CN216361777U - Printed matter defect detection equipment based on machine vision - Google Patents

Abstract

The utility model discloses printed matter defect detection equipment based on machine vision, and relates to the technical field of printed matter detection equipment, wherein the printed matter defect detection equipment comprises a detection assembly, a material taking assembly, a material storing assembly and a driving assembly; the detection assembly comprises a supporting unit and a detection unit; the material storage assemblies are provided with a plurality of groups, and the plurality of groups of material storage assemblies are respectively arranged at two ends of the supporting unit; the material storage assembly comprises a storage plate and a push plate unit used for pushing the printed matters in order; the material taking assembly comprises a suction nozzle, a lifting unit, an adjusting unit and a vibrating unit for preventing printed matters from being adhered, and the detecting assembly can detect the front and back surfaces of the printed matters to ensure the comprehensiveness of the detection; vibrate the unit and can vibrate when getting the material, prevent to get the material when leading to the problem of getting more because of the printed matter adhesion, the adjustment unit can adjust the interval of suction nozzle to adapt to the not unidimensional printed matter.

Description

Printed matter defect detection equipment based on machine vision

Technical Field

The utility model relates to the technical field of printed matter detection equipment, in particular to printed matter defect detection equipment based on machine vision.

Background

The detection of printed matters is mainly divided into two parts: the method comprises the following steps of detecting the quality of paper and detecting the printing content, wherein the detecting of the printing content mainly comprises the following steps: white page or leaf, wrong page or leaf, ghost image, wait the project detection, when detecting the printed matter among the prior art, most adopt the manual work to place the printed matter and detect on detecting the bench, efficiency is lower, will cause the problem of getting more easily when the printed matter is got to the manual work simultaneously to make to detect inaccurately, simultaneously, when detecting the printed matter in batches, the manual work can't put the printed matter that detects the completion neatly, need arrange in order again, extravagant manpower, cause inefficiency.

A patent with publication number CN106142834A proposes a printing quality detection machine, which includes a paper feeding system, a detection platform, a delivery conveying system and two delivery mechanisms; the delivery conveying system comprises delivery gripper bars, fixed touch parts, movable touch parts and a driving device, the delivery gripper bars move along an annular track, the two delivery mechanisms are arranged below the moving track of the delivery gripper bars, the fixed touch parts and the movable touch parts are sequentially away from the detection system along the conveying direction of the delivery gripper bars and are respectively positioned above one delivery mechanism, the movable touch parts have two postures, the driving device is connected with the movable touch parts, and the detection system is in communication connection with the driving device; although this patent can be collected the printed matter of different masses, can not solve when getting the printed matter, the problem of printed matter adhesion, can not arrange the printed matter that detects simultaneously in order, can not detect the printed matter of not unidimensional.

SUMMERY OF THE UTILITY MODEL

Aiming at the technical problem, the utility model provides a printed matter defect detection device based on machine vision, which comprises a detection assembly, a material taking assembly, a material storage assembly and a driving assembly, wherein the detection assembly is used for detecting defects of printed matters; the detection assembly comprises a supporting unit and a detection unit, and the detection unit is arranged in the supporting unit; the material storage assemblies are provided with a plurality of groups, and the plurality of groups of material storage assemblies are respectively arranged at two ends of the supporting unit; the material storage assembly comprises a storage plate and a push plate unit used for pushing the printed matters in order, the push plate unit is arranged in the supporting unit, and the storage plate is arranged on the push plate unit; get the material subassembly and include suction nozzle, lifting unit, adjustment unit and be used for preventing the vibration unit of printed matter adhesion, lifting unit installs on drive assembly, the adjustment unit sets up on lifting unit, vibrates the one end and the lifting unit of unit and is connected, vibrates the other end and the adjustment unit of unit and is connected, the suction nozzle is installed on the adjustment unit.

