A new type of folding lifting device and its construction method

Abstract

A new type of folding lifting device and its construction method, the support mechanism includes a chassis and a plurality of vertical rods fixed on the chassis; the drive mechanism includes a transmission gear and a belt disc gear set; the lifting mechanism includes a semicircular gear, a movable connecting rod and a support disc; the movable connecting rods are cross-linked to form an extensible connecting rod group, and are connected between adjacent support discs; a plurality of telescopic rods for supporting stirrups are arranged on the outer side of each support disc; the transmission gear drives the rotation of the chassis gear, and then drives the overall rotation of the belt disc gear set; the top disc gear in the belt disc gear set drives all the semicircular gears engaged therewith to swing, the semicircular gears drive the connecting rod group connected therewith through the rod part to extend and retract, and then drive the support disc and the stirrup placed on the telescopic rod to lift together, realizing the need at different positions. The stirrup can be smoothly lifted and accurately positioned, the structure is stable; the construction efficiency is high and safe, the application range is wide and it can be reused.

Description

Technical Field

[0001] This application belongs to the technical field of auxiliary equipment for building engineering, and in particular relates to a novel folding lifting device and its construction method. Background Technology

[0002] In the construction of building structures, the reinforcement binding of vertical components such as frame columns and structural columns is a crucial step, especially the installation and adjustment of column stirrups, which directly affects the load-bearing capacity and structural safety of the columns. Traditional stirrup installation methods mainly rely on manual operation. During construction, at least two workers are usually required: one worker lifts the stirrups stacked at the bottom of the column one by one and manually adjusts them to the design-specified spacing; the other worker simultaneously uses wire to bind and fix the adjusted stirrups to the main reinforcement of the column.

[0003] This traditional construction method has many drawbacks: First, it is labor-intensive and costly. Lifting the stirrups requires multiple workers to repeatedly perform strenuous lifting operations, and the physical exertion increases dramatically with column height. Second, it is inefficient. The manual lifting and tying processes involve waiting for each other, resulting in low coordination and severely hindering project progress. Third, it is difficult to guarantee positional accuracy. Manual lifting and positioning rely entirely on the workers' experience and sense of responsibility, easily leading to quality problems such as uneven stirrup spacing, tilting, or misalignment, thus creating potential structural safety hazards. Fourth, it poses extremely high safety risks. When the columns are high, workers often need to climb up by stepping on incompletely secured stirrups or temporary scaffolding. This process lacks reliable safety protection measures, greatly increasing the risk of falls from height and posing a serious threat to the lives of construction workers.

[0004] Therefore, in order to solve the problems of low efficiency, poor accuracy, insufficient safety and high cost in the traditional manual installation of stirrups, there is an urgent need for an auxiliary mechanical device that can automatically, accurately and safely lift stirrups. Summary of the Invention

[0005] This application provides a novel folding lifting device and its construction method, aiming to solve the technical problems of low efficiency, poor accuracy, insufficient safety and high cost in the traditional manual installation of stirrups.

[0006] To solve at least one of the above-mentioned technical problems, the technical solution adopted in this application is:

[0007] A novel folding and lifting device includes:

[0008] The support mechanism includes a chassis and multiple uprights fixed to the chassis;

[0009] The drive mechanism, mounted on the chassis, includes a transmission gear rotatably mounted on the chassis and a disc gear set disposed on the chassis shaft, wherein the transmission gear meshes with a chassis gear in the disc gear set;

[0010] The lifting mechanism includes multiple semi-circular gears, multiple movable connecting rods, and multiple support plates; each semi-circular gear is pivotally connected to the top of its corresponding upright and meshes with the top plate gear in the gear set with discs; the movable connecting rods are interlocked to form a telescopic connecting rod group and are connected between adjacent support plates; multiple telescopic rods for supporting stirrups are telescopically provided on the outside of each support plate.

[0011] The transmission gear drives the chassis gear to rotate, which in turn drives the entire belt gear set to rotate; the top gear in the belt gear set drives all the semi-circular gears meshing with it to swing, and the semi-circular gear drives the connecting rod set pivotally connected to it to extend and retract through its rod, which in turn drives the support plate and the stirrups pre-placed on the telescopic rod to rise and fall together to achieve the needs of different positions.

