Full-automatic medical pull ring cover detection machine and detection method

Abstract

The invention relates to a full-automatic medical pull ring cover detection machine and a detection method. The full-automatic medical pull ring cover detection machine comprises an arranging and lifting device, a visual detection device and a display, the material arranging and lifting device is composed of a small stock bin, a large stock bin, a lifting machine body and a discharging channel, and a whole frame of scattered pull ring covers are poured into the small stock bin, arranged in the same direction in order from the discharging channel after being arranged through the lifting machine body, discharged out one by one and fed into the visual detection device. The visual detection device is composed of a first detection station and a second detection station, the detection mode is different from that of a traditional glass rotary table detection machine, lighting imaging directly faces an object to be detected, the imaging effect is good, imaging is free of distortion, the false detection rate is low, and the detection rate is high; the sorting and lifting device sorts, sorts and arranges the stacked and scattered pull ring covers, and then carries out related visual detection and rejection, so that the detection speed can be improved, and meanwhile, the detection qualification rate is improved.

Description

Technical Field

[0001] The invention discloses a fully automatic medical pull-ring cover detection machine, belongs to the technical field of medical detection, and specifically relates to a fully automatic medical pull-ring cover detection machine and a detection method. Background Art

[0002] The medical pull ring caps currently produced are mainly used to seal liquid medicine in medical infusion bottles. If there are foreign objects mixed inside the pull ring caps, it will directly affect the quality of the liquid medicine; the dimensional accuracy of the pull ring caps will also affect the sealing of the infusion bottles; the pull ring caps may have quality problems such as missing internal rubber plugs and missing inner caps during the production process, which will also have a direct impact on the quality of the infusion bottle filling. Therefore, the production of medical pull ring caps has extremely strict requirements, and all kinds of defective caps that appear in the production process need to be selected.

[0003] At present, most of the medical ring-pull cap manufacturers on the market use manual visual selection to select defective products. Not only is the labor cost high, but it is also difficult to comprehensively grasp the appearance, shape and size of the ring-pull caps. Manual selection cannot completely detect small black spots and small missing materials on the ring-pull caps, and the missed detection rate is very high, which affects the qualified rate of medical ring-pull caps. Enterprises are in urgent need of a fully automatic ring-pull cap inspection machine. Summary of the invention

[0004] Purpose of the invention: To provide a fully automatic medical pull-tab lid inspection machine and inspection method to solve the above-mentioned problems.

[0005] Technical solution:

[0006] In the first aspect, a fully automatic medical pull-tab lid inspection machine comprises a material sorting and lifting device, a visual inspection device and a display;

[0007] The material sorting and lifting device is connected to the visual inspection device; the display is installed on the visual inspection device;

[0008] The material sorting and lifting device is composed of a small material bin, a large material bin, a lifting machine body and a discharge channel. The scattered pull ring covers of the whole frame are poured into the small material bin. After being sorted by the lifting machine body, they are arranged in a neat and consistent direction from the discharge channel, come out one by one, and enter the visual inspection device.

[0009] The visual inspection device consists of a first inspection station and a second inspection station; the first inspection station clamps the two sides of the pull ring cover through a clamping belt to inspect the bottom inner cavity of the pull ring cover; the second inspection station places the pull ring cover on a flat belt with the mouth facing downward to inspect the top and four sides of the pull ring cover.

[0010] In a further embodiment, the elevator body includes: a base frame, which is fixedly installed in the working area by a plurality of feet; a lifting frame, which is fixedly installed on the base frame, and the lifting frame is divided into a climbing material sorting area and a material dropping area, and the climbing material sorting area arranges the pull ring covers dropped from the small material bin into a consistent direction and sends the pull ring covers that meet the requirements into the material dropping area, and those that do not meet the requirements into the large material bin, and the material dropping area transports the pull ring covers to the visual inspection device; a lifting chain plate, which is driven by a motor and a transmission shaft to move in the lifting frame, and the lifting chain plate is provided with a plurality of equidistantly arranged first baffles, and the baffles have a step on one side to hang on the edge of the pull ring cover; a second baffle is installed on the lifting frame in an inclined manner, and after lifting, the side of the pull ring cover collides with the second baffle, and the pull ring cover is pushed obliquely to the material dropping area through the second baffle and the inclination.

[0011] In a further embodiment, the blanking area includes a blanking shell, a blanking roller and a discharge channel; the blanking shell is fixedly installed on one side of the lifting frame and is connected with the climbing material sorting area, the blanking roller is installed at the bottom of the blanking shell and is driven to rotate by a motor to bring the pull ring cover into the discharge channel, and the discharge channel is fixedly installed at the bottom of the blanking shell and is connected with the blanking shell and the visual inspection device to move the pull ring cover into the visual inspection device.

