveying mechanism includes a hanging body that can be driven by a first driving device to convey the mask hung thereon forward; a card slot for hanging the earloop of the mask is provided on the hanging body; the synchronous clamping mechanism includes a clamping portion provided below the hanging body and used for clamping the mask body; the clamping portion makes the clamped mask body move synchronously with the earloop on the hanging body under the drive of a second driving device; the tensile force detection mechanism includes a tensile force device for applying a set tensile force; the tensile force working end of the tensile force device is connected to the synchronous clamping mechanism and is used to pull the synchronous clamping mechanism; a sorting mechanism for sorting according to the detection result is provided at the discharge end of the conveying mechanism.

[0005] As a preferred design, the hanging body is a conveying lead screw; the conveying lead screw is rotatably arranged on the machine frame through an open support and rotates under the drive of a first driving device; one end of the conveying lead screw is the feeding end of the conveying mechanism, and the other end is the discharging end of the conveying mechanism; the thread groove of the conveying lead screw is the clamping groove; at least two rotating connection parts are arranged along the axial direction of the conveying lead screw; each rotating connection part corresponds to an open support; the open support is fixedly connected to the machine frame; an open hole is arranged on the open support; the rotating connection part is rotatably arranged in the open hole; at least the thread diameter of the rotating connection part is smaller than the thread diameter of the part that is not the rotating connection part, and the diameter of the open hole is smaller than the thread diameter of the part that is not the rotating connection part; at least two of the open supports axially limit the conveying lead screw; the opening of the open hole is located directly below and allows the hanging ear wire to pass through.

[0006] As an optimized design, the conveying lead screw is in a dumbbell shape with large diameters at both ends and a small diameter in the middle; the two ends of the part with a small diameter in the middle of the conveying lead screw are rotating connection parts; two open supports are arranged on the machine frame; the two open supports are respectively rotatably connected to the corresponding rotating connection parts; the open support is fixedly connected to the machine frame; an open hole is arranged on the open support; the conveying lead screw is rotatably arranged in the open hole; the diameter of the open hole is smaller than the diameters at both ends of the conveying lead screw; the opening of the open hole is located directly below and allows the hanging ear wire to pass through.

[0007] One end of the conveying lead screw as the feeding end of the conveying mechanism is provided with a guiding device for guiding the hanging ear wire into the thread groove; the guiding device includes a guiding slideway, a sleeve and an anti-overturning gravity weight; the sleeve is rotatably arranged at one end of the conveying lead screw as the feeding end of the conveying mechanism; the guiding slideway and the anti-overturning gravity weight are oppositely arranged on the side wall of the sleeve; the anti-overturning gravity weight is heavier than the guiding slideway; the guiding slideway is used for guiding the hanging ear wire to enter the thread groove along it.

[0008] Meanwhile, there is also a visual inspection mechanism for detecting the appearance of the mask body; the visual inspection mechanism includes two industrial cameras arranged oppositely and fixedly installed on the machine frame; the two industrial cameras are arranged between the discharging end of the conveying mechanism and the synchronous clamping mechanism; the industrial camera is used for photographing the mask body passing by.

[0009] The above sorting mechanism includes a first slideway and a second slideway; the first slideway is arranged on the machine frame, and the feeding end of the first slideway corresponds to the discharging end of the conveying mechanism; the second slideway is fixedly connected to the synchronous clamping mechanism and corresponds to the discharging end of the synchronous clamping mechanism.

[0010] As an optimized design, the above first slideway is arranged on the machine frame through a rotary driving device, and the discharging end of the first slideway displaces under the drive of the rotary driving device, and the feeding end of the first slideway always corresponds to the discharging end of the conveying mechanism.

[0011] The above-mentioned first driving device includes a first driving motor; the first driving motor is fixed on the machine frame; a driving friction wheel is rotatably provided on the machine frame; the output shaft of the first driving motor is in transmission connection with the driving friction wheel; a static friction is formed between the driving friction wheel and the large-diameter surface of the conveying lead screw.

