Sorting carts, three-dimensional sorting systems, sorting methods

Abstract

To provide a sorting cart that can reduce shaking during operation and improve the stability of transport. [Solution] The sorting cart 103 comprises a rectangular frame 104, a transport device 108 mounted on the rectangular frame 104 so as to be movable in the vertical direction, and a running frame 115 mounted below the rectangular frame 104. In the sorting cart 103, a pair of upper running wheels 110 are provided on the upper part of the rectangular frame 104 in the front-rear direction, and a pair of lower running wheels 113 are provided on the running frame 115 in the left-right direction. The axis Y1 of each upper running wheel 110 extends in the vertical direction. The axis X1 of each lower running wheel 113 extends in the horizontal direction.

Description

Technical Field

[0001] The technology disclosed in this specification relates to sorting trolleys, three-dimensional sorting systems, and sorting methods.

Background Art

[0002] Sorting trolleys are generally used in the sorting of logistics. For example, in Patent Document 1 below, a sorting trolley that moves a conveying device in the vertical direction to enable sorting at different heights is disclosed. In this sorting trolley, lower traveling wheels are provided only at the lower part of the vehicle body frame and it can travel.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the sorting trolley described in Patent Document 1 above, since the height of the sorting trolley is relatively high, when the conveying device is at a high position, the center of gravity becomes high. At this time, since there is no sufficient support or vertical position limit on the upper part of the sorting trolley, a certain amount of sway is likely to occur during operation, which may affect the stability of the conveyance.

[0005] Therefore, the present disclosure has been made to solve the above problems, and an object thereof is to provide a sorting trolley, a three-dimensional sorting system, and a sorting method that can reduce sway during operation and improve the stability of conveyance.

Means for Solving the Problems

[0006] One embodiment of the present disclosure made to solve the above problems is a sorting trolley comprising a vehicle frame and a transport device provided on the vehicle frame so as to be movable in the vertical direction, wherein at least one upper running wheel is provided on the upper part of the vehicle frame, at least one lower running wheel is provided on the lower part of the vehicle frame, the axis of one of the upper running wheel and the lower running wheel extends along the horizontal direction, and the axis of the other of the upper running wheel and the lower running wheel extends along the vertical direction.

[0007] In the above embodiment, it is preferable that the vehicle frame is provided with a running frame at its lower part, and wheel seats for attaching the lower running wheels are rotatably connected to both ends of the first beam of the running frame, the axis of the lower running wheels extends along the horizontal direction, and the axis of the upper running wheels extends along the vertical direction.

[0008] In the above embodiment, the upper running wheels are each connected to support shafts that are separated in the transport direction, the wheel seats of the lower running wheels and the connecting pins of the first beam are located on both sides of the second beam of the travel frame, and it is preferable that the distance between the support shafts that are separated in the transport direction and the distance between the connecting pins that are separated in the transport direction are the same.

[0009] In the above embodiment, it is preferable that the upper running wheels are provided near both ends of the upper part of the vehicle frame, and that upper articulated bearings are attached to each of the support shafts.

[0010] In the above embodiment, it is preferable that a slide-contact type current collector is provided on the side of the second beam.

[0011] In the above embodiment, it is preferable that the vehicle frame has two support columns, each of which is provided with a movable seat that can move vertically, and each movable seat is connected to both sides of the conveying device.

[0012] In the above embodiment, it is preferable that the vehicle body frame is provided with a drive mechanism that moves each of the movable seats in a synchronous vertical direction.

[0013] In the above embodiment, the drive mechanism has two timing belt mechanisms, the pulley of one of the timing belt mechanisms is connected to a motor that rotates the pulley, and the pulleys of the two timing belt mechanisms may be connected to the drive shaft coaxially.

[0014] In the above embodiment, the two timing belt mechanisms may have pulleys at both the upper and lower ends of each support column, and the transmission belt set between the upper and lower pulleys may be passed through the support column.

[0015] In the sorting trolley described above, upper and lower running wheels are provided on the upper and lower parts of the vehicle frame, respectively, and the direction in which the axis of the upper running wheels extends is different from the direction in which the axis of the lower running wheels extends. Therefore, by moving the upper and lower running wheels along the rails, sufficient support and vertical position restriction of the sorting trolley can be achieved compared to a sorting trolley in which the lower running wheels are provided only on the lower part of the vehicle frame. Consequently, shaking during operation can be reduced and the stability of transport can be improved.

[0016] Another embodiment of the present disclosure is a three-dimensional sorting system comprising the sorting cart described above, an upper rail, and a lower rail, wherein the sorting cart is provided to be movable between the upper rail and the lower rail by rotating the upper running wheels along the upper rail and the lower running wheels along the lower rail, and the upper and lower parts of the sorting cart are connected to the upper and lower parts of adjacent sorting carts.

[0017] In the above embodiment, it is preferable that the support columns on both sides of the vehicle frame each have a movable seat that can move in the vertical direction, and that each movable seat is driven by a drive mechanism including a single power source and can move synchronously back and forth in the vertical direction, and that they are symmetrically connected on both sides of the conveying device.

[0018] In the above embodiment, a supply conveyor table is provided on the outside of the sorting cart, and a plurality of sorting units, including at least a first sorting unit and a second sorting unit, are provided on the outside of the sorting cart, the first sorting unit has multiple layers of receiving boxes detachably installed, the upper end of the first side plate of the receiving box facing the sorting cart is lower than the upper end of the second side plate on the opposite side of the first side plate, the second sorting unit has at least one collection chute, and the width of the collection chute is preferably wider than the width of the receiving boxes.

[0019] In the above embodiment, it is preferable that the upper rail has wheel grooves on its sides, the axis of the upper running wheel extends along the vertical direction, and the upper running wheel is rotatably mounted within the wheel grooves.

[0020] In the above embodiment, it is preferable that two upper running wheels are provided on the upper part of the vehicle frame, each of the upper running wheels is rotatably mounted on a support shaft extending in the vertical direction, an upper articulated bearing is attached to each support shaft, and the upper articulated bearing on one of the sorting carts is connected via a connecting rod to the corresponding upper articulated bearing on the adjacent sorting cart.

[0021] In the above embodiment, it is preferable that the vehicle frame is provided with a running frame at its lower part, a sliding contact type current collector is provided on the side of the running frame, and a power supply rail corresponding to the current collector is provided on the inner wall of the outer lower rail.

