A building floor slab cantilever steel platform and its installation method

Abstract

The application discloses a building floor slab overhanging steel platform and a mounting method thereof, and relates to the field of building construction, which comprises a building floor slab overhanging steel platform and a walking plate, the building floor slab overhanging steel platform comprises a plurality of overhanging steel platforms and a steel wire tensioning mechanism, the overhanging steel platform comprises a U-shaped bolt, an I-beam, a fastening structure and a Y-shaped supporting mechanism; the fastening structure comprises left and right fastening mechanisms and a top locking mechanism, the steel wire tensioning mechanism comprises a tensioning part and a steel wire rope; the method comprises the following steps: (1) mounting the U-shaped bolt and the I-beam; (2) mounting and adjusting the left and right fastening mechanisms and the top locking mechanism and fastening the I-beam; (3) mounting the Y-shaped supporting mechanism; (4) mounting the walking plate connecting piece and the walking plate; (5) completing the mounting of the plurality of overhanging steel platforms and the walking plate; and (6) mounting the tensioning part and the steel wire rope. The application realizes the fastening of the left and right sides and the top of the web plate of the I-beam and the tensioning of the overhanging end, and improves the overall stability of the I-beam.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and in particular relates to a cantilevered steel platform for building floor slabs and its installation method. Background Technology

[0002] During the construction of high-rise buildings, there is an increasing demand for cantilevered steel platforms to be erected on the floor slabs, and the safety requirements for these platforms are also becoming more stringent.

[0003] During the construction of the cantilevered steel platform, when the cantilevered I-beams are installed, they are fixed to the platform of the building using U-bolts. There will be a large gap between the I-beams and the U-bolts, which construction workers usually fill with shims. Construction workers and equipment move around on the cantilevered steel platform, which can easily cause the I-beams to sway within the U-bolts, and in turn, cause the cantilevered steel platform to sway, affecting the normal construction work of the workers and resulting in low safety.

[0004] Therefore, there is currently a lack of a cantilevered steel platform for building floor slabs that can secure the left and right sides and top of the web of the I-beam by setting up left and right fastening mechanisms and a top locking mechanism, and tighten the cantilevered end of the I-beam by using a steel wire tensioning mechanism. This improves the overall stability of the I-beam, reduces the swaying of the cantilevered steel platform, and improves the safety of construction workers. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a cantilevered steel platform for building floor slabs. The platform is reasonably designed and uses left and right fastening mechanisms and a top locking mechanism to fasten the left and right sides and top of the web of the I-beam. The cantilevered end of the I-beam is tightened by a wire tensioning mechanism, which improves the overall stability of the I-beam, reduces the swaying of the cantilevered steel platform, and improves the safety of construction personnel.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a cantilever steel platform for building floor slabs, characterized in that: it includes multiple sets of cantilever steel platforms for building floor slabs arranged on the building floor slabs and multiple walking plates arranged between two adjacent sets of cantilever steel platforms for building floor slabs, each set of cantilever steel platforms for building floor slabs includes multiple cantilever steel platforms arranged along the height direction of the building floor slabs and a steel wire tensioning mechanism connecting the multiple cantilever steel platforms;

[0007] The cantilevered steel platform includes multiple U-bolts embedded in the building floor slab, an I-beam set on the building floor slab and located within the U-bolts, a fastening structure fitted onto the U-bolts and fastening the I-beam, and a Y-shaped support mechanism that supports the cantilevered end of the I-beam extending out of the building floor slab.

[0008] The fastening structure includes two left and right fastening mechanisms symmetrically fitted in the middle of the two straight sections of the U-bolt and clamping the web of the I-beam on both sides, and a top locking mechanism fitted at the top of the two straight sections of the U-bolt and locking the top of the I-beam.

[0009] The wire tensioning mechanism includes multiple tensioning components respectively installed at the cantilever ends of multiple I-beams and a wire rope threaded through the multiple tensioning components and arranged vertically.

[0010] The multiple traveling plates are all set between two adjacent I-beams at the same height via traveling plate connectors.

[0011] The above-mentioned cantilever steel platform for building floor slabs is characterized in that: the left and right fastening mechanism includes a mounting seat sleeved on the middle of the straight rod section of the U-bolt and capable of rotating around the straight rod section, two connecting bolts symmetrically arranged on the mounting seat and a clamping plate sleeved on the connecting bolts, and a telescopic guide component arranged between the mounting seat and the clamping plate, wherein the telescopic guide component drives the clamping plate to move closer to or away from the web of the I-beam.

[0012] The top locking mechanism includes a pressure plate sleeved on the top of the straight rod section of the U-bolt, an L-shaped bearing plate set at the bottom of the pressure plate, a pressure block structure set in the L-shaped bearing plate, and a top adjusting component that moves the pressure block structure closer to or away from the top plate of the I-beam.

[0013] The above-mentioned cantilever steel platform for building floor slabs is characterized in that: the telescopic guide component includes a spring disposed between the mounting base and the clamping plate, the clamping plate is provided with two symmetrically arranged connecting parts, the connecting parts are provided with waist-shaped adjustment holes, and the end of the connecting bolt passing through the waist-shaped adjustment hole is provided with front and rear locking nuts;

[0014] One end of the spring is connected to the mounting base, and the other end of the spring is connected to the clamping plate;

[0015] A flange plate is provided on the straight rod section. The flange plate and the mounting base are connected by a slewing bearing. The inner ring of the slewing bearing is connected to the flange plate, and the outer ring of the slewing bearing is connected to the bottom of the mounting base.

[0016] The above-mentioned cantilever steel platform for building floor slabs is characterized in that: the top adjustment component includes a central bearing disposed on the top of the pressure plate, a bidirectional screw rod rotatably mounted in the central bearing and arranged in a cross shape with the pressure plate, and two sets of extrusion components symmetrically disposed at both ends of the bidirectional screw rod and extruding the pressure block structure downward;

[0017] Both sets of extrusion components have the same structure and both include a connecting block threaded onto a bidirectional lead screw and a wedge block connected to the connecting block. The wedge block extrudes the pressing block structure downwards.

[0018] The above-mentioned cantilever steel platform for building floor slabs is characterized in that: the pressure block structure includes two symmetrically arranged first pressure blocks, a second pressure block, and a limiting member; the limiting member includes a first rack connected to the first pressure block, a first gear disposed in the second pressure block and meshing with the first rack, a second rack connected to the second pressure block, and a second gear disposed in the first pressure block and meshing with the second rack.

[0019] The bottom ends of the first and second pressing blocks, which are far apart from each other, are provided with vertically arranged baffles. The top ends of the first and second pressing blocks, which are far apart from each other, are provided with protruding edges. The top surface of the protruding edges is higher than the top surfaces of the first and second pressing blocks, so that the top surfaces of the first and second pressing blocks form extrusion grooves. The bottom of the pressing plate is provided with two symmetrically arranged L-shaped support plates. A lower spring is provided between the bottom of the protruding edges and the horizontal part of the L-shaped support plates.

[0020] The above-mentioned cantilevered steel platform for building floor slabs is characterized in that: the Y-shaped support mechanism includes a first fastener set at the cantilever end of the I-beam, a first support rod hinged to the bottom of the first fastener, a second fastener set in the middle of the I-beam, and a second support rod hinged to the bottom of the second fastener. The second support rod is installed in the middle of the first support rod by fasteners, and a lower mounting seat is provided at the bottom end of the first support rod.

[0021] The first fastener includes two parallel fastening plates that fit the top and bottom surfaces of the I-beam and multiple first bolts that connect the two fastening plates. The first bolts are located on both sides of the I-beam.

