Centered stacking method for stacking loaded sub-pallets onto mother pallets

Abstract

The invention discloses a centering stacking method for stacking a sub-pallet with a load onto a mother pallet, which solves the centering problem when stacking sub-pallets and mother pallets; a sub-pallet and mother pallet stacking station is arranged on a roller conveyor, a lifting mechanism is arranged under the roller of the roller conveyor at the station, and the sub-pallet and mother pallet transmitted by the roller conveyor are centered and positioned in a direction perpendicular to the conveying direction through the lifting gantry on the lifting mechanism; left horizontal fork devices are respectively arranged on both sides of the sub-pallet and mother pallet stacking station, and the sub-pallet is centered and positioned in the conveying direction through the left and right forks, and finally, the sub-pallet is stacked into the mother pallet, so as to complete the centering stacking of the sub-pallet and mother pallet; the structure is simple and the centering rate is improved.

Description

Technical Field

[0001] The invention relates to a roller conveyor, in particular to a centering stacking method for stacking sub-pallets with loads on a mother pallet in a roller conveyor. Background Art

[0002] In a warehousing and logistics system with a large variety of loads (goods), the goods are stacked in a certain way on disposable pallets (sub-pallets). To prevent the pallets from being scattered, a fixing film is generally wrapped between the goods and the sub-pallets to fix the goods, and a roller conveyor is used to transport and carry the goods together with the sub-pallets. However, storage shelves usually have only one specification. Therefore, it is necessary to first center the sub-pallets of different specifications carrying different goods on the mother pallets of uniform specifications before storing them in the storage shelves. Since the roller conveyor system is usually designed and manufactured according to the specifications of the mother pallet, the guide plate of the conveyor only guides and centers the mother pallet, and cannot guide and center the smaller sub-pallets placed in the mother pallet. It often happens that the sub-pallets and the goods on them are offset after being placed in the mother pallet, resulting in the outer contour of the goods exceeding the indicators required by the shelf after the sub- and mother pallets are stacked, so that the goods cannot enter the shelf smoothly. Summary of the invention

[0003] The invention provides a centering stacking method for stacking a sub-pallet with a load on a mother pallet, which solves the centering problem when stacking the sub-pallet and the mother pallet.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The overall concept of the present invention is: a child and mother pallet stacking station is set on the roller conveyor, and a lifting mechanism is set under the roller of the roller conveyor at the station, and the child and mother pallets transmitted by the roller conveyor are centered and positioned in a direction perpendicular to the conveying direction through the lifting gantry on the lifting mechanism; left horizontal fork devices are respectively set on both sides of the child and mother pallet stacking station, and the child pallet is centered and positioned in the conveying direction through the left and right forks, and finally, the child pallet is stacked into the mother pallet, thereby completing the centered stacking of the child and mother pallets.

[0006] A centering stacking device for stacking a sub-pallet with a load onto a mother pallet comprises a roller conveyor support, on which a roller is arranged, and on the left and right sides of the roller, a mother pallet limiting guide plate is arranged, a sub-pallet is conveyed on the roller, and goods are wrapped and fixed on the sub-pallet; a mother-child pallet stacking station is arranged on the roller conveyor support, and a pallet in-place detection switch is arranged on the roller conveyor support of the mother-child pallet stacking station, and the pallet in-place detection switch is electrically connected to the driving mechanism of the roller; a lifting device mounting frame is arranged directly below the roller on the mother-child pallet stacking station, and a pallet lifting mechanism is arranged on the lifting device mounting frame, and the lifting gantry on the pallet lifting mechanism is arranged between two adjacent rollers; A left horizontal fork device support frame is arranged on the left side of the stacking station, and a left horizontal fork device is arranged at the upper end of the left horizontal fork device support frame. A right horizontal fork device support frame is arranged on the right side of the mother-and-child pallet stacking station, and a right horizontal fork device is arranged at the upper end of the right horizontal fork device support frame. The structure of the left horizontal fork device is exactly the same as that of the right horizontal fork device, and the left horizontal fork device and the right horizontal fork device are symmetrically arranged with the central axis in the conveying direction of the roller conveyor as the axis of symmetry; when the sub-pallet is lifted by the lifting gantry, the left fork on the left horizontal fork device extending to the right is connected to the left side vertical surface of the sub-pallet, and the right fork on the right horizontal fork device extending to the left is connected to the right side vertical surface of the sub-pallet.

