JP3287816B2 - Building interior stairs - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a staircase provided inside a building, and more particularly to a staircase which is temporarily installed prior to building construction, can be installed simultaneously with building construction, has excellent soundproofing properties, and is easily detachable. The present invention relates to a staircase inside a building having a tread plate.

[0002]

2. Description of the Related Art Conventionally, there are the following methods for executing stairs inside a building. One of them is a building-integrated staircase, which is cut into the actual size of the staircase by a formwork carpenter at the construction site using building panels, sangi, square materials, etc. Together, one by one, a three-dimensional staircase with a formwork is made, and a reinforcing steel bar is reinforced with reinforcing steel in the formwork, and then the concrete is poured into the formwork and cured to harden the floor. The main landing of the club, the middle landing between floors, and the stairs that form the stairs are all integrated.

[0003] When the steps inside the building are to be implemented by steel steps, the main parts of the main stairs, the intermediate landing, the stairs, etc. of the stairs are preliminarily made of steel material in the factory according to the production drawings. The main part is positioned and mounted inside the building being lifted and built by the hoist, and then formed and provided by placing ready-mixed concrete on the landing and tread portions.

On the stairs inside the building, for example, as described in JP-A-6-146520, a landing and stairs are integrated into a PC (precast concrete).
Japanese Unexamined Patent Publication No. Hei 6 (1994), which is manufactured in a factory in advance and is assembled at a building site by supporting stairs on beams protruding on both sides of the middle wall of the building.
As described in Japanese Patent No. 1747, the landing and the stairs are separately made of PC plates, and the stairs are attached to both sides of the wall pillars with bolts, and the landings, the sasara girder, the treads, etc. are integrated. There is also an enforcement method in which the landing is joined to the building by a connecting plate to support the landing.

[0005]

However, the above-mentioned conventional stairs inside a building, especially in the case of concrete stairs reinforced integrally with the building, require a very long time in the manufacturing process. It is. Within the construction period of the site where the building is restricted, the stairs of the internal stairs are portions that take a long time to manufacture sasashi girders, treads, etc., and are portions that cause high costs.

Further, when the internal stairs are implemented by steel frame stairs, the time required for work on site is shorter than in the case of the above-described concrete, because the steps are partially manufactured in advance in a factory. Is shortened and greatly improved,
In many cases, steel columns and beams are required to support the stairs, and this is not an improvement in terms of cost. However, it is remarkable because of the internal stairs.

[0007] Furthermore, when the conventional landing and staircase sections are made of a PC version and assembled into a building, if the landing and staircase sections are integrated, the weight becomes large and the wall columns, The support to the building main body requires a mounting means having a considerable strength, and the installation in that position also requires careful handling of the crane. Furthermore, even if the landing and the stairs are separately made of PC version, the landing which has a certain weight to the already built building,
Supporting the staircase requires special wall pillars and high-strength fixtures for installation, which not only increases the cost, but also reduces the work space inside the already built building. It had to be carried out in a time-consuming assembly.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a staircase inside a building provided with a stepboard of a staircase which is not only lightweight, easy to attach and detach, but also excellent in soundproofing effect and decorativeness. It is intended to provide.

[0009]

In order to achieve the above-mentioned object, a stair inside a building according to the present invention comprises a main landing at a building floor, an intermediate landing at a substantially intermediate height between building floors, and a wall-side floor. A girder, a central side girder, a tread spanned between these girder girders, and an internal staircase for a building having a staircase composed of a handrail attached to the girder girder, wherein the tread of the staircase is A steel plate having an upright portion formed by bending both ends of the depth side and the front side from the flat portion at right angles in the opposite direction by an appropriate length, respectively, and extending integrally with the lower surface side of the steel plate in the longitudinal direction. One or more steel pipes that are welded so as to be formed, and are formed by covering the whole with a flame-retardant elastic material, and between the lower surface on the front side of the tread plate and the depth-side standing portion of the lower tread plate. For blinds to close the door Characterized in that it has.

