Precast steel cage binding formwork for structural columns

Abstract

This invention discloses a precast steel reinforcement cage binding formwork for structural columns, relating to the field of steel reinforcement cage binding technology. It includes a platform frame with multiple parallel support rollers at its upper end. A limiting plate is vertically fixed at one end of the platform frame. A main reinforcement limiting component is adjustable within an annular adjustment hole. The main reinforcement limiting component includes an adjusting beam adjustable within the annular adjustment hole. The adjusting beam has guide holes penetrating both side walls. A portal handle extending into the guide holes is slidably inserted into a sliding hole. Limiting wheels are rotatably inserted at both ends of the portal handle. A gap is left between the two limiting wheels for the main reinforcement to pass through. The positions of the two limiting wheels within the guide holes are adjustable. This invention uses a main reinforcement limiting component to adjust the lateral insertion and binding position of the main reinforcement, ensuring that after passing through the two limiting wheels, the main reinforcement can sequentially pass through multiple stirrups and fit snugly against the stirrup binding position. This eliminates the need for multiple people to collaboratively support the main reinforcement for binding, improving binding efficiency.

Description

Technical Field

[0001] This invention relates to the field of steel cage binding technology, specifically to a precast steel cage binding formwork for structural columns. Background Technology

[0002] The binding of precast steel cages for structural columns is a crucial step in building construction, and its quality and standardization directly affect the load-bearing capacity and overall stability of the structural columns.

[0003] When tying the reinforcing cage of structural columns in buildings, use reinforcing bar tying hooks and tying wire to tie the stirrups to the main bars. When tying, ensure that the ties are in a figure-eight shape and that they are not loose or come off. The joints of the stirrups (where the hooks overlap) should be staggered on the longitudinal bars at the four corners to ensure the overall stability of the reinforcing cage.

[0004] Currently, binding the main reinforcement bars of a steel cage requires at least 2-3 people to lift the bars horizontally and keep them relatively horizontal. Multiple workers need to work together at the same time, which requires a lot of manpower. Moreover, when operating manually, for structural columns with larger diameters, the number of main reinforcement bars in the entire steel cage will be greater, which means that the binding workers will spend more time, the binding efficiency will be lower, and the binding accuracy will be difficult to guarantee. Summary of the Invention

[0005] The purpose of this invention is to provide a precast steel cage binding formwork for structural columns to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a precast steel reinforcement cage binding formwork for structural columns, comprising:

[0007] The platform frame has multiple support rollers that are distributed parallel to each other at the upper end. The support rollers are used to support multiple stirrups to keep them on the same binding horizontal plane.

[0008] One end of the platform frame is vertically fixed with a limiting plate. The limiting plate has an annular adjustment hole. A main rib limiting component is adjustable inside the annular adjustment hole. The main rib limiting component is used for guiding and supporting the main rib.

[0009] The main rib limiting component includes an adjustable beam that is adjustable on an annular adjusting hole. The adjusting beam has a guide insertion hole that penetrates both side walls. A sliding hole is opened on one side wall of the adjusting beam facing the inner wall of the annular adjusting hole. A door-shaped handle that extends into the guide insertion hole is slidably inserted into the sliding hole. Limiting wheels are rotatably inserted into the two ends of the door-shaped handle.

[0010] A gap is left between the two limiting wheels for the main reinforcing bar to pass through;

[0011] The positions of the two limiting wheels within the guide holes are adjustable, and the two limiting wheels can be simultaneously adjusted to any position within the annular adjustment hole, thereby adjusting the position of the main reinforcement bar insertion.

[0012] In a further embodiment, the adjusting beam has rotation notches at both axial ends, and the rotation notches are rotatably engaged with the radial sidewall of the annular adjusting ring.

[0013] A threaded sleeve is fixed to one side wall of the adjusting beam, and a limiting hole communicating with the threaded sleeve is opened at the end of the adjusting beam. A limiting plug is threaded into the threaded sleeve, and a limiting head is provided at the end of the limiting plug that can pass through the limiting hole. A limiting groove is provided on the side wall of the limiting plate at the edge of the annular adjusting ring, and the end of the limiting head engages with the limiting groove at the corresponding position.

