A conveying line limiting stop device and a method for transporting goods pallets in and out of a warehouse

Abstract

The application discloses a conveying line limiting stop device and a goods pallet in-and-out warehouse carrying method, which comprises a stereoscopic goods shelf, a conveying mechanism, a shuttle vehicle and a longitudinal and transverse intersecting running track, the stereoscopic goods shelf and the conveying mechanism are above the running track, the shuttle vehicle is movably running on the running track and shuttles below the stereoscopic goods shelf and the conveying mechanism, the conveying mechanism is provided with the limiting stop device at one end close to the stereoscopic warehouse, when the pallet is placed on the conveying surface, if the conveying mechanism is conveying in a forward direction to carry in the warehouse, the limiting stop device is in limiting contact with the pallet bearing the goods, if the conveying belt is conveying in a reverse direction to carry in the warehouse, the pallet will press the limiting stop device downward to below the conveying surface, the pallet bearing the goods with different weights or the pallets with different materials can be accurately stopped at the same position each time, the risk of goods falling in the carrying process of the shuttle vehicle is greatly reduced, and the device can be applied to most scenes of pallet goods docking through the conveying line.

Description

Technical Field

[0001] This invention belongs to the field of intelligent automated warehousing, and more specifically, it is a conveyor line limit stop device and a method for handling pallets entering and leaving the warehouse. Background Technology

[0002] In an intelligent automated storage and retrieval system composed of conveyor lines and automated warehouses, the process of goods entering and leaving the warehouse is generally controlled by the signals of photoelectric sensors. However, when the weight or material of the palletized goods is inconsistent, the stopping position of the pallet on the transport line will be deviated. As a result, when the shuttle enters the conveyor line to pick up goods, the lifting platform of the shuttle cannot be directly under the palletized goods, increasing the risk of goods falling during the handling process. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a conveyor line limit stop device and a pallet handling method for entering and leaving the warehouse. It can ensure that pallets carrying goods of different weights or of different materials can be accurately stopped at the same position each time, which can significantly reduce the risk of goods falling during shuttle handling. It can be applied to most scenarios of palletized goods docking through the conveyor line and has a wide range of applications.

[0004] Technical Solution: To achieve the above objectives, the present invention provides a conveyor line limit stop device and a pallet handling method for inbound and outbound operations, comprising a three-dimensional rack, a conveyor mechanism, a shuttle, and crisscrossing travel tracks. The three-dimensional rack and the conveyor mechanism are located above the travel tracks, and the shuttle travels on the travel tracks, moving below the three-dimensional rack and the conveyor mechanism. A limit stop device is provided on one end of the conveyor mechanism near the three-dimensional warehouse. When a pallet is placed on the conveyor surface, if the conveyor mechanism is conveying goods in the forward direction for inbound operations, the limit stop device makes contact with the pallet carrying the goods. If the conveyor belt is conveying goods out of the warehouse in the reverse direction, the pallet presses the limit stop device down below the conveyor surface.

[0005] Furthermore, the conveying mechanism includes two sets of conveyor frames arranged side by side on both sides of the travel track. Both sets of conveyor frames are equipped with conveyor belts that can be driven in both directions along the length direction. A limit stop device is provided on the side of either set of conveyor frames that is close to each other, and the upper surface of the limit stop device protrudes from the conveying surface of the conveyor belt.

[0006] Furthermore, the limit stop device includes a limit plate and a rotating pin. The limit plate has a rotating hole in the middle, and the rotating pin passes through the rotating hole and is fixed on the side of the conveyor frame. The limit plate can rotate relative to the conveyor frame around the rotating pin.

[0007] Furthermore, the lower part of the limiting plate is provided with a swing adjustment groove, and a swing limiting pin is provided in the swing adjustment groove. The swing limiting pin passes through the swing adjustment groove and is fixed on the side of the conveyor frame. When the limiting plate rotates relative to the conveyor frame around the rotating pin, the swing limiting pin slides in the swing adjustment groove and limits the rotation angle of the limiting plate.

[0008] Furthermore, a limiting part extends obliquely upward from the upper part of the limiting plate near the center of the conveyor frame. The side of the limiting part near the center of the conveyor frame is a vertical limiting surface, and the side of the limiting part away from the center of the conveyor frame is a transition slope. In the initial state, the vertical limiting surface of the limiting part is higher than the conveying surface of the conveyor belt.

[0009] Furthermore, the limiting part is provided with a hollow hole. When the limiting and stopping device limits the pallet, the hollow hole on the limiting part of the limiting plate can buffer the impact force of the pallet acting on the limiting part.

[0010] Furthermore, a method for handling shuttle cars entering a warehouse using a conveyor line limit stop device.