[0012] In a further embodiment, the lifting chain plate is driven by a first transmission shaft, a second transmission shaft and a third transmission shaft, the first transmission shaft and the second transmission shaft are installed at the bottom of the lifting frame, the third transmission shaft is installed at the top of the lifting frame, the third transmission shaft is driven by a motor, and the chain plate cooperates with the first transmission shaft, the second transmission shaft and the third transmission shaft at the same time.

[0013] In a further embodiment, a feed chain plate is provided at the bottom of the small silo, and the feed chain plate is driven by a motor to move the pull ring cover dropped from the small silo onto the feed chain plate clockwise and drop into the lifting chain plate of the lifting machine body.

[0014] In a further embodiment, the visual inspection device includes: a frame, which is fixedly installed in the working area by a plurality of feet; a turntable, which is installed in the frame and driven to rotate by a motor, the turntable is connected to the discharge channel so that the pull ring cover falls from the discharge channel outlet to the turntable and as the turntable rotates counterclockwise, it drives the pull ring cover to change from a vertical direction to a horizontal direction; a first conveyor belt, which is installed in the frame and connected with the turntable to drive the pull ring cover to move in a horizontal direction; a clamping belt, including upper and lower clamping belts and installed in the frame and driven by a motor, the first conveyor belt intersects with one end of the clamping belt, and the pull ring cover reaches the clamping belt position, and the clamping belt clamps the two sides of the pull ring cover and drives it to move; a first detection station, which is installed at the bottom of the clamping belt; a second conveyor belt, which is installed in the frame and connected with the other end of the clamping belt; a second detection station, which is installed on the second conveyor belt; optical fiber sensors are provided on the first detection station and the second detection station.

[0015] In a further embodiment, the pull ring cover passes through the optical fiber sensor, and the optical fiber sensor triggers a signal to the industrial computer. When the pull ring cover passes through the first detection station, it triggers a bottom camera to take a picture and detect the bottom inner cavity of the pull ring cover. The algorithm identifies whether the pull ring cover is a qualified product, and then falls onto the second conveyor belt.

[0016] In a further embodiment, the second conveyor belt is provided with a first exhaust gas nozzle and a second exhaust gas nozzle, and the frame is provided with a first unqualified product port, a second unqualified product port and a qualified product port;

[0017] The first exhaust gas nozzle is arranged on the second conveyor belt and is located at the connection position between the second conveyor belt and the clamping belt. The first exhaust gas nozzle blows compressed air to blow the caps judged as unqualified products by the first inspection station to the first unqualified product port;

[0018] The second exhaust nozzle is arranged at the tail of the second conveyor belt to blow the caps judged as unqualified products by the industrial computer to the second unqualified product port;

[0019] The qualified product port is butted against the tail of the second conveyor belt, and qualified caps flow out through it.

[0020] In a further embodiment, the second inspection station is composed of a total of 5 cameras, a middle camera detects the top of the pull ring cover, and 4 side cameras are evenly distributed at 90 degrees around it; the top camera is perpendicular to the second conveyor belt and shoots the top of the pull ring cover; the side camera forms an image through a reflector and shoots the side of the pull ring cover, and the reflector is installed on both sides of the second conveyor belt.

[0021] In a second aspect, a detection method of a fully automatic medical pull-tab lid detection machine is implemented by using the above-mentioned fully automatic medical pull-tab lid detection machine, comprising the following steps:

[0022] Step 1: Pour the scattered pull ring covers of the whole frame into the small silo. The pull ring covers fall from the small silo to the feed chain plate. The feed chain plate rotates clockwise to transport the pull ring covers to the large elevator chain plate at the bottom. As the chain plate rises, the pull ring covers are transported upwards with the chain plate.

[0023] Step 2: The pull ring cover is transported upward along with the chain plate and enters the climbing material sorting area to sort the scattered covers into a consistent direction. As the chain plate is lifted upward, the side of the pull ring cover hits the second stop bar above and is pushed obliquely by the second stop bar to the drop area. Through the discharge channel, the pull ring cover is arranged in sequence and enters the discharge channel and moves to the visual inspection device.

[0024] Step 3, the pull ring cover falls onto the turntable from the outlet of the discharge channel, and the turntable rotates counterclockwise to change the pull ring cover from the vertical direction to the horizontal direction and moves to the first conveyor belt. The first conveyor belt intersects with the clamping belt, and the pull ring cover reaches the clamping belt position. The clamping belt clamps the two sides of the pull ring cover. Since the belt speed of the clamping belt is much faster than that of the first conveyor belt, the speed difference between the two belts is used to evenly open the distance between the pull ring covers.

