Tray stacking mechanism on low-elevation conveying line

Abstract

The utility model discloses a tray stacking mechanism on a low-elevation conveying line. The tray stacking mechanism solves the problem of how to design a low-elevation stacking station suitable for a low-conveying-surface conveying line. The conveyor (2) penetrates through the box type portal frame (1), trays are conveyed on the conveyor (2), and a tray stacking station is arranged at the intersection of the box type portal frame (1) and the conveyor (2). A left lifting frame (16) is movably arranged on two stand columns of a left side door-shaped frame of the box type portal frame (1) on the left side of the tray stacking station; a right lifting frame (19) is movably arranged on two stand columns of a right side door-shaped frame of the box type portal frame on the right side of the tray stacking station; a synchronous lifting mechanism is arranged at the top end of the box type portal frame, and the left lifting frame is connected with the synchronous lifting mechanism through a left lifting chain (15); the inner side end of the telescopic shifting fork plate on the left side and the inner side end of the telescopic shifting fork plate on the right side are matched with trays on the tray stacking station.

Description

Technical Field

[0001] The present invention relates to a pallet stacking device on a logistics conveyor line, in particular to a pallet stacking mechanism on a conveyor line with a lower elevation which is arranged on an automatic conveyor line with a lower elevation. Background Art

[0002] A pallet stacking mechanism is generally provided on a modern material conveyor line. It is provided on the pallet stacking link station of the automatic conveyor line. Its working principle is: after the pallet is conveyed to the stacking station, a lifting mechanism is provided just below the conveyor line station. The lifting mechanism lifts the pallet to a certain height to separate the pallet from the conveyor line. A fork mechanism is provided on both sides of the stacking station. When the pallet is lifted, the fork rotates to the bottom of the pallet. Then, the lifting mechanism falls to its original position and the pallet is transferred to the two forks. At this time, the second pallet on the conveyor line is conveyed to the stacking station. The lifting mechanism rises for the second time and lifts the second pallet so that the second pallet is stacked together with the first pallet. The two forks rotate to both sides and leave the pallet lifting space. The lifting mechanism continues to lift the second pallet upward. After the bottom of the plate is higher than the two forks, the two forks rotate again to the bottom of the second pallet, and the lifting mechanism descends for the third time, so that the two pallets stacked together are transferred to the two forks, and this cycle is repeated to complete the pallet stacking. The lifting mechanism of this pallet stacking device generally uses a motor to drive a crank mechanism to achieve lifting. The motor and crank mechanism need to occupy a large space height, resulting in the design height of the unstacking station generally being around 700 mm. However, with the popularization of automatic conveyor lines in logistics systems, the elevation of the stacking station of some lower-elevation conveyor lines needs to be controlled at around 300 mm, resulting in the elevation of traditional stacking mechanisms unable to meet the requirements of such low-conveying-surface conveyor lines. How to design a stacking mechanism suitable for low elevations has become a problem that needs to be solved in production. Summary of the Invention

[0003] The present invention provides a pallet stacking mechanism on a conveyor line with a relatively low elevation, which solves the technical problem of how to design a pallet stacking station with a relatively low elevation suitable for a conveyor line with a low conveying surface.

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

[0005] A pallet stacking mechanism on a conveyor line with a lower elevation comprises a box-type gantry, a conveyor and a pallet, the conveyor passes through the box-type gantry, and pallets are transported on the conveyor, and a pallet stacking station is provided at the intersection of the box-type gantry and the conveyor; on the two upright columns of the left door-shaped frame of the box-type gantry on the left side of the pallet stacking station, left lifting frame vertical guide rails are provided in parallel to each other, and a left lifting frame is movably provided on the left lifting frame vertical guide rail; on the two upright columns of the right door-shaped frame of the box-type gantry on the right side of the pallet stacking station, right lifting frame vertical guide rails are provided in parallel to each other, and a right lifting frame is movably provided on the right lifting frame vertical guide rail; a synchronous lifting mechanism is provided at the top of the box-type gantry, and the left lifting frame is connected to the pallet stacking station through a left lifting chain. The synchronous lifting mechanisms are connected together, and the right lifting frame is connected to the synchronous lifting mechanism through the right lifting chain; the left lifting frame and the right lifting frame are both provided with fork telescopic plate mechanisms with the same structure, and a pair of guide rail pairs of the left fork telescopic plate mechanism are fixedly suspended on the lower bottom surface of the left lifting frame, and a telescopic fork plate is suspended on the movable slide of a pair of guide rail pairs, and a long hole is provided in the middle of the telescopic fork plate, and a roller is movably provided in the long hole, and the top end of the roller axle is connected with an L-shaped rocker arm, and the L-shaped rocker arm is connected to the output shaft of the telescopic fork plate drive motor, and the telescopic fork plate drive motor is provided in the left lifting frame; the inner end of the telescopic fork plate on the left and the inner end of the telescopic fork plate on the right are movably cooperated with the pallet on the pallet stacking station.

