CN111634655A

CN111634655A - Tray resetting mechanism of turnover type sorting trolley, sorting machine and sorting method

Info

Publication number: CN111634655A
Application number: CN202010554272.1A
Authority: CN
Inventors: 许辉平; 杨永栓; 朱明超; 徐美金; 孙高; 鞠世林
Original assignee: Hangzhou Confirmware Technology Co ltd
Current assignee: Hangzhou Confirmware Technology Co ltd
Priority date: 2020-06-17
Filing date: 2020-06-17
Publication date: 2020-09-08

Abstract

The invention discloses a tray resetting mechanism of a turnover type sorting trolley, a sorting machine and a sorting method. The tray resetting mechanism and the sorting trolley can be greatly impacted when the existing plate-turning type sorting machine is reset, so that the service life of the plate-turning type sorting machine is greatly shortened. The invention relates to a tray resetting mechanism of a turnover plate type sorting trolley, which comprises a base, an inclined guide part and an elastic connecting part. The inclined guide member is installed at the base through an elastic connection member. In the initial state, the top surface of the inclined guide piece is obliquely arranged and used for guiding the tray of the sorting trolley to reset. When the inclined guide piece is impacted by the outside, the elastic connecting piece is stressed to deform, and the inclined guide piece displaces along with the deformation to realize buffering. When the tray of the turnover plate type sorting trolley is reset, all the hydraulic springs can deform to buffer, so that the damage to the sorting trolley and the tray resetting mechanism caused by rigid impact is avoided.

Description

Tray resetting mechanism of turnover type sorting trolley, sorting machine and sorting method

Technical Field

The invention belongs to the technical field of logistics sorting, and particularly relates to a tray resetting mechanism of a flap-type unpowered sorting trolley, a sorting machine and a sorting method.

Background

The tray is used as a sorting carrier of the turnover plate type sorting machine, goods are released by downwards turning the tray, and the turnover plate type sorting machine has the core advantage that the turnover plate type sorting machine can stably and reliably process articles with various sizes and shapes, such as plastic bags, irregular packaged special-shaped pieces, mails, books and periodicals and the like. And the lower package platform of the plate turnover type sorting machine is arranged below the annular track, and a power source is not required to be arranged on the sorting trolley, so that the plate turnover type sorting machine has the advantages of small occupied space and low cost. However, in the existing flap sorter, the tray reset mechanism resets the tray by rigidly impacting the tray that is flipped open downward by the sorting trolley. In the reset process, the tray reset mechanism and the sorting trolley can be greatly impacted, so that the service life of the plate turnover type sorting machine is greatly shortened. In addition, when the condition of card package appears on the letter sorting dolly, current tray canceling release mechanical system can push away the letter sorting dolly rather, leads to serious consequences such as letter sorting dolly derailment, damage.

Disclosure of Invention

The invention aims to provide a tray resetting mechanism of a turnover type sorting trolley, a sorting machine and a sorting method.

The invention aims to provide a tray resetting mechanism of a turnover plate type sorting trolley.

The invention relates to a tray resetting mechanism of a turnover plate type sorting trolley, which comprises a base, an inclined guide part and an elastic connecting part. The inclined guide member is installed at the base through an elastic connection member. In the initial state, the top surface of the inclined guide piece is obliquely arranged and used for guiding the tray of the sorting trolley to reset. When the inclined guide piece is impacted by the outside, the elastic connecting piece is stressed to deform, and the inclined guide piece displaces along with the deformation to realize buffering.

Preferably, the base is provided with a first supporting seat and a second supporting seat of the inclined guide piece for installation. The first supporting seat and the second supporting seat are arranged at intervals and are fixed on the base. The direction from the first supporting seat to the second supporting seat is the same as the conveying direction of the sorting machine. The first supporting seat is lower than the second supporting seat. First supporting seat and second supporting seat all include spacing post in top and two blocks of curb plates. The top limiting column is fixed between the two side plates.

Preferably, the inclined guide part is in a strip shape and penetrates through the lower parts of the limiting columns in the first supporting seat and the second supporting seat. The inclined guide part is propped against the limiting column under the action of the elastic connecting part.

Preferably, one end of the plurality of elastic connection members is hinged to the base, and the other end is hinged to the tilt guide member, so that the tilt guide member maintains a stable tilted state when it is not subjected to an external impact.

Preferably, the connection position of each elastic connecting piece and the base is adjustable.