[0012] Furthermore, the transmission gear is vertically arranged at the center of the chassis and connected to a fixed seat on the chassis via its transmission shaft; the end of the transmission shaft is provided with an outwardly extending rotating handle, which drives the rotating handle and the transmission gear to rotate via the transmission shaft.

[0013] Furthermore, there are four sets of uprights, evenly distributed on the surface of the chassis and connected to each other by a horizontal cross; the journal shaft of the disc gear set is embedded in the hole shaft in the cross and is located directly above the center of the chassis.

[0014] Furthermore, the chassis gear is connected to the top gear via the journal shaft to form the disc gear set; the chassis gear meshes perpendicularly with the transmission gear, converting the horizontal rotation of the transmission gear into the vertical rotation of the disc gear set; the tooth grooves of the top gear are upward-facing annular structures, concentrically distributed on a turntable surface; the semi-circular gear meshes directly with the tooth grooves of the top gear.

[0015] Furthermore, an upwardly inclined bracket is provided on the inner side of the top of the upright, and the suspended end of the inclined bracket is pivotally connected to the middle of the semi-circular gear through a connecting nail, providing a swing fulcrum for the semi-circular gear; and the rod of each semi-circular gear is also connected to two movable connecting rods that are inclined toward the center of the chassis; the movable connecting rods are all located above the gear set with disc.

[0016] Furthermore, the movable link is a V-shaped structure formed by a short rod and a long rod pivotally connected at the end or middle of the long rod, and the end of the short rod is pivotally connected to the rod portion of the semi-circular gear.

[0017] Furthermore, the support plate has a regular hexagonal structure, and is pivotally connected to the middle of the long rod in the movable connecting rod through multiple sets of diagonal rods fixed on its inner side.

[0018] Furthermore, telescopic rods are provided on the four sets of opposite outer surfaces of the support plate, and the telescopic rods extend outward along the normal direction of the outer wall edge of the support plate.

[0019] Furthermore, in the height direction of the linkage assembly, a set of support plates is provided at both the top and bottom, with the support plates arranged in pairs in the middle.

[0020] A construction method employing the novel folding and lifting device as described above includes the following steps:

[0021] S1: Weld the upright and the fixed base to the chassis, install the transmission gear, the disc gear set and the semi-circular gear in sequence, and hinge the movable connecting rod to the support plate into a whole by connecting nails, and finally install the telescopic rod on the outside of the support plate;

[0022] S2: Place the assembled device in the center of the column reinforcement cage to be constructed, pull the telescopic rod out from the outside of the support plate, place the column stirrups to be installed in layers according to the construction sequence, and make the four corners of the stirrups clamp onto the telescopic rod;

[0023] S3: The operator rotates the handle used to drive the transmission gear, which drives the transmission gear to rotate. Through the sequentially meshing disc gear set and the semi-circular gear, the movable connecting rod is extended, thereby raising the entire folded lifting mechanism along with the stirrups on it. When the lowest set of stirrups is raised to the first spacing specified in the design, the rotation is stopped, and the construction personnel fix and tie the stirrups. Then, the handle is rotated again to raise the next set of stirrups. This process is repeated until all stirrups are raised and tied.

[0024] S4: After completing the binding of all the stirrups, push the telescopic rod back to the side of the support plate, rotate the rotating handle in the opposite direction to retract the lifting mechanism to the lowest state, and then take the device out of the column steel cage so that it can be transferred to the next construction site for reuse.

[0025] This application discloses a novel folding lifting device that combines a unique gear meshing transmission with a folding telescopic structure to achieve smooth lifting and precise positioning of stirrups. Its support structure is stable and reliable; the drive mechanism is labor-saving and smooth in transmission; and the lifting mechanism is synchronous, precise, stable, and highly adaptable. This device not only achieves precise positioning of the stirrups, ensuring construction quality, but also significantly reduces manpower, lowers labor intensity, and improves construction efficiency. Furthermore, it fundamentally avoids the risks of workers climbing to heights, greatly enhancing construction safety. Simultaneously, the device's stable structure and precise control effectively prevent quality problems such as stirrup tilting and displacement, ensuring the quality of column construction. In addition, the device has a wide range of applications, is reusable, and generates no construction waste during construction, conforming to the concept of green and environmentally friendly construction, and possesses high practical value and promising prospects for promotion. This application also proposes a construction method for this novel folding lifting device. Attached Figure Description

[0026] Figure 1 This is a perspective view of a folding lifting device according to this application;

