A separate micro-convertible top support

Abstract

The utility model discloses a detachable formula can micro transfer support, including the horizontal setting top plate and being located below and vertical setting bracing piece, and the top of bracing piece horizontal setting has end plate, and the vertical bracing piece is equipped with the pressure square pipe on the end plate top surface, the bottom side of top plate is equipped with two mutually parallel and interval stiffened plates, the pressure square pipe inserts the interval between two stiffened plates, and through a pin shaft that penetrates stiffened plate and pressure square pipe and stiffened plate hinged, wherein, the bottom side of stiffened plate has a horizontal end, and the horizontal end has first gap between end plate, and the top surface of pressure square pipe has second gap between top plate, and first gap is less than second gap. The utility model can be adaptive keel horizontal corner, eliminate eccentric bending moment, and compatible wide distance double keel arrangement.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a detachable micro-rotatable top support. Background Technology

[0002] Traditional U-shaped top supports are welded together from three parts: a top plate, a threaded rod, and an adjusting nut. Height adjustment is only possible via the adjusting nut. The top plate and threaded rod are fixed together, failing to release the bending moment caused by load eccentricity. When the load is uneven at both ends of the top plate, the top plate directly transfers the bending moment to the threaded rod, transforming it from an axial compression member to a compression-bending member, significantly reducing its stable load-bearing capacity. During temporary on-site support erection, the bottom formwork connectors of the steel truss floor slab are almost impossible to align with the joists. When the joists deviate from the connectors, stress concentration occurs in the bottom formwork, drastically reducing the designed unsupported span. Furthermore, traditional top supports are short and cannot accommodate "inner-outer wide-spacing double joists" combinations. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is: a detachable micro-rotatable top support, which solves the problems of the prior art that can only adjust the height, cannot release the eccentric bending moment, and has poor adaptability.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A detachable, micro-rotatable top support includes a horizontally arranged top plate and a vertically arranged support rod located below it. An end plate is horizontally arranged at the top of the support rod, and a pressure-bearing square tube is vertically arranged on the top surface of the end plate opposite the support rod. Two parallel and spaced stiffening plates are arranged on the lower side of the top plate. The pressure-bearing square tube is inserted into the gap between the two stiffening plates and is hinged to the stiffening plates by a pin that passes through the stiffening plates and the pressure-bearing square tube. The lower side of the stiffening plate has a horizontal end, and there is a first gap between the horizontal end and the end plate. There is a second gap between the top surface of the pressure-bearing square tube and the top plate, and the first gap is smaller than the second gap.

[0005] As an optimization, the two ends of the top plate are bent vertically upward to form side plates, and two limiting baffles parallel to the side plates are provided vertically on the upper side of the top plate, with a gap between the two limiting baffles and between the limiting baffles and the side plates.

[0006] As an optimization, the stiffening plate is in the shape of an isosceles trapezoid, with the length of its upper base being greater than the length of its lower base. The lower base forms the horizontal end, and its length is less than the dimension of the end plate in the corresponding direction.

[0007] As an optimization, the support rod is a lead screw, and an adjusting nut is threaded onto the support rod, with an annular bearing surface on the lower end face of the adjusting nut.

[0008] As an optimization, the strut is a hollow tube structure, and its outer diameter matches the external dimensions of the pressure-bearing square tube.

[0009] Compared with the prior art, this application has the following advantages: 1. Zero moment transfer: The top plate and the strut are hinged, and the bending moment is absorbed by the pin gap, making the stable bearing capacity of the top support higher than that of the integral top support of the same specification.

[0010] 2. Adaptive micro-angle rotation: The double-gap design with the first gap being less than the second gap, automatic limit, and the rotation angle range is slightly larger than the maximum deflection angle of the prefabricated floor slab, suitable for horizontal floor slabs and inclined slabs with small slopes.

[0011] 3. Wide-spacing double keel compatibility: U-shaped top plate + limiting baffle can quickly form two types of wide-spacing keels, namely "inner double keel" and "outer double keel". The floor deck connectors do not need to be aligned, which can reduce the peak stress of the bottom formwork and improve the actual unsupported span of the floor deck.

[0012] 4. The installation steps are the same as those of traditional top supports. No additional training is required for on-site workers. The structure is simple and easy to process. No fine processing is required. It can be used with existing uprights. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the main structure of this utility model; Figure 3 This is a top view of the support effect of wide-spacing double keel in the actual application of this utility model; In the figure, the top plate is 1, the strut is 2, the end plate is 3, the pressure-bearing square tube is 4, the stiffening plate is 5, the pin is 6, the horizontal end is 7, the first gap is 8, the second gap is 9, the side plate is 10, the limiting baffle is 11, and the adjusting nut is 12. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings.

