Double-layer conveying line

Abstract

The utility model discloses a double-layer conveying line, which belongs to the field of mobile intelligent sorting, solves the problem that the existing double-layer conveying line is inconvenient to supplement empty boxes, and adopts the technical scheme that the double-layer conveying line mainly comprises a rack, an empty box feeding station, an upper-layer conveying line and a lower-layer conveying line, the upper-layer conveying line corresponds to an empty box feeding station and comprises a plurality of loading stations, an upper-layer pushing device is arranged between every two adjacent loading stations, and the loading stations have a first state for supporting sorting boxes and a second state for enabling the sorting boxes to be transferred between the upper-layer conveying line and the lower-layer conveying line. And a lifting mechanism is arranged between each loading station and the lower-layer conveying line, and when the loading stations are in the second state, the lifting mechanisms are used for transferring the sorting boxes from one of the loading stations and the lower-layer conveying line to the other one of the loading stations and the lower-layer conveying line. According to the utility model, empty box supplement is effectively facilitated, and the working efficiency of the conveying line is effectively improved.

Description

Technical Field

[0001] The utility model relates to the field of mobile intelligent sorting, in particular to a double-layer conveyor line. Background Art

[0002] In the prior art, a double-layer conveyor line is installed in a mobile intelligent sorting system. The upper layer is usually used to place sorting boxes for sorting and placing materials, and the lower layer is a discharge conveyor line for sorting boxes filled with materials. For example, the utility model patent CN219949660U discloses that material transfer racks are provided at the front and rear ends of the first conveyor line and the second conveyor line. The material transfer racks transfer materials on one of the first conveyor line and the second conveyor line to the other of the first conveyor line or the second conveyor line, and can also transfer empty boxes to the first conveyor line or the second conveyor line.

[0003] If all stations in the first conveyor line are sorting materials of the same specifications or can sort materials of all specifications at the same time, when a station in the first conveyor line is full of materials, the sorting boxes in front can be replaced one by one, and the first empty box can be replenished. However, if a station can only place materials of one or several specifications and cannot cover materials of all specifications, or if the specifications of the materials sorted by all stations are different, then when a station in the first conveyor line is full of materials, it is impossible to use the method of replacing the empty boxes one by one with the sorting boxes in front. In addition, since the material transfer rack is located at the rear end of the first and second conveyor lines, the empty boxes cannot be replenished to the corresponding stations. It is necessary to wait until all stations have completed sorting before replenishing the empty boxes. Replenishing empty boxes is inconvenient, resulting in low working efficiency of the conveyor line. Utility Model Content

[0004] The purpose to be achieved by the present invention is to provide a double-layer conveyor line, which solves the problem of inconvenience in replenishing empty boxes in the existing double-layer conveyor line, facilitates the replenishment of empty boxes, and effectively improves the working efficiency of the conveyor line.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a double-layer conveyor line, comprising a frame, an empty box loading station, an upper conveyor line and a lower conveyor line arranged opposite to each other, the upper conveyor line corresponds to the empty box loading station, the upper conveyor line includes a plurality of loading stations, an upper pushing device is provided between adjacent loading stations, the loading station has a first state of supporting the sorting box and a second state of enabling the sorting box to be transferred between the upper conveyor line and the lower conveyor line, when the loading station is in the first state, the empty box loading station The position is used to place the sorting box on the first loading station, the loading station is used to load materials into the sorting box, the upper pushing device is used to push the sorting box to flow between adjacent loading stations, the lower conveyor line is provided with a lower pushing device, the lower pushing device is used to push the sorting box to flow on the lower conveyor line, and a lifting mechanism is provided between each of the loading station and the lower conveyor line. When the loading station is in the second state, the lifting mechanism is used to transfer the sorting box from one of the loading station and the lower conveyor line to the other of the loading station and the lower conveyor line.

[0006] After adopting the above technical scheme, the utility model has the following advantages: first, an upper pushing device is provided between adjacent loading stations. When the loading station is in the first state, the upper pushing device can replace the sorting boxes one by one, and then replenish the empty boxes in the way of replenishing the empty boxes at the first loading station, so that all loading stations can sort materials of the same specifications or can simultaneously sort materials of all specifications. In addition, a lifting mechanism is provided at each loading station and the lower conveyor line. When the loading station is in the second state, the sorting box can be transferred from one of the loading station and the lower conveyor line to the loading station alone. The empty boxes can be replenished at the first loading station and the other one in the lower conveyor line. It can also be achieved that after the empty boxes are replenished at the first loading station, the empty boxes are transferred to the lower conveyor line through the lifting mechanism, and then the empty boxes are transferred through the lower conveyor line to the bottom of the corresponding loading station, and then the empty boxes are replenished to the loading station through the lifting mechanism. This can meet the needs of replenishing empty boxes when one or several loading stations can only place one or several specifications of materials and cannot cover all specifications of materials, or when the specifications of the materials sorted by all loading stations are different. There is no need to wait for all loading stations to complete sorting before replenishing empty boxes. Replenishing empty boxes is more convenient and the working efficiency of the conveyor line is higher.

