Limiting and stopping device for tray conveying line

By installing limit devices and photoelectric detection devices on the conveyor line, the problem of palletized goods not being centered was solved, and accurate positioning and safe handling of pallets were achieved.

CN223619397UActive Publication Date: 2025-12-02SHANGHAI ZS ROBOTICS CO LTD
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Patent Information

Application Number
CN202423144416.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-19
Publication Date
2025-12-02
Estimated Expiration
2034-12-19

AI Technical Summary

Technical Problem

Existing conveyor lines cannot stop accurately when faced with palletized goods of different weights or materials, causing the palletized goods to become out of center and increasing the risk of the goods falling.

Method used

Limiting devices are installed on the conveyor line. Through the frame and conveyor belt, the combination of limiting plates and rotating pins enables accurate positioning of pallets under different weights or materials. Combined with photoelectric detection devices, the conveyor belt is stopped.

Benefits of technology

This ensures that the pallet is accurately positioned in the same location every time, reducing the risk of goods shifting or falling and ensuring that the handling device can accurately pick up the goods.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a limit stop device for a tray conveyor line, which comprises two groups of parallel racks and two groups of conveyor belts extending along the length direction of the racks, the conveyor belts perform forward or reverse conveying, one end of each rack is provided with the limit stop device, the upper end of the limit stop device protrudes out of the conveying surface of the conveyor belt, and the lower end of the limit stop device protrudes out of the conveying surface of the conveyor belt. A tray bearing goods is placed on the conveying surface; the end, away from the limiting and stopping device, of the conveying belt is an end A, the end, close to the limiting and stopping device, of the conveying belt is an end B, and when the tray is conveyed to the end B from the end A of the conveying belt, the limiting and stopping device makes limiting contact with the tray bearing goods to prevent the tray from continuing to move along with the conveying belt; in the initial stage of the process that the tray is conveyed from the end B to the end A of the conveying belt, the tray bearing goods downwards presses the limiting and stopping device to the position below the conveying face; and cargoes with different weights or trays made of different materials can be accurately stopped at the same position each time, and the risk that the cargoes fall in the carrying process is reduced.
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Description

Technical Field

[0001] This utility model belongs to the field of intelligent automated warehousing, and more specifically, it is a limit stop device for pallet conveyor lines. Background Technology

[0002] In automated warehousing, palletized goods outside the warehouse or palletized goods on elevators are typically connected via conveyor lines. Existing conveyor lines control the stopping action of the conveyor line through signals from photoelectric sensors. However, when the weight of the palletized goods is different or the pallet materials are inconsistent, the stopping position of the palletized goods will be inconsistent. This will cause the palletized goods to be out of center when the handling equipment enters the conveyor line to pick up the goods, resulting in the goods shifting, and the risk of the handling equipment scraping against the shelves during the handling process, which may cause the goods to fall. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a limiting and stopping device for pallet conveyor lines, which can accurately stop pallets carrying goods of different weights or of different materials at the same position each time, thereby ensuring that when the handling device enters the conveyor line to pick up goods, the pallet goods are located in the center of the lifting plate of the handling device, thereby reducing the risk of goods falling during the handling process.

[0004] Technical Solution: To achieve the above objectives, this utility model provides a limiting stop device for a pallet conveyor line, comprising two parallel sets of frames and two sets of conveyor belts extending along the length of the frames. The conveyor belts move forward or backward along the length of the frames. A limiting stop device is installed at one end of each frame, and the upper end of the limiting stop device protrudes from the conveying surface of the conveyor belt. A pallet carrying goods is placed on the conveying surface. Let the end of the conveyor belt furthest from the limiting stop device be end A, and the end closest to the limiting stop device be end B. When the pallet is conveyed from end A to end B of the conveyor belt, the limiting stop device makes limiting contact with the pallet carrying goods, preventing the pallet from continuing to move with the conveyor belt. In the initial stage of the process of the pallet being conveyed from end B to end A of the conveyor belt, the pallet carrying goods presses the limiting stop device down below the conveying surface.

