Unloading platform and unloading method for high-rise public building

Abstract

The invention relates to the technical field of building construction, and discloses a public building high-rise discharging platform and a discharging method.The public building high-rise discharging platform comprises overhanging main beams fixed to structural floor slabs, secondary beams arranged on overhanging parts of the overhanging main beams and overhanging cables arranged between the upper-layer adjacent structural floor slabs and the overhanging main beams; the carrying unit is arranged on the cantilever main beam; when the carrying plate is in a no-load state, the gravity borne by the carrying plate is smaller than the tension of the tension spring, so that the carrying plate inclines upwards relative to the horizontal plane; in the loading state, the gravity borne by the loading plate is larger than the tension of the tension spring, so that the loading plate inclines downwards relative to the horizontal plane. According to the unloading platform for the public building high-rise, the loading unit is arranged, and a loading plate automatically slides to a structural floor by means of the difference of the gravity borne by the loading plate in the no-load state and the gravity borne by the loading plate in the loading state, and automatically slides back to the overhanging part of the overhanging main beam after materials are unloaded; and construction workers are prevented from standing on the discharging platform to work, and the operation safety is improved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a high-rise unloading platform and a unloading method for public buildings. Background Art

[0002] The unloading platform of a high-rise building is a platform used to unload and temporarily store building materials during construction. It is usually located on the outside of the building and fixed to the main building through a cantilever structure. The main functions of the unloading platform include material storage, safe transportation, and space utilization. The design and installation of the unloading platform must comply with relevant safety specifications and standards to ensure its load-bearing capacity and safety, and prevent the risk of material falling and platform collapse.

[0003] An automatic lifting unloading platform includes a wall-mounted support fixed on a structural floor, a vertical guide rail unidirectionally slidably connected to the wall-mounted support, and an operating platform connected to the vertical guide rail. The wall-mounted support is detachably connected to the structural floor through a tripod, and a lifting device is connected between the lower part of the vertical guide rail and the tripod of the top-level wall-mounted support. The utility model realizes the rapid, efficient and safe turnover of construction materials, and can be installed and reused once, and has the characteristics of high safety factor, high rigidity and good stability; the utility model is easy to construct, does not occupy tower crane hoisting times, can shorten the construction period, save manpower, material resources and financial resources, and is energy-saving and environmentally friendly; the utility model has the characteristics of good resistance to deformation under force and bending, and the bearing capacity is higher than that of traditional steel cantilever unloading platforms of the same specifications.

[0004] The prior art has the following defects: The unloading platform of existing high-rise buildings is fixed on the structural floor, and the loading platform is cantilevered out of the structural floor. The building materials are hoisted onto the platform by a tower crane, and the construction workers then transfer the building materials on the unloading platform to the structural floor for the construction of this floor. Although the unloading platform has safety protection devices, there are still certain safety risks as workers frequently travel back and forth between the structural floor and the unloading platform. It is now necessary to solve the problem of workers completing the transfer of building materials on the unloading platform without leaving the structural floor to improve the safety of construction. Summary of the invention

[0005] In view of the above problems in the prior art, a high-rise unloading platform and unloading method for public buildings are proposed.

[0006] In one aspect of the present application, a material unloading platform for high-rise public buildings is provided, the purpose of which is to enable workers to complete the transfer of building materials on the material unloading platform without leaving the structural floor, thereby improving the safety of construction.

[0007] The technical solution of the present invention is: a high-rise unloading platform for public buildings, comprising a cantilevered main beam fixed on a structural floor, a secondary beam arranged at a cantilevered portion of the cantilevered main beam, a cantilevered cable arranged between an upper adjacent structural floor and the cantilevered main beam, and a loading unit arranged on the cantilevered main beam; The loading unit includes a support shaft 1 arranged at the left end of the cantilevered main beam, a pair of slide rails whose ends are rotatably arranged on the support shaft 1, a loading plate arranged between the pair of slide rails, side plates arranged on both sides of the loading plate, and multiple groups of pulleys arranged on the side plates, wherein the pulleys slide in the slide rails, and also include a pair of limit plates arranged in the middle of the cantilevered main beam, and limit openings arranged on the limit plates, wherein the slide rails are engaged in the limit plates, and the slide rails are limited to swing within ±2° relative to the horizontal plane, and also include a connecting ear arranged at the upper end of the middle of the slide rails, a hanging nail arranged on the cantilevered main beam and located above the connecting ear, and a tension spring connected to the connecting ear and the hanging nail; when the loading plate is in an unloaded state, the gravity acting on the loading plate is less than the tension of the tension spring, causing the loading plate to tilt upward relative to the horizontal plane; in a loading state, the gravity acting on the loading plate is greater than the tension of the tension spring, causing the loading plate to tilt downward relative to the horizontal plane.

