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 merchandise and parcels, and in particular to a centrally fed sorting system and a method of centrally fed sorting performed using the centrally fed sorting system. [Background technology]

[0002] The automated parcel sorting system can automatically transport each parcel to its corresponding section, allowing for continuous sorting of a large number of parcels. This automated sorting system has advantages such as high sorting efficiency and a low sorting error rate, and is therefore widely used in logistics distribution centers.

[0003] Typically, an automatic parcel sorting system includes a fixedly mounted stationary frame, a fixedly mounted input / output mechanism, a movable frame mounted on the stationary frame so as to be movable in the length direction of the stationary frame, a sorting cart mounted on the movable frame so as to be movable up and down in the height direction of the stationary frame, and a receiving mechanism disposed on the outer edge of the stationary frame in the width direction of the stationary frame. The stationary frame is provided with multiple compartments (i.e., drop slide tanks), and multiple receiving frames are disposed in the receiving mechanism. The multiple receiving frames correspond one-to-one to the multiple compartments. During operation of the automatic parcel sorting system, a sorter simply places multiple parcels on the input / output mechanism. The sorting cart moves to the input / output mechanism to receive the parcels. The sorting cart then moves to the corresponding compartment based on the parcel information. When the sorting cart removes the parcels, the parcels slide down from the compartment into the corresponding receiving frame. Automatic sorting of multiple parcels is achieved by the reciprocating motion of the sorting cart between the input / output mechanism and the compartments.

[0004] Conventional automated parcel sorting systems all employ a terminal supply structure. That is, an input / output mechanism is provided at the longitudinal end of a fixed frame. Examples include the multi-axis, two-cart automatic sorting device disclosed in Patent Document 1, the XYZ three-axis, three-dimensional automatic sorting device disclosed in Patent Document 2, and the high-efficiency, two-cart automatic sorting device disclosed in Patent Document 3. In conventional terminal supply structures, after the sorting cart transports parcels to a section, the movable frame must move the sorting cart to the end of the fixed frame in the longitudinal direction of the fixed frame. In this case, the moving frame and the sorting cart must travel a long distance in the longitudinal direction of the fixed frame, which is inconvenient for further improving 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 Summary of the Invention [Problem to be solved by the invention]

[0006] In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a central feed sorting system and method with higher sorting efficiency. [Means for solving the problem]

[0007] To achieve the above object, the present invention provides a central feed sorting system including a fixedly mounted stationary frame and an input / output device, at least one sorting cart movably mounted to the stationary frame, a plurality of drop slide tanks mounted to the stationary frame, and a receiving device disposed on the outer periphery of the stationary frame. The sorting cart is reciprocable between the input / output device and the drop slide tank. The receiving device has a plurality of receiving frames corresponding one-to-one to the drop slide tanks. The stationary frame is provided with an input / output station. The input / output device is provided in the input / output station of the stationary frame. The drop slide tank and the receiving device are provided on the stationary frame on either side of the input / output device. In this application, the input / output station and the input / output device are provided at non-terminal positions in the extension direction of the stationary frame. This results in a central feed structure or a non-terminal feed structure in which the drop slide tank and the receiving device are provided on the stationary frame on either side of the input / output station and the input / output device. Compared with the conventional terminal supply structure in which the input / output station and the input / output device are provided at one end of the extension direction of the fixed frame, in the present application, the distance that the sorting cart moves in the extension direction of the fixed frame during one sorting run can be shortened, thereby shortening the time required for one sorting run and relatively increasing the number of drop slide tanks and receiving devices, thereby improving sorting efficiency.

[0008] In a preferred embodiment of the central-feed sorting system, the stationary frame is shaped like a straight line, and the input direction of the input feeder is perpendicular to the extension direction of the stationary frame. In the extension direction of the stationary frame, the input feed station and the input feeder are both located at the center of the stationary frame. In the central-feed sorting system, sorting subsystems are provided on both sides of the input feed station and the input feeder in a direction perpendicular to the input direction of the input feeder. Each sorting subsystem includes a portion of the stationary frame, the drop slide tank, and the receiving device.

[0009] As a preferred option for the central supply sorting system, the central supply sorting system has a single carriage structure, and one sorting carriage is arranged, and the single sorting carriage is movable within the areas on both sides of the input / output station in the extension direction of the fixed frame.

[0010] As a preferred option for the central supply sorting system, the central supply sorting system has a two-cart structure, and two sorting cars are arranged, and both of the two sorting cars are movable within the areas on both sides of the input / output station in the extension direction of the fixed frame.

[0011] As a preferred option for the central supply sorting system, the central supply sorting system has a four-carriage structure. Four sorting carts are arranged. Two of the sorting carts are arranged in an area located on one side of the input / output station in the extension direction of the fixed frame and are movable within the area. The remaining two sorting carts are arranged in an area located on the other side of the input / output station in the extension direction of the fixed frame and are movable within the area.

[0012] In a preferred option for the central supply sorting system, each of the sorting carts is movably attached to the fixed frame by a single sorting transmission mechanism. Each of the sorting transmission mechanisms includes a parallel movement guide rail fixed to the fixed frame, a parallel movement drive source, a parallel movement frame slidably coupled to the parallel movement guide rail, a vertical movement drive source, and a vertical movement guide rail fixed to the parallel movement frame. The parallel movement guide rail extends vertically in the extension direction of the fixed frame, with both ends extending to both ends of the fixed frame. The vertical movement guide rail extends vertically up and down in the height direction of the fixed frame. The parallel movement drive source is connected to the parallel movement frame for transmission. The sorting cart is slidably coupled to the vertical movement guide rail. The vertical movement drive source is connected to the sorting cart for transmission. The input / output stations are distributed on a movement path along which the parallel movement frame slides along the parallel movement guide rail.

[0013] In a preferred option for the central supply sorting system, the translation drive source is a translation drive motor fixed to the fixed frame, and the vertical movement drive source is a vertical movement drive motor fixed to the translation frame. The translation drive motor is connected to the translation frame via a first timing belt transmission assembly. The first timing belt transmission assembly includes a first driving pulley and a first driven pulley rotatably supported by the fixed frame, and a first timing belt connected to the outer peripheries of the first driving pulley and the first driven pulley. The translation drive motor is connected to the first driving pulley. The first timing belt is fixedly connected to the translation frame. The vertical movement drive motor is connected to the sorting cart via a second timing belt transmission assembly. The second timing belt transmission assembly includes a second driving pulley and a second driven pulley rotatably supported by the translation frame, and a second timing belt connected to the outer peripheries of the second driving pulley and the second driven pulley. The vertical movement drive motor is connected to the second driving pulley. The second timing belt is fixedly connected to the sorting cart, and the extending path of the first timing belt and the extending path of the second timing belt both cover the input / output station.

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

[0015] In a preferred option for a central feed sorting system, the stationary frame is provided with a corner on its extension path, and the input feed station and the input feed device are both provided at the corner of the stationary frame in the extension direction of the stationary frame.

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

[0017] In a preferred option for the central feed sorting system, the stationary frame is T-shaped. A sorting subsystem is provided on the side of the stationary frame facing the input feeder in the input direction of the input feeder. Also, a sorting subsystem is provided on the stationary frame on both sides of the input feeder in a direction perpendicular to the input direction. Each sorting subsystem includes a portion of the stationary frame, the drop slide bin, and the receiving device.

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

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

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

[0021] In a preferred option for the central feed sorting system, the input belt conveyors are distributed in a stepped manner from higher to lower in the conveying direction of the input belt conveyors.

[0022] In a preferred option for a central feed sorting system, the input feed device further includes a grating sensor provided on the outer periphery of each of the input belt transport mechanisms and fixed to the input feed frame, the input feed frame having a detection opening through which the grating sensor can be exposed.

[0023] In a preferred option for the central feed sorting system, a substantially triangular area is formed between two adjacent input belt conveying mechanisms, and the feed rollers are small diameter rollers with a diameter of 40 mm or less.

[0024] In a preferred option for the central supply sorting system, the sorting cart further includes a cart frame movably mounted on the fixed frame, and a transfer belt conveying mechanism mounted on the cart frame, the transfer belt conveying mechanism having a sorting conveying belt, and a plurality of blocking bars fixed to an outer surface of the sorting conveying belt aligned in the longitudinal direction of the sorting conveying belt.

[0025] As a preferred option for the central supply sorting system, the sorting cart further includes a metal tip fixed to the edge side of one of the blocking bars and a proximity switch fixed to the cart frame, the proximity switch being capable of detecting the metal tip.

[0026] In a preferred embodiment 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 disposed so as to face each other in the vertical direction. The sorting conveyor belt passes between the photoelectric sensor and the light reflector, and has a light transmission hole formed therein. The light transmission hole can be moved to a position facing the light reflector.

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

[0028] In a preferred option for a central supply sorting system, each of the main position control stops includes two position control gates pivotally attached to the cart frame. A stopper drive source is provided at a portion of the sorting cart where each of the position control gates is located, and is connected to each of the position control gates so as to transmit power thereto. The stopper drive source is fixed to the cart frame.

[0029] In a preferred option for the central supply sorting system, the sorting cart further includes a stopper lifting drive source and a stopper lifting transmission unit attached to the cart frame. The pair of main position control stoppers are attached to the cart frame so as to be able to lift and lower. The stopper lifting drive source is connected to the pair of main position control stoppers via the stopper lifting transmission unit so as to transmit power thereto, thereby synchronously lifting and lowering the pair of main position control stoppers.

[0030] The present application further provides a central supply sorting method using the above-mentioned central supply sorting system, the central supply sorting method including the following steps:

[0031] S1: A plurality of objects to be sorted are sequentially placed on the input / output device, and the input / output device transports the objects to the fixed frame.

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

[0033] S3: The sorting cart receives the objects to be sorted that have been carried out from the input / output device.

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

[0035] S5: When the sorting cart lowers the objects to be sorted, the objects are dropped through the drop slide tanks onto the receiving frames corresponding to the drop slide tanks.

[0036] S6: The sorting cart moves back to the input supply device.

[0037] S7: Steps S3 to S6 are repeated.

[0038] In step S4, which is performed multiple times, the sorting cart can move toward drop slide trays located on different sides of the drop feeder.

[0039] The present invention also provides a sorting mechanism including a parallel movement guide rail, a first assembly, and a second assembly. The first assembly includes a first carriage and a first parallel movement transmission unit. The first carriage is movably attached to the parallel movement guide rail via the first parallel movement transmission unit. The second assembly includes a second carriage and a second parallel movement transmission unit. The second carriage is movably attached to the parallel movement guide rail via the second parallel movement transmission unit. The first carriage and the second carriage are movable along the same parallel movement guide rail. Movement of the two carriages along the same parallel movement guide rail significantly improves sorting efficiency. Two parallel movement transmission units for moving the two carriages are provided on both sides of the parallel movement guide rail. This prevents interference between the carriages, makes the overall structure simple and stable, and improves load-bearing capacity.

[0040] In a preferred option of 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] As a preferred option for the sorting mechanism, the first parallel movement transmission member and the second parallel movement transmission member are respectively a rack, a rope, a belt or a chain.

[0042] In a preferred option of the sorting mechanism, the parallel movement guide rail is a horizontal guide rail. The axles of the first parallel movement driving wheel, the second parallel movement driving 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 respectively installed on both sides of the parallel movement guide rail in the horizontal width direction of the parallel movement guide rail.

[0043] As a preferred option for the sorting mechanism, a receiving station is provided at a center portion of the parallel movement guide rail in the extension direction of the parallel movement guide rail, where the first and second carriages receive the objects to be sorted. Both ends of the parallel movement guide rail in the extension direction are a first guide rail end and a second guide rail end, respectively. The first parallel movement driving wheel and the first parallel movement driven wheel are provided at the first guide rail end and an end of the receiving station that is spaced apart from the first guide rail end, respectively. Furthermore, the second parallel movement driving wheel and the second parallel movement driven wheel are provided at the second guide rail end and an end of the receiving station that is spaced apart from the second guide rail end, respectively. The movement strokes of the first and second carriages overlap at the receiving station.

[0044] In a preferred option of 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] In a preferred option of 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 between the first lifting drive wheel and the first lifting driven wheel. 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 between the second lifting drive wheel and the second lifting driven wheel. 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] In a preferred option for the sorting mechanism, the first carriage and the second carriage each include a carriage frame, and two sorting rollers are provided on the carriage frame, and a sorting conveyor belt is provided between the two sorting rollers.

[0047] As a preferred option for the sorting mechanism, the sorting rollers are rotated by being driven by a transport drive source, or the sorting rollers are electrically driven rollers.

[0048] As a preferred option for the sorting mechanism, a plurality of blocking bars are provided at intervals on the outer surface of the sorting conveyor belt.