[0012] The above-mentioned clamping part includes two rows of guide wheel groups arranged in parallel; each row of guide wheel groups includes a plurality of guide wheels arranged at intervals along the conveying direction; the guide wheels of the two rows of guide wheel groups are arranged in a staggered manner, and the guide wheels of the two rows of guide wheel groups form a wavy clamping channel through which the cover body can pass and clamp the cover body; the second driving device includes a second driving motor and driving gears arranged on each guide wheel; the driving gears on each guide wheel cooperate with each other in transmission, and the output shaft of the second driving motor is in transmission cooperation with the driving gear of one of the guide wheels.

[0013] As a deformation design, the above-mentioned clamping part includes two conveyor belts arranged opposite to each other; the conveyor belts are arranged along the conveying direction; a clamping part for clamping the cover body is formed between the opposite planes of the two conveyor belts; the second driving device includes a second driving motor for driving the two conveyor belts.

[0014] Two symmetrically arranged and extending along the conveying direction hanging ear wire guiding plates are further provided on the above-mentioned machine frame; the two hanging ear wire guiding plates are located on both sides of the hanging body; a guiding part that opens outward is provided at the feeding end of the hanging ear wire guiding plate located on the conveying mechanism.

[0015] The above-mentioned rotary driving device includes a rotating rod and an electric pull rod; the upper end and the lower end of the rotating rod are respectively rotationally connected to the feeding end of the first slideway and the machine frame; the discharging end of the first slideway is rotationally connected to the output end of the electric pull rod.

[0016] A proximity sensor for sensing that the mask reaches the tension detection position is further provided on the above-mentioned synchronous clamping mechanism; the proximity sensor transmits the sensing signal to the controller.

[0017] The above-mentioned tension device includes a tension sensor, a ball screw lift, a servo motor and a reduction box; the servo motor, the reduction box and the ball screw lift are all fixedly installed on the machine frame; the lifting end of the ball screw lift is connected to the synchronous clamping mechanism through the tension sensor; the output shaft of the servo motor is in transmission cooperation with the input end of the reduction box, and the output end of the reduction box is in transmission cooperation with the input end of the ball screw lift; the tension sensor and the servo motor are both electrically connected to the controller.

[0018] The second object of the present invention is to provide an automatic detection method for detecting the mask earloop tension and the appearance by using the above-mentioned mask earloop tension detection system. This method can achieve full inspection of products and can be used in cooperation with the mask production line, greatly improving the production efficiency and production quality.

[0019] The technical solution for achieving the second object of the present invention is as follows: In the method for detecting the tensile force of the ear loops of a mask in the present invention, the following steps are included:

[0020] S1. The conveying mechanism continuously receives the masks to be inspected. The masks to be inspected are hung on the corresponding card slots on the hanging body through the ear loops to complete the hanging on the hanging body; the first driving device drives the hanging body to continuously convey the masks to be inspected forward;

[0021] S2. Under the conveyance of the conveying mechanism, the mask body of the mask to be inspected enters the synchronous clamping mechanism; the synchronous clamping mechanism clamps the mask body;

[0022] S3. After the synchronous clamping mechanism clamps the mask body, the tensile force device pulls the synchronous clamping mechanism downward according to the set tensile force and maintains it until the next cycle; the controller determines whether it is completely broken, not completely broken or not broken according to the tensile force change sensed by the tensile force device;

[0023] S4. If the ear loop is completely broken, then when the mask body leaves the synchronous clamping mechanism, it will fall into the second slideway; if the ear loop is not completely broken or not broken, the mask will fall from the discharge end of the conveying mechanism into the first slideway.

