JPH11303217A - Staircase structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide staircase structure capable of effectively utilizing the inside space of a building and fully securing width of a staircase. SOLUTION: In staircase structure incorporating a staircase provided with strings 31, 32 in a building, the upper stage side extension parts 31A, 32A of the strings 31, 32 are fixed on a wall 71, and a lower stage side end is fixed on a floor 80. Therefore the wall is provided in the width direction of the staircase, since the staircase may not be supported, the inside space of the building can be effectively utilized and the width of the staircase can be fully secured. The strings 31, 32 has the horizontal upper stage side extension parts 31A, 32A, and since they are formed in the form of a doglegged shape, a landing can be simply formed on the upper stage side extension parts 31A, 32A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a staircase structure for incorporating a staircase having a slab girder into a building.

[0002]

2. Description of the Related Art Generally, a stair provided in a building such as a house has a structure in which a plurality of steps are bridged between a pair of slabs and a riser is provided between each step. When assembling the stairs in the building, walls are provided at predetermined intervals in the width direction of the stairs, and the side surfaces of the girders are fixed and supported on the walls. At this time, since a vertical force is applied to the wall by the stairs, the wall supporting the stairs is formed to be thicker than a normal wall to secure necessary strength.

On the other hand, in recent years, in order to increase the industrialization rate and shorten the construction period at a construction site, a unit construction method in which a plurality of building units are manufactured in advance at a factory and these are combined at the construction site to construct a building has been used. Have been. The building unit is manufactured by connecting the upper ends and the lower ends of the four columns with beams, respectively, to form a rectangular parallelepiped skeleton, and assembling floor materials, wall materials, and the like to the skeleton.

Here, when building a unit-type building having a plurality of floors by stacking building units, stairs are incorporated into the building units arranged on the lower floor so that the floors on the upper and lower floors are continuous. Like the above-mentioned stairs, the stairs in such a unit-type building also support the load of the stairs by fixing the outer side surface of the girder to the wall provided in the building unit.

[0005]

In such a staircase structure, a wall for fixing the slab girder must be provided, and this wall must be formed thick, so that the living room space is reduced by the wall. Therefore, there is a problem that the internal space of the building cannot be used effectively. In a unit-type building, stairs are assembled in advance in a frame of a building unit at a factory, so that stairs must be placed in one building unit, that is, in a limited space. When the space for the stairs is limited in the building as in this unit building, the width of the stairs must be reduced by the amount of the wall.

An object of the present invention is to provide a staircase structure that can effectively utilize the internal space of a building and can secure a sufficient width of the staircase.

[0007]

The present invention will be described with reference to the drawings. The present invention relates to a staircase structure for incorporating a staircase 1 having slabs 21, 22, 31, and 32 into a building.
Sasara girder is a diagonal girder part 21C extending in the direction of inclination of the stairs,
22C, 31C, and 32C, and upper-stage extending portions 21A, 22A, which extend in the horizontal direction from the upper-stage end of the oblique girder portion.
31A, 32A, and is formed in a substantially letter shape, and the lower end of the girder girder is fixed to the floor 80 in the building.
The upper-stage-side extension portion is characterized in that it is fixed in a state where the upper-stage-side extension portion abuts against a wall 71 in the building.

[0008] In the present invention, since the upper extension and the lower end, which are the upper ends of the girder, are fixed to the wall and the floor, respectively, the side surfaces of the girder are fixed to the wall. This eliminates the need to provide a wall for supporting the stairs. Therefore, no space is required for the wall, so that the internal space of the building can be effectively used and the width of the stairs can be sufficiently secured. Further, if the upper end of the straight girder is simply struck against the wall, it will not be possible to move to the upper floor from the struck portion, but in the present invention, the girder has a horizontal upper-stage extension. Because the floor is formed on the upper side extension part because it is formed in a substantially V shape, even if the slab is fixed in a state where it hits the wall, it passes through this floor to the upper floor You can go back and forth. In addition, just by installing a sasara girder, the base of the floor can be formed by the upper side extension,
Installation work can be facilitated.

