Staircase

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

[Technical field]

[0001] The present invention relates to a staircase having a landing floor or an open corridor floor supported by a column device. [Background technology]

[0002] For example, a known example of a staircase in which the floor of the landing is supported by a pillar device is one in which the pillar device comprises a number of pillars connected to a portion of the floor close to the staircase side, and a number of pillars arranged to support from below the portion of the floor opposite the staircase side (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 6-26159 Summary of the Invention [Problem to be solved by the invention]

[0004] 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 supporting the landing floor at four points around the periphery of the floor, and the presence of many pillars below the floor poses issues such as limiting the use of the space below the floor and compromising the design of the building.

[0005] In order to solve the above problems, the present invention provides a staircase that is less susceptible to restrictions on the use of the space below the floor of a staircase landing or below the floor of an open corridor, while also improving the design of the building. [Means for solving the problem]

[0006] 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 side 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 side 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 beam 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 understructure 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 understructure 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. [Brief description of the drawings]

[0007] [Figure 1]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. [Diagram 2] FIG. 1 shows a folded staircase, where (a) is a plan view, (b) is a front view, and (c) is a right side view (upper side omitted). [Diagram 3] 2(a) is a view taken along the line AA in FIG. 2(a), FIG. 2(b) is a view taken along the line BB in FIG. 2(a), and FIG. 2(c) is a view taken along the line CC in FIG. 2(a). [Figure 4] FIG. 1 is a perspective view showing the framework structure of a turn-around staircase. [Diagram 5] (a) is a plan view of the staircase, (b) is an AA view of (a), (c) is a BB view of (a), and (d) is a CC view of (a). [Figure 6] FIG. 1 is a perspective view showing the framework structure of a turn-around staircase. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] 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 having, 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 between 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 columns 1A, 1A and the cross member 1B are connected by means of, for example, welding or mechanical connecting means such as gusset plates and bolts and nuts. According to a 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.

[0009] Next, an outdoor turn-back staircase having a landing floor supported by the pillar device 1 of the above-mentioned first embodiment will be described. In this specification, the terms front, rear, inside, and outside are defined as the directions shown in FIGS. Also, although FIG. 3 and FIGS. 5(b) to (d) are cross-sectional views, cross-sectional hatching has been omitted.

[0010] As shown in FIG. 2, the outdoor turn-back staircase 3 according to the first embodiment is configured so that a staircase portion 4 turns back via a landing 5, and is, for example, a staircase having a steel frame structure. In other words, the return staircase 3 is configured such that the staircase section 4 is composed of a lower staircase section 4A and an upper staircase section 4B connecting the lower floor and the upper floor, and the landing 5 is provided between the lower staircase section 4A and the upper staircase section 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.

[0011] 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 of, for example, a plurality of treads 43, 43... installed with their plate surfaces forming a horizontal plane, and a plurality of risers 44, 44... installed with their plate surfaces forming a vertical plane (see Figure 2(c)).

[0012] 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.

[0013] The floor underlay 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 one side girder 21 in the extension direction to one end side of the other side girder 22 in the extension direction, an other-end side beam (end beam) 24 connecting the other end side of the one side girder 21 in the extension direction to the other end side of the other side girder 22 in the extension direction, a joist 25 connecting the one side girder 21 and the other side girder 22, and a brace material 26 connecting the one side girder 21 and the other side girder 22. In other words, the floor understructure structure 2A comprises a one-end side beam 23 located at one end side of the longitudinal direction of the floor 2B, an other-end side beam 24 located 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, an 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 installed so as to rise from the other side girder 22, the one end beam 23, and the other end beam 24.

[0014] 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 beam 40 and the one end side beam 23, or the stringer beam 40 and the other end side beam 24 are integrally formed, or an integral object in which the stringer beam 40 and the one end side beam 23, or the stringer beam 40 and the other end side beam 24 are connected by a fixing means to be integrated. 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.

[0015] 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. As the connecting means, for example, mechanical connecting means such as a gusset plate P and bolts and nuts BN (see FIG. 3) or connecting means such as welding is used. 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. Moreover, the joist 25 is fixed to the one side girder 21 and the other side girder 22 by a fixing means. As the fixing means, for example, a mechanical fixing means such as a bolt nut BN or a fixing means such as welding is used.

[0016] 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, while improving 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.

[0017] EMBODIMENT 2 The folded staircase supported by the pillar device 1 of the first embodiment may have the structure 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 those 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 underlay 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 to be provided with one central reinforcing member 27 and the other central reinforcing member 28 parallel to the one end side beam 23 and the other end side beam 24 at the center between 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 severed 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 severed 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 stringer 40 and one of the central reinforcing members 27, or the stringer 40 and the other central reinforcing member 28 are integrally formed, or an integral object in which the stringer 40 and one of the central reinforcing members 27, or the stringer 40 and the other central reinforcing member 28 are connected by a fixing means and integrated. As the fixing means, for example, a fixing means such as welding, or a mechanical fixing means such as a gusset plate and bolts and nuts is used.

[0018] In the column device 1, 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, so that 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. As the connecting means, for example, mechanical connecting means such as a gusset plate P and bolts and nuts BN (see FIG. 5) or connecting means such as welding is used. In this manner, the cross member 1B and the central reinforcing members 27, 28 are connected by the connecting means, so that noise caused by interference between the members can be suppressed.

[0019] In the turn-back staircase of embodiment 2, the inner rafter 40 of the lower staircase portion 4A and one of the central reinforcement members 27 are formed as a single piece, and the inner rafter 40 of the upper staircase portion 4B and the other central reinforcement member 28 are formed as a single piece.Furthermore, the entire floor portion 2 of the landing 5 is supported by a gate-shaped column device 1, so that the same effect as the staircase of embodiment 1 can be obtained while the strength of the floor portion 2 of the landing 5 can be further improved.

[0020] In each embodiment, an example has been given of a staircase in which the floor section 2 of the landing 5 of an outdoor spiral 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 spiral staircase is supported by a pillar device 1. For example, the floor of a landing of an outdoor straight staircase or a spiral staircase, or the floor of an open corridor connected to the top end of an outdoor staircase, may be supported by the pillar device 1. In addition, the stairs may be configured such that the floor part of a landing of an indoor staircase or the floor part of an indoor open corridor is supported by the pillar device 1.

[0021] In addition, in the embodiment, a pillar device 1 configured in a gate shape having two pillars 1A, 1A spaced apart and a cross member 1B provided across the upper ends 1t, 1t of each pillar 1A, 1A is exemplified, but the pillar device may be configured to include a pillar and a horizontal support member provided 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.

[0022] In addition, in the embodiment, a staircase with a landing made of a steel frame structure has been exemplified, but the structure of the present invention can also be applied to a staircase with a landing made of a structure other than a steel frame structure, for example a timber frame structure. [Explanation of symbols]

[0023] 1 pillar device 1A Pillar 1B Horizontal support member 2 Floor 2A,2X Subfloor structure 2B floor 3. Turn-around Stairs 4 Stairs section 4A Lower staircase part 4B Upper staircase part, 5. Landing 6 Open Corridor 21 One side girder 21X The part corresponding to the lower stair part of one side girder 21Y Part corresponding to the upper staircase part of one side girder 22 Other side girder 23 One end side beam 24 Other end beam 25 Joist 27 One of the central reinforcing members 28 Other central reinforcing member 40 Saragi

Claims

1. 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 spaced apart in the longitudinal direction of the floor portion.

2. 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.

3. 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 side reinforcing member and the other central side 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. 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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