[0014] In a further embodiment, a second limiting groove is formed on the side wall of the guide hole facing the sliding hole. The gate-shaped side wall is fixed with a second limiting head that is inserted into the corresponding second limiting groove. The limiting wheel is axially provided with a through hole. The gate-shaped side wall is slidably sleeved with a first disc located in the through hole on both ends. The outer wall of the second limiting head is sleeved with a spring and a second disc located in the through hole. The spring is located between the first disc and the second disc. The second disc is fixedly sleeved with the second limiting head.

[0015] The spring force pushes the second disc in real time, which in turn pushes the limiting head out of the through hole and into the limiting groove.

[0016] In a further embodiment, a support plate for rotating and supporting the support roller is also fixed on the platform frame, and an arc-shaped notch is opened on the upper surface of the support plate to rotate and fit against the outer wall of the support plate.

[0017] In a further embodiment, a plurality of adjusting seats are fixed at the upper end of the platform frame away from the limiting plate, one end of the support roller is rotatably fitted with the side wall of the limiting plate, and the other end is fixed with a pin that is rotatably inserted into the side wall of the adjusting seat.

[0018] In a further embodiment, the adjusting seat has an adjusting sliding hole, and a T-shaped pull block is slidably inserted into the adjusting sliding hole. One end of the pull block is fixedly located in the adjusting sliding hole as a limiting head three. The end of the pin shaft has a rectangular groove that is inserted into the limiting head three.

[0019] The other end of the pull block is located outside the adjustment seat and is fixed with a pull ring.

[0020] In a further embodiment, the platform frame is rotatably provided with a main shaft on both sides, and a connecting rod is fixed at both ends of the main shaft along the axial direction. A crossbar is rotatably provided between the ends of the two connecting rods, and multiple adjusting rods are provided between the main shaft and the crossbar.

[0021] Both ends of the adjusting rod are fixed with collars that are respectively sleeved with the main shaft and the crossbar, and the collars are slidably sleeved with the main shaft;

[0022] Two hinge rods are hinged between the side walls of two adjacent adjusting rods;

[0023] Two hinged rods are also hinged between the connecting rod near the limit plate and the side wall of the nearest adjusting rod;

[0024] The two hinged rods are arranged in an X-shape and are hinged at the intersection.

[0025] In a further embodiment, one of the collars at the end of an adjusting rod away from the limiting plate is threadedly connected to a crossbar, and the end of the crossbar away from the limiting plate rotates through the connecting rod and is connected to an adjusting turntable.

[0026] In a further embodiment, a stirrup straightener is also included, with the stirrup straighteners on both sides used to simultaneously limit multiple stirrups;

[0027] The stirrup straightener includes an adjustable sliding seat on the outer wall of the adjusting rod, a support block fixed on the sliding seat, and a locking plate hinged to both sides of the end of the support block. A torsion spring is provided at the hinge between the locking plate and the support block. The torsional force of the torsion spring causes the locking plate to flip around the hinge position to one side closer to the other, forming a V-shaped structure. The locking plate has a locking notch for locking the side wall of the stirrup edge.

[0028] In a further embodiment, the radial sidewall of the adjusting rod is provided with an adjusting groove with a circular arc cross-section, and the sliding seat is provided with a protrusion that slides and engages with the adjusting groove, the protrusion being tightly fitted to the inner wall of the adjusting groove.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] This invention relates to a precast steel reinforcement cage binding form for structural columns. Support rollers are used to support multiple stirrups, maintaining them on the same binding plane. Based on the required binding position of the main reinforcement, the orientation of the adjusting beam in the annular adjusting hole is adjusted. Then, a sliding gate-shaped handle along the sliding hole drives two limiting wheels to synchronously adjust their positions within the guide insertion holes. This adjusts the specific position of the main reinforcement, ensuring that after passing through the two limiting wheels, the main reinforcement can sequentially pass through multiple stirrups and fit snugly with the stirrup binding position, reducing binding position errors. This allows for support operation at one end of the main reinforcement. Only the other end of the main reinforcement needs to be bound to one stirrup at the very end of the steel cage, forming a two-point support for the main reinforcement. No multiple people are needed to coordinate the binding operation; a single person can bind the remaining stirrups and main reinforcement sequentially. The above steps are repeated continuously to bind the remaining number of main reinforcements, improving binding efficiency and reducing worker input. Attached Figure Description