[0024] As an optimized design, the detection method in the present invention includes the following steps:

[0025] S1. The conveying mechanism continuously receives the masks to be inspected. The masks to be inspected are hung on the corresponding card slots on the hanging body through the ear loops to complete the hanging on the hanging body; the first driving device drives the hanging body to continuously convey the masks to be inspected forward;

[0026] S2. Under the conveyance of the conveying mechanism, the mask body of the mask to be inspected enters the synchronous clamping mechanism; the synchronous clamping mechanism clamps the mask body;

[0027] S3. After the synchronous clamping mechanism clamps the mask body, the tensile force device pulls the synchronous clamping mechanism downward according to the set tensile force and maintains it until the next cycle; the controller determines whether it is completely broken, not completely broken or not broken according to the tensile force change sensed by the tensile force device;

[0028] S4. If the ear loop is completely broken, then when the mask body leaves the synchronous clamping mechanism, it will fall into the second slideway; if the ear loop is not completely broken or not broken, the mask will continue to move forward under the conveyance of the conveying mechanism;

[0029] S5. An industrial camera takes pictures of the masks with the ear loops not completely broken or intact, and the masks continue to move forward after the shooting; the controller determines whether they are intact according to the pictures taken by the industrial camera;

[0030] S6. Before the mask with the ear loop not completely broken, not broken or intact falls from the discharge end of the conveying mechanism, the rotary drive device selects whether to drive the discharge end of the first slide to displace according to the system determination result; if it is determined that it is not completely broken and not intact, the discharge end of the first slide is displaced by the rotary drive device; if it is determined that it is not broken and intact, the discharge end of the first slide does not displace.

[0031] The present invention has positive effects: (1) The present invention can continuously receive masks from the mask production line through the conveying mechanism, and at the same time, through the synchronous clamping mechanism and the waste detection mechanism, it can perform tensile tests synchronously during the mask conveying process, thus providing necessary conditions for the automatic full inspection of the ear loops of masks; through the coordinated work of the above mechanisms, the tensile detection efficiency of the ear loops can be greatly improved, and the working intensity can be effectively reduced.

[0032] (2) In the present invention, the hanging body adopts a transmission lead screw, and uses its thread groove to achieve the purpose of continuous conveying. Its transmission speed is constant and controllable, which is convenient for precise control; at the same time, as the transmission lead screw rotates, the ear loops of the mask can automatically enter its thread groove, playing a role in sorting.

[0033] (3) In the present invention, the transmission lead screw is rotatably connected to the frame through an open support, which can not only ensure the rotation of the transmission lead screw, but also ensure the smooth passage of the ear loop. The design is ingenious.

[0034] (4) In the present invention, the cooperation between the transmission lead screw and the open support through the rotating connection part can effectively prevent the axial movement of the transmission lead screw, which is beneficial to ensuring the stable conveying of the conveying mechanism.

[0035] (5) Through the guiding device in the present invention, the guiding slide can always be in a fixed position during the rotation of the transmission lead screw (using the principle of gravity and under the action of the anti-overturning gravity weight), which is beneficial to the acceptance and guiding of the mask.

[0036] (6) Through the visual inspection mechanism in the present invention, the appearance of the mask body can also be detected, thus further improving the detection efficiency and detection effect.

[0037] (7) Through the sorting mechanism in the present invention, automatic screening of qualified products and unqualified products can be realized, thus further improving the production efficiency.

[0038] (8) The design method of the first drive device in the present invention can also ensure the smooth conveying of the ear loop in the thread groove.

[0039] (9) In the synchronous clamping mechanism of the present invention, the clamping part adopts two groups of guide wheel sets, and the clamping effect is achieved by changing the movement route of the mask body; at the same time, the synchronous clamping mechanism in the present invention can achieve the effect of no breakpoint (i.e., continuous clamping), which is beneficial to improving the detection efficiency.

[0040] (10) In the present invention, the clamping part in the non-clamping communication mechanism adopts two relatively arranged conveyor belts, and the conveyor belts continuously clamp the cover body, which is beneficial to improving the detection efficiency.

[0041] (11) Through the ear loop wire guiding plate of the present invention, the cover body can be effectively guided into the synchronous clamping mechanism to achieve a sorting effect, providing effective assistance for subsequent tensile force detection.

[0042] (12) Through the rotary drive device of the present invention, the sorting types can be further increased, that is, products with unbroken ear loop wires but unqualified cover body appearance, products with incomplete breaks, and qualified products can be sorted according to the detection results.

[0043] (13) Through the proximity sensor of the present invention, a release working signal can be given to the tensile force detection mechanism to meet the requirements of automated detection.