[0011] Step S1: The elevator lifts and transports the pallet carrying the goods to the conveyor belt of the conveyor mechanism away from the conveyor surface of the automated warehouse;

[0012] Step S2: Start the conveyor mechanism to make the conveyor belt drive in the forward direction, so that the pallet carrying the goods on the conveyor surface of the conveyor belt moves towards the direction of the three-dimensional rack;

[0013] Step S3: When the pallet carrying the goods is driven by the conveyor belt, when the side of the pallet's support leg closest to the automated warehouse comes into contact with the vertical limiting surface, the limiting plate rotates around the rotating pin in the direction away from the center of the conveyor frame, until the swing limiting pin and the end of the swing adjustment groove away from the center of the conveyor frame press against each other, at which point the vertical limiting surface comes into contact with the pallet.

[0014] Step S4: In the state of step S3, the two photoelectric detection devices installed at both ends of the conveyor frame control the drive mechanism installed below the conveyor frame to stop, thereby stopping the conveyor belt from moving;

[0015] Step S5: In the state of step S4, the shuttle travels to a section of the travel track located below the two conveyor belts and makes contact with the limiting plate. At this time, the lifting plate of the shuttle is facing the lower surface of the pallet carrying the goods.

[0016] Step S6: In the state of step S5, the lifting platform of the shuttle car rises and lifts the pallet carrying the goods, and then transports the pallet carrying the goods along the travel track and places it into the automated warehouse, completing the warehousing process.

[0017] Furthermore, a method for handling shuttle cars during the outbound process using a conveyor line limit stop device.

[0018] Step S7: The shuttle transports the pallet carrying the goods to the conveyor surface of the conveyor belt of the conveyor mechanism near the end of the automated warehouse;

[0019] Step S8: Start the conveyor mechanism to reverse the transmission of the conveyor belt, thereby moving the pallet carrying the goods on the conveyor surface of the conveyor belt away from the automated racking system.

[0020] Step S9: When the pallet carrying goods is driven by the conveyor belt, when the lower contour of the support leg on the side of the pallet carrying goods away from the automated warehouse comes into contact with the transition slope on the limit plate, the lower contour of the lower support leg of the pallet carrying goods presses down the limiting part of the limit stop device along the transition slope. During this process, the limit plate rotates around the rotating pin in the direction of the limiting part near the center of the conveyor frame until the limit plate descends to below the conveyor surface under the action of the support leg of the pallet carrying goods. During this process, the upper contour of the limiting part is always in contact with the lower contour of the pallet carrying goods, and the limit plate does not hinder the pallet carrying goods from moving with the two conveyor belts.

[0021] Step S10: At this time, the goods on the pallet block the laser emitted by the laser emitters of the two photoelectric detection devices set at both ends of the conveyor frame along the length of the conveyor frame. The receiving devices of the two photoelectric detection devices cannot receive the laser emitted by the laser emitters. At this time, the photoelectric detection devices control the drive mechanism set below the conveyor frame to stop, so that the conveyor belt stops moving. At this time, the bottom of the pallet carrying the goods is directly above the lifting plate of the elevator.

[0022] Step S11: Subsequently, the lifting platform of the elevator rises and lifts the pallet carrying the goods, and lifts the pallet carrying the goods to the exit, thereby completing the outbound process.

[0023] Beneficial Effects: The conveyor line limiting and stopping device and the pallet handling method of the present invention, by setting a pallet limiting device on the conveyor mechanism, can ensure that pallets carrying goods of different weights or of different materials can be accurately stopped at the same position each time, without affecting the goods leaving the warehouse. This ensures that when the shuttle enters the conveyor line to pick up goods, the palletized goods are located in the center of the shuttle's lifting plate, which can significantly reduce the risk of goods shifting due to the palletized goods not being in the center of the shuttle's lifting plate, and the risk of goods falling due to the shuttle scraping the shelves during the handling process. Moreover, it can be applied to most scenarios of palletized goods docking through the conveyor line and has a wide range of applications. Attached Figure Description

[0024] Figure 1 This is a schematic diagram illustrating an application scenario of the conveyor line limiting and stopping device and the pallet handling method for entering and leaving the warehouse according to the present invention.

[0025] Figure 2 This is a schematic diagram of the transport line structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the limiting and stopping device of the present invention;

[0027] Figure 4 This is a schematic diagram showing the installation of the limiting and stopping device of the present invention with the transport frame of the transport line;

[0028] Figure 5 This is a magnified view of a portion of the image (A).

