JPH10280549A - Stair well construction of building and auxiliary floor member of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide stair well construction of a building capable of heightening the height of a ceiling in start positions of stairs for the first to the second floor without narrowing a well area in a staircase and an auxiliary floor member. SOLUTION: Stair well construction of a building is used for a staircase 12 of a void area wherein two up and down stairs 15 and 16 are set, start positions S and S' of both stairs 15 and 16 are separated from the well area to the insides by prescribed dimension, a space between the star position S' and the circumference of the void area is filled with an auxiliary floor member 20. Since the auxiliary floor member 20 is only overhung on the well area of the staircase 12, the height of a ceiling in the start position of the first stair 15 can be heightened without narrowing the well area of the staircase 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stairwell structure of a building in which two vertical stairs are provided in a building and an auxiliary floor member of the building.

[0002]

2. Description of the Related Art For example, stairs provided in a two-story, three-story unit-type building constructed by combining a plurality of box-shaped building units are provided in a staircase room in the building. Especially,
In the case of a three-storey house, two
Stairs for the first to third floors are often installed. That is,
The staircase is provided at the same position in the vertical direction of the building, that is, has a stairwell structure. In many cases, the structure of each of these steps is almost the same.

[0003]

By the way, the floor of the first floor is usually covered with a floor material over the entire surface. The start positions of the stairs for the first and second floors are located at predetermined distances inward from the blow-by area for stepping out of the stairs. Therefore, on the first floor, the floor material is stretched on the stepped portion. However, if the same structure as described above is to be adopted for the stairs for the second and third floors, a stepping floor must be provided on the second floor, and in that case, the ceiling on the first floor is also provided. Therefore, the ceiling part is protruded inward from the blow-by area in the size of the floor for stepping out, and 1
On the first floor, the height of the ceiling at the starting position of the stairs for the first and second floors becomes low, and the overhang area is narrowed by the overhang from the area around the atrium area of the second floor and the first floor ceiling. There is a problem.

SUMMARY OF THE INVENTION An object of the present invention is to provide a stairwell structure of a building and an auxiliary floor member of the building in which the ceiling height at the start position of the first and second floor stairs can be increased without narrowing the stairwell area. It is in.

[0005]

The stairwell structure of a building according to the first invention of the present invention will be described with reference to the drawings. As shown in FIG. 1, two vertical stairs 15 and 16 are provided. It is the stairwell structure of the building, and the first floor 2A of the building 1
The floor is a floor with a floor material 10 stretched over the entire surface.
Is formed, and the starting position S of the lower staircase 15 is the staircase room 1
2, the upper stairs 16 are installed at the same position in the vertical direction as the lower stairs 15 on the second floor 3A, and the start position S ′ of the upper stairs 16 and the atrium area Auxiliary floor member 2 between the surroundings
It is characterized by filling with zeros.

In the above, the building to which the stairwell structure is applied is not limited to a unit-type building constructed by combining a plurality of building units, but may be a building by a so-called panel method. Further, the upper and lower two-step stairs may be linear stairs or turning stairs, but are preferably structurally the same. The shape of the blow-by area may be any shape as long as it corresponds to the shape of the steps. Further, the distance between the start position of each of the upper and lower stairs and the periphery of the blow-by area is preferably substantially the same, and this portion serves as a stepped portion of the stairs. In addition, the auxiliary floor member may be formed by a single plate member attached to a support member attached to a structural material of a building, for example, or a joist member or the like and a plate member serving as a step-out portion are integrated. Such a shape may be used. The length of such an auxiliary floor member is preferably substantially equal to the width of each stair, and the width of the auxiliary floor is preferably about the width of a tread of a stair.

In the present invention, since the space between the start position of the upper stairs and the periphery of the stairwell is filled with the auxiliary floor member, only the auxiliary floor member projects in the stairwell area. Thereby, the ceiling height at the start position of the stairs for the first and second floors can be increased without narrowing the stairwell area.

As shown in FIG. 1, a stairwell structure of a building according to a second invention of the present invention combines a building of the first invention with a plurality of box-shaped building units 2 to 4 produced in advance at a factory. The building units 2 to 4 each have a lower beam 8 along the lower edge, and a blow-through area is formed along the lower beam 8 of each of the building units 2 to 4. Are supported by the lower beam 8 of the upper-floor building unit 2A.

According to the present invention, since the auxiliary floor member is supported by the lower beam of the upper-floor building unit, the structure becomes stable, and the starting position of the first-floor stairs arranged in the lower-floor building unit is determined. Ceiling height can be increased.