[0007] Furthermore, each of the loading stations is provided with a first mounting plate and a second mounting plate arranged vertically on both sides, the second mounting plate extends vertically to the lower conveyor line, the lifting mechanism includes a lifting drive unit and a lifting tray, the lifting drive unit is mounted on the second mounting plate, the lifting tray is mounted on the lifting drive unit and can span the loading station, the lifting tray is used to lift the sorting box, and the lifting drive unit can drive the lifting tray to rise and fall.

[0008] By adopting the above-mentioned technical solution, the lifting pallet can quickly transfer the sorting boxes from the upper conveyor line to the lower conveyor line, or vice versa, thereby realizing the efficient transfer of the sorting boxes between the double-layer conveyor lines, facilitating the transfer of full sorting boxes and the replenishment of empty boxes, and accelerating the production process. In addition, the vertically arranged first mounting plate and second mounting plate not only support the lifting mechanism, but also effectively utilize the vertical space and reduce the floor space.

[0009] Furthermore, each of the loading stations is provided with a first limit plate and a second limit plate arranged vertically on both sides, the first limit plate and the second limit plate are respectively located on the inner sides of the first mounting plate and the second mounting plate, the first limit plate and the second limit plate extend vertically to the lower conveyor line to limit the conveying paths of the upper conveyor line and the lower conveyor line, the second limit plate is provided with a limit channel for guiding the vertical lifting of the lifting pallet, and the lifting drive unit drives the lifting pallet to lift and lower along the limit channel.

[0010] By adopting the above-mentioned technical solution, firstly, the first limit plate and the second limit plate can limit the conveying paths of the upper conveyor line and the lower conveyor line, ensuring that the sorting box runs on the correct track, avoiding deviation or collision, optimizing the flow path of the sorting box, and also positioning the position of the sorting box, so that the sorted materials can enter the sorting box more accurately. Secondly, the limit channel provides a precise vertical lifting path for the lifting pallet, ensuring stability and precision during the lifting process, avoiding shaking of the lifting pallet during the lifting process, and effectively reducing the separation of materials from the sorting box.

[0011] Furthermore, an upper roller group and an upper driving unit are respectively provided on the first mounting plate and the second mounting plate, and a through hole is provided on the first limiting plate and the second limiting plate for the upper roller group to pass through. The upper driving unit is used to drive the upper roller group to pass through the through hole into the loading station so that the loading station is in the first state, and to drive the upper roller group to move outside the loading station so that the loading station is in the second state.

[0012] By adopting the above-mentioned technical solution, when the upper roller group passes through the through hole and enters the loading station, it can stably support the sorting box, facilitating the loading or unloading of materials. When there is no need to support the sorting box, the upper roller group moves outside the loading station to provide sufficient space for the lifting pallet and the sorting box, effectively avoiding the upper roller group from interfering with the movement of the lifting pallet and the sorting box.

[0013] Furthermore, the first mounting plate and the second mounting plate are respectively provided with a lower roller group, and all the lower roller groups form a conveying surface of the lower conveying line.

[0014] Through the above technical solution, the lower roller assembly can provide a flat and stable surface, allowing the sorting box to move smoothly on the lower conveyor line, reducing bumps and damage to the materials in the sorting box during transportation. Through the rolling of the roller assembly, the sorting box can be moved more easily along the conveyor line, reducing power requirements and improving conveying efficiency and speed. Compared with sliding directly on a fixed surface, the rolling of the lower roller assembly can significantly reduce noise during transportation, creating a quieter working environment.

[0015] Furthermore, the highest position of the lifting tray is higher than the upper roller group, and the lowest position of the lifting tray is lower than the lower roller group.

[0016] With the aforementioned technical solution, when the lifting tray is raised to its highest position, it can lift the sorting box to a height higher than the upper roller group, so that the sorting box can be easily and smoothly transferred from the lifting tray to the upper conveyor line, reducing obstacles in the transfer process of the sorting box and improving efficiency. Moreover, when the lifting tray is lowered to its lowest position, it will be lower than the lower roller group, which means that the sorting box can be smoothly moved from the lifting tray to the lower conveyor line, ensuring the smoothness of the transfer of the sorting box.

[0017] Furthermore, the first limiting plate is provided with a first clamping jaw, a second clamping jaw and a clamping drive unit, the first clamping jaw and the second clamping jaw are respectively connected to the clamping drive unit, the first clamping jaw and the second clamping jaw are located in the loading station, and the clamping drive unit is used to drive the first clamping jaw and the second clamping jaw to open or clamp synchronously to achieve the release of the sorting box or the clamping of the sorting box.

[0018] Through the above technical solution, the gripping drive unit can accurately control the synchronous action of the first jaw and the second jaw, ensuring that the sorting box on the loading station can be firmly clamped when needed, facilitating the loading or unloading of materials, and can be smoothly released when needed.

[0019] Furthermore, the upper pushing device includes an upper pushing drive unit, an upper turning unit, an upper pushing rod, and an upper pushing mounting plate. The upper pushing mounting plate is fixedly mounted on the frame, the upper turning unit is slidably mounted on the upper pushing mounting plate, the upper pushing rod is mounted on the upper turning unit, and the upper pushing drive unit is used to drive the upper turning unit to move relative to the upper pushing mounting plate. The upper turning unit drives the upper pushing rod to move to push the sorting box to flow between adjacent loading stations.

