CN214785474U - Assembled steel construction stair - Google Patents

Abstract

The application relates to the field of fabricated buildings, in particular to a fabricated steel structure stair. The key points of the technical scheme are as follows: comprises a base, a supporting frame, a plate beam and a pedal; the base is used for being placed on the ground, the support frame is positioned at the top of the base, and the support frame is detachably connected with the base; the two plate beams are positioned at the top of the support frame and detachably connected to the top of the support frame, the plate beams incline towards one side from bottom to top, and the two plate beams are parallel to each other and are opposite to each other; the footboard is a plurality of, the footboard is located two between the plate girder, the both sides of footboard can be dismantled respectively and connect in two on the plate girder, it is a plurality of the footboard along the length direction of plate girder certainly the one end of plate girder to the equidistant arrangement of the other end of plate girder, this application has the effect that promotes the holistic dismouting convenience of steel construction stair.

Description

Assembled steel construction stair

Technical Field

The application relates to the field of fabricated buildings, in particular to a fabricated steel structure stair.

Background

Nowadays, a prefabricated building is widely used, wherein the prefabricated building is a building which is assembled by being prefabricated in a factory and then being transported to a construction site, and the assembled building is generally composed of various prefabricated components, such as stairs, wall panels, balconies and the like. Among them, the fabricated stairway is an indispensable important component in high-rise fabricated buildings.

At present, the fabricated stairway mainly comprises two forms, wherein one form is the fabricated stairway formed by pouring concrete, and the concrete fabricated stairway is relatively heavy in volume and is relatively inconvenient to transport and install; another kind of assembled stair is steel construction assembled stair, and steel construction assembled stair cut off the steel section bar usually in order to form standard specification, hoists the steel section bar to the scene afterwards and carries out welded fastening in order to form stair, and the overall structure of steel construction assembled stair is lighter than in concrete assembled stair to the antidetonation function is better, and steel construction assembled stair have obtained wide application.

To the correlation technique among the above-mentioned, steel section bar need cut apart each part of dismantling the stair usually when recycle, and the whole dismouting convenience of steel construction stair is comparatively inconvenient.

SUMMERY OF THE UTILITY MODEL

In order to promote the holistic dismouting convenience of steel construction stair, this application provides an assembled steel construction stair.

The application provides a fabricated steel structure stair adopts following technical scheme:

an assembled steel structure stair comprises a base, a support frame, a plate girder and a pedal; the base is used for being placed on the ground, the support frame is positioned at the top of the base, and the support frame is detachably connected with the base; the two plate beams are positioned at the top of the support frame and detachably connected to the top of the support frame, the plate beams incline towards one side from bottom to top, and the two plate beams are parallel to each other and are opposite to each other; the pedal is a plurality of, the pedal is located two between the plate beam, the both sides of pedal can dismantle respectively connect in two on the plate beam, a plurality of the pedal along the length direction of plate beam from the one end of plate beam to the equidistant arrangement of the other end of plate beam.

By adopting the technical scheme, the base plays a role in supporting and installing the supporting frame, and the supporting frame is fixedly installed on the base in a detachable connection mode, so that the base and the supporting frame can be detached and installed; in addition, the support frame plays a role in supporting and installing the plate girder, and the plate girder is fixedly installed on the support frame in a detachable connection mode, so that the plate girder and the support frame can be detached and installed; in addition, the two plate beams play a role in supporting and installing the pedal, and the pedal is fixedly installed on the two plate beams in a detachable connection mode, so that the pedal and the plate beams can be detached and installed; at this moment, the pedestrian tramples on the footboard department, and pressure is transmitted to two plate girders from the footboard department, transmits to base department from plate girder department downwards immediately, and the structural design atress between each part of stair is firm to each part of stair can be dismouting each other, and the holistic dismouting convenience of stair is promoted.

Preferably, the support frame includes two backup pads, the backup pad sets up along vertical direction, and two backup pads are parallel to each other, be provided with two first locating grooves on the base, two the bottom of backup pad respectively with two the cooperation of pegging graft of first locating groove one-to-one, can dismantle on the base and be connected with first locking subassembly, first locking subassembly be used for with the backup pad closure is spacing in first locating groove.

Through adopting above-mentioned technical scheme, when installing the backup pad, can plug in the bottom of backup pad to first constant head tank, realize quick location between base and the backup pad this moment, install first locking subassembly immediately, can realize the mutual fixed connection between base and the support frame, the process is swift to, if demolish first locking subassembly, can realize dismantling two backup pads simultaneously, the convenient high efficiency of dismantlement process.