[0022] In the above aspect, the drive mechanism has a motor provided outside the vehicle body frame. The motor is connected to a first rotating shaft and can rotate the first rotating shaft. The first rotating shaft is coaxially connected to a second rotating shaft via a transmission shaft. Drive wheels located at the lower parts of the respective support columns are connected to the first rotating shaft and the second rotating shaft. Each of the drive wheels is connected to a respective driven wheel provided at the upper part of each support column by a transmission belt. Each of the transmission belts is connected to each moving seat. Each of the driven wheels is rotatably provided at the upper part of each support column. The transmission belt may be provided inside each support column.

[0023] In the above aspect, the support column has a first section and a second section separated from each other. Two belt portions of the transmission belt extending in the vertical direction are respectively arranged in the first section and the second section. An opening is provided on the side of the support column. The moving seat has a slide block slidably provided in the second section. The slide block is connected to a mounting bracket outside the support column. The conveying device may be mounted on the mounting bracket.

[0024] In the above aspect, a third sorting unit is provided outside the sorting trolley. The third sorting unit may have at least one layer of non-powered rollers.

[0025] According to the three-dimensional sorting system of the above aspect, the sorting trolley rotates the upper running wheels along the upper rail and rotates the lower running wheels along the lower rail, and can move between the upper rail and the lower rail. The upper and lower parts of the sorting trolley are connected to the upper and lower parts of adjacent sorting trolleys. In this way, sufficient support and vertical position limitation of each sorting trolley can be achieved, the sway during operation can be reduced, and the stability of conveying can be improved. Also, according to the three-dimensional sorting system of the above aspect, in the first sorting unit, multilayer receiving boxes with a relatively narrow width are used, and the sorting requirements for small goods can be effectively met. Also, without increasing the horizontal space, more sorting can be performed, and it is excellent in space efficiency. Furthermore, even when the receiving box is full of goods, it can be easily moved and exchanged, so it has excellent operability and also contributes to improving work efficiency. On the other hand, in the second sorting unit, a collection chute with a relatively wide width is used, and the sorting requirements for large goods can be met. Also, by arranging sorting units of different sizes according to the size of the goods, compared with the case of using sorting units of the same width, not only is the sorting unit more suitable for the size of the goods, but the number of sorts itself can be increased.

[0026] Another aspect of the present disclosure is in the sorting method in the three-dimensional sorting system described above. In the process of conveying the goods placed on the supply conveyor table in the direction in which the sorting cart moves, a first step of obtaining the dimensional data of the goods measured by the dimensional measuring device and the target position that is the sorting destination of the goods read by the reading device; a second step of determining whether the sorting position of the goods calculated based on the dimensional data measured by the dimensional measuring device and the target position that is the sorting destination of the goods read by the reading device belong to the same type of sorting unit; and if it is determined in the second step that they belong to the same type of sorting unit, when the goods are placed on the sorting cart, the sorting cart is moved to the height corresponding to the target position for the goods, and when the sorting cart has moved to the target position, the conveying device on which the goods are placed is operated to execute sorting; a third step; and if it is determined in the second step that they do not belong to the same type of sorting unit, when the goods are placed on the sorting cart, a fourth step of controlling the sorting cart to sort the goods into an abnormal sorting unit. A sorting method characterized by comprising the above steps.

[0027] In the above embodiment, the first step may involve acquiring weight data of the cargo measured by the weighing conveyor, and the second step may involve determining whether the sorting position of the cargo calculated based on the dimensional data and weight data of the cargo and the target position to which the cargo is sorted belong to the same type of sorting unit.

[0028] According to the sorting method described above, if the sorting position of the cargo calculated based on the dimensional data measured by the dimensional measuring device and the target position to which the cargo will be sorted, as read by the reading device, belong to the same type of sorting unit, the sorting cart can be moved to the target position and sorting can be performed normally. On the other hand, if the sorting position of the cargo calculated based on the dimensional data measured by the dimensional measuring device and the target position to which the cargo will be sorted, as read by the reading device, do not belong to the same type of sorting unit, the cargo will be sorted into an abnormal sorting unit. In this way, even if the cargo is determined to be abnormal based on the dimensional data measured by the dimensional measuring device, it is possible to take appropriate action. Furthermore, according to the sorting method described above, it is possible to respond not only to dimensional data measured by a dimensional measuring device, but also to cases where cargo is deemed abnormal based on weight data measured by a weighing conveyor. [Effects of the Invention]

[0029] According to the sorting cart, three-dimensional sorting system, and sorting method of this disclosure, vibrations during operation can be reduced and the stability of transport can be improved. [Brief explanation of the drawing]

[0030] [Figure 1] This is a plan view of the three-dimensional sorting system of the first embodiment. [Figure 2] This is a perspective view of the three-dimensional sorting system according to the first embodiment. [Figure 3] This is a perspective view of the frame assembly of the first embodiment. [Figure 4]This is a side view of the frame assembly of the first embodiment. [Figure 5] This is an enlarged view of section A shown in Figure 4. [Figure 6] This is a side view of the three-dimensional sorting system according to the first embodiment. [Figure 7] This is a perspective view showing the sorting carts of the first embodiment in a connected state. [Figure 8] This is a perspective view showing the sorting cart of the first embodiment without the conveying device attached. [Figure 9] This is a perspective view of the travel frame of the first embodiment. [Figure 10] This is a cross-sectional view of Figure 8. [Figure 11] This is a magnified view of the lower part of Figure 10. [Figure 12] This is an enlarged view of section B shown in Figure 10. [Figure 13] This is a cross-sectional view of the support column and movable seat of the first embodiment. [Figure 14] This is a cross-sectional view of the conveying device according to the first embodiment. [Figure 15] This is a perspective view of the first sorting unit of the first embodiment. [Figure 16] This is a cross-sectional view of the second sorting unit of the first embodiment. [Figure 17] This is a perspective view of the second sorting unit of the first embodiment. [Figure 18] This is a plan view of the three-dimensional sorting system of the second embodiment. [Figure 19] This is a side view of the third sorting component of the second embodiment. [Figure 20] This is a front view of the third sorting component of the second embodiment. [Figure 21] This is a flowchart illustrating the sorting method in a three-dimensional sorting system. [Modes for carrying out the invention]

[0031] The purposes, advantages, and features of this disclosure are set forth below through a non-limiting description of preferred embodiments. These embodiments are merely representative examples of the application of the technical means of this disclosure, and all technical means formed by equivalent substitutions or equivalent transformations are also included within the scope of protection sought by this disclosure.

