Steel support system for stair step and platform

Abstract

The utility model belongs to the technical field of house building construction, and relates to a steel support system for stair steps and platforms, which comprises a stair platform steel support, a stair beam steel support and a stair step steel support. The side lower end of the stair beam steel support is connected with the lower part of the stair step steel support through a lower connecting rod rotating shaft; the upper end of the side face of the stair beam steel support at the high position is connected with the upper portion of the stair step steel support through an upper connecting rod rotating shaft. The lower end of the side face of the stair beam steel support is connected with the lower portion of the stair step steel support through a rotating shaft. The stair platform steel support, the stair beam steel support and the stair step steel support are arranged, reliable connection of all the components is achieved through fastening of the gusset plates and the bolts, the components are convenient and fast to install, the situation that a stair formwork support is repeatedly erected and dismantled in a limited construction space is avoided, and the supporting system can be recycled after being erected.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction, and relates to a steel support system for stair treads and platforms. Background Technique

[0002] The level of building construction technology has been significantly improved and developed in the past few decades, and it has been developing rapidly in the fields of super high-rise buildings, high-speed railways, highways, bridges, etc. However, traditional construction techniques are still widely used in building construction in China. Especially the commonly used formwork and scaffolding system has many problems such as non-standard erection, insufficient wall thickness of pipes, poor quality of fasteners, high labor demand, and low turnover efficiency. The building engineering industry in China is gradually transforming towards green, information-based and intelligent. Building steel molds, with their advantages of being firm, durable, light in weight, high in strength, good in design flexibility, high in turnover utilization rate, energy-saving and environmental protection, are increasingly applied to engineering practice.

[0003] Therefore, a support device with high installation efficiency, reliable operation and less labor demand is needed to solve the above technical problems. Content of the Utility Model

[0004] The technical solution adopted by the utility model to solve the technical problems is: a steel support system for stair treads and platforms, including: a stair landing steel support, a stair beam steel support, and a stair tread steel support. The stair landing steel support is used to support the landing of the precast stair from bottom to top. The stair tread steel support is used to support the stair treads of the precast stair from bottom to top. The stair beam steel support is used to support the stair cross beam of the precast stair from bottom to top, and the stair beam steel support is also used to butt-connect the stair landing steel support and the stair tread steel support;

[0005] The stair landing steel support is a square column formed by stacking and connecting a plurality of rectangular parallelepiped frame-shaped first support frames in the vertical direction; the connection methods between the first support frames include: welding, bolt connection; the stair tread steel support is a square beam formed by connecting the heads and tails of a plurality of rectangular parallelepiped frame-shaped second support frames in the horizontal direction; the connection methods between the second support frames include: welding, bolt connection; the stair beam steel support is in the shape of a rectangular parallelepiped frame;

[0006] One side of the stair landing steel support is detachably connected to one side of the stair beam steel support above the side wall, and the opposite side of the stair beam steel support is detachably connected to one end of the stair tread steel support;

[0007] The connection method of the steel support of the lower stair beam to the steel support of the stair tread is as follows: the upper end of the side surface of the steel support of the stair beam is rotationally connected to the upper part of the steel support of the stair tread through a rotating shaft, and the lower end of the side surface of the steel support of the stair beam is rotationally connected to the lower part of the steel support of the stair tread through a lower connecting rod rotating shaft; the connection method of the steel support of the upper stair beam to the steel support of the stair tread is as follows: the upper end of the side surface of the steel support of the stair beam is rotationally connected to the upper part of the steel support of the stair tread through an upper connecting rod rotating shaft, and the lower end of the side surface of the steel support of the stair beam is rotationally connected to the lower part of the steel support of the stair tread through a rotating shaft.

[0008] Preferably, a first steel formwork is provided on the top surface of the steel support of the stair landing; a second steel formwork is provided on the top surface of the steel support of the stair tread.

[0009] Preferably, the top surface of the steel support of the stair beam is lower than the top surface of the steel support of the connecting end stair tread, and a trough-shaped third steel formwork is provided at the top surface of the steel support of the stair beam.