[0044] (14) The detection method in the present invention has a high degree of automation, many detection items, and good sorting effect. Description of the Drawings

[0045] In order to make the content of the present invention easier to be clearly understood, the following further details the present invention according to specific embodiments in conjunction with the drawings, where

[0046] Figure 1 is the axonometric view of the mask ear loop wire tensile force detection system in the present invention;

[0047] Figure 2 is the front view of the mask ear loop wire tensile force detection system in the present invention;

[0048] Figure 3 is the rear axonometric view of the mask ear loop wire tensile force detection system in the present invention;

[0049] Figure 4 is the structural schematic diagram of the conveying mechanism in the present invention;

[0050] Figure 5 is the front view of the conveying mechanism in the present invention;

[0051] Figure 6 is the side view of the conveying mechanism in the present invention;

[0052] Figure 7 is the electrical connection schematic diagram of the present invention;

[0053] Figure 8 is the structural schematic diagram of the clamping part in Embodiment 1 of the present invention;

[0054] Figure 9 is the structural schematic diagram of the clamping part in Embodiment 2 of the present invention. Detailed implementation mode

[0055] (Embodiment 1)

[0056] See Figures 1 to 8 , in the mask earloop tensile force detection system of the present invention, it includes a frame 1; a conveying mechanism 2, a synchronous clamping mechanism 3, a tensile force detection mechanism 4 and a sorting mechanism 5 controlled by a controller are arranged on the frame 1; the conveying mechanism 2 includes a hanging body 22 that can convey the mask hung thereon forward under the drive of a first driving device 21; the hanging body 22 is a conveying lead screw; the conveying lead screw is rotatably arranged on the frame 1 through an open support 23 and rotates under the drive of the first driving device 21; one end of the conveying lead screw is the feeding end of the conveying mechanism 2, and the other end is the discharging end of the conveying mechanism 2; the thread groove of the conveying lead screw serves as a card slot for hanging the earloop of the mask; when the conveying lead screw rotates, the thread groove will continuously convey the mask forward.

[0057] The conveying lead screw is in a dumbbell shape with large diameters at both ends and a small diameter in the middle; both ends of the part with a small diameter in the middle of the conveying lead screw are rotation connection parts; two open supports 23 are arranged on the frame 1; the two open supports 23 are respectively rotationally connected to the corresponding rotation connection parts; the open support 23 is fixedly connected to the frame 1; an open hole is arranged on the open support 23; the conveying lead screw is rotatably arranged in the open hole; the diameter of the open hole is smaller than the diameters of both ends of the conveying lead screw; the opening of the open hole is located directly below and allows the earloop to pass through.

[0058] The first driving device 21 includes a first driving motor 211; the first driving motor 211 is fixed on the frame 1; a driving friction wheel 212 is rotatably arranged on the frame 1; the output shaft of the first driving motor 211 is in transmission connection with the driving friction wheel 212 through a belt; the driving friction wheel 212 forms a static friction with the large-diameter surface of the conveying lead screw. The first driving motor 211 is electrically connected to the controller.

[0059] The synchronous clamping mechanism 3 includes a clamping part 31 arranged below the hanging body 22 and used for clamping the mask body; the clamping part 31 makes the clamped mask body move synchronously with the earloop on the hanging body 22 under the drive of a second driving device; the tensile force detection mechanism 4 includes a tensile force device for applying a set tensile force; the tensile force working end of the tensile force device is connected to the synchronous clamping mechanism 3 and is used for pulling the synchronous clamping mechanism 3; a sorting mechanism 5 for sorting according to the detection result is arranged at the discharging end of the conveying mechanism 2.

[0060] One end of the conveying lead screw, which is the feeding end of the conveying mechanism 2, is provided with a guiding device 6 for guiding the hanging ear line into the thread groove; the guiding device 6 includes a guiding slideway 61, a sleeve 62 and an anti-overturning gravity weight 63; the sleeve 62 is rotatably arranged at one end of the conveying lead screw, which is the feeding end of the conveying mechanism 2; the guiding slideway 61 and the anti-overturning gravity weight 63 are oppositely arranged on the side wall of the sleeve 62; the anti-overturning gravity weight 63 is heavier than the guiding slideway 61; the guiding slideway 61 is used for guiding the hanging ear line to enter the thread groove along it.