[0005] 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 to the side of the frame. The limit plate can rotate relative to the frame around the rotating pin.

[0006] 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 frame. When the limiting plate rotates relative to the frame around the rotating pin, the swing limiting pin slides in the swing adjustment groove and limits the rotation angle of the limiting plate.

[0007] Furthermore, a limiting part extends obliquely upward from the upper part of the limiting plate near end A on the conveyor belt. The side of the limiting part near end A on the conveyor belt is a vertical limiting surface, and the side of the limiting part near end B on the conveyor belt 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.

[0008] Furthermore, the center of gravity of the limiting plate is located on the side of the rotating pin near end A on the conveyor belt.

[0009] Furthermore, the swing adjustment groove is an arc-shaped groove coaxial with the rotating hole, and is positioned relative to the rotating pin on the side of end A on the conveyor belt.

[0010] Furthermore, a limit stop device is located between the two conveyor belts; the lower ends of the tray are mounted on both sides of the conveyor surface of the two conveyor belts.

[0011] Beneficial effects: This utility model provides a limiting and stopping device for pallet conveyor lines. By setting a limiting and stopping device on the conveyor mechanism, it 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 outbound process. This ensures that when the handling device enters the conveyor line to pick up goods, the palletized goods are located in the center of the lifting plate of the handling device, reducing the risk of goods shifting due to the palletized goods not being in the center of the lifting plate, and the risk of goods falling due to the handling device scraping the shelves during the handling process. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a pallet conveyor device according to the present invention, which is a limit stop device for a pallet conveyor line.

[0013] Figure 2 This is a schematic diagram of a limiting and stopping device for a pallet conveyor line according to the present invention;

[0014] Figure 3 This is a schematic diagram of the warehousing process of a limiting and stopping device for a pallet conveyor line according to the present invention;

[0015] Figure 4 This is a schematic diagram of the outbound process of a limit stop device for a pallet conveyor line according to the present invention. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] As attached Figure 1As shown, a limiting stop device for a pallet conveyor line includes two parallel sets of frames 7 and two sets of conveyor belts 8 extending along the length of the frames 7. A drive mechanism is provided below the center of the frames 7, which can drive the conveyor belts 8 to move forward or backward, so that the conveyor belts 8 move forward or backward along the length of the frames 7. A limiting stop device 5 is installed at one end of the frames 7, and the upper end of the limiting stop device 5 protrudes from the conveying surface 17 of the conveyor belts 8; the limiting stop device 5 is located between the two conveyor belts 8, and a limit stop device is placed on the conveying surface 17. There is a pallet 9 carrying goods, with the lower sides of the pallet 9 supported on the conveyor surfaces 17 of two conveyor belts 8. Let the end of the conveyor belt 8 away from the limit stop device 5 be end A, and the end closer to the limit stop device 5 be end B. When the pallet 9 is conveyed from end A to end B of the conveyor belt 8, the limit stop device 5 makes contact with the pallet 9 carrying goods, preventing the pallet 9 from continuing to move with the conveyor belt 8. When the pallet 9 is conveyed from end B to end A of the conveyor belt 8, the pallet 9 carrying goods presses the limit stop device 5 down below the conveyor surface 17.

[0018] like Figure 1 As shown, photoelectric detection devices 16 are installed at both ends of the 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. 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 frame 7, and the two laser receiving devices are installed on the other frame 7. The two laser emitting devices and the two laser receiving devices are installed on the side of the two frames 7 that are far apart from each other.

[0019] like Figure 2 As shown, the limiting stop device 5 includes a limiting plate 10 and a rotating pin 11. A rotating hole is provided in the middle of the limiting plate 10. The rotating pin 11 passes through the rotating hole and is fixed on the side of the 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 on the side of the frame 7, the limiting plate 10 is clamped on the side where the pin head of the rotating pin 11 and the frame 7 are close to each other. The rotating pin 11 makes one side of the limiting plate 10 contact one side of the frame 7, and the limiting plate 10 can rotate relative to the frame 7 around the rotating pin 11.

