Central supply sorting system and method

Abstract

To provide a central supply sorting system and method that improves sorting efficiency.SOLUTION: A central supply sorting system includes a fixed frame 10, an input / supply device 20, at least one sorting cart 30 movably attached to the fixed frame, a plurality of drop slide tanks 41 attached to the fixed frame, and a receiving device 50 provided on an outer edge of the fixed frame. The sorting cart is reciprocable between the input / supply device and the drop slide tank. The receiving device has a plurality of receiving frames 51 corresponding to the drop slide tanks one-to-one. The fixed frame is provided with an input / supply station 101. The input / supply device is provided at the input / supply station of the fixed frame. The fixed frame is provided with the drop slide tank and the receiving device on either side of the input / supply device.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to the technical field of sorting of articles such as commodities and home deliveries, and particularly relates to a central supply sorting system and a central supply sorting method performed using the central supply sorting system.

Background Art

[0002] An automatic sorting system for home deliveries can automatically convey each of a plurality of home deliveries to a corresponding section and continuously and automatically sort a large number of home deliveries. The automatic sorting system has advantages such as high sorting efficiency and low sorting error rate, and is widely used in logistics distribution centers.

[0003] Generally, an automatic sorting system for home deliveries includes a fixed frame fixedly attached, an input supply mechanism fixedly attached, a moving frame attached to the fixed frame so as to be movable in the length direction of the fixed frame, a sorting carriage attached to the moving frame so as to be movable up and down in the height direction of the fixed frame, and a receiving mechanism arranged on the outer side of the fixed frame in the width direction of the fixed frame. The fixed frame is provided with a plurality of sections (i.e., dropping slide grooves), and a plurality of receiving frames are arranged in the receiving mechanism. The plurality of receiving frames and the plurality of sections correspond one-to-one. During the operation of the automatic sorting system for home deliveries, the sorting operator only needs to place a plurality of home deliveries on the input supply mechanism. The sorting carriage moves to the input supply mechanism to receive the home deliveries. Subsequently, the sorting carriage moves to the corresponding section based on the information of the home deliveries. Then, when the sorting carriage discharges the home deliveries, the home deliveries slide down from the section to the corresponding receiving frame. By the reciprocating movement of the sorting carriage between the input supply mechanism and the section, automatic sorting of a plurality of home deliveries is realized.

[0004] Conventional automated parcel sorting systems employ an end-feed structure. That is, an input and supply mechanism is provided at the end of the fixed frame in the longitudinal direction. Examples include the multi-axis two-car automatic sorting device disclosed in Patent Document 1, the XYZ three-axis three-dimensional automatic sorting device disclosed in Patent Document 2, or the high-efficiency two-car automatic sorting device disclosed in Patent Document 3. In conventional end-feed structures, after the sorting carts have transported the parcels to their designated areas, the moving frame needs to move the sorting carts to the end of the fixed frame in the longitudinal direction. In this case, the travel distance of the moving frame and sorting carts in the longitudinal direction of the fixed frame becomes long, which is undesirable for further improvement of sorting efficiency. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Chinese Patent Application No. 202211171868.9 [Patent Document 2] China Utility Model No. 202221541022.5 [Patent Document 3] China Utility Model No. 202320994516.7 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] In view of the shortcomings of the prior art described above, the object of the present invention is to provide a central supply sorting system and method having higher sorting efficiency. [Means for solving the problem]

[0007] To achieve the above objectives, the present invention provides a central supply sorting system comprising a fixed frame and an input / supply device, at least one sorting cart movably mounted on the fixed frame, a plurality of drop slide tanks mounted on the fixed frame, and a receiving device positioned on the outer side of the fixed frame. The sorting cart is capable of reciprocating motion between the input / supply device and the drop slide tanks. The receiving device has a plurality of receiving frames that correspond one-to-one with the drop slide tanks. An input / supply station is provided on the fixed frame. The input / supply device is provided on the input / supply station of the fixed frame. On either the different side of the input / supply device, the drop slide tanks and the receiving device are provided on the fixed frame. In this application, the input / supply station and the input / supply device are provided at non-end positions in the extending direction of the fixed frame. This results in a central supply structure or a non-end supply structure in which the drop slide tanks and the receiving device are provided on the fixed frame on either the different side of the input / supply station and the input / supply device. Compared to the conventional end-supply structure in which the input and supply station and input and supply device are provided at one end in the extension direction of the fixed frame, the present invention allows the sorting cart to travel a shorter distance in the extension direction of the fixed frame during a single sorting operation. This reduces the time required for a single sorting operation and relatively increases the number of drop slide tanks and receiving devices. As a result, sorting efficiency is improved.

[0008] A preferred option for a central supply sorting system is that the fixed frame has a straight line shape, and the input direction of the input supply device is perpendicular to the extension direction of the fixed frame. In the extension direction of the fixed frame, both the input supply station and the input supply device are located at the center of the fixed frame. The central supply sorting system is provided with sorting subsystems on both sides of the input supply station and the input supply device in a direction perpendicular to the input direction of the input supply device. Each sorting subsystem includes a portion of the fixed frame, the drop slide tank, and the receiving device.

[0009] A preferred option for a central supply and sorting system is that the system has a single-cart structure. One sorting cart is provided. The single sorting cart is movable within the areas on both sides of the input supply station in the direction of extension of the fixed frame.

[0010] A preferred option for a central supply sorting system is that the central supply sorting system has a two-car trolley structure. Two sorting trolleys are arranged. Both sorting trolleys are movable within the areas on both sides of the input supply station in the direction of extension of the fixed frame.

[0011] A preferred option for the central supply sorting system is a four-car trolley structure. Four sorting trolleys are arranged. Two of the sorting trolleys are positioned within a region located on one side of the input supply station in the extending direction of the fixed frame, and are movable within that region. The remaining two sorting trolleys are positioned within a region located on the other side of the input supply station in the extending direction of the fixed frame, and are movable within that region.

[0012] As a preferred option for a central supply sorting system, each sorting cart is movably mounted to the fixed frame by a sorting transmission mechanism. Each sorting transmission mechanism includes a translation guide rail fixed to the fixed frame, a translation drive source, a translation frame assembled to slide on the translation guide rail, a longitudinal drive source, and a longitudinal guide rail fixed to the translation frame. The translation guide rail extends parallel to the extension direction of the fixed frame, with both ends extending to the ends of the fixed frame. The longitudinal guide rail extends parallel to the vertical direction of the fixed frame. The translation drive source is connected to transmit power to the translation frame. The sorting cart is assembled to slide on the longitudinal guide rail. The longitudinal drive source is connected to transmit power to the sorting cart. The input supply stations are distributed along a travel path on which the translation frame slides along the translation guide rail.

[0013] As a preferred option for a central supply sorting system, the translation drive source is a translation drive motor fixed to the fixed frame, and the longitudinal drive source is a longitudinal drive motor fixed to the translation frame. The translation drive motor is connected to the translation frame via a first timing belt drive assembly. The first timing belt drive assembly includes a first drive pulley and a first driven pulley rotatably supported on the fixed frame, and a first timing belt connected to the outer circumference of the first drive pulley and the first driven pulley. The translation drive motor is connected to the first drive pulley. The first timing belt is fixedly connected to the translation frame. The longitudinal drive motor is connected to the sorting cart via a second timing belt drive assembly. The second timing belt drive assembly includes a second drive pulley and a second driven pulley rotatably supported on the translation frame, and a second timing belt connected to the outer circumference of the second drive pulley and the second driven pulley. The longitudinal drive motor is connected to the second drive pulley. The second timing belt is fixedly connected to the sorting trolley. Both the extension path of the first timing belt and the extension path of the second timing belt cover the input supply station.

[0014] As a preferred option for a central supply sorting system, if the central supply sorting system has a four-car bogie structure, four parallel movement frames are arranged, two of which are distributed on both sides of the input supply station in the extending direction of the fixed frame and on one side of the fixed frame in the width direction, and share the same parallel movement guide rail. The remaining two parallel movement frames are distributed on both sides of the input supply station in the extending direction of the fixed frame and on the other side of the fixed frame in the width direction, and share the same parallel movement guide rail. Two first timing belt transmission assemblies connected to two parallel movement frames sharing the same parallel movement guide rail are offset in the width direction of the fixed frame.

[0015] A preferred option for a central supply sorting system is that the fixed frame has bends in its extension path. The input supply station and the input supply device are both located at the bends in the fixed frame in the extension direction of the fixed frame.

[0016] As a preferred option for the central supply sorting system, the fixed frame is L-shaped. A sorting subsystem is provided on the side of the fixed frame facing the input supply device in the input direction of the input supply device. In addition, a sorting subsystem is provided on the fixed frame on one side in a direction perpendicular to the input direction of the input supply device. Each sorting subsystem includes a portion of the fixed frame, the drop slide tank, and the receiving device.

[0017] As a preferred option for the central supply sorting system, the fixed frame is T-shaped. A sorting subsystem is provided on the side of the fixed frame facing the input supply device in the input direction of the input supply device. In addition, sorting subsystems are provided on the fixed frame on both sides in a direction perpendicular to the input direction of the input supply device. Each sorting subsystem includes a portion of the fixed frame, the drop slide tank, and the receiving device.

[0018] As a preferred option for a central supply sorting system, each sorting subsystem is provided with drop mechanisms on both sides of the fixed frame perpendicular to its extension direction, and a trolley movement area is formed between the two drop mechanisms, allowing the sorting trolley to move. Each drop mechanism includes a plurality of slide tank bottom plates arranged vertically and fixed to the fixed frame. A plurality of slide tank guard plates are fixed to each slide tank bottom plate, arranged in the extension direction of the fixed frame. The drop slide tank is formed between two adjacent slide tank guard plates and the slide tank bottom plate. A flexible stopper is fixed to the inner edge of each slide tank bottom plate adjacent to the trolley movement area, extending toward the trolley movement area.

[0019] As a preferred option for a central supply sorting system, the flexible stopper includes a plurality of flexible strips aligned in the extension direction of the fixed frame.

[0020] As a preferred option for a central supply sorting system, the input supply device includes a fixedly mounted input supply frame and a plurality of input belt conveying mechanisms attached to the input supply frame. Each input belt conveying mechanism includes a pair of supply rollers rotatably mounted on the input supply frame and a supply conveying belt connected to the pair of supply rollers. The plurality of input belt conveying mechanisms are connected sequentially in the conveying direction. The supply drive sources of the plurality of input belt conveying mechanisms are independent of each other.

[0021] As a preferred option of the central supply sorting system, in the conveying direction of the input belt conveying mechanism, a plurality of the input belt conveying mechanisms are distributed in a stepped manner from a high place to a low place.

[0022] As a preferred option of the central supply sorting system, the input supply device further includes a grating sensor provided on the outer side of each of the input belt conveying mechanisms and fixed to the input supply frame. A detection opening for exposing the grating sensor is formed in the input supply frame.

[0023] As a preferred option of the central supply sorting system, a substantially triangular region is formed between two adjacent input belt conveying mechanisms. Also, the supply roller is a small-diameter roller with a diameter of 40 mm or less.

[0024] As a preferred option of the central supply sorting system, the sorting cart further includes a cart frame movably attached to a fixed frame and a transfer belt conveying mechanism attached to the cart frame. The transfer belt conveying mechanism has a sorting conveyor belt. A plurality of blocking bars arranged in the length direction of the sorting conveyor belt are fixed to the outer surface of the sorting conveyor belt.

[0025] As a preferred option of the central supply sorting system, the sorting cart further includes a metal chip fixed to the edge side of one of the blocking bars and a proximity switch fixed to the cart frame. The proximity switch can sense the metal chip.

[0026] As a preferred option of the central supply sorting system, the sorting cart further includes a photoelectric sensor and a light reflector fixed to the cart frame. The photoelectric sensor and the light reflector are distributed so as to face each other in the vertical direction. The sorting conveyor belt passes between the photoelectric sensor and the light reflector, and a light transmission hole is formed. The light transmission hole can move to a position facing the light reflector.

[0027] As a preferred option for a central supply sorting system, the sorting trolley further includes a pair of lateral position-restricting stoppers mounted on the trolley frame and a pair of main position-restricting stoppers mounted on the trolley frame. A first opening and a second opening are formed between the sorting conveyor belt and the pair of lateral position-restricting stoppers. The first and second openings are distributed at both ends of the sorting conveyor belt in the conveying direction of the sorting conveyor belt. The main position-restricting stoppers are movably mounted on the trolley frame to close or open the first and second openings.

[0028] As a preferred option for a central supply sorting system, each of the main position-regulating stoppers includes two position-regulating gates rotatably mounted on the trolley frame. A stopper drive source is provided in the portion of the sorting trolley where each of the position-regulating gates is located, and is connected to transmit power to each of the position-regulating gates. The stopper drive source is fixed to the trolley frame.

[0029] As a preferred option for a central supply sorting system, the sorting trolley further includes a stopper lifting drive source and a stopper lifting transmission unit mounted on the trolley frame. A pair of the main position restricting stoppers are mounted on the trolley frame so as to be movable up and down. The stopper lifting drive source is connected to transmit power to the pair of the main position restricting stoppers via the stopper lifting transmission unit, causing the pair of the main position restricting stoppers to move up and down synchronously.

[0030] This application further provides a central supply sorting method using the central supply sorting system described above. The central supply sorting method includes the following steps.

[0031] S1: Multiple items to be sorted are placed sequentially on the input / supply device, and the input / supply device transports the items to be sorted toward the fixed frame.

[0032] S2: The sorting cart moves to the input and supply device.

[0033] S3: The sorting cart receives the items to be sorted that have been discharged from the input supply device.

[0034] S4: The sorting cart moves to the drop slide tank corresponding to the items to be sorted on the sorting cart.

[0035] S5: When the sorting cart unloads the items to be sorted, the items are dropped through the drop slide tank into the receiving frame corresponding to the drop slide tank.

[0036] S6: The sorting cart moves and returns to the input / supply device.

[0037] S7: Repeat steps S3 to S6.

[0038] In step S4, which is performed multiple times, the sorting cart is movable toward the drop slide tanks distributed on different sides of the input supply device.

[0039] The present invention further provides a sorting mechanism comprising a parallel-movement guide rail, a first assembly, and a second assembly. The first assembly includes a first bogie and a first parallel-movement transmission unit. The first bogie is movably mounted to the parallel-movement guide rail via the first parallel-movement transmission unit. The second assembly includes a second bogie and a second parallel-movement transmission unit. The second bogie is movably mounted to the parallel-movement guide rail via the second parallel-movement transmission unit. The first and second bogies are movable along the same parallel-movement guide rail. By having the two bogies move along the same parallel-movement guide rail, sorting efficiency is greatly improved. Two parallel-movement transmission units for moving the two bogies are provided on both sides of the parallel-movement guide rail, respectively. This avoids interference between them, simplifies and stabilizes the overall structure, and improves load-bearing capacity.

[0040] As a preferred option for the sorting mechanism, the first assembly includes a first translation drive source. The first translation transmission unit includes a first translation drive wheel, a first translation driven wheel, and a first translation transmission member provided between the first translation drive wheel and the first translation driven wheel. The first translation drive wheel rotates when driven by the first translation drive source. The first carriage is connected to the first translation transmission member. The second assembly includes a second translation drive source. The second translation transmission unit includes a second translation drive wheel, a second translation driven wheel, and a second translation transmission member provided between the second translation drive wheel and the second translation driven wheel. The second translation drive wheel rotates when driven by the second translation drive source. The second carriage is connected to the second translation transmission member.

[0041] Preferred options for the sorting mechanism include the first parallel movement transmission member and the second parallel movement transmission member being a rack, rope, belt, or chain, respectively.