[0020] Through the above technical solution, the upper push rod can push the sorting box between adjacent loading stations as needed, thereby facilitating the adjustment of the position of the sorting box and facilitating the replenishment of empty boxes.

[0021] Furthermore, the upper-layer turning unit includes a main body and a rotating arm that can be turned relative to the main body. The upper-layer pushing rod is fixed on the rotating arm. The rotating arm drives the upper-layer pushing rod to turn over. The upper-layer pushing rod has a pushing position extending into the loading station and an avoidance position located outside the loading station.

[0022] Through the above technical solution, the reversible feature of the rotating arm enables the upper push rod to switch between the pushing position and the avoidance position, which enhances the flexibility of the system when handling sorting boxes of different sizes. At the same time, it can also adapt to various layout requirements on the conveyor line. When the upper push rod is in the avoidance position, it can leave space for other operations, such as the lifting mechanism and the lifting and lowering of the sorting box, avoiding interference between equipment and optimizing space utilization.

[0023] Furthermore, the lower-layer pushing device includes a lower-layer pushing plate and a lower-layer pushing drive unit. The lower-layer pushing drive unit is fixedly mounted on the frame, and the lower-layer pushing plate is mounted on the lower-layer pushing drive unit. The lower-layer pushing drive unit drives the lower-layer pushing plate to push the sorting box to flow on the lower-layer conveyor line.

[0024] Through the above technical solution, the lower-layer pusher drive unit can accurately control the movement of the lower-layer pusher plate, quickly and smoothly pushing the sorting box to move on the lower-layer conveyor line, thereby improving the transfer of sorting boxes and empty boxes, improving the efficiency of empty box replenishment and the rapid output of sorting boxes. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings:

[0026] Figure 1 This is a schematic structural diagram of the double-layer conveyor line in the present utility model;

[0027] Figure 2 This is a structural schematic diagram of the double-layer conveyor line in another perspective of the present invention;

[0028] Figure 3 This is a structural diagram of a certain station of the double-layer conveyor line in the present utility model;

[0029] Figure 4 This is a structural schematic diagram from another perspective of a certain workstation of the double-layer conveyor line in the present utility model;

[0030] In the figure, 100, frame; 101, first mounting plate; 102, second mounting plate; 103, first limit plate; 104, second limit plate; 105, limit channel; 106, through hole; 110, empty box loading station; 120, upper conveyor line; 121, first station; 122, second station; 123, third station; 124, fourth station; 125, upper roller group; 126, upper drive unit; 127, first clamp; 128, second clamp; 130, lower conveyor line ;131. Lower roller group;140. Upper pushing device;141. Upper pushing drive unit;142. Upper turning unit;143. Upper pushing rod;144. Upper pushing mounting plate;151. Lower pushing plate;152. Lower pushing drive unit;160. Lifting mechanism;161. Lifting drive unit;162. Lifting tray;170. Sorting box;180. Gripper cylinder;181. Gripper connecting rod;182. Connecting block;183. Cylinder connecting rod;184. Mounting seat. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0032] The terms "first," "second," "third," "fourth," and so on (if any) in the description and claims of the present invention and the drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0033] It should be understood that in various embodiments of the present invention, the size of the serial numbers of the processes does not mean the order of execution. The order of execution of the processes should be determined by their functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0034] It should be understood that in the present invention, "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0035] It should be understood that in the present invention, "multiple" refers to two or more. "And / or" is only a description of the association relationship of related objects, indicating that three relationships can exist. For example, X and / or Y can represent three situations: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the previous and next related objects are in an "or" relationship. "Including X, Y and Z", "Including X, Y, Z" means that X, Y, and Z are all included, "Including X, Y or Z" means that one of X, Y, and Z is included, and "Including X, Y and / or Z" means that any one, any two, or any three of X, Y, and Z are included.

[0036] The following specific embodiments are used to describe the technical solution of the present invention in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0037] like Figures 1 to 4 As shown, the utility model provides a double-layer conveyor line, including a frame 100, on which an empty box loading station 110, an upper conveyor line 120 and a lower conveyor line 130 are arranged opposite to each other. The upper conveyor line 120 corresponds to the empty box loading station 110, and the upper conveyor line 120 includes a plurality of loading stations. An upper pushing device 140 is provided between adjacent loading stations. The loading station has a first state of supporting a sorting box 170 and a second state of enabling the sorting box 170 to be transferred between the upper conveyor line 120 and the lower conveyor line 130. When the loading station is in the first state, the empty box loading station 110 is used to transfer the sorting box 170 to the upper conveyor line 120. The sorting box 170 is placed on the first loading station. The loading station is used to load materials into the sorting box 170. The upper pushing device 140 is used to push the sorting box 170 to flow between adjacent loading stations. The lower conveyor line 130 is provided with a lower pushing device. The lower pushing device is used to push the sorting box 170 to flow on the lower conveyor line 130. A lifting mechanism 160 is provided between each loading station and the lower conveyor line 130. When the loading station is in the second state, the lifting mechanism 160 is used to transfer the sorting box 170 from one of the loading station and the lower conveyor line 130 to the other of the loading station and the lower conveyor line 130.