The lifting unit comprises a second air cylinder and a first connecting rod, the second air cylinder is installed on the driving assembly, the first connecting rod is fixedly installed on a piston rod of the second air cylinder, the third connecting rod is fixedly installed on the first connecting rod, the adjusting unit comprises a second connecting rod, a first connecting block, a supporting plate, a bolt, a first spring and a first connecting frame, the bolt and the first connecting frame are both installed on the first connecting rod in a sliding mode, a spring is sleeved on the bolt, one end of the first spring is connected with the bolt, the other end of the first spring is connected with the first connecting rod, the supporting plate is installed on the oscillating unit, a plurality of sliding grooves are formed in the supporting plate, the first connecting block is installed in the sliding grooves of the supporting plate in a sliding mode, the suction nozzle is installed on the first connecting block, one end of the second connecting rod is hinged with the first connecting block, the other end of the second connecting rod is hinged with the first connecting frame, and a plurality of arc-shaped grooves are formed in the first connecting frame, the upper and lower ends of the arc-shaped groove are provided with right-angle clamping grooves, and the supporting plate is provided with a sensor.

The shock unit comprises a connecting pin and a second spring, the connecting pin is slidably mounted in the third connecting rod, the supporting plate is mounted on the connecting pin, the second spring is sleeved on the connecting pin, one end of the second spring is connected with the supporting plate, the other end of the second spring is connected with the third connecting rod, the second connecting rod, the first connecting block, the suction nozzle, the bolt and the first spring are all provided with multiple groups, a sensor is arranged on the second spring, and a clamping ring used for preventing falling is arranged on the connecting pin.

Further, the support unit includes support frame and track board, the track board is installed in the support frame, and the track board is provided with two sets ofly, be provided with rectangular shape spout in the track board, be provided with the sensor that is used for detecting the stroke on the track board.

Further, the detection unit comprises a first visual detection device, a jig frame, a first air cylinder and a second visual detection device, wherein the first visual detection device, the first air cylinder and the second visual detection device are all installed in the support frame, the jig frame is slidably installed in the support frame, the jig frame is connected with a piston rod of the first air cylinder, the first air cylinder is provided with two groups, a suction plate is arranged on the jig frame, a plurality of groups of suction holes are formed in the suction plate, and sensors are arranged on the first visual detection device, the first air cylinder and the second visual detection device.

Further, the push pedal unit includes push pedal, motor one, deflector, link two, connecting rod four, connecting block two, lead screw one, splint and spring three, motor one and the equal fixed mounting of deflector are in the support frame, two slidable mounting of link are on the deflector, deposit board fixed mounting on the deflector, be provided with a plurality of spouts on the board of depositing, two slidable mounting of connecting block are in depositing the spout on the board, a fixed mounting of lead screw is on the output shaft of motor one, lead screw one and link two cross threaded connection, lead screw one and storage plate rotate to be connected, and the one end of connecting rod four is articulated with link two, and the other end of connecting rod four is articulated with link two, splint pass through spring three and install on connecting block two.

Further, push pedal, connecting rod four, connecting block two and spring three all are provided with the multiunit, are provided with two sets of splint on every connecting block two of group, push pedal detachable installs between two sets of splint, be provided with the multiunit suction hole on the board of depositing.

Further, drive assembly includes two lead screws, two motors, sliding shaft, three motors, three lead screws, three connecting blocks and guide rods, sliding shaft slidable mounting is in the spout of track board, two fixed mounting of motors are on the support frame, two fixed mounting of lead screws are on the output shaft of two motors, two lead screws pass through threaded connection with the sliding shaft, two lead screws rotate with the support frame and are connected, guide rod fixed mounting is on the sliding shaft, three slidable mounting of connecting blocks are on the guide rods, three fixed mounting of motors are on the sliding shaft, three fixed mounting of lead screws are on the output shaft of three motors, three lead screws rotate with the sliding shaft and are connected, three connecting blocks and three lead screw tees cross threaded connection, three connecting blocks and two cylinder fixed connection.

Compared with the prior art, the utility model has the beneficial effects that: (1) the detection assembly can detect the front side and the back side of a printed matter, and ensures the detection comprehensiveness; (2) the oscillating unit can oscillate during material taking, so that the problem of taking more printed matters due to adhesion during material taking is solved, and meanwhile, the distance between the suction nozzles can be adjusted through the adjusting unit so as to adapt to the printed matters with different sizes; (3) the storage plate can be detached, so that the printed matters can be conveniently stored and taken.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the overall structure of the present invention.

FIG. 3 is a schematic structural diagram of a detecting assembly according to the present invention.

Fig. 4 is a partial structural diagram of the first embodiment of the present invention.

Fig. 5 is a schematic view of a take-off assembly according to the present invention.

FIG. 6 is an enlarged view of the structure at A in FIG. 5 according to the present invention.

