A box girder roof steel bar binding mobile workbench and a method for using the same
By designing a mobile work platform for tying the top slab reinforcement of box girders, and utilizing ground rail components and automated mechanisms to achieve automated movement and spacing positioning of the ring-shaped transverse reinforcement, the problem of reliance on manual operation in existing technologies is solved, and the tying efficiency and accuracy are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- COMMUNICATIONS CONSTRUCTION CO OF CSCEC 7TH DIVISION CORP LTD
- Filing Date
- 2023-05-26
- Publication Date
- 2026-06-26
AI Technical Summary
In existing technologies, when tying the steel reinforcement frame for the top slab of a box girder, the movement and spacing of the annular transverse reinforcement bars rely entirely on manual labor, resulting in time-consuming, labor-intensive, and inaccurate work.
A mobile workbench for binding top plate reinforcement of box girders was designed, including a ground rail assembly, a lifting support assembly, a mobile platform, a clamping mechanism, a cantilever mechanism, and a lifting cantilever mechanism. The movement and spacing positioning of the annular transverse reinforcement are realized through automated control.
It enables automated movement and precise positioning of the ring-shaped transverse ribs, improving binding efficiency and labor intensity, reducing manual intervention, and ensuring the accuracy and efficiency of the binding process.
Smart Images
Figure CN116603953B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of box girder reinforcement tying technology, and in particular to a movable workbench for tying top slab reinforcement of box girders. Background Technology
[0002] In the manufacturing process of box girders, top slab reinforcement frames and U-shaped reinforcement frames are used to splice and assemble a reinforcement skeleton. The top slab reinforcement frame is composed of several parallel longitudinal reinforcement bars and several annular transverse reinforcement bars tied together. In existing technology, during tying, the annular transverse reinforcement bars need to be manually inserted into the longitudinal reinforcement bars from one end and moved until several transverse reinforcement bars are evenly distributed on the longitudinal reinforcement bars. Finally, each annular transverse reinforcement bar is tied to the longitudinal reinforcement bars to form the top slab reinforcement frame. In this process, the insertion of the longitudinal reinforcement bars and the movement of the annular transverse reinforcement bars are entirely manual, and the tied part needs to be lifted so that the part of the annular transverse reinforcement bar below the longitudinal reinforcement bars can move smoothly. Because the above process is entirely manual, it is time-consuming and labor-intensive, and the spacing of the annular transverse reinforcement bars during tying is often inaccurate or lacks precision.
[0003] Chinese invention patent CN111644544A discloses a movable precast box girder top slab rebar tying jig and its usage method, including a bracket, a toothed plate, and a positioning component. The bracket has mounting plates on both sides at the top. The toothed plate is vertically mounted on the mounting plate via the positioning component. The positioning component includes positioning nuts, positioning sleeves, and pins. Positioning nuts are spaced apart on the toothed plate, and positioning sleeves are spaced apart on the mounting plate, corresponding to the positioning nuts. The pins are L-shaped bent rods configured with the positioning nuts and positioning sleeves. This invention can improve the accuracy of rebar tying, speed up construction, and significantly reduce the time spent on the beam-making platform and box girder formwork. It offers high safety and good economic benefits. However, in practical use, it still suffers from low automation. The spacing and movement of the annular transverse rebars during tying still require manual labor, and the lifting of the longitudinally positioned rebars to facilitate the movement of the annular transverse rebars also relies on manual labor. Summary of the Invention
[0004] To address the shortcomings in the aforementioned background technology, this invention proposes a movable workbench for tying top slab reinforcement in box girders, which solves the problem that the movement and spacing positioning of the annular transverse reinforcement during the tying of top slab reinforcement in the prior art relies entirely on manual labor.
[0005] The technical solution of this invention is implemented as follows:
[0006] A movable workbench for binding top plate reinforcement of box girder includes two sets of parallel ground rail assemblies. The workbench is characterized by further including several sets of lifting support assemblies located between the two sets of ground rail assemblies and arranged along the length of the ground rail assemblies. A first movable platform movably spanning the lifting support assemblies is movably mounted on the two sets of ground rail assemblies. A second movable platform is movably mounted on the first movable platform. The first movable platform has cantilever mechanisms on both sides of its front end and a support frame at its rear end. The second movable platform has clamping mechanisms on both sides of its front end and a lifting cantilever mechanism at its front end, located in front of the clamping mechanisms. A limit switch is mounted on the lifting cantilever mechanism.
