Cross-belt sorting trolley with liftable conveying surface, cross-belt sorting system and sorting method thereof

Abstract

The present invention discloses a cross-belt sorting trolley with a liftable conveying surface, a cross-belt sorting system and a sorting method thereof, wherein the sorting trolley comprises a chassis, a storage box is arranged on the chassis, and first and second chains are wound relatively in the storage box, the first and second chains are driven by a motor to be retracted and released, and the mutually separated parts of the first and second chains are flexible, and the mutually meshed parts of the first and second chains form a rigid rod body, which extends to the outside of the storage box and is connected to the bottom of a conveyor, and the conveyor is arranged on a limit mechanism. This scheme adopts a special chain, and by adjusting the length of the rigid rod body extending outside the storage box, the conveying surface of the conveyor can be switched between different heights, creating favorable conditions for multi-layer grid sorting. This driving mode chain is normally wound around the storage and can effectively reduce the occupied longitudinal space. At the same time, its lifting height can be reasonably adjusted according to different application scenarios.

Description

Technical Field

[0001] The present invention relates to the field of logistics sorting, in particular to a cross-belt sorting trolley with a liftable conveying surface, a cross-belt sorting system and a sorting method thereof. Background Art

[0002] The cross-belt sorting system is assembled by the main driving belt conveyor and the trolley (referred to as "trolley") carrying the small belt conveyor. When the "trolley" moves to the specified sorting position, it rotates the belt to complete the task of sorting and sending out the goods. Because the main driving belt conveyor and the belt conveyor on the "trolley" are in a cross shape, it is called a cross belt.

[0003] The traditional cross belt is a flat single-layer structure, and each trolley is driven to move by a chain drive structure. Conventional sorting trolleys, such as the cross-belt logistics sorting trolley disclosed in application No. 201810494383.0, have a fixed belt conveyor and cannot be raised or lowered. Therefore, they need to be used in conjunction with single-layer sorting grids, which cannot meet the sorting needs of thin items and multiple customers in the fields of medicine, clothing, tobacco, banks, etc., that is, they cannot meet the use needs of multi-layer grids or multi-layer shelves. Summary of the invention

[0004] The purpose of the present invention is to solve the above-mentioned problems existing in the prior art and to provide a cross-belt sorting trolley with a liftable conveying surface, a cross-belt sorting system and a sorting method thereof.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A cross-belt sorting trolley with a liftable conveying surface comprises a chassis, a storage box is arranged on the chassis, first and second chains are wound relative to each other in the storage box, the first and second chains are driven by a motor to be retracted and released, and the mutually separated parts of the first and second chains are flexible, and the mutually meshing parts of the first and second chains form a rigid rod body, the rigid rod body extends to the outside of the storage box and is connected to the bottom of a conveyor, and the conveyor is arranged on a limiting mechanism.

[0007] Preferably, in the cross-belt sorting trolley with an elevating conveying surface, each section of the first chain and the second chain has at least two engageable hooks.

[0008] Preferably, in the cross-belt sorting trolley with an elevating conveying surface, a guide sprocket having the same height as the driving sprocket is provided in each storage cavity of the storage box, and the first chain and the second chain are respectively meshed with the driving sprocket and the guide sprocket and are located below the guide sprocket.

[0009] Preferably, in the cross-belt sorting trolley with an elevating conveying surface, the top of the storage box is not higher than the top of the chassis.

[0010] Preferably, in the cross-belt sorting trolley with a liftable conveying surface, the limiting mechanism includes at least three telescopic rods vertically arranged on the chassis and connected to the conveyor at the upper ends.

[0011] Preferably, in the cross-belt sorting trolley with a liftable conveying surface, the limiting mechanism includes guide frames located on both sides of the conveyor, and the conveyor is rollingly connected or slidingly connected to the guide frames.

[0012] The cross-belt sorting system comprises a group of any of the above-mentioned conveying surface liftable cross-belt sorting trolleys which are hinged in sequence, wherein the conveying surface liftable cross-belt sorting trolley is movably arranged on a floor-standing or ceiling-mounted track and is driven by a driving device to move along the track.

[0013] Preferably, the cross-belt sorting system further comprises sorting grids and upper wrapping lines located on the sides of the track, and each of the sorting grids has multiple layers of grids.