[0042] A preferred option for the sorting mechanism is that the parallel movement guide rail is a horizontal guide rail. The axles of the first parallel movement drive wheel, the second parallel movement drive wheel, the first parallel movement driven wheel, and the second parallel movement driven wheel all extend vertically. The first parallel movement transmission unit and the second parallel movement transmission unit are provided on both sides of the parallel movement guide rail in the horizontal width direction of the parallel movement guide rail, respectively.

[0043] As a preferred option for the sorting mechanism, a receiving station is provided in the center of the parallel-moving guide rail in the direction of extension of the parallel-moving guide rail for the first and second trolleys to receive the sorted items. The ends of the parallel-moving guide rail in the direction of extension are the first guide rail end and the second guide rail end, respectively. The first parallel-moving drive wheel and the first parallel-moving driven wheel are provided at the first guide rail end and at one end spaced away from the first guide rail end at the receiving station, respectively. The second parallel-moving drive wheel and the second parallel-moving driven wheel are provided at the second guide rail end and at one end spaced away from the second guide rail end at the receiving station, respectively. The motion strokes of the first and second trolleys overlap at the receiving station.

[0044] As a preferred option for the sorting mechanism, the first assembly further includes a first translation frame. The first translation frame is connected to a first translation transmission unit. The first carriage is connected to the first translation frame via a first lifting transmission unit. The first lifting transmission unit is used to move the first carriage up and down. The second assembly further includes a second translation frame. The second translation frame is connected to a second translation transmission unit. The second carriage is connected to the second translation frame via a second lifting transmission unit. The second lifting transmission unit is used to move the second carriage up and down.

[0045] As a preferred option for the sorting mechanism, the first assembly includes a first lifting drive source. The first lifting transmission unit includes a first lifting drive wheel, a first lifting driven wheel, and a first lifting transmission member provided on the first translation frame. The first lifting transmission member rotates when driven by the first lifting drive source. The first carriage is connected to the first lifting transmission member. The second assembly includes a second lifting drive source. The second lifting transmission unit includes a second lifting drive wheel, a second lifting driven wheel, and a second lifting transmission member provided on the second translation frame. The second lifting transmission member rotates when driven by the second lifting drive source. The second carriage is connected to the second lifting transmission member.

[0046] A preferred option for the sorting mechanism is that the first and second trolleys each include one trolley frame. The trolley frame is provided with two sorting rollers, and a sorting conveying belt is provided between the two sorting rollers.

[0047] A preferred option for the sorting mechanism is that the sorting rollers are rotated by the drive of a transport drive source. Alternatively, the sorting rollers are electric rollers.

[0048] A preferred option for the sorting mechanism is that multiple barrier bars are provided at intervals on the outer surface of the sorting conveyor belt.

[0049] The present invention further provides a feeding device including a feeding frame and a plurality of feeding belt conveying mechanisms attached to the feeding frame. Each feeding belt conveying mechanism includes a supply drive source attached to the feeding frame, a drive roller and a driven roller rotatably mounted on the feeding frame, and a feeding belt connected to the outer circumference of the drive roller and the driven roller. The supply drive source is connected to transmit power to the drive roller. The supply drive sources of the plurality of feeding belt conveying mechanisms are independent of each other. In the conveying direction of the feeding belt, the plurality of feeding belt conveying mechanisms are connected in sequence and distributed in a stepped manner from high to low. Also, two adjacent feeding belt conveying mechanisms are arranged adjacent to each other. The plurality of feeding belt conveying mechanisms in the present invention are driven by independent supply drive sources. Therefore, the conveying speed of the feeding belt of each feeding belt conveying mechanism is controlled independently. This allows for better control of the buffering of sorted materials on the plurality of feeding belt conveying mechanisms, avoiding the situation in which sorted materials accumulate excessively at the front end of the feeding device, and improving the efficiency of the device. Furthermore, in this invention, multiple input belt conveying mechanisms are arranged in a stepped configuration. The height of the multiple input belt conveying mechanisms decreases sequentially from rear to front. That is, two adjacent input belt conveying mechanisms are offset vertically, allowing them to be positioned more closely together. This reduces the gap between two adjacent input belt conveying mechanisms, preventing items from falling. Moreover, by arranging the multiple input belt conveying mechanisms in a stepped configuration from high to low, it is possible to prevent light items being sorted from bouncing up.

[0050] As a preferred option for the input and supply device, each input belt conveying mechanism further includes a detection unit mounted on the input and supply frame. The detection unit is used to detect whether or not there is anything passing on the supply conveying belt of the input belt conveying mechanism.

[0051] As a preferred option for the input / supply device, the input / supply frame includes a base frame and a pair of base guard plates fixed to the upper end of the base frame. The pair of base guard plates are distributed so as to face both sides of the supply conveyor belts of the plurality of input belt conveying mechanisms in a direction perpendicular to the conveying direction of the supply conveyor belts, and are higher than the supply conveyor belts of the plurality of input belt conveying mechanisms. The detection unit includes a grating sensor fixed to the outside of the base guard plates and a detection opening provided in the base guard plates. The detection opening allows exposure of the grating sensor.

[0052] As a preferred option for the input and supply device, in each input belt conveying mechanism, the bottom of the detection opening and the top of the supply conveying belt are aligned.

[0053] A preferred option for the input and supply device is that a receiving and retraction area is provided at the tip of the base guard plate in the conveying direction of the supply conveying belt.

[0054] A preferred option for the feeding device is that the feeding drive source is a motor, distributed offset from the drive rollers. Furthermore, each feeding belt conveying mechanism includes a transmission unit. The feeding drive source is connected to the drive rollers via the transmission unit.

[0055] A preferred option for the feeding device is the transmission unit, which includes a third drive pulley fixed to the motor shaft of the supply drive source, a third driven pulley fixed to the end of the drive roller, and a transmission belt connected to the outer circumference of the third drive pulley and the third driven pulley.

[0056] As a preferred option for the feed and supply device, each feed and belt conveying mechanism further includes an adjustment unit. The adjustment unit includes an adjustment groove opened in the feed and supply frame, an adjustment plate fixed to the feed and supply frame, and an adjustment screw rotatably inserted into the adjustment plate. Both the adjustment groove and the adjustment screw extend parallel to the conveying direction of the feed and conveying belt. The driven roller includes a roller shaft and a roll mounted on the outer circumference of the roller shaft so as to rotate. Both ends of the roller shaft are engaged in the adjustment groove and screwed into the adjustment screw.

[0057] The present invention further provides an input supply frame with a conveying assembly mounting area, and an input supply device including a plurality of input belt conveying mechanisms attached to the conveying assembly mounting area. The plurality of input belt conveying mechanisms are arranged front to back along the conveying direction. Each input belt conveying mechanism includes a supply drive source, a pair of supply rollers arranged front to back along the conveying direction, and a supply conveying belt connected to the outer circumference of the pair of supply rollers. The supply rollers are rotatably supported on the input supply frame and connected to transmit power to the supply drive source. A substantially triangular region is formed between two front to back adjacent input belt conveying mechanisms. The supply rollers are small-diameter rollers with a diameter of 40 mm or less. In the present invention, the upper end of the supply conveying belt is supported by a pair of supply rollers, thereby providing the supply conveying belt with a conveying plane for horizontally conveying the sorted items forward. In particular, small-diameter rollers with a diameter of 40 mm or less are used for the supply rollers. This significantly reduces the size of the roughly triangular area formed between two adjacent input belt conveying mechanisms, making the connection between the two mechanisms flatter. This effectively prevents small objects from getting stuck in the roughly triangular area, thus ensuring that objects conveyed forward by the rear input belt conveying mechanism are smoothly transferred to the front input belt conveying mechanism. This greatly reduces the probability of objects falling, ultimately guaranteeing the reliability and accuracy of sorting.

[0058] A preferred option for the feeding device is a feeding roller with a diameter of 28 to 32 mm.

[0059] A preferred option for the feed-in / feed-out device is a motor as the feed-in / feed-out drive source. Each feed-in / feed-out belt conveying mechanism further includes a transmission roller rotatably supported on a feed-in / feed-out frame, a first pulley fixed to the motor shaft of the feed-in / feed-out drive source, a second pulley fixed to the transmission roller, and a pulley-driven timing belt connected between the first and second pulleys. The transmission roller is in contact with the inner circumferential surface of the feed-in / feed-out belt and is distributed below the pair of feed rollers. The diameter of the transmission roller is greater than the diameter of the feed roller.

[0060] A preferred option for the feeding device is to have a motor mounting area formed on the outer circumference of the feeding conveyor belt between one of the pair of feeding rollers and the transmission roller. The feeding drive source is located in the motor mounting area and is fixed to the feeding frame.

[0061] As a preferred option for the feeding device, each feeding belt conveying mechanism further includes a tension adjustment roller and a tension adjustment assembly. The tension adjustment roller includes a roller shaft and a tension drum rotatably attached to the roller shaft. The tension drum contacts the outer surface of the feeding conveying belt. The roller shaft is attached to the feeding frame via the tension adjustment assembly so as to be movable back and forth.

[0062] A preferred option for the input and supply device is that the outer surface of the supply conveying belt is provided with at least one position-regulating rib extending in the circumferential direction. If there are multiple position-regulating ribs, the multiple position-regulating ribs are arranged left to right in a direction perpendicular to the conveying direction of the input belt conveying mechanism.

[0063] A preferred option for the input and supply device is that multiple conveying assembly mounting areas are provided in the input and supply frame. These multiple conveying assembly mounting areas are arranged left to right in a direction perpendicular to the conveying direction of the input belt conveying mechanism. Multiple input belt conveying mechanisms are mounted in each of these conveying assembly mounting areas.

[0064] The present invention further provides a sorting trolley including a trolley frame. The trolley frame is provided with two sorting rollers that are parallel to each other. A sorting conveyor belt is provided between the two sorting rollers. The trolley frame further includes two lateral position regulating stoppers. The lateral position regulating stoppers extend along the length direction of the sorting conveyor belt. The two lateral position regulating stoppers are provided on both sides of the sorting conveyor belt in the width direction of the sorting conveyor belt, and a first opening and a second opening are formed between the two lateral position regulating stoppers and the ends of the sorting conveyor belt, respectively. The sorting trolley further includes a main position regulating stopper for blocking objects to be sorted placed on the sorting conveyor belt from passing through the first opening and / or the second opening. By providing the main position regulating stopper, a sorting trolley is provided that has the function of preventing objects to be sorted from falling. As a result, assuming that objects to be sorted are received and loaded normally, sorting efficiency is greatly improved because objects to be sorted will not fall from the sorting trolley.

[0065] A preferred option for the sorting cart is that the main position regulating stopper is provided on the sorting conveyor belt. In this case, the main position regulating stopper includes a plurality of barrier bars provided at intervals along the length of the sorting conveyor belt.

[0066] As a preferred option for the sorting trolley, the main position regulating stopper is provided on the trolley frame. In this case, the main position regulating stopper includes two blocking units. The two blocking units are provided on the first and second opening portions, respectively. Each blocking unit includes a position regulating gate and a stopper drive source. The stopper drive source is used to move the position regulating gate closer to or further away from the first or second opening.

[0067] A preferred option for the sorting cart is that the stopper drive source is either a linear displacement stopper drive source or a rotation stopper drive source.

[0068] As a preferred option for sorting carts, each barrier unit includes two of the position-regulating gates and two of the stopper drive sources.

[0069] A preferred option for the sorting cart is that the cart frame is further provided with multiple running wheels.

[0070] The present invention further provides a sorting trolley comprising a trolley frame, a pair of sorting rollers rotatably mounted on the trolley frame, a sorting conveyor belt connected to the outer circumference of the pair of sorting rollers, a pair of lateral position regulating stoppers distributed on both sides of the sorting conveyor belt in a direction perpendicular to the conveying direction of the sorting conveyor belt, a pair of main position regulating stoppers distributed at both ends of the sorting conveyor belt in the conveying direction of the sorting conveyor belt, and a stopper lifting drive source and a stopper lifting transmission unit mounted on the trolley frame. The pair of lateral position regulating stoppers and the pair of main position regulating stoppers are mounted on the trolley frame. The pair of main position regulating stoppers are mounted on the trolley frame so as to be liftable. The stopper lifting drive source is connected to transmit power to the pair of main position regulating stoppers via the stopper lifting transmission unit, causing the pair of main position regulating stoppers to be raised and lowered synchronously. In the present invention, the objective of cost reduction is achieved by raising and lowering two main position regulating stoppers simultaneously and synchronously using one stopper lifting drive source. Furthermore, in this invention, the movement method of the main position regulating stopper is set to vertical movement, that is, vertical movement. In this case, compared to the movement method of reversing vertically in the prior art, the requirement for the space above the main position regulating stopper is lower, so that the sorting cart can be attached to the sorting system more easily.

[0071] A preferred option for the sorting cart is that the stopper lifting drive source is a motor. The stopper lifting transmission unit includes a first transmission assembly connected to transmit power to the motor shaft of the stopper lifting drive source, and a second transmission assembly connected to transmit power to each main position regulating stopper. Both of the second transmission assemblies are connected to transmit power to the first transmission assembly.

[0072] As a preferred option for the sorting cart, the second transmission assembly includes a transmission rotating shaft rotatably supported on the cart frame. The first transmission assembly is distributed outside one of the lateral position regulating stoppers. The first transmission assembly also includes a fourth drive pulley fixed to the motor shaft of the stopper lifting drive source, a fourth driven pulley fixed to the transmission rotating shaft of each second transmission assembly, and a third timing belt. The third timing belt is connected to the outer circumference of the fourth drive pulley and the two fourth driven pulleys.

[0073] As a preferred option for a sorting trolley, the first transmission assembly further includes a motor mounting frame, a tension adjustment groove provided in the motor mounting frame, and a tension adjustment bolt inserted into the tension adjustment groove. The stopper lifting drive source is fixed to the motor mounting frame. The motor mounting frame is fastened to the trolley frame by the tension adjustment bolt. The tension adjustment groove is an elliptical groove.

[0074] As a preferred option for the sorting trolley, the first transmission assembly further includes two idler gears rotatably mounted on the trolley frame. The two idler gears are distributed on both sides of the fourth drive pulley and both abut against the outside of the third timing belt.

[0075] As a preferred option for the sorting cart, each of the second transmission assemblies includes two lead screws distributed at both ends of a main position regulating stopper, a lead nut connected to the lead screws, a fifth driven pulley fixed to each lead screw, and a fourth timing belt. Both of the lead screws are mounted vertically and rotatably attached to the cart frame. One of the lead screws is connected to the first transmission assembly. The fourth timing belt is connected to the outer circumference of the two fifth driven pulleys in the second transmission assembly. The lead nut is connected to the main position regulating stopper.

[0076] A preferred option for the sorting cart is that a fitting gap is provided between the feed nut and the main position regulating stopper. Furthermore, a connecting bolt is fixed to the feed nut. The connecting bolt is attached to the main position regulating stopper via a thrust bearing.

[0077] As a preferred option for the sorting cart, both the lateral position regulating stopper and the main position regulating stopper are plate members. In the distribution direction of the pair of lateral position regulating stoppers, the main position regulating stopper covers the region between the pair of lateral position regulating stoppers.

[0078] The present invention further provides a dropping mechanism including a sliding tank bottom plate fixed to the frame. The sliding tank bottom plate has a first side close to the sorting trolley and a second side away from the sorting trolley. The height of the first side is greater than the height of the second side. Furthermore, a flexible stopper is provided on the first side. By providing a flexible stopper on the side of the sliding tank bottom plate close to the sorting trolley and reducing the distance between the two, a fall prevention effect is achieved, thereby ensuring efficient operation of the sorting device. In addition, the flexible stopper reduces the distance between the first side of the sliding tank bottom plate and the sorting trolley, and the flexible stopper itself also has a certain load-carrying capacity. Therefore, if an object to be sorted, lowered from the sorting trolley, falls onto the flexible stopper, the load-carrying performance of the flexible stopper can also ensure that the object to be sorted enters the sliding tank bottom plate, thus ensuring the smooth completion of the dropping process.

