Board feeding machine for printed circuit board and use method of board feeding machine

Abstract

The invention discloses a board feeding machine for a printed circuit board and a use method of the board feeding machine, and belongs to the technical field of circuit board processing. A board feeding machine for a printed circuit board comprises an equipment body and further comprises a lifting part, the lifting part is arranged in the equipment body and comprises a lifting platform and a first driving mechanism used for driving the lifting platform to ascend and descend, and an auxiliary conveyor is arranged at the bottom of the lifting platform; the material transferring frame is contained on the lifting platform, and a self-adaptive partition plate mechanism used for placing the printed circuit boards in a stacked mode is arranged in the material transferring frame; the feeding part is arranged on one side of the equipment main body; the self-adaptive clamping mechanism is arranged at the front end of the material pushing rod and automatically clamps and releases the uppermost layer of circuit board when the material pushing rod advances, so that automatic and lossless single-chip board taking and feeding actions are completed, and the problems of low manual operation efficiency and board surface damage in the pushing process are effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of printed circuit board processing technology, and in particular to a board loading machine for printed circuit boards and its usage method. Background Technology

[0002] In automated production lines for printed circuit boards (PCBs), a loading machine is typically used to continuously and smoothly transport stacked PCBs to the next process equipment, such as pick-and-place machines or printers. Existing loading machines generally employ a "loading frame - lifting platform - push rod ejection" working mode.

[0003] However, the above model has the following shortcomings in practical applications:

[0004] Risk of damage during material ejection: When the push rod ejects the circuit board, the circuit board only relies on the friction of the transfer frame partition and its own weight to maintain its position. During the rapid ejection process, the edge of the board is very likely to be rigidly scraped and collided with the inner wall of the front edge of the partition, which poses a serious risk of damaging the board surface and affecting product quality.

[0005] Loading efficiency and risks: When manually loading PCBs, the boards need to be pushed one by one from the opening on one side of the transfer frame into the narrow slot formed by the upper and lower partitions. During this pushing process, the side of the board is constantly rubbing against the inner wall of the partition, which not only aggravates wear, but also, because the partitions are dense, it is very easy to miss (i.e., no PCB is placed in a slot) or stack (two PCBs are mistakenly placed in the same slot), which affects the stability and reliability of subsequent automated production.

[0006] Equipment cycle time and efficiency bottleneck: Lifting and pushing are two independent, sequential, and connected actions. The equipment cycle time is limited by the total cycle time of "lifting to position → stopping → pushing → push rod resetting → lifting again", which has an inherent efficiency ceiling, preventing the processing efficiency from being improved. Summary of the Invention

[0007] The purpose of this invention is to solve the problems existing in the prior art by proposing a board loading machine for printed circuit boards and its usage method.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A board loading machine for printed circuit boards includes a main body and further includes:

[0010] The lifting section is located inside the main body of the equipment and includes a lifting platform and a first drive mechanism for driving the lifting platform to rise and fall. An auxiliary conveyor is provided at the bottom of the lifting platform.

[0011] A transfer frame is placed on a lifting platform, and an adaptive partition mechanism for stacking printed circuit boards is provided inside the transfer frame.

[0012] The feeding section is located on one side of the main body of the equipment and includes a fixed frame located on the outside of the main body of the equipment, an upper conveyor installed on the upper side of the fixed frame, and a lower conveyor installed on the lower side of the fixed frame.

[0013] The material pushing part is mounted on a fixed frame and includes a material pushing rod and a second drive mechanism for driving the material pushing rod to move in a horizontal direction;

[0014] The push rod is equipped with an adaptive clamping mechanism at its front end. When the second drive mechanism drives the push rod to move toward the material transfer frame, it can automatically clamp and release the printed circuit board located on the top layer.

[0015] Preferably, the adaptive partition mechanism includes:

[0016] A fixed sidewall, which is an inner sidewall of the transfer frame;

[0017] The movable sidewall is parallel to and slidably disposed within the transfer frame, which is also parallel to the fixed sidewall.

[0018] The first set of partition units is fixedly installed on the fixed sidewall;

[0019] The second set of partition units is fixedly disposed on the movable sidewall and is disposed opposite to the first set of partition units to jointly form multiple partition slots for accommodating the printed circuit board.

[0020] And a spacing adjustment component, wherein an adjustment screw is threadedly connected to the side wall of the transfer frame, one end of the adjustment screw is connected to the movable side wall, and is used to adjust the distance between the movable side wall and the fixed side wall to accommodate printed circuit boards of different sizes.

[0021] Preferably, the first group of separating units and the second group of separating units have the same structure, both including:

[0022] Erect a pole;

[0023] Multiple separators are slidably fitted onto the upright at equal intervals along the vertical direction;

[0024] A bottom support is disposed below the lowest partition;

[0025] And a linkage rope, which connects the adjacent partitions and the bottom partition to the bottom support.

[0026] Preferably, the bottom support includes a lower fixed seat fixed to the bottom end of the upright, a lower sliding seat slidably sleeved on the upright, a lower elastic member disposed between the lower fixed seat and the lower sliding seat, and a movable support plate fixed on the lower sliding seat;

[0027] The separator includes an upper fixed seat fixedly sleeved on the upright, an upper sliding seat slidably sleeved on the upright and located above the upper fixed seat, an upper elastic element disposed between the upper sliding seat and the upper fixed seat, and an L-shaped support plate rotatably connected to the upper sliding seat via a rotating shaft. A counterweight is disposed in one plate of the L-shaped support plate.

[0028] The upper end of the linkage rope is connected to the L-shaped support plate of the upper partition, and the lower end is connected to the upper sliding seat of the lower partition, or to the lower sliding seat of the bottom support.

[0029] Preferably, the adaptive clamping mechanism includes:

[0030] Two clamping plates are symmetrically rotatably connected to both sides of the front end of the push rod via a rotating shaft;

[0031] Two connecting rods, one end of each connecting rod being hinged to the middle of the corresponding clamping plate;

[0032] A movable block is movably disposed at the front end of the push rod and is hinged together with the other ends of the two connecting rods;

[0033] And a reset elastic element, which is disposed between the moving block and the end of the push rod.

[0034] Preferably, the push rod is provided with a triggering and resetting component for driving the adaptive clamping mechanism to perform clamping and releasing actions;

[0035] The triggering and reset component includes:

[0036] A movable screw, which is threadedly engaged with the push rod;

[0037] Two one-way transmission gears are slidably sleeved on both ends of the moving screw through a keyway structure, and are rotatably mounted on the side wall of the push rod around their own axis;

[0038] A collar, which is rotatably fitted onto the movable screw;

[0039] And a traction rope, which connects the collar and the moving block;

[0040] The fixed frame is provided with a lower trigger rack and an upper trigger rack on the paths corresponding to the extension and return strokes of the push rod, respectively. The lower trigger rack and the upper trigger rack are used to mesh with the corresponding one-way transmission gears in sequence when the push rod moves, so as to drive the moving screw to rotate forward or reverse.