In the building interior stairs, a main tread surface of the covered tread is covered with a flameproof carpet, and a groove in which fluorescent rubber is embedded is formed in the tread surface on the near side.

In the staircase inside the building, a tread plate is formed by a steel pipe and a round screw threaded at both ends with respect to a nut fixed to the wall side of the slab and embedded in the wall. The rod is attached to the girders by screwing a screw at one end of the rod and screwing a nut to a screw at the other end of the round bar protruding from the central girders.

In such a building staircase, the connecting portion of the tread is provided with an engaging groove for holding one end of the blind plate on an elastic material coated on the lower surface on the front side of the tread, and a blind between the engaging groove and the engaging groove. It is characterized by including a groove formed at the upper end of the depth-side standing portion of the lower tread so as to hold the other end of the plate.

Further, in such a building interior staircase, a flameproof carpet is laid on each landing in accordance with the flameproof carpet covering the main tread surface of the tread.

In such a building staircase, the internal staircase including the tread as described above is for a building having a concrete casting wall portion, and the landing hall is located at the building floor position of the wall portion or at the building floor portion. A plurality of anchors provided to partially enter the three sides and projecting from the three sides, and the intermediate landing partially enters the wall at a substantially intermediate height between the building floors And having a plurality of anchors protruding from the three sides,
Wall-side girders that are bridged over the landings located above and below and that are adjacent to the wall, central-side girders that are located in the center of the stairs and that are fixed to the landing, and are passed and fixed between these girders A step rail, a handrail having a parallel support bar attached to the slab and having a standing upright, and further fixed to the wall-side side surface of the wall-side slab so as to protrude toward the inside of the wall; A plurality of stud bolts, the landing and the stairs are positioned at the respective height positions inside the building prior to the construction of the building and temporarily installed, and the anchors and stud bolts are simultaneously attached to the wall when the wall is poured into concrete. It is characterized by being installed by embedding it inside the part.

[0015]

The stairs inside the building having the above structure are a main landing at a building floor, an intermediate landing at an almost intermediate height between building floors,
An internal staircase for a building having a wall-side girder, a center-side girder, a tread plate passed between these girder girder, and a stair portion formed of a handrail attached to the girder, The tread of the section, the steel plate having an upright portion formed by bending the both ends of the depth side and the near side from the flat portion at right angles in the opposite direction by an appropriate length, respectively, and in the longitudinal direction on the lower surface side of this steel plate It has one or more steel pipes welded so as to be integrally extended, and is formed by covering the whole with a flame-retardant elastic material. In high-rise buildings, the total weight can be significantly reduced. In addition, it is used as a staircase inside the building at a place with a high degree of sealing, suppressing the occurrence of walking sound that is a problem on the stairs,
Soundproofing is enhanced. And since there is a connecting portion for a blind plate that blocks between the lower surface on the front side of the tread plate and the standing portion on the depth side of the lower tread plate, it is necessary to attach a blind plate to close a gap between the upper and lower stages. It can be easily performed by attaching to this connection portion.

Further, the main tread surface of the covered tread is covered with a flameproof carpet, and a groove in which fluorescent rubber is embedded is formed in the front tread surface, so that the soundproofing effect of the flameproof carpet is further enhanced. Not only that, the safety as an evacuation stair is also improved, and the evacuation stair is used as an evacuation stair to ensure the confirmation of the tread plate even in the darkness at the time of a power failure due to the emission of fluorescent rubber.

In this building interior staircase, the treads are passed through a steel pipe and threaded at both ends against the nuts fixed to the outside of the wall-side girders and embedded in the wall. As one end of the round bar is screwed in, and a nut is screwed on the other end of the round bar protruding from the central side girder, so that it can be attached if it is necessary to replace it due to damage to the tread plate To remove the nut that tightens and fixes the round bar on the center side girder side, remove the round bar from the nut on the wall side girder, pull out the round bar from the pipe, and easily remove the treadle from the girder Can be removed and replaced with undamaged treads.