[0009] The sasara girder is provided in a pair.
Further, landings 4A and 4B are provided on the upper-side extension, and the landing is provided between a pair of sasara girders so that the upper surface is flush with the upper surface of the upper-stage extension. 45
It is desirable to include the support member and floor surface members 403 and 404 attached over the upper surfaces of the upper-side extension portions.

[0010] By providing the landing on the upper extension of the girder in this manner, there is no need to erect a pillar for supporting the landing, and the upper extension is used as a member constituting the landing. Since both can be used, the structure of the landing can be simplified and the number of members can be reduced. Further, since a landing can be formed simply by laying a support member between the slabs and attaching a floor material thereon, the installation work can be simplified.

A receiving member 41 provided with receiving surfaces 42A and 43A for receiving the upper-side extending portion of the slab is attached to the wall, and the end of the upper-side extending portion is attached to the receiving member 41. It is preferable that it is mounted on the mounting surface. With this configuration, the upper-side extension portion is placed on the placement surface to perform the positioning of the slab girder, and the positioned state can be maintained, so that the positioning operation and the fixing operation can be facilitated.

At this time, a floor 403 for the lower floor of the landing and an upper supporting member 47 for forming a step having a larger height than the floor are provided on the receiving member and the supporting member. On this upper support member, a floor material 404 for the landing upper stage may be attached, and the landing may be formed with a step. By forming the landing in a stepped manner as described above, the inclination angle of the stairs can be reduced, so that the stairs that can be easily moved up and down can be obtained.

[0013] In this case, the receiving member and the supporting member are extended so as to protrude from the pair of spar beams, and the upper supporting member is bridged over two portions of the receiving member and the supporting member protruding from the spar beam. Connecting members 48 and 49 are erected between the upper supporting members, and the connecting members 48 and 49 are connected to the sasara girder 21 and stairs extending upward from the landing.
It is preferable that the lower end of the lower side 22 is fixed.

In this manner, if the lower end of the girder extending upward from the landing is fixed to the connecting member provided between the upper supporting members, the folding stairs can be formed with a simple structure without providing a wall for supporting the stairs. it can.

In the above, the sasara girder has a lower extension 31 extending horizontally from the lower end of the diagonal girder.
B, 32B are provided, and the floor of the building is configured to include a lower beam 83 made of a channel material having a U-shaped cross section, and the lower extension of the sasara girder is housed and fixed inside the lower beam. Is desirable. In other words, when installing the girder, insert the lower extension into the lower beam,
The spar girder is rotated toward the wall with the lower extension part as a fulcrum, and brought into contact with the wall. Since the lower beam is made of the channel material, the lower-stage-side extension does not shift until the Sarasara is rotated and positioned, so that the work of installing the Sarashira can be facilitated.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a staircase 1 of the present embodiment incorporated in a box-shaped building unit 8.
The building unit 8 constitutes a unit type building (not shown) constructed by combining a plurality of building units, and is arranged on a lower floor portion of the building. On this building unit 8, a building unit 9 constituting the upper floor is arranged, and a lower floor 80 and an upper floor 90 are connected via the stairs 1. Stairs 1 are building units 8
Is a folding staircase that folds back at an intermediate height level. Stepped landing sites 4A and 4B are provided in the folded portion. The staircase 1 is divided into a staircase upper portion 2 and a staircase lower portion 3 at a turn-back portion, and a handrail panel 5 having a handle portion 6 is provided on each of the staircase portions. It is continuous. The staircase 1 is a partition wall 71, 7 on three sides excluding the side serving as the elevator in plan view.
2,73.

As shown in FIG. 2, the building unit 8 includes a rectangular frame 8A. This frame 8A
Are four pillars 81 (only two shown), an upper beam 82 (only two shown) connecting between the upper ends of these four pillars 81, and a lower pillar of the four pillars 81, respectively. It has a lower beam 83 (only two are shown) to be connected. Among these, the upper beam 82 and the lower beam 83 are formed of channel members having a U-shaped cross section. On the lower beam 83, a floor surface material 85 and a joint panel 86 provided between the floor surface material 85 and the floor surface material of an adjacent building unit (not shown) are installed. It is configured. Although only a part is illustrated, the upper-floor building unit 9 has substantially the same framework as the lower-floor building unit 8, and the upper-floor floor 90 is attached to the lower beam 83 to form the upper-floor floor 90. It is configured.