[0049] The present application further provides an input / output device including an input / output frame and a plurality of input belt conveying mechanisms attached to the input / output frame. Each input belt conveying mechanism includes a supply drive source attached to the input / output frame, a drive roller and a driven roller rotatably attached to the input / output frame, and a supply conveying belt connected to the outer periphery 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 input belt conveying mechanisms are independent of each other. In the conveying direction of the supply conveying belt, the plurality of input belt conveying mechanisms are connected in sequence and are distributed in a stepped manner from high to low. Furthermore, two adjacent input belt conveying mechanisms are disposed adjacent to each other. The plurality of input belt conveying mechanisms in the present application are driven by independent supply drive sources. Therefore, the conveying speed of the supply conveying belt of each input belt conveying mechanism is independently controlled. This allows for better control of the buffering of the sorted items on the plurality of input belt conveying mechanisms, thereby preventing excessive accumulation of the sorted items at the front end of the input / output device and improving the efficiency of the device. In addition, in this application, the multiple input belt conveying mechanisms are arranged in a stepped configuration. The heights of the multiple input belt conveying mechanisms decrease sequentially from rear to front. That is, two adjacent input belt conveying mechanisms are vertically offset, allowing the two adjacent input belt conveying mechanisms to be more closely spaced. This reduces the gap between two adjacent input belt conveying mechanisms, preventing them from falling. Furthermore, by arranging the multiple input belt conveying mechanisms in a stepped configuration from high to low, it is possible to prevent light items from bouncing up.

[0050] In a preferred option of the input feed device, each input belt transport mechanism further includes a detection unit mounted on the input feed frame, the detection unit being used to detect whether there is an object passing on the input conveyor belt of that input belt transport mechanism.

[0051] In a preferred option for the input / output device, the input / output 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 to face each other on both sides of the input / output conveyor belts of the multiple input / output belt conveying mechanisms in a direction perpendicular to the conveying direction of the input / output conveyor belts, and are higher than the input / output conveyor belts of the multiple input / output belt conveying mechanisms. The detection unit includes a grating sensor fixed to the outer side of the base guard plate and a detection opening opened in the base guard plate. The detection opening allows the grating sensor to be exposed.

[0052] In a preferred option for the input feeder, the bottom of the detection opening and the ceiling of the input conveyor belt are aligned in each input belt transport mechanism.

[0053] As a preferred option for the input supply device, a receiving and retracting area is provided at the leading end of the base guard plate in the conveying direction of the supply conveyor belt.

[0054] In a preferred embodiment of the input supply device, the input drive source is a motor, and is offset from the drive roller. Furthermore, each input belt conveying mechanism includes a transmission unit. The input drive source is connected to the drive roller through the transmission unit.

[0055] As a preferred option for the input supply device, the transmission unit includes a third driving pulley fixed to the motor shaft of the supply drive source, a third driven pulley fixed to the end of the driving roller, and a transmission belt connected to the outer periphery of the third driving pulley and the third driven pulley.

[0056] In a preferred embodiment of the input / output device, each input belt conveying mechanism further includes an adjustment unit. The adjustment unit includes an adjustment slot provided in the input / output frame, an adjustment plate fixed to the input / output frame, and an adjustment screw rotatably inserted into the adjustment plate. The adjustment slot and the adjustment screw extend vertically in the conveying direction of the input / output belt. The driven roller includes a roller shaft and a roll mounted on the outer periphery of the roller shaft for rotation. Both ends of the roller shaft are engaged with the adjustment slot and threadedly connected to the adjustment screw.

[0057] The present application further provides an input / feed device including an input / feed frame having a conveyor assembly mounting area and multiple input belt conveying mechanisms mounted on the conveyor assembly mounting area. The multiple input belt conveying mechanisms are aligned front to back along the conveying direction. Each input belt conveying mechanism includes a supply drive source, a pair of supply rollers aligned front to back along the conveying direction, and a supply conveying belt connected to the outer periphery of the pair of supply rollers. The supply rollers are rotatably supported by the input / feed frame and connected to the supply drive source for transmission of power. A substantially triangular area is formed between two adjacent input belt conveying mechanisms. The supply rollers are small-diameter rollers with a diameter of 40 mm or less. In this application, the pair of supply rollers support the upper end of the supply conveying belt, thereby providing the supply conveying belt with a conveying plane that transports the objects horizontally forward. In particular, small-diameter rollers with a diameter of 40 mm or less are used as the supply rollers. This significantly reduces the size of the approximately triangular area formed between two adjacent input belt conveying mechanisms, making it possible to make the connection between the two adjacent input belt conveying mechanisms flatter. This effectively prevents small-volume items from getting caught in the approximately triangular area, ensuring that items conveyed forward by the rear input belt conveying mechanism are smoothly handed over to the front input belt conveying mechanism. This significantly reduces the probability of items falling, ultimately ensuring the reliability and accuracy of sorting the items.

[0058] As a preferred option for the input feed device, the diameter of the feed roller is 28 to 32 mm.

[0059] In a preferred embodiment of the input / output device, the input drive source is a motor. Each input belt conveying mechanism further includes a transmission roller rotatably supported on the input / output frame, a first pulley fixed to the motor shaft of the input drive source, a second pulley fixed to the transmission roller, and a pulley transmission timing belt connected between the first pulley and the second pulley. The transmission roller contacts the inner circumferential surface of the input / output conveyor belt and is located below the pair of input rollers. The diameter of the transmission roller is larger than that of the input rollers.

[0060] In a preferred option for the input / output device, a motor mounting area is formed on the outer circumferential side of the input / output belt between one of the pair of input rollers and the transmission roller, and the input / output drive source is located in the motor mounting area and is fixed to the input / output frame.

[0061] In a preferred option for the input feed device, each of the input belt transport mechanisms further includes a tension adjustment roller and a tension adjustment assembly. The tension adjustment roller includes a roller axle and a tension drum rotatably attached to the roller axle. The tension drum contacts the outer circumferential surface of the input conveyor belt. The roller axle is attached to the input feed frame via the tension adjustment assembly so as to be movable back and forth.

[0062] In a preferred option for the input supply device, the outer peripheral surface of the supply conveyor belt is provided with at least one position-regulating rib extending in the circumferential direction. When there are a plurality of position-regulating ribs, the plurality of position-regulating ribs are aligned left and right in a direction perpendicular to the conveying direction of the input belt conveyor mechanism.

[0063] In a preferred option for the input supply device, the input supply frame is provided with a plurality of conveyor assembly mounting areas, the plurality of conveyor assembly mounting areas being aligned left and right in a direction perpendicular to the conveying direction of the input belt transport mechanism, and each of the conveyor assembly mounting areas is fitted with a plurality of input belt transport mechanisms.

[0064] The present application further provides a sorting cart including a cart frame. The cart frame is provided with two parallel sorting rollers. A sorting conveyor belt is provided between the two sorting rollers. The cart frame further includes two lateral position restriction stoppers. The lateral position restriction stoppers extend along the length of the sorting conveyor belt. The two lateral position restriction 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 ends of the sorting conveyor belt. The sorting cart further includes a main position restriction stopper for blocking objects placed on the sorting conveyor belt from passing through the first opening and / or the second opening. The provision of the main position restriction stopper provides a sorting cart with a function to prevent objects from falling. As a result, assuming the objects are received and inserted normally, the objects will not fall from the sorting cart, significantly improving sorting efficiency.

[0065] In a preferred option for the sorting cart, the main position regulating stopper is provided on the sorting conveyor belt, and in this case, the main position regulating stopper includes a plurality of blocking bars provided at intervals in the longitudinal direction of the sorting conveyor belt.

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

[0067] As a preferred option for the sorting carriage, the stopper drive source is a linear displacement stopper drive source or a rotary stopper drive source.

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

[0069] In a preferred option for the sorting carriage, the carriage frame is further provided with a plurality of running wheels.

[0070] The present application further provides a sorting cart including a cart frame, a pair of sorting rollers rotatably mounted on the cart frame, a sorting conveyor belt connected to the outer peripheries of the pair of sorting rollers, a pair of side position regulation 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 regulation stoppers distributed on 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 cart frame. The pair of side position regulation stoppers and the pair of main position regulation stoppers are mounted on the cart frame so as to be able to lift and lower. The stopper lifting drive source is connected to the pair of main position regulation stoppers via the stopper lifting transmission unit to transmit power thereto, thereby synchronously lifting and lowering the pair of main position regulation stoppers. In the present application, the objective of cost reduction is achieved by simultaneously and synchronously lifting and lowering the two main position regulation stoppers using a single stopper lifting drive source. In addition, the main position control stopper in this application moves up and down, i.e., moves up and down, which reduces the requirement for space above the main position control stopper compared to the up and down inverted movement method in the prior art, and therefore allows the sorting cart to be more easily installed in the sorting system.

[0071] In a preferred option for the sorting cart, the stopper lifting drive source is a motor, and the stopper lifting transmission unit includes a first transmission assembly connected to the motor shaft of the stopper lifting drive source for transmission, and a second transmission assembly connected to each of the main position limiting stoppers for transmission, and both of the two second transmission assemblies are connected to the first transmission assembly for transmission.

[0072] In a preferred option for the sorting cart, the second transmission assembly includes a transmission rotation shaft rotatably supported on the cart frame. The first transmission assembly is disposed outside one of the side position limiting stops. The first transmission assembly also includes a fourth driving pulley fixed to the motor shaft of the stopper lifting drive source, fourth driven pulleys fixed to the transmission rotation shafts of each second transmission assembly, and a third timing belt. The third timing belt is connected to the outer peripheries of the fourth driving pulley and the two fourth driven pulleys.

[0073] In a preferred option of the sorting cart, the first transmission assembly further includes a motor mounting frame, a tension adjustment groove opened 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 cart frame by the tension adjustment bolt. The tension adjustment groove is an oval groove.

[0074] In a preferred option for the sorting carriage, the first transmission assembly further includes two idle gears rotatably mounted on the carriage frame, the two idle gears being distributed on both sides of the fourth drive pulley and both abutting on the outer side of the third timing belt.

[0075] In a preferred option for the sorting cart, each of the second transmission assemblies includes two feed screws distributed on both ends of a main position limiting stopper, a feed nut connected to the feed screws, a fifth driven pulley fixed to each feed screw, and a fourth timing belt. The two feed screws are both vertically arranged and rotatably mounted on the cart frame. One of the feed screws is connected to the first transmission assembly. The fourth timing belt is connected to the outer periphery of the two fifth driven pulleys of the second transmission assembly. The feed nut is connected to the main position limiting stopper.

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

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

[0078] The present application further provides a dropping mechanism including a slide tank bottom plate fixed to the frame. The slide tank bottom plate has a first side edge close to the sorting cart and a second side edge away from the sorting cart. The height of the first side edge is greater than the height of the second side edge. A flexible stopper is provided on the first side edge. By providing the flexible stopper on the side of the slide tank bottom plate close to the sorting cart and reducing the distance between them, a drop prevention effect is achieved, thereby ensuring efficient operation of the sorting device. The flexible stopper also reduces the distance between the first side edge of the slide tank bottom plate and the sorting cart, and the flexible stopper itself has a certain support capacity. Therefore, if an object to be sorted that has been lowered from the sorting cart falls onto the flexible stopper, the support capacity of the flexible stopper also ensures that the object can enter the slide tank bottom plate, ensuring smooth completion of dropping.

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

[0080] As a preferred option for the dropping mechanism, a plurality of slide tank guard plates are provided at intervals on the upper surface of the slide tank bottom plate, and a drop slide tank is formed between two adjacent slide tank guard plates and the slide tank bottom plate. The sorting cart drops the objects to be sorted placed on it into a predetermined drop slide tank.

[0081] As a preferred option for the dropping mechanism, said flexible stopper comprises several flexible pads.

[0082] In a preferred option for the dropping mechanism, the flexible stopper includes a plurality of flexible strips, which are spaced apart from one another on the first side edge.

[0083] As a preferred option for the dropping mechanism, the slide tank bottom plate includes a main plate body and a bending portion connected to form an L shape. The main plate body includes the first side edge and the second side edge. The first side edge is connected to the bending portion. A plurality of through holes are provided at intervals at the connection point between the main plate body and the bending portion. The slide tank bottom plate further includes a pressing plate 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 a plurality of sets of insertion holes provided at intervals in the length direction of the first plate body. Each set of insertion holes includes a first insertion hole and a second insertion hole provided at intervals in the width direction of the first plate body. One end of the flexible strip is inserted through the through hole, the second insertion hole, and the first insertion hole in order to form a U-shaped portion. The second plate body is detachably connected to the bending portion.

