Plate unloading machine

Abstract

The utility model relates to the technical field of SMT production line equipment, and discloses a plate unloading machine which comprises a lifting mechanism, a material box, a conveying mechanism, a feeding mechanism and a machine box cabinet, a material frame table is arranged on the lifting mechanism, the material box is arranged in the material frame table, the conveying mechanism comprises a box body conveying-in conveying table and a box body conveying-out platform, and the feeding mechanism is arranged on the box body conveying-out platform. The box conveying-out platform is located above the box conveying-in conveying table and connected to the side, where a material box is conveyed out, of the material frame table, the feeding mechanism comprises a supporting seat and two moving belt grooves which are formed in the supporting seat in a relatively sliding mode, the supporting seat is connected to the side, where a PCB is fed, of the material frame table and is flush with the box conveying-out platform, and the two moving belt grooves are connected to the material frame table. Sensors for signal butt joint are arranged between the two ends, facing the PCB feeding side wall, of the material box and the end walls of the corresponding movable belt grooves, and a stepping motor for driving the two movable belt grooves to slide relatively is arranged on the supporting base. The PCB feeding device has the effect of improving the butt joint accuracy between the PCB and the inserting groove in the material box in the feeding process.

Description

Technical Field

[0001] The present application relates to the technical field of SMT production line equipment, and in particular to a board unloader. Background Art

[0002] With the rapid development of the electronics industry, SMT technology has been widely used in various electronic product assembly lines. Among them, the unloader, as one of the key equipment in the automated production line, is responsible for accurately placing the soldered and cooled PCB boards into the material box, greatly improving production efficiency.

[0003] In the prior art, after PCB processing is completed using SMT technology, the unloader receives PCB boards in batches at the end of the production line in the following process: After the material box is transferred from the frame feed track to the lifting platform, the lifting platform lowers the material box to the first board entry point, at this time waiting for the board entry signal from the cooling platform in front; the PCB board is transferred from the cooling platform to the track on the unloader that transfers the PCB board. When the sensor on the front end of the track senses the PCB board, the conveyor belt starts to rotate until the PCB board is transferred into the material box; during this process, the push rod sensor on the track senses the passage of the PCB board and extends the push rod to push the PCB board into the corresponding plug-in slot in the material box; then the push rod resets, and the material box is also driven by the lifting platform to synchronously descend one station, waiting for the next board entry signal. When the PCB boards in the material box are all filled, the material box moves out of the lifting platform and moves along the frame exit track away from the lifting platform, waiting for the staff to remove the material box full of PCB boards, completing a work cycle.

[0004] The Chinese patent with announcement number CN218706827U discloses a unloader for an SMT production line, including a loading and unloading conveyor device, a unloading conveyor device, an empty frame conveyor device and a conveying mechanism. The loading and unloading conveyor device is fixedly located on the right side of the conveying mechanism, the empty frame conveyor device and the unloading conveyor device are fixedly located on the left side of the conveying mechanism, the unloading conveyor device is located directly below the empty frame conveyor device, and the empty frame conveyor device is flush with the loading and unloading conveyor device. The conveying mechanism includes a lifting platform, a guard beam, and a screw transmission device. The guard beam is fixedly connected to the lifting platform, and the lifting platform is connected to the screw transmission device for transmission. The lifting platform is driven up and down by the screw transmission device. There are two groups of lifting platforms, and the two groups of lifting platforms are placed one above the other. The lifting platform located at the bottom is connected to the screw transmission device for transmission.

[0005] While the aforementioned unloaders meet the need for efficient loading and unloading of PCBs, they can easily lead to inaccurate positioning and even damage to the PCBs as they move from the conveyor track on the loading conveyor into the PCB. This simple approach is particularly difficult to achieve when PCBs require highly precise docking, potentially leading to edge damage and jamming during the insertion process. Utility Model Content

[0006] In order to improve the docking accuracy between the PCB board and the plug-in slot on the material box during the loading process, the present application provides a board unloading machine.