Preferably, the top of backup pad has from bottom to top and is the slope arris that the slope set up towards one side, the second constant head tank has been seted up to the bottom of plate beam, the plate beam via the second constant head tank lock extremely on the slope arris of backup pad, the backup pad with can dismantle between the plate beam and be connected with the second closure subassembly, the second closure subassembly be used for with the plate beam with backup pad looks fixed connection.

By adopting the technical scheme, when the plate beam is installed, the plate beam can be buckled and positioned on the inclined edge at the top of the supporting plate through the second positioning groove so as to realize quick positioning between the supporting plate and the plate beam, and meanwhile, the inclined edge of the supporting plate supports the plate beam in an inclined manner along the inclined direction, so that the plate beam can be placed in an inclined manner and is attached to the actual use working condition; after the plate beam is positioned, a second locking component is arranged between the supporting plate and the plate beam, the supporting plate and the plate beam can be fixed by the second locking component, so that the supporting plate and the plate beam are fixedly arranged, and the plate beam and the reinforcing rod 22 are stably connected.

Preferably, the two sides of the pedal are respectively provided with a positioning block, the plate beam is provided with a third positioning groove, the positioning blocks are in insertion fit with the third positioning grooves, and the two positioning blocks on the two sides of the pedal are respectively and correspondingly inserted into the third positioning grooves of the two plate beams.

Through adopting above-mentioned technical scheme, correspond the locating piece of footboard both sides respectively and peg graft in the third constant head tank of two board roof beams, at this moment, the third constant head tank can carry out the bearing to the locating piece, and then makes the footboard obtain fixed bearing, when carrying out fixed mounting to the footboard, only needs to plug two locating pieces to accomplish the installation of footboard in the third constant head tank of two board roof beams, and the simple operation is just quick.

Preferably, the first locking assembly comprises a first limiting block, a first limiting rod and a first nut, the first limiting block is fixedly connected to one end of the first limiting rod, the other end of the first limiting rod is provided with external threads, the first limiting rod penetrates through the base and the two supporting plates, the first nut is in threaded connection with the external threads of the first limiting rod, and the first nut and the first limiting block are respectively limited by the abutting of the base.

Through adopting above-mentioned technical scheme, the first gag lever post that runs through base and two backup pads can be spacing to two backup pads and base application motion for the backup pad can lock spacing in first locating groove, and then realizes fixed mounting, and first stopper and first nut can restrict first gag lever post and take off for base and backup pad pine, and more stable when making first limiting plate use, stability when first locking subassembly uses is promoted.

Preferably, the second locking assembly comprises a second limiting block, a second limiting rod and a second nut, the second limiting block is fixedly connected to one end of the second limiting rod, an external thread is arranged at the other end of the second limiting rod, the second limiting rod penetrates through the supporting plate and the plate beam, the second nut is in threaded connection with the external thread of the second limiting rod, and the second nut and the second limiting block are respectively limited by the plate beam in an abutting mode.

Through adopting above-mentioned technical scheme, the second gag lever post that runs through plate girder and backup pad can be spacing to backup pad and plate girder application motion for but the backup pad closure is spacing in the second constant head tank, and then realizes the fixed mounting of plate girder, and second stopper and second nut can restrict the second gag lever post and take off for plate girder and backup pad pine, and more stable when making the second limiting plate use, stability when second closure subassembly uses is promoted.

Preferably, the support frame further comprises a reinforcing rod, the reinforcing rod is arranged along the horizontal direction, and two ends of the reinforcing rod are respectively and fixedly connected to the two support plates.

Through adopting above-mentioned technical scheme, the stiffener plays and supports reinforced (rfd) effect to two backup pads, and the stiffener is related two backup pads atress in order to form three-dimensional support structure, and the structural strength of support frame obtains promoting.

Preferably, the reinforcing rods are multiple and are uniformly arranged between the two supporting plates.

Through adopting above-mentioned technical scheme, many stiffeners carry out the multiple spot between two backup pads and consolidate for the structural strength of support frame obtains further promotion, and the structure is practical.