[0022] The second fastener includes a lower L-shaped corner plate that fits against the bottom surface of the I-beam, an upper fastening plate that is parallel to the horizontal part of the lower L-shaped corner plate and fits against the top surface of the I-beam, and multiple second bolts that connect the horizontal part of the lower L-shaped corner plate and the upper fastening plate. The second bolts are located on both sides of the I-beam. One end of the second support rod is hinged to the bottom surface of the horizontal part of the lower L-shaped corner plate. The first support rod and the second support rod are arranged in a Y-shape.

[0023] The vertical parts of the lower mounting base and the lower L-shaped corner plate are installed on the exterior wall of the building.

[0024] The above-mentioned cantilevered steel platform for building floor slabs is characterized in that: the walking plate connector includes a support plate disposed on the top surface of the cantilever end of the I-beam, multiple hanging holes are evenly provided on both sides of the support plate, the multiple hanging holes are arranged along the length direction of the support plate, multiple long bolts are evenly fixed to the bottom surface of both sides of the support plate, a base plate is installed at the bottom of the long bolts on both sides, the base plate is arranged in close contact with the bottom surface of the I-beam, and the long bolts are located on both sides of the I-beam;

[0025] The walking plate is provided with hooks at both ends, and the hooks are engaged with the hanging holes. The top surface of the walking plate is evenly provided with multiple anti-slip grooves, and the bottom surface of the walking plate is fixed with reinforcing ribs.

[0026] The bottom surface of the pallet is evenly provided with multiple grooves, and rubber pads are placed inside the grooves. The bottom surface of the rubber pads contacts the top surface of the I-beam.

[0027] The above-mentioned cantilever steel platform for building floor slabs is characterized in that: the tensioning component includes a No. 3 fastener set at the end of the cantilever end of the I-beam, a No. 1 clamping block set on the No. 3 fastener and capable of moving up and down, and a No. 2 clamping block that cooperates with the No. 1 clamping block to clamp the steel wire rope.

[0028] The No. 3 fastener includes a top seat that fits against the top surface of the I-beam, a lower fastening plate that is arranged parallel to the top seat and fits against the bottom surface of the I-beam, and multiple No. 3 bolts that connect the top seat and the lower fastening plate. The No. 3 bolts are located on both sides of the I-beam.

[0029] The top seat has an L-shaped seat at its bottom, and a vertical lead screw and two guide rods symmetrically arranged on both sides of the vertical lead screw are provided on the L-shaped seat. The two ends of the guide rods are installed on the top seat, and the top end of the vertical lead screw extending out of the top seat is provided with a screwing part. The two ends of the vertical lead screw are rotatably installed.

[0030] The first clamping block is provided with a connecting seat, which has a threaded hole for vertical lead screw thread connection and a guide hole for two guide rods to be installed.

[0031] The first clamping block and the second clamping block are provided with clamping grooves on their adjacent sides for clamping the wire rope. The first clamping block is provided with multiple connecting rods passing through the second clamping block, and the second clamping block is provided with locking nuts that cooperate with the connecting rods.

[0032] Meanwhile, this invention also discloses a simple and rationally designed method for installing a cantilevered steel platform for a building floor slab, characterized by the following steps:

[0033] Step 1: Installation of U-bolts and I-beams:

[0034] Step 101: Embed multiple U-bolts in the building floor slab; wherein, an anchor plate is fitted on the straight section of the multiple U-bolts, and the anchor plate is cast and embedded in the building floor slab;

[0035] Step 102: Install I-beams on the building floor slabs, with the I-beams positioned between two straight sections of multiple U-bolts;

[0036] Step 2: Installation and adjustment of the left and right fastening mechanisms and the top locking mechanism to secure the I-beam:

[0037] Step 201: Install left and right fastening mechanisms on the two straight sections of the U-bolt extending out of the building floor slab; wherein the left and right fastening mechanisms are located on the outside of the U-bolt;

[0038] Step 202: Rotate the mounting base around the straight section of the U-bolt so that the two left and right fastening mechanisms are located inside the U-bolt, and drive the clamping plate to move closer to the web of the I-beam through the telescopic guide component until the two clamping plates clamp the web of the I-beam.

[0039] Step 203: Adjust the first and second pressure blocks in the pressure block structure to move further apart from each other until the distance between the baffles in the first and second pressure blocks meets the width of the top plate of the I-beam.

[0040] And connect the lower spring in the first and second pressure blocks and the horizontal part of the L-shaped bearing plate;

[0041] Step 204: Install the top locking mechanism on the two straight sections of the U-bolt;

[0042] Step 205: Adjust the pressure block structure by adjusting the top adjustment component to move it closer to the top plate of the I-beam until the first and second pressure blocks are tightly attached to the top of the I-beam, thereby securing the top of the I-beam.

[0043] Step 3: Installation of the Y-shaped support mechanism:

[0044] Step 301: Install fastener No. 1 at the cantilever end of the I-beam extending out of the building floor slab, and install fastener No. 2 in the middle of the I-beam.

[0045] Step 302: Hinge the first support rod to the bottom of the first fastener, hinge the second support rod to the bottom of the second fastener, and install the second support rod in the middle of the first support rod using a fastener;

[0046] Step 303: Install the lower mounting base at the bottom of the first support rod, and install the lower mounting base and the vertical part of the L-shaped corner plate in the second fastener on the exterior wall of the building using expansion bolts;

[0047] Step 4: Installation of the travel plate connector and travel plate:

[0048] Step 401: Place rubber pads in the grooves on the bottom of the support plate and install the support plate at the cantilever end of the I-beam;

[0049] Step 402: Connect the multiple long bolts on both sides of the bottom surface of the pallet through the base plate; wherein, the base plate is arranged to fit the bottom surface of the I-beam, the long bolts are located on both sides of the I-beam, and the rubber pads are arranged to fit the top surface of the I-beam;

[0050] Step 403: Insert the hooks at both ends of the walking board into the hanging slots of two adjacent pallets at the same height;

[0051] Step 5: Repeat steps 1 to 4 multiple times along the height of the building to complete the installation of multiple cantilevered steel platforms and walking platforms;

[0052] Step Six: Installation of tensioning components and wire rope:

[0053] Step 601: Install fastener No. 3 at the cantilever end of the I-beam; wherein, fastener No. 3 is equipped with clamping block No. 1;

[0054] Step 602: Adjust the No. 1 clamping block by moving it up and down along the vertical screw on the No. 3 fastener until the clamping groove on the No. 1 clamping block corresponds to the bent part of the wire rope, and then embed the wire rope into the clamping groove.

[0055] Step 603: Install the second clamping block so that the clamping groove on the second clamping block and the protruding part of the wire rope are matched. After the multiple connecting rods on the first clamping block pass through the second clamping block, install the locking nut on the protruding end of the connecting rod.

[0056] The above installation method is characterized by the following steps: Step 202, the specific process of which is as follows:

[0057] Step 2021: Rotate the mounting base around the straight section of the U-bolt via the slewing bearing so that the two left and right fastening mechanisms are located inside the U-bolt;

[0058] Step 2022: Loosen the front and rear locking nuts to release the locking of the connection. The spring extends and pushes the clamping plate to move. At the same time, the waist-shaped adjustment hole of the connection moves along the connecting bolt. The clamping plate moves closer to the web of the I-beam until the clamping plate clamps the web of the I-beam.

[0059] Step 2023: Tighten the front and rear lock nuts to lock the connection.