In such a staircase inside the building, the connecting portion of the tread plate forms an engaging groove for holding one end of the blind plate in the elastic material coated on the lower surface on the front side of the tread plate, and the depth side of the tread plate of the lower step. Because the other end of the blind plate is held between the groove formed at the upper end of the set portion and the tread plate steel plate, the steel plate and the steel plate are formed at the same time when the integral pipe is covered with the elastic material. The mating grooves can be provided at the ends of the standing portions on the near side of the lower surface of the tread plate and the depth side of the tread plate, so that the work of mounting the blind plate can be easily performed.

Further, in such a staircase inside the building, since the flameproof carpets are laid on each landing in accordance with the flameproof carpet covering the main tread surface of the tread, the color of the flameproof carpet can be freely selected. The decoration can be considered comprehensively, including the walls of the staircase.

The staircase inside the building having the stairs provided with the treads as described above is provided so as to partially enter the three sides on the wall or the building floor at the building floor, and protrudes from the three sides. It has a plurality of anchors embedded in a wall or a floor, and is made of PC (precast concrete) plate and made in a specialty factory in advance. In order to temporarily arrange the jig at the position, a mount for the temporary landing jig for the main landing is prepared. For this stand, the PC as described above
The main landing made of the plate is lifted by the lifting machine, and then gently lowered on the landing supporting portion, and the main landing is positioned and fixed at the position of the design drawing. Next, an intermediate landing having substantially the same shape and structure as the main landing is provisionally provided corresponding to an intermediate position between the building floors, and thus is prepared in the same manner as the main landing stand. In the same manner as the main landing, the pre-made intermediate landing made of PC version is slowly lifted by the lifting machine and gently lowered to the landing support of the mounting, It is fixed while adjusting.

The pedestal for the installed intermediate landing is connected to the pedestal of the main landing which has been set, via fixing braces, and fixed to the place by bolts.
By firmly tightening and fixing the temporarily tightened bolts and the like, the installation of the assembling jig for temporary installation of the stairs is completed prior to the construction work of the building body.

Thereafter, between the intermediate landing and the installation surface of the assembling jig, the stud bolt embedded in the wall of the building is fixed so as to protrude to the side, and the girder at the center of the stairs. The tread plate having the above-described structure, which is fixed across the stairs, and a stair portion having a handrail stood and mounted between two rods parallel to the sasara girder are lifted by a hoist, lowered and arranged, and The upper end of the girder is fixed to the mounting portion of the intermediate landing, and the lower end is fixed to the installation surface. Then, between the main landing at the upper floor and the intermediate landing, the stairs with the same configuration as the above stairs fix the ends of the girder to the mounting part of each landing, so that the temporary stairs are built Completed prior to construction of

Thereafter, a formwork for forming the wall of the staircase is attached so that a part of the landing area along the three side edges on the wall side enters the wall or the floor, and The formwork is mounted so that the stud bolts of the wall-side girder are located inside, and the walls and floor are arranged. Then, concrete is cast on the wall of the staircase and the upper floor, so that the anchors of the landings and the stud bolts of the stairs are buried in the wall or the floor. After the concrete is cast, after a curing period, the concrete formwork is removed, and then the assembly jig is disassembled and removed from the staircase, thereby completing the building and the internal stairs.

Each of the above-mentioned operations is carried out by assembling the landing floor on which the mount of the assembling jig is completed in order to make the stairs to the next floor, and is sequentially carried out up to the top floor. Then, the stairs are installed and the steps are proceeded. However, since the weight of the treads of the stairs has been significantly reduced, the mounting work at the time of temporary installation is easier than before.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. First, the overall structure of a staircase inside a building according to the present invention will be described with reference to FIGS. 6 and 7. FIG. 6 is an elevational view showing the entirety of a staircase inside a temporary building prior to building construction. FIG. 7 is a plan view for explaining the temporary stairs of FIG. The stairs are a main landing 1 installed at a building floor position, an intermediate landing 2 installed at an intermediate position between floors, and a stair portion arranged between the intermediate landing 2 and the main landing 1 or a stair installation surface 9. In order to be temporarily installed prior to the construction of the building, the main landing stand 4 and the intermediate landing base 5 of the assembling jig are assembled, and the main landing 1 and the intermediate landing 2 are placed on them. The stairs 3 are attached to these landings 1 and 2 for temporary installation.

