Rebar component installation device and construction method

Abstract

The application provides a reinforcing part mounting device and a construction method, which comprises a stand column, an integrated platform arranged at the middle or upper part of the outer wall of the stand column, a plurality of stirrup pieces stacked on the integrated platform, a lifting base in sliding connection with the stand column, the lifting base being arranged below the integrated platform and being lifted along the stand column, the lifting base being used for placing longitudinal reinforcement, and the longitudinal reinforcement being used for penetrating through the integrated platform and being connected with the stirrup pieces respectively. In use, the longitudinal reinforcement is connected with the first stirrup piece at the top respectively, the lifting base is lifted by a distance, the longitudinal reinforcement is connected with the second stirrup piece, the longitudinal reinforcement is sequentially connected with the subsequent stirrup pieces, the reinforcing part is prepared, the lifting tool is connected with the reinforcing part, the reinforcing part is hoisted as a whole to the pouring bin surface, the reinforcing part is aligned with the end of the longitudinal reinforcement in the previous pouring bin surface, and the connection is fixed, and the mounting of the reinforcing part is completed through the above steps. While ensuring the machining precision, the requirement for equipment is reduced.

Description

Technical Field

[0001] This invention relates to the field of bridge pier construction equipment and methods, and in particular to a steel reinforcement component installation device and construction method. Background Technology

[0002] As bridge spans increase, the height and cross-sectional dimensions of existing bridge piers are also growing, making the construction of steel reinforcement components increasingly challenging. Currently, the main construction methods for bridge pier steel reinforcement components are in-situ binding and prefabrication / hoisting. Prefabrication / hoisting includes precast formwork, block splicing, and sheet bending. In-situ binding is labor-intensive and inefficient. Precast formwork involves using a formwork for positioning, binding the steel reinforcement together, hoisting it into place, and then removing the formwork. This method has a high lifting capacity and relatively low construction efficiency. Block splicing involves disassembling the steel reinforcement components into multiple independent blocks, processing each block in a factory, and then assembling the blocks together. However, this method has many joints, affecting construction efficiency and increasing steel consumption. For example, CN 112589011 A describes a method for manufacturing polygonal variable cross-section bridge tower steel reinforcement components based on block assembly. The sheet bending method involves first processing crisscrossing mesh sheets in a steel reinforcement factory, then using a bending machine to bend multiple mesh sheets and connect them to form a steel reinforcement component. This method is difficult to implement and requires sophisticated equipment. Due to the varying cross-sectional dimensions of piers, automating the overall bending of the mesh sheets is challenging, especially for variable cross-section steel reinforcement components. For example, CN109183628 B describes a method for manufacturing steel reinforcement components for ultra-large variable cross-section cable towers. Therefore, there is a need to develop an installation method that is less demanding on equipment, has good versatility, and can be universally adapted to various pier structures with both uniform and variable cross-sections. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a steel reinforcement component installation device and construction method, which can simplify the equipment structure, reduce construction costs, reduce labor input, improve safety, and especially accelerate the efficiency of longitudinal reinforcement end alignment during hoisting and reduce high-altitude operation time.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a steel reinforcement component installation device, including a column, an integrated platform provided in the middle or upper part of the outer wall of the column, a multi-stirrup plate for stacking on the integrated platform, a lifting base slidably connected to the column, the lifting base being located below the integrated platform and moving up and down along the column, the lifting base being used to place longitudinal bars, and the longitudinal bars being used to pass through the integrated platform and connect to the stirrup plates respectively.

[0005] In the preferred embodiment, multiple stirrup sheets are stacked horizontally on an integrated platform, and the base plate of the integrated platform is a frame structure to facilitate the passage of longitudinal reinforcement. An external construction platform is provided on the outside of the integrated platform.

[0006] In the preferred embodiment, a winch device is provided at the top of the column, and the winch device is connected to the lifting base via a steel wire rope to drive the lifting base to rise and fall; An internal construction platform is also provided on the outer wall of the column.

[0007] In a preferred embodiment, the lifting base is equipped with an electromagnet or positioning block for fixing the bottom end of the longitudinal rib.

[0008] In a preferred embodiment, an end connector is provided at the bottom of each longitudinal bar. The end connector is used to assist in positioning and connecting the ends of the longitudinal bars of the steel reinforcement components in each compartment.