[0029] Figure 6 This is a schematic diagram of a conveyor line limiting and stopping device and a shuttle car entering the warehouse according to the present invention;

[0030] Figure 7 This is a magnified view of part B;

[0031] Figure 8 This is a schematic diagram of a conveyor line limiting and stopping device and a shuttle car exiting the warehouse according to the present invention;

[0032] Figure 9 This is a magnified view of a portion, C. Detailed Implementation

[0033] The invention will now be further described with reference to the accompanying drawings.

[0034] As attached Figure 1 The diagram illustrates a conveyor line limit stop device and a pallet handling method for inbound and outbound cargo. The method includes crisscrossing travel tracks 4, with an automated warehouse 1 and a conveyor mechanism 2 mounted above the tracks 4. The automated warehouse 1 and conveyor mechanism 2 can exchange goods via shuttle cars 3 that travel on the tracks 4, with the shuttle cars 3 moving beneath the automated warehouse 1 and conveyor mechanism 2. A limit stop device 5 is installed on the conveyor mechanism 2 near the automated warehouse 1. When a pallet 9 is placed on the conveyor surface 17, if the conveyor mechanism 2 is conveying goods in the forward direction for inbound transport (i.e., the pallet 9 moves from the end of the conveyor mechanism 2 away from the automated warehouse 1 to the end of the conveyor mechanism 2 near the automated warehouse 1), the limit stop device 5 makes contact with the pallet 9 carrying the goods. If the conveyor belt 8 is conveying goods out of the warehouse in the reverse direction, the pallet 9 presses the limit stop device 5 down below the conveyor surface 17.

[0035] The conveying mechanism 2 includes two sets of conveyor frames 7 arranged side by side on both sides of the travel track 4. The distance between the two conveyor frames 7 is greater than the width of the travel track 4 and the width of the shuttle car 3, thus ensuring that the shuttle car 3 can smoothly shuttle between the two conveyor frames 7. One end of each set of conveyor frames 7 is close to the automated warehouse 1, and the other end is connected to the elevator. Both sets of conveyor frames 7 are equipped with conveyor belts 8 that can be driven in both directions along their length. A drive mechanism is set below the center of each conveyor frame 7, which can drive the conveyor belts 8 to move in either direction. The two sets of conveyor frames 7 are equipped with a signal transmitting device and a signal receiving device of a photoelectric detection device 16 on the side that is far apart from each other. A limit stop device 5 is set on the side that is close to each other on either set of conveyor frames 7, and the upper surface of the limit stop device 5 protrudes. On the conveying surface of the conveyor belt 17, and with the pallet limiting device 5 between the two conveyor belts 8, a pallet 9 carrying goods is placed on the conveying surface 17. The lower sides of the pallet 9 are supported on the conveying surface 17 of the two conveyor belts 8. A section of the travel track 4 is located below the two conveyor belts 8 and is set higher than the drive mechanism, thereby ensuring that the shuttle car 3 can smoothly shuttle under the two conveyor belts. The travel surface of the section of the travel track 4 located below the two conveyor belts 8 is directly opposite the center area of ​​the lower surface of the pallet 9, thereby ensuring that when the shuttle car 3 is on the section of the travel track 4 located below the two conveyor belts 8, the lifting plate of the shuttle car 3 is located below the pallet 9. A limiting plate can be set on the section of the travel track 4 located below the two conveyor belts 8 so that when the shuttle car 3 is on the section of the travel track 4 located below the two conveyor belts 8 and contacts the limiting plate 10, the lifting plate of the shuttle car 3 is directly opposite the lower surface of the pallet 9.

[0036] Photoelectric detection devices 16 are installed at both ends of the conveyor frame 7 along its extension direction. The two photoelectric detection devices 16 are electrically connected to the conveyor belt 8. The two photoelectric detection devices 16 jointly control the transmission and stopping of the conveyor belt 8. Each of the two photoelectric detection devices 16 includes a laser emitting device and a laser receiving device. The two laser emitting devices are installed on one conveyor frame 7, and the two laser receiving devices are installed on the other conveyor frame 7. The two laser emitting devices and the two laser receiving devices are installed on the side of the two conveyor frames 7 that are far apart from each other. When a pallet 9 carrying goods is placed on the conveyor surface 17, if the conveyor belt 8 is conveying goods in the forward direction for warehousing, when the limit stop device 5 contacts the support leg limit of the pallet 9 carrying goods near the automated warehouse 1: at this time, the pallet 9 blocks the laser emitted by the laser emitters of the two photoelectric detection devices 16 installed at both ends of the conveyor frame 7 along both sides of the length direction of the conveyor frame 7, so that the receivers of the two photoelectric detection devices 16 cannot receive the laser emitted by the laser emitters. At this time, the photoelectric detection devices control the drive mechanism installed below the conveyor frame 7 to stop, thereby stopping the conveyor belt 8 from moving. If the conveyor belt 8 When the goods are conveyed in reverse for warehousing, the support legs of the pallet 9 carrying the goods away from the automated warehouse 1 press the limit stop device 5 down below the conveyor surface 17. When the pallet 9 blocks the laser emitted by the laser emitters of the two photoelectric detection devices 16 set at both ends of the conveyor frame 7 along the length of the conveyor frame 7, the receiving devices of the two photoelectric detection devices 16 cannot receive the laser emitted by the laser emitters. At this time, the photoelectric detection devices control the drive mechanism set below the conveyor frame 7 to stop, so that the conveyor belt 8 is no longer in motion. At this time, the bottom of the pallet 9 carrying the goods is directly above the lifting platform of the elevator.

