A building machine prefabricated part lifting and conveying system applied to fabricated buildings

Abstract

The application relates to the technical field of building machines, and discloses a building machine prefabricated part lifting and conveying system applied to fabricated buildings, which comprises a building machine lifting formwork, the outer portion of the building machine lifting formwork is sequentially provided with a prefabricated part finished product waiting rotating platform and a prefabricated part preparation platform from top to bottom, the prefabricated part finished product waiting rotating platform is fixedly connected with the prefabricated part preparation platform, and the prefabricated part finished product waiting rotating platform and the building machine lifting formwork have a spacing for accommodating the prefabricated part preparation platform; the low-cycle preparation of small components is matched with a single-layer building cycle, the weight of the small components has a smaller influence on the building machine, the crane lifting operation distance is greatly reduced through cooperation of the prefabricated part preparation platform and the prefabricated part finished product waiting rotating platform, the material distribution of the prefabricated part mold only needs to be matched with a pumping mechanism through a prefabricated part material distribution mechanism to realize slurry transportation of the small components, and the fabricated building with more small components has higher building efficiency.

Description

Technical Field

[0001] This invention relates to the field of building construction machine technology, specifically a prefabricated component lifting and conveying system for prefabricated buildings. Background Technology

[0002] During construction, the building-building machine rises as the building grows taller. When used in prefabricated buildings, the following problems arise:

[0003] Firstly, the precast components vary in size. Large precast components are subject to curing period limitations, resulting in a longer preparation cycle. Therefore, they need to be prepared in advance. When the building machine is raised, the transportation mechanism needs to lift the precast components of different sizes from the ground floor, which increases the lifting cycle. At the same time, the height of the building increases the lifting distance and poses certain lifting risks. Although the number of large precast components is less than that of small precast components, the lifting frequency of the crane is still very high when the number of small precast components is large. In this case, the lifting efficiency of the crane will decrease as the number of floors increases. Summary of the Invention

[0004] The purpose of this invention is to provide a prefabricated component lifting and conveying system for prefabricated buildings, which can solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A prefabricated component lifting and conveying system for prefabricated buildings includes a building lifting template, and a prefabricated component preparation platform and a prefabricated component finished product waiting platform are slidably connected from bottom to top on the outside of the building lifting template.

[0007] The precast component preparation platform is slidably connected to the building machine lifting template via a precast component lifting mechanism. The precast component preparation platform consists of a fabric fixing and extension platform and a moving component precast platform. A precast component fabrication mechanism is fixedly connected to the fabric fixing and extension platform. Several precast component molds are provided on the moving component precast platform. The fabric fixing and extension platform is distributed at both ends of the moving component precast platform. The fabric fixing and extension platform is fixedly connected to the building machine lifting template and moves synchronously with the building machine lifting template. The moving component precast platform is slidably connected to the side of the building machine lifting template via the precast component lifting mechanism.

[0008] The prefabricated component waiting platform is slidably connected to the side of the building machine's lifting template via a finished product lifting mechanism. The finished product lifting mechanism includes corner columns and lifting components. The corner columns are perpendicularly corresponding to the fabric fixing and extension platform and are fixedly connected to the building machine's lifting template. The lifting components are installed on the side of the corner columns to control the lifting of the prefabricated component waiting platform. The prefabricated component waiting platform is a rectangular frame, and the corner columns are located at the inner corners of the frame of the prefabricated component waiting platform. There is a gap between the prefabricated component waiting platform and the building machine's lifting template to accommodate the moving component prefabricated platform.

[0009] As a further embodiment of the present invention: the building construction machine lifting template is externally fixedly connected to an outer protective template, the top of the building construction machine lifting template is fixedly connected to a top extension frame, the bottom of the building construction machine lifting template is fixedly connected to a bottom connecting frame, the bottom connecting frame is fixedly connected to the outer protective template, and the top extension frame is fixedly connected to the outer protective template through a plurality of equidistantly distributed top connecting templates.

[0010] As a further embodiment of the present invention: a plurality of equidistantly distributed central connecting rods are fixedly connected to the middle of the side wall of the lifting template of the building construction machine. The central connecting rods are located below the precast component finished product waiting platform and above the moving component precast platform. The top surface of the moving component precast platform and the bottom surface of the precast component finished product waiting platform are both provided with arc grooves corresponding to the central connecting rods. The arc grooves on the moving component precast platform are staggered with the precast component mold.