[0014] Preferably, in the cross-belt sorting system, each layer of the grid opening is an inclined slot, and the length of the inclined slot of each sorting grid opening gradually increases from the bottom to the top.

[0015] Preferably, the upper package line in the cross-belt sorting system adopts top and bottom surface scanning.

[0016] Preferably, in the cross-belt sorting system, the upper wrapping wires are multiple and arranged side by side, and the length L of the track between the upper wrapping wires on both sides and the sorting grid closest thereto satisfies the following formula:

[0017]

[0018] Among them, H is the maximum moving stroke of the conveyor, V1 is the maximum lifting speed of the conveyor; V2 is the speed of the trolley moving along the track.

[0019] The sorting method of the logistics sorting system with adjustable sorting height is characterized by comprising the following steps:

[0020] S1, the parcel is transported to the upper packaging line. The parcel obtains at least one path on the upper packaging line and is then transported to the reserved vehicle:

[0021] S2, the motor of the sorting trolley is started and, according to the height of the target grid corresponding to the package, the first chain and the second chain are driven to reel or unreel to adjust the length of the rigid rod extending outside the storage box to drive the conveying surface of the conveyor to adjust to the target height;

[0022] S3, the sorting cart follows the loop and moves to the target slot corresponding to the package, and the conveyor starts to transport the package to the target slot;

[0023] S4, the sorting trolley continues to move with the loop line and the motor starts to drive the conveyor to rise and fall so that the conveying surface of the sorting trolley after the package is placed is adjusted to a height that connects with the upper package line before moving to the upper package point.

[0024] The advantages of the technical solution of the present invention are mainly reflected in:

[0025] This solution is cleverly designed and uses a special chain structure. The length of the rigid rod extending outside the storage box is adjusted by retracting and releasing the chain roll, so that the conveying surface of the conveyor can be switched between different heights, creating favorable conditions for multi-layer grid sorting. In addition, this driving method has a simple structure, and the chain is normally wound around the storage box and can effectively reduce the occupied longitudinal space. At the same time, the lifting height can be reasonably adjusted according to different application scenarios.

[0026] The sorting trolley of this solution facilitates docking with conveyor lines of different height differences, can realize transfer between conveyor lines of different heights, can be applied to warehousing and other fields, effectively improves the flexibility of application, has a wider applicability, and can be promoted for utilization.

[0027] The scheme sets the guide sprocket and the driving sprocket to cooperate with each other, which can effectively avoid the contact between the chain and the box body and ensure the smoothness and reliability of the chain movement.

[0028] The installation position of the storage box of this solution can minimize the space it occupies, and can adjust the lowest position of the conveyor to the optimal state, which is conducive to increasing the adjustable stroke of the conveyor.

[0029] The sorting trolley of this solution is guided and limited by a guide frame or a telescopic rod. The guide frame and the telescopic rod have a light load and can effectively ensure the stability of the conveyor during lifting and lowering. In addition, the telescopic rod is used for guidance and limitation, which can occupy a smaller space and will not interfere with the loading and unloading operations of the trolley. The practical effect is better and the overall structure is more streamlined.

[0030] The sorting system of this solution can effectively meet the sorting needs of multi-layer grids, and when using a floor-standing type, a groove can be opened on the ground to accommodate the screw of the lead screw, which can effectively utilize the underground space to increase the length of the screw and realize a large-stroke lifting operation.

[0031] The sorting grid of this solution can be designed as needed, and can effectively adapt to various application scenarios such as warehousing and logistics. When a chute-type sorting grid is used, the length of the chute is designed to be effectively used in conjunction with the receiving slot, while fully saving floor space.