[0060] Step 203, the specific process is as follows:

[0061] The first rack in the first pressure block moves around the first gear, while the second rack moves around the second gear, so that the first pressure block and the second pressure block move away from each other until the distance between the baffle in the first pressure block and the baffle in the second pressure block meets the width of the top plate of the I-beam.

[0062] Step 205, the specific process is as follows:

[0063] The screw head drives the bidirectional lead screw to rotate. The rotation of the bidirectional lead screw drives the two wedge blocks to move closer through the two connecting blocks. The wedge blocks move closer to the extrusion grooves on the top surfaces of the first and second pressure blocks, thereby squeezing the first and second pressure blocks to move downwards until the tops of the first and second pressure blocks are in close contact with the top of the I-beam, thus achieving the fastening of the top of the I-beam.

[0064] Compared with the prior art, the present invention has the following advantages:

[0065] 1. The present invention has a simple structure, reasonable design, and is easy to install and deploy.

[0066] 2. The fastening structure of this invention includes two left and right fastening mechanisms and a top locking mechanism. The left and right fastening mechanisms are sleeved in the middle of the two straight rod sections of the U-bolt and clamp the web of the I-beam on both sides. The top locking mechanism is sleeved at the top of the two straight rod sections of the U-bolt and locks the top of the I-beam. This fastening mechanism achieves fastening of the left and right sides and the top of the web of the I-beam, avoiding the probability of horizontal and vertical swaying of the I-beam, thereby improving the overall stability of the I-beam and reducing the swaying of the cantilevered steel platform.

[0067] 3. The present invention provides a Y-shaped support mechanism to support the cantilever end of the I-beam extending out of the building floor slab, so as to stabilize the force on the cantilever end of the I-beam extending out of the building floor slab and prevent the cantilever end of the I-beam extending out of the building floor slab from deforming and shifting under force, thereby causing the I-beam to sway in the U-bolt.

[0068] 4. The present invention provides a wire tensioning mechanism comprising tensioning components and vertically arranged wire ropes threaded through multiple tensioning components. The tensioning components are installed at the cantilevered end of the I-beam. Under the action of the wire ropes, the tensioning components achieve tension at the cantilevered end of the I-beam, enabling I-beams at different heights to bear the load. This further reduces the stress deformation and displacement of the cantilevered end of the I-beam extending beyond the building floor slab, improves the overall stability of the I-beam, reduces swaying of the cantilevered steel platform, and enhances the safety of construction personnel.

[0069] 5. The installation method of the cantilevered steel platform for building floor slabs of the present invention is simple, convenient and easy to operate, so as to make the cantilevered steel platform for building floor slabs stable.

[0070] 6. The installation method of the cantilevered steel platform for building floor slabs of the present invention is simple to operate. First, the U-bolts and I-beams are installed. Then, the left and right fastening mechanisms and the top locking mechanism are installed and the I-beams are adjusted and fastened. Next, the Y-shaped support mechanism is installed. Then, the walking plate connector and the walking plate are installed. Multiple cantilevered steel platforms and walking plates are installed along the height direction of the building floor slabs. Finally, the tensioning components and wire ropes are installed. The overall stability is good.

[0071] In summary, the present invention is reasonably designed. By setting up left and right fastening mechanisms and a top locking mechanism, the left and right sides and the top of the web of the I-beam are fastened. The cantilever end of the I-beam is tightened by the wire tensioning mechanism, which improves the overall stability of the I-beam, reduces the swaying of the cantilevered steel platform, and improves the safety of construction personnel.

[0072] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0073] Figure 1 This is a schematic diagram of the cantilevered steel platform for the building floor slab of the present invention.

[0074] Figure 2 This is a schematic diagram of the structure for fastening the cantilevered steel platform of the building floor slab according to the present invention.

[0075] Figure 3 This is a structural schematic diagram of the telescopic guide component for the cantilevered steel platform of the building floor slab according to the present invention.

[0076] Figure 4 This is a schematic diagram of the structure of the cantilevered steel platform clamping plate of the building floor slab according to the present invention.

[0077] Figure 5 This is a schematic diagram of the cantilevered steel platform pressure block structure for the building floor slab of the present invention.

[0078] Figure 6 for Figure 5 Top view.

[0079] Figure 7 This is a structural schematic diagram of the cantilevered steel platform walking plate connector and Y-shaped support mechanism for building floor slabs according to the present invention.

[0080] Figure 8 This is a schematic diagram of the structure of the cantilevered steel platform support plate for the building floor slab of the present invention.

[0081] Figure 9 This is a schematic diagram of the structure of the tensioning component for the cantilevered steel platform of the building floor slab according to the present invention.

[0082] Figure 10 This is a flowchart illustrating the installation method of the cantilevered steel platform for building floor slabs according to the present invention.

[0083] Explanation of reference numerals in the attached figures:

[0084] 1—U-bolt; 1-1—Straight rod section; 1-2—Flange plate;

[0085] 2—I-beam; 3—Pressure plate; 4—L-shaped load-bearing plate;

[0086] 5—Pressure block structure; 5-1—First pressure block; 5-1-1—First toothed rack;

[0087] 5-1-2—First gear; 5-2—Second pressure block; 5-2-1—Second rack;

[0088] 5-2-2—Second gear; 5-3—Flange; 5-4—Baffle;

[0089] 5-5—Lower spring; 5-6—Extrusion groove; 6—Building floor slab;

[0090] 7—Double-acting lead screw; 7-1—Center bearing;

[0091] 7-2—Screwing head; 7-3—Limit plate;

[0092] 8—Wedge block; 9—Connecting block; 10—Cantilevered steel platform;

[0093] 11—Mounting base; 11-1—Connecting bolt; 11-2—Slewing bearing;

[0094] 11-3—Front and rear locking nuts; 12—Anchor plate; 13—Clamping plate;

[0095] 13-1—Connecting part; 13-2—Oval adjusting hole; 14—Spring;

[0096] 15—Lower mounting base; 16—First fastener; 16-1—Fastening plate;

[0097] 16-2—No. 1 Bolt; 17—No. 1 Support Rod; 18—No. 2 Fastener;

[0098] 18-1—Lower L-shaped corner plate; 18-2—Upper fastening plate; 19—Second support rod;

[0099] 20—Fastener; 21—Panel; 21-1—Groove;

[0100] 22—Hanging opening; 23—Long bolt; 24—Base plate;

[0101] 25—Walking board; 25-1—Anti-slip groove; 25-2—Hook;

[0102] 26—Rubber pad; 27—No. 3 fastener; 27-1—Lower fastener plate;

[0103] 27-2—No. 3 bolt; 28—Top seat; 28-1—L-shaped seat;

[0104] 29—Clamping block No. 1; 29-1—Connecting seat; 29-2—Connecting rod;

[0105] 30—Second clamping block; 30-1—Locking nut;

[0106] 31—Wire rope; 32—Clamping groove; 33—Vertical lead screw;

[0107] 34—Guide rod; 36—Tightening component. Detailed Implementation

[0108] like Figures 1 to 9 The building floor slab cantilever steel platform shown includes multiple sets of building floor slab cantilever steel platforms set on building floor slabs 6 and multiple walking plates 25 set between two adjacent sets of building floor slab cantilever steel platforms. Each set of building floor slab cantilever steel platforms includes multiple cantilever steel platforms 10 arranged along the height direction of building floor slabs 6 and a steel wire tensioning mechanism connecting multiple cantilever steel platforms 10.

