Steel and plate combined assembly type stair

Abstract

The application provides a steel and plate combined assembly type stair, which comprises two stair beams, a plurality of step folding pieces, a plurality of step plates, a plurality of skirting boards and a plurality of steel mesh sheets; wherein the two stair beams are arranged in parallel, a plurality of step folding pieces are arranged in a stepped manner at equal intervals between the two stair beams, and a step plate is arranged between two adjacent step folding pieces; the surface of the step plate is paved with a steel mesh sheet; and a skirting board is arranged between two adjacent step plates in an upper and lower mode. The steel and plate combined assembly type stair is light in weight, convenient to install, and has good economy because some parts are prefabricated in a factory and some step plates are installed or poured on site.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building, in particular to a steel and plate combined assembly type stair. BACKGROUND

[0002] With the continuous promotion of building assembly requirements in China, PC assembly type stairs are widely used, but there are problems of large self-weight, high difficulty in transportation and hoisting, and poor economy; the prefabricated stairs of all steel also have problems of high transportation difficulty and large comprehensive cost. SUMMARY

[0003] The purpose of the present application is to provide a steel and plate combined assembly type stair, which is light in weight, convenient to install, and has good economy, with some parts prefabricated in the factory and some step plates installed or poured on site.

[0004] To achieve the above purpose, the present application provides a steel and plate combined assembly type stair, which comprises two ladder beams, a plurality of step folding pieces, a plurality of step plates, a plurality of skirting boards and a plurality of steel mesh sheets.

[0005] Among them, the two ladder beams are arranged in parallel, a plurality of step folding pieces are arranged in a stepped manner at equal intervals between the two ladder beams, and the step plates are arranged between the adjacent two step folding pieces; the surface of the step plate is paved with the steel mesh sheet; the skirting board is arranged between the two adjacent step plates.

[0006] Preferably, the ladder beam is integrally cast and pressed into a channel steel or H-shaped steel; the ladder beam comprises a horizontal part and an inclined part; the surface of the horizontal part is used for paving the rest platform plate, and the inclined part is used for setting up the ladder;

[0007] A plurality of connecting pieces are pre-provided on the upper flange or web of the horizontal part; the rest platform plate is arranged between the horizontal parts of the two ladder beams; and the rest platform plate is fixedly connected with the connecting pieces on both sides by bolts or welding, so that the rest platform plate is arranged on the upper flange of the horizontal part or fixedly connected with the web of the horizontal part;

[0008] A plurality of connecting pieces are pre-provided on the upper flange or web of the inclined part; the step folding piece is fixedly connected with the connecting pieces on both sides by bolts or welding, so that the step folding piece is arranged on the upper flange of the inclined part or fixedly connected with the web of the inclined part.

[0009] Preferably, a plurality of profile load-bearing secondary beams are arranged below the rest platform plate and between the two ladder beams.

[0010] Preferably, the rest platform plate and the step plate are both fiber cement boards.

[0011] Preferably, the ladder beam is a flanged ladder beam or a rolled edge ladder beam, which comprises a connecting web and a metal flange or a metal edge; the connecting web is provided with a connecting piece or a plug hole to realize the fixed connection of the web and the step fold; the upper and lower ends of the connecting web are connected with the metal flange or the metal edge as flanges, the flanges are designed in a transversely folded "L" shape or a "U" shape, and the flange edges can be attached to the wall body.

[0012] Preferably, the step fold is a prefabricated steel structure fold, which comprises a first horizontal part, a vertical part and a second horizontal part; the first horizontal part is connected perpendicularly with one end of the vertical part, and the second horizontal part is connected perpendicularly with the other end of the vertical part.

[0013] The second horizontal part of the upper step fold is parallel to and located in the same horizontal plane as the first horizontal part of the lower step fold between the two upper and lower adjacent step folds; the step plate is arranged between the first horizontal part and the second horizontal part in the same horizontal plane and is fixedly connected with the first horizontal part and the second horizontal part through self-tapping nails.

