Stacked material detection device

Abstract

The utility model discloses a stacked material detection device, the stacked material detection device comprises a first detection assembly and a second detection assembly, the first detection assembly comprises a first fixed seat, a first swing arm and a first sensor, the first swing arm comprises a first fixed end and a first swing end, the first fixed end is rotatably assembled on the first fixed seat, and the first swing end is rotatably assembled on the second fixed seat; the first swing end is provided with a first contact piece, the first contact piece is used for being in lap joint with the first edge of the material disc, and the first sensor is arranged on the first swing end; the second detection assembly comprises a second fixed seat, a second swing arm and a second sensor, the second swing arm comprises a second fixed end and a second swing end, the second swing end is connected with the first swing end through a connecting shaft so that the first swing arm and the second swing arm can swing synchronously, one of the second sensor and the first sensor is a transmitting end, and the other one is a receiving end; the transmitting end and the receiving end are oppositely arranged, and the contact piece is always in lap joint with the edge of the charging tray, so that the detection result of the sensor is more accurate.

Description

Technical Field

[0001] This application relates to the field of semiconductor technology, and particularly to a stacked material detection device. Background Art

[0002] During the process of transporting chips in a tray, it is necessary to detect whether there is a situation of stacked chips in the tray. In the existing stacked material detection, opposed photoelectric sensors are fixed on both sides of the tray. When there is a situation of stacked chips, the chips will block the light beam emitted by the sensors, and then the sensors will give a signal to the system, and the system will alarm. However, the position of the sensors is fixed. When the tray is slightly deformed and there is no stacked material, it is also possible for the system to alarm, resulting in false detection, making the detection not sensitive enough and affecting the production efficiency. Summary of the Utility Model

[0003] Aiming at the above deficiencies in the prior art, this application discloses a stacked material detection device, which can effectively and accurately detect whether there is a situation of stacked materials, the detection is more sensitive, and there will be no false detection, which helps to improve the accuracy and stability of material transmission in the production process, and improve the production efficiency and quality.

[0004] To achieve the above object, this application discloses a stacked material detection device for detecting the stacked material situation of materials on the tray of a transmission device. The transmission device includes a transmission base and a transmission component provided on the transmission base. The transmission component drives the tray to move. The stacked material detection device includes:

[0005] A first detection component, which includes a first fixed seat, a first swing arm and a first sensor. The first fixed seat is used to be fixed on the transmission base and is located on one side of the tray in the transmission direction. The first swing arm includes a first fixed end and a first swing end. The first fixed end is rotationally assembled on the first fixed seat. A first contact member is provided on the first swing end. The first contact member is used to lap on the first edge of the tray. The first sensor is provided on the first swing end.

[0006] A second detection component, which includes a second fixed seat, a second swing arm and a second sensor. The second fixed seat is used to be fixed on the transmission base and is located on the other side of the tray in the transmission direction. The second swing arm includes a second fixed end and a second swing end. The second fixed end is rotationally assembled on the second fixed seat. A second contact member is provided on the second swing end. The second contact member is used to lap on the second edge of the tray. The second swing end is connected to the first swing end through a connecting shaft so that the first swing arm and the second swing arm swing synchronously. The second sensor is provided on the second swing end. One of the second sensor and the first sensor is a transmitting end, and the other is a receiving end, and the transmitting end and the receiving end are arranged oppositely.

[0007] In a possible implementation manner, the first contact member includes a first bearing, and the first bearing includes a first fixed inner ring and a first rotating outer ring. The first fixed inner ring is fixed to the first swing arm, and the first rotating outer ring is used for lapping on the first edge of the tray;

[0008] The second contact member includes a second bearing, and the second bearing includes a second fixed inner ring and a second rotating outer ring. The second fixed inner ring is fixed to the second swing arm, and the second rotating outer ring is used for lapping on the second edge of the tray.

[0009] In a possible implementation manner, the first contact member further includes a first fixed shaft passing through the first swing arm. The first fixed inner ring is fixed on the first fixed shaft, and the installation position of the first fixed shaft relative to the first swing arm is adjustable in the vertical direction;

[0010] The second contact member further includes a second fixed shaft passing through the second swing arm. The second fixed inner ring is fixed on the second fixed shaft, and the installation position of the second fixed shaft relative to the second swing arm is adjustable in the vertical direction.