In the frame 8A, as shown in FIGS. 3 to 6, the above-mentioned partition walls 71, 72, 73 are installed in a U-shape in plan view to form a staircase. Although not shown, the partition walls 71, 72, and 73 are configured by partition panels in which a face material such as a gypsum board is stretched on a frame in which a core material is assembled in a rectangular shape.

The upper staircase 2 and the lower staircase 3 are respectively composed of a pair of slabs 21, 22, 31, and
32 (see FIG. 1 and FIGS. 4 to 6), a plurality of step boards 11 horizontally supported between these slabs 21, 22, 31, 32, and between these step boards 11 (however, Between the step board 11 and the landing 4 at the bottom of the stairs and the top of the stairs 3, and between the step 11 and the floors 80 and 90 at the top of the stairs 2 and the bottom of the stairs 3. And a riser plate 12 provided vertically. The material of the step board 11 and the riser plate 12 is arbitrary, but since it is a member exposed on the surface, a good appearance and tactile sensation can be obtained by, for example, forming a synthetic resin molded product containing wood flour. , And can be configured accurately and at low cost.

The girders 21 and 22 of the upper part 2 of the stairs are formed by a diagonal girder 21C (only one girder 21 is shown) extending in the inclined direction and a horizontal direction from the upper end of this diagonal girder 21C. And an upper-side extension 21A that extends. The upper-side extending portion 21A is a wedge-shaped protrusion-depression fitting along the extending direction and is integrated with the extending member 2.
3. This fitting portion is fixed by the joining plate 24 and has a structure that withstands a vertical shear load. On the lower end faces of these sasara girders 21 and 22,
Each of the ridges 14 is attached, and a ceiling panel 13 made of a gypsum board or the like is fixed to the lower surfaces of the ridges 14.

Sasara girders 31 and 32 of the lower part of the stairs 3 have diagonal girders 31C and 32C extending in the oblique direction, and extend horizontally from the upper and lower ends of the diagonal girders 31C and 32C, respectively. Outgoing parts 31A, 31B, 32A,
32B. Of these, the lower extension 31
B and 32B are inserted and fixed in the lower beam 83 constituting the floor 80, respectively.

The upper extension portions 31A and 32A are formed relatively long by the extension member 33 fixed by the joining plate 34, similarly to the above-mentioned upper extension portion 21A of the stair upper part 2. , And the sparsers 31 and 32 are formed substantially in the shape of a letter. The upper-side extension portions 31A, 31B
Is fixed in a state where it abuts against the partition wall 71, and is placed on a receiving member 41 horizontally attached to the partition wall 71. The receiving member 41 is formed in a substantially rectangular flat plate shape as shown in FIGS. 3 to 5, and receives the girders 31 and 32 at both ends in the horizontal direction. The receiving member 41 is fixed to a horizontal core (not shown) constituting the partition wall 71 by a fastener such as a nail, and one end of the receiving member 41 is in contact with the partition wall 72. Receiving material 4
1, upper end portions 31A, 32
Notches 42, 43 capable of storing A are formed. At the bottom of these notches 42, 43, mounting surfaces 42A, 42 for receiving the ends of the upper-side extensions 31A, 32A, respectively.
43A are formed. These notches 42, 43
With the upper extension portions 31A, 32A placed on the placement surfaces 42A, 43A, the upper surfaces of the upper extension portions 31A, 32A and the receiving member 41 have the same upper surface.

As shown in FIGS. 3 to 5, a rectangular flat auxiliary receiving member 44 is horizontally fixed to the partition wall 71 in series with the receiving member 41. The other end is in contact with the partition wall 73. The portion of the auxiliary receiving member 44 and the receiving member 41 which is surrounded by the one notch portion 42 includes
The upper-side extension 31A is fitted, and the other notch 4
The upper portion 32 </ b> A of the other slab girder 32 is fitted into the portion surrounded by 3 and the partition wall 72.

