Container conveying device and conveying method for first-in first-out repository

Abstract

The invention provides a container conveying device and method for a first-in first-out storage warehouse, belongs to the technical field of material caching, and aims to solve the problem that an existing warehouse type first-in first-out system cannot guarantee absolute first-in first-out of all containers in each group of trays stored in the warehouse. The device comprises a full box conveyor, a full box temporary storage conveyor and a shifting mechanism. Wherein the shifting mechanism is arranged above the full box conveyor and the full box temporary storage conveyor; the full box conveyor conveys a container full of materials to the position below the first position of the shifting mechanism in the first direction in the horizontal plane. The shifting mechanism is used for transferring the single containers on the full box conveyor below the first position of the shifting mechanism to the full box temporary storage conveyor; the full box temporary storage conveyor conveys the containers on the full box temporary storage conveyor in the horizontal plane in the second direction; wherein the width direction of the conveyed container is in the first direction, and the second direction is parallel to the first direction and opposite to the first direction. Absolute first-in first-out of cached materials can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of material buffering, and in particular to a container conveying device and a conveying method for a first-in-first-out storage bin. Background Art

[0002] During the material production process, a cache device is often added between the upstream production machine and the downstream packaging machine to coordinate the upstream and downstream production speeds and ensure the continuous operation of the production line. Commonly used material cache devices are usually based on a first-in-last-out method. For example, the method for conveying and transferring stick-shaped objects provided in Chinese patent CN 201810984683.7 is a first-in-last-out cache method. However, in some production fields, the first-in-last-out cache method can no longer meet product quality requirements. For example, for time-sensitive materials such as cigarettes, a first-in-first-out (first-input cache device material is output first) cache method is more needed.

[0003] In order to meet the first-in-first-out storage requirements of materials, a first-in-first-out material storage method in the form of a storage library is proposed in the prior art. Figure 1 The figure shows the structural diagram of the existing library-type first-in-first-out storage system. Figure 1 The system mainly includes an input device 11, a manipulator 12, a storage 13 and an output device 14, wherein the conveying directions of the input device 11 and the output device 14 are as follows: Figure 1 After the input device 11 outputs the tray 15 filled with materials, the robot 12 on the left stores multiple trays 15 as a group into the storage 13. When the materials in the storage are needed, the robot 12 on the right takes out the first group of trays 15 stored in the storage according to the first-in-first-out principle and transfers them to the output device 14 for output. Figure 1 As shown in FIG. 1 , if the serial numbers ①②③④……are used to represent the numbers of the pallets 15 outputted sequentially by the input device 11, and assuming that three material pallets 15 are grouped together, the group of pallets 15 numbered ①②③ outputted sequentially by the input device 11 is first transferred by the left manipulator 12 to a shelf on the storage 13 ( Figure 1 Then, the group of pallets 15 numbered ④⑤⑥ output by the input device 11 is transferred by the robot 12 on the left side to another shelf on the storage 13 ( Figure 1 When the storage is required to provide materials, according to the first-in-first-out principle, the robot 12 on the right first takes out the group of trays 15 numbered ①②③ and transfers them to the output device 14. Figure 1 As shown in , although the group of pallets 15 of ①②③ that were first put into the warehouse are output first, the materials in this group of pallets are not output in a first-in-first-out manner but in a first-in-last-out manner.

[0004] because Figure 1 The system shown is usually large in layout, but the space in the production workshop is limited, and the production line equipment is closely connected. In order to save space, the manipulator in this first-in-first-out storage system generally transfers the pallet by translation to put the pallet group in or out of the warehouse, that is, the order of the pallets in each group of pallets will not be changed when entering or leaving the warehouse, such as Figure 1 As shown in , this results in the last produced material pallet being shipped out first in a group of pallets shipped out. To solve this problem, if the robot is designed to be able to reverse 180° to achieve absolute first-in-first-out of materials in each group of pallets, the robot structure will be larger, and a reversing work link will be added, which will reduce the storage work efficiency. It is also necessary to pre-process the stored pallets for reorientation / sorting, and the system design is relatively complicated. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides a container conveying device and conveying method for a first-in-first-out storage warehouse, which is used to solve the problem that the existing warehouse-type first-in-first-out system cannot guarantee that all containers in each group of pallets stored in the warehouse are absolutely first-in-first-out, and the use of a manipulator with a reversing function will cause the system to occupy a large area and have a complex system structure.