[0079] A preferred option for the dropping mechanism is that when the sorting cart attempts to lower the items to be sorted, which are placed on it, onto the bottom plate of the sliding tank, the height of the sorting cart is higher than the height of the first side.

[0080] A preferred option for the dropping mechanism is that multiple slide tank guard plates are provided at intervals on the upper surface of the slide tank bottom plate, and a dropping slide tank is formed between two adjacent slide tank guard plates and the slide tank bottom plate. The sorting cart lowers the items to be sorted that are placed on it into the designated dropping slide tank.

[0081] As a preferred option for the drop mechanism, the flexible stopper includes several flexible pads.

[0082] As a preferred option for the drop mechanism, the flexible stopper includes a plurality of flexible strips. The plurality of flexible strips are provided at intervals along the first side.

[0083] As a preferred option for the dropping mechanism, the bottom plate of the slide tank includes a main plate body and a bent portion connected to form an L shape. The main plate body includes a first side and a second side. The first side is connected to the bent portion. Multiple spaced through holes are provided at the connection point between the main plate body and the bent portion. Furthermore, a pressing plate is provided below the main plate body. The pressing plate includes a first plate body and a second plate body connected to form an L shape. The first plate body has multiple sets of insertion holes provided at intervals along the length of the first plate body. Each set of insertion holes includes a first insertion hole and a second insertion hole provided at intervals along the width of the first plate body. One end of the flexible strip is inserted sequentially through the through holes, the second insertion hole and the first insertion hole to form a U shape. The second plate body is detachably connected to the bent portion.

[0084] As a preferred option for the drop mechanism, the second plate body is provided with connecting holes, and the bent portion is provided with fastening elongated holes. The connection holes and fastening elongated holes are connected by a tightening member.

[0085] As a preferred option for the drop mechanism, the bottom of the main plate body is further provided with a number of reinforcing ribs.

[0086] As a preferred option for the drop mechanism, the flexible stopper is made of silicone or rubber. [Brief explanation of the drawing]

[0087] [Figure 1] Figure 1 is a schematic diagram of Embodiment 1 of the central supply sorting system in the present invention. [Figure 2] Figure 2 is a plan view of Figure 1. [Figure 3] Figure 3 is a schematic diagram of the assembly of the sorting trolley in a fixed frame when a single trolley structure is adopted as shown in Figure 1. [Figure 4] Figure 4 is a schematic view of Figure 3 from a different angle. [Figure 5] Figure 5 is a schematic diagram of the assembly of sorting trolleys in a fixed frame when a two-car trolley structure is adopted as shown in Figure 1. [Figure 6] Figure 6 is an enlarged view of enclosure A in Figure 5. [Figure 7] Figure 7 is a schematic diagram of the connection between the sorting cart and the parallel movement frame in Figure 5. [Figure 8] Figure 8 is a schematic diagram of the assembly of sorting trolleys in a fixed frame when a four-car trolley structure is adopted as shown in Figure 1. [Figure 9] Figure 9 is a schematic diagram of the assembly of the four sorting carts and four sorting transmission mechanisms shown in Figure 8. [Figure 10] Figure 10 is a schematic diagram of the connection between the sorting cart and the parallel movement frame in Figure 8. [Figure 11] Figure 11 is a schematic diagram of Embodiment 2 of the central supply sorting system in the present invention, in which the receiving device is omitted. [Figure 12] Figure 12 is a schematic diagram of Embodiment 3 of the central supply sorting system in the present application, with the receiving device omitted. [Figure 13] Figure 13 is a plan view of Figure 12. [Figure 14] Figure 14 is a schematic diagram of the structure of Embodiment 1 of the input and supply device in this application. [Figure 15] Figure 15 is a front view of the multiple input belt conveying mechanisms shown in Figure 14. [Figure 16] Figure 16 is a schematic diagram of the structure of Embodiment 2 of the input and supply device in this application. [Figure 17] Figure 17 is a perspective view of two input belt conveying mechanisms assembled in one conveying assembly mounting area in Figure 16. [Figure 18] Figure 18 is a perspective view of Figure 17 from a different angle. [Figure 19] Figure 19 is a perspective view of Figure 18 with the base guard plate, power supply, first pulley, and pulley transmission timing belt omitted. [Figure 20] Figure 20 is a schematic diagram of the connection point between two adjacent input belt conveying mechanisms in Figure 16. [Figure 21] Figure 21 is a schematic diagram of the first embodiment of the sorting cart in this application. [Figure 22] Figure 22 is a cross-sectional view of Figure 21. [Figure 23] Figure 23 is a schematic diagram of the second embodiment of the sorting cart in this application. [Figure 24] Figure 24 is a schematic diagram of the sorting cart in Embodiment 3 of the present invention. [Figure 25] Figure 25 is an enlarged view of enclosure B in Figure 24. [Figure 26] Figure 26 is an enlarged view of enclosure C in Figure 24. [Figure 27] Figure 27 is a plan view of Figure 24. [Figure 28] Figure 28 is a side view of Figure 24. [Figure 29] Figure 29 is a schematic diagram of the drop mechanism in this application. [Figure 30] Figure 30 is a side view of Figure 29. [Figure 31] Figure 31 is an enlarged view of enclosure D in Figure 30. [Figure 32]Figure 32 is a schematic diagram of the connection between the flexible stopper, the pressure plate, and the bottom plate of the slide tank in Figure 29. [Figure 33] Figure 33 is a schematic diagram of the bottom plate of the slide tank in Figure 29. [Figure 34] Figure 34 is an enlarged view of enclosure E in Figure 30. [Figure 35] Figure 35 is a schematic diagram of the pressure plate shown in Figure 29. [Figure 36] Figure 36 is a schematic diagram of the flexible strip shown in Figure 29. [Modes for carrying out the invention]

[0088] The embodiments of the present invention will be described below with reference to specific examples, but those skilled in the art will be able to easily understand the other advantages and effects of the present invention from the information disclosed herein.

[0089] The structures, proportions, sizes, etc., shown in the drawings of the present invention are merely for the understanding and review of those skilled in the art in combination with the contents disclosed in the specification, and do not define any limiting conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any additions to the structure, changes in proportions, or adjustments in size shall be considered to fall within the scope covered by the technical contents disclosed in the present invention, provided that they do not affect the effects that can be achieved and the objectives that can be attained by the present invention. Furthermore, terms such as "top," "bottom," "left," "right," "center," and "one" referenced in this specification are merely for clarity and do not limit the scope under which the present invention can be implemented. Therefore, changes or adjustments in relative relationships should also be considered within the scope of the present invention, as long as they do not substantially alter the technical contents.

[0090] Furthermore, it should be explained that when a component is described as being "fixed" or "attached" to another component, it may be located directly on the other component, or an intervening component may be present simultaneously. Also, when one component is described as being "connected" to another component, it may be connected directly to the other component, or it may be connected indirectly to the other component via an intervening component.

[0091] Furthermore, any references to "First," "Second," etc., in this application are merely for convenience and should not be interpreted as explicitly or implicitly indicating relative importance or suggesting the number of technical features covered. Therefore, if the features referred to as "First" or "Second" are limited, they may explicitly or implicitly include at least one such feature. In addition, while the technical means of each embodiment can be combined with each other, it must be assumed that this is feasible for a person skilled in the art. If a combination of technical means results in a contradiction or is impossible to implement, such a combination of technical means should be considered nonexistent and not included in the scope of protection claimed in this application.

[0092] (Example 1 of a central supply sorting system) Embodiment 1 of the central supply sorting system is used to automatically sort multiple packages. As shown in Figures 1 and 2, Embodiment 1 of the central supply sorting system includes a fixed frame 10 that is permanently mounted, a fixed input and supply device 20 that is permanently mounted, at least one sorting cart 30 that is movably mounted on the fixed frame 10, a dropping mechanism 40 that is attached to the fixed frame 10, and a receiving device 50 that is positioned on the outer side of the fixed frame 10. The dropping mechanism 40 has a plurality of dropping slide tanks 41. The plurality of dropping slide tanks 41 are distributed in a matrix in the form of multiple layers vertically and multiple tanks per layer. The sorting cart 30 is capable of reciprocating motion between the input and supply device 20 and the dropping slide tanks 41. The receiving device 50 has a plurality of receiving frames 51 that correspond one-to-one with the dropping slide tanks 41. The shelves of the receiving device 50 are also designed to be pushable.

[0093] Embodiment 1 of the central supply sorting system has a non-end-point supply structure. Specifically, as shown in Figures 1 and 2, a fixed frame 10 is provided with an input supply station 101. An input supply device 20 is provided on the input supply station 101 of the fixed frame 10. Furthermore, on either the different side of the input supply device 20, a drop slide tank 41 and a receiving device 50 are provided on the fixed frame 10. This enables the sorting cart 30 to move to the different side of the input supply station 101 and the sorting items to be transferred after the sorting cart 30 receives the items to be sorted (for example, items such as delivered packages) at the input supply station 101.

[0094] Furthermore, the present invention provides a central supply sorting method that is performed using the above-described central supply sorting system. This central supply sorting method includes the following steps.

[0095] Step S1: Multiple items to be sorted are sequentially placed on the input / supply device 20, and the input / supply device 20 transports the items to be sorted toward the fixed frame 10. In this embodiment, the input / supply device 20 transports the items to be sorted toward the front. Therefore, the input direction of the input / supply device 20 is forward.

[0096] Step S2: The sorting cart 30 moves to the input / supply device 20.

[0097] Step S3: The sorting cart 30 receives the items to be sorted, which have been discharged from the input / supply device 20.

[0098] Step S4: The sorting cart 30 moves to the drop slide tank 41 corresponding to the items to be sorted on the sorting cart 30.

[0099] Step S5: When the sorting cart 30 unloads the items to be sorted, the items are dropped through the drop slide tank 41 into the receiving frame 51 corresponding to the drop slide tank 41. This completes the automatic sorting of one item.

[0100] Step S6: The sorting cart 30 moves and returns to the input / supply device 20.

[0101] Step S7: Steps S3 to S6 are repeated to sequentially complete the automatic sorting of multiple items to be sorted. In other words, in the process of sorting multiple items by repeating steps S3 to S6 multiple times, step S4 is executed multiple times. In step S4, which is executed multiple times, based on the structure in which the drop slide tank 41 and receiving device 50 are provided on the fixed frame 10 on either different sides of the input and supply device 20, it is possible to move the sorting cart 30 toward the drop slide tank 41 distributed on different sides of the input and supply device 20 to transport the items to be sorted. Therefore, unlike the conventional technology, it is not limited to transporting items to be sorted toward the same side of the input and supply device 20.

[0102] In other words, in this invention, the input and supply station 101 and the input and supply device 20 are located at non-end positions in the extension direction of the fixed frame 10, and on either the different sides of the input and supply station 101 and the input and supply device 20, the dropping slide tank 41 and the receiving device 50 are located on the fixed frame 10, resulting in a central supply structure or a non-end supply structure. Compared to the conventional end supply structure in which the input and supply station 101 and the input and supply device 20 are located at one end in the extension direction of the fixed frame 10, assuming the same number of dropping slide tanks 41 are arranged, in this invention the distance the sorting cart 30 moves in the extension direction of the fixed frame 10 during one sorting cycle can be shortened, thus reducing the time required for one sorting cycle. Furthermore, assuming the same travel distance of the sorting cart 30, a larger number of dropping slide tanks 41 can be arranged in this invention. Therefore, ultimately, sorting efficiency can be effectively improved in this invention.

[0103] Furthermore, there can be multiple types of fixed frame 10 configurations. As shown in Figures 1 and 2, in Embodiment 1 of the central supply sorting system, the fixed frame 10 is a straight-line frame that extends in one direction. That is, the fixed frame 10 is straight-line shaped and extends flat in a direction perpendicular to the input direction of the input supply device 20. Therefore, the straight-line shaped fixed frame 10 extends flat along its length. For convenience of description, the extension direction of the straight-line shaped fixed frame 10 is defined as the left-right direction. In other words, the fixed frame 10 extends in the left-right direction. From the viewpoint of Figure 2, the length direction of the fixed frame 10 is the left-right direction of the paper. The width direction of the fixed frame 10 is the front-back direction, which is the up-down direction of the paper from the viewpoint of Figure 2. The height direction of the fixed frame 10 is the up-down direction, which is the front-back direction of the paper from the viewpoint of Figure 2. The input direction of the input supply device 20 is the forward direction.

[0104] As shown in Figures 1 and 2, in the fixed frame 10 with a straight-line structure, the input and supply station 101 is located at the non-end position in the longitudinal direction of the fixed frame 10. That is, the input and supply station 101 and the input and supply device 20 are not located at the left or right end of the fixed frame 10, but rather at a position somewhere between the left and right ends of the fixed frame 10. In the embodiment 1 of the central supply sorting system, sorting subsystems are provided on both the left and right sides of the input and supply station 101 and the input and supply device 20, in a direction perpendicular to the input direction of the input and supply device 20. Each sorting subsystem includes a portion of the fixed frame 10, a drop slide tank 41, and a receiving device 50.

[0105] Furthermore, in Embodiment 1 of the central supply sorting system, there are multiple types of installation positions for the input supply station 101 and input supply device 20 in the longitudinal direction of the fixed frame 10. For example, they may be located in the right-hand portion of the center of the fixed frame 10, in the left-hand portion of the center of the fixed frame 10, or in the center of the fixed frame 10. The specific installation position can be determined based on actual needs. In this embodiment, as shown in Figures 1 and 2, both the input supply station 101 and the input supply device 20 are located in the center of the fixed frame 10 in the longitudinal direction. In addition, in the width direction of the fixed frame 10, the input supply device 20 is located on the rear side of the fixed frame 10. Therefore, the input supply device 20 transports the sorted items toward the front.

[0106] Furthermore, as shown in Figures 1 and 2, in each sorting subsystem, a dropping mechanism 40 is provided on both the front and rear sides of the fixed frame 10 in a direction perpendicular to its extension direction. Specifically, two dropping mechanisms 40 are provided on the front side of the fixed frame 10, distributed on both the left and right sides of the input supply station 101 and the input supply device 20, respectively. Similarly, two dropping mechanisms 40 are provided on the rear side of the fixed frame 10, distributed on both the left and right sides of the input supply station 101 and the input supply device 20, respectively. Each dropping mechanism 40 has multiple dropping slide tanks 41. In addition, one receiving device 50 is positioned on the outer edge in the front-rear direction of each dropping mechanism 40. Therefore, in Embodiment 1 of the central supply sorting system, sorting efficiency is improved because four dropping mechanisms 40 and four receiving devices 50 are provided that cooperate with each other. Based on this structure, as shown in Figures 1 and 2, the fixed frame 10 includes two gantry 103, one at the front and one at the rear, and a plurality of fixed connecting rods 104 fixedly connected between the two gantry 103. Between the two gantry 103, a trolley movement area 102 is formed, which allows the sorting trolley 30 to move. The two front drop mechanisms 40, one on the left and one on the right, are both fixed to the front gantry 103, and the two rear drop mechanisms 40, one on the left and one on the right, are both fixed to the rear gantry 103. Therefore, it can also be said that the trolley movement area 102 is formed between the two front and two drop mechanisms 40 of each sorting subsystem. At least in the central position of the gantry 103, an area constituting the input and supply station 101 is provided.