[0025] Step 4, the pull ring cover passes through the optical fiber sensor and the first detection station in sequence. The pull ring cover passes through the optical fiber sensor, and the sensor sends a trigger signal to the industrial computer. When the pull ring cover passes through the first detection station, a bottom camera is triggered to take a picture and detect the bottom inner cavity of the pull ring cover. The algorithm identifies whether the pull ring cover is a qualified product, and then falls onto the second conveyor belt. The first exhaust nozzle blows the unqualified cover to the first unqualified product outlet;

[0026] Step 5. Qualified caps are transported along the second conveyor belt, passing through the optical fiber sensor, the second inspection station, and the second exhaust nozzle in sequence. The pull-ring cap passes through the optical fiber sensor, and the sensor triggers a signal to the industrial computer. When the pull-ring cap passes through the second inspection station, five cameras are triggered to take photos and detect the top and four sides of the pull-ring cap. The algorithm identifies whether the pull-ring cap is a qualified product. When the pull-ring cap passes through the second exhaust nozzle, the program determines that the caps that are unqualified are blown off to the second unqualified product port. After passing through the second exhaust nozzle, the qualified caps fall into the qualified product port.

[0027] Compared with the traditional technology, the present invention has the following advantages:

[0028] 1. The detection method of the present invention is different from that of the traditional glass turntable detection machine. The imaging is directly directed at the object to be inspected, with good imaging effect, no distortion, low false detection rate and high detection rate. At the same time, the present invention solves the problem that the traditional glass turntable is easy to slip and affects the detection effect.

[0029] 2. The present invention is provided with a material sorting and lifting device to sort, sequence and arrange the scattered piles of pull-ring covers, and then perform relevant visual inspection and elimination, thereby improving the inspection speed and the inspection pass rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the fully automatic medical pull-tab cover detection machine of the present invention.

[0031] Figure 2 It is a left view of the material sorting and lifting device of the present invention.

[0032] Figure 3 It is a front view of the material sorting and lifting device of the present invention.

[0033] Figure 4 The material handling and lifting device of the present invention is schematically shown in FIG. Figure 1 .

[0034] Figure 5 The material handling and lifting device of the present invention is schematically shown in FIG. Figure 2 .

[0035] Figure 6 It is a schematic diagram of a feed chain plate of the present invention.

[0036] Figure 7 It is a working schematic diagram of the material sorting and lifting device of the present invention.

[0037] Figure 8 It is a top view of the visual inspection device of the present invention.

[0038] Fig. 9 It is a front view of the visual inspection device of the present invention.

[0039] Fig.10 This is a schematic diagram of the second detection station of the present invention. Figure 1 .

[0040] Fig.11 This is a schematic diagram of the second detection station of the present invention. Figure 2 .

[0041] Figure numerals: material sorting and lifting device 1, visual inspection device 2, display 3, small material bin 11, large material bin 12, elevator body 13, discharge channel 14, base frame 131, lifting frame 132, climbing material sorting area 133, blanking area 134, lifting chain plate 135, first baffle 136, second baffle 137, shell 15, blanking roller 16, first transmission shaft 17, second transmission shaft 18, third transmission shaft 19, feed chain plate 20, turntable 22, first conveyor belt 23, clamping belt 24, first inspection station 25, second inspection station 37, second conveyor belt 26, optical fiber sensor 27, first exhaust nozzle 28, second exhaust nozzle 29, first unqualified product port 30, second unqualified product port 31, qualified product port 32, bottom camera 33, side camera 34, top camera 35, discharge port 36, annular light source 38, reflector 39. DETAILED DESCRIPTION

[0042] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Embodiment 1:

[0044] A fully automatic medical pull-tab lid inspection machine and inspection method, such as Figures 1 to 11 As shown, it includes: a material sorting and lifting device 1, a visual inspection device 2 and a display 3;

[0045] The material sorting and lifting device 1 is connected to the visual inspection device 2; the display 3 is installed on the visual inspection device 2;

[0046] The material sorting and lifting device 1 is composed of a small material bin 11, a large material bin 12, a lifting machine body 13 and a discharge channel 14. The scattered pull ring covers are poured into the small material bin 11, sorted by the lifting machine body 13, and arranged in a neat and consistent direction through the discharge channel 14, and come out one by one into the visual inspection device 2;

[0047] The visual inspection device 2 consists of a first inspection station 25 and a second inspection station 37; the first inspection station 25 clamps the two sides of the pull ring cover through the clamping belt 24 to inspect the bottom inner cavity of the pull ring cover; the second inspection station 37 places the pull ring cover on the flat belt with the mouth facing downward to inspect the top and four sides of the pull ring cover.

