A step elevator and a method of lifting thereof

Abstract

The application provides a step-by-step elevator and a lifting method thereof. The step-by-step elevator comprises a frame, a driving assembly arranged at the top of the frame, a passive assembly arranged at the bottom of the frame, two groups of annularly arranged lifting chains arranged between the driving assembly and the passive assembly, a plurality of groups of tray assemblies arranged along the length direction of the lifting chains, pins respectively arranged at the front and back sides of the tray assemblies and arranged on the same side chain of the two groups of lifting chains, a feeding conveyor arranged at one side of the lower end of the frame, a selective discharging conveyor arranged in the frame and arranged on the moving path of the downward movement of the tray assemblies, an opening arranged on the tray assembly and through which the conveying belt of the feeding conveyor or the selective discharging conveyor passes, and a subsequent conveying device arranged at the output end of the selective discharging conveyor. The step-by-step elevator and the lifting method thereof can automatically transfer the curved blocks to the required storage floor, and improve the transfer efficiency of the curved blocks.

Description

Technical Field

[0001] This invention relates to the field of lifting equipment, and in particular to a stepping stone hoist and its lifting method. Background Technology

[0002] In the liquor industry, with the increasing consumption of liquor, the output of koji (fermentation starter) has become a significant factor restricting production efficiency. Koji-making workshops have become a popular trend, with automated production lines making full use of the workshop space. From raw material input, purification, moistening, grinding, and pressing of koji, to fermentation and storage of koji blocks, everything can be concentrated in one intensive plant, effectively saving land resources and transportation costs. However, sometimes, moving koji blocks across floors is not very easy, still requiring manual labor using transport vehicles, and the transfer efficiency is not high, hindering further increases in koji production capacity.

[0003] CN212100626U discloses a stepping continuous elevator that can lift materials up and down, but the material feeding and unloading require a separate pushing mechanism, which affects the continuity of material lifting, reduces lifting efficiency, and has a complex structure. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a stepper elevator and its lifting method, which can automatically transfer curved blocks to the floor where they are to be stored, thereby improving the efficiency of curved block transfer.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is as follows: a stepping elevator, including a frame, a driving component at the top of the frame, a passive component at the bottom, two sets of ring-shaped lifting chains between the driving component and the passive component, the two sets of lifting chains being arranged in parallel and staggered, multiple sets of pallet assemblies being arranged along the length of the lifting chains, the front and rear sides of the pallet assemblies being respectively mounted on the same side of the two sets of lifting chains via pins, a feeding conveyor being provided on one side of the lower end of the frame, a selective discharge conveyor being provided inside the frame, the selective discharge conveyor being arranged on the downward moving path of the pallet assemblies, the pallet assemblies being provided with openings for the conveyor belts of the feeding conveyor or the selective discharge conveyor to pass through, and a subsequent conveying device being provided at the output end of the selective discharge conveyor.

[0006] In a preferred embodiment, both the feeding conveyor and the selective discharge conveyor are provided with two sets of conveyor belts, and two sets of pallet assemblies are provided corresponding to the openings of the conveyor belts of the feeding conveyor or the selective discharge conveyor, forming an "E" shaped structure.

[0007] In a preferred embodiment, the drive assembly includes a bracket, a reducer, and a synchronous gearbox. The drive shaft is connected to the output end of the reducer and the input end of the synchronous gearbox, respectively. Both the output ends of the drive shaft and the synchronous gearbox are equipped with drive sprockets. Two sets of driven sprockets are respectively mounted on two sets of drive shafts. The drive shafts are rotatably mounted on the bracket, which is fixed to the upper end of the frame. Each set of lifting chains simultaneously meshes with the drive sprocket and the driven sprocket located on the same side.

[0008] In a preferred embodiment, the passive component includes a sprocket frame with four sets of passive sprockets mounted on it. The passive sprockets are mounted on the sprocket frame via sprocket shafts, and each set of lifting chains simultaneously engages with two passive sprockets located on the same side.

[0009] In a preferred embodiment, multiple sets of selective discharge conveyors are arranged along the height direction of the lifting chain. One end of the selective discharge conveyor is hinged to the conveyor mounting frame, which is fixed on the machine frame. The cylinder is hinged to the conveyor mounting frame via a hinge support. One end of the cylinder's extension rod is hinged to a connecting rod, and the other end of the connecting rod is connected to the selective discharge conveyor. When the cylinder extends, the selective discharge conveyor is in a horizontal state; when the cylinder retracts, the selective discharge conveyor is in a nearly vertical state.

