Logistics conveying line and working method thereof

Abstract

The invention discloses a logistics conveying line and a working method thereof, and relates to the technical field of logistics, the logistics conveying line comprises a first conveying line, a second conveying line and a third conveying line which are distributed in a T shape, and sorting and distributing units are arranged among the first conveying line, the second conveying line and the third conveying line; the sorting and distributing unit comprises a fixing frame, a conveying frame, a driving cylinder, a slope plate and a sorting door frame. The conveying frame is rotatably arranged on the fixing frame and can be driven by the driving cylinder to rotate so as to be switched between a horizontal working state and an inclined working state; the slope plate is fixed to the fixing frame and located in a gap between every two adjacent rollers, and a plurality of idler wheels are arranged on the slope plate side by side along the inclined edge and meet the following conditions that when the conveying frame is in a horizontal working state, all the idler wheels are shorter than the rollers; and when the conveying frame is in an inclined working state, the rollers are higher than the rollers. During logistics conveying, automatic sorting of the large boxes and the small boxes can be completed, and separate conveying of the boxes can be automatically completed after sorting.

Description

Technical Field

[0001] The present invention relates to the technical field of logistics, and in particular to a logistics conveying line and a working method thereof. Background Art

[0002] Boxes of different sizes have different risks of being damaged during the logistics process. Large boxes are large and heavy. If they are mixed with small boxes during handling, transportation and storage, they may cause damage to the small boxes due to collision, squeezing, etc. For example, during loading and unloading, a large box may crush the small box next to it. Therefore, it is necessary to classify logistics boxes of different sizes. At present, they are basically sorted manually, which has the problems of large workload, low efficiency and high cost.

[0003] Therefore, it is necessary to design a logistics conveying line that can not only complete the automatic sorting of large and small boxes during logistics transportation, but also automatically complete the separate diversion and transportation after sorting. Summary of the invention

[0004] The object of the present invention is to provide a logistics conveying line and a working method thereof to solve the above-mentioned defects caused by the prior art.

[0005] A logistics conveying line, comprising a first conveying line, a second conveying line and a third conveying line arranged in a T-shape, wherein the first conveying line and the second conveying line are arranged in a co-linear manner, and a sorting and diversion unit is arranged at the junction between the first conveying line, the second conveying line and the third conveying line;

[0006] The sorting and diverting unit comprises a fixed frame, a conveying frame, a driving cylinder, a ramp plate and a sorting door frame; the conveying frame is rotatably arranged on the fixed frame and can be driven to rotate by the driving cylinder and switched between a horizontal working state and an inclined working state, and a plurality of rollers are arranged side by side and at intervals on the conveying frame; the sorting door frame is fixed on the conveying frame and is close to the second conveying line; a contact switch for detecting whether the sorting door frame blocks the box N is arranged on the sorting door frame; the contact switch is electrically connected to the controller; the ramp plate is fixed on the fixed frame and is located in the gap between two adjacent rollers, the lower side of the ramp plate faces the third conveying line, and a plurality of rollers are arranged side by side along the inclined edge of the ramp plate and meet the following conditions:

[0007] When the conveying frame is in a horizontal working state, each of the rollers is lower than the roller; when the conveying frame is in an inclined working state, each of the rollers is higher than the roller.

[0008] Furthermore, the working height of the sorting gantry is adjustable.

[0009] Furthermore, the first conveying line, the second conveying line and / or the third conveying line adopt roller conveyors.

[0010] Furthermore, the driving cylinder is a telescopic cylinder;

[0011] One end of the conveying frame located away from the lower side of the ramp plate is hinged to the fixed frame; the driving cylinder is located below the conveying frame, the bottom of the driving cylinder is hinged to the fixed frame, and the output end of the driving cylinder is hinged to the other end of the conveying frame.

[0012] Furthermore, a transition wheel is arranged on the conveyor frame near the third conveyor line; and when the conveyor frame is in an inclined working state, the transition wheel is shorter than the roller located at the lowest position on the ramp plate.

