Discharging platform

Abstract

The unloading platform comprises a trolley structure, a sliding rail structure and a door opening and closing structure, the sliding rail structure comprises two sliding rails, sliding rail adjusting screw rods and a driving structure, the two sides of the trolley structure are slidably arranged on the sliding rails correspondingly, the front ends and the rear ends of the sliding rails are connected with the sliding rail adjusting screw rods correspondingly, and the driving structure is used for being connected with and driving the trolley structure; the door opening and closing structure comprises supporting rods, a rotary drum, a plurality of door leaves and a second motor, the supporting rods are symmetrically and vertically arranged on the sliding rails respectively, sliding grooves are formed in the opposite sides of the two supporting rods respectively, connecting rods are arranged at the upper ends of the supporting rods respectively, and the door leaves movably connected with one another are wound on the rotary drum between the connecting rods; the two sides of the gate leaf located at the innermost end are fixedly connected with the rotary drum, the two sides of each gate leaf are each provided with a guide sliding block which can be clamped in the corresponding sliding groove in a sliding mode from an opening in the upper end of the corresponding sliding groove, and the second motor is used for driving the rotary drum to rotate and driving the multiple gate leaves to move along the sliding grooves. Through the arrangement of the door opening and closing structure, the opening of the wall body can be shielded according to needs.

Description

Technical Field

[0001] The present invention relates to the technical field of devices for building construction, and particularly relates to a discharging platform. Background Art

[0002] Common discharging platforms mainly include mobile discharging platforms, floor-standing discharging platforms, and cantilever discharging platforms. These discharging platforms are used for the turnover of materials between the ground and floors, and between floors at the construction site, and have different characteristics and application scenarios.

[0003] The cantilever discharging platform is one of the commonly used types at the construction site. It is usually welded into a main frame with No. 18, No. 14, and No. 12 channel steels. One end of it is placed on the floor slab inside the building, and the other end passes out of the building through the opening in the wall, and is suspended outside the floor slab with steel wires, forming a cantilever discharging platform. The platform is usually anchored 1 meter into the building, and the maximum allowable load is about 1 ton. The advantages of the cantilever discharging platform are convenient installation and displacement, and high turnover rate, which is suitable for material transfer in multi-storey building construction.

[0004] However, the conventional cantilever discharging platform does not have a shielding function for the opening in the building wall. When there is no need to transport materials and the platform trolley is inside the building, or when materials are transported outside the building through the platform trolley, the opening in the wall where the discharging platform is installed is in an open state, which undoubtedly increases the danger of construction workers during the construction process.

[0005] Therefore, there is an urgent need for a discharging platform to solve the problem that the conventional cantilever discharging platform cannot protect the opening in the building wall where the discharging platform is installed. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the present invention provides a discharging platform to solve the problem that the conventional cantilever discharging platform cannot protect the opening in the building wall where the discharging platform is installed.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A discharging platform, characterized in that: it includes a trolley structure, a slide rail structure and a door opening and closing structure. The slide rail structure includes two parallel slide rails, slide rail adjusting screws and a driving structure. The two sides of the trolley structure for stacking materials are respectively slidably arranged on the two slide rails on both sides. The front and rear ends of the two slide rails on both sides are respectively connected with slide rail adjusting screws. The driving structure is used to connect and drive the trolley structure to move back and forth along the slide rails. The door opening and closing structure includes two support rods, a rotating cylinder, several door leaves and a second motor. One support rod is vertically arranged symmetrically on each of the two slide rails. Vertical chutes are respectively arranged on the opposite sides of the two support rods, and connecting rods for installing the rotating cylinder are arranged at the upper ends. Several mutually movably connected door leaves are wound on the rotating cylinder arranged between the two connecting rods. The two sides of the innermost door leaf are fixedly connected to the rotating cylinder. Guide sliders that can be slidably clamped in the chutes from the openings at the upper ends of the chutes are arranged on both sides of each door leaf. The second motor is used to drive the rotating cylinder to rotate, and drive several door leaves to be wound upward on the surface of the rotating cylinder, or drive several door leaves to move downward along the chutes one by one with the outermost door leaf to block between the two support rods.