[0109] The cantilevered steel platform 10 includes multiple U-bolts 1 embedded in the building floor slab 6, an I-beam 2 set on the building floor slab 6 and located in the U-bolts 1, a fastening structure sleeved on the U-bolts 1 and fastened to the I-beam 2, and a Y-shaped support mechanism for supporting the cantilever end of the I-beam 2 extending out of the building floor slab 6.

[0110] The fastening structure includes two left and right fastening mechanisms symmetrically sleeved in the middle of the two straight rod sections 1-1 of the U-bolt 1 and clamping the web of the I-beam 2 on both sides, and a top locking mechanism sleeved at the top of the two straight rod sections 1-1 of the U-bolt 1 and locking the top of the I-beam 2.

[0111] The wire tensioning mechanism includes multiple tensioning components 36 respectively installed at the cantilever ends of multiple I-beams 2 and wire ropes 31 that are threaded through the multiple tensioning components 36 and arranged vertically.

[0112] The multiple walking plates 25 are all set between two adjacent I-beams 2 at the same height via walking plate connectors.

[0113] In this embodiment, the left and right fastening mechanism includes a mounting base 11 that is sleeved on the middle of the straight rod section 1-1 of the U-bolt 1 and can rotate around the straight rod section 1-1, two connecting bolts 11-1 symmetrically arranged on the mounting base 11, and a clamping plate 13 sleeved on the connecting bolts 11-1, as well as a telescopic guide component arranged between the mounting base 11 and the clamping plate 13. The telescopic guide component drives the clamping plate 13 to move closer to or away from the web of the I-beam 2.

[0114] The top locking mechanism includes a pressure plate 3 sleeved on the top of the straight rod section 1-1 of the U-bolt 1, an L-shaped bearing plate 4 set at the bottom of the pressure plate 3, a pressure block structure 5 set in the L-shaped bearing plate 4, and a top adjusting component that moves the pressure block structure 5 closer to or further away from the top plate of the I-beam 2.

[0115] In this embodiment, the telescopic guide component includes a spring 14 disposed between the mounting base 11 and the clamping plate 13. The clamping plate 13 is provided with two symmetrically arranged connecting parts 13-1. The connecting parts 13-1 are provided with waist-shaped adjustment holes 13-2. The end of the connecting bolt 11-1 that passes through the waist-shaped adjustment holes 13-2 is provided with front and rear locking nuts 11-3.

[0116] One end of the spring 14 is connected to the mounting base 11, and the other end of the spring 14 is connected to the clamping plate 13;

[0117] A flange plate 1-2 is provided on the straight rod section 1-1. The flange plate 1-2 and the mounting base 11 are connected by a slewing bearing 11-2. The inner ring of the slewing bearing 11-2 is connected to the flange plate 1-2, and the outer ring of the slewing bearing 11-2 is connected to the bottom of the mounting base 11.

[0118] In this embodiment, the top adjustment component includes a central bearing 7-1 disposed on the top of the pressure plate 3, a bidirectional lead screw 7 rotatably mounted in the central bearing 7-1 and arranged in a cross shape with the pressure plate 3, and two sets of extrusion components symmetrically disposed at both ends of the bidirectional lead screw 7 and extrusion block structure 5 moving downward.

[0119] Both sets of extrusion components have the same structure and both include a connecting block 9 threaded onto a bidirectional lead screw 7 and a wedge block 8 connected to the connecting block 9. The wedge block 8 extrudes the pressing block structure 5 and moves it downward.

[0120] In this embodiment, the pressure block structure 5 includes two symmetrically arranged first pressure blocks 5-1, second pressure blocks 5-2, and a limiting member. The limiting member includes a first rack 5-1-1 connected to the first pressure block 5-1, a first gear 5-1-2 disposed in the second pressure block 5-2 and meshing with the first rack 5-1-1, a second rack 5-2-1 connected to the second pressure block 5-2, and a second gear 5-2-2 disposed in the first pressure block 5-1 and meshing with the second rack 5-2-1.

[0121] The bottom ends of the first pressing block 5-1 and the second pressing block 5-2, which are far apart from each other, are provided with vertically arranged baffles 5-4. The top ends of the first pressing block 5-1 and the second pressing block 5-2, which are far apart from each other, are provided with protruding edges 5-3. The top surface of the protruding edge 5-3 is higher than the top surface of the first pressing block 5-1 and the second pressing block 5-2, so that the top surface of the first pressing block 5-1 and the second pressing block 5-2 forms a pressing groove 5-6. The bottom of the pressing plate 3 is provided with two symmetrically arranged L-shaped support plates 4. A lower spring 5-5 is provided between the bottom of the protruding edge 5-3 and the horizontal part of the L-shaped support plate 4.

[0122] In this embodiment, the Y-shaped support mechanism includes a first fastener 16 disposed at the cantilever end of the I-beam 2, a first support rod 17 hinged to the bottom of the first fastener 16, a second fastener 18 disposed in the middle of the I-beam 2, and a second support rod 19 hinged to the bottom of the second fastener 18. The second support rod 19 is installed in the middle of the first support rod 17 by a fastener 20, and a lower mounting base 15 is provided at the bottom end of the first support rod 17.

[0123] The first fastener 16 includes two parallel fastening plates 16-1 that fit the top and bottom surfaces of the I-beam 2 and multiple first bolts 16-2 that connect the upper and lower fastening plates 16-1. The first bolts 16-2 are located on both sides of the I-beam 2.

[0124] The second fastener 18 includes a lower L-shaped corner plate 18-1 that fits against the bottom surface of the I-beam 2, an upper fastening plate 18-2 that is arranged parallel to the horizontal part of the lower L-shaped corner plate 18-1 and fits against the top surface of the I-beam 2, and a plurality of second bolts connecting the horizontal part of the lower L-shaped corner plate 18-1 and the upper fastening plate 18-2. The second bolts are located on both sides of the I-beam 2. One end of the second support rod 19 is hinged to the bottom surface of the horizontal part of the lower L-shaped corner plate 18-1. The first support rod 17 and the second support rod 19 are arranged in a Y-shape.

[0125] The vertical parts of the lower mounting base 15 and the lower L-shaped corner plate 18-1 are installed on the exterior wall of the building.

[0126] In this embodiment, the walking plate connector includes a support plate 21 disposed on the top surface of the cantilever end of the I-beam 2. Multiple hanging holes 22 are evenly provided on both sides of the support plate 21. The multiple hanging holes 22 are arranged along the length direction of the support plate 21. Multiple long bolts 23 are evenly fixed to the bottom surface of both sides of the support plate 21. A base plate 24 is installed at the bottom of the long bolts 23 on both sides. The base plate 24 is arranged in close contact with the bottom surface of the I-beam 2. The long bolts 23 are located on both sides of the I-beam 2.

[0127] The walking plate 25 is provided with hooks 25-2 at both ends, and the hooks 25-2 are engaged with the hanging opening 22. The top surface of the walking plate 25 is evenly provided with multiple anti-slip grooves 25-1, and the bottom surface of the walking plate 25 is fixed with reinforcing ribs.

[0128] The bottom surface of the pallet 21 is evenly provided with a plurality of grooves 21-1, and a rubber pad 26 is provided inside the groove 21-1. The bottom surface of the rubber pad 26 is in contact with the top surface of the I-beam 2.

[0129] In this embodiment, the tensioning component 36 includes a No. 3 fastener 27 disposed at the end of the cantilever end of the I-beam 2, a No. 1 clamping block 29 disposed on the No. 3 fastener 27 and capable of moving up and down, and a No. 2 clamping block 30 that cooperates with the No. 1 clamping block 29 to clamp the wire rope 31.