As shown in FIGS. 4 and 5, a long support member 45 is bridged over the corners of the girders 31 and 32, and the upper surface and the upper side extension of the support member 45 are extended. The upper surfaces of the portions 31A and 32A are flush with each other. As a result, the support member 45, the upper-side extension portions 31A and 32A, and the receiving member 41 are framed in a rectangular shape, and the floor surface material 403 is provided on each of the flush upper surfaces as shown in FIGS. Attached to the landing lower stage 4A.

As shown in FIG. 5, the supporting member 45 has a length protruding from the sasara beams 31 and 32 toward the upper step 2 (see FIGS. 1 and 2), that is, toward the partition wall 73. The directional end is connected to an auxiliary member 46 mounted horizontally on the partition wall 73. This auxiliary material 46 is used for the partition wall 7.
At the corners of 1, 73, they are connected to the auxiliary receiving member 44 described above. That is, the receiving member 41, the auxiliary receiving member 44, the supporting member 45, and the auxiliary member 46 are framed in a rectangular shape in the same plane along the partition walls 71, 72, 73. That is, landing 4A, 4
A lower frame portion 401 is configured as a base portion of B.

On such a lower frame portion 401, an upper frame portion 402 is arranged in parallel with the floor surface material 403 described above.
As shown in FIG. 7, a floor surface material 404 is mounted on the upper frame portion 402 to form a landing upper stage 4B. Such a landing upper stage 4B has a height level higher than that of the above-described landing lower stage 4A by an amount corresponding to the upper frame portion 402, so that steps are formed in the landings 4A and 4B. Returning to FIG. 5, the upper frame portion 402 includes the receiving member 41 and the supporting member 45.
A pair of upper support members 47 erected above and connecting members 48 and 49 connecting between the upper support members 47 are provided.

The upper supporting member 47 is a member for forming a step having a larger height than the floor surface material 403 of the landing lower stage 4A, and is formed by forming a core into a rectangular frame. One of the upper support members 47 of the pair of upper support members 47 is installed on the auxiliary member 46 of the lower frame 401. The connecting member 48 fixed to the end surface of the upper supporting member 47 on the side of the upper staircase 2 projects from the floor surface material 404 toward the upper part of the staircase 2 in plan view. The connecting member 48 is connected to the lower frame portion 40.
One support member 45 and two square members having the same cross section are overlapped and integrated, whereby a plurality of types of members can be cut out from one type of long material.

As shown in FIG. 2, the lower ends of the slab beams 21 and 22 of the upper staircase 2 are placed and fixed on the portion of the connecting member 48 protruding from the floor material 404. ing. Further, the upper-side extending portions 21 </ b> A of the girders 21 and 22 are inserted into the upper beam 82 and fixed via the bracket 25.

Returning to FIG. 1, the handrail panel 5 is arranged between the upper part 2 of the stairs and the lower part 3 of the stairs, adjacent to each other.
2, 31 are respectively fixed to the opposing surfaces. As shown in FIG. 7, the handrail panel 5 includes a frame 50 in which a core material 51 is framed, and a face material 52 made of plywood stretched on both sides of the frame 50. A cloth (not shown) is adhered to the sheet. Such a handrail panel 5 is fixed to the slabs 22 and 31 and the ridge 14 with a fastener 53 or an adhesive, and is structurally integrated. As a result, the girders 22 and 31 are reinforced, and the thickness of the girders 22 and 31 is adjusted to the other girders 21 and 32 in consideration of the reinforcing effect of the handrail panel 5.
It is formed thinner.

The handhold portion 6 is attached along the upper end surface of the handrail panel 5, and more specifically, a receiving member 61 fixed to the upper end surface of the handrail panel 5, And a coping member 62 that covers the receiving member 61. The receiving member 61 includes two rows of convex portions 61A that protrude upward along the longitudinal direction, and a portion sandwiched between these two rows of convex portions 61A is formed by a fastening tool 63 such as a screw. Is fixed to the core material 51. The cap member 62 has two rows of concave portions 62A that are opened downward and fit with the convex portions 61A of the receiving member 61, and are fixed to the receiving member 61 by press-fitting the concave portions 62A into the convex portions 61A. ing.