[0007] A pair of crank drive shaft brackets of the pallet lifting mechanism are fixedly connected to the top surface of the lifting device mounting frame. A crank drive shaft is arranged on the pair of crank drive shaft brackets. A left crank is fixedly connected to the left end of the crank drive shaft, and a left guide wheel bearing is connected to the outer end of the left crank. A right crank is fixedly connected to the right end of the crank drive shaft, and a right guide wheel bearing is connected to the outer end of the right crank. A left horizontal channel steel is arranged on the left outer side of the left crank. The left horizontal channel steel is arranged horizontally along the conveying direction of the roller conveyor, and the left horizontal channel steel The groove of the right side is set to the right, and the left guide wheel bearing connected to the outer end of the left crank is movably set in the groove of the left horizontal channel steel; on the right outer side of the right crank, a right horizontal channel steel is set, and the right horizontal channel steel is horizontally set along the conveying direction of the roller conveyor, and the groove of the right horizontal channel steel is set to the left, and the right guide wheel bearing connected to the outer end of the right crank is movably set in the groove of the right horizontal channel steel; between the top end surface of the left horizontal channel steel and the top end surface of the right horizontal channel steel, a lifting gantry with a pallet lifting mechanism is fixedly connected.

[0008] Another guide wheel bearing is also arranged in the groove of the left horizontal channel steel, and the other guide wheel bearing is arranged on the outer end of another crank, and the other crank is arranged on the other crank drive shaft, and the other crank drive shaft is arranged on the lifting device mounting frame through another pair of crank drive shaft brackets; a left front sprocket is arranged on the crank drive shaft, a left rear sprocket is arranged on the other crank drive shaft, a lifting device mounting frame is arranged with a lifting drive motor, and a lifting drive chain is arranged between the lifting drive motor, the left rear sprocket and the left front sprocket; a vertical guide wheel bearing support is fixedly connected to the lower bottom surface at the center of the left horizontal channel steel, a vertical guide wheel bearing is arranged on the vertical guide wheel bearing support, a vertical channel steel support is arranged on the lifting device mounting frame, a vertical channel steel is arranged on the vertical channel steel support, and the vertical guide wheel bearing is movably arranged in the vertical groove of the vertical channel steel.

[0009] The left horizontal slider guide rail of the left horizontal fork device is arranged on the upper part of the left horizontal fork device support frame, and the left horizontal slider is movably arranged in the left horizontal slider guide rail, and the left horizontal slider is provided with a left horizontal rack fork, and the left horizontal rack fork is provided with a sub-pallet positioning and centering limit block, and the left horizontal rack fork is meshed with a left gear, and the left gear is arranged on the left horizontal fork device support frame through the left gear support frame, and a rack drive motor is arranged at the lower part of the left horizontal fork device support frame, and a rack drive chain is arranged between the output shaft of the rack drive motor and the left gear.

[0010] A method for stacking a loaded sub-pallet onto a mother pallet, comprising a roller conveyor support, a roller is arranged on the roller conveyor support, a mother pallet limiting guide plate is arranged on both the left and right sides of the roller, a sub-pallet is conveyed on the roller, and goods are wrapped and fixed on the sub-pallet; a mother-child pallet stacking station is arranged on the roller conveyor support, a pallet in-place detection switch is arranged on the roller conveyor support of the mother-child pallet stacking station, and the pallet in-place detection switch is electrically connected to the driving mechanism of the roller; a lifting device mounting frame is arranged directly below the roller on the mother-child pallet stacking station, and a pallet lifting mechanism is arranged on the lifting device mounting frame , the lifting gantry on the pallet lifting mechanism is arranged between two adjacent rollers; a left horizontal fork device support frame is arranged on the left side of the mother-child pallet stacking station, and a left horizontal fork device is arranged at the upper end of the left horizontal fork device support frame, and a right horizontal fork device is arranged on the right side of the mother-child pallet stacking station, and a right horizontal fork device is arranged at the upper end of the right horizontal fork device support frame. The structure of the left horizontal fork device is exactly the same as that of the right horizontal fork device, and the left horizontal fork device and the right horizontal fork device are symmetrically arranged with the central axis in the conveying direction of the roller conveyor as the symmetry axis; it is characterized by the following steps:

[0011] The first step is to lift the lifting gantry on the pallet lifting mechanism directly below the rollers on the mother-child pallet stacking station, and the upper end of the lifting gantry is higher than the rollers; the sub-pallet with goods wrapped and fixed on it, which is transported by the roller conveyor, is blocked at the entrance of the mother-child pallet stacking station by the raised lifting gantry, and the rollers in operation are corrected and aligned in the front and rear directions, so that the front side of the rectangular sub-pallet is perpendicular to the conveying direction;

[0012] Step 2: Control the lifting gantry to drop to a position below the roller, and the sub-pallet continues to move forward and is transported to the sub-pallet stacking station. When the pallet in place detection switch detects the sub-pallet, the switch sends a signal to the control system to control the roller to stop rotating, and the sub-pallet stops at the sub-pallet stacking station.

[0013] Step 3: Control the lifting gantry to lift the sub-pallet away from the roller (to the top of the roller);

[0014] Step 4: Then the lifting switch sends a signal to the control system, so that the fork body on the left horizontal fork device extends to the right, and the fork body on the right horizontal fork device extends to the left, and the two forks are inserted under the sub-pallet to lift the sub-pallet. At the same time, the positioning blocks provided on the two forks center the sub-pallet in the left and right directions, so that the sub-pallet is centered at the center of the mother-child pallet stacking station;

[0015] Step 5: The roller conveyor transports the mother pallet to the entrance of the mother-child pallet stacking station. The mother pallet is blocked and corrected by the raised lifting gantry, so that the front side of the rectangular mother pallet is perpendicular to the conveying direction, so as to realize the alignment of the mother pallet in the conveying direction, and then the roller stops rotating;

[0016] Step 6: Control the lifting gantry to drop below the roller conveying surface. When it is in place, the lifting switch sends a signal to the control system, the roller starts to rotate, and the mother pallet enters the mother-child pallet stacking station under the conveyance of the roller. The mother pallet limit guide plates set on the left and right sides of the roller guide the mother pallet. When the mother pallet is transported to the in-place detection switch, the induction switch sends a stop signal to the roller conveyor, so that the mother pallet is accurately centered on the mother-child pallet stacking station;

[0017] Step 7: Control the lifting gantry to rise, lift the mother pallet, and connect it to the child pallet to separate it from the fork body; then, the control system sends a signal to retract the fork body on the left horizontal fork device to the left, and the fork body on the right horizontal fork device to the right, and the child pallet is naturally transferred to the raised mother pallet to achieve accurate stacking of the mother and child pallets;

[0018] The eighth step is to control the lifting gantry to fall so that the stacked mother-child pallets are transferred to the rollers on the mother-child pallet stacking station. Finally, the control system gives a signal to start the roller conveyor roller to rotate, and the stacked mother-child pallets are transferred to the storage conveyor, and the stacker is used to store them in the warehouse.

[0019] The invention has a simple structure and can be stacked with a mother pallet during transportation of the child pallet, thereby ensuring that the child pallet can be located at the center of the mother pallet during stacking, so that the stacked child and mother pallets and goods can be smoothly placed in the shelf. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure after stacking of the present invention is completed;

[0021] Figure 2 It is a schematic structural diagram of the sub-tray 202 of the present invention before entering the sub-tray stacking station;

[0022] Figure 3 It is a schematic diagram of the structure of the sub-tray 202 of the present invention when entering the sub-tray stacking station;

[0023] Figure 4 is a schematic structural diagram of the sub-tray 202 of the present invention after being lifted by the lifting gantry 310;

[0024] Figure 5 It is a structural schematic diagram of the lifting mechanism of the present invention;

[0025] Figure 6 It is a schematic structural diagram of the left horizontal fork-out device 402 and the right horizontal fork-out device 404 of the present invention after the sub-tray 202 is lifted and before the fork-out device 404 is lifted;

[0026] Figure 7 It is a schematic structural diagram of the left horizontal fork device 402 and the right horizontal fork device 404 after the sub-tray 202 of the present invention is lifted and forked;

[0027] Figure 8 It is a structural schematic diagram of the present invention after the sub-pallet 202 is transferred to the two fork bodies and the lifting gantry 310 falls down;

[0028] Fig. 9 It is a schematic structural diagram of the mother pallet 201 of the present invention after entering the stacking station;