[0006] In a first aspect, an embodiment of the present disclosure provides a container conveying device for a first-in-first-out storage, comprising: a full box conveyor, a full box buffer conveyor, and a shifting mechanism; wherein the shifting mechanism is arranged above the full box conveyor and the full box buffer conveyor; The full box conveyor is used to convey a container filled with materials in a horizontal plane along a first direction to below a first position of the shift mechanism; wherein the width direction of the conveyed container is along the first direction; The shifting mechanism is used to shift a single container on the full box conveyor below its first position to the full box buffer conveyor; The full box buffer conveyor is used to convey the containers thereon along a second direction in a horizontal plane, and the second direction is parallel to and opposite to the first direction.

[0007] In some embodiments, the shifting mechanism includes: a horizontally moving electric cylinder, a vertically lifting cylinder, a mounting plate, and a grabbing member; The guiding direction of the horizontal moving electric cylinder is horizontal and perpendicular to the first direction; The vertical lifting cylinder is installed on the moving slide of the horizontal moving electric cylinder, and the push rod of the vertical lifting cylinder is arranged in the vertical direction; The mounting plate is connected to the push rod, and grabbing pieces are symmetrically mounted at both ends of the mounting plate; The grabbing member is used to grab the outer side wall of the container so that when the push rod of the vertical lifting cylinder rises, the grabbed container is lifted through the mounting plate and the grabbing member.

[0008] In some embodiments, horizontal grooves are provided on two outer side walls in the length direction of the container; the grabbing member is a lifting plate, and the lifting plate is in the shape of a C-shaped groove opening downward.

[0009] In some embodiments, the full box buffer conveyor includes a second frame, a second conveyor belt assembly and a limit piece; the second conveyor belt assembly is installed on the second frame, and the length direction of the second conveyor belt of the second conveyor belt assembly is along the second direction; the limit piece is fixedly installed at one end of the conveying direction of the second conveyor belt assembly.

[0010] In some embodiments, the full box buffer conveyor is also used to output the m containers thereon as a group along the first direction in a horizontal plane when the number of containers buffered thereon reaches a preset number m; wherein m is a positive integer greater than or equal to 2.

[0011] In a second aspect, an embodiment of the present disclosure provides a container conveying method for a first-in-first-out storage system, the method comprising: Step S1: The full box conveyor conveys the nth container filled with materials in a horizontal plane along a first direction to below the first position of the shift mechanism, and then the shift mechanism moves from a preset second position to the first position; wherein the initial value of n is 1; Step S2: the shifting mechanism transfers the nth container on the full box conveyor located below the first position to the full box buffer conveyor, and the full box conveyor conveys the n+1th container filled with materials in the first direction in the horizontal plane; Step S3: when the full box conveyor conveys the n+1th container to below the first position, the shifting mechanism returns to the first position; Step S4: The full box buffer conveyor conveys the nth container along the second direction in the horizontal plane, then sets n=n+1 and returns to execute step S2; wherein the second direction is parallel to and opposite to the first direction.

[0012] In some embodiments, in step S4, the full box buffer conveyor conveys the nth container in the second direction in the horizontal plane, specifically including: The full box buffer conveyor conveys the nth container in a horizontal plane along a second direction by a distance equal to the width of at least one container.

[0013] In some embodiments, horizontal grooves are provided on the two outer side walls in the length direction of the container; the shift mechanism comprises: a horizontal moving electric cylinder, a vertical lifting cylinder, a mounting plate, and a lifting plate; the guiding direction of the horizontal moving electric cylinder is horizontal and perpendicular to the first direction; the vertical lifting cylinder is mounted on the moving slide of the horizontal moving electric cylinder, and the push rod of the vertical lifting cylinder is arranged along the vertical direction; the mounting plate is connected to the push rod, and lifting plates are symmetrically mounted at both ends of the mounting plate; the lifting plate is in the shape of a C-shaped groove with an opening downward; The step S2 comprises: Step S21: the vertical lifting cylinder retracts the push rod upward, and hooks and lifts the nth container currently located below the first position through the bottom short side of the C-shaped groove of the lifting plate, so that the bottom surface of the nth container is separated from the first conveyor belt of the full box conveyor; Step S22: the moving slide of the horizontal moving electric cylinder moves horizontally by a preset distance in the direction of the full box buffer conveyor, so that the nth container reaches directly above the full box buffer conveyor; Step S23: the vertical lifting cylinder extends a push rod downward to place the nth container on the second conveyor belt of the full box buffer conveyor; The step S3 wherein the shifting mechanism returns to the first position includes: The movable slide of the horizontal movable electric cylinder moves horizontally toward the full box conveyor, driving the bottom short side of the C-shaped groove of the lifting plate connected to the mounting plate to pass through the horizontal grooves on both sides of the container until it moves to the first position.

