Sorting system

Abstract

The utility model discloses a sorting system, and relates to the technical field of warehouse logistics, the sorting system comprises a goods shelf, a sorting track, at least one carrying vehicle, a lifting device and a descending device; the goods shelf is provided with at least two layers of storage units used for storing goods. The sorting track comprises at least two layers of track units which correspond to the at least two layers of storage units layer by layer; the lifting device and the descending device are located on the two sides of the sorting track and used for lifting or descending the carrier to the track unit of the corresponding target layer. The carrying vehicle moves on the track unit and carries the goods to the corresponding storage unit; the rail unit comprises a temporary storage section, the temporary storage section is arranged on one side of the lifting device, the temporary storage section is used for parking the carrying vehicle, and the goods sorting and transporting efficiency of the sorting system is high.

Description

Technical Field

[0001] This application relates to the technical field of warehousing logistics, and particularly to a sorting system. Background Art

[0002] The sorting system is an indispensable part of the modern logistics industry, mainly used for efficiently and accurately classifying and distributing a large number of goods. With the rapid development of e-commerce, the demand for sorting systems has increased significantly.

[0003] Existing sorting systems mainly rely on manual operations, which require testing the experience and physical strength of manual operators. The operator manually scans the barcodes or QR codes on the goods to confirm the destination of the goods, and then transports the goods to the corresponding shelf positions.

[0004] However, in a logistics center, operators need to frequently move and transport goods, with a relatively high work intensity, and are prone to sorting errors, resulting in low efficiency of goods sorting and transportation. Summary of the Utility Model

[0005] In view of the above problems, the embodiments of this application provide a sorting system, which can improve the efficiency of goods sorting and the efficiency of transporting goods back to the warehouse.

[0006] To achieve the above object, the embodiments of this application provide the following technical solutions:

[0007] The embodiments of this application provide a sorting system, including a shelf, a sorting track, at least one carrier vehicle, a lifting device, and a lowering device; the shelf has at least two layers of storage units for storing goods; the sorting track includes at least two layers of track units, and corresponds to the at least two layers of storage units layer by layer;

[0008] The lifting device and the lowering device are located on both sides of the sorting track, and are used to lift or lower the carrier vehicle to the corresponding track unit of the target layer; the carrier vehicle moves on the track unit and transports the goods to the corresponding storage unit;

[0009] The track unit includes a buffer section, which is arranged on one side of the lifting device, and the buffer section is used to park the carrier vehicle.

[0010] As a possible implementation manner, the lifting device includes two synchronously rotating rotary lifting mechanisms and a first driving component, and the two rotary lifting mechanisms are arranged at intervals to form a first channel;

[0011] The first driving component includes two first driving members, and each first driving member is drivingly connected to one rotary lifting mechanism to lift the carrier vehicle that drives into the lifting plate assembly through the first channel;

[0012] And / or, the lowering device includes two synchronously rotating rotary lowering mechanisms and a second driving assembly. The two rotary lowering mechanisms are arranged at intervals to form a second passage;

[0013] The second driving assembly includes two second driving members. Each second driving member is drivingly connected to one of the rotary lowering mechanisms to drive the carrier vehicle driving into the rotary lowering mechanism through the second passage to lower.

[0014] As a possible implementation manner, the lifting device includes two synchronously rotating rotary lifting mechanisms and a third driving assembly. The two rotary lifting mechanisms are arranged at intervals to form a first passage; the third driving assembly includes a third driving member and a first reversing member. The first reversing member is drivingly connected between the third driving member and the rotary lifting mechanism, and the third driving member and the first reversing member cooperate to drive the rotary lifting mechanism;

[0015] And / or, the lowering device includes two synchronously rotating rotary lowering mechanisms and a fourth driving assembly. The two rotary lowering mechanisms are arranged at intervals to form a second passage; the fourth driving assembly includes a fourth driving member and a second reversing member. The second reversing member is drivingly connected between the fourth driving member and the rotary lowering mechanism, and the fourth driving member and the second reversing member cooperate to drive the rotary lowering mechanism.

[0016] As a possible implementation manner, the lifting device further includes a lifting plate assembly for carrying the carrier vehicle. Along the height direction of the rotary lifting mechanism, a plurality of the lifting plate assemblies are arranged at intervals on the rotary lifting mechanism, and the lifting plate assemblies on the two rotary lifting mechanisms are arranged oppositely. The distance between adjacent pairs of the lifting plate assemblies is equal to the distance between adjacent two layers of the track units;

[0017] And / or, the lowering device further includes a lowering plate assembly for carrying the carrier vehicle. Along the height direction of the rotary lowering mechanism, a plurality of the lowering plate assemblies are arranged at intervals on the rotary lowering mechanism, and the lowering plate assemblies on the two rotary lowering mechanisms are arranged oppositely. The distance between adjacent pairs of the lowering plate assemblies is equal to the distance between adjacent two layers of the track units.

[0018] As a possible implementation, it further includes a control device. The lifting device includes at least one first rack, and the two rotary lifting mechanisms are spaced apart on the first rack to form the first channel. At least two first zero-position sensors are provided on the first rack, and the heights of the two first zero-position sensors on the first rack are the same as the height of one of the layers in the track unit. The first zero-position sensors and the rotary lifting mechanisms are both communicatively connected to the control device. The lifting plate assembly is provided with a first zero-position trigger. In response to the first zero-position sensor detecting the first zero-position trigger, a stop signal is sent to the control device to control the rotary lifting mechanism to stop rotating, so that the carrier can drive into or out of the first channel.

[0019] And / or, the lowering device includes at least one second rack, and the two rotary lowering mechanisms are spaced apart on the second rack to form the second channel. At least two second zero-position sensors are provided on the second rack, and the heights of the two second zero-position sensors on the second rack are the same as the height of one of the layers in the track unit. The second zero-position sensors and the rotary lowering mechanisms are both communicatively connected to the control device. The lowering plate assembly is provided with a second zero-position trigger. In response to the second zero-position sensor detecting the second zero-position trigger, a stop signal is sent to the control device to control the rotary lowering mechanism to stop rotating, so that the carrier can drive into or out of the second channel.