[0013] The present invention also discloses a working method of a logistics conveying line, comprising the following steps:

[0014] S10, placing the sorting and diverting unit in a first working mode, wherein the conveying frame is in a horizontal working state and each of the rollers is shorter than the roller;

[0015] S20, the box N is horizontally conveyed on the first conveying line toward the second horizontal conveying line; then it moves to the sorting and diverting unit and continues to be horizontally conveyed forward on the rollers;

[0016] S30, collecting in real time whether the sorting door frame blocks the box N through the contact switch and sending different signals to the controller; if it is not blocked, proceed to step S40; if it is blocked, proceed to step S50;

[0017] S40, if the signal is not blocked, it is determined that the box N is a small box; the sorting and diverting unit is controlled to continue to maintain the first working mode, and each of the rollers is shorter than the roller, and the box N continues to pass through the sorting gantry under the action of the roller and then moves to the second conveying line;

[0018] S50: If the signal is blocked, it is determined that the box N is a large box, and the following actions are performed:

[0019] S501, first start the driving cylinder to work and make the conveyor frame in an inclined working state, and each of the rollers will be higher than the roller, and at this time the sorting and diverting unit switches to the second working mode;

[0020] S502, maintaining the second working mode for a certain period of time T; during this period, the box N will first fall from the roller to the roller, and then transition to the third conveyor line under the conveying action of the roller;

[0021] S503, first start the driving cylinder to work and make the conveyor frame in a horizontal working state, at this time the sorting and diverting unit returns to the first working mode.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. The present invention can not only automatically sort large and small boxes during logistics transportation, but also automatically complete the separate diversion transportation after sorting. Since the boxes transported horizontally from the first conveyor line will first be transported horizontally forward on the rollers of the sorting and diversion unit toward the second conveyor line, if the box is not blocked by the sorting gantry, the box will continue to pass through the sorting gantry and be transported to the second horizontal conveyor line; if the box is blocked by the sorting gantry, the box cannot be transported forward to the second horizontal conveyor line; the sorting and diversion unit will start the drive cylinder and switch the conveyor frame to the inclined working state, and then the box on the roller will first fall onto the roller, and then transition to the third conveyor line under the action of the roller conveying; then it will automatically reset to welcome the next box transported from the first conveyor line, and repeat the work.

[0024] 2. The present invention can automatically switch between two working states of the conveyor frame. When the conveyor frame is driven to rotate and switch to the inclined working state by the driving cylinder, the rollers on the ramp plate keep the height unchanged, but the conveyor frame and the rollers thereon continuously rotate and tilt downward to become shorter, so that each roller moves relatively in the gap between the two rollers and is safely exposed upward without interfering with each other; during this period, the box on the roller will automatically fall onto the roller, thus completing the automatic switching ingeniously, the movement is very smooth, and no strong vibration will be generated. At the same time, the gap between two adjacent rollers is ingeniously utilized, and the staggered layout is very compact, without interference, and the conveying is stable and reliable.

[0025] 3. The present invention uses the rollers on the ramp to transport the boxes to the third conveyor line in a rolling contact manner to avoid being stuck on the rollers. When the boxes need to slide down to the third conveyor line, since the rolling direction of the rollers is perpendicular to the sliding direction of the boxes, if they rely on the rollers to slide down, there is no longer rolling contact between them, which increases the friction resistance and slows down the sliding efficiency.

[0026] 4. The present invention can make the box be transferred between the lowest roller and the third conveyor line through the transition wheel, which can ensure that the box is smoother and less vibrating when transferring between the sorting and diversion unit and the third conveyor line, and is safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional schematic diagram of the entire logistics conveyor line.

[0028] Figure 2 It is a three-dimensional schematic diagram of the entire sorting, diversion and conveying unit.

[0029] Figure 3 This is a schematic diagram of the overall explosion of the sorting, diversion and conveying unit.

[0030] Figure 4 This is a three-dimensional schematic diagram of the first conveyor line in the logistics conveyor line transporting small boxes.

[0031] Figure 5 A three-dimensional schematic diagram of the sorting and diversion unit in the logistics conveyor line transporting small boxes.

[0032] Figure 6 for Figure 5 Schematic diagram of the cross-section of section AA.

[0033] Figure 7 This is a three-dimensional schematic diagram of the second conveyor line in the logistics conveyor line transporting small boxes.

[0034] Figure 8 This is a three-dimensional schematic diagram of the first conveyor line in the logistics conveyor line transporting large boxes.