[0027] Figure 2 This is a top view of the folding lifting device in this application;

[0028] Figure 3 This is a side view of the folding and lifting device from one angle in this application;

[0029] Figure 4 This is a side view of the folding and lifting device from another angle in this application;

[0030] Figure 5 This is a perspective view of the transmission gear in this application;

[0031] Figure 6 This is a perspective view of the rotary handle in this application;

[0032] Figure 7 This is a three-dimensional view of the supporting structure in this application;

[0033] Figure 8 This is a perspective view of the disc-shaped gear assembly in this application;

[0034] Figure 9 This is a perspective view of the lifting mechanism in this application;

[0035] Figure 10 This is a perspective view of the movable link in this application.

[0036] In the diagram: 100, Device; 10, Support mechanism; 11, Chassis; 12, Upright pole; 13, Inclined frame; 14, Cross; 15, Fixed base; 20, Drive mechanism; 21, Transmission gear; 22, Transmission shaft; 23, Rotating handle; 24, Gear set with disc; 241, Chassis gear; 242, Turntable; 243, Top plate gear; 244, Neck shaft; 30, Lifting mechanism; 31, Semi-circular gear; 32, Movable connecting rod; 33, Support plate; 34, Telescopic rod; 35, Connecting pin; 36, Inclined rod. Detailed Implementation

[0037] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0038] This embodiment proposes a novel folding lifting device 100, such as... Figures 1-4 As shown, it mainly consists of three parts: support mechanism 10, drive mechanism 20 and lifting mechanism 30.

[0039] like Figure 1 , Figure 2 and Figure 7 As shown, the support mechanism 10 includes a chassis 11 and multiple uprights 12 fixed on the chassis 11, serving as the base of the entire device. In this embodiment, there are four sets of uprights 12, evenly distributed on the surface of the chassis 11 and interconnected by horizontal crossbars 14. This crossbar connection structure significantly enhances the overall stability and rigidity of the support mechanism 10, ensuring that it can reliably bear the entire weight of the lifting mechanism 30 and its upper stirrups, and providing a stable mounting foundation for other components. The journal shaft 244 of the disc gear set 24 is fitted into the hole shaft in the crossbar 14, ensuring that it is located directly above the center of the chassis 11, guaranteeing the symmetry and smoothness of the drive.

[0040] like Figure 1 , Figures 5-8 As shown, the drive mechanism 20 is mounted on the chassis 11 and includes a transmission gear 21 rotatably mounted on the chassis 11 and a gear set 24 with a disc gear disposed at the center of the chassis 11. Specifically, the transmission gear 21 is vertically disposed at the center of the chassis 11 and is connected to a fixed seat 15 fixed on the chassis 11 via its transmission shaft 22. The transmission shaft 22 is a hollow shaft that passes horizontally through the fixed seat 15 and extends toward the outer edge of the chassis 11; its end has a... Figure 6 The rotating handle 23 is shown. The rotating handle 23 has a Z-shaped structure, including a solid hexagonal rod that mates with a hexagonal hole at the end of the drive shaft 22. Its grip section is a round rod, ergonomically designed for easy operation. The operator can drive the rotating handle 23 from the ground or operating platform, which in turn drives the transmission gear 21 to rotate via the drive shaft 22. This design allows the operator to easily and effortlessly control the entire lifting process from outside the device, avoiding work at heights.

[0041] like Figure 8 As shown, the disc gear set 24 consists of a base gear 241 and a top gear 243. The base gear 241 is connected to the top gear 243 via a journal shaft 244, and the transmission gear 21 meshes with the base gear 241 in the disc gear set 24. The teeth of the base gear 241 are vertically arranged, and it meshes perpendicularly with the transmission gear 21, which also has vertically arranged teeth. This perpendicular meshing method can smoothly convert the horizontal rotation of the transmission gear 21 into the vertical rotation of the disc gear set 24 around the journal shaft 244. The tooth grooves of the top gear 243 are upward-facing annular structures, concentrically distributed on the surface of a turntable 242. This structure allows the meshing components to move synchronously in the same plane, that is, the teeth of the semi-circular gear 31 directly mesh with the tooth grooves of the top gear 243.

[0042] like Figure 1 , Figure 3 , Figure 4 and Figure 9 As shown, the lifting mechanism 30 is the core part for realizing the lifting of the stirrups, which includes multiple semi-circular gears 31, multiple movable connecting rods 32, and multiple support plates 33.