As shown in FIG. 2, the stairwell structure of a building according to the third invention of the present invention has a U-shaped corner portion 12A in the opening area of the first and second inventions. It is characterized in that three sides are connected to the U-shaped corner portion 12A. In the present invention,
Since the auxiliary floor member is connected to the U-shaped corner portion on three sides, the auxiliary floor member has sufficient strength.

An auxiliary floor member for a building according to a fourth aspect of the present invention is:
Referring to the drawings, as shown in FIGS. 1 and 3, two stairs 15 and 16 at the top and bottom of a stairwell 12 in an atrium area formed over upper and lower floors of a building 1 have respective start positions S, S ′ is an auxiliary floor member 20 of the building that fills the space between the start position S ′ of the upper staircase 16 and the periphery of the stairwell, of the stairwell structure of the building installed at a predetermined distance from the periphery of the stairwell. The side members 21 arranged on both sides in the width direction of the stairs 16, the joists 22A and 22B connecting the side members 21 to each other, and the stair receiving member 25 stretched on the upper surfaces of these joists 22A and 22B. 2A on both sides with side material 21
(8 ').

In the above, it is preferable that the width of the side member and the width of the stair receiving member are substantially the same as the width of the tread of each stair, and the length of the stair receiving member and the joist is determined by the length of each stair. It is preferable that the width is the same as the width. In the present invention as described above, since the space between the start position of the upper stairs and the periphery of the blow-by area is filled with the auxiliary floor member,
Only the auxiliary floor member protrudes into the stairwell area, thereby making it possible to increase the ceiling height at the start position of the stairs for the first floor without narrowing the stairwell area. Since the auxiliary floor members are assembled by being integrated with side members, joists and the like, the strength is increased, and since both sides are supported by the building with the side members, secure mounting is achieved.

An auxiliary floor member of a building according to a fifth aspect of the present invention is:
As shown in FIG. 3, there are a plurality of joists of the fourth invention, one of them 22A is arranged along the longitudinal edge of the stair receiving member 25, and
Is supported by the building 2A (8) via the. In the present invention, the joist having the stair receiving member attached to the upper surface may be supported by a beam or the like, and the work such as nailing from the joist side is facilitated, and the working efficiency is improved.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the building to which the stairwell structure of the building of the present embodiment is applied includes a plurality of first-floor building units 2, second-floor building units 3, and third-floor building units 4 that are produced in advance in a factory. This is a unit-type building 1 constructed by combining roofs or the like made of roof panels or the like that are not used on site.

As shown in FIG. 4, each of the building units 2 to 4 has four pillars 6 erected at four corners, and four pillars 6 connecting the upper ends of the pillars 6 and the lower ends thereof. Upper beam 7,
A skeleton 9 having a lower beam 8;
, Ceiling and floor surface material 10, inner and outer walls, etc.
It is formed in a substantially box shape.

At predetermined positions of building units 2A and 3A, 3A and 4A which are vertically overlapped in the unit building 1,
As shown in FIG. 2 and FIG.
A staircase room 12 is provided on the third floor, which is a stairwell having a substantially square-shaped open space formed by cutting out a corner at one corner. The first-floor unit 2A of the staircase room 12 has lower stairs of the first to second floors. The first stairs 15 for floors are provided in the second floor unit 3A, and the second stairs 16 for the second and third floors, which are upper stairs, are respectively installed. In addition, the adjacent part of the corner of the staircase 12 is a U-shaped corner portion 12A. The first step 15 and the second step 16 are round steps having substantially the same structure, and are arranged at the same position in the vertical direction.

The first staircase 15 is installed on the floor 10 of the first-floor building unit 2A at a position separated from one side surface of the staircase room 12 by a predetermined distance inside, with a start position S arranged. The separated portion having a predetermined size is a stepped portion A of the stairs. As described above, the second staircase 16 is also provided at substantially the same position in the vertical direction as the first staircase 15, but the step A between the start position S 'of the second staircase 16 and one side surface of the staircase room 12 is described. The auxiliary floor member 20 is provided in the gap corresponding to, and the auxiliary floor member 20 fills the gap, and the auxiliary floor member 20 is a stepped portion A ′ on the second floor.

The auxiliary floor member 20 has side members 21 provided on both sides in the width direction of the stairs 16.
Are formed to have a length substantially the same as the width of the step board 17 of the stairs. The piece 23 is attached to the groove-shaped piece 23 by, for example, an air pin or the like. The piece 23 is fixed by welding or the like to the intermediate beam 8 'bridged between the lower beams 8 of the building unit 3A. It has become.

