Adjustable limiting device for preventing profile steel cantilever discharging platform from moving backwards
By welding concave and convex toothed racks onto the cantilevered I-beam main beam and using a steel pressure plate double nut system, the problem of slippage of the cantilevered steel unloading platform was solved, achieving stable limiting under different clearances and reducing construction costs and time.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGXI CONSTR FIRST CONSTR ENG GRP CO LTD
- Filing Date
- 2025-05-06
- Publication Date
- 2026-04-10
AI Technical Summary
Existing steel cantilever unloading platforms are prone to sliding backward during use, causing safety hazards. Furthermore, traditional stops cannot adapt to changes in clearance between different building structures, resulting in frequent replacements or increased processing time.
A continuous first square steel bar is welded to the upper surface of the cantilevered I-beam main beam to form a toothed rack, and the platform slippage is restricted by a steel pressure plate and a double nut system. Adjustable components A and B are used to achieve the limit and adapt to different clearance changes.
It effectively prevents the steel cantilever unloading platform from slipping, improves the versatility and adaptability of the device, reduces process time and cost, and ensures safety.
Smart Images
Figure CN224106916U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of building construction device especially relates to adjustable spacing device of prevent type steel cantilever unloading platform rear shift. BACKGROUND
[0002] At present, the beam slab wall column cast-in-place structure construction in the field of main reinforced concrete cast-in-place structure construction of housing engineering, the cast-in-place structure construction generally adopts steel pipe fastener + square wood + wood formwork support system, after the concrete age of the layer cast-in-place structure beam slab meets the condition of form removal, the type steel cantileive unloading platform installed through the tower crane in batches is used to transfer the turnover materials such as steel pipe fastener, square wood and wood formwork after form removal to the three upper layers of the building to be constructed to continue to be used circularly, and the type steel cantilever unloading platform is also transferred upward layer by layer to be disassembled and used circularly until the single structure is capped. The construction principle of the type steel cantilever unloading platform is that the cantilever I-beam of the platform is installed and fixed through the front end and rear end embedded U-shaped steel anchor ring at the specified position of the structure concrete beam slab, the upper end of the U-shaped steel anchor ring is provided with screw threads of a certain length, and the cantilever I-beam is locked in the U-shaped anchor ring through the steel plate, steel gasket and double nuts; two inclined steel wire ropes (including outer rope and inner rope) are arranged on both sides of the load table of the type steel cantilever unloading platform and are pulled upward and inward to be anchored on the anchor ring of the structure closing beam of the upper layer and the second upper layer, and the inclined steel wire rope is the main stressed member of the whole type steel cantilever unloading platform. Under the influence of the upward and inward inclined steel wire rope, the I-beam of the type steel cantilever unloading platform will slide to the rear of the building floor, causing the load table of the type steel cantilever unloading platform to extrude the outer frame stand, which will seriously affect the safety of the outer frame and the normal use of the platform. The current conventional method is that a piece of angle steel with the same width as the I-beam and with a cross section not less than 100x100x5mm is welded on the lower surface of the cantilever I-beam on both sides of the type steel cantilever unloading platform near the position close to the building peripheral closing beam in the vertical direction of the length of the I-beam, which is used as a stop block to tightly press the building peripheral closing beam to prevent the type steel cantilever unloading platform from sliding backward. However, in engineering practice, the stop block of the angle steel has great limitations, because the same type steel cantilever unloading platform can be installed on the upper and lower layers of the same building single body for circular use, or can be installed on different building single bodies or different project single bodies for circular use. Therefore, the type steel cantilever unloading platform needs an adjustable spacing device to prevent the platform from moving backward. SUMMARY
[0003] The utility model discloses a prevent type steel cantilever unloading platform rearward moving adjustable limiting device, solve the technical problem of the present cantilever unloading platform of type steel backward slipping. Steel pressing plate utilizes The two side convex points below the steel pressing plate are clamped into the recess of the top of the I-beam, forming upper and lower concave-convex teeth, which limits the backward slipping of the cantilever unloading platform of type steel.