[0048] In one embodiment, Figures 2 to 7As shown, the elevator body 13 includes: a base frame 131, which is fixedly installed in the working area by a plurality of feet; a lifting frame 132, which is fixedly installed on the base frame 131, and the lifting frame 132 is divided into a climbing material sorting area 133 and a dropping material area 134. The climbing material sorting area 133 arranges the pull ring covers dropped from the small silo 11 into a consistent direction and puts the pull ring covers that meet the requirements into the dropping material area 134, and the pull ring covers that do not meet the requirements into the large silo 12. The dropping material area 134 transports the pull ring covers to the visual inspection area 134. In the measuring device 2; a lifting chain plate 135 is driven by a motor and a transmission shaft to move in the lifting frame 132, and a plurality of first baffles 136 arranged equidistantly are provided on the lifting chain plate 135, and a step is provided on one side of the baffle to hook with the edge of the pull ring cover; a second baffle 137 is installed on the lifting frame 132 in an inclined manner, and the side of the pull ring cover collides with the second baffle 137 after lifting, and the pull ring cover is pushed obliquely to the blanking area 134 through the second baffle 137 and the inclination.

[0049] In one embodiment, Figures 2 to 7 As shown, the blanking area 134 includes a blanking shell 15, a blanking roller 16 and a discharge channel 14; the blanking shell 15 is fixedly installed on one side of the lifting frame 132 and is connected to the climbing material sorting area 133, the blanking roller 16 is installed at the bottom of the blanking shell and is driven to rotate by a motor to bring the pull ring cover into the discharge channel 14, and the discharge channel 14 is fixedly installed at the bottom of the blanking shell 15 and is connected to the blanking shell 15 and the visual inspection device 2 to move the pull ring cover into the visual inspection device 2.

[0050] In one embodiment, Figures 2 to 7 As shown, the lifting chain plate 135 is driven by the first transmission shaft 17, the second transmission shaft 18 and the third transmission shaft 19. The first transmission shaft 17 and the second transmission shaft 18 are installed at the bottom of the lifting frame 132, and the third transmission shaft 19 is installed at the top of the lifting frame 132. The third transmission shaft 19 is driven by a motor, and the chain plate cooperates with the first transmission shaft 17, the second transmission shaft 18 and the third transmission shaft 19 at the same time.

[0051] In one embodiment, Figures 2 to 7 As shown, a feed chain plate 20 is provided at the bottom of the small silo 11, and the feed chain plate 20 is driven by a motor to move the pull ring cover dropped from the small silo 11 onto the feed chain plate 20 clockwise and drop into the lifting chain plate 135 of the lifting machine body 13.

[0052] In one embodiment, Figures 8 to 11As shown, the visual inspection device 2 includes: a frame, which is fixedly installed in the working area by a plurality of feet; a turntable 22, which is installed in the frame and driven to rotate by a motor, and the turntable 22 is connected with the discharge channel 14 so that the pull ring cover falls from the outlet of the discharge channel 14 onto the turntable 22 and as the turntable 22 rotates counterclockwise, the pull ring cover is driven to change from a vertical direction to a horizontal direction; a first conveyor belt 23, which is installed in the frame and connected with the turntable 22 to drive the pull ring cover to move in a horizontal direction; a clamping belt 24, including an upper and lower clamping belt 24 and arranged Installed in the frame and driven by a motor, the first conveyor belt 23 intersects with one end of the clamping belt 24, the pull ring cover reaches the position of the clamping belt 24, and the clamping belt 24 clamps the two sides of the pull ring cover and drives it to move; the first detection station 25 is installed at the bottom of the clamping belt 24; the second conveyor belt 26 is installed in the frame and connected with the other end of the clamping belt 24; the second detection station 37 is installed on the second conveyor belt 26; the first detection station 25 and the second detection station 37 are provided with optical fiber sensors 27.

[0053] In one embodiment, Figures 8 to 11 As shown, the pull ring cover passes through the optical fiber sensor 27, and the optical fiber sensor 27 gives a trigger signal to the industrial computer. When the pull ring cover passes through the first detection station 25, a bottom camera 33 is triggered to take a picture to detect the bottom inner cavity of the pull ring cover. The algorithm identifies whether the pull ring cover is a qualified product, and then it falls onto the second conveyor belt 26.

[0054] In one embodiment, Figures 8 to 11 As shown, the second conveyor belt 26 is provided with a first exhaust gas nozzle 28 and a second exhaust gas nozzle 29, and the frame is provided with a first unqualified product port 30, a second unqualified product port 31 and a qualified product port 32;

[0055] The first exhaust nozzle 28 is disposed on the second conveyor belt 26 and is located at the junction of the second conveyor belt 26 and the clamping belt 24. The first exhaust nozzle 28 blows compressed air to blow the caps judged as unqualified products by the first inspection station 25 to the first unqualified product port 30;

[0056] The second exhaust nozzle 29 is disposed at the tail end of the second conveyor belt 26 to blow the caps judged as unqualified products by the industrial computer to the second unqualified product port 31;

[0057] The qualified product port 32 is connected to the tail of the second conveyor belt 26, and qualified caps flow out through it.