[0041] Preferably, the push rod includes a main rod portion connected to the second drive mechanism and a secondary rod portion rotatably connected to the front end of the main rod portion via a horizontal hinge shaft;

[0042] The adaptive clamping mechanism is located at the front end of the auxiliary rod. A positioning pin connected to the traction rope is slidably disposed inside the auxiliary rod. A positioning hole that cooperates with the positioning pin is opened at the front end of the main rod. When the positioning pin is inserted into the positioning hole, the main rod and the auxiliary rod maintain a straight alignment.

[0043] Preferably, the second drive mechanism includes a second lead screw rotatably mounted on a fixed frame, a second sleeve threadedly engaged with the second lead screw, a connecting plate connecting the second sleeve and the push rod, and a second motor fixedly mounted on the fixed frame for driving the second lead screw to rotate.

[0044] Preferably, the first drive mechanism includes a first lead screw rotatably installed inside the equipment body, a first sleeve threadedly engaged with the first lead screw and fixedly connected to the lifting platform, and a first motor for driving the first lead screw to rotate.

[0045] This invention also discloses a method for using a board loading machine for printed circuit boards, comprising the following steps:

[0046] S1: Circuit board loaded into transfer frame:

[0047] The first circuit board is placed on the movable tray at the bottom of the transfer frame. The weight of the circuit board presses down on the movable tray and the lower sliding seat, compressing the lower elastic element. The lower sliding seat moves down and pulls down one end of the L-shaped support plate of the lowest layer of the separator through the linkage rope, so that it overcomes the torque of the counterweight block and rotates around the rotating shaft, making its horizontal plate part parallel to the movable tray, together forming the first separator groove.

[0048] Place the second circuit board on the raised L-shaped support plate. The weight of the circuit board presses down on the L-shaped support plate and its connected upper sliding seat, compressing the upper elastic element. The upper sliding seat moves down and pulls down the L-shaped support plate of the upper partition through the linkage rope, causing it to rotate and form the second partition groove.

[0049] Repeat the above circuit board placement steps, placing the circuit boards one by one from bottom to top. Each time a circuit board is placed, its gravity will automatically open a new partition slot above it, until all circuit boards have been placed.

[0050] S2: Material transfer box loading and positioning:

[0051] Place the transfer frame filled with circuit boards at the feed end of the lower conveyor, start the lower conveyor to transport the transfer frame to the lifting platform, and use the auxiliary conveyor to help position it. Then start the first drive mechanism to drive the lifting platform to rise until the top circuit board reaches the preset push position, and the push position is aligned with the axis of the push rod.

[0052] S3: Automatic clamping and ejection circuit board:

[0053] The second drive mechanism is activated, driving the push rod to move towards the transfer frame. In the initial stage of the push rod's advance, a one-way transmission gear installed on its side meshes with the lower trigger rack fixed on the fixed frame. This one-way transmission gear is driven to rotate, causing the moving screw to rotate in the forward direction. Due to the threaded engagement between the moving screw and the push rod, the rotation causes it to move axially and pulls the traction rope through the collar. The traction rope drives the positioning pin to move from the secondary rod to the main rod. The positioning pin is inserted into the positioning hole. The main rod and the secondary rod maintain a rigid straight state, and the movement of the traction rope applies a force to the moving block. The moving block pulls the middle of the two clamping plates through two connecting rods, causing the front ends of the two clamping plates to come together, completing the flexible clamping of the component-free areas on the upper and lower sides of the top circuit board. The clamping action will cause the circuit board to move upward, causing it to detach from the contact of the L-shaped support plate below.

[0054] As the pusher bar continues to move forward, the two clamping plates hold the circuit board and smoothly move it out of the transfer frame, pushing it to the receiving position of the next process. During this period, the circuit board does not come into contact with the inner wall of the separator.

[0055] As the circuit board is pushed forward, another one-way transmission gear meshes with the upper trigger rack, driving the moving screw to rotate in the opposite direction. The moving screw resets and then releases the traction rope. Under the action of the reset elastic element, the moving block resets, pushing the two clamping plates to open and automatically releasing the circuit board, which then falls to the receiving position of the next process.

[0056] S4: Automatic release and pusher bar reset:

[0057] When the circuit board is delivered into place, the push rod begins its return stroke. During the reset process, when the front end of the auxiliary rod passes the edge of the next circuit board that has already been removed and is now in the highest position, the circuit board will not interfere with the auxiliary rod that has not yet been fully reset when the lifting part has not lifted the transfer frame.

[0058] During the initial pushing of multiple circuit boards inside the transfer frame, the first drive mechanism is controlled to move the lifting platform up after the push rod has fully reset.

[0059] S5: The folding and lifting actions of the push rod overlap.

[0060] After a portion of the circuit boards are conveyed inside the transfer box, there is sufficient space between the topmost circuit board and the inner wall of the transfer box for the movement of the auxiliary rod. Before the push rod has fully returned to its original position, the first drive mechanism is activated, driving the lifting platform to rise a certain distance and lifting the next circuit board towards the push position. When the auxiliary rod contacts the edge of the next circuit board to be pushed out during the return stroke, the circuit board will exert an upward force on the auxiliary rod. Since the auxiliary rod is connected to the main rod through a horizontal hinge shaft, and the traction rope has been loosened at this time, the positioning pin is disengaged from the positioning hole, releasing the lock between the main rod and the auxiliary rod. Under the obstruction of the edge of the circuit board, the auxiliary rod rotates upward around the hinge shaft, thereby folding and lifting to make way for the circuit board to move upward, while it slides over the circuit board to avoid it. This achieves partial overlap in time between the push return and the circuit board lifting actions, saving cycle time.

[0061] After the push rod is fully reset, the auxiliary rod automatically droops back to its original position under the action of gravity;

[0062] S6: Cyclic and Reset:

[0063] Repeat steps S3 to S5 until all circuit boards in the transfer box are removed in sequence, and the empty transfer box is transported by the auxiliary conveyor to the upper conveyor for delivery.

[0064] Compared with the prior art, the present invention provides a board loading machine for printed circuit boards and its usage method, which has the following beneficial effects:

[0065] 1. In this invention, by setting an adaptive clamping mechanism and a triggering and resetting component at the front end of the push rod, when the push rod moves forward to pick up material, the one-way transmission gear on it meshes with the lower trigger rack, driving the moving screw to rotate and move axially. The moving block is pulled by the traction rope, and the moving block drives the two clamping plates to close through the connecting rod, completing the flexible clamping of both sides of the uppermost circuit board. The clamping action will cause the circuit board to move slightly upward, so that it is separated from the contact of the lower L-shaped support plate. Subsequently, the push rod moves the lifted circuit board horizontally out. During the entire push-out process, the board body has no contact with the inner wall of the partition, realizing contactless material picking. This solves the problem in the prior art where the push rod directly pushes out the circuit board supported by the partition horizontally, and the edge of the board body is easily damaged by rigid scraping with the partition entrance.