Preferably, the connection position of each elastic connection member to the tilt guide member is adjustable.

Preferably, the elastic connecting piece adopts a hydraulic spring, a gas spring or a metal spring.

Preferably, the tray resetting mechanism of the turnover plate type sorting trolley further comprises a guide buffer layer. The guide buffer layer is arranged on the top surface of the inclined guide piece.

The second purpose of the invention is to provide another tray resetting mechanism of the turnover plate type sorting trolley.

The invention relates to a tray resetting mechanism of a turnover plate type sorting trolley, which comprises a base, an inclined guide piece and a guide buffer layer. The inclined guide piece is installed on the base, the top surface of the inclined guide piece is obliquely arranged, and the inclined guide piece is used for guiding the tray of the sorting trolley to reset. The guide buffer layer is arranged on the top surface of the inclined guide piece.

Preferably, the guide buffer layer adopts a brush with upward bristles.

Preferably, the guide buffer layer is made of strip-shaped elastic material.

Preferably, the guide buffer layer comprises a guide plate and a plurality of springs. The guide plate is connected to the top surface of the inclined guide by a plurality of springs.

The invention also provides a plate-turning type sorting machine applying the tray resetting mechanism and a sorting method thereof.

The invention relates to a plate-turning type sorting machine which comprises a rack, an annular track, a sorting trolley, a lower packing table and one of the tray resetting mechanisms. The annular track is installed on the frame. A plurality of sorting trolleys are sequentially arranged on the annular track end to end. The sorting trolley is provided with a tray locked by a lock catch. When the latch is toggled, the tray is flipped open downward. The lower ladle table is arranged right below the annular track. The tray resetting mechanism is arranged below the annular track and is positioned at the tail end of the lower packing table. The number of the tray resetting mechanisms corresponds to the number of the trays on a single sorting trolley. The top surface of the inclined guide piece in the tray resetting mechanism is gradually raised from low along the conveying direction of the sorting trolley. The lower packing platform consists of a plurality of lower packing units which are sequentially arranged along the conveying direction of the sorting trolley. And a power element for shifting the lock catch on the sorting trolley is arranged in the lower packing unit.

Preferably, the power element for shifting the lock catch in the lower bag unit adopts a lock catch shifting cylinder. The lock catch poking cylinder is arranged on the side part of the annular track, and the position of the lock catch poking cylinder corresponds to the outer end of the lock catch on the sorting trolley. The top end of a piston rod of the lock catch toggle cylinder is supported with a second roller. When the second roller wheel is positioned at the first limit position, the second roller wheel is staggered with the outer end of the lock catch, and the lock catch cannot be pulled by the sorting trolley when the sorting trolley passes through; when the second roller wheel is positioned at the second limit position, the second roller wheel is aligned with the outer end of the lock catch, and the lock catch is stirred when the sorting trolley passes through, so that the tray on the corresponding side of the sorting trolley is downwards turned.

Preferably, one side edge of the tray on the sorting trolley is hinged with the frame. And under the state that the tray is not turned downwards, the hinge shaft on the tray is positioned on one side of the tray close to the conveying direction. A first roller is supported at one side edge of the tray. The lock catch is arranged at the bottom of the frame and corresponds to the first roller in position. The lock catch and the frame form a revolute pair and are elastically connected. The lock catch resets under the action of elastic force after being stirred. The inner end of the lock catch is fixed with a limiting block. The top surface of stopper is the plane, supports first gyro wheel for the tray is locked. The bottom surface of stopper is the inclined plane for first gyro wheel can push away the stopper when the tray upwards overturns and resets, realizes that the tray resets and the locking.

Preferably, the sorting trolley comprises a frame, supporting wheels, positioning wheels, a tray, a lock catch and a secondary plate. A plurality of supporting wheels which are vertically arranged are arranged at the bottom of the frame. The horizontally arranged positioning wheels are supported at the side part of the frame. The secondary plate is fixed on one side of the frame. The two trays are arranged on the frame side by side. The two trays correspond to the two tray resetting mechanisms respectively in position. The two first rollers are respectively arranged on the opposite sides of the bottoms of the two trays.

Preferably, the lower packing unit comprises a lower inclined plate and two lower grids. Two lower packing grids are arranged below the annular track side by side. Inclined sliding-out surfaces are arranged in the two lower packing grid openings. The lower wrap inclined plate is arranged between the annular guide rail and the lower wrap grid opening. The middle part of the lower package inclined plate and the frame form a rotating pair with a common axis parallel to the conveying direction of the sorting trolley. The lower package inclined plate is driven to turn over by a cylinder or a motor. And the two limit positions of the turning of the lower wrap inclined plate are respectively butted with the two lower wrap grids.