[0008] By adopting the above scheme, by setting up a loading unit and utilizing the difference in gravity between the loading state and the unloaded state, the loading plate can automatically slide to the structural floor, and then automatically slide back to the cantilevered part of the cantilevered main beam after unloading the materials. This avoids the need for construction workers to stand on the unloading platform to work, thereby improving work safety.

[0009] Furthermore, the loading unit also includes a protective component, which includes a limit tooth 1 arranged at the right end of the slide rail, a support shaft 2 arranged at the end of the cantilevered main beam, a limit block rotatably arranged on the support shaft 2, a limit tooth 2 arranged on the limit block, and a pull rod arranged on the limit block, and the limit tooth 1 and the limit tooth 2 are meshed with each other.

[0010] By adopting the above scheme, a protective component is set to control the engagement and disengagement of limit tooth 1 and limit tooth 2, thereby controlling the inclination of the carrier plate and realizing the control of the left and right sliding of the carrier plate, so that the carrier plate will not slide during the unloading process, further improving the safety of the operation process.

[0011] Furthermore, rubber damping sheets are provided at both ends of the slide rail, and sockets are provided on the rubber damping sheets; buffer plates are provided at both ends of the side panels, and the buffer plates match the sockets.

[0012] By adopting the above scheme, the buffer plate is inserted into the rubber damping plate to achieve deceleration and buffering at the beginning and end of the sliding stroke of the carrier plate, thereby preventing the carrier plate from sliding too fast, making the transportation process smooth and safe, and at the same time limiting the sliding stroke of the carrier plate.

[0013] Furthermore, a pair of telescopic rods are arranged on the cantilevered main beam, the upper ends of the telescopic rods are against the adjacent structural floor slabs, and the lower ends are fixedly connected to the cantilevered main beam, and a cross bar is connected between the pair of telescopic rods.

[0014] By adopting the above scheme, a telescopic rod is set up to press the cantilever main beam against the lower structure floor through the upper structure floor, so that the upper structure floor shares a part of the gravity of the cantilever main beam, making the force of the cantilever main beam more stable.

[0015] Furthermore, an oblique rod is hinged between the telescopic rod and the cantilevered main beam.

[0016] By adopting the above solution and arranging the diagonal rod, the connection between the telescopic rod and the cantilevered main beam is made more stable.

[0017] Furthermore, a protective fence is provided on the portion of the cantilevered main beam cantilevering out of the structural floor.

[0018] By adopting the above solution and setting up protective fences, the safety of construction operations can be increased.

[0019] Furthermore, there are two groups of cantilever cables, one of which is connected between the left end of the cantilever main beam and the edge of the upper structure floor, and the other is connected between the middle of the cantilever main beam and the edge of the upper structure floor.

[0020] By adopting the above scheme, two groups of cantilever cables are set up to make the upper structure floor share the gravity of the unloading platform.

[0021] Furthermore, embedded bolts are fixed on the structural floor slab, and a pressure plate is arranged on the embedded bolts, and the pressure plate squeezes and fixes the cantilevered main beam.

[0022] By adopting the above solution, the cantilevered main beam is fixed to the structural floor slab by setting multiple sets of embedded bolts and pressure plates.

[0023] Another aspect of the present application provides a method for unloading materials for high-rise public buildings, comprising the following steps: Step 1: Use a tower crane to suspend the building materials on the ground onto the loading platform; Step 2: Pull the pull rod to disengage the limit tooth 1 from the limit tooth 2. The gravity on the loading plate in the loading state is greater than the tension of the tension spring, causing the loading plate to tilt downward relative to the horizontal plane. Push back the pull rod to re-engage the limit tooth 1 from the limit tooth 2. Step 3: The loading plate slowly slides along the slide rail to the top of the structural floor, and the building materials on the loading plate are unloaded onto the structural floor; Step 4: Pull the pull rod to disengage the limit tooth 1 from the limit tooth 2. When the carrier plate is unloaded, the gravity on the carrier plate is less than the tension of the tension spring, causing the carrier plate to tilt upward relative to the horizontal plane. Push the pull rod back to re-engage the limit tooth 1 from the limit tooth 2. Step 5: The loading plate slowly slides along the slide rail to the part where the cantilevered main beam cantilevers out of the structural floor to achieve reset.