[0009] To optimize the above technical solution, the specific measures taken also include:

[0010] Further, the driving structure includes a coaxial reverse driving mechanism, a first driving steel wire rope, a second driving steel wire rope, a front guide wheel and a rear guide wheel. The front guide wheel and the rear guide wheel are respectively installed on the two slide rail adjusting screws at the front and rear ends. The coaxial reverse driving mechanism is respectively connected to the first driving steel wire rope and the second driving steel wire rope. The first driving steel wire rope bypasses the rear guide wheel and is connected to the rear end of the trolley structure. The second driving steel wire rope bypasses the front guide wheel and is connected to the front end of the trolley structure. The coaxial reverse driving mechanism is used to drive the first driving steel wire rope and the second driving steel wire rope to move synchronously and reversely, and drive the trolley structure to move back and forth.

[0011] Further, the coaxial reverse drive mechanism includes a first motor, an output bevel gear, a first driven bevel gear, a second driven bevel gear, a first reel, a second reel and a mounting bracket. The mounting bracket is used to be mounted on the floor slab. The first reel and the second reel are symmetrically mounted on the left and right coaxially on the mounting bracket. The first reel and the second reel are respectively used for winding the second driving steel wire rope or the first driving steel wire rope. The first driven bevel gear and the second driven bevel gear are respectively mounted on the adjacent ends of the first reel and the second reel. A first motor is further provided on the mounting bracket. The output end of the first motor is connected to the output bevel gear. The output bevel gear meshes with the first driven bevel gear and the second driven bevel gear at the same time. The first motor is used to drive the output bevel gear to rotate, so as to drive the first driven bevel gear and the second driven bevel gear to rotate in opposite directions, and drive the corresponding first reel and the second reel to synchronously wind and unwind the second driving steel wire rope and the first driving steel wire rope in opposite directions.

[0012] Further, the front and rear ends of the two slide rails are respectively movably connected to the slide rail adjusting screw rods. The two slide rails can move closer to or away from each other in the left-right direction. The trolley structure includes a left trolley body and a right trolley body. The left trolley body and the right trolley body are symmetrically divided from a rectangular column structure with an assembly groove for stacking materials in the middle along the center of the edge. And on the side of the left trolley body close to the right trolley body, there is a trolley chute with a vertical cross-section in the shape of "concave", and on the side of the right trolley body close to the left trolley body, there is a trolley plug that can be correspondingly inserted into the trolley chute; The door leaf includes a first door leaf and a second door leaf. The rotating cylinder includes a first rotating cylinder and a second rotating cylinder. A second motor is mounted on the connecting rod on one side. The output shaft of the second motor can rotatably pass through the connecting rod and is connected to one end of the first rotating cylinder. The other end of the first rotating cylinder is provided with a convex block for limiting and inserting into one end of the second rotating cylinder. After the insertion, the first rotating cylinder and the second rotating cylinder can move closer to or away from each other. The other end of the second rotating cylinder is rotatably mounted on the connecting rod on the other side through a rotating shaft. The first door leaf and the second door leaf are mutually limited and inserted to form a door leaf, and the first door leaf and the second door leaf can only move closer to or away from each other. The two ends of the first door leaf and the second door leaf of the door leaf located at the innermost end, which are far away from each other, are respectively fixed to the two ends of the first rotating cylinder and the second rotating cylinder, which are far away from each other. The two ends of the first door leaf and the second door leaf of each door leaf, which are far away from each other, are respectively provided with the guiding sliders. Adjacent door leaves are connected by a traction rope to connect the heads and tails of the adjacent guiding sliders on the same side.

[0013] Further, the two ends of the first door leaf and the second door leaf of the door leaf located at the outermost end, which are far away from each other, are respectively provided with guiding pulleys, and the guiding pulleys are always slidably arranged in the chute.