[0031] Figure 1This is a schematic diagram of the main structure of the present invention;

[0032] Figure 2 This is a partial structural diagram of the present invention;

[0033] Figure 3 This is a schematic diagram of the main rib limiting component of the present invention;

[0034] Figure 4 This is a schematic diagram of the main rib limiting component of the present invention.

[0035] Figure 5 This is a schematic diagram of the door handle structure of the present invention;

[0036] Figure 6 This is a schematic diagram of the adjusting rod structure of the present invention;

[0037] Figure 7 For the present invention Figure 1 Enlarged view of the structure at point A in the middle;

[0038] Figure 8 This is a schematic diagram of the stirrup straightener structure of the present invention;

[0039] Figure 9 This is a partial sectional view of the stirrup straightener of the present invention;

[0040] Figure 10 This is a schematic diagram showing the distribution of the two clamping plates of the stirrup straightener of the present invention, ensuring they remain on the same plane.

[0041] Figure 11 This is a diagram showing the initial state of the two clamping plates of the stirrup straightener of the present invention;

[0042] Figure 12 This is a schematic diagram of the disassembled structure of the support roller, adjusting seat, and pull-out block of the present invention.

[0043] In the diagram: 1. Platform frame; 11. Support plate; 2. Support roller; 21. Pin; 22. Adjusting seat; 23. Pull-out block; 24. Limiting head three; 25. Pull ring; 3. Limiting plate; 31. Limiting groove one; 4. Adjusting beam; 41. Door handle; 42. Limiting insert; 43. Limiting wheel; 44. Threaded sleeve; 45. Limiting groove two; 46. Limiting head one; 47. Limiting head two; 48. Disc two; 49. Disc one; 410. Spring; 5. Main shaft; 51. Connecting rod; 52. Crossbar; 53. Adjusting rod; 531. Adjusting groove; 54. Ring; 55. Adjusting turntable; 56. Hinge rod; 6. Sliding seat; 61. Support block; 62. Card plate; 63. Protrusion. Detailed Implementation

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] This embodiment provides a precast steel reinforcement cage binding formwork for structural columns, such as... Figure 1 As shown, it includes: platform frame 1, with multiple support legs on the bottom wall of platform frame 1 to ensure stable support of platform frame 1.

[0046] The reinforcing cage consists of multiple stirrups arranged in sequence and main reinforcement bars interspersed within and tied together with the stirrups. Therefore, it is crucial to ensure that the stirrups are stably and evenly spaced. Thus, multiple parallel support rollers 2 are installed at the upper end of the platform frame 1 to support the stirrups and maintain them on the same horizontal binding plane. Because the stirrups have a small diameter, they cannot be perpendicular to the support rollers 2 and require auxiliary alignment.

[0047] Therefore, a main shaft 5 is rotatably mounted on both sides of the platform frame 1. Connecting rods 51 are fixed at both ends of the main shaft 5 along its axial direction. A crossbar 52 is rotatably mounted between the ends of the two connecting rods 51. Multiple adjusting rods 53 are provided between the main shaft 5 and the crossbar 52. The main shaft 5 can rotate around the side wall at the end of the platform frame 1. Figure 1 As shown, the main shaft 5 on one side drives the crossbar 52 to tilt to an inclined state via the connecting rod 51, while the main shaft 5 on the other side drives the crossbar 52 to tilt to a vertical state via the connecting rod 51. In other words, when the main shaft 5 and the crossbar 52 are adjusted to be directly above the side of the platform frame 1, protective fences are formed on both sides of the platform frame 1.