[0011] As a further embodiment of the present invention: a supporting extension fixing member is fixedly connected to the bottom of the corner column, the supporting extension fixing member extends to the outer protective template, the supporting extension fixing member is fixedly connected to the outer protective template, and there is a gap between the two outer walls at the corner of the supporting extension fixing member and the two outer walls at the corner of the prefabricated finished product waiting platform, and there is a gap between the outer wall of the prefabricated finished product waiting platform and the outer protective template that is smaller than the shortest side of the smallest prefabricated part.

[0012] As a further embodiment of the present invention: the corner column extends to the corner of the top extension frame, and when the lifting component drives the prefabricated finished product waiting platform to move to the highest extreme position, the top extension frame is located inside the prefabricated finished product waiting platform, and the surface of the top extension frame is flush with the surface of the prefabricated finished product waiting platform.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] Considering the factors that the number of large components is less than that of small components, and the curing cycle of large components is longer than that of small components, a follow-up small component preparation system is set up on the basis of the existing building construction machine. This system utilizes the short preparation cycle of small components to match the single-story building construction cycle, while the weight of small components has a smaller impact on the building construction machine. Through the cooperation of the precast component preparation platform and the precast component finished product waiting platform, the crane lifting stroke is significantly reduced. The material placement of the precast component mold only requires the use of the precast component material placement mechanism in conjunction with the pumping mechanism to achieve slurry delivery for small components. Moreover, this system can be added as needed and is suitable for use in conjunction with existing building construction machines. It has higher building construction efficiency for prefabricated buildings with a large number of small components. It effectively combines the actual movement stroke to ensure construction safety. The combination of alternating operation and platform connection allows the process to be adjusted according to the actual construction situation, making it more suitable for practical applications. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional schematic diagram of a prefabricated component lifting and conveying system for prefabricated buildings;

[0017] Figure 2 This is a three-dimensional schematic diagram from another perspective of a prefabricated component lifting and conveying system for prefabricated buildings;

[0018] Figure 3 This is a three-dimensional schematic diagram of the outer protective formwork after it has been disassembled in a prefabricated component lifting and conveying system for prefabricated buildings.

[0019] Figure 4 This is a front view schematic diagram of the external protective formwork after it has been disassembled in a prefabricated component lifting and conveying system for prefabricated buildings.

[0020] Figure 5 This is a three-dimensional schematic diagram from another perspective after the outer protective formwork of a prefabricated component lifting and conveying system used in prefabricated buildings is removed.

[0021] Figure 6 This is a three-dimensional schematic diagram of the lifting platform of a moving component prefabrication platform in a prefabricated component lifting and conveying system for prefabricated buildings.

[0022] Figure 7This is a three-dimensional schematic diagram of the lifting platform for prefabricated components in a prefabricated component lifting and conveying system applied to prefabricated buildings;

[0023] In the diagram: 1. Building construction machine lifting formwork; 11. External protective formwork; 12. Top connecting formwork; 13. Top extension frame; 14. Bottom connecting frame; 15. Middle connecting rod; 2. Precast component preparation platform; 21. Fabrication fixing extension platform; 22. Movable component precast platform; 3. Precast component finished product waiting platform; 4. Precast component mold; 5. Precast component fabrication mechanism; 6. Precast component lifting mechanism; 7. Finished product lifting mechanism; 71. Corner column; 72. Lifting component; 73. Support extension fixing component. Detailed Implementation

[0024] Please see Figures 1-7 :

[0025] The system includes a building construction machine lifting template 1, and from bottom to top, a precast component preparation platform 2 and a precast component finished product transfer platform 3 are slidably connected to the outside of the building construction machine lifting template 1.

[0026] Firstly, the formwork 1 of the building construction machine is raised mainly by jacking up as the number of floors increases. Since the jacking operation of the formwork 1 of the building construction machine is a well-known technology in this field, it will not be described in detail here.