[0037] The limiting stop device 5 includes a limiting plate 10 and a rotating pin 11. The limiting plate 10 has a rotating hole in the middle. The rotating pin 11 passes through the rotating hole and is fixed to the side of the conveyor frame 7. The radius of the pin head of the rotating pin 11 is larger than the radius of the rotating hole. That is, when the rotating pin 11 passes through the rotating hole and is fixed to the side of the conveyor frame 7, the limiting plate 10 is clamped on the side where the pin head of the rotating pin 11 and the conveyor frame 7 are close to each other. The rotating pin 11 makes one side of the limiting plate 10 contact one side of the conveyor frame 7. The limiting plate 10 can rotate relative to the conveyor frame 7 around the rotating pin 11.

[0038] The lower part of the limiting plate 10 is provided with a swing adjustment groove 14. The adjustment groove 14 is an arc-shaped groove coaxial with the rotation hole. A swing limiting pin 12 is provided in the swing adjustment groove 14. The swing limiting pin 12 passes through the swing adjustment groove 14 and is fixed on the side of the conveyor frame 7. When the limiting plate 10 rotates relative to the conveyor frame 7 around the rotation pin 11, the swing limiting pin 12 slides in the swing adjustment groove 14 and limits the rotation angle of the limiting plate 10.

[0039] A limiting part 15 extends obliquely upward from the upper part of the limiting plate 10 away from the automated warehouse 1. The side of the limiting part 15 away from the automated warehouse 1 is a vertical limiting surface 18, and the side of the limiting part 15 close to the automated warehouse 1 is a transition slope 19. In the initial state, the vertical limiting surface 18 of the limiting part 15 is higher than the conveying surface 17 of the conveyor belt 8, and the side of the transition slope 19 close to the automated warehouse 1 is lower than the side of the transition slope 19 away from the automated warehouse 1. During the forward conveying of the conveyor belt 8 for warehousing, when the support leg of the pallet 9 close to the automated warehouse 1 comes into contact with the vertical limiting surface 18, the pallet 9 impacts the limiting plate 10 under the action of friction between the conveyor belt 8 and the pallet 9. Under the action of the impact force, the limiting plate 10 rotates around the rotating pin 11 along the direction of the limiting part 15 close to the automated warehouse 1 until the swing limiting pin 12 and the swing adjustment groove 14 are close to the vertical limiting surface 18. One end of the storage unit 1 is pressed against the contact plate. At this time, the limiting plate 10 can no longer rotate around the rotating pin 11 relative to the conveyor frame 7. The distance between the vertical limiting surface 18 and the conveying surface 17 of the conveyor belt 8 is slightly higher than the distance between the vertical limiting surface 18 and the conveying surface 17 of the conveyor belt 8 in the initial state. At this time, the vertical limiting surface 18 is in contact with the pallet 9, so that the pallet 9 can no longer move with the conveyor belt 8. When the conveyor belt 8 is conveying in the reverse direction for outbound, the lower contour of the support foot on the side of the pallet 9 away from the storage unit 1 presses down the limiting part 15 of the pallet limiting device 5 along the transition slope 19. During this process, the limiting plate 10 rotates around the rotating pin 11 in the direction away from the storage unit 15 until the limiting plate 10 is lowered below the conveying surface 17 under the action of the support foot of the pallet 9. During this process, the upper contour of the limiting part 15 is always in contact with the lower contour of the pallet 9.

[0040] The limiting part 15 is provided with a hollow hole 13. The hollow hole 13 is located on the side of the limiting part 15 away from the automated warehouse 1 relative to the rotating pin 11. This arrangement makes the weight of the limiting plate 10 on the side away from the automated warehouse 1 less than the weight of the limiting plate 10 on the side close to the automated warehouse 1. As a result, in the initial state, that is, when the limiting plate 10 is only subjected to its own weight, the side of the limiting plate 10 away from the automated warehouse 1 protrudes upward from the conveying surface 17 of the conveyor belt 8, and the side of the limiting plate 10 away from the automated warehouse 1 is lowered downward from the conveying surface 17 of the conveyor belt 8.