[0048] Furthermore, each end of the adjusting rod 53 is fixed with a collar 54 that is respectively fitted onto the main shaft 5 and the crossbar 52. The collar 54 is slidably fitted onto the main shaft 5. Two hinge rods 56 are hinged between the side walls of two adjacent adjusting rods 53. Two hinge rods 56 are also hinged between a connecting rod 51 near the limiting plate 3 and the side wall of the nearest adjusting rod 53. The two hinge rods 56 are distributed in an X-shape and are hinged at an intersection. The multiple adjusting rods 53 are linked together by the intersecting hinge rods 56. As long as the last adjusting rod 53 is pulled along the axial direction of the main shaft 5 or the crossbar 52, the end of the hinge rod 56 rotates with the side wall of the adjusting rod 53, and the gap between two adjacent adjusting rods 53 is adjusted.

[0049] To ensure that the gap between two adjacent adjusting rods 53 is not arbitrarily adjusted after adjustment, one of the collars 54 at the end of the adjusting rod 53 furthest from the limiting plate 3 is threadedly connected to the crossbar 52. The end of the crossbar 52 furthest from the limiting plate 3 rotates through the connecting rod 51 and connects to the adjusting turntable 55. This means that rotating the adjusting turntable 55 with one hand will rotate the crossbar 52, causing the inner wall of the collar 54 threaded to the crossbar 52 to rotate relative to it. This collar 54 will adjust its position along the axial direction of the crossbar 52. The collar 54 at the other end of the same adjusting rod 53 will slide synchronously along the main shaft 5. Adjacent adjusting rods 53 are linked by a hinge rod 56, enabling all adjusting rods 53 to adjust their positions synchronously. Releasing the adjusting turntable 55 stops the collar 54 from adjusting its position, thus preventing further arbitrary adjustments to the position of the adjusting rods 53.

[0050] After the adjusting rod 53 is adjusted to the correct position, it also includes a stirrup straightener, such as... Figure 7 and Figure 8 As shown, the stirrup straighteners on both sides are used to limit the position of multiple stirrups at the same time. The stirrup straightener installed on each adjusting rod 53 is used to limit the position of the edge of each stirrup. Therefore, the gap between two adjacent adjusting rods 53 represents the gap between two adjacent stirrups.

[0051] Specifically, such as Figure 7 , Figure 8 and Figure 9 As shown, the stirrup straightener includes an adjustable sliding seat 6 mounted on the outer wall of the adjusting rod 53, a support block 61 fixed on the sliding seat 6, and a locking plate 62 hinged to both sides of the end of the support block 61. A torsion spring is provided at the hinge between the locking plate 62 and the support block 61. In the initial state, the torsional force of the torsion spring causes the locking plate 62 to flip around the hinge position towards one side, forming a V-shaped structure, such as... Figure 10 As shown, the clamping plate 62 has a clamping notch for clamping the side wall of the stirrup edge. After rotating the main shaft 5 and the crossbar 52 to directly above the side of the platform frame 1, acting as a protective fence, the clamping plates 62 of the stirrup straighteners on both sides are set opposite each other, and the clamping notch is used to clamp the stirrups relative to the side walls of the two side edges. Thus, together with multiple support rollers 2, a limit is formed on the stirrups in addition to the limit on the upper side wall. Furthermore, according to the requirements of the spacing between two adjacent stirrups on the entire steel cage, the gap between two adjacent adjusting rods 53 can be adjusted to adjust the gap between two adjacent clamping plates 62 on the same side, thereby adjusting the gap between two adjacent stirrups to meet the binding requirements. This frees the workers' hands when binding, eliminating the need to hold the stirrups with their hands during the binding operation.