[0084] In a preferred embodiment of the dropping mechanism, the second plate body has a connecting hole, and the bent portion has a fastening slot, and the connecting hole and the fastening slot are connected by a fastening member.

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

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

[0087] [Figure 1] FIG. 1 is a schematic structural diagram of a central supply and sorting system according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a plan view of FIG. [Figure 3] FIG. 3 is a schematic diagram of the assembly of the sorting carriage in the fixed frame when a single carriage structure is adopted in FIG. [Figure 4] FIG. 4 is a schematic view of FIG. 3 from another angle. [Figure 5] FIG. 5 is a schematic diagram of the assembly of the sorting carts in the fixed frame when a two-carriage structure is adopted in FIG. [Figure 6] FIG. 6 is an enlarged view of enclosure A of FIG. [Figure 7] FIG. 7 is a schematic diagram of the connection between the sorting cart and the translation frame in FIG. [Figure 8] FIG. 8 is a schematic diagram of the assembly of the sorting carriages in the fixed frame when a four-carriage structure is adopted in FIG. [Figure 9] FIG. 9 is a schematic diagram of the assembly of the four sorting carriages and the four sorting transmission mechanisms in FIG. [Figure 10] FIG. 10 is a schematic diagram of the connection between the sorting cart and the translation frame in FIG. [Figure 11] FIG. 11 is a schematic structural diagram of a central supply and sorting system according to a second embodiment of the present invention, in which the receiving device is omitted. [Figure 12] FIG. 12 is a schematic structural diagram of a central supply and sorting system according to a third embodiment of the present invention, omitting the receiving device. [Figure 13] FIG. 13 is a plan view of FIG. [Figure 14] FIG. 14 is a schematic structural diagram of a first embodiment of the feeding device of the present application. [Figure 15] 15 is a front view of the multiple input belt transport mechanism in FIG. 14. FIG. [Figure 16] FIG. 16 is a schematic structural diagram of a second embodiment of the feeding device of the present application. [Figure 17] 17 is a perspective view of two input belt transport mechanisms assembled in one transport assembly mounting area in FIG. 16. FIG. [Figure 18] FIG. 18 is a perspective view of FIG. 17 from another angle. [Figure 19] FIG. 19 is a perspective view of FIG. 18 with the base guard plate, the supply drive source, the first pulley, and the pulley transmission timing belt omitted. [Figure 20] FIG. 20 is a schematic structural diagram of the connection point between two adjacent input belt conveying mechanisms in FIG. [Figure 21] FIG. 21 is a schematic structural diagram of a sorting cart according to a first embodiment of the present invention. [Figure 22] FIG. 22 is a cross-sectional view of FIG. [Figure 23] FIG. 23 is a schematic structural diagram of a sorting cart according to a second embodiment of the present invention. [Figure 24] FIG. 24 is a schematic structural diagram of a sorting cart according to a third embodiment of the present invention. [Figure 25] FIG. 25 is an enlarged view of enclosure B of FIG. [Figure 26] FIG. 26 is an enlarged view of enclosure C of FIG. [Figure 27] FIG. 27 is a plan view of FIG. [Figure 28] FIG. 28 is a side view of FIG. [Figure 29] FIG. 29 is a schematic structural diagram of the dropping mechanism in the present application. [Figure 30] FIG. 30 is a side view of FIG. [Figure 31] FIG. 31 is an enlarged view of enclosure D in FIG. [Figure 32]32 is a schematic structural diagram of the connection between the flexible stopper, the pressing plate and the slide tank bottom plate in FIG. [Figure 33] FIG. 33 is a schematic structural diagram of the slide tank bottom plate in FIG. [Figure 34] FIG. 34 is an enlarged view of enclosure E in FIG. [Figure 35] FIG. 35 is a schematic structural diagram of the pressing plate in FIG. [Figure 36] FIG. 36 is a schematic structural diagram of the flexible strip in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0088] Hereinafter, embodiments of the present invention will be described with reference to specific examples, but those skilled in the art will easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0089] The structures, ratios, sizes, etc. shown in the drawings of the present invention are merely provided for the understanding and reading of those skilled in the art in combination with the contents disclosed in the specification, and do not define any limitations on the feasibility of the present invention, and therefore have no substantive technical meaning. Any structural additions, changes in proportional relationships, or adjustments in size are all considered to be within the scope of the technical content disclosed in the present invention, provided that they do not affect the effects and objectives that can be achieved by the present invention. Furthermore, terms such as "upper," "lower," "left," "right," "center," and "one" used in this specification are merely used for clarity of description and do not limit the scope of the present invention. Therefore, changes or adjustments in relative relationships should be considered within the scope of the present invention, as long as they do not substantially change the technical content.

[0090] It should also be understood that when a component is described as being "fixed" or "mounted" to another component, it may be directly located on the other component or intervening components may be present. Also, when a component is described as being "connected" to another component, it may be directly connected to the other component or indirectly connected to the other component through intervening components.

[0091] In addition, references to "first," "second," etc. in this application are for convenience only and should not be construed as expressing or implying relative importance or the number of technical features involved. Therefore, when a feature is limited to a "first" or "second," it may explicitly or implicitly include at least one of the feature. In addition, the technical means in each embodiment may be combined with each other, provided that such combination is feasible by a person skilled in the art. If a combination of technical means is inconsistent or impractical, such combination of technical means shall be deemed to not exist and not to fall within the scope of protection claimed in this application.

[0092] (Central supply sorting system example 1) A first embodiment of the central supply and sorting system is used to automatically sort multiple parcels. As shown in FIGS. 1 and 2 , the first embodiment of the central supply and sorting system includes a fixedly mounted stationary frame 10, a fixedly mounted input / output device 20, at least one sorting cart 30 movably mounted to the stationary frame 10, a dropping mechanism 40 mounted to the stationary frame 10, and a receiving device 50 disposed on the outer periphery of the stationary frame 10. The dropping mechanism 40 has multiple drop slide tanks 41. The multiple drop slide tanks 41 are distributed in a matrix with multiple tanks per layer. The sorting cart 30 can reciprocate between the input / output device 20 and the drop slide tank 41. The receiving device 50 has multiple receiving frames 51 that correspond one-to-one to the drop slide tanks 41. The shelves of the receiving device 50 are configured to be pushable.

[0093] The first embodiment of the central-feed sorting system has a non-terminal-feed structure. Specifically, as shown in FIGS. 1 and 2, an input / output station 101 is provided on the fixed frame 10. An input / output device 20 is provided in the input / output station 101 of the fixed frame 10. Furthermore, on each of the different sides of the input / output device 20, a drop slide tank 41 and a receiving device 50 are provided on the fixed frame 10. This allows the sorting cart 30 to receive the items to be sorted (e.g., parcels, etc.) at the input / output station 101, and the sorting cart 30 to move to the different side of the input / output station 101 and transfer the items to be sorted.

[0094] The present application further provides a central supply sorting method performed using the central supply sorting system, the central supply sorting method including the following steps:

[0095] Step S1: A plurality of objects to be sorted are sequentially placed on the input / output device 20, which then transports the objects toward the fixed frame 10. In this embodiment, the input / output device 20 transports the objects toward the front. Therefore, the input direction of the input / output device 20 is the forward direction.

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

[0097] Step S3: The sorting cart 30 receives the objects to be sorted carried out from the input / output device 20.

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

[0099] Step S5: When the sorting cart 30 lowers the object, the object is dropped through the drop slide tank 41 onto the receiving frame 51 corresponding to the drop slide tank 41. This completes the automatic sorting of one object.

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

[0101] Step S7: Steps S3 to S6 are repeated to complete the automatic sorting of the plurality of objects to be sorted in order. That is, in the process of repeating steps S3 to S6 multiple times to sort the plurality of objects to be sorted, 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 the receiving device 50 are provided on the fixed frame 10 on each different side of the input / output device 20, it is possible to move the sorting cart 30 toward the drop slide tank 41 located on each different side of the input / output device 20 to transport the objects to be sorted. Therefore, unlike the prior art, the objects to be sorted are not limited to being transported to the same side of the input / output device 20.

[0102] In other words, in the present application, the loading / feeding station 101 and the loading / feeding device 20 are provided at non-terminal positions in the extension direction of the fixed frame 10, and the dropped slide tank 41 and the receiving device 50 are provided on either side of the loading / feeding station 101 or the loading / feeding device 20, resulting in a central supply structure or a non-terminal supply structure. Compared to the terminal supply structure of the prior art in which the loading / feeding station 101 and the loading / feeding device 20 are provided at one end in the extension direction of the fixed frame 10, assuming the same number of dropped slide tanks 41 are provided, in the present application, the distance traveled by the sorting cart 30 in the extension direction of the fixed frame 10 during one sorting run can be shortened, thereby reducing the time required for one sorting run. Furthermore, assuming the same travel distance of the sorting cart 30, a greater number of dropped slide tanks 41 can be provided in the present application. Consequently, ultimately, the present application effectively improves sorting efficiency.

[0103] Furthermore, the fixed frame 10 may have multiple configurations. As shown in FIGS. 1 and 2 , in the first embodiment of the central supply sorting system, the fixed frame 10 is a linear frame extending in one direction. That is, the fixed frame 10 is linearly shaped and extends vertically in a direction perpendicular to the feeding direction of the feeding device 20. Therefore, the linearly shaped fixed frame 10 extends vertically along its length. For convenience of description, the extension direction of the linearly shaped fixed frame 10 is defined as the left-right direction. That is, the fixed frame 10 extends in the left-right direction. In FIG. 2 , the length direction of the fixed frame 10 is the left-right direction on the paper. The width direction of the fixed frame 10 is the front-rear direction, which is the up-down direction on the paper from the perspective of FIG. 2 . The height direction of the fixed frame 10 is the up-down direction, which is the front-to-back direction on the paper from the perspective of FIG. 2 . The feeding direction of the feeding device 20 is the forward direction.

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

[0105] Furthermore, in the first embodiment of the central feed sorting system, the loading / unloading station 101 and the loading / unloading device 20 may be installed at various positions along the length of the fixed frame 10, such as at the right side of the center of the fixed frame 10, at the left side of the center of the fixed frame 10, or at the center of the fixed frame 10. The specific installation positions may be determined based on actual needs. In this embodiment, as shown in FIGS. 1 and 2, the loading / unloading station 101 and the loading / unloading device 20 are both installed at the center of the fixed frame 10 along the length of the fixed frame 10. Furthermore, the loading / unloading device 20 is installed at the rear side of the fixed frame 10 along the width of the fixed frame 10. Therefore, the loading / unloading device 20 transports the objects to be sorted forward.

[0106] Furthermore, as shown in FIGS. 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. That is, two dropping mechanisms 40 are provided on the front side of the fixed frame 10, one on each of the left and right sides of the input / output station 101 and the input / output device 20. Also, two dropping mechanisms 40 are provided on the rear side of the fixed frame 10, one on each of the left and right sides of the input / output station 101 and the input / output device 20. Each dropping mechanism 40 has a plurality of dropping slide tanks 41. Furthermore, one receiving device 50 is disposed on each outer periphery of each dropping mechanism 40 in the front / rear direction. Therefore, in Example 1 of the central supply sorting system, four dropping mechanisms 40 and four receiving devices 50 that work together are provided, thereby improving sorting efficiency. Based on this structure, as shown in FIGS. 1 and 2, the fixed frame 10 includes two gantries 103, one at the front and one at the rear, and a plurality of fixed connecting rods 104 fixedly connected between the two gantries 103. A cart movement area 102 is formed between the two gantries 103, allowing the sorting cart 30 to move. The two front, left and right drop mechanisms 40 are both fixed to the front gantry 103, and the two rear, left and right drop mechanisms 40 are both fixed to the rear gantry 103. Therefore, it can be said that the cart movement area 102 is formed between the two front and rear drop mechanisms 40 of each sorting subsystem. An area constituting the input / output station 101 is provided at least in the center of the gantry 103.

[0107] Furthermore, in the first embodiment of the central supply sorting system, at least one sorting cart 30 is movably mounted between the two gantries 103 at the front and rear of the fixed frame 10. That is, the number of sorting carts 30 may be one, two, four, or more. The number of sorting carts 30 is determined according to actual needs. Deploying a larger number of sorting carts 30 is advantageous for improving sorting efficiency. Depending on the number of sorting carts 30, the first embodiment of the central supply sorting system may have multiple structures. Furthermore, in the first embodiment of the central supply sorting system, the reciprocating motion of the sorting cart 30 between the input / output device 20 and the drop slide tank 41 is left-right and up-down. Three preferred structures for the first embodiment of the central supply sorting system are presented below.