[0014] Preferably, the kick plate is arranged in the vertical part of the step fold and is fixedly connected with the vertical part through self-tapping nails.

[0015] Preferably, the lower end surface of the kick plate abuts against the upper surface of the lower step plate, and the upper end surface of the kick plate extends out of the upper surface of the upper step plate by a certain height, so as to form a "step groove" for placing a steel mesh and pouring concrete together with the step plate, the two side ladder beams and the upper kick plate.

[0016] Preferably, before the steel mesh is placed on the surface of the step plate, an anti-skid strip is placed on the surface of the step plate.

[0017] Compared with the prior art, the advantages of the present application are as follows:

[0018] 1. Compared with the traditional PC stairs, the steel and plate combined assembly type stairs of the present application are more economical, greatly reducing the cost of the stairs, and are convenient to assemble, can be built on site, have a shorter construction period and are more widely applicable.

[0019] 2、Compared with the traditional all-steel stairs, the structure of the step folding piece is ingeniously adjusted, the traditional all-steel stairs are used to make the step plate as a whole, and the skirting plate is disconnected, the step plate is disconnected in the application, and the skirting plate and the local step horizontal segment are connected as a whole, forming a "Z" shape, which is good in stress, and can be bent and formed by galvanized material, which is beautiful and durable; another common practice of the traditional all-steel stairs is that the step plate and the skirting plate are connected as a whole, which is not only heavy, but also deformed by welding, and the appearance is not beautiful.

[0020] 3、The rest platform plate and the step plate are both fiber cement plates as permanent bottom molds, which are combined with assembly and cast-in-place to meet the assembly requirements, reduce labor and material consumption; partial cast-in-place also ensures the waterproofness and firmness of the step, improves the comfort of use, and reduces the brushing area of fireproof paint compared with the all-steel stairs.

[0021] 3、The structure of factory prefabrication and on-site assembly can meet the requirements of multiple fields including residence, business, industry and the like, in the construction stage, without placing steel mesh and pouring concrete, only the ladder beam, the step folding piece and the step plate need to be built, so that the stairs can be temporarily used in the construction site, and after other constructions are completed, the steel mesh can be laid and the concrete can be poured to complete the construction, so that the application range of the stairs is wider, and the safety and convenience of the on-site construction are improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a system schematic view of the steel and plate combined assembly type stairs in the embodiment one of the application.

[0023] Figure 2 It is an installation step schematic view of the steel and plate combined assembly type stairs in the embodiment one of the application.

[0024] Figure 3 It is a connection schematic view of the wall-adjacent side ladder beam and the special-shaped step folding piece in the embodiment one of the application.

[0025] Figure 4 It is a connection schematic view of the middle ladder beam and the special-shaped step folding piece in the embodiment one of the application.

[0026] Figure 5 It is a structure schematic view of the step folding piece in the embodiment one of the application.

[0027] Figure 6 It is a cross-section structure schematic view of the wall-adjacent side ladder beam and the special-shaped step folding piece in the embodiment two of the application.

[0028] Figure 7 It is a structure schematic view of the all-steel stairs in the prior art. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further described below.

[0030] Example 1:

[0031] like Figure 1 As shown, the present invention proposes a steel and plate combined assembled staircase, comprising two ladder beams 1, a plurality of step folding members 2, a plurality of treads 3, a plurality of skirting boards 4 and a plurality of steel meshes 5;

[0032] A plurality of tread folding members 2 are arranged in a stepped manner with equal spacing between the two ladder beams 1, and a tread plate 3 is set between two adjacent tread folding members 2. In this embodiment, the ladder beam 1 is an integrally cast channel steel or H-shaped steel; Figure 3 As shown, the ladder beam 1 includes a horizontal portion 11 and an inclined portion 12; the surface of the horizontal portion 11 is used to lay the rest platform board 8, and the inclined portion 12 is used to build the ladder;