[0010] Preferably, at least one of the first support frames of the steel support of the stair landing is height-adjustable, and at least one of the second support frames of the steel support of the stair tread is adjustable in length along the slope direction of the stair tread.

[0011] More preferably, the length of the second support frame is adjustable in the width direction of the stair tread.

[0012] Preferably, both the lower connecting rod and the upper connecting rod are rods with adjustable lengths, and the lower connecting rod and the upper connecting rod respectively include: a threaded telescopic rod, an electric telescopic rod, and a hydraulic telescopic rod.

[0013] Preferably, gusset plates are respectively provided at the joints at both ends of the lower connecting rod, at the joints at both ends of the upper connecting rod, and at the joints where the second support frames are butted. The gusset plates are connected to the joints of the lower connecting rod, the upper connecting rod, and the second support frame through bolts and nuts, and the hole positions of the through holes on the gusset plates are distributed in a triangular shape.

[0014] Preferably, the length of the column on the side of the steel support of the lower stair beam facing the steel support of the stair tread is greater than the height of the rectangular frame of the steel support of the stair beam, and the rotating shaft connection part of the steel support of the stair tread is located at the top end of the column extending out of the steel support of the stair beam.

[0015] The beneficial effects of the present utility model are as follows:

[0016] The present utility model is provided with a steel support for the stair landing, a steel support for the stair beam, and a steel support for the stair tread. Reliable connection of each component is achieved through gusset plates and bolts, and the installation between components is convenient. It avoids repeatedly erecting and dismantling the stair formwork support in a limited construction space, and the support system can be recycled after being erected, reducing the labor amount and carbon emissions on site, and achieving the construction goals of mechanization, lean production, and green production. Description of the Drawings

[0017] Figure 1 is a schematic structural view of a steel support system for stair treads and platforms of the present utility model;

[0018] Figure 2 is a schematic structural view of a standard section of a steel support for a stair landing of the present utility model;

[0019] Figure 3 is a schematic structural view of a steel support for a stair beam of the present utility model;

[0020] Figure 4 is a schematic structural view of a steel support for a stair tread of the present utility model;

[0021] Figure 5 is a schematic combined structural view of a steel support for a stair beam and a steel support for a stair tread of the present utility model.

[0022] In the figure, 1 is a steel support for a stair landing; 2 is a steel support for a stair beam; 3 is a steel support for a stair tread; 4 is a first support frame; 5 is a second support frame; 6 is a lower connecting rod; 7 is an upper connecting rod; 8 is a first steel formwork; 9 is a second steel formwork; 10 is a third steel formwork; 11 is a gusset plate; 12 is a column. Detailed implementation manners

[0023] Next, the related technologies in the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Refer to Figures 1 to 5 , the steel support system for stair treads and platforms in this implementation manner includes: a steel support 1 for a stair landing, a steel support 2 for a stair beam, and a steel support 3 for a stair tread. The steel support 1 for a stair landing is used to support the landing of the precast stair from bottom to top. The steel support 3 for a stair tread is used to support the stair tread of the precast stair from bottom to top. The steel support 2 for a stair beam is used to support the stair cross beam of the precast stair from bottom to top. The steel support 2 for a stair beam is also used to connect and dock the steel support 1 for a stair landing and the steel support 3 for a stair tread;

[0025] The steel support 1 for a stair landing is a square column formed by stacking and connecting a plurality of rectangular parallelepiped frame-shaped first support frames 4 in the vertical direction; the connection methods between the first support frames 4 include: welding and bolt connection;

[0026] The steel support 3 for a stair tread is a square beam formed by connecting the heads and tails of a plurality of rectangular parallelepiped frame-shaped second support frames 5 in the horizontal direction; the connection methods between the second support frames 5 include: welding and bolt connection;

[0027] The steel support 2 of the stair beam is in the shape of a cuboid frame;

[0028] One side wall of the steel support 1 of the stair landing is detachably connected to one side of the steel support 2 of the stair beam, and the opposite side of the steel support 2 of the stair beam is detachably connected to one end of the steel support 3 of the stair tread;