[0014] Further, external threads are provided at both ends of the slide rail adjusting screw. The two ends of the slide rail adjusting screw are respectively slidably inserted and connected to the slide rails on both sides, and slide rail adjusting nuts are screwed onto the two ends of the slide rail adjusting screw to limit the relative positions of the slide rails on both sides on the slide rail adjusting screw.

[0015] Further, a regulating frame is symmetrically provided at the lower end of each of the left trolley body and the right trolley body. A trolley adjusting screw is commonly screwed between the two regulating frames. The trolley adjusting screw is used for rotation to drive the two regulating frames to drive the left trolley body and the right trolley body to move closer to or away from each other.

[0016] Further, the upper end face of the inner side of the assembly groove is a slope.

[0017] Further, chamfers in a flared shape are provided at the lower ends of the guiding sliders, and flared openings for guiding the guiding sliders are provided at the upper ends of the sliding grooves.

[0018] Further, a circle of guardrails is provided around the upper periphery of the trolley structure.

[0019] The beneficial effects of the present invention are as follows:

[0020] Through the arrangement of the trolley structure and the slide rail structure, the present invention can use the driving structure to drive the trolley structure to move back and forth in the front-back direction of the inside and outside of the building along the slide rail of the slide rail structure, so as to realize the handling of materials; through the opening and closing door structure provided on the slide rail, the rotating cylinder can be driven as required, and several door leaves can be driven to wind up on the surface of the rotating cylinder upward. At this time, the wall opening is open, and the trolley structure can freely enter and exit. Or, the outermost door leaf can pull several door leaves to slide and engage in the sliding groove one by one, and move downward along the sliding groove to block between the two support rods. At this time, the wall opening is blocked by several door leaves, thereby increasing the safety when the trolley structure is not in use, and solving the problem that the conventional cantilever type unloading platform cannot protect the wall opening where the unloading platform is installed. Description of the Drawings

[0021] Figure 1 is a schematic diagram of the overall structure of a kind of unloading platform proposed by the present invention Figure 1 ;

[0022] Figure 2 is a schematic diagram of the overall structure of a kind of unloading platform proposed by the present invention Figure 2 ;

[0023] Figure 3 is a schematic diagram of the slide rail structure of a kind of unloading platform proposed by the present invention;

[0024] Figure 4 is a cross-sectional view of a coaxial reverse drive mechanism of a kind of unloading platform proposed by the present invention;

[0025] Figure 5 A cross-sectional view of the trolley structure of a discharging platform proposed by the present invention;

[0026] Figure 6 A cross-sectional view of the rotary drum of a discharging platform proposed by the present invention;

[0027] Figure 7 Schematic of the opening and closing door structure of a discharging platform proposed by the present invention Figure 1 ;

[0028] Figure 8 Schematic of the opening and closing door structure of a discharging platform proposed by the present invention Figure 2 ;

[0029] Figure 9 A cross-sectional view of the opening and closing door structure of a discharging platform proposed by the present invention.

[0030] Reference numerals: 1. trolley structure, 11. left trolley body, 12. right trolley body, 13. trolley chute, 14. trolley insert block, 15. connecting frame, 16. roller, 17. adjusting frame, 18. trolley adjusting screw, 19. rope connecting block, 2. slide rail structure, 21. slide rail, 22. slide rail adjusting screw, 23. slide rail adjusting nut, 24. front guide wheel, 25. rear guide wheel, 26. first driving steel wire rope, 27. second driving steel wire rope, 28. coaxial reverse driving mechanism, 281. first motor, 282. output bevel gear, 283. first drum, 284. first driven bevel gear, 285. second driven bevel gear, 286. second drum, 287. mounting frame, 3. opening and closing door structure, 31. support rod, 32. connecting rod, 33. second motor, 34. rotary drum, 341. first rotary drum, 342. second rotary drum, 343. output shaft, 344. rotating shaft, 35. first door leaf, 36. second door leaf, 37. guide slider, 38. guide pulley. Detailed implementation manners

[0031] Now, the present invention will be further described in detail with reference to the accompanying drawings.