[0038] First, an upper pushing device 140 is provided between adjacent loading stations. When the loading station is in the first state, the upper pushing device 140 can replace the sorting boxes 170 one by one, and replenish the empty boxes in the first loading station, so that all loading stations can sort materials of the same specification or can simultaneously sort materials of all specifications. In addition, a lifting mechanism 160 is provided at each loading station and the lower conveying line 130. When the loading station is in the second state, the sorting box 170 can be transferred from one of the loading station and the lower conveying line 130 to the other loading station and the lower conveying line 130. 0, it is also possible to realize that after the first loading station is replenished with empty boxes, the empty boxes are transferred to the lower conveyor line 130 through the lifting mechanism 160, and then the empty boxes are transferred through the lower conveyor line 130 to the bottom of the corresponding loading station, and then the empty boxes are replenished to the loading station through the lifting mechanism 160, so as to meet the situation that one or several loading stations can only place one or several specifications of materials and cannot cover all specifications of materials, or when the specifications of the materials sorted by all loading stations are different, the empty boxes are replenished, so there is no need to wait for all loading stations to complete sorting before replenishing the empty boxes. Replenishing the empty boxes is more convenient and the working efficiency of the conveyor line is higher.

[0039] It should be noted that the empty boxes are also transferred between the empty box loading station 110 and the loading station through the upper pushing device 140.

[0040] In order to realize the transfer of the sorting boxes 170 between the upper conveyor line 120 and the lower conveyor line 130, a vertically arranged first mounting plate 101 and a second mounting plate 102 are respectively provided on both sides of each loading station. The second mounting plate 102 extends vertically to the lower conveyor line 130. The lifting mechanism 160 includes a lifting drive unit 161 and a lifting tray 162. The lifting drive unit 161 is installed on the second mounting plate 102. The vertically arranged first mounting plate 101 and the second mounting plate 102 not only support the lifting mechanism 160, but also effectively utilize the vertical space and reduce the footprint. Among them, the lifting tray 162 is installed on the lifting drive unit 161 and can span the loading station. The lifting tray 162 is used to lift the sorting box 170. The lifting drive unit 161 can drive the lifting tray 162 to rise and fall, so that the lifting tray 162 can quickly transfer the sorting box 170 from the upper conveyor line 120 to the lower conveyor line 130, or vice versa, realizing efficient transfer of the sorting box 170 between the double-layer conveyor lines, facilitating the transfer of the sorting box 170 after it is full and the replenishment of empty boxes, and accelerating the production process.

[0041] During the transfer process, the sorting box 170 is prone to sliding and changing its position, which makes it difficult for the lifting tray 162 to transfer the sorting box 170. For this reason, a first limiting plate 103 and a second limiting plate 104 are arranged vertically on both sides of each loading station. The first limiting plate 103 and the second limiting plate 104 are respectively located on the inner sides of the first mounting plate 101 and the second mounting plate 102. The first limiting plate 103 and the second limiting plate 104 extend vertically to the lower conveyor line 130 to limit the conveying paths of the upper conveyor line 120 and the lower conveyor line 130, ensuring that the sorting box 170 runs on the correct track to avoid deviation or collision, optimize the flow path of the sorting box 170, and also locate the position of the sorting box 170, so that the sorted materials can enter the sorting box 170 more accurately. Secondly, the second limiting plate 104 is provided with a limiting channel 105 for guiding the vertical lifting of the lifting tray 162. The lifting drive unit 161 drives the lifting tray 162 to lift and lower along the limiting channel 105. The limiting channel 105 can provide the lifting tray 162 with a precise vertical lifting path, ensuring stability and accuracy during the lifting process, avoiding the shaking of the lifting tray 162 during the lifting process, and effectively reducing the separation of materials from the sorting box 170.

[0042] Preferably, the lifting drive unit 161 includes a driving motor and a driving belt driven by the driving motor, and the lifting tray 162 is driven by the driving belt to perform lifting motion. The lifting tray 162 can be composed of a lifting rod or a lifting platform.

[0043] In order to support the sorting box 170 on the upper conveyor line 120, upper roller groups 125 are respectively provided on the first mounting plate 101 and the second mounting plate 102. All the upper roller groups 125 form the conveying surface of the upper conveyor line 120, so that the sorting box 170 can move smoothly on the upper conveyor line 120, reducing the bumps and damage of the materials in the sorting box 170 during the transportation process. Through the rolling of the roller groups, the sorting box 170 can be more easily moved along the upper conveyor line 120, reducing power requirements and improving conveying efficiency and speed. Compared with sliding directly on a fixed surface, the rolling of the upper roller groups 125 can significantly reduce noise during the conveying process, creating a quieter working environment.

[0044] In order to promote the transfer of the sorting box 170 between different loading stations, the sorting box 170 and the lifting tray 162 need to move between the upper conveyor line 120 and the lower conveyor line 130. In order to reduce the interference of the upper roller group 125 on the sorting box 170 and the lifting tray 162, the first mounting plate 101 and the second mounting plate 102 are respectively provided with an upper driving unit 126 corresponding to the upper roller group 125, and the first limiting plate 103 and the second limiting plate 104 are provided with a through hole 106 for the upper roller group 125 to pass through. The upper driving unit 126 is used to drive the upper roller group 125 to pass through the through hole 106 into the loading station so that the loading station is in the first state, which is convenient for loading or unloading of materials. When there is no need to support the sorting box 170, the upper driving unit 126 is used to drive the upper roller group 125 to move outside the loading station so that the loading station is in the second state, providing sufficient space for the lifting tray 162 and the sorting box 170, and effectively avoiding the upper roller group 125 from interfering with the movement of the lifting tray 162 and the sorting box 170.