[0024] Beneficial effects of the present invention: By setting up a loading unit and utilizing the difference in gravity between the loading state and the unloaded state, the loading plate can automatically slide to the structural floor, and then automatically slide back to the cantilevered part of the cantilevered main beam after unloading the materials. This avoids the need for construction workers to stand on the unloading platform to work, thus improving work safety.

[0025] By setting up a protective component to control the engagement and disengagement of the limit tooth 1 and the limit tooth 2, the inclination of the carrier plate is controlled, and the left and right sliding of the carrier plate is controlled, so that the carrier plate will not slide during the unloading process, further improving the safety of the operation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional diagram of a high-rise unloading platform for public buildings according to the present invention; Figure 2 A top view of the unloading platform for high-rise public buildings of the present invention; Figure 3 For the present invention Figure 2 Sectional view at AA; Figure 4 This is a structural diagram related to the cantilevered main beam in the unloading platform for high-rise public buildings of the present invention; Figure 5 For the present invention Figure 4 A cross-sectional view of Figure 6 This is a structural diagram of the loading plate in the unloading platform for high-rise public buildings of the present invention; Figure 7 This is a structural diagram of the protective components in the unloading platform for high-rise public buildings of the present invention; Figure 8 This is a schematic diagram of step 2 of the method for discharging materials for high-rise public buildings of the present invention; Fig. 9 This is a schematic diagram of step 4 of the method for unloading materials for high-rise public buildings of the present invention.

[0027] In the figure: 1. Structural floor; 2. Cantilever main beam; 3. Cantilever cable; 4. Support shaft one; 5. Slide rail; 6. Loading plate; 7. Side plate; 8. Pulley; 9. Limit plate; 10. Limit opening; 11. Connecting ear; 12. Hanging nail; 13. Tension spring; 14. Protective component; 15. Limit tooth one; 16. Support shaft two; 17. Limit block; 18. Limit tooth two; 19. Pull rod; 20. Rubber damping sheet; 21. Socket; 22. Buffer plate; 23. Telescopic rod; 24. Cross bar; 25. Diagonal rod; 26. Protective fence; 27. Embedded bolts; 28. Pressure plate. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] Example 1, reference Figure 1-Figure 9 , which is the first embodiment of the present invention, provides a high-rise unloading platform for public buildings, including a cantilevered main beam 2 fixed on a structural floor 1, a secondary beam arranged at the cantilevered part of the cantilevered main beam 2, a cantilevered cable 3 arranged between the upper adjacent structural floor 1 and the cantilevered main beam 2, and also includes a loading unit arranged on the cantilevered main beam 2; the loading unit includes a support shaft 4 arranged at the left end of the cantilevered main beam 2, a pair of slide rails 5 whose ends are rotatably arranged on the support shaft 4, a loading plate 6 arranged between the pair of slide rails 5, side plates 7 arranged on both sides of the loading plate 6, and multiple groups of pulleys 8 arranged on the side plates 7, the pulleys 8 slide in the slide rails 5, and also includes a loading unit arranged A pair of limit plates 9 are provided in the middle of the cantilevered main beam 2, and a limit opening 10 is provided on the limit plate 9. The slide rail 5 is engaged in the limit plate 9, and the slide rail 5 is limited to swing within ±2° relative to the horizontal plane. It also includes a connecting ear 11 provided at the upper end of the middle of the slide rail 5, a hanging nail 12 provided on the cantilevered main beam 2 and located above the connecting ear 11, and a tension spring 13 connected to the connecting ear 11 and the hanging nail 12; when the loading plate 6 is in an unloaded state, the gravity acting on the loading plate 6 is less than the tension of the tension spring 13, so that the loading plate 6 tilts upward relative to the horizontal plane; in the loading state, the gravity acting on the loading plate 6 is greater than the tension of the tension spring 13, so that the loading plate 6 tilts downward relative to the horizontal plane.

