JP2025039053A - Stairs - Google Patents

Abstract

To provide a staircase which can reduce restrictions on the use of a space below a floor part of a staircase landing or below a floor part of an open corridor and can improve the design of a building.SOLUTION: In a staircase where a column device 1 supports a floor part of a staircase landing or a floor part of an open corridor, the column device 1 comprises: one column 1A connected to one end side in a longitudinal direction of the floor part; a horizontal support member provided on an upper end side of the one column 1A and extending along a longitudinal direction of an underside of the floor part to support the underside of the floor part; and the other column connected to the other end side in the longitudinal direction of the floor part; and a horizontal support member provided on an upper end side of the other column and extending along the longitudinal direction of the underside of the floor part to support the underside of the floor part. The horizontal support member is a cross member 1B provided over the one column 1A and the other column 1A which are provided at an interval.SELECTED DRAWING: Figure 4

Description

The present invention relates to a staircase in which the landing floor or the open corridor floor is supported by a column device.

For example, a known staircase in which the floor of the landing is supported by a pillar device has a pillar device that includes multiple pillars connected to the part of the floor close to the staircase side, and multiple pillars that are arranged to support from below the part of the floor opposite the staircase side (see Patent Document 1).

Japanese Patent Application Publication No. 6-26159

However, in a staircase in which the landing floor is supported by the above-mentioned pillar device, the pillar device is configured with four pillars that support the landing floor at four points around the periphery of the floor, and there are problems with the presence of many pillars below the floor, such as limiting the use of the space below the floor and compromising the design of the building.

The present invention aims to solve the above problems by providing a staircase that is less susceptible to restrictions on the use of the space below the floor of a staircase landing or an open corridor, and that also improves the design of the building.

The staircase of the present invention is a staircase in which the floor portion of a landing or an open corridor is supported by a column device, and the column device comprises one column connected to one end side of the longitudinal direction of the floor portion, a horizontal support member provided on the upper end side of the one column and extending along the longitudinal direction of the underside of the floor portion to support the underside of the floor portion, and the other column connected to the other end side of the longitudinal direction of the floor portion, and a horizontal support member provided on the upper end side of the other column and extending along the longitudinal direction of the underside of the floor portion to support the underside of the floor portion, and is characterized in that the horizontal support member is a cross member provided across the one column and the other column which are provided at a distance in the longitudinal direction of the floor portion.
The staircase of the present invention makes it possible to reduce restrictions on the use of the space below the floor of the staircase landing and below the floor of the open corridor, and also improves the design of the building.
The staircase is a return staircase provided outdoors or indoors, and the floor portion of the landing of the return staircase includes a floor understructure and a floor constructed on the floor understructure. The floor understructure includes one side girder located on the side closer to the staircase portion of the return staircase, another side girder provided so as to face the one side girder in parallel with a gap therebetween, a one-end beam connecting one end side of the one side girder in the extension direction and one end side of the other side girder in the extension direction, and a one-end beam connecting the other end side of the one side girder in the extension direction and the other end side of the other side girder in the extension direction. the outer rafter of the lower staircase part and the one-end beam of the floor understructure structure are constructed as one piece, and the outer rafter of the upper staircase part and the other-end beam of the floor understructure structure are constructed as one piece, and the column device is characterized in that a cross member is positioned below the floor understructure structure, connecting the upper end side of one column to the one-end beam, and connecting the upper end side of the other column to the other-end beam.
The staircase is a return staircase provided outdoors or indoors, and the floor portion of the landing of the return staircase includes a floor understructure and a floor constructed on the floor understructure. The floor understructure includes one side girder located on the side closer to the staircase portion of the return staircase, another side girder provided so as to face the one side girder in parallel with a gap therebetween, a one-end beam connecting one end side of the one side girder in the extension direction to one end side of the other side girder in the extension direction, and an extension beam of the one side girder. The floor support structure includes an other-end beam that connects the other end of the other side girder in the longitudinal direction and the other end of the other side girder in the extension direction, and a floor joist that connects the one side girder and the other side girder. The one side girder is divided into a portion corresponding to a lower staircase portion and a portion corresponding to an upper staircase portion, and the one side girder is provided with one central reinforcing member and the other central reinforcing member that are parallel to the one-end beam and the other-end beam on the center side. The outer side of the lower staircase portion of the turn-back staircase and the one-end beam of the floor support structure are integrally formed. and the outer rafter of the upper staircase portion of the folded staircase and the other end beam of the floor base structure are formed as one piece, the inner rafter of the lower staircase portion and one of the central reinforcing members are formed as one piece, and the one piece is connected to the severed end of the portion corresponding to the lower staircase portion of one side girder and the one piece is connected to the other side girder, the inner rafter of the upper staircase portion and the other central reinforcing member are formed as one piece, and the one piece is connected to the severed end of the portion corresponding to the upper staircase portion of one side girder and the one piece is connected to the other side girder, and the column device is characterized in that a cross member is positioned below the floor base structure and the cross member is connected to one central reinforcing member and the other central reinforcing member, the upper end side of one column is connected to the one end beam, and the upper end side of the other column is connected to the other end beam.
It is also characterized in that the joists and the cross members of the column device are connected to each other.
The staircase of the present invention maintains the strength of the floor of the landing, is less likely to be restricted in the use of the space below the floor of the landing, and improves the design of the building.