[0066] 2. In this invention, by employing an adaptive partition mechanism, during loading, circuit boards are placed one by one upwards, starting from the bottom movable tray. Each time a board is placed, its gravity presses down on the lower or upper sliding seat, pulling down the end of the lower L-shaped support plate via a linkage rope. The L-shaped plate rotates around its axis under the torque difference between the counterweight and gravity, automatically forming a new, precisely sized partition slot above the placed circuit board, matching its thickness, ready to support the next board. This process eliminates the need for lateral pushing, avoiding loading friction. Furthermore, each slot is generated in real-time by the gravity of the upper circuit board, physically ensuring that one board generates one slot, fundamentally eliminating the possibility of stacking or missing boards, significantly improving loading reliability, board surface protection, and operational convenience.

[0067] 3. In this invention, the clamping / release action is triggered entirely by the horizontal movement of the push rod itself. When moving forward, the lower trigger rack meshes with a one-way gear, driving the screw to rotate forward and tighten the traction rope to perform clamping. After being pushed out to the position, the upper trigger rack meshes with another one-way gear, driving the screw to rotate in reverse and loosen the traction rope. Under the action of the reset elastic element, the clamping plate automatically opens and releases the plate. The fixed position of the rack determines the trigger point for clamping and release, ensuring the timing of the actions. The entire process is a purely mechanical forced linkage with strong anti-interference capability. It eliminates the need for sensors, solenoid valves, and corresponding control programs, solving the problems of existing technologies that rely on sensors to detect the position and control independent pneumatic or electric grippers, resulting in complex systems, high costs, and the risk of signal delay or failure.

[0068] 4. In this invention, by employing a hinged push rod, when the amount of board material in the transfer frame decreases and sufficient space appears at the top, the equipment enters a high-efficiency mode. During the return journey after the push rod clamps and pushes out the board material, the lifting platform can be started in advance to lift the next board upwards. At this time, the push rod sub-rod, which has not yet fully reset, will contact the edge of the rising board during the return journey. Since the traction rope has been loosened, the positioning pin has disengaged from the positioning hole, and the sub-rod can rotate upwards around the hinge axis and be passively folded to avoid collision. This allows the push rod return and the circuit board lifting, which were originally sequential actions, to partially overlap in time, hiding part of the lifting time in the non-productive return journey. This effectively shortens the single-board processing cycle, breaks through the cycle time bottleneck of sequential actions, and improves overall production efficiency. Attached Figure Description

[0069] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0070] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0071] Figure 3 for Figure 1A schematic diagram of the structure after removing the transfer frame;

[0072] Figure 4 This is a schematic diagram of the material transfer frame of the present invention;

[0073] Figure 5 for Figure 1 The front view;

[0074] Figure 6 This is a schematic diagram of the external structure of the pole of the present invention;

[0075] Figure 7 for Figure 6 A structural diagram from another perspective;

[0076] Figure 8 This is a schematic diagram of the pusher section of the present invention;

[0077] Figure 9 This is a cross-sectional structural diagram of the push rod of the present invention;

[0078] Figure 10 This is a schematic diagram of the structure of one end of the pull rope of the present invention;

[0079] Figure 11 This is a schematic diagram of the moving screw and unidirectional transmission gear of the present invention.

[0080] In the diagram: 1. Main body of the equipment; 101. First lead screw; 102. First sleeve; 2. Lifting section; 201. Lifting platform; 202. Auxiliary conveyor; 3. Feeding section; 301. Fixed frame; 3011. Lower trigger rack; 3012. Upper trigger rack; 302. Upper conveyor; 303. Lower conveyor; 4. Pushing section; 401. Push rod; 4011. Main rod; 4012. Secondary rod; 5. Transfer frame; 501. Movable side wall; 502. Adjusting screw; 6. Upright; 601. Divider; 6011. Upper fixed seat; 6012. Upper slide 6013, Upper elastic element; 6014, L-shaped support plate; 602, Bottom support element; 6021, Lower fixed seat; 6022, Lower sliding seat; 6023, Lower elastic element; 6024, Movable support plate; 603, Linkage rope; 7, Clamping plate; 701, Connecting rod; 702, Moving block; 703, Reset elastic element; 8, Moving screw; 801, Collar; 802, Traction rope; 10, One-way transmission gear; 11, Positioning pin; 111, Positioning hole; 12, Second lead screw; 121, Second sleeve; 122, Connecting plate; 123, Second motor. Detailed Implementation

[0081] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0082] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0083] like Figures 1 to 4 As shown, this embodiment proposes a board loading machine for printed circuit boards, including a main body 1, and further including: a lifting part 2, a transfer frame 5, a loading part 3, and a pushing part 4; the lifting part 2 is disposed inside the main body 1, including a lifting platform 201 and a first driving mechanism for driving the lifting platform 201 to rise and fall, and an auxiliary conveyor 202 is disposed at the bottom of the lifting platform 201; the transfer frame 5 is housed on the lifting platform 201, and an adaptive partition mechanism for stacking printed circuit boards is disposed inside the transfer frame 5; the loading part 3 is disposed on one side of the main body 1. The equipment includes a fixed frame 301 located on the outside of the main body 1, an upper conveyor 302 mounted on the upper side of the fixed frame 301, and a lower conveyor 303 mounted on the lower side of the fixed frame 301; a pusher 4 is mounted on the fixed frame 301 and includes a pusher rod 401 and a second drive mechanism for driving the pusher rod 401 to move in the horizontal direction; wherein, the front end of the pusher rod 401 is provided with an adaptive clamping mechanism, which can automatically clamp and release the printed circuit board located on the uppermost layer when the second drive mechanism drives the pusher rod 401 to move towards the material transfer frame 5;

[0084] Specifically, the transfer frame 5, filled with printed circuit boards, is placed at the inlet end of the lower conveyor 303, which automatically transports it to the working position of the lifting platform 201. An auxiliary conveyor 202 assists in precise positioning. The auxiliary conveyor 202, lower conveyor 303, and upper conveyor 302 can all be existing belt conveyors or chain conveyors. The first drive mechanism is activated, driving the lifting platform 201 upwards until the height of the topmost printed circuit board in the transfer frame 5 is precisely aligned with the pushing path of the pusher rod 401. The second drive mechanism is activated, driving the pusher rod 401 horizontally towards the transfer frame 5. As the pusher rod 401 advances towards the target circuit board, its adaptive clamping mechanism automatically triggers and clamps the circuit board. Subsequently, the pusher rod 401 continues to advance, horizontally and smoothly removing the clamped circuit board from the transfer frame 5 and placing it on the equipment for the next process. On other connecting platforms; once the circuit board is delivered to the designated position, the adaptive clamping mechanism automatically releases the clamping state, releasing the circuit board. The pusher 401 then fully retracts to the initial position, and the first drive mechanism drives the lifting platform 201 to rise by one board spacing, sending the next circuit board to the push position. The above pushing steps are repeated, and so on, until all circuit boards in the transfer frame 5 are taken out in sequence. The empty transfer frame 5 can finally be sent out of the equipment by the auxiliary conveyor 202 and the upper conveyor 302, completing a complete batch of loading operations. Through the automated linkage of the lifting unit 2, the loading unit 3, and the pusher 4, the automatic conveying of the transfer frame 5, the automatic positioning of the board, and the single-sheet separation and pushing are realized, which significantly improves the loading cycle and production efficiency, reduces the reliance on manpower, and ensures the consistency and stability of the operation process. Moreover, the combination of horizontal pushing and adaptive clamping avoids hard scratching of the board surface and effectively prevents damage to the circuit board.