[0108] (Example 1 of a central supply and sorting system with a single cart structure) 3 shows a first embodiment of the central feed sorting system having a single carriage structure. That is, one sorting carriage 30 is provided. The single sorting carriage 30 can move within the area on both the left and right sides of the input / output station 101 in the longitudinal direction of the fixed frame 10. That is, after receiving sorted items from the input / output device 20, the sorting carriage 30 can move either leftward or rightward.

[0109] Furthermore, the movement mode of one sorting cart 30 on the fixed frame 10 is left-right movement in the length direction of the fixed frame 10 and lifting up and down in the height direction of the fixed frame 10. Based on this, one sorting cart 30 is attached to the fixed frame 10 so as to be able to move left-right and lift up and down by one sorting transmission mechanism 60. As a preferred structure of the sorting transmission mechanism 60, as shown in FIGS. 3 and 4 , 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 combined with the parallel movement guide rail 61 so as to slide on it, 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 left and right in the length direction of the fixed frame 10. Furthermore, the left and right ends of the parallel movement guide rail 61 extend to the left and right ends of the fixed frame 10, respectively. As a result, the parallel movement guide rail 61 spans the two left and right dropping mechanisms 40 and the loading and 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 the parallel movement frame 63 for transmission, and moves the parallel movement frame 63 left and right along the parallel movement guide rail 61. The sorting cart 30 is combined with the vertical movement guide rail 65 for sliding movement. The vertical movement drive source 64 is connected to the sorting cart 30 for transmission, and moves the sorting cart 30 up and down along the vertical movement guide rail 65. In addition, in a central supply sorting system with a single cart structure, the parallel movement guide rail 61 is located at a central position between the two front and rear gantries 103 in the longitudinal direction. The parallel movement frame 63 has a rectangular column structure.

[0110] 3 and 4, the translation drive source 62 is a translation drive motor fixed to the ceiling of the fixed frame 10. The vertical movement drive source 64 is a vertical movement drive motor fixed to the ceiling of the translation frame 63. The translation drive motor is connected to the translation frame 63 via a first timing belt transmission assembly 66. The first timing belt transmission assembly 66 includes a first driving pulley 661 and a first driven pulley 662 rotatably supported by the fixed frame 10, and a first timing belt 663 connected to the outer peripheries of the first driving pulley 661 and the first driven pulley 662. The translation drive motor is connected to the first driving pulley 661, and the first timing belt 663 is fixedly connected to the translation frame 63. The axles of the first driving pulley 661 and the first driven pulley 662 both extend vertically. 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 driving pulley 671 and a second driven pulley 672 rotatably supported on the translation frame 63, and a second timing belt 673 connected to the outer peripheries of the second driving pulley 671 and the second driven pulley 672. The longitudinal movement drive motor is connected to the second driving pulley 671, and the second timing belt 673 is fixedly connected to the sorting cart 30. The first driving pulley 661 and the first driven pulley 662 are respectively assembled to the left and right ends of the fixed frame 10 so that the extension path of the first timing belt 663 covers the input / output station 101. In addition, the second driving pulley 671 and the second driven pulley 672 are respectively assembled to the upper and lower ends of the translation frame 63 so that the extension path of the second timing belt 673 covers the input / output station 101. In this way, the movement of the first timing belt 663 moves the parallel movement frame 63 and the sorting cart 30 left and right, and the movement of the second timing belt 673 moves the sorting cart 30 up and down, allowing the sorting cart 30 to move up to the input / output station 101. In this embodiment, the sorting cart 30 moves up to the front lower end of the input / output device 20, allowing it to receive the objects to be sorted that the input / output device 20 carries forward.

[0111] As shown in FIG. 3, the sorting transmission mechanism 60 preferably includes two parallel translation guide rails 61, one above the other. The ceiling of the parallel translation frame 63 is slidably coupled to the upper parallel translation guide rail 61, and the bottom of the parallel translation frame 63 is slidably coupled to the lower parallel translation guide rail 61. The parallel translation drive motor is connected to the parallel translation frame 63 via two first timing belt transmission assemblies 66, one above the other. This improves the stability of the left-right movement of the parallel translation frame 63. The sorting transmission mechanism 60 further includes a first driving rotation shaft 68 that extends vertically and is rotatably attached to the left side of the fixed frame 10 via a bearing housing. The upper end of the first driving rotation shaft 68 is fixedly connected to the motor shaft of the parallel translation drive motor via a shaft coupling. The first driving pulleys 661 of the two first timing belt transmission assemblies 66 are fixedly fastened to the first driving rotation shaft 68 with screws.

[0112] Preferably, as shown in Figures 3 and 4, a plurality of rotatable traveling wheels 610 and a plurality of rotatable guide wheels 611 are attached to both the ceiling and bottom of the translation frame 63. The axes of the traveling wheels 610 extend vertically in the front-to-rear direction. The traveling wheels 610 are mounted in the guide rail grooves of the translation guide rails 61. The axes of the guide wheels 611 extend vertically in the up-down direction. The guide wheels 611 abut on both the front and rear sides of the translation guide rails 61.

[0113] (Example 1 of a central supply and sorting system with a two-car bogie structure) 5 shows a first embodiment of the central supply sorting system having a two-cart structure. That is, two sorting carts 30 are provided. Both sorting carts 30 are movable in the longitudinal direction of the fixed frame 10 within the areas on both the left and right sides of the input / output station 101. That is, after each sorting cart 30 receives an object to be sorted from the input / output device 20, it can move either leftward or rightward.

[0114] Furthermore, the movement modes of the two sorting carts 30 on the fixed frame 10 are both left-right movement in the length direction of the fixed frame 10 and lifting and lowering in the height direction of the fixed frame 10. Based on this, each sorting cart 30 is attached to the fixed frame 10 so that it can move left-right and lift up and down by a single sorting transmission mechanism 60. See Figures 3, 4 and 5. 5, the structure of each sorting transmission mechanism 60 is similar to that of the sorting transmission mechanism 60 in the single-cart central supply sorting system of Example 1, and includes a fixedly provided parallel movement guide rail 61, a parallel movement frame 63 slidably coupled to the parallel movement guide rail 61, a parallel movement drive source 62 for moving 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 for moving 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 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 / output station 101. In addition, the second driving pulley 671 and the second driven pulley 672 are respectively assembled to the upper and lower ends of the parallel moving frame 63 so that the extension path of the second timing belt 673 covers the input supply station 101 .

[0115] However, in the first embodiment of the two-carriage central supply sorting system, as shown in FIG. 5, a pair of parallel movement guide rails 61 in a sorting transmission mechanism 60 connected to one sorting cart 30 is disposed in front of the rear gantry 103 in the front-to-rear direction. The parallel movement frame 63 of the sorting transmission mechanism 60 moves left and right adjacent to the front of the rear gantry 103. Furthermore, a pair of parallel movement guide rails 61 in a sorting transmission mechanism 60 connected to the other sorting cart 30 is disposed behind the front gantry 103 in the front-to-rear direction. The parallel movement frame 63 of the sorting transmission mechanism 60 moves left and right adjacent to the rear of the front gantry 103. Furthermore, as shown in FIG. 7, the parallel movement frame 63 is a flat frame that is narrow in the front-to-rear direction. The sorting cart 30 has a cantilever mounting structure in which its front-to-rear end is attached to the parallel movement frame 63. In the front-to-rear direction, the gap between one end of the sorting cart 30 extending from the translation frame 63 and the gantry 103 on the opposite side of the translation frame 63 allows the translation frame 63 of another sorting transmission mechanism 60 to pass through. This reliably ensures that the translation frames 63 of the two sorting transmission mechanisms 60 do not interfere with each other when the two sorting carts 30 are moved independently left and right and up and down using the two sorting transmission mechanisms 60. Furthermore, it becomes possible for both sorting carts 30 to move to the input / output station 101 to receive the objects to be sorted.

[0116] As shown in FIG. 7 , the vertical movement drive motor preferably moves the sorting cart 30 up and down along the vertical movement guide rail 65 via two second timing belt transmission assemblies 67 (left and right). The two second timing belt transmission assemblies 67 are attached to the left and right sides of the translation frame 63, respectively, improving stability when moving the cantilever-mounted sorting cart 30 up and down. Based on this, each sorting transmission mechanism 60 further includes a second drive rotary shaft 69 extending left and right and rotatably attached to the ceiling of the translation frame 63 via a bearing housing. The right end of the second drive rotary shaft 69 is fixedly connected to the motor shaft of the vertical movement drive motor via a shaft coupling. Furthermore, the second drive pulleys 671 of the two second timing belt transmission assemblies 67 (left and right) are fixedly fastened to the second drive rotary shaft 69 with screws.

[0117] Preferably, as shown in Figures 6 and 7, a plurality of rotatable traveling wheels 610 and a plurality of rotatable guide wheels 611 are attached to the ceiling and bottom of each translation frame 63. The axes of the traveling wheels 610 extend vertically in the front-to-rear direction. Furthermore, pairs of traveling wheels 610 are attached to the same axle. The two traveling wheels 610 in each pair abut on both the front and rear sides of the translation guide rail 61. The axes of the guide wheels 611 extend vertically in the front-to-rear direction. The guide wheels 611 abut on both the front and rear sides of the translation guide rail 61.

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

[0119] Furthermore, the movement method of the four sorting carts 30 on the fixed frame 10 is to move left and right in the length direction of the fixed frame 10 and to rise and fall in the height direction 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 left and right and rise and fall. 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 Example 1 of the two-carriage central supply sorting system, and includes a fixedly installed parallel movement guide rail 61, a parallel movement frame 63 which is a flat frame and is combined with the parallel movement guide rail 61 so as to slide along it, 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 cart 30 up and down along the vertical movement guide rail 65 via two left and right second timing belt transmission assemblies 67.

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

[0121] Furthermore, the two first timing belt transmission assemblies 66 connected to the two translation frames 63 sharing the same translation guide rail 61 are shifted forward and backward in the width direction of the fixed frame 10. Taking the left rear translation frame 63 and the right rear translation frame 63 sharing the same rear translation guide rail 61 as an example, as shown in FIG. 9 , in the sorting transmission mechanism 60 where the left rear translation frame 63 is located, the first drive pulley 661 is disposed at the left end of the fixed frame 10, and the first driven pulley 662 is disposed at the right end of the input / output station 101. As a result, the extension path of the first timing belt 663 in the sorting transmission mechanism 60 covers the input / output station 101. In addition, the first drive pulley 661 and the first driven pulley 662 in the sorting transmission mechanism 60 are both disposed on the rear side of the translation guide rail 61 (i.e., on the outer side in the width direction). That is, the first timing belt 663 in the sorting transmission mechanism 60 is disposed on the rear side of the parallel movement guide rail 61 (i.e., on the outer side in the width direction). Furthermore, in the sorting transmission mechanism 60 in which the right rear parallel movement frame 63 is located, the first drive pulley 661 is disposed at the right end of the fixed frame 10, and the first driven pulley 662 is disposed at the left end of the input / output station 101. As a result, the extension path of the first timing belt 663 in the sorting transmission mechanism 60 covers the input / output station 101. Furthermore, both the first drive pulley 661 and the first driven pulley 662 in the sorting transmission mechanism 60 are disposed on the front side of the parallel movement guide rail 61 (i.e., on the inner side in the width direction). That is, the first timing belt 663 in the sorting transmission mechanism 60 is disposed on the front side of the parallel movement guide rail 61 (i.e., on the inner side in the width direction). In this way, by shifting the first timing belt transmission assemblies 66 of the two translation frames 63 that move left and right along the same translation guide rail 61 back and forth, interference between them is avoided.In particular, the movement strokes of two parallel moving frames 63 and the sorting carts 30 thereon that share the same parallel moving guide rail 61, or the parallel moving frame 63 and the sorting carts 30 thereon that move along the same parallel moving guide rail 61, in the extension direction of the parallel moving guide rail 61, overlap at the input / output station 101. This allows both sorting carts 30 on the two parallel moving frames 63 to move to the input / output station 101 to receive objects, thereby meeting the receiving requirements in the case of central supply.

[0122] Preferably, as shown in FIG. 10 , a plurality of rotatable traveling wheels 610 and a plurality of rotatable guide wheels 611 are attached to the ceiling and bottom of each translation frame 63. The axes of the traveling wheels 610 extend vertically in the front-to-rear direction. Furthermore, pairs of traveling wheels 610 are attached to the same axle. The two traveling wheels 610 in each pair abut on both the front and rear sides of the translation guide rail 61. The axes of the guide wheels 611 extend vertically in the front-to-rear direction. The guide wheels 611 abut on both the front and rear sides of the translation guide rail 61.