[0007] Preferably, each set of ground rail components includes at least one ground rail; the first moving platform includes a first pallet, the two ends of which are respectively connected to two sliding platforms, the two ends of the second moving platform are respectively movably mounted on the two sliding platforms, and a gap is left between the middle of the second moving platform and the first pallet; a lifting rod mechanism is located at the front end of the sliding platform; a first moving wheel is rotatably mounted under the sliding platform, the first moving wheel is mounted on the ground rail, and the first moving wheel is connected to a first driver mounted on the sliding platform.
[0008] Preferably, the lifting mechanism includes a lifting arm that is hinged to the front end of the platform at its middle section, one end of the lifting arm is hinged to the telescopic end of the first hydraulic rod, and the first hydraulic rod is fixedly mounted on the slide table; under the telescopic action of the first hydraulic rod, the other end of the lifting arm performs a lifting action.
[0009] Preferably, the second mobile platform includes a second pallet, which is arranged parallel to the first pallet. Both ends of the second pallet are connected to two support platforms. The support platforms slide longitudinally with a slide rail on the slide platform via a slider. A linear motor is provided on the slide platform, and the transmission direction of the linear motor is consistent with the length direction of the slide rail. The support platform is connected to the transmission end of the linear motor. The second pallet is provided with a guardrail.
[0010] Preferably, the clamping mechanism includes at least one slide rod that is laterally slidably disposed at the front end of the support platform. The end of the slide rod is provided with a clamping block. The clamping blocks on the two support platforms are correspondingly disposed. The clamping blocks are connected to a second hydraulic rod disposed at the front end of the support platform. The extension and retraction direction of the second hydraulic rod is the same as the sliding direction of the slide rod. An arc-shaped groove is provided on the clamping block.
[0011] Preferably, the lifting cantilever mechanism includes a cantilever, the middle of which is connected to the telescopic part of a third hydraulic rod fixed on the second moving platform. One end of the cantilever is connected to a slide bar arranged parallel to the third hydraulic rod, and the slide bar is slidably inserted into a sleeve fixed on the second moving platform. The other end of the cantilever is provided with a forearm, and a limit switch is provided on the forearm.
[0012] Preferably, two limit switches are provided, and the two limit switches are respectively provided on both sides of the forearm; the bracket is an L-shaped bracket, and at least two brackets are provided, one end of the bracket is fixedly connected to the first support plate, and the other end faces the front of the first support plate, and several shallow grooves are provided on the bracket at equal intervals.
[0013] Preferably, the lifting support assembly includes a rectangular frame, with a sidewall lifting mechanism vertically sliding on one set of opposite sides and a lateral lifting mechanism vertically sliding on the other set of opposite sides; the sidewall lifting mechanism includes a first pneumatic push rod vertically fixed on the rectangular frame, the telescopic part of the first pneumatic push rod being connected to an L-shaped support plate, and the two sides of the L-shaped support plate being slidably engaged with slide rails vertically set on the rectangular frame via sliders; the lateral lifting mechanism includes a second pneumatic push rod vertically fixed on the rectangular frame, the telescopic part of the second pneumatic push rod being connected to an arched support plate, and the two sides of the arched support plate being slidably engaged with slide rails vertically set on the rectangular frame via sliders; the upper part of the arched support plate is provided with a horizontal plate, and several channel steel support blocks are provided on both sides of the horizontal plate.
[0014] Preferably, the horizontal plate has several steel bar grooves, and the rectangular frame includes four columns arranged in a rectangular shape with their bottoms connected to the base plate.
[0015] A method for using a movable work platform for binding the top slab reinforcement of a box girder includes the following steps:
[0016] S1: Preparation: Place several ring-shaped horizontal bars to be tied on the support, then place the longitudinal bars parallel between the two sets of ground rail components. Support the longitudinal bars by adjusting the support height of different lifting support components. Pass the front end of the longitudinal bars through all the ring-shaped horizontal bars to be tied, and make the end of the longitudinal bars flush with the front end of the first moving platform. Manually tie the first ring-shaped horizontal bar at the front end of the longitudinal bars. The lifting cantilever mechanism descends to the initial height, and the construction personnel squat on the second moving platform. The second moving platform moves to the rear of the first moving platform and stops moving when the limit switch is triggered. At this time, the clamping mechanism corresponds to the frontmost ring-shaped horizontal bar to be tied on the support.
[0017] S2: Clamping and Moving: The two clamping mechanisms operate synchronously, clamping the ring-shaped transverse reinforcement to be tied from both sides. The lifting mechanism lifts up the tied longitudinal reinforcement and the ring-shaped transverse reinforcement to prevent the longitudinal reinforcement from pressing on the clamped ring-shaped transverse reinforcement and affecting its movement. Next, the second moving platform carries the ring-shaped transverse reinforcement clamped by the two clamping mechanisms to the front end of the first moving platform. The movement stops when the previous tied ring-shaped reinforcement triggers the limit switch.