[0033] The flange or web of the horizontal portion 11 is pre-set with multiple connectors; the rest platform plate 8 is mounted between the horizontal portions 11 of the two ladder beams 1; and the rest platform plate 8 is fixedly connected to the connectors on both sides by bolts or welding, so that the rest platform plate 8 is mounted on the upper flange of the horizontal portion 11 or fixedly connected to the web of the horizontal portion 11;

[0034] The upper flange or belly of the inclined portion 12 is pre-set with multiple connecting parts; the step folding member 2 is fixedly connected to the connecting parts on both sides by bolts or welding, so that the step folding member 2 is mounted on the upper flange of the inclined portion 12 or fixedly connected to the belly plate of the inclined portion 12.

[0035] When the staircase is used in a residential building, Figure 3 and Figure 4 As shown, the connecting parts of the ladder beam 1 on the side against the wall are all arranged on the upper flanges of the horizontal part 11 and the inclined part 12, so that the rest platform board 8 and the step folding piece 2 are both placed on the upper flange surface of the ladder beam 1 on the side against the wall; the shelving connection method makes the ladder beam 1 have a stronger bearing capacity for loads; in addition, on the side of the stairs against the wall 9, if the step folding piece 2 is connected to the web of the ladder beam 1, the flange of the ladder beam 1 will extend outward relative to the side of the stairs, resulting in an increase in the width of the stairs; and most residential corridors have limited space, and the flange of the ladder beam extending on the side against the wall is not only unsightly but also occupies a large amount of corridor area.

[0036] The connecting parts of the ladder beam 1 on the side away from the wall 9 are all arranged on the webs of the horizontal part 11 and the inclined part 12, so that the rest platform plate 8 and the step folding piece 2 are both connected to the web of the ladder beam 1 on the side away from the wall 9; the upper flange of the ladder beam 1 on the side away from the wall 9 often needs to be designed with a fence and a handrail. Therefore, the web of the ladder beam 1 on the side away from the wall 9 is connected to the side of the stairs, which facilitates the addition of fences and handrails and increases its practicality.

[0037] When the stairs are used in other situations, the connection method between the step folding piece 2 and the web of the ladder beam 1 is adopted. The purpose is to facilitate the addition of fences and handrails on the upper flange surfaces of the ladder beam 1 on both sides of the stairs, thereby ensuring safety in use.

[0038] In this embodiment, a plurality of profiled load-bearing secondary beams 10 are arranged between the two ladder beams 1 below the rest platform plate 8 to increase the overall maximum bearing capacity.

[0039] In this embodiment, the rest platform board 8 and the step board 3 are both made of fiber cement boards, which effectively reduces the overall cost.

[0040] In this embodiment, if Figure 5 As shown, the step folding member 2 is a prefabricated steel structure folding member, including a first horizontal portion 21, a vertical portion 22 and a second horizontal portion 23; the first horizontal portion 21 is vertically connected to one end of the vertical portion 22, and the second horizontal portion 23 is vertically connected to the other end of the vertical portion 22; in addition, at the other end of the second horizontal portion 23, there is a bent portion 24 of an "L"-shaped steel, which is used to connect and support the inclined portion 12 of the ladder beam 1.

[0041] Between two adjacent tread folds 2, the second horizontal portion 23 of the upper tread fold 2 is parallel to the first horizontal portion 21 of the lower tread fold 2 and is located on the same horizontal plane; the tread 3 is mounted between the first horizontal portion 21 and the second horizontal portion 23 on the same horizontal plane, and the tread 3 is fixedly connected to the first horizontal portion 21 and the second horizontal portion 23 by self-tapping screws; the skirting board 4 is fitted with the vertical portion 22 of the tread fold 2 and is fixedly connected to the vertical portion 22 by self-tapping screws. Figure 7 As shown, this is the design method of the existing all-steel staircase tread folding member 2, which utilizes a stepped arrangement method between two ladder beams of multiple tread folding members 2, so that the tread folding members 2 can be used directly as foot pedals. The adjacent upper and lower foot pedals are hollowed out, and no connection measures are taken, which cannot bring a sense of security to the users, and the overall force cannot be strongly guaranteed.