[0020] The lower part of the limiting plate 10 is provided with a swing adjustment groove 14. The swing adjustment groove 14 is an arc-shaped groove coaxial with the rotating hole and is set on the side of the conveyor belt 8 relative to the rotating pin 11. 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 frame 7. When the limiting plate 10 rotates relative to the 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.

[0021] like Figure 3 and 4 As shown, a limiting part 15 extends obliquely upward from the upper part of the limiting plate 10 near end A of the conveyor belt 8. The side of the limiting part 15 near end A of the conveyor belt 8 is a vertical limiting surface 18, and the side of the limiting part 15 near end B of the conveyor belt 8 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 near end B of the conveyor belt 8 is lower than the side of the transition slope 19 near end A of the conveyor belt 8. When the conveyor belt 8 is conveying in the forward direction for storage, when the support leg of the pallet 9 near end B of the conveyor belt 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 clockwise around the rotating pin 11 until the swing limiting pin 12 and the swing adjustment groove are engaged. 14. The end of the limit plate 10 near the B end of the conveyor belt 8 is pressed into contact. At this time, the limit plate 10 can no longer rotate relative to the frame 7 around the rotating pin 11. The distance between the vertical limit surface 18 and the conveying surface 17 of the conveyor belt 8 is slightly higher than the distance between the vertical limit surface 18 and the conveying surface 17 of the conveyor belt 8 in the initial state. At this time, the vertical limit surface 18 is in contact with the tray 9, so that the tray 9 can no longer move with the conveyor belt 8. When the conveyor belt 8 is conveyed in the reverse direction, the lower contour of the support foot of the tray 9 presses down the limit part 15 of the limit stop device 5 along the transition slope 19. During this process, the limit plate 10 rotates around the rotating pin 11 in the direction of the limit part 15 near the A end of the conveyor belt 8 until the limit plate 10 is lowered to below the conveying surface 17 under the action of the support foot of the tray 9. During this process, the upper contour of the limit part 15 is always in contact with the lower contour of the tray 9.

[0022] A perforated hole 13 is provided on the limiting part 15. The perforated hole 13 is located on the side of the limiting part 15 that is closer to end A on the conveyor belt 8 relative to the rotating pin 11. This arrangement makes the center of gravity of the limiting plate 10 located on the side of the rotating pin 11 that is closer to end A on the conveyor belt 8. That is, the weight of the limiting plate 10 on the side of the limiting plate 10 that is closer to end B on the conveyor belt 8 is less than the weight of the limiting plate 10 on the side of the limiting plate 10 that is closer to end B on the conveyor belt 8. Thus, 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 that is closer to end A on the conveyor belt 8 protrudes upward from the conveying surface 17 of the conveyor belt 8, and the side of the limiting plate 10 that is closer to end B on the conveyor belt 8 is lower downward from the conveying surface 17 of the conveyor belt 8.

[0023] The working method of the limiting and stopping device for a pallet conveyor line described in this utility model is as follows: A pallet 9 placed on the conveyor surface 17 of a conveyor belt 8 is conveyed from end A to end B of the conveyor belt 8 under the drive of the conveyor belt 8. When one side of the lower support leg of the pallet 9 carrying goods contacts the vertical limiting surface 18 on the limiting plate 10, the pallet 9 carrying goods impacts the limiting plate 10 due to the friction between the conveyor belt 8 and the pallet 9. Under the action of this impact, the limiting plate 10 rotates around the rotating pin 11 along the direction of the limiting part 15 near end B of the conveyor belt 8 until the swing limiting pin 12 and the end of the swing adjusting groove 14 near end B of the conveyor belt 8 are in contact. At this time, the limiting plate 10 can no longer rotate relative to the frame 7 around the rotating pin 11. The distance between the vertical limiting surface 18 and the conveyor surface 17 of the conveyor belt 8 is slightly higher than the initial vertical limiting surface 18. The distance between the vertical limiting surface 18 and the conveying surface 17 of the conveyor belt 8 is such that the vertical limiting surface 18 makes limiting contact with the pallet 9 carrying the goods, preventing the pallet 9 from continuing to move with the conveyor belt 8. At this time, the pallet 9 blocks the laser emitted by the laser emitting devices of the two photoelectric detection devices 16 set at both ends of the frame 7 along both sides of the length direction of the 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 frame 7 to stop, so that the conveyor belt 8 stops driving. Then the transport device travels to the bottom of the two frames 7, and the lifting plate of the transport device is directly opposite the lower surface of the pallet 9 carrying the goods. Then the lifting plate of the transport device rises and lifts the pallet 9 carrying the goods located on the conveying surface 17 of the two sets of conveyor belts 8, and transports the pallet 9 carrying the goods to the warehouse to complete the warehousing process.