1A is a perspective view showing the floor section and the pillar device separated, and FIG. 1B is a perspective view showing the floor section supported by the pillar device. 1A is a plan view of a turn-around staircase, FIG. 1B is a front view, and FIG. 1C is a right side view (upper side omitted). 2(a) is a view taken along the line A-A in FIG. 2(a), FIG. 2(b) is a view taken along the line B-B in FIG. 2(a), and FIG. 2(c) is a view taken along the line C-C in FIG. 2(a). FIG. 2 is a perspective view showing the framework structure of a turn-around staircase. (a) is a plan view of the spiral staircase, (b) is an A-A view of (a), (c) is a B-B view of (a), and (d) is a C-C view of (a). FIG. 2 is a perspective view showing the framework structure of a turn-around staircase.

EMBODIMENT 1
As shown in Figures 1 to 4, the staircase 3 of embodiment 1 is a staircase in which the floor section 2 of the landing 5 of the staircase 3 is supported by a column device 1, and the column device 1 is a column device including, for example, one column 1A connected to one end side of the longitudinal direction of the floor section 2, the other column 1A connected to the other end side of the longitudinal direction of the floor section 2, and a cross member 1B arranged across the upper ends 1t, 1t of two columns 1A, 1A arranged at an interval corresponding to the longitudinal length interval L of the floor section 2 and supporting the underside of the floor section 2, i.e., a column device configured in a gate shape.
The means for connecting each column 1A, 1A to the cross member 1B may be, for example, welding or mechanical connecting means such as gusset plates and bolts and nuts.
According to the staircase 3 in which the floor section 2 of the landing 5 of the staircase 3 is supported by a pillar device 1, the number of pillars is reduced and, at the time of design, it is possible to arbitrarily set the mounting positions of the pillars 1A, 1A relative to the short side direction (front-to-back direction) of the floor section 2.
Therefore, restrictions on the use of the space below the floor portion 2 of the landing 5 of the stairs 3 can be reduced, and the design of the building can be improved.

Next, an outdoor turn-around staircase having a landing floor supported by the pillar device 1 of the first embodiment described above will be described.
In this specification, the terms front, rear, inside, and outside are defined as the directions shown in FIGS.
Although FIG. 3 and FIGS. 5(b) to (d) are cross-sectional views, cross-sectional hatching has been omitted.