[0004] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme as follows:
[0005] A prevent type steel cantilever unloading platform rearward moving adjustable limiting device, including A component and B component, the B component includes I-beam and a plurality of first square steels, the I-beam front end is close to the front end U type anchor ring of the pre-buried sealing beam, and the I-beam is arranged in the front end U type anchor ring, a plurality of first square steels are respectively equidistantly arranged on the upper surface of the I-beam, so that the recess is formed between the two first square steels, the lower end of A component is clamped in the recess, the upper end of A component is arranged on the front end U type anchor ring, the upper of both ends of A component is provided with iron pad and double nut respectively, and the iron pad and double nut are arranged on the front end U type anchor ring respectively.
[0006] Further, the first square steel and the I-beam are connected by welding, and the length direction of the first square steel is horizontally orthogonal to the length direction of the I-beam.
[0007] Further, the A component includes a steel plate and two second square steels, the two second square steels are arranged on both sides of the bottom of the long side of the steel plate respectively, and the cross section of the steel plate and the two second square steels is Further, the two ends of the steel plate are provided with anchor hole respectively, the both ends of the front end U type anchor ring pass through the anchor hole respectively, so that the steel plate is connected on the front end U type anchor ring.
[0008] Further, the top of the two second square steels is connected with the steel plate by welding, and the bottom of the two second square steels is clamped in the recess respectively.
[0009] Further, the iron pad is sleeved on the front end U type anchor ring, and the iron pad is arranged between the double nut and the A component, and the double nut is screwed on the front end U type anchor ring.
[0010] Further, the iron pad is sleeved on the front end U type anchor ring, and the iron pad is arranged between the double nut and the A component, and the double nut is screwed on the front end U type anchor ring.
[0011] The utility model discloses a limiting device for steel cantilever unloading platform, which belongs to the field of steel cantilever unloading platform.
[0012] 1、The limiting device is provided with the first square steel which is equidistantly and spacedly arranged on the upper surface of the I-shaped steel girder, so that the upper surface of the I-shaped steel girder forms a continuous concave-convex rack, and the upper end of the A component of the type is clamped into the groove on the upper surface of the I-shaped steel girder, thereby forming upper and lower concave-convex tooth engagement, so as to limit the backward sliding of the steel cantilever unloading platform.
[0013] 3、The limiting device is suitable for the case that the net distance between the object table of the same steel cantilever unloading platform and the outer edge of the building structure changes within a certain range. The two side convex points of the lower end of the A component can still be clamped into the rack groove formed between the continuous multiple square steels welded on the top of the I-shaped steel, so as to still limit the backward sliding of the steel cantilever unloading platform, and the universality and adaptability are high, the process time and cost can be reduced while ensuring safety. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 is a top view of the limiting device installation application of the utility model;
[0015] Figure 2 is Figure 1 the enlarged view of A in the figure;
[0016] Figure 3 is a side view of the limiting device installation application of the utility model;
[0017] Figure 4 is Figure 3 the enlarged view of B in the figure;
[0018] Figure 5 is a sectional view of the A component of the utility model;
[0019] Figure 6 is a side view of the B component of the utility model;
[0020] Figure 7 is a sectional view of the B component of the utility model.
[0021] In the drawings, 1 is an I-shaped steel girder, 2 is a first square steel, 3 is a front end U-shaped anchor ring, 4 is a steel plate, 5 is a second square steel, 6 is a groove, 7 is an iron gasket, and 8 is a double nut. DETAILED DESCRIPTION
[0022] For the purpose, technical scheme and advantages of the utility model to be clearer and more intelligible, the following preferred embodiments are referred to the drawings and are given, and the utility model is further explained in detail. However, it should be explained that many details listed in the specification are only for making the reader have a thorough understanding of one or more aspects of the utility model, and even without these specific details, the aspects of the utility model can be realized.