[0032] In the description of this embodiment, terms such as "center," "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inside," and "outside," which indicate directions and positional relationships, are based on the positional relationships and directions shown in the drawings and are used solely for the convenience and simplification of explanation. Therefore, these terms do not necessarily mean that the devices or parts indicated have a specific direction, structure, or operating method, and should not be interpreted as limiting this disclosure. Furthermore, terms such as "first," "second," and "third" are used solely for explanatory convenience and do not suggest or limit their importance or order.

[0033] The three-dimensional sorting system of this disclosure will be described below with reference to the attached diagrams. As shown in Figure 1, the three-dimensional sorting system of this disclosure comprises a cross-belt sorting machine 100 and a control unit 1. As shown in Figure 3, the cross-belt sorting machine 100 comprises an annular closing rail, an upper rail 101 and a lower rail 102. Specifically, the cross-belt sorting machine 100 comprises an oval-shaped upper rail 101 and an oval-shaped lower rail 102, and the centers of the upper rail 101 and the lower rail 102 are located on the same axis extending in the vertical direction. Between the upper rail 101 and the lower rail 102, a pair of sorting trolleys 103 are provided so as to be movable along the transport direction (rail direction). The upper and lower parts of adjacent sorting trolleys 103 are connected by hinges.

[0034] As shown in Figure 3, the cross-belt sorting machine 100 includes a frame assembly 10. The frame assembly 10 comprises an upper frame 11 and a lower frame 12, which are connected by a pair of connecting frames 13. The structures of the upper frame 11, the lower frame 12, and the connecting frames 13 are designed as needed. For example, in this embodiment, the upper frame 11 is composed of a combination of multiple crossbeams and vertical beams. The structure of the lower frame 12 is the same as that of the upper frame 11. The connecting frames 13 are at least one rectangular frame, and adjacent connecting frames 13 are connected by X-shaped wire ropes 14. This structure effectively ensures the overall stability of the frame assembly 10.

[0035] As shown in Figure 3, to facilitate the movement of the frame assembly 10, several casters 15 are provided on the bottom of the frame assembly 10. These casters 15 are known casters equipped with a locking mechanism, and further details are omitted.

[0036] The shape of the upper rail 101 can be designed as needed, and is usually formed in an oval shape as described above, but may also be an ellipse or other shape (ring-shaped), and is not particularly limited thereto. The upper rail 101 is installed below the upper frame 11.

[0037] As shown in Figure 3, the lower rail 102 has an outer lower rail 30 positioned on the outside and an inner lower rail 40 positioned on the inside. The shapes of the outer lower rail 30 and the inner lower rail 40 are similar to the shape of the upper rail 101 located above it. That is, if the upper rail 101 located above it is oval-shaped, then the outer lower rail 30 and the inner lower rail 40 are also formed in an oval shape. The center of the outer lower rail 30 and the center of the inner lower rail 40 are the same. Therefore, the center of the upper rail 101, the center of the outer lower rail 30, and the center of the inner lower rail 40 are located on the same axis extending in the vertical direction.

[0038] The distance between the outer lower rail 30 and the inner lower rail 40 can be designed as needed. The distance between the upper rail 101 and the outer lower rail 30 is the same as the distance between the upper rail 101 and the inner lower rail 40. This allows the sorting trolley 103, which is assembled to the upper rail 101, the outer lower rail 30, and the inner lower rail 40, to run while maintaining a more stable condition.

[0039] As shown in Figures 3 and 4, the outer lower rail 30 and the inner lower rail 40 are installed on the lower frame 12. As shown in Figure 5, both the outer lower rail 30 and the inner lower rail 40 have U-shaped grooves 16, and the openings of the two U-shaped grooves 16 are positioned to face each other. In addition, the outer lower rail 30 and the inner lower rail 40 each have a positioning plate 17 that is connected below the support plate and extends vertically in order to facilitate connection to the lower frame 12. This positioning plate 17 contacts the lower running wheels 113 provided on the sorting trolley 103, and can limit the horizontal position of the sorting trolley 103.

[0040] As shown in Figure 5, the outer lower rail 30 and the inner lower rail 40 are connected to the lower frame 12 by U-shaped connecting members 50 located on the outside of each. The groove of the U-shaped connecting member 50 faces in the opposite direction to the vertically extending positioning plate 17, and the vertical plate in the center in the vertical direction is screwed to the vertically extending positioning plate 17. At the same time, the upper plate of the U-shaped connecting member 50 firmly supports the bottom plate of the positioning plate 17, and the lower plate of the U-shaped connecting member 50 is connected to the lower frame 12.

[0041] As shown in Figure 3, to facilitate processing and assembly, the outer lower rail 30 and the inner lower rail 40 are each constructed by sequentially combining multiple rail sections 18. The ends of adjacent rail sections 18 are connected by U-shaped connecting members 50. To ensure the stability of the connection between the rail sections 18, each U-shaped connecting member 50 is attached to a positioning block 60, as shown in Figure 5, and a fixing groove is provided at the bottom of this positioning block 60. The fixing groove is fitted into a positioning plate 70 on the lower frame 12. This structure prevents shear force from being applied to the bolts that fix the U-shaped connecting members 50 and the rail sections 18, thereby ensuring the stability of the connection. Furthermore, the inner sides of adjacent rail sections 18 are connected by a connecting plate 19.

[0042] As shown in Figure 5, to facilitate power supply, a sliding contact type power supply rail 80 is provided on the inner surface of the positioning plate 17 on the outer lower rail 30. Alternatively, the sliding contact type power supply rail 80 may be provided on the inner surface of the positioning plate 17 on the inner lower rail 40. Furthermore, a primary side member 90 of the linear motor, located between the outer lower rail 30 and the inner lower rail 40, is provided on the lower frame 12.

[0043] As shown in Figure 6, the upper rail 101 and the lower rail 102 are fixed to the support frame 109. The upper rail 101 is provided with a C-shaped upper wheel groove to effectively connect to the sorting trolley 103, and the opening of this upper wheel groove faces downward. As shown in Figure 7, upper running wheels 110 are attached to the top of the sorting trolley 103, and the axis Y1 of the upper running wheels 110 extends in the vertical direction. The upper running wheels 110 are positioned to roll and contact the inner walls on both the left and right sides of the upper wheel groove described above.

[0044] The lower rail 102 is designed to provide better support and stability to the underside of the sorting trolley 103. Specifically, the outer lower rail 30 and the inner lower rail 40 of the lower rail 102 are arranged concentrically and at the same height. As shown in Figure 7, two or four lower running wheels 113 are attached to the underside of the sorting trolley 103, and as shown in Figure 6, each lower running wheel 113 is positioned to roll on the bottom plate 114 of the positioning plate 17 of the outer lower rail 30 and the inner lower rail 40. The axis X1 of the lower running wheels 113 extends horizontally.