In summary, the present application includes at least one of the following beneficial technical effects:

1. structural design among all parts of the stair is stressed firmly, all parts of the stair can be disassembled and assembled mutually, and the whole stair is convenient and fast to disassemble and assemble;

2. when the supporting plates are installed, the bottoms of the supporting plates can be inserted into the first positioning grooves, quick positioning is realized between the base and the supporting plates, the first locking assembly is installed immediately, mutual fixed connection between the base and the supporting frame can be realized, the process is quick, the first locking assembly is disassembled, the two supporting plates can be disassembled simultaneously, and the disassembling process is convenient and efficient;

3. the locating piece with the footboard both sides corresponds respectively and pegs graft in the third constant head tank of two board roof beams, and at this moment, the third constant head tank can carry out the bearing to the locating piece, and then makes the footboard obtain fixed bearing, when carrying out fixed mounting to the footboard, only needs to peg graft two locating pieces in the third constant head tank of two board roof beams, can accomplish the installation simple operation and the speed of footboard.

Drawings

Fig. 1 is a schematic structural view of the steel structure staircase of the present application.

Fig. 2 is a schematic structural view of the base and the supporting frame of the present application.

Fig. 3 is a schematic view of the assembly relationship of the base, the supporting frame and the first locking component.

FIG. 4 is a schematic view of the support plate, plate girder and second locking assembly of the present application in assembled relationship.

Fig. 5 is a cross-sectional view of the support plate and plate girder of the present application.

Fig. 6 is a schematic view showing the assembly relationship between the pedal and the plate girder according to the present invention.

Description of reference numerals: 1. a base; 11. a first positioning groove; 2. a support frame; 21. a support plate; 211. inclining the edge; 22. a reinforcing bar; 3. a plate girder; 31. a second positioning groove; 32. a third positioning groove; 4. a pedal; 41. positioning blocks; 5. a first locking assembly; 51. a first stopper; 52. a first limit rod; 53. a first nut; 6. a second locking assembly; 61. a second limiting block; 62. a second limiting rod; 63. a second nut.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses assembled steel construction stair. Referring to fig. 1, the staircase includes a base 1, a support frame 2, a plate girder 3, and a tread 4; the support frame 2 is arranged at the top of the base 1, and the base 1 supports the support frame 2; the plate beam 3 is arranged at the top of the support frame 2, and the support frame 2 supports the plate beam 3; footboard 4 is installed on board roof beam 3, and board roof beam 3 supports footboard 4, and footboard 4 is used for supplying the pedestrian to trample, and the pressure of pedestrian transmits 3 departments of board roof beam from footboard 4, and pressure transmits 2 departments of support frame from 3 departments of board roof beam immediately, and support frame 2 is with pressure dispersion to base 1 on, realizes stabilizing the bearing to the pedestrian, and the structure atress is reasonable.

Referring to fig. 2, to support the supporting frame 2, specifically, in this embodiment, the base 1 is disposed in a plate shape, the base 1 is placed on the ground along a horizontal direction when in use, and the ground supports the base 1; in addition, in order to improve the stability of the base 1 during installation, the base 1 and the ground can be reinforced and installed through expansion screws or fasteners such as anchor rods. The top of base 1 is sunken from outside to inside to be provided with first constant head tank 11, and first constant head tank 11 is used for supplying 2 location installations of support frame.

Specifically, the support frame 2 includes a reinforcing rod 22 and two support plates 21, wherein in the present embodiment, the support plates 21 are arranged in a vertical direction, and the two support plates 21 are parallel to each other. The two supporting plates 21 can be formed by obliquely cutting the middle of a rectangular plate, at the moment, the supporting plates 21 comprise four sequentially connected side edges on the periphery, the outer edge of three sequentially connected side edges is shaped like 21274, the side edge of the rest side edge is arranged in an inclined shape, and the inclined side edge on the supporting plate 21 is defined as an inclined edge 211. The backup pad 21 sets up along vertical direction when the installation, and slope arris 211 is located the top of backup pad 21 this moment, and slope arris 211 is the slope setting towards one side from last, and the bottom of backup pad 21 is pegged graft in first constant head tank 11, and the surface of backup pad 21 and the cell wall looks butt laminating of first constant head tank 11, and mutual location concatenation is realized here to backup pad 21 and base 1. It should be noted that the number of the first positioning grooves 11 is two, the two first positioning grooves 11 are parallel to each other, the two support plates 21 are respectively inserted into the two first positioning grooves 11 in a one-to-one correspondence manner, at this time, the bottoms of the two support plates 21 are respectively inserted into the two first positioning grooves 11 in a one-to-one correspondence manner to be matched, so that the rapid positioning is realized, and the two support plates 21 at this time are parallel to each other.