[0030] Specifically, the cantilever main beam 2 is in a C shape and consists of two cross beams and one longitudinal beam. Multiple secondary beams are fixedly connected to the bottom edge of the cantilever main beam 2 outside the structural floor 1 to form a surface. The support shaft 1 4 is fixed between a pair of cross beams and is located at the leftmost end of the cross beams. The left ends of a pair of slide rails 5 are respectively rotatably sleeved on the support shaft 1 4. Three groups of pulleys 8 are respectively rotatably arranged on the side plates 7 on both sides of the load-carrying plate 6, and the pulleys 8 slide within the slide rails 5. When the load-carrying plate 6 bears a load, the gravity of the load-carrying plate 6 and the load is greater than the tension of the tension spring 13 (the weight of the slide rails 5 is ignored). At this time, the tension spring 13 is stretched, and the two slide rails 5 respectively touch the lower edge of the limit opening 10 on the limit plate 9. At this time, the load-carrying plate 6 is inclined downward by 2° compared with the horizontal plane. Under the action of gravity, the load-carrying plate 6 and the load slide to the right along the slide rails 5 together. After the load is unloaded, the weight of the load-carrying plate 6 is less than the tension of the tension spring 13. At this time, the tension spring 13 contracts. At this time, the load-carrying plate 6 is inclined downward by 2° compared with the horizontal plane. Under the action of gravity, the load-carrying plate 6 and the load slide to the left along the slide rails 5 together.

[0031] By setting the load-carrying unit, making use of the difference in the gravity of the load-carrying plate 6 in the no-load state and the load state, the load-carrying plate 6 automatically slides onto the structural floor 1 and automatically slides back to the cantilever part of the cantilever main beam 2 after unloading the materials; it avoids construction workers working on the unloading platform and improves the operation safety.

[0032] Refer to Figure 7 The load-carrying unit further includes a protection component 14. The protection component 14 includes a limit tooth 1 15 arranged at the right end of the slide rail 5, a support shaft 2 16 arranged at the end of the cantilever main beam 2, a limit block 17 rotatably arranged on the support shaft 2 16, a limit tooth 2 18 arranged on the limit block 17, and a pull rod 19 arranged on the limit block 17. The limit tooth 1 15 and the limit tooth 2 18 are meshed with each other.

[0033] Specifically, the protection component 14 is arranged on one of the slide rails 5. The support shaft 2 16 is fixed at the right end of one of the cross beams of the cantilever main beam 2. The limit block 17 is rotatably arranged on the support shaft 2 16. By pulling the pull rod 19, the meshing and disengagement of the limit tooth 1 15 and the limit tooth 2 18 are controlled to lock the inclined state of the pair of slide rails 5. When there is a tendency for the inclined angle of the slide rails 5 to change, the pull rod 19 needs to be pulled to release the rotational restriction on the slide rails 5.

[0034] By setting the protection component 14, controlling the meshing and disengagement of the limit tooth 1 15 and the limit tooth 2 18, thereby controlling the inclination of the load-carrying plate 6 and realizing the control of the left and right sliding of the load-carrying plate 6, so that the load-carrying plate 6 does not slide during the unloading process, further improving the safety of the operation process.

[0035] Refer to Figure 6-Figure 7Both ends of the slide rail 5 are provided with rubber damping sheets 20 , and the rubber damping sheets 20 are provided with sockets 21 ; both ends of the side plate 7 are provided with buffer plates 22 , and the buffer plates 22 match with the sockets 21 .

[0036] Specifically, buffer plates 22 are provided at both ends of the side plates 7 on both sides of the loading plate 6, and the narrow part of the buffer plate 22 can be inserted into the socket 21. The narrow ends of the buffer plates 22 on the same side are in opposite directions. Rubber damping plates 20 are provided at both ends of a pair of slide rails 5, and the sockets 21 of the rubber damping plates 20 on the same side are in opposite directions; the width of the socket 21 on the rubber damping plate 20 is slightly smaller than the width of the narrow end of the buffer plate 22. The process of inserting the buffer plate 22 into the socket 21 is subject to friction, which causes the loading plate 6 to slow down when sliding to the two ends of the slide rail 5.

[0037] By inserting the buffer plate 22 into the rubber damping plate 20, the carrier plate 6 can be decelerated and buffered at the beginning and end of the sliding stroke, thereby preventing the carrier plate 6 from sliding too fast, making the transportation process smooth and safe, and at the same time limiting the sliding stroke of the carrier plate 6.

