A cantilevered support frame fixing device

Abstract

The utility model relates to a kind of cantilever support frame fixing device, cantilever support frame includes horizontal section and vertical section being built mutually, the fixing device is installed in cantilever support frame side, and the fixing device includes: oblique fixed part: oblique installation in the side of support frame in suspension;First reinforcing part: transverse installation in the side, first reinforcing part one side is suspended setting, and the other side is fixed setting;Connecting piece: including the first end and second end with preset included angle, preset included angle corresponds with oblique fixed part, the first end is fixedly connected with oblique fixed part, and the second end is erected in first reinforcing part.In the utility model, oblique fixed part is connected with vertical section to realize oblique anti-overturning, oblique fixed part and first reinforcing part are fixedly connected by connecting piece, combined with the triangular suspension structure of first reinforcing part itself, wind load resistance and construction load of support frame in construction process can be effectively balanced, can be used for subsequent residential roof flower stand construction, reuse rate is high, significantly reduce construction cost, meet green construction requirement.

Description

Technical Field

[0001] This utility model relates to the field of cantilever formwork support frame construction, specifically, to a cantilever support frame fixing device. Background Technology

[0002] In the construction of cantilevered formwork support frames for rooftop cantilevered scaffold structures, temporary anti-overturning is the core aspect of ensuring safety. Existing technologies mostly revolve around building a system of steel bearing capacity and tie-restraint. Common practices include: using I-beams as the bearing components of the cantilever foundation, pre-embedding fixed bolts, sleeves, and other components in the roof floor slab, anchoring diagonal bracing rods or flexible unloading steel wire ropes to the main building structure, or simply connecting the diagonal tie-restraint components to the horizontal and vertical sections of the scaffold structure with steel pipe fasteners to balance the construction load and the crosswind load. However, for the specific scenario of high-rise residential roofs built over railways, such solutions have significant limitations: railway-built buildings have high roof heights and unobstructed surroundings, resulting in wind loads far exceeding those of ordinary buildings. Flexible steel wire ropes are prone to slackening and vibration under strong winds, making it difficult to form stable anti-overturning constraints. Furthermore, most solutions limit diagonal bracing to the internal structure of the frame, failing to effectively utilize the existing roof structure to create a rigid force transmission path. Moreover, many embedded components are single-use, increasing construction costs and failing to meet the practical needs of "temporary support and reuse" in the construction of cantilevered scaffolds. These problems make it difficult for existing anti-overturning technologies to simultaneously address the wind resistance stability and construction economy of railway-built structures, necessitating a targeted optimization solution. Utility Model Content

[0003] To address the shortcomings of the existing technology, this utility model provides a cantilever support frame fixing device.

[0004] The technical solution of this utility model is as follows: A cantilever support frame fixing device is provided. The cantilever support frame includes horizontal and vertical sections that are interlocked. The fixing device is detachably installed on the side of the cantilever support frame and includes: Inclined fastener: Installed obliquely on the side of the suspended support frame and fixedly connected to the vertical section; First reinforcing member: It is installed laterally on the side, with one side of the first reinforcing member suspended and the other side fixed. Connector: The connector includes a first end and a second end with a preset angle. The preset angle is set in correspondence with the inclined fixing member. The first end is fixedly connected to the inclined fixing member, and the second end is mounted on the first reinforcing member.

[0005] As a preferred embodiment, a steel rope is provided on one side of the first reinforcing member, and a cantilever support frame is used to install on the first roof and the second roof, which are distributed vertically. One end of the steel rope is fixed to the first roof, and the other end is tied to the outside of the first reinforcing member. The inside of the first reinforcing member is fixed to the second roof, forming a triangular suspension fixing structure.

[0006] As a preferred embodiment, the outer side of the end where the connector connects to the inclined fixing member is provided with a full-welded structure along its axis. The full-welded structure is used to connect and fix the bottom end of the inclined fixing member, and the full-welded length is 70-150mm.

[0007] As a preferred embodiment, the first reinforcing member is an I-beam, and the inner side of the I-beam is provided with bolts for fixing to the second roof.