[0061] At the same time, there is also a visual inspection mechanism 7 for detecting the appearance of the mask body; the visual inspection mechanism 7 includes two industrial cameras arranged oppositely and fixedly installed on the frame 1; the two industrial cameras are arranged between the discharging end of the conveying mechanism 2 and the synchronous clamping mechanism 3; the industrial cameras are used for photographing the mask body passing by. The industrial cameras are electrically connected to the controller.

[0062] The sorting mechanism 5 includes a first slideway 51 and a second slideway 52; the second slideway 52 is fixedly connected to the synchronous clamping mechanism 3 and corresponds to the discharging end of the synchronous clamping mechanism 3; the first slideway 51 is arranged on the frame 1 through a rotary driving device 53, and the discharging end of the first slideway 51 is displaced under the drive of the rotary driving device 53, and the feeding end of the first slideway 51 always corresponds to the discharging end of the conveying mechanism 2.

[0063] The clamping part 31 includes two rows of guide wheel groups 311 arranged in parallel; each row of guide wheel groups 311 includes a plurality of guide wheels arranged at intervals along the conveying direction; the second driving device includes a second driving motor and driving gears arranged on each guide wheel; the guide wheels are rotatably arranged on the mounting frame 32, the second driving motor is fixedly connected to the mounting frame 32, the upper parts of each guide wheel are used for clamping the mask body, driving gears are arranged at the lower parts of each guide wheel, the driving gears on each guide wheel are meshed and driven with each other, and the output shaft of the second driving motor is meshed and driven with the driving gear of one of the guide wheels. The guide wheels of the two rows of guide wheel groups 311 are arranged staggeredly, and the upper parts of the guide wheels of the two rows of guide wheel groups 311 form a wavy clamping channel through which the mask body can pass and the mask body is clamped; the second driving motor is electrically connected to the controller.

[0064] Two symmetrically arranged hanging ear line guiding plates 8 extending along the conveying direction are further arranged on the frame 1; the two hanging ear line guiding plates 8 are located on both sides of the hanging body 22; the hanging ear line guiding plates 8 are provided with guiding parts that open outwards at the feeding end of the conveying mechanism 2.

[0065] The rotary driving device 53 includes a rotating rod 531 and an electric pull rod 532; the upper end and the lower end of the rotating rod 531 are respectively rotationally connected to the feeding end of the first slideway 51 and the frame 1; the discharging end of the first slideway 51 is rotationally connected to the output end of the electric pull rod 532. The electric pull rod 532 is electrically connected to the controller.

[0066] The pulling device includes a pulling force sensor 41, a ball screw lift 42, a servo motor 43 and a reduction gearbox; the servo motor, the reduction gearbox and the ball screw lift are all fixedly installed on the frame 1; the lifting end of the ball screw lift is connected to the mounting bracket 32 of the synchronous clamping mechanism 3 through the pulling force sensor; the output shaft of the servo motor is in transmission cooperation with the input end of the reduction gearbox, and the output end of the reduction gearbox is in transmission cooperation with the input end of the ball screw lift; the pulling force sensor and the servo motor are both electrically connected to the controller.

[0067] The synchronous clamping mechanism 3 is further provided with a proximity sensor 9 for sensing that the mask reaches the pulling force detection position; the proximity sensor 9 is electrically connected to the controller.