[0007] The present application provides a plate unloading machine adopting the following technical solution:

[0008] A lower plate machine includes a lifting mechanism, a material box, a conveying mechanism, a feeding mechanism and a chassis cabinet, the lifting mechanism is provided with a material rack platform, the material box is arranged in the material rack platform, the conveying mechanism includes a box infeed conveying platform and a box outfeed platform, the box outfeed platform is located above the box infeed conveying platform, the box outfeed platform is connected to the side of the material box on the material rack platform where the material box is outfeed, the feeding mechanism includes a support seat and two movable belt grooves relatively slidingly arranged on the support seat, the support seat is connected to the side of the PCB board feeding on the material rack platform and is flush with the box outfeed platform, both ends of the side wall of the material box facing the PCB board feeding side are provided with signal docking sensors between the corresponding movable belt groove end walls, the support seat is provided with a stepper motor that drives the two movable belt grooves to slide relative to each other, and the stepper motor is electrically connected to the sensor.

[0009] By adopting the above technical solution, during the PCB feeding process of the unloader, the signal docking sensor between the two ends of the PCB feeding side wall on the material box and the corresponding end wall of the movable belt slot can match the size of the material slot where the PCB board is placed on the material box, drive the stepper motor to drive the two movable belt slots to slide relative to each other, thereby achieving precise adjustment of the spacing between the movable belt slots, so that the movable belt slot and the material box are accurately docked, improving the accuracy of PCB board feeding, avoiding position deviation of the PCB board during the insertion process of the PCB board into the material box plug-in slot, and reducing the occurrence of damage or jamming of the PCB board edge.

[0010] Optionally, synchronous wheels are provided on the bottom walls on both sides of the support seat along a direction perpendicular to the transmission direction of the PCB board, and a synchronous belt is provided between the two synchronous wheels. The stepping motor is coaxially fixedly connected to the rotating shaft of one of the synchronous wheels. Two clamps are provided on the synchronous belt, and the two clamps are respectively located on different sides of the synchronous wheel, and the clamps are correspondingly arranged on the bottom wall of the moving belt groove.

[0011] By adopting the above technical solution, the setting of the synchronous wheel and the synchronous belt enables the two movable belt slots to slide synchronously relative to each other under the drive of the stepper motor, thereby accurately adjusting the spacing of the movable belt slots according to the size of the slots where the PCB boards are placed on the material box, improving the positioning accuracy of the PCB boards during the feeding process, avoiding the problem of edge damage or jamming of the PCB boards when inserting into the material box, and significantly improving the accuracy and reliability of insertion.

[0012] Optionally, a guide rod is provided in the support seat along the transmission direction perpendicular to the PCB board, and multiple guide rods are provided parallel to the transmission direction of the PCB board, and a fixed block is provided at the bottom of each movable belt groove corresponding to each guide rod, and each guide rod slides through two fixed blocks together.

[0013] By adopting the above technical solution, the setting of the guide rod effectively improves the stability of the moving belt slot during the sliding process, and reduces the problem of inaccurate positioning of the PCB board caused by the shaking of the moving belt slot.

[0014] Optionally, a control system is provided on the top of the chassis cabinet, the chassis cabinet is provided on one side of the material rack platform, and the chassis cabinet is open on the side facing the material rack platform. The lifting mechanism includes a ball screw and a guide rail vertically arranged in the chassis cabinet, the ball screw is electrically connected to the control system and is rotatably arranged in the chassis cabinet, and a connecting block is provided on the side wall of the material rack platform, which is sleeved on the ball screw and the guide rail. The connecting block is rotationally engaged with the ball screw through a thread and is slidingly engaged with the guide rail.

[0015] By adopting the above technical solution, the control system installed on the top of the chassis cabinet can effectively control the rotation of the ball screw, thereby realizing the precise lifting and lowering of the material rack along the guide rail, ensuring the accurate positioning of the material box at different board entry points, avoiding the problem of inaccurate positioning of the PCB board during the feeding process, and improving production efficiency and processing quality.

[0016] Optionally, a plug-in interface is provided on the top wall of the material box on the side facing away from the direction in which the PCB board is transported, and a plug-in slot is provided on the inner bottom wall of the material box directly below the plug-in interface. A baffle is vertically provided at the plug-in interface, and the bottom of the baffle is plugged into the plug-in slot.