[0032] As shown in the attached Figure 1 and attached Figure 2As shown in the figure, a discharging platform according to an embodiment of the present invention includes a trolley structure 1, a slide rail structure 2, and an opening and closing door structure 3. The slide rail structure 2 includes two parallel slide rails 21, a slide rail adjusting screw 22, and a driving structure. The two sides of the trolley structure 1 for stacking materials are respectively slidably arranged on the two slide rails 21 on both sides. The front and rear ends of the two slide rails 21 on both sides are respectively connected with a slide rail adjusting screw 22. The driving structure is used to connect and drive the trolley structure 1 to move back and forth along the slide rail 21. The opening and closing door structure 3 includes two support rods 31, a rotating cylinder 34, several door leaves, and a second motor 33. One support rod 31 is vertically arranged symmetrically on each of the two slide rails 21 and on both sides of the trolley structure 1. Vertical chutes are respectively opened on the opposite sides of the two support rods 31, and connecting rods 32 for jointly installing the rotating cylinder 34 are provided at the upper ends. A rotating cylinder 34 arranged between the two connecting rods 32 is wound with several mutually movably connected door leaves. The two sides of the innermost door leaf are fixedly connected to the rotating cylinder 34. Guide sliders 37 that can be slidably clamped in the chutes from the openings at the upper ends of the chutes are provided on both sides of each door leaf. The second motor 33 is used to drive the rotating cylinder 34 to rotate, and drive several door leaves to be wound upward on the surface of the rotating cylinder 34, or drive several door leaves to move downward along the chutes one by one with the outermost door leaf to block between the two support rods 31.

[0033] Through the arrangement of the trolley structure 1 and the slide rail structure 2 in the present invention, the driving structure can be used to drive the trolley structure 1 to move back and forth in the inside and outside directions of the building along the slide rail 21 of the slide rail structure 2, so as to realize the handling of materials. Through the opening and closing door structure 3 arranged on the slide rail 21, the rotating cylinder 34 can be driven to rotate as needed, and several door leaves can be driven to be wound upward on the surface of the rotating cylinder 34. At this time, the wall opening is open, and the trolley structure 1 can freely enter and exit. Or, several door leaves are pulled by the outermost door leaf and are slidably clamped in the chutes one by one, and move downward along the chutes to block between the two support rods 31. At this time, the wall opening is blocked by several door leaves, thereby increasing the safety when the trolley structure 1 is not in use, and solving the problem that the conventional cantilever discharging platform cannot protect the wall opening where the discharging platform is installed.

[0034] In this solution, several rollers 16 connected by a connecting frame 15 can be respectively arranged in an array on the left and right sides at the lower end of the trolley structure 1. The side cross-section of the roller 16 is in a "convex" shape, and the "convex" shaped roller 16 is used to support and abut against the upper side edge of the slide rail 21, so as to facilitate the assembly and adjustment of the trolley structure 1.

[0035] As shown in the appendix Figure 3As shown in the figure, in another specific embodiment based on the above, the driving structure includes a coaxial reverse driving mechanism 28, a first driving steel wire rope 26, a second driving steel wire rope 27, a front guide pulley 24 and a rear guide pulley 25. The front guide pulley 24 and the rear guide pulley 25 are respectively installed on two slide rail adjusting screws 22 at the front and rear ends. The coaxial reverse driving mechanism 28 is respectively connected to the first driving steel wire rope 26 and the second driving steel wire rope 27. The first driving steel wire rope 26 bypasses the rear guide pulley 25 and is connected to the rear end of the trolley structure 1, and the second driving steel wire rope 27 bypasses the front guide pulley 24 and is connected to the front end of the trolley structure 1. The coaxial reverse driving mechanism 28 is used to drive the first driving steel wire rope 26 and the second driving steel wire rope 27 to move synchronously and in opposite directions, and drive the trolley structure 1 to move back and forth.