[0032] This solution adopts a double-sided scanning method, which can effectively facilitate the sorting characteristics of thin items, reduce the difficulty of manual packaging, and eliminate the need to ensure that the barcode, QR code, etc. on the package are facing upwards, effectively improving operational efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the sorting trolley of the present invention;

[0034] Figure 2 is a schematic diagram of a lifting drive mechanism in a sorting trolley of the present invention;

[0035] Figure 3 It is a three-dimensional diagram of the lifting drive mechanism in the sorting trolley of the present invention;

[0036] Figure 4 is an end view of the lifting drive mechanism in the sorting trolley of the present invention;

[0037] Figure 5 is a cross-sectional view of the inlet and outlet passage area of ​​the lifting drive mechanism in the sorting trolley of the present invention;

[0038] Figure 6 It is a three-dimensional diagram of the chain of the lifting drive mechanism in the sorting trolley of the present invention;

[0039] Figure 7 is a schematic diagram of a sorting trolley of the present invention having a limiting mechanism of the first embodiment;

[0040] Figure 8 is a top view of the sorting trolley of the present invention having the limiting mechanism of the first embodiment;

[0041] Fig. 9 is a top view of the sorting trolley of the present invention having the limiting mechanism of the second embodiment;

[0042] Fig.10 is a top view of the sorting trolley of the present invention having the limiting mechanism of the third embodiment;

[0043] Fig.11 1 is a top view of the sorting system of the present invention (only a partial structure of the sorting loop is shown in the figure);

[0044] Fig.12 It is a partial schematic diagram of the articulation of the trolley in the sorting system of the present invention;

[0045] Fig.13 Schematic diagram of the connection between the sorting trolley of the present invention and the track (the figure only shows the structure of the upper area of ​​the track, and the structure of the lower area of ​​the track is not shown);

[0046] Fig.14 is a schematic diagram of a first embodiment of a driving device of a sorting system of the present invention;

[0047] Fig.15 is a schematic diagram of a second embodiment of a driving device of a sorting system of the present invention;

[0048] Fig.16 It is a schematic diagram of the connection between the sorting trolley and the sorting grid in the sorting system of the present invention. DETAILED DESCRIPTION

[0049] The purpose, advantages and features of the present invention will be illustrated and explained by the non-limiting description of the following preferred embodiments. These embodiments are only typical examples of the application of the technical solution of the present invention, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection claimed by the present invention.

[0050] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0051] The following is an explanation of the cross-belt sorting trolley with a lifting conveying surface disclosed by the present invention in conjunction with the accompanying drawings. Figure 1 , Attachment Figure 2 As shown, it includes a chassis 111, on which a storage box 1114 is arranged, in which first and second chains 1115 and 1116 are relatively rolled up, and the first and second chains 1115 and 1116 are driven by a motor to be retracted and released, and the separated parts of the first and second chains 1115 and 1116 are flexible, and the mutually meshing parts of the first and second chains 1115 and 1116 form a rigid rod body, which extends to the outside of the storage box 1114 and is connected to the bottom of a conveyor 113, and the conveyor 113 is arranged on a limiting mechanism.

[0052] During operation, the motor drives the first chain 1115 and the second chain 1116 to retract and unwind. Since the first chain 1115 and the second chain 1116 are meshed together, they are reeled or unreeled at the same time. When reeling, the length of the two chains extending out of the storage box 1114 is reduced, thereby shortening the length of the rigid rod body formed by them to achieve the descent of the conveyor. When unreeling, the length of the two chains extending out of the storage box 1114 is increased, thereby increasing the length of the rigid rod body formed by them, thereby driving the belt conveyor to lift.

[0053] Specifically, the chassis 111 can be any known frame structure or plate structure with sufficient bearing capacity. Its specific shape and structure can be designed and adjusted according to actual needs and are not limited here.

[0054] As attached Figure 2 , Attachment Figure 3 As shown, the storage box 1114 has two storage chambers 11141 and 11142 for respectively storing the first chain 1115 and the second chain 1116, and an inlet and outlet passage 11143 located between the two storage chambers 11141 and 11142 and communicating with them. The storage box 1114 is fixed to the chassis 111 by bolts or welding, and the top of the storage box 1114 is preferably not higher than the top of the chassis 111, so that the storage box 1114 does not occupy the moving space of the conveyor 113.

[0055] As attached Figure 2 As shown, the storage chambers 11141 and 11142 have limit grooves 11144 with the same width as the first chain 1115 and the second chain 1116, and a rotating shaft 1119 is rotatably provided at the center of the limit groove 11144, so that the interior thereof forms a structure similar to a winding reel, and the rotating shafts 1119 are respectively connected to an auxiliary motor (not shown in the figure). The auxiliary motor drives the rotating shaft 1119 to rotate forward and reverse, and can cooperate with the retracting and discharging motor 1117 to reel in and out the first chain 1115 and the second chain 1116.