[0042] The arrangement method of the step folding piece 2 can directly use the vertical part 22 of the step folding piece 2 as a kick plate, and after laying the step plate 3, the step folding piece 2 can be used as a temporary staircase. After the upper and lower step plates 3 are connected with the step folding piece 2, the step folding piece 2 can be directly used as a kick plate connecting the upper and lower step plates 3, greatly reinforcing the overall stress structure, and without excessive increase in the amount of steel material used, but only by skillfully changing the connection angle of the step folding piece 2 and the ladder beam 1. At the same time, during the construction stage, the design scheme of using the step folding piece 2 as a kick plate will not leave hollow points like traditional all-steel staircases, and will not cause the construction personnel to step on nothing, thereby ensuring the safety of the construction personnel.

[0043] If the traditional PC floor and all-steel floor are designed with a kick plate, the kick plate is generally higher than the horizontal surface of the step plate, which is convenient for the pouring of concrete in the later stage. During the construction stage, the concrete is generally not poured in advance, but is used as a temporary staircase for construction personnel. If the step plate is installed in advance, the part of the step plate that is higher than the step plate may cause inconvenience to the construction personnel, or even cause the construction personnel to stumble. The step folding piece 2 is temporarily used as a kick plate in the present application, so there is no part of the kick plate that is higher than the step plate, and the construction personnel can use it with confidence. After the construction is completed, a step plate 3 made of fiber cement board is added to the vertical part 22 of the step folding piece 2, and finally the concrete is directly poured to complete the construction.

[0044] The lower end surface of the kick plate 4 abuts against the upper surface of the step plate 3 located in the lower layer, and the upper end surface of the kick plate 4 extends out of the upper surface of the step plate 3 located in the upper layer by a height of several, such as 40 mm, thereby forming a “step groove” with the step plate 3, the two side ladder beams 1 and the kick plate 4 located in the upper layer, which is used for placing a steel mesh 5 and pouring concrete. Before the step plate 3 places the steel mesh 5, an anti-slip strip 6 is placed on the surface of the step plate 3, which not only protects the fiber cement board from being damaged, but also plays a decorative and anti-slip role. For staircases with low decoration requirements, the above-mentioned kick plate 4 can not form a “step groove”, but directly with the step plate 3 to be flat; no longer pouring concrete.

[0045] As shown in Figure 2 , the installation steps of the steel and plate combined assembly type staircase of the present application are as follows: As shown in Figure 2 a, first, two ladder beams 1 and a plurality of step folding pieces 2 are fixedly connected; As shown in Figure 2 b, then the step plate 3 and the rest platform plate 8 are arranged on the surface of the ladder beam 1 and the step folding piece 2, and are fixedly connected with the step folding piece 2 by using bolts, and a profiled material load-bearing secondary beam 10 is arranged below the rest platform plate 8.

[0046] After the above steps, the staircase is preliminarily installed and can be preliminarily used as a staircase on the construction site. At this time, the skirting board 4 is not installed, which will not cause any impact on the walking of the construction workers. After other projects are completed, the staircase can be finally improved.

[0047] After other construction is completed, check Figure 2 Check if the stair tread 3 shown in b is damaged due to construction. If damaged, replace it in time. Figure 2 As shown in Figure c, the skirting board 4 is installed, and the upper end surface of the skirting board 4 extends a certain height, such as 40 mm, from the upper surface of the step board 3 located on the upper layer, thereby forming a "step groove" for placing the steel mesh 5 and pouring concrete together with the step board 3, the ladder beams 1 on both sides and the skirting board 4 located on the upper layer.