[0020] As a possible implementation, the control device is communicatively connected to the lifting device, the lowering device and the carrier. The lifting plate assembly includes a first in-place trigger, the lifting device is provided with a first in-place sensor, and the carrier is provided with a second in-place sensor and a second in-place trigger. In response to the second in-place sensor detecting the first in-place trigger, a first in-place signal is sent to the control device to control the carrier to stop. In response to the first in-place sensor detecting the second in-place trigger, a second in-place signal is sent to the control device to control the lifting device to drive the carrier to rise.

[0021] And / or, the lowering plate assembly includes a third in-place trigger, the lowering device is provided with a third in-place sensor, and the carrier is provided with a fourth in-place sensor and a fourth in-place trigger. In response to the fourth in-place sensor detecting the third in-place trigger, a third in-place signal is sent to the control device to control the carrier to stop. In response to the third in-place sensor detecting the fourth in-place trigger, a fourth in-place signal is sent to the control device to enable the control device to control the lowering device to drive the carrier to lower.

[0022] As a possible implementation, in the lifting device, the first in-place sensor is disposed near the bottom of the first rack and is opposite to the bottom track unit. In response to detecting the second in-place trigger, it sends a second in-place signal to the control device to control the carrier to rise to any layer of the track unit.

[0023] And / or, in the lowering device, a plurality of the third in-place sensors are arranged at intervals along the height direction of the second rack and are arranged layer by layer corresponding to the track units except the bottom track unit. In response to detecting the fourth in-place trigger, it sends a fourth in-place signal to the control device to control the carrier to descend to the bottom track unit.

[0024] As a possible implementation, it further includes a first overrun sensor. Two first overrun sensors are arranged at intervals on the first rack. One of the first overrun sensors is located between the bottom end of the first rack and the first in-place sensor, and the other first overrun sensor is arranged near the top end of the first rack. In response to the first overrun sensor detecting the second in-place trigger, it emits an alarm signal indicating that the carrier exceeds its own moving distance range.

[0025] And / or, it further includes a second overrun sensor. Two second overrun sensors are arranged at intervals on the second rack. One of the second overrun sensors is located between the bottom end of the second rack and the third in-place sensor, and the other second overrun sensor is arranged near the top end of the second rack. In response to the second overrun sensor detecting the fourth in-place trigger, it emits an alarm signal indicating that the carrier exceeds its own moving distance range.

[0026] As a possible implementation, it further includes at least two sorting conveyor lines; the sorting conveyor lines are arranged at intervals on one side of the track unit, or the sorting conveyor lines are arranged at intervals on both sides of the track unit.

[0027] As a possible implementation, it further includes a control device. The sorting conveyor line includes at least three sequentially connected conveying sections, and the conveying sections are signal-connected to the control device;

[0028] The control device can independently control the working state of each conveying section;

[0029] The conveying section located in the first section is used to receive the goods delivery; the conveying section located in the second section is used to transport the goods to the carrier; at least one conveying section between the first section and the second section is used to temporarily store the goods.

[0030] The sorting system provided by the embodiments of the present application at least has the following beneficial effects:

[0031] The shelves in the system have at least two layers of storage units, which correspond layer by layer to the multi-layer track units of the sorting track, making full use of the vertical space for storing goods and improving the space utilization rate of the warehouse. The handling vehicle can move on the track units and quickly switch between different layers through the lifting device and the lowering device, shortening the time from storage to sorting of the goods and improving the response speed of the system. The track unit includes a buffer section, which is used to park the handling vehicle. The setting of the buffer section can reduce the probability of the lifting device being idle due to the stagnation of bag supply, improving the operation efficiency and stability of the sorting system. Through the automated handling vehicle and track system, the dependence on manual operation is reduced, the labor cost is lowered, and at the same time, the accuracy and consistency of the sorting process are improved. In addition, each component of the system has a modular design and can be flexibly configured and expanded according to actual needs to adapt to logistics requirements of different scales and complexities.

[0032] In addition to the technical problems solved by the embodiments of the present application described above, the technical features constituting the technical solutions, and the beneficial effects brought by these technical features of the technical solutions, other technical problems that the sorting system provided by the embodiments of the present application can solve, other technical features included in the technical solutions, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 It is a schematic diagram of the overall layout of the sorting system provided by the embodiments of the present application;

[0035] Figure 2 It is a top view of the sorting system provided by the embodiments of the present application;

[0036] Figure 3 It is a schematic structural diagram of the lifting device provided by the embodiments of the present application;

[0037] Figure 4 It is a schematic structural diagram of the lifting mechanism provided by the embodiments of the present application;

[0038] Figure 5 For Figure 4 It is an enlarged structural diagram of area A in

[0039] Figure 6Structural schematic diagram of the lifting plate assembly according to an embodiment of the present application;

[0040] Figure 7 Structural schematic diagram of the sorting and transportation line according to an embodiment of the present application;

[0041] Figure 8 Structural schematic diagram of the sorting robot according to an embodiment of the present application;

[0042] Figure 9 Structural schematic diagram of the sorting robot located in the lifting device according to an embodiment of the present application;

[0043] Figure 10 is Figure 9 Enlarged structural schematic diagram of area B in

[0044] Figure 11 is Figure 9 Structural schematic diagram from another perspective;

[0045] Figure 12 is Figure 11 Enlarged structural schematic diagram of area C in

[0046] Figure 13 is Figure 9 Top view structural schematic diagram of

[0047] Figure 14 is Figure 13 Enlarged structural schematic diagram of area D in

[0048] Explanation of reference numerals:

[0049] 100 - Shelf;

[0050] 110 - Storage unit;

[0051] 200 - Sorting station;

[0052] 210 - Sorting track;

[0053] 211 - Track unit; 2111 - Transportation section; 2112 - Buffer section;

[0054] 220 - Sorting conveyor line;

[0055] 221 - First conveyor line; 222 - Second conveyor line;

[0056] 223 - Third conveyor line; 224 - Barcode reading camera;

[0057] 230 - Pantograph;

[0058] 300 - Sorting robot;

[0059] 310 - Carrier vehicle;

[0060] 311 - In - place lifting sensing component;

[0061] 3111 - Second in - place sensor; 3112 - Second in - place trigger;