[0056] As attached Figure 2 -Attached Figure 5As shown, the entry and exit channel 11143 of the storage box 1114 is approximately inverted T-shaped as a whole, and the two connecting areas of its horizontal and vertical channels are rounded, and a driving sprocket 1118 is rotatably provided at the two rounded positions of the entry and exit channel 11143, and the driving sprocket 1118 extends into the entry and exit channel 11143 and the driving sprocket 1118 is respectively engaged with the first chain 1115 and the second chain 1116, and the rotating shaft to which one of the driving sprockets 1118 is fixed extends to the outside of the storage box 1114 and is connected to the transmitting and receiving motor 1117, and preferably, the driving sprocket 1118 connected to the transmitting and receiving motor 1117 is engaged with the first chain 1115 with the hook facing upward.

[0057] And, as attached Figure 2 As shown, a rotatable guide sprocket 11120 is also provided on the storage chamber 11141, 11142, the axis of the guide sprocket 11120 is parallel to the axis of the limiting groove 11144, and the height of the guide sprocket 11120 is consistent with the height of the driving sprocket 1118, the first chain 1115 and the second chain 1116 are both located below the guide sprocket 11120, and the first chain 1115 and the second chain 1116 between the driving sprocket 1118 and the guide sprocket 11120 are parallel to the bottom of the storage box, that is, in a horizontal state, thereby effectively avoiding the chain from contacting the interface of the entry and exit channel.

[0058] As attached Figure 2 As shown, one end of the first chain 1115 and the second chain 1116 are respectively fixed on a rotating shaft 1119, and their other ends are superimposed and wound on the rotating shaft 1119 for multiple layers and extend to the outside of the storage box 1114 through the entry and exit channel 11143, and their parts located vertically in the entry and exit channel 11143 are in a meshing state, and their outer ends are connected to the head 11110.

[0059] As attached Figure 5 , Attachment Figure 6 As shown, the structures of each section of the first chain 1115 and the second chain 1116 are the same, the difference is that their hooks are in opposite directions, that is, a hook 11151 of each section of the first chain 1115 faces upward, and a hook 11161 of each section of the chain 1116 faces downward, and each section of the chain 1115 and each section of the chain 1116 are staggered up and down, so that the two hooks 11151 and 11161 can mesh together.

[0060] The following description will be made by taking the first chain 1115 as an example. Figure 6As shown, each section of the first chain 1115 includes at least one pair of first chain plates 11152, a pair of second chain plates 11153, a sleeve 11154, a bearing 11155 and a latch 11156, wherein the first chain plate 11152 is located on the inner side or the outer side of the second chain plate 11153. Preferably, a first chain plate 11152 is located on the inner side of the second chain plate 11153 as an example for explanation, and each of the first chain plates 11152 and the second chain plates 11153 are respectively A first connecting hole 11157 and a second connecting hole 11158 are formed with corresponding positions. The sleeve 11154 is inserted into the inner hole of the bearing 11155 and its two ends are respectively inserted into the first connecting hole 11157 of a first chain plate 11152. The latch 11156 is rotatably inserted in the sleeve 11154 and its two ends are respectively inserted into the second connecting holes 11158 of two second chain plates 11153, and its two ends are locked by a cover plate or the like. The second connecting hole 11158 of the first chain plate 11152 of this section is connected to the first connecting hole 11157 of the second chain plate 11153 of another section through a bushing 11154, a bearing 11155 and a latch 11156; the first connecting hole 11157 of the second chain plate 11153 of this section is connected to the second connecting hole 11157 of the first chain plate 11153 of another section through a bushing 11154, a bearing 11155 and a latch 11156.

[0061] The above-mentioned pair of first chain plates 11152, a pair of second chain plates 11153, bushings 11154 and bearings 11155 constitute a link unit. Of course, in other embodiments, according to the required support strength requirements, each section of the first chain 1115 may have more link units. For example, each section may be composed of three link units, and they are connected to form a section of the first chain through a unified pair of pins.

[0062] As attached Figure 1 As shown, the connecting head 11110 is connected to the bottom of the conveyor 113, and the lifting and lowering driving structures composed of the storage box, the first chain and the second chain can be multiple, so as to ensure effective driving.