[0068] The detection method of the mask earloop pulling force detection system of the present invention includes the following steps:

[0069] S1. The conveying mechanism 2 continuously receives the masks to be detected, and the masks to be detected are hung on the corresponding card slots on the hanging body 22 through the earloops to complete the hanging on the hanging body 22; the first driving device 21 drives the hanging body 22 to continuously convey the masks to be detected forward;

[0070] S2. Under the conveyance of the conveying mechanism 2, the mask body of the mask to be detected enters the synchronous clamping mechanism 3, and the synchronous clamping mechanism 3 clamps the mask body; at the same time, when the mask passes by the proximity sensor 9, the proximity sensor 9 will send the sensed signal to the controller;

[0071] S3. After the synchronous clamping mechanism 3 clamps the mask body, the controller controls the pulling device to pull the synchronous clamping mechanism 3 downward according to the set pulling force and maintain it until the next cycle; the controller determines whether it is completely broken, not completely broken or not broken according to the change of the pulling force sensed by the pulling device;

[0072] S4. If the earloop is completely broken, when the mask body leaves the synchronous clamping mechanism 3, it will fall into the second chute 52; if the earloop is not completely broken or not broken, the mask will continue to move forward under the conveyance of the conveying mechanism 2;

[0073] S5. The industrial camera takes pictures of the masks with the earloops not completely broken or intact, and the masks continue to move forward after the shooting is completed; the controller judges whether it is intact according to the pictures taken by the industrial camera;

[0074] S6. Before the masks with the earloops not completely broken, not broken or intact fall from the discharge end of the conveying mechanism 2, the rotary driving device 53 selects whether to drive the discharge end of the first chute 51 to displace according to the system determination result; if it is determined that it is not completely broken and not intact, the discharge end of the first chute 51 is displaced by the rotary driving device 53; if it is determined that it is not broken and intact, the discharge end of the first chute 51 does not displace.

[0075] (Example 2)

[0076] See Figure 9 , in the present invention, the clamping portion 31 includes two conveyor belts 312 arranged oppositely; the conveyor belts 312 are arranged along the conveying direction; the conveyor belts 312 are arranged on the mounting frame 32, and a clamping portion 31 for clamping the cover body is formed between the opposite planes of the two conveyor belts 312; the second driving device is a second driving motor; the second driving motor is fixedly connected to the mounting frame 32, and the output end of the second driving motor is simultaneously connected to the input ends of the two conveyor belts 312 through a speed reducer. Of course, the output end of the second driving motor can also be connected to the input end of one of the conveyor belts 312 through a speed reducer, and the input end or the output end of this conveyor belt 312 is connected to the input end of the other conveyor belt 312. The two conveyor belts 312 move synchronously.

[0077] Other technical features are the same as those in Example 1.

[0078] The specific embodiments described above further elaborate on the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A mask earloop tensile force detection system, characterized in that: It includes a frame (1); a conveying mechanism (2), a synchronous clamping mechanism (3), a tensile force detection mechanism (4), and a sorting mechanism (5) controlled by a controller are provided on the frame (1); the conveying mechanism (2) includes a hanging body (22) that can convey the masks hung thereon forward under the drive of a first driving device (21); a card slot for hanging the ear loops of the masks is provided on the hanging body (22); the synchronous clamping mechanism (3) includes a clamping part (31) arranged below the hanging body (22) and used for clamping the mask body; the clamping part (31) makes the clamped mask body move synchronously with the ear loops on the hanging body (22) under the drive of a second driving device; the tensile force detection mechanism (4) includes a tensile force device for applying a set tensile force; the tensile force working end of the tensile force device is connected to the synchronous clamping mechanism (3) and used for pulling the synchronous clamping mechanism (3); a sorting mechanism (5) for sorting according to the detection result is provided at the discharge end of the conveying mechanism (2). The hanging body (22) is a transmission screw rod; the transmission screw rod is rotatably arranged on the frame (1) through an open support (23) and rotates under the drive of the first driving device (21); one end of the transmission screw rod is the feed end of the conveying mechanism (2), and the other end is the discharge end of the conveying mechanism (2); the thread groove of the transmission screw rod is the card slot; at least two rotating connection parts are arranged on the transmission screw rod along its axial direction; each rotating connection part corresponds to an open support (23); the open support (23) is fixedly connected to the frame (1); an open hole is provided on the open support (23); the rotating connection part is rotatably arranged in the open hole; at least the thread diameter of the rotating connection part is smaller than the thread diameter of the part that is not the rotating connection part, and the diameter of the open hole is smaller than the thread diameter of the part that is not the rotating connection part; at least two of the open supports (23) form an axial limit for the transmission screw rod; the opening of the open hole is located directly below and allows the ear loop to pass through.