[0010] In a preferred embodiment, the pallet assembly includes a bracket, a tray plate on the bracket, an opening on the tray plate, a pin rotatably mounted on a transition member, a first hinge seat on the bracket, and the two sides of the transition member being hinged to the first hinge seat via rotating shafts.

[0011] In a preferred embodiment, the pivots on both sides of the transition member on one side of the tray assembly are rotatably mounted on the second hinge seat. The second hinge seat is located on both sides of the first hinge seat. The bottom of the first hinge seat is provided with a slider. The bracket is provided with a slide rail that cooperates with the slider. A spring is provided between the second hinge seat and the first hinge seat, and the spring is fitted on the pivot.

[0012] In a preferred embodiment, multiple sets of limiting mechanisms are provided on the frame along the length direction of the lifting chain. The limiting mechanism includes a mounting base installed on the frame, and one end of the mounting base is provided with a chain guide rail.

[0013] The present invention also provides a method for lifting materials using a stepper elevator, comprising the following steps:

[0014] Step 1: Feed and convey materials using a feeding conveyor, and stop conveying when the materials reach the predetermined position;

[0015] Step 2: Start the drive assembly to drive the lifting chain to move in a circle. The pallet assembly on the chain closest to the feeding conveyor moves upward. The opening of the pallet assembly passes through the conveyor belt of the feeding conveyor. The pallet assembly supports the material on the feeding conveyor and drives the material away from the feeding conveyor.

[0016] Step 3: The lifting chain drives the pallet assembly and materials to continue moving upward. When it reaches the upper end of the lifting chain, it turns and begins to move downward. The opening of the pallet assembly passes through the conveyor belt of the selective discharge conveyor. The conveyor belt of the selective discharge conveyor intercepts the materials and then transports the materials to subsequent conveying equipment for further transport.

[0017] Step 4: Repeat steps 1-3 to complete the material lifting and conveying.

[0018] In the preferred embodiment, in step three, when it is necessary to lift the material to a certain height, the cylinder corresponding to that height extends, so that the selected discharge conveyor at that height is in a horizontal state, thus intercepting the material. The cylinders corresponding to other heights retract, so that the selected discharge conveyor at that height is in a nearly vertical state, at which point the material can freely pass through the selected discharge conveyor at that height.

[0019] This invention provides a stepper elevator and its lifting method, wherein when the pallet assembly and the lifting chain rise synchronously,

[0020] The opening of the pallet assembly passes through the conveyor belt of the feeding conveyor. The pallet assembly supports the koji blocks on the feeding conveyor and moves them away from the feeding conveyor, achieving automatic feeding. The lifting chain drives the pallet assembly to continue moving upwards. When it reaches the upper end of the lifting chain, it turns and begins to move downwards. The opening of the pallet assembly passes through the conveyor belt of the selective discharge conveyor. The selective discharge conveyor intercepts the koji blocks, achieving automatic unloading. In other words, this device can automatically feed, lift, and unload, thus achieving continuous lifting and automatically transferring the koji blocks to the required storage floor. This improves material transfer efficiency and reduces the possibility of damage to the koji block quality during manual handling. It can greatly reduce the labor intensity of operators and reduce labor costs, which is of positive significance for improving the automation level of koji production.

[0021] Preferably, by setting cylinders, the angle of the selected discharge conveyor can be adjusted. When the curved block needs to be lifted to a certain height, the cylinder corresponding to the height extends, so that the selected discharge conveyor at that height is in a horizontal state and the curved block is intercepted. The cylinders corresponding to other heights retract, so that the selected discharge conveyor at the corresponding height is in a near-vertical state. At this time, the curved block can freely pass through the selected discharge conveyor at that height, thereby realizing the switching of the floor where the curved block is lifted. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2This is a top view of the present invention;

[0025] Figure 3 This is a schematic diagram showing the connection between the feed conveyor and the pallet assembly;

[0026] Figure 4 A schematic diagram showing the selection of the matching between the discharge conveyor and the pallet assembly;

[0027] Figure 5 This is a schematic diagram of the drive component.