[0062] 312 - Vehicle body; 313 - Traveling wheel; 314 - Conveyor belt; 315 - Limiting wheel;

[0063] 400 - Lifting device;

[0064] 410 - Rotary lifting mechanism;

[0065] 411 - First rotary belt; 412 - First drive pulley; 413 - First rotating shaft;

[0066] 420 - Lifting plate assembly;

[0067] 421 - First zero - position trigger;

[0068] 422 - Lifting plate; 4221 - Blocking part;

[0069] 423 - Lifting guide wheel set; 4231 - First guide wheel; 4232 - Second guide wheel;

[0070] 424 - First in - place trigger;

[0071] 430 - First drive assembly;

[0072] 431 - First drive motor; 432 - Coupling;

[0073] 500 - Lowering device;

[0074] 600 - Control device;

[0075] 700 - First frame;

[0076] 710 - Underframe;

[0077] 720 - Support frame;

[0078] 721 - First zero - position sensor;

[0079] 722 - Guide groove; 7221 - First guide groove; 7222 - Second guide groove;

[0080] 723 - First in - place sensor;

[0081] 724 - Fixed bracket;

[0082] 730 - First crossbeam; 740 - First column; 741 - First over - limit sensor. Specific embodiments

[0083] As described in the background art, the sorting system is an indispensable part of the modern logistics industry, mainly used for efficiently and accurately classifying and distributing a large number of goods. With the rapid development of e-commerce, the demand for sorting systems has increased significantly, especially for internal logistics processes, that is, the logistics activities carried out within an enterprise, including processes such as material handling, storage, sorting, packaging, loading and unloading. Internal logistics occupies a key position in the entire supply chain and directly affects the operation efficiency of the enterprise and customer satisfaction. The existing sorting systems mainly rely on manual operations, which require testing the experience and physical strength of manual operators. The operator manually scans the barcodes or QR codes on the goods to confirm the destination of the goods, and then transports the goods to the corresponding shelf positions. However, in a logistics center, the operator needs to frequently move and handle goods, with a relatively high work intensity, and is prone to sorting errors, resulting in low sorting efficiency.

[0084] To address the above technical problems, the sorting system provided in the embodiments of the present application has at least two layers of storage units on the shelves, which correspond layer by layer to the multi-layer track units of the sorting track, making full use of the vertical space for storing goods and improving the space utilization rate of the warehouse. The handling vehicle can move on the track unit and quickly switch between different layers through the lifting device and the lowering device, shortening the time from storage to sorting of the goods and improving the response speed of the system. The track unit includes a buffer section, which is used to park the handling vehicle. The setting of the buffer section can reduce the probability of the lifting device being idle due to the stagnation of package supply, improving the operation efficiency and stability of the sorting system. Through the automated handling vehicle and track system, the dependence on manual operations is reduced, the labor cost is lowered, and at the same time the accuracy and consistency of the sorting process are improved. In addition, each component of the system has a modular design and can be flexibly configured and expanded according to actual needs to adapt to logistics requirements of different scales and complexities.

[0085] In order to make the above objects, features, and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0086] Reference Figures 1 to 14, the sorting system provided by the embodiments of the present application includes a shelf 100, a sorting track 210, at least one carrier 310, a lifting device 400, and a lowering device 500; the shelf 100 has at least two layers of storage units 110 for storing goods; the sorting track 210 includes at least two layers of track units 211 and corresponds layer by layer to at least two layers of storage units 110; the lifting device 400 and the lowering device 500 are located on both sides of the sorting track 210 and are used to lift or lower the carrier 310 to the corresponding track unit 211 of the target layer; the carrier 310 moves on the track unit 211 and transports the goods to the corresponding storage unit 110; the track unit 211 includes a buffer section 2112, and the buffer section 2112 is arranged close to the lifting device 400, and the buffer section 2112 is used to park the carrier 310.

[0087] Exemplarily, there are two carriers 310, the sorting track 210 includes four layers of track units 211, the shelf 100 has four layers of storage units 110, one carrier 310 is located in the transportation section 2111, and the other carrier 310 is parked in the buffer section 2112. There can also be three carriers 310, or four carriers 310.

[0088] With such a design, the carrier 310 can move on the track unit 211 and quickly switch between different layers through the lifting device 400 and the lowering device 500, shortening the time from storage to sorting of the goods and improving the response speed of the system. The track unit 211 includes a buffer section 2112, and the buffer section 2112 is used to park the carrier 310. The setting of the buffer section 2112 can reduce the probability of the lifting device 400 being idle due to the stagnation of bag supply. The operation efficiency and stability of the sorting system are improved. Among them, the reasons for the stagnation of bag supply can include the interruption of goods transportation due to the failure of the bag supply line equipment, and the error or interruption of goods placement caused by human factors. Through the automated carrier 310 and track system, the dependence on manual operation is reduced, the labor cost is lowered, and at the same time, the accuracy and consistency of the sorting process are improved. In addition, each component of the system has a modular design and can be flexibly configured and expanded according to actual needs to adapt to the logistics needs of different scales and complexities.

[0089] In some embodiments, the track unit 211 further includes a transportation section 2111 for the carrier 310 to pass through, and the buffer section 2112 is located between the transportation section 2111 and the lifting device 400.

[0090] In some embodiments, a sorting conveyor line 220 is further included, which is disposed on the side of the track unit 211. The track unit 211 includes a transportation section 2111 and a buffer section 2112. The transportation section 2111 faces the goods output port of the sorting conveyor line 220, and the buffer section 2112 is located between the transportation section 2111 and the lifting device 400. The buffer section 2112 is used to park the carrier vehicle 310. For example, the track unit 211 has four layers, and both the transportation section 2111 and the buffer section 2112 are located on the bottom layer of the track unit 211. Alternatively, both the transportation section 2111 and the buffer section 2112 are provided on each of the four layers of the track unit 211.

[0091] Exemplarily, when the sorting system is operating, one carrier vehicle 310 is parked in the buffer section 2112, and one carrier vehicle 310 is disposed on the transportation section 2111 and is close to the output port of the sorting conveyor line 220.

[0092] The carrier vehicle 310 in the embodiment of the present utility model has a relatively strong goods sorting ability.