[0011] In a possible implementation manner, the first swing arm is provided with a first long hole in the horizontal direction. The size of the first long hole in the vertical direction is greater than the diameter of the first fixed shaft. The first swing arm is respectively provided with a first vertical threaded hole and a second vertical threaded hole on the two opposite sides of the first long hole in the vertical direction. The first vertical threaded hole and the second vertical threaded hole are both communicated with the first long hole. A first locking set screw is arranged in the first vertical threaded hole, and a second locking set screw is arranged in the second vertical threaded hole. Both the first locking set screw and the second locking set screw are abutted against the first fixed shaft;

[0012] The second swing arm is provided with a second long hole in the horizontal direction. The size of the second long hole in the vertical direction is greater than the diameter of the second fixed shaft. The second swing arm is respectively provided with a third vertical threaded hole and a fourth vertical threaded hole on the two opposite sides of the second long hole in the vertical direction. The third vertical threaded hole and the fourth vertical threaded hole are both communicated with the second long hole. A third locking set screw is arranged in the third vertical threaded hole, and a fourth locking set screw is arranged in the fourth vertical threaded hole. Both the third locking set screw and the fourth locking set screw are abutted against the second fixed shaft.

[0013] In a possible implementation manner, the first swing end is supported by a first adjusting member and the transmission base, so that the distance between the first swing end and the transmission base is adjustable;

[0014] The second swing end is supported by a second adjusting member and the transmission base, so that the distance between the second swing end and the transmission base is adjustable.

[0015] In a possible implementation manner, a first threaded through hole is provided on the first swing arm in the vertical direction. The first adjusting member includes a first adjusting bolt, and the first adjusting bolt is engaged with the first threaded through hole. The lower end of the first adjusting bolt is used to support on the transmission base;

[0016] A second threaded through hole is provided on the second swing arm in the vertical direction. The second adjusting member includes a second adjusting bolt, and the second adjusting bolt is engaged with the second threaded through hole. The lower end of the second adjusting bolt is used to support on the transfer base.

[0017] In a possible implementation manner, the first fixed end is rotationally assembled on the first fixed seat through a third bearing, and the second fixed end is rotationally assembled on the second fixed seat through a fourth bearing.

[0018] In a possible implementation manner, the connecting shaft is detachably connected to the first swing arm and the second swing arm.

[0019] In a possible implementation manner, one of the transmitting end and the receiving end is provided at a position of the first swinging end close to the first bearing, and the other of the transmitting end and the receiving end is provided at a position of the second swinging end close to the second bearing.

[0020] In a possible implementation manner, the stacking detection device further includes a control system. The control system is electrically connected to the first sensor and the second sensor. The control system includes an alarm module. When the control system determines that the signal between the transmitting end and the receiving end is abnormal, the alarm module issues an alarm.

[0021] Compared with the prior art, the beneficial effects of the present application are as follows:

[0022] In the stack detection device provided in this application, the first fixed seat is used to be fixed on the transmission base, on one side in the material tray transmission direction, providing an installation foundation for the first swing arm. The first swing arm is rotationally assembled on the first fixed seat through its first fixed end, enabling the first swing end to swing flexibly. The first contact member on the first swing end overlaps with the first edge of the material tray. In this way, the swing amplitude of the first swing arm changes following the material tray. The second fixed seat is also fixed on the transmission base, on the other side in the material tray transmission direction. The second fixed end of the second swing arm is rotationally assembled on the second fixed seat. The second contact member on the second swing end overlaps with the second edge of the material tray. The first swing end and the second swing end are connected by a connecting shaft to achieve synchronous swinging of the first swing arm and the second swing arm. By arranging the first sensor on the first swing end and the second sensor on the second swing end, with the transmitting end and the receiving end of the sensor arranged opposite to each other, it is used to detect the stack situation of the material tray. In this way, whether the material tray is deformed or its position changes, since the contact member on the swing end of the swing arm always overlaps with the material tray, the sensor on the swing end also changes following the position of the material tray, enabling the sensor to effectively and accurately detect whether there is material stacking, making the detection more sensitive and without false detection, which helps to improve the accuracy and stability of material transmission in the production process and enhance production efficiency and quality. Brief Description of the Drawings

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 Structural schematic diagram of a stack detection device provided in an embodiment of the present utility model overlapping on a material tray;

[0025] Figure 2 Structural schematic diagram of a stack detection device provided in an embodiment of the present utility model;

[0026] Figure 3 Structural schematic diagram of the first detection component of a stack detection device provided in an embodiment of the present utility model;

[0027] Figure 4 Structural schematic diagram of a stack detection device provided in an embodiment of the present utility model showing the first long hole.