[0028] Figure 6 This is a schematic diagram of the passive component.

[0029] Figure 7 This is a top view of the passive component;

[0030] Figure 8 Installation diagram for selecting the discharge conveyor;

[0031] Figure 9 This is a schematic diagram of the tray assembly structure;

[0032] Figure 10 for Figure 9 Enlarged view of point A in the middle;

[0033] Figure 11 This is a schematic diagram of the limiting mechanism;

[0034] In the diagram: 1. Frame; 2. Drive assembly; 3. Passive assembly; 4. Lifting chain; 5. Pallet assembly; 6. Pin; 7. Feed conveyor; 8. Selective discharge conveyor; 9. Subsequent conveying equipment; 10. Conveyor mounting frame; 11. Cylinder; 12. Hinge support; 13. Connecting rod; 14. Mounting seat; 15. Chain guide rail; 201. Bracket; 202. Reducer; 203. Synchronous gearbox; 204. Drive shaft; 205. Drive sprocket; 206. Drive shaft; 207. Sprocket frame; 301. Passive sprocket; 302. Sprocket shaft; 303. Opening; 501. Bracket; 502. Pallet; 503. Transition piece; 504. First hinge; 505. Rotating shaft; 506. Second hinge; 507. Slider; 508. Slide rail; 509. Spring; 510. Detailed Implementation

[0035] like Figures 1-4 As shown, a stepper elevator includes a frame 1. The frame 1 has a drive assembly 2 at the top and a passive assembly 3 at the bottom. Two sets of ring-shaped lifting chains 4 are arranged between the drive assembly 2 and the passive assembly 3. The two sets of lifting chains 4 are arranged in parallel and staggered. Multiple sets of pallet assemblies 5 are arranged along the length of the lifting chains 4. The front and rear sides of the pallet assemblies 5 are respectively mounted on the same side of the two sets of lifting chains 4 by pins 6. The pins 6 are staggered on the front and rear sides of the pallet assemblies 5.

[0036] A feeding conveyor 7 is provided on one side of the lower end of the frame 1. Multiple sets of feeding conveyors 7 can be set along the height to realize multiple feeding points. A selective discharge conveyor 8 is provided inside the frame 1. The feeding conveyor 7 and the selective discharge conveyor 8 are installed on the frame 1. The feeding conveyor 7 is set on the upward moving path of the pallet assembly 5, and the selective discharge conveyor 8 is set on the downward moving path of the pallet assembly 5. The pallet assembly 5 is provided with an opening 501 for the conveyor belt of the feeding conveyor 7 or the selective discharge conveyor 8 to pass through. The output end of the selective discharge conveyor 8 is provided with a subsequent conveying device 9.

[0037] Preferably, both the feeding conveyor 7 and the selective discharge conveyor 8 are equipped with two sets of conveyor belts, which move synchronously. Two sets of pallet assemblies 5 are provided corresponding to the openings 501 of the conveyor belts of either the feeding conveyor 7 or the selective discharge conveyor 8, forming an "E" shape. By configuring the feeding conveyor 7 and the selective discharge conveyor 8 with two sets of conveyor belts, the material support capacity is improved. Simultaneously, when transferring materials onto the "E"-shaped pallet assembly 5, the stability of the pallet assembly 5 in supporting the materials is enhanced.

[0038] Preferred, such as Figure 5 As shown, the drive assembly 2 includes a bracket 201, a reducer 202, and a synchronous gearbox 203. The drive shaft 204 is connected to the output end of the reducer 202 and the input end of the synchronous gearbox 203, respectively. The output ends of the drive shaft 204 and the synchronous gearbox 203 are each provided with a drive sprocket 205. Two sets of driven sprockets 206 are respectively mounted on two sets of drive shafts 207. The drive shafts 207 are rotatably mounted on the bracket 201. The bracket 201 is fixed to the upper end of the frame 1. Each set of lifting chains 4 simultaneously meshes with the drive sprocket 205 and the driven sprocket 206 located on the same side.

[0039] The driving sprocket 205 and the driven sprocket 206 on the same side are located on the same line and are called the same set of sprockets. The two sets of sprockets are set in parallel and staggered, and the staggered distance between the driving sprockets 205 is equal to the staggered distance between the driven sprockets 206.