As shown in FIG. 2 , the outdoor turn-around staircase 3 according to the first embodiment is, for example, a staircase having a steel frame structure, in which a stair section 4 turns around via a landing 5 .
In other words, the return staircase 3 is configured such that the staircase portion 4 is composed of a lower staircase portion 4A and an upper staircase portion 4B connecting the lower floor and the upper floor, and the landing 5 is provided between the lower staircase portion 4A and the upper staircase portion 4B.
For example, the return staircase 3 is configured such that the lower staircase section 4A extends diagonally upward from the lower floor to reach the landing 5, then turns around at the landing 5 and the upper staircase section 4B extends diagonally upward in the opposite direction to the inclination of the lower staircase section 4A to reach the open corridor 6 on the upper floor.

The stair section 4 (lower stair section 4A and upper stair section 4B) of the return staircase 3 is composed of a pair of left and right rafters 40, 40, a step component part 41 provided between the pair of left and right rafters 40, 40, and a handrail 42 provided to rise up from the rafters 40.
The beam 40 is made of long material, such as flat bars or channel steel.
The step component 41 is composed, for example, of a plurality of treads 43, 43... installed so that their plate surfaces form a horizontal plane, and a plurality of riser plates 44, 44... installed so that their plate surfaces form a vertical plane (see Figure 2 (c)).

The landing 5 is configured to include a floor portion 2 and a handrail 42.
The floor section 2 includes an underfloor structure 2A and a floor 2B (see FIG. 3) configured by, for example, placing a plurality of floor materials (not shown) side by side on the underfloor structure 2A.

The floor understructure structure 2A comprises one side girder 21 located closer to the staircase portion 4, the other side girder 22 arranged parallel to and facing the one side girder 21 at a distance, a one-end side beam (end beam) 23 connecting one end side of the extension direction of the one side girder 21 to one end side of the extension direction of the other side girder 22, an other-end side beam (end beam) 24 connecting the other end side of the extension direction of the one side girder 21 to the other end side of the extension direction of the other side girder 22, a joist 25 connecting the one side girder 21 to the other side girder 22, and a brace material 26 connecting the one side girder 21 to the other side girder 22.
In other words, the floor understructure structure 2A comprises a one-end side beam 23 positioned at one end side of the longitudinal direction of the floor 2B, an other-end side beam 24 positioned at the other end side of the longitudinal direction of the floor 2B, a one-side girder 21 connecting one end side of the one-end side beam 23 to one end side of the other-end side beam 24, a other-side girder 22 connecting the other end side of the one-end side beam 23 to the other end side of the other-end side beam 24, a joist 25 connecting the one-side girder 21 to the other-side girder 22, and a brace material 26 connecting the one-side girder 21 to the other-side girder 22.
Furthermore, the handrail 42 is arranged to rise from the other side girder 22, the one end beam 23, and the other end beam 24.

In this turn-back staircase 3, the outer truss 40 of the lower staircase portion 4A and one end side beam 23 of the floor underlay structure 2A are formed as a single piece, and the outer truss 40 of the upper staircase portion 4B and the other end side beam 24 of the floor underlay structure 2A are formed as a single piece.
The "integral object" in question refers to, for example, an integral object in which the stringer 40 and the one end side beam 23, or the stringer 40 and the other end side beam 24 are formed as one unit, or an integral object in which the stringer 40 and the one end side beam 23, or the stringer 40 and the other end side beam 24 are connected together by a fixing means and integrated into one unit.
As the fixing means, for example, fixing means such as welding, or mechanical fixing means such as a gusset plate and bolts and nuts, etc. are used.

The column device 1 is configured such that the cross member 1B is positioned below the joist 25 and the lower surface of the joist 25 is in contact with the upper surface of the cross member 1B, the joist 25 and the cross member 1B are connected by a connecting means, the upper end side of one column 1A is connected to the one-end beam 23 by a connecting means, and the upper end side of the other column 1A is connected to the other-end beam 24 by a connecting means.
The connecting means may be, for example, a mechanical connecting means such as a gusset plate P and bolts and nuts BN (see FIG. 3), or a connecting means such as welding.
In this way, the cross member 1B and the joist 25 are connected by the connecting means, so that noise caused by interference between the members can be suppressed.
The joists 25 are fixed to the one side girder 21 and the other side girder 22 by fixing means. As the fixing means, for example, mechanical fixing means such as bolts and nuts BN, or fixing means such as welding, is used.