[0045] As shown in Figures 7 and 8, the sorting cart 103 is equipped with a body frame 20, which has a rectangular frame 104 and a running frame 115 that supports the rectangular frame 104. Movable seats 106 that can move in the vertical direction are attached to the support columns 105 on both sides of the rectangular frame 104. The two movable seats 106 are driven by a drive mechanism 107 which includes a single power source and are capable of reciprocating in a synchronous manner in the vertical direction. Furthermore, the two movable seats 106 are connected symmetrically at the center position in the front-rear direction on both sides of the conveying device 108.

[0046] As shown in Figures 7 and 8, the rectangular frame 104 of the sorting trolley 103 is positioned on the running frame 115. The running frame 115 has a T-shaped main rod 116 and a mounting rod 117, as shown in Figure 9. The mounting rod 117 corresponds to an example of the "first beam" in this disclosed technology, and the main rod 116 corresponds to an example of the "second beam" in this disclosed technology. The direction in which the main rod 116 extends is perpendicular to the transport direction of the cargo transport device 108 and parallel to the direction of movement of the sorting trolley 103. A sliding contact type current collector 118 is provided on the side of the main rod 116, and as described above, a power supply rail 80 corresponding to this current collector 118 is provided on the inner wall of the outer lower rail 30 of the lower rail 102 (see Figure 5). Preferably, the power supply rail 80 is provided inside the two straight sections of the outer lower rail 30. This reduces wear between the current collector 118 and the power supply rail 80 in the curved portion of the lower rail 102, even if the current collector 118 is installed on the curved portion of the lower rail 102.

[0047] As shown in Figure 9, the mounting rod 117 has a C-shaped groove. The C-shaped groove of the mounting rod 117 faces laterally and opens to the side opposite the main rod 116. Wheel seats 120 are connected to both ends of the mounting rod 117, and a pin shaft 119 extending in the vertical direction is used to connect these wheel seats 120 to the mounting rod 117. Two guide rollers 121 are attached to the lower plate 117a of the mounting rod 117 between the two lower running wheels 113. The axis Z1 of these guide rollers 121 extends in the vertical direction. The two guide rollers 122 are restricted between the vertical surface (restricting surface) of the positioning plate 17 of the outer lower rail 30 and the vertical surface (restricting surface) of the positioning plate 17 of the inner lower rail 40 (see Figures 5 and 6).

[0048] A connecting pin 123 is provided at the center of the mounting rod 117, and the axis of the connecting pin 123 extends in the vertical direction. A lower joint bearing 124 is attached to the main rod 116 on the side opposite to the mounting rod 117. The lower joint bearing 124 of one running frame 115 is connected to the connecting pin 123 of another running frame 115, thereby sequentially connecting the running frames 115 and forming a closed ring-shaped structure. In addition, rectangular frames 104 are arranged on the running frames 115 at intervals from each other to secure space for the drive mechanism 107.

[0049] As shown in Figure 9, a secondary member 125 of a linear motor, which is provided in a planar manner, is attached to the lower part of the main rod 116. As described above, a primary member 90 of a linear motor (see Figure 5) corresponding to the secondary member 125 of the linear motor is provided on the lower rail 102, and the primary member 90 and the secondary member 125 of the linear motor work together to provide a driving force that moves the travel frame 115 along the lower rail 102.

[0050] As shown in Figure 9, the main rod 116 is further connected to an assembly frame 126, which is connected to the bottom of the rectangular frame 104. The rectangular frame 104 has two spaced-apart support columns 105, and the lower ends of these two support columns 105 are connected by a lower connector 127, as shown in Figure 8. The upper ends of the two support columns 105 are connected by an upper connector 128. The lower connector 127 is bolted directly above the assembly frame 126, and as shown in Figure 10, the upper plate 129 of the upper connector 128 is connected to the upper running wheel 110.

[0051] To ensure the structural stability of the upper running wheels 110 and to enable stable hinge connection (rotational connection) of the upper part of the adjacent sorting cart 103, the upper connection section 128 is provided with two upper running wheels 110, symmetrically positioned near both ends, as shown in Figure 8. As shown in Figure 12, each upper running wheel 110 is rotatably mounted on a vertically extending vertical pin shaft 130 provided on the upper plate 129 (see Figure 10) of the upper connection section 128. The vertical pin shaft 130 is screwed to the upper plate 129.

[0052] Specifically, as shown in Figure 12, the vertical pin shaft 130 extending in the vertical direction is provided with an internal screw hole 131, and the top plate 129 is provided with a through hole 132 corresponding to the vertical pin shaft 130. The lock bolt 172 is inserted from the bottom of the top plate 129 through the through hole 132 and screwed into the internal screw hole 131 of the vertical pin shaft 130, thereby firmly fixing the vertical pin shaft 130 and the top plate 129. In addition, a washer is placed between the head of the lock bolt 172 and the top plate 129 to enhance the stability of the fixation.

[0053] As shown in Figure 12, in order to increase the stability of the two vertical pin shafts 130 and to facilitate the installation of the upper articulated bearing 136, a lower reinforcing member 133 and an upper reinforcing member 134 are attached between the two vertical pin shafts 130, below the upper running wheel 110 and connected to the upper plate 129. Through holes 135 corresponding to the two vertical pin shafts 130 are provided at both ends of the upper reinforcing member 134 and the lower reinforcing member 133, and the vertical pin shafts 130 are fitted into these through holes 135. In addition, an upper articulated bearing 136, located between the upper reinforcing member 134 and the lower reinforcing member 133, is connected to the vertical pin shafts 130. To prevent the upper articulated bearing 136 from moving vertically along the vertical pin shafts 130, connecting holes 137 extending vertically and coinciding horizontally are formed in the upper reinforcing member 134, the lower reinforcing member 133, and the upper plate 129, respectively. By passing a bolt through the connecting hole 137 and tightening it with a nut, the upper reinforcing member 134, the upper joint bearing 136, and the lower reinforcing member 133 can be fixed to the upper plate 129, and at the same time, the upper joint bearing 136 can be securely fixed.

[0054] Each of the two vertical pin shafts 130 is fitted with a shaft sleeve 139 positioned above the upper reinforcing member 134 to facilitate the positioning of the bearing 138 of the upper running wheel 110. The outer diameter of this shaft sleeve 139 is approximately the same as the outer diameter of the inner ring of the bearing 138 of the upper running wheel 110, and the shaft sleeve 139 abuts against the bottom of the inner ring of the bearing 138. The upper end of the inner ring of the bearing 138 abuts against the lower surface of a stopper plate 140 attached to the upper end of the vertical pin shaft 130.