[0052] An adjustment groove 531 with a circular arc cross-section is provided on the radial side wall of the adjustment rod 53. The sliding seat 6 is provided with a protrusion 63 that slides and engages with the adjustment groove 531. The protrusion 63 fits tightly against the inner wall of the adjustment groove 531. Since different steel cages have different sizes, the sizes of the tied stirrups also vary. Therefore, the position of the clamping plate 62 needs to be determined according to the size of the stirrups. Here, the support block 61 can be pushed along the axial direction of the adjustment rod 53, which will push the protrusion 63 connected to the sliding seat 6 to slide synchronously along the adjustment groove 531, thereby adjusting the position of the clamping plate 62 and ensuring that the engagement notch of the clamping plate 62 can be accurately engaged on the side wall of the stirrup edge.

[0053] Specifically, in the binding operation of the columnar steel cage of the ring structure, the two clamping plates 62 connected on the same support block 61 are affected by the torque of the torsion spring, and will appear as follows: Figure 11 The V-shaped structure shown allows the notch on the clamping plate 62 to fit more closely to the sidewall of the stirrup edge of the annular structure. When binding the reinforcing cage of a rectangular column structure, simultaneously engaging the two clamping plates 62 connected to the support block 61 with the same sidewall of the stirrup edge of the rectangular structure allows the two clamping plates 52 to rotate around their hinged position with the support block 61, flipping from a V-shaped structure to a straight structure, as shown. Figure 10 As shown, it can fit more closely to the sidewalls of the stirrups on the rectangular structure.

[0054] After the positions of the stirrups are determined, the next step is to perform the binding and positioning of the main reinforcement bars, such as... Figure 1 As shown, a limiting plate 3 is vertically fixed at one end of the platform frame 1. An annular adjustment hole is provided on the limiting plate 3. A main rib limiting component is adjustable inside the annular adjustment hole. The main rib limiting component is used for guiding and supporting the main rib.

[0055] Specifically, such as Figure 2 , Figure 3 and Figure 4 As shown, the main reinforcement limiting component includes an adjustable beam 4 that is adjustablely set on an annular adjusting hole. The adjusting beam 4 has a guide insertion hole that penetrates both side walls. A sliding hole is opened on one side wall of the adjusting beam 4 facing the inner wall of the annular adjusting hole. A gate-shaped handle 41 that extends into the guide insertion hole is slidably inserted into the sliding hole. The two ends of the gate-shaped handle 41 are rotatably inserted into limiting wheels 43. A through gap is left between the two limiting wheels 43 for the main reinforcement to pass through.

[0056] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the two limiting wheels 43 are adjustable in position within the guide hole, and can be synchronously adjusted to any position within the annular adjustment hole, thereby adjusting the position of the main reinforcement bar insertion. Specifically, as... Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, both ends of the adjusting beam 4 are provided with rotation notches, which are rotatably engaged with the radial sidewall of the annular adjusting ring. A threaded sleeve 44 is fixed to one sidewall of the adjusting beam 4, and a limiting hole communicating with the threaded sleeve 44 is provided at the end of the adjusting beam 4. A limiting plug 42 is threaded into the threaded sleeve 44, and a limiting head 46 that can pass through the limiting hole is provided at the end of the limiting plug 42. A limiting groove 31 located at the edge of the annular adjusting ring is provided on the sidewall of the limiting plate 3, and the end of the limiting head 46 is engaged with the corresponding limiting groove 31. Furthermore, a limiting groove 45 is provided on the side wall of the guide hole facing the sliding hole. The two end side walls of the portal handle 41 are fixed with limiting heads 47 that are inserted into the corresponding limiting grooves 45. The limiting wheel 43 is provided with a through hole in the axial direction. The outer walls of the two end outer walls of the portal handle 41 are slidably sleeved with discs 49 located in the through holes. The outer wall of the limiting head 47 is sleeved with a spring 410 and discs 48 located in the through holes. The spring 410 is located between discs 49 and discs 48. Discs 48 are fixedly sleeved with the limiting head 47. The elastic force of the spring 410 pushes discs 48 in real time, thereby pushing the limiting head out of the through hole and into the limiting groove 45.