[0040] The reducer 202 drives the drive shaft 204 to rotate and the gears in the synchronous gearbox 203 to rotate, thereby achieving synchronous rotation of the drive sprocket 205.

[0041] To ensure the synchronization of the two sets of lifting chains, a synchronous gearbox 203 is used to transmit power under the premise of a single drive. This ensures that the linear velocity, angular velocity and phase of the drive sprockets of the two sets of lifting chains 4 are consistent and synchronized. It also has high transmission efficiency and good stability, and can effectively suppress the disturbance generated by the two sets of long-distance lifting chains during operation from being amplified to the drive end and affecting the stability of the drive components.

[0042] Preferred, such as Figures 6-7As shown, the passive assembly 3 includes a sprocket frame 301, on which four sets of passive sprockets 302 are mounted. The distance between two sets of passive sprockets 302 on the same side is equal to the distance between two sets of passive sprockets 302 on the other side, and the passive sprockets 302 on one side are parallel and staggered from those on the other side. The passive sprockets 302 are mounted on the sprocket frame 301 via sprocket shafts 303 and rotate along the sprocket shafts 303. Each set of lifting chains 4 simultaneously engages with two passive sprockets 302 on the same side.

[0043] In practical use, a tensioning device can be installed on the frame 1, and the position of the passive component 3 can be adjusted up and down to effectively tension the lifting chain 4.

[0044] Preferred, such as Figure 8 As shown, multiple sets of selective discharge conveyors 8 are arranged along the height direction of the lifting chain 4. The installation position of the selective discharge conveyor 8 can be set according to the required lifting height. One end of the selective discharge conveyor 8 is hinged to the conveyor mounting frame 10, which is fixed on the frame 1. The cylinder 11 is hinged to the conveyor mounting frame 10 through the hinge support 12. The telescopic rod of the cylinder 11 is hinged to one end of the connecting rod 13, and the other end of the connecting rod 13 is connected to the selective discharge conveyor 8. When the cylinder 11 extends, the selective discharge conveyor 8 is in a horizontal state; when the cylinder 11 retracts, the selective discharge conveyor 8 is in a nearly vertical state.

[0045] When materials need to be lifted to a certain height, the cylinder 11 corresponding to that height extends, making the selective discharge conveyor 8 at that height horizontal and intercepting the material. The cylinders 11 corresponding to other heights retract, making the corresponding selective discharge conveyor 8 nearly vertical, allowing materials to pass freely through that height's selective discharge conveyor 8. This achieves multi-height discharge, facilitating the lifting of materials to different heights.

[0046] Preferred, such as Figure 9 As shown, the tray assembly 5 includes a bracket 502, on which a tray 503 is provided. An opening 501 is located on one side of the tray 503. Two sets of pins 6 are rotatably mounted on corresponding transition members 504. A first hinge seat 505 is provided on the bracket 502. The two sides of the transition member 504 are hinged to the first hinge seat 505 via rotating shafts 506. The transition member 504 and the first hinge seat 505 are positioned corresponding to the two sets of pins 6, and the transition member 504 can rotate slightly along the rotating shaft 506.

[0047] Furthermore, such as Figure 10As shown, the pivots 506 on both sides of the transition piece 504 on one side of the tray assembly 5 are rotatably mounted on the second hinge seat 507. Two second hinge seats 507 are provided, respectively on both sides of the first hinge seat 505. The bottom of the first hinge seat 505 is provided with a slider 508. The bracket 502 is provided with a slide rail 509 that cooperates with the slider 508. A spring 510 is provided between the second hinge seat 507 and the first hinge seat 505. The spring 510 is a compression spring and is fitted on the pivot 506.

[0048] Under the action of slider 508 and spring 510, tray assembly 5 can move slightly left and right relative to pin 6.

[0049] The pallet assembly is hinged to the lifting chain 4 using a pin 6. The pin 6 is not directly hinged to the pallet. Instead, the pin 6 is connected to the pallet through a transition piece 504. This connection ensures that the pallet can achieve overall leveling and centering under various conditions through small displacements or angular displacements. When the chain is worn or the chain installation error cannot be adjusted, the pallet assembly 5 can automatically adjust and reset, reducing the difficulty of installation and maintenance.