[0085] like Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, in a preferred embodiment, based on the above method, the adaptive partition mechanism further includes:

[0086] The fixed sidewall is an inner sidewall of the transfer frame 5;

[0087] The movable sidewall 501 is parallel to and slidably disposed within the transfer frame 5;

[0088] The first set of partition units is fixedly installed on the fixed side wall;

[0089] The second set of partition units is fixedly installed on the movable side wall 501 and is arranged opposite to the first set of partition units to form multiple partition slots for accommodating printed circuit boards.

[0090] And a spacing adjustment component, an adjustment screw 502 is threadedly connected to the side wall of the transfer frame 5, one end of the adjustment screw 502 is connected to the movable side wall 501, used to adjust the distance between the movable side wall 501 and the fixed side wall to accommodate printed circuit boards of different sizes.

[0091] Furthermore, the first group of dividing units and the second group of dividing units have the same structure, both including:

[0092] 6 poles;

[0093] Multiple separators 601 are slidably sleeved on the upright 6 at equal intervals along the vertical direction;

[0094] A bottom support 602 is disposed below the lowest partition 601;

[0095] And a linkage rope 603, which connects adjacent partitions 601 and the bottom partition 601 and the bottom support 602;

[0096] Furthermore, the bottom support 602 includes a lower fixed seat 6021 fixed to the bottom end of the upright 6, a lower sliding seat 6022 slidably sleeved on the upright 6, a lower elastic member 6023 disposed between the lower fixed seat 6021 and the lower sliding seat 6022, and a movable support plate 6024 fixed on the lower sliding seat 6022.

[0097] The separator 601 includes an upper fixed seat 6011 fixedly sleeved on the upright 6, an upper sliding seat 6012 slidably sleeved on the upright 6 and located above the upper fixed seat 6011, an upper elastic member 6013 disposed between the upper sliding seat 6012 and the upper fixed seat 6011, and an L-shaped support plate 6014 rotatably connected to the upper sliding seat 6012 via a rotating shaft. A counterweight is disposed in one plate of the L-shaped support plate 6014. In the natural state without load, the counterweight causes the horizontal plate portion of the L-shaped support plate 6014 to retract. When subjected to a downward pulling force, the L-shaped support plate 6014 can rotate around the shaft, causing the horizontal plate portion to flip into a horizontal state for supporting the circuit board.

[0098] The upper end of the linkage rope 603 is connected to the L-shaped support plate 6014 of the upper partition 601, and the lower end is connected to the upper sliding seat 6012 of the lower partition 601, or to the lower sliding seat 6022 of the bottom support 602.

[0099] Specifically, based on the size of the printed circuit board to be loaded, the adjusting screw 502 is rotated to drive the movable sidewall 501 to move, so that the spacing between the partition units on both sides matches the size of the circuit board. The first printed circuit board is then placed horizontally at the bottom of the transfer frame 5, and is supported by the movable trays 6024 on both sides. The combined weight of the circuit board presses down on the movable support plate 6024, causing the lower sliding seat 6022 to move down along the upright 6, compressing the lower elastic element 6023. As the lower sliding seat 6022 moves down, it pulls down the end of the L-shaped support plate 6014 of the lowest partition 601 via the connected linkage rope 603. This pulling torque overcomes the torque generated by the counterweight inside the L-shaped plate, driving the L-shaped plate to rotate around its axis. Its horizontal section flips accordingly, forming a horizontal partition groove bottom that matches the circuit board, together with the horizontal section of the opposite L-shaped plate. This prepares the space for placing the second circuit board. At this time, the lowest upper sliding seat 6012 remains in its upper position under the action of the upper elastic element 6013. The second printed circuit board is then placed into the newly formed groove, i.e., placed on the raised section. On the horizontal part of the L-shaped support plate 6014, the weight of the circuit board presses down on the L-shaped plate and its connected upper sliding seat 6012, compressing the upper elastic member 6013. The downward movement of the upper sliding seat 6012, through another linkage rope 603 connected to it, pulls down the L-shaped support plate 6014 of the upper layer of separator 601, triggering its rotation to form the bottom of the next upper separator groove. It should be noted that the height of the separator groove formed by the horizontal parts of the two L-shaped support plates 6014 is greater than the thickness of the circuit board. Then the above placement steps are repeated. Each time a new circuit board is placed, its weight will trigger the L-shaped support plate 6014 directly above it through the linkage rope 603 and make it rotate to form a new groove bottom. This process is repeated from bottom to top until all circuit boards are placed.

[0100] This physical mechanism, which places one circuit board and generates the placement position for the next, fundamentally eliminates human errors such as omissions or stacking that may occur in traditional dense partition slots. Operators only need to place the boards sequentially without having to painstakingly align them with fixed slots, simplifying the operation, speeding up the loading process, and ensuring the absolute reliability of subsequent automated material handling. Furthermore, this process does not require pushing the circuit boards horizontally, avoiding loading friction and ensuring the quality of circuit board processing.

[0101] like Figure 2 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, in a preferred embodiment, based on the above method, the adaptive clamping mechanism further includes:

[0102] Two clamping plates 7 are symmetrically connected to both sides of the front end of the push rod 401 via a rotating shaft;

[0103] Two connecting rods 701, one end of each connecting rod 701 is hinged to the middle of the corresponding clamping plate 7;

[0104] A movable block 702 is movably disposed at the front end of the push rod 401 and is hinged together with the other ends of the two connecting rods 701;

[0105] And a reset elastic element 703, which is disposed between the moving block 702 and the end of the push rod 401;

[0106] Furthermore, the push rod 401 is provided with a triggering and resetting component for driving the adaptive clamping mechanism to perform clamping and releasing actions;

[0107] The trigger and reset components include:

[0108] The movable screw 8 is threadedly engaged with the push rod 401;

[0109] Two one-way transmission gears 10 are slidably sleeved on both ends of the moving screw 8 through a keyway structure, and are rotatably mounted on the side wall of the push rod 401 around their own axis. The one-way transmission gears 10 are existing technology and adopt a flywheel structure, which includes a drive wheel that meshes with a rack and a driven wheel that is slidably connected to the keyway of the moving screw 8.