[0107] Furthermore, in Embodiment 1 of the central supply sorting system, at least one sorting cart 30 is movably mounted between the two front and rear gantry 103 of the fixed frame 10. That is, there may be one, two, four, or more sorting carts 30. The number of sorting carts 30 is determined according to the actual needs. Arranging more sorting carts 30 is advantageous in improving sorting efficiency. Depending on the number of sorting carts 30, Embodiment 1 of the central supply sorting system has multiple structures. Also, in Embodiment 1 of the central supply sorting system, the reciprocating motion of the sorting cart 30 between the input supply device 20 and the drop slide tank 41 is left-right movement and up-down movement. Below, three preferred structures in Embodiment 1 of the central supply sorting system are presented.

[0108] (Example 1 of a central supply sorting system with a single trolley structure) Figure 3 shows an embodiment 1 of the central supply and sorting system in the case of a single cart structure. That is, one sorting cart 30 is provided. The single sorting cart 30 is movable within the areas on both the left and right sides of the input supply station 101 along the length direction of the fixed frame 10. That is, after receiving the items to be sorted from the input supply device 20, the sorting cart 30 can move to the left or to the right.

[0109] Furthermore, the movement mode of a single sorting cart 30 on the fixed frame 10 is left-right movement in the longitudinal direction of the fixed frame 10 and up-down movement in the height direction of the fixed frame 10. Based on this, a single sorting cart 30 is attached to the fixed frame 10 by a single sorting transmission mechanism 60 so as to be able to move left-right and up-down. A preferred structure of the sorting transmission mechanism 60 is shown in Figures 3 and 4, and the sorting transmission mechanism 60 includes a parallel movement guide rail 61 fixed to the fixed frame 10, a parallel movement drive source 62, a parallel movement frame 63 that slides on the parallel movement guide rail 61, a vertical movement drive source 64, and a vertical movement guide rail 65 fixed to the parallel movement frame 63. The parallel movement guide rail 61 extends horizontally to the left and right in the longitudinal direction of the fixed frame 10. In addition, both the left and right ends of the parallel movement guide rail 61 extend to both the left and right ends of the fixed frame 10, respectively. As a result, the parallel movement guide rail 61 spans the two drop mechanisms 40 and the input supply station 101 in the longitudinal direction. The vertical movement guide rail 65 extends vertically in the height direction of the fixed frame 10. The parallel movement drive source 62 is connected to transmit power to the parallel movement frame 63, causing the parallel movement frame 63 to move left and right along the parallel movement guide rail 61. The sorting cart 30 is assembled to slide along the vertical movement guide rail 65. The vertical movement drive source 64 is connected to transmit power to the sorting cart 30, causing the sorting cart 30 to move up and down along the vertical movement guide rail 65. In addition, in the single-cart central supply sorting system, the parallel movement guide rail 61 is positioned in the center between the two gantry 103 in the front and rear direction. The parallel movement frame 63 has a rectangular prism structure.

[0110] Furthermore, as shown in Figures 3 and 4, the parallel movement drive source 62 is a parallel movement drive motor fixed to the ceiling of the fixed frame 10. The longitudinal movement drive source 64 is a longitudinal movement drive motor fixed to the ceiling of the parallel movement frame 63. The parallel movement drive motor is connected to the parallel movement frame 63 via a first timing belt transmission assembly 66. The first timing belt transmission assembly 66 includes a first drive pulley 661 and a first driven pulley 662 rotatably supported on the fixed frame 10, and a first timing belt 663 connected to the outer circumference of the first drive pulley 661 and the first driven pulley 662. The parallel movement drive motor is connected to the first drive pulley 661, and the first timing belt 663 is fixedly connected to the parallel movement frame 63. The axles of both the first drive pulley 661 and the first driven pulley 662 extend vertically. The longitudinal movement drive motor is connected to the sorting cart 30 via a second timing belt transmission assembly 67. The second timing belt transmission assembly 67 includes a second drive pulley 671 and a second driven pulley 672 rotatably supported on a parallel movement frame 63, and a second timing belt 673 connected to the outer circumference of the second drive pulley 671 and the second driven pulley 672. A vertical movement drive motor is connected to the second drive pulley 671, and the second timing belt 673 is fixedly connected to the sorting cart 30. The first drive pulley 661 and the first driven pulley 662 are mounted on the left and right ends of the fixed frame 10, respectively, so that the extension path of the first timing belt 663 covers the input and supply station 101. The second drive pulley 671 and the second driven pulley 672 are mounted on the upper and lower ends of the parallel movement frame 63, respectively, so that the extension path of the second timing belt 673 covers the input and supply station 101. In this way, the movement of the first timing belt 663 moves the parallel movement frame 63 and the sorting cart 30 from side to side, and the movement of the second timing belt 673 moves the sorting cart 30 up and down, thereby enabling the sorting cart 30 to move to the input and supply station 101. In this embodiment, when the sorting cart 30 moves to the front lower end of the input and supply device 20, the input and supply device 20 becomes able to receive the sorted items being discharged forward.

[0111] Preferably, as shown in Figure 3, there are two parallel movement guide rails 61, one above the other. The top of the parallel movement frame 63 is fitted to slide against the upper parallel movement guide rail 61, and the bottom of the parallel movement frame 63 is fitted to slide against the lower parallel movement guide rail 61. The parallel movement drive motor is connected to the parallel movement frame 63 via two upper and lower first timing belt transmission assemblies 66. This improves the stability of the lateral movement of the parallel movement frame 63. The sorting transmission mechanism 60 further includes a first drive pivot shaft 68 that extends vertically and is rotatably mounted on the left side of the fixed frame 10 via a bearing housing. The upper end of the first drive pivot shaft 68 is fixedly connected to the motor shaft of the parallel movement drive motor via a shaft coupling. The first drive pulleys 661 in the two upper and lower first timing belt transmission assemblies 66 are fastened to the first drive pivot shaft 68 by screws.

[0112] Preferably, as shown in Figures 3 and 4, the top and bottom of the parallel movement frame 63 are each fitted with a plurality of rotatable running wheels 610 and a plurality of rotatable guide wheels 611. The axes of the running wheels 610 extend straight in the front-rear direction. The running wheels 610 are assembled within the guide rail grooves of the parallel movement guide rail 61. The axes of the guide wheels 611 extend straight in the up-down direction. The guide wheels 611 contact both the front and rear sides of the parallel movement guide rail 61.

[0113] (Example 1 of a central supply sorting system with a two-car bogie structure) Figure 5 shows an embodiment 1 of the central supply sorting system with a two-cart structure. That is, two sorting carts 30 are arranged. Both sorting carts 30 are movable within the areas on both the left and right sides of the input supply station 101 along the length direction of the fixed frame 10. That is, after receiving the items to be sorted from the input supply device 20, each sorting cart 30 can move to the left or to the right.

[0114] Furthermore, the movement methods of the two sorting carts 30 on the fixed frame 10 are both lateral movement along the length of the fixed frame 10 and vertical movement along the height of the fixed frame 10. Based on this, each sorting cart 30 is attached to the fixed frame 10 so that it can move laterally and vertically by a single sorting transmission mechanism 60. Please refer to Figures 3, 4, and 5. As shown in Figure 5, the structure of each sorting transmission mechanism 60 is similar to the structure of the sorting transmission mechanism 60 in Embodiment 1 of the single-cart central supply sorting system, and includes a fixedly provided parallel movement guide rail 61, a parallel movement frame 63 that slides on the parallel movement guide rail 61, a parallel movement drive source 62 that moves the parallel movement frame 63 left and right along the parallel movement guide rail 61 via two upper and lower first timing belt transmission assemblies 66, a vertical movement guide rail 65 fixed to the parallel movement frame 63, and a vertical movement drive source 64 that moves the sorting cart 30 up and down along the vertical movement guide rail 65 via a second timing belt transmission assembly 67. The first drive pulley 661 and the first driven pulley 662 are assembled to the left and right ends of the fixed frame 10, respectively, so that the extension path of the first timing belt 663 covers the input supply station 101. Furthermore, the second drive pulley 671 and the second driven pulley 672 are assembled to the upper and lower ends of the parallel movement frame 63, respectively, so that the extension path of the second timing belt 673 covers the feed station 101.

[0115] However, as a difference, in Embodiment 1 of the two-car central supply sorting system, as shown in Figure 5, the pair of parallel-moving guide rails 61 in the sorting transmission mechanism 60 connected to one sorting cart 30 are positioned in front of the rear gantry 103 in the front-rear direction. The parallel-moving frame 63 of this sorting transmission mechanism 60 moves left and right adjacent to the front of the rear gantry 103. Also, the pair of parallel-moving guide rails 61 in the sorting transmission mechanism 60 connected to the other sorting cart 30 are positioned in rear of the front gantry 103 in the front-rear direction. The parallel-moving frame 63 of this sorting transmission mechanism 60 moves left and right adjacent to the rear of the front gantry 103. Furthermore, as shown in Figure 7, the parallel-moving frame 63 is a narrow, flat frame in the front-rear direction. The sorting cart 30 has a cantilever-type mounting structure in which its front-rear ends are attached to the parallel-moving frame 63. In the front-to-back direction, the gap between one end of the sorting cart 30 extending from the parallel movement frame 63 and the gantry 103 on the opposite side of the parallel movement frame 63 allows the passage of the parallel movement frame 63 of the other sorting transmission mechanism 60. This ensures that when the two sorting carts 30 are moved independently from side to side and up and down using the two sorting transmission mechanisms 60, the parallel movement frames 63 of the two sorting transmission mechanisms 60 do not interfere with each other. Furthermore, both sorting carts 30 can be moved to the input supply station 101 to receive the sorted items.

[0116] Preferably, as shown in Figure 7, the vertical movement drive motor moves the sorting cart 30 up and down along the vertical movement guide rail 65 via two second timing belt transmission assemblies 67, one on the left and one on the right. The two second timing belt transmission assemblies 67 are mounted on the left and right sides of the parallel movement frame 63, respectively, thereby improving the stability when moving the sorting cart 30, which has a cantilevered mounting structure, up and down. Accordingly, each sorting transmission mechanism 60 further includes a second drive pivot shaft 69 that extends to the left and right and is rotatably mounted on the top of the parallel movement frame 63 via a bearing housing. The right end of the second drive pivot shaft 69 is fixedly connected to the motor shaft of the vertical movement drive motor via a shaft coupling. In addition, the second drive pulleys 671 in the two second timing belt transmission assemblies 67 are fixed and fastened to the second drive pivot shaft 69 with screws.

[0117] Preferably, as shown in Figures 6 and 7, multiple rotatable running wheels 610 and multiple rotatable guide wheels 611 are attached to the top and bottom of each parallel movement frame 63. The axes of the running wheels 610 extend straight in the front-rear direction. The running wheels 610 are mounted in pairs on the same axle. The two running wheels 610 in each pair contact both the front and rear sides of the parallel movement guide rail 61. The axes of the guide wheels 611 extend straight in the up-down direction. The guide wheels 611 contact both the front and rear sides of the parallel movement guide rail 61.

[0118] (Example 1 of a central supply sorting system with a four-car bogie structure) Figures 8 and 9 show an embodiment of the central supply sorting system in the case of a four-car trolley structure. That is, four sorting trolleys 30 are arranged. For convenience of description, the four sorting trolleys 30 are defined as the first sorting trolley 71, the second sorting trolley 72, the third sorting trolley 73, and the fourth sorting trolley 74. In the longitudinal direction of the fixed frame 10, the first sorting trolley 71 and the second sorting trolley 72 are located in the area to the left of the input supply station 101. The first sorting trolley 71 and the second sorting trolley 72 are only movable within the area to the left of the input supply station 101 and are not movable into the area to the right of the input supply station 101. The third sorting trolley 73 and the fourth sorting trolley 74 are located in the area to the right of the input supply station 101. The third sorting cart 73 and the fourth sorting cart 74 are designed to be movable only within the area to the right of the input / supply station 101, and are not movable within the area to the left of the input / supply station 101. This ensures that the four sorting carts 30 do not interfere with each other during the sorting process.

[0119] Furthermore, the movement methods of the four sorting carts 30 on the fixed frame 10 are all lateral movement along the length of the fixed frame 10 and vertical movement along the height of the fixed frame 10. Based on this, each sorting cart 30 is attached to the fixed frame 10 by a single sorting transmission mechanism 60 so that it can move laterally and vertically. As shown in Figures 8 to 10, the structure of each sorting transmission mechanism 60 is similar to the structure of the sorting transmission mechanism 60 in Embodiment 1 of the central supply sorting system with a two-car bogie structure, and includes a fixedly provided parallel movement guide rail 61, a parallel movement frame 63 which is a flat frame and is combined to slide on the parallel movement guide rail 61, a parallel movement drive source 62 which moves the parallel movement frame 63 left and right along the parallel movement guide rail 61 via two upper and lower first timing belt transmission assemblies 66, a vertical movement guide rail 65 fixed to the parallel movement frame 63, and a vertical movement drive source 64 which moves the sorting bogie 30 up and down along the vertical movement guide rail 65 via two left and right second timing belt transmission assemblies 67.

[0120] However, a difference is that in Embodiment 1 of the four-car bogie central supply sorting system, as shown in Figures 8 and 9, the rear end of the first sorting bogie 71 is attached to the left rear parallel movement frame 63, and the rear end of the third sorting bogie 73 is attached to the right rear parallel movement frame 63. The left rear parallel movement frame 63 and the right rear parallel movement frame 63 are aligned in the width direction of the fixed frame 10 (i.e., both are distributed on the rear side of the fixed frame 10), and are distributed on both the left and right sides of the input supply station 101 in the length direction of the fixed frame 10. As a result, the upper ends of the left rear parallel movement frame 63 and the right rear parallel movement frame 63 share the same rear parallel movement guide rail 61, and their lower ends also share the same rear parallel movement guide rail 61. Similarly, the front end of the second sorting bogie 72 is attached to the left front parallel movement frame 63, and the front end of the fourth sorting bogie 74 is attached to the right front parallel movement frame 63. The left front parallel movement frame 63 and the right front parallel movement frame 63 are aligned in the width direction of the fixed frame 10 (i.e., both are distributed on the front side of the fixed frame 10), and are distributed on both the left and right sides of the input supply station 101 in the length direction of the fixed frame 10. As a result, the upper ends of the left front parallel movement frame 63 and the right front parallel movement frame 63 share the same front parallel movement guide rail 61, and their lower ends also share the same front parallel movement guide rail 61. This makes the overall structure of the central supply sorting system compact and reduces costs.

[0121] Furthermore, the two first timing belt transmission assemblies 66 connected to the two parallel movement frames 63 that share the same parallel movement guide rail 61 are offset front to back in the width direction of the fixed frame 10. Taking the left rear parallel movement frame 63 and the right rear parallel movement frame 63, which share the same rear parallel movement guide rail 61, as shown in Figure 9, in the sorting transmission mechanism 60 where the left rear parallel movement frame 63 is located, the first drive pulley 661 is positioned at the left end of the fixed frame 10, and the first driven pulley 662 is positioned at the right end of the input / supply station 101. This ensures that the extension path of the first timing belt 663 in the sorting transmission mechanism 60 covers the input / supply station 101. Moreover, both the first drive pulley 661 and the first driven pulley 662 in the sorting transmission mechanism 60 are positioned on the rear side (i.e., the outer side in the width direction) of the parallel movement guide rail 61. In other words, the first timing belt 663 in the sorting transmission mechanism 60 is distributed on the rear side (i.e., the outer side in the width direction) of the parallel movement guide rail 61. Also, in the sorting transmission mechanism 60 where the right rear parallel movement frame 63 is located, the first drive pulley 661 is located at the right end of the fixed frame 10, and the first driven pulley 662 is located at the left end of the input / supply station 101. As a result, the extension path of the first timing belt 663 in the sorting transmission mechanism 60 is such that it covers the input / supply station 101. Furthermore, both the first drive pulley 661 and the first driven pulley 662 in the sorting transmission mechanism 60 are located on the front side (i.e., the inner side in the width direction) of the parallel movement guide rail 61. In other words, the first timing belt 663 in the sorting transmission mechanism 60 is distributed on the front side (i.e., the inner side in the width direction) of the parallel movement guide rail 61. In this way, interference between the first timing belt transmission assemblies 66 of the two parallel movement frames 63, which move left and right along the same parallel movement guide rail 61, is avoided by shifting them forward and backward.In particular, two parallel-moving frames 63 and sorting carts 30 on them that share the same parallel-moving guide rail 61, or a parallel-moving frame 63 and sorting carts 30 that move along the same parallel-moving guide rail 61, have overlapping movement strokes in the extension direction of the parallel-moving guide rail 61 at the input / supply station 101. As a result, both sorting carts 30 on the two parallel-moving frames 63 can move to the input / supply station 101 to receive goods, thus satisfying the receiving requirements in the case of central supply.