[0029] The way the steel support 2 of the stair beam at the lower level connects to the steel support 3 of the stair tread is as follows: the upper end of the side surface of the steel support 2 of the stair beam is rotationally connected to the upper part of the steel support 3 of the stair tread through a rotating shaft, and the lower end of the side surface of the steel support 2 of the stair beam is rotationally connected to the lower part of the steel support 3 of the stair tread through a lower connecting rod 6;

[0030] The way the steel support 2 of the stair beam at the higher level connects to the steel support 3 of the stair tread is as follows: the upper end of the side surface of the steel support 2 of the stair beam is rotationally connected to the upper part of the steel support 3 of the stair tread through an upper connecting rod 7, and the lower end of the side surface of the steel support 2 of the stair beam is rotationally connected to the lower part of the steel support 3 of the stair tread.

[0031] Furthermore, a first steel formwork 8 is provided on the top surface of the steel support 1 of the stair landing; a second steel formwork 9 is provided on the top surface of the steel support 3 of the stair tread; laying the steel formwork above the steel support system can facilitate the prefabrication of the stairs, or the formwork can be laid on the construction site after erecting the support system.

[0032] Furthermore, the top surface of the steel support 2 of the stair beam is lower than the top surface of the steel support 3 of the stair tread at the connection end, and a grooved third steel formwork 10 is provided at the top surface of the steel support 2 of the stair beam.

[0033] Furthermore, at least one of the first support frames 4 of the steel support 1 of the stair landing has an adjustable height, and at least one of the second support frames 5 of the steel support 3 of the stair tread has an adjustable length along the slope direction of the stair tread; the adjustable methods include using telescopic rods with adjustable lengths; at least one of the first support frames 4 and the second support frames 5 with adjustable lengths or heights, and the remaining first support frames 4 and second support frames 5 can adopt standard lengths. The standard lengths are easy to mass-produce, transport, and the first support frames 4 and second support frames 5 with adjustable lengths or heights enable the total height of the steel support 1 of the stair landing or the total length of the steel support 3 of the stair tread to be finely adjusted on-site according to the design requirements and on-site conditions to meet the needs of various different height and length dimensions. Therefore, the first support frames 4 and second support frames 5 with adjustable lengths can enhance the applicability of the steel support system of the stair tread and platform.

[0034] Even further, the length of the second support frame 5 along the width direction of the stair tread is adjustable; the adjustable methods include using rods with adjustable lengths or replacing them with various rods with different lengths; the second support frames 5 with different widths can meet the needs of different stair widths.

[0035] Further, both the lower connecting rod 6 and the upper connecting rod 7 are rods with adjustable lengths. The lower connecting rod 6 and the upper connecting rod 7 respectively include: a threaded telescopic rod, an electric telescopic rod, and a hydraulic telescopic rod. Adjusting the lengths of the connecting rods can adjust the angles of the steel support 2 of the stair beam and the steel support 3 of the stair tread.

[0036] Further, gusset plates 11 are respectively provided at the joints at both ends of the lower connecting rod 6, at the joints at both ends of the upper connecting rod 7, and at the joints where the second support frame 5 is butted. The gusset plates 11 connect the joints of the lower connecting rod 6, the upper connecting rod 7, and the second support frame 5 through bolts and nuts. The through-hole positions on the gusset plates 11 are distributed in a triangular shape; the triangularly distributed hole positions are equivalent to the function of the diagonal tension rib plates at the corners of the steel members, making it not easy for the first support frame 4 and the second support frame 5 to deform, and also making it not easy for the joints between the first support frame 4, the second support frame 5 and the connecting rods to deform.

[0037] Further, the length of the upright column 12 on the side of the steel support 2 of the stair beam facing the steel support 3 of the stair tread at the lower position is greater than the height of the cuboid frame of the steel support 2 of the stair beam. The rotating shaft connection of the steel support 3 of the stair tread is located at the top end of the upright column 12 extending out of the steel support 2 of the stair beam; the extended upright column 12 can enhance the connection strength at the joint between the steel support 2 of the stair beam and the steel support 3 of the stair tread.