[0110] The collar 801 is rotatably sleeved on the movable screw 8;

[0111] And the traction rope 802, which is connected between the collar 801 and the moving block 702;

[0112] Among them, a lower trigger rack 3011 and an upper trigger rack 3012 are fixedly installed on the fixed frame 301 on the paths corresponding to the extension stroke and return stroke of the push rod 401, respectively; the lower trigger rack 3011 and the upper trigger rack 3012 are used to mesh with the corresponding one-way transmission gear 10 in sequence when the push rod 401 moves, driving the moving screw 8 to rotate forward or reverse.

[0113] Specifically, when the push rod 401 is in the retracted position, the two clamping plates 7 of the adaptive clamping mechanism remain open under the action of the reset elastic element 703, and the moving screw 8 and gear are in the initial position, when the second drive mechanism drives the push rod 401 to extend horizontally towards the transfer frame 5, a one-way transmission gear 10 on the side of the push rod 401 engages with the lower trigger rack 3011 fixed on the fixed frame 301. Since the rack is fixed, the forward movement of the push rod 401 forces the one-way transmission gear 10 to rotate. This gear drives the moving screw 8 to rotate through the keyway. With the threaded engagement of the push rod 401, the rotation of the screw is converted into axial movement relative to the push rod 401. This axial movement of the screw causes the collar 801 to move as well, pulling the moving block 702 closer to the push rod 401 via the traction rope 802. The movement of the moving block 702 overcomes the elastic force of the reset elastic element 703 and, through the two connecting rods 701, pulls the middle of the two clamping plates 7, causing the two clamping plates 7 to rotate around their axis and their front ends to come together, completing the automatic clamping of the uppermost printed circuit board. The clamping action occurs when the push rod 401 approaches the target. During the board clamping process, the circuit board will be slightly moved upwards to move it away from the outer wall of the L-shaped support plate 6014. Rubber pads should be placed on the clamping plate 7 to avoid damaging the circuit board. After clamping, as the push rod 401 continues to move forward, the circuit board that has been reliably fixed will be smoothly sent out of the transfer frame 5. During this period, the clamping state is maintained. When the circuit board is sent to the target position, as the push rod 401 continues to move forward, another one-way transmission gear 10 on the side of the push rod 401 engages with the upper trigger rack 3012. This one-way transmission gear 10 is driven to rotate in the opposite direction and is also driven by the push rod 401. The keyway drives the moving screw 8 to rotate in the opposite direction, thereby causing the moving screw 8 to drive the collar 801 to reset. The tension of the traction rope 802 is released. Under the restoring force of the reset elastic element 703, the moving block 702 is pushed back to the initial position, causing the clamping plate 7 to rotate in the opposite direction around the axis, and its clamping ends move away from each other, thereby automatically releasing the circuit board. Subsequently, the second drive mechanism drives the push rod 401 to start returning horizontally. During the return, the meshing of the one-way transmission gear 10 and the rack will not drive the moving screw 8 to rotate. The push rod 401 continues to return to the initial position, all components are reset, and it is ready for the next cycle.

[0114] Before being pushed out, the circuit board is flexibly clamped and slightly lifted, so that it is completely detached from the inner wall of the transfer frame 5 partition during the entire subsequent horizontal pushing stroke. This fundamentally eliminates the sliding friction and scraping that inevitably occurs between the edge of the board and the partition when the traditional push rod pushes directly. The protection of the circuit board is improved, and the scrap rate of the board surface caused by the feeding process is effectively reduced.

[0115] The power driving the clamping action comes directly from the kinetic energy of the horizontal movement of the push rod 401. It is a pure mechanical linkage that does not require any sensors, solenoid valves, controllers or circuits. It has extremely high operational reliability and anti-interference ability, avoiding the signal delay, false triggering or failure problems common in electrical control systems. At the same time, the mechanical structure is robust and durable, almost eliminating the need for complex electrical maintenance, reducing the failure rate and maintenance cost of the equipment in the long term.

[0116] like Figure 8 and Figure 9 As shown, in a preferred embodiment, based on the above method, the push rod 401 further includes a main rod 4011 connected to the second drive mechanism and a secondary rod 4012 rotatably connected to the front end of the main rod 4011 via a horizontal hinge shaft.

[0117] The adaptive clamping mechanism is located at the front end of the secondary rod 4012. A positioning pin 11 connected to the traction rope 802 is slidably disposed inside the secondary rod 4012. A positioning hole 111 that cooperates with the positioning pin 11 is opened at the front end of the main rod 4011. When the positioning pin 11 is inserted into the positioning hole 111, the main rod 4011 and the secondary rod 4012 maintain a straight alignment.

[0118] Specifically, during the cycle of the push rod 401 performing the extension-clamping-pushing action, the traction rope 802 is tightened. The tightening force of the traction rope 802 pulls the positioning pin 11 from the auxiliary rod 4012 towards the main rod 4011 until its front end is fully inserted into the positioning hole 111 of the main rod 4011. At this time, the main rod 4011 and the auxiliary rod 4012 are mechanically interlocked, maintaining a rigid connection and straight alignment in the horizontal direction, becoming a whole. In this state, when the second drive mechanism drives the main rod 4011 forward, the thrust is directly transmitted to the auxiliary rod 4012 and its front clamping mechanism through the locking point, ensuring that the pushing action is stable, powerful, and directionally accurate. When the clamping action is completed, the traction rope 802 resets, and the positioning pin 11 slides from the auxiliary rod 4012 towards the main rod 4011 until its front end is fully inserted into the positioning hole 111 of the main rod 4011. When pin 11 moves away from positioning hole 111, the secondary rod 4012 is in a state where it can rotate freely around the horizontal hinge axis. Then the push rod 401 returns. During the return of the push rod 401, if the lifting platform 201 has started to lift the next circuit board, the edge of the rising board may come into contact with the front end of the secondary rod 4012, which has not yet fully retracted. Since the secondary rod 4012 has been unlocked, it will rotate upward and lift under the action of contact force, that is, flip upward around the hinge axis, so as to pass over the rising circuit board and achieve physical avoidance. After the push rod 401 is fully reset, under the action of gravity, the unlocked secondary rod 4012 naturally hangs down and returns to the initial angle position that is roughly aligned with the main rod 4011, waiting for the locking of the next working cycle.

[0119] By cooperating with the sliding positioning pin 11 and the positioning hole 111, the push rod 401 can be locked into a rigid integral rod during the critical pushing operation stage, ensuring that the pushing force of the drive mechanism is accurately and losslessly transmitted to the clamping mechanism and circuit board, and ensuring smooth and powerful pushing. During the non-pushing return and avoidance stage, it can be unlocked into two rotatable sections, giving the front end of the rod the flexibility to avoid obstacles. This gives the single push rod 401 two working modes, intelligently adapting to different task requirements.