[0055] This overall structure not only facilitates the installation of the upper running wheels 110 and upper articulated bearings 136, but also ensures the stability of the overall structure through the interconnection of each component. As a result, the sorting trolley 103 can withstand various shocks during operation, contributing to stable operation over long periods of time.

[0056] During the assembly of the cross-belt sorting machine 100, the upper articulation bearing 136 on one side of any sorting cart 103 is connected to the corresponding upper articulation bearing 136 of an adjacent sorting cart 103 via a connecting rod 171, as shown in Figure 10. The upper articulation bearing 136 is mounted on a longitudinal pin shaft 130 and facilitates the joint movement of the upper part of the rectangular frame 104. The connecting rod 171 is extendable and retractable in the axial direction (conveying direction). Both ends of the connecting rod 171 are rotatably mounted around the longitudinal pin shaft 130 via the upper articulation bearing 136. Therefore, when multiple sorting carts 103 are connected via the connecting rod 171 and travel along the upper rail 101 and lower rail 102, even if there are errors in the track of each rail 101, 102, or if sudden displacement occurs during travel, the connecting rod 171 can be extended or retracted to compensate. In this way, the extension and retraction of each connecting rod 171 ensures that multiple sorting carts 103 can operate in accordance with unexpected situations, reduces noise and shock during operation, and improves the running stability of the multiple sorting carts 103.

[0057] As described above, each sorting cart 103 is provided with a running frame 105 (see Figure 7) on its underside, which has lower running wheels 113 and guide rollers 121 as a running mechanism, and with upper running wheels 110 (see Figure 7) on its upper side, which also serves as a running mechanism. In other words, each sorting cart 103 does not have the same running mechanism as the running frame 105 provided symmetrically above and below; the configuration of the upper running mechanism (two upper running wheels 110) is simpler than the configuration of the lower running mechanism (two lower running wheels 113 and two guide rollers 121). Therefore, compared to sorting carts where the same running mechanism as the running frame 105 is provided symmetrically above and below, the upper structure of the sorting cart 103 in this embodiment is not heavy, and running stability can be improved.

[0058] As shown in Figure 7, the drive mechanism 107 includes a power source located outside the rectangular frame 104, which is a motor 141. The motor 141 is connected to a first rotating shaft 142, as shown in Figure 10, and drives the first rotating shaft 142 to rotate. Specifically, the motor 141 is connected to the first rotating shaft 142 via a reduction gear 143 and a first coupling 144, and the first rotating shaft 142 is rotatably mounted by a bearing seat 145 at the lower end of one support column 105. The first rotating shaft 142 is coaxially connected to a second rotating shaft 147 by a transmission shaft 146, and the second rotating shaft 147 is rotatably mounted by a bearing seat 145 at the lower end of the other support column 105. A drive pulley 148 for torque transmission is attached to the first rotating shaft 142 and the second rotating shaft 147, respectively, and each drive pulley 148 is connected via a transmission belt 149 to a driven pulley 150 installed above each support column 105. The drive pulley 148 corresponds to an example of a “drive wheel” in this disclosed technology, and the driven pulley 150 corresponds to an example of a “driven wheel” in this disclosed technology. The driven pulley 150 is rotatably mounted by a wheel seat 151 at the top of the support column 105. The two transmission belts 149 are each connected to a movable seat 106 (see Figure 8), and as shown in Figure 13, the vertically extending belt portions 152 of these transmission belts 149 are located inside the support column 105.

[0059] To avoid interference between the vertically extending belt portion 152 of the transmission belt 149, the support column 105 may be made of a profiled material, as shown in Figure 13. A partition wall 155 is provided inside the support column 105, dividing the internal space of the support column 105 into a first section 153 and a second section 154. This partition wall 155 also contributes to improving structural strength and enhances the support performance of the support column 105. The two vertically extending belt portions 152 of the transmission belt 149 are located in the first section 153 and the second section 154, respectively. An opening 156 communicating with the second section 154 is provided on the side of the support column 105, and the movable seat 106 has a slide block 157 that is slidably provided inside the second section 154. A portion of the slide block 157 is slidable within the second compartment 154, while the other portion of the slide block 157 protrudes outward from the support column 105 through the opening 156 and is connected to the mounting frame 158.

[0060] As shown in Figure 8, the mounting frame 158 is used to mount the conveying device 108. The mounting frame 158 has a first vertical plate 159, a second vertical plate 160 connected to the first vertical plate 159 at a 90-degree angle, and a support plate 161 connected to the lower end of the second vertical plate 160. As shown in Figure 13, the first vertical plate 159 is fixed to the outer surface of the slide block 157 opposite to the support column 105, and the second vertical plate 160 is positioned inside the support column 105 in a bent state. The conveying device 108 is mounted on the support plate 161.

[0061] As shown in Figure 8, the structure of the upper connection part 128 for facilitating the installation of the bearing seat 145 (see Figure 8) and the structure of the lower connection part 127 for facilitating the installation of the wheel seat 151 (see Figure 8) are the same. The structure of the lower connection part 127 will be described below as an example. The lower connection part 127 has a flat plate at the bottom and C-shaped side plates 162 extending vertically on both sides of the flat plate, which surround and form a C-shaped through groove. The two bearing seats 145 are screwed between the two C-shaped side plates 162 and are located at both ends of the lower connection part 127.

[0062] As shown in Figure 8, the two C-shaped side plates 162 have upper projections 163 that protrude upward, and these upper projections 163 are screwed to the side of the support column 105. The transmission shaft 146 (see Figure 11) is located within the lower connection section 127. Both ends of the transmission shaft 146 are connected to the first rotating shaft 142 and the second rotating shaft 147 via couplings, respectively. Cover plates (not shown) are attached to the top of each upper projection 163 on the two C-shaped side plates 162. These cover plates provide better protection for the transmission shaft 146, couplings, and other components.