[0063] The conveyor 113 can be a belt conveyor, a roller conveyor, a deflection wheel conveyor, etc. Its specific structure is a known technology and will not be described here.

[0064] The limiting mechanism is used to ensure the stability of the conveyor 113 during the lifting process. There are many ways to implement it. In one embodiment, as shown in the attached Figure 7 , Attachment Figure 8 As shown, the limiting mechanism includes guide frames 112 located on both sides of the conveyor 113 , and the conveyor 113 is rollingly connected or slidingly connected to the guide frames 112 .

[0065] As attached Figure 7 , Attachment Figure 8 As shown, the guide frame 112 on each side can be two square tubes 1121 with gaps and a reinforcing tube or plate (not shown) connecting the square tubes, and the two sides of the conveyor 113 are respectively provided with limiting rollers 1131 that fit the two vertical side walls of each square tube 1121, so that the position of the conveyor 113 is limited by the limiting rollers 1131 and the guide frame 112. In addition, the height of the guide frame 112 can be adaptively designed according to the required use environment, and generally a height of 1-8m can be met.

[0066] Of course, when the guide frame 112 is used, the guide frame 112 needs to be set on the chassis 111 and will occupy a certain space. If the lifting height is high, the height of the guide frame 112 will also increase accordingly, occupying a larger space, and the trolley moves along the guide frame 112. Therefore, when the trolley moves, it will generate a certain outward force on the guide frame 112, so when the trolley moves to a high position, it may shake. At this time, a certain structure must be used to ensure the stability of the guide frame 112; at the same time, regardless of whether the trolley is lifted or lowered, the height of the guide frame 112 cannot be changed, and the entire loop needs to be avoided accordingly.

[0067] Therefore, in another optional embodiment, as shown in the attached Fig. 9 As shown, the guide frame 112 can be replaced by a telescopic rod 114, and the telescopic rod 114 is vertically fixed on the chassis 111, and the top of the telescopic rod 114 is fixed to the bottom of the conveyor 113. In this structure, since the telescopic rod 114 is located at the bottom of the conveyor 113, it will not occupy the space on both sides of the conveyor 113, and therefore will not interfere with the upper and lower bag operations of the conveyor 113. At the same time, the telescopic rod 114 has a very small structure under normal conditions and occupies very little space, so the structure can be simplified.

[0068] The number of the telescopic rods 114 is at least 3 and their axes are not in the same plane, so that they can effectively provide support and limit. In addition, when the telescopic rods 114 are installed on the chassis 111, they can extend to the bottom of the chassis 111, that is, when the telescopic rods 114 are in the shortest state, their tops are slightly higher than the top height of the chassis 111, thereby further reducing the space to be occupied in the shortest state so that the lowest position of the conveyor 113 can be as low as possible.

[0069] In yet another embodiment, as shown in the attached Fig.10As shown, the limiting mechanism may include at least one layer of support rods 115 hinged in an X shape. For example, when the support rods 115 are one layer, the lower ends of the support rods 115 are respectively pivotally connected to a slider 116, and the slider 116 is slidably connected to a guide rail 117 on the chassis 111. The upper ends of the two support rods 115 are respectively pivotally connected to a slider 118, and the slider 118 is slidably set on the guide rail 119 at the bottom of the conveyor.

[0070] This solution further discloses a cross-belt sorting system, as shown in the attached Fig.11 As shown, it comprises a group of sequentially hinged conveying surface cross-belt sorting carts 11 of the above-mentioned embodiments, specifically, as shown in the attached Fig.12 As shown, the chassis 111 of the adjacent conveying surface liftable cross-belt sorting trolley 11 is connected to the conveying surface liftable cross-belt sorting trolley 11 through a rod end joint bearing 16. The conveying surface liftable cross-belt sorting trolley 11 is movably arranged on a floor-standing or ceiling-mounted track 12 and is driven by a driving device 13 to move along the track 12.

[0071] As attached Fig.13 As shown, the track 12 can be a circular, elliptical, waist-shaped or other irregular closed track, and the shape of the track 12 can be adaptively designed as needed. Preferably, the track 12 includes two limiting grooves 121 that maintain a gap for one wheel to roll and limit respectively, and a side baffle 122 located below each limiting groove 121. The chassis 111 of each sorting trolley 11 is provided with a roller 1111 located in the limiting groove 121 and a limiting wheel 1112 that fits with the side baffle 122.