[0006] The synchronous lifting shaft of the synchronous lifting mechanism is horizontally arranged between the left bearing seat and the right bearing seat on the top surface of the box-type gantry, a left lifting sprocket is arranged at the left end of the synchronous lifting shaft, a left lifting chain is connected to the left lifting sprocket, the other end of the left lifting chain is connected to the top of the left lifting frame, a right lifting sprocket is arranged at the right end of the synchronous lifting shaft, a right lifting chain is connected to the right lifting sprocket, and the other end of the right lifting chain is connected to the top of the right lifting frame; a synchronous lifting shaft drive sprocket is arranged on the synchronous lifting shaft, a synchronous drive motor is arranged on the top surface of the box-type gantry in front of the synchronous lifting shaft drive sprocket, a motor output sprocket is arranged on the output shaft of the synchronous drive motor, and an annular drive chain is arranged between the motor output sprocket and the synchronous lifting shaft drive sprocket.

[0007] Guide rail sliders are provided on the outer sides of the two upright columns of the left lifting frame, and the left lifting frame is movably matched with the left lifting frame vertical guide rail through the guide rail sliders.

[0008] A working method of a pallet stacking mechanism on a conveyor line with a lower elevation is carried out through the pallet stacking mechanism, which includes a box-type gantry, a conveyor and a pallet, the conveyor passing through the box-type gantry, on which pallets are transported, and a pallet stacking station is provided at the intersection of the box-type gantry and the conveyor; left lifting frame vertical guide rails are provided in parallel to each other on the two upright columns of the left door-shaped frame of the box-type gantry on the left side of the pallet stacking station, and a left lifting frame is movably provided on the left lifting frame vertical guide rail; right lifting frame vertical guide rails are provided in parallel to each other on the two upright columns of the right door-shaped frame of the box-type gantry on the right side of the pallet stacking station, and a right lifting frame is movably provided on the right lifting frame vertical guide rail; a synchronous lifting mechanism is provided on the top of the box-type gantry, and the left lifting frame is moved by The left lifting chain is connected to the synchronous lifting mechanism, and the right lifting frame is connected to the synchronous lifting mechanism through the right lifting chain; a fork telescopic plate mechanism of the same structure is provided on both the left and right lifting frames, a pair of guide rail pairs of the left fork telescopic plate mechanism is fixedly suspended on the lower bottom surface of the left lifting frame, a telescopic fork plate is suspended on the movable slide of the pair of guide rail pairs, a long hole is provided in the middle of the telescopic fork plate, a roller is movably provided in the long hole, the top end of the roller axle is connected to an L-shaped rocker, the L-shaped rocker is connected to the output shaft of the telescopic fork plate drive motor, and the telescopic fork plate drive motor is provided in the left lifting frame; the inner end of the telescopic fork plate on the left and the inner end of the telescopic fork plate on the right are movably matched with the pallet on the pallet stacking station; it is characterized by the following steps:

[0009] Step 1: After the first pallet is transferred to the pallet stacking station, the telescopic fork plate drive motor in the left lifting frame is started. The telescopic fork plate drive motor extends the telescopic fork plate to the right to the bottom end of the first pallet through the L-shaped rocker and roller. At the same time, the telescopic fork plate drive motor in the right lifting frame is started synchronously. The telescopic fork plate on it extends to the left to the bottom end of the first pallet through the L-shaped rocker and roller.

[0010] The second step is to start the synchronous lifting mechanism, which uses the left lifting chain and the right lifting chain to synchronously lift the left lifting frame and the right lifting frame to separate them from the conveyor;

[0011] In the third step, the conveyor transports the second pallet to the pallet stacking station. The synchronous lifting mechanism uses the left lifting chain and the right lifting chain to synchronously lower the left lifting frame and the right lifting frame, so that the first pallet is stacked on the second pallet. Then, the telescopic fork plate drive motor in the left lifting frame and the telescopic fork plate drive motor in the right lifting frame are synchronously started to retract the telescopic fork plate.