The receiving member 61 and the cap member 6 described above
2 is also attached to each side end surface of the handrail panel 5 to obtain a good appearance. At the folded portion of the stairs 1, as shown in FIG. 8, between the handrail panels 5 of the adjacent slabs 22 and 31, specifically, of the cap members 62 attached to the side end surfaces of the handrail panels 5. A long connecting member 64 is interposed therebetween, and the gap between the panels 5 is closed.

In the present embodiment configured as described above, the steps 1 are formed in the following procedure. First, as shown in FIG. 3, after a partition panel is assembled into the frame 8A of the building unit 8 to form a staircase including partition walls 71, 72, and 73, the receiving member 41, the auxiliary receiving member 44, and the auxiliary member 46 are formed. Are attached to the partition walls 71 and 73, respectively. Next, as shown in FIG.
32 is bridged between the lower beam 83 and the receiving member 41. In addition,
4 to 6, only the slabs 31 and 32 are illustrated, but the slabs 31 and 32 are integrated by previously assembling the step board 11 and the riser plate 12. At this time, the lower extending portions 31B, 32
B is inserted into the lower beam 83, and the lower side extension portions 31B, 3
By rotating the slab beams 31 and 32 toward the partition wall 71 with the support 2B as a fulcrum, the receiving members 4 for the upper extension portions 31A and 32A are received.
1 is placed on the placement surfaces 42A and 43A (see FIG. 3) and abuts against the partition wall 71. After this, the upper extension 31
A and 31B are fixed to the partition wall 71, respectively, and the lower extension portions 31B and 32B are fixed to the lower beam 83.

Then, the supporting member 45 is bridged and fixed on the slab beams 31 and 32 and the auxiliary member 46, and the lower frame portion 401 is fixed.
Team up. Next, as shown in FIG. 5, the upper supporting members 47 are arranged on the lower frame portion 401 and these are connected to the connecting members 4.
The frames are connected at 8, 49 to form an upper frame portion 402. In addition,
The upper frame 402 that has been framed in advance may be installed on the lower frame 401. Subsequently, as shown in FIG. 6, floors 403 and 404 and a riser 405 are attached to the upper frame portion 402 and the lower frame portion 401, respectively, to form landings 4A and 4B.

Thereafter, as shown in FIG. 2, the slabs 21 and 22 (in which the step plate 11 and the riser plate 12 are assembled) of the upper part 2 of the stairs are bridged between the upper beam 82 and the upper frame portion 402. At this time, the lower ends of the girders 21 and 22 are placed on the connecting member 48 of the upper frame 402, and the upper extensions 21A and 22A are inserted into the upper beam 82 and fixed respectively. In addition, the handrail panel 5 has previously
22 may be integrated, or it may be attached after the slabs 31 and 22 are installed.

According to the present embodiment, the following effects can be obtained. That is, the sasara girder 3 at the lower part of the stairs 3
Since the upper extension portions 31A, 32A and the lower extension portions 31B, 32B of the first and second 32 are fixed to the partition wall 71 and the floor 80, respectively, the side surfaces of the slab beams 31, 32 are fixed to the wall. Since there is no need, there is no need to provide a wall for supporting the stairs in the width direction of the stairs 1. Therefore, the space for the wall required for supporting the stairs 1 is not required, so that the internal space of the building can be effectively used and the width of the stairs 1 can be sufficiently secured.

Further, since the sparsers 31 and 32 are formed in a substantially V-shape having horizontal upper-stage extending portions 31A and 32A, the landing 4 is placed on the upper-stage extending portions 31A and 32A.
A and 4B can be formed, and the slabs 31 and 32 can be divided into partition walls 7.
Even if it is fixed in a state where it abuts on 1, it can go back and forth through the landings 4A and 4B. Furthermore, Sasara girder 31,3
2 and the upper extension portions 31A, 32A
Can form the base of landings 4A and 4B,
Installation work can be facilitated.