[0063] Of course, in other embodiments, the drive wheels, transmission belt, and driven wheels in the drive mechanism described above can be replaced with other structures. Specifically, a first bevel gear (not shown) is connected coaxially to the first and second rotating shafts, respectively, and each first bevel gear meshes with a second bevel gear (not shown). The axis of the second bevel gear extends along the extension direction (vertical direction) of the support column 105, and a lead screw (not shown) is inserted through a section of the support column 105. The lower end of the screw shaft of the lead screw is rotatably connected to a bearing seat 145. The lower end of the screw shaft of the lead screw is coaxially and torque-transmittingly connected to the second bevel gear. The upper end of the lead screw is rotatably mounted by a wheel seat 151. As a result, the rotation of the first bevel gear is switched to the rotation of the screw shaft of the lead screw via the second bevel gear, and a nut attached to this lead screw is connected to a movable seat 106. In this structure, compared to the transmission belt structure described above, the influence of the tension of the belt (transmission belt 149) is less, and the movable seat 106 can be moved more synchronously.

[0064] As shown in Figure 14, the conveying device 108 is a belt conveyor. In order to reduce the weight of the conveying device 108 as much as possible and to reduce energy consumption during operation, the belt conveyor has a frame 165, electric rollers 166 and driven rollers 167 installed at both ends of the frame 165. The conveying belt 168 is wound between the electric rollers 166 and the driven rollers 167. The sides of the frame 165 are connected by reinforcing bars 169 located below the conveying belt 168. Guide flips 170 are also provided on the sides of the frame 165, extending above the conveying belt 168. The guide flips 170 are trapezoidal in shape overall. Both ends of the guide flips 170 are slightly lower than the conveying surface of the conveying device 108 and are located inside the ends of the conveying device 108. This effectively prevents the ends of the guide flips 170 from interfering with the packaging of the cargo.

[0065] During operation of the cross-belt sorting machine 100, the motor 141 rotates the first rotating shaft 142. This causes the two drive pulleys 148 to rotate synchronously. As a result, the two transmission belts 149 rotate synchronously, allowing each of the movable seats 106 connected to the transmission belts 149 to move up and down simultaneously. Consequently, both sides of the conveying device 108 move up and down synchronously, enabling adjustment of the sorting height.

[0066] As shown in Figures 1 and 2, a supply conveyor platform 300 is provided on the outside of the cross-belt sorting machine 100. This supply conveyor platform 300 may be a known multi-stage supply platform, and it can employ a method of reading barcodes using a handheld reader (scanner) to obtain the sorting destination of the cargo, or a method of reading barcodes from a reader installed on top. In addition, to ensure that cargo is sorted to the appropriate sorting unit, a dimensional measuring device is provided on the supply conveyor platform 300. This dimensional measuring device consists of, for example, a 3D camera or a measuring grid, but is not particularly limited. The number and installation location of the supply conveyor platforms 300 can be designed as needed and is not particularly limited.

[0067] As shown in Figures 1 and 2, at least two types of sorting units are provided on the outside of the cross-belt sorting machine 100. As shown in Figure 15, the first sorting unit 500 has a rack 501, and multiple layers of receiving boxes 502 are detachably installed on the rack 501. The upper end of the first side plate 503 of the receiving box 502 that faces the cross-belt sorting machine 100 side (sorting cart 103 side) is lower than the lower end of the second side plate 504 of the receiving box 502 that is located on the opposite side from the cross-belt sorting machine 100 side.

[0068] As shown in Figure 15, the rack 501 has at least four rectangularly arranged support columns 505, with two support columns 505 on the same side connected by a short crossbeam 506. The two support columns 505 closer to the cross-belt sorting machine 100 are connected to a multi-layered first connecting rod 507, and the two support columns 505 further away from the cross-belt sorting machine 100 are connected to a multi-layered second connecting rod 508. The first connecting rod 507 and the second connecting rod 508 form a pair and are used to support a row of receiving boxes 502. In the pair of the first connecting rod 507 and the second connecting rod 508, the first connecting rod 507 is positioned lower than the second connecting rod 508. As a result, the upper end of the first side plate 503 of the receiving box 502 that faces the cross-belt sorting machine 100 is lower than the upper end of the second side plate 504 of the receiving box 502 that is located on the opposite side from the cross-belt sorting machine 100. This makes it easier to load cargo into the receiving boxes 502 of each layer. The outer surface of each receiving box is provided with a hanging edge portion 509 that goes around the top.

[0069] As shown in Figures 16 and 17, the second sorting unit 700 has at least one collection chute (collection sliding tank) 701. The width of the collection chute 701 is wider than the width of the receiving box 502, and the number of layers of the collection chute 701 can be set as needed, for example, two or three layers. Multiple collection chutes 701 are provided in each layer. In a more preferred form, the second sorting unit 700 has a base frame 702, and the base frame 702 is provided with a lower sliding plate 710. The lower sliding plate 710 has inclined plates 703, flat plates 704, and side guard plates 705 arranged in order. Partition plates 706 extending vertically (up and down) are provided on both sides of the lower sliding plate 710, and one collection chute 701 is formed between adjacent partition plates 706.

[0070] The effects and benefits of the three-dimensional sorting system configured as described above will now be explained. In conventional sorting systems, sorting carts travel on rails, such as circular or straight lines, while sorting is performed. However, the sorting height is fixed, and only one or two layers of space can be used vertically, resulting in poor space utilization efficiency. Furthermore, sorting systems in which sorting carts move back and forth have low work efficiency, and AGV (Automated Guided Vehicle) type picking walls are expensive, have complex control scheduling, and are difficult to maintain. Therefore, the market demands a sorting system that has high space utilization efficiency, can be configured in multiple layers by utilizing vertical height, has a wide range of applications, is highly integrated and compact, and is easy to maintain.

[0071] Therefore, in the three-dimensional sorting system of the first embodiment, each sorting cart 103 is provided with a transport device 108 that can move in the vertical direction, so that the transport device 108 can be adjusted to any height. This makes it possible to utilize multiple layers of space in the vertical direction and improve space utilization efficiency. In other words, various types of sorting openings can be provided, and by providing sorting openings in multiple layers in the vertical direction, the number of sorting openings can be greatly increased. Furthermore, the upper rail 101 and the lower rail 102 are annular, and multiple sorting carts 103 are connected and continue to travel in an annular manner along the upper rail 101 and the lower rail 102. As a result, the control scheduling is not complicated, and the three-dimensional sorting system is highly integrated, compact, and easy to maintain. In addition, since each sorting cart 103 does not stop during sorting work and continues to travel in an annular manner, sorting efficiency can be improved.

[0072] Next, the three-dimensional sorting system of the second embodiment will be described. However, the explanation will focus on the differences from the three-dimensional sorting system of the first embodiment, and the same configuration and effects as the three-dimensional sorting system of the first embodiment will be omitted. Figure 18 is a plan view of the three-dimensional sorting system of the second embodiment. As shown in Figure 18, the three-dimensional system of the second embodiment differs from the three-dimensional sorting system of the first embodiment (see Figure 1) in that a third sorting unit 900 is provided. That is, outside the cross-belt sorting machine 100, in addition to the first sorting unit 500 and the second sorting unit 700, a third sorting unit 900 is provided.

