Screening equipment for detecting edge flatness of ceramic tiles

Abstract

The invention relates to the technical field of ceramic tile production and processing, in particular to screening equipment for detecting the edge flatness of ceramic tiles. A detection unit is arranged on the base, the detection unit is used for detecting the edge flatness of a ceramic tile, the detection unit comprises two pressing frames moving in the horizontal direction, the two pressing frames move synchronously, the moving directions are always opposite, two pressing wheels are arranged on each pressing frame, and the two pressing wheels are in rolling fit with the edge of the ceramic tile; the two pressing wheels are arranged in the conveying direction of the ceramic tiles, the axes of the pressing wheels are perpendicular to the horizontal plane, the two pressing wheels and the pressing frame form a detection groove, the opening side of the detection groove faces the edges of the ceramic tiles, a laser leveling instrument is horizontally arranged in the detection groove, and a pressing unit capable of driving the pressing frame to move in the horizontal direction is arranged on one side of the pressing frame. According to the invention, the accuracy of edge flatness detection is improved, and the equipment is ensured to adapt to large-scale detection operation.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic tile production and processing, and in particular to a screening device for detecting the flatness of ceramic tile edges. Background Art

[0002] After the production process of ceramic tiles is completed, they need to be packaged to avoid scratching the tile surface during transportation. However, the damaged tiles need to be screened out before packaging. Because the production process of tiles is relatively complicated and cumbersome, it is inevitable that there will be damage or damage during the production and processing of tiles. The damaged tiles do not meet the production quality requirements and need to be picked out. However, the current process of selecting tiles is mostly done manually by naked eye observation. This screening method not only requires a lot of manpower, but also has low screening efficiency.

[0003] Chinese patent CN113532551B discloses a tile screening device, including a first support plate arranged transversely, a second support plate arranged transversely and parallel to the first support plate above the first support plate, the glaze detection component and the edge detection component arranged transversely side by side between the first support plate and the second support plate, the screening device also includes a transport component, the transport component is used to transport the tiles from the glaze detection component toward the edge detection component, the screening device also includes detection components respectively distributed on the glaze detection component and the edge detection component, the detection component arranged on the glaze detection component is used to detect the flatness of the tile detection surface, and the detection component arranged on the edge detection component is used to detect the flatness of the tile detection surface. The detection part on the detection component is used to detect the flatness of the edge of the tile detection surface. The edge detection component includes a transversely arranged conveying plate. The width direction of the conveying plate is perpendicular to the transmission direction of the transport component. Telescopic parts are symmetrically arranged on both sides of the width direction of the conveying plate. The telescopic parts each include a telescopic plate. The two telescopic plates of the two telescopic parts are arranged in parallel on both sides of the width direction of the conveying plate. Two clamping detection components for detecting the edge of the tile are arranged at both ends of the telescopic plate away from the conveying plate. The four clamping detection components of the two telescopic parts are symmetrically arranged on both sides of the width direction of the conveying plate. The edge detection component also includes a steering component for steering the tiles.

[0004] The above scheme uses a clamp to detect the side of the tile, but during the detection, the clamp needs to contact the side of the tile, which makes the tile unable to move smoothly and the detection efficiency is low. In addition, there are usually two situations on the side of the tile after processing. One is that impurities are attached, resulting in foreign matter protruding from the side of the tile. The other is that during the edge grinding process of the tile, the surface of the tile is cracked, that is, the side of the tile will appear concave at this time. If a clamp is used to clamp and measure the side of the tile, it is easy to get stuck, and because the tile has four sides.

[0005] In the prior art, two detection methods are used to detect the four sides of the tile. One is that the tile is transported to the detection unit, the detection unit first detects two sides of the tile, then the detection unit rotates 90 degrees, and then detects the other two sides of the tile; the second is to set two detection units on the same conveyor line. The widths of the two detection units are different. The tile needs to pass through the two detection units in sequence before the four sides can be detected. However, the tile needs to stop moving when it moves from the first detection unit to the second detection unit, and then the tile needs to be rotated 90 degrees before it can be sent to the second detection unit. This is inefficient. If the robot is used to detect the tile between the two detection units, the detection unit will be automatically detected. When the moving tiles are rotated at an angle, they are prone to accidental falling and have poor stability. At the same time, if the tiles are in a continuous conveying state during detection, the detection unit needs to be withdrawn from the side of the tile after completing the detection of one tile, otherwise after the second tile arrives, the detection unit will hinder the arriving tile. And if a laser level meter is used to detect the side of the tile, in order to ensure accuracy, it is necessary to block external light as much as possible. However, the sides of some tiles are uneven, so a fixed shielding cover cannot be set on the side of the tile, otherwise the raised part of the tile side will scratch the shielding cover, and more light will flow into the recessed part of the tile side. Summary of the invention