[0012] Step 4: Start the synchronous lifting mechanism. The synchronous lifting mechanism uses the left lifting chain and the right lifting chain to synchronously drop the left lifting frame and the right lifting frame, so that the two telescopic fork plates fall below the second pallet;

[0013] Step 5: Start the telescopic fork plate drive motor in the left lifting frame and the telescopic fork plate drive motor in the right lifting frame to extend the two telescopic fork plates to the lower end of the second pallet;

[0014] Step 6: Start the synchronous lifting mechanism. The synchronous lifting mechanism lifts the left lifting frame and the right lifting frame synchronously through the left lifting chain and the right lifting chain, so that the second pallet stacked together is separated from the conveyor;

[0015] Step 7. After the conveyor delivers the third pallet to the pallet stacking station, repeat steps 3 to 6, first stacking the first pallet, the second pallet, and the third pallet together, and then lift the three stacked pallets to remove them from the conveyor; repeat this cycle to complete the pallet stacking of a group of pallets delivered by the conveyor.

[0016] The present invention combines the pallet lifting and fork mechanisms on the pallet stacking station into one, thereby removing the pallet lifting mechanism to the outside of the conveyor line, thereby overcoming the requirements for the elevation of the pallet stacking station and realizing pallet stacking operations on a conveyor line with a lower elevation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the present invention in the main viewing direction;

[0018] Figure 2 It is a schematic structural diagram of the present invention when viewed from the left;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the box-type gantry 1 of the present invention;

[0020] Figure 4 It is a structural diagram of the left lifting frame 16 of the present invention. DETAILED DESCRIPTION

[0021] The present invention is described in detail below with reference to the accompanying drawings:

[0022] A pallet stacking mechanism on a conveyor line with a low elevation comprises a box-type gantry 1, a conveyor 2 and a pallet. The box-type gantry 1 is in the shape of a rectangular box frame. The conveyor 2 passes through the box-type gantry 1. Pallets are transported on the conveyor 2. A pallet stacking station is provided at the intersection of the box-type gantry 1 and the conveyor 2. The pallets transported from the conveyor 2 are stacked at the pallet stacking station. On the two upright columns of the left door-shaped frame of the box-type gantry 1 on the left side of the pallet stacking station, two pallet stacking stations are provided in parallel with each other. A left lifting frame vertical guide rail 17 is provided, and a left lifting frame 16 is movably provided on the left lifting frame vertical guide rail 17. The left lifting frame 16 realizes vertical lifting along the left lifting frame vertical guide rail 17; on the two upright columns of the right door-shaped frame of the box-type gantry 1 on the right side of the pallet stacking station, right lifting frame vertical guide rails 20 are provided in parallel with each other, and a right lifting frame 19 is movably provided on the right lifting frame vertical guide rail 20; a synchronous lifting mechanism is provided at the top of the box-type gantry 1, and the left lifting frame 1 6 is connected to the synchronous lifting mechanism through the left lifting chain 15, and the right lifting frame 19 is connected to the synchronous lifting mechanism through the right lifting chain 18; the left lifting frame 16 and the right lifting frame 19 are both provided with a fork telescopic plate mechanism of the same structure, a pair of guide rail pairs 22 of the left fork telescopic plate mechanism are fixedly suspended on the lower bottom surface of the left lifting frame 16, a telescopic fork plate 23 is suspended on the movable slide of the pair of guide rail pairs 22, and a long strip hole 24 is provided in the middle of the telescopic fork plate 23 A roller 27 is movably provided in the long hole 24, and the top end of the wheel axle 26 of the roller 27 is connected to an L-shaped rocker arm 25, and the L-shaped rocker arm 25 is connected to the output shaft of the telescopic fork plate drive motor, and the telescopic fork plate drive motor is provided in the left lifting frame 16; the inner end of the telescopic fork plate on the left and the inner end of the telescopic fork plate on the right are movably matched with the pallet on the pallet stacking station, and the extended telescopic fork plate on the left and the extended telescopic fork plate on the right enter the pallet to lift the pallet.