[0073] As shown in Figures 19 and 20, the third sorting unit 900 has at least one layer of unpowered roller conveyor groove. Specifically, the third sorting unit 900 has a support frame 901, and the support frame 901 has at least one layer of mounting frames 902. The mounting frames 902 have at least one mounting space 903. A pair of parallel unpowered rollers 904 are arranged in the mounting space 903. The pair of unpowered rollers 904 are arranged so that their height decreases from top to bottom. As a result, the tops of each unpowered roller 904 form an inclined transport surface. In addition, stop bars 905 are provided at both ends of each unpowered roller 904 and above each unpowered roller 904. Thus, the pair of unpowered rollers 904 and the stop bars 905 at both ends form an unpowered roller conveyor groove.

[0074] Next, the sorting method in the three-dimensional sorting system of each embodiment described above will be explained. Figure 21 is a diagram illustrating the sorting method in the three-dimensional sorting system. As shown in Figure 21, the sorting method comprises steps S0 to S5, and step S0 is performed by an operator before the control unit 1 (see Figures 1 and 18) executes steps S1 to S5. In step S0, the operator places the cargo on the supply conveyor table 300 so that the barcode attached to the cargo faces the reader (barcode scanner).

[0075] As shown in Figure 21, after step S0, the control unit 1 executes step S1. In step S1 (first step), as the supply conveyor table 300 transports the cargo placed on it toward the cross-belt sorting machine 100, the dimensional data of the cargo acquired by the dimensional measuring device and the target position to which the cargo will be sorted, read by the reading device are acquired.

[0076] As shown in Figure 21, after step S1, the control unit 1 executes step S2. In step S2 (second step), it is determined whether the sorting position of the cargo calculated based on the cargo's dimensional data and the target position to which the cargo will be sorted, as read by the reader, belong to the same type of sorting unit. Even if the cargo's dimensional data is different, the control unit 1 determines the type of sorting unit based on that dimensional data. That is, cargo exceeding a certain size threshold is sorted into the collection chute 701 of the second sorting unit 700, and smaller cargo is sorted into the receiving box 502 of the first sorting unit 500. If, despite the cargo being of a size that should be sorted into the collection chute 701, the target position to which it will be sorted, as determined by the barcode, is the receiving box 502, forcibly sorting that cargo into the receiving box 502 may result in improper storage or interfere with the sorting of subsequent cargo.

[0077] As shown in Figure 21, if the result of step S2 is YES, the control unit 1 executes step S3. In step S3 (third step), when the cargo enters the sorting cart 103, the sorting cart 103 moves the cargo to a height corresponding to the target position of the sorting destination. Then, when the cargo reaches the target position while still on the sorting cart 103, the conveying device 108 on which the cargo is placed is raised and lowered to perform sorting. On the other hand, if the result of step S2 is NO, the control unit 1 executes step S4. In step S4 (fourth step), when the cargo enters the sorting cart 103, the control unit 1 instructs the sorting cart 103 to sort the cargo to the abnormal sorting unit (unit for processing abnormal items).

[0078] As shown in Figure 21, after step S3 or step S4 is performed, the control unit 1 performs step S5. In step S5, after the sorting cart 103 sorts the cargo to a predetermined sorting unit (target position) or an abnormal sorting unit, the sorting cart 103 returns the transport device 108 to a height where it can be reconnected to the supply conveyor table 300, so that it can receive (load) the next cargo.

[0079] A modified version is described below. In the modified version, the supply conveyor table 300 is also equipped with a weighing conveyor, and when cargo moves onto this weighing conveyor, the control unit 1 also acquires the weight data of the cargo measured by the weighing conveyor. Furthermore, sorting conditions corresponding to the weight range are set for each type of sorting unit. For example, the receiving box 502 cannot handle relatively heavy cargo (e.g., over 5 kg). Accordingly, in step S2 described above, it is determined whether the sorting position of the cargo, determined based on both the cargo's dimensional data and weight data, and the target position to which the cargo will be sorted, determined based on the cargo's barcode, belong to the same sorting unit. For example, even if the position to be sorted based on the cargo's dimensional data is the first sorting unit 500, and the target position determined by the barcode also belongs to the first sorting unit 500, if the position to be sorted based on the weight data corresponds to the third sorting unit 900, the cargo will be sorted to the abnormal sorting unit after entering the sorting cart 103. This abnormal sorting unit may be equipped with a non-powered roller 904 or a collection chute 701. [Explanation of symbols]

[0080] 1…Control Unit 20…Body frame 30...Outer lower rail 40... Inner lower rail 80... Power supply rail 100... Cross-belt sorting machine 101... Upper rail 102... Lower rail 103... Sorting cart 104... Rectangular frame 105...post 106...Movable seat 107…Drive mechanism 108... Conveyor device 110... Upper running wheels 113...Lower running wheels 115... Running frame 118... Current collector 127...Lower connection part 136… Upper joint bearing 141…motor 142...First rotation axis 145...Bearing seat 147...Second rotation axis 148... Drive pulley 149... Transmission belt 150... Driven pulley 500...First sorting unit 502... Receiving Box 700...Second sorting unit 701...Collection Chute 900...Third sorting unit

Claims

1. The vehicle frame and A sorting cart comprising a transport device mounted on the vehicle frame so as to be movable in the vertical direction, At least one upper running wheel is provided on the upper part of the vehicle frame, At least one lower running wheel is provided at the lower part of the vehicle frame, Of the upper and lower running wheels, the axis of one of them extends horizontally. A sorting cart characterized in that the axis of the other of the upper and lower running wheels extends in the vertical direction.

2. In the sorting cart according to claim 1, The aforementioned vehicle frame is equipped with a running frame at the bottom, Wheel seats for attaching the lower running wheels are rotatably connected to both ends of the first beam of the running frame. The axis of the lower running wheel extends along the horizontal direction. A sorting cart characterized in that the axis of the upper running wheels extends along the vertical direction.

3. In the sorting cart according to claim 2, The aforementioned upper running wheels are each connected to support shafts that are separated in the direction of transport, The wheel seat of the lower running wheel and the connecting pin of the first beam are located on both sides of the second beam of the running frame. A sorting cart characterized in that the distance between the support shafts, which are separated in the transport direction, and the distance between the connecting pins, which are separated in the transport direction, are the same.