Then, the landings 4A and 4B are connected to the girder 3
Since the first and second upper portions 31A and 32A are provided on the upper extension portions 31A and 32A, there is no need to erection of pillars for supporting the landings 4A and 4B, and the upper extension portions 31A and 32A are connected to the landings 4A and 4B. Since it can also be used as a constituent member, the structure of the landings 4A and 4B can be simplified and the number of members can be reduced. Further, since the landing lower stage 4A can be formed only by mounting the support member 45 between the slab beams 31 and 32 and mounting the floor member 403 thereon, the installation work can be facilitated.

Further, a receiving member 41 is attached to the partition wall 71, and the receiving surfaces 42A and 43A of the receiving member 41 are mounted.
Since the upper-side extension portions 31A and 32A are placed on the upper side, the upper-stage extension portions 31A and 32A are placed on the placement surfaces 42A and 43.
In addition to being able to perform the positioning of the slabs 31 and 32 on the A, and maintaining the positioned state, the positioning operation and the fixing operation can be facilitated.

Further, since the landings 4A and 4B are formed with steps, the inclination angle of the entire staircase 1 can be reduced, so that a staircase which can be easily moved up and down can be obtained. Further, the landing lower stage 4A and the landing upper stage 4B are provided with an upper extension 31A,
Since the upper frame 402 is laminated on the lower frame 401 provided on the upper frame 32A, stepped landings 4A and 4B can be formed with a simple structure, and the upper frame 4 can be formed.
The step can be easily adjusted simply by changing the height of 02.

Since the lower end portions of the slab beams 21 and 22 of the upper part of the stairs 2 are fixed to the connecting member 48 forming the upper frame portion 402, there is no need to provide a wall for supporting the upper part of the stairs 2. Therefore, the entire structure of the folding staircase 1 can be simplified and the width of the elevating part can be sufficiently secured.

Further, since the lower extension portions 31B, 32B of the slab beams 31, 32 are housed and fixed inside the lower beam 83, the lower tiers inserted into the lower beam 83 during installation are provided. Sasara girder 31, 3 with side extension portions 31B, 32B as fulcrums
2 can be rotated to abut against the partition wall 71 and the lower extension 31 can be rotated and positioned until it is positioned.
B, 32B does not shift, so the sara spar 3
The installation work of 1, 32 can be facilitated.

Since the handrail panel 5 fixed to the slabs 22 and 31 does not need to support the load on the upper and lower steps 2 and 3, it can be formed relatively thin.
The handrail can be provided without substantially reducing the width of the stairs 1. Furthermore, the handrail panel 5 is a
Since the height dimension is larger than that of the handrail panel 5, the rigidity against the vertical load can be obtained even if the thickness is small. 31 can be reinforced. Therefore, if the thickness of the girder beams 22 and 31 is set in consideration of the reinforcing effect of the handrail panel 5, the girder girder 2 can be secured while ensuring sufficient strength.
Since the thicknesses of the steps 2 and 31 can be reduced, the effective width of the staircase 1 can be further expanded.

Further, since the handhold portion 6 is attached along the upper end surface of the handrail panel 5, the handrail does not protrude in the horizontal direction, so that the effective width of the staircase 1 can be increased. Furthermore, since the handhold 6 does not interfere with the cloth on the surface (side surface) of the handrail panel 5, the cloth can be easily stretched over the entire surface of the handrail panel 5.

The handrail 6 has a receiving member 61 fixed to the upper end surface of the handrail panel 5, and a cap member 62 which is fitted into the receiving member 61 so as to cover the receiving member 61. Therefore, the receiving member 61 is fixed to the fastening member 63.
Thus, even if the fastening member 63 is fixed to the handrail panel 5, the fastening member 63 can be reliably covered with the coping member 62, so that a good appearance can be secured. Can be attached.

Further, the handrail panel 5 includes a frame 50.
And the surface material 52 made of plywood stretched on both sides of the frame 50, so that the handrail panel 5 can have excellent strength, so that the reinforcing effect of the girders 22, 31 can be sufficiently obtained.