In addition, the reinforcing rod 22 is arranged in a square rod shape in the embodiment, the reinforcing rod 22 is arranged along the horizontal direction, the reinforcing rod 22 is positioned between the two supporting plates 21, and two ends of the reinforcing rod 22 are respectively abutted with the mutually opposite side walls of the two supporting plates 21; meanwhile, a screw is arranged between the reinforcing rod 22 and the support plate 21, a through hole is arranged on the support plate 21 in a penetrating manner along the horizontal direction, a threaded blind hole is formed in the end face of the reinforcing rod 22, the screw penetrates through the support plate 21 through the through hole, the screw is connected in the threaded blind hole in the end face of the reinforcing rod 22 in a threaded manner, and at the moment, the end part of the reinforcing rod 22 is fixedly connected to the support plate 21; here, both ends of the reinforcing rod 22 are respectively fixedly connected to the two supporting plates 21, the reinforcing rod 22 plays a role in supporting and reinforcing the two supporting plates 21, the reinforcing rod 22 connects the two supporting plates 21 to form a three-dimensional support structure in a stressed manner, and the support frame 2 is firm in structure.

Further, the number of the reinforcing rods 22 can be multiple, for example, three, four, or five, and in this embodiment, the number of the reinforcing rods 22 is three for example, and the three reinforcing rods 22 are uniformly arranged between the two supporting plates 21, at this time, the multiple reinforcing rods 22 play a role in reinforcing the space between the two supporting plates 21 at multiple points, and the overall structural strength of the supporting frame 2 is further improved.

Referring to fig. 3, in order to improve the installation stability between the support frame 2 and the base 1, a first locking component 5 is detachably connected to the base 1, and the first locking component 5 is used for locking and limiting the support plate 21 in the first positioning groove 11, so as to realize the mutual fixed installation between the support plate 21 and the base 1.

Specifically, first locking subassembly 5 includes first stopper 51, first gag lever post 52 and first nut 53, and in this embodiment, first gag lever post 52 is the shaft-like setting of circle, and the external screw thread has been seted up to the global department of one end of first gag lever post 52, and first stopper 51 is through welded fastening's mode fixed mounting in the one end that external screw thread was kept away from to first gag lever post 52.

Two first via holes are arranged on the base 1 in a penetrating mode along the horizontal direction, the first via holes sequentially penetrate through the two first positioning grooves 11, second via holes are arranged on the supporting plate 21 in a penetrating mode, when the supporting plate 21 is inserted into the first positioning grooves 11, the first via holes are communicated with the second via holes, at the moment, the first limiting rod 52 is sequentially inserted into the first via holes and the second via holes, the first limiting rod 52 can penetrate through the base 1 and the two supporting plates 21, at the moment, the first limiting rod 52 is used for limiting the supporting plate 21 in the first positioning grooves 11 in a locking mode, and the supporting plate 21 and the base 1 are fixedly installed at the moment.

Subsequently, the first nut 53 is in threaded connection with the external thread of the first limiting rod 52, the first nut 53 is screwed, the first nut 53 and the first limiting block 51 are respectively limited by the two opposite sides of the base 1 in a butting manner, the first locking component 5 is fixedly installed, the first limiting rod 52 is not easy to loosen and loosen the base 1 and the supporting plate 21, and the installation structure is stable. In addition, if the first nut 53 is unscrewed to the outside of the first limiting rod 52, and the first limiting rod 52 is pulled away from the base 1 and the supporting plate 21, the mutual detachment between the base 1 and the supporting plate 21 can be realized, the detachable connection between the supporting frame 2 and the base 1 is realized, and the operation is simple, convenient and rapid. It should be noted that the specific number of the first locking components 5 can be multiple sets, such as three sets, four sets, or five sets, and the specific number of the first locking components 5 is not limited herein.

Referring to fig. 4 and 5, the top of the support plate 21 supports the plate girder 3, the plate girders 3 are two, the two plate girders 3 are respectively located on the top of the two support plates 21, in this embodiment, the plate girder 3 is disposed in a square bar shape, the length direction of the plate girder 3 is consistent with the inclination direction of the inclined edge 211 at the top of the supporting plate 21, the bottom of the plate girder 3 is provided with a second positioning groove 31, more specifically, the bottom of the plate girder 3 is provided with a second positioning groove 31 recessed from the outside to the inside, the plate girder 3 is fastened to the inclined edge 211 of the supporting plate 21 through the second positioning groove 31, at this time, the top of the supporting plate 21 is inserted into the second positioning groove 31, and the groove wall of the second positioning groove 31 is abutted with the surface of the support plate 21, the plate beam 3 and the support plate 21 are positioned with each other, the plate girders 3 are inclined from bottom to top to one side, and the two plate girders 3 are parallel to each other and face each other.