[0018] S3: Manual binding: The cantilever mechanism lowers the already bound longitudinal steel bars and ring-shaped transverse bars and presses them onto the ring-shaped transverse bars to be bound held by the clamping mechanism. The construction workers squat down on the second moving platform and manually bind the ring-shaped transverse bars. After binding, the clamping mechanism releases its grip on the ring-shaped transverse bars.
[0019] S4: Reset action: The lifting arm mechanism lifts the limit switch, and the second moving platform moves back to the tail of the first moving platform. After passing the already tied annular cross rib, the lifting arm mechanism lowers the limit switch to the initial height. When the limit switch is triggered by the annular cross rib to be tied on the bracket as the second moving platform moves, the second moving platform stops moving.
[0020] S5: Repeat steps S2 to S4 above. When there are too many tied annular transverse bars, causing the second moving platform to have too small a range of movement, move the first moving platform towards the tail end of the longitudinal reinforcement bar. This expands the area of the longitudinal reinforcement bar on the first moving platform that has not been tied with annular transverse bars, thus enabling the subsequent tying process. During the movement of the first moving platform, the lifting support components in the direction of movement are lowered one by one to avoid collisions with the first moving platform. The lifting support components that the first moving platform has passed over are restored to the state of supporting the longitudinal and transverse reinforcement bars. Repeat the above process until the entire top slab reinforcement tying work is completed.
[0021] The beneficial effects of this invention are:
[0022] By setting up a first moving platform and a ground rail assembly, the entire workbench can be controlled to move as the binding progress changes. The support can support the unbound annular transverse ribs and move them with the first moving platform for easy access during binding.
[0023] The second moving platform can move on the first moving platform, thereby enabling the clamping mechanism to clamp the untied annular transverse reinforcements set on the support, and move them along the longitudinal direction of the reinforcements to the position to be tied under the drive of the second moving platform.
[0024] The system is equipped with a lifting cantilever mechanism and limit switches. The limit switches can identify the positions of the tied and untied rebars during the movement of the second moving platform, thereby enabling precise positioning and controlling the spacing between the tied and untied rebars. The lifting cantilever mechanism can lift the limit switches after tying one rebar and lower them when moving the next untied rebar, preventing interference and collision with the previous tied rebar during movement.
[0025] The lifting mechanism can lift the tied longitudinal steel bars and annular transverse bars when the second moving platform moves back and forth. When the second moving platform drives the clamping mechanism to clamp the annular transverse bars, it avoids friction between the annular transverse bars and the longitudinal steel bars, which would make the movement inconvenient.
[0026] In addition, several sets of lifting support components are laid on the ground between the two sets of ground rail components along their length. This allows the longitudinal steel bars and the already tied steel bar frame to be automatically lifted as the first moving platform moves with the binding progress, thus preventing the longitudinal steel bars from contacting the first moving platform and affecting its movement.
[0027] This method can automate the movement and spacing positioning of the annular transverse reinforcement along the longitudinal reinforcement using a workbench. The entire moving and positioning process is automated, and the longitudinal reinforcement and the already tied reinforcement frame can be automatically lifted during manual tying, which improves tying efficiency and reduces labor intensity. It solves the problem that the movement and spacing positioning of the annular transverse reinforcement during the tying of the top slab reinforcement frame in the existing technology is entirely dependent on manual labor. Attached Figure Description
[0028] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0029] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0030] Figure 2 This is a side view of the three-dimensional structure of the present invention;
[0031] Figure 3 This is an enlarged schematic diagram of the three-dimensional structure of the present invention;
[0032] Figure 4 This is a schematic diagram of the lifting mechanism and clamping mechanism of the present invention;
[0033] Figure 5 This is a schematic diagram of the lifting cantilever mechanism of the present invention;
[0034] Figure 6 This is a schematic diagram showing the arrangement of the bracket and the annular transverse ribs of the present invention;
[0035] Figure 7 This is a schematic diagram of the lifting support assembly structure of the present invention. Detailed Implementation
[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.
[0037] like Figure 1 , 2 As shown in Figures 3 and 4, in Embodiment 1, a movable workbench for binding the top slab reinforcement of a box girder includes two sets of parallel ground rail assemblies 1. Each set of ground rail assemblies 1 includes at least one ground rail. In this embodiment, each set of ground rail assemblies 1 includes two parallel ground rails, which can form a more stable support. A first movable platform 2 is movably mounted on both sets of ground rail assemblies 1. A cantilever mechanism 4 is provided on both sides of the front end of the first movable platform 2. The cantilever mechanism can lift the bound longitudinal reinforcement and annular transverse reinforcement when the second movable platform moves back and forth, making it easier for the annular transverse reinforcement to move with the clamping mechanism, preventing friction between the annular transverse reinforcement and the longitudinal reinforcement from hindering movement. By setting the first movable platform 2 and the ground rail assemblies 1, it is possible to control the movement of the entire workbench as the binding progress changes. The rear end of the first moving platform 2 is provided with a support 26. The ring-shaped transverse bars to be tied are placed on the support 26. The longitudinal steel bars pass through all the tied and untied ring-shaped transverse bars. The support 26 can support the untied ring-shaped transverse bars and move with the first moving platform 2, making it convenient to use when tying.