[0038] Embodiment

[0039] The steel support system for stair treads and platforms in this embodiment includes a stair platform steel support 1, a stair beam steel support 2, a stair tread steel support 3, a lower stair platform, and steel formwork;

[0040] The stair platform steel support 1 is assembled by a number of standard sections of the stair platform steel support. Each standard section of the stair platform steel support is provided with upright columns at the four corners. The adjacent upright columns are welded and connected by two upper and lower cross beams. A number of bolt holes are evenly opened on each upright column and cross beam for horizontal and vertical connections with other components. Align the bolt holes between two adjacent standard sections of the stair platform steel support and tighten the bolts to achieve stable vertical connection.

[0041] During the actual installation of the steel support 2 of the stair beam, weld the gusset plates 11 on the cross beam. According to the number of components that each gusset plate 11 needs to connect, open 2 - 3 bolt holes on each gusset plate 11. The bolt hole positions are distributed in a triangular shape. Open bolt holes with the same diameter at the corresponding positions of the short cross bars and the vertical rods. Connect multiple short cross bars and vertical rods into a whole through bolts. Due to the asymmetry of the structures of the upper and lower stair beams, Figure 3 the lengths of the vertical rods of the steel support of one side of the stair beam are not completely the same.

[0042] When actually installing the steel support 3 for the stair treads, similar to the installation of the steel support 2 for the stair beams, the gusset plate 11 is welded to the cross beam. 3 to 4 bolt holes are drilled in each gusset plate 11, and bolt holes of the same diameter are drilled at the corresponding positions of the cross bar and the vertical bar. The cross beam, the cross bar and the vertical bar are connected by bolts to form a complete steel support framework for the stair treads.

[0043] After the steel support 2 for the stair beams and the steel support 3 for the stair treads are assembled, the two are stably connected by connecting rods. Finally, the steel supports 1 for the stair platforms at both ends are connected to complete the erection of the steel support system for the stair treads and platforms. After the stairs on this floor are built, loosen the bolts between the steel support 1 for the stair platform and the steel support 2 for the stair beams, and hoist each component of the steel support system for the stair treads and platforms to the upper floor. It can be used continuously after assembly.

[0044] It should be noted that in the steel support 3 for the stair treads, different moduli can be set for the cross beams to adapt to different stair widths, and the remaining members can be manufactured in a standardized manner. The cross beam in the steel support 2 for the stair beams can be set to the same modulus as the cross beam in the steel support 3 for the stair treads. The length of the short cross bar is changed to adapt to the widths of different stair beams. By changing the lengths of the vertical bars and the connecting rods, the angles of the steel support 2 for the stair beams and the steel support 3 for the stair treads can be adjusted to match the inclination angles of different stair sections, so as to realize the recycling of this support system in multiple projects.

[0045] All components of the present utility model are installed on the ground. The installation sequence is as follows: First, erect the steel supports 1 for the stair platforms at both ends. Secondly, splice the steel support 2 for the stair beams and the steel support 3 for the stair treads, and then connect them to the steel supports 1 for the stair platforms at both ends by bolts to form a steel support system for the stairs. After the steel support system is assembled, it is hoisted as a whole onto the lower stair platform, and finally steel formwork is laid above the steel support system.

[0046] By means of ground assembly and integral hoisting, the present utility model avoids multiple processes such as on-site erection of formwork support frames. The installation between components is convenient, the connection is reliable, and the installation accuracy is high. Moreover, this support system can be recycled, reducing the on-site labor consumption and carbon emissions, achieving the construction goals of mechanization, lean production and green construction, and having significant advantages compared with the traditional formwork support process.

[0047] In summary, the present utility model realizes reliable connection of each component through the setting of the steel support for the stair platform, the steel support for the stair beams and the steel support for the stair treads, and fastening by gusset plates and bolts. The installation between components is convenient, avoiding repeated erection and demolition of the stair formwork support in a limited construction space. Moreover, after the support system is erected, it can be recycled, reducing the on-site labor consumption and carbon emissions, achieving the construction goals of mechanization, lean production and green construction. Therefore, the present utility model has a wide application prospect.