[0008] As a preferred option, the connector includes a plain round steel bar with a diameter of 15-40mm.

[0009] As a preferred embodiment, a second reinforcing member is provided parallel to and fixedly connected above the first reinforcing member. The second reinforcing member is parallel to the first reinforcing member and fixedly connected to the vertical section. A swivel fastener is provided on the second reinforcing member at the angle between the second reinforcing member and the inclined fixing member.

[0010] As a preferred embodiment, the middle part of the inclined fastener is fixedly connected to the first position of the vertical section to form a first fixing point, the second reinforcing member is fixedly connected to the second position of the vertical section to form a second fixing point, and the swivel fastener forms a third fixing point. The first fixing point, the second fixing point, and the third fixing point form a right-angled triangle fixing structure.

[0011] As a preferred embodiment, right-angle fasteners are provided at the first and second fixing points to achieve a fixed connection with the vertical section.

[0012] Furthermore, a third reinforcing member is fixed below the angle between the oblique fixing member and the second reinforcing member, and the second and third reinforcing members form a longitudinal and transverse fixing structure.

[0013] As a preferred embodiment, the preset included angle is 30-60°.

[0014] As a preferred option, the inclined fixing member is a steel pipe with an inner diameter of 40-60mm, and the bottom end of the steel pipe is connected to the top of the reinforcing member through a connector.

[0015] As a preferred embodiment, the vertical section includes a first vertical section and a second vertical section, the first vertical section being higher than the second vertical section. Multiple first vertical sections are arranged and installed on the outer side of the cantilever support frame, and multiple second vertical sections are arranged in parallel on the inner side of the cantilever support frame. The inclined fixing member and the second reinforcing member are fixedly connected to one side of the second vertical section.

[0016] The advantages of this utility model based on the above solution are as follows: In this invention, the inclined fixing component is installed obliquely on the side of the suspended support frame and is fixedly connected to the horizontal and vertical sections of the frame. Its core function is to directly balance the construction load and wind load of the support frame through oblique support, effectively resisting the tendency of the frame to overturn. The first reinforcing component is suspended on one side by steel rope and rigidly fixed on the other side, which can reliably transfer the force of the frame to the roof structure, avoiding the instability caused by relying solely on the frame's own bracing. The connecting component further enhances the connection strength between the inclined fixing component and the horizontal and vertical sections, ensuring that the rigid connection between each component is secure. The three components work together to form a stable anti-overturning system, significantly improving the overall rigidity and anti-overturning capacity of the suspended support frame. At the same time, there is no need to pre-embed components in the roof layer, avoiding the risk of leakage while ensuring construction convenience. Attached Figure Description

[0017] Figure 1 This is a side view of the cantilever support frame of this utility model; Figure 2 This is a front view of the cantilever support frame of this utility model; Figure 3 for Figure 1 A magnified view of a section of the connecting part; Figure 4 for Figure 3 A cross-sectional view of the connecting member in the middle relative to the first reinforcing member; In the diagram, 110. Horizontal section; 120. Vertical section; 210. Angled fixing member; 220. First reinforcing member; 230. Second reinforcing member; 240. Third reinforcing member; 300. Connectors; 410. First roof; 420. Second roof. Detailed Implementation

[0018] To better understand the purpose, technical solution, and technical effects of this utility model, the following description, in conjunction with the accompanying drawings and embodiments, will provide further explanation. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need further definition and explanation in subsequent drawings. It is also stated that the embodiments described below are only for explaining this utility model and are not intended to limit it.

[0019] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there may be an intermediate component.