[0035] Fig. 9 A 3D schematic diagram of a sorting and diversion unit in a logistics conveyor line blocking a large box.

[0036] Fig.10 A three-dimensional schematic diagram of the sorting and diversion unit in the logistics conveyor line transporting large boxes.

[0037] Fig.11 for Fig.10 Schematic diagram of the cross-section of section BB.

[0038] Fig.12 It is a three-dimensional schematic diagram of a part of the sorting, diversion and conveying unit.

[0039] Fig.13 It is a schematic diagram of the structure of the sorting door frame in the sorting, diversion and conveying unit.

[0040] in:

[0041] 1. The first conveyor line;

[0042] 2. The second conveyor line;

[0043] 3. The third conveyor line;

[0044] 4. Sorting and diverting unit; 4-1. Fixed frame; 4-2. Conveying frame; 4-3. Driving cylinder; 4-4. Inclined plate; 4-5. Sorting door frame; 4-51. Vertical strip hole; 4-52. Bolt; 4-6. Roller; 4-7. Roller; 4-8. Transition wheel; 4-11. Second connecting seat; 4-12. Fourth connecting seat; 4-21. First connecting seat; 4-22. Third connecting seat;

[0045] 5. Contact switch;

[0046] N. Box. DETAILED DESCRIPTION

[0047] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0048] Embodiment 1:

[0049] See also Figure 1 , a logistics conveying line, comprising a first conveying line 1, a second conveying line 2 and a third conveying line 3 which are distributed in a T shape, wherein the first conveying line 1 and the second conveying line 2 are arranged in a co-linear manner, and a sorting and diversion unit 4 is arranged at the junction between the first conveying line 1, the second conveying line 2 and the third conveying line 3;

[0050] Among them, it can be combined Figure 2-3 , the sorting and diverting unit 4 includes a fixed frame 4-1, a conveying frame 4-2, a driving cylinder 4-3, a ramp plate 4-4 and a sorting door frame 4-5; the conveying frame 4-2 is rotatably arranged on the fixed frame 4-1 and can be driven to rotate by the driving cylinder 4-3 and switched between a horizontal working state and an inclined working state, and a plurality of rollers 4-6 are arranged side by side and at intervals on the conveying frame 4-2; the sorting door frame 4-5 is fixed on the conveying frame 4-2 and is close to the second conveying line 2; a contact switch 5 for detecting whether the sorting door frame 4-5 blocks the box N is arranged on the sorting door frame 4-5; the contact switch 5 is electrically connected to the controller; the ramp plate 4-4 is fixed on the fixed frame 4-1 and is located in the gap between two adjacent rollers 4-6, the lower side of the ramp plate 4-4 faces the third conveying line 3, and a plurality of rollers 4-7 are arranged side by side along the inclined edge on the ramp plate 4-4 and meet the following conditions:

[0051] When the conveying frame 4-2 is in a horizontal working state, each of the rollers 4-7 is shorter than the rollers 4-6. At this time, the rollers 4-6 on the conveying frame 4-2 are in a horizontal working state.

[0052] When the conveying frame 4-2 is in a tilted working state, each of the rollers 4-7 is higher than the rollers 4-6. At this time, the rollers 4-6 on the conveying frame 4-2 are in a tilted working state.

[0053] When the present embodiment is working, the boxes conveyed horizontally from the first conveyor line (see Figure 4 and Figure 8 ), it will first be transported horizontally forward on the rollers of the sorting and diversion unit toward the second conveyor line. If the box is not blocked by the sorting gantry (in this case, it is a small box), the box will continue to pass through the sorting gantry and be transported to the second horizontal conveyor line (see Figure 5 and Figure 7 ); If the box is blocked by the sorting door frame (this is a large box, see Fig. 9 ), the box cannot be transported forward to the second horizontal conveyor line; the sorting and diversion unit will start the drive cylinder to switch the conveyor frame to the inclined working state, and then the box on the roller will first fall onto the roller, and then transition to the third conveyor line under the conveying action of the roller (see Figure 10-11 ); then automatically reset (see Figure 1 ), and then receive the next box delivered by the first conveyor line, and repeat the process. Therefore, the present invention can realize not only automatic sorting of large and small boxes (separating large and small boxes) during logistics transportation, but also automatic diversion and transportation after sorting.