[0023] The synchronous lifting shaft 7 of the synchronous lifting mechanism is horizontally arranged between the left bearing seat 8 and the right bearing seat 9 on the top surface of the box-type gantry 1. A left lifting sprocket 13 is arranged at the left end of the synchronous lifting shaft 7. A left lifting chain 15 is connected to the left lifting sprocket 13. The other end of the left lifting chain 15 is connected to the top of the left lifting frame 16. A right lifting sprocket 14 is arranged at the right end of the synchronous lifting shaft 7. A right lifting chain 18 is connected to the right lifting sprocket 14. The other end of the right lifting chain 18 is connected to the top of the right lifting frame 19. There is a synchronous lifting shaft drive sprocket 10, a synchronous drive motor 6 is arranged on the top surface of the box-type gantry 1 in front of the synchronous lifting shaft drive sprocket 10, a motor output sprocket 11 is arranged on the output shaft of the synchronous drive motor 6, and an annular drive chain 12 is arranged between the motor output sprocket 11 and the synchronous lifting shaft drive sprocket 10; the synchronous drive motor 6 drives the synchronous lifting shaft 7 to rotate, thereby realizing the synchronous lifting of the left lifting frame 16 and the right lifting frame 19, thereby realizing the lifting of the pallet on the extended left telescopic fork plate and the extended right telescopic fork plate.

[0024] Guide rail sliders 21 are provided on the outer sides of the two upright columns of the left lifting frame 16 , and the left lifting frame 16 is movably matched with the left lifting frame vertical guide rail 17 through the guide rail sliders 21 .

[0025] A working method of a pallet stacking mechanism on a conveyor line with a lower elevation is carried out through a pallet stacking mechanism, the pallet stacking mechanism comprising a box-type gantry 1, a conveyor 2 and a pallet, the conveyor 2 passing through the box-type gantry 1, on which a pallet is transported, and a pallet stacking station is provided at the intersection of the box-type gantry 1 and the conveyor 2; on the two upright columns of the left side gate-shaped frame of the box-type gantry 1 on the left side of the pallet stacking station, left lifting frame vertical guide rails 17 are provided in parallel with each other, and a left lifting frame 16 is movably provided on the left lifting frame vertical guide rail 17; on the two upright columns of the right side gate-shaped frame of the box-type gantry 1 on the right side of the pallet stacking station, right lifting frame vertical guide rails 20 are provided in parallel with each other, and a right lifting frame 19 is movably provided on the right lifting frame vertical guide rail 20; a synchronous lifting mechanism is provided at the top of the box-type gantry 1, and the left lifting frame 16 is moved by the left lifting chain 1 5 is connected to the synchronous lifting mechanism, and the right lifting frame 19 is connected to the synchronous lifting mechanism through the right lifting chain 18; a fork telescopic plate mechanism of the same structure is provided on the left lifting frame 16 and the right lifting frame 19, a pair of guide rail pairs 22 of the left fork telescopic plate mechanism is fixedly suspended on the lower bottom surface of the left lifting frame 16, and a telescopic fork plate 23 is suspended on the movable slide of the pair of guide rail pairs 22, and a long hole 24 is provided in the middle of the telescopic fork plate 23, and a roller 27 is movably provided in the long hole 24, and the top end of the wheel axle 26 of the roller 27 is connected to the L-shaped rocker 25, and the L-shaped rocker 25 is connected to the output shaft of the telescopic fork plate drive motor, and the telescopic fork plate drive motor is provided in the left lifting frame 16; the inner end of the telescopic fork plate on the left and the inner end of the telescopic fork plate on the right are movably matched with the pallet on the pallet stacking station; it is characterized by the following steps:

[0026] In the first step, after the first pallet 3 is transferred to the pallet stacking station, the telescopic fork plate drive motor in the left lifting frame 16 is started. The telescopic fork plate drive motor extends the telescopic fork plate 23 to the right to the bottom end of the first pallet 3 through the L-shaped rocker 25 and the roller 27. At the same time, the telescopic fork plate drive motor in the right lifting frame 19 is started synchronously. The telescopic fork plate on it extends to the left to the bottom end of the first pallet 3 through the L-shaped rocker and roller thereon.

[0027] Step 2: Start the synchronous lifting mechanism, which uses the left lifting chain 15 and the right lifting chain 18 to synchronously lift the left lifting frame 16 and the right lifting frame 19 to separate them from the conveyor 2;

[0028] In the third step, the conveyor 2 transfers the second pallet 4 to the pallet stacking station. The synchronous lifting mechanism uses the left lifting chain 15 and the right lifting chain 18 to synchronously lower the left lifting frame 16 and the right lifting frame 19, so that the first pallet 3 is stacked on the second pallet 4. Then, the telescopic fork plate drive motor in the left lifting frame 16 and the telescopic fork plate drive motor in the right lifting frame 19 are synchronously started to retract the telescopic fork plate.

[0029] Step 4: Start the synchronous lifting mechanism. The synchronous lifting mechanism uses the left lifting chain 15 and the right lifting chain 18 to synchronously lower the left lifting frame 16 and the right lifting frame 19, so that the two telescopic fork plates fall below the second pallet 4.