[0009] In the preferred embodiment, the end connector has the following structure: a threaded sleeve is used for threaded connection with the longitudinal reinforcement; A stepped platform is provided at the bottom of the outer wall of the threaded sleeve, and a sliding guide member is provided on the outer wall of the threaded sleeve in opposite directions. A guide bell mouth is provided at the bottom of the sliding guide member. The sliding guide members are connected to each other through connecting holes, and the sliding guide members are also provided with lifting lugs for traction; The sliding guide slides along the outer wall of the threaded sleeve and is limited by the step, on which a shim is provided for adjusting the height of the sliding guide.

[0010] A sleeve tool for driving the rotation of the aforementioned threaded sleeve includes a handle, a third wheel and a second wheel at the front end of the handle, a swing arm hinged to the front end of the handle by a pin, a spring at the pin position to make the swing arm tend to open, a first wheel at the front end of the swing arm, at least two guide wheels and a drive wheel on the handle, the drive wheel being connected to a drive device to drive the drive wheel to rotate, and a friction band passing over the first wheel, the second wheel, the guide wheels and the drive wheel. During operation, the threaded sleeve is located between the first, second, and third wheels and is covered by the friction band.

[0011] A construction method using the above-mentioned steel reinforcement component installation device includes the following steps: S1. The stirrup sheets are manufactured using industrial methods; S2. Hoist the stirrup piece of a steel reinforcement component onto the integrated platform as a whole; S3. Connect the bottom of the longitudinal rib to the threaded sleeve of the end connector; S4. The longitudinal bars pass through the stirrup sheet, and the connection positions of the longitudinal bars and the stirrup sheet are aligned. S5. Connect the longitudinal bars to the top first stirrup piece respectively; S6. Raise the lifting base a certain distance and connect the longitudinal reinforcement to the second stirrup piece; S7. Repeat step 6 to connect the longitudinal bars to the subsequent stirrup pieces in sequence to prepare the steel reinforcement components. S8. Connect the lifting equipment to the steel reinforcement components and lift the steel reinforcement components as a whole onto the pouring surface; S9. Align the steel reinforcement components with the ends of the longitudinal reinforcement bars in the previous pouring section and fix them in place. The installation of the steel reinforcement components is completed by following the steps above.

[0012] In the preferred embodiment, in step S4, the bottom of the longitudinal rib is placed on the lifting base according to the design position, and then the electromagnet on the lifting base is activated to fix the bottom position of the longitudinal rib.

[0013] In the preferred embodiment, in step S9, during the hoisting process, shims of different heights are set on the end connectors at different positions so that the guide bell mouth is aligned with the longitudinal rib end of the previous compartment. After alignment, the front end of the sleeve tool is placed on the threaded sleeve, which is located between the first, second, and third wheels. The threaded sleeve is rotated by the drive wheel and driven by the friction belt, and the ends of the longitudinal ribs of the two compartments are connected through the threaded sleeve.

[0014] This invention provides a rebar component installation device and construction method. By first automatically manufacturing stirrup sheets, and then lifting the longitudinal bars to connect the stirrup sheets to the longitudinal bars to form a complete rebar component, this method ensures processing accuracy while reducing equipment requirements, especially for large equipment. The rebar component installation device of this invention can adapt to piers with different cross-sections and is also compatible with rebar components of equal or variable cross-sections. The end connector is equipped with a sliding guide, which facilitates the alignment of each longitudinal bar and assists in threaded sleeve connection. This reduces the requirements for high-altitude installation equipment and manual operation, facilitating semi-automated construction to improve efficiency. It significantly reduces docking time and improves the strength of the docking position. A dedicated sleeve tool can easily drive the threaded sleeve to rotate, quickly completing the threaded sleeve connection, resulting in higher connection strength compared to binding and welding methods. The construction method of this invention allows steel reinforcement components to be directly hoisted in their original position after being formed on the construction site, without the need for flipping, re-welding and reshaping, or changing the hoisting equipment. This significantly improves installation accuracy and efficiency, reduces labor, and has lower equipment requirements, thus reducing overall construction costs. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a top view of the steel reinforcement component in this invention.

[0016] Figure 2 This is a front view of the steel reinforcement components being hoisted in this invention.