[0028] Description of the reference numerals:

[0029] 10 - First detection component; 11 - First fixed seat; 111 - Third bearing; 12 - First swing arm; 121 - First fixed end; 122 - First swing end; 1221 - First long hole; 1222 - First vertical threaded hole; 1223 - Second vertical threaded hole; 1224 - First adjusting member; 1225 - First clamping gap; 1226 - First fastening hole; 1227 - First locking member; 13 - First sensor; 14 - First contact member; 141 - First bearing; 1411 - First fixed inner ring; 1412 - First rotating outer ring; 142 - First fixed shaft; 20 - Second detection component; 21 - Second fixed seat; 211 - Fourth bearing; 22 - Second swing arm; 221 - Second fixed end; 222 - Second swing end; 24 - Second contact member; 30 - Connecting shaft; 50 - Tray. Detailed implementation manners

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0031] In the present application, the terms "installed", "set up", "provided with", "connected", and "linked" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0032] In addition, terms such as "first" and "second" are mainly used to distinguish different devices, components, or parts (the specific types and structures may be the same or different), and do not indicate or imply the relative importance and quantity of the indicated devices, components, or parts. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0033] During the transfer process of the chip in the tray, it is necessary to detect whether there is a chip stacking situation in the tray. In the existing stacking detection, opposed photoelectric sensors are fixed on both sides of the tray. When there is a stacking situation, the chip will block the light column emitted by the sensor, and then the sensor will give a signal to the system, and the system will alarm. However, the position of this sensor is fixed. When the tray is slightly deformed and there is no stacking, it is also possible for the system to alarm, resulting in false detection, making the detection less sensitive and affecting the production efficiency.

[0034] In view of this, some embodiments of the present application provide a stack detection device, which can effectively and accurately detect whether there is material stacking, is more sensitive in detection, will not have false detection, helps to improve the accuracy and stability of material transmission in the production process, and improves production efficiency and quality.

[0035] The present application will be described in detail through specific embodiments as follows:

[0036] The stack detection device of the embodiment of the present application is used to detect the stacking situation of materials on the tray 50 of the transmission device. The transmission device includes a transmission base and a transmission component arranged on the transmission base, and the transmission component drives the tray 50 to move. As Figures 1-4 shown, the stack detection device includes:

[0037] The first detection component 10, the first detection component 10 includes a first fixed seat 11, a first swing arm 12 and a first sensor 13. The first fixed seat 11 is used to be fixed on the transmission base and is located on one side of the transmission direction of the tray 50. The first swing arm 12 includes a first fixed end 121 and a first swing end 122. The first fixed end 121 is rotatably assembled on the first fixed seat 11. A first contact member 14 is provided on the first swing end 122. The first contact member 14 is used to lap on the first edge of the tray 50. The first sensor 13 is provided on the first swing end 122;

[0038] The second detection component 20, the second detection component 20 includes a second fixed seat 21, a second swing arm 22 and a second sensor. The second fixed seat 21 is used to be fixed on the transmission base and is located on the other side of the transmission direction of the tray 50. The second swing arm 22 includes a second fixed end 221 and a second swing end 222. The second fixed end 221 is rotatably assembled on the second fixed seat 21. A second contact member 24 is provided on the second swing end 222. The second contact member 24 is used to lap on the second edge of the tray 50. The second swing end 222 is connected to the first swing end 122 through a connecting shaft 30, so that the first swing arm 12 and the second swing arm 22 swing synchronously. The second sensor is provided on the second swing end 222. One of the second sensor and the first sensor 13 is a transmitting end, and the other is a receiving end, and the transmitting end and the receiving end are arranged oppositely.