[0038] A second moving platform 3 is movably mounted on the first moving platform 2. Clamping mechanisms 5 are located on both sides of the front end of the second moving platform 3. In use, the second moving platform is moved to the rear end of the first moving platform, and the clamping mechanisms 5 clamp the unbound annular transverse reinforcements mounted on the support 26. Driven by the second moving platform 2, the platform moves along the longitudinal direction of the reinforcing bars to the position to be bound. A lifting cantilever mechanism 6 is located at the front end of the second moving platform 3, in front of the clamping mechanisms 5. A limit switch 25 is mounted on the lifting cantilever mechanism 6. The limit switch can identify the positions of the bound and unbound annular transverse reinforcements during the movement of the second moving platform, enabling precise positioning and controlling the spacing between the unbound and bound annular transverse reinforcements. The lifting cantilever mechanism can lift the limit switch after binding one annular transverse reinforcement and lower it when moving the next unbound annular transverse reinforcement to prevent interference or collision with the previous bound annular transverse reinforcement during movement. Several sets of lifting support components 50 are provided on the ground between the two sets of ground rail components 1. The lifting support components 50 are arranged along the length of the ground rail components 1. The laying range of the lifting support components is consistent with the length range of the ground rail components. They can continuously support the longitudinal steel bars and the tied steel bar frames to keep them at a suitable height. They can also automatically lift the longitudinal steel bars and the tied steel bar frames one by one as the first moving platform moves with the binding progress, so as to avoid the longitudinal steel bars from contacting the first moving platform or the ring transverse bars and affecting their movement.
[0039] In this embodiment, the method of using the movable workbench for binding the top slab reinforcement of the box girder includes the following steps:
[0040] Preparation: Place several ring-shaped transverse reinforcements to be tied on the support 26. Then, place the longitudinal reinforcement parallel between the two sets of ground rail assemblies 1. Support the longitudinal reinforcement by adjusting the support height of different lifting support assemblies 50. Pass the front end of the longitudinal reinforcement through all the ring-shaped transverse reinforcements to be tied, and make the end of the longitudinal reinforcement flush with the front end of the first moving platform 2. Manually tie the first ring-shaped transverse reinforcement at the front end of the longitudinal reinforcement. The lifting cantilever mechanism 6 descends to the initial height. At the initial height, the limit switch can be triggered by the ring-shaped transverse reinforcement while moving along the guide rail. The construction worker squats on the second moving platform 3. The second moving platform 3 moves to the rear of the first moving platform 2 and stops moving when the limit switch 25 is triggered. At this time, the clamping mechanism corresponds to the foremost ring-shaped transverse reinforcement to be tied on the support 26.
[0041] Clamping and moving: The two clamping mechanisms 5 operate synchronously, clamping the ring-shaped transverse bars to be tied from both sides. The lifting mechanism 4 lifts up the tied longitudinal bars and ring-shaped transverse bars to prevent the longitudinal bars from pressing on the clamped ring-shaped transverse bars and affecting their movement. Next, the second moving platform 3 carries the ring-shaped transverse bars clamped by the two clamping mechanisms 5 to the front end of the first moving platform 2. When the previous tied ring-shaped bar triggers the limit switch 25, the movement stops, realizing precise positioning between adjacent ring-shaped transverse bars at a fixed interval.
[0042] Manual binding: The cantilever mechanism 4 lowers the already bound longitudinal steel bars and ring transverse bars and presses them onto the ring transverse bars to be bound held by the clamping mechanism 5. The construction workers squat down on the second moving platform 3 and manually bind the ring transverse bars. After binding, the clamping mechanism 5 releases its grip on the ring transverse bars.
[0043] Reset Action: The lifting cantilever mechanism 6 lifts the limit switch 25, and the second moving platform 3 moves back to the rear of the first moving platform 2. After passing the already tied annular reinforcing bar, the lifting cantilever mechanism 6 lowers the limit switch 25 to its initial height to prevent obstruction or interference between the lifting cantilever mechanism and the already tied annular reinforcing bar during movement. When the limit switch 25 is triggered by the annular reinforcing bar to be tied on the bracket 26 as the second moving platform 3 moves, the second moving platform 3 stops moving.