[0014] In some embodiments, after step S4, the method further includes: Step S5: When the number of containers cached on the full-box buffer conveyor reaches a preset number m, the full-box buffer conveyor outputs the m containers thereon as a group in a horizontal plane along the first direction; wherein m is a positive integer greater than or equal to 2.

[0015] The container conveying device and conveying method of the first-in-first-out storage warehouse provided by the present invention only need to occupy a space with a width slightly larger than the length of the container to set up a full box buffer conveyor parallel to the full box conveyor, and can transfer the containers filled with materials that are continuously conveyed at equal intervals on the full box conveyor to the full box buffer conveyor through a shifting mechanism and then convey them in the reverse direction. Under the premise of not affecting the original conveying speed of the full box conveyor, the sequence of the conveyed containers can be changed, which not only enables the container group to achieve first-in-first-out, but also the individual containers in each group of containers can achieve first-in-first-out, ensuring the absolute first-in-first-out of material storage, and can ensure the timeliness of materials and the traceability of the material production line. In addition, the sequencing of the containers to be stored in advance further simplifies the structure of the downstream material picking robot, reduces the space occupied by the storage warehouse system, and improves the material caching efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural diagram of an existing library-type first-in-first-out storage system; Figure 2 A schematic structural diagram of a container conveying device for a first-in-first-out storage bin provided by an embodiment of the present invention; Figure 3 A schematic structural diagram of a shifting mechanism provided by an embodiment of the present invention; Figure 4 A flow chart of a container conveying method for a first-in-first-out storage bin provided by an embodiment of the present invention; Reference numerals: 1. Full box conveyor; 2. Full box buffer conveyor; 3. Shifting mechanism; 4. Container; 11. Input device; 12. Manipulator; 13. Storage library; 14. Output device; 15. Tray; 21. Second frame; 22. Second conveyor belt assembly; 23. Limiting member; 31. Horizontal moving electric cylinder; 32. Vertical lifting cylinder; 33. Mounting plate; 34. Lifting plate; 311. Moving slide; 321. Push rod; 41. Horizontal groove; 401. Second schematic container; 402. First schematic container. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] For convenience of explanation, Figure 2 The horizontal direction to the left along the length direction of the container 4 is defined as the left direction. Figure 2 The direction horizontally to the right along the length direction of the container 4 is defined as the right direction. Figure 1 In the direction perpendicular to the outward direction along the width direction of the container 4 ( Figure 2 The direction indicated by the arrow M in the figure is defined as the forward direction. Figure 1 In the direction perpendicular to the outward direction along the width direction of the container 4 ( Figure 2 The direction indicated by the arrow R in the figure is defined as the backward direction.

[0020] Figure 2 A structural schematic diagram of a container conveying device for a first-in-first-out storage system provided by an embodiment of the present invention is shown in FIG. Figure 2 As shown in , the device comprises: a full box conveyor 1, a full box buffer conveyor 2 and a shift mechanism 3; wherein the full box conveyor 1 and the full box buffer conveyor 2 are arranged in parallel, and the shift mechanism 3 is arranged above the full box conveyor 1 and the full box buffer conveyor 2; The full box conveyor 1 is used to convey the full box along a first direction ( Figure 2 The container 4 filled with materials is transported to below the first position of the shift mechanism 3 in the direction indicated by the arrow R in the middle; wherein the width direction of the transported container 4 is along the first direction; The shifting mechanism 3 shifts a single container 4 on the full box conveyor 1 below its first position to the full box buffer conveyor 2 each time; The full box buffer conveyor 2 is used to convey the full box along the second direction ( Figure 2 The second direction is parallel to the first direction and opposite to the first direction.