[0039] The stacking detection device provided by the embodiment of the present application. The first fixed seat 11 is used to be fixed on the transmission base, on one side of the transmission direction of the tray 50, and provides an installation foundation for the first swing arm 12. The first swing arm 12 is rotationally assembled on the first fixed seat 11 through its first fixed end 121, so that the first swing end 122 can swing flexibly. The first contact member 14 on the first swing end 122 overlaps on the first edge of the tray 50. In this way, the swing amplitude of the first swing arm 12 changes following the tray 50. The second fixed seat 21 is also fixed on the transmission base, on the other side of the transmission direction of the tray 50. The second fixed end 221 of the second swing arm 22 is rotationally assembled on the second fixed seat 21. The second contact member 24 on the second swing end 222 overlaps on the second edge of the tray 50. The first swing end 122 and the second swing end 222 are connected by a connecting shaft 30 to realize the synchronous swing of the first swing arm 12 and the second swing arm 22. By arranging the first sensor 13 on the first swing end 122 and the second sensor on the second swing end 222, the transmitting end and the receiving end of the sensor are arranged opposite to each other, and are used to detect the stacking situation of the tray 50. In this way, whether the tray 50 is deformed or its position changes, since the contact members on the swing ends of the swing arms always overlap with the tray 50, the sensors on the swing ends also change following the position of the tray 50, so that the sensors can effectively and accurately detect whether there is material stacking, the detection is more sensitive, and there will be no false detection situation, which helps to improve the accuracy and stability of material transmission in the production process, and improves production efficiency and quality.

[0040] Specifically, as Figure 3 shown, in order to reduce the friction between the first contact member 14 and the tray 50, the first contact member 14 includes a first bearing 141. The first bearing 141 includes a first fixed inner ring 1411 and a first rotating outer ring 1412. The first fixed inner ring 1411 is fixed to the first swing arm 12, and the first rotating outer ring 1412 is used to overlap on the first edge of the tray 50; the second contact member 24 includes a second bearing. The second bearing includes a second fixed inner ring and a second rotating outer ring. The second fixed inner ring is fixed to the second swing arm 22, and the second rotating outer ring is used to overlap on the second edge of the tray 50. In this way, during the transmission process of the tray 50, it contacts and relatively moves with the first rotating outer ring 1412 and the second rotating outer ring. Since the rotating outer ring can rotate, compared with a fixed contact surface, the rotating outer ring can greatly reduce the sliding friction with the edge of the tray 50, thereby significantly reducing wear. This extends the service life of the contact member and the tray 50, reduces the frequency of replacement and maintenance, and at the same time generates less resistance and will not cause too much obstruction to the normal transmission of the tray 50, which is beneficial to improving the efficiency and stability of the entire production process.

[0041] Furthermore, the first contact member 14 further includes a first fixing shaft 142 passing through the first swing arm 12. The first fixing inner ring 1411 is fixed on the first fixing shaft 142. The installation position of the first fixing shaft 142 relative to the first swing arm 12 is adjustable in the vertical direction. By changing the height position of the fixing shaft, the contact pressure and angle between the first contact member 14 and the edge of the tray 50 can be adjusted, so that the first contact member 14 fits better with the tray 50, which helps to improve the sensitivity and accuracy of detection, and can detect the stacked material situation more accurately. During the transmission process of the tray 50, there may be slight deviations in the vertical position. The adjustable fixing shaft can adapt to this deviation to ensure that the contact member always maintains good contact with the edge of the tray 50, thereby ensuring the reliability of detection and increasing the versatility of the device. Similarly, the second contact member 24 further includes a second fixing shaft passing through the second swing arm 22. The second fixing inner ring is fixed on the second fixing shaft. The installation position of the second fixing shaft relative to the second swing arm 22 is adjustable in the vertical direction.