[0017] By adopting the above technical solution, the detachable setting of the baffle can avoid the possibility that the PCB boards in the material box extend out of the material box due to excessive transportation, thereby avoiding the occurrence of jamming in the material box lifting due to the PCB boards being exposed to the material box, and further avoiding the occurrence of edge wear due to the PCB boards being exposed to the material box.

[0018] Optionally, a mounting groove is provided on a side of the baffle facing the material box, the size of the mounting groove is set to match the inner cavity size of the material box, and a rubber pad is provided in the mounting groove.

[0019] By adopting the above technical solution, the provision of the rubber pad can effectively cushion the impact force when the PCB board is inserted into the material box, reduce the risk of damage to the edge of the PCB board, and thus improve the insertion accuracy and stability.

[0020] Optionally, an electric slide rail is provided on the support seat between the two moving belt slots along the conveying direction of the PCB board, and the electric slide rail is vertically located between the guide rod and the moving belt slot. A push block is slidingly provided on the electric slide rail, and a push rod for pushing the PCB board is provided on the side of the push block facing the material box. The push rod is rotatably hinged on the push block along a direction perpendicular to the conveying direction of the PCB board, and a torsion spring is sleeved on the push rod and the push block shaft. An L-shaped limit plate is provided at the end of the electric slide rail away from the material rack table. When the push block slides into the limit space of the limit plate, the push rod is configured to interfere with the inner top wall of the limit plate.

[0021] By adopting the above-mentioned technical solution, the push block can slide along the direction of PCB board transmission under the drive of the electric slide rail, and the PCB board is pushed to the designated position in the material box by the push rod, ensuring that the PCB board can be accurately inserted into the insertion slot of the material box. The torsion spring design at the push rod and the push block's rotating shaft makes it have a natural tendency to push outward, ensuring that the push rod can effectively contact the PCB board and apply sufficient thrust. At the same time, the L-shaped limit plate at the end of the electric slide rail can limit the position of the push rod when the push block slides to the predetermined position. This not only avoids interference with the PCB board during transmission, but also prevents the push rod from excessively deflecting and failing to correctly apply force to the PCB board, thereby improving the stability and accuracy of the PCB board when inserted into the material box.

[0022] Optionally, a rubber sleeve is provided on the end of the push rod facing the material box.

[0023] By adopting the above technical solution, the installation of the rubber sleeve can effectively reduce the hard impact when the push rod contacts the PCB board, avoid the problem of damage to the PCB board due to excessive thrust, and improve the safety and stability of the PCB board during the insertion of the material box plug-in slot.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. During the PCB feeding process, the signal docking sensors between the two ends of the PCB feeding side walls on the material box and the corresponding end walls of the moving belt slots can match the size of the material slots where the PCBs are placed on the material box. The stepper motor drives the two moving belt slots to slide relative to each other, thereby achieving precise adjustment of the spacing between the moving belt slots, so that the moving belt slots and the material box are precisely docked. This improves the accuracy of PCB feeding and avoids positional deviation of PCBs when inserting them into the material box insertion slots, thereby reducing the risk of PCB edge damage or jamming.

[0026] 2. The arrangement of the synchronous wheel and synchronous belt enables the two moving belt slots to slide synchronously relative to each other under the drive of the stepper motor. This allows the spacing of the moving belt slots to be precisely adjusted according to the size of the slots in which the PCBs are placed on the material box. This improves the positioning accuracy of the PCBs during the feeding process, avoids edge damage or jamming of the PCBs when inserting them into the material box, and significantly improves the accuracy and reliability of insertion.

[0027] 3. The setting of the guide rod effectively improves the stability of the moving belt slot during the sliding process, and reduces the problem of inaccurate PCB board positioning caused by the shaking of the moving belt slot. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0029] Figure 2 It is a schematic diagram showing the connection relationship between the material rack and the chassis cabinet in the embodiment of the present application.