[0036] In this way, the device can be conveniently driven by devices such as the coaxial reverse driving mechanism 28, the first driving steel wire rope 26, the second driving steel wire rope 27, the front guide pulley 24 and the rear guide pulley 25. At the same time, the setting of the first driving steel wire rope 26 and the second driving steel wire rope 27 can effectively reduce the influence of complex working conditions or gravel.

[0037] As shown in the attached Figure 4 figure, among them, the above-mentioned coaxial reverse driving mechanism 28 includes a first motor 281, an output bevel gear 282, a first driven bevel gear 284, a second driven bevel gear 285, a first drum 283, a second drum 286 and a mounting bracket 287. The mounting bracket 287 is used to be installed on the floor slab. The first drum 283 and the second drum 286 are coaxially and symmetrically installed on the left and right of the mounting bracket 287. The first drum 283 and the second drum 286 are respectively used to wind up the second driving steel wire rope 27 or the first driving steel wire rope 26. The adjacent ends of the first drum 283 and the second drum 286 are respectively installed with the first driven bevel gear 284 and the second driven bevel gear 285. The mounting bracket 287 is also provided with a first motor 281. The output end of the first motor 281 is connected to the output bevel gear 282. The output bevel gear 282 meshes with the first driven bevel gear 284 and the second driven bevel gear 285 at the same time. The first motor 281 is used to drive the output bevel gear 282 to rotate, so as to drive the first driven bevel gear 284 and the second driven bevel gear 285 to rotate in opposite directions, and drive the corresponding first drum 283 and the second drum 286 to synchronously wind up and release the second driving steel wire rope 27 and the first driving steel wire rope 26 in opposite directions.

[0038] Therefore, during use, the first motor 281 can be driven to rotate the output bevel gear 282, and synchronously drive the first driven bevel gear 284 and the second driven bevel gear 285 to rotate in opposite directions. Thus, the first driven bevel gear 284 and the second driven bevel gear 285 rotating in opposite directions are respectively used to drive the first reel 283 and the second reel 286 to rotate in opposite directions. Therefore, when the first reel 283 winds up the second driving steel wire rope 27, the second reel 286 pays out the first driving steel wire rope 26, and the trolley structure 1 moves forward. When the first reel 283 pays out the second driving steel wire rope 27, the second reel 286 winds up the first driving steel wire rope 26, and the trolley structure 1 moves backward.

[0039] As shown in the Figure 5 , Figure 6 and Figure 7 figures, in another specific embodiment based on the above, the front and rear ends of the two slide rails 21 are respectively movably connected to the slide rail adjusting screw 22. The two slide rails 21 can move closer to or away from each other in the left-right direction. The trolley structure 1 includes a left trolley body 11 and a right trolley body 12. The left trolley body 11 and the right trolley body 12 are symmetrically divided from a rectangular column structure with an assembly groove for stacking materials in the middle along the center of the edge. And on the side of the left trolley body 11 close to the right trolley body 12, there is a trolley chute 13 with a vertical cross-section in the shape of "concave", and on the side of the right trolley body 12 close to the left trolley body 11, there is a trolley insert block 14 that can be correspondingly inserted into the trolley chute 13; the door leaf includes a first door leaf 35 and a second door leaf 36. The rotating cylinder 34 includes a first rotating cylinder 341 and a second rotating cylinder 342. A second motor 33 is installed on the connecting rod 32 on one side. The output shaft 343 of the second motor 33 rotatably passes through the connecting rod 32 and is connected to one end of the first rotating cylinder 341. The other end of the first rotating cylinder 341 is provided with a convex block for limit insertion with one end of the second rotating cylinder 342. After the insertion, the first rotating cylinder 341 and the second rotating cylinder 342 can move closer to or away from each other. The other end of the second rotating cylinder 342 is rotatably installed on the connecting rod 32 on the other side through a rotating shaft 344. The first door leaf 35 and the second door leaf 36 are mutually limit-inserted to form a door leaf, and the first door leaf 35 and the second door leaf 36 can only move closer to or away from each other. The two ends of the first door leaf 35 and the second door leaf 36 of the door leaf at the innermost end that are away from each other are respectively fixedly connected to the two ends of the first rotating cylinder 341 and the second rotating cylinder 342 that are away from each other. Guide sliders 37 are respectively provided at the ends of the first door leaf 35 and the second door leaf 36 of each door leaf that are away from each other. Adjacent door leaves are connected by connecting the head and tail of the guide sliders 37 on the same side and adjacent to each other through a traction rope.