Two joists 22A and 22B are stretched between the side members 21. These joists 22A and 22B have different height dimensions, the higher joist 22A is arranged on the lower beam 8 side of the building unit 3A, and the shorter joist 22B is arranged ahead of the stairs 16 in the ascending direction. Have been. And these joists 22A, 2
2B are arranged at predetermined intervals in the horizontal direction. The height of the higher joist 22A is substantially the same as the height of the lower beam 8.

A stair receiving member 25 is stretched on the upper surfaces of the joists 22A and 22B. The step receiving member 25 has a step width, that is, a length dimension over the two side members 21,
It is formed of a plate member having a width dimension extending between the joists 22A and 22B, that is, a length dimension of the step height 17 and the like, and a portion of the stair receiving member 25 forms a stepped portion A ′ for the second stair 16. Will be. The stair receiving member 25 is connected to the floor member 10 'of the second floor unit 3A.

On the other hand, a bracket 26 having a groove-shaped cross section and the same length as the joist 22A is joined to the lower beam 8 of the building unit 3A by welding or the like, and this bracket 26 is the same as the joist 22A. Mounting plate 2 of flat size
7 is fixed by, for example, an air pin. Then, of the joists 22A and 22B integrated with the two side members 21, the higher joist 22A is pressed against the bracket 26 and the mounting plate 27 against the mounting plate 27, and, for example, an air pin or the like is hit. To be attached.

Here, the side member 21 and the joist 2
The auxiliary floor member 20 includes 2A, 22B, a stair receiving member 25, a piece 23, a mounting plate 27, and a bracket 26. The riser plate 18 that forms the start portion S ′ of the second staircase 16 is connected to the auxiliary floor member 20 together with the stepboard 17, and the second staircase 16 is
Is provided. In addition, as shown in FIG.
The face material 30 such as a gypsum board at the lower end face of the
It is provided to extend from the front of 2B (toward the stairs 16 in the ascending direction) to the lower beam 8 side.

Next, the operation of the present embodiment will be described. A bracket 26 is fixed to a predetermined lower beam 8 of the second-floor building unit 3A having the staircase 12, and the bracket 26 is further fixed.
Attach the mounting plate 27 to. Further, the side member 21, the joists 22A and 22B, the stair receiving member 25 and the piece 2
3 are integrated in advance.

Next, the bracket 26, the mounting plate 27
To the piece 2 attached to the side member 21 while pressing the joist 22A such as the integrated stair receiving member 25
After the 3 is inserted into the intermediate beam 8 'and left and right alignment is performed, an integrated stair receiving member 25 and the like are attached to the lower beam 8 by, for example, driving an air pin or the like from the surface of the joist 22A. Then, the positioned piece 23 is attached to the intermediate beam 8 ′.
The auxiliary floor member 20 is fixed to the second-floor building unit 3A by welding or the like. Subsequently, the start position S 'is connected to such an auxiliary floor member 20, and the second staircase 16 is attached to the second-floor building unit 3A.

A first staircase 15 is previously attached to the first-floor building unit 2A.
４4 are brought into the site and combined according to the procedure to build a unit-type building 1.

According to this embodiment, the following effects can be obtained. The second stairs 16 for the second and third floors are the first stairs for the first and second floors.
The stairs 16 are arranged at the same position in the vertical direction, and the start position S ′ is apart from the stairwell area of the staircase room 12, but since the auxiliary floor member 20 is provided in this gap, the first floor building unit There is no need to provide a ceiling, thereby eliminating the protrusion of the ceiling to the side of the staircase, and without narrowing the stairwell 12
The ceiling height at the start position S of the first staircase 15 on the first floor can be increased. The auxiliary floor member 20 has a U-shaped corner 12A.
It is fixed to the lower beam 8 of the building unit 3A with the joist 22A,
Further, since the intermediate member 8 'is fixed to the piece 23 by the side member 21 and is fixed to three sides, it is reliably supported and has sufficient strength. Attachment of the stair receiving member 25 and the like is performed by pressing the attachment plate 27 against the bracket 26 and the attachment plate 27 fixed to the lower beam 8 of the second-floor building unit 3A, and attaching the piece 23 attached to the side member 21 to the intermediate beam 8 '. Then, after the left and right alignments are performed, an air pin or the like may be driven in from the surface of the joist 22A and attached, so that the attaching work is easy and the position adjustment is easy. The front side and lower end of the joist 22B are covered with the gypsum board 30 covering the lower end of the second staircase 16, so that they are not exposed and the appearance does not deteriorate.