[0093] In some embodiments, the sorting system further includes a control device 600. A code reading camera 224 is provided on the first section of the conveyor line 221. The code reading camera 224 is communicatively connected to the control device 600. The code reading camera 224 is mounted above the first section of the conveyor line 221 by the first rack 700, and is used to scan the identification code on the goods to obtain the material information, and send the material information to the control device 600. The control device 600 performs mapping and reading according to the information database pre-established by the backend system, and then issues corresponding sorting tasks to the sorting execution robot, so as to place the goods in the corresponding storage unit 110.

[0094] In some embodiments, a sliding contact wire 230 is further arranged on the sorting track 210 to supply power to the sorting system. The sliding contact wire 230 includes a guide rail and a sliding contactor. The guide rail is fixed to the sorting track 210, and the sliding contactor is installed on the carrier vehicle 310 of the sorting execution robot. When the carrier vehicle 310 moves along the track, the sliding contactor remains in contact with the guide rail, so as to achieve continuous power supply.

[0095] In some embodiments, the lifting device 400 includes two synchronously rotating rotary lifting mechanisms 410 and a first drive assembly 430, and the two rotary lifting mechanisms 410 are arranged at intervals to form a first channel; the first drive assembly 430 includes two first driving members, each of which is driven and connected to a rotary lifting mechanism 410 to lift the transport vehicle 310 that enters the lifting plate assembly 420 through the first channel; and / or, the lowering device 500 includes two synchronously rotating rotary lowering mechanisms and a second drive assembly, and the two rotary lowering mechanisms are arranged at intervals to form a second channel; the second drive assembly includes two second driving members, each of which is driven and connected to a rotary lowering mechanism to drive the transport vehicle 310 that enters the rotary lowering mechanism through the second channel to descend.

[0096] Exemplarily, the first driving member is a first driving motor 431, and the second driving member is a second driving motor. In this way, the two driving members drive the rotary lifting mechanism 410 and the two driving members drive the rotary descending mechanism to realize the dual-power drive of the lifting device 400 and the descending device 500, which is more efficient than the single-power drive. Moreover, compared with the reversing mechanism provided on the single lifting mechanism, the transport vehicle 310 of this embodiment is more efficient in moving and transporting goods between the lifting device 400 and the descending device 500.

[0097] In some embodiments, the lifting device 400 includes two synchronously rotating rotary lifting mechanisms 410 and a third drive assembly, and the two rotary lifting mechanisms 410 are arranged at intervals to form a first channel; the third drive assembly includes a third drive member and a first reversing member, and the first reversing member is transmission-connected between the third drive member and the rotary lifting mechanism 410, and the third drive member and the first reversing member cooperate to drive the rotary lifting mechanism 410; and / or, the descending device includes two synchronously rotating rotary descending mechanisms and a fourth drive assembly, and the two rotary descending mechanisms are arranged at intervals to form a second channel; the fourth drive assembly includes a fourth drive member and a second reversing member, and the second reversing member is transmission-connected between the fourth drive member and the rotary descending mechanism, and the fourth drive member and the second reversing member cooperate to drive the rotary descending mechanism.

[0098] Exemplarily, the first reversing member and the second reversing member each include two reversing reducers, a transmission shaft and two transmission gears. The two reversing reducers are respectively connected to the two rotary lifting mechanisms 410. The third driving member and the fourth driving member are both driving motors. The reversing reducers have reversing gears. The output shaft of the driving motor drives the transmission shaft, and the transmission shaft is connected to the reversing gear through the transmission gear. Such a drive transmission structure design has a compact structure and efficient transmission.

[0099] In some embodiments, the lifting device 400 further includes a lifting plate assembly 420 for carrying the carrier truck 310. Along the height direction of the rotary lifting mechanism 410, a plurality of lifting plate assemblies 420 are arranged at intervals on the rotary lifting mechanism 410, and the lifting plate assemblies 420 on two rotary lifting mechanisms 410 are arranged oppositely. The distance between adjacent pairs of lifting plate assemblies 420 is equal to the distance between adjacent two layers of track units 211; and / or, the lowering device 500 further includes a lowering plate assembly for carrying the carrier truck 310. Along the height direction of the rotary lowering mechanism, a plurality of lowering plate assemblies are arranged at intervals on the rotary lowering mechanism, and the lowering plate assemblies on two rotary lowering mechanisms are arranged oppositely. The distance between adjacent pairs of lowering plate assemblies is equal to the distance between adjacent two layers of track units 211.

[0100] Thus, by lifting and lowering the carrier truck 310 through the lifting plate assembly 420 and the lowering plate assembly, the moving stability of the carrier truck 310 in the first channel and the second channel is improved. Moreover, the lifting plate assembly 420 and the lowering plate assembly are respectively arranged corresponding to each layer of track unit 211, which facilitates the carrier truck 310 to stop layer by layer and move the goods to the storage unit on each layer, ensuring the goods transportation efficiency.

[0101] In some embodiments, the rotary lifting mechanism 410 includes a first rotary belt 411, a first transmission pulley 412 and a first rotating shaft 413. Along the belt length direction of the first rotary belt 411, a plurality of lifting plate assemblies 420 are arranged at intervals on each first rotary belt 411, and the lifting plate assemblies 420 on two first rotary belts 411 are arranged oppositely. The first rotary belt 411 is sleeved on the first transmission pulley 412, the first transmission pulley 412 is drivingly connected to the first rotating shaft 413, and the first driving assembly 430 includes two first driving motors 431, and the output end of the first driving motor 431 is rotationally connected to the first rotating shaft 413.

[0102] The rotary lowering mechanism includes a second rotary belt, a second transmission pulley and a second rotating shaft. Along the length direction of the second rotary belt, a plurality of lowering plate assemblies are arranged at intervals on each second rotary belt, and the lowering plate assemblies on two second rotary belts are arranged oppositely. The second rotary belt is sleeved on the second transmission pulley, the second transmission pulley is drivingly connected to the second rotating shaft, and the second driving assembly includes two second driving motors, and the output end of the second driving motor is drivingly connected to the second rotating shaft.