[0020] The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed when in use, or the orientation or positional relationship in which a person skilled in the art would normally understand it, or the orientation or positional relationship in which the product is usually placed when in use. It is only for the purpose of facilitating the description of this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Example 1

[0021] like Figures 1-4 As shown, one application scenario is for the construction of a cantilevered scaffold structure on the roof of a high-rise residential building above a railway. In this scenario, the roof height is ≥25m, and the wind load on the surrounding unobstructed area is ≥1.5kN / ㎡. A cantilevered formwork support frame needs to be erected. The cantilevered support frame consists of a horizontal section 110 and a vertical section 120 that are built together. The horizontal section 110 uses steel pipes with a diameter of 48mm and a wall thickness of 3.0mm, and the vertical section 120 uses uprights with a diameter of 48mm and a wall thickness of 3.0mm. The uprights are spaced 1.2m apart, and the step distance of the horizontal section 110 is 1.8m. The cantilevered support frame is further fixed by a fixing device described in this utility model.

[0022] A cantilever support frame fixing device, wherein the fixing device is detachably installed on the side of the cantilever support frame, and the fixing device includes: Inclined fastener 210: installed obliquely on the side of the suspended support frame, and fixedly connected to the vertical section 120; First reinforcing member 220: It is installed laterally on the side, with one side of the first reinforcing member 220 suspended and the other side fixedly installed; Connector 300: Connector 300 includes a first end and a second end with a preset angle. The preset angle is set in correspondence with the inclined fixing member 210. The first end is fixedly connected to the inclined fixing member 210, and the second end is mounted on the first reinforcing member 220.

[0023] The preset included angle is 30-60°, specifically 45°; Furthermore, the inclined fixing member 210 is a steel pipe with an inner diameter of 40-60mm, and the bottom end of the steel pipe abuts against the top of the reinforcing member via a connector 300. A steel rope is provided on one side of the first reinforcing member 220. The cantilever support frame is installed directly in front of the first roof 410 and the second roof 420. One end of the steel rope is pre-embedded in the first roof 410, and the other end is bound to the outside of the first reinforcing member 220. The inside of the first reinforcing member 220 is fixed to the second roof 420, forming a triangular suspension fixing structure. The first reinforcing member 220 is an I-beam, and bolts for fixing it to the second roof 420 are provided on the inside of the I-beam.

[0024] Specifically, the first reinforcing member 220 includes the cantilevered I-beam, which bears the self-weight of the frame, construction live load, and wind load, transferring the load to the main roof structure and preventing instability of the frame on the suspended side. Based on the cantilever dimensions of the roof pergola, hot-rolled I18 I-beams can be selected, with a cross-sectional height of 180mm, a leg width of 94mm, and a web thickness of 6.5mm. The length of a single I-beam equals the internal anchorage length of the main roof structure (4.2m) plus the cantilever length (2.8m), for a total length of 7.0m. One end of the I-beam is fixed to the main roof slab (second roof 420) with an M20 chemical anchor bolt, with an insertion depth of 150mm and a concrete matrix strength of C30. The other end is suspended and extended outwards via a steel rope. The I-beam includes a flange top surface, which is flush with the roof structural layer, ensuring that the formwork support frame uprights can be directly erected on the flange without additional padding or leveling.

[0025] During construction, first, mark the installation axis of the I-beams, parallel to the width of the pergola, at 1.5m intervals, consistent with the spacing of the support frame uprights. Then, drill holes and insert chemical anchors to fix the I-beams. After installation, use a level to calibrate the levelness of the upper flange of the I-beams. The I-beams, as the load-bearing base, can directly support the anchoring requirements of subsequent structural components, eliminating the need to pre-embed other load-bearing components in the roof layer and reducing the risk of leakage from the source.

[0026] Furthermore, a second reinforcing member 230 is fixedly connected parallel to the upper side of the first reinforcing member 220. The second reinforcing member 230 is parallel to the first reinforcing member 220 and fixedly connected to the vertical segment 120. The second reinforcing member 230 is provided with a rotating fastener fixed at the included angle of the inclined fastener 210. The middle part of the inclined fastener 210 is fixedly connected to the first position of the vertical segment 120 to form a first fixing point. The second reinforcing member 230 is fixedly connected to the second position of the vertical segment 120 to form a second fixing point. The rotating fastener forms a third fixing point. The first fixing point, the second fixing point, and the third fixing point form a right-angled triangle fixing structure. The first fixing point and the second fixing point are provided with right-angle fasteners to achieve a fixed connection with the vertical segment 120.