[0030] Figure 3 It is an exploded view showing the connection relationship between the material box and the baffle in the embodiment of the present application.

[0031] Figure 4 It is a cross-sectional view showing the positional relationship among the limiting plate, the push block, the push rod and the baffle in the embodiment of the present application.

[0032] Description of reference numerals:

[0033] 1. Lifting mechanism; 11. Ball screw; 12. Guide rail; 2. Material box; 21. Plug interface; 22. Plug slot; 3. Conveying mechanism; 31. Box infeed conveyor platform; 32. Box outfeed platform; 4. Feeding mechanism; 41. Support seat; 411. Guide rod; 412. Synchronous wheel; 4121. Synchronous belt; 413. Stepper motor; 42. Moving belt slot; 421. Fixed block; 422. Clamp; 5. Chassis cabinet; 51. Control system; 6. Material rack; 61. Connecting block; 7. Sensor; 8. Baffle; 81. Handle; 82. Mounting slot; 821. Rubber pad; 9. Electric slide rail; 91. Push block; 92. Push rod; 921. Rubber sleeve; 922. Torsion spring; 93. Limit plate. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-4 This application is described in further detail.

[0035] The embodiment of the present application discloses a plate lowering machine.

[0036] Reference Figure 1 and Figure 2The material box 2 is arranged in the material rack 6, and the conveying mechanism 3 includes a box infeed conveying platform 31 and a box outfeed platform 32. The box outfeed platform 32 is located above the box infeed conveying platform 31, and the box outfeed platform 32 is fixedly arranged on the side where the material box 2 is output on the material rack 6. The feeding mechanism 4 includes a support seat 41 and two moving belt slots 42. The two moving belt slots 42 are relatively slidably arranged on the support seat 41. The support seat 41 is fixedly arranged on the side where the PCB board is fed on the material rack 6 and is flush with the box outfeed platform 32. Both ends of the side wall of the material box 2 facing the PCB board feeding are fixedly provided with a signal docking sensor 7 between the corresponding end walls of the moving belt slot 42.

[0037] Reference Figure 1 and Figure 2 , place the empty material box 2 on the box body conveying conveyor 31, and the empty material box 2 is conveyed to the material rack platform 6 along with the box body conveying conveyor 31. The material rack platform 6 is driven by the lifting mechanism 1 to lower the material box 2 to the first board entry point. At this time, under the docking of the sensor 7, the movable belt slot 42 adjusts the spacing of the movable belt slot 42 according to the size of the material slot where the PCB board is placed on the material box 2; at this time, wait for the board entry signal in the front; the PCB board is transferred into the material box 2 under the transmission of the movable belt slot 42. The material box 2 also drops one station synchronously driven by the material rack platform 6 and waits for the next board entry signal. When the PCB boards in the material box 2 are all filled, the material box 2 moves out of the material rack platform 6 and is conveyed out along the box body conveying platform 32, waiting for the staff to remove the material box 2 filled with PCB boards, completing a work cycle.

[0038] Reference Figure 1 and Figure 2 The chassis cabinet 5 is open on one side facing the material rack platform 6, and the lifting mechanism 1 includes a ball screw 11 and a guide rail 12. The ball screw 11 and the guide rail 12 are both vertically arranged. The ball screw 11 is electrically connected to the control system 51 and is rotatably arranged in the chassis cabinet 5. The guide rail 12 is fixedly arranged in the chassis cabinet 5. A connecting block 61 is integrally formed on the side wall of the material rack platform 6 facing the chassis cabinet 5, which is sleeved on the ball screw 11 and the guide rail 12. The ball screw 11 and the corresponding connecting block 61 are rotated together through a thread, and the guide rail 12 and the corresponding connecting block 61 are slidably fitted together.

[0039] Reference Figure 3The top wall of the material box 2, facing away from the direction in which the PCBs are fed, is provided with an insertion port 21, which connects to the inner cavity of the box. A plug-in slot 22 is provided on the inner bottom wall of the material box 2, located directly below the insertion port 21. A baffle 8 is vertically inserted through the insertion port 21. A handle 81 is fixedly provided on the top of the baffle 8, and its bottom engages with the plug-in slot 22. A mounting slot 82 is provided on the side of the baffle 8 facing the material box 2. The size of the mounting slot 82 is set to match the inner cavity of the material box 2, and a rubber pad 821 is fixedly installed in the mounting slot 82.