[0123] Based on this, the present application further provides a sorting mechanism in which two sorting carts 30 (left and right) and a sorting transmission mechanism 60 move along the same parallel movement guide rail 61 without interfering with each other. Therefore, Example 1 of a four-carriage central supply sorting system includes two of the above-mentioned 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 in which the rear parallel movement guide rail 61 is located, the first assembly includes a first cart (i.e., the first sorting cart 71) and a first parallel movement transmission unit (i.e., the sorting transmission mechanism 60 connected to the first sorting cart 71). Furthermore, the second assembly includes a second cart (i.e., the third sorting cart 73) and a second parallel movement transmission unit (i.e., the sorting transmission mechanism 60 connected to the third sorting cart 73). Similarly, in the sorting mechanism where the front parallel movement guide rail 61 is located, the first assembly includes a first carriage (i.e., the second sorting carriage 72) and a first parallel movement transmission unit (i.e., the sorting transmission mechanism 60 connected to the second sorting carriage 72). Also, the second assembly includes a second carriage (i.e., the fourth sorting carriage 74) and a second parallel movement transmission unit (i.e., the sorting transmission mechanism 60 connected to the fourth sorting carriage 74).

[0124] The sorting mechanism in which the rear parallel movement guide rail 61 is located will now be described in further detail. In this sorting mechanism, the parallel movement drive source 62, first timing belt transmission assembly 66, first drive pulley 661, first driven pulley 662, and first timing belt 663 in the sorting transmission mechanism 60 connected to the first sorting cart 71 respectively constitute the first parallel movement drive source, first parallel movement transmission unit, first parallel movement drive wheel, first parallel movement driven wheel, and first parallel movement transmission member of the first assembly. Also, the parallel movement drive source 62, first timing belt transmission assembly 66, first drive pulley 661, first driven pulley 662, and first timing belt 663 in the sorting transmission mechanism 60 connected to the third sorting cart 73 respectively constitute the second parallel movement drive source, second parallel movement transmission unit, second parallel movement drive wheel, second parallel movement driven wheel, and second parallel movement transmission member of the second assembly. In this embodiment, the first translation transmission unit and the second translation transmission unit are both timing belt transmission assemblies, but in other embodiments, a sprocket and chain assembly, a rack and pinion assembly, etc. are also selectable. In the extension direction of the rear translation guide rail 61, the input supply station 101 at the center of the translation guide rail 61 is provided with a receiving station where the first sorting cart 71 and the third sorting cart 73 receive the sorted objects. In addition, 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 second timing belt transmission assembly 67 of the sorting transmission mechanism 60 connected to the first sorting carriage 71 respectively constitute the first parallel movement frame and first lifting transmission unit of the first assembly. Furthermore, the parallel movement frame 63 and second timing belt transmission assembly 67 of the sorting transmission mechanism 60 connected to the third sorting carriage 73 respectively constitute the second parallel movement frame and second lifting transmission unit of the second assembly.

[0126] (Central Supply Sorting System Example 2) 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 a corner. The input / output station 101 and the input / output device 20 are both provided at the corner of the fixed frame 10 in the extension direction of the fixed frame 10. In the input direction of the input / output device 20, a sorting subsystem is provided on the opposite side (i.e., the front side) of the input / output device 20. Furthermore, in the direction perpendicular to the input direction of the input / output device 20, a sorting subsystem is provided on the left side or right side of the input / output device 20. Therefore, Example 2 of the central input / sorting system has two sorting subsystems. Each sorting subsystem includes a part 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 FIG. 11, 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 FIG. 11 , in each sorting subsystem, a drop mechanism 40 is provided on both sides of the fixed frame 10 perpendicular to its extension direction, and a carriage movement area 102 is formed between the two drop mechanisms 40 to allow movement of the sorting carriage 30. Specifically, in the sorting subsystem located in front of the input / output station 101 and the input / output device 20, the fixed frame 10 of that portion extends vertically in the front-to-rear direction. On both the left and right sides of the fixed frame 10 of that portion, one drop mechanism 40 is provided, located in front of the input / output station 101 and the input / output device 20. Furthermore, one receiving device 50 is disposed on each of the left and right outer edges of each drop mechanism 40. The fixed frame 10 of that portion includes two gantries 103, one on the left and one on the right, and a plurality of fixed connecting rods 104 fixedly connected between the two gantries 103. The carriage movement area 102 is formed between the two gantries 103. Furthermore, in the sorting subsystem located to the right of the input / output station 101 and the input / output device 20, the fixed frame 10 of that portion extends flatly in the left-right direction. A drop mechanism 40 is provided on each of the front and rear sides of the fixed frame 10 of that portion, located to the right of the input / output station 101 and the input / output device 20. A receiving device 50 is also disposed on the outer periphery of each drop mechanism 40 in the front-to-rear direction. The fixed frame 10 of that portion includes two gantries 103, one in the front and one in the rear, and a plurality of fixed connecting rods 104 fixedly connected between the two gantries 103. A carriage movement area 102 is formed between the two gantries 103. Therefore, the input / output station 101 and the input / output device 20 are formed at the connection point between the fixed frame 10 extending forward and backward and the fixed frame 10 extending left and right.

[0128] Of course, in other embodiments, the fixed frame 10 may be V-shaped, and the input / output station 101 and the input / output device 20 may both be provided at corners of the fixed frame 10 in the extension direction of the fixed frame 10.

[0129] (Central Supply Sorting System Example 3) As shown in FIGS. 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 a corner. The input / output station 101 and the input / output device 20 are both provided at the corner of the fixed frame 10 in the extension direction of the fixed frame 10. A sorting subsystem is provided on the opposite side (i.e., the front side) of the input / output device 20 in the input direction of the input / output device 20. Furthermore, a sorting subsystem is provided on both the left and right sides of the input / output device 20 in the direction perpendicular to the input direction of the input / output device 20. Therefore, the third embodiment of the central input / sorting system has three sorting subsystems. Each sorting subsystem includes a part of the fixed frame 10, a drop slide tank 41, and a receiving device 50.

[0130] Further, please refer to FIGS. 1, 2, 12, and 13. As shown in FIGS. 12 and 13, in each sorting subsystem, a dropping mechanism 40 is provided on both sides of the fixed frame 10 perpendicular to its extension direction, and a cart movement area 102 is formed between the two dropping mechanisms 40, allowing the sorting cart 30 to move. Specifically, in the sorting subsystem located in front of the input / output station 101 and the input / output device 20, the fixed frame 10 of that portion extends vertically in the front-to-rear direction. On both the left and right sides of the fixed frame 10 of that portion, one dropping mechanism 40 is provided, located in front of the input / output station 101 and the input / output device 20. In addition, one receiving device 50 is disposed on each of the left and right outer edges of each dropping mechanism 40. The fixed frame 10 of that portion includes two gantries 103, one on the left and one on the right, and a plurality of fixed connecting rods 104 fixedly connected between the two gantries 103. The carriage movement area 102 is formed between two gantries 103 on the left and right sides. The stationary frame 10 of the left-hand and right-hand sorting subsystems located to the left and right of the loading / unloading station 101 and the loading / unloading device 20 extends horizontally. A drop mechanism 40 is provided on each of the front and rear sides of the stationary frame 10 on the left side, located to the left of the loading / unloading station 101 and the loading / unloading device 20. A drop mechanism 40 is provided on each of the front and rear sides of the stationary frame 10 on the right side, located to the right of the loading / unloading station 101 and the loading / unloading device 20. A receiving device 50 is disposed on the outer periphery of each drop mechanism 40 in the front-rear direction. Both the stationary frame 10 on the left side and the stationary frame 10 on the right side include two gantries 103 on the front and rear sides and a plurality of fixed connecting rods 104 fixedly connected between the two gantries 103. The carriage movement area 102 is formed between the two gantries 103 on the front and rear sides. Therefore, the input / output station 101 and the input / output device 20 are formed at the connection point between the fixed frame 10 extending forward / backward and the fixed frame 10 extending left / right, and are located at the center position of the fixed frame 10 extending left / right.

[0131] Furthermore, in the above-described central supply sorting system, in Examples 2 and 3, the sorting cart 30 moves parallel to the extension direction of the fixed frame 10 and moves vertically. Based on this, it is preferable that the sorting cart 30 be configured with two carts. That is, the sorting cart 30 includes a lateral-moving cart that moves in the extension direction of the fixed frame 10 and a lifting cart that moves vertically. Furthermore, one lifting cart and multiple lateral-moving carts are disposed on the fixed frame 10 of each sorting subsystem. The multiple lateral-moving carts are distributed vertically and correspond to the multiple upper and lower layers of drop slide tanks 41 in that sorting subsystem. Furthermore, the lifting carts are distributed on the outer periphery of the input / output device 20. During sorting, the lifting cart receives the objects on the input / output device 20. When the input supply device 20 transfers the objects to be sorted onto the lifting cart, the lifting cart moves up or down to the lateral movement cart corresponding to the layer where the target drop slide tank 41 is located, and transfers the objects to the lateral movement cart. Then, when the lateral movement cart moves to the target drop slide tank 41 and drops the objects to be sorted, the objects are dropped through the drop slide tank 41 into the receiving frame 51 corresponding to the drop slide tank 41.

[0132] Furthermore, the input feeder 20 used in the multiple embodiments of the central feed sorting system has multiple preferred embodiments.

[0133] (First embodiment of the input supply device 20) As shown in FIGS. 14 and 15 , the first embodiment of the input / output device 20 includes an input / output frame 21 and multiple input belt conveying mechanisms 22 attached to the input / output frame 21. The number of input belt conveying mechanisms 22 may be two, three, or more, depending on actual needs. The input / output frame 21 may be fixedly connected to the fixed frame 10 or may be fixedly attached independently with anchor bolts. The input belt conveying mechanisms 22 convey the objects forward. Each input belt conveying mechanism 22 includes a supply conveying support table, a pair of supply rollers 222 rotatably attached to both the front and rear sides of the supply conveying support table, 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 driving source 221 (e.g., a motor). Alternatively, the supply rollers 222 can be electrically driven rollers. The supply conveying support table is a base frame 211, which will be described later. In the embodiment shown in FIGS. 14 and 15 , a supply drive source 221 is provided in each input belt conveying mechanism 22. Each input belt conveying mechanism 22 includes a pair of supply rollers 222, each consisting of a drive roller 2221 and a driven roller 2222. 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 conveyor belt 223 conveys the items forward, the multiple input belt conveying mechanisms 22 are connected in order from rear to front, and are arranged in a stepped pattern from high to low. Therefore, the input belt conveying mechanism 22 located at the rearmost position is the highest, and the input belt conveying mechanism 22 located at the frontmost position is the lowest. Furthermore, two adjacent input belt conveying mechanisms 22 are arranged adjacent to each other.

[0134] In the first embodiment of the input supply device 20, each input belt conveying mechanism 22 is driven by an independent supply drive source 221. Therefore, the conveying speed of the input conveying belt 223 of each input belt conveying mechanism 22 is independently controlled. This allows for better control of the buffering of the objects on the multiple input belt conveying mechanisms 22, preventing excessive accumulation of objects at the front end of the input supply device 20 and improving the efficiency of the device. In addition, in the present application, the multiple input belt conveying mechanisms 22 are arranged in a stepped manner. The heights of the multiple input belt conveying mechanisms 22 decrease sequentially from rear to front. That is, two adjacent input belt conveying mechanisms 22 are vertically offset, allowing the two adjacent input belt conveying mechanisms 22 to be more closely positioned. This reduces the gap between two adjacent input belt conveying mechanisms 22, preventing objects from falling. Furthermore, by distributing the multiple input belt conveying mechanisms 22 in a stepped manner from high to low, it is possible to prevent a recess from being formed in the center of the supply conveying belt 223. This prevents the problem of light objects bouncing up on the supply conveying belt 223, and ensures reliable supply.

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

[0136] 14, the loading / feeding frame 21 preferably 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 both left and right sides of the supply conveyor belts 223 of the multiple loading belt conveying mechanisms 22 in a direction perpendicular to the conveying direction of the supply conveyor belts 223. The base guard plates 212 are also higher than the supply conveyor belts 223 of the multiple loading belt conveying mechanisms 22. The provision of the base guard plates 212 makes it possible to prevent the objects on the supply conveyor belts 223 from falling from both left and right sides, thereby improving the reliability of the forward transport of the objects.

[0137] Furthermore, as shown in FIG. 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 is an object passing on the supply conveying belt 223 of that input belt conveying mechanism 22. This allows the detection of whether the first object on the input supply device 20 is passing forward and whether the last object is passing forward, which can be used for sorting start control and sorting stop control. In addition, it is possible to detect the length of the object being conveyed on the input supply device 20, and if the length of the object exceeds a threshold, it is determined to be an incorrect input. In this case, a warning is issued to improve work safety.