[0057] When adjusting the position of the limit wheel 43, first adjust the position of the adjusting beam 4, and then adjust the position of the limit wheel 43. Specifically, hold the limit handle 42 with one hand and rotate it within the threaded sleeve 44, disengaging the first limit head 46 from the first limit groove 31. The adjusting beam 4 loses its limit and can then rotate along the annular adjusting hole to adjust its position. Next, hold the gantry handle 41 and pull it up slightly, causing the second limit head 47 to disengage from the corresponding second limit groove 45. During this process, the gantry handle 41 slides relative to the first disc 49, and the second disc 48 slides synchronously with the second limit head 47, allowing it to approach the disc. Compression spring 410 generates rebound potential energy. Sliding handle 41 along the sliding hole adjusts the position of the two limiting wheels 43. Once the insertion gap is determined, release handle 41. Using the spring force of spring 410, insert limiting head 47 back into the corresponding limiting groove 45. Simultaneously, rotate limiting handle 42 along threaded sleeve 44 to screw limiting head 46 into the corresponding limiting groove 31. At this point, the positions of adjusting beam 4 and limiting wheels 43 are fixed. The main reinforcement can then pass between the two limiting wheels 43 and continue to be pulled laterally. Adjusting beam 4 acts as a support for one end of the main reinforcement. After passing through the two limiting wheels 43, the main reinforcement can pass through multiple stirrups in sequence and fit snugly against the stirrup binding position, reducing binding position errors and achieving support operation for one end of the main reinforcement. Simply tie the other end of the main reinforcement bar to one of the stirrups at the very end of the steel cage to form two-point support for the main reinforcement bar. No multiple people are needed to work together to erect the main reinforcement bar for tying. One person can tie the remaining stirrups to the main reinforcement bar in sequence.

[0058] In summary, the support roller 2 is used to support multiple stirrups to maintain the same horizontal binding plane, and the clamping plate 62 limits the stirrups. According to the binding position of the main reinforcement, the support position of the main reinforcement limiting component is adjusted. There is no need for multiple people to work together to lift the main reinforcement for binding. A single person can bind the remaining stirrups and main reinforcement in sequence. The above steps are repeated continuously to bind the remaining number of main reinforcements in sequence, which improves binding efficiency and reduces the amount of workers required.

[0059] In this embodiment, as Figure 1 As shown, a support plate 11 for rotating and supporting the support roller 2 is also fixed on the platform frame 1. The upper end face of the support plate 11 has an arc-shaped notch that rotates and fits against the outer wall of the support plate 11, thereby enhancing the support strength of the support roller 2.

[0060] Furthermore, such as Figure 12As shown, multiple adjusting seats 22 are fixed at the upper end of the platform frame 1, away from the limiting plate 3. One end of the support roller 2 is rotatably attached to the side wall of the limiting plate 3, and the other end is fixed with a pin 21 that rotatably inserts into the side wall of the adjusting seat 22. The adjusting seat 22 has an adjusting sliding hole, and a T-shaped pull block 23 is slidably inserted into the adjusting sliding hole. One end of the pull block 23 is fixed to a limiting head 24 located in the adjusting sliding hole. The end of the pin 21 has a rectangular groove that inserts into the limiting head 24. The other end of the pull block 23 is located outside the adjusting seat 22 and is fixed with a pull ring 25. When it is necessary to bind the steel cage of the circular structure, the stirrups are circular, so the following method is used: Figure 1 The two support rollers 2 shown serve as support components for the rolling of the reinforcing cage. When it is necessary to change the binding position of the main reinforcement, the support rollers 2 need to be rotated to drive the stirrups to rotate, thereby changing the binding position of the main reinforcement. At this time, the pull ring 25 can be pulled with one hand, and the pull block 23 can be pulled along the adjusting slider of the adjusting seat 22 to pull the limiting head 24 out of the rectangular groove of the pin 21. The support rollers 2 lose their constraint, and the stirrups can be rolled manually. The support rollers 2, which can rotate freely, can be used to change the position of the stirrups, making it convenient to bind the main reinforcement.