[0058] In one embodiment, Figures 8 to 11As shown, the second inspection station 37 is composed of a total of 5 cameras, a middle camera detects the top of the pull ring cover, and 4 side cameras 34 are evenly distributed at 90 degrees around it; the top camera 35 is perpendicular to the second conveyor belt 26 to shoot the top of the pull ring cover; the side camera 34 is imaged through the reflector 39 to shoot the side of the pull ring cover, and the reflector 39 is installed on both sides of the second conveyor belt 26.

[0059] Embodiment 2:

[0060] A detection method of a fully automatic medical pull-tab lid detection machine is implemented by using the above-mentioned fully automatic medical pull-tab lid detection machine, comprising the following steps:

[0061] Step 1: Pour the scattered pull ring covers of the whole frame into the small silo 11. The pull ring covers fall from the small silo 11 to the feed chain plate 20. The feed chain plate 20 rotates clockwise to transport the pull ring covers to the large elevator chain plate at the bottom. As the chain plate is lifted, the pull ring covers are transported upward with the chain plate.

[0062] Step 2, the pull ring cover is transported upward along with the chain plate and enters the climbing material sorting area 133, and the scattered covers are sorted into a consistent direction. As the chain plate is lifted upward, the side of the pull ring cover hits the second stop bar 137 above, and is pushed obliquely by the second stop bar 137 to the drop area 134, passes through the discharge channel 14, and the pull ring covers are arranged in sequence and enter the discharge channel 14 and move to the visual inspection device 2;

[0063] Step 3, the pull ring cover is dropped onto the turntable 22 from the outlet of the discharge channel 14, and the turntable 22 rotates counterclockwise to change the pull ring cover from the vertical direction to the horizontal direction and moves to the first conveyor belt 23, and the first conveyor belt 23 intersects with the clamping belt 24, and the pull ring cover reaches the position of the clamping belt 24, and the clamping belt 24 clamps the two sides of the pull ring cover. Since the speed of the clamping belt 24 is much faster than that of the first conveyor belt 23, the speed difference between the two belts is used to evenly open the distance between the pull ring covers;

[0064] Step 4, the pull ring cover passes through the optical fiber sensor 27 and the first detection station 25 in sequence. The pull ring cover passes through the optical fiber sensor 27, and the sensor sends a trigger signal to the industrial computer. When the pull ring cover passes through the first detection station 25, a bottom camera 33 is triggered to take a picture and detect the bottom inner cavity of the pull ring cover. The algorithm identifies whether the pull ring cover is a qualified product, and then falls onto the second conveyor belt 26. The first exhaust nozzle 28 blows the unqualified cover to the first unqualified product port 30;

[0065] Step 5. Qualified lids are transported along the second conveyor belt 26, and pass through the optical fiber sensor 27, the second inspection station 37, and the second exhaust nozzle 29 in sequence. The pull-ring lid passes through the optical fiber sensor 27, and the sensor gives a trigger signal to the industrial computer. When the pull-ring lid passes through the second inspection station 37, five cameras are triggered to take photos and detect the top and the four sides of the pull-ring lid. The algorithm identifies whether the pull-ring lid is a qualified product. When the pull-ring lid passes through the second exhaust nozzle 29, the program determines that the lid is an unqualified product and is blown off to the second unqualified product port 31. After the qualified lid passes through the second exhaust nozzle 29, it falls into the qualified product port 32.

[0066] Specifically, there are inspection machines for the pull ring cover on the market. The defect detection speed of this type of equipment is slow (generally 300 to 400 per minute), the detection effect is poor, and it cannot match the speed of the front-end production line, and cannot meet the customer's inspection requirements. In order to realize the inspection of the pull ring cover, it is necessary to sort, sort, and arrange the piles of scattered pull ring covers before relevant visual inspection and removal. The first inspection station 25 clamps the two sides of the pull ring cover through the clamping belt 24 to inspect the bottom inner cavity of the pull ring cover; the second inspection station 37 places the pull ring cover on the flat belt with the mouth facing down to inspect the top and four sides of the pull ring cover.

[0067] In one embodiment, Figures 2 to 7 As shown, the material sorting and lifting device 1 is mainly composed of a small material bin 11, a large material bin 12, a lifting machine body 13, and a discharge channel 14. The scattered pull ring covers of the whole frame are poured into the small material bin 11, and after being sorted by the material sorting and lifting device 1, they are arranged in a neat and consistent direction from the discharge port 36, and come out one by one and enter the visual inspection device 2;

[0068] Specifically, a set of feeding chain plates 20 are installed under the small silo 11. The pull ring cover falls from the small silo 11 onto the feeding chain plates 20. The feeding chain plates 20 rotate clockwise to transport the pull ring cover to the large elevator chain plates below. The feeding chain plates 20 are driven by a motor. When the motor stops rotating, the pull ring cover will not fall onto the bottom chain plates, thereby controlling the number of pull ring covers in the large silo 12. If there are too many pull ring covers, the material feeding rate will be greatly reduced. Therefore, this method is used to control the feeding of the pull ring covers. The pull ring cover falls onto the elevator chain plates, and as the chain plates are lifted, the pull ring cover is transported upward with the chain plates.