Preferably, the carriages of two adjacent sorting trolleys are hinged or connected by a ball hinge. Each sorting trolley is driven by a non-contact linear motor.

Preferably, the plate-turnover sorting machine further comprises a packing table. The upper packing table is arranged on the side part of the annular track. The lower wrapping table is positioned between the upper wrapping table and the tray resetting mechanism.

The sorting method of the plate-turning type sorting machine comprises the following steps:

step one, circularly moving each sorting trolley along a ring-shaped guide rail; the staff continuously send the parcels to be sorted to the moving sorting trolley; each parcel corresponds to a target lower parcel shelf.

Secondly, the packages are conveyed above a lower package table along with the sorting trolley, and when the distance between the packages and a target lower package grid reaches a preset value, a lower package switching cylinder in a lower package unit where the target lower package grid is located drives a lower package inclined plate to turn over and switch to a state of being in butt joint with the target lower package grid; the power element corresponding to the lower package unit where the target cell is located stirs the lock catch on the sorting trolley, so that the tray corresponding to the package is turned downwards, and the package is sent into the target cell through the lower package inclined plate.

And step three, when the sorting trolley with the tray turned downwards leaves the upper part of the lower packing table and reaches the position of the tray resetting mechanism, the tray turned downwards is gradually turned upwards to reset under the pushing of the inclined guide piece and is locked by the lock catch.

The invention has the beneficial effects that:

1. when the tray of the turnover plate type sorting trolley is reset, all the hydraulic springs can deform to buffer, so that the damage to the sorting trolley and the tray resetting mechanism caused by rigid impact is avoided. In addition, the brush also can play the effect of buffering when receiving the tray impact of letter sorting dolly to further protect the tray of slope guide and letter sorting dolly.

2. When the tray of the sorting trolley is clamped, the inclined guide piece is impacted by the tray but cannot push the tray to reset, and the inclined guide piece sinks through the deformation of the spring, so that the phenomenon that the extrusion force between the tray and the inclined guide piece is too large is avoided, and further accidents such as damage or derailment of the sorting trolley are avoided.

3. The tray of the sorting trolley is reset from a 90-degree state to a 0-degree state gradually, so that the tray has the advantages of small reset resistance, difficulty in failure, low noise and the like.

Drawings

Fig. 1 is an overall configuration diagram of embodiment 1 (tray returning mechanism) of the present invention;

fig. 2 is a schematic overall structure diagram of a flap sorter according to embodiment 8 of the present invention;

FIG. 3 is a schematic structural view of a sorting cart in embodiment 8 of the present invention;

FIG. 4 is a sectional view at a lower deck of embodiment 8 of the present invention;

fig. 5 is a schematic view showing the positional relationship among the sorting cart, the endless track, the lower deck, and the flap sorter according to embodiment 8 of the present invention (a partial enlarged view of a portion a in fig. 4).

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Example 1

As shown in fig. 1, a tray resetting mechanism of a flap-type sorting trolley comprises a base 1, an inclined guide part 2, a hydraulic spring 3, a first supporting seat 4, a second supporting seat 5, a brush 6, a brush fixing and clamping part 7 and a brush mounting bar 8. The base 1 is mounted on the frame 9 of the sorting machine. The first supporting seat 4 and the second supporting seat 5 are arranged at intervals and fixed on the base 1. The direction from the first supporting seat 4 to the second supporting seat 5 is the same as the conveying direction of the sorting machine. The first support seat 4 is lower than the second support seat 5. First supporting seat 4 and second supporting seat 5 all include spacing post in top and two blocks of curb plates. The top limiting column is fixed on the top between the two side plates. The arrangement direction of the two side plates is perpendicular to the conveying direction of the sorting machine. The tilt guide 2 is mounted on the base 1 by means of a hydraulic spring 3, a first support 4 and a second support 5.