[0044] Repeating the above steps, when the number of tied annular transverse reinforcements is too large, causing the second moving platform 3 to have an insufficient range of movement, the first moving platform 2 is moved towards the end of the longitudinal reinforcement, expanding the area of the untied annular transverse reinforcement on the longitudinal reinforcement corresponding to the first moving platform 2, thus facilitating the subsequent tying process. During the movement of the first moving platform 2, the lifting support components 50 in the direction of movement are lowered one by one to avoid collisions with the first moving platform 2. The lifting support components 50 that the first moving platform 2 has passed return to their supporting state for the longitudinal and transverse reinforcements. This process is repeated until the entire top slab reinforcement tying work is completed. This workbench can automatically realize the movement and spacing positioning of the annular transverse reinforcements along the longitudinal reinforcement. The entire moving and positioning process is automated, and it can automatically lift the longitudinal reinforcement and the already tied reinforcement frame during manual tying. During the entire tying process, construction personnel do not need to move themselves; they only need to squat on the second moving platform to tie, improving tying efficiency and reducing labor intensity.
[0045] like Figure 3 , 4 As shown in Embodiment 2, based on Embodiment 1, the first movable platform 2 includes a first support plate 7, with both ends of the first support plate 7 connected to two slide tables 8 respectively. The second movable platform 3 is movably mounted on the two slide tables 8 at both ends, with a gap between the middle of the second movable platform 3 and the first support plate 7. A lifting mechanism 4 is located at the front end of the slide table 8, and the end of the lifting mechanism can move to the gap to lift the longitudinal reinforcing bars. A first movable wheel 9 is rotatably mounted below the slide table 8, and the first movable wheel 9 is mounted on the ground rail assembly 1. The first movable wheel 9 is connected to a first driver mounted on the slide table 8. In this embodiment, the axle of the first movable wheel 9 is connected to the gear of the first driver. The first driver is preferably a servo motor, as servo motors offer more precise driving and stronger driving force.
[0046] The lifting mechanism 4 includes a lifting arm 11 hinged to the front end of the platform 8 at its middle. One end of the lifting arm 11 is hinged to the telescopic end of the first hydraulic rod 12, which is fixedly mounted on the slide table 8. Under the telescopic action of the first hydraulic rod 12, the other end of the lifting arm 11 is lifted. In this embodiment, the lifting arm 11 is a crank-type lifting arm. The crank design of the lifting arm 11 increases the lifting height and provides movement space. As the first hydraulic rod extends, one end of the lifting arm 11 moves to the gap between the middle of the second moving platform 3 and the first support plate 7, and is lifted below the longitudinal reinforcing bars. The distance between the lifting arm 11 and the clamping mechanism in the longitudinal reinforcing bar direction is equal to the distance between the actual annular transverse reinforcing bars that need to be tied, so that the lifting position of the lifting arm 11 is exactly located on the longitudinal reinforcing bars between adjacent annular transverse reinforcing bars.
[0047] In this embodiment, when the first moving platform 2 needs to move, the first driver drives the first moving wheel 9 to move along the ground rail. When it is necessary to lift the tied longitudinal reinforcing bars and annular transverse reinforcing bars, the first hydraulic rod 12 retracts, and the other end of the lifting arm 11 lifts the longitudinal reinforcing bars, thereby lifting the longitudinal reinforcing bars together with the annular transverse reinforcing bars. When it is necessary to lower them, the first hydraulic rod 12 extends, causing one end of the lifting arm to rise and the other end to fall, thereby separating them from the longitudinal reinforcing bars and annular transverse reinforcing bars.
[0048] In Example 3, based on Example 2, the second mobile platform 3 includes a second support plate 13, which is parallel to the first support plate 7. Both ends of the second support plate 13 are connected to two platforms 51. The platforms 51 slide longitudinally along a slide rail on a slide table 8 via sliders. A linear motor 15 is mounted on the slide table 8, with its transmission direction aligned with the length direction of the slide rail. The platforms 51 are connected to the transmission ends of the linear motors 15. A guardrail 14 is provided on the second support plate 13, allowing workers to squat on it during construction. The guardrail 14 provides safety protection for the workers. When the second mobile platform 3 needs to move, the two linear motors 15 drive the two platforms 51 to slide under the guidance of the sliders and slide rails. Optionally, limit sensors that cooperate with the platforms 51 are provided at both ends of the slide table 8 to limit the maximum movement range of the second mobile platform 3 on the first mobile platform.