[0120] Furthermore, the two time-consuming actions of the push rod 401 returning and the circuit board lifting, which originally had to be performed sequentially, partially overlap in time. This hides some or even all of the lifting preparation time in the non-production return stroke, thereby effectively shortening the feeding cycle of a single circuit board, breaking the cycle bottleneck of serial actions, and significantly improving the production efficiency of the equipment.

[0121] like Figure 8 As shown, in a preferred embodiment, based on the above method, the second drive mechanism further includes a second lead screw 12 rotatably mounted on the fixed frame 301, a second sleeve 121 threadedly engaged with the second lead screw 12, a connecting plate 122 connecting the second sleeve 121 and the push rod 401, and a second motor 123 fixedly mounted on the fixed frame 301 for driving the second lead screw 12 to rotate.

[0122] Specifically, when the material feeding and pushing action needs to be performed, the control system starts the second motor 123, which drives the second lead screw 12 to rotate in a predetermined direction. Since the second sleeve 121 and the second lead screw 12 are threadedly connected, the rotation of the second lead screw 12 will force the second sleeve 121 to make a precise linear movement along the axis of the second lead screw 12. The second sleeve 121 drives the push rod 401 to move through the connecting plate 122 rigidly connected to it. When the pushing is completed and the push rod 401 needs to be retracted, the control system controls the second motor 123 to rotate in the opposite direction, so that the second sleeve 121 smoothly and accurately pulls the push rod 401 back to the initial position, completing one work cycle.

[0123] like Figure 1 , Figure 2 and Figure 3 As shown, in a preferred embodiment, based on the above method, the first drive mechanism further includes a first lead screw 101 rotatably installed in the equipment body 1, a first sleeve 102 threadedly engaged with the first lead screw 101 and fixedly connected to the lifting platform 201, and a first motor for driving the first lead screw 101 to rotate.

[0124] Specifically, when the topmost printed circuit board in the transfer frame 5 needs to be sent to the push position, the control system starts the first motor (not shown in the figure). The first motor drives the first lead screw 101 to rotate in a predetermined direction. Since the first sleeve 102 and the first lead screw 101 are threadedly engaged, the rotation of the first lead screw 101 will force the first sleeve 102 to move along the axis of the first lead screw 101. The lifting platform 201 and the transfer frame 5 and all the circuit boards it carries are lifted upward at a stable and controllable speed under the drive of the first sleeve 102. Whenever a circuit board is taken away by the push rod 401, the first motor starts again, driving the lifting platform 201 to move up one board spacing, sending the next circuit board to the push position. This cycle continues until all circuit boards are taken. Afterward, the first motor drives the first lead screw 101 to rotate in the opposite direction, causing the lifting platform 201 to descend and return to the initial lower loading position, waiting for the next full transfer frame 5 to enter.

[0125] This invention also discloses a method for using a board loading machine for printed circuit boards, comprising the following steps:

[0126] S1: The circuit board is loaded into the transfer frame 5.

[0127] The first circuit board is placed on the movable support plate 6024 at the bottom of the transfer frame 5. The weight of the circuit board presses down on the movable support plate 6024 and the lower sliding seat 6022, compressing the lower elastic element 6023. The lower sliding seat 6022 moves down and pulls down one end of the L-shaped support plate 6014 of the lowest layer separator 601 through the linkage rope 603, so that it overcomes the torque of the counterweight block and rotates around the rotating shaft, making its horizontal plate part parallel to the movable support plate 6024, together forming the first separator groove.

[0128] The second circuit board is placed on the raised L-shaped support plate 6014. The weight of the circuit board presses down on the L-shaped support plate 6014 and its connected upper sliding seat 6012, compressing the upper elastic member 6013. The upper sliding seat 6012 moves down and pulls down the L-shaped support plate 6014 of the upper layer of separator 601 through the linkage rope 603, causing it to rotate and form the second separator groove.

[0129] Repeat the above circuit board placement steps, placing the circuit boards one by one from bottom to top. Each time a circuit board is placed, its gravity will automatically open a new partition slot above it, until all circuit boards have been placed.

[0130] S2: Material transfer frame 5 loading and positioning:

[0131] Place the transfer frame 5 filled with circuit boards at the feeding end of the lower conveyor 303, start the lower conveyor 303 to transport the transfer frame 5 to the lifting platform 201, and use the auxiliary conveyor 202 to assist in positioning. Then start the first drive mechanism to drive the lifting platform 201 to rise until the top circuit board reaches the preset push position, and the push position is aligned with the axis of the push rod 401.

[0132] S3: Automatic clamping and ejection circuit board:

[0133] The second drive mechanism is activated, driving the push rod 401 to move towards the transfer frame 5. In the initial stage of the push rod 401's forward movement, a one-way transmission gear 10 mounted on its side meshes with a lower trigger rack 3011 fixed to the fixed frame 301. This one-way transmission gear 10 is driven to rotate, causing the moving screw 8 to rotate in the forward direction. Because the moving screw 8 is threadedly engaged with the push rod 401, the rotation causes axial movement, which pulls the traction rope 802 through the collar 801. The traction rope 802 then drives the positioning pin 11 from the auxiliary rod section... 4012 moves towards the main rod 4011, the positioning pin 11 is inserted into the positioning hole 111, the main rod 4011 and the auxiliary rod 4012 maintain a rigid straight state, and the movement of the traction rope 802 applies force to the moving block 702. The moving block 702 pulls the middle of the two clamping plates 7 through the two connecting rods 701, so that the front ends of the two clamping plates 7 come together, completing the flexible clamping of the component-free areas on the upper and lower sides of the top circuit board. The clamping action will cause the circuit board to move slightly upward, so that it is separated from the contact of the lower L-shaped support plate 6014.

[0134] As the push rod 401 continues to move forward, the two clamping plates 7 hold the circuit board and smoothly move it out of the transfer frame 5, pushing it to the receiving position of the next process. During this period, the circuit board does not contact the inner wall of the separator 601.

[0135] As the circuit board is pushed forward, another one-way transmission gear 10 meshes with the upper trigger rack 3012, driving the moving screw 8 to rotate in the opposite direction. The moving screw 8 resets and then releases the traction rope 802. Under the action of the reset elastic element 703, the moving block 702 resets, pushing the two clamping plates 7 to open and automatically releasing the circuit board. The circuit board falls to the receiving position of the next process.

[0136] S4: Automatic release and pusher bar 401 reset:

[0137] When the circuit board is delivered to the position, the push rod 401 begins to return to its original position. During the reset process, when the front end of the auxiliary rod 4012 passes the edge of the next circuit board that has already been removed and is now in the highest position, the circuit board will not interfere with the auxiliary rod 4012, which has not yet been fully reset, when the lifting part 2 has not lifted the transfer frame 5.

[0138] When pushing multiple circuit boards inside the transfer frame 5 in the early stage, the first drive mechanism is controlled to drive the lifting platform 201 to move upward after the push rod 401 is fully reset.

[0139] S5: The folding and lifting actions of push rod 401 overlap.

[0140] After a portion of the circuit boards are conveyed inside the transfer frame 5, there is sufficient space between the topmost circuit board and the inner wall of the top of the transfer frame 5 for the movement of the auxiliary rod 4012. Before the push rod 401 has fully returned to its original position, the first drive mechanism is activated, driving the lifting platform 201 to rise a certain distance, lifting the next circuit board towards the push position. When the auxiliary rod 4012 contacts the edge of the next circuit board to be pushed out during its return stroke, the circuit board will exert an upward force on the auxiliary rod 4012. 12 is connected to the main rod 4011 via a horizontal hinge shaft, and at this time the traction rope 802 has been released. The positioning pin 11 is dislodged from the positioning hole 111, releasing the lock between the main rod 4011 and the auxiliary rod 4012. Under the obstruction of the edge of the circuit board, the auxiliary rod 4012 rotates upward around the hinge shaft, thereby folding and lifting up to make way for the circuit board to move upward. It then slides over the circuit board to avoid it, thus achieving partial overlap in time between the two actions of pushing back the material and lifting the circuit board, saving cycle time.

[0141] After the push rod 401 is fully reset, the auxiliary rod 4012 automatically droops back to its original position under the action of gravity.

[0142] S6: Cyclic and Reset:

[0143] Repeat steps S3 to S5 until all circuit boards in the transfer box 5 are removed in sequence. The empty transfer box 5 is then transported by the auxiliary conveyor 202 to the upper conveyor 302 for delivery.

[0144] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0145] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A board loader for printed wiring boards, comprising a device body (1), characterized in that, Also include: Lifting part (2), the lifting part (2) is arranged in the equipment body (1), including lifting platform (201) and the first drive mechanism for driving lifting platform (201) to lift, the bottom of lifting platform (201) is provided with auxiliary conveyor (202); Material frame (5), the material frame (5) is housed on lifting platform (201), the self-adapting partition mechanism for stacking printed circuit board is provided in material frame (5); Feeding part (3), the feeding part (3) is arranged in the side of equipment body (1), including the fixed rack (301) arranged in the outside of equipment body (1) and the upper conveyor (302) and the lower conveyor (303) installed on the upper side of fixed rack (301) and the lower side of fixed rack (301); Pushing part (4), the pushing part (4) is arranged on fixed rack (301), including pushing rod (401) and the second drive mechanism for driving pushing rod (401) to move along horizontal direction; Wherein, the front end of pushing rod (401) is provided with self-adapting clamping mechanism, when the second drive mechanism drives pushing rod (401) to move to the direction close to material frame (5), the uppermost printed circuit board can be automatically clamped and released.

2. The board loading machine for a printed wiring board according to claim 1, wherein The self-adapting partition mechanism includes: Fixed side wall, it is one inside wall of material frame (5); Movable side wall (501), it is parallel with fixed side wall and is arranged in material frame (5); First group of separation units, it is fixedly arranged on fixed side wall; Second group of separation units, it is fixedly arranged on movable side wall (501), and it is opposite to first group of separation units to form a plurality of separation grooves for accommodating printed circuit board together; And spacing adjusting member, the adjusting screw rod (502) is threadedly connected on the side wall of material frame (5), one end of adjusting screw rod (502) is connected with movable side wall (501), for adjusting the distance between movable side wall (501) and fixed side wall, to adapt to different sizes of printed circuit board.

3. The board loading machine for a printed wiring board according to claim 2, wherein The first group of separation units and the second group of separation units are the same structure, and all include: Stand (6); A plurality of separators (601) are slidably sleeved on the stand (6) at equal intervals in the vertical direction; A bottom support (602) is arranged below the lowermost separator (601); And linkage rope (603) is connected between adjacent separators (601) and between the lowermost separator (601) and the bottom support (602).

4. The board loading machine for a printed wiring board according to claim 3, wherein The bottom support (602) includes a lower fixed seat (6021) fixed to the bottom end of the stand (6), a lower sliding seat (6022) slidably sleeved on the stand (6), a lower elastic member (6023) arranged between the lower fixed seat (6021) and the lower sliding seat (6022), and a movable support plate (6024) fixed to the lower sliding seat (6022); The partition (601) comprises an upper fixed seat (6011) fixedly sleeved on the vertical rod (6), an upper sliding seat (6012) slidably sleeved on the vertical rod (6) and located above the upper fixed seat (6011), an upper elastic member (6013) arranged between the upper sliding seat (6012) and the upper fixed seat (6011), and an L-shaped supporting plate (6014) rotationally connected to the upper sliding seat (6012) through a rotating shaft, wherein one plate body of the L-shaped supporting plate (6014) is provided with a counterweight; The upper end of the linkage rope (603) is connected to the L-shaped supporting plate (6014) of the upper partition (601), and the lower end is connected to the upper sliding seat (6012) of the lower partition (601) or the lower sliding seat (6022) of the bottom supporting member (602).

5. The board loading machine for a printed wiring board according to claim 4, wherein The self-adaptive clamping mechanism comprises: Two clamping plates (7) rotationally connected to the two sides of the front end of the pushing rod (401) through rotating shafts; Two connecting rods (701), one end of each connecting rod (701) being hingedly connected to the middle part of the corresponding clamping plate (7); A moving block (702) movably arranged at the front end of the pushing rod (401) and hingedly connected to the other ends of the two connecting rods (701); And a reset elastic member (703) arranged between the moving block (702) and the end of the pushing rod (401).

6. The board loading machine for a printed wiring board according to claim 5, wherein The pushing rod (401) is provided with a trigger and reset assembly for driving the self-adaptive clamping mechanism to perform clamping and releasing actions; The trigger and reset assembly comprises: A moving screw (8) threadedly matched with the pushing rod (401); Two one-way transmission gears (10) slidably sleeved on the two ends of the moving screw (8) through key groove structures and rotatably mounted on the side wall of the pushing rod (401); A sleeve ring (801) rotationally sleeved on the moving screw (8); And a traction rope (802) connected between the sleeve ring (801) and the moving block (702); The fixed rack (301) is provided with a lower trigger rack (3011) and an upper trigger rack (3012) corresponding to the paths of the extension stroke and the return stroke of the pushing rod (401); the lower trigger rack (3011) and the upper trigger rack (3012) are used for sequentially meshing with the corresponding one-way transmission gears (10) when the pushing rod (401) moves, so as to drive the moving screw (8) to rotate forward or reverse.

7. The board loading machine for a printed wiring board according to claim 6, wherein The pushing rod (401) comprises a main rod part (4011) connected with the second driving mechanism and a secondary rod part (4012) rotationally connected to the front end of the main rod part (4011) through a horizontal hinge shaft; The adaptive clamping mechanism is arranged at the front end of the auxiliary rod part (4012), a positioning pin (11) connected with the traction rope (802) is arranged in the auxiliary rod part (4012) in a sliding mode, and a positioning hole (111) matched with the positioning pin (11) is arranged at the front end of the main rod part (4011); when the positioning pin (11) is inserted into the positioning hole (111), the main rod part (4011) and the auxiliary rod part (4012) are kept in a linear alignment state.