[0050] Preferred, such as Figure 11 As shown, multiple sets of limiting mechanisms are arranged on the frame 1 along the length of the lifting chain 4. The limiting mechanism includes a mounting base 14 installed on the frame 1, and a chain guide rail 15 is provided at one end of the mounting base 14. The chain guide rail 15 cooperates with the lifting chain 4 to constrain the movement of the lifting chain 4 in directions other than the vertical direction. The chain guide rail 15 is made of ultra-high molecular weight engineering plastic, which is wear-resistant and has low resistance.

[0051] A method for lifting material using a stepper elevator includes the following steps:

[0052] Step 1: Multiple sets of feeding conveyor 7 can be set along the height. The curved blocks are transported to the feeding conveyor 7 by other conveying equipment for horizontal transport. The feeding conveyor 7 feeds the curved blocks and stops transporting them when they reach the predetermined position. In actual use, sensors can be installed on the feeding conveyor 7 to detect the position information of the curved blocks in real time.

[0053] Step 2: Start the drive assembly 2, which drives the lifting chain 4 to move in a circular motion. The pallet assembly 5 on the chain of the lifting chain 4 near the feed conveyor 7 moves upward. The opening 501 of the pallet assembly 5 passes through the conveyor belt of the feed conveyor 7. The pallet assembly 5 supports the curved block on the feed conveyor 7 and drives the curved block away from the feed conveyor 7.

[0054] Step 3: The lifting chain 4 drives the pallet assembly 5 and the curved block to continue moving upward. When it reaches the upper end of the lifting chain 4, it turns and begins to move downward. The opening 501 of the pallet assembly 5 passes through the conveyor belt of the selective discharge conveyor 8. The conveyor belt of the selective discharge conveyor 8 intercepts the curved block and the selective discharge conveyor 8 transports the curved block to the subsequent conveying equipment 9 for subsequent transport.

[0055] When the curved block needs to be lifted to a certain height, the cylinder 11 corresponding to that height extends, so that the selective discharge conveyor 8 at that height is in a horizontal state and the curved block is intercepted. The cylinders 11 corresponding to other heights retract, so that the selective discharge conveyor 8 at the corresponding height is in a nearly vertical state. At this time, the curved block can freely pass through the selective discharge conveyor 8 at that height.

[0056] Step 4: Repeat steps 1-3 to complete the lifting and conveying of the curved blocks.

Claims

1. A step elevator comprising a frame (1), characterized in that: The rack (1) is provided with a driving assembly (2) at the top and a passive assembly (3) at the bottom, two groups of annular lifting chains (4) are arranged between the driving assembly (2) and the passive assembly (3), the two groups of lifting chains (4) are arranged in parallel and staggered, a plurality of tray assemblies (5) are arranged along the length direction of the lifting chain (4), the front and rear sides of the tray assembly (5) are respectively installed on the same side chain of the two groups of lifting chains (4) through a pin shaft (6), and the pin shaft (6) is arranged in a staggered manner on the front and rear sides of the tray assembly (5); a feeding conveyor (7) is arranged at one side of the lower end of the rack (1), a selection discharge conveyor (8) is arranged in the rack (1), the selection discharge conveyor (8) is arranged on the moving path of the tray assembly (5) moving downward, the tray assembly (5) is provided with an opening (501) through which the conveying belt of the feeding conveyor (7) or the selection discharge conveyor (8) passes, and the output end of the selection discharge conveyor (8) is provided with a subsequent conveying device (9). The tray assembly (5) comprises a bracket (502), the bracket (502) is provided with a supporting plate (503), the opening (501) is arranged on the supporting plate (503), the pin shaft (6) is rotatably installed on a transition piece (504), the bracket (502) is provided with a first hinge seat (505), the transition piece (504) is hingedly connected to the first hinge seat (505) through a rotating shaft (506) at both sides, the pin shaft (6) is connected to the tray assembly (5) through the transition piece (504), so that the tray assembly (5) can realize overall horizontal and centering through displacement or angular displacement in various states; the rotating shaft (506) at both sides of the transition piece (504) at one side of the tray assembly (5) is rotatably installed on a second hinge seat (507), the second hinge seat (507) is arranged at both sides of the first hinge seat (505), the first hinge seat (505) is provided with a sliding block (508), the bracket (502) is provided with a sliding rail (509) matched with the sliding block (508), and a spring (510) is arranged between the second hinge seat (507) and the first hinge seat (505), and the spring (510) is sleeved on the rotating shaft (506).