[0048] like Figure 2 As shown in d, after the installation of the skirting board 4 is completed, the anti-slip strip 6 is installed at the front edge of the step board 3;

[0049] like Figure 2 As shown in e, after the anti-slip strip 6 is installed, the steel mesh 5 is laid on the surface of the tread 3;

[0050] like Figure 2 As shown in FIG. 5 , after the steel mesh 5 is installed, fine stone concrete is poured in the step groove, and surface curing agent or epoxy coating is applied on the tread surface and the four sides of the skirting board to decorate the surface effect.

[0051] like Figure 2 As shown in FIG. 6 , the gypsum board 7 is finally fixed under the special-shaped step folding piece 2 .

[0052] The following will compare the economic efficiency of the steel and plate combined assembled staircase of the present invention with the traditional PC staircase through specific measurement data.

[0053] All three types of stairs have two platforms of 1400mm, 9 steps (8 sides), step height of 155.56mm, side width of 260mm, and stair section width of 2080mm; the horizontal length of the entire staircase is 4880mm; the stair width is 1.2 meters; the projected area of ​​a stair section including the platform is 5.856 square meters.

[0054] 1. PC stairs: factory price 3000 / cubic meter; freight and hoisting fee 500 yuan / cubic meter; stair tread thickness 200, 9 steps, equivalent to 37mm thickness, stair tread thickness converted to projected area 214mm, total equivalent thickness 251mm;

[0055] The price of one stair section is: 3500 yuan / cubic meter*251mm*1.2m wide*4.88m long=5145 yuan; the unit price per square meter is: 878 yuan / square meter;

[0056] 2, steel and concrete combined assembly stairs: ladder beam adopts 18a# channel steel: 20 kg / m; Length 5223 mm, two, total weight: 209 kg; According to 7 yuan / kg = 1462 yuan;

[0057] Step adopts 50+155+50 2mm galvanized folding piece; A total of 9, 1.2 meters long, total weight 43 kg; According to 7 yuan / kg; 300 yuan;

[0058] The step uses 12mm thick fiber cement board: a total of 8, area 1200*360*8=2.5 square meters*50 yuan / square meter=125 yuan;

[0059] Skirting board adopts 12mm thick fiber cement board: 9 pieces: 1.2*0.155*9*50 yuan / square meter=83.7 yuan; (30 yuan material, 20 yuan labor)

[0060] C-shaped steel under the platform <@400, a total of 10, 48 kg; 336 yuan;

[0061] The platform adopts 12mm thick fiber cement board: area 3.36 square meters, 50 yuan / square meter=168 yuan;

[0062] The step surface prevents 2@50 mesh, and pours 40mm fine stone concrete; According to 1200 yuan / cubic meter=281 yuan;

[0063] The above total: 2692 yuan.

[0064] As can be seen from the above, the steel and plate combined assembly stairs of the present application are the most economical among the stairs with the same specifications and parameters.

[0065] Example two:

[0066] Example two and example one are partly the same structure, and the same structure is not repeated again, and the difference technical features are that, for example Figure 6As shown, the stair near the wall 9 side adopts the hemming stair beam 1, the hemming stair beam 1 includes a connecting web 13 and a metal hem 14; The connecting web 13 is provided with a connecting piece, realizing the fixed connection of the connecting web 13 and the step folding piece 2; The upper and lower ends of the connecting web 13 are connected with the metal hem 14, the metal hem 14 is designed as a transverse folding "L" shape, the hem of the metal hem 14 can be attached to the wall 9, and is fixedly connected with the wall 9 through a bolt, the design scheme of the metal hem 14 is convenient for the direct fixed connection of the stair beam 1 and the wall 9, and can also be used as a kick line, achieving an aesthetic effect; This connection mode is different from the design scheme of the stair frame of the wall side in the first embodiment, which is arranged on the flange of the stair beam 1, can avoid the effect that the stair beam arranged below the upper stair is not beautiful when looking at the upper stair from the lower stair, and is more suitable for civil residences with high aesthetic requirements; It should be pointed out that, in order to avoid the problem that the flange of the stair beam 1 occupies too much corridor space in the web connecting mode, the horizontal edge of the flange, i.e. the metal hem 14, can be appropriately made into a narrow edge to achieve the purpose of saving space.