8. The board loading machine for a printed wiring board according to claim 7, wherein The second driving mechanism comprises a second lead screw (12) rotatably arranged on the fixed rack (301), a second sleeve (121) threadedly matched with the second lead screw (12), a connecting plate (122) connecting the second sleeve (121) and the pushing rod (401), and a second motor (123) fixedly arranged on the fixed rack (301) and used for driving the second lead screw (12) to rotate.

9. The board loading machine for a printed wiring board according to claim 8, wherein The first driving mechanism comprises a first lead screw (101) rotatably arranged in the equipment main body (1), a first sleeve (102) threadedly matched with the first lead screw (101) and fixedly connected with the lifting platform (201), and a first motor used for driving the first lead screw (101) to rotate.

10. A method of using a board loader for printed wiring boards according to claim 9, characterized in that The method comprises the following steps: S1: loading the circuit board into the material rotating frame (5): The first circuit board is placed on the movable supporting plate (6024) at the bottom of the material rotating frame (5), the weight of the circuit board presses the movable supporting plate (6024) and the lower sliding seat (6022), the lower elastic element (6023) is compressed, the lower sliding seat (6022) moves downward, one end of the L-shaped supporting plate (6014) of the lowermost partition piece (601) is pulled downward through the linkage rope (603), the L-shaped supporting plate (6014) overcomes the moment of the counterweight and rotates around the rotating shaft, so that the horizontal plate part is parallel to the movable supporting plate (6024) and a first partition groove is formed together; The second circuit board is placed on the L-shaped supporting plate (6014) that has been lifted, the weight of the circuit board presses the L-shaped supporting plate (6014) and the upper sliding seat (6012) connected with the L-shaped supporting plate (6014), the upper elastic element (6013) is compressed, the upper sliding seat (6012) moves downward, the L-shaped supporting plate (6014) of the partition piece (601) above the upper sliding seat (6012) is pulled downward through the linkage rope (603), and the L-shaped supporting plate (6014) rotates to form a second partition groove; The above-mentioned placing step of the circuit board is repeated, and the circuit boards are placed from bottom to top in sequence, and the weight of each circuit board placed automatically opens a new partition groove above the circuit board, until all the circuit boards are placed; S2: feeding and positioning of the material rotating frame (5): The material rotating frame (5) filled with the circuit boards is placed at the feeding end of the lower conveyor (303), the lower conveyor (303) is started, the material rotating frame (5) is conveyed to the lifting platform (201), and the auxiliary conveyor (202) is used for auxiliary positioning, then the first driving mechanism is started, the lifting platform (201) is driven to rise, until the circuit board at the top reaches a preset pushing position, and the pushing position is aligned with the axis of the pushing rod (401); S3: automatic clamping and pushing out of the circuit board: The second driving mechanism is started to drive the pushing rod (401) to move towards the material rotating frame (5). In the initial stage of the pushing rod (401) advancing, a one-way transmission gear (10) installed on the side of the pushing rod (401) meshes with the lower trigger rack (3011) fixed on the fixed frame (301). The one-way transmission gear (10) is driven to rotate, thereby driving the moving screw (8) to rotate in the positive direction. Since the moving screw (8) is threadedly connected with the rod body of the pushing rod (401), the rotation of the moving screw (8) causes the moving screw (8) to move axially and pull the traction rope (802) through the sleeve ring (801). The traction rope (802) drives the positioning bolt (11) to move from the auxiliary rod part (4012) to the main rod part (4011). The positioning bolt (11) is inserted into the positioning hole (111). The main rod part (4011) and the auxiliary rod part (4012) maintain a rigid and straight state. The movement of the traction rope (802) applies a force to the moving block (702). The moving block (702) pulls the middle part of the two clamping plates (7) through the two connecting rods (701), so that the front ends of the two clamping plates (7) are close to each other. The flexible clamping of the device-free area on the upper and lower sides of the top layer of the circuit board is completed. The clamping action drives the circuit board to move upwards, so that the circuit board is separated from the contact of the lower L-shaped supporting plate (6014); With the continuous advancement of the pushing rod (401), the two clamping plates (7) stably move out of the material rotating frame (5) while clamping the circuit board, and push the circuit board to the receiving position of the next process. During this period, the circuit board is not in contact with the inner wall of the partition (601); With the pushing of the circuit board, the other one-way transmission gear (10) meshes with the upper trigger rack (3012), drives the moving screw (8) to rotate in the reverse direction, and the moving screw (8) is reset to relax the traction rope (802). Under the action of the reset elastic element (703), the moving block (702) is reset, the two clamping plates (7) are opened, and the circuit board is automatically released. The circuit board falls in the receiving position of the next process; S4: Automatic release and reset of the pushing rod (401): When the circuit board is sent to the position, the pushing rod (401) starts to return. During the reset process, when the front end of the auxiliary rod part (4012) passes the edge of the next circuit board which is in the highest position and has been taken away, the circuit board will not interfere with the auxiliary rod part (4012) which has not been completely reset when the lifting part (2) does not lift the material rotating frame (5); When the pushing rod (401) is completely reset, the lifting platform (201) is controlled to move upwards by the first driving mechanism; S5: Pushing rod (401) folding avoidance and lifting action overlap: After a part of the circuit board is transported in the transfer frame (5), the circuit board at the top has a space with the inner wall of the top of the transfer frame (5) to meet the movement of the sub-rod part (4012). When the pushing rod (401) has not been completely reset to the original position, the first driving mechanism is started to drive the lifting platform (201) to rise by a distance, and the next circuit board is lifted to the pushing position. When the sub-rod part (4012) contacts the edge of the next circuit board to be pushed during the reset return, the circuit board will exert an upward force on the sub-rod part (4012). Since the sub-rod part (4012) is connected to the main rod part (4011) through a horizontal hinge shaft, and the traction rope (802) has been loosened at this time, the positioning pin (11) is detached from the positioning hole (111), and the locking between the main rod part (4011) and the sub-rod part (4012) is released. Under the resistance of the edge of the circuit board, the sub-rod part (4012) rotates upward around the hinge shaft, thereby folding and lifting, to make way for the circuit board to move upward, and itself slides over the circuit board above to complete the avoidance, realizing the partial overlap of the pushing return and the lifting of the circuit board in time, and saving the beat time; After the pushing rod (401) is completely reset, the sub-rod part (4012) automatically falls back to the original position under the action of gravity. S6: Cycle and reset: Repeat steps S3 to S5 until all the circuit boards in the transfer frame (5) are taken in turn, and the empty transfer frame (5) is transported to the upper conveyor (302) by the auxiliary conveyor (202) for delivery.

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