[0049] The clamping mechanism 5 includes at least one slide rod 16 laterally slidable at the front end of the support platform 51. The end of the slide rod 16 is provided with a clamping block 18. The clamping blocks 18 on the two supports 51 are correspondingly arranged. Each clamping block 18 is connected to a second hydraulic rod 17 located at the front end of the support platform 51. The extension and retraction direction of the second hydraulic rod 17 is the same as the sliding direction of the slide rod 16. The clamping blocks 18 have arc-shaped grooves 19. When clamping the annular transverse rib, the second hydraulic rods 17 on both sides extend, causing the two clamping blocks 18 to move relative to each other, thereby clamping the ends of the annular transverse rib. During clamping, the arc-shaped grooves 19 of the clamping blocks 18 fit against the sides of the annular transverse rib, making the clamping more stable and maintaining the verticality of the annular transverse rib.
[0050] like Figure 5As shown in Embodiment 4, based on Embodiment 3, the lifting cantilever mechanism 6 includes a cantilever 20. The middle part of the cantilever 20 is connected to the telescopic part of the third hydraulic rod 21 fixed on the second moving platform 3. Specifically, the front end of the second support plate 13 is connected to a first mounting block 70 and a second mounting block 71. The third hydraulic rod 21 is fixed on the first mounting block 70. One end of the cantilever 20 is connected to a slide bar 22 arranged parallel to the third hydraulic rod 21. The slide bar 22 is slidably inserted into a sleeve 23 fixed on the second mounting block 71. The other end of the cantilever 20 is provided with a small arm 24, and a limit switch 25 is provided on the small arm 24. After the previous annular rib is tied, before the second moving platform 3 moves, the third hydraulic rod 21 extends, causing the cantilever 20 to move upward. The slide bar 22 slides inside the sleeve 23. After the limit switch 25 is higher than the annular rib, the second moving platform opens to move towards the tail. After passing the previous annular rib, the cantilever 20 moves downward and resets as the third hydraulic rod 21 retracts. When it moves to the tail, the limit switch 25 is triggered by the untied annular rib to stop moving.
[0051] like Figure 6 As shown in Embodiment 5, based on Embodiment 4, two limit switches 25 are provided, corresponding to both sides of the forearm 24. The bracket 26 is an L-shaped bracket, with at least two brackets 26 provided. One end of the bracket 26 is fixedly connected to the first support plate 7, and the other end faces forward of the first support plate 7, facilitating the removal of the annular transverse ribs. Several shallow grooves are evenly spaced on the bracket 26. The annular transverse ribs to be bound are placed on the bracket and located within the shallow grooves. The shallow grooves serve as anti-slip and limiting mechanisms, preventing the annular transverse ribs on the bracket from swaying or shifting due to the movement of the first moving platform. Several unbound annular transverse ribs are evenly distributed on the bracket. When the second moving platform moves towards the rear of the first moving platform, it stops when the limit switch on one side of the forearm is triggered by the annular transverse rib hanging on the bracket. At this time, the two clamping blocks are located on both sides of the foremost annular transverse rib on the bracket. After being clamped, the annular transverse rib separates from the bracket as the second moving platform moves forward.
[0052] like Figure 7 As shown in Embodiment 6, based on Embodiment 5, the lifting support assembly 50 includes a rectangular frame 52. A sidewall lifting mechanism is vertically slidable on one set of opposite sides of the rectangular frame 52, and a transverse lifting mechanism is vertically slidable on the other set of opposite sides, resulting in two sets of transverse lifting mechanisms and two sets of sidewall lifting mechanisms. In this embodiment, the lifting portion of the transverse lifting mechanism is on the longitudinal transverse rib, and the lifting portion of the sidewall lifting mechanism is at the end of the annular transverse rib. In this embodiment, the rectangular frame 52 includes four columns 60, which are arranged in a rectangular shape and connected to the base plate 61 at their bottom. The two longitudinal lifting mechanisms of each lifting support assembly extend or retract synchronously; the two transverse lifting mechanisms can extend or retract individually or synchronously according to actual lifting needs.
[0053] In this embodiment, the sidewall lifting mechanism includes a first pneumatic push rod 53 vertically fixed on the base plate 61. The telescopic part of the first pneumatic push rod 53 is connected to an L-shaped support plate 54. The two sides of the L-shaped support plate 54 are respectively slidably engaged with the slide rails vertically mounted on the column 60 via sliders. The first pneumatic push rod can drive the L-shaped support plate to move vertically. When lifting the tied section of the steel frame, the first pneumatic push rods of the longitudinal lifting mechanism on both sides extend, causing the top surface of the L-shaped support plate to press against the end of the annular transverse reinforcement in the tied area. The top surface of each L-shaped support plate can contact multiple annular transverse reinforcements to achieve a better lifting and support effect.