[0103] In some embodiments, the first driving motor 431 is connected to the first rotating shaft 413 through a coupling 432, and / or, the second driving motor is connected to the second rotating shaft through a coupling 432, improving the reliability and stability of the transmission system. Further, a reversing speed reducer is also connected to the first driving motor 431 and / or the second driving motor to further optimize the performance of the transmission system.

[0104] In some embodiments, a control device 600 is further included. The lifting device 400 includes at least one first rack 700. Two rotary lifting mechanisms 410 are spaced apart on the first rack 700. For example, two rotary lifting mechanisms 410 are spaced apart on one first rack 700 to form a first channel. At least two first zero-position sensors 721 are provided on the first rack 700. The heights of the two first zero-position sensors 721 on the first rack 700 are the same as the height of one of the layers in the track unit 211. Both the first zero-position sensors 721 and the rotary lifting mechanisms 410 are communicatively connected to the control device 600. The lifting plate assembly is provided with a first zero-position trigger. In response to the first zero-position sensors 721 detecting the first zero-position trigger, a stop signal is sent to the control device 600 to control the rotary lifting mechanisms 410 to stop rotating, so that the carrier 310 can drive into or out of the first channel.

[0105] The lowering device includes at least one second rack. Two rotary lowering mechanisms are spaced apart on the second rack. For example, two rotary lowering mechanisms are spaced apart on one second rack to form a second channel. At least two second zero-position sensors are provided on the second rack. The heights of the two second zero-position sensors on the first rack 700 are the same as the height of one of the layers in the track unit 211. Both the second zero-position sensors and the rotary lowering mechanisms are communicatively connected to the control device 600. The lowering plate assembly is provided with a second zero-position trigger. In response to the second zero-position sensors detecting the second zero-position trigger, a stop signal is sent to the control device 600 to control the rotary lowering mechanisms to stop rotating, so that the carrier 310 can drive into or out of the second channel.

[0106] In this way, through the cooperation of the first zero-position trigger provided on the lifting plate assembly 420 and the first zero-position sensors 721 on the first rack 700, the rotation of the rotary lifting mechanisms 410 is controlled to stop, and the lifting plate assembly 420 stops to receive the carrier 310, realizing docking layer by layer, ensuring the efficiency of multiple carriers 310 entering the lifting device. Moreover, for the design of the height of the zero-position sensors on the rack, the movement consistency and stability of the rotary lifting mechanisms and the rotary lowering mechanisms can be further ensured.

[0107] Exemplarily, the first zero-position sensors 721 are photoelectric sensors, and both the first zero-position trigger 421 and the second zero-position trigger are trigger blocks. In another example, the first zero-position sensors 721 are proximity sensors or fiber optic sensors. In this way, the cooperation between the trigger blocks and the sensors can ensure that the two lifting plates 422 stop at the same height each time, so as to ensure that the carrier 310 maintains a relatively stable rising state in the lifting device 400.

[0108] In some embodiments, the first rack 700 includes a chassis 710 and two support frames 720. Along the length direction perpendicular to the sorting track 210, the two support frames 720 are erected on the chassis 710 at intervals. The support frames 720 of the two first racks 700 are respectively used to install the rotary lifting mechanism 410 and the rotary lowering mechanism.

[0109] In other possible embodiments, first zero position sensors 721 are oppositely arranged on the two support frames 720. The first zero position sensors 721 are arranged close to the bottom ends of the support frames 720. The first zero position sensors 721 are signal-connected to the control device 600. The lifting plate assembly 420 is provided with a first zero position trigger 421. When the first rotary belt 411 drives the lifting plate assembly 420 close to the first zero position sensor 721, the first zero position trigger 421 triggers the first zero position sensor 721 to send a stop signal to the control device 600 to control the first rotary belt 411 to stop rotating, so that the carrier 310 on the bottom-layer track unit 211 can drive into the lifting plate assembly 420.

[0110] Furthermore, it can be improved that the first zero position sensor 721 is fixed to the support frame 720 through a fixing bracket 724, which improves the convenience of disassembly and assembly of the first zero position sensor 721 on the support frame 720 and the connection stability between the two.

[0111] With such a setting, through the cooperation of the first zero position trigger provided on the lowering plate assembly and the zero position sensor on the rack, the rotary lowering mechanism is controlled to stop rotating, the lowering plate assembly docks to receive the carrier, and layer-by-layer docking is achieved, ensuring the efficiency of multiple carriers entering the lowering device.

[0112] In some embodiments, the control device 600 is communicatively connected to the lifting device 400, the lowering device 500, and the carrier 310. The lifting plate assembly 420 includes a first in-place trigger 424. The lifting device 400 is provided with a first in-place sensor 723. The carrier 310 is provided with a second in-place sensor 3111 and a second in-place trigger 3112. In response to the second in-place sensor 3111 detecting the first in-place trigger 424, a first in-place signal is sent to the control device 600 to control the carrier 310 to stop. In response to the first in-place sensor 723 detecting the second in-place trigger 3112, a second in-place signal is sent to the control device 600 to control the lifting device 400 to drive the carrier 310 to rise.

[0113] And / or, the descending plate assembly includes a third in-position trigger, a third in-position sensor is provided on the descending device 500, and a fourth in-position sensor and a fourth in-position trigger are provided on the transport vehicle 310; in response to the fourth in-position sensor detecting the third in-position trigger, a third in-position signal is sent to the control device 600 to control the transport vehicle 310 to stop; in response to the third in-position sensor detecting the fourth in-position trigger, a fourth in-position signal is sent to the control device 600 so that the control device 600 controls the descending device 500 to drive the transport vehicle 310 to descend.

[0114] Therefore, the parking and rising functions of the transport vehicle after entering the lifting plate assembly 420 are realized through the cooperation of the first in-place trigger member 424 and the second in-place sensor 3111, as well as the second in-place trigger member 3112 and the first in-place sensor 723. The transport vehicle 310 and the lifting device 400 each independently determine whether they are in place, and there is no need to go through the control device 600 to adjust the trigger instructions in steps. Similarly, the parking and lowering functions of the transport vehicle after entering the lowering plate assembly are realized through the cooperation of the third in-place trigger member and the fourth in-place sensor, as well as the fourth in-place trigger member and the third in-place sensor.