[0054] See also Figure 2-3 , and in this embodiment, the ramp plate 4-4 is fixed on the fixed frame 4-1 and is located in the gap between two adjacent rollers 4-6. When the conveying frame 4-2 is in a horizontal working state, each roller 4-7 is shorter than the roller 4-6, and the roller 4-7 will not interfere with the normal horizontal conveying of the roller 4-6 (see Figure 5-6 ); and when the conveyor frame 4-2 is driven to rotate and switch to the inclined working state by the driving cylinder 4-3, the rollers 4-7 on the ramp plate 4-4 keep the same height, but the conveyor frame 4-2 and the rollers 4-6 thereon continuously rotate and tilt and become shorter, so that the rollers move relative to each other in the gap between the two rollers 4-6 and are safely exposed upward without interfering with each other; during this period, the box on the roller 4-6 will automatically fall onto the roller 4-7 (see Figure 10-11 ), so the automatic switching is cleverly completed, the movement is very smooth, and no strong vibration is generated. At the same time, the gap between two adjacent rollers 4-6 is cleverly utilized. Through the staggered layout, it is very compact, will not interfere with each other, and the transportation is stable and reliable.

[0055] In addition, since the boxes are transported to the third conveyor line 3 by rolling along the rollers 4-7 on the ramp plate 4-4 in an inclined direction, they can be prevented from being stranded on the rollers 4-6 (the problem is that when the boxes need to slide down to the third conveyor line, the rolling direction of the rollers 4-6 is perpendicular to the sliding direction of the boxes. If the boxes slide down by the inclination of the rollers 4-6, there is no longer rolling contact between them, which increases the friction resistance and slows down the sliding efficiency. Especially when the boxes are too heavy, the stranding problem is very likely to occur). The rollers 4-7 on the ramp plate 4-4 allow the boxes to be transported to the third conveyor line 3 in a rolling contact manner, which just overcomes this problem and disadvantage.

[0056] In this embodiment, the first conveying line 1, the second conveying line 2 and / or the third conveying line 3 are roller conveyors.

[0057] In other embodiments, the first conveyor line 1, the second conveyor line 2 and / or the third conveyor line 3 may be a belt conveyor or a chain conveyor.

[0058] In this embodiment, the driving cylinder 4-3 adopts a telescopic cylinder; the end of the conveying frame 4-2 located away from the lower side of the ramp plate 4-4 is hinged to the fixed frame 4-1; the driving cylinder 4-3 is located below the conveying frame 4-2, the bottom of the driving cylinder 4-3 is hinged to the fixed frame 4-1, and the output end of the driving cylinder 4-3 is hinged to the other end of the conveying frame 4-2.

[0059] Specifically, the conveying frame 4-2 has a first connecting seat 4-21 at one end located away from the lower side of the ramp plate 4-4, and the fixing frame 4-1 has a second connecting seat 4-11 hinged to the first connecting seat 4-21.

[0060] Specifically, the other end of the conveying frame 4-2 has a third connecting seat 4-22, and the fixed frame 4-1 has a fourth connecting seat 4-12; the bottom of the driving cylinder 4-3 is hinged to the fourth connecting seat 4-12, and the output end of the driving cylinder 4-3 is hinged to the third connecting seat 4-22.

[0061] During switching, the driving cylinder 4-3 drives the conveying frame 4-2 to rotate along the hinge center of the first connecting seat 4-21 and the second connecting seat 4-11, thereby realizing automatic switching of different working states (compare Figure 6 and Fig.11That is, when the output end of the driving cylinder 4-3 is extended outward, the conveyor frame 4-2 is in a horizontal working state and each roller 4-7 is lower than the roller 4-6; when the output end of the driving cylinder 4-3 is retracted, the conveyor frame 4-2 is in a horizontal working state and each roller 4-7 is lower than the roller 4-6. Therefore, the driving cylinder 4-3 can realize the rotation change of the conveyor frame 4-2, thereby realizing the automatic switching of the working state, and when the conveyor frame 4-2 is in a horizontal working state or an inclined working state, the working state is maintained unchanged by maintaining pressure.