[0040] Therefore, during use, the width of the device can be adjusted as needed according to the width of the wall opening. Specifically, through the movable connection between the two slide rails 21 and the slide rail adjustment screw 22, the distance between the two slide rails 21 can be adjusted as needed. At this time, the support rods 31 on the two slide rails 21 drive the first rotating cylinder 341 and the second rotating cylinder 342 to move closer to or away from each other respectively by means of the connecting rods 32 for corresponding adjustment. Moreover, during the adjustment of the first rotating cylinder 341 and the second rotating cylinder 342, the first door leaf 35 and the second door leaf 36 of the innermost door leaf are adjusted synchronously with the first rotating cylinder 341 and the second rotating cylinder 342. The left and right ends of the first door leaf 35 and the second door leaf 36 of the outermost door leaf can be preset in the corresponding chutes through the guide sliders 37, or manually set in the corresponding chutes after adjustment. And during subsequent use, the door leaves in the chutes pull the subsequent door leaves into the chutes one by one to complete the adjustment and use.

[0041] In this solution, the above-mentioned first rotating cylinder 341 is provided with a convex block, and the second rotating cylinder 342 is correspondingly provided with a groove that can be slidably inserted and connected with the convex block. And a limiting card slot and a limiting block can be arranged between the convex block and the groove to prevent relative rotation between them. In this solution, the above-mentioned first door leaf 35 and the second door leaf 36 can be slidably bolted through the cooperation of a clamping block and a clamping slot. As shown in the attachment Figure 8 As shown, the clamping block can be set in the structure of two cylinders or square columns, etc., to limit the movement between the first door leaf 35 and the second door leaf 36 to only move closer to or away from each other.

[0042] As shown in the attachment Figure 9 As shown, the end parts of the first door leaf 35 and the second door leaf 36 of the outermost door leaf that are away from each other are respectively provided with guide pulleys 38, and the guide pulleys 38 are always slidably arranged in the chute. Therefore, it is convenient for the outermost door leaf to pull the subsequent door leaves and ensure the stability of the use and adjustment of the door leaf structure.

[0043] Among them, both ends of the slide rail adjustment screw 22 are provided with external threads, and both ends of the slide rail adjustment screw 22 are respectively slidably inserted and connected with the slide rails 21 on both sides, and the slide rail adjustment nuts 23 are screwed on both ends of the slide rail adjustment screw 22 to limit the relative positions of the slide rails 21 on both sides on the slide rail adjustment screw 22. Therefore, it is convenient to use the slide rail adjustment screw 22 to adjust and control the use distance between the slide rails 21 on both sides.

[0044] Among them, a regulating frame 17 is symmetrically provided at the lower end of each of the left trolley body 11 and the right trolley body 12. A trolley adjustment screw 18 is commonly screwed between the two regulating frames 17. The trolley adjustment screw 18 is used to rotate and drive the two regulating frames 17 to drive the left trolley body 11 and the right trolley body 12 to move closer to or away from each other. Therefore, it is convenient to use the trolley adjustment screw 18 to adjust and control the use width of the left trolley body 11 and the right trolley body 12.

[0045] Among them, the upper end face of the inner side of the assembly groove is a slope. In this way, it is convenient to increase the stability of the material in the assembly groove after loading.

[0046] In another specific embodiment based on the above, chamfers in a flared shape are provided at the lower ends of the guiding sliders 37, and a flared opening for guiding the guiding sliders 37 is provided at the upper end of the sliding groove. In this way, it is convenient to tow the subsequent guiding sliders 37.