[0027] Firstly, the precast component lifting and conveying system is primarily designed to address the issue of excessively long lifting times during later stages of building construction, where the lifting frequency remains constant despite increased travel distance. Because the manufacturing cycle of large precast components is too long, the precast component lifting and conveying system is not well-matched to the building construction cycle. Therefore, leveraging the greater quantity and shorter cycle time of small precast components compared to large ones, a precast component lifting and conveying system is established to improve the building construction cycle while reducing the lifting frequency.

[0028] Therefore, based on the building construction requirements of the lifting formwork 1, a precast component preparation platform 2 and a precast component finished product transfer platform 3 are set up outside the lifting formwork 1. The main purpose is to enable the preparation of small, low-cycle precast components on the precast component preparation platform 2, matching the preparation cycle of small precast components with the building construction cycle. By hoisting the small precast components onto the precast component finished product transfer platform 3, the hoisting stroke can be significantly reduced.

[0029] Because operators are needed to assist in securing the hook during hoisting, the hoisting process requires a certain amount of time to complete. Therefore, to facilitate the management of project progress, the precast component preparation platform 2 and the precast component finished product transfer platform 3 are separated, allowing the precast component preparation platform 2 and the precast component finished product transfer platform 3 to form an alternating processing system, which helps to shorten the construction period.

[0030] The precast component preparation platform 2 is slidably connected to the building machine lifting template 1 via the precast component lifting mechanism 6. The precast component preparation platform 2 consists of a fabric fixing extension platform 21 and a moving component precast platform 22. A precast component fabrication mechanism 5 is fixedly connected to the fabric fixing extension platform 21. Several precast component molds 4 are set on the moving component precast platform 22. The fabric fixing extension platform 21 is distributed at both ends of the moving component precast platform 22. The fabric fixing extension platform 21 is fixedly connected to the building machine lifting template 1, and the fabric fixing extension platform 21 moves synchronously with the building machine lifting template 1. The moving component precast platform 22 is slidably connected to the side of the building machine lifting template 1 via the precast component lifting mechanism 6.

[0031] Firstly, the precast component preparation platform 2 primarily serves the preparation function, therefore it is positioned at the bottom. Since lifting the precast component preparation platform 2 requires power, a precast component lifting mechanism 6 is provided. Secondly, the precast component mold 4 requires slurry filling; therefore, the precast component preparation platform 2 is divided into a material placement and fixing extension platform 21 and a moving component precast platform 22, with the material placement and fixing extension platform 21 positioned at the corner. The material placement and fixing extension platform 21 is fixed to the building construction machine's lifting template 1, providing installation space for the precast component placement mechanism 5. At this point, slurry is pumped from below to the precast component placement mechanism 5, which injects slurry into the precast component mold 4 to prepare the precast component. The precast component placement mechanism 5 adopts a triangular folding arm design; when the moving component precast platform 22 moves upward, the precast component placement mechanism 5 can bend within the horizontal area of ​​the material placement and fixing extension platform 21, without interfering with the movement of the moving component precast platform 22. Meanwhile, the finished product lifting mechanism 7 above and the fabric fixing extension platform 21 have a staggered spacing, which effectively utilizes the space and meets the needs of use.

[0032] The prefabricated component waiting platform 3 is slidably connected to the side of the building machine lifting template 1 via the finished product lifting mechanism 7. The finished product lifting mechanism 7 includes corner columns 71 and lifting components 72. The corner columns 71 are perpendicularly corresponding to the fabric fixing extension platform 21. The corner columns 71 are fixedly connected to the building machine lifting template 1. The lifting components 72 are installed on the side of the corner columns 71 to control the lifting of the prefabricated component waiting platform 3. The prefabricated component waiting platform 3 is a rectangular frame. The corner columns 71 are located at the inner corner of the frame of the prefabricated component waiting platform 3. There is a gap between the prefabricated component waiting platform 3 and the building machine lifting template 1 to accommodate the moving component prefabricated platform 22.