[0023] As Figures 1-7 The utility model discloses an adjustable limiting device for preventing the rear shift of steel cantilever unloading platform, which comprises an A component and a B component, the B component comprises an I-beam main beam 1 and a plurality of first square steels 2, the I-beam main beam 1 is provided with a front end U-shaped anchor ring 3 near the front end of the sealing beam, and the I-beam main beam 1 is arranged in the front end U-shaped anchor ring 3 to limit the I-beam main beam 1 in the front end U-shaped anchor ring 3, the plurality of first square steels 2 are arranged on the upper surface of the I-beam main beam 1 at equal intervals, and a groove 6 is formed between the adjacent two first square steels 2, the lower end of the A component is clamped in the groove 6, the upper end of the A component is arranged on the front end U-shaped anchor ring 3, the upper part of the two ends of the A component is respectively provided with an iron gasket 7 and a double nut 8, and the iron gasket 7 and the double nut 8 are arranged on the front end U-shaped anchor ring 3, and the cross section of the A component is in the shape of The limiting device is arranged on the upper surface of the I-beam main beam 1, the upper surface of the I-beam main beam 1 forms a continuous concave-convex rack, the lower end of the A component in the shape of The lower end of the A component in the shape of
[0024] As Figure 2 And Figures 4-5 The A component comprises a steel plate 4 and two second square steels 5, the two second square steels 5 are arranged on the two sides of the bottom of the long side of the steel plate 4 respectively, the second square steel 5 is connected with the steel plate 4 through welding, and the cross section of the steel plate 4 and the two second square steels 5 is in the shape of The A component is arranged at the position of the front end U-shaped anchor ring 3, The two side protrusions (two second square steels 5) under the A component are clamped into the grooves 6 on the upper surface of the I-beam 1, forming an upper and lower concave-convex tooth engagement. The two ends of the steel plate 4 are respectively provided with anchor ring holes, and the two ends of the front end U-shaped anchor ring 3 are respectively inserted through the anchor ring holes, so that the steel plate 4 is connected to the front end U-shaped anchor ring 3, and the steel plate 4 is sleeved on the front end U-shaped anchor ring 3 through the anchor ring holes, and the iron gasket 7 is used to fix it. The top ends of the two second square steels 5 are connected to the steel plate 4 by welding, and the bottom ends of the two second square steels 5 are respectively clamped in the grooves 6. The iron gasket 7 is sleeved on the front end U-shaped anchor ring 3, and the iron gasket 7 is arranged between the double nuts 8 and the A component, and the double nuts 8 are screwed on the front end U-shaped anchor ring 3. The A component is fixed on the front end U-shaped anchor ring 3 through the iron gasket 7 and the double nuts 8, and the A component is clamped in the groove 6 of the B component, forming an upper and lower concave-convex tooth engagement, thereby limiting the backward sliding of the steel cantilever unloading platform.
[0025] As shown in Figure 4 and Figures 6-7 , the first square steel 2 is connected to the I-beam 1 by welding, and the length direction of the first square steel 2 is horizontally orthogonal to the length direction of the I-beam 1. The first square steel 2 welded on the upper surface of the I-beam 1 is basically on the same horizontal line, forming a continuous concave-convex rack with consistent left and right steps.
[0026] The utility model discloses a type steel overhanging unloading platform is provided with two sets of I-shaped steel main beams, and the two sets of I-shaped steel main beams are connected with the I-shaped steel main beam of the type steel overhanging unloading platform through the first square steel and the second square steel.
[0027] One of the manufacturing processes of the A component: the A component includes a steel pressing plate of a "" type. It is welded by a steel plate 4 of 220x100x15mm and two square steels 5 of 15x15x220. The steel plate 1 is drilled with two holes, and the bottom of the long side of the steel plate 4 is fully welded with a second square steel 4.
[0028] One of the manufacturing processes of the B component: the B component includes the first square steel 2 of 15x15x100mm which is continuously welded in the front and back range of 200mm (or wider) of the top surface of the front end U-shaped anchor ring area of the two sets of I-shaped steel main beams 1 (taking 18# I-shaped steel as an example) of the type steel overhanging unloading platform, and the length direction of the first square steel 2 is basically 90 degrees with the length direction of the I-shaped steel main beam 1. Figure 6 As shown in the figure, the vertical concave point formed has the specification of 20 (width) x15mm (depth), and the convex point has the specification of 15 (width) x15mm (height).