[0042] Specifically, in a possible implementation manner, as Figure 4 shown, the first swing arm 12 is provided with a first long hole 1221 in the horizontal direction. The dimension of the first long hole 1221 in the vertical direction is greater than the diameter of the first fixing shaft 142. The first long hole 1221 provides a large vertical adjustment range, enabling the first fixing shaft 142 to adjust its position within a large vertical range. The first swing arm 12 is respectively provided with a first vertical threaded hole 1222 and a second vertical threaded hole 1223 on the opposite sides of the first long hole 1221 in the vertical direction. Both the first vertical threaded hole 1222 and the second vertical threaded hole 1223 communicate with the first long hole 1221. A first locking set screw is arranged in the first vertical threaded hole 1222, and a second locking set screw is arranged in the second vertical threaded hole 1223. Both the first locking set screw and the second locking set screw abut against the first fixing shaft 142. By loosening and tightening the first locking set screw and the second locking set screw, the first fixing shaft 142 moves to the required position within the first long hole 1221, and then the set screws are tightened for fixation to ensure that the first fixing shaft 142 does not move, thereby ensuring the stability and accuracy of detection. The adjustment method is simple and fast, without complex tools and operation procedures, improving the efficiency of equipment debugging and maintenance.

[0043] Similarly, the second swing arm 22 is provided with a second long hole in the horizontal direction. The dimension of the second long hole in the vertical direction is greater than the diameter of the second fixing shaft. The second swing arm 22 is respectively provided with a third vertical threaded hole and a fourth vertical threaded hole on the opposite sides of the second long hole in the vertical direction. Both the third vertical threaded hole and the fourth vertical threaded hole communicate with the second long hole. A third locking set screw is arranged in the third vertical threaded hole, and a fourth locking set screw is arranged in the fourth vertical threaded hole. Both the third locking set screw and the fourth locking set screw abut against the second fixing shaft to achieve the adjustability of the installation position of the second fixing shaft relative to the second swing arm 22 in the vertical direction.

[0044] In actual production, trays 50 of various thickness specifications may be used. Therefore, in this embodiment, the first swing end 122 of the first swing arm 12 is supported by a first adjusting member 1224 and the drive base, so that the distance between the first swing end 122 and the drive base is adjustable. The second swing end 222 of the second swing arm 22 is supported by a second adjusting member and the drive base, so that the distance between the second swing end 222 and the drive base is adjustable. By adjusting the first adjusting member 1224 and the second adjusting member, the first swing end 122 and the second swing end 222 can accommodate trays 50 of different thicknesses, reasonably adjust the distance between the swing end and the drive base, adjust the detection device to the optimal working state, and reduce the debugging time and cost.

[0045] Specifically, in a possible implementation manner, a first threaded through hole is provided on the first swing arm 12 in the vertical direction. The first adjusting member 1224 includes a first adjusting bolt, and the first adjusting bolt is matched with the first threaded through hole. The lower end of the first adjusting bolt is used to support on the drive base. The cooperation between the first adjusting bolt and the first threaded through hole realizes the adjustment of the distance between the first swing end 122 and the drive base by screwing the first swing arm 12 to different positions of the first adjusting bolt. The threaded structure enables continuous adjustment, can accurately control the distance between the first swing end 122 and the drive base, meets different requirements for detection accuracy and sensitivity, and at the same time, the adjustment process is relatively simple, saving time and labor costs. Since the threaded adjustment has good repeatability, each time the distance needs to be readjusted, it can be more accurately restored to the previously set position, or quickly adjusted according to the known adjustment amount.

[0046] Similarly, a second threaded through hole is provided on the second swing arm 22 in the vertical direction. The second adjusting member includes a second adjusting bolt, and the second adjusting bolt is matched with the second threaded through hole. The lower end of the second adjusting bolt is used to support on the transfer base to adjust the distance between the second swing end 222 and the drive base.

[0047] In a possible implementation manner, the first fixed end 121 is rotationally assembled on the first fixed seat 11 through a third bearing 111, and the second fixed end 221 is rotationally assembled on the second fixed seat 21 through a fourth bearing. The bearing can better reduce friction and wear, improve the rotation accuracy and flexibility of the swing arm, and the installation and disassembly are relatively simple, facilitating maintenance, replacement or adjustment when needed. In another possible implementation manner, the first fixed end 121 can also be rotationally assembled on the first fixed seat 11 by means of bushing assembly, pin shaft connection or spline connection.