[0033] The above describes the operation process of the precast component preparation platform 2. When the precast component preparation platform 2 is transported upward, the corner column 71 is fixed at the corner of the building machine lifting template 1. The precast component finished product waiting platform 3 is a rectangular frame. The inner wall of the precast component finished product waiting platform 3 slides perpendicularly to the corner of the corner column 71, and the lifting component 72 provides power. At this time, the precast component finished product waiting platform 3 will inevitably have a gap with the building machine lifting template 1. When the moving component precast platform 22 rises to its limit height, the moving component precast platform 22 will move into the storage gap between the precast component finished product waiting platform 3 and the building machine lifting template 1. At this time, the precast component preparation platform 2 and the precast component finished product waiting platform 3 form a complete operating platform. At this time, the operator can disassemble the precast component on the precast component mold 4 and push it to the precast component finished product waiting platform 3. At this time, the precast component preparation platform 2 descends to continue preparation, and the precast component finished product waiting platform 3 is ready.

[0034] The purpose of setting up the precast component preparation platform 3 is to facilitate project coordination and management. If the precast component preparation platform 2 is directly raised to the top extension frame 13, and this process is not yet underway, the precast components after disassembly of the precast mold 4 will occupy the construction space above. Therefore, by setting up the precast component preparation platform 3 on the outside of the lifting formwork 1 of the building construction machine, adjustments can be made according to the project situation.

[0035] To enhance operational safety, an outer protective formwork 11 was added to the outside of the lifting formwork 1 of the building construction machine. This creates a gap between the outer protective formwork 11 and the lifting formwork 1, increasing the difficulty of hoisting but protecting the precast components on the precast component transfer platform 3. Therefore, to further improve both safety and ease of hoisting, a precast component lifting mechanism 7 was added. After the lifting component 72 raises the precast component transfer platform 3, it significantly reduces the gap depth between the outer protective formwork 11 and the lifting formwork 1, making the precast component transfer platform 3 easier to hoist. This further shortens the hoisting cycle and ensures operational safety.

[0036] The external protective template 11 is fixedly connected to the lifting template 1 of the building construction machine. The top end of the lifting template 1 of the building construction machine is fixedly connected to the top extension frame 13. The bottom end of the lifting template 1 of the building construction machine is fixedly connected to the bottom connection frame 14. The bottom connection frame 14 is fixedly connected to the outer protective template 11. The top extension frame 13 is fixedly connected to the outer protective template 11 through several equidistantly distributed top connection templates 12.

[0037] Because of the precast component preparation platform 2 and the precast component finished product waiting platform 3, an outer protective template 11 is set up to reduce the safety risk of falling objects from heights. However, the precast component preparation platform 2 and the precast component finished product waiting platform 3 slide between the outer protective template 11 and the building construction machine lifting template 1. How to increase the fixed stability of the outer protective template 11 is the key point.

[0038] First, the movement strokes of the precast component preparation platform 2 and the precast component finished product transfer platform 3 have been explained above. Since both the precast component preparation platform 2 and the precast component finished product transfer platform 3 are in an upward motion, the lower part of the precast component preparation platform 2 and the upper part of the precast component finished product transfer platform 3 are both connection nodes at this time.

[0039] A top extension frame 13 is added to the top of the lifting formwork 1 of the building construction machine. The top extension frame 13 extends outward, and its extension width is consistent with that of the precast component preparation platform 2. A bottom connecting frame 14 is added to the bottom of the lifting formwork 1. The extension width of the bottom connecting frame 14 is consistent with that of the precast component transfer platform 3. The bottom connecting frame 14 can be directly and fixedly connected to the bottom end of the outer protective formwork 11. Reinforcing ribs are added to increase the connection strength, and the barrier net also helps to prevent falling objects. Since the movement height of the precast component transfer platform 3 is limited, the top extension frame 13 is fixedly connected to the top of the outer protective formwork 11 through a U-shaped top connecting frame 12. This fixes the upper and lower ends of the outer protective formwork 11 without affecting the movement stroke of the precast component preparation platform 2 and the precast component transfer platform 3.

[0040] A number of equidistantly distributed central connecting rods 15 are fixedly connected to the middle of the side wall of the building construction machine lifting template 1. The central connecting rods 15 are located below the precast component finished product waiting platform 3 and above the moving component precast platform 22. The top surface of the moving component precast platform 22 and the bottom surface of the precast component finished product waiting platform 3 are both provided with arc grooves corresponding to the central connecting rods 15. The arc grooves on the moving component precast platform 22 are staggered with the precast component mold 4.