[0021] Preferably, if Figure 2 As shown in the figure, the full box buffer conveyor 2 includes a second frame 21, a second conveyor belt assembly 22 and a stopper 23; the second conveyor belt assembly 22 is installed on the frame 21, and the length direction of the second conveyor belt of the second conveyor belt assembly 22 is along the second direction; the stopper 23 is fixedly installed in the conveying direction ( Figure 2 The end of the direction indicated by the arrow M in the middle, that is, Figure 2 When the full-box buffer conveyor 2 conveys the container 4 along the second direction, the container 4 will eventually be blocked by the stopper 23 at the end of the second direction M, thereby realizing the buffering function of the full-box buffer conveyor 2 for the container 4.

[0022] Preferably, the full box buffer conveyor 2 is also used to output the m containers 4 thereon in a group along the first direction in a horizontal plane when the number of containers 4 buffered thereon reaches a preset number m, so as to be transported to a downstream conveying device docked with the full box buffer conveyor 2, and transferred to a first-in-first-out storage bin by the downstream conveying device; wherein m is a positive integer greater than or equal to 2. For example, the container conveying device provided by the present invention may also include a sensor (such as an infrared sensor) arranged on the side of the conveying direction of the full box buffer conveyor 2, the sensor being used to sense the containers 4 transported along the second direction by the full box buffer conveyor 2, and counting the number of containers 4 transported along the second direction by the full box buffer conveyor 2, and when the count value reaches the preset value m, the full box buffer conveyor 2 is triggered to transport in the reverse direction, so as to output the m containers 4 thereon in a group along the first direction in a horizontal plane, and then the count value of the sensor is cleared to restart the next round of counting.

[0023] Preferably, when the shifting mechanism 3 transfers one container 4 to the full box buffer conveyor 2 each time, the full box buffer conveyor 2 conveys the distance of the width of at least one container 4 forward in the second direction in the horizontal plane, thereby reserving a position for the next container 4 under the shifting mechanism 3 for the shifting mechanism 3 to transfer the next container 4 from the full box conveyor 1, so that multiple containers 4 transferred to the full box buffer conveyor 2 can be arranged in sequence at one time into a combination form without spacing, and there is no need to adjust the spacing between adjacent containers 4 subsequently, thereby avoiding the situation where each group of stored containers 4 moves or tip over during the entry and exit process due to the spacing between them. In this embodiment, the control system of the container conveying device of the present invention can also count the number of times the full box buffer conveyor 2 is controlled to start conveying in the second direction. Each time the full box buffer conveyor 2 is started and moves forward a distance of the width of at least one container 4 in the second direction in the horizontal plane, the count value increases by 1. When the count value reaches a preset value m, the full box buffer conveyor 2 is triggered to convey in reverse to output the m containers 4 thereon as a group in the first direction in the horizontal plane, and then the current count value is cleared to restart the next round of counting.

[0024] Figure 3 A schematic diagram of the structure of the shifting mechanism provided by an embodiment of the present invention is shown in FIG. Figure 3 As shown in , the shifting mechanism 3 includes: a horizontal moving electric cylinder 31, a vertical lifting cylinder 32, a mounting plate 33, and a grabbing member, wherein: The guide direction of the horizontal moving electric cylinder 31 is horizontal and perpendicular to the first direction. Figure 2 , the guiding direction of the horizontal moving electric cylinder 31 is the left and right direction; The vertical lifting cylinder 32 is installed on the moving slide 311 of the horizontal moving electric cylinder 31, and the push rod 321 of the vertical lifting cylinder 32 is arranged along the vertical direction; The mounting plate 33 is connected to the push rod 321, and the grabbing parts are symmetrically installed at both ends of the mounting plate 33; obviously, Figure 2 The horizontal moving electric cylinder 31 can drive the vertical lifting cylinder 32 to move left and right by moving the slide 311, and the vertical lifting cylinder 32 can lower or raise the mounting plate 33 by extending or retracting the push rod 321; The gripper is used to grip the outer wall of the container 4, so that when the push rod 321 of the vertical lifting cylinder 32 rises, the gripped container 4 is lifted through the mounting plate 33 and the gripper. For example, the gripper can be a mechanical gripper with opening and closing functions, or the gripper can be a vacuum suction cup capable of adsorbing the side wall of the container 4.