In other words, the return staircase 3 of embodiment 1, in which the floor 2 of the landing 5 is supported using the pillar device 1 of embodiment 1, has a structure in which the entire floor 2 of the landing 5 is supported by the gate-shaped pillar device 1, so that the strength of the floor 2 of the landing 5 can be maintained and, compared to the conventional configuration in which pillars are provided at four locations on all four sides around the floor of the landing of the staircase, there is less restriction on the use of the space below the floor 2 of the landing 5 and the design of the building can be improved.
In addition, the outer truss 40 of the lower staircase portion 4A and one end side beam 23 of the floor underlay structure 2A are formed as a single piece, and the outer truss 40 of the upper staircase portion 4B and the other end side beam 24 of the floor underlay structure 2A are formed as a single piece, thereby further improving the strength of the floor portion 2 of the landing 5.
Furthermore, the pillar device 1 requires fewer pillars 1A, and during design, it becomes possible to arbitrarily set the mounting positions of the pillars 1A, 1A relative to the front-to-rear direction (short side direction) of the floor section 2. Therefore, it becomes possible to adjust the mounting positions of the pillars 1A, 1A of the gate-shaped pillar device 1 to optimal positions in accordance with the structure of the floor section 2, and it becomes possible to reduce restrictions on the use of the space below the floor section of the staircase landing and to improve the design of the building.
In addition, since many of the components are one piece, there are fewer assembly points required during on-site construction, improving workability.

EMBODIMENT 2
The folded staircase supported by the pillar device 1 of the above-mentioned embodiment 1 may have the configuration shown in Figs.
The configuration of the parts other than those described below is the same as that of the return staircase described in embodiment 1. Therefore, in Figures 5 and 6, the parts that are the same as or correspond to the parts shown in Figures 1 to 4 are given the same reference numerals and the description thereof will be omitted.
That is, in the folded staircase 3 of embodiment 2, as shown in Figures 5 and 6, the floor understructure structure 2X has one side girder located closer to the staircase portion 4 divided into a portion 21X corresponding to the lower staircase portion 4A and a portion 21Y corresponding to the upper staircase portion 4B, and is configured such that, at the center between the one end side beam 23 and the other end side beam 24, one central side reinforcing member 27 and the other central side reinforcing member 28 are provided which are parallel to the one end side beam 23 and the other end side beam 24.
The inner slat 40 of the lower staircase portion 4A and one of the central reinforcing members 27 are formed as a single piece, and the single piece is connected to the divided end of the portion 21X corresponding to the lower staircase portion 4A of one side girder by a connecting means, and the single piece is connected to the other side girder 22 by a connecting means.
Similarly, the inner slat 40 of the upper staircase portion 4B and the other central reinforcing member 28 are formed as a single piece, and the single piece is connected to the divided end of portion 21Y corresponding to the upper staircase portion 4B of one side girder by a connecting means, and the single piece is connected to the other side girder 22 by a connecting means.
The connecting means may be, for example, a fixing means such as welding, or a mechanical fixing means such as a gusset plate and bolts and nuts.
In addition, "integral object" refers to, for example, an integral object in which the truss beam 40 and one of the central reinforcing members 27, or the truss beam 40 and the other central reinforcing member 28 are formed integrally, or an integral object in which the truss beam 40 and one of the central reinforcing members 27, or the truss beam 40 and the other central reinforcing member 28 are connected by a fixing means and integrated into one body.
As the fixing means, for example, fixing means such as welding, or mechanical fixing means such as a gusset plate and bolts and nuts, etc. are used.