The inclined guide member 2 is in a strip shape and penetrates through the lower parts of the limiting columns in the first supporting seat 4 and the second supporting seat 5. The hydraulic springs 3 are four in total. One ends of the two hydraulic springs 3 and the two side plates of the first supporting seat 4 respectively form a revolute pair, and the other ends of the two hydraulic springs and different positions of the inclined guiding piece 2 respectively form a revolute pair. One ends of the other two hydraulic springs 3 and the two side plates of the second supporting seat 5 respectively form a revolute pair, and the other ends of the other two hydraulic springs and different positions of the inclined guide 2 respectively form a revolute pair. Four hydraulic spring 3 all have the pretightning force, produce thrust to slope guide 2 for slope guide 2 supports the spacing post in first supporting seat 4 and the second supporting seat 5. Because the height of the first supporting seat 4 is different from that of the second supporting seat 5, the inclined guide part 2 is arranged obliquely, so that the tray which is turned downwards and opened by the turning plate type sorting trolley 11 can be conveniently pushed to reset. When the inclined guide part 2 is impacted externally, each hydraulic spring 3 can deform to buffer, and damage to the sorting trolley 11 and the reset mechanism caused by rigid impact is avoided. The brush attachment strip 8 is fixed to the top of the inclined guide 2. The brush 6 is mounted on a brush mounting bar 8 by a brush fixing clamp 7. The brush 6 can play a role of buffering when being impacted by the tray 11-4 of the sorting trolley 11, thereby further achieving the technical effect of prolonging the service life of the sorting trolley 11 and the reset mechanism and reducing the fault rate of the trolley damaged by impact to the lowest. .

Example 2

The utility model provides a tray canceling release mechanical system of board-turnover type letter sorting dolly, this embodiment differs with embodiment 1 in: the position that hydraulic spring 3 and first supporting seat 4 or second supporting seat 5 are connected can be adjusted to adjust hydraulic spring 3's pretightning force and the atress structure of slope guide 2. This position control is realized through slider and holding screw installed on first supporting seat 4, second supporting seat 5, or realizes through other current hinge point position control modes.

Example 3

The utility model provides a tray canceling release mechanical system of board-turnover type letter sorting dolly, this embodiment differs with embodiment 1 in: the position that hydraulic spring 3 is connected with slope guide 2 can be adjusted to the pretightning force of adjustment hydraulic spring 3 and the atress structure of slope guide 2. This position adjustment is achieved by means of a slide, a T-groove and a bolt and nut mounted on the tilting guide 2, or by means of other existing methods of adjusting the position of the hinge point.

Example 4

The utility model provides a tray canceling release mechanical system of board-turnover type letter sorting dolly, this embodiment differs with embodiment 1 in: the hydraulic spring 3 is replaced with a gas spring.

Example 5

The utility model provides a tray canceling release mechanical system of board-turnover type letter sorting dolly, this embodiment differs with embodiment 1 in: the hydraulic spring 3 is replaced with a metal compression spring.

Example 6

The utility model provides a tray canceling release mechanical system of board-turnover type letter sorting dolly, this embodiment differs with embodiment 1 in: the brush 6 is replaced with an elastic strip. The elastic strip is made of rubber or sponge.

Example 7

The utility model provides a tray canceling release mechanical system of board-turnover type letter sorting dolly, this embodiment differs with embodiment 1 in: the brush 6 is replaced with a guide plate connected to the tilt guide 2 by a plurality of springs. When the tray 11-4 of the sorting trolley 11 impacts the guide plate, the springs below the guide plate can be buffered through compression, so that rigid impact is avoided, and the service lives of the sorting trolley 11 and the reset mechanism are prolonged.

Example 8

As shown in fig. 2, a plate-turnover type sorting machine includes a frame 9, an endless track 10, a sorting trolley 11, an upper packing table (not shown), a lower packing table 12, and any one of the tray returning mechanisms 13 described in embodiments 1 to 7. An endless track 10 is mounted on top of the frame 9. A plurality of sorting trolleys 11 are arranged end to end in sequence on the circular track 10. The frame 11-1 of two adjacent sorting trolleys 11 is hinged or connected through a ball hinge. Each sorting trolley 11 is driven by a non-contact linear motor 14 and can periodically and continuously convey goods along the endless track 10. The non-contact linear motor 14 is fixed on the frame 9 and can push the secondary plate 11-6 (aluminum plate) on the sorting trolley 11 without contact. The packing table is arranged at the side part of the circular track 10 and is used for adding the goods packages to the sorting trolley 11. The lower packing table 12 is disposed directly below one of the endless tracks 10. Two tray resetting mechanisms 13 which are arranged side by side and at intervals are arranged below the annular track 10 (between the inner track and the outer track) and are positioned at the tail end of the lower packing table 12 (the position of the sorting trolley away from the upper part of the lower packing table). The top surface of the inclined guide part 2 in the tray resetting mechanism 13 is gradually raised along the conveying direction of the sorting trolley 11 from low to high, and the tray on the sorting trolley 11 can be gradually pushed to reset. The lower packing table 12 is located between the upper packing table and the tray returning mechanism 13.