[0115] By arranging a group of in-position detection sensors on the lifting device 400, the descending device 500 and the transport vehicle 310, the information exchange between the lifting device 400 and the transport vehicle 310 and between the descending device 500 and the transport vehicle 310 is reduced, thereby reducing the waiting time caused by the lifting and lowering logic judgment of the lifting device 400 and the descending device 500, thereby improving the operating efficiency of the sorting system.

[0116] In this embodiment, the support frame 720 is provided with a guide groove 722; the lifting plate assembly 420 includes a lifting plate 422 and a lifting guide wheel group 423, the lifting plate 422 is transmission-connected to the first rotating belt 411, and the lifting plate 422 is slidingly connected to the guide groove 722 through the guide wheel group.

[0117] The lifting plate 422 is provided with a first in-position trigger member 424, for example, the first in-position trigger member 424 is a sensor trigger baffle, and the first in-position trigger member 424 extends toward the side away from the support frame 720; the support frame 720 is provided with a first in-position sensor 723, and the first in-position sensor 723 faces the track unit 211. Further, the lifting guide wheel group 423 includes a first guide wheel 4231 and a second guide wheel 4232, and the guide groove 722 includes a first guide groove 7221 and a second guide groove 7222, wherein the first guide groove 7221 and the second guide groove 7222 correspond to the first guide wheel 4231 and the second guide wheel 4232 respectively, and extend along the height direction and the horizontal direction of the support frame 720 respectively, so as to balance the torque on the first rotating belt 411 and extend the service life of the component.

[0118] In some embodiments, the transport vehicle 310 is provided with an in-place lifting sensor assembly 311 and an in-place lowering sensor assembly, which are respectively arranged on both sides of the transport vehicle 310 along its own moving direction, and the in-place lifting sensor assembly 311 and the in-place lowering sensor assembly each include a second in-place sensor 3111 and a second in-place trigger 3112, which are respectively arranged at both ends of the transport vehicle 310. Therefore, the transport vehicle 310 can utilize the in-place lifting sensor assembly and the in-place lowering sensor assembly arranged on both sides of itself to cooperate with the lifting device and the lowering device to sense interactive signals without turning, so as to realize the parking and lifting and lowering movement of the vehicle body.

[0119] In some embodiments, the descending plate assembly includes a descending plate and a descending guide wheel group, the descending plate is transmission-connected to the first rotating belt 411, and the descending plate is slidingly connected to the guide groove 722 through the descending guide wheel group; the descending plate is provided with a first in-position trigger member 424, for example, the first in-position trigger member 424 is a sensor trigger baffle, and the first in-position trigger member 424 extends toward the side away from the support frame 720; the support frame 720 is provided with a first in-position sensor 723, and the first in-position sensor 723 faces the track unit 211, and further, the descending guide wheel group includes a first guide wheel 4231 and a second guide wheel 4232, and the guide groove 722 includes a first guide groove 7221 and a second guide groove 7222, wherein the first guide groove 7221 and the second guide groove 7222 correspond to the first guide wheel 4231 and the second guide wheel 4232 respectively, and extend along the height direction and the horizontal direction of the support frame 720 respectively, so as to balance the torque on the second rotating belt and extend the service life of the component.

[0120] As a possible implementation, in the lifting device 400, the first in-position sensor 723 is arranged near the bottom of the first frame 700 and opposite to the bottom layer of the track unit 211. In response to detecting the second in-position trigger, a second in-position signal is sent to the control device 600 to control the transport vehicle 310 to rise to any layer of the track unit 211.

[0121] And / or, in the descending device 500, a plurality of third in-position sensors are arranged at intervals along the height direction of the second frame, and are arranged corresponding to the rail units 211 layer by layer except the bottom rail unit 211, and in response to detecting the fourth in-position trigger, a fourth in-position signal is sent to the control device 600 to control the transport vehicle 310 to descend to the bottom rail unit 211.

[0122] Thus, each transport vehicle 310 can be controlled to enter from the bottom layer of the lifting device 400, rise to any target layer and exit; and each transport vehicle 310 can be controlled to enter from any layer of the descending device except the bottom layer, descend to the bottom layer and exit, thereby preventing driving conflicts of the transport vehicles 310 on each layer and ensuring efficient and stable operation of the system.

[0123] In some embodiments, the sorting system further includes a first overrun sensor 741. Two first overrun sensors 741 are spaced apart on the first rack 700. One of the first overrun sensors 741 is located between the bottom end of the first rack 700 and the first in-place sensor 723, and the other first overrun sensor 741 is disposed near the top end of the first rack 700. In response to the first overrun sensor 741 detecting the second in-place trigger, an alarm signal is issued to indicate that the carrier vehicle 310 has exceeded its own moving distance range.

[0124] And / or, it further includes a second overrun sensor. Two second overrun sensors are spaced apart on the second rack. One of the second overrun sensors is located between the bottom end of the second rack and the third in-place sensor, and the other second overrun sensor is disposed near the top end of the second rack. In response to the second overrun sensor detecting the fourth in-place trigger, an alarm signal is issued to indicate that the carrier vehicle 310 has exceeded its own moving distance range.

[0125] Thus, overrun sensors are respectively provided at both ends in the height direction of the rack, which can respond to the alarm in time when the lifting device or the lowering device fails and drives the carrier vehicle to move in the reverse direction, enabling the staff to take an emergency stop measure for the lifting device or the lowering device to prevent structural damage to the lifting device, the lowering device or the carrier vehicle.

[0126] Exemplarily, the first rack 700 further includes a first cross beam 730 and a first column 740. The first cross beam 730 is connected between two support frames 720. The first column 740 is connected between the first cross beam 730 and the chassis. The first in-place sensor 723 is provided on the first column 740. The overrun sensor 741 is provided on the first column 740. Two overrun sensors 741 are respectively located on the side walls near the ends of the first column 740 and between the first in-place sensor 723 and the ends of the first column 740. The overrun sensor 741 is used to be triggered by the first in-place trigger to send an alarm signal to indicate that the carrier vehicle 310 has exceeded its own rising or falling distance range.