[0048] It should be emphasized that the above are only the preferred embodiments of the present utility model, and there is no restriction on the present utility model in any form. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A steel support system for stair treads and platforms, characterized in that: include: Staircase platform steel support (1), staircase beam steel support (2), staircase step steel support (3), the staircase platform steel support (1) is used to support the rest platform of the staircase to be prefabricated from bottom to top, the staircase step steel support (3) is used to support the staircase steps of the staircase to be prefabricated from bottom to top, the staircase beam steel support (2) is used to support the staircase crossbeam of the staircase to be prefabricated from bottom to top, and the staircase beam steel support (2) is also used to butt-connect the staircase platform steel support (1) and the staircase step steel support (3); The staircase platform steel support (1) is in the shape of a square column formed by stacking and connecting a plurality of rectangular parallelepiped frame-shaped first support frames (4) in a vertical direction; the connection methods between the first support frames (4) include: welding and bolt connection; The stair tread steel support (3) is in the shape of a square beam formed by connecting a plurality of rectangular parallelepiped frame-shaped second support frames (5) end to end in a horizontal direction; the connection methods between the second support frames (5) include: welding and bolt connection; The staircase beam steel support (2) is in the shape of a rectangular frame; The upper side wall of the stair platform steel support (1) is detachably connected to one side of the stair beam steel support (2), and the other side of the stair beam steel support (2) is detachably connected to one end of the stair tread steel support (3); The staircase beam steel support (2) at the lower position is connected to the staircase step steel support (3) in the following manner: the upper end of the side of the staircase beam steel support (2) is connected to the upper part of the staircase step steel support (3) by a rotating shaft, and the lower end of the side of the staircase beam steel support (2) is connected to the lower part of the staircase step steel support (3) by a rotating shaft through a lower connecting rod (6); The staircase beam steel support (2) at a high position is connected to the stair tread steel support (3) in the following manner: the upper end of the side surface of the staircase beam steel support (2) is connected to the upper part of the stair tread steel support (3) via the rotating shaft of the upper connecting rod (7), and the lower end of the side surface of the staircase beam steel support (2) is connected to the lower part of the stair tread steel support (3) via the rotating shaft.

2. A steel support system for stair treads and platforms according to claim 1, characterized in that: A first steel formwork (8) is provided on the top surface of the stair platform steel support (1); and a second steel formwork (9) is provided on the top surface of the stair tread steel support (3).

3. A steel support system for stair treads and platforms according to claim 1, characterized in that: The top surface of the stair beam steel support (2) is lower than the top surface of the stair tread steel support (3) at the connection end, and a groove-shaped third steel formwork (10) is provided on the top surface of the stair beam steel support (2).

4. A steel support system for stair treads and platforms according to claim 1, characterized in that: At least one of the first support frames (4) of the stair platform steel support (1) is height-adjustable, and at least one of the second support frames (5) of the stair tread steel support (3) is length-adjustable in the direction of the slope of the stair tread.

5. A steel support system for stair treads and platforms according to claim 4, characterized in that: The length of the second support frame (5) along the width direction of the stair treads is adjustable.

6. A steel support system for stair treads and platforms according to claim 1, characterized in that: The lower connecting rod (6) and the upper connecting rod (7) are both length-adjustable rods, and the lower connecting rod (6) and the upper connecting rod (7) respectively comprise: a threaded telescopic rod, an electric telescopic rod, and a hydraulic telescopic rod.

7. A steel support system for stair treads and platforms according to claim 1, characterized in that: Node plates (11) are respectively provided at the nodes at both ends of the lower connecting rod (6), the nodes at both ends of the upper connecting rod (7), and the nodes where the second support frame (5) is connected. The node plates (11) are connected to the nodes of the lower connecting rod (6), the upper connecting rod (7), and the second support frame (5) through bolts and nuts. The through holes on the node plates (11) are distributed in a triangular shape.

8. A steel support system for stair treads and platforms according to claim 1, characterized in that: The length of the column (12) on the side of the lower stair beam steel support (2) facing the stair tread steel support (3) is greater than the height of the rectangular parallelepiped frame of the stair beam steel support (2), and the pivot connection of the stair tread steel support (3) is located at the top end of the column (12) extending out of the stair beam steel support (2).

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