As shown in FIG. 3, the sorting trolley 11 comprises a frame 11-1, a supporting wheel 11-2, a positioning wheel 11-3, a tray 11-4, a lock catch 11-5 and a secondary plate 11-6. Four supporting wheels 11-2 which are vertically arranged are arranged in pairs in a group and are arranged on two sides of the bottom of the frame 11-1 and are supported by the annular rail 10. The horizontally arranged positioning wheels 11-3 are supported at the side parts of the frame 11-1 and are used for matching with the side plates of the annular track 10 to realize the positioning and turning of the sorting trolley 11. The secondary plate 11-6 is fixed on one side of the frame 11-1 and is used for matching with a non-contact linear motor 14 on the frame 9. The two trays 11-4 are arranged on the frame 11-1 side by side. The two trays 11-4 correspond to the two tray resetting mechanisms 13 respectively in position. One side edge of the tray 11-4 is hinged with the frame 11-1. In the state that the tray 11-4 is not turned down, the hinge shaft of the tray 11-4 is positioned at one side of the tray 11-4 close to the conveying direction. So that the sorting trolley 11 with the trays 11-4 turned down can be turned up and reset when passing the inclined guide 2 of the tray resetting mechanism 13. The middle parts of the bottom surfaces of the two trays 11-4 are respectively fixed with an oblique block which is used for being matched with the tray resetting mechanism 13 to reduce the impact when the trays are reset. When the sorting trolley 11 is moved to the highest position of the inclined guide 2, the tray 11-4 is supported by the inclined guide 2, and the sorting trolley 11 as a whole is not derailed by the ceiling height.

The opposite side edges of both trays 11-4 support first rollers 11-7. The two sides of the bottom of the frame 11-1 are provided with lock catches 11-5 for locking the position of the tray 11-4. The middle part of the lock catch 11-5 is hinged with the bottom of the frame 11-1 (the rotating axis is vertically arranged). A torsional spring for resetting the lock catch 11-5 is arranged on a hinged shaft between the lock catch 11-5 and the frame 11-1. Two ends of the torsion spring are respectively fixed with the frame 11-1 and the lock catch 11-5. The inner end of the lock catch 11-5 is fixed with a limiting block 11-8. The top surface of the limiting block 11-8 is a plane and is used for supporting the first roller 11-7 on the tray 11-4, and the bottom surface is an inclined surface, so that the first roller 11-7 can push the limiting block 11-8 away when the tray 11-4 is turned upwards and reset, and resetting and locking are realized. The outer end of the lock catch 11-5 extends out and is used for being matched with a lock catch toggle cylinder 12-3 in the lower packing table 12 to toggle the lock catch 11-5, and releasing of locking of the tray 11-4 is achieved. In an initial state, the tray 11-4 is kept horizontal and supported by the limiting block 11-8 on the lock catch 11-5, and packages can be placed and transported; when the lock catch 11-5 is pulled, the first roller 11-7 on the tray 11-4 is separated from the limiting block 11-8, the tray 11-4 loses support and turns downwards, and a package placed on the tray 11-4 falls downwards into the package dropping table 12.

As shown in fig. 2, 4 and 5, the unpacking table 12 is composed of a plurality of unpacking units arranged in sequence along the conveying direction of the sorting cart 11. The lower ladle unit comprises a lower ladle inclined plate 12-1, a lower ladle switching cylinder 12-2, a lock catch toggle cylinder 12-3 and two lower ladle grids 12-4. Two lower packing compartments 12-4 are arranged side by side below the endless track 10. The two lower packing grids 12-4 are internally provided with inclined sliding-out surfaces with opposite directions. The lower packing sloping plate 12-1 is arranged between the annular guide rail and the lower packing grid 12-4. The middle part of the lower package inclined plate 12-1 and the frame 9 form a rotating pair with a common axis parallel to the conveying direction of the sorting trolley 11. The turning position of the lower package sloping plate 12-1 can determine which lower package grid the packages falling from the sorting trolley 11 fall into. The lower ladle switching cylinder 12-2 is arranged below the lower ladle inclined plate 12-1, the cylinder body is hinged with the rack 9, and the piston rod is hinged with the bottom surface of the lower ladle inclined plate 12-1; the pushing-out and retracting of the lower bag switching cylinder 12-2 can drive the lower bag inclined plate 12-1 to turn over, so that the grid opening into which the packages fall is controlled.