[0025] Preferably, if Figure 2 and Figure 3 As shown in the figure, horizontal grooves 41 are provided on the two outer side walls in the length direction of the container 4; the grabbing member is a lifting plate 34, which is in the shape of a C-shaped groove opening downward, the inner width of the C-shaped groove is larger than the width of the container 4, and the thickness of the bottom short side of the C-shaped groove extending inward is smaller than the height of the horizontal groove 41, so that the bottom short side of the C-shaped groove can pass through the horizontal groove 41 without interference.

[0026] The container conveying device of the first-in-first-out storage warehouse provided by the present invention is provided with a full box buffer conveyor which is parallel to the full box conveyor and has a conveying direction opposite to the full box conveyor. The containers filled with materials which are continuously conveyed at equal intervals on the full box conveyor are transferred to the full box buffer conveyor by a shifting mechanism and then conveyed in the reverse direction. The order of the containers used to form a group can be changed without affecting the original conveying speed of the full box conveyor, thereby realizing absolute first-in-first-out of material storage (not only the container group realizes first-in-first-out, but also the single container in each group of containers realizes first-in-first-out), which can ensure the timeliness of the materials and realize the traceability of the material production line. In addition, the sequencing of the containers to be stored in advance further simplifies the structure of the downstream material picking robot, reduces the space occupied by the storage warehouse system, and improves the material caching efficiency.

[0027] Corresponding to the container conveying device of the first-in-first-out storage provided in the embodiment of the present invention, the embodiment of the present invention also provides a container conveying method of the first-in-first-out storage, such as Figure 4 As shown, the method includes the following steps S1 to S4: Step S1: the full box conveyor 1 conveys the nth container 4 filled with materials in a horizontal plane along a first direction to below the first position of the shift mechanism 3, and then the shift mechanism 3 moves from the preset second position to the first position; Wherein, n is a positive integer, and the initial value of n is 1.

[0028] In this embodiment, Figure 2For example, the full box conveyor 1 conveys containers 4 filled with materials from the upstream at equal intervals in the direction indicated by the arrow R. Assuming that the full box conveyor 1 currently moves the first container 4 filled with materials to the first position where the first schematic container 402 is located below the shifting mechanism 3, the shifting mechanism 3 moves from the preset second position to the first position, wherein the second position can be Figure 2 The position of the second schematic container 401 below the displacement mechanism 3 is shown in FIG.

[0029] Step S2: the shifting mechanism 3 transfers the nth container 4 on the full box conveyor 1 located below the first position to the full box buffer conveyor 2, and at the same time the full box conveyor 1 conveys the n+1th container 4 filled with materials in the horizontal plane along the first direction; In some embodiments, when the container conveying method of the first-in-first-out storage provided by the embodiment of the present invention is used for Figure 2 and Figure 3 When the device is shown, the above step S2 may include: Step S21: the vertical lifting cylinder 32 retracts the push rod 321 upward, and the nth container 4 currently located below the first position is hooked and lifted through the bottom short side of the C-shaped groove of the lifting plate 34, so that the bottom surface of the nth container 4 is separated from the first conveyor belt of the full box conveyor 1; Step S22: The moving slide 311 of the horizontal moving electric cylinder 31 moves horizontally toward the full box buffer conveyor 2 by a preset distance, so that the nth container 4 reaches directly above the full box buffer conveyor 2; Preferably, after the movable slide 311 of the horizontal movable electric cylinder 31 moves horizontally in the direction of the full box buffer conveyor 2 by a preset distance, the nth container 4 arrives at Figure 2 Directly above the second schematic container 401 below the displacement mechanism 3 shown in FIG.