[0061] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A precast steel reinforcement cage binding formwork for structural columns, characterized in that, include: Platform frame (1), the upper end of which is provided with multiple support rollers (2) that are distributed in parallel to each other. One end of the platform frame (1) is vertically fixed with a limiting plate (3), and the limiting plate (3) is provided with an annular adjustment hole, and the main rib limiting component is adjustable in the annular adjustment hole; The main rib limiting component includes an adjustable beam (4) that is adjustable on an annular adjusting hole. The adjustable beam (4) has a guide insertion hole that penetrates both side walls. The adjustable beam (4) has a sliding hole on one side wall facing the inner wall of the annular adjusting hole. A door-shaped handle (41) extending into the guide insertion hole is slidably inserted into the sliding hole. Limiting wheels (43) are rotatably inserted into the two ends of the door-shaped handle (41). A gap is left between the two limiting wheels (43) for the main reinforcement to pass through; The two limiting wheels (43) can be adjusted synchronously at any position within the annular adjustment hole, thereby adjusting the position of the main reinforcement bar insertion; The platform frame (1) has a main shaft (5) rotatably mounted on both sides. The main shaft (5) has connecting rods (51) fixed at both ends in the axial direction. A crossbar (52) is rotatably mounted between the ends of the two connecting rods (51). Multiple adjusting rods (53) are mounted between the main shaft (5) and the crossbar (52). Both ends of the adjusting rod (53) are fixed with collars (54) that are respectively connected to the main shaft (5) and the crossbar (52); Two hinge rods (56) are hinged between the side walls of two adjacent adjusting rods (53). Two hinge rods (56) are also hinged between the connecting rod (51) near the limiting plate (3) and the side wall of the nearest adjusting rod (53).

2. The precast steel cage binding formwork for structural columns according to claim 1, characterized in that, The adjusting beam (4) has rotation notches at both ends along its axial direction; One end of the adjusting beam (4) is fixed with a threaded sleeve (44), and a limit plug (42) is threaded into the threaded sleeve (44). The end of the limit plug (42) is provided with a limit head (46) that can pass through the limit hole. The side wall of the limit plate (3) is provided with a limit groove (31) located at the edge of the annular adjusting ring. The end of the limit head (46) is engaged with the limit groove (31) at the corresponding position.

3. The precast steel cage binding formwork for structural columns according to claim 2, characterized in that, The guide hole has a second limiting groove (45) on the side wall facing the sliding hole. The two end side walls of the door handle (41) are fixed with a second limiting head (47) that is inserted into the corresponding second limiting groove (45). The limiting wheel (43) has a through hole in the axial direction. The two end outer walls of the door handle (41) are slidably sleeved with a disc (49) located in the through hole. The outer wall of the second limiting head (47) is sleeved with a spring (410) and a disc (48) located in the through hole. The disc (48) is fixedly sleeved with the second limiting head (47).

4. The precast steel cage binding formwork for structural columns according to claim 1, characterized in that, One of the collars (54) at the end of an adjusting rod (53) away from the limiting plate (3) is threaded to the crossbar (52).

5. The precast steel cage binding formwork for structural columns according to claim 4, characterized in that, It also includes stirrup straighteners, with stirrup straighteners on both sides used to simultaneously limit multiple stirrups.

6. The precast steel cage binding formwork for structural columns according to claim 5, characterized in that, The stirrup straightener includes a sliding seat (6) adjustable on the outer wall of the adjusting rod (53), a support block (61) fixed on the sliding seat (6), and a plate (62) hinged to both sides of the end of the support block (61).

7. The precast steel cage binding formwork for structural columns according to claim 6, characterized in that, A torsion spring is provided at the hinge between the card plate (62) and the support block (61). The torsional force of the torsion spring causes the card plate (62) to flip around the hinge position to the side that is closer to each other, forming a V-shaped structure.

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