The column device 1 is configured such that the cross member 1B is positioned below the joist 25 and the lower surface of the joist 25 is in contact with the upper surface of the cross member 1B, and the joist 25 and the cross member 1B are connected by a connecting means, the upper end side of one column 1A is connected to the one-end beam 23 by a connecting means, and the upper end side of the other column 1A is connected to the other-end beam 24 by a connecting means.
Furthermore, the column device 1 is configured such that the cross member 1B of the column device 1 is positioned below the central side reinforcing member 27 and the other central side reinforcing member 28, and the lower surfaces of the central side reinforcing member 27 and the other central side reinforcing member 28 are in contact with the upper surfaces of the cross member 1B, and the column device 1 is configured such that the cross member 1B is positioned below the central side reinforcing member 27 and the other central side reinforcing member 28, and the lower surfaces of the central side reinforcing member 27 and the other central side reinforcing member 28 are in contact with the upper surfaces of the cross member 1B.
The connecting means may be, for example, a mechanical connecting means such as a gusset plate P and bolts and nuts BN (see FIG. 5), or a connecting means such as welding.
In this way, by connecting the cross member 1B and the central reinforcing members 27, 28 by the connecting means, noise caused by interference between the members can be suppressed.

According to the folded staircase of embodiment 2, the inner slat 40 of the lower staircase section 4A and one of the central reinforcement members 27 are formed as one piece, and the inner slat 40 of the upper staircase section 4B and the other central reinforcement member 28 are formed as one piece. Furthermore, the entire floor 2 of the landing 5 is supported by a gate-shaped pillar device 1, so that the same effect as the staircase of embodiment 1 can be obtained and the strength of the floor 2 of the landing 5 can be further improved.

In each embodiment, an example has been given of a staircase in which the floor section 2 of the landing 5 of an outdoor turn-around staircase 3 is supported by a pillar device 1, but the staircase of the present invention may also be a staircase in which a floor section other than the floor section of the landing of the turn-around staircase is supported by a pillar device 1.
For example, the floor of a landing of an outdoor straight staircase or spiral staircase, or the floor of an open corridor connected to the top end of an outdoor staircase, may be a staircase configured in such a way that it is supported by the column device 1.
In addition, the stairs may be configured such that the floor portion of a landing of an indoor staircase or the floor portion of an indoor open corridor is supported by the pillar device 1.

In addition, in the embodiment, a pillar device 1 configured in a gate shape is exemplified, which has two pillars 1A, 1A arranged at a distance from each other and a cross member 1B arranged between the upper ends 1t, 1t of each pillar 1A, 1A. However, the pillar device may be configured to have a pillar and a horizontal support member arranged on the upper end side of the pillar and extending horizontally along the longitudinal direction of the underside of the floor portion.
In other words, the column device supporting the floor of a staircase according to the present invention may be a column device supporting the floor of a staircase landing or the floor of an open corridor, and may be configured to include one column connected to one longitudinal end side of the floor, a horizontal support member provided on the upper end side of the one column and extending along the longitudinal direction of the underside of the floor to support the underside of the floor, and the other column connected to the other longitudinal end side of the floor, and a horizontal support member provided on the upper end side of the other column and extending along the longitudinal direction of the underside of the floor to support the underside of the floor.
The staircase according to the present invention may be a staircase whose floor is supported using a column device constituted by one column having the horizontal support member and another column having the horizontal support member.
In other words, the staircase of the present invention may be a staircase supported using a column device composed of one column equipped with the above-mentioned horizontal support member and another column equipped with the above-mentioned horizontal support member, instead of the staircase column device 1 described in embodiments 1 and 2.

In addition, in the embodiment, a staircase with a landing made of a steel frame structure is shown as an example, but the structure of the present invention can also be applied to stairs with a landing made of a structure other than a steel frame structure, for example, a timber frame structure.