[0047] In another specific embodiment based on the above, a circle of guardrails is provided around the upper periphery of the trolley structure 1. In this way, the stability of the trolley structure 1 during loading and transporting materials is increased.

[0048] It should be noted that terms such as "upper", "lower", "left", "right", "front", "rear", etc. cited in the invention are only for the convenience of clear description, rather than to limit the scope of implementation of the present invention. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope of implementation of the present invention.

[0049] The above are only the preferred implementation modes of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, refinements and variations can be made to these embodiments without departing from the principle and spirit of the present invention, and should be regarded as the protection scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A discharging platform, characterized in that: It includes a trolley structure (1), a slide rail structure (2), and a door opening and closing structure (3). The slide rail structure (2) includes two parallel slide rails (21), a slide rail adjusting screw (22), and a driving structure. The two sides of the trolley structure (1) for stacking materials are respectively slidably arranged on the two side slide rails (21). The front and rear ends of the two side slide rails (21) are respectively connected to each other by a slide rail adjusting screw (22). The driving structure is used to connect and drive the trolley structure (1) to move back and forth along the slide rail (21). The door opening and closing structure (3) includes two support rods (31), a rotating cylinder (34), several door leaves, and a second motor (33). One support rod (31) is vertically arranged symmetrically on each of the two slide rails (21). Vertical chutes are respectively opened on the opposite sides of the two support rods (31), and connecting rods (32) for installing the rotating cylinder (34) are provided at the upper ends. Several mutually movably connected door leaves are wound around the rotating cylinder (34) arranged between the two connecting rods (32). The two sides of the innermost door leaf are fixedly connected to the rotating cylinder (34). Guide sliders (37) that can be slidably clamped in the chutes from the openings at the upper ends of the chutes are provided on both sides of each door leaf. The second motor (33) is used to drive the rotating cylinder (34) to rotate, and drive several door leaves to be wound upward on the surface of the rotating cylinder (34), or drive several door leaves to move downward one by one along the chutes with the outermost door leaf to block between the two support rods (31).

2. A discharging platform according to claim 1, characterized in that: The driving structure includes a coaxial reverse driving mechanism (28), a first driving steel wire rope (26), a second driving steel wire rope (27), a front guide wheel (24), and a rear guide wheel (25). The front guide wheel (24) and the rear guide wheel (25) are respectively installed on the two slide rail adjusting screws (22) at the front and rear ends. The coaxial reverse driving mechanism (28) is respectively connected to the first driving steel wire rope (26) and the second driving steel wire rope (27). The first driving steel wire rope (26) bypasses the rear guide wheel (25) and is connected to the rear end of the trolley structure (1). The second driving steel wire rope (27) bypasses the front guide wheel (24) and is connected to the front end of the trolley structure (1). The coaxial reverse driving mechanism (28) is used to drive the first driving steel wire rope (26) and the second driving steel wire rope (27) to move synchronously in the opposite direction, and drive the trolley structure (1) to move back and forth.

3. A discharging platform according to claim 2, characterized in that: The coaxial reverse drive mechanism (28) includes a first motor (281), an output bevel gear (282), a first driven bevel gear (284), a second driven bevel gear (285), a first drum (283), a second drum (286) and a mounting bracket (287). The mounting bracket (287) is used to be mounted on the floor slab. The first drum (283) and the second drum (286) are symmetrically mounted on the left and right coaxially on the mounting bracket (287). The first drum (283) and the second drum (286) are respectively used for winding the second drive steel wire rope (27) or the first drive steel wire rope (26). The adjacent ends of the first drum (283) and the second drum (286) are respectively provided with the first driven bevel gear (284) and the second driven bevel gear (285). The mounting bracket (287) is further provided with a first motor (281). The output end of the first motor (281) is connected to the output bevel gear (282). The output bevel gear (282) meshes with the first driven bevel gear (284) and the second driven bevel gear (285) simultaneously. The first motor (281) is used to drive the output bevel gear (282) to rotate, so as to drive the first driven bevel gear (284) and the second driven bevel gear (285) to rotate in opposite directions, and drive the corresponding first drum (283) and the second drum (286) to synchronously wind and unwind the second drive steel wire rope (27) and the first drive steel wire rope (26) in opposite directions.