Since the handrail panel 5 is attached to each of the opposing surfaces of the facing girders 22 and 31 between the upper staircase 2 and the lower staircase 3, the handrails of the upper staircase 2 and the lower staircase 3 are provided. 6 can be easily continued.

It should be noted that the present invention is not limited to the above-described embodiment, but includes other configurations that can achieve the object of the present invention, and also includes the following modifications.
That is, in the above-described embodiment, the landings 4A and 4B are formed with steps, but the landing may be formed flat by omitting the upper frame portion 402. In this case, Sasara girder 2
The lower end portions of the lower frame portions 1 and 22 are supported by the support members 45 of the lower frame portion 401.
Should be fixed to.

In the above embodiment, the upper extending portions 31A and 32A of the slabs 31 and 32 are fixed to the partition wall 71, but are fixed to the intermediate beams 84 provided in the building unit 8 as shown in FIG. You may. An extension 21 is provided at the lower end of a pair of sasara girders 21 (only one is shown) of the upper part 2 of the stairs.
B, and the lower extension 21B may be fixed to the intermediate beam 84.

In the above embodiment, the handle portion 6 is provided along the upper end surface of the handrail panel 5. However, the thickness of the handrail panel is sufficiently thinner than that of a conventional wall, so that the handle portion is formed by hand. Even if it is provided on the side surface of the sliding panel, the effect of expanding the width of the stairs can be obtained.

In the above embodiment, the slab girder supporting the step board at both ends in the width direction has been described. However, as shown in FIG. It can also be applied to stairs with a structure where the riser is omitted and supported by the part. At this time, in the receiving material 41, the mounting surface 41A for receiving the pair of slabs 31 and 32 may be shared, and in order to receive the slabs 31 and 32 in a stable state, the adjusting member 411 is provided and mounted. The surface 41A may be extended. In such a staircase, the frame member 451 is formed along the partition wall 72 in order to frame the lower frame portion 401 in a rectangular shape.
And a down frame 452 covering the support member 45
Is provided.

The lower ends of the slabs 31 and 32 may be directly fixed to the floor 80. In this case, a block-shaped mounting member 87 is fixed to the floor 80 in advance as shown in FIG. At the same time, concave portions 31D, 32D to be fitted to the mounting members 87 are formed on the lower end surfaces of the slab beams 31, 32, and the concave portions 31D, 32D of the slab beams 31, 32 are set at the time of installation.
32D is fitted to the mounting member 87 and positioned, and is fixed to the receiving member 87 by a fastener 88 such as a screw or a nail. According to this, the positioning and fixing of the girders 31 and 32 can be easily performed. In addition, the connecting portion between the slab beams 31 and 32 and the mounting member 87 may be covered with a cover material 89, whereby the fastener 88 is not exposed, so that a good appearance can be obtained.

Further, the mounting member 87 is not limited to a block-shaped member. For example, as shown in FIG. 12, the mounting member 871 is provided with a locking piece 871B on a fixing plate 871A fixed to the floor surface 80A. The mounting member 871 may be provided with a back plate 8 as shown in FIG.
7C may be provided so that the girders 31 and 32 can be made to follow.

The stairs to which the present invention is applied are not limited to the 180-degree folded stairs of the above embodiment, and may be, for example, right-angled folded stairs.
It may be a straight staircase. In short, any type of staircase may be used as long as it is a staircase having a structure in which a stepboard is supported by a slab.

In the embodiment described above, the stairs incorporated in the unit-type building have been described. However, the type of the building is not limited to this. For example, the stairs in the building constructed by the conventional construction method may be used. The present invention is also applicable to stairs in a building constructed by a panel method.

[0055]

As described above, according to the present invention,
In a staircase structure for incorporating a stair with a girder in a building, the upper end of the girder and the lower end of the girder are fixed to the wall and floor, respectively. Therefore, it is not necessary to provide a wall for supporting the stairs on the side of the slab. Therefore, no space is required for the wall, so that the internal space of the building can be effectively used and the width of the stairs can be sufficiently secured. In addition, since the sasa spar is formed in a substantially V-shape with a horizontal upper tier, even if the sasa spar is fixed against the wall, it is not To the upper floor through the floor provided in Furthermore, since the foundation portion of the floor can be formed by the upper-side extending portion only by installing the sasara girder, the installation work can be simplified.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the steps of the embodiment.