[0024] As the pallet 9 placed on the conveyor surface 17 of the conveyor belt 8 is conveyed from end B to end A under the drive of the conveyor belt 8, when the lower support of the pallet 9 carrying the goods comes into contact with the transition slope 19 on the limiting plate 10, the lower contour of the lower support 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 along the direction of the limiting part 15 towards end A on the conveyor belt 8 until the limiting plate 10 descends to below the conveyor surface 17 under the force of the support 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 hinder the pallet 9 carrying the goods from moving together with the two conveyor belts 8.

[0025] The above are the preferred embodiments described in this utility model. 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 utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A limiting and stopping device for a pallet conveyor line, characterized in that: The system includes two parallel sets of racks (7) and two sets of conveyor belts (8) extending along the length of the racks (7). The conveyor belts (8) transport goods in either the forward or reverse direction along the length of the racks (7). A limit stop device (5) is installed at one end of each rack (7), and the upper end of the limit stop device (5) protrudes beyond the conveying surface (17) of the conveyor belt (8). A pallet (9) carrying goods is placed on the conveying surface (17). The conveyor belt (8) is positioned away from the limit stop device (5). One end is end A, and the end near the limiting stop device (5) is end B. When the pallet (9) is conveyed from end A to end B of the conveyor belt (8), the limiting stop device (5) makes limiting contact with the pallet (9) carrying the goods, preventing the pallet (9) from continuing to follow the conveyor belt (8). In the initial stage of the process of the pallet (9) being conveyed from end B to end A of the conveyor belt (8), the pallet (9) carrying the goods presses the limiting stop device (5) down below the conveyor surface (17).

2. The limiting and stopping device for a pallet conveyor line according to claim 1, characterized in that: 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 frame (7). The limiting plate (10) can rotate relative to the frame (7) around the rotating pin (11).

3. A limiting and stopping device for a pallet conveyor line according to claim 2, characterized in that: 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 frame (7). When the limiting plate (10) rotates relative to the 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).

4. A limiting and stopping device for a pallet conveyor line according to claim 2, characterized in that: The upper part of the limiting plate (10) extends obliquely upward from the side of end A on the conveyor belt (8) to form a limiting part (15). The side of the limiting part (15) near end A on the conveyor belt (8) is a vertical limiting surface (18), and the side of the limiting part (15) near end B on the conveyor belt (8) 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).

5. A limiting and stopping device for a pallet conveyor line according to claim 2, characterized in that: The center of gravity of the limiting plate (10) is located on the side of the rotating pin (11) near end A on the conveyor belt (8).

6. A limiting and stopping device for a pallet conveyor line according to claim 3, characterized in that: The swing adjustment groove (14) is an arc-shaped groove coaxial with the rotating hole, and is set on the side of end A on the conveyor belt (8) relative to the rotating pin (11).

7. A limiting and stopping device for a pallet conveyor line according to claim 1, characterized in that: The limiting stop device (5) is located between the two conveyor belts (8); the two sides of the lower end of the tray (9) are mounted on the conveying surfaces (17) of the two conveyor belts (8).