[0127] In some embodiments, the transporter 310 includes a vehicle body 312 and traveling wheels 313, and the traveling wheels 313 are installed at the bottom of the vehicle body 312; a blocking member 4221 is provided on the lifting plate 422, and the blocking member 4221 is arranged at one end of the lifting plate 422 away from the sorting track 210. The blocking member 4221 is used to block the traveling wheels 313 to limit the movement of the vehicle body 312, and / or a blocking member 4221 is provided on the lowering plate. The blocking member 4221 is arranged at one end of the lowering plate away from the sorting track 210, and the blocking member 4221 is used to block the traveling wheels 313 to limit the movement of the vehicle body 312. Further, the traveling wheels 313 include first traveling wheels 313 and limiting wheels 315. Four first traveling wheels 313 are provided at the bottom of the vehicle body 312 for traveling on the track unit 211, and the orientation of the first traveling wheels 313 is parallel to the track unit 211. The limiting wheels 315 are installed at the bottom of the vehicle body 312 and are respectively arranged in one-to-one correspondence with the first traveling wheels 313 and are located on the sides of the first traveling wheels 313 to cooperate with the limiting baffles provided on the lifting plate 422 or the lowering plate to limit the transporter 310 after it enters the lifting plate 422, thereby improving the stability of the lifting device 400 and the lowering device 500 in transporting the trolley.

[0128] In some embodiments, the sorting system further includes at least two sorting conveyor lines 220; the sorting conveyor lines 220 are spaced apart on one side of the track unit 211, or the sorting conveyor lines 220 are spaced apart on both sides of the track unit 211.

[0129] For example, two sorting conveyor lines 220 are provided. Two transporters 310 are correspondingly arranged on the track units 211 of the two sorting conveyor lines 220. Along the length direction of the track unit 211, the two sorting conveyor lines 220 are spaced apart on one side of the bottom layer of the multi-layer track unit 211. Or, four sorting conveyor lines 220 are provided. Along the width direction of the track unit 211, the sorting conveyor lines 220 are arranged in pairs on both sides of the bottom layer of the multi-layer track unit 211, and the two sorting conveyor lines 220 on each side are spaced apart.

[0130] Thus, from the perspective of the overall layout of the sorting solution, sorting conveyor lines 220 (feeding lines) are provided on both sides of the sorting track 210, significantly improving the efficiency of sorting items.

[0131] In some embodiments, along the width direction of the track unit 211, the two sorting conveyor lines 220 are respectively located on both sides of the bottom layer of the multi-layer track unit 211. For example, three transporters 310 are provided. One transporter 310 stops at the buffer section 2112, one transporter 310 is arranged in the transportation section 2111 and is close to the output port of the sorting conveyor line 220 on one side of the bottom track unit 211, and the other transporter 310 is close to the output port of the sorting conveyor line 220 on the other side of the bottom track unit 211.

[0132] In some embodiments, the sorting system further includes a control device 600. The sorting conveyor line includes at least three sequentially connected conveying sections, and the conveying sections are signal-connected to the control device 600. The control device 600 can independently control the working states of each conveying section. The conveying section located in the first section is used for receiving the goods to be put in. The conveying section located in the second section is used for transporting the goods to the transporter 310, and at least one conveying section between the first section and the second section is used for temporarily storing the goods.

[0133] Exemplarily, the sorting conveyor line 220 includes a first-section conveyor line 221, a second-section conveyor line 222, and a third-section conveyor line 223 that are sequentially connected. The first-section conveyor line 221, the second-section conveyor line 222, and the third-section conveyor line 223 are all signal-connected to the control device 600. The control device 600 can independently control the working states of the first-section conveyor line 221, the second-section conveyor line 222, and the third-section conveyor line 223. Further, conveyor belts are respectively arranged on the first-section conveyor line 221, the second-section conveyor line 222, and the third-section conveyor line 223 to increase the static friction force between the conveyor line and the goods.

[0134] By setting the sorting conveyor line 220 to be divided into three conveying workstations, the staff places the items to be sorted on the first-section conveyor line 221. Under the transportation of the belt conveyor line, the items sequentially pass through the second-section conveyor line and the third-section conveyor line 223 and reach the conveyor belt 314 on the transporter 310. In this way, the problems of abnormal rhythm of the staff placing items and the reduction of sorting efficiency caused by the execution robots gathering and waiting to dock with the conveyor line are avoided.

[0135] In this specification, the embodiments or implementation manners are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0136] It should be noted that the embodiments referred to in the specification, such as "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc., may include specific features, structures or characteristics, but not necessarily every embodiment includes the specific feature, structure or characteristic. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when combining an embodiment to describe a specific feature, structure or characteristic, it is within the knowledge scope of those skilled in the art to implement such a feature, structure or characteristic in combination with other embodiments, whether explicitly or implicitly described.

[0137] In general, terms should be understood, at least in part, in light of their use in the context. For example, at least in part depending on the context, the term "one or more" as used herein can be used to describe any feature, structure, or property in the sense of a singular, or can be used to describe a combination of features, structures, or properties in the sense of a plural. Similarly, at least in part depending on the context, terms such as "a" or "an" can also be understood as conveying a singular usage or conveying a plural usage.

[0138] In addition, spatial relative terms may be used herein for convenience of description, e.g., "below", "beneath", "under", "above", "over", etc., to describe the relationship of one element or feature to another as shown in the figures. Spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures.

[0139] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sorting system, characterized in that, It comprises a shelf, a sorting track, at least one transport vehicle, a lifting device and a lowering device; the shelf has at least two layers of storage units for storing goods; the sorting track comprises at least two layers of track units, and corresponds to the at least two layers of storage units layer by layer; The lifting device and the lowering device are located on both sides of the sorting track, and are used to lift or lower the transport vehicle to the track unit corresponding to the target layer; the transport vehicle moves on the track unit and transports the goods to the corresponding storage unit; The track unit includes a buffer section, which is arranged on one side of the lifting device and is used to park the transport vehicle.