[0015] For specific implementation: see: Figures 1-2 , An embodiment of a detachable, micro-rotatable top support includes a horizontally arranged top plate 1 and a vertically arranged support rod 2 located below it. The top plate 1 has its two ends bent vertically upwards to form side plates 10, giving it an overall U-shaped structure. Two limiting baffles 11, parallel to the side plates 10, are vertically arranged on the upper side of the top plate 1, with gaps between the two limiting baffles 11 and between the limiting baffles 11 and the side plates 10. These gaps support the wide-spacing double keels and limit their movement. An end plate 3 is horizontally arranged at the top of the support rod 2. A pressure-bearing square tube 4 is vertically arranged on the top surface of the end plate 3, directly opposite the support rod 2. In this embodiment, the support rod 2 is a hollow tube structure, and its outer diameter is approximately the same as the outer dimensions of the pressure-bearing square tube 4. The top plate 1 has two parallel and spaced stiffening plates 5 on its lower side. The pressure-bearing square tube 4 is inserted into the gap between the two stiffening plates 5 and is hinged to the stiffening plates 5 by a pin 6 that passes through both the stiffening plates 5 and the pressure-bearing square tube 4. The outer dimensions of the pressure-bearing square tube 4 are slightly smaller than the gap between the two stiffening plates 5 to ensure assembly clearance. The lower side of the stiffening plate 5 has a horizontal end 7, which has a first gap 8 between it and the end plate 3. The top end of the pressure-bearing square tube 4 has a second gap 9 between it and the top plate 1. The first gap 8 is smaller than the second gap 9, so that the rotation angle of the top plate 1 is limited to a small angle (when the horizontal end 7 contacts the top surface of the end plate 3). This angle is slightly larger than the rotation angle caused by the typical maximum deflection of the floor slab.

[0016] Specifically, the stiffening plate 5 is an isosceles trapezoid with an upper base longer than the lower base. The lower base forms the horizontal end 7, and its length is less than the dimension of the end plate 3 in the corresponding direction. The support rod 2 is a lead screw, and an adjusting nut 12 is threaded onto the support rod 2. The lower end face of the adjusting nut 12 has an annular bearing surface for contacting the top of the upright and transmitting axial force.

[0017] The stress path of this scheme is as follows: floor slab load → keel → top slab → stiffening plate → pin → bearing square tube → end plate → strut → adjusting nut → upright (axial compression, no bending moment).

[0018] Therefore, the separate structure of the top plate and the struts in this design, with the two connected by a pin and a limiting gap, allows the top plate to rotate slightly around the pin (slightly larger than the maximum deflection angle of the floor slab), thereby completely releasing the bending moment and ensuring that the struts and uprights are always under axial compression. At the same time, the extended top plate with a limiting baffle can support the wide-spacing double keel, significantly reducing the stress on the bottom formwork and making the actual unsupported span of the floor deck close to the design value.

[0019] In summary, compared with existing technologies, this solution has the following advantages: 1. Zero moment transfer: The top plate and the strut are hinged, and the bending moment is absorbed by the pin gap, making the stable bearing capacity of the top support higher than that of the integral top support of the same specification.

[0020] 2. Adaptive micro-angle rotation: The double-gap design with the first gap being less than the second gap, automatic limit, and the rotation angle range is slightly larger than the maximum deflection angle of the prefabricated floor slab, suitable for horizontal floor slabs and inclined slabs with small slopes.

[0021] 3. Wide-spacing double keel compatibility: U-shaped top plate + limiting baffle can quickly form two types of wide-spacing keels, namely "inner double keel" and "outer double keel". The floor deck connectors do not need to be aligned, which can reduce the peak stress of the bottom formwork and improve the actual unsupported span of the floor deck.

[0022] 4. The installation steps are the same as those of traditional top supports. No additional training is required for on-site workers. The structure is simple and easy to process. No fine processing is required. It can be used with existing uprights.

[0023] Although embodiments of the present invention have been shown and described, those skilled in the art can make various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and basis of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. Therefore, the embodiments of the present invention are merely illustrative examples and do not constitute a limitation on the present invention in any way.

Claims

1. A detachable, micro-rotatable top support, characterized in that: The device includes a horizontally positioned top plate and a vertically positioned support rod below it. A horizontally positioned end plate is attached to the top of the support rod, and a pressure-bearing square tube is vertically positioned on the top surface of the end plate opposite the support rod. Two parallel and spaced stiffening plates are positioned on the lower side of the top plate. The pressure-bearing square tube is inserted into the gap between the two stiffening plates and is hinged to the stiffening plates via a pin that passes through both the stiffening plates and the pressure-bearing square tube. The lower side of each stiffening plate has a horizontal end with a first gap between this horizontal end and the end plate, and a second gap between the top surface of the pressure-bearing square tube and the top plate, wherein the first gap is smaller than the second gap.

2. The detachable micro-rotatable top support according to claim 1, characterized in that, The top plate is bent vertically upward at both ends to form side plates, and two limiting baffles parallel to the side plates are provided vertically on the upper side of the top plate, with a gap between the two limiting baffles and between the limiting baffles and the side plates.

3. The detachable micro-rotatable top support according to claim 1, characterized in that, The stiffening plate is in the shape of an isosceles trapezoid, with the length of its upper base being greater than the length of its lower base. The lower base forms the horizontal end, and its length is less than the dimension of the end plate in the corresponding direction.

4. A detachable micro-rotatable top support according to claim 1, characterized in that, The support rod is a lead screw, and an adjusting nut is threaded onto the support rod, with an annular bearing surface on the lower end face of the adjusting nut.

5. A detachable micro-rotatable top support according to claim 1, characterized in that, The support rod is a hollow tube structure, and its outer diameter matches the external dimensions of the pressure-bearing square tube.

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