[0045] It should be noted that the upper driving unit 126 can be a pushing cylinder, which pushes the upper roller group 125 to move more smoothly. The upper roller group 125 is composed of multiple rollers arranged at intervals, and the multiple rollers are fixed by a support frame. Each loading station is provided with a pushing cylinder, which drives multiple rollers to enter or move out of the loading station at the same time through the pushing support frame.

[0046] Specifically, the upper pushing device 140 includes an upper pushing drive unit 141, an upper turning unit 142, an upper pushing rod 143, and an upper pushing mounting plate 144. The upper pushing mounting plate 144 is fixedly mounted on the frame 100, the upper turning unit 142 is slidably mounted on the upper pushing mounting plate 144, and the upper pushing rod 143 is mounted on the upper turning unit 142. The upper pushing drive unit 141 is used to drive the upper turning unit 142 to move relative to the upper pushing mounting plate 144, and the upper turning unit 142 drives the upper pushing rod 143 to move to push the sorting box 170 to flow between adjacent loading stations, thereby facilitating the adjustment of the position of the sorting box 170 and facilitating the replenishment of empty boxes.

[0047] Among them, the upper turning unit 142 includes a main body and a rotating arm that can be turned relative to the main body. The upper pushing rod 143 is fixed on the rotating arm, and the rotating arm drives the upper pushing rod 143 to turn over. The upper pushing rod 143 has a pushing position extending into the loading station and an avoidance position located outside the loading station. It can adapt to various layout requirements on the conveyor line. When the upper pushing rod 143 is in the avoidance position, space can be reserved for other operations, such as the lifting and lowering actions of the lifting mechanism 160 and the sorting box 170, thereby avoiding interference between equipment and optimizing space utilization.

[0048] In order to support the sorting box 170 more stably at the loading station to enable the loading or unloading of materials, a first clamping jaw 127, a second clamping jaw 128 and a clamping drive unit are provided on the first limiting plate 103. The first clamping jaw 127 and the second clamping jaw 128 are located in the loading station. The first clamping jaw 127 and the second clamping jaw 128 are respectively connected to the clamping drive unit. The clamping drive unit is used to drive the first clamping jaw 127 and the second clamping jaw 128 to open or clamp synchronously to release the sorting box 170 or clamp the sorting box 170, ensuring that the sorting box 170 can be firmly clamped when needed to facilitate the loading or unloading of materials, and can be smoothly released when released.

[0049] Preferably, two groups of clamping drive units are provided, and the two groups of clamping drive units drive the first clamping jaw 127 and the second clamping jaw 128 separately. The drive unit includes a clamping jaw cylinder 180 and a transmission connecting rod group that is transmission-connected to the output end of the clamping jaw cylinder 180. The transmission connecting rod group is connected to the first clamping jaw 127 and the second clamping jaw 128 respectively. The clamping jaw cylinder 180 is arranged on a side away from the loading station. The clamping jaw cylinder 180 drives the first clamping jaw 127 and the second clamping jaw 128 to approach each other through the transmission connecting rod group to clamp the sorting box 170, and drives the first clamping jaw 127 and the second clamping jaw 128 away from each other to release the sorting box 170.

[0050] Among them, the driving unit structure of driving the first clamping jaw 127 and the second clamping jaw 128 is the same. Taking the driving of the first clamping jaw 127 as an example, the transmission connecting rod group specifically includes a clamping jaw connecting rod 181, a connecting block 182 and a cylinder connecting rod 183. The back side of the first limiting plate 103 is fixed with a mounting seat 184 by bolts. The first clamping jaw 127 rotates to connect the mounting seat 184 and the clamping jaw connecting rod 181, the connecting block 182 rotates to connect the clamping jaw connecting rod 181, the mounting seat 184 and the cylinder connecting rod 183, the driving cylinder 180 rotates to connect the cylinder connecting rod 183, and the driving cylinder 180 is fixed on the mounting seat 184.

[0051] In order to support the sorting box 170 on the lower conveyor line 130, a lower roller group 131 is respectively provided on the first mounting plate 101 and the second mounting plate 102. All the lower roller groups 131 form the conveying surface of the lower conveyor line 130, so that the sorting box 170 moves smoothly on the lower conveyor line 130, reducing the bumps and damage of the materials in the sorting box 170 during the transportation process. Through the rolling of the lower roller group 131, the sorting box 170 can be more easily moved along the lower conveyor line 130, reducing power requirements and improving conveying efficiency and speed. Compared with sliding directly on a fixed surface, the rolling of the lower roller group 131 can significantly reduce noise during the transportation process, creating a quieter working environment.