2. The mask earloop tensile force detection system according to claim 1, wherein: The transmission screw rod is in a dumbbell shape with large diameters at both ends and a small diameter in the middle; the two ends of the part with a small diameter in the middle of the transmission screw rod are rotating connection parts; two open supports (23) are provided on the frame (1); the two open supports (23) are respectively rotatably connected to the corresponding rotating connection parts; the transmission screw rod is rotatably arranged in the open hole; the diameter of the open hole is smaller than the diameters of both ends of the transmission screw rod.

3. The mask earloop tensile force detection system according to claim 1, characterized in that: A guiding device (6) for guiding the ear loop into the thread groove is provided at one end of the transmission screw rod as the feed end of the conveying mechanism (2); the guiding device (6) includes a guiding slideway (61), a sleeve (62), and an anti-overturning gravity weight (63); the sleeve (62) is rotatably arranged at one end of the transmission screw rod as the feed end of the conveying mechanism (2); the guiding slideway (61) and the anti-overturning gravity weight (63) are oppositely arranged on the side wall of the sleeve (62); the anti-overturning gravity weight (63) is heavier than the guiding slideway (61); the guiding slideway (61) is used for guiding the ear loop to enter the thread groove along it.

4. The mask earloop tensile force detection system according to claim 1 or 2 or 3, characterized in that: It also has a visual inspection mechanism (7) for detecting the appearance of the mask body; the visual inspection mechanism (7) includes two industrial cameras that are oppositely arranged and fixedly installed on the frame (1); the two industrial cameras are arranged between the discharge end of the conveying mechanism (2) and the synchronous clamping mechanism (3); the industrial cameras are used to photograph the mask body of the mask passing by.

5. The mask earloop tensile force detection system according to claim 1 or 2 or 3, characterized in that: The sorting mechanism (5) includes a first chute (51) and a second chute (52); the first chute (51) is arranged on the frame (1), and the feed end of the first chute (51) corresponds to the discharge end of the conveying mechanism (2); the second chute (52) is fixedly connected to the synchronous clamping mechanism (3) and corresponds to the discharge end of the synchronous clamping mechanism (3).

6. The mask earloop tensile force detection system according to claim 4, wherein: The sorting mechanism (5) includes a first chute (51) and a second chute (52); the second chute (52) is fixedly connected to the synchronous clamping mechanism (3) and corresponds to the discharge end of the synchronous clamping mechanism (3); the first chute (51) is arranged on the frame (1) through a rotary driving device (53), and the discharge end of the first chute (51) is displaced under the drive of the rotary driving device (53), and the feed end of the first chute (51) always corresponds to the discharge end of the conveying mechanism (2).

7. The mask earloop tensile force detection system according to claim 1 or 2 or 3, characterized in that: The first driving device (21) includes a first driving motor (211); the first driving motor (211) is fixed on the frame (1); a driving friction wheel (212) is rotatably arranged on the frame (1); the output shaft of the first driving motor (211) is in transmission connection with the driving friction wheel (212); the driving friction wheel (212) forms a static friction with the large-diameter surface of the transmission screw.

8. The mask earloop tensile force detection system according to claim 1 or 2 or 3, characterized in that: The clamping part (31) includes two rows of guide wheel groups (311) arranged in parallel; each row of guide wheel groups (311) includes a plurality of guide wheels arranged at intervals along the conveying direction; The guide wheels of the two rows of guide wheel groups (311) are arranged staggeredly, and the guide wheels of the two rows of guide wheel groups (311) form a wavy clamping channel for the mask body to pass through and clamp the mask body. The second driving device includes a second driving motor and driving gears arranged on each guide wheel; the driving gears on each guide wheel are in transmission cooperation with each other, and the output shaft of the second driving motor is in transmission cooperation with the driving gear of one of the guide wheels.