[0027] Specifically, the second reinforcing member 230 includes a horizontal tie steel pipe, which is a rigid lateral restraint component used to limit the displacement of the formwork support frame in the horizontal direction and perpendicular to the outward projection direction of the formwork frame, preventing lateral swaying of the frame under strong wind loads. It works in conjunction with the diagonal tie steel pipe to form a double constraint of lateral and diagonal forces. The horizontal tie steel pipe is made of Q235 material, with a diameter of 48 mm and a wall thickness of 3.0 mm, and an inner diameter of 42 mm. The length of a single second reinforcing member 230 is consistent with the lateral span of the support frame, which is 4.5 m in this embodiment. A horizontal tie steel pipe is installed every 1.8 m (the distance between the support frame uprights) in the direction perpendicular to the frame arrangement, i.e., the direction of the extension of the I-beams. The steel pipe is fixed to the vertical uprights of the formwork support frame by right-angle fasteners. The tightening torque of the fastener bolts is controlled between 40-65 N·m to ensure no relative slippage between the steel pipe and the upright. Horizontal tie steel pipes must be installed immediately after the support frame uprights have been erected to the corresponding step distance of 1.8m. During installation, ensure that the axis of the steel pipe is perpendicular to the axis of the upright, and that the horizontal height deviation of the same steel pipe is ≤5mm. This solution can effectively distribute horizontal wind loads, avoid concentrated stress on a single upright of the frame, and meet the horizontal stability requirements of high-rise formwork support frames.

[0028] The inclined fixing member 210 includes an inclined tie steel pipe, which is the core anti-overturning component. The connector 300 includes a <-shaped plain round steel bar, which is the key anchorage between the inclined tie steel pipe and the cantilevered I-beam. It is used to transfer the overturning moment on the suspended side of the frame and convert the moment into a tensile force on the cantilevered I-beam. The connector 300, together with the <-shaped steel bar, transfers the tensile force of the inclined steel pipe to the I-beam, forming a rigid anchorage node of inclined steel pipe-steel bar-I-beam, preventing the bottom end of the inclined steel pipe from slipping. The connector 300 uses HPB300 grade plain round steel bar with a diameter of 20mm and a yield strength of 300MPa. The steel bar is bent into a <-shape, with a straight section length of 150mm connecting to the inclined steel pipe and a hook section length of 80mm hooking the I-beam, ensuring that it can completely hook the upper flange of the I-beam. One end of the straight section of the reinforcing bar is fully welded to the bottom end of the inclined tie steel pipe using E43 welding rod, with a welding length ≥100mm, specifically 120mm; the hooked section of the reinforcing bar is directly hooked to the upper flange of the cantilevered I-beam, with a hooking depth ≥50mm, and is tightly fitted to the flange of the I-beam, without the need for drilling or welding on the I-beam.

[0029] Furthermore, a third reinforcing member 240 is fixedly provided below the angle between the inclined fixing member 210 and the second reinforcing member 230, and the second reinforcing member 230 and the third reinforcing member 240 form a longitudinal and transverse fixing structure.

[0030] To achieve the integration of the side fixing device, the third reinforcing member 240 is installed on the rear side of the cantilever support frame and is connected to the second reinforcing member 230, i.e., the horizontal tie steel pipe, in a longitudinal and transverse structure with the fixing device on both sides. It is fixed with all the second reinforcing members 230 and the diagonal fixing members to form a three-dimensional tie system. The specifications of the third reinforcing member 240 are the same as those of the horizontal tie steel pipe.

[0031] To achieve specific steel pipe connection and fixation, right-angle couplers and swivel couplers are also included. The vertical connection between the horizontal steel pipe and the upright is fixed by the right-angle coupler, and the connection between the inclined steel pipe and the upright or the horizontal section 110 at any angle is fastened by the swivel coupler. The swivel coupler and the right-angle coupler are existing technologies and will not be described in detail in this utility model.