[0138] 14, the detection unit preferably 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 ceiling of the supply conveyor belt 223 are aligned, making it possible to more reliably detect whether or not there are any articles to be sorted passing on the supply conveyor belt 223.

[0139] 14, in the conveying direction in which the supply conveyor belt 223 conveys the objects forward, a receiving evacuation area 214 is provided at the tip (i.e., front end) of the base guard plate 212. This prevents the base guard plate 212 from interfering with the sorting cart 30 of the sorting system receiving the objects.

[0140] 14, the supply drive source 221 is distributed so as to be offset from the drive roller 2221. Furthermore, 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 structure in which the supply drive source 221 and the drive roller 2221 are distributed so as to be offset from each other allows the left-right dimension of the input feeder 20 to be reduced, making it convenient for installation in a sorting system. Preferably, the transmission unit includes a third driving 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 periphery of the third driving pulley 224 and the third driven pulley 225.

[0141] 14 and 15, each feeding belt conveying mechanism 22 further includes an adjustment unit. The adjustment unit includes an adjustment slot 215 formed in the feeding frame 21, an adjustment plate 24 fixed to the feeding frame 21, and an adjustment screw 25 rotatably inserted into the adjustment plate 24. The adjustment slot 215 and the adjustment screw 25 both extend vertically in the front-to-rear direction along the conveyance direction of the feeding conveyor belt 223. The driven roller 2222 includes a roller shaft 2223 and a roll attached to the outer periphery of the roller shaft 2223 for rotation. Both ends of the roller shaft 2223 are engaged with the adjustment slot 215 and are threadedly engaged with the adjustment screw 25. By rotating the adjustment screw 25, the front-to-rear position of the roller shaft 2223 of the driven roller 2222 within the adjustment slot 215 can be adjusted. That is, by adjusting the front and rear positions of the driven roller 2222, the degree of tension of the supply conveyor belt 223 in the input belt conveyor mechanism 22 can be adjusted, making it possible to convey the sorted objects forward more reliably.

[0142] (Example 2 of the input supply device 20) As shown in FIG. 16 , a second embodiment of the input supply device 20 includes an input supply frame 21 having a conveying assembly mounting area 216 and a plurality of input belt conveying mechanisms 22 mounted on the conveying assembly mounting area 216. The conveying direction of the input belt conveying mechanisms 22 is the conveying direction of the input supply device 20, which is also the forward direction. The plurality of input belt conveying mechanisms 22 are arranged front to back along the conveying direction. The number of input belt conveying mechanisms 22 mounted on one conveying assembly mounting area 216 can be determined according to actual needs and may be two, three, four or more. In the embodiment shown in FIG. 16 , two input belt conveying mechanisms 22 are mounted on one conveying assembly mounting area 216.

[0143] As shown in FIGS. 17 to 20, base guard plates 212 are fixed to the input / output frame 21 on both the left and right sides of the conveyor assembly mounting area 216. The base guard plates 212 are part of the input / output frame 21. Each input belt conveying mechanism 22 includes a supply drive source 221, a pair of supply rollers 222 aligned front to back along the conveyance direction, and a supply conveyor belt 223 connected to the outer periphery of the pair of supply rollers 222. The pair of supply rollers 222 are arranged at the same height. Therefore, the supply conveyor belt 223 has a conveying plane connected to the upper ends of the pair of supply rollers 222. Both left and right ends of the supply roller 222 are rotatably supported by the base guard plates 212 of the input / output frame 21 and are connected to the supply drive source 221 for power transmission. A substantially triangular region 218 is formed between two adjacent input belt conveying mechanisms 22. The supply rollers 222 are small-diameter rollers with a diameter of 40 mm or less. That is, the supply roller 222 is a roller with an unusual outer diameter, and a small diameter roller that is much smaller than the ordinary outer diameter is used.

[0144] In the input / output device 20 according to the present application, when the input drive source 221 operates, the pair of input rollers 222 rotate, and simultaneously the input conveyor belt 223 also rotates. A sorter places multiple objects awaiting sorting on the conveying plane of the input conveyor belt 223 of the rearmost input belt conveying mechanism 22 of the input / output device 20. The input conveyor belt 223 of the input belt conveying mechanism 22 conveys the objects forward. In particular, a small-diameter roller with a diameter of 40 mm or less is used for the input roller 222 according to the present application. This significantly reduces the size of the approximately triangular region 218 formed between two adjacent input belt conveying mechanisms 22, making it possible to make the connection between the two adjacent input belt conveying mechanisms 22 flatter. This effectively prevents small-volume objects from getting caught in the approximately triangular region 218, ensuring that objects conveyed forward by the rear input belt conveying mechanism 22 are smoothly handed over to the front input belt conveying mechanism 22. This significantly reduces the probability of objects falling, ultimately ensuring the reliability and accuracy of sorting the objects. Finally, the objects are conveyed forward by the supply conveyor belts 223 of the multiple input belt conveying mechanisms 22 and then transported to the front end of the input supply device 20. The objects are then received by the sorting cart 30. Therefore, the rear end of the input supply device 20 is the supply end for the objects, and the front end of the input supply device 20 is the discharge end for the objects.

[0145] In this embodiment of the input 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 input conveying belt 223 of each input belt conveying mechanism 22 is controlled independently. This allows for better control of the buffering of the objects on the multiple input belt conveying mechanisms 22, preventing excessive accumulation of objects at the front end of the input supply device 20 and improving the efficiency of the device.

[0146] Preferably, the diameter of the supply roller 222 in the present application is 28 to 22 mm, which effectively prevents small-volume objects from getting caught in the approximately triangular area 218, and also allows the supply roller 222 to exhibit good support performance for the supply conveyor belt 223.

[0147] Furthermore, when a small-diameter roller is used as the supply roller 222, the contact area between the supply roller 222 and the supply conveyor belt 223 inevitably decreases. In other words, the frictional force between the supply roller 222 and the supply conveyor belt 223 inevitably decreases. Therefore, when a structure is used in which the supply drive source 221 rotates the supply roller 222 to rotate the supply conveyor belt 223, the rotation speed of the supply conveyor belt 223 may not meet the required speed. Therefore, the drive structure for rotating the supply conveyor belt 223 using the supply drive source 221 in this application is preferably as follows. That is, as shown in FIGS. 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 left and right ends of the transmission roller 26 are rotatably supported by the base guard plate 212 of the input / output frame 21. The transmission roller 26 has an unusual outer diameter. The diameter of the transmission roller 26 is larger than that of the supply roller 222. Preferably, the diameter of the transmission roller 26 is three to five times the diameter of the supply roller 222. The transmission roller 26 contacts the inner circumferential surface of the supply conveyor belt 223 and is located below the pair of supply rollers 222. In this manner, 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 of the large contact area and large frictional force between the transmission roller 26 and the supply conveyor belt 223, the transmission roller 26 can rotate the supply conveyor belt 223. This improves the reliability of the rotational movement of the supply conveyor belt 223, ensuring accurate forward transport of the sorted objects, while also ensuring that the rotational speed of the supply conveyor belt 223 meets design requirements.

[0148] 17 and 19, a motor mounting area 28 is formed on the outer periphery 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 / output frame 21. This makes it easier to mount the supply drive source 221, makes the entire structure more compact, and reduces the space occupied by the entire input / output device 20.

[0149] 17 to 19, each input belt conveying mechanism 22 further includes a tension adjustment roller 29 and a tension adjustment assembly. The tension adjustment roller 29 is disposed in the motor mounting area 28. The tension adjustment roller 29 and the transmission roller 26 are parallel to each other. The tension adjustment roller 29 includes a roller axle 291 and a tension drum 292 rotatably attached to the roller axle 291. The tension drum 292 contacts the outer circumferential surface of the supply conveyor belt 223. The roller axle 291 is attached to the input supply frame 21 via the tension adjustment assembly so as to be movable back and forth. Thus, by adjusting the front-rear position of the roller axle 291 using the tension adjustment assembly, the front-rear position of the tension adjustment roller 29 is adjusted, thereby adjusting the tension of the supply conveyor 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 input / output frame 21, an adjustment groove 2171 opened in the input / output frame 21 and extending forward and backward, an adjustment bolt extending forward and backward, and a lock nut connected to the adjustment bolt. The adjustment bolt and lock nut are not shown. The roller axle 291 is inserted into the adjustment groove 2171 so as to be movable forward and backward. The adjustment bolt is inserted into the roller axle 291 and the adjustment base 217. The lock nut abuts against the outer periphery of the roller axle 291.

[0150] 17 and 19, at least one position restricting rib 2231 extending in the circumferential direction is provided on the outer peripheral surface of the supply conveyor belt 223. When there are multiple position restricting ribs 2231, the multiple position restricting ribs 2231 are aligned left and right along a direction perpendicular to the conveying direction of the input belt conveyor mechanism 22. The position restricting rib 2231 restricts the left and right positions of the objects to be sorted conveyed forward on the supply conveyor belt 223, thereby improving the conveyance accuracy of the objects to be sorted forward. The number of position restricting ribs 2231 on each supply conveyor belt 223 is determined according to actual needs. In this embodiment, there are two position restricting ribs 2231, one on the left and one on the right.

[0151] Furthermore, as shown in FIG. 16, the input supply frame 21 is provided with a plurality of conveyor assembly mounting areas 216. The plurality of conveyor assembly mounting areas 216 are lined up on the left and right in a direction perpendicular to the conveying direction of the input belt conveying mechanism 22. Each conveyor assembly mounting area 216 has a plurality of input belt conveying mechanisms 22 mounted thereon. In the embodiment shown in FIG. 16, the input supply frame 21 has two conveyor assembly mounting areas 216, one on the left and one on the right. Furthermore, each conveyor assembly mounting area 216 has two input belt conveying mechanisms 22 mounted thereon. This arrangement can improve the supply efficiency of the objects to be sorted, and ultimately improve the sorting efficiency of the sorting system.

[0152] Furthermore, as shown in FIG. 20 , in the conveying direction in which the input belt conveying mechanisms 22 convey the objects forward, the multiple input belt conveying mechanisms 22 are arranged in a stepped pattern from rear to front and from high to low. That is, the input belt conveying mechanisms 22 arranged at the rear are higher than the input belt conveying mechanisms 22 arranged at the front. 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 more effectively reduced. This further reduces the approximately triangular area 218, thereby more effectively preventing objects from falling. Furthermore, using multiple input belt conveying mechanisms 22 at the front and rear prevents a recess from forming in the center of the supply conveyor belt 223. This prevents light objects from bouncing up on the supply conveyor belt 223 and ensures reliable supply.

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

[0154] (Example 1 of sorting cart 30) As shown in FIG. 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-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 the single-cart, two-cart, and four-cart central feed sorting systems of Example 1, the cart frame 31 is attached to the parallel-moving frame 63 so as to be vertically movable and is fixedly connected to the second timing belt 673. In the central feed sorting systems of Examples 2 and 3, the cart frame 31 of the horizontally moving 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 sorted items from the input / output device 20 as follows: The sorting cart 30 moves to below the front end of the input / output device 20. Next, as the multiple input belt conveying mechanisms 22 convey the objects to be sorted forward, the objects drop from the front ends of the input belt conveying mechanisms 22. Then, they are dropped onto the sorting cart 30 below, thereby completing the reception of the objects to be sorted.

[0155] As shown in FIGS. 21 and 22 , the transfer belt transport mechanism includes a transport drive source, a pair of sorting rollers 32 rotatably attached to the front and rear ends of a carriage frame 31, and a sorting conveyor belt 33 connected to the two front and rear sorting rollers 32. The sorting rollers 32 are driven to rotate by a transport drive source (e.g., a motor). Alternatively, an electric roller is used for the sorting roller 32. This allows the sorting conveyor belt 33 to move forward and backward, so that the objects on the sorting conveyor belt 33 are transported forward to the drop slide tank 41 in front of the fixed frame 10, or the objects on the sorting conveyor belt 33 are transported backward to the drop slide tank 41 in the rear of the fixed frame 10.

[0156] Preferably, as shown in FIGS. 21 and 22 , the sorting cart 30 further includes a pair of lateral position restriction stoppers 34. The pair of lateral position restriction stoppers 34 is fixed to the cart frame 31. The pair of lateral position restriction stoppers 34 is 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 restriction stoppers 34 have a shielding plate structure. The sorting conveyor belt 33 is also provided with at least two shielding bars 35. Each shielding bar 35 extends to the left and right. The multiple shielding bars 35 are provided at intervals in the rotation direction (i.e., the conveying direction) of the sorting conveyor belt 33. The structure of the lateral position restriction stoppers 34 and the shielding bars 35 reliably ensures that the objects to be sorted do not unexpectedly fall off the sorting conveyor belt 33. The specific cross-sectional shape of the shielding bars 35 is not limited, and may be linear, plate-like, block-like, rod-like, irregular, or the like. The provision of the blocking bar 35 provides the following two functions.