[0130] The third fastener 27 includes a top seat 28 that fits the top surface of the I-beam 2, a lower fastening plate 27-1 that is arranged parallel to the top seat 28 and fits the bottom surface of the I-beam 2, and a plurality of third bolts 27-2 that connect the top seat 28 and the lower fastening plate 27-1. The third bolts 27-2 are located on both sides of the I-beam 2.

[0131] The bottom of the top seat 28 is provided with an L-shaped seat 28-1. The L-shaped seat 28-1 is provided with a vertical lead screw 33 and two guide rods 34 symmetrically arranged on both sides of the vertical lead screw 33. The two ends of the guide rods 34 are installed on the top seat 28. The top end of the vertical lead screw 33 extending out of the top seat 28 is provided with a screwing part. The two ends of the vertical lead screw 33 are rotatably installed.

[0132] The first clamping block 29 is provided with a connecting seat 29-1, which has a threaded hole for threaded connection of the vertical lead screw 33 and a guide hole for installation of the two guide rods 34.

[0133] The first clamping block 29 and the second clamping block 30 are provided with clamping grooves 32 for clamping the wire rope 31 on their adjacent sides. The first clamping block 29 is provided with multiple connecting rods 29-2 passing through the second clamping block 30. The second clamping block 30 is provided with locking nuts 30-1 that cooperate with the connecting rods 29-2.

[0134] In this embodiment, one end of the spring 14 extends into a blind hole on the end face of the mounting base 11, and the other end of the spring 14 extends into a blind hole on the back side of the clamping plate 13.

[0135] In this embodiment, the slewing bearing 11-2 is provided so that after the left and right fastening mechanisms are installed on the two straight rod sections 1-1 of the U-bolt 1 extending out of the building floor slab 6, the left and right fastening mechanisms are located outside the U-bolt 1, which is convenient to adapt to the I-beam 2 and reduce the difficulty of installation. In addition, it is to allow the rotating mounting base 11 to rotate around the axis of the straight rod section 1-1 of the U-bolt 1 through the slewing bearing 11-2, so that the two left and right fastening mechanisms are located inside the U-bolt 1, which is convenient for the two clamping plates 13 to clamp the web of the I-beam 2, making the operation convenient.

[0136] In this embodiment, the spring 14 extends to push the clamping plate 13 to move, and at the same time, the waist-shaped adjustment hole 13-2 of the connecting part 13-1 moves along the connecting bolt 11-1 to further assist in limiting the movement, ensuring that the clamping plate 13 moves closer to the web of the I-beam 2 until the clamping plate 13 clamps the web of the I-beam 2.

[0137] Additionally, the spring 14 extends to push the clamping plate 13 to move through the waist-shaped adjustment hole 13-2. This serves two purposes: firstly, to allow the spring 14 to contract and extend, providing clamping force and achieving stable clamping; and secondly, to adapt to I-beams 2 with different web thicknesses, thus improving adaptability. Furthermore, the left and right springs 14 can accommodate slight left and right offsets of the I-beam 2, ensuring that other components are not damaged while still meeting stability requirements.

[0138] In this embodiment, the rack and gear are provided to allow the first rack 5-1-1 in the first pressure block 5-1 to move around the first gear 5-1-2, while simultaneously allowing the second rack 5-2-1 to move around the second gear 5-2-2. This causes the first pressure block 5-1 and the second pressure block 5-2 to move away from each other until the gap between the baffle 5-4 in the first pressure block 5-1 and the baffle 5-4 in the second pressure block 5-2 meets the width of the top plate of the I-beam 2, thus adapting to I-beams 2 with different top plate widths. In addition, the rack and gear, when moving in coordination, can also limit the gap between the first pressure block 5-1 and the second pressure block 5-2, preventing slippage and facilitating subsequent connection and uniform pressure application.

[0139] In this embodiment, the lower spring 5-5 is provided so that after the lower spring 5-5 and the horizontal part of the L-shaped bearing plate 4 are connected, and after the top locking mechanism unloads the compressive force, the lower spring 5-5 extends to push the first pressure block 5-1 and the second pressure block 5-2 to move upward and reset as a whole, detaching from the top of the I-beam 2, so as to facilitate unloading along with the top locking mechanism; in addition, the lower spring 5-5 can adapt to the slight displacement of the top of the I-beam 2 so as not to damage the top locking mechanism and still meet the stability requirements.

[0140] In this embodiment, during actual use, the end of the bidirectional lead screw 7 extending out of the connecting block 9 and the wedge block 8 is provided with a limiting plate 7-3 and a screwing head 7-2.

[0141] In this embodiment, during actual use, the bidirectional lead screw 7 has two threaded sections at both ends of the central bearing 7-1, and the two threaded sections have opposite directions of rotation, so that the bidirectional lead screw 7 is rotated by the screwing head 7-2. The rotation of the bidirectional lead screw 7 drives the two wedge blocks 8 to move closer through the two connecting blocks 9. The wedge blocks 8 move closer to the extrusion grooves 5-6 on the top surface of the first pressure block 5-1 and the second pressure block 5-2, thereby extruding the first pressure block 5-1 and the second pressure block 5-2 to move downward.

[0142] Conversely, by rotating the screw rod 7 in the opposite direction through the screw head 7-2, the wedge blocks 8 move away from each other and are pulled out from the extrusion groove 5-6, releasing the extrusion on the first pressure block 5-1 and the second pressure block 5-2. Then, the first pressure block 5-1 and the second pressure block 5-2 are reset under the action of the lower spring 5-5.

[0143] In this embodiment, during actual use, the first pressure block 5-1 has a first mounting groove inside the side of the first pressure block 5-1 near the second pressure block 5-2, into which one end of the first rack 5-1-1 is inserted for installation. The second pressure block 5-2 has a first receiving groove inside the side of the second pressure block 5-1 near the first pressure block 5-1, into which the first rack 5-1-1 is inserted for accommodation. The first gear 5-1-2 is rotatably installed in the first receiving groove so that the first rack 5-1-1 and the first gear 5-1-2 are meshed and connected.

[0144] The second pressure block 5-2 has a second mounting groove inside its side near the first pressure block 5-1, into which one end of the second rack 5-2-1 is inserted for installation. The first pressure block 5-1 has a second receiving groove inside its side near the second pressure block 5-2, into which the second rack 5-2-1 is inserted for accommodation. The second gear 5-2-2 is rotatably installed in the second receiving groove so that the second rack 5-2-1 meshes with the second gear 5-2-2.

[0145] In this embodiment, the bottom end of the vertical lead screw 33 is rotatably mounted in the horizontal part of the L-shaped seat 28-1 via a lower bearing, and the top end of the vertical lead screw 33 is rotatably mounted on the top seat 28 via an upper bearing; the top of the vertical part of the L-shaped seat 28-1 is connected to the bottom of the top seat 28.

[0146] In this embodiment, in actual use, the bottom of the lower spring 5-5 is provided with a flat plate, which facilitates the connection of the horizontal part of the L-shaped support plate 4 and facilitates the connection of bolts through the bottom of the horizontal part of the L-shaped support plate 4.

[0147] In this embodiment, during actual use, the clamping groove 32 is corrugated and curved, and the top of the clamping groove 32 is vertical to facilitate the passage of the straight part of the wire rope 31; the inner wall of the clamping groove 32 is provided with anti-slip protrusions or a rubber layer to increase the friction with the wire rope 31 and improve the clamping stability of the wire rope 31.