[0052] In addition, the lower-layer pushing device includes a lower-layer pushing plate 151 and a lower-layer pushing drive unit 152. The lower-layer pushing drive unit 152 is fixedly installed on the frame 100, and the lower-layer pushing plate 151 is installed on the lower-layer pushing drive unit 152. The lower-layer pushing drive unit 152 drives the lower-layer pushing plate 151 to push the sorting box 170 to flow on the lower-layer conveyor line 130, which can realize the transfer of the sorting box 170 and the empty box, improve the efficiency of empty box replenishment and the rapid output of the sorting box 170.

[0053] In order to facilitate the transfer of the sorting box 170 between the upper conveyor line 120 and the lower conveyor line 130, the highest position of the lifting tray 162 is higher than the upper roller group 125. When the lifting tray 162 is raised to the highest position, it can lift the sorting box 170 to a height higher than the upper roller group 125, so that the sorting box 170 can be easily and smoothly transitioned from the lifting tray 162 to the upper conveyor line 120, reducing obstacles in the transfer process of the sorting box 170 and improving efficiency. In addition, the lowest position of the lifting tray 162 is lower than the lower roller group 131. When the lifting tray 162 is lowered to the lowest position, it will be lower than the lower roller group 131, which means that the sorting box 170 can be smoothly moved from the lifting tray 162 to the lower conveyor line 130, ensuring the smoothness of the transfer of the sorting box 170.

[0054] In this embodiment, the upper conveyor line 120 includes four loading stations, which are the first station 121, the second station 122, the third station 123, and the fourth station 124. The first station 121 to the fourth station 124 are arranged from left to right, and the empty box loading station 110 is connected to the first station 121.

[0055] When the equipment starts running, no sorting box 170 is placed at any workstation. The upper roller groups 125 of all workstations move toward each other and inward to form the conveying surface of the upper conveyor line 120. An empty sorting box 170 is placed in the empty box loading station 110. The upper pusher 143 provided at the empty box loading station 110 extends to push the sorting box 170 from the empty box loading station 110 to the first workstation 121 of the upper conveyor line 120. The first clamp 127 and the second clamp 128 of the first workstation 121 close to secure the sorting box. Then, the upper pusher 143 provided at the empty box loading station 110 is retracted.

[0056] The upper pushing drive unit 141 pushes the upper pushing rod 143 back to its original position, the empty box loading station 110 continues to place the empty sorting box 170, opens the first clamp 127 and the second clamp 128 of the second station 122, and the upper pushing drive unit 141 of the empty box loading station 110 and the upper pushing drive unit 141 of the second station 122 extend the upper pushing rod 143 set to push the sorting box 170 from the empty box loading station 110 and the first station 121 to the first station 121 and the second station 122, the first clamp 127 and the second clamp 128 of the first station 121 and the second station 122 are closed to fix the sorting box 170, and so on, until the sorting boxes 170 from the second station 122 to the fourth station 124 are filled.

[0057] Sorting bins 170 located at stations 121 through 124 each hold items of different specifications, designated as A, B, C, and D, respectively. Station 122 holds item A, and so on. As sorted items are gradually placed into bins 170, a full bin 170 triggers a transfer step. For ease of explanation, station 124 is fixed to size D, meaning it only holds size D items. Stations 121, 122, and 123 can all hold items of sizes A, B, C, or D.

[0058] When the non-fixed-size stations are full, let's use the case where sorting box 170 at third station 123 is full of items. The first and second clamps 127 and 128 of third station 123 are opened, and the lifting tray 162 of third station 123 rises slightly above the roller height of upper roller assembly 125. Sorting box 170 is lifted by lifting tray 162. When upper roller assembly 125 of third station 123 moves to the outside, lifting tray 162 of third station 123 descends below the height of lower roller assembly 131 of lower conveyor line 130. Sorting box 170 lands on lower roller assembly 131, and the lower pusher drive unit 152 drives lower pusher plate 151 to move sorting box 170 away. After removal, the lower pusher drive unit 152 returns to its original position. When the lifting tray 162 of the third station 123 descends below the height of the lower roller group 131, the upper roller group 125 of the third station 123 moves to the inside, and an empty sorting box 170 is placed on the empty box loading station 110, which can also be placed in advance. The first clamping jaws 127 and the second clamping jaws 128 of the first station 121 and the second station 122 are opened, and the upper pushing rod 143 corresponding to the upper turning unit 142 from the empty box loading station 110 to the second station 122 is extended. The upper pushing driving unit 141 drives the upper pushing rod 143 to push the sorting box 170 into the next sorting position, close the first clamping jaws 127 and the second clamping jaws 128 from the first station 121 to the third station 123, and retract the upper turning unit 142 from the empty box loading station 110 to the second station 122. The upper push rod 143 of the layer turning unit 142 is returned to its original position by the upper push drive unit 141, completing the placement of the sorting box 170. The item placement specifications of the sorting boxes 170 corresponding to the different loading stations are sequentially changed: the third station 123 becomes item B, the second station 122 becomes item A, and the first station 121 becomes item C. In other words, the specification number follows the sorting box 170 to the next loading station. Simultaneously, the specification of the sorted item at the first station 121 becomes the specification of the full item removed, namely item C. When other stations or multiple stations are full, the above basic logical relationship can be followed.