2. A step elevator as claimed in claim 1, characterized in that The feeding conveyor (7) and the selection discharge conveyor (8) are each provided with two groups of conveying belts, the tray assembly (5) is provided with two groups of openings (501) corresponding to the conveying belts of the feeding conveyor (7) or the selection discharge conveyor (8), and the tray assembly (5) forms an "E" shaped structure.

3. A step elevator as claimed in claim 1, characterized in that: The driving assembly (2) comprises a support (201), a speed reducer (202) and a synchronous gear box (203), a driving shaft (204) is connected to the output end of the speed reducer (202) and the input end of the synchronous gear box (203) respectively, the driving shaft (204) and the output end of the synchronous gear box (203) are provided with driving sprockets (205), two groups of driven sprockets (206) are arranged on two groups of driven shafts (207), the driven shafts (207) are rotatably installed on the support (201), the support (201) is fixed on the upper end of the rack (1), and each group of lifting chains (4) is meshed with the driving sprocket (205) and the driven sprocket (206) arranged on the same side.

4. A step elevator as claimed in claim 1, characterized in that: The passive assembly (3) comprises a sprocket frame (301) provided with four groups of passive sprockets (302), the passive sprockets (302) are installed on the sprocket frame (301) through sprocket shafts (303), and each group of lifting chains (4) is engaged with two passive sprockets (302) located on the same side.

5. A step elevator as claimed in claim 1, characterized in that: The selection discharge conveyor (8) is provided with multiple groups along the height direction of the lifting chain (4), one end of the selection discharge conveyor (8) is hinged to the conveyor mounting frame (10), the conveyor mounting frame (10) is fixed on the rack (1), the air cylinder (11) is hinged to the conveyor mounting frame (10) through the hinge support (12), the extension rod of the air cylinder (11) is hinged to one end of the connecting rod (13), the other end of the connecting rod (13) is connected with the selection discharge conveyor (8), when the air cylinder (11) is extended, the selection discharge conveyor (8) is in a horizontal state; when the air cylinder (11) is retracted, the selection discharge conveyor (8) is in a vertical state.

6. A step elevator as claimed in claim 1, characterized in that: Multiple groups of limiting mechanisms are arranged on the rack (1) along the length direction of the lifting chain (4), and the limiting mechanism comprises a mounting seat (14) mounted on the rack (1), and one end of the mounting seat (14) is provided with a chain guide rail (15).

7. A method of hoisting material using a step-lift according to any one of claims 1 to 6, characterised in that, The method comprises the following steps: Step one, feeding and conveying the material through the feeding conveyor (7), and stopping conveying when reaching the predetermined position; Step two, starting the driving assembly (2) to drive the lifting chain (4) to move in a loop, the lifting chain (4) moves upward relative to the tray assembly (5) on the chain on the side of the feeding conveyor (7), the opening (501) of the tray assembly (5) passes through the conveying belt of the feeding conveyor (7), the tray assembly (5) supports the material on the feeding conveyor (7) and carries the material away from the feeding conveyor (7); Step three, the lifting chain (4) drives the tray assembly (5) and the material to continue moving upward, and turns at the upper end of the lifting chain (4) to start moving downward, the opening (501) of the tray assembly (5) passes through the conveying belt of the selection discharge conveyor (8), the conveying belt of the selection discharge conveyor (8) intercepts the material, and the selection discharge conveyor (8) conveys the material to the subsequent conveying equipment (9) for subsequent conveying; Step four, repeating steps one to three to complete the lifting and conveying of the material.

8. A method of lifting material with a step-lift according to claim 7, characterized in that, In step three, when the material needs to be lifted to a certain height, the air cylinder (11) corresponding to the height is extended, so that the selection discharge conveyor (8) at the height is in a horizontal state to intercept the material, and the air cylinders (11) corresponding to other heights are retracted, so that the selection discharge conveyors (8) corresponding to the heights are in a vertical state, at this time, the material can pass through the selection discharge conveyor (8) at the height freely.

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