[0030] Step 5: Start the telescopic fork plate drive motor in the left lifting frame 16 and the telescopic fork plate drive motor in the right lifting frame 19 to extend the two telescopic fork plates to the lower end of the second pallet 4;

[0031] Step 6: Start the synchronous lifting mechanism. The synchronous lifting mechanism uses the left lifting chain 15 and the right lifting chain 18 to synchronously lift the left lifting frame 16 and the right lifting frame 19, so that the second pallet 4 stacked together is separated from the conveyor 2;

[0032] Step 7. After the conveyor 2 transfers the third pallet 5 to the pallet stacking station, repeat steps 3 to 6, first stacking the first pallet 3, the second pallet 4 and the third pallet 5 together, and then lift the three stacked pallets to remove them from the conveyor 2; repeat this cycle to achieve the palletizing of a group of pallets transported by the conveyor 2.

Claims

1. A pallet stacking mechanism on a conveyor line at a relatively low elevation, comprising a box-type gantry (1), a conveyor (2) and a pallet, wherein the conveyor (2) passes through the box-type gantry (1), the pallet is transported on the conveyor (2), and a pallet stacking station is provided at the intersection of the box-type gantry (1) and the conveyor (2); characterized in that: On the two upright columns of the left door-shaped frame of the box-type gantry (1) on the left side of the pallet stacking station, left lifting frame vertical guide rails (17) are provided in parallel with each other, and a left lifting frame (16) is movably provided on the left lifting frame vertical guide rail (17); on the two upright columns of the right door-shaped frame of the box-type gantry (1) on the right side of the pallet stacking station, right lifting frame vertical guide rails (20) are provided in parallel with each other, and a right lifting frame (19) is movably provided on the right lifting frame vertical guide rail (20); a synchronous lifting mechanism is provided at the top of the box-type gantry (1), the left lifting frame (16) is connected to the synchronous lifting mechanism through the left lifting chain (15), and the right lifting frame (19) is connected to the synchronous lifting mechanism through the right lifting chain (18); on the left lifting frame (16) ) and the right lifting frame (19) are provided with a fork telescopic plate mechanism of the same structure, a pair of guide rail pairs (22) of the left fork telescopic plate mechanism are fixedly suspended on the lower bottom surface of the left lifting frame (16), a telescopic fork plate (23) is suspended on the movable slide of the pair of guide rail pairs (22), a long hole (24) is provided in the middle of the telescopic fork plate (23), a roller (27) is movably provided in the long hole (24), the top end of the wheel shaft (26) of the roller (27) is connected to an L-shaped rocker (25), the L-shaped rocker (25) is connected to the output shaft of the telescopic fork plate drive motor, and the telescopic fork plate drive motor is provided in the left lifting frame (16); the inner side end of the telescopic fork plate on the left and the inner side end of the telescopic fork plate on the right are movably matched with the pallet on the pallet stacking station.

2. The pallet stacking mechanism on a conveyor line with a lower elevation according to claim 1, characterized in that: The synchronous lifting shaft (7) of the synchronous lifting mechanism is horizontally arranged between the left bearing seat (8) and the right bearing seat (9) on the top surface of the box-type gantry (1), a left lifting sprocket (13) is arranged at the left end of the synchronous lifting shaft (7), a left lifting chain (15) is connected to the left lifting sprocket (13), the other end of the left lifting chain (15) is connected to the top of the left lifting frame (16), a right lifting sprocket (14) is arranged at the right end of the synchronous lifting shaft (7), and a right lifting chain is connected to the right lifting sprocket (14). The right lifting chain (18) is connected to the top of the right lifting frame (19); a synchronous lifting shaft driving sprocket (10) is provided on the synchronous lifting shaft (7); a synchronous driving motor (6) is provided on the top surface of the box-type gantry (1) in front of the synchronous lifting shaft driving sprocket (10); a motor output sprocket (11) is provided on the output shaft of the synchronous driving motor (6); and an annular driving chain (12) is provided between the motor output sprocket (11) and the synchronous lifting shaft driving sprocket (10).

3. A pallet stacking mechanism on a conveyor line at a lower elevation according to claim 1 or 2, characterized in that: Guide rail sliders (21) are provided on the outer sides of the two upright columns of the left lifting frame (16), and the left lifting frame (16) is movably matched with the left lifting frame vertical guide rail (17) through the guide rail sliders (21).

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