[0072] As attached Fig.13 As shown, in one embodiment, the track 12 can be floor-standing, that is, it is set on the ground 14, and if the setting height of the track 12 is relatively low, the conveying surface liftable cross-belt sorting trolley 11 is mounted on the track 12, that is, the conveying surface of the conveying surface liftable cross-belt sorting trolley 11 is located above the track 12; if the height of the track 12 is relatively high, the conveying surface liftable cross-belt sorting trolley 11 can be suspended on the track 12, that is, the conveying surface of the conveying surface liftable cross-belt sorting trolley 11 is lower than the track.

[0073] In another embodiment, the track 12 may also be ceiling-suspended, that is, it is suspended on a roof (not shown) or other high-altitude foundation. In this case, the trolley is preferably hoisted on the track 12, and the hoisting method is suitable for spaces with relatively large building heights.

[0074] The conveying surface can be raised and lowered cross-belt sorting trolley 11 can be connected to the track 12 in a rolling manner or in a sliding manner. Fig.13As shown, rollers 1111 corresponding to the limiting grooves on the track and limiting wheels 1112 fitted with the side panels on the track are provided on both sides of each chassis 111 corresponding to the input and output ends of the conveyor 113, so that the chassis 111 moves along the track 12 to drive the structure thereon to move.

[0075] The driving device 13 can be a chain driving structure of a conventional cross-belt sorting device, or can be other feasible structures. In a preferred embodiment, as shown in the attached Fig.14 As shown, the driving device 13 includes at least one fixed U-groove linear motor 131 and an induction plate 132 fixed on part or all of the conveying surface liftable cross-belt sorting trolley 11 and corresponding to the U-groove position of the U-groove linear motor 131. The U-groove linear motor 131 drives the induction plate 132 to move, thereby driving the conveying surface liftable cross-belt sorting trolley 11 to move. Since the trolleys are hinged to each other, they can move as a whole. Moreover, by reasonably adjusting the number and installation position of the U-groove linear motors 131, the entire trolley loop can reach a set operating speed.

[0076] In another feasible embodiment, as shown in the attached Fig.15 As shown, the driving device 13 includes a friction wheel 134 driven to rotate by a fixed friction motor 133 and a friction plate 135 fixed on part or all of the conveying surface liftable cross-belt sorting trolley 11 and in close contact with the surface of the friction wheel 134. The number of the friction wheels 134 can be two, and a gap is maintained. They can be driven by a friction motor respectively, or by the same friction motor through a certain transmission structure. The corresponding structure here is the prior art and will not be described in detail. The friction plate 135 is located between the two friction wheels 134. When the two friction wheels 134 rotate, the friction plate 135 is driven to move, thereby driving the conveying surface liftable cross-belt sorting trolley 11 to move.

[0077] In addition, as attached Fig.11 As shown, the logistics sorting system with adjustable sorting height also includes sorting grids 2 and an upper wrapping line 3 located on the side of the track, and each of the sorting grids 2 has multiple layers of grids 21.

[0078] As attached Fig.15As shown, the bottom plate 211 of each layer of the sorting grid 2 is a flat plate or a downward inclined plate. When the bottom plate 211 is a flat plate, its structure is similar to the shelves of various warehouses; when the bottom plate 211 is an inclined plate, the package can slide down to the bottom along the bottom plate 211 after entering the grid. At the same time, the rear end of each layer of the grid 21 can be open, that is, each layer of the grid 21 is a long slot. When the rear end of the sorting grid is open, its tail can be connected with other conveyor lines or receiving slots 4; when connected with the receiving slot, the length of each layer of the grid 21 of each sorting grid 2 is different, and the length of the grid 21 increases from bottom to top, thereby effectively creating space for the placement of the receiving slot 4. Of course, the rear end of each layer of the grid 21 can also be an openable door. When a certain amount of parcels are stored in the grid 21, the door can be opened to carry out the pickup operation.