[0041] To further improve the stability of the fixation, a central connecting rod 15 was added. Firstly, due to the motion characteristics of the prefabricated component platform 22 and the prefabricated component waiting-to-transfer platform 3, there is a non-moving area between them. Therefore, equidistantly distributed central connecting rods 15 are set at the overlapping area of ​​the prefabricated component platform 22 and the prefabricated component waiting-to-transfer platform 3. One end of the central connecting rod 15 is fixedly connected to the lifting template 1 of the building construction machine, and the other end is fixedly connected to the outer protective template 11. At this time, the middle and upper and lower parts of the outer protective template 11 form a surrounding and covering fixed point, greatly increasing the structural stability. However, since it is easier for the components on the prefabricated component platform 22 and the prefabricated component waiting-to-transfer platform 3 to move when their surfaces are flush, arc grooves corresponding to the central connecting rods 15 are opened on the top surface of the prefabricated component platform 22 and the bottom surface of the prefabricated component waiting-to-transfer platform 3. At this point, after the prefabrication platform 22 contacts the prefabricated component transfer platform 3, the connecting rod 15 is positioned between the prefabrication platform 22 and the prefabricated component transfer platform 3. At this time, the thickness of the prefabrication platform 22 can be greater than the thickness of the prefabricated component transfer platform 3. This is mainly because the prefabrication platform 22 bears not only the weight of the component but also the weight of the mold and auxiliary equipment. Therefore, the thickness of the prefabrication platform 22 must be greater than the thickness of the prefabricated component transfer platform 3 to ensure strength and also to allow the prefabrication platform 22 and the prefabricated component transfer platform 3 to form a horizontal operating surface.

[0042] The bottom of the corner column 71 is fixedly connected to a support extension fixing member 73. The support extension fixing member 73 extends to the outer protective template 11. The support extension fixing member 73 is fixedly connected to the outer protective template 11. The two outer walls at the corner of the support extension fixing member 73 and the two outer walls at the corner of the prefabricated finished product waiting platform 3 are spaced apart. The outer wall of the prefabricated finished product waiting platform 3 and the outer protective template 11 have a gap smaller than the shortest side of the smallest prefabricated part.

[0043] Since the prefabricated component waiting platform 3 needs to remain stationary while in standby mode, a support extension fixing member 73 is installed at the bottom of the corner column 71. When the prefabricated component waiting platform 3 is in standby mode, the lifting component 72 can be de-energized, and the weight of the prefabricated component waiting platform 3 is applied to the support extension fixing member 73 for support. At the same time, after the support extension fixing member 73 is fixed to the outer protective template 11, the number of fixing nodes of the outer protective template 11 is increased, thereby increasing stability. Furthermore, the outer protective template 11 also provides support for the prefabricated component waiting platform 3. At this time, there is a gap between the two outer walls at the corners of the support extension fixing member 73 and the two outer walls at the corners of the prefabricated component waiting platform 3, and the gap between the outer walls of the prefabricated component waiting platform 3 and the outer protective template 11 is smaller than the shortest side of the smallest prefabricated component. This ensures that when the precast component waiting platform 3 is raised, the material will not fall to the outside through the gap between the precast component waiting platform 3 and the outer protective template 11. At the same time, clamps can be set on the precast component waiting platform 3 to fix it as needed.

[0044] The corner column 71 extends to the corner of the top extension frame 13. When the lifting component 72 drives the precast finished product waiting platform 3 to move to the highest position, the top extension frame 13 is located inside the precast finished product waiting platform 3, and the surface of the top extension frame 13 is flush with the surface of the precast finished product waiting platform 3.

[0045] Since the lifting component 72 controls the lifting and lowering of the precast component waiting platform 3, and the movement stroke of the precast component waiting platform 3 is limited by the lifting component 72, the corner column 71 extends to the corner of the top extension frame 13. At this time, the side wall of the corner column 71 can be flush with the top extension frame 13, thereby further extending the top of the movement stroke of the lifting component 72, so that the precast component waiting platform 3 can move to be flush with the top extension frame 13, thus making the top travel operating plane easier to hoist components or transport components to the processing area.