More specifically, as shown in FIG. 7, the landing 1 is made of a PC (precast concrete) plate having a thickness of 100 to 130 mm, and has a horizontal deformed reinforcing bar 12 and a vertical deformed reinforcing bar for reinforcement. 14 are embedded in a grid, the ends of which protrude from the side facing the building walls 6, 7 and are bent parallel to the side as anchors 13, 15 approximately 80 mm from the side. . Further, a piano hard wire 17 is provided on a stair portion side portion of the main landing 1 with a piano hard wire fixture 18 provided at a wall side end portion and a center portion side.
The main landing 1 is reinforced by being stretched in between. Formwork mounting inserts 19 are buried at appropriate intervals on the side surfaces facing the walls 6 and 7 of the main landing 1. In this way, the pre-made PC version of the landing hall has a load bearing strength of 250 to 300 kg / m ² .

The intermediate landing 2 is similar to the main landing 1,
Then, as shown in FIG.
mm PC (precast concrete) plate,
Horizontal and vertical deformed reinforcing bars 22 and 24 are embedded in a grid, and project from three sides so that the ends protrude into the walls 6 and 7 of the building.
It is bent so as to be parallel to the side at the length of m. The staircase side portion of the intermediate landing 2 has a piano hard wire 27 stretched between the piano hard wire fixtures 28 disposed between the center portion and both wall side portions, and the intermediate landing 2 is reinforced. ing. Formwork mounting inserts 29 are embedded and mounted at appropriate intervals on the side surfaces of the intermediate landing 2 on the side of the walls 6 and 7.

As shown in FIGS. 1 to 5, the staircase section 3 includes a staircase girder 32 and a center girder 34 on the staircase wall side of the building.
It is made of a 16 mm steel plate, and has been selected for applications having a width of 250 to 300 mm. Then, both girder 32, 3
4, a plurality of soundproofing treads 36 reinforced by a steel plate 362 are arranged. Between these treads 36, a blind plate 368 for closing them is attached. As shown in FIGS. 1 and 2, the tread plate 36 is formed such that a steel plate 362 having a thickness of 2.3 mm is bent at right angles on the tread plate depth side and the near side to form an upright portion 364, and , 19m diameter on the underside of steel plate 362
m, at least two hollow steel pipes 36 having a thickness of 2 mm
2 is welded and fixed. Further, as shown in FIG. 2, the entire surface including the portion of the steel pipe 366 is obtained by mixing a flame-retardant substance into a rubber material or by waste treatment. An elastic material using a chip such as a rubber material is coated and formed by pressing a steel plate 362 or the like with a press machine. In addition, the standing portion 364 on the depth side of the tread plate includes
Engagement groove 3 for holding blind plate 368 in elastic material portion
65 are formed to form a connection portion of the blind plate 368. Also, a blind plate 368 is provided on the rear surface on the front side of the tread plate 36.
An engagement groove 374 is formed to hold the upper end of the blind plate 368, similarly forming a connection portion of the blind plate 368.

A nut 372 fixed to the side wall of the wall-side girders 32 so as to be embedded in the wall part 6 is provided on the wall-side girders 32, and a screw is provided at both ends through which a steel pipe 366 is passed. The threaded round bar 370 is screwed. As shown in FIG. 1, the screw portion at the other end of the round bar 370 is tightened with a decorative nut 372 on a screw portion protruding from the mounting hole of the center side beam spar 34, so that the both side beams 32, 34 of the tread plate 36. Can be attached to With this attachment, when the tread plate 36 is damaged in some way and needs to be replaced, the nut 3 on the outer side of the central side girders 34
72 is removed, and the round bar 370 is attached to the wall side girder 32.
By removing the nut from the nut 372 fixed to the step board 36, the step board 36 can be removed and replaced with a new step board 36.