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

[0158] 2. When the objects to be sorted have special shapes such as spheres or hemispheres, the blocking bar 35 acts to brake and restrict the position of the objects. This makes it difficult for the objects with special shapes to move around uncontrollably on the sorting conveyor belt 33, ensuring transport accuracy.

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

[0160] 1. The detection assembly consists of a metal tip and a proximity switch. The metal tip is fixed to the left or right side of one of the multiple blocking bars 35. The proximity switches are fixed to the cart frame 31 and are located on the same side as the blocking bars 35. The proximity switches can detect the metal tip. In the initial state of the sorting cart 30, the proximity switch can detect the metal tip, which triggers the proximity switch. When the sorting cart 30 receives the objects and moves to the corresponding drop slide tank 41, the proximity switch is in a triggered state. The conveyor drive source then operates to rotate the sorting conveyor belt 33, thereby lowering the objects. During this process, the metal tip moves away from the proximity switch and gradually approaches the proximity switch again. When the proximity switch switches from triggered to non-triggered and then back to triggered, it indicates that the objects have been lowered. The conveyor drive source then performs a reverse rotation operation, causing the sorting conveyor belt 33 to rotate in the reverse direction. Then, the metal tip moves away from the proximity switch again and gradually approaches the proximity switch. As a result, the state of the proximity switch changes from trigger to non-trigger, and then back to trigger. At this time, the conveyor drive source stops operating and the sorting conveyor 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 cart frame 31 and are arranged so as to face each other in the vertical direction. One of the photoelectric sensor and the light reflector is arranged between the upper and lower ends of the sorting conveyor belt 33, and the other is arranged below the sorting conveyor belt 33. This allows the sorting conveyor belt 33 to pass between the photoelectric sensor and the light reflector. The sorting conveyor belt 33 also has a light-transmitting hole. As the sorting conveyor belt 33 rotates, the light-transmitting hole can move to a position facing the light reflector. In the initial state of the sorting cart 30, the light-transmitting hole faces the light reflector, and the light beam is not blocked. This triggers the photoelectric sensor. When the sorting cart 30 receives an object and moves to the corresponding drop slide tank 41, the proximity switch is triggered. The conveyance drive source then operates to rotate the sorting conveyor belt 33, thereby lowering the objects to be sorted. During this process, the light-transmitting holes move away from the light reflecting plate, and then move closer to the light reflecting plate again. This causes the state of the photoelectric sensor to switch from trigger to non-trigger, and when it switches back to trigger, it indicates that the objects have been lowered. The conveyance drive source then performs a reverse rotation operation, thereby rotating the sorting conveyor belt 33 in the reverse direction. This causes the light-transmitting holes to move away from the light reflecting plate, and then move closer to the light reflecting plate again. This causes the state of the photoelectric sensor to switch from trigger to non-trigger, and then switch back to trigger. At this time, the conveyance drive source stops operating, and the sorting conveyor belt 33 is reset.

[0162] (Example 2 of sorting cart 30) As shown in FIG. 23 , the sorting cart 30 of the second embodiment is based on the sorting cart 30 of the first embodiment, and further includes a pair of main position regulation stoppers 36. The pair of main position regulation stoppers 36 are located 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 regulation stoppers 36 are attached to the cart frame 31. The pair of side position regulation 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, entrances are formed between the pair of side position regulation stoppers 34 and the sorting conveyor belt 33. Of these, the front entrance is defined as a first opening 331, and the rear entrance is defined as a second opening 332. Both the first opening 331 and the second opening 332 allow the passage of sorted items. The pair of main position regulation stoppers 36 are provided at the first opening 331 and the second opening 332, respectively. The front main position regulation stopper 36 can close or open the first opening 331 by moving toward or away from the first opening 331. The rear main position regulation stopper 36 can close or open the second opening 332 by moving toward or away from the second opening 332. In this way, while the sorting cart 30 is transporting the items to be sorted, the pair of main position regulation stoppers 36 close the first opening 331 and the second opening 332. As a result, the pair of main position regulation stoppers 36 block the forward and backward movement of the items to be sorted, preventing the items from falling downward from the first opening 331 or the second opening 332, thereby achieving a fall prevention effect.

[0163] Preferably, the main position control stopper 36 has multiple movement modes, such as vertical lifting, vertical rotation, and front-to-back rotation. The main position control stopper 36 may be a single blocking plate or two blocking plates (left and right). In the embodiment shown in FIG. 23 , each main position control stopper 36 includes two position control gates 361 (left and right). The sorting cart 30 further includes a stopper drive source 37 connected to each position control gate 361 for transmission. The stopper drive source 37 is fixed to the cart frame 31. The stopper drive source 37 may be a gas cylinder, a motor, an electromagnet, or the like, and moves the connected position control gate 361 up and down, rotates up and down, or rotates back and forth. When the stopper drive source 37 moves the position control gate 361 until the first opening 331 or the second opening 332 is opened, the objects to be sorted can enter or be carried out from the sorting cart 30. Furthermore, when the stopper drive source 37 moves the position control gate 361 until the first opening 331 or the second opening 332 is closed, the objects to be sorted on the sorting cart 30 are prevented from falling, thereby achieving a fall prevention function. In the embodiment shown in Figure 23, the movement method of the position control gate 361 is rotational.

[0164] Additionally, in the sorting cart 30 of the second embodiment, the sorting conveyor belt 33 may be provided with the blocking bar 35 of the sorting cart 30 of the first embodiment. Also, as shown in FIG. 23, the sorting conveyor belt 33 does not have to be provided with the blocking bar 35. When the sorting conveyor belt 33 is provided with the blocking bar 35, the blocking bar 35 may be regarded as a main position regulating stopper 36 fixed to the sorting conveyor belt 33.

[0165] (Example 3 of sorting cart 30) The sorting cart 30 of the third embodiment differs from the sorting cart 30 of the second embodiment in the specific structure of the main position regulating stoppers 36. In the sorting cart 30 of the third embodiment shown in FIG. 24, as shown in FIGS. 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 regulating stoppers 36 has a single blocking plate structure. The pair of main position regulating stoppers 36 are attached to the cart frame 31 so as to be able to lift and lower. The stopper lifting drive source is connected to the pair of main position regulating stoppers 36 via the stopper lifting transmission unit so as to transmit power thereto, and raises and lowers the pair of main position regulating stoppers 36 synchronously. When the sorting cart 30 moves to the input supply device 20 to receive the objects, and when the sorting cart 30 moves to the drop slide tank 41 to unload the objects, the stopper lifting drive source simultaneously and synchronously moves the two front and rear main position regulation stoppers 36 upward via the stopper lifting transmission unit, thereby separating the main position regulation stoppers 36 from the entrance / exit. As a result, the main position regulation stoppers 36 no longer perform their blocking function, and the objects are carried onto the sorting conveyor belt 33 through the entrance / exit, or are carried out from the sorting conveyor belt 33 through the entrance / exit. Meanwhile, during the movement of the sorting cart 30 with the objects placed on it, the stopper lifting drive source simultaneously and synchronously moves the two front and rear main position regulation stoppers 36 downward via the stopper lifting transmission unit until they abut against the outside of the entrance / exit. As a result, the main position control stoppers 36 perform a blocking function, preventing objects on the sorting conveyor belt 33 from falling through the entrance / exit, thereby providing a good fall prevention function. In this application, the two main position control stoppers 36 are raised and lowered simultaneously and synchronously using a single stopper raising / lowering drive source, thereby achieving the goal of cost reduction. Furthermore, in this application, the main position control stoppers 36 move in an up-and-down manner, i.e., in an up-and-down direction. In this case, the requirement for space above the main position control stoppers 36 is lower than in a movement method in which the stoppers rotate up and down, so the sorting cart 30 can be more easily installed in a central supply sorting system.

[0166] 24, 27, and 28, a conveyance drive source 313 that rotates the sorting conveyor belt 33 of the sorting cart 30 is fixed to the outer periphery of the left-side lateral position regulating stopper 34. The conveyance drive source 313 is connected to transmit power to the pair of sorting rollers 32 via a conveyance transmission assembly. The conveyance transmission assembly may be a timing belt and pulley assembly.

[0167] 24 and 27, the stopper lifting drive source is a motor. The stopper lifting transmission unit includes a first transmission assembly 38 connected to transmit power to the motor shaft of the stopper lifting drive source, and a second transmission assembly 39 connected to transmit power to each of the main position limiting stoppers 36. Both second transmission assemblies 39 are connected to transmit power to the first transmission assembly 38. The first transmission assembly 38 may be a rack and pinion assembly, a sprocket and chain assembly, or a timing belt and pulley assembly. The second transmission assembly 39 may be a screw and 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 located on the outer periphery of the right-side lateral position limiting stopper 34. The second transmission assembly 39 includes a transmission rotation shaft 391 rotatably supported on the carriage frame 31. The first transmission assembly 38 also includes a fourth driving pulley 381 fixed to the motor shaft of the stopper lifting / lowering 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 periphery of the fourth driving 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, thereby achieving synchronous upward or downward movement of the two front and rear main position restriction stoppers 36.

[0169] As shown in FIGS. 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 carriage frame 31 by the tension adjustment bolt. The tension adjustment groove 385 is an elliptical groove extending horizontally in the left and right directions. This allows the left and right position of the motor mounting frame 384 to be adjusted after loosening the tension adjustment bolt. That is, the tension of the third timing belt 383 can be adjusted 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 idle gears 386 rotatably attached to the carriage frame 31. The two idle gears 386 are distributed on both the front and rear sides of the fourth drive pulley 381, and both abut on the outer side of the third timing belt 383. By providing the idle gears 386, the two left and right portions of the third timing belt 383 extending in the front-rear direction can be made parallel to each other.

[0170] As shown in FIGS. 24, 26, and 28, each second transmission assembly 39 preferably includes two feed screws 392 located on both the left and right ends of the main position limiting stopper 36, feed nuts 393 connected to the feed screws 392, fifth driven pulleys 394 fixed to the lower ends of the feed screws 392, and a fourth timing belt 395. Both of the two feed screws 392 are vertically disposed and rotatably attached to the carriage frame 31 via bearing housings. The right feed screw 392 closer to the first transmission assembly 38 constitutes the transmission rotation shaft 391. Therefore, the right feed screw 392 is connected to the first transmission assembly 38. That is, the fourth driven pulley 382 is fixed to the upper ends of both right feed screws 392. The fourth timing belt 395 is connected to the outer peripheries of the two fifth driven pulleys 394, one on each side, of the second transmission assembly 39. Furthermore, the feed nut 393 is connected to the main position restriction stopper 36. In this manner, the stopper lifting drive source simultaneously and synchronously rotates the right feed screws 392 in the two front and rear second transmission assemblies 39 via the first transmission assembly 38. The right feed screw 392 simultaneously and synchronously rotates the left feed screw 392 via the fifth driven pulley 394 and the fourth timing belt 395. This then causes the two front and rear main position restriction stoppers 36 to move upward or downward synchronously via the feed nut 393.

[0171] 26, a fitting gap 396 is provided between the feed nut 393 and the main position limiting 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 limiting stopper 36 via a thrust bearing. The provision of the thrust bearing and the fitting gap 396 allows the main position limiting stopper 36 to have a certain amount of front-rear movement relative to the feed nut 393. This eliminates misalignment, and thus prevents the occurrence of a stuck phenomenon, provided that synchronization is guaranteed.

[0172] Additionally, a preferred embodiment of the drop mechanism 40 for use in several embodiments of the central feed sorting system described above will now be described.

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

[0174] During sorting, the sorting cart 30 first moves to the input / output device 20 and receives the objects supplied from the input / output device 20. The sorting cart 30 then moves to a predetermined position on the slide tank bottom plate 42 while holding the objects. The sorting cart 30 then lowers the objects, which then pass through the slide tank bottom plate 42 and drop into the receiving device 50, completing the dropping process. To prevent the objects from falling into the gap between the sorting cart 30 and the slide tank bottom plate 42 and ensure smooth dropping, a flexible stopper 43 is provided on the first side edge 4211 of the slide tank bottom plate 42, as shown in FIG. 29 . The flexible stopper 43 contributes to reducing the gap between the sorting cart 30 and the slide tank bottom plate 42, preventing the objects from falling. Furthermore, the flexible stopper 43 automatically and elastically returns to its original position upon impact with the sorting cart 30, making it less susceptible to damage. Specifically, the flexible stopper 43 is made of a flexible material with excellent resilience, such as silicone or rubber. Furthermore, lighter items on the sorting cart 30 are more likely to fall than heavier items. When a light item falls from the sorting cart 30, it falls onto the flexible stopper 43. The flexible stopper 43 itself has a certain carrying capacity, and the carrying performance of the flexible stopper 43 also ensures that the items can enter the slide tank bottom plate 42, ensuring smooth completion of the dropping.