[0069] The pull ring cover is transported upward along the lifting chain plate 135 and enters the climbing material sorting area 133 to sort the scattered covers into a consistent direction. Figure 7 The lifting chain plate 135 is then lifted upward, and the side of the pull ring cover hits the second stop bar 137 above, and is pushed obliquely by the second stop bar 137 to the blanking area 134. A discharge channel 14 is installed at the bottom of the blanking area 134, and the pull ring covers are arranged in sequence and enter the discharge channel 14.

[0070] More specifically, Figure 6 As shown, a customized first stopper 136 is installed on the lifting chain plate 135. The first stopper 136 has a step on one side, which can be hooked with the edge of the pull ring cover to make it rise steadily during the lifting process without falling. Figure 7 As shown, the pull ring cover A, B, and C are three typical forms. According to actual tests, the pull ring cover on the lifting chain plate 135 is mostly in the A form. The essence is that the cover is affected by the gravity of its own center of gravity, and the cover is most stable in this form. In addition, the pull ring cover A will be hung by the first stop bar 136 and rise steadily with the operation of the lifting chain plate 135, while the rest of B and C will roll randomly on the lifting chain plate 135. When they roll into the A form, they will also be hung by the stop bar and rise together with the lifting chain plate 135.

[0071] The pull ring cover is lifted along with the chain plate and enters the climbing material sorting area 133. Figure 6 Three typical states of the pull ring cover A / B / C are listed. It can be known from actual tests that due to the influence of the center of gravity of the pull ring cover, the pull ring cover A is hung by the baffle bar and is transported upward with the chain plate, while the pull ring cover B / C cannot be hung and will fall freely back into the large silo 12.

[0072] In one embodiment, Figures 8 to 11 As shown, the pull ring cover falls from the outlet of the discharge channel 14 onto the turntable 22. The turntable 22 rotates counterclockwise, which, on the one hand, changes the movement direction of the pull ring cover from the vertical direction to the horizontal direction, and connects with the belt moving horizontally to the right; on the other hand, the turntable 22 rotates slowly, which can reduce the falling speed of the pull ring cover and make it stably connected with the belt.

[0073] The pull-tab cover passes through the turntable 22 and enters the first conveyor belt 23. The speed of the first conveyor belt 23 is much slower than that of the clamping belt 24. Guide rails are installed on both sides of the conveyor belt to arrange the pull-tab covers one by one on the first conveyor belt 23 and make linear motion with the conveyor belt.

[0074] The first conveyor belt 23 intersects with the clamping belt 24, and the pull ring cover reaches the position of the clamping belt 24. The clamping belt 24 clamps the two sides of the pull ring cover. Since the speed of the clamping belt 24 is much faster than that of the first conveyor belt 23, the speed difference between the two belts is used to evenly open the distance between the pull ring covers. The two clamping belts 24 have the same speed. The upper clamping belt 24 moves counterclockwise, and the lower clamping belt 24 moves clockwise to clamp the pull ring cover. The pull ring cover passes through the optical fiber sensor 27 and the first detection station 25 in turn. The pull ring cover passes through the optical fiber sensor 27, and the sensor triggers a signal to the industrial computer. When the pull ring cover passes through the first detection station 25, a bottom camera 33 is triggered to take pictures and detect the bottom inner cavity of the pull ring cover. The algorithm identifies whether the pull ring cover is a qualified product, and then falls on the second conveyor belt 26. The speed of the second conveyor belt 26 is the same as the speed of the clamping belt 24, so that the pull ring cover can fall on the belt stably.

[0075] The second conveyor belt 26 is provided with a first exhaust nozzle 28, which blows compressed air to blow the caps judged as unqualified products by the first inspection station 25 to the unqualified product port 32. The qualified caps are transported along the second conveyor belt 26, and pass through the optical fiber sensor 27, the second inspection station 37, and the second exhaust nozzle 29 in sequence. The pull ring cap passes through the optical fiber sensor 27, and the sensor triggers a signal to the industrial computer. When the pull ring cap passes through the second inspection station 37, five cameras are triggered to take pictures to detect the top and surroundings of the pull ring cap, and the algorithm identifies whether the pull ring cap is a qualified product. When the pull ring cap passes through the second exhaust nozzle 29, the cap judged as an unqualified product by the program is blown down to the unqualified product channel, and the qualified cap falls into the qualified product channel after passing the second exhaust nozzle 29.