4. A discharging platform according to claim 1, characterized in that: The front and rear ends of the two slide rails (21) are respectively movably connected to the slide rail adjusting screw rods (22). The two slide rails (21) can move closer to or away from each other in the left-right direction. The trolley structure (1) includes a left trolley body (11) and a right trolley body (12). The left trolley body (11) and the right trolley body (12) are symmetrically divided from a rectangular column structure with an assembly groove for stacking materials in the middle along the center of the edge. And on one side of the left trolley body (11) close to the right trolley body (12), there is a trolley chute (13) with a "concave" vertical cross-section. On one side of the right trolley body (12) close to the left trolley body (11), there is a trolley insert block (14) that can be correspondingly inserted into the trolley chute (13). The door leaf includes a first door leaf (35) and a second door leaf (36). The rotating cylinder (34) includes a first rotating cylinder (341) and a second rotating cylinder (342). A second motor (33) is installed on one side of the connecting rod (32). The output shaft (343) of the second motor (33) rotatably passes through the connecting rod (32) and is connected to one end of the first rotating cylinder (341). A convex block for limit plugging and connecting with one end of the second rotating cylinder (342) is provided at the other end of the first rotating cylinder (341). After plugging, the first rotating cylinder (341) and the second rotating cylinder (342) can move closer to or away from each other. The other end of the second rotating cylinder (342) is rotatably installed on the connecting rod (32) on the other side through a rotating shaft (344). The first door leaf (35) and the second door leaf (36) are mutually limit-plugged to form a door leaf, and the first door leaf (35) and the second door leaf (36) can only move closer to or away from each other. The two ends of the first door leaf (35) and the second door leaf (36) of the door leaf at the innermost end that are away from each other are respectively fixedly connected to the two ends of the first rotating cylinder (341) and the second rotating cylinder (342) that are away from each other. Guide sliders (37) are respectively provided at the ends of the first door leaf (35) and the second door leaf (36) of each door leaf that are away from each other. Adjacent door leaves are connected by connecting the head and tail of the adjacent guide sliders (37) on the same side through a towing rope.

5. A discharging platform according to claim 4, characterized in that: Guide pulleys (38) are respectively provided at the ends of the first door leaf (35) and the second door leaf (36) of the door leaf at the outermost end that are away from each other. The guide pulleys (38) are always slidably arranged in the chute.

6. The discharging platform according to claim 4, characterized in that: External threads are provided at both ends of the slide rail adjusting screw rod (22). The two ends of the slide rail adjusting screw rod (22) are respectively slidably inserted and connected to the two side slide rails (21), and slide rail adjusting nuts (23) are screwed onto the two ends of the slide rail adjusting screw rod (22) to limit the relative positions of the two side slide rails (21) on the slide rail adjusting screw rod (22).

7. A discharging platform according to claim 4, characterized in that: At the lower ends of the left trolley body (11) and the right trolley body (12), an adjusting frame (17) is symmetrically provided respectively. A trolley adjusting screw rod (18) is commonly connected by threads between the two adjusting frames (17). The trolley adjusting screw rod (18) is used for rotating and driving the two adjusting frames (17) to carry the left trolley body (11) and the right trolley body (12) to move closer to or away from each other.

8. The discharging platform according to claim 4, characterized in that: The upper end face of the inner side of the assembly groove is a slope.

9. The discharging platform according to claim 1, characterized in that: At the lower ends of the guiding sliders (37), a chamfer in a necking shape is provided, and at the upper end of the sliding groove, a flaring for guiding the guiding sliders (37) is provided.

10. A discharging platform according to claim 1, characterized in that: A circle of guardrails is provided around the periphery of the upper end of the trolley structure (1).

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