[0030] Step S23: the vertical lifting cylinder 32 extends the push rod 321 downward to place the nth container 4 on the second conveyor belt of the full box buffer conveyor 2; Step S3: when the full box conveyor 1 conveys the n+1th container 4 to below the first position, the shifting mechanism 3 returns to the first position; The shift mechanism 3 returns to the first position, specifically including: the moving slide 311 of the horizontal moving electric cylinder 31 moves horizontally toward the full box conveyor 1, driving the bottom short side of the C-shaped groove of the lifting plate 34 connected to the mounting plate 33 to pass through the horizontal grooves 41 on both sides of the container 4 until it moves to the first position. Figure 2 On the basis of this, in step S3, the movable slide 311 of the horizontally movable electric cylinder 31 moves horizontally to the right, passing through Figure 2The lifting plate 34 stops when the bottoms of the C-shaped grooves on the left and right sides are respectively located in the horizontal grooves 41 of the first schematic container 402, confirming that it returns to the first position.

[0031] Step S4: the full box buffer conveyor 2 conveys the nth container 4 along the second direction in the horizontal plane, then sets n=n+1, and returns to execute step S2; The second direction is parallel to the first direction and in opposite directions.

[0032] Preferably, in step S4, the full box buffer conveyor 2 conveys the nth container 4 in the horizontal plane along the second direction by a distance equal to the width of at least one container 4, thereby reserving a position for the next (n+1th) container 4 below the shifting mechanism 3 for the shifting mechanism 3 to transfer the next container 4 from the full box conveyor 1.

[0033] Further, after step S4, the method provided by the embodiment of the present invention further includes step S5: when the number of containers 4 buffered on the full box buffer conveyor 2 reaches a preset number m, the full box buffer conveyor 2 outputs the m containers 4 thereon as a group along the first direction in a horizontal plane; wherein m is a positive integer greater than or equal to 2. Alternatively, the m containers 4 can be directly taken out as a group by a coordinate robot pre-set downstream of the full box buffer conveyor 2, and transferred to a first-in-first-out storage unit for storage in groups.

[0034] Optionally, while the shifting mechanism 3 transfers the first container 4 in the conveying direction of the right full box conveyor 1 to the left to the full box buffer conveyor 2, the full box conveyor 1 continues to convey the next container 4 forward to the first position. While the shifting mechanism 3 lifts the next container 4 from the first position and transfers the container 4 to the left, the full box buffer conveyor 2 can convey the previous container 4 along the second direction, thereby improving the efficiency of container sequencing and conveying.

[0035] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A container conveying device for a first-in-first-out storage, characterized in that: include: A full box conveyor (1), a full box buffer conveyor (2) and a shift mechanism (3); wherein the shift mechanism (3) is arranged above the full box conveyor (1) and the full box buffer conveyor (2); The full box conveyor (1) is used to convey a container (4) filled with materials along a first direction in a horizontal plane to below a first position of the shifting mechanism (3); wherein the width direction of the conveyed container (4) is along the first direction; The shifting mechanism (3) is used to transfer a single container (4) on the full box conveyor (1) located below the first position to the full box buffer conveyor (2); The full box buffer conveyor (2) is used to convey the containers (4) thereon along a second direction in a horizontal plane, wherein the second direction is parallel to and opposite to the first direction.

2. The container conveying device of the first-in-first-out storage according to claim 1, characterized in that: The displacement mechanism (3) comprises: a horizontal moving electric cylinder (31), a vertical lifting cylinder (32), a mounting plate (33), and a grabbing member; The guiding direction of the horizontal moving electric cylinder (31) is horizontal and perpendicular to the first direction; The vertical lifting cylinder (32) is mounted on the movable slide (311) of the horizontal moving electric cylinder (31), and the push rod (321) of the vertical lifting cylinder (32) is arranged in the vertical direction; The mounting plate (33) is connected to the push rod (321), and grabbing pieces are symmetrically mounted at both ends of the mounting plate (33); The grabbing member is used to grab the outer side wall of the container (4), so that when the push rod (321) of the vertical lifting cylinder (32) rises, the grabbed container (4) is lifted through the mounting plate (33) and the grabbing member.

3. The container conveying device of the first-in-first-out storage according to claim 2, characterized in that: Horizontal grooves (41) are provided on two outer side walls in the length direction of the container (4); the grabbing member is a lifting plate (34), and the lifting plate (34) is in the shape of a C-shaped groove with an opening facing downward.