[0006] In view of the above problems, a screening device for detecting the flatness of the edges of tiles is provided. When performing the detection, the tiles are first placed on the upper part of the conveying unit in sequence, and the conveying unit drives the tiles to move along the length direction of the base. The tiles placed on the conveying unit are driven by the conveying unit to move toward the detection unit. Since the length and width of the tiles to be detected are known, the standard length and width of the tiles need to be input into the device before the detection, and a detection threshold is set. When the monitored value exceeds the set detection threshold, it is determined that there is a bulge or depression. Two detection units are arranged along the length direction of the base, and the two detection units can respectively detect the four edges of the tiles. The inspection is performed, that is, each inspection unit can inspect two parallel edges of the tile when the tile is conveyed. A rotating unit is arranged between the two inspection units. When the tile is output from the first inspection unit, the rotating unit rotates the tile 90 degrees. The tile is in a moving state during the rotation. Then the tile is inspected by the second inspection unit. In this way, the inspection is completed. A manipulator is arranged on one side of the output end of the conveying unit. The manipulator places qualified tiles and unqualified tiles respectively according to the inspection results. When the inspection unit inspects the edge of the tile, taking one of the inspection units as an example, the horizontal distance between the corresponding pressing wheels on the two pressing frames is the same as the distance between the pressing wheels to be measured. The standard side lengths of the measured tiles are the same. At this time, the pressing unit does not provide pressing force to the pressing frame and locks the pressing frame. The pressing frame cannot move horizontally. A camera for monitoring the moving tiles is arranged on the upper part of the detection unit. When the camera detects that the tile has reached the position of the detection unit, the pressing unit is started, and the pressing unit provides pressing force to the pressing frame, so that the pressing frame drives the pressing wheel to press on the edge of the tile. It is worth noting that the two pressing units corresponding to the two pressing frames are started at the same time, so that the two pressing frames can press on the edge of the tile at the same time. The pressing frame and the pressing wheel form a detection groove. The pressing wheel contacts the edge of the tile to ensure that when there is a When the tile is raised, the pressing wheel can pass through the raised part of the edge of the tile smoothly without getting stuck. Since the pressing frame equipped with the pressing wheel is always in contact with the edge of the tile under the action of the pressing unit, the opening of the detection groove formed by the pressing wheel and the pressing frame will be blocked by the edge of the tile. Therefore, the light from the outside that can enter the detection groove is limited. Therefore, the laser level meter located in the detection groove can monitor the edge of the tile in real time, thereby ensuring the accuracy of the laser level meter. The detection principles of the two detection units are the same, and the working principle of the other detection unit will not be repeated. At the same time, since the tile is in a conveying state during measurement, it is guaranteed that the equipment can adapt to large-scale detection operations.

[0007] In order to solve the problems of the prior art, the present invention provides a screening device for detecting the flatness of the edges of tiles, comprising a horizontally arranged base, on which a plurality of tiles are supported and conveyed along the length direction of the base; a detection unit is arranged on the base, and the detection unit is used to detect the flatness of the edges of the tiles, and the detection unit comprises two pressing frames moving in the horizontal direction, the two pressing frames move synchronously and in opposite directions during movement, each pressing frame is provided with two pressing wheels, the two pressing wheels are in rolling cooperation with the edges of the tiles, the two pressing wheels are arranged along the conveying direction of the tiles, and the axes of the pressing wheels are perpendicular to the horizontal plane, the two pressing wheels and the pressing frame form a detection groove, the opening side of the detection groove faces the edge of the tiles, a laser level meter is horizontally arranged in the detection groove, the monitoring end of the laser level meter faces horizontally to the edge of the tiles, a pressing unit capable of driving the pressing frame to move in the horizontal direction is arranged on one side of the pressing frame, and when the tiles pass one side of the pressing wheel, the pressing unit pushes the pressing frame so that the pressing wheels on the pressing frame are always in rolling cooperation with the edges of the tiles.

[0008] Preferably, the pressing unit includes a pushing tube, which is composed of a vertical tubular structure and a horizontal tubular structure. The pushing frame is slidably arranged at one end of the horizontal tubular structure. A pressing block is slidably arranged in the vertical tubular structure along the extension direction of the vertical tubular structure. A pushing cavity is present between the pressing block and the pressing frame, and hydraulic oil is present in the pushing cavity.

[0009] Preferably, a reset unit is also provided in the pushing tube, and the reset unit is located above the pressing block. The reset unit includes a limit block arranged in the vertical tubular structure, and the limit block is located above the pressing block. A pressure sensor is arranged on the side of the limit block facing the pressing block. An air cavity is provided in the pushing tube above the pressing block, and a reversing valve is provided on the side wall of the air cavity. The side of the reversing valve away from the air cavity is connected to a pump body, and when the pressure sensor detects pressure, the pump body stops running.

[0010] Preferably, the limit block is slidably arranged in the vertical tubular structure of the push tube in the vertical direction, and a driving unit for driving the limit block to move is arranged on the upper part of the limit block. The limit block has a lowest position in its vertical moving stroke. When the limit block is at the lowest position, it can position the pressing block that needs to be reset. After the positioning is completed, the limit block rises in the vertical direction.

[0011] Preferably, the driving unit includes a follower ring and a fixed ring arranged from top to bottom in the vertical direction. The fixed ring is fixedly arranged on the inner wall of the pushing tube. The follower ring moves in the pushing ring in the vertical direction, and the follower ring and the limit block rise and fall synchronously. The threaded rod passes through the fixed ring in the vertical direction and cooperates with the fixed ring thread. The two ends of the threaded rod are respectively connected to the follower ring and the limit block and rotate in cooperation.

[0012] Preferably, a rangefinder is vertically arranged on the upper part of the pressing block, the rangefinder is fixedly connected to the pushing tube, and the output end of the rangefinder vertically points to the upper part of the pressing block.

[0013] Preferably, two detection units are provided on the base along the length direction of the base, and the tiles moving on the base are detected by the two detection units in sequence. A rotating unit is provided between the two detection units, and the rotating unit is used to rotate the tiles 90 degrees. The rotating unit includes a support plate provided above the tiles, and a suction cup is provided below the tiles. The support plate and the suction cup move synchronously along the length direction of the base, and a plurality of magnetic sheets are evenly arranged around the axis of the suction cup at the bottom of the suction cup. A magnetic rotator is provided at the lower part of the suction cup, and the magnetic rotator drives the suction cup to rotate 90 degrees by attracting the magnetic sheets.