FIG. 7 is an enlarged view of the structure at B in FIG. 5 according to the present invention.

Fig. 8 is a top view of the first connecting frame of the present invention.

Fig. 9 is a cross-sectional view of a first connector of the present invention.

FIG. 10 is a schematic view of the material storage assembly according to the present invention.

FIG. 11 is a partial structural view of the material storage assembly according to the present invention.

Figure 12 is a top view of the inventory assembly of the present invention.

FIG. 13 is an enlarged view of the structure of FIG. 12 at C according to the present invention.

Figure 14 is a cross-sectional view of the holding assembly of the present invention.

Fig. 15 is a schematic structural view of a second connecting block of the utility model.

Reference numerals: 1-a detection component; 2-a material taking assembly; 3-a stock component; 4-a drive assembly; 101-a support frame; 102-a track slab; 103-a first visual detection device; 104-a jig frame; 105-a first cylinder; 106-a second visual detection device; 201-cylinder two; 202-connecting rod one; 203-connecting rod two; 204-connecting block one; 205-a suction nozzle; 206-a support plate; 207-a latch; 208-spring one; 209-link frame one; 210-connecting rod three; 211-connecting pins; 212-spring two; 301-a storage plate; 302-push plate; 303-motor one; 304-a guide plate; 305-link frame two; 306-connecting rod four; 307-connecting block two; 308-a first lead screw; 309-splint; 310-spring three; 401-screw rod two; 402-motor two; 403-sliding shaft; 404-motor three; 405-lead screw III; 406-connecting block three; 407-guide bar.

Detailed Description

The present invention will be further described with reference to specific embodiments, illustrative examples and illustrations of the utility model herein are provided to explain the present invention and are not intended to limit the utility model.

Example (b): as shown in fig. 1, 2, 5 and 10, a printed matter defect detection device based on machine vision comprises a detection assembly 1 for detecting defects of printed matters, a material taking assembly 2 for taking and placing the printed matters, a material storing assembly 3 for storing the printed matters and a driving assembly 4 for driving the material taking assembly 2 to move, wherein the material storing assembly 3 and the driving assembly 4 are both installed in the detection assembly 1, and the material taking assembly 2 is installed on the driving assembly 4; the detection assembly 1 comprises a supporting unit and a detection unit, wherein the detection unit is arranged in the supporting unit; the material storage assemblies 3 are provided with a plurality of groups, and the plurality of groups of material storage assemblies 3 are respectively arranged at two ends of the supporting unit; the material storage assembly 3 comprises a storage plate 301 and a push plate unit used for pushing the printed matters in order, the push plate unit is arranged in the supporting unit, and the storage plate 301 is arranged on the push plate unit; get material subassembly 2 and include suction nozzle 205, the lift unit, the adjustment unit and be used for preventing the vibration unit of printed matter adhesion, the lift unit is installed on drive assembly 4, the adjustment unit setting is on the lift unit, the one end and the lift unit of vibrating the unit are connected, the other end and the adjustment unit of vibrating the unit are connected, suction nozzle 205 installs on the adjustment unit.

As shown in fig. 2, fig. 3 and fig. 4, the supporting unit includes a supporting frame 101 and a track plate 102, the track plate 102 is installed in the supporting frame 101, the track plate 102 is provided with two sets of track plates 102, a strip-shaped chute is provided in the track plate 102, a sensor for detecting a stroke is provided on the track plate 102, the detecting unit includes a first visual detection device 103, a jig frame 104, a first cylinder 105 and a second visual detection device 106, the first visual detection device 103, the first cylinder 105 and the second visual detection device 106 are all installed in the supporting frame 101, the jig frame 104 is slidably installed in the supporting frame 101, the jig frame 104 is connected to a piston rod of the first cylinder 105, the first cylinder 105 is provided with two sets, a suction plate is provided on the jig frame 104, a plurality of suction holes are provided on the suction plate, and sensors are provided on the first visual detection device 103, the first cylinder 105 and the second visual detection device 106.