4. The container conveying device of the first-in-first-out storage according to claim 1, characterized in that: The full-box buffer conveyor (2) comprises a second frame (21), a second conveyor belt assembly (22) and a stopper (23); the second conveyor belt assembly (22) is mounted on the second frame (21), and the length direction of the second conveyor belt of the second conveyor belt assembly (22) is along the second direction; the stopper (23) is fixedly mounted at one end of the second conveyor belt assembly (22) in the conveying direction.

5. The container conveying device of the first-in-first-out storage according to claim 1, characterized in that: The full-box buffer conveyor (2) is also used for outputting the m containers (4) thereon as a group in a horizontal plane along the first direction when the number of containers (4) buffered thereon reaches a preset number m; wherein m is a positive integer greater than or equal to 2.

6. A container conveying method for a first-in-first-out storage system, characterized in that: The method comprises: Step S1: the full box conveyor (1) conveys the nth container (4) filled with materials in a horizontal plane along a first direction to below a first position of the shifting mechanism (3), and then the shifting mechanism (3) moves from a preset second position to the first position; wherein the initial value of n is 1; Step S2: the shifting mechanism (3) transfers the nth container (4) on the full box conveyor (1) located below the first position to the full box buffer conveyor (2), and at the same time the full box conveyor (1) conveys the n+1th container (4) filled with materials in a horizontal plane along a first direction; Step S3: when the full box conveyor (1) conveys the n+1th container (4) to below the first position, the shifting mechanism (3) returns to the first position; Step S4: the full box buffer conveyor (2) conveys the nth container (4) along a second direction in a horizontal plane, then sets n=n+1 and returns to execute step S2; wherein the second direction is parallel to and opposite to the first direction.

7. The container conveying method of the first-in-first-out storage according to claim 6, characterized in that: In step S4, the full box buffer conveyor (2) conveys the nth container (4) along the second direction in a horizontal plane, which specifically includes: The full box buffer conveyor (2) conveys the nth container (4) in a horizontal plane along a second direction by a distance equal to the width of at least one container (4).

8. The container conveying method of the first-in-first-out storage according to claim 6, characterized in that: Horizontal grooves (41) are provided on two outer side walls in the length direction of the container (4); the displacement mechanism (3) comprises: a horizontal moving electric cylinder (31), a vertical lifting cylinder (32), a mounting plate (33), and a lifting plate (34); the guiding direction of the horizontal moving electric cylinder (31) is horizontal and perpendicular to the first direction; the vertical lifting cylinder (32) is mounted on a moving slide (311) of the horizontal moving electric cylinder (31), and a push rod (321) of the vertical lifting cylinder (32) is arranged along the vertical direction; the mounting plate (33) is connected to the push rod (321), and lifting plates (34) are symmetrically mounted at both ends of the mounting plate (33); the lifting plate (34) is in the shape of a C-shaped groove with an opening downward; The step S2 comprises: Step S21: the vertical lifting cylinder (32) retracts the push rod (321) upward, and hooks and lifts the nth container (4) currently located below the first position through the bottom short side of the C-shaped groove of the lifting plate (34), so that the bottom surface of the nth container (4) is separated from the first conveyor belt of the full box conveyor (1); Step S22: the movable slide (311) of the horizontal movable electric cylinder (31) moves horizontally by a preset distance in the direction of the full box buffer conveyor (2), so that the nth container (4) reaches directly above the full box buffer conveyor (2); Step S23: the vertical lifting cylinder (32) extends the push rod (321) downward to place the nth container (4) on the second conveyor belt of the full box buffer conveyor (2); In step S3, the shifting mechanism (3) returns to the first position, comprising: The movable slide (311) of the horizontal movable electric cylinder (31) moves horizontally in the direction of the full box conveyor (1), driving the bottom short side of the C-shaped groove of the lifting plate (34) connected to the mounting plate (33) to pass through the horizontal grooves (41) on both sides of the container (4) until it moves to the first position.

9. The container conveying method of the first-in-first-out storage according to claim 6, characterized in that: After step S4, the method further includes: Step S5: When the number of containers (4) cached on the full-box cache conveyor (2) reaches a preset number m, the full-box cache conveyor (2) outputs the m containers (4) thereon as a group in a horizontal plane along the first direction; wherein m is a positive integer greater than or equal to 2.

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