[0041] The handling steps of a pallet receiving process for a conveyor line limit stop device:

[0042] Step S1: The elevator lifts and transports the pallet 9 carrying the goods to the conveyor belt 8 of the conveyor mechanism 7 away from the conveyor surface 17 of the automated warehouse 1;

[0043] Step S2: Start the conveyor mechanism 7 to make the conveyor belt 8 drive in the forward direction, so that the pallet 9 moves from the end of the conveyor belt 8 that is close to the automated warehouse 1 to the end of the conveyor belt 8 that is far away from the automated warehouse 1 under the drive of the conveyor belt 8.

[0044] Step S3: When one side of the support leg of the pallet 9 contacts the vertical limiting surface 18, under the action of the friction between the conveyor belt 8 and the pallet 9, the pallet 9 has an impact force on the limiting plate 10. Under the action of the above impact force, the limiting plate 10 rotates around the rotating pin 11 along the direction of the limiting part 15 close to the automated warehouse 1 until the swing limiting pin 12 and the swing adjusting groove 14 close to the end of the automated warehouse 1 come into contact. At this time, the limiting plate 10 can no longer rotate around the rotating pin 11 relative to the conveyor frame 7. The distance between the vertical limiting surface 18 and the conveying surface 17 of the conveyor belt 8 is slightly higher than the distance between the vertical limiting surface 18 and the conveying surface 17 of the conveyor belt 8 in the initial state. At this time, the vertical limiting surface 18 is in limiting contact with the pallet 9, so that the pallet 9 can no longer move with the conveyor belt 8.

[0045] Step S4: At this time, the tray 9 blocks the laser emitted by the laser emitting devices of the two photoelectric detection devices 16 set at both ends of the conveyor frame 7 along both sides of the length direction of the conveyor frame 7. The receiving devices of the two photoelectric detection devices 16 cannot receive the laser emitted by the laser emitting devices. At this time, the photoelectric detection device controls the drive mechanism set below the conveyor frame 7 to stop, so that the conveyor belt 8 stops moving.

[0046] Step S5: The shuttle 3 then travels to a section of track 4 located below the two conveyor belts 8 and comes into contact with the limiting post. At this time, the lifting plate of the shuttle 3 is directly opposite the lower surface of the pallet 9 carrying the goods.

[0047] Step S6: Then the lifting platform of the shuttle 3 rises and lifts the pallet 9 carrying the goods, and transports the pallet 9 carrying the goods to the automated warehouse 1 to complete the warehousing process.

[0048] The handling steps of a pallet outbound process using a conveyor line limit stop device:

[0049] Step S7: The shuttle 3 transports the pallet 9 carrying the goods to the conveyor surface 17 of the conveyor belt 8 of the conveyor mechanism 7, which is close to one end of the automated warehouse 1.

[0050] Step S8: Start the conveyor mechanism 7 to reverse the transmission of the conveyor belt 8, so that the pallet 9 moves from the end of the conveyor mechanism 2 away from the automated warehouse 1 to the end of the conveyor mechanism 2 close to the automated warehouse 1 under the drive of the transmission mechanism 2.

[0051] Step S9: When the lower support leg of the pallet 9 carrying the goods contacts the transition slope 19 on the limiting plate 10, the lower contour of the lower support leg of the pallet 9 carrying the goods presses down the limiting part 15 of the limiting stop device 5 along the transition slope 19. During this process, the limiting plate 10 rotates around the rotating pin 11 in the direction of the limiting part 15 near the center of the conveyor frame 7 until the limiting plate 10 descends to below the conveyor surface 17 under the action of the support leg of the pallet 9 carrying the goods. During this process, the upper contour of the limiting part 15 is always in contact with the lower contour of the pallet 9 carrying the goods, and the limiting plate 10 does not obstruct the pallet 9 carrying the goods from moving together with the two conveyor belts 8.

[0052] Step S10: At this time, the goods on the pallet 9 block the laser emitted by the laser emitters of the two photoelectric detection devices 16 set at both ends of the conveyor frame 7 along the length direction of the pallet 9. The receiving devices of the two photoelectric detection devices 16 cannot receive the laser emitted by the laser emitters. At this time, the photoelectric detection devices control the drive mechanism set below the conveyor frame 7 to stop, so that the conveyor belt 8 stops driving. At this time, the bottom of the pallet 9 carrying the goods is directly above the lifting plate of the elevator.

[0053] Step S11: Subsequently, the lifting platform of the elevator rises and lifts the pallet 9 carrying the goods, and lifts the pallet 9 carrying the goods to the exit, thereby completing the outbound process.