As shown in fig. 1, 2, 5, 6, 7, 8 and 9, the lifting unit includes a second cylinder 201 and a first connecting rod 202, the second cylinder 201 is installed on the driving assembly 4, the first connecting rod 202 is fixedly installed on a piston rod of the second cylinder 201, a third connecting rod 210 is fixedly installed on the first connecting rod 202, the adjusting unit includes a second connecting rod 203, a first connecting block 204, a supporting plate 206, a pin 207, a first spring 208 and a first connecting frame 209, the pin 207 and the first connecting frame 209 are both slidably installed on the first connecting rod 202, the first spring 208 is sleeved on the pin 207, one end of the first spring 208 is connected with the pin 207, the other end of the first spring 208 is connected with the first connecting rod 202, the supporting plate 206 is installed on the oscillating unit, the supporting plate 206 is provided with a plurality of sliding grooves, the first connecting block 204 is slidably installed in the sliding groove of the supporting plate 206, the suction nozzle 205 is installed on the first connecting block 204, one end of the second connecting rod 203 is hinged with the first connecting block 204, the other end of the second connecting rod 203 is hinged to the first connecting frame 209, a plurality of arc-shaped grooves are formed in the first connecting frame 209, the upper end and the lower end of each arc-shaped groove are provided with right-angle clamping grooves, and a sensor is arranged on the supporting plate 206.

As shown in fig. 5, 6 and 7, the oscillating unit includes a connecting pin 211 and a second spring 212, the connecting pin 211 is slidably mounted in a third connecting rod 210, the supporting plate 206 is mounted on the connecting pin 211, the second spring 212 is sleeved on the connecting pin 211, one end of the second spring 212 is connected to the supporting plate 206, the other end of the second spring 212 is connected to the third connecting rod 210, a plurality of groups of the second connecting rod 203, the first connecting block 204, the suction nozzle 205, the plug pin 207 and the first spring 208 are provided, a sensor is provided on the second spring 212, and a snap ring for preventing falling is provided on the connecting pin 211.

As shown in fig. 2, 3, 4, 10, 11, 12, 13, 14 and 15, the push plate unit includes a push plate 302, a first motor 303, a guide plate 304, a second connecting frame 305, a fourth connecting rod 306, a second connecting block 307, a first lead screw 308, a clamp plate 309 and a third spring 310, the first motor 303 and the guide plate 304 are both fixedly installed in the support frame 101, the second connecting frame 305 is slidably installed on the guide plate 304, the storage plate 301 is fixedly installed on the guide plate 304, the storage plate 301 is provided with a plurality of sliding slots, the second connecting block 307 is slidably installed in the sliding slot on the storage plate 301, the first lead screw 308 is fixedly installed on the output shaft of the first motor 303, the first lead screw 308 and the second connecting frame 305 are connected by screw threads, the first lead screw 308 and the storage plate 301 are rotatably connected, one end of the fourth connecting rod 306 is hinged to the second connecting frame 305, the other end of the fourth connecting rod 306 is hinged to the second connecting block 307, the clamp plate 309 is installed on the second connecting block 307 by the third spring 310, the push plate 302, the four connecting rods 306, the two connecting blocks 307 and the three springs 310 are all provided with multiple groups, two groups of clamping plates 309 are arranged on the two connecting blocks 307 of each group, the push plate 302 is detachably arranged between the two groups of clamping plates 309, and multiple groups of air suction holes are formed in the storage plate 301.

As shown in fig. 1, 2, 3, 4 and 5, wherein the driving assembly 4 comprises a second lead screw 401 and a second motor 402, the sliding shaft 403 is slidably mounted in a sliding groove of the track plate 102, the motor II 402 is fixedly mounted on the support frame 101, the screw II 401 is fixedly mounted on an output shaft of the motor II 402, the screw II 401 is in threaded connection with the sliding shaft 403, the screw II 401 is rotatably connected with the support frame 101, the guide rod 407 is fixedly mounted on the sliding shaft 403, the connecting block III 406 is slidably mounted on the guide rod 407, the motor III 404 is fixedly mounted on the sliding shaft 403, the screw III 405 is fixedly mounted on an output shaft of the motor III 404, the screw III 405 is rotatably connected with the sliding shaft 403, the connecting block III 406 is in threaded connection with the screw III 405, and the connecting block III 406 is fixedly connected with the air cylinder II 201.

The working principle of the utility model is as follows: initially, according to the interval between a plurality of suction nozzles 205 of the size adjustment of survey printed matter, when adjusting the interval, manual compression bolt 207, spring 208 compresses, promote link one 209, when promoting link one 209, link one 209 drives link block one 204 through connecting rod two 203 and slides in the spout of backup pad 206, link block one 204 drives suction nozzle 205 and slides, select during the arc wall that suitable bolt 207 inserted on link one 209 according to the size needs of printed matter, the right angle draw-in groove on the arc wall blocks bolt 207, thereby make the interval adjustment between a plurality of suction nozzles 205 to required size.