Further, as shown in FIGS. 3 and 4, the upper and lower two treads 36 are made of a resin or the like whose upper end is engaged with an engagement groove 374 formed on the lower surface of the front end of one tread 36. The blind plate 368 made of is fitted to engage with the receiving groove 365 of the blind plate 368 of the upright portion 364 made of an elastic material on the back side of the other tread plate 36 and is connected as shown in FIG.
As shown in FIG. 4, the treads 36 are continuously connected.

Further, both landings 1, 2 of the sasara girder 32, 34
The lowermost and uppermost treadboards 36 are arranged as shown in FIG. 5 and, though not shown, a blind plate 368 is appropriately attached. Furthermore, the central side spar girder 34
Although not shown, a support bar 38 is provided in parallel with the slab beam 34 as conventionally provided, and stands upright between a lower support bar and an upper support bar (not shown). A handrail having a standing bar is attached. This handrail may be attached later, and the wall-side girder 3
Handrails may also be provided on 2.

Further, as shown in FIG. 4, the landing girder 32 on the wall side of the staircase section 3 has
The stud bolts 31 corresponding to the anchors are arranged as shown in FIG. 4 and fixed by welding, and protrude so as to be embedded in the wall 6 of the building as shown in FIG. When the stud bolts 31 need strength according to the length of the stairs 3 and the like, as shown in FIG. It may be provided.

The wall-side spar girder 32 of the staircase 3 is fixed with bolts to a mounting plate integrally mounted with embedded nuts to the main landing 1 and the intermediate landing 2, and As shown in FIG. 7, the central sash girder 34 has a central sara fixing portion 16 made of a U-shaped steel material having a stud bolt 164 protruding from the central portion of the main landing 1 on the stair portion side. It has a hole and is integrally attached as a concave portion of the PC plate, and a center-side spar girder 34 is attached to the fixing portion 16 with a bolt. As shown in FIG. 5, the center-side slab girder fixing portion 16 is made substantially coincident with the extension of the upper edge of the slab girder 34 in order to narrow the space between the handrail 38 and the upper surfaces of the landings 1 and 2. It may have an enlarged portion 162 that expands upward.

As described above, the tread plate 36 attached to the both girders 32, 34 further has a concave portion formed entirely or partially on the main tread surface, and a flameproof carpet 376 is adhered and covered therein. It is provided in. This flameproof carpet 376 may be a commonly used tile carpet made of 100% polypropylene or a needle punched carpet made of 50% acrylic and 50% polyester. The interior staircase is provided with fire protection around the walls. In particular, it is not necessary to use a flame-retardant material, but using a flameproof carpet is also advantageous for preventing fire in the staircase. In addition, by adopting the above configuration, the weight of the tread plate 36 can be manufactured to be less than half the weight of a general tread plate. For example, when the tread plate 36 is used for internal stairs from the first floor to the 30th floor, Means that the total weight can be reduced by a considerable amount as compared with the conventional one. Note that the flameproof carpet 376 provided on the tread 36 may be attached to the landings 1 and 2 so as to not only cope with fire protection but also enhance the soundproofing effect, and to enhance the decorativeness of the staircase interior. Can also be selected.

Further, in addition to the above configuration, the tread plate 36 is provided with a plurality of non-slip grooves 380 along the longitudinal direction at the front end of the main tread surface.
It is provided by fitting a fluorescent rubber 378 into a book. The fluorescent rubber 378 is obtained by mixing a fluorescent substance into the rubber material. The fluorescent rubber 378 is effective not only in the dark for stair guidance at the time of a disaster power outage, but also in the internal stairs. Part can be displayed.