[0148] In addition, by adjusting the vertical screw 33 on the third fastener 27 to move the first clamp 29 up and down along the vertical screw 33, the tension of the wire rope can be adjusted, which can better adjust the tension of the wire rope between the two I-beams and improve the overall stability of the cantilever steel platform.

[0149] like Figure 10 The method for installing a cantilevered steel platform for a building floor slab, as shown, includes the following steps:

[0150] Step 1: Installation of U-bolts and I-beams:

[0151] Step 101: Embed multiple U-bolts 1 in the building floor slab 6; wherein, an anchor plate 12 is sleeved on the straight rod section 1-1 of the multiple U-bolts 1, and the anchor plate 12 is cast and embedded in the building floor slab 6.

[0152] Step 102: Install the I-beam 2 on the floor slab 6 of the building, with the I-beam 2 located between two straight sections 1-1 of the multiple U-bolts 1;

[0153] Step 2: Installation and adjustment of the left and right fastening mechanisms and the top locking mechanism to secure the I-beam:

[0154] Step 201: Install left and right fastening mechanisms on the two straight sections 1-1 of the U-bolt 1 extending out of the building floor slab 6; wherein the left and right fastening mechanisms are located on the outside of the U-bolt 1;

[0155] Step 202: Rotate the mounting base 11 around the straight rod section 1-1 of the U-bolt 1 so that the two left and right fastening mechanisms are located inside the U-bolt 1, and drive the clamping plate 13 to move closer to the web of the I-beam 2 through the telescopic guide component until the two clamping plates 13 clamp the web of the I-beam 2.

[0156] Step 203: Adjust the first pressure block 5-1 and the second pressure block 5-2 in the pressure block structure 5 to move away from each other until the distance between the baffle 5-4 in the first pressure block 5-1 and the baffle 5-4 in the second pressure block 5-2 meets the width of the top plate of the I-beam 2.

[0157] And connect the lower spring 5-5 in the first pressure block 5-1 and the second pressure block 5-2 with the horizontal part of the L-shaped bearing plate 4;

[0158] Step 204: Install the top locking mechanism on the two straight rod sections 1-1 of the U-bolt 1;

[0159] Step 205: Adjust the pressure block structure 5 to move closer to the top plate of the I-beam 2 using the top adjustment component until the first pressure block 5-1 and the second pressure block 5-2 are tightly attached to the top of the I-beam 2, thereby securing the top of the I-beam 2.

[0160] Step 3: Installation of the Y-shaped support mechanism:

[0161] Step 301: Install fastener 16 at the cantilever end of the I-beam 2 extending out of the building floor slab 6, and install fastener 18 at the middle of the I-beam 2.

[0162] Step 302: Hinge the first support rod 17 to the bottom of the first fastener 16, hinge the second support rod 19 to the bottom of the second fastener 18, and install the second support rod 19 in the middle of the first support rod 17 through the fastener 20.

[0163] Step 303: Install the lower mounting base 15 at the bottom end of the first support rod 17, and install the lower mounting base 15 and the vertical part of the L-shaped corner plate 18-1 in the second fastener 18 on the exterior wall of the building using expansion bolts;

[0164] Step 4: Installation of the travel plate connector and travel plate:

[0165] Step 401: Set a rubber pad 26 in the groove 21-1 on the bottom surface of the support plate 21, and install the support plate 21 at the cantilever end of the I-beam 2;

[0166] Step 402: Connect the multiple long bolts 23 on both sides of the bottom surface of the support plate 21 through the base plate 24; wherein, the base plate 24 is arranged to fit the bottom surface of the I-beam 2, the long bolts 23 are located on both sides of the I-beam 2, and the rubber pads 26 are arranged to fit the top surface of the I-beam 2.

[0167] Step 403: Insert the hooks 25-2 at both ends of the walking plate 25 into the hanging slots 22 of two adjacent pallets 21 at the same height;

[0168] Step 5: Repeat steps 1 to 4 multiple times along the height of the building to complete the installation of multiple cantilevered steel platforms 10 and walking platforms 25;

[0169] Step Six: Installation of tensioning components and wire rope:

[0170] Step 601: Install fastener No. 3 27 at the end of the cantilever end of the I-beam 2; wherein, fastener No. 3 27 is provided with clamping block No. 1 29;

[0171] Step 602: Adjust the first clamping block 29 to move up and down along the vertical screw 33 on the third fastener 27 until the clamping groove 32 on the first clamping block 29 corresponds to the bent part of the wire rope 31, and then embed the wire rope 31 into the clamping groove 32.

[0172] Step 603: Install the second clamping block 30 so that the clamping groove 32 on the second clamping block 30 and the protruding part of the wire rope 31 cooperate. After the multiple connecting rods 29-2 on the first clamping block 29 pass through the second clamping block 30, install the locking nut 30-1 at the protruding end of the connecting rod 29-2.

[0173] In this embodiment, step 202 is specifically performed as follows:

[0174] Step 2021: Rotate the mounting base 11 around the straight rod section 1-1 of the U-bolt 1 via the slewing bearing 11-2 so that the two left and right fastening mechanisms are located inside the U-bolt 1;

[0175] Step 2022: Loosen the front and rear locking nuts 11-3 to release the locking of the connecting part 13-1. The spring 14 extends and pushes the clamping plate 13 to move. At the same time, the waist-shaped adjustment hole 13-2 of the connecting part 13-1 moves along the connecting bolt 11-1. The clamping plate 13 moves closer to the web of the I-beam 2 until the clamping plate 13 clamps the web of the I-beam 2.

[0176] Step 2023: Tighten the front and rear locking nuts 11-3 to lock the connecting part 13-1;

[0177] Step 203, the specific process is as follows:

[0178] The first rack 5-1-1 in the first pressure block 5-1 moves around the first gear 5-1-2, while the second rack 5-2-1 moves around the second gear 5-2-2, so that the first pressure block 5-1 and the second pressure block 5-2 move away from each other until the distance between the baffle 5-4 in the first pressure block 5-1 and the baffle 5-4 in the second pressure block 5-2 meets the width of the top plate of the I-beam 2.

[0179] Step 205, the specific process is as follows:

[0180] The screw head 7-2 drives the bidirectional lead screw 7 to rotate. The rotation of the bidirectional lead screw 7 drives the two wedge blocks 8 to move closer through the two connecting blocks 9. The wedge blocks 8 move closer to the extrusion grooves 5-6 on the top surfaces of the first pressure block 5-1 and the second pressure block 5-2, thereby squeezing the first pressure block 5-1 and the second pressure block 5-2 to move downward until the top of the first pressure block 5-1 and the second pressure block 5-2 are in close contact with the top of the I-beam 2, thus achieving the fastening of the top of the I-beam 2.

[0181] In this embodiment, in actual use, a U-shaped embedded part can also be set at the top of the floor slab, and the top of the steel wire rope 31 passes through the U-shaped embedded part and is fixed by the steel wire rope buckle.

[0182] In summary, the present invention is reasonably designed. By setting up left and right fastening mechanisms and a top locking mechanism, the left and right sides and the top of the web of the I-beam are fastened. The cantilever end of the I-beam is tightened by the wire tensioning mechanism, which improves the overall stability of the I-beam, reduces the swaying of the cantilevered steel platform, and improves the safety of construction personnel.