[0067] The above is only the preferred embodiment of the present application, and does not limit the present application in any way. Any person skilled in the art can make any equivalent replacement, modification or change of the technical scheme and technical content disclosed in the present application without departing from the scope of the technical scheme of the present application, which still belongs to the protection scope of the present application.

Claims

1. A steel and plate combined assembled staircase, characterized in that: It includes two ladder beams, multiple step folding parts, multiple step plates, multiple skirting boards and multiple steel meshes; The two ladder beams are arranged in parallel, and a plurality of tread folds are arranged in a stepped manner at equal intervals between the two ladder beams. The tread plate is arranged between two adjacent tread folds; the steel mesh is laid on the surface of the tread plate; and the skirting board is arranged between two adjacent tread plates. The ladder beam is formed by integral casting of channel steel or H-shaped steel; the ladder beam includes a horizontal portion and an inclined portion; the surface of the horizontal portion is used to lay the rest platform board, and the inclined portion is used to build the stairs; The upper flange or the web of the horizontal portion is pre-set with a plurality of connectors; the rest platform is mounted between the horizontal portions of the two ladder beams; and the rest platform is fixedly connected to the connectors on both sides by bolts or welding; The upper flange or the belly of the inclined portion is pre-set with a plurality of connecting pieces; the step folding piece is fixedly connected to the connecting pieces on both sides by bolts, welding or plug-in connection; Below the rest platform plate, a plurality of profiled load-bearing secondary beams are arranged between the two ladder beams; The step folding member is a prefabricated steel folding member, comprising a first horizontal portion, a vertical portion, and a second horizontal portion; the first horizontal portion is vertically connected to one end of the vertical portion, and the second horizontal portion is vertically connected to the other end of the vertical portion. Between the two adjacent tread folding members, the second horizontal portion of the tread folding member on the upper layer is parallel to the first horizontal portion of the tread folding member on the lower layer and is located on the same horizontal plane; the tread is erected between the first horizontal portion and the second horizontal portion on the same horizontal plane, and the tread is fixedly connected to the first horizontal portion and the second horizontal portion by self-tapping screws; the other end of the second horizontal portion is connected to a bent portion of an "L"-shaped steel, and the bent portion is used to connect and support the inclined portion of the ladder beam; The connecting parts of the ladder beam on the side close to the wall are all arranged on the upper flanges of the horizontal and inclined parts, so that the rest platform plate and the step folding parts are all placed on the upper flange surface of the ladder beam on the side close to the wall; the connecting parts of the ladder beam on the side away from the wall are all arranged on the webs of the horizontal and inclined parts, so that the rest platform plate and the step folding parts are all connected to the webs of the ladder beam on the side away from the wall.

2. The steel and plate combined assembled staircase according to claim 1, characterized in that: The rest platform board and the step board are both fiber cement boards.

3. The steel and plate combined assembled staircase according to claim 1, characterized in that: The skirting board is arranged to fit the vertical portion of the step folding piece and is fixedly connected to the vertical portion by self-tapping screws.

4. The steel and plate combined assembled staircase according to claim 1, characterized in that: The lower end surface of the skirting board is in conflict with the upper surface of the tread located on the lower layer, and the upper end surface of the skirting board extends a certain height above the upper surface of the tread located on the upper layer, thereby forming a tread groove for placing steel mesh and pouring concrete together with the tread, the ladder beams on both sides and the skirting board on the upper layer.

5. The steel and plate combined assembled staircase according to claim 1, characterized in that: Before placing the steel mesh on the surface of the tread, an anti-slip strip is placed on the end of the surface of the tread.

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