The two lock catch toggle cylinders 12-3 are respectively arranged at two sides in the annular track 10 and respectively correspond to the outer ends of the two lock catches 11-5 on the sorting trolley 11. The top end of a piston rod of the two lock catch toggle cylinders 12-3 is supported with a second roller 12-5. When the lock catch toggle cylinder 12-3 retracts, the second roller 12-5 is staggered with the outer end of the lock catch 11-5 on the corresponding side of the sorting trolley 11, and the lock catch 11-5 cannot be toggled when the sorting trolley 11 passes by; when the lock catch poking cylinder 12-3 is pushed out, the second roller 12-5 is aligned with the outer end of the lock catch 11-5 on the corresponding side of the sorting trolley 11, and the sorting trolley 11 pokes the lock catch 11-5 when passing through, so that the tray 11-4 on the corresponding side of the sorting trolley 11 is turned downwards.

firstly, each sorting trolley 11 circularly moves along an annular guide rail under the driving of a non-contact linear motor 14; the worker continuously sends the packages to be sorted to the moving sorting trolley 11 on the upper packing table; and the target lower package lattice corresponding to each package is obtained in advance in a code scanning mode.

And secondly, conveying the packages to the upper part of a lower package table 12 along with the sorting trolley 11, when the distance between the packages and a target lower package grid reaches a preset value (the distance has passed through a lock catch toggle cylinder 12-3 of a last lower package unit of the lower package unit where the target grid is located), driving a lower package inclined plate 12-1 to turn over and switch to a state of abutting against the target grid by a lower package switching cylinder 12-2 in the lower package unit where the target grid is located, pushing out a lock catch toggle cylinder 12-3 corresponding to the lower package unit where the target grid is located, enabling a corresponding second roller 12-5 to toggle a corresponding lock catch 11-5 on the sorting trolley, enabling a tray 11-4 corresponding to the packages to turn downwards, and enabling the packages to be conveyed to the target grid through the lower package inclined plate 12-1.

And step three, when the sorting trolley 11 with the tray 11-4 turned downwards leaves the upper part of the lower packing table 12 and arrives at the tray resetting mechanism 13, the tray 11-4 turned downwards is gradually turned upwards under the pushing of the inclined guide piece 2, and finally the first roller 11-7 on the tray 11-4 pushes the limiting block 11-8 on the corresponding lock catch 11-5 to be reset and is supported by the limiting block 11-8 again. Because the trolley tray is reset from a 90-degree state to a 0-degree state gradually, the trolley tray reset mechanism has the advantages of small reset resistance, difficulty in failure, low noise and the like.

If a situation that a card package is in the tray 11-4 occurs, the tray 11-4 is difficult to reset under the pushing of the inclined guide part 2, the stress of the inclined guide part 2 is increased to deform the spring, and then the inclined guide part 2 sinks, so that the damage of the sorting trolley 11 or the tray resetting mechanism 13 caused by overlarge extrusion force between the tray 11-4 and the inclined guide part 2 is avoided. At this moment, although the tray of the sorting trolley 11 cannot be reset, the whole sorting machine can continue to normally operate, the worse accidents such as trolley damage or derailment are avoided, and the efficient sorting of the packages is effectively realized.

Claims

1. A tray resetting mechanism of a turnover plate type sorting trolley comprises a base (1) and an inclined guide piece (2); the method is characterized in that: the device also comprises an elastic connecting piece; the inclined guide piece (2) is arranged on the base (1) through an elastic connecting piece; in an initial state, the top surface of the inclined guide piece (2) is obliquely arranged and is used for guiding the tray of the sorting trolley to reset; when the inclined guide piece (2) is impacted externally, the elastic connecting piece is deformed under stress, and the inclined guide piece (2) is displaced along with the deformation to realize buffering.

2. The tray repositioning mechanism for a flipper-type sorting trolley according to claim 1, wherein: the guide buffer layer is also included; the guide buffer layer is arranged on the top surface of the inclined guide piece.