The present invention is not limited to the above embodiment, but may be modified as follows as long as the object of the present invention can be achieved. That is, in the embodiment, the bracket 26 is connected to the joist 22.
Although the length is substantially the same as the length of A, the invention is not limited to this, and a plurality of pieces having the same shape as the piece 23 may be arranged at predetermined intervals. Conversely, the piece 23 may be a continuous material having the same length as the side material 21. And, in such an embodiment, the same effects as those of the first embodiment can be obtained.

In the above embodiment, the joist 22A,
Although 22B has different height dimensions, the height is not limited to this, and both 22A and 22B may have the same height. And, in such an embodiment, the same effects as those of the first embodiment can be obtained.

[0029]

As described above, according to the stairwell structure of the building of the present invention, the space between the start position of the upper staircase and the periphery of the stairwell is filled with the auxiliary floor member, so that the stairwell area of the staircase room is filled. Only the auxiliary floor member is overhanging, so that the ceiling height at the start position of the stairs for the first floor can be increased without narrowing the stairwell area.

Further, according to the auxiliary floor member of the building of the present invention, since the space between the start position of the upper stairs and the periphery of the stairwell is filled with the auxiliary floor member, only the auxiliary floor member protrudes into the stairwell area. As a result, the ceiling height at the start position of the stairs for the first floor can be increased without narrowing the stairwell area. In addition, since the auxiliary floor member is assembled and integrated with side materials, joists, and the like, the strength is increased, and furthermore, since both sides are supported by the building with the side materials, secure attachment is achieved.

[Brief description of the drawings]

FIG. 1 is an overall side view showing a unit-type building according to an embodiment of the present invention.

FIG. 2 is an overall plan view showing a second-floor building unit having a staircase according to the present embodiment.

FIG. 3 is an overall perspective view showing an auxiliary floor member of the building according to the embodiment.

FIG. 4 is an overall perspective view showing a framework of a building unit constituting the unit building of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Unit type building 2A 1st floor building unit with staircase 3A 2nd floor building unit with staircase 8 Lower beam 10 Flooring material 12 Staircase room 12A Corner 15 First staircase for the 1st or 2nd floor as lower staircase 16 2nd stairs for the 2nd to 3rd floor as upper stairs 20 Auxiliary floor member of building 21 Side material 22A, 22B constituting auxiliary floor member 22J, joist material constituting auxiliary floor member 25 Stair receiving member constituting auxiliary floor member A, A 'Stepping out part S, S' Start position

Claims (5)

[Claims] 1. A stairwell structure for a building in which two upper and lower stairs are installed, wherein the floor of the first floor of the building is an entire floor with a floor material stretched over the entire surface, and at least one of the entire floors is provided. A staircase of a stairwell area is formed above the upper part, a start position of the lower staircase is installed inside the staircase at a predetermined distance inward from the stairwell area, and the upper staircase is located on the lower floor of the second floor of the building. A stairwell structure for a building, which is installed at the same position in the vertical direction as the stairs, and fills a space between the start position of the upper staircase and the periphery of the stairwell with an auxiliary floor member. 2. The stairwell structure of a building according to claim 1, wherein the building is a unit-type building that is constructed by combining a plurality of box-shaped upper and lower floor building units produced in advance in a factory on site, The building unit has a lower beam along a lower edge, the atrium area is formed along the lower beam of each of the building units, and the auxiliary floor member is supported by the lower beam of the upper floor building unit. A stairwell structure of a building characterized by the following. 3. The stairwell structure of a building according to claim 1, wherein the blow-by area has a U-shaped corner portion, and the auxiliary floor member is connected to the U-shaped corner portion on three sides. The stairwell structure of a building characterized by the fact that it is. 4. A staircase of a building in which a double staircase is provided at a start position of a staircase in a stairwell area formed over upper and lower floors of a building at a predetermined distance from the periphery of the stairwell area. An auxiliary floor member of a building that fills a space between a start position of the upper stairs and a periphery of the stairwell of a stairwell structure, and side members arranged on both sides in the width direction of the stairs, and these side members are joined to each other. An auxiliary floor member for a building, comprising: a joist; and a stair receiving member stretched over the upper surface of the joist, and both sides of the joist are supported by the building. 5. The auxiliary floor member of a building according to claim 4, wherein there are a plurality of the joists, one of which is arranged along a longitudinal edge of the stair receiving member,
An auxiliary floor member for a building, which is supported by the building via the joist.