[0043] The teeth of the semi-circular gear 31 directly mesh with the upward-facing tooth grooves of the top plate gear 243. On the inner top of each upright 12, an upward-sloping bracket 13 is provided. The suspended end of this bracket 13 is pivotally connected to the center of the semi-circular gear 31 via a connecting pin 35, providing a pivot point for the semi-circular gear 31 to swing. This design not only ensures the precision of gear meshing but also optimizes the force transmission path, allowing the semi-circular gear 31 to swing smoothly.

[0044] A semi-circular gear 31 is pivotally connected to the top of its corresponding upright 12 and meshes with the top plate gear 243 in the disc gear set 24; movable connecting rods 32 are interlocked to form a telescopic connecting rod group, which is connected between adjacent support plates 33; multiple telescopic rods 34 for supporting stirrups are telescopically provided on the outer side of each support plate 33. The rod of each semi-circular gear 31 is also connected to two movable connecting rods 32 that are inclined toward the center of the base plate 11; the movable connecting rods 32 serve as the foundation of the connecting rod group and need to ensure that the semi-circular gear 31 meshes with the top plate gear 243, and thus need to ensure that all movable connecting rods 32 are located above the disc gear set 24.

[0045] The transmission gear 21 drives the chassis gear 241 to rotate, which in turn drives the entire disc gear set 24 to rotate. The top disc gear 243 in the disc gear set 24 drives all the semi-circular gears 31 that mesh with it to swing. The semi-circular gears 31 drive the connecting rod group pivotally connected to them to extend and retract through their rods, which in turn drives the support plate 33 and the stirrups pre-placed on the telescopic rod 34 to rise and fall together, so as to meet the needs of different positions.

[0046] like Figure 9 As shown, the movable link 32 is the basic unit that makes up the link assembly. Figure 10 As shown, each movable link 32 consists of a short rod and a long rod pivotally connected at the end or middle of the long rod to form a V-shaped structure. For the movable link 32 pivotally connected to the semi-circular gear 31, the end of its short rod is pivotally connected to the rod portion of the semi-circular gear 31; and the other end of the short rod is directly pivotally connected to the end of the long rod. The movable links 32 within the link group are pivotally connected to each other at the ends or middle of the short and long rods, forming a telescopic folding structure. This V-shaped hinge structure makes the entire link group extremely flexible and stable during extension and retraction, effectively and evenly transmitting the swing of the semi-circular gear 31 to each support plate 33. In other words, it can effectively change the overall length of the link group when the semi-circular gear 31 swings, thereby achieving the lifting function. In this field, this interconnected hinge method is a commonly used pivoting method in vertically folding telescopic structures, and will not be described in detail further; the accompanying drawings are omitted.

[0047] like Figure 9 As shown, the support plate 33 has a regular hexagonal structure, which is symmetrical and has good stability. Each support plate 33 is pivotally connected to the middle of the long rod in the movable connecting rod 32 via connecting nails 35 through multiple sets of diagonal rods 36 fixed on its inner side. This multi-point connection method ensures the stability of the support plate 33 during the lifting process and prevents tilting due to uneven force. In the height direction of the connecting rod group, there is a set of support plates 33 at the top and bottom, and the middle of each set consists of two adjacent support plates 33. This multi-level arrangement allows the device to support and lift multiple stirrups simultaneously, significantly improving construction efficiency.

[0048] like Figure 2 and Figure 9 As shown, each of the four opposing outer surfaces of each support plate 33 is equipped with a telescopic rod 34. The telescopic rod 34 extends outward along the normal direction of the outer wall edge of the support plate 33 and is pivotally connected to the support plate 33 to support the suspended stirrups. Because the support plate 33 has a hexagonal structure, a telescopic rod 34 is provided on each of its upper, lower, left, and right aligned surfaces. The extension length of the telescopic rod 34 and its outward tilt angle relative to the outer edge of the support plate 33 can be adjusted based on site conditions. The telescopic rod 34's telescopic and adjustable characteristics allow it to flexibly adapt to column stirrups of different cross-sectional sizes, improving the versatility of the device. The four corners of the stirrups can be securely fastened to the telescopic rod 34, preventing them from slipping or swaying during lifting and lowering.