9. The mask earloop tensile force detection system according to claim 1 or 2 or 3, characterized in that: The clamping part (31) includes two conveyor belts (312) arranged oppositely; the conveyor belts (312) are arranged along the conveying direction; a clamping part (31) for clamping the mask body is formed between the opposite planes of the two conveyor belts (312); the second driving device includes a second driving motor for driving the two conveyor belts.

10. The mask earloop tensile force detection system according to claim 1 or 2 or 3, characterized in that: Two symmetrically arranged and extending along the conveying direction hanging ear wire guiding plates (8) are further arranged on the frame (1); the two hanging ear wire guiding plates (8) are located on both sides of the hanging body (22); the hanging ear wire guiding plates (8) are provided with outward-opening guiding parts at the feed end of the conveying mechanism (2).

11. The mask earloop tensile force detection system according to claim 6, characterized in that: The rotary drive device (53) includes a rotating rod (531) and an electric pull rod (532); the upper and lower ends of the rotating rod (531) are respectively rotatably connected to the feeding end of the first slideway (51) and the machine frame (1); the discharging end of the first slideway (51) is rotatably connected to the output end of the electric pull rod (532).

12. The mask earloop tensile force detection system according to claim 1 or 2 or 3, characterized in that: The synchronous clamping mechanism (3) is further provided with a proximity sensor (9) for sensing that the mask reaches the tensile test position.

13. A detection method using the mask earloop tensile force detection system according to claim 5, characterized in that It includes the following steps: S1. The conveying mechanism (2) continuously receives the masks to be inspected. The masks to be inspected are hung on the corresponding card slots on the hanging body (22) through the ear loops to complete the hanging on the hanging body (22); the first driving device (21) drives the hanging body (22) to continuously convey the masks to be inspected forward; S2. Under the conveyance of the conveying mechanism (2), the mask body of the mask to be inspected enters the synchronous clamping mechanism (3); the synchronous clamping mechanism (3) clamps the mask body; S3. After the synchronous clamping mechanism (3) clamps the mask body, the tension device pulls the synchronous clamping mechanism (3) downward according to the set tension and maintains it until the next cycle; the controller determines whether it is completely broken, not completely broken or not broken according to the tension change sensed by the tension device; S4. If the ear loop is completely broken, the mask body will fall into the second slideway (52) after leaving the synchronous clamping mechanism (3); if the ear loop is not completely broken or not broken, the mask will fall from the discharging end of the conveying mechanism (2) into the first slideway (51).

14. A detection method using the mask earloop tensile force detection system according to claim 6, characterized in that It includes the following steps: S1. The conveying mechanism (2) continuously receives the masks to be inspected. The masks to be inspected are hung on the corresponding card slots on the hanging body (22) through the ear loops to complete the hanging on the hanging body (22); the first driving device (21) drives the hanging body (22) to continuously convey the masks to be inspected forward; S2. Under the conveyance of the conveying mechanism (2), the mask body of the mask to be inspected enters the synchronous clamping mechanism (3); the synchronous clamping mechanism (3) clamps the mask body; S3. After the synchronous clamping mechanism (3) clamps the mask body, the tension device pulls the synchronous clamping mechanism (3) downward according to the set tension and maintains it until the next cycle; the controller determines whether it is completely broken, not completely broken or not broken according to the tension change sensed by the tension device; S4. If the ear loop is completely broken, the mask body will fall into the second slideway (52) after leaving the synchronous clamping mechanism (3); if the ear loop is not completely broken or not broken, the mask will continue to move forward under the conveyance of the conveying mechanism (2); S5. The industrial camera takes pictures of the masks with the ear loops not completely broken or intact, and the masks continue to move forward after the shooting is completed; the controller judges whether it is intact according to the pictures taken by the industrial camera; S6. Before the masks with the ear loops not completely broken, not broken or intact fall from the discharging end of the conveying mechanism (2), the rotary drive device (53) selects whether to drive the discharging end of the first slideway (51) to displace according to the system determination result; if it is determined that it is not completely broken and not intact, the discharging end of the first slideway (51) will be displaced through the rotary drive device (53); if it is determined that it is not broken and intact, the discharging end of the first slideway (51) will not be displaced.

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