The stairs having the above-mentioned structure are temporarily installed in the staircase room of the building to be built by an assembling jig prior to the construction of the building. As shown in FIGS. 6 and 7, the assembling jig includes a frame 4 for supporting the main landing 1 in accordance with the floor position on the upper floor, and an intermediate landing 2 at almost the middle between the installation surface and the upper floor. It consists of a gantry 5 for supporting. The gantry 4 is a gantry 5
Therefore, the gantry 5 will be described. Four pillars 4 made of a square pipe having a predetermined length are used.
6 is bolted and connected by a horizontal angle 43,
A diagonal line is bolted to each other via a stay plate 41 by a brace angle 47 and connected to each other by a bolt, and a screw jack 44 is attached to the lower end of each column 46 on the installation surface 9 via a plate 45. A hydraulic jack 42 for operating the landing support is located at the upper end of each column 46 and is supported and attached to the reinforcing frame 59 so as to be positioned, and is formed by bolting with a connector.

On the other hand, as shown in FIG. 6, the landing frame base 4 is formed by stacking two pedestals 5 having the same size as the pedestal 5 and bolting them with a connector 48 so that a hydraulic jack is provided at the upper end of the column 46. At the lower end, a screw jack 44 is placed on the installation surface 9 via a screw jack base 45, so that the approximate height of the landing support portion 42 can be adjusted. In addition, when the landing 1 is slowly lifted by the hoisting machine and gently lowered onto the landing support of the gantry 4 on the landing support of the gantry 4, the hydraulic jack 42 is operated. The ball bearing holding portion is lifted, and the landing 1 is supported on the ball bearing 422 so that the orientation and height can be finely adjusted by the reinforcing frame 5.
The turnbuckle 49 is provided between the four corners 9 and the four corners of the landing 1, and can be set to the position shown in the drawing and fixed to the gantry 4.

The adjustment of the landing 1 is performed by the mounting 5 of the intermediate landing 2.
Adjustment of the position at the time of installation on the top can be similarly performed. As shown in FIG. 6, the both stands 4 and 5 are connected and fixed to each other so as to be positioned on the setting surface 9 by the braces 56 and 58, and at this time, do not hinder the installation of the stair portion 3. Thus, the arrangement of the braces 56, 58 is determined, and the horizontal angles 43, the columns 46, and the ends of the braces 47 are bolted. Thereafter, the stairs 3 are further attached and fixed between the installation surface 9 and the intermediate landing 2 and between the intermediate landing 2 and the main landing 1.

Although not shown, a formwork for constructing a staircase of a building is arranged for the stairs temporarily provided as described above. The formwork is a building panel having a predetermined length and width arranged in parallel so as to form both surfaces of the wall, is framed and reinforced by a saw, and has a resin coating at the tip of a short tube arranged in parallel. It is formed by tightening and fixing a nut to a position that determines the wall width with a bolt via a form stopper.

In the above building panels, landings 1 and 2 have a thickness of 1
If it is 00 mm, the peripheral portions of landings 1 and 2 are made to enter the inside of the wall by about 20 mm, so that the formwork is moved to the position where the panel surface and the landing end surface are shown by the dotted line in FIG. 2, the upper and lower surfaces of the building panel are positioned so as to sandwich both upper and lower surfaces, and the position thereof is regulated by both protruding ends covered with a resin coating of a form stopper which is attached to the form mounting insert with bolts. Is positioned so that the distance between the ball and the landing surface is 20 mm.
In that case, anchors 13, 15, 23, 2 of each landing 12
5, and the stud bolt 31 of the staircase section 3 is located at the position shown in FIG.

When the formwork is assembled to the temporarily provided stairs as described above, concrete is poured into the formwork on the wall of the staircase room of the building body, and after that, after a curing period, the formwork is performed. The frame is removed and the internal stairs are completed. In this case, the handrail is not shown, but may be assembled later.