[0029] Embodiment
[0030] AsFigure 1 and Figure 3 As shown in the drawings, assuming that the steel cantilever unloading platform is to be installed on the Nth floor, N+1th floor, N+2th floor, and N+nth floor, therefore, when the reinforced concrete structure beam slab of the Nth floor, N+1th floor, N+2th floor,..., and N+nth floor is constructed, considering the need for installation and anchoring of the two cantilever I-beam main beams (taking 18# I-beam as an example) of the steel cantilever unloading platform in the future, a group of U-shaped threaded U-shaped steel anchor rings (hereinafter referred to as front-end U-shaped anchor rings, taking 18 as an example) are pre-buried at the front end of the proposed installation position of each parallel cantilever I-beam main beam of each floor, 100 mm away from the sealing beam, two groups of U-shaped steel anchor rings (hereinafter referred to as end U-shaped anchor rings, taking 18 as an example) are pre-buried 200 mm apart, 200 mm away from the end of the cantilever I-beam main beam. Generally, the thickness of the cast-in-place reinforced concrete floor is 100-120 mm, the two I-beam main beams of the steel cantilever unloading platform are 6-meter-long 18# I-beams, the front-end U-shaped anchor ring is a U-shaped steel anchor ring (450+120 (internal clearance)+450 mm) made of a diameter 18 mm round steel with threaded ends (threaded length about 100 mm), and the rear-end U-shaped anchor ring is a U-shaped steel anchor ring (350+120 (internal clearance)+350 mm) made of a diameter 18 mm round steel with threaded ends (threaded length about 100 mm). That is, when the reinforced concrete structure beam slab of the Nth floor, N+1th floor, N+2th floor,..., and N+nth floor is constructed, the position of each parallel cantilever I-beam main beam of each floor is pre-buried with the front-end U-shaped anchor ring and the rear-end U-shaped anchor ring according to the conventional requirements along with the construction progress of the floor.
[0031] The installation process of the Nth layer type steel cantilever unloading platform: 1. Within the tower crane working radius, according to the construction scheme requirements of the type steel cantilever unloading platform, first complete the welding or bolting assembly of the platform on the outdoor flat ground, including the platform main beam, secondary beam, bottom plate, railing, and platform hoisting steel wire rope, platform working steel wire rope and safety steel wire rope are sequentially assembled, check the integrity and stability of the type steel cantilever unloading platform, and try to hoist. 2. The tower crane hook hooks the platform hoisting steel wire rope, reaches the Nth floor near the outer frame, and temporarily removes the safety net near the platform to be installed. 3. The tower crane continues to cooperate, guides the platform I-beam cantilever to the structure floor plate direction, passes through the outer frame, and is nested and seated inside the front U-shaped anchor ring and the rear U-shaped anchor ring of the Nth layer, adjusts the safe net distance of the unloading platform load table and the outer frame outer stand (usually 10 to 30 mm), installs and tension the inner and outer inclined steel wire ropes of the platform, so that the outer end of the platform is slightly higher than the inner end by 20 to 30 mm, and the inclined outer rope is truly stressed. 4. On the top of the I-beam in the range of 200mm (or wider) before and after the front U-shaped anchor ring, continuously weld the first square steel (specification 15x15x100mm) with a net distance of 20mm, the length direction of the above first square steel is basically 90 degrees horizontally orthogonal to the length direction of the I-beam, and the two first square steels welded on the upper surfaces of the cantilever I-beams are basically on the same horizontal line, forming a 400mm long and step consistent continuous concave-convex rack. 5. At the position of the front U-shaped anchor ring, the two side convex points below the "steel pressing plate" are clamped into the concave groove on the top of the I-beam, forming an upper and lower concave-convex tooth combination, and the conventional steel gasket and double nuts are continuously inserted; the rear U-shaped anchor ring is sequentially inserted into the conventional steel pressing plate, steel gasket and double nuts according to the conventional requirements, the inclined steel wire ropes on both sides of the platform are tensioned, and the inside of the front and rear U-shaped anchor rings is tightly plugged with wooden wedges. 6. Remove the hoisting rope of the tower crane. 7. After filling the walkway plate between the load table of the unloading platform and the outer edge of the building structure, completing the surrounding safety net and protective railing, organize the acceptance and use of the Nth layer type steel cantilever unloading platform.