[0175] Furthermore, when the sorting cart 30 attempts to lower the objects placed on it onto the slide tank bottom plate 42, the height of the sorting cart 30 is higher than the height of the first side edge 4211, so there is a difference in height between the sorting cart 30 and the slide tank bottom plate 42. This difference in height makes it possible for the objects to move parabolic when they leave the sorting cart 30, greatly improving the possibility of dropping the objects onto the slide tank bottom plate 42.

[0176] Furthermore, the type of flexible stopper 43 is not limited, and may include several flexible pads provided along the first side 4211. Also, as shown in FIGS. 29 to 31, flexible stopper 43 may include a plurality of flexible strips 431. The plurality of flexible strips 431 are provided on the first side 4211 at intervals on the left and right. Compared to a single flexible pad, the plurality of flexible strips 431 can reduce the resistance force that the sorting cart 30 receives during movement, and also reduce wear on the flexible strips 431 themselves, resulting in a longer overall service life than a flexible pad.

[0177] In the embodiment using the above-described multiple flexible strips 431, as shown in FIGS. 30 to 35, the slide tank bottom plate 42 includes a main plate body 421 and a bent portion 422 connected to form an L-shape. The main plate body 421 includes the above-described first side edge 4211 and second side edge 4212. The extension direction of these is parallel to the longitudinal direction of the main plate body 421. The first side edge 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 opened at intervals in the extension direction of the first side edge 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 pairs of insertion holes spaced apart in the longitudinal direction of the first plate body 461. The longitudinal direction of the first plate body 461 is parallel to the extension direction of the first side edge 4211. Each pair of insertion holes includes a first insertion hole 4611 and a second insertion hole 4612 spaced apart in the width direction of the first plate body 461. As shown in FIGS. 29 to 31 and 36, one end of the flexible strip 431 is inserted sequentially through the through hole 423, the second insertion hole 4612, and the first insertion hole 4611 to form a U-shaped portion 432. The second plate body 462 is detachably connected to the bent portion 422. This arrangement prevents the flexible strip 431 from falling off the slide tank bottom plate 42 during use, making the mounting structure more solid and stable.

[0178] Furthermore, as shown in Figures 31, 32, 34, and 35, a connection hole 4621 is formed in the second plate body 462, and a fastening elongated hole 4221 is formed in the bent portion 422. The fastening elongated hole 4221 extends along the width direction of the bent portion 422. The inner diameter of the connection hole 4621 is smaller than the length of the fastening elongated hole 4221. The connection hole 4621 and the fastening elongated hole 4221 are connected by a fastening member. Specifically, the fastening member is a bolt. The distance between the first plate body 461 and the main plate body 421 can be changed by adjusting the position of the fastening member in the fastening elongated hole 4221, which is convenient for fixing flexible strips 431 of different sizes to the slide tank bottom plate 42. Furthermore, as shown in Figure 30, a plurality 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 edge 4211. By providing it in this manner, the structural strength of the main plate body 421 can be strengthened, which contributes to supporting sorted objects of different weights.

[0179] In summary, the present application uses a central supply structure to shorten the distance that the sorting cart 30 moves in the longitudinal direction of the fixed frame 10 during one sorting run, thereby reducing the time required for one sorting run, thereby improving sorting efficiency.

[0180] The above-described embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Those skilled in the art can supplement or modify the above-described embodiments without departing from the spirit and scope of the present invention. Therefore, any equivalent supplements or modifications that those skilled in the art can make without departing from the spirit and technical ideas disclosed in the present invention should still fall within the scope of the claims of the present invention.

Claims

1. A central supply and sorting system comprising a fixedly mounted stationary frame (10) and an input / output device (20), at least one sorting cart (30) movably mounted on the stationary frame (10), a plurality of drop slide tanks (41) mounted on the stationary frame (10), and a receiving device (50) disposed on the outer periphery of the stationary frame (10), wherein the sorting cart (30) is reciprocable between the input / output device (20) and the drop slide tank (41), and the receiving device (50) has a plurality of receiving frames (51) corresponding one-to-one to 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 in the input supply station (101) of the fixed frame (10); A central supply sorting system characterized in that the drop slide tank (41) and the receiving device (50) are mounted on the fixed frame (10) on different sides of the input supply device (20).

2. 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 both the input supply station (101) and the input supply device (20) are installed at the center of the fixed frame (10) in the extension direction of the fixed frame (10); The central supply sorting system of claim 1, characterized in that the central supply sorting system is provided with sorting subsystems 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 part of the fixed frame (10), the drop slide tank (41), and the receiving device (50).

3. 3. The central supply sorting system according to claim 2, characterized in that the central supply sorting system has a single carriage structure, one sorting carriage (30) is arranged, and the one sorting carriage (30) is movable within 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 2, characterized in that the central supply sorting system has a two-cart structure, two sorting carts (30) are arranged, and both of the sorting carts (30) are movable within areas on both sides of the input / output station (101) in the extension direction of the fixed frame (10).

5. The central supply and sorting system according to claim 2, characterized in that the central supply and sorting system has a four-carriage structure, and four sorting carts (30) are arranged, two of which are arranged within an area located on one side of the input and supply station (101) in the extension direction of the fixed frame (10) and are movable within said area, and the remaining two sorting carts (30) are arranged within an area located on the other side of the input and supply station (101) in the extension direction of the fixed frame (10) and are movable within said area.

6. Each of the sorting carriages (30) is movably attached to the stationary frame (10) by a sorting transmission mechanism (60); Each of the sorting transmission mechanisms (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) combined 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), and the parallel movement guide rail (61) extends vertically in the extension direction of the fixed frame (10), and both ends extend to both ends of the fixed frame (10), and the vertical movement guide rail (65) 6. The central supply sorting system according to claim 3, wherein the system extends vertically in the height direction of the fixed frame (10), the parallel movement drive source (62) is connected to the parallel movement frame (63) so as to transmit power thereto, the sorting cart (30) is combined with the vertical movement guide rail (65) so as to slide thereon, the vertical movement drive source (64) is connected to the sorting cart (30) so as to transmit power thereto, and the input / output stations (101) are distributed on a movement path along which the parallel movement frame (63) slides along the parallel movement guide rail (61).

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

8. 8. The central supply and sorting system according to claim 7, wherein when the central supply and sorting system has a four-carriage structure, four parallel movement frames (63) are arranged, two of the parallel movement frames (63) are distributed on both sides of the input and supply station (101) in the extension 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 parallel movement frames (63) are distributed on both sides of the input and supply station (101) in the extension 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 two first timing belt transmission assemblies (66) connected to the two parallel movement frames (63) sharing the same parallel movement guide rail (61) are offset in the width direction of the fixed frame (10).

9. 2. The central supply sorting system according to claim 1, wherein the fixed frame (10) has a bend on its extension path, and the input / output station (101) and the input / output device (20) are both located at the bend of the fixed frame (10) in the extension direction of the fixed frame (10).

10. The central supply and sorting system of claim 9, wherein the fixed frame (10) is L-shaped, and a sorting subsystem is provided on the side of the fixed frame (10) facing the input supply device (20) in the input direction of the input supply device (20), and a sorting subsystem is provided on the fixed frame (10) on one side in a direction perpendicular to the input direction of the input supply device (20), and each sorting subsystem includes a part of the fixed frame (10), the drop slide tank (41), and the receiving device (50).

11. The central supply sorting system of claim 9, wherein the fixed frame (10) is T-shaped, and a sorting subsystem is provided on the side of the fixed frame (10) facing the input supply device (20) in the input direction of the input supply device (20), and a sorting subsystem is provided on the fixed frame (10) on both sides in a direction perpendicular to the input direction of the input supply device (20), and each sorting subsystem includes a part of the fixed frame (10), the drop slide tank (41), and the receiving device (50).

12. In each of the sorting subsystems, a drop mechanism (40) is provided on both sides of the fixed frame (10) in a direction perpendicular to the extension direction thereof, and a cart movement area (102) is formed between the two drop mechanisms (40) to allow movement of the sorting cart (30); Each of the 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 extension 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 any one of claims 2 and 9 to 11, characterized in that a flexible stopper (43) extending toward the cart movement area (102) is fixed to an inner edge of each slide tank bottom plate (42) that is close to the cart movement area (102).

13. 13. The central supply sorting system according to claim 12, wherein the flexible stopper (43) comprises a plurality of flexible strips (431) aligned in the extension direction of the fixed frame (10).

14. 2. The central supply sorting system according to claim 1, wherein the input supply device (20) includes a fixed input supply frame (21) and a plurality of input belt conveying mechanisms (22) attached to the input supply frame (21), each of the input belt conveying mechanisms (22) including 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) being connected in sequence in the conveying direction, and the supply drive sources of the plurality of input belt conveying mechanisms (22) being independent of each other.

15. 15. The central supply sorting system according to claim 14, wherein the plurality of input belt conveying mechanisms (22) are distributed in a stepped manner from a high place to a low place in the conveying direction of the input belt conveying mechanism (22).

16. The central supply sorting system described in claim 14, characterized in that 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) has a detection opening (213) that allows the grating sensor (23) to be exposed.

17. 15. The central supply sorting system according to claim 14, wherein an approximately triangular area (218) is formed between two adjacent input belt conveying mechanisms (22), and the supply rollers (222) are small diameter rollers having a diameter of 40 mm or less.

18. 2. The central supply sorting system of claim 1, wherein the sorting cart (30) includes a cart frame (31) 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 blocking bars (35) fixed to the outer surface of the sorting conveying belt (33) aligned in the longitudinal direction of the sorting conveying belt (33).

19. 19. The central supply sorting system according to claim 18, wherein the sorting cart (30) further includes a metal tip fixed to the edge side of one of the blocking bars (35) and a proximity switch fixed to the cart frame (31), the proximity switch being capable of detecting the metal tip.

20. The central supply sorting system of claim 18, 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 arranged facing each other in the vertical direction, the sorting conveyor belt (33) passes between the photoelectric sensor and the light reflector and has a light-transmitting hole opened therein, and the light-transmitting hole can be moved to a position facing the light reflector.

21. The central supply sorting system of claim 18, characterized in that the sorting cart (30) further includes a pair of lateral position control stops (34) attached to the cart frame (31) and a pair of main position control stops (36) attached to the cart frame (31), a first opening (331) and a second opening (332) are formed between the sorting conveying belt (33) and the pair of lateral position control stops (34), the first opening (331) and the second opening (332) are distributed on both ends of the sorting conveying belt (33) in the conveying direction of the sorting conveying belt (33), and the main position control stops (36) are movably attached to the cart frame (31) to close or open the first opening (331) and the second opening (332).

22. The central supply sorting system described in claim 21, characterized in that each of the main position control stops (36) includes two position control gates (361) rotatably attached to the cart frame (31), and a stopper drive source (37) connected to each of the position control gates (361) is provided at the portion of the sorting cart (30) where each of the position control gates (361) is located, and the stopper drive source (37) is fixed to the cart frame (31).

23. The central supply sorting system described in claim 21, characterized in that 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 the main position control stoppers (36) are attached to the cart frame (31) so as to be able to be raised and lowered, and the stopper lifting drive source is connected to transmit power to the pair of main position control stoppers (36) via the stopper lifting transmission unit, thereby synchronously raising and lowering the pair of main position control stoppers (36).

24. 1. A central feed sorting method comprising: Using the central supply and sorting system according to any one of claims 1 to 5, 9 to 11 and 14 to 23, Step S1: placing a plurality of objects to be sorted on the input / output device (20) in order, and the input / output device (20) transporting the objects to the fixed frame (10); Step S2 in which the sorting cart (30) moves to the input supply device (20); Step S3 in which the sorting cart (30) receives the objects to be sorted carried out from the input / output device (20); Step S4: the sorting cart (30) moves to a drop slide tank (41) corresponding to the object to be sorted on the sorting cart (30); Step S5: when the sorting cart (30) unloads the objects, the objects are dropped through the drop slide tank (41) onto the receiving frame (51) corresponding to the drop slide tank (41); Step S6: the sorting cart (30) moves and returns to the input supply device (20); Step S7: repeating steps S3 to S6; Including, A central feed sorting method characterized in that in step S4, which is executed multiple times, the sorting cart (30) is capable of moving toward drop slide tanks (41) distributed on different sides of the input supply device (20).

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