The above-mentioned work is repeated on each floor in order to temporarily set up the internal stairs and assemble the formwork, and the steps are performed up to the top floor to complete the internal stairs. In particular, from the state shown in FIG. 6, the completed landings 1, 2 up to the second floor
Is used to assemble and install a temporary assembly jig. In particular, the mount 5 for the intermediate landing 2 is approximately the same height as the mount 4 for the main landing 1 shown in FIG.
The installation surface is set to the completed intermediate landing 2, which is set on it, is used as a mount for the intermediate landing with the next floor, and a new intermediate landing is tentatively installed prior to the construction site. The main landing is also the main landing 1 at the already completed floor position, and a gantry having the same height as the gantry 4 shown in FIG. 6 is assembled and installed. The main landing on the next floor is constructed. Is tentatively established prior to.

[0043]

The stairs inside the building according to the present invention as described above have the following effects. In the building interior staircase according to the present invention, the tread of the staircase portion has an upright portion formed by bending both ends on the depth side and the near side by a suitable length at right angles in opposite directions from the flat portion, respectively. Since it has a steel plate and one or more steel pipes welded to the lower surface side of the steel plate so as to be integrally extended in the longitudinal direction, and is formed by covering the whole with a flame-retardant elastic material. The stairs can be made lighter, especially in super-high-rise buildings, so the total weight can be significantly reduced, and the generation of walking sounds is suppressed, and the soundproofing is enhanced. To play.

Further, since the main tread surface of the covered tread is covered with the flameproof carpet and the groove having the fluorescent rubber embedded in the front tread surface is formed, the soundproofing effect of the tile carpet can be further enhanced. In addition, the safety as an evacuation stair is also enhanced, and the evacuation stair is used as an evacuation stair to ensure the confirmation of the tread during guidance even in darkness during a power outage due to the emission of fluorescent rubber. Play.

Further, in the stairs inside the building, a treadle is passed through a steel pipe to a nut fixed to the outside of the wall-side girders and embedded in the wall, and a screw is screwed at both ends. One end of the cut round bar is screwed in, and a nut is screwed on the other end of the round bar protruding from the central side girder so that it can be attached by screwing. In some cases, the tread can be easily removed from the girders and replaced with an undamaged tread.

In such a staircase inside the building, the connecting portion of the tread plate forms an engaging groove for holding one end of the blind plate in the elastic material covered on the lower surface on the front side of the tread plate, and the depth side of the lower tread plate. Because the other end of the blind plate is held between the groove formed at the upper end of the set portion and the tread plate steel plate, the steel plate and the steel plate are formed at the same time when the integral pipe is covered with the elastic material. The mating grooves can be provided at the ends of the standing portions on the near side of the lower surface of the tread plate and the depth side of the tread plate, so that the work of mounting the blind plate can be easily performed.

Further, in such a staircase inside a building, since the flameproof carpet can be spread over each landing along with the flameproof carpet covering the main tread surface of the tread, the color of the flameproof carpet can be freely selected. That is, the decorativeness can be considered comprehensively including the walls of the staircase. And since there is a connecting portion for a blind plate that blocks between the lower surface on the front side of the tread plate and the standing portion on the depth side of the lower tread plate, it is necessary to attach a blind plate to close a gap between the upper and lower stages. It can be easily performed by attaching to this connection portion.

[Brief description of the drawings]

FIG. 1 is a plan view of a tread of a stair inside a building according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the tread plate taken along line II-II in FIG.

FIG. 3 is a cross-sectional view showing a connection state of upper and lower treads of stairs inside the building.

FIG. 4 is a cross-sectional view of a tread plate with respect to a wall-side slab girder of a staircase portion in a building internal staircase according to the present invention.

FIG. 5 is an explanatory view of a sasara girder mounting portion at the center of the landing on the stairs inside the building according to the present invention.

FIG. 6 is an elevational view showing a temporary state supported by a jig for assembling stairs inside a building according to an embodiment of the present invention.