[0048] In this embodiment, the connecting shaft 30 is detachably connected to the first swing arm 12 and the second swing arm 22. When the connecting shaft 30 is worn, damaged or fails, it can be conveniently disassembled for repair or replacement. At the same time, the connecting shaft 30 can be produced and stocked as an independent standard component, which is convenient for general use in different detection devices. Since the connecting shaft 30 is adjusted according to the distances of different trays 50, the production cost and the difficulty of inventory management are reduced. During the commissioning and calibration stages of the equipment, when the detection device is not in use and needs to be transported or stored, the connecting shaft 30 can be disassembled to reduce the overall volume, which is convenient for handling and storage, and reduces the transportation cost and the occupation of storage space.

[0049] Specifically, the first swing arm 12 is sleeved on the connecting shaft 30. The first swing arm 12 is provided with a first clamping gap 1225, a first fastening hole 1226 and a first locking member 1227. The first clamping gap 1225 is arranged along the axial direction of the connecting shaft 30. The first fastening hole 1226 is vertically arranged through the first clamping gap 1225. The first locking member 1227 passes through the first fastening hole 1226 to fix the connecting shaft 30 and the first swing arm 12. The second swing arm 22 is sleeved on the connecting shaft 30. The second swing arm 22 is provided with a second clamping gap, a second fastening hole and a second locking member. The second clamping gap is arranged along the axial direction of the connecting shaft 30. The second fastening hole is vertically arranged through the second clamping gap. The second locking member passes through the second fastening hole to fix the connecting shaft 30 and the second swing arm 22. The adjustment is convenient and the fixing effect is good.

[0050] In this embodiment, further, one of the transmitting end and the receiving end is arranged at a position close to the first bearing 141 of the first swinging end 122, and the other of the transmitting end and the receiving end is arranged at a position close to the second bearing on the second swinging end 222. The positions of the transmitting end and the receiving end of the sensor close to the first bearing 141 and the second bearing mean that the transmitting end and the receiving end are closer to the edge of the tray 50, and can more directly detect the stacking condition of the materials in the tray 50, improving the sensitivity and timeliness of detection. At the same time, the space close to the bearing at the swinging end is fully utilized, making the structure of the whole detection device more compact, reducing the unnecessary space occupation, and being convenient for installation and layout in a limited space.

[0051] In this embodiment, the stacked material detection device further includes a control system, which is electrically connected to the first sensor 13 and the second sensor. The control system includes an alarm module. When the control system determines that the signals between the transmitter and the receiver are abnormal, the alarm module issues an alarm. When it detects the signal abnormality between the transmitter and the receiver caused by stacked materials, it can quickly trigger the alarm module, enabling the operator to learn about the problem immediately, so as to take measures in a timely manner to avoid further deterioration of the problem. A timely alarm can prevent production accidents that may be caused by unprocessed stacked materials, avoid production interruptions or errors in subsequent processes due to undetected stacked materials, reduce unnecessary downtime and rework, contribute to improving the overall production efficiency, and timely handle the stacked material situation, which can effectively reduce the defective products caused by stacked materials, improve the product qualification rate and quality consistency. The triggering of the alarm provides a clear clue for subsequent fault troubleshooting, helps quickly locate the problem, shortens the repair time and reduces the repair cost.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stack detection device is used to detect the stacking condition of materials on the tray of a transmission device. The transmission device includes a transmission base and a transmission component provided on the transmission base. The transmission component drives the tray to move. It is characterized in that, The stacking detection device comprises: A first detection component, the first detection component includes a first fixed seat, a first swing arm and a first sensor, the first fixed seat is used to be fixed on the transmission base and is located on one side of the transmission direction of the material tray, the first swing arm includes a first fixed end and a first swing end, the first fixed end is rotatably assembled on the first fixed seat, the first swing end is provided with a first contact piece, the first contact piece is used to overlap the first edge of the material tray, and the first sensor is provided on the first swing end; The second detection component, the second detection component includes a second fixed seat, a second swing arm and a second sensor, the second fixed seat is used to be fixed on the transmission base and is located on the other side of the transmission direction of the material tray, the second swing arm includes a second fixed end and a second swing end, the second fixed end is rotatably assembled on the second fixed seat, a second contact piece is provided on the second swing end, the second contact piece is used to overlap the second edge of the material tray, the second swing end is connected to the first swing end through a connecting shaft so that the first swing arm and the second swing arm swing synchronously, the second sensor is arranged on the second swing end, one of the second sensor and the first sensor is a transmitting end, and the other is a receiving end, and the transmitting end and the receiving end are arranged opposite to each other.