[0122] Preferably, as shown in Figure 10, each parallel movement frame 63 is fitted with a plurality of rotatable running wheels 610 and a plurality of rotatable guide wheels 611 on both its top and bottom. The axes of the running wheels 610 extend straight in the front-to-back direction. The running wheels 610 are mounted in pairs on the same axle. The two running wheels 610 in each pair contact both the front and rear sides of the parallel movement guide rail 61. The axes of the guide wheels 611 extend straight in the up-to-down direction. The guide wheels 611 contact both the front and rear sides of the parallel movement guide rail 61.

[0123] Based on this, the present invention further provides a sorting mechanism in which two sorting trolleys 30 and sorting transmission mechanisms 60 move along the same parallel-movement guide rail 61 without interfering with each other. Thus, Embodiment 1 of the central supply sorting system with a four-truck structure includes two of the sorting mechanisms. Each sorting mechanism includes a parallel-movement guide rail 61 and a first assembly and a second assembly that share the parallel-movement guide rail 61. In the sorting mechanism where the rear parallel-movement guide rail 61 is located, the first assembly includes a first trolley (i.e., a first sorting trolley 71) and a first parallel-movement transmission unit (i.e., a sorting transmission mechanism 60 connected to the first sorting trolley 71). The second assembly includes a second trolley (i.e., a third sorting trolley 73) and a second parallel-movement transmission unit (i.e., a sorting transmission mechanism 60 connected to the third sorting trolley 73). Similarly, in the sorting mechanism where the front parallel-movement guide rail 61 is located, the first assembly includes a first bogie (i.e., a second sorting bogie 72) and a first parallel-movement transmission unit (i.e., a sorting transmission mechanism 60 connected to the second sorting bogie 72). The second assembly also includes a second bogie (i.e., a fourth sorting bogie 74) and a second parallel-movement transmission unit (i.e., a sorting transmission mechanism 60 connected to the fourth sorting bogie 74).

[0124] The sorting mechanism in which the rear parallel movement guide rail 61 is located will be described in more detail. In this sorting mechanism, the parallel movement drive source 62, the first timing belt transmission assembly 66, the first drive pulley 661, the first driven pulley 662, and the first timing belt 663 in the sorting transmission mechanism 60 connected to the first sorting trolley 71 constitute the first parallel movement drive source, the first parallel movement transmission unit, the first parallel movement drive wheel, the first parallel movement driven wheel, and the first parallel movement transmission member of the first assembly, respectively. Furthermore, the parallel movement drive source 62, the first timing belt transmission assembly 66, the first drive pulley 661, the first driven pulley 662, and the first timing belt 663 in the sorting transmission mechanism 60 connected to the third sorting trolley 73 constitute the second parallel movement drive source, the second parallel movement transmission unit, the second parallel movement drive wheel, the second parallel movement driven wheel, and the second parallel movement transmission member of the second assembly, respectively. In this embodiment, both the first and second parallel movement transmission units are timing belt transmission assemblies, but in other embodiments, a sprocket chain assembly, a rack and pinion assembly, etc., may be selected. In the extending direction of the rear parallel movement guide rail 61, a receiving station is provided at the input and supply station 101 in the central part of the parallel movement guide rail 61 for the first sorting cart 71 and the third sorting cart 73 to receive the sorted items. Furthermore, the motion strokes of the first sorting cart 71 and the third sorting cart 73 overlap at the receiving station.

[0125] In addition, the parallel movement frame 63 and the second timing belt transmission assembly 67 of the sorting transmission mechanism 60 connected to the first sorting trolley 71 constitute the first parallel movement frame and the first lifting transmission unit of the first assembly, respectively. Furthermore, the parallel movement frame 63 and the second timing belt transmission assembly 67 of the sorting transmission mechanism 60 connected to the third sorting trolley 73 constitute the second parallel movement frame and the second lifting transmission unit of the second assembly, respectively.

[0126] (Example 2 of the central supply sorting system) Please refer to Figures 1, 2, and 11. As shown in Figure 11, the fixed frame 10 is an L-shaped frame that extends in multiple directions. That is, the fixed frame 10 is L-shaped. Therefore, the fixed frame 10 has bends. The input supply station 101 and the input supply device 20 are both located at the bends of the fixed frame 10 in the direction of extension of the fixed frame 10. In the input direction of the input supply device 20, a sorting subsystem is provided on the opposite side (i.e., the front side) of the input supply device 20. Also, in a direction perpendicular to the input direction of the input supply device 20, a sorting subsystem is provided on the left or right side of the input supply device 20. Therefore, Embodiment 2 of the central supply sorting system has two sorting subsystems. Each sorting subsystem includes a portion of the fixed frame 10, a drop slide tank 41, and a receiving device 50. In the second embodiment of the central supply sorting system shown in Figure 11, the two sorting subsystems are provided on the front and right sides of the input supply station 101 and the input supply device 20, respectively.

[0127] Furthermore, as shown in Figure 11, in each sorting subsystem, drop mechanisms 40 are provided on both sides of the fixed frame 10 perpendicular to its extension direction, and a trolley movement area 102 is formed between the two drop mechanisms 40, allowing the sorting trolley 30 to move. Specifically, in the sorting subsystem located in front of the input / supply station 101 and input / supply device 20, the fixed frame 10 in that section extends straight in the front-rear direction. One drop mechanism 40 is provided on each of the left and right sides of the fixed frame 10 in that section, located in front of the input / supply station 101 and input / supply device 20. In addition, one receiving device 50 is arranged on the left-right outer edge of each drop mechanism 40. The fixed frame 10 in that section includes two left and right gantry 103 and a plurality of fixed connecting rods 104 fixedly connected between the left and right gantry 103. The trolley movement area 102 is formed between the left and right gantry 103. Furthermore, in the sorting subsystem located to the right of the input / supply station 101 and the input / supply device 20, the fixed frame 10 of that section extends horizontally in the left-right direction. On both the front and rear sides of the fixed frame 10 of that section, there is one dropping mechanism 40 located to the right of the input / supply station 101 and the input / supply device 20. In addition, one receiving device 50 is arranged on the outer side in the front-rear direction of each dropping mechanism 40. The fixed frame 10 of that section includes two gantry 103, one at the front and one at the rear, and a plurality of fixed connecting rods 104 fixedly connected between the two gantry 103. The trolley movement area 102 is formed between the two gantry 103. Thus, the input / supply station 101 and the input / supply device 20 are formed at the connection point between the fixed frame 10 extending in the front-rear direction and the fixed frame 10 extending in the left-right direction.

[0128] Naturally, in other embodiments, the fixed frame 10 may be V-shaped, and both the input / supply station 101 and the input / supply device 20 may be provided at the bends of the fixed frame 10 in the extending direction of the fixed frame 10.

[0129] (Example 3 of the central supply sorting system) As shown in Figures 12 and 13, the fixed frame 10 is a T-shaped frame that extends in multiple directions. That is, the fixed frame 10 is T-shaped. Therefore, the fixed frame 10 has bends. The input supply station 101 and the input supply device 20 are both located at the bends of the fixed frame 10 in the direction of extension of the fixed frame 10. In the input direction of the input supply device 20, a sorting subsystem is provided on the opposite side (i.e., the front side) of the input supply device 20. Also, in the direction perpendicular to the input direction of the input supply device 20, sorting subsystems are provided on both the left and right sides of the input supply device 20. Therefore, Embodiment 3 of the central supply sorting system has three sorting subsystems. Each sorting subsystem includes a portion of the fixed frame 10, a drop slide tank 41, and a receiving device 50.

[0130] Furthermore, please refer to Figures 1, 2, 12, and 13. As shown in Figures 12 and 13, in each sorting subsystem, drop mechanisms 40 are provided on both sides of the fixed frame 10 perpendicular to its extension direction, and a trolley movement area 102 is formed between the two drop mechanisms 40, allowing the sorting trolley 30 to move. Specifically, in the sorting subsystem located in front of the input / supply station 101 and input / supply device 20, the fixed frame 10 in that section extends straight in the front-to-back direction. On both the left and right sides of the fixed frame 10 in that section, there is one drop mechanism 40 located in front of the input / supply station 101 and input / supply device 20. In addition, one receiving device 50 is arranged on the left-to-right outer side of each drop mechanism 40. The fixed frame 10 in that section includes two left and right gantry 103 and a plurality of fixed connecting rods 104 fixedly connected between the two left and right gantry 103. The trolley movement area 102 is formed between the two left and right gantry units 103. In the sorting subsystems located to the left and right of the input / supply station 101 and input / supply device 20, the fixed frame 10 in that section extends horizontally in the left-right direction. On both the front and rear sides of the left portion of the fixed frame 10, there is one dropping mechanism 40 located to the left of the input / supply station 101 and input / supply device 20. On both the front and rear sides of the right portion of the fixed frame 10, there is one dropping mechanism 40 located to the right of the input / supply station 101 and input / supply device 20. In addition, one receiving device 50 is arranged on the outer edge in the front-rear direction of each dropping mechanism 40. Both the left portion of the fixed frame 10 and the right portion of the fixed frame 10 include two front and rear gantry units 103 and a plurality of fixed connecting rods 104 fixedly connected between the two front and rear gantry units 103. The trolley movement area 102 is formed between the two front and rear gantry units 103. Therefore, the input and supply station 101 and the input and supply device 20 are formed at the connection point between the fixed frame 10 extending in the front-to-back direction and the fixed frame 10 extending in the left-to-right direction, and are located at the central position of the fixed frame 10 extending in the left-to-right direction.

[0131] Furthermore, in Embodiments 2 and 3 of the central supply sorting system described above, the sorting cart 30 is moved by parallel movement in the extension direction of the fixed frame 10 and by vertical movement. Based on this, it is preferable that the sorting cart 30 has a structure that uses two carts. That is, the sorting cart 30 includes a lateral movement cart that moves in the extension direction of the fixed frame 10 and a lifting cart that moves in the vertical direction. Moreover, one lifting cart and multiple lateral movement carts are arranged on the fixed frame 10 of each sorting subsystem. The multiple lateral movement carts are distributed vertically and correspond to the multiple layers of drop slide tanks 41 in the upper and lower parts of the sorting subsystem. The lifting carts are distributed on the outer periphery of the input supply device 20. During sorting, the lifting carts receive the items to be sorted on the input supply device 20. When the input supply device 20 loads the sorted material onto the lifting trolley, the lifting trolley moves up and down to the lateral moving trolley corresponding to the layer where the target drop slide tank 41 is located, and loads the sorted material onto the lateral moving trolley. Then, when the lateral moving trolley moves to the target drop slide tank 41 and lowers the sorted material, the sorted material is dropped through the drop slide tank 41 into the receiving frame 51 corresponding to the drop slide tank 41.

[0132] Furthermore, the input and supply device 20 used in multiple embodiments of the above-described central supply and sorting system has multiple preferred embodiments.

[0133] (Example 1 of the input / supply device 20) As shown in Figures 14 and 15, Embodiment 1 of the input and supply device 20 includes an input and supply frame 21 and a plurality of input belt conveying mechanisms 22 attached to the input and supply frame 21. The number of input belt conveying mechanisms 22 may be two or three or more, and is determined according to the actual need. The input and supply frame 21 may be fixedly connected to the fixed frame 10, or it may be fixedly attached independently by anchor bolts. The input belt conveying mechanisms 22 convey the items to be sorted forward. Each input belt conveying mechanism 22 includes a supply conveying support base, a pair of supply rollers 222 rotatably mounted on both the front and rear sides of the supply conveying support base, and a supply conveying belt 223 connected to the pair of supply rollers 222. The supply rollers 222 can be driven by an independent supply drive source 221 (e.g., a motor). Alternatively, electric rollers are used for the supply rollers 222. The supply conveying support base is a base frame 211, which will be described later. In the embodiments shown in Figures 14 and 15, a supply drive source 221 is provided in each input belt conveying mechanism 22. The pair of supply rollers 222 in each input belt conveying mechanism 22 are a drive roller 2221 and a driven roller 2222, respectively. The supply drive source 221 is connected to transmit power to the drive roller 2221. The supply drive sources 221 of the multiple input belt conveying mechanisms 22 are independent of each other. In the conveying direction in which the supply conveying belt 223 conveys the sorted items forward, the multiple input belt conveying mechanisms 22 are connected sequentially from rear to front and are distributed in a stepped manner from high to low. Therefore, the input belt conveying mechanism 22 located furthest back is the highest, and the input belt conveying mechanism 22 located furthest forward is the lowest. Also, two input belt conveying mechanisms 22 adjacent to each other are arranged next to each other.

[0134] In Embodiment 1 of the input and supply device 20, each input belt conveying mechanism 22 is driven by an independent supply drive source 221. Therefore, the conveying speed of the supply conveying belt 223 of each input belt conveying mechanism 22 is controlled independently. This allows for better control of the buffering of sorted materials on the multiple input belt conveying mechanisms 22, thereby preventing excessive accumulation of sorted materials at the front end of the input and supply device 20 and improving the efficiency of the device. Furthermore, in this invention, the multiple input belt conveying mechanisms 22 are arranged in a stepped manner. In addition, the height of the multiple input belt conveying mechanisms 22 decreases sequentially from rear to front. That is, two adjacent input belt conveying mechanisms 22 are offset vertically, allowing for better adjacent placement of the two adjacent input belt conveying mechanisms 22. This reduces the gap between two front-to-back adjacent input belt conveying mechanisms 22, preventing materials from falling. Furthermore, by arranging the multiple input belt conveying mechanisms 22 in a stepped manner from high to low, it is possible to avoid the formation of a groove in the central part of the supply conveying belt 223. This prevents the problem of light items to be sorted bouncing up on the supply conveying belt 223, and ensures reliable supply.

[0135] Preferably, the number of input belt conveying mechanisms 22 in the input supply device 20 is determined according to the actual needs and may be two, three, or four or more. In the embodiment shown in Figure 14, there are three input belt conveying mechanisms 22.

[0136] Furthermore, a preferred structure for the input supply frame 21, as shown in Figure 14, includes a base frame 211 and a pair of base guard plates 212 fixed to the upper end of the base frame 211. The pair of base guard plates 212 are distributed so as to face the left and right sides of the supply conveying belt 223 of the multiple input belt conveying mechanisms 22 in a direction perpendicular to the conveying direction of the supply conveying belt 223. In addition, the base guard plates 212 are further higher than the supply conveying belt 223 of the multiple input belt conveying mechanisms 22. By providing the base guard plates 212, it is possible to prevent the sorted items on the supply conveying belt 223 from falling from either the left or right side, thereby improving the reliability of transporting the sorted items forward.

[0137] Furthermore, as shown in Figure 14, each input belt conveying mechanism 22 includes a detection unit attached to the input supply frame 21. The detection unit is used to detect whether or not there are items to be sorted passing on the supply conveying belt 223 of the input belt conveying mechanism 22. This makes it possible to detect when the first item to be sorted is passing forward on the input supply device 20, and when the last item to be sorted is passing forward, and to use this for sorting start control and sorting stop control. It is also possible to detect the length of the items to be sorted being conveyed on the input supply device 20, and if the length of the items to be sorted exceeds a threshold, it is determined to be an incorrect input. In this case, a warning is issued to improve safety during operation.