FIG. 7 is an explanatory view of the interior stairs of the building as viewed from above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main landing 2 Intermediate landing 3 Staircase 4 Main landing stand 5 Intermediate landing stand 6 Building wall 7 Building wall 9 Base surface 12 Lateral deformed reinforcing bar 13 Anchor 14 Vertical deformed reinforcing bar 15 Anchor 16 Center side girder fixing part 17 Piano hard wire 18 Piano hard wire fixing device 19 Formwork mounting insert 22 Horizontal deformed reinforcing bar 23 Anchor 24 Vertical deformed reinforcing bar 25 Anchor 27 Piano hardwire 28 Piano hardwire fixing device 29 Formwork mounting insert 31 Stud bolt 32 Girder 34 Central gutter 36 Tread plate 38 Handrail lower support bar 41 Stay plate 42 Hydraulic jack 43 Horizontal angle 44 Screw jack 45 Screw jack base 46 Square pipe 47 Bracing angle 48 Mount connection tool 49 Land adjustment turnbuckle 56 Brace for connection 58 Brace for connection of gantry 59 Reinforcement frame 162 Enlarged portion of fixed portion of slab girder 164 Stud 362 Steel plate 364 Standing portion 365 Blind plate engagement groove 366 Steel pipe 368 Blind plate 370 Round bar 372 Decorative nut 374 Engagement groove 376 Flameproof carpet 378 Fluorescent rubber 380 Non-slip groove 422 ball bearing

Claims (6)

(57) [Claims] 1. A main landing at a building floor, an intermediate landing at an approximately intermediate height between building floors, and a wall-side girder, a center-side girder, and fixed between these girder. A tread, and an internal staircase for a building having a staircase composed of a handrail attached to the sasara girder, wherein the treads of the staircase are formed by appropriately opposing opposite ends from a flat portion on both a depth side and a front side. A steel plate having an upright portion formed by being bent at a right angle by a length, and one or more steel pipes welded to a lower surface side of the steel plate so as to be integrally extended in a longitudinal direction; And the steel pipe is entirely coated with a flame-retardant elastic material, and is connected to the lower surface on the front side of the tread plate and the standing portion on the depth side of the lower tread plate for a blind plate closing between them. Characterized by having a part Inside stairs. 2. The building interior stairs according to claim 1,
A staircase inside a building, wherein a main tread surface of the covered tread is covered with a flameproof carpet, and a groove in which a fluorescent rubber is embedded is formed in a tread surface on a front side. 3. The stair inside the building according to claim 1,
The tread plate is screwed with a screw at one end of a round bar threaded through the steel pipe and threaded at both ends, with respect to a nut fixed to the wall side of the wall side slab and embedded in the wall, A staircase inside a building, which is attached to the girders by screwing a nut on a screw at the other end of the round bar protruding from the central shirs. 4. The stair inside a building according to claim 1,
An engagement groove formed to hold one end of the blind plate on an elastic material coated on a lower surface on a front side of the tread plate, and the blind plate between the engagement groove portion and the engagement groove portion; A staircase inside a building, comprising a groove formed at an upper end of a depth-side standing portion of the lower tread plate that holds the other end. 5. The building interior stairs according to claim 1,
A staircase inside a building, wherein a flameproof carpet is spread on each landing in accordance with a flameproof carpet covering a main tread surface of the tread. 6. The internal staircase according to any one of claims 1 to 5, wherein the internal staircase including the tread is for a building having a concrete casting wall. A landing is provided at a building floor position or a building floor portion of the wall so as to partially enter the three sides into the wall, and has a plurality of anchors protruding from the three sides, and the intermediate landing is a building A plurality of anchors are provided so as to partially enter three sides into the wall portion at a substantially intermediate height position between floors and project from the three sides, and the staircase portion is located vertically. A wall-side spar girder spanned over the landing and adjacent to the wall, a center-side spar girder located at the center of the stairs and fixed to the landing, and the tread plate fixed between these slab girder , And take the said girder A plurality of handrails having parallel support rods attached and standing uprights, and further fixed to the wall-side side surface of the wall-side spar so as to protrude toward the inside of the wall; The landing and the stairs are positioned and temporarily installed at the respective height positions inside the building prior to the construction of the building, and the anchors and the stud bolts are simultaneously placed when the wall is cast into the concrete. A staircase inside a building, wherein the staircase is installed by being embedded in the wall.