[0079] Furthermore, since it is suitable for storing thin items, the height of each layer of the grid 21 does not need to be very high. Preferably, the spacing between adjacent bottom plates 211 is between 1-30 cm, more preferably between 5-20 cm, and even more preferably between 10-15 cm.

[0080] Of course, the sorting grid 2 can be a plurality of independent parts, or can be a whole with a plurality of rows and columns of grids 21 .

[0081] The upper wrapping line 3 can be any known upper wrapping device with functions of package conveying, weighing, code scanning, and shape measurement. Preferably, the upper wrapping line 3 adopts the method of top surface scanning and bottom surface scanning when scanning. Specifically, the upper wrapping line 3 at least includes a buffer conveyor line (not shown in the figure) and a DWS conveyor line (not shown in the figure). A gap is maintained between the buffer conveyor line and the DWS conveyor line, and the size of the gap is slightly larger than the length of the longest diagonal of the barcode or QR code on the package. A code scanning device (not shown in the figure) with a lens facing upward is provided below the gap so that bottom code scanning can be realized. At the same time, a top code scanning device is provided at the DWS conveyor line.

[0082] Furthermore, in order to ensure the smooth transportation of items between the buffer conveyor line and the DWS conveyor line, a support plate made of transparent material is provided in the gap between them, for example, tempered glass or transparent plastic can be used to avoid collision between the package and the input end of the DWS conveyor line.

[0083] The weighing conveyor line of the upper packaging line 3 includes two connected dynamic weighing conveyor lines, wherein the length of the dynamic weighing conveyor line located at the front end (the position where the items pass first during transportation is the front, and the position where the items pass later is the rear) is greater than the length of the rear end, and the length of the dynamic weighing conveyor line at the front end is preferably between 1m±0.1m, and the length of the dynamic weighing conveyor line at the rear end is between 0.8±0.1m. During operation, small items are weighed by the conveyor line at the front end, and the next package can be transported to the conveyor line at the front end after the small items leave the weighing line at the front end, thereby improving the weighing efficiency of small items, and therefore, the length design of the dynamic weighing conveyor line at the front end can meet the weighing requirements of most small items; large items are weighed simultaneously by two dynamic weighing conveyor lines, and the method and process of integrating the data of the two scales to obtain one weight data is prior art and will not be elaborated herein.

[0084] The upper wrapping wires 3 are multiple and arranged side by side. They can be distributed on both sides of the track 11. At the same time, the length L of the track between the upper wrapping wires 3 on both sides and the sorting grid closest to them satisfies the following formula:

[0085]

[0086] Among them, H is the maximum moving stroke of the conveyor, V1 is the maximum lifting speed of the conveyor; V2 is the speed of the trolley moving along the track. Therefore, when working, the trolley has enough space to transport the bag to the predetermined height and can effectively return to the upper bag height after unloading to realize loading.

[0087] When the entire equipment is working, the start and stop and working status of each electrical component can be controlled through various control devices (such as PLC and host computer or industrial computer, etc.) combined with various sensors (such as photoelectric sensors, proximity sensors, distance sensors, etc.). The specific control structure and control software here are known technologies and are not the focus of this solution, so they will not be elaborated here.

[0088] The above-mentioned sorting method of the logistics sorting system with adjustable sorting height is characterized by comprising the following steps:

[0089] S1, place the parcel on the upper wrapping line manually or through automated equipment, the parcel is transported along the upper wrapping line, and when passing through the code scanning device, the path of the parcel (the place where the parcel is lowered) is obtained, the weight is obtained through a dynamic scale, and the shape data and the reserved trolley are measured by a shape measuring device. Then, the upper wrapping line transports the parcel to the reserved trolley according to the set parameters. This is the prior art and will not be elaborated on.

[0090] S2, after obtaining the path of the package in the previous step, the control device will determine the position and height (number of layers) of the target grid corresponding to the package, and then the control device controls the retracting and discharging motor and the auxiliary motor to start driving the first chain and the second chain to reel or unreel to adjust the length of the rigid rod extending outside the storage box to drive the conveying surface of the conveyor to adjust to the corresponding height of the target grid.

[0091] S3, when the sorting trolley follows the loop line and moves to the position corresponding to the target grid (the position of the sorting grid), the conveyor 113 starts to convey the package to the target grid.