[0183] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Any simple modifications, alterations, or equivalent structural changes made to the above embodiments based on the technical essence of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A building floor slab cantilevered steel platform characterized by: The application relates to a building floor slab cantilevered steel platform and a walking plate. The cantilevered steel platform comprises a plurality of U-shaped bolts (1) embedded in a building floor slab (6), an I-beam (2) arranged on the building floor slab (6) and located in the U-shaped bolts (1), a fastening structure sleeved on the U-shaped bolts (1) and fastening the I-beam (2), and a Y-shaped supporting mechanism supporting a cantilevered end of the I-beam (2) extending out of the building floor slab (6). The fastening structure comprises left and right fastening mechanisms symmetrically sleeved on the middle portions of two straight rod sections (1-1) of the U-shaped bolts (1) and clamping both sides of the web of the I-beam (2), and a top locking mechanism sleeved on the top ends of the two straight rod sections (1-1) of the U-shaped bolts (1) and locking the top of the I-beam (2). The steel wire tensioning mechanism comprises a plurality of tensioning components (36) arranged at the cantilevered ends of the I-beams (2) respectively and a steel wire rope (31) vertically arranged and penetrating through the tensioning components (36). The walking plate connecting piece comprises a supporting plate (21) arranged at the cantilevered end top surface of the I-beam (2), a plurality of hanging openings (22) uniformly arranged on the two sides of the supporting plate (21) along the length direction of the supporting plate (21), a plurality of long bolts (23) uniformly fixed on the bottom surfaces of the two sides of the supporting plate (21), a bottom plate (24) arranged at the bottom of the long bolts (23) on the two sides, and the bottom plate (24) being arranged in close contact with the bottom surface of the I-beam (2). The walking plate (25) is provided with hooks (25-2) at the two ends, the hooks (25-2) are inserted into the hanging openings (22) in cooperation, a plurality of anti-skid grooves (25-1) are uniformly arranged on the top surface of the walking plate (25), and a reinforcing rib is fixed on the bottom surface of the walking plate (25). The bottom surface of the supporting plate (21) is uniformly provided with a plurality of grooves (21-1), and rubber pads (26) are arranged in the grooves (21-1). ​ 2. A building floor slab cantilevered steel platform according to claim 1, characterised in that: The left and right fastening mechanisms comprise a mounting seat (11) sleeved in the middle of the straight rod section (1-1) of the U-shaped bolt (1) and capable of rotating around the straight rod section (1-1), two connecting bolts (11-1) symmetrically arranged on the mounting seat (11), a clamping plate (13) sleeved on the connecting bolts (11-1), and a telescopic guide component arranged between the mounting seat (11) and the clamping plate (13), which drives the clamping plate (13) to move close to or away from the web of the I-beam (2); The top locking mechanism comprises a pressing plate (3) sleeved on the top of the straight rod section (1-1) of the U-shaped bolt (1), an L-shaped bearing plate (4) arranged at the bottom of the pressing plate (3), a pressing block structure (5) arranged in the L-shaped bearing plate (4), and a top adjusting component driving the pressing block structure (5) to move close to or away from the top plate of the I-beam (2).

3. A building floor slab cantilevered steel platform according to claim 2, characterised in that: The telescopic guide component comprises a spring (14) arranged between the mounting seat (11) and the clamping plate (13), the clamping plate (13) is provided with two symmetrically arranged connecting portions (13-1), the connecting portions (13-1) are provided with a waist-shaped adjusting hole (13-2), and the end of the connecting bolt (11-1) penetrating through the waist-shaped adjusting hole (13-2) is provided with a front and rear locking nut (11-3); One end of the spring (14) is connected with the mounting seat (11), and the other end of the spring (14) is connected with the clamping plate (13); The straight rod section (1-1) is provided with a flange plate (1-2), the flange plate (1-2) and the mounting seat (11) are connected through a rotary support (11-2), the inner ring of the rotary support (11-2) is connected with the flange plate (1-2), and the outer ring of the rotary support (11-2) is connected with the bottom of the mounting seat (11).

4. A building floor slab cantilevered steel platform according to claim 2, wherein: The top adjusting component comprises a central bearing (7-1) arranged at the top of the pressing plate (3), a bidirectional screw rod (7) rotatably installed in the central bearing (7-1) and cross-arranged with the pressing plate (3), and two groups of extrusion pieces symmetrically arranged at the two ends of the bidirectional screw rod (7) and extruding the pressing block structure (5) to move downward. The two groups of extrusion pieces are the same in structure and each comprise a connecting block (9) threadedly sleeved on the bidirectional screw rod (7) and a wedge-shaped block (8) connected with the connecting block (9), and the wedge-shaped block (8) extrudes the pressing block structure (5) to move downward.

5. A building floor slab cantilevered steel platform according to claim 4 wherein: The pressing block structure (5) comprises two symmetrically arranged first pressing blocks (5-1), second pressing blocks (5-2) and limit pieces, the limit pieces comprise a first rack (5-1-1) connected with the first pressing block (5-1), a first gear (5-1-2) arranged in the second pressing block (5-2) and engaged with the first rack (5-1-1), a second rack (5-2-1) connected with the second pressing block (5-2), and a second gear (5-2-2) arranged in the first pressing block (5-1) and engaged with the second rack (5-2-1). The bottom ends of the first pressing block (5-1) and the second pressing block (5-2) are provided with vertically arranged baffles (5-4), and the top ends of the first pressing block (5-1) and the second pressing block (5-2) are provided with convex edges (5-3), the top surface of the convex edge (5-3) is higher than the top surface of the first pressing block (5-1) and the second pressing block (5-2), so that the top surface of the first pressing block (5-1) and the second pressing block (5-2) forms an extrusion groove (5-6), and the bottom of the pressing plate (3) is provided with two symmetrically arranged L-shaped bearing plates (4), and the bottom of the convex edge (5-3) and the horizontal part of the L-shaped bearing plate (4) are provided with a lower spring (5-5).

6. A building floor slab cantilevered steel platform according to claim 1, wherein: The Y-shaped support mechanism comprises a first fastener (16) arranged at the overhanging end of the I-beam (2), a first support rod (17) hinged to the bottom of the first fastener (16), a second fastener (18) arranged at the middle part of the I-beam (2), and a second support rod (19) hinged to the bottom of the second fastener (18), wherein the second support rod (19) is installed in the middle part of the first support rod (17) through a buckle (20), and the bottom end of the first support rod (17) is provided with a lower mounting seat (15); The first fastener (16) comprises two parallel upper and lower fastening plates (16-1) fitted to the top and bottom surfaces of the I-beam (2), and a plurality of first bolts (16-2) connecting the two fastening plates (16-1), wherein the first bolts (16-2) are located on both sides of the I-beam (2); The second fastener (18) comprises a lower L-shaped angle plate (18-1) fitted to the bottom surface of the I-beam (2), an upper fastening plate (18-2) parallel to the horizontal part of the lower L-shaped angle plate (18-1) and fitted to the top surface of the I-beam (2), and a plurality of second bolts connecting the horizontal part of the lower L-shaped angle plate (18-1) and the upper fastening plate (18-2), wherein the second bolts are located on both sides of the I-beam (2); one end of the second support rod (19) is hinged to the bottom surface of the horizontal part of the lower L-shaped angle plate (18-1); the first support rod (17) and the second support rod (19) are arranged in a Y shape; The vertical part of the lower mounting seat (15) and the lower L-shaped angle plate (18-1) is installed on the outer wall of the building.