[0049] The transmission process of the entire device 100 is as follows: The operator turns the handle 23, which drives the transmission gear 21 to rotate via the transmission shaft 22. The transmission gear 21 drives the chassis gear 241, which meshes with it perpendicularly, to rotate, thereby driving the entire disc gear set 24 (including the top disc gear 243) to rotate synchronously vertically. The rotation of the top disc gear 243 drives all the semi-circular gears 31 meshing with it to swing synchronously around their fulcrum on the inclined frame 13. The rod of the semi-circular gear 31 drives the entire linkage group to extend or retract via the movable connecting rod 32 pivotally connected to it. The movement of the linkage group ultimately drives all the support discs 33 fixed on them, together with the stirrups pre-placed on the telescopic rod 34, to rise and fall smoothly, thereby accurately delivering the stirrups to any desired binding height on the column.

[0050] A construction method employing the novel folding lifting device 100 as described above includes the following steps:

[0051] S1: First, assemble device 100.

[0052] First, weld the upright 12 and the fixed base 15 to the chassis 11, and then install the cross 14. Next, install the transmission gear 21, the disc gear set 24, and the semi-circular gear 31 in sequence, ensuring accurate gear meshing. Then, hinge the movable connecting rod 32 to the support plate 33 to form a lifting mechanism 30 using connecting pins 35. Finally, install multiple sets of telescopic rods 34 on the outside of the support plate 33.

[0053] S2: Then position the device 100 and place the stirrups.

[0054] The assembled device 100 is hoisted or manually transported and placed at the center of the column reinforcement cage to be constructed. Based on the column's cross-sectional dimensions, each expansion joint 34 is pulled out from the outside of the support plate 33 to the appropriate length. Then, the column stirrups to be installed are placed layer by layer on the expansion joint 34 according to the construction sequence from bottom to top, ensuring that all four corners of each stirrup are securely fastened to the expansion joint 34.

[0055] S3: Then raise and tie the stirrups.

[0056] The operator stands in a safe area and turns the handle 23 to drive the transmission gear 21. The gear 21 rotates, and through the sequentially meshing disc gear set 24 and semi-circular gear 31, the movable connecting rod 32 extends, thus smoothly raising the entire folding lifting mechanism 30 along with the stirrups. When the lowest set of stirrups is raised to the first spacing position specified in the design, the rotation stops. At this point, the construction personnel can fix and tie this set of stirrups to the column's main reinforcement. After tying, the handle is turned again to raise the next set of stirrups. This process is repeated until all stirrups are raised to the designed position and tied.

[0057] S4: Final recovery device 100.

[0058] After all the stirrups are tied, push each telescopic rod 34 back and store it to the side of the support plate 33. Then, turn the handle 23 in the opposite direction to make the lifting mechanism 30 smoothly retract to its lowest folded state. Finally, remove the device 100 from the tied column reinforcement cage and it can be transferred to the next column location that needs to be constructed for continued use.

[0059] This application discloses a novel folding lifting device that combines a unique gear meshing transmission with a folding telescopic structure to achieve smooth lifting and precise positioning of stirrups. Its support structure is stable and reliable; the drive mechanism is labor-saving and smooth in transmission; and the lifting mechanism is synchronous, precise, stable, and highly adaptable. This device not only achieves precise positioning of the stirrups, ensuring construction quality, but also significantly reduces manpower, lowers labor intensity, and improves construction efficiency. Furthermore, it fundamentally avoids the risks of workers climbing to heights, greatly enhancing construction safety. Simultaneously, the device's stable structure and precise control effectively prevent quality problems such as stirrup tilting and displacement, ensuring the quality of column construction. In addition, the device has a wide range of applications, is reusable, and generates no construction waste during construction, conforming to the concept of green and environmentally friendly construction, and possesses high practical value and promising prospects for promotion. This application also proposes a construction method for this novel folding lifting device.

[0060] The embodiments of this application have been described in detail above. These descriptions are merely preferred embodiments and should not be construed as limiting the scope of this application. All equivalent variations and modifications made within the scope of this application should still fall within the patent coverage of this application.