In addition, in order to improve the connection stability between the plate girder 3 and the support plate 21, a second locking assembly 6 is detachably connected between the support plate 21 and the plate girder 3, and the second locking assembly 6 is used for fixedly connecting the plate girder 3 and the support plate 21. Specifically, the second locking assembly 6 includes a second limiting block 61, a second limiting rod 62 and a second nut 63, wherein the second limiting rod 62 is in a round rod shape, the second limiting block 61 is fixedly mounted at one end of the second limiting rod 62 in a welding and fixing manner, and an external thread is arranged at the other end of the second limiting rod 62.

A third through hole penetrates through the plate beam 3 in the horizontal direction, the middle of the third through hole is communicated with the second positioning groove 31, a fourth through hole penetrates through the top of the supporting plate 21 in the horizontal direction, when the top of the supporting plate 21 is inserted into the second positioning groove 31, the third through hole is communicated with the fourth through hole, at the moment, the second limiting rod 62 penetrates through the third through hole and the fourth through hole, the second limiting rod 62 penetrates through the supporting plate 21 and the plate beam 3, the second limiting rod 62 locks and limits the supporting plate 21 into the second positioning groove 31, and the plate beam 3 and the supporting plate 21 are locked and fixed with each other; then, the second nut 63 may be screwed onto the external thread of the second limiting rod 62, and the second nut 63 is screwed, so that the second nut 63 and the second limiting block 61 are respectively abutted against and limited by two opposite sides of the plate beam 3. At this time, the second limit rod 62 is not easily loosened to the outside of the support plate 21 and the plate girder 3, and the mounting structure is stable.

If the second nut 63 is screwed off to the outside of the second limiting rod 62, and the second limiting rod 62 is pulled away from the support plate 21 and the plate beam 3, the plate beam 3 and the support plate 21 can be detached from each other, and the plate beam 3 and the support plate 21 can be detachably connected. It should be noted that the specific number of the second locking assemblies 6 may be multiple sets, the specific number of the second locking assemblies 6 may be three, four or five sets, etc., the multiple sets of the second locking assemblies 6 may be arranged at intervals along the length direction of the plate beam 3, the multiple sets of the second locking assemblies 6 may reinforce the plate beam 3 and the support plate 21 at multiple points, the specific number of the second locking assemblies 6 may be correspondingly arranged according to actual needs, and the specific number of the second locking assemblies 6 is not limited herein.

Referring to fig. 6, the surfaces of the opposite sides of the two plate beams 3 are recessed from outside to inside to form third positioning grooves 32, the third positioning grooves 32 of the two plate beams 3 are located at the same horizontal height, and the third positioning grooves 32 are used for installing the pedal 4. Specifically, the pedal 4 is provided as a rectangular plate in this embodiment, and the positioning blocks 41 are respectively provided on both sides of the pedal 4, in this embodiment, the positioning blocks 41 are provided as rectangular blocks, and the positioning blocks 41 are mounted on the pedal 4 by welding; two locating pieces 41 that are located the footboard 4 both sides correspond respectively and peg graft and cooperate in the third constant head tank 32 of two board roof beams 3, when locating piece 41 pegs graft in third constant head tank 32, the surface of locating piece 41 and the cell wall looks laminating butt of third constant head tank 32, and at this moment, board roof beam 3 carries out the bearing through locating piece 41 to footboard 4 fixed, and footboard 4 can bear the pedestrian this moment. In addition, the positioning block 41 is pulled out from the third positioning groove 32, so that the pedal 4 and the plate beams 3 can be detached from each other, and at the moment, two sides of the pedal 4 are detachably connected to the two plate beams 3 respectively, so that the operation is simple and easy.

Further, a plurality of the treads 4 may be provided, such as twenty, thirty, or forty, and the like, and the plurality of treads 4 are arranged at equal intervals from one end of the plate girder 3 to the other end of the plate girder 3 along the length direction of the plate girder 3 to form a stair structure; correspondingly, the number of the third positioning grooves 32 and the number of the positioning blocks 41 arranged on the two plate beams 3 are matched with the number of the pedals 4, the specific number of the pedals 4 can be correspondingly arranged according to actual needs, and the specific number of the pedals 4 is not limited herein.