[0054] The above is a first embodiment of the conveyor line limiting and stopping device and the pallet handling method for entering and leaving the warehouse according to the present invention. Under certain circumstances, the present invention also has a second embodiment and a third embodiment:

[0055] In the second embodiment of this solution, when the goods carried on the pallet 9 placed on the conveyor mechanism 2 are fragile, the pallet 9 should avoid collision with the limit stop device 5. Therefore, a vertical electromagnetic controller can be hung on the support leg of the pallet 9 near the limit stop device 5. The electromagnetic controller is equipped with an electromagnet that can be controlled remotely. A magnet is installed on the lower part of the limit plate 10 near end A on the conveyor belt 8. When the electromagnetic controller is hung on the support leg of the pallet 9 near the limit stop device 5, the electromagnet on the electromagnetic controller is located below the conveying surface 17 of the conveyor belt 8 and directly opposite the magnet at the bottom of the limit plate 10. There is a repulsive force between the electromagnet on the electromagnetic controller and the magnet at the bottom of the limit plate 10. When the pallet carrying fragile goods... Pallets 9 are mounted on the conveyor surfaces 17 of the two sets of conveyor belts 8. At this time, the electromagnets on the electromagnetic control unit are activated by remote control. Then, the pallets 9 carrying fragile items move towards the limit stop device 5 under the drive of the two sets of conveyor belts 8. During this process, the electromagnets on the electromagnetic controller and the magnets on the limit plate 10 repel each other, causing the limit plate 10 to rotate around the rotating pin 11 along the direction of the limit part 15 near the center of the conveyor frame 7 until the limit plate 10 descends to below the conveyor surface 17 under the action of the support legs of the pallets 9 carrying the goods. In this way, the pallets 9 carrying fragile items will not collide with the limit stop device 5 during the conveyor line. Then, steps S4, S5 and S6 are performed to complete the warehousing process.

[0056] In the third embodiment of this solution, when goods in the automated warehouse 1 need to be inspected before leaving the warehouse, a limit stop device 5 is needed to limit the pallet 9 carrying the outgoing goods, so that the inspection device set at the end of the conveyor mechanism 2 near the automated warehouse 1 can scan and inspect the goods to be outgoing. A limit pin hole 20 is provided on the limit plate 10 of the limit stop device 5. The limit pin hole 20 is located between the rotating pin 11 and the swing limit pin 12, and is offset towards the center of the conveyor frame 7. An electric telescopic device is provided inside the set of conveyor frames 7 with the limit stop device 5 relative to the limit stop device 5. A limit pin is provided on the telescopic part of the electric telescopic device. When in the initial state, i.e., the limit... When the position plate 10 is only subjected to its own weight, the side of the position plate 10 closest to the center of the conveyor frame 7 protrudes upward beyond the conveyor surface 17 of the conveyor belt 8, while the side of the position plate 10 furthest from the center of the conveyor frame 7 is lower than the conveyor surface 17 of the conveyor belt 8. At this time, the telescopic part of the electric telescopic device installed inside the conveyor frame relative to the limit stop device 5 extends in the direction close to the limit stop device 5, and the limit pin provided on the telescopic part of the electric telescopic device can pass through the limit pin hole 20, thereby preventing the position plate 10 from rotating around the rotating pin 11. When the lifting plate of the shuttle car 3 lifts upward and places the pallet 9 carrying the outbound goods on the conveyor surface 17 of the conveyor belt 8 that is being transported in the opposite direction on the side of the conveyor mechanism 2 closest to the automated warehouse 1, the position plate 10 is positioned. At this time, the telescopic part of the electric telescopic device is extended in the direction close to the limit stop device 5 by remote control, so that the limit pin provided on the telescopic part of the electric telescopic device passes through the limit pin hole 20. At this time, the pallet 9 carrying the outbound goods is driven by the reverse conveyor belt 8 to connect with the transition slope 19 of the upper limit part 15 of the limit plate 10 near the side of the automated warehouse 1. However, because the limit pin provided on the telescopic part of the electric telescopic device is inserted into the limit pin hole 20 at this time, the limit plate 10 cannot rotate around the rotating pin 11. As a result, the lower end of the support leg of the pallet 9 carrying the outbound goods near the limit stop device 5 cannot press down on the limit plate 10, so that the limit stop device 5 will stop the pallet carrying the outbound goods. The pallet 9 is limited and the inspection device at the end of the conveyor mechanism 2 near the automated warehouse 1 scans and inspects the goods to be shipped. If the scan result is qualified, the telescopic part of the electric telescopic device is remotely controlled to retract in the direction of the limit stop device 5, so that the limit pin on the telescopic part of the electric telescopic device disengages from the limit pin hole 20. Thus, the limit plate 10 rotates around the rotating pin 11 in the direction of the limit part 15 near the center of the conveyor frame 7 under the action of the support legs of the pallet 9 carrying the outbound goods, until the limit plate 10 descends to below the conveyor surface 17. At this time, the pallet 9 carrying the outbound goods can be smoothly conveyed on the conveyor mechanism 2. Then, steps S10 and S11 are performed to complete the outbound process.