[0059] When the fourth station 124 of fixed specifications is full of materials, the first clamping jaw 127 and the second clamping jaw 128 of the fourth station 124 are opened, and the lifting tray 162 of the fourth station 124 rises slightly above the roller height of the upper roller assembly 125, and the sorting box 170 is lifted by the lifting tray 162. When the upper roller assembly 125 of the fourth station 124 moves to the outside, the lifting tray 162 of the fourth station 124 descends below the roller height of the lower roller assembly 131, and the sorting box 170 falls on the rollers of the lower roller assembly 131. The lower pusher driving unit 152 drives the lower pusher plate 151 to move the sorting box 170 away, and then returns to its original position after being moved away.

[0060] When the lifting tray 162 of the fourth station 124 descends below the roller height of the lower roller group 131, the upper roller group 125 of the fourth station 124 moves to the inside, and the empty sorting box 170 is placed on the empty box loading station 110, which can also be placed in advance. Open the first clamping jaws 127 and the second clamping jaws 128 of the first station 121, the second station 122 and the third station 123, extend the upper pushing rod 143 corresponding to the upper turning unit 142 from the first station 121 to the fourth station 124, and the upper pushing driving unit 141 drives the upper pushing rod 143 to push the sorting box 170 into the next loading station, close the first clamping jaws 127 and the second clamping jaws 128 from the second station 122 to the fourth station 124, retract the upper pushing rod 143 of the upper turning unit 142 from the empty box loading station 110 to the fourth station 124, and the upper pushing driving unit 141 retracts the upper pushing rod 143 between the empty parts of the two adjacent sorting boxes 170.

[0061] The lifting tray 162 of the first station 121 rises slightly beyond the roller height of the upper roller group 125, and the sorting box 170 is lifted by the lifting tray 162. When the upper roller group 125 of the first station 121 moves to the outside, the lifting tray 162 of the first station 121 descends below the roller height of the lower roller group 131, and the sorting box 170 falls on the rollers of the lower roller group 131. The lower pushing plate 151 is driven by the lower pushing drive unit 152 to move the sorting box 170 to the lower conveyor line 130 of the fourth station 124, and resets after it reaches its position.

[0062] When the lifting tray 162 of the first station 121 descends below the roller height of the lower roller assembly 131, the upper roller assembly 125 of the first station 121 moves inward. The first and second clamps 127, 128 of the second, third, and fourth stations 122, 123, and 124 are opened, and the upper pusher rods 143 corresponding to the upper flipping units 142 of the second to fourth stations 122, 124 are extended, returning the sorting box 170 to the upper conveyor line 120 of the previous station. The first and second clamps 127, 128 of the first to third stations 121, 123 are closed. The upper pusher rods 143 of the upper flipping units 142 of the empty box loading station 110 to the second station 122 are retracted, and the upper pusher drive unit 141 returns the upper pusher rods 143 to their original positions. The upper roller assembly 125 of the fourth station 124 moves outward, and the lifting tray 162 of the fourth station 124 rises, allowing the empty sorting box 170 to slightly exceed the roller height of the upper roller assembly 125. The upper roller assembly 125 of the fourth station 124 moves inward, and the lifting tray 162 of the fourth station 124 descends, allowing the sorting box 170 to land on the upper conveyor line 120. The first and second clamping jaws 127 and 128 of the fourth station 124 close. Simultaneously, the lifting tray 162 of the fourth station 124 descends below the roller height of the lower roller assembly 131. At this point, the material at the fourth station 124 remains in the original size D.

[0063] It can be understood that in other embodiments, when the fourth station 124 of fixed specifications is full of materials, the first clamping jaw 127 and the second clamping jaw 128 of the fourth station 124 can be opened, and the lifting tray 162 of the fourth station 124 can rise slightly beyond the roller height of the upper roller group 125, and the sorting box 170 can be lifted by the lifting tray 162. When the upper roller group 125 of the fourth station 124 moves to the outside, the lifting tray 162 of the fourth station 124 descends to below the roller height of the lower roller group 131, and the sorting box 170 falls on the rollers of the lower roller group 131. The lower pushing drive unit 152 drives the lower pushing plate 151 to transfer the sorting box 170 away through the lower pushing drive unit 152, and resets it after moving away.

[0064] Then, the sorting boxes at the first station 121, the second station 122 and the third station 123 are respectively transferred to the lower conveyor line 130 through the lifting mechanism 160. After the empty box loading station 110 conveys the empty sorting box 170 to the first station 121, the upper conveyor line 120 drives the empty sorting box 170 to the second station 122, the third station 123 and then the fourth station 124 in turn. After replenishment is completed, the sorting box 170 previously transferred to the lower conveyor line 130 is transferred back to the first station 121, the second station 122 and the third station 123 through the lifting mechanism 160.

[0065] Of course, any loading station can be fixed to a certain specification, and not just one station can be fixed to a certain specification, but multiple stations can be fixed to a certain specification. The empty box is transferred to the bottom of the corresponding loading station through the lower conveyor line 130, and then the empty box is moved to the corresponding loading station through the lifting mechanism 160 to achieve rapid replenishment of the empty box. The sorting box 170 of the upper conveyor line 120 can also be transferred to the lower conveyor line 130 through the lifting mechanism 160.