[0040] Reference Figure 1 A guide rod 411 is fixedly provided in the support seat 41 along the transmission direction perpendicular to the PCB board. Multiple guide rods 411 are arranged parallel to the transmission direction of the PCB board. This embodiment takes two as an example, and a fixed block 421 is fixedly provided at the bottom of each movable belt slot 42 corresponding to each guide rod 411, and each guide rod 411 slides through two fixed blocks 421 together.

[0041] Reference Figure 1 Synchronous pulleys 412 are vertically mounted on the bottom walls of the support base 41, perpendicular to the PCB conveying direction. A synchronous belt 4121 is sleeved between the two synchronous pulleys 412. A stepper motor 413 is fixedly mounted on the bottom wall of the support base 41. Its output shaft rotates through the support base 41 and is coaxially connected to the rotating shaft of one of the synchronous pulleys 412. Two clamps 422 are clamped onto the synchronous belt 4121. The two clamps 422 are located on different sides of the synchronous pulleys 412 and are fixed to the bottom wall of the corresponding moving belt slot 42.

[0042] Reference Figure 1 and Figure 4 An electric slide 9 is installed on the support seat 41 between the two moving belt slots 42 along the conveying direction of the PCB boards. The electric slide 9 is vertically located between the guide rod 411 and the moving belt slot 42. A push block 91 is slidably provided on the electric slide 9, and a push rod 92 for pushing the PCB boards is provided on the side of the push block 91 facing the material box 2. A rubber sleeve 921 is provided on the end of the push rod 92 facing the material box 2. The push rod 92 is hinged on the push block 91 and rotates perpendicular to the conveying direction of the PCB boards. A torsion spring 922 is provided at the rotating shaft between the push rod 92 and the push block 91. The ends of the torsion spring 922 are respectively connected to the push rod 92 and the push block 91. An L-shaped limit plate 93 is fixedly provided at the end of the electric slide 9 away from the material rack 6. The end of the top cross bar of the limit plate 93 is chamfered towards the side wall of the push rod 92. When the push block 91 slides into the limiting space of the limiting plate 93, the push rod 92 is in contact with the inner top wall of the limiting plate 93; when the push block 91 slides to the limiting space away from the limiting plate 93, the torsion spring 922 is in a natural state, and the rubber sleeve 921 is pushed directly behind the PCB board.

[0043] The operating principle of a board unloading machine according to an embodiment of the present application is as follows: under the control of a control system 51, an empty material box 2 is placed on a conveyor platform 31. The empty material box 2 is then transferred to a rack platform 6 along with the material box. The ball screw 11 rotates to drive the rack platform 6 up and down, lowering the material box 2 to the first board entry point. At this point, the movable belt slot 42, under the docking of the sensor 7, adjusts the spacing of the movable belt slot 42 according to the size of the slot where the PCB boards are placed on the material box 2. At this time, the machine waits for the board entry signal from the front. The PCB boards are accurately transferred into the material box 2 by the transmission of the movable belt slot 42 and the push of the push rod 92. The material box 2 is also synchronously lowered by the rack platform 6, waiting for the next board entry signal. When the PCB boards in the material box 2 are completely filled, the material box 2 moves out of the rack platform 6 and is transported out along the box body exit platform 32, waiting for the staff to remove the material box 2 filled with PCB boards, completing a working cycle.