2. The sorting system according to claim 1, wherein The lifting device comprises two synchronously rotating rotary lifting mechanisms and a first driving assembly, wherein the two rotary lifting mechanisms are arranged at intervals to form a first channel; The first driving assembly includes two first driving members, each of which is drivingly connected to one of the rotary lifting mechanisms to lift the transport vehicle that passes through the first passage and enters the lifting plate assembly; And / or, the descending device comprises two synchronously rotating rotary descending mechanisms and a second driving assembly, and the two rotary descending mechanisms are arranged at intervals to form a second channel; The second driving assembly includes two second driving members, each of which is drivingly connected to one of the rotary descending mechanisms to drive the transport vehicle that passes through the second channel and enters the rotary descending mechanism to descend.

3. The sorting system according to claim 1, wherein The lifting device comprises two synchronously rotating rotary lifting mechanisms and a third driving assembly, wherein the two rotary lifting mechanisms are arranged at intervals to form a first channel; the third driving assembly comprises a third driving member and a first reversing member, wherein the first reversing member is transmission-connected between the third driving member and the rotary lifting mechanism, and the third driving member and the first reversing member cooperate to drive the rotary lifting mechanism; And / or, the descending device includes two synchronously rotating rotary descending mechanisms and a fourth drive assembly, and the two rotary descending mechanisms are arranged at intervals to form a second channel; the fourth drive assembly includes a fourth driving member and a second reversing member, and the second reversing member is transmission-connected between the fourth driving member and the rotary descending mechanism, and the fourth driving member and the second reversing member cooperate to drive the rotary descending mechanism.

4. The sorting system according to claim 2 or 3, characterized in that, The lifting device further comprises a lifting plate assembly for carrying the transport vehicle, and along the height direction of the rotary lifting mechanism, a plurality of the lifting plate assemblies are arranged at intervals on the rotary lifting mechanism, and the lifting plate assemblies on the two rotary lifting mechanisms are arranged oppositely, and the distance between two adjacent pairs of the lifting plate assemblies is equal to the distance between two adjacent layers of the track units; And / or, the descending device also includes a descending plate assembly for carrying the transport vehicle, and along the height direction of the rotary descending mechanism, a plurality of the descending plate assemblies are arranged at intervals on the rotary descending mechanism, and the descending plate assemblies on the two rotary descending mechanisms are arranged opposite to each other, and the distance between two adjacent pairs of the descending plate assemblies is equal to the distance between two adjacent layers of the track units.

5. The sorting system according to claim 4, characterized in that, It further includes a control device. The lifting device includes at least one first frame, and the two rotary lifting mechanisms are spaced apart on the first frame to form the first channel. At least two first zero-position sensors are provided on the first frame, and both the first zero-position sensors and the rotary lifting mechanisms are communicatively connected to the control device. The lifting plate assembly is provided with a first zero-position trigger. In response to the first zero-position sensor detecting the first zero-position trigger, a stop signal is sent to the control device to control the rotary lifting mechanism to stop rotating, so that the carrier can drive into or out of the first channel. And / or, the lowering device includes at least one second frame, and the two rotary lowering mechanisms are spaced apart on the second frame to form the second channel. At least two second zero-position sensors are provided on the second frame, and both the second zero-position sensors and the rotary lowering mechanisms are communicatively connected to the control device. The lowering plate assembly is provided with a second zero-position trigger. In response to the second zero-position sensor detecting the second zero-position trigger, a stop signal is sent to the control device to control the rotary lowering mechanism to stop rotating, so that the carrier can drive into or out of the second channel.

6. The sorting system according to claim 5, characterized in that, The control device is communicatively connected to the lifting device, the lowering device and the carrier. The lifting plate assembly includes a first in-place trigger. A first in-place sensor is provided on the lifting device, and a second in-place sensor and a second in-place trigger are provided on the carrier. In response to the second in-place sensor detecting the first in-place trigger, a first in-place signal is sent to the control device to control the carrier to stop. In response to the first in-place sensor detecting the second in-place trigger, a second in-place signal is sent to the control device to control the lifting device to drive the carrier to rise. And / or, the lowering plate assembly includes a third in-place trigger. A third in-place sensor is provided on the lowering device, and a fourth in-place sensor and a fourth in-place trigger are provided on the carrier. In response to the fourth in-place sensor detecting the third in-place trigger, a third in-place signal is sent to the control device to control the carrier to stop. In response to the third in-place sensor detecting the fourth in-place trigger, a fourth in-place signal is sent to the control device to enable the control device to control the lowering device to drive the carrier to lower.

7. The sorting system according to claim 6, wherein The first in-place sensor is disposed near the bottom of the first frame and is opposite to the bottom-layer track unit. In response to detecting the second in-place trigger, a second in-place signal for controlling the carrier to rise to any layer of the track unit is sent to the control device. And / or, a plurality of the third in-place sensors are spaced apart along the height direction of the second frame and are arranged in layer-by-layer correspondence with the track units except the bottom-layer track unit. In response to detecting the fourth in-place trigger, a fourth in-place signal for controlling the carrier to lower to the bottom-layer track unit is sent to the control device.

8. The sorting system according to claim 6, wherein It further includes a first overrun sensor. The two first overrun sensors are arranged at intervals on the first rack. One of the first overrun sensors is located between the bottom end of the first rack and the first in-place sensor, and the other first overrun sensor is arranged near the top end of the first rack. In response to the first overrun sensor detecting the second in-place trigger, an alarm signal is sent to indicate that the forklift has exceeded its own moving distance range. And / or, it further includes a second overrun sensor. The two second overrun sensors are arranged at intervals on the second rack. One of the second overrun sensors is located between the bottom end of the second rack and the third in-place sensor, and the other second overrun sensor is arranged near the top end of the second rack. In response to the second overrun sensor detecting the fourth in-place trigger, an alarm signal is sent to indicate that the forklift has exceeded its own moving distance range.

9. The sorting system according to claim 1, wherein It further includes at least two sorting conveyor lines; The sorting conveyor lines are arranged at intervals on one side of the track unit, or the sorting conveyor lines are arranged at intervals on both sides of the track unit.

10. The sorting system according to claim 9, characterized in that, It further includes a control device. The sorting conveyor line includes at least three sequentially connected conveying sections, and the conveying sections are signal-connected to the control device; The control device can independently control the working state of each conveying section; The conveying section in the first segment is used for receiving goods delivery; the conveying section in the second segment is used for transporting the goods to the forklift; at least one conveying section between the first segment and the second segment is used for temporarily storing goods.

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