The material storage component 3 at one end of the supporting unit is used for storing presswork to be detected, the material storage component 3 at the other end of the supporting unit is used for storing presswork to be detected, the material storage components 3 used for storing presswork to be detected are provided with a plurality of groups, one group is used for storing qualified products, the rest is used for storing unqualified products, the push plate 302 used for storing the presswork to be detected on the material storage component 3 is pulled out manually, a plurality of presswork to be detected are stacked on the storage plate 301, the air suction holes on the storage plate 301 suck the presswork, then the push plate 302 is inserted between two groups of clamping plates 309 on the connecting block two 307, the motor one 303 is started, the output shaft of the motor one 303 drives the connecting frame two 305 to slide on the guide plate 304 through the lead screw one 308, the connecting frame two 305 drives the connecting block two 307 to slide in the storage plate 301 through the connecting rod four 306, the connecting block two 307 drives the groups of push plates 302 to be folded, when the push plates 302 are folded, the plurality of stacked printed matters on the storage plate 301 are pushed to be tidy, and the output shaft of the motor I303 rotates reversely, so that the plurality of push plates 302 are separated (the working principle refers to that when the push plates 302 are folded in front), and the second connecting frame 305 is closed.

Starting a second motor 402, driving a sliding shaft 403 to slide in a sliding groove on the track plate 102 by an output shaft of the second motor 402 through a second lead screw 401, enabling the sliding shaft 403 to slide on the track plate 102 above the material storage component 3 storing the printed matter to be detected (induced by a sensor on the track plate 102), turning off the second motor 402, starting a third motor 404, driving a third connecting block 406 to slide on a guide rod 407 by an output shaft of the third motor 404 through a third lead screw 405, driving the material taking component 2 to move by the third connecting block 406, turning off the third motor 404 when the material taking component 2 moves right above the material storage component 3 storing the printed matter to be detected (induced by a sensor on the supporting plate 206), starting a second air cylinder 201, driving a third connecting rod 210 to descend by a piston rod of the second air cylinder 201 through a first connecting rod 202, driving the supporting plate 206 to descend through a connecting pin 211, driving the suction nozzle 205 to descend by the supporting plate 206 through a first connecting block 204, so that the suction nozzle 205 descends to the printed matter, the suction nozzle 205 sucks the printed matter, the piston rod of the air cylinder II 201 continuously drives the connecting rod I202 to descend, the suction nozzle 205 and the supporting plate 206 cannot descend continuously due to the fact that the suction nozzle 205 presses the printed matter, at the moment, the plug pin 207 slides in the arc-shaped groove in the connecting frame I209 when the connecting rod I202 descends, when the connecting rod I202 drives the connecting rod III 210 to descend continuously, the connecting rod III 210 slides on the connecting pin 211, the spring II 212 compresses, after the set distance is compressed, the sensor on the spring II 212 sends a signal, at the moment, the piston rod of the air cylinder II 201 drives the connecting rod I202 to move reversely, the connecting rod I202 drives the connecting rod III 210 to move reversely, at the moment, the spring II 212 drives the supporting plate 206 to rebound and descend through elasticity, the supporting plate 206 drives the connecting pin 211 to rebound, the connecting pin 211 touches the connecting rod III 210 to enable the supporting plate 206 to vibrate, in order to guarantee that suction nozzle 205 adsorbs a printed matter only (can be shaken because of frictional force or static lead to the printed matter adhesion that adsorbs with suction nozzle 205), when connecting rod 202 reverse movement, bolt 207 slides in the arc wall on link 209, when sliding on the right angle draw-in groove, the right angle draw-in groove blocks bolt 207, the piston rod of cylinder two 201 continues to drive connecting rod 202 and rises, behind the initial position that connecting rod 202 rises, drive assembly 4 drives and gets material subassembly 2 and remove to the detecting element position (drive assembly 4 drives the theory of operation of getting material subassembly 2 and refers ahead), at this moment, the promotion unit pushes away neatly (the theory of operation of promotion refers ahead) the printed matter that detects.