Claims

1. A novel folding and lifting device, characterized in that, include: The support mechanism includes a chassis and multiple uprights fixed to the chassis; The drive mechanism, mounted on the chassis, includes a transmission gear rotatably mounted on the chassis and a disc gear set disposed on the chassis shaft, wherein the transmission gear meshes with a chassis gear in the disc gear set; The lifting mechanism includes multiple semi-circular gears, multiple movable connecting rods, and multiple support plates; each semi-circular gear is pivotally connected to the top of its corresponding upright and meshes with the top plate gear in the gear set with discs; the movable connecting rods are interlocked to form a telescopic connecting rod group and are connected between adjacent support plates; multiple telescopic rods for supporting stirrups are telescopically provided on the outside of each support plate. The transmission gear drives the chassis gear to rotate, which in turn drives the entire belt gear set to rotate; the top gear in the belt gear set drives all the semi-circular gears meshing with it to swing, and the semi-circular gear drives the connecting rod set pivotally connected to it to extend and retract through its rod, which in turn drives the support plate and the stirrups pre-placed on the telescopic rod to rise and fall together to achieve the needs of different positions.

2. The novel folding and lifting device according to claim 1, characterized in that, The transmission gear is vertically arranged at the center of the chassis and connected to a fixed seat on the chassis via its transmission shaft; the end of the transmission shaft is provided with an outwardly extending rotating handle, which drives the transmission gear to rotate via the transmission shaft.

3. A novel folding and lifting device according to claim 1 or 2, characterized in that, There are four sets of uprights, which are evenly distributed on the surface of the chassis and connected to each other by a horizontal cross; the journal shaft of the gear set with disc is embedded in the hole shaft in the cross and is located directly above the center of the chassis.

4. A novel folding and lifting device according to claim 3, characterized in that, The chassis gear is connected to the top gear via the journal shaft to form the disc gear set; the chassis gear meshes perpendicularly with the transmission gear, converting the horizontal rotation of the transmission gear into the vertical rotation of the disc gear set; the tooth grooves of the top gear are upward-facing annular structures, concentrically distributed on a turntable surface; the semi-circular gear meshes directly with the tooth grooves of the top gear.

5. A novel folding and lifting device according to any one of claims 1-2 and 4, characterized in that, An upwardly inclined bracket is provided on the inner side of the top of the upright. The suspended end of the inclined bracket is pivotally connected to the middle of the semi-circular gear through a connecting nail, providing a swing fulcrum for the semi-circular gear. Furthermore, the rod of each semi-circular gear is connected to two movable connecting rods that are inclined toward the center of the chassis. The movable connecting rods are all located above the gear set with disc.

6. A novel folding and lifting device according to claim 5, characterized in that, The movable link is a V-shaped structure formed by a short rod and a long rod pivotally connected at the end or middle of the long rod, and the end of the short rod is pivotally connected to the rod of the semi-circular gear.

7. A novel folding lifting device according to claim 6, characterized in that, The support plate has a regular hexagonal structure and is pivotally connected to the middle of the long rod in the movable connecting rod through multiple sets of diagonal rods fixed on its inner side.

8. A novel folding and lifting device according to claim 7, characterized in that, Telescopic rods are provided on the four opposite outer surfaces of the support plate, and the telescopic rods extend outward along the normal direction of the outer wall edge of the support plate.

9. A novel folding and lifting device according to claim 5, characterized in that, In the height direction of the linkage assembly, a set of support plates is provided at the top and bottom, with the support plates arranged in pairs in the middle.

10. A construction method employing a novel folding lifting device as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: Weld the upright and the fixed base to the chassis, install the transmission gear, the disc gear set and the semi-circular gear in sequence, and hinge the movable connecting rod to the support plate into a whole by connecting nails, and finally install the telescopic rod on the outside of the support plate; S2: Place the assembled device in the center of the column reinforcement cage to be constructed, pull the telescopic rod out from the outside of the support plate, place the column stirrups to be installed in layers according to the construction sequence, and make the four corners of the stirrups clamp onto the telescopic rod; S3: The operator rotates the handle used to drive the transmission gear, which drives the transmission gear to rotate. Through the sequentially meshing disc gear set and the semi-circular gear, the movable connecting rod is extended, thereby raising the entire folded lifting mechanism along with the stirrups on it. When the lowest set of stirrups is raised to the first spacing specified in the design, the rotation is stopped, and the construction personnel fix and tie the stirrups. Then, the handle is rotated again to raise the next set of stirrups. This process is repeated until all stirrups are raised and tied. S4: After completing the binding of all the stirrups, push the telescopic rod back to the side of the support plate, rotate the rotating handle in the opposite direction to retract the lifting mechanism to the lowest state, and then take the device out of the column steel cage so that it can be transferred to the next construction site for reuse.

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