[0017] Figure 3 This is a front view of the end connector in this invention.

[0018] Figure 4 This is a front view of the steel reinforcement component before its preparation in this invention.

[0019] Figure 5 This is a front view of the steel reinforcement component after it has been prepared in this invention.

[0020] Figure 6 This is the front view of the sleeve tool in this invention.

[0021] Figure 7 This is a front view of the sleeve tool in operation according to the present invention.

[0022] In the diagram: 1. Reinforcing bar component; 101. Stirrup plate; 102. Longitudinal reinforcement; 103. Reinforcing structure; 104. Longitudinal reinforcement end; 2. Lifting tool; 3. End connector; 31. Fastening nut; 32. Threaded sleeve; 33. Sliding guide; 34. Connecting hole; 35. Gasket; 36. Guide bell mouth; 4. Inner mold support; 5. Inner mold; 6. Outer mold support; 7. Outer mold; 8. Column; 9. Winch device; 10. Guide wheel; 11. Wire rope; 12. Integrated platform; 13. Lifting base; 14. Outer construction platform; 15. Sleeve tool; 151. Swing arm; 152. First wheel; 153. Friction belt; 154. Second wheel; 155. Pin; 156. Spring; 157. Guide wheel; 158. Drive wheel; 159. Third wheel; 150. Handle; 16. Battery; 17. Inner construction platform. Detailed Implementation

[0023] Example 1: like Figure 1 , 2 In embodiments 4 and 5, a rebar component installation device includes a column 8. An integrated platform 12 is located at the middle or upper part of the outer wall of the column 8. Multiple stirrup pieces 101 are stacked on the integrated platform 12. A lifting base 13 is slidably connected to the column 8, located below the integrated platform 12 and moving up and down along the column 8. The lifting base 13 is used to place longitudinal reinforcement bars 102, which pass through the integrated platform 12 and connect to the stirrup pieces 101 respectively. This structure allows the rebar component 1 to be formed in the manner of installation, eliminating the need for flipping and adjusting for deformation caused by flipping, significantly improving installation efficiency. Furthermore, the spacing of the stirrup pieces 101 and the position of the ends of the longitudinal reinforcement bars 102 can be precisely controlled by the lifting base 13, thereby improving installation accuracy. The integrated platform 12 can be easily processed manually or by a robotic arm, further improving installation efficiency.

[0024] Preferred solutions include Figure 4 In the middle, multiple stirrup pieces 101 are horizontally stacked on the integrated platform 12. The bottom plate of the integrated platform 12 is a frame structure to facilitate the passage of longitudinal reinforcement 102. like Figure 4 In this configuration, an external construction platform 14 is provided on the outer side of the integrated platform 12. Preferably, as shown below... Figure 4 In the middle, an inner construction platform 17 is also provided on the outer wall of column 8.

[0025] Multiple robotic arms are movably mounted on the outer construction platform 14 and the inner construction platform 17, and the stirrup plates 101 and longitudinal bars 102 are connected sequentially by welding, which greatly improves the installation efficiency.

[0026] Preferred solutions include Figure 4 In the middle, a winch device 9 is provided at the top of the column 8, and a guide wheel 10 is also provided. The winch device 9 is connected to the lifting base 13 through a steel wire rope 11 to drive the lifting base 13 to rise and fall. In a preferred embodiment, the lifting base 13 is equipped with an electromagnet or positioning block for fixing the bottom end of the longitudinal rib 102. By placing the longitudinal rib 102 in the designed position and then activating the electromagnet, the precise position of the longitudinal rib end 104 can be ensured, guaranteeing that the longitudinal rib ends 104 between the two compartments are aligned.

[0027] Preferred solutions include Figure 4 In the middle, an end connector 3 is provided at the bottom of each longitudinal bar 102. The end connector 3 is used to assist in positioning and connecting when the ends 104 of the longitudinal bars of each section of the steel reinforcement component 1 are butted.