[0076] The second detection station 37 is as follows Fig.10 and Fig.11 As shown, the station consists of 5 cameras, a central camera detects the top of the pull ring cover, and 4 side cameras 34 are evenly distributed around at 90 degrees. The top camera 35 is perpendicular to the belt and directly photographs the top of the pull ring cover; the side camera 34 is imaged through the reflector 39 and photographs the side of the pull ring cover. The reflector 39 is installed on both sides of the belt.

[0077] The principle of this detection method is different from the problem of the pull-ring cover of the traditional glass turntable inspection machine that it is very easy to slip on the glass, resulting in the pull-ring cover being unstable in the inspection area and poor inspection effect. When the glass turntable inspection machine inspects the pull-ring cover, the bottom station takes pictures through the glass, and the imaging effect is poor, and the internal defects of the cover cannot be fully detected. At the side station of the glass turntable inspection machine, the camera is blocked by the glass and cannot be taken horizontally, so the image of the pull-ring cover will be distorted, the imaging effect is poor, resulting in an increase in the false detection rate and a decrease in the defect detection rate.

[0078] The principle of the detection method introduced in the present invention has the main advantages that the lighting and imaging are directly directed to the object to be inspected, the imaging effect is good, the imaging is distortion-free, the false detection rate is low, and the detection rate is high.

[0079] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A fully automatic medical pull-tab lid inspection machine, characterized in that: It consists of a material handling and lifting device, a visual inspection device and a display; The material sorting and lifting device is connected to the visual inspection device; the display is installed on the visual inspection device; The material sorting and lifting device is composed of a small material bin, a large material bin, a lifting machine body and a discharge channel. The scattered pull ring covers of the whole frame are poured into the small material bin. After being sorted by the lifting machine body, they are arranged in a neat and consistent direction from the discharge channel, come out one by one, and enter the visual inspection device. The visual inspection device consists of a first inspection station and a second inspection station; the first inspection station clamps the two sides of the pull ring cover through a clamping belt to inspect the bottom inner cavity of the pull ring cover; the second inspection station places the pull ring cover on a flat belt with the mouth facing downward to inspect the top and four sides of the pull ring cover.

2. The fully automatic medical pull-tab lid inspection machine according to claim 1, characterized in that: The elevator body includes: a base frame, which is fixedly installed in the working area by a plurality of feet; a lifting frame, which is fixedly installed on the base frame, and the lifting frame is divided into a climbing material sorting area and a dropping material area, and the climbing material sorting area arranges the pull ring covers dropped from the small material bin into a consistent direction and sends the pull ring covers that meet the requirements into the dropping material area, and those that do not meet the requirements into the large material bin, and the dropping material area transports the pull ring covers to the visual inspection device; a lifting chain plate, which is driven by a motor and a transmission shaft to move in the lifting frame, and a plurality of equidistantly arranged first baffles are provided on the lifting chain plate, and a step is provided on one side of the baffle to hang on the edge of the pull ring cover; a second baffle is installed on the lifting frame in an inclined manner, and after lifting, the side of the pull ring cover collides with the second baffle, and the pull ring cover is pushed obliquely to the dropping material area through the second baffle and the inclination.

3. The fully automatic medical pull-tab lid inspection machine according to claim 2, characterized in that: The blanking area includes a blanking shell, a blanking roller and a discharge channel; the blanking shell is fixedly installed on one side of the lifting frame and is connected to the climbing material sorting area, the blanking roller is installed at the bottom of the blanking shell and is driven to rotate by a motor to bring the pull ring cover into the discharge channel, and the discharge channel is fixedly installed at the bottom of the blanking shell and is connected to the blanking shell and the visual inspection device to move the pull ring cover into the visual inspection device.

4. The fully automatic medical pull-tab lid inspection machine according to claim 2, characterized in that: The lifting chain plate is driven by the first transmission shaft, the second transmission shaft and the third transmission shaft. The first transmission shaft and the second transmission shaft are installed at the bottom of the lifting frame, and the third transmission shaft is installed at the top of the lifting frame. The third transmission shaft is driven by a motor, and the chain plate cooperates with the first transmission shaft, the second transmission shaft and the third transmission shaft at the same time.

5. The fully automatic medical pull-tab lid inspection machine according to claim 2, characterized in that: A feeding chain plate is provided at the bottom of the small material bin, and the feeding chain plate is driven by a motor to move the pull ring cover dropped from the small material bin onto the feeding chain plate clockwise and drop it into the lifting chain plate of the lifting machine body.