[0038] Reference Figure 1 A pair of telescopic rods 23 are provided on the cantilevered main beam 2, the upper ends of the telescopic rods 23 are against the adjacent structural floor 1, and the lower ends are fixedly connected to the cantilevered main beam 2, and a cross bar 24 is connected between the pair of telescopic rods 23.

[0039] Specifically, the telescopic rod 23 is a sleeve rod, and the length of the telescopic rod 23 is fixed by bolts. By adjusting the length of the telescopic rod 23, the upper end of the telescopic rod 23 is tightly against the structural floor 1 of the upper layer.

[0040] By setting the telescopic rod 23, the telescopic rod 23 presses the cantilever main beam 2 against the lower structure floor 1 through the upper structure floor 1, so that the upper structure floor 1 shares a part of the gravity of the cantilever main beam 2, making the force of the cantilever main beam 2 more stable.

[0041] Reference Figure 1 A diagonal rod 25 is hinged between the telescopic rod 23 and the cantilevered main beam 2.

[0042] By providing the diagonal rod 25, the connection between the telescopic rod 23 and the cantilevered main beam 2 is made more stable.

[0043] Reference Figure 1 A protective fence 26 is provided on the part of the cantilevered main beam 2 cantilevering out of the structural floor 1.

[0044] By providing the protective fence 26, the safety of the construction work is increased.

[0045] Reference Figure 1There are two groups of cantilever cables 3, one of which is connected between the left end of the cantilever main beam 2 and the edge of the upper structure floor 1, and the other is connected between the middle of the cantilever main beam 2 and the edge of the upper structure floor 1.

[0046] By arranging two groups of cantilever cables 3, the upper structure floor 1 can share the gravity of the unloading platform.

[0047] Reference Figure 1 The structural floor 1 is fixed with embedded bolts 27 , and a pressing plate 28 is arranged on the embedded bolts 27 , and the pressing plate 28 squeezes and fixes the cantilevered main beam 2 .

[0048] The cantilevered main beam 2 is fixed on the structural floor 1 by providing a plurality of sets of embedded bolts 27 and pressure plates 28 .

[0049] Example 2, reference Figure 8-Figure 9 , which is a second embodiment of the present invention, provides a method for unloading materials for high-rise public buildings, using a high-rise public building unloading platform, comprising the following steps: Step 1: Suspend the building materials on the ground onto the loading board 6 by using a tower crane; Step 2: Pull the pull rod 19 to disengage the limit tooth 15 and the limit tooth 2 18. The gravity on the loading plate 6 in the loading state is greater than the tension of the tension spring 13, so that the loading plate 6 tilts downward relative to the horizontal plane. Push back the pull rod 19 to re-engage the limit tooth 15 and the limit tooth 2 18. Step 3: The loading plate 6 slowly slides along the slide rail 5 to the top of the structural floor 1, and the building materials on the loading plate 6 are unloaded onto the structural floor 1; Step 4: Pull the pull rod 19 to disengage the limit tooth 15 from the limit tooth 2 18. When the carrier plate 6 is unloaded, the gravity on the carrier plate 6 is less than the tension of the tension spring 13, so that the carrier plate 6 tilts upward relative to the horizontal plane. Push back the pull rod 19 to re-engage the limit tooth 15 and the limit tooth 2 18. Step 5: The loading plate 6 slowly slides along the slide rail 5 to the portion where the cantilevered main beam 2 cantilevers out of the structural floor 1 to achieve resetting.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A high-rise unloading platform for a public building, comprising a cantilevered main beam (2) fixed on a structural floor (1), a secondary beam arranged at a cantilevered portion of the cantilevered main beam (2), and a cantilevered cable (3) arranged between an upper adjacent structural floor (1) and the cantilevered main beam (2), characterized in that: It also includes a loading unit arranged on the cantilevered main beam (2); The loading unit comprises a support shaft (4) arranged at the left end of the cantilevered main beam (2), a pair of slide rails (5) whose ends are rotatably arranged on the support shaft (4), a loading plate (6) arranged between the pair of slide rails (5), side plates (7) arranged on both sides of the loading plate (6), and a plurality of pulleys (8) arranged on the side plates (7), wherein the pulleys (8) slide in the slide rails (5), and further comprises a pair of limit plates (9) arranged in the middle of the cantilevered main beam (2), and a limit opening (10) arranged on the limit plate (9), wherein the slide rail (5) is engaged in the limit plate (9), and the slide rail (5) is arranged in the position. ) is limited to swing within ±2° relative to the horizontal plane, and also includes a connecting ear (11) arranged at the upper end of the middle part of the slide rail (5), a hanging nail (12) arranged on the cantilevered main beam (2) and located above the connecting ear (11), and a tension spring (13) connected to the connecting ear (11) and the hanging nail (12); when the loading plate (6) is in an unloaded state, the gravity applied to the loading plate (6) is less than the tension of the tension spring (13), so that the loading plate (6) tilts upward relative to the horizontal plane; when loading, the gravity applied to the loading plate (6) is greater than the tension of the tension spring (13), so that the loading plate (6) tilts downward relative to the horizontal plane.