[0029] Fig.10 It is a schematic diagram of the structure of the sub-pallet 202 of the present invention after being transferred to the mother pallet 201 in the lifting position;

[0030] Fig.11 It is a schematic diagram of the structure of the sub-pallet 202 of the present invention after being transferred to the mother pallet 201 in the lifting position in a top view direction;

[0031] Fig.12 It is a structural schematic diagram of the stacked mother-and-child pallets of the present invention falling onto a conveyor;

[0032] Fig.13 It is a structural schematic diagram of the vertical channel steel support 321 of the present invention;

[0033] Fig.14 is a schematic structural diagram of the left horizontal fork device 402 of the present invention;

[0034] Fig.15 It is a schematic diagram of the connection structure between the left horizontal channel steel 308 and the vertical guide wheel bearing support 312 of the present invention;

[0035] Fig.16 It is a schematic structural diagram of the connection structure of the left horizontal channel steel 308 and the vertical guide wheel bearing support 312 of the present invention in the side view direction;

[0036] Fig.17 2 is a schematic diagram of the structure of the sub-pallet 202 after being stacked with the mother pallet of the present invention;

[0037] Fig.18 It is a schematic diagram of the structure of the sub-tray 202 of the present invention after being stacked with the mother tray in a side view direction. DETAILED DESCRIPTION

[0038] The present invention is described in detail below in conjunction with the accompanying drawings:

[0039] A centering stacking device for stacking a sub-pallet with a load onto a mother pallet, comprising a roller conveyor support 101, on which a roller 102 is arranged, on the left and right sides of the roller 102, a mother pallet limiting guide plate 103 is arranged, a sub-pallet 202 is conveyed on the roller 102, and goods 203 are wrapped and fixed on the sub-pallet 202; a mother-child pallet stacking station is arranged on the roller conveyor support 101, a pallet in-place detection switch 104 is arranged on the roller conveyor support 101 of the mother-child pallet stacking station, and the pallet in-place detection switch 104 is electrically connected to the driving mechanism of the roller 102; a lifting device mounting frame 301 is arranged directly below the roller 102 on the mother-child pallet stacking station, a pallet lifting mechanism is arranged on the lifting device mounting frame 301, and a lifting gantry 310 on the pallet lifting mechanism is arranged between two adjacent rollers 102; A left horizontal fork device support frame 401 is arranged on the left side of the mother-child pallet stacking station, and a left horizontal fork device 402 is arranged at the upper end of the left horizontal fork device support frame 401, and a right horizontal fork device support frame 403 is arranged on the right side of the mother-child pallet stacking station, and a right horizontal fork device 404 is arranged at the upper end of the right horizontal fork device support frame 403. The structure of the left horizontal fork device 402 is exactly the same as that of the right horizontal fork device 404, and the left horizontal fork device 402 and the right horizontal fork device 404 are symmetrically arranged with the central axis in the conveying direction of the roller conveyor as the symmetry axis; when the sub-pallet 202 is lifted by the lifting gantry 310, the left fork extending to the right on the left horizontal fork device 402 is connected to the left side vertical surface of the sub-pallet 202, and the right fork extending to the left on the right horizontal fork device 404 is connected to the right side vertical surface of the sub-pallet 202.

[0040] A pair of crank drive shaft brackets 302 of the tray lifting mechanism are fixedly connected to the top surface of the lifting device mounting bracket 301. On the pair of crank drive shaft brackets 302, there is a crank drive shaft 303. A left crank 304 is fixedly connected to the left end of the crank drive shaft 303. A left guide wheel bearing 306 is connected to the outer end of the left crank 304. A right crank 305 is fixedly connected to the right end of the crank drive shaft 303. A right guide wheel bearing 307 is connected to the outer end of the right crank 305. A left horizontal channel steel 308 is arranged on the left outer side of the left crank 304. The left horizontal channel steel 308 is horizontally arranged along the conveying direction of the roller conveyor, and the groove of the left horizontal channel steel 308 faces rightward. The left guide wheel bearing 306 connected to the outer end of the left crank 304 is movably arranged in the groove of the left horizontal channel steel 308. A right horizontal channel steel 309 is arranged on the right outer side of the right crank 305. The right horizontal channel steel 309 is horizontally arranged along the conveying direction of the roller conveyor, and the groove of the right horizontal channel steel 309 faces leftward. The right guide wheel bearing 307 connected to the outer end of the right crank 305 is movably arranged in the groove of the right horizontal channel steel 309. A lifting gantry 310 of the tray lifting mechanism is fixedly connected between the top surface of the left horizontal channel steel 308 and the top surface of the right horizontal channel steel 309. The lifting gantry 310 of the present invention is fixed on the two parallel left horizontal channel steel 308 and right horizontal channel steel 309. A plurality of lifting gantries 310 are fixedly arranged at intervals on the two parallel horizontal channel steels. These lifting gantries 310 lift and abut against the bottom surface of the bottom feet of the U-shaped sub-tray 202, raising or lowering the sub-tray 202. The lifting power is provided by the left crank 304 and the right crank 305.

[0041] Another guide wheel bearing 311 is also arranged in the groove of the left horizontal channel steel 308. The other guide wheel bearing 311 is arranged on the outer end of another crank 314. The other crank 314 is arranged on another crank drive shaft 315. The other crank drive shaft 315 is arranged on the lifting device mounting frame 301 through another pair of crank drive shaft brackets; a left front sprocket 316 is arranged on the crank drive shaft 303, a left rear sprocket 317 is arranged on the other crank drive shaft 315, a lifting device mounting frame 301 is arranged with a lifting drive motor 319, and a lifting drive chain 318 is arranged between the lifting drive motor 319, the left rear sprocket 317 and the left front sprocket 316; a vertical guide wheel bearing support 312 is fixedly connected to the lower bottom surface at the center of the left horizontal channel steel 308, and a vertical guide wheel bearing support 312 is fixedly connected to the vertical guide wheel bearing support 31 2 is provided with a vertical guide wheel bearing 313, a vertical channel steel support 321 is provided on the lifting device mounting frame 301, and a vertical channel steel 320 is provided on the vertical channel steel support 321, and the vertical guide wheel bearing 313 is movably arranged in the vertical groove of the vertical channel steel 320; when the left crank 304 and the right crank 305 swing upward at the same time, the left guide wheel bearing 306 rolls in the left horizontal channel steel 308, and the right guide wheel bearing 307 rolls in the right horizontal channel steel 309, and the rolling of the two pairs of guide wheel bearings symmetrically arranged lifts the left horizontal channel steel 308 and the right horizontal channel steel 309 upward, and when the left horizontal channel steel 308 and the right horizontal channel steel 309 are lifted up and lifted up synchronously, the vertical guide wheel bearing 313 is movably arranged in the vertical groove of the vertical channel steel 320, which plays a limiting role in lifting the two channel steels straightly upward.

[0042] The left horizontal slider guide rail 405 of the left horizontal fork device 402 is arranged on the upper part of the left horizontal fork device support frame 401. In the left horizontal slider guide rail 405, a left horizontal slider 406 is movably arranged. A left horizontal rack fork 407 is arranged on the left horizontal slider 406. A sub-tray positioning and centering limit block 408 is arranged on the left horizontal rack fork 407. A left gear 410 is meshed on the left horizontal rack fork 407. The left gear 410 is arranged on the left horizontal fork device support frame 401 through a left gear support frame 409. A rack drive motor 41 is arranged at the lower part of the left horizontal fork device support frame 401. 2. A rack drive chain 411 is provided between the output shaft of the rack drive motor 412 and the left gear 410; the left horizontal rack fork 407 is inserted into the sub-pallet leg plug-in hole 205 provided on the leg of the sub-pallet 202, and the sub-pallet positioning and centering limit block 408 provided on the left horizontal rack fork 407 and the sub-pallet positioning and centering limit block provided on the right horizontal rack fork jointly realize the centering of the sub-pallet 202 in the conveying direction; in addition, a mother pallet leg plug-in hole 204 is also provided on the mother pallet 201; the present invention is provided with two pairs of horizontal rack forks to jointly complete the centering of the sub-pallet.

[0043] A method for stacking a loaded sub-pallet onto a mother pallet, comprising a roller conveyor support 101, a roller 102 is arranged on the roller conveyor support 101, a mother pallet limiting guide plate 103 is arranged on both the left and right sides of the roller 102, a sub-pallet 202 is conveyed on the roller 102, and goods 203 are wrapped and fixed on the sub-pallet 202; a mother-child pallet stacking station is arranged on the roller conveyor support 101, a pallet in-place detection switch 104 is arranged on the roller conveyor support 101 of the mother-child pallet stacking station, and the pallet in-place detection switch 104 is electrically connected to the driving mechanism of the roller 102; a lifting device mounting frame 301 is arranged directly below the roller 102 on the mother-child pallet stacking station, and a lifting device mounting frame 301 is arranged on the lifting device mounting frame 301 A pallet lifting mechanism is provided, and a lifting gantry 310 on the pallet lifting mechanism is arranged between two adjacent rollers 102; a left horizontal fork device support frame 401 is arranged on the left side of the mother-child pallet stacking station, and a left horizontal fork device 402 is arranged at the upper end of the left horizontal fork device support frame 401; a right horizontal fork device support frame 403 is arranged on the right side of the mother-child pallet stacking station, and a right horizontal fork device 404 is arranged at the upper end of the right horizontal fork device support frame 403; the structure of the left horizontal fork device 402 is exactly the same as that of the right horizontal fork device 404, and the left horizontal fork device 402 and the right horizontal fork device 404 are symmetrically arranged with the central axis in the conveying direction of the roller conveyor as the symmetry axis; it is characterized by the following steps:

[0044] The first step is to lift the lifting gantry 310 on the pallet lifting mechanism directly below the roller 102 on the mother-child pallet stacking station, and the upper end of the lifting gantry 310 is higher than the roller 102; the sub-pallet 202 with the goods 203 wrapped and fixed thereon, which is transported by the roller conveyor, is blocked at the entrance of the mother-child pallet stacking station by the raised lifting gantry 310, and the rollers in operation are corrected and aligned in the front and rear directions, so that the front side of the rectangular sub-pallet 202 is perpendicular to the conveying direction;

[0045] Step 2: Control the lifting gantry 310 to drop to a position below the roller 102, and the sub-pallet 202 continues to move forward and is transported to the sub-pallet stacking station. When the pallet in place detection switch 104 detects the sub-pallet 202, the switch sends a signal to the control system to control the roller 102 to stop rotating, and the sub-pallet 202 stops at the sub-pallet stacking station.

[0046] Step 3: Control the lifting gantry 310 to lift, and the lifting gantry 310 lifts the sub-tray 202 away from the roller 102 and lifts it to the top of the roller 102;

[0047] Step 4: The lifting switch then sends a signal to the control system, causing the fork on the left horizontal fork device 402 to extend to the right, and the fork on the right horizontal fork device 404 to extend to the left, and the two forks are inserted under the sub-pallet 202 to lift the sub-pallet 202. At the same time, the positioning blocks provided on the two forks center the sub-pallet 202 in the left and right directions, so that the sub-pallet 202 is centered at the center of the mother-child pallet stacking station;

[0048] Step 5: The roller conveyor conveys the mother pallet 201 to the entrance of the mother-child pallet stacking station. The mother pallet 201 is blocked and corrected by the raised lifting gantry 310, so that the front side of the rectangular mother pallet 201 is perpendicular to the conveying direction, so that the mother pallet 201 is aligned in the conveying direction, and then the roller stops rotating;

[0049] Step 6: Control the lifting gantry 310 to drop below the roller conveying surface. After it is in place, the lifting switch sends a signal to the control system, the roller starts to rotate, and the mother pallet 201 enters the mother-child pallet stacking station under the conveyance of the roller 102. The mother pallet limit guide plates 103 set on the left and right sides of the roller 102 are used to position and guide the mother pallet 201. When the mother pallet is transported to the in-place detection switch, the induction switch gives a stop signal to the roller conveyor, so that the mother pallet 201 is accurately centered on the mother-child pallet stacking station;

[0050] Step 7: Control the lifting gantry 310 to rise, and the lifting gantry 310 lifts the mother pallet 201 and connects it to the child pallet 202 to separate it from the fork body; then, the control system sends a signal to retract the fork body on the left horizontal fork device 402 to the left, and the fork body on the right horizontal fork device 404 to the right, and the child pallet 202 is naturally transferred to the raised mother pallet 201, so as to achieve accurate stacking of the mother and child pallets;

[0051] Step 8. Control the lifting gantry 310 to fall so that the stacked mother-and-child pallets are transferred to the roller 102 on the mother-and-child pallet stacking station. Finally, the control system gives a signal to start the roller conveyor roller 102 to rotate, and the stacked mother-and-child pallets are transferred to the storage conveyor, and the stacker realizes storage to the shelf.

Claims

1. A method for stacking a loaded sub-pallet onto a mother pallet, comprising a roller conveyor support (101), a roller (102) being arranged on the roller conveyor support (101), a mother pallet limiting guide plate (103) being arranged on both the left and right sides of the roller (102), a sub-pallet (202) being conveyed on the roller (102), and goods (203) being wrapped and fixed on the sub-pallet (202); a mother-child pallet stacking station being arranged on the roller conveyor support (101), a pallet in-place detection switch (104) being arranged on the roller conveyor support (101) of the mother-child pallet stacking station, and the pallet in-place detection switch (104) being electrically connected to a driving mechanism of the roller (102); a lifting device mounting frame (301) being arranged directly below the roller (102) at the mother-child pallet stacking station, and a lifting device mounting frame (301) being arranged on the lifting device mounting frame (301) A pallet lifting mechanism is arranged on the frame (301), and a lifting gantry (310) on the pallet lifting mechanism is arranged between two adjacent rollers (102); a left horizontal fork device support frame (401) is arranged on the left side of the mother-child pallet stacking station, and a left horizontal fork device (402) is arranged at the upper end of the left horizontal fork device support frame (401); a right horizontal fork device support frame (403) is arranged on the right side of the mother-child pallet stacking station, and a right horizontal fork device (404) is arranged at the upper end of the right horizontal fork device support frame (403); the structure of the left horizontal fork device (402) is completely the same as that of the right horizontal fork device (404), and the left horizontal fork device (402) and the right horizontal fork device (404) are symmetrically arranged with the central axis in the conveying direction of the roller conveyor as the symmetry axis; it is characterized in that Follow these steps: The first step is to lift a lifting gantry (310) on a pallet lifting mechanism disposed directly below the roller (102) on the mother-child pallet stacking station, with the upper end of the lifting gantry (310) being higher than the roller (102); a sub-pallet (202) on which goods (203) are wrapped and fixed and transported by a roller conveyor is blocked at the entrance of the mother-child pallet stacking station by the raised lifting gantry (310), and the rollers in operation are corrected and aligned in the front-rear direction, so that the front side of the rectangular sub-pallet (202) is disposed perpendicular to the transport direction; Step 2: Control the lifting gantry (310) to drop to a position below the roller (102), and the sub-pallet (202) continues to move forward and is conveyed to the sub-pallet stacking station. When the pallet arrival detection switch (104) detects the sub-pallet (202), the switch sends a signal to the control system to control the roller (102) to stop rotating, and the sub-pallet (202) stops at the sub-pallet stacking station. Step 3: Control the lifting gantry (310) to lift, so that the lifting gantry (310) lifts the sub-tray (202) away from the roller (102) and lifts it to the top of the roller (102); Step 4: The lifting switch then sends a signal to the control system, causing the fork body on the left horizontal fork device (402) to extend to the right, and the fork body on the right horizontal fork device (404) to extend to the left, and the two forks are inserted under the sub-pallet (202) to lift the sub-pallet (202). At the same time, the positioning blocks provided on the two forks center the sub-pallet (202) in the left-right direction, so that the sub-pallet (202) is centered at the center of the mother-child pallet stacking station; Step 5: The roller conveyor conveys the mother pallet (201) to the entrance of the mother-child pallet stacking station, and the mother pallet (201) is blocked and corrected by the raised lifting gantry (310), so that the front side of the rectangular mother pallet (201) is perpendicular to the conveying direction, so that the mother pallet (201) is aligned in the conveying direction, and then the roller stops rotating; Step 6: Control the lifting gantry (310) to drop below the roller conveying surface. After it is in place, the lifting switch sends a signal to the control system, the roller starts to rotate, and the mother pallet (201) enters the mother-child pallet stacking station under the transmission of the roller (102); the mother pallet limit guide plates (103) arranged on the left and right sides of the roller (102) position and guide the mother pallet (201). When the mother pallet is transported to the pallet in place detection switch, the induction switch sends a stop signal to the roller conveyor, so that the mother pallet (201) is accurately centered on the mother-child pallet stacking station; Step 7: Control the lifting gantry (310) to rise, and the lifting gantry (310) lifts the mother pallet (201) and connects it to the child pallet (202) to separate it from the fork body; then, the control system sends a signal to retract the fork body on the left horizontal fork device (402) to the left, and retract the fork body on the right horizontal fork device (404) to the right, so that the child pallet (202) is naturally transferred to the raised mother pallet (201), thereby realizing accurate stacking of the mother and child pallets; Step 8: Control the lifting gantry (310) to fall down, so that the stacked mother-and-child pallets are transferred to the rollers (102) on the mother-and-child pallet stacking station. Finally, the control system gives a signal to start the roller conveyor rollers (102) to rotate, and the stacked mother-and-child pallets are transferred to the storage conveyor, and the stacker is put into storage on the shelf. A pair of crank drive shaft brackets (302) of the pallet lifting mechanism are fixedly connected to the top surface of the lifting device mounting frame (301); a crank drive shaft (303) is arranged on the pair of crank drive shaft brackets (302); a left crank (304) is fixedly connected to the left end of the crank drive shaft (303); a left guide wheel bearing (306) is connected to the outer end of the left crank (304); a right crank (305) is fixedly connected to the right end of the crank drive shaft (303); and a right guide wheel bearing (307) is connected to the outer end of the right crank (305); a left horizontal channel steel (308) is arranged on the left outer side of the left crank (304); the left horizontal channel steel (308) is arranged horizontally along the conveying direction of the roller conveyor, and ... The groove of the flat channel steel (308) is arranged to face rightward, and the left guide wheel bearing (306) connected to the outer end of the left crank (304) is movably arranged in the groove of the left horizontal channel steel (308); a right horizontal channel steel (309) is arranged on the right outer side of the right crank (305), and the right horizontal channel steel (309) is arranged horizontally along the conveying direction of the roller conveyor, and the groove of the right horizontal channel steel (309) is arranged to face leftward, and the right guide wheel bearing (307) connected to the outer end of the right crank (305) is movably arranged in the groove of the right horizontal channel steel (309); between the top end surface of the left horizontal channel steel (308) and the top end surface of the right horizontal channel steel (309), a lifting gantry (310) of the pallet lifting mechanism is fixedly connected.