6. The fully automatic medical pull-tab lid inspection machine according to claim 3, characterized in that: The visual inspection device includes: a frame, which is fixedly installed in the working area by a plurality of feet; a turntable, which is installed in the frame and driven to rotate by a motor, the turntable is connected with the discharge channel so that the pull ring cover falls from the discharge channel outlet onto the turntable and drives the pull ring cover to move from the vertical direction to the horizontal direction as the turntable rotates counterclockwise; a first conveyor belt, which is installed in the frame and connected with the turntable to drive the pull ring cover to move in the horizontal direction; a clamping belt, including upper and lower clamping belts and installed in the frame and driven by a motor, the first conveyor belt intersects with one end of the clamping belt, the pull ring cover reaches the clamping belt position, and the clamping belt clamps the two sides of the pull ring cover and drives it to move; a first detection station, which is installed at the bottom of the clamping belt; a second conveyor belt, which is installed in the frame and connected with the other end of the clamping belt; a second detection station, which is installed on the second conveyor belt; optical fiber sensors are provided on the first detection station and the second detection station.

7. The fully automatic medical pull-tab lid inspection machine according to claim 6, characterized in that: The pull ring cover passes through the optical fiber sensor, and the optical fiber sensor gives a trigger signal to the industrial computer. When the pull ring cover passes through the first detection station, it triggers a bottom camera to take a picture and detect the bottom inner cavity of the pull ring cover. The algorithm identifies whether the pull ring cover is a qualified product, and then it falls onto the second conveyor belt.

8. The fully automatic medical pull-tab lid inspection machine according to claim 6, characterized in that: The second conveyor belt is provided with a first exhaust gas nozzle and a second exhaust gas nozzle, and the frame is provided with a first unqualified product outlet, a second unqualified product outlet and a qualified product outlet; The first exhaust gas nozzle is arranged on the second conveyor belt and is located at the connection position between the second conveyor belt and the clamping belt. The first exhaust gas nozzle blows compressed air to blow the caps judged as unqualified products by the first inspection station to the first unqualified product port; The second exhaust nozzle is arranged at the tail of the second conveyor belt to blow the caps judged as unqualified products by the industrial computer to the second unqualified product port; The qualified product port is butted against the tail of the second conveyor belt, and qualified caps flow out through it.

9. The fully automatic medical pull-tab lid inspection machine according to claim 6, characterized in that: The second inspection station is composed of a total of 5 cameras, with a middle camera to detect the top of the pull-ring cover, and 4 side cameras evenly distributed at 90 degrees around it; the top camera is perpendicular to the second conveyor belt to photograph the top of the pull-ring cover; the side camera forms an image through a reflector to photograph the side of the pull-ring cover, and the reflector is installed on both sides of the second conveyor belt.

10. A detection method of a fully automatic medical pull-tab lid detection machine, characterized in that: The invention is implemented by using a fully automatic medical pull-tab lid detection machine as described in any one of claims 1 to 9, comprising the following steps: Step 1: Pour the scattered pull ring covers of the whole frame into the small silo. The pull ring covers fall from the small silo to the feed chain plate. The feed chain plate rotates clockwise to transport the pull ring covers to the large elevator chain plate at the bottom. As the chain plate rises, the pull ring covers are transported upwards with the chain plate. Step 2: The pull ring cover is transported upward along with the chain plate and enters the climbing material sorting area to sort the scattered covers into a consistent direction. As the chain plate is lifted upward, the side of the pull ring cover hits the second stop bar above and is pushed obliquely by the second stop bar to the drop area. Through the discharge channel, the pull ring cover is arranged in sequence and enters the discharge channel and moves to the visual inspection device. Step 3, the pull ring cover falls onto the turntable from the outlet of the discharge channel, and the turntable rotates counterclockwise to change the pull ring cover from the vertical direction to the horizontal direction and moves to the first conveyor belt. The first conveyor belt intersects with the clamping belt, and the pull ring cover reaches the clamping belt position. The clamping belt clamps the two sides of the pull ring cover. Since the belt speed of the clamping belt is much faster than that of the first conveyor belt, the speed difference between the two belts is used to evenly open the distance between the pull ring covers. Step 4, the pull ring cover passes through the optical fiber sensor and the first detection station in sequence. The pull ring cover passes through the optical fiber sensor, and the sensor sends a trigger signal to the industrial computer. When the pull ring cover passes through the first detection station, a bottom camera is triggered to take a picture and detect the bottom inner cavity of the pull ring cover. The algorithm identifies whether the pull ring cover is a qualified product, and then falls onto the second conveyor belt. The first exhaust nozzle blows the unqualified cover to the first unqualified product outlet; Step 5. Qualified caps are transported along the second conveyor belt, passing through the optical fiber sensor, the second inspection station, and the second exhaust nozzle in sequence. The pull-ring cap passes through the optical fiber sensor, and the sensor triggers a signal to the industrial computer. When the pull-ring cap passes through the second inspection station, five cameras are triggered to take photos and detect the top and four sides of the pull-ring cap. The algorithm identifies whether the pull-ring cap is a qualified product. When the pull-ring cap passes through the second exhaust nozzle, the program determines that the caps that are unqualified are blown off to the second unqualified product port. After passing through the second exhaust nozzle, the qualified caps fall into the qualified product port.

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