[0046] Based on this system, since the multi-story units on many floors have the same layout, the types and quantities of components required in each area are consistent during prefabricated building construction. Therefore, based on this system, prefabricated molds 4 corresponding to the required component models in the area closest to the prefabricated component platform 22 can be set on different moving component prefabrication platforms 22 as needed. At this time, the crane rotation stroke is further reduced, and the synchronous construction efficiency is further improved.

[0047] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A prefabricated component lifting and conveying system for prefabricated building construction, comprising a building construction lifting template (1), characterized in that: The building construction machine lifting template (1) is slidably connected from bottom to top to a prefabricated component preparation platform (2) and a prefabricated component finished product waiting platform (3); The precast component preparation platform (2) is slidably connected to the building machine lifting template (1) via the precast component lifting mechanism (6). The precast component preparation platform (2) consists of a fabric fixing extension platform (21) and a moving component precast platform (22). A precast component fabrication mechanism (5) is fixedly connected to the fabric fixing extension platform (21). Several precast component molds (4) are provided on the moving component precast platform (22). The fabric fixing extension platform (21) is distributed at both ends of the moving component precast platform (22). The fabric fixing extension platform (21) is fixedly connected to the building machine lifting template (1), and the fabric fixing extension platform (21) moves synchronously with the building machine lifting template (1). The moving component precast platform (22) is slidably connected to the side of the building machine lifting template (1) via the precast component lifting mechanism (6). The precast component waiting platform (3) is slidably connected to the side of the building machine lifting template (1) via a finished product lifting mechanism (7). The finished product lifting mechanism (7) includes a corner column (71) and a lifting component (72). The corner column (71) is perpendicular to the fabric fixing extension platform (21). The corner column (71) is fixedly connected to the building machine lifting template (1). The lifting component (72) is installed on the side of the corner column (71) to control the lifting of the precast component waiting platform (3). The precast component waiting platform (3) is a rectangular frame. The corner column (71) is located at the inner corner of the frame of the precast component waiting platform (3). There is a gap between the precast component waiting platform (3) and the building machine lifting template (1) for accommodating the moving component precast platform (22).

2. The prefabricated component lifting and conveying system for prefabricated buildings according to claim 1, characterized in that: The building machine lifting template (1) is externally fixedly connected to an outer protective template (11). The top of the building machine lifting template (1) is fixedly connected to a top extension frame (13). The bottom of the building machine lifting template (1) is fixedly connected to a bottom connecting frame (14). The bottom connecting frame (14) is fixedly connected to the outer protective template (11). The top extension frame (13) and the outer protective template (11) are fixedly connected by several equidistantly distributed top connecting templates (12).

3. The prefabricated component lifting and conveying system for prefabricated buildings according to claim 2, characterized in that: The side wall of the building construction machine lifting template (1) is fixedly connected with several equidistantly distributed central connecting rods (15). The central connecting rods (15) are located below the precast component waiting platform (3) and above the moving component precast platform (22). The top surface of the moving component precast platform (22) and the bottom surface of the precast component waiting platform (3) are both provided with arc grooves corresponding to the central connecting rods (15). The arc grooves on the moving component precast platform (22) are staggered with the precast mold (4).

4. The prefabricated component lifting and conveying system for prefabricated buildings according to claim 2, characterized in that: The bottom of the corner column (71) is fixedly connected to a support extension fixing member (73), which extends to the outer protective template (11). The support extension fixing member (73) is fixedly connected to the outer protective template (11), and there is a gap between the two outer walls at the corner of the support extension fixing member (73) and the two outer walls at the corner of the prefabricated finished product waiting platform (3). There is a gap between the outer wall of the prefabricated finished product waiting platform (3) and the outer protective template (11) that is smaller than the shortest side of the smallest prefabricated part.

5. A prefabricated component lifting and conveying system for prefabricated buildings according to claim 2, characterized in that: The corner column (71) extends to the corner of the top extension frame (13). When the lifting component (72) drives the precast finished product waiting platform (3) to move to the highest position, the top extension frame (13) is located inside the precast finished product waiting platform (3), and the surface of the top extension frame (13) is flush with the surface of the precast finished product waiting platform (3).

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