[0062] Furthermore, two transition wheels 4-8 are rotatably mounted on the conveyor frame 4-2 near the third conveyor line 3; and when the conveyor frame 4-2 is in an inclined working state, the transition wheel 4-8 is shorter than the lowest roller 4-7 on the ramp plate 4-4. The boxes are transferred between the lowest roller 4-7 and the third conveyor line 3 through the transition wheel 4-8, which can ensure that the boxes are transferred between the sorting and diverting unit 4 and the third conveyor line 3 more smoothly and with less vibration, and are safer and more reliable.

[0063] Embodiment 2:

[0064] Based on the logistics conveying line described in Example 1, this embodiment discloses a working method, which includes the following steps:

[0065] S10, the sorting and diverting unit 4 is in the first working mode, at which time its conveying frame 4-2 is in a horizontal working state and each of the rollers 4-7 is shorter than the rollers 4-6 (see Figure 4 and Figure 8 );

[0066] S20, the box is horizontally conveyed on the first conveyor line 1 toward the second horizontal conveyor line 4; then it moves to the sorting and diverting unit 4 and continues to be horizontally conveyed forward on the action of rollers 4-6 (see Figure 5 and Fig. 9 );

[0067] S30, collecting in real time whether the sorting door frame 4-5 blocks the box N through the contact switch 5 and sending different signals to the controller; if it is not blocked, proceed to step S40; if it is blocked, proceed to step S50;

[0068] S40: If the signal is not blocked, determine that the box N is a small box (see Figure 5-6 ); the sorting and diverting unit 4 is controlled to continue to maintain the first working mode, and each of the rollers 4-7 will be shorter than the rollers 4-6, and the box N continues to pass through the sorting gantry 4-5 under the action of the rollers 4-6 and then moves to the second conveyor line 2 (see Figure 7 );

[0069] S50: If the signal is blocked, determine that the box N is a large box (see Fig. 9 ), the following actions will be performed:

[0070] S501, first start the driving cylinder 4-3 to work and make the conveying frame 4-2 in an inclined working state, and each of the rollers 4-7 will be higher than the roller 4-6, and at this time the sorting and diverting unit 4 switches to the second working mode;

[0071] S502, maintain the second working mode for a certain period of time T; during this period, the box N will first fall from the roller 4-6 to the roller 4-7, and then transition to the third conveyor line 3 under the conveying action of the roller 4-7 (see Figure 10-11 );

[0072] S503, first start the driving cylinder 4-3 to work and make the conveying frame 4-2 in a horizontal working state, at this time, the sorting and diverting unit 4 returns to the first working mode ( Figure 1 ).

[0073] Then, repeat the above steps.

[0074] Therefore, the method of the present invention can automatically complete the identification and distinction between large and small boxes (i.e., sorting or classification), and at the same time can automatically divert and transport them according to the size of the boxes (i.e., divert or transport them separately), without the need for manual operation, and can achieve fully automated production.

[0075] In addition, the present invention can prevent incorrect sorting through the sorting door frame 4-5, and can also maintain the blocking and guiding effect on the large boxes when the conveying frame 4-2 is tilted and rotated, and can ensure that the large boxes are smoothly transported obliquely to the third conveying line.

[0076] Embodiment 3:

[0077] This embodiment is basically the same as embodiment 1, except that:

[0078] See also Figure 12-13 Furthermore, the working height of the sorting door frame 4-5 is adjustable, and the working height of the sorting door frame 4-5 can be adjusted accordingly according to the parameter requirements of the box size N diversion to meet the multi-functional requirements. The sorting size can be adjusted at any time according to the demand changes of the goods to meet different needs.

[0079] Specifically, vertical strip holes 4-51 are provided on both side edges of the sorting gantry 4-5, and the vertical strip holes 4-51 and the conveying frame 4-2 are fixed by bolts 4-52. Since the matching position between the vertical strip holes 4-51 and the bolts 4-52 can be adjusted up and down, the working height adjustment of the sorting gantry 4-5 is realized.