When the driving component 4 drives the material taking component 2 to move right above the second visual detection device 106, the sensor on the track plate 102 sends a signal, the driving component 4 stops moving, the second visual detection device 106 detects one surface of a printed matter on the suction nozzle 205, after the detection is finished, the sensor on the second visual detection device 106 sends a signal to start the air cylinder 105, the piston rod of the air cylinder 105 drives the jig frame 104 to completely move out from the lower part of the first visual detection device 103, the air cylinder 105 stops moving, the motor three 404 is started, the output shaft of the motor three 404 drives the connecting block three 406 to move right above the jig frame 104 through the screw rod three 405, the piston rod of the air cylinder two 201 drives the connecting rod three 210 to descend through the connecting rod one 202, the connecting rod three 210 drives the supporting plate 206 to descend through the connecting pin 211, the supporting plate 206 drives the suction nozzle 205 to descend through the connecting block one 204, the suction nozzle 205 drives the printed matter to descend onto the air suction plate on the jig frame 104, the air suction hole on the air suction plate sucks air, at the moment, the suction nozzle 205 stops sucking air, so that the printed matter falls onto the air suction plate on the jig frame 104, the piston rod of the first air cylinder 105 drives the jig frame 104 to move in the reverse direction to be right below the first visual detection device 103, the first visual detection device 103 detects the other side of the printed matter, the first air cylinder 105 moves in the reverse direction to move the jig frame 104 out of the position below the first visual detection device 103, the suction nozzle 205 sucks the printed matter, according to the detection result, the driving assembly 4 drives the printed matter to move through the material taking assembly 2, the printed matter is placed on the corresponding material storage assembly 3 for storing the detected printed matter, after all the printed matter to be detected is detected, the push plate 302 on the material storage assembly 3 for storing the detected printed matter pushes the detected printed matter in order (refer to the principle of pushing in order), in order to solve the problem that a plurality of printed matters are not neat due to stacking, then the push plate 302 is pulled down manually, and the printed matters which are detected are taken out.

Claims (6)

1. A machine vision-based printed matter defect detection apparatus comprising a detection assembly (1) for detecting printed matter defects, characterized by further comprising: the device comprises a material taking assembly (2) for taking and placing the printed matters, a material storing assembly (3) for storing the printed matters and a driving assembly (4) for driving the material taking assembly (2) to move, wherein the material storing assembly (3) and the driving assembly (4) are both arranged in a detection assembly (1), and the material taking assembly (2) is arranged on the driving assembly (4); the detection assembly (1) comprises a supporting unit and a detection unit, and the detection unit is arranged in the supporting unit; the material storage assemblies (3) are provided with a plurality of groups, and the plurality of groups of material storage assemblies (3) are respectively arranged at two ends of the supporting unit; the material storage assembly (3) comprises a storage plate (301) and a push plate unit used for pushing printed matters in order, the push plate unit is installed in the supporting unit, and the storage plate (301) is installed on the push plate unit; the material taking assembly (2) comprises a suction nozzle (205), a lifting unit, an adjusting unit and a vibrating unit for preventing printed matters from being adhered, the lifting unit is installed on the driving assembly (4), the adjusting unit is arranged on the lifting unit, one end of the vibrating unit is connected with the lifting unit, the other end of the vibrating unit is connected with the adjusting unit, and the suction nozzle (205) is installed on the adjusting unit;

the lifting unit comprises a second cylinder (201) and a first connecting rod (202), the second cylinder (201) is installed on the driving assembly (4), the first connecting rod (202) is fixedly installed on a piston rod of the second cylinder (201), a third connecting rod (210) is fixedly installed on the first connecting rod (202), the adjusting unit comprises a second connecting rod (203), a first connecting block (204), a supporting plate (206), a plug pin (207), a first spring (208) and a first connecting frame (209), the plug pin (207) and the first connecting frame (209) are both slidably installed on the first connecting rod (202), the first spring (208) is sleeved on the plug pin (207), one end of the first spring (208) is connected with the plug pin (207), the other end of the first spring (208) is connected with the first connecting rod (202), the supporting plate (206) is installed on the oscillating unit, a plurality of sliding grooves are formed in the supporting plate (206), the first connecting block (204) is slidably mounted in a sliding groove of the supporting plate (206), the suction nozzle (205) is mounted on the first connecting block (204), one end of the second connecting rod (203) is hinged to the first connecting block (204), the other end of the second connecting rod (203) is hinged to the first connecting frame (209), a plurality of arc-shaped grooves are formed in the first connecting frame (209), right-angle clamping grooves are formed in the upper ends and the lower ends of the arc-shaped grooves, and a sensor is arranged on the supporting plate (206);