[0054] The lateral lifting mechanism includes a second pneumatic push rod 55 vertically fixed on the base plate 61. The telescopic part of the second pneumatic push rod 55 is connected to the arched support plate 56. The two sides of the arched support plate 56 are respectively slidably engaged with the slide rails vertically set on the column 60 via sliders. The second pneumatic push rod can drive the arched support plate to move vertically. The upper part of the arched support plate 56 is provided with a horizontal plate 59, on which several steel bar grooves 57 are opened. Several channel steel support blocks 58 are provided on both sides of the horizontal plate 59. When the longitudinal steel bars need to be lifted by the side wall lifting mechanism, the second pneumatic push rod extends, driving the arched support plate to move upward. The steel bar grooves on the horizontal plate of the arched support plate respectively engage with the side walls of several longitudinal steel bars, and continue to push the longitudinal steel bars upward to the appropriate binding height.
[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A movable work platform for binding top slab reinforcement of box girder, comprising two sets of parallel ground rail assemblies (1), characterized in that: It also includes several sets of lifting support components (50), which are located between two sets of ground rail components (1) and are arranged along the length of the ground rail components (1); a first moving platform (2) is movably provided across the lifting support components (50) on the two sets of ground rail components (1), and a second moving platform (3) is movably provided on the first moving platform (2); both sides of the front end of the first moving platform (2) are provided with a cantilever mechanism (4), and the rear end of the first moving platform (2) is provided with a bracket (26), which can support the untied annular transverse ribs; both sides of the front end of the second moving platform (3) are provided with a clamping mechanism (5); the second moving platform (3) The front end is provided with a lifting cantilever mechanism (6) and the lifting cantilever mechanism (6) is located in front of the clamping mechanism (5). The lifting cantilever mechanism (6) is provided with a limit switch (25). The limit switch (25) can identify the position of the tied annular horizontal bar and the untied annular bar during the movement of the second moving platform (3). The lifting cantilever mechanism (6) can lift the limit switch (25) after tying an annular horizontal bar and lower it when carrying the next untied annular horizontal bar to prevent collision with the previous tied annular horizontal bar during movement. Each set of ground rail assembly (1) includes at least one ground rail. The first moving platform (2) includes a first pallet (7). The pallet (7) is connected to two slides (8) at both ends. The second moving platform (3) is movably mounted on the two slides (8) at both ends, and there is a gap between the middle of the second moving platform (3) and the first pallet (7). The lifting mechanism (4) is located at the front end of the slide (8). The first moving wheel (9) is rotatably mounted below the slide (8) and is mounted on the ground rail. The first moving wheel (9) is connected to the first driver mounted on the slide (8). The lifting mechanism (4) includes a lifting arm (11) with its middle part hinged to the front end of the slide (8). One end of the lifting arm (11) is hinged to the telescopic end of the first hydraulic rod (12). The first hydraulic rod (12) is fixed. The first hydraulic rod (12) is fixed on the slide (8); under the extension and retraction of the first hydraulic rod (12), the other end of the boom (11) is lifted; the second moving platform (3) includes a second support plate (13), which is parallel to the first support plate (7). The two ends of the second support plate (13) are connected to two support platforms (51) respectively. The support platform (51) slides longitudinally with the slide rail on the slide (8) through a slider. The slide (8) is equipped with a linear motor (15) and the transmission direction of the linear motor (15) is consistent with the length direction of the slide rail. The support platform (51) is connected to the transmission end of the linear motor (15). The second support plate (13) is equipped with a guardrail (14).The clamping mechanism (5) includes at least one slide rod (16) that is laterally slidably disposed at the front end of the support platform (51). The end of the slide rod (16) is provided with a clamping block (18). The clamping blocks (18) on the two supports (51) are correspondingly arranged. The clamping blocks (18) are connected to a second hydraulic rod (17) disposed at the front end of the support platform (51). The extension and retraction direction of the second hydraulic rod (17) is the same as the sliding direction of the slide rod (16). An arc-shaped groove (19) is provided on the clamping block (18).
2. The movable work platform for tying top slab reinforcement of box girder according to claim 1, characterized in that: The lifting cantilever mechanism (6) includes a cantilever (20), the middle part of which is connected to the telescopic part of the third hydraulic rod (21) fixed on the second moving platform (3). One end of the cantilever (20) is connected to a slide bar (22) arranged parallel to the third hydraulic rod (21). The slide bar (22) is slidably inserted into a sleeve (23) fixed on the second moving platform (3). The other end of the cantilever (20) is provided with a forearm (24), and a limit switch (25) is provided on the forearm (24).