4. In the sorting cart according to claim 3, The upper running wheels are provided near both ends of the upper part of the vehicle frame, A sorting cart characterized in that upper articulated bearings are attached to each of the aforementioned support shafts.

5. In the sorting cart according to claim 3 or claim 4, A sorting trolley characterized in that a sliding contact type current collector is provided on the side of the second beam.

6. In the sorting cart according to claim 2, The aforementioned vehicle frame has two support columns, Each of the aforementioned support columns is provided with a movable base that can move vertically, A sorting cart characterized in that each of the aforementioned movable seats is connected to both sides of the conveying device.

7. In the sorting cart according to claim 6, A sorting cart characterized in that the vehicle body frame is provided with a drive mechanism that moves each of the movable seats in a synchronous vertical direction.

8. In the sorting cart according to claim 7, The aforementioned drive mechanism has two timing belt mechanisms, The pulley of the aforementioned timing belt mechanism is connected to a motor that rotates the pulley, A sorting cart characterized in that each pulley of the two timing belt mechanisms is connected to the drive shaft on the same axis.

9. In the sorting cart according to claim 8, The two timing belt mechanisms each have pulleys at the upper and lower ends of each of the support columns, A sorting cart characterized in that the transmission belt, which is set between the upper and lower pulleys, is passed through the support column.

10. The sorting cart according to claim 1, Upper rail and In a three-dimensional sorting system equipped with a lower rail, The aforementioned sorting cart is, The upper running wheel rotates along the upper rail, and the lower running wheel rotates along the lower rail, so as to be movable between the upper rail and the lower rail. A three-dimensional sorting system characterized in that the upper and lower parts of the sorting carts are connected to the upper and lower parts of adjacent sorting carts.

11. In the three-dimensional sorting system according to claim 10, Each of the support columns on both sides of the vehicle frame has a movable seat that can move in the vertical direction. Each of the aforementioned movable seats is Driven by a drive mechanism including a single power source, it is capable of synchronously reciprocating in the vertical direction. A three-dimensional sorting system characterized by being symmetrically connected on both sides of the aforementioned conveying device.

12. In the three-dimensional sorting system according to claim 10, A supply conveyor platform is provided on the outside of the aforementioned sorting cart. On the outside of the sorting cart, there are multiple sorting units, including at least a first sorting unit and a second sorting unit. The first sorting unit has multiple layers of receiving boxes that can be detachably installed. In the aforementioned receiving box, the upper end of the first side plate facing the sorting trolley is lower than the upper end of the second side plate on the opposite side of the first side plate. The second sorting unit has at least one collection chute, A three-dimensional sorting system characterized in that the width of the collection chute is wider than the width of the receiving box.

13. In the three-dimensional sorting system according to claim 10, The aforementioned upper rail has grooves for wheels on its sides, The axis of the upper running wheel extends along the vertical direction, A three-dimensional sorting system characterized in that the upper running wheel is rotatably provided within the wheel groove.

14. In the three-dimensional sorting system according to any one of claims 10 to 13, The aforementioned upper running wheels are provided in pairs on the upper part of the vehicle frame, Each of the aforementioned upper running wheels is rotatably mounted on a support shaft extending in the vertical direction, Each of the aforementioned support shafts is fitted with an upper articulated bearing. A three-dimensional sorting system characterized in that the upper articulated bearing on one of the sorting carts is connected via a connecting rod to the corresponding upper articulated bearing on an adjacent sorting cart.

15. In the three-dimensional sorting system according to claim 10, The aforementioned vehicle frame is equipped with a running frame at the bottom, A sliding contact type current collector is provided on the side of the aforementioned travel frame. A three-dimensional sorting system characterized in that a power supply rail corresponding to the current collector is provided on the inner wall of the outer lower rail of the lower rail.

16. In the three-dimensional sorting system according to claim 11, The drive mechanism has a motor located on the outside of the vehicle body frame. The motor is connected to a first rotating shaft and is capable of rotating the first rotating shaft. The first rotating shaft is connected coaxially to the second rotating shaft via a transmission shaft. The first and second rotating shafts are connected to drive wheels located at the lower part of each support column. Each of the aforementioned drive wheels is connected to each of the driven wheels provided on the upper part of each of the aforementioned support columns by a transmission belt. Each of the aforementioned transmission belts is connected to each of the aforementioned moving seats, Each of the aforementioned driven wheels is rotatably mounted on the upper part of each of the aforementioned support columns, The transmission belt is provided within each of the support columns, characterized in that it is a three-dimensional sorting system.

17. In the three-dimensional sorting system according to claim 16, The support column has a first section and a second section separated from each other, The two belt portions of the transmission belt that extend in the vertical direction are arranged in the first section and the second section, respectively. An opening is provided on the side of the aforementioned support column. The movable seat has a sliding block that is slidably provided within the second compartment, The aforementioned slide block is connected to a mounting frame located on the outside of the support column, A three-dimensional sorting system characterized in that the conveying device is attached to the mounting frame.

18. In the three-dimensional sorting system according to claim 10, A third sorting unit is provided on the outside of the aforementioned sorting cart. The third sorting unit is characterized by having at least one layer of unpowered rollers, making it a three-dimensional sorting system.

19. In the sorting method for the three-dimensional sorting system described in claim 12, In the process of transporting the cargo placed on the supply conveyor platform in the direction of movement of the sorting cart, the first step is to acquire the dimensional data of the cargo measured by a dimensional measuring device and the target position to which the cargo will be sorted, read by a reading device. A second step involves determining whether the sorting position of the cargo calculated based on the dimensional data measured by the dimensional measuring device and the target position to which the cargo will be sorted, read by the reading device, belong to the same type of sorting unit. If it is determined in the second step that the goods belong to the same sorting unit, then in the third step, when the goods are placed on the sorting cart, the sorting cart moves the goods to a height corresponding to the target position, and when the sorting cart has moved to the target position, the transport device carrying the goods is activated to perform sorting. A sorting method characterized by comprising: a fourth step, if it is determined in the second step that the cargo does not belong to the same sorting unit, controlling the sorting cart to sort the cargo into an abnormal sorting unit when the cargo is placed on the sorting cart.

20. In the sorting method described in claim 19, In the first step, the weight data of the cargo measured by the weighing conveyor is acquired, The sorting method is characterized in that, in the second step, it is determined whether the sorting position of the cargo calculated based on the cargo's dimensional data and weight data, and the target position to which the cargo is sorted, belong to the same type of sorting unit.

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