the shock unit includes connecting pin (211) and spring two (212), connecting pin (211) slidable mounting is in connecting rod three (210), install on connecting pin (211) backup pad (206), spring two (212) cover is established on connecting pin (211), and the one end and the backup pad (206) of spring two (212) are connected, and the other end and the connecting rod three (210) of spring two (212) are connected, connecting rod two (203), connecting block one (204), suction nozzle (205), bolt (207) and spring one (208) all are provided with the multiunit, are provided with the sensor on spring two (212), are provided with the snap ring that is used for preventing to drop on connecting pin (211).

2. The machine vision-based print defect inspection apparatus of claim 1, wherein: the supporting unit comprises a supporting frame (101) and track plates (102), wherein the track plates (102) are installed in the supporting frame (101), two groups of track plates (102) are arranged, elongated sliding grooves are formed in the track plates (102), and sensors for detecting strokes are arranged on the track plates (102).

3. A machine vision based print defect inspection apparatus as claimed in claim 2 wherein: the detection unit comprises a first visual detection device (103), a fixture frame (104), a first cylinder (105) and a second visual detection device (106), wherein the first visual detection device (103), the first cylinder (105) and the second visual detection device (106) are all installed in the support frame (101), the fixture frame (104) is slidably installed in the support frame (101), the fixture frame (104) is connected with a piston rod of the first cylinder (105), the first cylinder (105) is provided with two sets of cylinders, a suction plate is arranged on the fixture frame (104), a plurality of groups of suction holes are formed in the suction plate, and sensors are arranged on the first visual detection device (103), the first cylinder (105) and the second visual detection device (106).

4. A machine vision based print defect inspection apparatus as claimed in claim 2 wherein: the push plate unit comprises a push plate (302), a first motor (303), a guide plate (304), a second connecting frame (305), a fourth connecting rod (306), a second connecting block (307), a first lead screw (308), a clamping plate (309) and a third spring (310), wherein the first motor (303) and the guide plate (304) are fixedly installed in the support frame (101), the second connecting frame (305) is slidably installed on the guide plate (304), the storage plate (301) is fixedly installed on the guide plate (304), the storage plate (301) is provided with a plurality of sliding grooves, the second connecting block (307) is slidably installed in the sliding grooves in the storage plate (301), the first lead screw (308) is fixedly installed on an output shaft of the first motor (303), the first lead screw (308) is connected with the second connecting frame (305) through threads, the first lead screw (308) is rotatably connected with the storage plate (301), one end of the fourth connecting rod (306) is hinged with the second connecting frame (305), the other end of the connecting rod IV (306) is hinged with the connecting block II (307), and the clamping plate (309) is installed on the connecting block II (307) through a spring III (310).

5. The machine vision-based print defect inspection apparatus of claim 4, wherein: push pedal (302), connecting rod four (306), connecting block two (307) and spring three (310) all are provided with the multiunit, are provided with two sets of splint (309) on every connecting block two (307), push pedal (302) detachable installs between two sets of splint (309), be provided with the multiunit suction hole on depositing board (301).

6. A machine vision based print defect inspection apparatus as claimed in claim 2 wherein: the driving assembly (4) comprises a second screw rod (401), a second motor (402), a sliding shaft (403), a third motor (404), a third screw rod (405), a third connecting block (406) and a guide rod (407), the sliding shaft (403) is slidably mounted in a sliding groove of the track plate (102), the second motor (402) is fixedly mounted on the support frame (101), the second screw rod (401) is fixedly mounted on an output shaft of the second motor (402), the second screw rod (401) is in threaded connection with the sliding shaft (403), the second screw rod (401) is rotatably connected with the support frame (101), the guide rod (407) is fixedly mounted on the sliding shaft (403), the third connecting block (406) is slidably mounted on the guide rod (407), the third motor (404) is fixedly mounted on the sliding shaft (403), and the third screw rod (405) is fixedly mounted on an output shaft of the third motor (404), the third lead screw (405) is rotatably connected with the sliding shaft (403), the third connecting block (406) is connected with the third lead screw (405) through threads, and the third connecting block (406) is fixedly connected with the second air cylinder (201).

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