7. A building floor slab cantilevered steel platform according to claim 1, wherein: The tensioning component (36) comprises a third fastener (27) arranged at the end of the overhanging end of the I-beam (2), a first clamping block (29) arranged on the third fastener (27) and capable of moving up and down, and a second clamping block (30) cooperating with the first clamping block (29) to clamp the steel wire rope (31); The third fastener (27) comprises a top seat (28) fitted to the top surface of the I-beam (2), a lower fastening plate (27-1) parallel to the top seat (28) and fitted to the bottom surface of the I-beam (2), and a plurality of third bolts (27-2) connecting the top seat (28) and the lower fastening plate (27-1), wherein the third bolts (27-2) are located on both sides of the I-beam (2); The bottom of the top base (28) is provided with an L-shaped seat (28-1), the L-shaped seat (28-1) is provided with a vertical screw rod (33) and two guide rods (34) symmetrically arranged on both sides of the vertical screw rod (33), both ends of the guide rod (34) are installed on the top base (28), and the top end of the vertical screw rod (33) extending out of the top base (28) is provided with a rotating part, and both ends of the vertical screw rod (33) are rotatably installed; A connecting seat (29-1) is arranged on the first clamping block (29), the connecting seat (29-1) is provided with a threaded hole for threadedly connecting the vertical screw rod (33) and a guide hole for mounting the two guide rods (34); The side surfaces of the first clamping block (29) and the second clamping block (30) close to each other are provided with clamping grooves (32) for clamping the steel wire rope (31), a plurality of connecting rods (29-2) are arranged on the first clamping block (29) and pass through the second clamping block (30), and the second clamping block (30) is provided with locking nuts (30-1) matched with the connecting rods (29-2).

8. A method of installing a cantilevered steel platform for a building floor slab as claimed in claim 2, characterised in that, The method comprises the following steps: Step one, installation of U-shaped bolts and I-beams: Step 101, burying a plurality of U-shaped bolts (1) on the building floor slab (6); wherein the straight rod sections (1-1) of the plurality of U-shaped bolts (1) are sleeved with anchor plates (12), and the anchor plates (12) are cast and buried in the building floor slab (6); Step 102, installing an I-beam (2) on the building floor slab (6), and the I-beam (2) is located between the two straight rod sections (1-1) of the plurality of U-shaped bolts (1); Step two, installation and adjustment of the left and right fastening mechanisms and the top locking mechanism to fasten the I-beam: Step 201, installing left and right fastening mechanisms on the two straight rod sections (1-1) of the U-shaped bolt (1) extending out of the building floor slab (6); wherein the left and right fastening mechanisms are located outside the U-shaped bolt (1); Step 202, rotating the rotating seat (11) around the straight rod section (1-1) of the U-shaped bolt (1) to rotate so that the two left and right fastening mechanisms are located inside the U-shaped bolt (1), and the clamping plates (13) are driven by the telescopic guide components to move close to the web of the I-beam (2), until the two clamping plates (13) clamp the web of the I-beam (2); Step 203, adjusting the first pressing block (5-1) and the second pressing block (5-2) of the pressing block structure (5) to move away from each other until the distance between the baffle (5-4) in the first pressing block (5-1) and the baffle (5-4) in the second pressing block (5-2) meets the width of the top plate of the I-beam (2); And connecting the lower springs (5-5) in the first pressing block (5-1) and the second pressing block (5-2) with the horizontal part of the L-shaped bearing plate (4); Step 204, installing the top locking mechanism on the two straight rod sections (1-1) of the U-shaped bolt (1); Step 205, adjusting the pressing block structure (5) to move close to the top plate of the I-beam (2) by the top adjusting component, until the first pressing block (5-1) and the second pressing block (5-2) tightly adhere to the top of the I-beam (2), so as to fasten the top of the I-beam (2); Step three, installation of Y-shaped support mechanism: Step 301, install a first fastener (16) at the overhanging end of the I-beam (2) extending out of the building floor slab (6), and install a second fastener (18) at the middle of the I-beam (2); Step 302, articulate a first support rod (17) at the bottom of the first fastener (16), articulate a second support rod (19) at the bottom of the second fastener (18), and install the second support rod (19) on the middle of the first support rod (17) through a buckle (20); Step 303, install a lower mounting seat (15) at the bottom end of the first support rod (17), and install the lower mounting seat (15) and the vertical part of the L-shaped angle plate (18-1) of the second fastener (18) on the building outer wall through expansion bolts; Step four, installation of walking plate connecting piece and walking plate: Step 401, set rubber pads (26) in the grooves (21-1) on the bottom surface of the supporting plate (21), and install the supporting plate (21) at the overhanging end of the I-beam (2); Step 402, connect the bottom surfaces of the two sides of the supporting plate (21) through a bottom plate (24); wherein the bottom plate (24) is arranged on the bottom surface of the I-beam (2), the long bolts (23) are located on both sides of the I-beam (2), and the rubber pads (26) are arranged on the top surface of the I-beam (2); Step 403, insert the hooks (25-2) at both ends of the walking plate (25) into the hanging openings (22) of the adjacent two supporting plates (21) at the same height; Step five, repeat steps one to four to install multiple overhanging steel platforms (10) and walking plates (25) along the height direction of the building; Step six, installation of tensioning component and steel wire rope: Step 601, install a third fastener (27) at the end of the overhanging end of the I-beam (2); wherein a first clamping block (29) is arranged on the third fastener (27); Step 602, adjust the first clamping block (29) to move up and down along the vertical lead screw (33) through the vertical lead screw (33) on the third fastener (27) until the clamping groove (32) on the first clamping block (29) corresponds to the curved part of the steel wire rope (31), and then embed the steel wire rope (31) into the clamping groove (32); Step 603, install a second clamping block (30) to make the clamping groove (32) on the second clamping block (30) cooperate with the protruding part of the steel wire rope (31), and install a locking nut (30-1) on the end of the connecting rod (29-2) after the connecting rod (29-2) passes through the second clamping block (30).

9. The method of installing according to claim 8, wherein: Step 202, the specific process is as follows: Step 2021, rotate the mounting seat (11) through the rotary support (11-2) around the straight rod section (1-1) of the U-shaped bolt (1) to make the two left and right fastening mechanisms located on the inner side of the U-shaped bolt (1); Step 2022, loosen the front and rear locking nuts (11-3), release the locking of the connecting part (13-1), the spring (14) is elongated to push the clamping plate (13) to move, at the same time, the waist-shaped adjusting hole (13-2) of the connecting part (13-1) moves along the connecting bolt (11-1), the clamping plate (13) moves close to the web of the I-beam (2), until the clamping plate (13) clamps the web of the I-beam (2); Step 2023, tighten the front and rear locking nuts (11-3) to lock the connecting part (13-1); Step 203, the specific process is as follows: Operation of the first rack (5-1-1) in the first press block (5-1) around the first gear (5-1-2), while operating the second rack (5-2-1) around the second gear (5-2-2), so that the first press block (5-1) and the second press block (5-2) move away from each other, until the distance between the baffle (5-4) in the first press block (5-1) and the baffle (5-4) in the second press block (5-2) meets the width of the top plate of the I-beam (2); Step 205, the specific process is as follows: Through the rotating head (7-2) to drive the bidirectional screw rod (7) to rotate, the bidirectional screw rod (7) rotates to drive the two connecting blocks (9) to drive the two wedge-shaped blocks (8) to move close, the wedge-shaped blocks (8) are inserted into the extrusion groove (5-6) on the top surface of the first press block (5-1) and the second press block (5-2) to extrude the first press block (5-1) and the second press block (5-2) to move downward, until the top of the first press block (5-1) and the second press block (5-2) tightly abuts the top of the I-beam (2), realizing the fastening of the top of the I-beam (2).

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