[0066] It can be understood that in other embodiments, the empty box loading station can also be directly connected to the lower conveyor line to directly convey the empty boxes to the lower conveyor line, and then the empty boxes are replenished to the corresponding loading station through the cooperation of the lower conveyor line and the lifting mechanism.

[0067] It is understandable that in other embodiments, the upper roller assembly can also be flipped into or out of the loading station to switch the loading station between the first state and the second state.

[0068] In addition to the above-mentioned preferred embodiments, the present invention has other implementation methods. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A double-layer conveyor line, comprising a frame, on which an empty box loading station, an upper conveyor line and a lower conveyor line are arranged opposite to each other, wherein the upper conveyor line corresponds to the empty box loading station, and is characterized in that: The upper conveyor line includes several loading stations, and an upper pushing device is provided between adjacent loading stations, and the loading stations have a first state of supporting a sorting box and a second state of enabling the sorting box to be transferred between the upper conveyor line and the lower conveyor line. When the loading station is in the first state, the empty box loading station is used to place the sorting box on the first loading station, and the loading station is used to load materials into the sorting box, and the upper pushing device is used to push the sorting box to flow between adjacent loading stations, and the lower conveyor line is provided with a lower pushing device, and the lower pushing device is used to push the sorting box to flow on the lower conveyor line, and a lifting mechanism is provided between each of the loading stations and the lower conveyor line, and when the loading station is in the second state, the lifting mechanism is used to transfer the sorting box from one of the loading station and the lower conveyor line to the other of the loading station and the lower conveyor line.

2. The double-layer conveyor line according to claim 1, characterized in that: A first mounting plate and a second mounting plate are arranged vertically on both sides of each loading station, and the second mounting plate extends vertically to the lower conveyor line. The lifting mechanism includes a lifting drive unit and a lifting tray. The lifting drive unit is mounted on the second mounting plate. The lifting tray is mounted on the lifting drive unit and can span the loading station. The lifting tray is used to lift the sorting box, and the lifting drive unit can drive the lifting tray to rise and fall.

3. The double-layer conveyor line according to claim 2, characterized in that: A first limit plate and a second limit plate are vertically arranged on both sides of each loading station, and the first limit plate and the second limit plate are respectively located on the inner sides of the first mounting plate and the second mounting plate. The first limit plate and the second limit plate extend vertically to the lower conveyor line to limit the conveying paths of the upper conveyor line and the lower conveyor line. A limiting channel is provided on the second limit plate to guide the vertical lifting of the lifting pallet, and the lifting drive unit drives the lifting pallet to lift and lower along the limiting channel.

4. The double-layer conveyor line according to claim 2, characterized in that: An upper roller group and an upper driving unit are respectively provided on the first mounting plate and the second mounting plate, and a through hole is provided on the first limiting plate and the second limiting plate for the upper roller group to pass through. The upper driving unit is used to drive the upper roller group to pass through the through hole into the loading station so that the loading station is in a first state, and to drive the upper roller group to move outside the loading station so that the loading station is in a second state.

5. The double-layer conveyor line according to claim 4, characterized in that: The first mounting plate and the second mounting plate are respectively provided with a lower roller group, and all the lower roller groups form the conveying surface of the lower conveying line.

6. The double-layer conveyor line according to claim 5, characterized in that: The highest position of the lifting tray is higher than the upper roller group, and the lowest position of the lifting tray is lower than the lower roller group.

7. The double-layer conveyor line according to claim 3, characterized in that: The first limiting plate is provided with a first clamping jaw, a second clamping jaw and a clamping drive unit. The first clamping jaw and the second clamping jaw are located in the loading station. The first clamping jaw and the second clamping jaw are respectively connected to the clamping drive unit. The clamping drive unit is used to drive the first clamping jaw and the second clamping jaw to open or clamp synchronously to release or clamp the sorting box.

8. The double-layer conveyor line according to claim 1, characterized in that: The upper-layer pushing device includes an upper-layer pushing drive unit, an upper-layer turning unit, an upper-layer pushing rod, and an upper-layer pushing mounting plate. The upper-layer pushing mounting plate is fixedly mounted on the frame, the upper-layer turning unit is slidably mounted on the upper-layer pushing mounting plate, the upper-layer pushing rod is mounted on the upper-layer turning unit, the upper-layer pushing drive unit is used to drive the upper-layer turning unit to move relative to the upper-layer pushing mounting plate, and the upper-layer turning unit drives the upper-layer pushing rod to move to push the sorting box to flow between adjacent loading stations.

9. The double-layer conveyor line according to claim 8, characterized in that: The upper layer turning unit includes a main body and a rotating arm that can be turned relative to the main body. The upper layer pushing rod is fixed on the rotating arm. The rotating arm drives the upper layer pushing rod to turn. The upper layer pushing rod has a pushing position extending into the loading station and an avoidance position located outside the loading station.

10. The double-layer conveyor line according to claim 1, characterized in that: The lower-layer pushing device includes a lower-layer pushing plate and a lower-layer pushing drive unit. The lower-layer pushing drive unit is fixedly installed on the frame. The lower-layer pushing plate is installed on the lower-layer pushing drive unit. The lower-layer pushing drive unit drives the lower-layer pushing plate to push the sorting box to flow on the lower-layer conveyor line.

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