JP6955926B2 - Staircase structure and building - Google Patents

Description

The present invention relates to a staircase structure and a building that is installed indoors and connects downstairs and upstairs so as to be able to move up and down.

The indoor staircase described in Patent Document 1 is provided with a plurality of tread plate portions, and a riser plate portion is provided between each of the tread plate portions. The riser plate portion on the upper surface side of the tread plate portion is provided with an air outlet for blowing air on the upper surface of the tread plate portion, and a suction port is formed on the riser plate portion on the lower side of the lowermost step plate portion. Further, below the tread plate portion and the riser plate portion, a communication air path communicating with each of the air outlets is provided, and in the space below the communication air path, the communication air path is communicated to the communication air path at the upper part via a blower. An intake path is provided, an intake device is provided at the lower part of the intake path, and a suction port is formed.

As a result, in the indoor stairs described in Patent Document 1, the air sucked from the suction port to the intake path by the intake device is blown to the communicating air path by the blower, and the tread plate portion of the indoor stairs is blown from each of the outlets. It blows out to the tread surface to prevent dust and the like from accumulating on the tread surface of the tread plate.

Japanese Unexamined Patent Publication No. 2013-091897

By the way, the stairs installed inside the building include spiral (spiral) stairs and power girder (strengthening) stairs, and the spiral stairs and power girder stairs are often used as skeleton stairs. The skeleton staircase is a so-called kick-in openwork staircase that does not have a riser plate, and the skeleton staircase has the characteristics that it is possible to improve daylighting and ventilation, and a high sense of openness and design can be obtained. doing.

However, the skeleton stairs omit the riser board. For this reason, it is difficult to secure the characteristics of the skeleton stairs and to suppress the accumulation of dust and the like on the treads.

The present invention has been made in view of the above facts, and an object of the present invention is to provide a staircase structure and a building capable of both ensuring the characteristics of a skeleton staircase and suppressing the accumulation of dust and the like on the treads.

The first aspect of the present invention is to support a plurality of tread plates arranged at predetermined intervals in the height direction of a building, and a hollow tubular shape inside, with the tread plates open between the plurality of tread plates. It has a support portion and a blowout portion formed in the support portion and blown out air supplied to the inside of the support portion toward the tread surface of the tread plate.

In the first aspect, a plurality of treads arranged at predetermined intervals in the height direction of the building are supported by the support portion with the treads open, and a skeleton without a riser plate. The stairs are constructed. Further, the support portion has a cylindrical shape with a hollow inside, and the support portion is provided with a blowout portion.

Here, when air is supplied to the inside of the hollow of the support portion, the supplied air is blown out from the blowout portion toward the tread surface of the tread plate. As a result, dust and the like falling on the tread surface of the tread plate can be flowed to the peripheral edge of the tread plate by the air blown out from the blowing portion, and the accumulation of dust and the like on the tread plate can be suppressed.

In the second aspect, in the first aspect, the support portion is a support column which is installed so that the longitudinal direction is the building height direction and supports each of the treads arranged around the support portion.

In the second aspect, there is a support column as a support portion, and the support column is installed so that the longitudinal direction is the building height direction (vertical direction), and a plurality of columns are arranged around the support column in the longitudinal direction of the support column. Each of the treads is supported by a strut. As a result, a spiral staircase as a skeleton staircase is constructed, and air is blown out onto the tread surface of the tread plate from the blowout portion formed on the support column. Therefore, it is possible to prevent dust and the like from accumulating on the tread surface of the tread plate.

In the third aspect, in the first aspect, the support portion is a girder portion provided on the intermediate portion in the stair width direction or both end portions in the stair width direction to support each of the tread plates.

In the third aspect, the girder portion is applied as the support portion. In the third aspect, the girder portion may be any of a force girder in the force girder staircase, a sasara girder in the sasara girder staircase, a side girder in the side girder staircase, and the like. The girder part supports a plurality of treads to form a skeleton staircase. Further, in the girder portion, by supplying air to the inside, the supplied air is blown out from the blowing portion onto the tread surface of the tread plate. As a result, it is possible to prevent dust and the like from accumulating on the tread surface of the tread plate.

A fourth aspect includes a staircase having a staircase structure according to any one of the first to third aspects, and a blowing means for supplying air to the hollow interior of the support portion.

In the fourth aspect, a plurality of treads are arranged in the height direction of the building, and a staircase (skeleton staircase) supported by a support portion is provided with the space between them open. For this reason, the lighting and ventilation around the stairs are improved, and a high sense of openness and design can be obtained.