FIG. 3 is a perspective view for explaining a mounting structure at the lower part of the stairs of the embodiment.

FIG. 4 is an exploded perspective view illustrating the mounting structure of the lower part of the stairs of the embodiment.

FIG. 5 is an exploded perspective view for explaining a landing structure according to the embodiment.

FIG. 6 is a perspective view showing the lower part of the stairs and the landing in the embodiment.

FIG. 7 is a sectional view showing the handrail panel and the handrail of the embodiment.

FIG. 8 is a cross-sectional plan view showing the handrail panel at the folded portion of the stairs of the embodiment.

FIG. 9 is a diagram showing another staircase structure of the present invention.

FIG. 10 is a perspective view showing another staircase to which the present invention is applied.

FIG. 11 is an exploded perspective view showing a lower end of a sasara spar of the other stairs.

FIG. 12 is a perspective view of a receiving member for receiving the slab of the other stairs.

FIG. 13 is a perspective view of another receiving member that receives the slab of the other stairs.

[Explanation of symbols]

 1 stairs 4A, 4B landing 5 handrail panel 6 handle part 8, 9 building unit 11 step board 21, 22, 31, 32 sasara girder 21A, 31A, 32A upper section extension 21B, 31B, 32B lower section extension 41 receiving member 42A, 43A mounting surface 45 supporting member 47 upper supporting member 48, 49 connecting member 50 frame 51 core member 52 surface member (plywood) 61 receiving member 62 shed member 71, 72, 73 partition wall 80 floor 83 lower beam 401 Lower frame part 402 Upper frame part 403,404 Floor surface material

Claims (6)

[Claims] 1. A staircase structure for incorporating a stair provided with a slab in a building, wherein the slab is a diagonal girder extending in a direction of inclination of the stairs;
The diagonal girder is formed in a substantially elliptical shape with an upper-stage extension extending horizontally from the upper end of the diagonal girder, and the lower end of the sasara girder is fixed to the floor in the building. The staircase structure, wherein the upper-stage-side extending portion is fixed in a state where the upper-stage-side extending portion abuts against a wall in the building. 2. The staircase structure according to claim 1, wherein the pair of sasara girders are arranged side by side, and a landing is provided on an upper-stage extending portion, and the landing is located between the pair of sasara girders. A support member that is bridged so that the upper surface is flush with the upper surface of the upper extension portion,
A staircase structure comprising: the support member; and a floor member attached across the upper surfaces of the upper-side extension portions. 3. The staircase structure according to claim 2, wherein a receiving member having a mounting surface for receiving an upper-side extension of the sasara girder is attached to the wall, and the upper-stage extension is provided. A staircase structure, wherein an end of the portion is mounted on the mounting surface. 4. The staircase structure according to claim 3, wherein a floor surface material for a landing lower stage and a step having a height dimension larger than the floor surface material are formed on the receiving material and the support material. A staircase structure, wherein an upper support member is provided side by side, a floor material for an upper landing is mounted on the upper support member, and the landing is formed stepwise. 5. The staircase structure according to claim 4, wherein the receiving member and the supporting member are extended so as to protrude from the pair of slab beams, and the upper supporting member is formed of the receiving member and the supporting member. Two connecting members are bridged between the upper supporting members, and a connecting member is provided between the upper supporting members, and the connecting member has a lower part of a lower part of the saspar girder forming a staircase extending upward from the landing. A staircase structure characterized by fixed ends. 6. The staircase structure according to any one of claims 1 to 5, wherein the sasara girder has a lower extension extending horizontally from a lower end of the diagonal girder. The floor of the building is configured to include a lower beam made of a channel material having a U-shaped cross section, and the lower extension of the sasara girder is housed and fixed inside the lower beam. A staircase structure characterized by: