A gypsum board conveyor with deviation correction function

Abstract

The present invention discloses a gypsum board conveyor with a deflection correction function, comprising a conveyor module and an angle measuring instrument. The conveyor module comprises two conveyor modules arranged side by side, each having an actuator at the same height. The two edges of a board are placed on the actuators of the two conveyor modules, respectively. The two conveyor modules are capable of conveying the board at the same speed or at different speeds. The gypsum board conveyor uses the angle measuring instrument to measure the angle between the long edge of the board and the conveying direction of the conveyor module. The two conveyor modules then convey the board at different speeds, causing the board to deflect by a corresponding angle during conveyance. After the board is straightened, the two conveyor modules convey the board at the same speed, ensuring that the board follows the conveying direction of the conveyor module.

Description

Technical Field

[0001] The present invention relates to the field of conveyors, and in particular to a gypsum board conveyor with a deviation-correcting function. Background Art

[0002] After the gypsum boards are stacked, they need to be transported to a baler for packaging. During the transportation process, or when the gypsum boards are moved to the conveyor line, the long side of the gypsum boards often has an angle with the transportation direction. This causes the baler to pack the gypsum boards, and the strapping tape is tilted and tied to the stacked gypsum boards. Such packaging is loose, and the length of the strapping tape is actually greater than the circumference of the stacked gypsum boards, and the strapping tape can easily loosen. Summary of the Invention

[0003] The object of the present invention is to provide a gypsum board conveyor with a deviation correction function to solve the technical problem that the length direction of the gypsum board is not parallel to the conveying direction of the gypsum board during the conveying process.

[0004] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0005] A gypsum board conveyor with a deviation correction function comprises: two transmission modules arranged side by side, the two transmission modules having actuators of the same height, the two sides of the board being placed on the actuators of the two transmission modules respectively, and the two transmission modules being capable of conveying at the same speed or at a differential speed; an angle measuring instrument for measuring the angle between the long side of the board and the conveying direction of the transmission module; when the two transmission modules are conveyed at the same speed, the board moves along the conveying direction of the transmission module; when the two transmission modules are conveyed at a differential speed, the board moves along the conveying direction of the transmission module and is deflected by a corresponding angle.

[0006] Furthermore, the transmission module includes a first conveyor and a second conveyor connected end to end, the second conveyor is connected to the output end of the first conveyor, the second conveyor has the same conveying direction as the first conveyor, and the second conveyor is used to differentially convey the plate so that the plate produces angular displacement during the conveying process; a paper feeder is provided between the first conveyor and the second conveyor, and the paper feeder is used to output strip-shaped paper along the conveying direction of the second conveyor toward the top of the executive part of the second conveyor, and in the process of the plate moving from the first conveyor to the second conveyor, the paper is squeezed in the middle by the plate and the executive part of the second conveyor, and the paper is used to protect the bottom surface of the plate when the second conveyor is differentially conveyed.

[0007] Furthermore, the transmission module includes a third conveyor connected to the output end of the second conveyor, and the conveying direction of the third conveyor is the same as that of the second conveyor; a paper recycling machine is arranged between the second conveyor and the third conveyor, and the input end of the paper recycling machine is located below the bottom surface of the conveyed plate and faces the bottom surface of the plate. The paper recycling machine is used to recover the paper adhered to the bottom surface of the plate by vacuum suction and / or mechanical pulling.

[0008] Furthermore, the paper feeder includes: a paper storage box, which is provided with a paper outlet facing the second conveyor; a reel shaft, which is horizontally arranged and rotatably connected to the paper storage box, and the paper is inserted on the reel shaft in the form of a paper roll; a first rubber wheel, which is rotatably connected to the paper storage box and is arranged beside the paper outlet; a second rubber wheel, which is rotatably connected to the paper storage box and is arranged side by side beside the first rubber wheel, and the first rubber wheel and the second rubber wheel are used to clamp the paper; a motor, which is transmission-connected to the first rubber wheel and / or the second rubber wheel, and the motor is used to drive the first rubber wheel and the second rubber wheel to rotate in opposite directions to output the paper toward the second conveyor.

[0009] Furthermore, an annular air supply tube is installed on the outside of the paper storage box and is sleeved on the paper outlet. The annular air supply tube is connected to an air pump, and the air pump is used to output high-pressure gas to the annular air supply tube so that the annular air supply tube outputs high-speed airflow around the edge of the paper outlet along the ejection direction of the paper.

[0010] Furthermore, along the width direction of the paper, the cross section of the inner wall of the annular air supply cylinder presents a trapezoidal shape, and the upper base of the trapezoid faces above the execution part of the second conveyor.

[0011] Furthermore, along the length direction of the paper, the paper is covered with tear lines, and the first rubber wheel and / or the second rubber wheel are equipped with brakes for braking the rotation of the first rubber wheel and the second rubber wheel.

[0012] Furthermore, a through-beam photoelectric switch is provided inside the paper storage box and is located between the paper outlet and the unwinding shaft. The through-beam photoelectric switch is used to detect the paper between the paper outlet and the unwinding shaft.

[0013] Furthermore, a second device is provided inside the paper storage box and faces the axis of the unwinding shaft, and the second device is used to detect the distance between the outer surface of the paper roll and itself.

[0014] Furthermore, the angle measuring instrument includes a first ranging sensor, which has multiple first ranging sensors and is distributed on both sides of the two transmission modules along the conveying direction of the transmission module. The distance between each first ranging sensor and the adjacent transmission module is equal. The first ranging sensor is used to measure the distance between the side wall of the plate and itself, and then analyze and obtain the angle between the long side of the plate and the conveying direction; or - the angle measuring instrument includes a machine vision sensor, which is used to capture the image of the top surface of the plate from top to bottom, so as to analyze and obtain the angle between the long side of the plate and the conveying direction.

[0015] Compared with the prior art, this application has the following beneficial effects:

[0016] A gypsum board conveyor with a deviation correction function is provided. The angle between the long side of the board and the conveying direction of the conveying module is measured by an angle measuring instrument. The board is then conveyed at a differential speed by two conveying modules so that the board is deflected by a corresponding angle during the conveying process. After the board is straightened, the two conveying modules convey the board at the same speed so that the board is along the conveying direction of the conveying module. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0018] Figure 1 A schematic diagram of a machine structure from a top view of Example 1 of the present invention;

[0019] Figure 2 This is a mechanical diagram from a side view of Example 3 of the present invention;

[0020] Figure 3 A perspective view of embodiment 3 of the present invention;

[0021] Figure 4 This is a perspective view of a paper feeder according to Example 3 of the present invention, in which the housing and the annular air supply cylinder of the paper feeder are in a perspective state;

[0022] Figure 5 A top view of a paper feeder according to an embodiment of the present invention;

[0023] Figure 6 for Figure 5 A cross-sectional view in the AA direction and a partial enlarged view thereof;

[0024] Figure 7The mechanical diagram of the side view of embodiment 4 of the present invention is shown in FIG. Figure 1 ,In the figure, the gypsum board is moved intact onto the second conveyor;

[0025] Figure 8 The mechanical diagram of the side view of embodiment 4 of the present invention is shown in FIG. Figure 1 , in the figure, the gypsum board moves from the second conveyor to the third conveyor;

[0026] The numbers in the figure represent the following:

[0027] 1-Transmission module; 11-First conveyor; 12-Second conveyor; 13-Third conveyor; 2-Plate; 21-First distance measuring sensor; 22-Machine vision sensor; 3-Paper feeder; 31-Paper storage box; 311-Paper outlet; 32-Unwinding shaft; 33-First rubber wheel; 34-Second rubber wheel; 35-Annular air supply tube; 351-Air inlet; 352-Air outlet; 36-Through-beam photoelectric switch; 37-Second distance measuring sensor; 4-Paper; 41-Paper roll; 42-Tear line; 5-Paper recycling machine. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] This specific implementation provides Example 1, please refer to Figure 1 .

[0030] A gypsum board conveying line with a deviation correction function, comprising:

[0031] There are two transmission modules 1 arranged side by side, and the two transmission modules 1 have execution parts of the same height, and both sides of the plate 2 are placed on the execution parts of the two transmission modules 1 respectively;

[0032] An angle measuring instrument, used to measure the angle between the long side of the plate 2 and the conveying direction of the transmission module 1;

[0033] When the two transmission modules 1 work at the same speed, the plate 2 moves along the conveying direction of the transmission module 1;

[0034] When the two transmission modules 1 operate at a differential speed, the plate 2 moves along the conveying direction of the transmission module 1 and deflects a corresponding angle.

[0035] The transmission module 1 adopts a chain plate conveyor, and the execution part of the transmission module 1 refers to the chain plate itself.

[0036] After the angle measuring instrument finds that the plate 2 deviates from the conveying direction during the conveying process, it sends the corresponding angle to the controller. The controller sends a working instruction to the two transmission modules 1 according to the angle deviation, so that the two transmission modules 1 work at differential speeds. The plate 2 deflects in the direction during the conveying process until the long side of the plate 2 is parallel to the conveying direction.

[0037] Optional:

[0038] The angle measuring instrument includes a first distance measuring sensor 21. There are multiple first distance measuring sensors 21 and they are distributed on both sides of the two transmission modules 1 along the conveying direction of the transmission module 1. The distance between each first distance measuring sensor 21 and its adjacent transmission module 1 is equal. The first distance measuring sensor 21 is used to measure the distance between the side wall of the plate 2 and itself, and then analyze and obtain the angle between the long side of the plate 2 and the conveying direction.

[0039] The first distance measuring sensor 21 is a laser rangefinder.

[0040] Optionally, embodiment 2:

[0041] The angle measuring instrument includes a machine vision sensor 22, which is used to collect images of the top surface of the plate 2 from top to bottom to analyze and obtain the angle between the long side of the plate 2 and the conveying direction.

[0042] The machine vision sensor 22 uses a CCD camera.

[0043] Embodiment 1 or 2 has the following defects:

[0044] Since the stacked gypsum boards are heavy and the friction between the chain plates and the gypsum boards is large, when the two transmission modules 1 operate at a differential speed, the gypsum boards deflect at a certain angle during transportation, resulting in relative movement between the bottom surface of the gypsum boards and the chain plates. The bottom surface of the bottom gypsum board is easily scratched by the chain plates, affecting the surface quality of the gypsum boards.

[0045] Further:

[0046] In order to solve the above technical problems, based on Example 1 or 2, this specific implementation method also provides Example 3, please refer to Figure 2 、 Figure 3 .

[0047] The transport module 1 includes a first conveyor 11 and a second conveyor 12 connected end to end. The second conveyor 12 is connected to the output end of the first conveyor 11. The second conveyor 12 and the first conveyor 11 have the same conveying direction. The second conveyor 12 is used for differential operation to cause angular displacement of the plate 2 during the conveying process.

[0048] A paper feeder 3 is provided between the first conveyor 11 and the second conveyor 12. The paper feeder 3 is used to output a strip of paper 4 along the conveying direction of the second conveyor 12 toward the top of the execution part of the second conveyor 12, and ensure that the paper 4 is squeezed in the middle by the plate 2 and the execution part of the second conveyor 12 during the process of the plate 2 moving from the first conveyor 11 to the second conveyor 12.

[0049] When the gypsum board produces an angular displacement relative to the conveying direction, relative sliding occurs between the bottom surface of the gypsum board and the chain plate, causing the bottom surface of the gypsum board to be scratched and worn by the chain plate.

[0050] To this end, before the second conveyor 12 operates at a differential speed, a layer of paper 4 is laid on the chain plate of the second conveyor 12 to separate the gypsum board and the chain plate. When the gypsum board slides relative to the chain plate, the paper 4 will be wrinkled or damaged, while the bottom surface of the gypsum board is protected by the paper 4, thereby protecting the surface quality of the gypsum board.

[0051] Optional, such as Figure 4 、 5 , 6 as shown:

[0052] Paper feeder 3 includes:

[0053] The paper storage box 31 is provided with a paper outlet 311 in the direction of the second conveyor 12;

[0054] The unwinding shaft 32 is horizontally arranged and rotatably connected to the paper storage box 31. The paper 4 is inserted into the unwinding shaft 32 in the form of a paper roll 41;

[0055] A first rubber wheel 33 is rotatably connected to the paper storage box 31 and is disposed beside the paper outlet 311;

[0056] The second rubber wheel 34 is rotatably connected to the paper storage box 31 and is arranged side by side beside the first rubber wheel 33. The first rubber wheel 33 and the second rubber wheel 34 are used to clamp the paper 4;

[0057] The motor (not shown) is connected to the first rubber wheel 33 and / or the second rubber wheel 34 , and is used to drive the first rubber wheel 33 and the second rubber wheel 34 to rotate in opposite directions so as to output the paper 4 toward the second conveyor 12 .

[0058] There may be two motors, which are respectively connected to the first rubber wheel 33 and the second rubber wheel 34 in a transmission manner.

[0059] The motor may also have one and is only transmission-connected to the first rubber wheel 33 or the second rubber wheel 34 . In this case, the first rubber wheel 33 and the second rubber wheel 34 are connected via gear transmission.

[0060] When the front end of the gypsum board moves between the first conveyor 11 and the second conveyor 12, the motor starts, the first rubber wheel 33 and the second rubber wheel 34 rotate in opposite directions, the paper roll 41 releases the paper 4, and the paper 4 is ejected outward through the paper outlet 311. The front end of the paper 4 overlaps the actuator of the second conveyor 12, and then the gypsum board presses on the front end of the paper 4 and drags the paper 4 forward along the conveying direction of the second conveyor 12.

[0061] Further:

[0062] When the texture of the paper 4 is relatively soft and the rotation speed of the first rubber wheel 33 and the second rubber wheel 34 is relatively slow, the paper 4 will sag before reaching the execution part of the second conveyor 12, making it difficult for the paper 4 to be sandwiched between the gypsum board and the second conveyor 12. In order to solve the above technical problems.

[0063] An annular air supply cylinder 35 is installed on the outside of the paper storage box 31 and is sleeved on the paper outlet 311. The annular air supply cylinder 35 is connected to an air pump, which is used to output high-pressure gas to the annular air supply cylinder 35 so that the annular air supply cylinder 35 outputs high-speed airflow around the edge of the paper outlet 311 along the ejection direction of the paper 4.

[0064] An air inlet 351 is provided beside the annular air supply tube 35 , and the annular air supply tube 35 is connected to the output end of the air pump.

[0065] An air outlet 352 is provided on one end surface of the annular air supply cylinder 35 facing the second conveyor 12 . Since the annular air supply cylinder 35 is in the shape of a rectangular cylinder, the air outlet 352 is in the shape of a rectangular ring.

[0066] After the paper 4 is ejected through the paper outlet 311, it is surrounded by a high-speed airflow ejected toward the top of the execution part of the second conveyor 12, causing the paper 4 to stand upright in the air and tilt toward the top of the second conveyor 12 until the bottom surface of the gypsum board squeezes the paper 4 and presses it against the second conveyor 12.

[0067] Optional:

[0068] Along the width direction of the paper 4 , the cross section of the inner wall of the annular air supply cylinder 35 presents a trapezoidal shape, and the upper base of the trapezoid faces upward of the execution portion of the second conveyor 12 .

[0069] The shape of the inner wall of the annular air supply cylinder 35 allows the paper 4 to easily enter from its lower end, and the airflow output from its upper end (i.e., the air outlet 352) is flatter, with a better guiding effect.

[0070] Further:

[0071] After the end of the gypsum board is completely moved onto the second conveyor 12 , there is no need to output the paper 4 onto the second conveyor 12 , in order to achieve the purpose of stopping the conveyance of the paper 4 .

[0072] The paper 4 is covered with tear lines 42 along its length. The first rubber wheel 33 and / or the second rubber wheel 34 are equipped with brakes for braking the rotation of the first rubber wheel 33 and the second rubber wheel 34 .

[0073] At this time, the motor stops working and the brake is activated to stop the first rubber wheel 33 and the second rubber wheel 34 from rotating. Under the bite of the first rubber wheel 33 and the second rubber wheel 34, the paper 4 between the paper outlet 311 and the second conveyor 12 is broken through the tear line 42.

[0074] Optional:

[0075] A through-beam photoelectric switch 36 is provided inside the paper storage box 31 and is located between the paper outlet 311 and the unwinding shaft 32 . The through-beam photoelectric switch 36 is used to detect the paper 4 between the paper outlet 311 and the unwinding shaft 32 .

[0076] When the through-beam photoelectric switch 36 cannot detect the paper 4, it indicates that the paper 4 is broken inside the paper storage box 31. The controller promptly receives the signal from the through-beam photoelectric switch 36 and issues an alarm to the staff.

[0077] Optional:

[0078] A second distance measuring sensor 37 facing the axis of the unwinding shaft 32 is provided inside the paper storage box 31 . The second distance measuring sensor 37 is used to detect the distance between the outer surface of the paper roll 41 and itself.

[0079] The second distance measuring sensor 37 is used to measure the distance between the paper roll 41 and itself so as to calculate the remaining thickness of the paper roll 41 through the controller. When the paper roll 41 is about to run out, the controller issues a warning to the staff.

[0080] Further:

[0081] Since the wrinkles or damaged paper 4 remaining on the bottom surface of the gypsum board will affect the subsequent packaging of the gypsum board, the paper 4 on the bottom needs to be removed before the gypsum board reaches the packaging machine.

[0082] In order to solve the above technical problems, based on Example 3, this specific implementation method also provides Example 4, please refer to Figure 7 、 Figure 8 .

[0083] The transmission module 1 includes a third conveyor 13 connected to the output end of the second conveyor 12. The third conveyor 13 has the same conveying direction as the second conveyor 12.

[0084] A paper recovery machine 5 is provided between the second conveyor 12 and the third conveyor 13. The input end of the paper recovery machine 5 is located below the bottom surface of the conveyed plate 2 and faces the bottom surface of the plate 2. The paper recovery machine 5 is used to recover paper 4 adhered to the bottom surface of the plate by vacuum suction and / or mechanical pulling.

[0085] The paper recycling machine 5 may be a vacuum cleaner, or a vacuum cleaner with a roller brush, and the suction end of the vacuum cleaner may be arranged between the second conveyor 12 and the third conveyor 13 .

[0086] The gypsum board is transported to the gypsum board packaging machine via the third conveyor 13. When the gypsum board arrives at the packaging machine, the gypsum board has been straightened and there is no residual paper 4 on the bottom surface.

[0087] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the spirit and scope of protection of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the embodiments of the present invention.

Claims

1. A gypsum board conveyor with a deviation correction function, characterized in that: include: The transmission modules (1) have two and are arranged side by side, the two transmission modules (1) have execution parts of the same height, the two sides of the plate (2) are respectively placed on the execution parts of the two transmission modules (1), and the two transmission modules (1) can be transported at the same speed or at a differential speed; An angle measuring instrument for measuring the angle between the long side of the plate (2) and the conveying direction of the transmission module (1); When the two transmission modules (1) are conveying at the same speed, the plate (2) moves along the conveying direction of the transmission modules (1); When the two transmission modules (1) are conveyed at a differential speed, the plate (2) moves along the conveying direction of the transmission module (1) and deflects by a corresponding angle; The transmission module (1) comprises a first conveyor (11) and a second conveyor (12) connected end to end, the second conveyor (12) being connected to the output end of the first conveyor (11), the second conveyor (12) having the same conveying direction as the first conveyor (11), and the second conveyor (12) being used for differentially conveying the plate (2) so that the plate (2) generates angular displacement during the conveying process; A paper feeder (3) is provided between the first conveyor (11) and the second conveyor (12), and the paper feeder (3) is used to output a strip of paper (4) toward the top of the execution part of the second conveyor (12) along the conveying direction of the second conveyor (12), and in the process of the plate (2) moving from the first conveyor (11) to the second conveyor (12), the paper (4) is squeezed between the plate (2) and the execution part of the second conveyor (12), and the paper (4) is used to protect the bottom surface of the plate (2) when the second conveyor (12) is conveyed at a differential speed; The paper feeder (3) comprises: A paper storage box (31) is provided with a paper outlet (311) facing the second conveyor (12); an unwinding shaft (32) arranged horizontally and rotatably connected to the paper storage box (31), wherein the paper (4) is inserted on the unwinding shaft (32) in the form of a paper roll (41); a first rubber wheel (33) rotatably connected to the paper storage box (31) and arranged beside the paper outlet (311); a second rubber wheel (34) rotatably connected to the paper storage box (31) and arranged side by side beside the first rubber wheel (33), the first rubber wheel (33) and the second rubber wheel (34) being used to clamp the paper (4); a motor, drivingly connected to the first rubber wheel (33) and / or the second rubber wheel (34), the motor being used to drive the first rubber wheel (33) and the second rubber wheel (34) to rotate in opposite directions so as to output the paper (4) toward the second conveyor (12); An annular air supply tube (35) sleeved on the paper outlet (311) is installed on the outer side of the paper storage box (31), and the annular air supply tube (35) is connected to an air pump, and the air pump is used to output high-pressure gas to the annular air supply tube (35) so that the annular air supply tube (35) outputs high-speed airflow around the edge of the paper outlet (311) along the ejection direction of the paper (4); After the paper (4) is ejected through the paper outlet (311), the paper (4) is surrounded by a high-speed airflow ejected toward the upper part of the execution part of the second conveyor (12), so that the paper (4) stands upright in the air and tilts toward the upper part of the second conveyor (12) until the bottom surface of the gypsum board presses against the paper (4) and presses it onto the second conveyor (12).

2. The gypsum board conveyor with a deviation correction function according to claim 1, characterized in that: The transmission module (1) comprises a third conveyor (13) connected to the output end of the second conveyor (12), and the conveying direction of the third conveyor (13) is the same as that of the second conveyor (12); A paper recycling machine (5) is provided between the second conveyor (12) and the third conveyor (13). The input end of the paper recycling machine (5) is located below the bottom surface of the conveyed plate (2) and faces the bottom surface of the plate (2). The paper recycling machine (5) is used to recycle the paper (4) adhered to the bottom surface of the plate by vacuum suction and / or mechanical pulling.

3. The gypsum board conveyor with a deviation correction function according to claim 1, characterized in that: Along the width direction of the paper (4), the cross section of the inner wall of the annular air supply cylinder (35) presents a trapezoidal shape, and the upper base of the trapezoid faces above the execution part of the second conveyor (12).

4. The gypsum board conveyor with a deviation correction function according to claim 1, characterized in that: The paper (4) is covered with tear lines (42) along the length direction of the paper (4), and a brake is installed on the first rubber wheel (33) and / or the second rubber wheel (34), and the brake is used to brake the rotation of the first rubber wheel (33) and the second rubber wheel (34).

5. The gypsum board conveyor with a deviation correction function according to claim 1, characterized in that: A counter-beam photoelectric switch (36) is provided inside the paper storage box (31) and is located between the paper outlet (311) and the unwinding shaft (32). The counter-beam photoelectric switch (36) is used to detect the paper (4) between the paper outlet (311) and the unwinding shaft (32).

6. The gypsum board conveyor with a deviation correction function according to claim 1, characterized in that: A second distance measuring sensor (37) facing the axis of the unwinding shaft (32) is provided inside the paper storage box (31), and the second distance measuring sensor (37) is used to detect the distance between the outer surface of the paper roll (41) and itself.

7. A gypsum board conveyor with a deviation correction function according to any one of claims 1-2, characterized in that: The angle measuring instrument comprises a first distance measuring sensor (21), wherein the first distance measuring sensors (21) are provided in plurality and are distributed on both sides of the two transmission modules (1) along the conveying direction of the transmission modules (1), and the distance between each first distance measuring sensor (21) and its adjacent transmission module (1) is equal, and the first distance measuring sensor (21) is used to measure the distance between the side wall of the plate (2) and itself, and then analyze and obtain the angle between the long side of the plate (2) and the conveying direction; or-- The angle measuring instrument comprises a machine vision sensor (22), which is used to collect an image of the top surface of the plate (2) from top to bottom, so as to analyze and obtain the angle between the long side of the plate (2) and the conveying direction.

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