[0032] The process of transferring the Nth layer type steel cantilever unloading platform to the N+1th layer for continuing circulation is as follows: 1. The Nth layer type steel cantilever unloading platform is cleaned first, and then the tower crane hook is hooked to the platform hoisting wire, the unloading platform is slightly lifted, and the upper end connecting buckle (including the inner and outer wires) of the two inclined cables on both sides of the unloading platform, the front end U-shaped anchor ring of the platform cantilever main beam, the double nuts of the end U-shaped anchor ring, the steel gasket and the steel pressing plate are sequentially removed. 2. The tower crane hook is hooked to the platform hoisting wire, and when it reaches the N+1th layer floor outside the frame, the safety net near the platform to be installed is temporarily removed. 3. The tower crane continues to cooperate and guide the platform cantilever I-beam to pass through the outer frame, and is seated in the front end U-shaped anchor ring and the rear end U-shaped anchor ring of the N+1th layer. The load table of the unloading platform is adjusted to have a safe distance from the outer vertical rod of the frame, the inner and outer inclined cables of the platform are installed and tensioned, the outer end of the platform is slightly higher than the inner end by 20-30mm, and the outer inclined cable is truly stressed. 4. At the N+1th layer, the front end U-shaped anchor ring is positioned, the two side protrusions below the steel pressing plate are clamped into the recess on the top of the I-beam, the upper and lower concave-convex teeth are combined, the conventional steel gasket and double nuts are sequentially inserted, and the rear end U-shaped anchor ring is sequentially inserted into the conventional steel pressing plate, steel gasket and double nuts. The inner side of the front and rear end U-shaped anchor rings is tightly wedged. 5. The hoisting wire of the tower crane is removed. 6. After the gap between the load table of the unloading platform and the outer edge of the building structure is fully paved with walkway plates, the surrounding safety net and guardrails are completed, the N+1th layer type steel cantilever unloading platform is organized for acceptance and use.
[0033] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the technical field, without departing from the principle of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection range of the present application.
Claims
1. A kind of adjustable limiting device of preventing type steel cantilever unloading platform from moving back, it is characterized by: The utility model provides a kind of steel structure, including A component and B component, the B component includes I-beam girder (1) and several first square steels (2), the I-beam girder (1) front end is embedded front end U type anchor ring (3) near sealing beam, and I-beam girder (1) is arranged in front end U type anchor ring (3), the several first square steels (2) are respectively equidistantly spaced in the upper surface of I-beam girder (1), so that recess (6) is formed between adjacent two first square steels (2), the lower end of A component is clamped in recess (6), the upper end of A component is arranged on front end U type anchor ring (3), and the upper of both ends of A component is respectively provided with iron gasket (7) and double nut (8), and iron gasket (7) and double nut (8) are respectively arranged on front end U type anchor ring (3).
2. The adjustable limiting device for preventing the rearward movement of a cantilevered type steel unloading platform according to claim 1, characterized in that: The first square steel (2) is connected with the I-beam girder (1) by welding, and the length direction of the first square steel (2) is horizontally orthogonal to the length direction of the I-beam girder (1) at 90 degrees.
3. The adjustable limiting device for preventing the rearward movement of a cantilevered type steel unloading platform according to claim 1, characterized in that: The A component includes a steel plate (4) and two second square steels (5) arranged respectively on both sides of the bottom of the long side of the steel plate (4), and the cross section of the steel plate (4) and the two second square steels (5) is -shaped.
4. The adjustable limiting device for preventing the rearward movement of a cantilevered type steel unloading platform according to claim 3, characterized in that: Both ends of the steel plate (4) are provided with anchor ring holes, and both ends of the front end U type anchor ring (3) pass through the anchor ring holes, so that the steel plate (4) is connected to the front end U type anchor ring (3).
5. The adjustable limiting device for preventing the rearward movement of a cantilevered discharge platform of a section steel, according to claim 3, characterized in that: The top ends of the two second square steels (5) are connected with the steel plate (4) by welding, and the bottom ends of the two second square steels (5) are clamped in the recess (6) respectively.
6. The adjustable limiting device for preventing the rearward movement of a cantilevered type steel unloading platform according to claim 1, characterized in that: The iron gasket (7) is sleeved on the front end U type anchor ring (3), and the iron gasket (7) is arranged between the double nut (8) and the A component, and the double nut (8) is tightened on the front end U type anchor ring (3).