[0080] Therefore, the embodiments disclosed above are only illustrative in all aspects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A logistics conveying line, comprising a first conveying line (1), a second conveying line (2) and a third conveying line (3) arranged in a T-shape, wherein the first conveying line (1) and the second conveying line (2) are arranged in the same line, and characterized in that: A sorting and diverting unit (4) is provided at the junction between the first conveying line (1), the second conveying line (2) and the third conveying line (3); The sorting and diverting unit (4) comprises a fixed frame (4-1), a conveying frame (4-2), a driving cylinder (4-3), a ramp plate (4-4) and a sorting door frame (4-5); the conveying frame (4-2) is rotatably arranged on the fixed frame (4-1) and can be driven to rotate by the driving cylinder (4-3) to switch between a horizontal working state and an inclined working state; a plurality of rollers (4-6) are arranged side by side and at intervals on the conveying frame (4-2); the sorting door frame (4-5) is fixed on the conveying frame (4-2) and is close to the The second conveyor line (2); the sorting door frame (4-5) is provided with a contact switch (5) for detecting whether the sorting door frame (4-5) blocks the box (N); the contact switch (5) is electrically connected to the controller; the ramp plate (4-4) is fixed on the fixed frame (4-1) and is located in the gap between two adjacent rollers (4-6), the lower side of the ramp plate (4-4) faces the third conveyor line (3), and a plurality of rollers (4-7) are arranged side by side along the inclined edge on the ramp plate (4-4) and meet the following conditions: When the conveying frame (4-2) is in a horizontal working state, each of the rollers (4-7) is shorter than the roller (4-6); when the conveying frame (4-2) is in an inclined working state, each of the rollers (4-7) is higher than the roller (4-6).

2. A logistics conveying line according to claim 1, characterized in that: The working height of the sorting door frame (4-5) is adjustable.

3. A logistics conveying line according to claim 1, characterized in that: The first conveying line (1), the second conveying line (2) and / or the third conveying line (3) use roller conveyors.

4. A logistics conveying line according to claim 1, characterized in that: The driving cylinder (4-3) is a telescopic cylinder; One end of the conveying frame (4-2) that is located away from the lower side of the ramp plate (4-4) is hinged to the fixed frame (4-1); the driving cylinder (4-3) is located below the conveying frame (4-2), the bottom of the driving cylinder (4-3) is hinged to the fixed frame (4-1), and the output end of the driving cylinder (4-3) is hinged to the other end of the conveying frame (4-2).

5. A logistics conveying line according to claim 1, characterized in that: A transition wheel (4-8) is arranged on the conveying frame (4-2) near the third conveying line (3); and when the conveying frame (4-2) is in an inclined working state, the transition wheel (4-8) is shorter than the roller (4-7) located at the lowest position on the ramp plate (4-4).

6. A working method of a logistics conveyor line, characterized in that: The steps include: S10, placing the sorting and diverting unit (4) in a first working mode, wherein the conveying frame (4-2) is in a horizontal working state and each of the rollers (4-7) is shorter than the roller (4-6); S20, the box (N) is horizontally conveyed on the first conveying line (1) toward the second horizontal conveying line (4); then it moves to the sorting and diverting unit (4) and continues to be horizontally conveyed forward under the action of the rollers (4-6); S30, collecting in real time whether the sorting door frame (4-5) blocks the box (N) through the contact switch (5) and sending different signals to the controller; If the signal is not blocked, the process proceeds to step S40; if the signal is blocked, the process proceeds to step S50; S40, if the signal is not blocked, it is determined that the box (N) is a small box; the sorting and diverting unit (4) is controlled to continue to maintain the first working mode, and each of the rollers (4-7) will be shorter than the rollers (4-6), and the box (N) continues to pass through the sorting door frame (4-5) under the action of the rollers (4-6) and then moves to the second conveying line (2); S50: If the signal is blocked, it is determined that the box (N) is a large box, and the following actions are performed: S501, first start the driving cylinder (4-3) to work and put the conveying frame (4-2) into an inclined working state, and each of the rollers (4-7) will be higher than the roller (4-6), and at this time the sorting and diverting unit (4) is switched to the second working mode; S502, maintaining the second working mode for a certain period of time T; during this period, the box (N) will first fall from the roller (4-6) to the roller (4-7), and then transition to the third conveyor line (3) under the conveying action of the roller (4-7); S503, first start the driving cylinder (4-3) to work and make the conveying frame (4-2) in a horizontal working state, at which time the sorting and diverting unit (4) returns to the first working mode.

Images