[0138] Preferably, as shown in Figure 14, the detection unit includes a grating sensor 23 fixed to the outside of the base guard plate 212 and a detection opening 213 opened in the base guard plate 212. The detection opening 213 allows the grating sensor 23 to be exposed. In addition, in each input belt conveying mechanism 22, the bottom of the detection opening 213 and the top of the supply conveying belt 223 are aligned, making it possible to more reliably detect whether or not there are items to be sorted passing on the supply conveying belt 223.

[0139] Furthermore, as shown in Figure 14, in the transport direction in which the supply transport belt 223 transports the sorted items forward, a receiving and retraction area 214 is provided at the tip (i.e., the front end) of the base guard plate 212. This prevents the base guard plate 212 from obstructing the receiving of sorted items by the sorting cart 30 of the sorting system.

[0140] Furthermore, as shown in Figure 14, the supply drive source 221 is distributed offset from the drive roller 2221. In addition, each input belt conveying mechanism 22 includes a transmission unit. The supply drive source 221 is connected to the drive roller 2221 via the transmission unit. The offset distribution of the supply drive source 221 and the drive roller 2221 allows for a reduction in the left-right dimensions of the input feeding device 20, making it convenient for installation in a sorting system. Preferably, the transmission unit includes a third drive pulley 224 fixed to the motor shaft of the supply drive source 221, a third driven pulley 225 fixed to the end of the drive roller 2221, and a transmission belt 226 connected to the outer circumference of the third drive pulley 224 and the third driven pulley 225.

[0141] Furthermore, as shown in Figures 14 and 15, each input belt conveying mechanism 22 includes an adjustment unit. The adjustment unit includes an adjustment groove 215 opened in the input supply frame 21, an adjustment plate 24 fixed to the input supply frame 21, and an adjustment screw 25 rotatably inserted into the adjustment plate 24. Both the adjustment groove 215 and the adjustment screw 25 extend straight back and forth along the conveying direction of the supply conveying belt 223. The driven roller 2222 includes a roller shaft 2223 and a roll attached to the outer circumference of the roller shaft 2223 so as to rotate. Both ends of the roller shaft 2223 are engaged in the adjustment groove 215 and screwed into the adjustment screw 25. By rotating the adjustment screw 25, the front-to-back position of the roller shaft 2223 of the driven roller 2222 within the adjustment groove 215 can be adjusted. In other words, by adjusting the front-to-back position of the driven roller 2222, the tension of the supply conveying belt 223 in the input belt conveying mechanism 22 can be adjusted, making it possible to more reliably convey the sorted items forward.

[0142] (Example 2 of the input / supply device 20) As shown in Figure 16, Embodiment 2 of the input and supply device 20 includes an input and supply frame 21 provided with a transport assembly mounting area 216, and a plurality of input belt transport mechanisms 22 attached to the transport assembly mounting area 216. The transport direction of the input belt transport mechanisms 22 is the transport direction of the input and supply device 20, and is also the forward direction. The plurality of input belt transport mechanisms 22 are arranged front to back along the transport direction. The number of input belt transport mechanisms 22 attached to one transport assembly mounting area 216 is determined according to the actual need and may be two, three, or four or more. In the embodiment shown in Figure 16, two input belt transport mechanisms 22 are attached to one transport assembly mounting area 216.

[0143] As shown in Figures 17 to 20, the input supply frame 21 has base guard plates 212 fixed to both the left and right sides of the conveying assembly mounting area 216. The base guard plates 212 are part of the input supply frame 21. Each input belt conveying mechanism 22 includes a supply drive source 221, a pair of supply rollers 222 arranged front to back along the conveying direction, and a supply conveying belt 223 connected to the outer circumference of the pair of supply rollers 222. The arrangement height of the pair of supply rollers 222 is the same. Therefore, the supply conveying belt 223 has a conveying plane connected to the upper ends of the pair of supply rollers 222. Both the left and right ends of the supply rollers 222 are rotatably supported by the base guard plates 212 of the input supply frame 21 and are connected to transmit power to the supply drive source 221. A roughly triangular area 218 is formed between two front to back adjacent input belt conveying mechanisms 22. The supply rollers 222 are small-diameter rollers with a diameter of 40 mm or less. In other words, the supply roller 222 is a roller with an unusual outer diameter, and a small-diameter roller that is much smaller than the typical outer diameter is used.

[0144] In the input and supply device 20 according to the present invention, when the supply drive source 221 is operated, a pair of supply rollers 222 rotate, and at the same time, the supply conveying belt 223 also rotates. The sorting person places multiple items to be sorted, which are awaiting sorting, onto the conveying surface of the supply conveying belt 223 in the input belt conveying mechanism 22 at the rearmost end of the input and supply device 20. The supply conveying belt 223 of the input belt conveying mechanism 22 conveys the items to be sorted toward the front. In particular, the supply rollers 222 in the present invention are small-diameter rollers with a diameter of 40 mm or less. By doing so, the size of the roughly triangular region 218 formed between two adjacent input belt conveying mechanisms 22 is greatly reduced, making the connection between the two adjacent input belt conveying mechanisms 22 flatter. This effectively prevents small objects to be sorted from getting stuck in the roughly triangular area 218, thus ensuring that objects transported forward by the rear input belt transport mechanism 22 are smoothly transferred to the front input belt transport mechanism 22. This significantly reduces the probability of objects falling, ultimately guaranteeing the reliability and accuracy of sorting. Finally, the objects to be sorted are transported forward by the supply transport belts 223 of the multiple input belt transport mechanisms 22, and then transported to the front end of the input supply device 20. After that, the objects to be sorted are received by the sorting cart 30. Thus, the rear end of the input supply device 20 is the supply end of the objects to be sorted, and the front end of the input supply device 20 is the discharge end of the objects to be sorted.

[0145] In this embodiment of the input and supply device 20, each of the multiple input belt conveying mechanisms 22 uses an independent supply drive source 221. Therefore, the conveying speed of the supply conveying belt 223 of each input belt conveying mechanism 22 is controlled independently. This allows for better control of the buffering of sorted materials on the multiple input belt conveying mechanisms 22, thereby preventing excessive accumulation of sorted materials at the front end of the input and supply device 20 and improving the efficiency of the device.

[0146] Preferably, the diameter of the supply roller 222 in this application is 28 to 22 mm. This effectively prevents small-volume items to be sorted from getting caught in the roughly triangular area 218, while also providing good support performance for the supply conveyor belt 223.

[0147] Furthermore, if a small-diameter roller is used for the supply roller 222, the contact area between the supply roller 222 and the supply conveying belt 223 will inevitably decrease. In other words, the frictional force between the supply roller 222 and the supply conveying belt 223 will inevitably decrease. Therefore, if a structure is used in which the supply drive source 221 rotates the supply roller 222 and rotates the supply conveying belt 223, there is a drawback that the rotational speed of the supply conveying belt 223 may not meet the requirements. For this reason, the drive structure in which the supply drive source 221 rotates the supply conveying belt 223 in this application is preferably as follows. That is, as shown in Figures 17 to 20, the supply drive source 221 is a motor. Furthermore, each input belt conveying mechanism 22 includes a transmission roller 26, a first pulley 271 fixed to the motor shaft of the supply drive source 221, a second pulley 272 fixed to the transmission roller 26, and a pulley transmission timing belt 273 connected between the first pulley 271 and the second pulley 272. The transmission roller 26 is parallel to the supply roller 222. Both ends of the transmission roller 26 are rotatably supported by the base guard plate 212 of the feed supply frame 21. The transmission roller 26 is a roller with an unusual outer diameter. The diameter of the transmission roller 26 is larger than the diameter of the supply roller 222. Preferably, the diameter of the transmission roller 26 is 3 to 5 times the diameter of the supply roller 222. The transmission roller 26 is in contact with the inner circumferential surface of the supply conveyor belt 223 and is distributed below the pair of supply rollers 222. In this way, the supply drive source 221 rotates the transmission roller 26 via the first pulley 271, the second pulley 272 and the pulley transmission timing belt 273. Because there is a large contact area and a large frictional force between the transmission roller 26 and the supply conveyor belt 223, the transmission roller 26 can cause the supply conveyor belt 223 to rotate. This improves the reliability of the rotational motion of the supply conveyor belt 223, ensuring accurate transport of sorted items forward, while also guaranteeing that the rotational speed of the supply conveyor belt 223 meets the design requirements.

[0148] Furthermore, as shown in Figures 17 and 19, a motor mounting area 28 is formed on the outer circumference of the supply conveyor belt 223 between one of the pair of supply rollers 222 and the transmission roller 26. The supply drive source 221 is located in the motor mounting area 28 and is fixed to the base guard plate 212 of the input supply frame 21. This makes it easier to install the supply drive source 221, makes the overall structure more compact, and reduces the space occupied by the entire input supply device 20.

[0149] Furthermore, as shown in Figures 17 to 19, each input belt conveying mechanism 22 includes a tension adjustment roller 29 and a tension adjustment assembly. The tension adjustment roller 29 is located in the motor mounting area 28. The tension adjustment roller 29 and the transmission roller 26 are parallel. The tension adjustment roller 29 includes a roller shaft portion 291 and a tension drum portion 292 that is rotatably attached to the roller shaft portion 291. The tension drum portion 292 contacts the outer circumferential surface of the supply conveying belt 223. The roller shaft portion 291 is attached to the input supply frame 21 so as to be movable back and forth via the tension adjustment assembly. In this way, by adjusting the front-to-back position of the roller shaft portion 291 by the tension adjustment assembly, the front-to-back position of the tension adjustment roller 29 is adjusted, thereby adjusting the degree of tension of the supply conveying belt 223. Preferably, a bolt and nut structure can be used for the tension adjustment assembly. The tension adjustment assembly includes an adjustment base 217 fixed to the feed supply frame 21, an adjustment groove 2171 opening in the feed supply frame 21 and extending in the front-rear direction, an adjustment bolt extending in the front-rear direction, and a lock nut connected to the adjustment bolt. The adjustment bolt and lock nut are not shown. The roller shaft portion 291 is inserted into the adjustment groove 2171 so as to be movable in the front-rear direction. The adjustment bolt is inserted into the roller shaft portion 291 and the adjustment base 217. The lock nut abuts against the outer circumference of the roller shaft portion 291.

[0150] Furthermore, as shown in Figures 17 and 19, at least one position regulating rib 2231 extending in the circumferential direction is provided on the outer surface of the supply conveyor belt 223. When there are multiple position regulating ribs 2231, the multiple position regulating ribs 2231 are arranged left and right along a direction perpendicular to the conveying direction of the input belt conveying mechanism 22. The position regulating ribs 2231 improve the accuracy of conveying the sorted items forward by regulating their position in the left and right direction as they are conveyed forward on the supply conveyor belt 223. The number of position regulating ribs 2231 on each supply conveyor belt 223 is determined according to the actual need. In this embodiment, there are two position regulating ribs 2231, one on the left and one on the right.

[0151] Furthermore, as shown in Figure 16, multiple transport assembly mounting areas 216 are provided in the input supply frame 21. The multiple transport assembly mounting areas 216 are arranged left and right in a direction perpendicular to the transport direction of the input belt transport mechanism 22. Multiple input belt transport mechanisms 22 are attached to each transport assembly mounting area 216. In the embodiment shown in Figure 16, there are two transport assembly mounting areas 216 on the input supply frame 21, one on the left and one on the right. Also, two input belt transport mechanisms 22 are attached to each transport assembly mounting area 216. By providing this configuration, the supply efficiency of the sorted items can be improved, and ultimately, the sorting efficiency of the sorting system can be improved.

[0152] Furthermore, as shown in Figure 20, in the conveying direction in which the input belt conveying mechanism 22 conveys the sorted items forward, the multiple input belt conveying mechanisms 22 are distributed in a stepped manner from rear to front and from high to low. That is, the input belt conveying mechanisms 22 distributed on the rear side are higher than the input belt conveying mechanisms 22 distributed on the front side. By using a structure in which the heights of two adjacent input belt conveying mechanisms 22 are offset in this way, the gap between the two adjacent input belt conveying mechanisms 22 can be reduced more effectively. As a result, the roughly triangular area 218 becomes even smaller, and the fall prevention is achieved more effectively. Moreover, by using multiple input belt conveying mechanisms 22 on the front and rear sides, it is possible to avoid the formation of a groove in the central part of the supply conveying belt 223. As a result, the problem of light sorted items bouncing up on the supply conveying belt 223 is avoided, and the reliability of the supply is firmly guaranteed.

[0153] Furthermore, the sorting cart 30 used in multiple embodiments of the above-described central supply sorting system has multiple preferred embodiments.

[0154] (Example 1 of sorting cart 30) As shown in Figure 21, the sorting cart 30 includes a cart frame 31 and a transfer belt conveying mechanism attached to the cart frame 31. The conveying direction of the transfer belt conveying mechanism is forward and backward. That is, the conveying direction of the transfer belt conveying mechanism is perpendicular to the extension direction of the fixed frame 10 and is the same as the width direction of the fixed frame 10. In Embodiment 1 of the central supply sorting system with a single cart structure, a two-car cart structure, and a four-car cart structure, the cart frame 31 is attached to the parallel movement frame 63 so as to be vertically movable and is fixedly connected to the second timing belt 673. In Embodiments 2 and 3 of the central supply sorting system, the cart frame 31 of the lateral movement cart is attached to the fixed frame 10 so as to be horizontally movable, and the cart frame 31 of the lifting cart is attached to the fixed frame 10 so as to be vertically movable. The sorting cart 30 receives the items to be sorted from the input supply device 20 as follows: That is, the sorting cart 30 moves to below the front end of the input supply device 20. Next, as the multiple input belt conveying mechanisms 22 transport the items to be sorted forward, the items fall from the front end of the input belt conveying mechanisms 22. They are then dropped onto the sorting cart 30 below, completing the receiving of the items to be sorted.

[0155] As shown in Figures 21 and 22, the transport belt conveying mechanism includes a transport drive source, a pair of sorting rollers 32 rotatably mounted on the front and rear ends of a trolley frame 31, and a sorting transport belt 33 connected to the two sorting rollers 32. The sorting rollers 32 are rotationally driven by a transport drive source (e.g., a motor). Alternatively, electric rollers are used for the sorting rollers 32. This enables forward and reverse motion of the sorting transport belt 33, so that the items to be sorted on the sorting transport belt 33 are transported forward to the drop slide tank 41 on the front side of the fixed frame 10, or the items to be sorted on the sorting transport belt 33 are transported backward to the drop slide tank 41 on the rear side of the fixed frame 10.

[0156] Preferably, as shown in Figures 21 and 22, the sorting cart 30 further includes a pair of lateral position regulating stoppers 34. The pair of lateral position regulating stoppers 34 are fixed to the cart frame 31. The pair of lateral position regulating stoppers 34 are distributed on both the left and right sides of the sorting conveyor belt 33 in a direction perpendicular to the conveying direction of the sorting conveyor belt 33. The lateral position regulating stoppers 34 have a shielding plate structure. The sorting conveyor belt 33 is also provided with at least two blocking bars 35. Each blocking bar 35 extends to the left and right. Multiple blocking bars 35 are provided at intervals in the rotational direction (i.e., conveying direction) of the sorting conveyor belt 33. The structure of the lateral position regulating stoppers 34 and blocking bars 35 ensures that sorted items do not unexpectedly fall from the sorting conveyor belt 33. The specific cross-sectional shape of the blocking bars 35 is not limited and may be linear, plate-shaped, block-shaped, rod-shaped, or irregularly shaped, etc. By providing the barrier bar 35, the following two functions are achieved.