[0028] Preferred solutions include Figure 3 In the middle, the structure of the end connector 3 is as follows: the threaded sleeve 32 is used for threaded connection with the longitudinal rib 102; A stepped platform is provided at the bottom of the outer wall of the threaded sleeve 32, and a sliding guide 33 connected to the opposite side is provided on the outer wall of the threaded sleeve 32. A guide bell mouth 36 is provided at the bottom of the sliding guide 33. The sliding guide 33 is connected to the other side through the connecting hole 34. The sliding guide 33 is also provided with a lifting lug for traction. The position of the bottom longitudinal rib end 104 can be controlled by the traction rope. After use, the bolt at the connecting hole 34 can be removed from the sliding guide 33, so that the sliding guide 33 can be removed and reused, reducing the use cost of the end connector 3.

[0029] The sliding guide 33 slides along the outer wall of the threaded sleeve 32 and is limited by a step. A shim 35 is provided on the step to adjust the height of the sliding guide 33. This structure allows the bottom of the sliding guide 33 to be at different elevations, so that it can be positioned sequentially during the lowering of the lifting device 2. For example, the bottom of the sliding guide 33 of the inner longitudinal rib 102 is lower, so the docking operation is completed first. Then the lifting device 2 continues to be lowered, and the docking operation of the outer longitudinal rib 102 is completed, which greatly improves the efficiency of the docking operation.

[0030] Example 2: After the longitudinal rib ends 104 are joined, the threaded sleeve needs to be rotated to connect the longitudinal rib ends 104 together. Existing tools are inconvenient to operate. While some existing technologies use friction belts, the operation of putting the friction belt on and removing it from the threaded sleeve is cumbersome. Therefore, a special tool has been developed. Figure 6 , 7 A sleeve tool for driving the rotation of the aforementioned threaded sleeve includes a handle 150. A third wheel 159 and a second wheel 154 are provided at the front end of the handle 150. A swing arm 151 is hinged to the front end of the handle 150 via a pin 155. A spring 156 is also provided at the pin 155 to encourage the swing arm 151 to open. A first wheel 152 is provided at the front end of the swing arm 151. The first wheel 152, the second wheel 154, and the third wheel 159 form a "Y"-shaped structure. At least two guide wheels 157 and a drive wheel 158 are also provided on the handle 150. The guide wheels 157 are located near the drive wheel 158 and are arranged opposite each other. The drive wheel 158 is connected to a drive device to drive its rotation. A friction band 153 passes over the first wheel 152, the second wheel 154, the guide wheels 157, and the drive wheel 158; the friction band 153 passes between the two guide wheels 157. Preferably, the drive wheel 158 is connected to the drive motor via a planetary gear reducer, and a storage battery 16 is also provided on the handle 150, preferably a lithium battery.

[0031] During operation, the Y-shaped opening at the front end of the sleeve tool 15 is aligned with the threaded sleeve 32, so that the threaded sleeve 32 is positioned between the first wheel 152, the second wheel 154, and the third wheel 159 and is covered by the friction band 153. Ingeniously, the sleeve tool 15 of this invention is directional; when... Figure 7 When the friction belt 153 rotates clockwise, the tension of the friction belt 153 causes the swing arm 151 to tend to clamp the threaded sleeve 32, thereby transmitting sufficient torque to the threaded sleeve 32. When the drive motor is activated, it drives the drive wheel 158 to rotate at a speed of 100~600 rpm after being reduced in speed by the planetary gear reducer. Then the friction belt 153 drives the threaded sleeve 32 to rotate.

[0032] Example 3: like Figure 1 , 2 In sections 4 and 5, a construction method using the aforementioned steel reinforcement component installation device includes the following steps: S1. The stirrup sheet 101 is manufactured in an industrialized manner; for example, the steel bars are leveled, cut and bent by an intelligent machine tool to form steel bar unit parts, and the steel bar unit parts are welded into stirrup sheet 101 by an automated robotic arm and positioning processing platform.

[0033] S2. The stirrup piece 101 of a steel reinforcement component 1 is hoisted onto the integrated platform 12 as a whole and placed in a horizontal stacking manner.

[0034] S3. Connect the bottom of the longitudinal rib 102 to the threaded sleeve 32 of the end connector 3; preferably, fit the fastening nut 31 to lock the end connector 3, so as to prevent the end connector 3 from falling off during hoisting or changing its height position.