The implementation principle of the assembled steel structure stair of the embodiment of the application is as follows: the mutual inserting and positioning between the supporting plate 21 and the base 1 are realized through the first positioning groove 11, the detachable connection between the supporting plate 21 and the base 1 can be realized through the first locking component 5 arranged between the supporting plate 21 and the base 1, and the process is convenient and fast.

In addition, through the mutual grafting cooperation between second constant head tank 31 and the slab beam 3, realize the installation location of slab beam 3, install second closure subassembly 6 between slab beam 3 and backup pad 21 afterwards, can realize the dismantlement between backup pad 21 and the slab beam 3 and be connected, process convenient and fast.

In addition, through the mutual inserting and matching between the positioning block 41 and the third positioning groove 32, the pedal 4 and the plate beam 3 can be quickly spliced and positioned, meanwhile, the pedal 4 and the plate beam 3 are fixedly mounted with each other, and the process is convenient and quick.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides an assembled steel construction stair which characterized in that: comprises a base (1), a supporting frame (2), a plate beam (3) and a pedal (4);

the base (1) is used for being placed on the ground, the support frame (2) is positioned at the top of the base (1), and the support frame (2) is detachably connected with the base (1);

the number of the plate beams (3) is two, the plate beams (3) are positioned at the top of the support frame (2), the plate beams (3) are detachably connected to the top of the support frame (2), the plate beams (3) incline towards one side from bottom to top, and the two plate beams (3) are parallel to each other and are opposite to each other;

the pedal (4) is multiple, the pedal (4) is located between the two plate beams (3), the two sides of the pedal (4) are detachably connected to the two plate beams (3) respectively, and the pedals (4) are arranged at equal intervals along the length direction of the plate beams (3) from one end of the plate beam (3) to the other end of the plate beam (3).

2. The assembled steel structure staircase of claim 1, wherein: support frame (2) include two backup pads (21), backup pad (21) set up along vertical direction, and two backup pads (21) are parallel to each other, be provided with two first constant head tank (11) on base (1), two the bottom of backup pad (21) respectively with two first constant head tank (11) one-to-one is pegged graft the cooperation, base (1) is gone up and to be dismantled and is connected with first locking subassembly (5), first locking subassembly (5) are used for with backup pad (21) closure is spacing in first constant head tank (11).

3. The assembled steel structure staircase of claim 2, wherein: the top of backup pad (21) has slope arris (211) that is the slope setting from bottom to top towards one side, second constant head tank (31) have been seted up to the bottom of plate beam (3), plate beam (3) via second constant head tank (31) lock extremely on slope arris (211) of backup pad (21), backup pad (21) with can dismantle between plate beam (3) and be connected with second closure subassembly (6), second closure subassembly (6) be used for with plate beam (3) with backup pad (21) looks fixed connection.

4. The assembled steel structure staircase of claim 1, wherein: positioning blocks (41) are respectively arranged on two sides of the pedal (4), a third positioning groove (32) is formed in the plate beam (3), the positioning blocks (41) are in plug-in fit with the third positioning grooves (32), and the two positioning blocks (41) on the two sides of the pedal (4) are correspondingly plugged in the third positioning grooves (32) of the two plate beams (3) respectively.

5. The assembled steel structure staircase of claim 2, wherein: first locking subassembly (5) include first stopper (51), first gag lever post (52) and first nut (53), first stopper (51) fixed connection in the one end of first gag lever post (52), the other end of first gag lever post (52) is provided with the external screw thread, first gag lever post (52) run through base (1) and two backup pad (21), first nut (53) threaded connection in on the external screw thread of first gag lever post (52), first nut (53) and first stopper (51) respectively with base (1) butt is spacing.

6. An assembled steel structure stair according to claim 3, wherein: the second locking assembly (6) comprises a second limiting block (61), a second limiting rod (62) and a second nut (63), the second limiting block (61) is fixedly connected to one end of the second limiting rod (62), an external thread is arranged at the other end of the second limiting rod (62), the second limiting rod (62) penetrates through the supporting plate (21) and the plate beam (3), the second nut (63) is in threaded connection with the external thread of the second limiting rod (62), and the second nut (63) and the second limiting block (61) are respectively in limit contact with the plate beam (3).

7. The assembled steel structure staircase of claim 2, wherein: the support frame (2) further comprises reinforcing rods (22), the reinforcing rods (22) are arranged in the horizontal direction, and two ends of each reinforcing rod (22) are fixedly connected to the two support plates (21) respectively.

8. The assembled steel structure staircase of claim 7, wherein: the reinforcing rods (22) are multiple, and the reinforcing rods (22) are uniformly arranged between the two supporting plates (21).

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