1 Pillar device 1A Pillar 1B Horizontal member (horizontal support member)
2 Floor parts 2A, 2X Floor base structure 2B Floor 3 Turned stairs 4 Stair part 4A Lower stair part 4B Upper stair part,
5 Landing 6 Open corridor 21 One side girder 21X Part 21Y corresponding to the lower staircase part of one side girder Part 22 corresponding to the upper staircase part of one side girder Other side girder 23 One end side beam 24 Other end side beam 25 Joist 27 One central side reinforcing member 28 Other central side reinforcing member 40 Slat girder

Claims (4)

A staircase in which the landing floor or the open corridor floor is supported by a column device,
The pillar device is
The floor structure comprises one pillar connected to one end of the floor in the longitudinal direction, a horizontal support member provided on the upper end of the one pillar and extending along the longitudinal direction of the underside of the floor to support the underside of the floor, and another pillar connected to the other end of the floor in the longitudinal direction, and a horizontal support member provided on the upper end of the other pillar and extending along the longitudinal direction of the underside of the floor to support the underside of the floor,
A staircase characterized in that the horizontal support member is a cross member arranged across one pillar and the other pillar arranged at a distance from each other in the longitudinal direction of the floor portion. The staircase is a return staircase installed outdoors or indoors,
The floor portion of the landing of the turn-around staircase includes a floor substructure and a floor constructed on the floor substructure;
The floor understructure comprises: one side girder located on the side closer to the stair portion of the folded staircase; another side girder arranged parallel to and facing the one side girder at a distance; a one-end beam connecting one end side of the one side girder in the extension direction to one end side of the other side girder in the extension direction; an other-end beam connecting the other end side of the one side girder in the extension direction to the other end side of the other side girder in the extension direction; and a joist connecting the one side girder to the other side girder;
The outer rafter of the lower staircase part of the turn-around staircase and one end side beam of the floor base structure are formed as one piece, and the outer rafter of the upper staircase part of the turn-around staircase and the other end side beam of the floor base structure are formed as one piece,
The staircase described in claim 1, characterized in that the column device has a cross member positioned below the floor substructure, the upper end of one column is connected to the one-end beam, and the upper end of the other column is connected to the other-end beam. The staircase is a return staircase installed outdoors or indoors,
The floor portion of the landing of the turn-around staircase includes a floor substructure and a floor constructed on the floor substructure;
The floor understructure comprises one side girder located on the side closer to the stair portion of the folded staircase, the other side girder arranged parallel to and facing the one side girder at a distance, a one-end side beam connecting one end side of the extension direction of the one side girder to one end side of the extension direction of the other side girder, an other-end side beam connecting the other end side of the extension direction of the one side girder to the other end side of the extension direction of the other side girder, and a joist connecting the one side girder to the other side girder, the one side girder being divided into a portion corresponding to the lower stair portion and a portion corresponding to the upper stair portion, and comprising, on the central side, one central reinforcing member and the other central reinforcing member parallel to the one-end side beam and the other-end side beam,
The outer rafter of the lower staircase part of the turn-around staircase and one end side beam of the floor base structure are formed as one piece, and the outer rafter of the upper staircase part of the turn-around staircase and the other end side beam of the floor base structure are formed as one piece,
The inner slat of the lower staircase portion and one of the central reinforcing members are constructed as a single piece, and the single piece is connected to the divided end of the part corresponding to the lower staircase portion of one side girder, and the single piece is connected to the other side girder,
The inner slat of the upper staircase portion and the other central reinforcing member are constructed as a single piece, and the single piece is connected to the divided end of the part corresponding to the upper staircase portion of one side girder, and the single piece is connected to the other side girder,
The column device is characterized in that a cross member is positioned below the floor substructure, and the cross member is connected to one central reinforcing member and the other central reinforcing member, and the upper end side of one column is connected to one end beam, and the upper end side of the other column is connected to the other end beam. 4. The staircase according to claim 2 or 3, characterized in that the joists and the cross members of the column device are connected to each other.

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