[0044] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A plate unloading machine, characterized in that , including a lifting mechanism (1), a material box (2), a conveying mechanism (3), a feeding mechanism (4) and a cabinet (5), wherein the lifting mechanism (1) is provided with a material rack (6), the material box (2) is provided in the material rack (6), the conveying mechanism (3) includes a box body infeed conveying platform (31) and a box body outfeeding platform (32), the box body outfeeding platform (32) is located above the box body infeed conveying platform (31), the box body outfeeding platform (32) is connected to the side of the material rack (6) where the material box (2) is outfeeded, the feeding mechanism (4) includes a support seat (4 1) and two moving belt slots (42) relatively slidably arranged on a support seat (41), the support seat (41) being connected to a side of a PCB board feeding on a material rack (6) and being flush with the box body outgoing platform (32), sensors (7) for signal docking being arranged between the two ends of the side wall of the material box (2) facing the PCB board feeding and the end walls of the corresponding moving belt slots (42), a stepping motor (413) for driving the two moving belt slots (42) to slide relative to each other being arranged on the support seat (41), the stepping motor (413) being electrically connected to the sensor (7).

2. A plate lowering machine according to claim 1, characterized in that The support seat (41) is provided with vertically rotatable synchronous wheels (412) on both sides of the bottom wall perpendicular to the PCB board transmission direction, and a synchronous belt (4121) is provided between the two synchronous wheels (412). The stepping motor (413) is coaxially fixedly connected to the rotating shaft of one of the synchronous wheels (412). Two clamps (422) are provided on the synchronous belt (4121), and the two clamps (422) are respectively located on different sides of the synchronous wheel (412), and the clamps (422) are correspondingly provided on the bottom wall of the moving belt slot (42).

3. A plate lowering machine according to claim 1, characterized in that A guide rod (411) is provided in the support seat (41) along a transmission direction perpendicular to the PCB board, and a plurality of guide rods (411) are provided in parallel along the transmission direction of the PCB board, and a fixed block (421) is provided at the bottom of each movable belt slot (42) corresponding to each guide rod (411), and each guide rod (411) slides through two fixed blocks (421) together.

4. A plate lowering machine according to claim 1, characterized in that A control system (51) is provided on the top of the chassis cabinet (5), the chassis cabinet (5) is provided on one side of the material rack (6), and the chassis cabinet (5) is open toward one side of the material rack (6). The lifting mechanism (1) includes a ball screw (11) and a guide rail (12) vertically arranged in the chassis cabinet (5), the ball screw (11) is electrically connected to the control system (51) and is rotatably arranged in the chassis cabinet (5), and a connecting block (61) is provided on the side wall of the material rack (6) and is sleeved on the ball screw (11) and the guide rail (12). The connecting block (61) is engaged with the ball screw (11) by a threaded rotation and is engaged with the guide rail (12) by a sliding motion.

5. The unloading machine according to claim 1, characterized in that The top wall of the material box (2) on the side facing away from the PCB board feeding direction is connected to the inner cavity of the box body and is provided with an insertion interface (21), and the inner bottom wall of the material box (2) directly below the insertion interface (21) is provided with an insertion groove (22), and a baffle (8) is vertically penetrated at the insertion interface (21), and the bottom of the baffle (8) is plugged into and matched with the insertion groove (22).

6. A plate lowering machine according to claim 5, characterized in that The baffle (8) is provided with a mounting groove (82) on one side facing the material box (2). The size of the mounting groove (82) is set to match the inner cavity size of the material box (2), and a rubber pad (821) is provided in the mounting groove (82).

7. The unloading machine according to claim 1, characterized in that The support seat (41) is provided with an electric slide rail (9) between the two moving belt slots (42) along the conveying direction of the PCB board. The electric slide rail (9) is vertically located between the guide rod (411) and the moving belt slot (42). A push block (91) is slidingly provided on the electric slide rail (9), and a push rod (92) for pushing the PCB board is provided on the side of the push block (91) facing the material box (2). The push rod (92) is hinged on the push block (91) along a direction perpendicular to the conveying direction of the PCB board, and a torsion spring (922) is sleeved on the rotating shaft of the push rod (92) and the push block (91). An L-shaped limit plate (93) is provided at the end of the electric slide rail (9) away from the material rack (6). When the push block (91) slides into the limit space of the limit plate (93), the push rod (92) and the inner top wall of the limit plate (93) are in contact with each other.

8. A plate lowering machine according to claim 7, characterized in that The end of the push rod (92) facing the material box (2) is sleeved with a rubber sleeve (921).

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