[0092] S4, the sorting trolley continues to move with the loop line and the receiving and discharging motor and the auxiliary motor start to drive the conveyor to rise and fall so that the conveying surface of the sorting trolley is adjusted to a height connected with the upper bag line before moving to the upper bag point.

[0093] There are many implementation methods of the present invention, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the present invention.

Claims

1. Cross-belt sorting system, characterized by: Used for sorting thin parts, it comprises a group of sequentially hinged conveying surface cross-belt sorting trolleys (11) that can be raised or lowered, wherein the conveying surface cross-belt sorting trolleys (11) can be movably arranged on a floor-standing or ceiling-mounted track (12) and driven by a driving device (13) to move along the track (12); The cross-belt sorting trolley with a liftable conveying surface comprises a chassis (111), a storage box (1114) is arranged on the chassis (111), first and second chains (1115, 1116) are rolled up in the storage box (1114), the first and second chains (1115, 1116) are driven by a motor to be retracted and extended, and the mutually separated parts of the first and second chains (1115, 1116) are flexible, and the mutually meshed parts of the first and second chains (1115, 1116) form a rigid rod body, and the rigid rod body extends to the outside of the storage box (1114) and is connected to the bottom of a conveyor (113), and the conveyor (113) is arranged on a limiting mechanism, and the limiting mechanism comprises at least three telescopic rods (114) vertically arranged on the chassis (111) and the upper ends of which are connected to the conveyor (113); It also includes a sorting grid (2) and an upper wrapping line (3) located on the side of the track, each of the sorting grids (2) has multiple grids (21), each grid (21) is an inclined slot, and the length of the inclined slot of each sorting grid (2) gradually increases from the bottom to the top; the rear end of each grid (21) can be open or provided with an openable door, and its rear end is matched with the receiving slot (4); The upper package line (3) uses top and bottom surface scanning; the upper package line at least includes a buffer conveyor line and a DWS conveyor line, a gap is maintained between the buffer conveyor line and the DWS conveyor line, a scanning device with a lens facing upward is arranged below the gap, and a top scanning device is arranged at the DWS conveyor line. The weighing conveyor line of the DWS conveyor line of the upper package line includes two dynamic weighing conveyor lines connected in sequence, wherein the length of the dynamic weighing conveyor line at the front end is greater than the length of the dynamic weighing conveyor line at the rear end. When working, small items are weighed by the conveyor line at the front end, and large items are weighed by the two dynamic weighing conveyor lines at the same time; The sorting method of the cross-belt sorting system comprises the following steps: S1: The parcel is transported to the upper packaging line. After obtaining at least one path on the upper packaging line, the parcel is transported to the reserved sorting vehicle: S2, the motor of the sorting trolley is started and, according to the height of the target grid corresponding to the package, the first chain and the second chain are driven to reel or unreel to adjust the length of the rigid rod extending outside the storage box to drive the conveying surface of the conveyor to adjust to the target height; S3, the sorting cart follows the loop and moves to the target slot corresponding to the package, and the conveyor starts to transport the package to the target slot; S4, the sorting trolley continues to move with the loop line and the motor starts to drive the conveyor to rise and fall so that the conveying surface of the sorting trolley after the package is placed is adjusted to a height that connects with the upper package line before moving to the upper package point.

2. The cross-belt sorting system according to claim 1, characterized in that: A guide sprocket (11120) having the same height as the drive sprocket (1118) is arranged in each storage cavity of the storage box (1114); the first chain (1115) and the second chain (1116) are respectively meshed with the drive sprocket (1118) and the guide sprocket (11120), and are located below the guide sprocket (11120).

3. The cross-belt sorting system according to claim 1, characterized in that: The top of the storage box (1114) is not higher than the top of the bottom plate (111).

4. The cross-belt sorting system according to claim 1, characterized in that: Each section of the first chain (1115) and the second chain (1116) has at least two engageable hooks.

5. The cross-belt sorting system according to any one of claims 1 to 4, characterized in that: The upper envelope wires are multiple and arranged side by side, and the length L of the track between the upper envelope wires on both sides and the sorting grid closest to them satisfies the following formula: L≥H×V2 / V1; Among them, H is the maximum moving stroke of the conveyor, V1 is the maximum lifting speed of the conveyor; V2 is the speed of the trolley moving along the track.

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