[0057] The above are the preferred embodiments described in this invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention.

Claims

1. A conveyor line limiting and stopping device, characterized in that: The system includes a three-dimensional rack (1), a conveyor mechanism (2), a shuttle (3), and crisscrossing running tracks (4). The three-dimensional rack (1) and the conveyor mechanism (2) are located above the running tracks (4) and do not contact each other. The shuttle (3) moves on the running tracks (4) and shuttles below the three-dimensional rack (1) and the conveyor mechanism (2). A limit stop device (5) is provided on the end of the conveyor mechanism (2) near the three-dimensional warehouse (1). When a pallet (9) is placed on the conveyor surface (17), if the conveyor mechanism (2) conveys the goods in the forward direction for storage, the limit stop device (5) makes contact with the pallet (9) carrying the goods. If the conveyor belt (8) conveys the goods out of the warehouse in the reverse direction, the pallet (9) presses the limit stop device (5) down to below the conveyor surface (17). The limiting stop device (5) includes a limiting plate (10) and a rotating pin (11). The limiting plate (10) has a rotating hole in the middle. The rotating pin (11) passes through the rotating hole and is fixed on the side of the conveyor frame (7). The limiting plate (10) can rotate relative to the conveyor frame (7) around the rotating pin (11). The lower part of the limiting plate (10) is provided with a swing adjustment groove (14), and a swing limiting pin (12) is provided in the swing adjustment groove (14). The swing limiting pin (12) passes through the swing adjustment groove (14) and is fixed on the side of the conveyor frame (7). When the limiting plate (10) rotates relative to the conveyor frame (7) around the rotating pin (11), the swing limiting pin (12) slides in the swing adjustment groove (14) and limits the rotation angle of the limiting plate (10). Photoelectric detection devices (16) are installed at both ends of the extension direction of the conveyor frame (7). The two photoelectric detection devices (16) are electrically connected to the conveyor belt (8). The two photoelectric detection devices (16) jointly control the transmission and stopping of the conveyor belt (8). The two photoelectric detection devices (16) each include a laser emitting device and a laser receiving device. The two laser emitting devices are installed on one conveyor frame (7), and the two laser receiving devices are installed on the other conveyor frame (7). The two laser emitting devices and the two laser receiving devices are installed on the side of the two conveyor frames (7) that are far apart from each other. A vertical electromagnetic controller is mounted on the support leg of the pallet (9) near the limit stop device (5). The electromagnetic controller is equipped with an electromagnet that can be controlled remotely. A magnet is installed on the lower part of the limit plate (10). When the electromagnetic controller is mounted on the support leg of the pallet (9) near the limit stop device (5), the electromagnet on the electromagnetic controller is located below the conveyor surface (17) of the conveyor belt (8) and directly opposite the magnet at the bottom of the limit plate (10). There is a repulsive force between the electromagnet on the electromagnetic controller and the magnet at the bottom of the limit plate (10). When the pallet (9) carrying fragile items is placed on the conveyor surface (17) of the two sets of conveyor belts (8), the electromagnet on the electromagnetic control unit is opened by remote control. Then the pallet (9) carrying fragile items moves between the two sets of conveyor belts (8). The conveyor belt (8) moves towards the limit stop device (5) under the transmission. During this process, the electromagnet on the electromagnetic controller and the magnet on the limit plate (10) repel each other, causing the limit plate (10) to rotate around the rotating pin (11) along the direction of the limit part (15) near the center of the conveyor frame (7) until the limit plate (10) is lowered to below the conveyor surface (17) under the action of the support legs of the pallet (9) carrying the goods. The goods carried on the pallet (9) block the laser emitted by the laser emitting devices of the two photoelectric detection devices (16) set at both ends of the conveyor frame (7) along the length direction of the conveyor frame (7). The photoelectric detection device controls the drive mechanism set below the conveyor frame (7) to stop, so that the conveyor belt (8) is no longer in motion.

2. The conveyor line limiting and stopping device according to claim 1, characterized in that: The conveying mechanism (2) includes two sets of conveyor frames (7) arranged side by side on both sides of the travel track (4). Both sets of conveyor frames (7) are provided with conveyor belts (8) that can be driven in both directions along the length direction. A limit stop device (5) is provided on the side of any set of conveyor frames (7) that is close to each other, and the upper surface of the limit stop device (5) protrudes from the conveying surface of the conveyor belt (17).