[0035] S4. The longitudinal reinforcement 102 passes through the stirrup plate 101, and the connection positions of the longitudinal reinforcement 102 and the stirrup plate 101 are aligned. During hoisting, a traction rope is tied to the top end of each longitudinal reinforcement 102 to facilitate pulling the top end of the longitudinal reinforcement 102 to the appropriate position for connection with the stirrup plate 101. During installation, a camera and LiDAR are used to assist in positioning the top end of the longitudinal reinforcement 102 to match the design position.

[0036] Preferred solutions include Figure 4 In the process, the bottom of the longitudinal rib 102 is placed on the lifting base 13 according to the design position, and then the electromagnet on the lifting base 13 is activated to fix the bottom position of the longitudinal rib 102.

[0037] S5. Connect the longitudinal reinforcement 102 to the top first stirrup piece 101 respectively; welding is used here. Manual welding can be performed on the outer construction platform 14 and the inner construction platform 17. Since it is a vertical welding operation at a roughly fixed height, the labor intensity is low. Alternatively, multiple mobile welding robotic arms can be installed on the outer construction platform 14 and the inner construction platform 17 to achieve automated welding, further reducing the labor intensity of construction.

[0038] S6. Raise the lifting base 13 a certain distance to connect the longitudinal rib 102 with the second stirrup piece 101; the distance is the spacing between two adjacent stirrup pieces 101 in the design.

[0039] S7. Repeat step 6 to connect the longitudinal reinforcement 102 to the subsequent stirrup sheet 101 in sequence to prepare the steel reinforcement component 1. S8. Connect the lifting device 2 to the steel reinforcement component 1, and hoist the steel reinforcement component 1 as a whole onto the pouring surface. This is one of the main advantages of the present invention. After the steel reinforcement component 1 is prepared, it can be hoisted as a whole in its original posture, avoiding the process of turning and reshaping required in the prior art, which greatly improves the construction efficiency.

[0040] S9. Align the steel reinforcement component 1 with the longitudinal reinforcement end 104 in the previous pouring section and fix them in place. In the preferred embodiment, during the hoisting process, shims 35 of different heights are provided for the end connectors 3 at different positions to ensure that the guide bell mouth 36 aligns successively with the longitudinal rib end 104 of the previous compartment. A traction rope is used to place the guide bell mouth 36 onto the longitudinal rib end 104 of the previous compartment. Since the sliding guide 33 in this invention can slide up and down, and in this example, it is preferable to position the bottom of the guide bell mouth 36 at different heights, allowing the inner longitudinal rib end 104 to be aligned first, and then the outer longitudinal rib end 104 to be aligned. If necessary, the guide bell mouth 36 can be lifted using the traction rope, adjusted, and then lowered back onto the longitudinal rib end 104, greatly saving alignment and adjustment time and reducing the time required for large hoisting equipment.

[0041] After alignment, the front end of the sleeve tool 15 is fitted onto the threaded sleeve 32, which is located between the first wheel 152, the second wheel 154, and the third wheel 159. The drive wheel 158 rotates, causing the friction belt 153 to rotate the threaded sleeve 32, thus connecting the longitudinal rib ends 104 of the two compartments. This design further improves hoisting efficiency and reduces the time required for large hoisting equipment.

[0042] The installation of steel reinforcement component 1 is completed through the above steps. The construction method of this invention is particularly suitable for the construction of steel reinforcement components for hollow piers, variable cross-section piers, and large pier columns.