2. A method for stacking loaded sub-pallets onto a mother pallet according to claim 1, characterized in that: Another guide wheel bearing (311) is also arranged in the groove of the left horizontal channel steel (308). The other guide wheel bearing (311) is arranged on the outer side end of another crank (314). The other crank (314) is arranged on another crank drive shaft (315). The other crank drive shaft (315) is arranged on the lifting device mounting frame (301) through another pair of crank drive shaft brackets. A left front sprocket (316) is arranged on the crank drive shaft (303), a left rear sprocket (317) is arranged on the other crank drive shaft (315), and a lifting drive motor is arranged on the lifting device mounting frame (301). (319), a lifting drive chain (318) is arranged between the lifting drive motor (319), the left rear sprocket (317) and the left front sprocket (316); a vertical guide wheel bearing support (312) is fixedly connected to the lower bottom surface at the center of the left horizontal channel steel (308), a vertical guide wheel bearing (313) is arranged on the vertical guide wheel bearing support (312), a vertical channel steel support (321) is arranged on the lifting device mounting frame (301), a vertical channel steel (320) is arranged on the vertical channel steel support (321), and the vertical guide wheel bearing (313) is movably arranged in the vertical groove of the vertical channel steel (320).

3. A method for stacking loaded sub-pallets onto a mother pallet according to claim 2, characterized in that: The left horizontal slider guide rail (405) of the left horizontal fork device (402) is arranged on the upper part of the left horizontal fork device support frame (401); a left horizontal slider (406) is movably arranged in the left horizontal slider guide rail (405); a left horizontal rack fork (407) is arranged on the left horizontal slider (406); a sub-tray positioning and centering limit block (408) is arranged on the left horizontal rack fork (407); a left gear (410) is meshed on the left horizontal rack fork (407); the left gear (410) is arranged on the left horizontal fork device support frame (401) through a left gear support frame (409); a rack drive motor (412) is arranged on the lower part of the left horizontal fork device support frame (401); and a rack drive chain (411) is arranged between the output shaft of the rack drive motor (412) and the left gear (410).

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