3. The tray repositioning mechanism for a flipper-type sorting trolley according to claim 1, wherein: the base (1) is provided with an inclined guide piece (2) used for installation, and a first supporting seat (4) and a second supporting seat (5); the first supporting seat (4) and the second supporting seat (5) are arranged at intervals and are fixed on the base (1); the direction from the first supporting seat (4) to the second supporting seat (5) is the same as the conveying direction of the sorting machine; the first supporting seat (4) is lower than the second supporting seat (5); the first supporting seat (4) and the second supporting seat (5) both comprise a top limiting column and two side plates; the top limiting column is fixed between the two side plates.

4. The tray repositioning mechanism of a flipper-type sorting trolley according to claim 3, wherein: the inclined guide piece (2) is in a strip shape and penetrates through the first supporting seat (4) and the second supporting seat (5) below the limiting column; the inclined guide piece (2) is propped against the limiting column under the action of the elastic connecting piece.

5. The tray repositioning mechanism for a flipper-type sorting trolley according to claim 1, wherein: one end of each elastic connecting piece is hinged with the base (1), and the other end of each elastic connecting piece is hinged with the inclined guide piece (2), so that the inclined guide pieces (2) can keep a stable inclined state when not impacted by the outside.

6. The tray repositioning mechanism for a flipper-type sorting trolley according to claim 5, wherein: the connecting position of each elastic connecting piece and the base (1) is adjustable.

7. The tray repositioning mechanism for a flipper-type sorting trolley according to claim 5, wherein: the connection position of each elastic connecting piece and the inclined guide piece (2) is adjustable.

8. The tray repositioning mechanism for a flipper-type sorting trolley according to claim 1, wherein: the elastic connecting piece adopts a hydraulic spring (3), a gas spring or a metal spring.

9. A tray resetting mechanism of a turnover plate type sorting trolley comprises a base (1) and an inclined guide piece (2); the method is characterized in that: the guide buffer layer is also included; the inclined guide piece (2) is arranged on the base (1), the top surface of the inclined guide piece is obliquely arranged, and the inclined guide piece is used for guiding the tray of the sorting trolley to reset; the guide buffer layer is arranged on the top surface of the inclined guide piece.

10. The tray repositioning mechanism for a flipper sorting cart of claim 9, wherein: the guide buffer layer adopts a brush (6) with upward bristles.

11. The tray repositioning mechanism for a flipper sorting cart of claim 9, wherein: the guide buffer layer is made of strip-shaped elastic materials.

12. The tray repositioning mechanism for a flipper sorting cart of claim 9, wherein: the guide buffer layer comprises a guide plate and a plurality of springs; the guide plate is connected to the top surface of the inclined guide (2) by a plurality of springs.

13. A plate-turnover sorting machine comprising the tray resetting mechanism of any one of claims 1 to 12, and further comprising a frame (9), an annular rail (10), a sorting trolley (11) and a lower packing table (12); the method is characterized in that: the annular track (10) is arranged on the frame (9); a plurality of sorting trolleys (11) are sequentially arranged on the annular track (10) end to end; a tray locked by a lock catch is arranged on the sorting trolley (11); when the lock catch is pulled, the tray is turned downwards; the lower wrapping table (12) is arranged right below the annular track (10); the tray resetting mechanism (13) is arranged below the annular track (10) and is positioned at the tail end of the lower wrapping table (12); the number of the tray resetting mechanisms (13) corresponds to the number of the trays on a single sorting trolley (11); the top surface of the inclined guide piece (2) in the tray resetting mechanism (13) is gradually raised from low along the conveying direction of the sorting trolley (11); the lower packing table (12) consists of a plurality of lower packing units which are sequentially arranged along the conveying direction of the sorting trolley (11); a power element for shifting the lock catch on the sorting trolley (11) is arranged in the lower packing unit.

14. The flap sorter of claim 13, wherein: a power element used for shifting the lock catch in the lower wrapping unit adopts a lock catch shifting cylinder (12-3); the lock catch toggle cylinder (12-3) is arranged on the side part of the annular track (10) and corresponds to the outer end of the lock catch (11-5) on the sorting trolley (11); a second roller (12-5) is supported at the top end of a piston rod of the lock catch toggle cylinder (12-3); when the second roller (12-5) is at the first limit position, the second roller (12-5) is staggered with the outer end of the lock catch (11-5), and the lock catch (11-5) cannot be pulled by the sorting trolley (11) when the sorting trolley (11) passes by; when the second roller (12-5) is at the second limit position, the second roller (12-5) is aligned with the outer end of the lock catch (11-5), and the sorting trolley (11) is pulled by the lock catch (11-5) when passing by, so that the tray (11-4) at the corresponding side of the sorting trolley (11) is turned downwards.