3. The movable work platform for tying top slab reinforcement of box girder according to claim 2, characterized in that: Two limit switches (25) are provided, and the two limit switches (25) are respectively located on both sides of the forearm (24); the bracket (26) is an L-shaped bracket, and at least two brackets (26) are provided. One end of the bracket (26) is fixedly connected to the first support plate (7), and the other end faces the front of the first support plate (7). Several shallow grooves are provided on the bracket (26) at equal intervals.
4. The movable work platform for tying top slab reinforcement of box girders according to any one of claims 1 to 3, characterized in that: The lifting support assembly (50) includes a rectangular frame (52). A sidewall lifting mechanism is vertically slidably provided on one set of opposite sides of the rectangular frame (52), and a lateral lifting mechanism is vertically slidably provided on the other set of opposite sides. The sidewall lifting mechanism includes a first pneumatic push rod (53) vertically fixed on the rectangular frame (52). The telescopic part of the first pneumatic push rod (53) is connected to an L-shaped support plate (54). The two sides of the L-shaped support plate (54) are respectively connected to the vertically fixed rectangular frame via sliders. The slide rail on the frame (52) is slidably engaged; the transverse lifting mechanism includes a second pneumatic push rod (55) vertically fixed on the rectangular frame (52), the telescopic part of the second pneumatic push rod (55) is connected to the arched support plate (56), and the two sides of the arched support plate (56) are respectively slidably engaged with the slide rail vertically mounted on the rectangular frame (52) through sliders; the upper part of the arched support plate (56) is provided with a horizontal plate part (59), and several channel steel support blocks (58) are provided on both sides of the horizontal plate part.
5. The movable work platform for tying top slab reinforcement of box girder according to claim 4, characterized in that: The horizontal plate (59) has several steel bar grooves (57), and the rectangular frame (52) includes four columns (60). The four columns (60) are arranged in a rectangle and their bottoms are connected to the base plate (61).
6. A method of using a movable workbench for tying top slab reinforcement of box girders as described in any one of claims 1 to 5, characterized in that: Includes the following steps: S1: Preparation: Place several ring-shaped horizontal bars to be tied on the support (26), and then place the longitudinal bars parallel between the two sets of ground rail components (1). Support the longitudinal bars by adjusting the support height of different lifting support components (50). Pass the front end of the longitudinal bars through all the ring-shaped horizontal bars to be tied, and make the end of the longitudinal bars flush with the front end of the first moving platform (2). Tie the first ring-shaped horizontal bar at the front end of the longitudinal bars manually. The lifting cantilever mechanism (6) descends to the initial height, and the construction personnel squat on the second moving platform (3). The second moving platform (3) moves to the tail of the first moving platform (2) and stops moving when the limit switch (25) is triggered. At this time, the clamping mechanism corresponds to the ring-shaped horizontal bar to be tied at the front end of the support (26). S2: Clamping and moving: The two clamping mechanisms (5) move synchronously to clamp the ring-shaped transverse bars to be tied from both sides. The lifting mechanism (4) lifts up the tied longitudinal steel bars and ring-shaped transverse bars to avoid the longitudinal steel bars pressing on the clamped ring-shaped transverse bars and affecting their movement. Then the second moving platform (3) carries the ring-shaped transverse bars clamped by the two clamping mechanisms (5) to the front end of the first moving platform (2). When the previous tied ring-shaped steel bar triggers the limit switch (25), the movement stops. S3: Manual binding: The pole mechanism (4) lowers the already bound longitudinal steel bars and ring horizontal bars and presses them onto the ring horizontal bars to be bound held by the clamping mechanism (5). The construction personnel squat down on the second moving platform (3) and manually bind the ring horizontal bars. After binding, the clamping mechanism (5) releases the clamping of the ring horizontal bars. S4: Reset action: The lifting arm mechanism (6) lifts the limit switch (25) and the second moving platform (3) moves to the tail of the first moving platform (2) again. After passing the tied ring cross rib, the lifting arm mechanism (6) lowers the limit switch (25) to the initial height. When the limit switch (25) moves with the second moving platform (3) and is triggered by the ring cross rib to be tied on the bracket (26), the second moving platform (3) stops moving. S5: Repeat steps S2~S4 above. When there are too many tied ring-shaped transverse bars, causing the second moving platform (3) to move too little, move the first moving platform (2) to the end of the longitudinal reinforcement. This will expand the area of the untied ring-shaped transverse bars on the longitudinal reinforcement corresponding to the first moving platform (2), so as to carry out the subsequent binding process. During the movement of the first moving platform (2), the lifting support components (50) in the moving direction are lowered one by one to avoid collision with the first moving platform (2). The lifting support components (50) that the first moving platform (2) moves past return to the state of supporting the longitudinal and transverse reinforcements. Repeat the above process until the binding of the entire top slab reinforcement is completed.