[0032] To improve the protective strength, the vertical section 120 includes a first vertical section and a second vertical section. The first vertical section is higher than the second vertical section and the second roof 420. Multiple first vertical sections are arranged and installed on the outside of the cantilever support frame, that is, on the front side of the second roof 420. Multiple second vertical sections are arranged in parallel on the inside of the cantilever support frame, that is, below the second roof 420 and above the first reinforcing member 210. The oblique fixing member and the second reinforcing member are fixedly connected to one side of the second vertical section.

[0033] After the concrete pouring of the roof cantilever truss structure is completed and the concrete strength reaches 100% of the design strength, the components can be dismantled in the following order: integral reinforcement 250 → connector 300 + diagonal tie steel pipe combination → second reinforcement 230 → first reinforcement 220, after confirmation by testing with test blocks under the same conditions. All steel pipes, fasteners, and connectors 300, after cleaning and rust removal, can be used for subsequent construction of similar railway-top residential roof cantilever trusses. This high component reuse rate significantly reduces construction costs and meets green construction requirements.

[0034] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A cantilever support frame fixing device, the cantilever support frame comprising horizontal and vertical sections that are mutually connected, characterized in that, The fixing device is detachably installed on the suspended side of the cantilever support frame, and the fixing device includes: Inclined fastener: Installed obliquely on the side of the suspended support frame and fixedly connected to the vertical section; First reinforcing member: It is installed laterally on the side, with one side of the first reinforcing member suspended and the other side fixed. Connector: The connector includes a first end and a second end with a preset angle. The preset angle is set in correspondence with the inclined fixing member. The first end is fixedly connected to the inclined fixing member, and the second end is mounted on the first reinforcing member.

2. The cantilever support frame fixing device according to claim 1, characterized in that, A steel rope is provided on one side of the first reinforcing member. The cantilever support frame is used to install on the first roof and the second roof, which are distributed vertically. One end of the steel rope is fixed to the first roof, and the other end is tied to the outside of the first reinforcing member. The inside of the first reinforcing member is fixed to the second roof, forming a triangular suspension fixing structure.

3. The cantilever support frame fixing device according to claim 2, characterized in that, The outer side of one end of the connector connected to the inclined fixing member is provided with a full-welded structure along its axis. The full-welded structure is used to connect and fix the bottom end of the inclined fixing member. The length of the full-welded structure is 70-150mm.

4. The cantilever support frame fixing device according to claim 3, characterized in that, The first reinforcing member is an I-beam, and the inner side of the I-beam is provided with bolts for fixing to the second roof.

5. The cantilever support frame fixing device according to claim 3, characterized in that, A second reinforcing member is provided parallel to the first reinforcing member and fixedly connected above it. The second reinforcing member is fixedly connected to the vertical section, and a swivel fastener is provided on the second reinforcing member at the angle between the second reinforcing member and the inclined fixing member.

6. The cantilever support frame fixing device according to claim 5, characterized in that, The middle part of the inclined fastener is fixedly connected to the first position of the vertical section to form a first fixing point. The second reinforcing member is fixedly connected to the second position of the vertical section to form a second fixing point. The swivel fastener forms a third fixing point. The first fixing point, the second fixing point and the third fixing point form a right-angled triangle fixing structure.

7. A cantilever support frame fixing device according to claim 6, characterized in that, Right-angle fasteners are provided at the first and second fixing points to achieve a fixed connection with the vertical section.

8. A cantilever support frame fixing device according to any one of claims 5-7, characterized in that, A third reinforcing member is also fixed below the angle between the oblique fixing member and the second reinforcing member, and the second and third reinforcing members form a longitudinal and transverse fixing structure.

9. A cantilever support frame fixing device according to claim 1, characterized in that, The preset included angle is 30-60°.

10. A cantilever support frame fixing device according to claim 5, characterized in that, The vertical section includes a first vertical section and a second vertical section. The first vertical section is higher than the second vertical section. Multiple first vertical sections are arranged and installed on the outside of the cantilever support frame. Multiple second vertical sections are arranged in parallel on the inside of the cantilever support frame. The inclined fixing member and the second reinforcing member are fixedly connected to one side of the second vertical section.

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