2. The stacked material detection device according to claim 1, characterized in that The first contact member includes a first bearing, the first bearing includes a first fixed inner ring and a first rotating outer ring, the first fixed inner ring is fixed to the first swing arm, and the first rotating outer ring is used to overlap the first edge of the tray; The second contact member includes a second bearing, the second bearing includes a second fixed inner ring and a second rotating outer ring, the second fixed inner ring is fixed to the second swing arm, and the second rotating outer ring is used to overlap the second edge of the tray.

3. The stack material detection device according to claim 2, wherein The first contact member further comprises a first fixed shaft passing through the first swing arm, the first fixed inner ring is fixed on the first fixed shaft, and the installation position of the first fixed shaft relative to the first swing arm is adjustable in the vertical direction; The second contact member further includes a second fixed shaft passing through the second swing arm, the second fixed inner ring is fixed on the second fixed shaft, and the installation position of the second fixed shaft relative to the second swing arm is adjustable in the vertical direction.

4. The stacked material detection device according to claim 3, characterized in that, The first swing arm is provided with a first long hole in the horizontal direction, the size of the first long hole in the vertical direction is larger than the diameter of the first fixed shaft, the first swing arm is provided with a first vertical threaded hole and a second vertical threaded hole on two opposite sides of the first long hole in the vertical direction, the first vertical threaded hole and the second vertical threaded hole are both connected to the first long hole, a first locking top screw is arranged in the first vertical threaded hole, and a second locking top screw is arranged in the second vertical threaded hole, and the first locking top screw and the second locking top screw are both in contact with the first fixed shaft; The second swing arm is provided with a second long hole in the horizontal direction, the size of the second long hole in the vertical direction is larger than the diameter of the second fixed shaft, the second swing arm is respectively provided with a third vertical threaded hole and a fourth vertical threaded hole on two opposite sides of the second long hole in the vertical direction, both the third vertical threaded hole and the fourth vertical threaded hole communicate with the second long hole, a third locking set screw is arranged in the third vertical threaded hole, a fourth locking set screw is arranged in the fourth vertical threaded hole, and both the third locking set screw and the fourth locking set screw abut against the second fixed shaft.

5. The stack material detection device according to claim 1, characterized in that The first swing end is supported by a first adjusting member and a transmission base, so that the distance between the first swing end and the transmission base is adjustable; The second swing end is supported by a second adjusting member and a transmission base, so that the distance between the second swing end and the transmission base is adjustable.

6. The stack detection device according to claim 5, wherein A first threaded through hole is arranged on the first swing arm in the vertical direction, the first adjusting member includes a first adjusting bolt, the first adjusting bolt is matched with the first threaded through hole, and the lower end of the first adjusting bolt is used for supporting on the transmission base; A second threaded through hole is arranged on the second swing arm in the vertical direction, the second adjusting member includes a second adjusting bolt, the second adjusting bolt is matched with the second threaded through hole, and the lower end of the second adjusting bolt is used for supporting on the transfer base.

7. The stacked material detection device according to claim 1, wherein The first fixed end is rotationally assembled on the first fixed seat through a third bearing, and the second fixed end is rotationally assembled on the second fixed seat through a fourth bearing.

8. The stack material detection device according to claim 1, characterized in that, The connecting shaft is detachably connected to the first swing arm and the second swing arm.

9. The stack material detection device according to claim 2, wherein One of the transmitting end and the receiving end is arranged at a position of the first swing end close to the first bearing, and the other of the transmitting end and the receiving end is arranged at a position of the second swing end close to the second bearing.

10. The stacked material detection device according to claim 1, wherein The stacking detection device further includes a control system, the control system is electrically connected to the first sensor and the second sensor, the control system includes an alarm module, and when the control system determines that the signals of the transmitting end and the receiving end are abnormal, the alarm module issues an alarm.

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