[0014] Preferably, two correction units are respectively provided on both sides of the base, and the correction unit is located between the two detection units. The correction unit includes a correction plate that moves along the width direction of the base, and a second linear drive for driving the correction plate to move is horizontally provided at one end of the correction plate. The correction unit corrects the ceramic tile after the rotation is completed.

[0015] Preferably, the rotating unit also includes a synchronization unit that drives the support plate and the suction cup to move synchronously along the length direction of the base. The driving speed of the synchronization unit is the same as the conveying speed of the conveying unit. The synchronization unit includes a bracket that moves along the length direction of the base. A second threaded rod penetrates the bracket along the length direction of the base. The second threaded rod is threadedly matched with the bracket. When the second threaded rod rotates, the bracket moves along the length direction of the base.

[0016] Preferably, a conveying unit is provided on the base, and the conveying unit includes a conveyor belt rotatably provided on the base, the upper part of the conveyor belt is used to receive the tiles, and a plurality of partition blocks are evenly distributed on the outer edge surface of the conveyor belt, and the extension direction of the partition blocks is parallel to the width direction of the conveyor belt.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. When testing, first place the tiles on the upper part of the conveying unit in turn, and the conveying unit will drive the tiles to move along the length direction of the base. The tiles placed on the conveying unit will move toward the detection unit under the drive of the conveying unit. Since the length and width of the tiles to be tested are known, the standard length and width of the tiles need to be input into the equipment before testing, and the detection threshold is set. When the monitored value exceeds the set detection threshold, it is determined that there is a bulge or depression. Two detection units are arranged along the length direction of the base. The two detection units can detect the four sides of the tiles respectively, that is, each detection unit can detect the four sides of the tiles when the tiles are transported. Two parallel edges of the tile are inspected, and a rotating unit is arranged between the two inspection units. When the tile is output from the first inspection unit, the rotating unit rotates the tile 90 degrees. The tile is in a moving state during the rotation, and then the tile is inspected by the second inspection unit. In this way, the inspection is completed. A manipulator is arranged on one side of the output end of the conveying unit. The manipulator places qualified tiles and unqualified tiles separately according to the inspection results. When the inspection unit inspects the edge of the tile, taking one of the inspection units as an example, the horizontal distance between the corresponding pressing wheels on the two pressing frames is the same as the standard side length of the tile to be measured. At this time The pressing unit does not provide pressing force to the pressing frame and locks the pressing frame, so that the pressing frame cannot move horizontally. A camera for monitoring the moving tiles is arranged on the upper part of the detection unit. When the camera detects that the tile has reached the position of the detection unit, the pressing unit is started, and the pressing unit provides pressing force to the pressing frame, so that the pressing frame drives the pressing wheel to press on the edge of the tile. It is worth noting that the two pressing units corresponding to the two pressing frames are started at the same time, so that the two pressing frames can press on the edge of the tile at the same time. The pressing frame and the pressing wheel form a detection groove, and the pressing wheel contacts the edge of the tile to ensure that when there is a protrusion on the edge of the tile, the pressing The wheel can smoothly pass through the raised part of the edge of the tile without getting stuck. Since the pressing frame equipped with the pressing wheel is always in contact with the edge of the tile under the action of the pressing unit, the opening of the detection groove formed by the pressing wheel and the pressing frame will be blocked by the edge of the tile. Therefore, the light from the outside that can enter the detection groove is limited. Therefore, the laser level meter located in the detection groove can monitor the edge of the tile in real time, thereby ensuring the accuracy of the laser level meter. The detection principles of the two detection units are the same, and the working principle of the other detection unit will not be repeated. At the same time, since the tiles are in a conveying state during measurement, it is guaranteed that the equipment can adapt to large-scale detection operations.

[0019] 2. A pressing block is arranged in the pressing unit to press the pressing frame, and the pressing force is exerted on the pressing frame by the gravity of the pressing block, thereby ensuring that the pressure of the pressing frame is constant and avoiding damage to the edge of the tile due to excessive pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A three-dimensional schematic diagram of a screening device for detecting the flatness of a tile edge.

[0021] Figure 2 The present invention is a three-dimensional schematic diagram of a screening device for detecting the flatness of a tile edge with the base removed.

[0022] Figure 3 It is a screening device for detecting the flatness of tile edges. Figure 2 A local enlarged schematic diagram of point A in the middle.

[0023] Figure 4 It is a screening device for detecting the flatness of tile edges. Figure 2 A local enlarged schematic diagram of point B in the middle.

[0024] Figure 5 The invention is a cutaway stereoscopic schematic diagram of a screening device for detecting the flatness of a tile edge with the base removed.

[0025] Figure 6 It is a screening device for detecting the flatness of tile edges. Figure 5 A partial enlarged schematic diagram of point C in the middle.

[0026] Figure 7 It is a screening device for detecting the flatness of tile edges. Figure 5 A partial enlarged schematic diagram of point D in the middle.

[0027] Figure 8 The present invention is a three-dimensional schematic diagram of a detection unit of a screening device for detecting the flatness of a tile edge.

[0028] Fig. 9 The present invention is a three-dimensional schematic diagram of a detection unit monomer of a screening device for detecting the flatness of a tile edge.

[0029] Fig.10 A three-dimensional schematic diagram of a detection unit of a screening device used to detect the flatness of tile edges Figure 1 .

[0030] Fig.11 It is a screening device for detecting the flatness of tile edges. Fig.10 A partial enlarged schematic diagram of point E in the middle.

[0031] Fig.12 A three-dimensional schematic diagram of a detection unit of a screening device used to detect the flatness of tile edges Figure 2 .

[0032] Fig.13 It is a screening device for detecting the flatness of tile edges. Fig.12 A partial enlarged schematic diagram of point F in the middle.

[0033] The numbers in the figure are:

[0034] 1. Base; 11. Conveying unit; 111. Conveying belt; 112. Separating block; 2. Ceramic tile; 3. Detection unit; 31. Pressing frame; 32. Pressing wheel; 33. Laser leveling instrument; 34. Pressing unit; 341. Pushing tube; 342. Pressing block; 343. First slide; 35. Reset unit; 351. Limiting block; 352. Air cavity; 353. Reversing valve; 354. Driving unit; 3541. Follow-up ring; 3542. Fixed ring; 3543. First threaded rod; 3544. First gear; 3545. Second gear Wheel; 3546, first rotary drive; 355, rangefinder; 4, rotating unit; 41, support plate; 411, first linear drive; 42, suction cup; 421, magnetic sheet; 43, magnetic rotator; 431, electromagnetic sheet; 44, extension tube; 441, switch valve; 45, gear ring; 46, third gear; 47, second rotary drive; 48, correction unit; 481, correction plate; 482, second linear drive; 49, synchronization unit; 491, bracket; 492, second threaded rod; 493, third rotary drive. DETAILED DESCRIPTION

[0035] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] Reference Figure 1 , Fig. 9 and Fig.10 :A screening device for detecting the flatness of the edge of a tile 2, comprising a horizontally arranged base 1, on which a plurality of tiles 2 are supported and the tiles 2 are transported along the length direction of the base 1; a detection unit 3 is arranged on the base 1, and the detection unit 3 is used to detect the flatness of the edge of the tile 2, and the detection unit 3 comprises two pressing frames 31 that move in the horizontal direction, the two pressing frames 31 move synchronously and in opposite directions during movement, and each pressing frame 31 is provided with two pressing wheels 32, the two pressing wheels 32 roll with the edge of the tile 2, and the two pressing wheels 32 move along the length direction of the tile 2. The tiles 2 are arranged in the conveying direction, and the axis of the pressing wheel 32 is perpendicular to the horizontal plane. The two pressing wheels 32 and the pressing frame 31 form a detection groove, and the open side of the detection groove faces the edge of the tile 2. A laser level meter 33 is horizontally arranged in the detection groove, and the monitoring end of the laser level meter 33 is horizontally facing the edge of the tile 2. A pressing unit 34 that can drive the pressing frame 31 to move in the horizontal direction is arranged on one side of the pressing frame 31. When the tile 2 passes by one side of the pressing wheel 32, the pressing unit 34 pushes the pressing frame 31, so that the pressing wheel 32 on the pressing frame 31 is always in rolling cooperation with the edge of the tile 2.

[0037] A conveying unit 11 is provided on the base 1. The conveying unit 11 is a belt conveyor. A limiting mechanism is provided on the conveying unit 11. The limiting mechanism limits the ceramic tile 2 on the conveying unit 11, thereby ensuring that the ceramic tile 2 will not deviate or fall during the conveying process. Since the limiting mechanism is a prior art, it will not be described here. When the ceramic tile 2 is traditionally inspected, the ceramic tile 2 needs to be placed on the conveying unit 11 first, and then the conveying unit 11 transports the ceramic tile 2 to the inspection unit 3. In the prior art, there are mainly two methods for detecting the edge of the ceramic tile 2, one is contact detection, and the other is non-contact detection. When contact detection is adopted, the detection wheel is usually in contact with the edge of the moving ceramic tile 2, but this method can only detect the convex part of the edge of the ceramic tile 2. If there is a concave part on the edge of the ceramic tile 2, the detection wheel will not be used. If there is a sinking situation, the contact detection method is not easy to detect. If a non-contact detection method is used, it is necessary to use a laser level meter 33 for detection. However, the traditional installation method is usually to place the laser level meter 33 on one side of the moving path of the tile 2. Then, when the tile 2 passes through the laser level meter 33, the laser level meter 33 can emit a laser and judge the flatness of the edge of the tile 2 by the reflected laser. However, this method needs to avoid external light interference. In this way, a light-isolating cover is required on the upper part of the entire device, but the cover needs to be long enough, otherwise the light will still interfere with the laser level meter 33, which will increase the size of the device and occupy a larger area. Due to the unevenness of the edge of the tile 2, the laser level meter 33 cannot be too close to the edge of the tile 2 during detection.

[0038] In order to solve the above problems, the detection unit 3 is improved. The specific working principle is as follows. When performing detection, the tiles 2 are first placed on the upper part of the conveying unit 11 in sequence, and the conveying unit 11 drives the tiles 2 to move along the length direction of the base 1. The tiles 2 placed on the conveying unit 11 move toward the detection unit 3 under the drive of the conveying unit 11. Since the length and width of the tiles 2 to be detected are known, before detection, the standard length and width of the tiles 2 need to be input into the equipment, and the detection threshold is set. When the monitored value exceeds the set detection threshold, it is determined that there is a protrusion or depression. Two detection units 3 are arranged along the length direction of the base 1. The two detection units 3 can detect the four sides of the tiles 2 respectively. Each detection unit 3 can detect two parallel edges of the tile 2 when the tile 2 is conveyed. A rotating unit 4 is arranged between the two detection units 3. When the tile 2 is output from the first detection unit 3, the rotating unit 4 rotates the tile 2 90 degrees. The tile 2 is in a moving state during the rotation. Then the tile 2 is inspected by the second detection unit 3. In this way, the inspection is completed. A robot is arranged on one side of the output end of the conveying unit 11. The robot places qualified tiles 2 and unqualified tiles 2 respectively according to the inspection results. When the detection unit 3 detects the edge of the tile 2, taking one of the detection units 3 as an example, the horizontal distance between the corresponding pressing wheels 32 on the two pressing frames 31 is the same as the standard side length of the tile 2 to be measured. Similarly, at this time, the pressing unit 34 does not provide pressing force to the pressing frame 31 and locks the pressing frame 31, so that the pressing frame 31 cannot move horizontally. A camera for monitoring the moving tile 2 is arranged on the upper part of the detection unit 3. When the camera detects that the tile 2 reaches the position of the detection unit 3, the pressing unit 34 is started, and the pressing unit 34 provides pressing force to the pressing frame 31, so that the pressing frame 31 drives the pressing wheel 32 to press on the edge of the tile 2. It is worth noting that the two pressing units 34 corresponding to the two pressing frames 31 are started at the same time, so that the two pressing frames 31 can press on the edge of the tile 2 at the same time, and the pressing frame 31 and the pressing wheel 32 form a detection groove. The pressing wheel 32 contacts the edge of the tile 2 to ensure that when the tile 2 When there is a protrusion on the edge, the pressing wheel 32 can smoothly pass through the protrusion on the edge of the tile 2 without getting stuck. Since the pressing frame 31 equipped with the pressing wheel 32 is always in contact with the edge of the tile 2 under the action of the pressing unit 34, the opening of the detection groove formed by the pressing wheel 32 and the pressing frame 31 will be blocked by the edge of the tile 2, so that the light from the outside that can enter the detection groove is limited. In this way, the laser level meter 33 located in the detection groove can monitor the edge of the tile 2 in real time, ensuring the accuracy of the laser level meter 33. The detection principles of the two detection units 3 are the same, and the working principle of the other detection unit 3 will not be repeated here. At the same time, since the tile 2 is in a conveying state during measurement, it is guaranteed that the equipment can adapt to large-scale detection operations.

[0039] Reference Figure 8 and Fig.12 The pressing unit 34 includes a pushing tube 341, which is composed of a vertical tubular structure and a horizontal tubular structure. The pushing frame is slidably arranged at one end of the horizontal tubular structure. A pressing block 342 is slidably arranged in the vertical tubular structure along the extension direction of the vertical tubular structure. A pushing cavity is present between the pressing block 342 and the pressing frame 31, and hydraulic oil is present in the pushing cavity.

[0040] Before the tile 2 reaches the position of the detection unit 3, the first slide 343 drives the push tube 341 to move along the width direction of the base 1. Since there are two pressing frames 31 in one detection unit 3, two first slides 343 corresponding to the pressing frames 31 are also provided. The two first slides 343 synchronously drive the two pressing frames 31 to move synchronously. The two pressing frames 31 can move closer to or farther away from each other. In this way, the distance between the two pressing frames 31 can be adjusted, so that the distance between the two pressing frames 31 can be adjusted to a preset standard length in advance. The pressing block 342 located in the push tube 341 is in a static state, that is, the push tube 341 part on the upper side of the pressing block 342 has an air cavity 352, and the air cavity 352 and When connected to the outside world, the pressing block 342 can move smoothly. When the air cavity 352 is disconnected from the outside world, the pressing block 342 cannot move, that is, the pressing block 342 is in a locked state at this time, and the position of the pressing block 342 in the locked state is the reset position. At this time, the pressing block 342 can move up and down in the vertical direction after the air cavity 352 is unlocked, so that the pressing wheel 32 can always contact the edge of the tile 2, ensuring the detection accuracy of the laser level meter 33. If the pressing block 342 is dropped to the lowest position under the action of its own gravity, the pressing frame 31 is fully extended at this time. If there is a large dent or defect on the edge of the tile 2 at this time, the pressing wheel 32 will not be able to contact the edge of the tile 2, thereby causing detection errors.

[0041] Reference Figure 10-12 A reset unit 35 is also provided in the push tube 341. The reset unit 35 is located above the pressing block 342. The reset unit 35 includes a limit block 351 arranged in a vertical tubular structure. The limit block 351 is located above the pressing block 342. A pressure sensor is provided on the side of the limit block 351 facing the pressing block 342. An air cavity 352 is provided in the push tube 341 above the pressing block 342. A reversing valve 353 is provided on the side wall of the air cavity 352. The side of the reversing valve 353 away from the air cavity 352 is connected to the pump body. When the pressure sensor detects pressure, the pump body stops running.

[0042] The pressing wheel 32 on the pressing frame 31 needs to be reset after detecting the edge of each tile 2, so as to ensure that the next tile 2 can pass through the detection unit 3 smoothly. During the reset, the pump body is started first. At this time, the pump body is connected with the air cavity 352 through the reversing valve 353. The pump body extracts the air in the air cavity 352 through the reversing valve 353, so that the pressing block 342 rises in the pushing tube 341. At this time, the pressing frame 31 can be retracted into the pushing tube 341. When the pressing block 342 contacts the bottom of the limit block 351, the pressure sensor detects the pressure, and then the pump body stops running. When a new tile 2 passes through the detection unit 3 and is monitored by the camera, the reversing valve 353 is reversed. The reversing valve 353 after reversing connects the air cavity 352 with the outside world, and the pressing block 342 can generate a driving force on the pressing part under the action of its own gravity.

[0043] Reference Fig.11 : The limit block 351 is slidably arranged in the vertical tubular structure of the push tube 341 in the vertical direction. A driving unit 354 for driving the limit block 351 to move is arranged on the upper part of the limit block 351. The limit block 351 has a lowest position in its vertical moving stroke. When the limit block 351 is at the lowest position, it can position the pressing block 342 that needs to be reset. After the positioning is completed, the limit block 351 rises in the vertical direction.

[0044] After the pressing block 342 completes the resetting, the first slide 343 calibrates and resets the reset pressing frame 31. When the next tile 2 enters the position of the detection unit 3, if the limit block 351 cannot rise, and a bulge appears at the edge of the tile 2, a jam will occur. In order to avoid the above situation, the limit block 351 needs to be withdrawn in time after positioning the pressing block 342, so that the pressing wheel 32 can pass over normally when encountering a bulge on the edge of the tile 2.

[0045] Reference Fig.11 and Fig.13 The driving unit 354 includes a follower ring 3541 and a fixed ring 3542 which are arranged from top to bottom in the vertical direction. The fixed ring 3542 is fixedly arranged on the inner wall of the pushing tube 341. The follower ring 3541 moves in the pushing ring along the vertical direction, and the follower ring 3541 and the limit block 351 are lifted and lowered synchronously. The threaded rod passes through the fixed ring 3542 in the vertical direction and is threadedly matched with the fixed ring 3542. The two ends of the threaded rod are respectively connected to the follower ring 3541 and the limit block 351 and rotate together.

[0046] The driving unit 354 also includes a first gear 3544, a second gear 3545 and a first rotation driver 3546. The first gear 3544 is fixedly arranged at the upper end of the first threaded rod 3543, and the second gear 3545 is rotatably arranged on one side of the first gear 3544. The first gear 3544 and the second gear 3545 are meshed with each other. The first rotation driver 3546 is arranged at the end of the second gear 3545 and drives the second gear 3545 to rotate. The first rotation driver 3546 is preferably a servo motor. The follower ring 3541 is connected to the inner wall key of the pushing tube 341 and slides together. When the first gear 3544 drives the first threaded rod 3543 to rotate, the first threaded rod 3543 drives the locking frame and the limit block 351 to rise synchronously.

[0047] Reference Fig.13 A rangefinder 355 is vertically arranged on the upper part of the pressing block 342 . The rangefinder 355 is fixedly connected to the pushing tube 341 . The output end of the rangefinder 355 vertically points to the upper part of the pressing block 342 .

[0048] Since some tiles 2 may have large-area defects on their sides, the pressing wheel 32 on the pressing frame 31 is always in contact with the edge of the tile 2. Therefore, when the edge of the tile 2 has large-area defects, the laser level meter 33 may make a misjudgment during measurement, that is, the side of the tile 2 has a large-area defect, but the defective side of the tile 2 is relatively flat, that is, the size of the tile 2 itself has a deviation. In this way, the moving distance of the pressing wheel 32 can be detected by the rangefinder 355. Since the pressing wheels 32 on the two pressing frames 31 can press the edge of the tile 2 at the same time, when the edge of the tile 2 has a large-area defect, the two pressing wheels 32 are still in contact with the edge of the tile 2. In this way, the actual distance between the two pressing wheels 32 is less than the standard distance of the tile 2. In this way, the moving distance of the pressing block 342 monitored by the rangefinder 355 is the moving distance of the pressing wheel 32 in the horizontal direction. In this way, a comprehensive judgment is made on the overall shape of the tile 2 with the laser level meter 33, thereby reducing the false detection rate.

[0049] Reference Figure 2 , Figure 3 and Figure 7 Two detection units 3 are arranged on the base 1 along the length direction of the base 1, and the tile 2 moving on the base 1 passes through the two detection units 3 in turn for detection. A rotating unit 4 is arranged between the two detection units 3, and the rotating unit 4 is used to rotate the tile 2 90 degrees. The rotating unit 4 includes a supporting plate 41 arranged above the tile 2, and a suction cup 42 is arranged below the tile 2. The supporting plate 41 and the suction cup 42 move synchronously along the length direction of the base 1, and a plurality of magnetic sheets 421 are evenly arranged around the axis of the suction cup 42 at the bottom of the suction cup 42, and a magnetic rotator 43 is arranged at the lower part of the suction cup 42. The magnetic rotator 43 drives the suction cup 42 to rotate 90 degrees by attracting the magnetic sheets 421.

[0050] A first linear driver 411 is vertically arranged on the upper part of the support plate 41, and the output end of the first linear driver 411 is fixedly connected to the upper part of the support plate 41. The first linear driver 411 presses the upper part of the tile 2 through the support plate 41, and the suction cup 42 also rises in the vertical direction synchronously. When the suction cup 42 is squeezed on the bottom of the tile 2, the suction cup 42 rotates 90 degrees, and the pressing plate rises at the same time.

[0051] The magnetic rotator 43 has a plurality of electromagnets distributed around the axis of the suction cup 42. When the magnetic rotator 43 needs to drive the suction cup 42 to rotate, the electromagnetic sheets 431 are energized in turn to attract the magnetic sheets 421, so that the suction cup 42 can rotate.

[0052] An extension tube 44 is vertically arranged at the bottom of the suction cup 42, and a threaded groove is arranged on the outside of the extension tube 44. A gear ring 45 is sleeved on the extension tube 44 and threadedly matched with the extension tube 44. The rotating unit 4 also includes a bracket 491. The bracket 491 provides support for all components of the rotating unit 4, and the bracket 491 can move along the length direction of the base 1. The extension tube 44 runs through the bottom of the bracket 491. The extension tube 44 is key-connected with the bracket 491 and slides along the vertical direction. The third gear 46 is rotatably arranged on one side of the gear ring 45, and the second rotation driver 47 is fixedly arranged at the end of the third gear 46. The second rotation driver 47 is preferably a servo motor. A switch valve 441 is arranged at the bottom of the extension tube 44. During the process of the suction cup 42 adsorbing the tile 2, the switch valve 441 is in a closed state. When the suction cup 42 needs to be detached from the tile 2, the switch valve 441 is opened, and then the second rotation driver 47 rotates in the opposite direction, and the suction cup 42 can be smoothly detached from the tile 2.

[0053] Reference Figure 5 and Figure 6 : Two correction units 48 are respectively arranged on both sides of the base 1, and the correction unit 48 is located between the two detection units 3. The correction unit 48 includes a correction plate 481 that moves along the width direction of the base 1, and a second linear drive 482 for driving the correction plate 481 to move is horizontally arranged at one end of the correction plate 481. The correction unit 48 corrects the tile 2 after the rotation is completed.

[0054] After the tile 2 rotates 90 degrees, the two correction plates 481 in the two correction units 48 extend out at the same time and contact the edge of the tile 2, ensuring that the tile 2 is in the center position of the conveying unit 11, thereby ensuring that the tile 2 can smoothly enter the second detection unit 3.

[0055] Reference Figure 1 , Figure 4 and Figure 6: The rotating unit 4 also includes a synchronization unit 49 that drives the support plate 41 and the suction cup 42 to move synchronously along the length direction of the base 1. The driving speed of the synchronization unit 49 is the same as the conveying speed of the conveying unit 11. The synchronization unit 49 includes a bracket 491 that moves along the length direction of the base 1. A second threaded rod 492 penetrates the bracket 491 along the length direction of the base 1. The second threaded rod 492 is threadedly matched with the bracket 491. When the second threaded rod 492 rotates, the bracket 491 moves along the length direction of the base 1.

[0056] The synchronization unit 49 also includes a third rotation driver 493 and a guide rod. The third rotation driver 493 is arranged at the end of the second threaded rod 492. A guide rod is arranged in parallel on one side of the second threaded rod 492. The guide rod passes through the bracket 491 and slides with the bracket 491 along the length direction of the base 1. The third rotation driver 493 is preferably a servo motor. Since the moving speed of the bracket 491 in the synchronization unit 49 is the same as the conveying speed of the conveying unit 11, when the suction cup 42 adsorbs the tile 2, the suction cup 42 and the tile 2 are in a relatively static state. After the suction cup 42 completes a 90-degree rotation of the tile 2, the bracket 491 will quickly drive the suction cup 42 to reset and wait for the next tile 2 to reach the synchronization unit 49, repeating the cycle.

[0057] Reference Figure 1 and Figure 2 A conveying unit 11 is arranged on the base 1, and the conveying unit 11 includes a conveying belt 111 rotatably arranged on the base 1, and the upper part of the conveying belt 111 is used to receive the tiles 2, and a plurality of partition blocks 112 are evenly distributed on the outer edge surface of the conveying belt 111, and the extension direction of the partition blocks 112 is parallel to the width direction of the conveying belt 111.

[0058] The conveying unit 11 also includes a conveying wheel and a fourth rotary driver. There are two conveying wheels, which are arranged along the length direction of the base 1. The conveyor belt 111 is sleeved on the two conveying wheels, and the conveying wheels and the conveyor belt 111 are matched in transmission. The fourth rotary driver is arranged at the end of the conveying wheel. The fourth rotary driver is used to drive the conveying wheel to rotate. The dividing block 112 arranged on the conveyor belt 111 can provide supporting force for the side of the tile 2 away from the detection unit 3 when the conveyor belt 111 drives the tile 2 to move along the length direction of the base 1. In this way, when there is a protrusion at the edge of the tile 2 facing the detection unit 3, the tile 2 will not be pressed by the pressing wheel 32, so that the tile 2 slides relatively on the conveyor belt 111 and stagnates, ensuring that the tile 2 can be smoothly detected.

[0059] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A screening device for detecting the flatness of the edge of a tile, comprising a horizontally arranged base (1), a plurality of tiles (2) being supported on the base (1) and the tiles (2) being transported along the length direction of the base (1); It is characterized in that A detection unit (3) is arranged on the base (1), and the detection unit (3) is used to detect the edge flatness of the tile (2). The detection unit (3) comprises two pressing frames (31) that move in a horizontal direction. The two pressing frames (31) move synchronously and in opposite directions during movement. Each pressing frame (31) is provided with two pressing wheels (32). The two pressing wheels (32) are in rolling cooperation with the edge of the tile (2). The two pressing wheels (32) are arranged along the conveying direction of the tile (2), and the axes of the pressing wheels (32) are perpendicular to the horizontal plane. The two pressing wheels (32) are arranged along the conveying direction of the tile (2). 2) and the pressing frame (31) form a detection groove, the opening side of the detection groove faces the edge of the tile (2), a laser level meter (33) is horizontally arranged in the detection groove, the monitoring end of the laser level meter (33) faces the edge of the tile (2) horizontally, and a pressing unit (34) capable of driving the pressing frame (31) to move in a horizontal direction is arranged on one side of the pressing frame (31), when the tile (2) passes by one side of the pressing wheel (32), the pressing unit (34) pushes the pressing frame (31), so that the pressing wheel (32) on the pressing frame (31) always rolls with the edge of the tile (2).

2. A screening device for detecting the flatness of tile edges according to claim 1, characterized in that: The pressing unit (34) comprises a pushing tube (341), the pushing tube (341) is composed of a vertical tubular structure and a horizontal tubular structure, a pushing frame is slidably arranged at one end of the horizontal tubular structure, a pressing block (342) is slidably arranged in the vertical tubular structure along the extension direction of the vertical tubular structure, a pushing cavity is present between the pressing block (342) and the pressing frame (31), and hydraulic oil is present in the pushing cavity.

3. A screening device for detecting the flatness of tile edges according to claim 2, characterized in that: A reset unit (35) is also arranged in the push tube (341). The reset unit (35) is located above the pressing block (342). The reset unit (35) comprises a limit block (351) arranged in a vertical tubular structure. The limit block (351) is located above the pressing block (342). A pressure sensor is arranged on the side of the limit block (351) facing the pressing block (342). An air cavity (352) is arranged in the push tube (341) above the pressing block (342). A reversing valve (353) is arranged on the side wall of the air cavity (352). The side of the reversing valve (353) away from the air cavity (352) is connected to a pump body. When the pressure sensor detects pressure, the pump body stops running.

4. A screening device for detecting the flatness of tile edges according to claim 3, characterized in that: The limit block (351) is slidably arranged in the vertical tubular structure of the push tube (341) in the vertical direction. A driving unit (354) for driving the limit block (351) to move is arranged on the upper part of the limit block (351). The limit block (351) has a lowest position in its vertical moving stroke. When the limit block (351) is located at the lowest position, the pressing block (342) that needs to be reset can be positioned. After the positioning is completed, the limit block (351) rises in the vertical direction.

5. A screening device for detecting the flatness of tile edges according to claim 4, characterized in that: The driving unit (354) comprises a follower ring (3541) and a fixed ring (3542) which are arranged from top to bottom in the vertical direction. The fixed ring (3542) is fixedly arranged on the inner wall of the pushing tube (341). The follower ring (3541) moves inside the pushing ring in the vertical direction, and the follower ring (3541) and the limit block (351) are lifted and lowered synchronously. The threaded rod passes through the fixed ring (3542) in the vertical direction and is threadedly engaged with the fixed ring (3542). The two ends of the threaded rod are respectively connected to the follower ring (3541) and the limit block (351) and are rotationally engaged.

6. The screening device for detecting the flatness of the edge of a tile according to claim 3, characterized in that: A distance meter (355) is vertically arranged on the upper part of the pressing block (342), the distance meter (355) is fixedly connected to the pushing tube (341), and the output end of the distance meter (355) vertically points to the upper part of the pressing block (342).

7. A screening device for detecting the flatness of tile edges according to claim 1, characterized in that: Two detection units (3) are arranged on the base (1) along the length direction of the base (1); the tile (2) moving on the base (1) passes through the two detection units (3) in sequence for detection; a rotation unit (4) is arranged between the two detection units (3); the rotation unit (4) is used to rotate the tile (2) by 90 degrees; the rotation unit (4) comprises a support plate (41) arranged above the tile (2); a suction cup (42) is arranged below the tile (2); the support plate (41) and the suction cup (42) move synchronously along the length direction of the base (1); a plurality of magnetic sheets (421) are evenly arranged at the bottom of the suction cup (42) around the axis of the suction cup (42); a magnetic rotator (43) is arranged at the bottom of the suction cup (42); the magnetic rotator (43) drives the suction cup (42) to rotate by 90 degrees by attracting the magnetic sheets (421).

8. A screening device for detecting the flatness of tile edges according to claim 7, characterized in that: Two correction units (48) are respectively arranged on both sides of the base (1), and the correction unit (48) is located between the two detection units (3). The correction unit (48) includes a correction plate (481) that moves along the width direction of the base (1), and a second linear drive (482) for driving the correction plate (481) to move is horizontally arranged at one end of the correction plate (481). The correction unit (48) corrects the tile (2) after the rotation is completed.

9. A screening device for detecting the flatness of tile edges according to claim 7, characterized in that: The rotating unit (4) further comprises a synchronizing unit (49) for driving the supporting plate (41) and the suction cup (42) to synchronously move along the length direction of the base (1); the driving speed of the synchronizing unit (49) is the same as the conveying speed of the conveying unit (11); the synchronizing unit (49) comprises a bracket (491) for moving along the length direction of the base (1); a second threaded rod (492) penetrates the bracket (491) along the length direction of the base (1); the second threaded rod (492) is threadedly matched with the bracket (491); when the second threaded rod (492) rotates, the bracket (491) moves along the length direction of the base (1).

10. The screening device for detecting the flatness of the edge of a tile according to claim 1, characterized in that: A conveying unit (11) is arranged on the base (1), and the conveying unit (11) comprises a conveying belt (111) rotatably arranged on the base (1), the upper part of the conveying belt (111) is used to receive the tiles (2), and a plurality of partition blocks (112) are evenly distributed on the outer edge of the conveying belt (111), and the extending direction of the partition blocks (112) is parallel to the width direction of the conveying belt (111).

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