[0043] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The embodiments and features described in these embodiments can be arbitrarily combined without conflict. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A steel reinforcement component installation device, characterized in that: Includes a column (8), and an integrated platform (12) is provided in the middle or upper part of the outer wall of the column (8). Multiple stirrup plates (101) are stacked horizontally on an integrated platform (12). The bottom plate of the integrated platform (12) is a frame structure to facilitate the passage of longitudinal reinforcement (102). An external construction platform (14) is provided on the outside of the integrated platform (12). The lifting base (13) is slidably connected to the column (8). The lifting base (13) is located below the integrated platform (12) and moves up and down along the column (8). The lifting base (13) is used to place the longitudinal reinforcement (102). The longitudinal reinforcement (102) is used to pass through the integrated platform (12) and connect to the stirrup sheet (101) respectively. A winch device (9) is provided at the top of the column (8). The winch device (9) is connected to the lifting base (13) via a steel wire rope (11) to drive the lifting base (13) to rise and fall. An internal construction platform (17) is also provided on the outer wall of the column (8); Multiple robotic arms are movably mounted on the outer construction platform (14) and the inner construction platform (17), and the stirrup plates (101) are connected to the longitudinal bars (102) in sequence by welding. The lifting base (13) is equipped with an electromagnet for fixing the bottom end of the longitudinal rib (102); An end connector (3) is provided at the bottom of each longitudinal bar (102). The end connector (3) is used to assist in positioning and connecting the longitudinal bar ends (104) of each reinforcement component (1) when they are joined. The structure of the end connector (3) is as follows: the threaded sleeve (32) is used for threaded connection with the longitudinal reinforcement (102); A step is provided at the bottom of the outer wall of the threaded sleeve (32), and a sliding guide (33) is provided on the outer wall of the threaded sleeve (32) with opposite connections. A guide bell mouth (36) is provided at the bottom of the sliding guide (33). The sliding guide (33) is connected to each other through the connecting hole (34), and the sliding guide (33) is also provided with a lifting lug for traction; The sliding guide (33) slides along the outer wall of the threaded sleeve (32) and is limited by the step. A shim (35) is provided on the step for adjusting the height of the sliding guide (33). It also includes a sleeve tool for driving the rotation of the threaded sleeve, including a handle (150), a third wheel (159) and a second wheel (154) at the front end of the handle (150), a swing arm (151) hinged to the front end of the handle (150) by a pin (155), a spring (156) at the pin (155) to make the swing arm (151) tend to open, and a first wheel (152) at the front end of the swing arm (151), the first wheel (152) and the second wheel (154) The third wheel (159) forms a "Y" shaped structure. At least two guide wheels (157) and a drive wheel (158) are also provided on the handle (150). The drive wheel (158) is connected to the drive device to drive the drive wheel (158) to rotate. The friction belt (153) passes between the two guide wheels (157) and passes around the first wheel (152), the second wheel (154), the guide wheel (157) and the drive wheel (158). During operation, the front end "Y"-shaped opening of the sleeve tool (15) is aligned with the threaded sleeve (32), which is located between the first wheel (152), the second wheel (154) and the third wheel (159) and is covered by the friction band (153).

2. A construction method using the steel reinforcement component installation device as described in claim 1, characterized in that: Includes the following steps: S1. The stirrup sheet is manufactured in an industrialized manner (101). S2. The stirrup piece (101) of a steel reinforcement component (1) is hoisted onto the integrated platform (12) as a whole. S3. Connect the bottom of the longitudinal rib (102) to the threaded sleeve (32) of the end connector (3); S4, the longitudinal reinforcement (102) passes through the stirrup sheet (101), and the longitudinal reinforcement (102) is aligned with the connection position of the stirrup sheet (101); In step S4, the bottom of the longitudinal rib (102) is placed on the lifting base (13) according to the design position, and then the electromagnet on the lifting base (13) is activated to fix the bottom position of the longitudinal rib (102). S5. Connect the longitudinal reinforcement (102) to the top first stirrup piece (101) respectively; S6. Raise the lifting base (13) a certain distance and connect the longitudinal reinforcement (102) with the second stirrup piece (101); S7. Repeat step 6 to connect the longitudinal reinforcement (102) to the subsequent stirrup sheet (101) in sequence to prepare the steel reinforcement component (1). S8. Connect the lifting device (2) to the steel reinforcement component (1) and hoist the steel reinforcement component (1) as a whole to the pouring surface; S9. Align the steel reinforcement component (1) with the end (104) of the longitudinal reinforcement in the previous pouring section and fix them in place; In step S9, during the hoisting process, shims (35) of different heights are set on the end connectors (3) at different positions so that the guide bell mouth (36) is aligned with the longitudinal rib end (104) of the previous compartment. After alignment, the front end of the sleeve tool (15) is placed on the threaded sleeve (32). The threaded sleeve (32) is located between the first wheel (152), the second wheel (154) and the third wheel (159). The threaded sleeve (32) is rotated by the drive wheel (158) and driven by the friction belt (153). The ends (104) of the longitudinal ribs of the two compartments are connected by the threaded sleeve (32). The installation of the steel reinforcement component (1) is completed through the above steps.

Images