[0157] 1. The surface friction of the sorting conveyor belt 33 increases, making it more difficult for the sorted items to slide.

[0158] 2. When the objects to be sorted have special shapes such as spheres or hemispheres, the barrier bar 35 provides braking and positional control to the objects. This makes it difficult for objects with special shapes to move uncontrollably on the sorting conveyor belt 33, thus ensuring accurate transport.

[0159] Furthermore, the sorting cart 30 has a detection assembly used for resetting the sorting conveyor belt 33. The detection assembly has the following two preferred structures.

[0160] 1. The detection assembly consists of a metal chip and a proximity switch. The metal chip is fixed to the left or right side of one of the multiple barrier bars 35. The proximity switch is fixed to the trolley frame 31 and is distributed on the same side as the barrier bars 35. The proximity switch is capable of sensing the metal chip. In the initial state of the sorting trolley 30, the proximity switch is capable of detecting the metal chip. This triggers the proximity switch. When the sorting trolley 30 receives the items to be sorted and moves to the corresponding drop slide tank 41, the proximity switch is in a triggered state. Subsequently, the transport drive source operates and rotates the sorting transport belt 33, thereby lowering the items to be sorted. During this process, the metal chip moves away from the proximity switch and then gradually approaches the proximity switch again. This indicates that the items to be sorted have been lowered when the state of the proximity switch switches from triggered to untriggered and then back to triggered. Subsequently, the transport drive source reverses direction to rotate the sorting transport belt 33 in the reverse direction. Then, the metal chip moves away from the proximity switch again, and then gradually approaches the proximity switch. As a result, the state of the proximity switch switches from triggered to untriggered again, and then switches back to triggered. At this time, the transport drive source stops operating, and the sorting transport belt 33 is reset.

[0161] 2. The detection assembly consists of a photoelectric sensor and a light reflector. Both the photoelectric sensor and the light reflector are fixed to the trolley frame 31 and are distributed so as to face each other in the vertical direction. One of the photoelectric sensor and the light reflector is distributed between the upper and lower ends of the sorting conveyor belt 33, and the other is distributed on the lower side of the sorting conveyor belt 33. As a result, the sorting conveyor belt 33 passes between the photoelectric sensor and the light reflector. The sorting conveyor belt 33 also has light-transmitting holes. Due to the rotational movement of the sorting conveyor belt 33, the light-transmitting holes can move to a position that faces the light reflector. In the initial state of the sorting trolley 30, the light-transmitting holes face the light reflector, and the light rays are not blocked. As a result, the photoelectric sensor is triggered. When the sorting trolley 30 receives the items to be sorted and moves to the corresponding drop slide tank 41, the proximity switch is in a triggered state. Subsequently, the transport drive source operates, rotating the sorting transport belt 33, and the items to be sorted are lowered. During this process, the light-transmitting holes move away from the light reflector and then approach it again. This indicates that the items have been lowered when the state of the photoelectric sensor switches from triggered to untriggered and then back to triggered. The transport drive source then reverses its rotation, causing the sorting transport belt 33 to rotate in the reverse direction. The light-transmitting holes then move away from the light reflector again and then approach it again. This causes the state of the photoelectric sensor to switch from triggered to untriggered and then back to triggered. At this point, the transport drive source stops operating, and the sorting transport belt 33 is reset.

[0162] (Example 2 of sorting cart 30) As shown in Figure 23, in Embodiment 2 of the sorting cart 30, a pair of main position restricting stoppers 36 are added to the above-described Embodiment 1 of the sorting cart 30. The pair of main position restricting stoppers 36 are distributed at both the front and rear ends of the sorting conveyor belt 33 in the conveying direction of the sorting conveyor belt 33. The pair of main position restricting stoppers 36 are attached to the cart frame 31. In addition, a pair of lateral position restricting stoppers 34 are fixed to the cart frame 31 and are higher than the sorting conveyor belt 33. At both the front and rear ends of the sorting conveyor belt 33, an opening is formed between the pair of lateral position restricting stoppers 34 and the sorting conveyor belt 33. Of these, the front opening is defined as the first opening 331 and the rear opening as the second opening 332. Both the first opening 331 and the second opening 332 allow the passage of items to be sorted. The pair of main position restricting stoppers 36 are provided at the first opening 331 and the second opening 332, respectively. The front main position regulating stopper 36 can close or open the first opening 331 by moving toward or toward the first opening 331. The rear main position regulating stopper 36 can close or open the second opening 332 by moving toward or toward the second opening 332. In this way, during the process of the sorting cart 30 transporting the items to be sorted, the pair of main position regulating stoppers 36 close the first opening 331 and the second opening 332. As a result, the forward and backward movement of the items to be sorted is blocked by the pair of main position regulating stoppers 36, preventing the items from falling downward from the first opening 331 or the second opening 332, thus providing a fall prevention effect.

[0163] Preferably, the main position regulating stopper 36 has multiple motion modes, such as vertical lifting, vertical rotation, and forward / backward rotation. The main position regulating stopper 36 may be a single shielding plate or two shielding plates, left and right. In the embodiment shown in Figure 23, each main position regulating stopper 36 includes two position regulating gates 361, left and right. The sorting cart 30 further includes a stopper drive source 37 connected to each position regulating gate 361 to transmit power. The stopper drive source 37 is fixed to the cart frame 31. The stopper drive source 37 may be a gas cylinder, motor, electromagnet, etc., and will lift the connected position regulating gates 361 up and down, rotate them up and down, or rotate them forward and backward. When the stopper drive source 37 moves the position regulating gate 361 until the first opening 331 or the second opening 332 is opened, the items to be sorted can enter the sorting cart 30 or be unloaded from the sorting cart 30. Also, when the stopper drive source 37 moves the position regulating gate 361 until the first opening 331 or the second opening 332 is closed, the items to be sorted on the sorting cart 30 are prevented from falling, thus providing a fall prevention function. In the embodiment shown in Figure 23, the movement method of the position regulating gate 361 is rotational.

[0164] In addition, in Embodiment 2 of the sorting cart 30, the sorting conveyor belt 33 may be provided with the blocking bar 35 as in Embodiment 1 of the sorting cart 30. Alternatively, the sorting conveyor belt 33 may not be provided with the blocking bar 35, as shown in Figure 23. If the blocking bar 35 is provided on the sorting conveyor belt 33, the blocking bar 35 may be considered as a main position regulating stopper 36 fixed to the sorting conveyor belt 33.

[0165] (Example 3 of sorting cart 30) Embodiment 3 of the sorting cart 30 differs from Embodiment 2 of the sorting cart 30 in the specific structure of the main position restricting stopper 36. In Embodiment 3 of the sorting cart 30 shown in Figure 24, as shown in Figures 24, 27, and 28, the sorting cart 30 further includes a stopper lifting drive source and a stopper lifting transmission unit attached to the cart frame 31. Each of the pair of main position restricting stoppers 36 has a single shielding plate structure. The pair of main position restricting stoppers 36 are attached to the cart frame 31 so as to be able to move up and down. The stopper lifting drive source is connected to the pair of main position restricting stoppers 36 via the stopper lifting transmission unit to transmit power to the pair of main position restricting stoppers 36, causing the pair of main position restricting stoppers 36 to move up and down synchronously. When the sorting cart 30 moves to the input supply device 20 to receive the items to be sorted, and when the sorting cart 30 moves to the drop slide tank 41 to unload the items to be sorted, the stopper lifting drive source moves the two front and rear main position restricting stoppers 36 upward simultaneously and synchronously via the stopper lifting transmission unit, thereby separating the main position restricting stoppers 36 from the entrance and exit. As a result, the main position restricting stoppers 36 no longer perform a blocking action, so that the items to be sorted are either loaded onto the sorting conveyor belt 33 through the entrance and exit, or unloaded from the sorting conveyor belt 33 through the entrance and exit. On the other hand, during the movement of the sorting cart 30 on which the items to be sorted are placed, the stopper lifting drive source moves the two front and rear main position restricting stoppers 36 downward simultaneously and synchronously via the stopper lifting transmission unit until they hit the outside of the entrance and exit. As a result, the main position regulating stopper 36 acts as a barrier, preventing objects on the sorting conveyor belt 33 from falling out of the entrance, thus providing a good fall prevention function. In this invention, the objective of cost reduction is achieved by simultaneously and synchronously raising and lowering two main position regulating stoppers 36 using one stopper lifting drive source. Furthermore, in this invention, the movement method of the main position regulating stopper 36 is set to lifting and lowering, that is, vertical movement. In this case, compared to a movement method that rotates vertically, the requirement for the space above the main position regulating stopper 36 is lower, so the sorting cart 30 can be attached to the central supply sorting system more easily.

[0166] Furthermore, as shown in Figures 24, 27, and 28, the conveying drive source 313 that rotates the sorting conveying belt 33 in the sorting cart 30 is fixed to the outer side of the left lateral position regulating stopper 34. The conveying drive source 313 is connected to a pair of sorting rollers 32 via a conveying transmission assembly. The conveying transmission assembly may be a timing belt pulley assembly.

[0167] Furthermore, as shown in Figures 24 and 27, the stopper lifting drive source is a motor. The stopper lifting transmission unit includes a first transmission assembly 38 connected to the motor shaft of the stopper lifting drive source, and a second transmission assembly 39 connected to each main position regulating stopper 36. Both second transmission assemblies 39 are connected to the first transmission assembly 38. The first transmission assembly 38 may be a rack and pinion assembly, a sprocket chain assembly, or a timing belt pulley assembly. The second transmission assembly 39 may be a screw nut assembly, a ball screw assembly, or a worm gear assembly.

[0168] A preferred structure of the first transmission assembly 38 is as follows: As shown in Figures 24, 25, and 27, the first transmission assembly 38 is distributed on the outer side of the right-side lateral position regulating stopper 34. The second transmission assembly 39 includes a transmission rotation shaft 391 that is rotatably supported on the trolley frame 31. The first transmission assembly 38 also includes a fourth drive pulley 381 fixed to the motor shaft of the stopper lifting drive source, a fourth driven pulley 382 fixed to the transmission rotation shaft 391 of each second transmission assembly 39, and a third timing belt 383. The third timing belt 383 is connected to the outer circumference of the fourth drive pulley 381 and the two fourth driven pulleys 382. In this way, when the stopper lifting drive source rotates the fourth drive pulley 381, the transmission rotation shafts 391 in the two front and rear second transmission assemblies 39 are rotated simultaneously and synchronously through the two front and rear fourth driven pulleys 382 and the third timing belt 383. As a result, the two front and rear second transmission assemblies 39 operate synchronously, enabling synchronous upward or downward movement of the two front and rear main position restricting stoppers 36.

[0169] Furthermore, as shown in Figures 24, 25, and 27, the first transmission assembly 38 further includes a motor mounting frame 384, a tension adjustment groove 385 formed in the motor mounting frame 384, and a tension adjustment bolt inserted into the tension adjustment groove 385. The stopper lifting drive source is fixed to the motor mounting frame 384. The motor mounting frame 384 is fastened to the trolley frame 31 by the tension adjustment bolt. The tension adjustment groove 385 is an elliptical groove that extends horizontally to the left and right. This makes it possible to adjust the left and right position of the motor mounting frame 384 after loosening the tension adjustment bolt. That is, it is possible to adjust the tension of the third timing belt 383 by adjusting the left and right positions of the stopper lifting drive source and the fourth drive pulley 381. After the adjustment is complete, the tension adjustment bolt can be tightened. Preferably, the first transmission assembly 38 further includes two idler gears 386 that are rotatably mounted to the trolley frame 31. The two idler gears 386 are distributed on both the front and rear sides of the fourth drive pulley 381 and both abut the outside of the third timing belt 383. By providing the idler gears 386, the two left and right portions of the third timing belt 383, which extends in the front and rear directions, can be made parallel to each other.

[0170] Preferably, as shown in Figures 24, 26, and 28, each second transmission assembly 39 includes two lead screws 392 distributed at both the left and right ends of the main position regulating stopper 36, a lead nut 393 connected to the lead screws 392, a fifth driven pulley 394 fixed to the lower end of each lead screw 392, and a fourth timing belt 395. Both lead screws 392 are mounted vertically and are rotatably attached to the trolley frame 31 via a bearing housing. The right lead screw 392 closer to the first transmission assembly 38 constitutes the transmission rotation shaft 391. Thus, the right lead screw 392 is connected to the first transmission assembly 38. That is, the fourth driven pulley 382 is fixed to the upper end of each right lead screw 392. The fourth timing belt 395 is connected to the outer circumference of the two fifth driven pulleys 394 on the left and right sides of the second transmission assembly 39. Furthermore, the feed nut 393 is connected to the main position restricting stopper 36. In this way, the stopper lifting drive source rotates the right-side feed screw 392 in the two front and rear second transmission assemblies 39 simultaneously and synchronously via the first transmission assembly 38. The right-side feed screw 392 rotates the left-side feed screw 392 simultaneously and synchronously via the fifth driven pulley 394 and the fourth timing belt 395. This causes the two front and rear main position restricting stoppers 36 to move synchronously upward or downward via the feed nut 393.

[0171] Furthermore, as shown in Figure 26, a fitting gap 396 is provided between the feed nut 393 and the main position regulating stopper 36. A connecting bolt 397 extending in the front-rear direction is fixed to the feed nut 393. The connecting bolt 397 is attached to the main position regulating stopper 36 via a thrust bearing. By providing the thrust bearing and the fitting gap 396, the main position regulating stopper 36 can have a certain amount of front-rear movement relative to the feed nut 393. As a result, misalignment is eliminated, and provided that synchronization is guaranteed, the occurrence of the stacking phenomenon is avoided.

[0172] Furthermore, preferred embodiments of the dropping mechanism 40 used in multiple embodiments of the above-described central supply sorting system will be explained below.

[0173] As shown in Figures 1 and 29, the dropping mechanism 40 includes a slide tank bottom plate 42 attached to a fixed frame 10 and a plurality of slide tank guard plates 424 attached to the slide tank bottom plate 42. A plurality of dropping slide tanks 41 are formed between the slide tank bottom plate 42 and the plurality of slide tank guard plates 424. The slide tank bottom plate 42 is rectangular in shape. The slide tank bottom plate 42 includes a first side 4211 and a second side 4212 that are arranged to face each other front and rear. The first side 4211 is close to the sorting cart 30. That is, the first side 4211 is the inner side of the slide tank bottom plate 42. The second side 4212 is away from the sorting cart 30. That is, the second side 4212 is the outer side of the slide tank bottom plate 42. Furthermore, the height of the first side 4211 is higher than the height of the second side 4212. Furthermore, since the bottom plate 42 of the slide tank is provided to be inclined downward and outward, the dropping slide tank 41 is also provided to be inclined downward and outward. As a result, the sorted items dropped from the first side 4211 onto the bottom plate 42 of the slide tank slide down to the second side 4212 due to gravity, and then are dropped into the receiving device 50. Preferably, the bottom plate 42 of the slide tank further includes a third side and a fourth side provided opposite each other on the left and right. One connecting plate 44 is provided on each of the third side and the fourth side. The bottom plate 42 of the slide tank is attached to the fixed frame 10 via the connecting plates 44.