2. The unloading platform for high-rise public buildings according to claim 1 is characterized by: The load-carrying unit further comprises a protection component (14), the protection component (14) comprising a first limiting tooth (15) arranged at the right end of the slide rail (5), a second supporting shaft (16) arranged at the end of the cantilevered main beam (2), a limiting block (17) rotatably arranged on the second supporting shaft (16), a second limiting tooth (18) arranged on the limiting block (17), and a pull rod (19) arranged on the limiting block (17), wherein the first limiting tooth (15) and the second limiting tooth (18) are meshed with each other.

3. The unloading platform for high-rise public buildings according to claim 2 is characterized by: Rubber damping sheets (20) are provided at both ends of the slide rail (5), and a socket (21) is provided on the rubber damping sheet (20); buffer plates (22) are provided at both ends of the side plate (7), and the buffer plates (22) match the socket (21).

4. The unloading platform for high-rise public buildings according to claim 3 is characterized by: A pair of telescopic rods (23) are provided on the cantilever main beam (2), the upper ends of the pair of telescopic rods (23) are against the adjacent structural floor (1), the lower ends are fixedly connected to the cantilever main beam (2), and a cross bar (24) is connected between the pair of telescopic rods (23).

5. The unloading platform for high-rise public buildings according to claim 4 is characterized by: An oblique rod (25) is hingedly connected between the telescopic rod (23) and the cantilevered main beam (2).

6. The unloading platform for high-rise public buildings according to claim 5 is characterized by: The portion of the cantilevered main beam (2) cantilevered out of the structural floor (1) is provided with a protective fence (26).

7. The unloading platform for high-rise public buildings according to claim 6 is characterized by: The cantilever cables (3) have two groups, one of which is connected between the left end of the cantilever main beam (2) and the edge of the upper structure floor (1), and the other is connected between the middle of the cantilever main beam (2) and the edge of the upper structure floor (1).

8. The unloading platform for high-rise public buildings according to claim 7 is characterized by: Embedded bolts (27) are fixed on the structural floor slab (1), and a pressing plate (28) is provided on the embedded bolts (27), and the pressing plate (28) squeezes and fixes the cantilevered main beam (2).

9. A method for unloading materials for high-rise public buildings, using the unloading platform for high-rise public buildings as claimed in claim 2, characterized in that: The following steps are included: Step 1: Suspending the building materials on the ground onto the loading plate (6) by means of a tower crane; Step 2: Pull the pull rod (19) to disengage the first limit tooth (15) and the second limit tooth (18). The gravity on the loading plate (6) in the loading state is greater than the tension of the tension spring (13), so that the loading plate (6) tilts downward relative to the horizontal plane. Push back the pull rod (19) to re-engage the first limit tooth (15) and the second limit tooth (18). Step 3: The loading plate (6) slowly slides along the slide rail (5) to the top of the structural floor (1), and the building materials on the loading plate (6) are unloaded onto the structural floor (1); Step 4: Pull the pull rod (19) to disengage the first limit tooth (15) and the second limit tooth (18). When the loading plate (6) is unloaded, the gravity on the loading plate (6) is less than the tension of the tension spring (13), causing the loading plate (6) to tilt upward relative to the horizontal plane. Push back the pull rod (19) to re-engage the first limit tooth (15) and the second limit tooth (18). Step 5: The loading plate (6) slowly slides along the slide rail (5) to the portion where the cantilevered main beam (2) cantilevers out of the structural floor (1) to achieve reset.

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