15. The flap sorter of claim 13, wherein: one side edge of a tray (11-4) on the sorting trolley (11) is hinged with the frame (11-1); under the state that the tray (11-4) is not turned over downwards, a hinge shaft on the tray (11-4) is positioned at one side of the tray (11-4) close to the conveying direction; a first roller (11-7) is supported at one side edge of the tray (11-4); the lock catch (11-5) is arranged at the bottom of the frame (11-1) and corresponds to the first roller (11-7); the lock catch (11-5) and the frame (11-1) form a revolute pair and are elastically connected; the lock catch (11-5) resets under the action of elasticity after being stirred; a limiting block (11-8) is fixed at the inner end of the lock catch (11-5); the top surfaces of the limiting blocks (11-8) are planes and support the first rollers (11-7), so that the tray (11-4) is locked; the bottom surfaces of the limiting blocks (11-8) are inclined surfaces, so that the first rollers (11-7) can push the limiting blocks (11-8) away when the tray (11-4) is turned upwards and reset, and the reset and the locking of the tray (11-4) are realized.

16. The flap sorter of claim 13, wherein: the sorting trolley (11) comprises a trolley frame (11-1), supporting wheels (11-2), positioning wheels (11-3), a tray (11-4), a lock catch (11-5) and a secondary plate (11-6); a plurality of vertically arranged supporting wheels (11-2) are arranged at the bottom of the frame (11-1); the horizontally arranged positioning wheel (11-3) is supported at the side part of the frame (11-1); the secondary plate (11-6) is fixed on one side of the frame (11-1); the two trays (11-4) are arranged on the frame (11-1) side by side; the two trays (11-4) correspond to the two tray resetting mechanisms (13) in position respectively; the two first rollers (11-7) are respectively arranged on the opposite sides of the bottoms of the two trays (11-4).

17. The flap sorter of claim 13, wherein: the lower packing unit comprises a lower packing inclined plate (12-1) and two lower packing grids (12-4); the two lower packing grids (12-4) are arranged below the annular track (10) side by side; inclined sliding-out surfaces are arranged in the two lower packing grids (12-4); the lower wrap inclined plate (12-1) is arranged between the annular guide rail and the lower wrap lattice opening (12-4); the middle part of the lower inclined plate (12-1) and the frame (9) form a rotating pair with a common axis parallel to the conveying direction of the sorting trolley (11); the lower wrapping inclined plate (12-1) is driven to turn over by a cylinder or a motor; the two limit positions of the turning of the lower wrap inclined plate (12-1) are respectively butted with the two lower wrap grids (12-4).

18. The flap sorter of claim 13, wherein: the frames (11-1) of two adjacent sorting trolleys (11) are hinged or connected through a ball hinge; each sorting trolley (11) is driven by a non-contact linear motor (14).

19. The flap sorter of claim 13, wherein: the device also comprises a packing table; the upper packing table is arranged on the side part of the annular track (10); the lower packing table (12) is positioned between the upper packing table and the tray resetting mechanism (13).

20. The sorting method of a flap sorter according to claim 13, wherein: step one, each sorting trolley (11) circularly moves along an annular guide rail; the staff continuously send the parcels to be sorted to the moving sorting trolley (11); each parcel corresponds to a target lower parcel shelf;

secondly, the packages are conveyed above a lower package table (12) along with a sorting trolley (11), and when the distance between the packages and a target lower package grid reaches a preset value, a lower package switching cylinder (12-2) in a lower package unit where the target lower package grid is located drives a lower package inclined plate (12-1) to be turned over and switched to a state of butting the target lower package grid; the power element corresponding to the lower package unit where the target cell is located dials the lock catch (11-5) on the sorting trolley, so that the tray (11-4) corresponding to the package is turned over downwards, and the package is sent to the target lower package cell through the lower package inclined plate (12-1);

and step three, when the sorting trolley (11) with the tray (11-4) turned downwards leaves the upper part of the lower packing table (12) and reaches the position of the tray resetting mechanism (13), the tray (11-4) turned downwards is gradually turned upwards to reset under the pushing of the inclined guide piece (2) and is locked by the lock catch.