[0174] During the sorting operation, the sorting cart 30 first moves to the input and supply device 20 and receives the items to be sorted supplied from the input and supply device 20. Then, the sorting cart 30 holds the items to be sorted and moves to a predetermined position on the bottom plate 42 of the slide tank. The sorting cart 30 then lowers the items to be sorted, and the items pass through the bottom plate 42 of the slide tank and are dropped into the receiving device 50, completing the dropping process. To prevent the items to be sorted from falling into the gap between the sorting cart 30 and the bottom plate 42 of the slide tank, and to ensure the smooth completion of the dropping process, a flexible stopper 43 is provided on the first side edge 4211 of the bottom plate 42 of the slide tank, as shown in Figure 29. The flexible stopper 43 contributes to reducing the gap between the sorting cart 30 and the bottom plate 42 of the slide tank, thereby preventing items from falling. It also has the characteristic of being able to automatically return to its elastic state during the collision process with the sorting cart 30 and is resistant to damage. Specifically, the flexible stopper 43 is made of a flexible material with excellent resilience, such as silicone or rubber. Also, lighter items to be sorted on the sorting cart 30 are more likely to fall than heavier items to be sorted. When lighter items to be sorted fall from the sorting cart 30, they fall onto the flexible stopper 43. Since the flexible stopper 43 itself has a certain load-carrying capacity, the load-carrying performance of the flexible stopper 43 can also guarantee that the items to be sorted enter the bottom plate 42 of the slide tank, and thus ensure that the dropping is completed smoothly.

[0175] Furthermore, when the sorting cart 30 attempts to lower the items to be sorted, which are placed on it, onto the bottom plate 42 of the sliding tank, the height of the sorting cart 30 is higher than the height of the first side 4211, so there is a height difference between the sorting cart 30 and the bottom plate 42 of the sliding tank. This height difference makes it possible to cause the items to be sorted, which are far from the sorting cart 30, to perform parabolic motion, thereby greatly improving the possibility of dropping the items onto the bottom plate 42 of the sliding tank.

[0176] Furthermore, there are no restrictions on the form of the flexible stopper 43, and it may include several flexible pads provided along the first side 4211. Also, as shown in Figures 29 to 31, the flexible stopper 43 may include multiple flexible strips 431. The multiple flexible strips 431 are provided on the first side 4211 at intervals from left to right. Compared to a single flexible pad, the multiple flexible strips 431 can reduce the resistance force that the sorting cart 30 experiences during movement, while also reducing wear on the flexible strips 431 themselves, thus extending the overall service life compared to a flexible pad.

[0177] In the embodiment using the multiple flexible strips 431 described above, as shown in Figures 30 to 35, the bottom plate 42 of the slide tank includes a main plate body 421 and a bent portion 422 connected to form an L shape. The main plate body 421 includes the first side 4211 and the second side 4212 described above. Their extension directions are parallel to the length direction of the main plate body 421. The first side 4211 is connected to the bent portion 422. Furthermore, at the connection point between the main plate body 421 and the bent portion 422, a plurality of through holes 423 are provided at intervals in the extension direction of the first side 4211. The dropping mechanism 40 also includes a pressing plate 46 provided below the main plate body 421. The pressing plate 46 includes a first plate body 461 and a second plate body 462 connected to form an L shape. The first plate body 461 has multiple sets of through holes spaced apart along its length. The length of the first plate body 461 is parallel to the extension direction of the first side edge 4211. Each set of through holes includes a first through hole 4611 and a second through hole 4612 spaced apart along the width of the first plate body 461. As shown in Figures 29 to 31 and 36, one end of the flexible strip 431 is inserted sequentially through the through hole 423, the second through hole 4612, and the first through hole 4611 to form a U-shaped section 432. The second plate body 462 is detachably connected to the bent section 422. This configuration prevents the flexible strip 431 from falling off the bottom plate 42 of the slide tank during use, making the mounting structure more robust and stable.

[0178] Furthermore, as shown in Figures 31, 32, 34, and 35, a connecting hole 4621 is provided in the second plate body 462, and a fastening slot 4221 is provided in the bent portion 422. The fastening slot 4221 extends along the width direction of the bent portion 422. The inner diameter of the connecting hole 4621 is smaller than the length of the fastening slot 4221. The connection between the connecting hole 4621 and the fastening slot 4221 is made by a fastening member. Specifically, the fastening member is a bolt. By adjusting the position of the fastening member in the fastening slot 4221, the distance between the first plate body 461 and the main plate body 421 can be changed, which is convenient for fixing flexible strips 431 of different dimensions to the slide tank bottom plate 42. Also, as shown in Figure 30, a number of reinforcing ribs 45 are further provided on the bottom of the main plate body 421. Specifically, the reinforcing rib 45 extends along the extension direction of the first side 4211. This configuration strengthens the structural strength of the main plate body 421 and contributes to supporting sorted objects of different weights.

[0179] In summary, this invention reduces the time required for each sorting by shortening the distance the sorting cart 30 travels along the length of the fixed frame 10 during a single sorting cycle, through a central supply structure. This improves sorting efficiency.

[0180] The above embodiments are merely illustrative in illustrating the principles and effects of the present invention and do not limit it. Those familiar with the art can supplement or modify the above embodiments, provided they do not depart from the spirit and scope of the present invention. Therefore, any equivalent supplements or modifications completed by those skilled in the art, provided they do not depart from the spirit and technical concept disclosed herein, should still be included within the scope of the claims of the present invention.

Claims

1. A central supply sorting system comprising a fixed frame (10) and a feeding device (20) that are permanently attached, at least one sorting cart (30) that is movably attached to the fixed frame (10), a plurality of drop slide tanks (41) attached to the fixed frame (10), and a receiving device (50) positioned on the outer side of the fixed frame (10), wherein the sorting cart (30) is capable of reciprocating motion between the feeding device (20) and the drop slide tanks (41), and the receiving device (50) has a plurality of receiving frames (51) that correspond one-to-one with the drop slide tanks (41), The fixed frame (10) is provided with an input / supply station (101), and the input / supply device (20) is provided on the input / supply station (101) of the fixed frame (10). On either of the different sides of the input supply device (20), the dropping slide tank (41) and the receiving device (50) are provided on the fixed frame (10). The fixed frame (10) has a straight line shape, the input direction of the input / supply device (20) is perpendicular to the extension direction of the fixed frame (10), and in the extension direction of the fixed frame (10), both the input / supply station (101) and the input / supply device (20) are located at the center of the fixed frame (10). The central supply sorting system is characterized in that sorting subsystems are provided on both sides of the input supply station (101) and the input supply device (20) in a direction perpendicular to the input direction of the input supply device (20), and each sorting subsystem includes a portion of the fixed frame (10), the drop slide tank (41), and the receiving device (50).

2. The central supply sorting system according to claim 1, characterized in that the central supply sorting system has a single cart structure, one sorting cart (30) is provided, and the one sorting cart (30) is movable within the areas on both sides of the input supply station (101) in the extension direction of the fixed frame (10).

3. The central supply sorting system according to claim 1, characterized in that the central supply sorting system has a two-car trolley structure, and two sorting trolleys (30) are arranged, and both sorting trolleys (30) are movable within the areas on both sides of the input supply station (101) in the extension direction of the fixed frame (10).

4. The central supply sorting system according to claim 1, characterized in that the central supply sorting system has a four-car trolley structure, and four sorting trolleys (30) are arranged, two of which are located in an area on one side of the input supply station (101) in the extension direction of the fixed frame (10) and are movable within that area, and the remaining two sorting trolleys (30) are located in an area on the other side of the input supply station (101) in the extension direction of the fixed frame (10) and are movable within that area.

5. Each sorting cart (30) is movably attached to the fixed frame (10) by a sorting transmission mechanism (60). Each sorting transmission mechanism (60) includes a parallel movement guide rail (61) fixed to the fixed frame (10), a parallel movement drive source (62), a parallel movement frame (63) assembled to slide on the parallel movement guide rail (61), a vertical movement drive source (64), and a vertical movement guide rail (65) fixed to the parallel movement frame (63), wherein the parallel movement guide rail (61) extends flat in the direction of extension of the fixed frame (10) and both ends extend to both ends of the fixed frame (10), and the vertical movement guide rail (65) is the The central supply sorting system according to any one of claims 2 to 4, characterized in that the fixed frame (10) extends vertically in the height direction, the parallel movement drive source (62) is connected to transmit power to the parallel movement frame (63), the sorting cart (30) is assembled to slide on the vertical movement guide rail (65), the vertical movement drive source (64) is connected to transmit power to the sorting cart (30), and the input supply station (101) is distributed on a movement path in which the parallel movement frame (63) slides along the parallel movement guide rail (61).

6. The translation drive source (62) is a translation drive motor fixed to the fixed frame (10), and the vertical movement drive source (64) is a vertical movement drive motor fixed to the translation frame (63). The translation drive motor is connected to the translation frame (63) via a first timing belt drive assembly (66), the first timing belt drive assembly (66) includes a first drive pulley (661) and a first driven pulley (662) rotatably supported on the fixed frame (10), and a first timing belt (663) connected to the outer circumference of the first drive pulley (661) and the first driven pulley (662), the translation drive motor is connected to the first drive pulley (661), and the first timing belt (663) is fixedly connected to the translation frame (63). The vertical movement drive motor is connected to the sorting cart (30) via a second timing belt transmission assembly (67), the second timing belt transmission assembly (67) includes a second drive pulley (671) and a second driven pulley (672) rotatably supported on the parallel movement frame (63), and a second timing belt (673) connected to the outer circumference of the second drive pulley (671) and the second driven pulley (672), the vertical movement drive motor is connected to the second drive pulley (671), and the second timing belt (673) is fixedly connected to the sorting cart (30). The central supply sorting system according to claim 5, characterized in that both the extension path of the first timing belt (663) and the extension path of the second timing belt (673) cover the input supply station (101).

7. In the case of the central supply sorting system having a four-car bogie structure, four parallel movement frames (63) are arranged, two of which are distributed on both sides of the input supply station (101) in the extending direction of the fixed frame (10) and on one side of the fixed frame (10) in the width direction of the fixed frame (10), and share the same parallel movement guide rail (61), and the remaining two are distributed on both sides of the input supply station (101) in the extending direction of the fixed frame (10) and on the other side of the fixed frame (10) in the width direction of the fixed frame (10), and share the same parallel movement guide rail (61), and the two first timing belt transmission assemblies (66) connected to the two parallel movement frames (63) that share the same parallel movement guide rail (61) are offset in the width direction of the fixed frame (10), as described in claim 6.

8. In each sorting subsystem, dropping mechanisms (40) are provided on both sides of the fixed frame (10) in a direction perpendicular to its extension direction, and a trolley movement area (102) is formed between the two dropping mechanisms (40) that allows the sorting trolley (30) to move. Each of the aforementioned dropping mechanisms (40) includes a plurality of slide tank bottom plates (42) arranged vertically and fixed to the fixed frame (10), and a plurality of slide tank guard plates (424) arranged in the extending direction of the fixed frame (10) are fixed to each of the slide tank bottom plates (42), and the dropping slide tank (41) is formed between two adjacent slide tank guard plates (424) and the slide tank bottom plate (42). The central supply sorting system according to claim 1, characterized in that a flexible stopper (43) extending toward the trolley movement area (102) is fixed to the inner edge of each slide tank bottom plate (42) that is close to the trolley movement area (102).

9. The central supply sorting system according to claim 8, characterized in that the flexible stopper (43) includes a plurality of flexible strips (431) aligned in the extension direction of the fixed frame (10).

10. The central supply sorting system according to claim 1, characterized in that the input supply device (20) includes a fixedly provided input supply frame (21) and a plurality of input belt conveying mechanisms (22) attached to the input supply frame (21), each input belt conveying mechanism (22) includes a pair of supply rollers (222) rotatably attached to the input supply frame (21) and a supply conveying belt (223) connected to the pair of supply rollers (222), the plurality of input belt conveying mechanisms (22) are sequentially connected in the conveying direction, and the supply drive sources of the plurality of input belt conveying mechanisms (22) are independent of each other.

11. The central supply sorting system according to claim 10, characterized in that, in the conveying direction of the input belt conveying mechanism (22), the plurality of input belt conveying mechanisms (22) are distributed in a stepped manner from high to low.

12. The central supply sorting system according to claim 10, wherein the input supply device (20) further includes a grating sensor (23) provided on the outer side of each input belt conveying mechanism (22) and fixed to the input supply frame (21), and the input supply frame (21) is provided with a detection opening (213) that allows the grating sensor (23) to be exposed.

13. The central supply sorting system according to claim 10, characterized in that a substantially triangular region (218) is formed between two adjacent input belt conveying mechanisms (22), and the supply roller (222) is a small-diameter roller with a diameter of 40 mm or less.

14. The central supply sorting system according to claim 1, characterized in that the sorting cart (30) includes a cart frame (31) that is movably attached to the fixed frame (10) and a transfer belt conveying mechanism attached to the cart frame (31), the transfer belt conveying mechanism having a sorting conveying belt (33), and a plurality of barrier bars (35) arranged in the longitudinal direction of the sorting conveying belt (33) fixed to the outer surface of the sorting conveying belt (33).

15. The central supply sorting system according to claim 14, wherein the sorting cart (30) further includes a metal tip fixed to the edge side of one of the barrier bars (35) and a proximity switch fixed to the cart frame (31), the proximity switch being capable of sensing the metal tip.

16. The central supply sorting system according to claim 14, wherein the sorting cart (30) further includes a photoelectric sensor and a light reflector fixed to the cart frame (31), the photoelectric sensor and the light reflector are distributed so as to face each other in the vertical direction, and the sorting conveyor belt (33) passes between the photoelectric sensor and the light reflector and has light-transmitting holes, the light-transmitting holes are movable to a position that faces the light reflector.

17. The central supply sorting system according to claim 14, wherein the sorting trolley (30) further includes a pair of lateral position regulating stoppers (34) attached to the trolley frame (31), and a pair of main position regulating stoppers (36) attached to the trolley frame (31), wherein a first opening (331) and a second opening (332) are formed between the sorting conveying belt (33) and the pair of lateral position regulating stoppers (34), the first opening (331) and the second opening (332) are distributed at both ends of the sorting conveying belt (33) in the conveying direction of the sorting conveying belt (33), and the main position regulating stoppers (36) are movably attached to the trolley frame (31) to close or open the first opening (331) and the second opening (332).

18. The central supply sorting system according to claim 17, wherein each of the main position restricting stoppers (36) includes two position restricting gates (361) that are rotatably attached to the trolley frame (31), and a stopper drive source (37) is provided in the portion of the sorting trolley (30) where each of the position restricting gates (361) is located, and the stopper drive source (37) is fixed to the trolley frame (31).

19. The central supply sorting system according to claim 17, wherein the sorting cart (30) further includes a stopper lifting drive source and a stopper lifting transmission unit attached to the cart frame (31), a pair of main position restricting stoppers (36) are mounted on the cart frame (31) so as to be able to move up and down, the stopper lifting drive source is connected to the pair of main position restricting stoppers (36) via the stopper lifting transmission unit to transmit power, and the pair of main position restricting stoppers (36) are raised and lowered synchronously.

20. A central supply sorting method, Using the central supply sorting system described in any one of claims 1 to 4 or 10 to 19, Step S1 involves sequentially placing multiple items to be sorted onto the input / supply device (20), and the input / supply device (20) transporting the items to be sorted toward the fixed frame (10). Step S2 involves the sorting cart (30) moving to the input / supply device (20), Step S3 is when the sorting cart (30) receives the sorting items discharged from the input supply device (20), Step S4 involves the sorting cart (30) moving to a drop slide tank (41) corresponding to the items to be sorted on the sorting cart (30), Step S5 is performed in which, when the sorting cart (30) unloads the items to be sorted, the items to be sorted are dropped through the dropping slide tank (41) into the receiving frame (51) corresponding to the dropping slide tank (41), Step S6, in which the sorting cart (30) moves and returns to the input supply device (20), Step S7 is a repeat of steps S3 to S6, Includes, In step S4, which is performed multiple times, the sorting cart (30) is capable of moving toward the drop slide tanks (41) distributed on different sides of the input supply device (20), characterized in that the central supply sorting method.

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