3. The conveyor line limiting and stopping device according to claim 1, characterized in that: The limiting plate (10) extends obliquely upward from the side near the center of the conveyor frame (7) to form a limiting part (15). The side of the limiting part (15) near the center of the conveyor frame (7) is a vertical limiting surface (18), and the side of the limiting part (15) away from the center of the conveyor frame (7) is a transition slope (19). In the initial state, the vertical limiting surface (18) of the limiting part (15) is higher than the conveying surface (17) of the conveyor belt (8).

4. The conveyor line limiting and stopping device according to claim 3, characterized in that: The limiting part (15) has a hollow hole (13), which is located on the side of the limiting part (15) away from the three-dimensional warehouse (1) relative to the rotating pin (11).

5. The method for handling pallets during the entry and exit of a conveyor line limit stop device according to claim 3, characterized in that: The handling methods during the warehousing process are as follows: Step S1: The elevator lifts and transports the pallet (9) carrying the goods to the conveyor belt (8) of the conveyor mechanism (7) away from the conveyor surface (17) of the automated warehouse (1); Step S2: Start the conveyor mechanism (7) to make the conveyor belt (8) drive in the forward direction, so that the pallet carrying the goods on the conveyor surface (17) of the conveyor belt (8) moves towards the direction of the three-dimensional rack (1); Step S3: When the pallet (9) carrying the goods is driven by the conveyor belt (8), when the side of the support leg of the pallet (9) close to the automated warehouse (1) comes into contact with the vertical limiting surface (18), the limiting plate (10) rotates around the rotating pin (11) along the direction of the limiting part (15) away from the center of the conveyor frame (7) until the swing limiting pin (12) and the end of the swing adjustment groove (14) away from the center of the conveyor frame (7) press against each other. At this time, the vertical limiting surface (18) and the pallet (9) are in limiting contact. Step S4: In the state of step S3, the two photoelectric detection devices (16) set on both ends of the conveyor frame (7) control the drive mechanism set below the conveyor frame (7) to stop, so that the conveyor belt (8) is no longer in motion; Step S5: In the state of step S4, the shuttle (3) travels to a section of the travel track (4) located below the two conveyor belts (8) and makes contact with the limiting plate. At this time, the lifting plate of the shuttle (3) is facing the lower surface of the pallet (9) carrying the goods. Step S6: In the state of step S5, the lifting plate of the shuttle (3) rises and lifts the pallet (9) carrying the goods, and then transports the pallet (9) carrying the goods along the travel track (4) and places it into the automated warehouse (1) to complete the warehousing process.

6. The method for handling pallets during the entry and exit of a conveyor line limit stop device according to claim 5, characterized in that: The handling methods during the outbound process are as follows: Step S7: The shuttle (3) transports the pallet (9) carrying the goods to the conveyor belt (8) of the conveyor mechanism (7) on the conveyor surface (17) near one end of the automated warehouse (1); Step S8: Start the conveyor mechanism (7) to reverse the transmission of the conveyor belt (8), thereby moving the pallet carrying the goods on the conveyor surface (17) of the conveyor belt (8) away from the three-dimensional rack (1); Step S9: When the pallet (9) carrying goods is driven by the conveyor belt (8), the lower contour of the support leg of the pallet (9) carrying goods away from the automated warehouse (1) comes into contact with the transition slope (19) on the limiting plate (10). The lower contour of the lower support leg of the pallet (9) carrying goods presses down the limiting part (15) of the limiting stop device (5) along the transition slope (19). During this process, the limiting plate (10) rotates around the rotating pin (11) in the direction of the limiting part (15) close to the center of the conveyor frame (7) until the limiting plate (10) descends to below the conveyor surface (17) under the action of the support leg of the pallet (9) carrying goods. During this process, the upper contour of the limiting part (15) always comes into contact with the lower contour of the pallet (9) carrying goods, and the limiting plate (10) does not hinder the pallet (9) carrying goods from moving together with the two conveyor belts (8). Step S10: At this time, the goods carried on the pallet (9) block the laser emitted by the laser emitting devices of the two photoelectric detection devices (16) set at both ends of the conveyor frame (7) along the length direction of the conveyor frame (7). The receiving devices of the two photoelectric detection devices (16) cannot receive the laser emitted by the laser emitting devices. At this time, the photoelectric detection device controls the drive mechanism set below the conveyor frame (7) to stop, so that the conveyor belt (8) is no longer in motion. At this time, the bottom of the pallet (9) carrying the goods is directly above the lifting plate of the elevator. Step S11: Then the lifting platform of the elevator rises and lifts the pallet (9) carrying the goods, and lifts the pallet (9) carrying the goods to the exit, thereby completing the outbound process.

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