Further, in the fourth aspect, the blowing means is provided, and the blowing means supplies air to the inside of the support portion. The blowing means may be configured to supply indoor air to the support portion or may be configured to supply outdoor air to the support portion. As a result, the air supplied to the support portion is blown out from the blowing portion toward the tread surface of the tread plate, so that it is possible to prevent dust and the like from accumulating on the tread surface of the tread plate.

In a fifth aspect, in the fourth aspect, the air-conditioning means includes an air-conditioning means for generating air-conditioned air for indoor air conditioning, and the air-conditioned air generated by the air-conditioned means is supplied to the support portion.

In the fifth aspect, the air conditioning means is provided as the blowing means, and the air conditioning air generated by the air conditioning means is supplied to the support portion of the stairs. As a result, it is possible to prevent dust and the like from being blown out from the blowing portion of the support portion and accumulating dust and the like on the tread surface of the tread plate, and it is possible to air-condition the surroundings of the stairs.

As described above, according to the first aspect of the present invention, it is possible to obtain the effect of ensuring the characteristics as a skeleton staircase and suppressing the accumulation of dust and the like on the tread surface of the tread plate.

According to the second aspect, in the spiral staircase in which a plurality of treads are arranged around the columns, it is possible to secure the characteristics as a skeleton staircase and suppress the accumulation of dust and the like on the treads.

According to the third aspect, in a skeleton staircase in which a plurality of treads are supported with the girder portion open between the treads, it is possible to secure the characteristics as a skeleton staircase and suppress the accumulation of dust and the like on the treads. It is compatible.

According to the fourth aspect, the characteristics of the skeleton staircase can be ensured, and the accumulation of dust and the like on the tread surface of the tread plate can be suppressed.

According to the fifth aspect, it is possible to suppress the accumulation of dust and the like on the tread surface of the tread plate, and it is possible to obtain the effect that the surroundings of the stairs can be air-conditioned.

It is an elevation view which shows the main part of the building which concerns on 1st Embodiment. It is sectional drawing of the column which shows the main part of a spiral staircase. It is a top view which shows the main part of a spiral staircase. It is an elevation view of the front view which shows the main part of the force girder stairs which concerns on 2nd Embodiment. It is an elevation view of the side view which shows the main part of the force girder stairs which concerns on 2nd Embodiment. It is sectional drawing of the main part of the force girder stairs which concerns on 2nd Embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[First Embodiment]
In FIG. 1, the main part of the building 10 according to the first embodiment is shown in elevation. The building 10 has a two-story structure with a steel frame structure, and a living space 12A on the lower floor (first floor) and a living space 12B on the upper floor (second floor) are formed in the building 10. At the same time, an atrium space (atrium) 12C connecting the living space 12A and the living space 12B is formed.

In the living space 12A and the atrium space 12C, a floor base (not shown) is attached to the floor beam on the first floor, and a floor material (floor finishing material) such as flooring is attached to the floor base to form the floor 14. ing. In the living space 12B on the second floor, a floor base is attached to the floor beam (ceiling beam on the first floor) 16 on the second floor, and a floor material (floor finishing material) such as flooring is attached to the floor base to form the floor 18. Has been done. Further, on the floor 18 on the second floor, a handrail 20 is formed on a part of the peripheral edge portion on the atrium space 12C side.

The building 10 is provided with a spiral staircase 22 as a staircase according to the first embodiment, and the spiral staircase 22 is installed in the atrium space 12C and can move (elevate) between the living spaces 12A and 12B. It is connected to. FIG. 2 shows the main part of the spiral staircase 22 in a side view, and FIG. 3 shows the main part of the spiral staircase 22 in a plan view.

As shown in FIG. 1, the spiral staircase 22 includes a tubular support 24 as a support portion. A round steel pipe is used for the support column 24, and a hollow portion 24B surrounded by an outer peripheral wall 24A is formed on the support column 24. A base plate 26 is attached to one end side in the longitudinal direction of the support column 24, and the support column 24 is opened on the base plate 26 side (not shown) and has an end portion opposite to the base plate 26 (the other end side in the longitudinal direction). Is blocked at the end).

In the support column 24, the base plate 26 is on the floor 14 side, the longitudinal direction is the vertical direction (building height direction, vertical direction), and the base plate 26 is the floor base (or floor beam) of the floor 14 by bolts 26A or the like. It is fastened and fixed to. As a result, the support column 24 is erected substantially vertically from the floor 14 in the atrium space 12C. Further, the upper end of the support column 24 is set to be substantially the same height as the upper end of the handrail 20 provided on the floor 18 on the second floor. The upper end of the support column 24 may be higher than the handrail 20 or may reach the ceiling on the second floor.

The spiral staircase 22 is provided with a plurality of steps of treads 28 on the columns 24. The tread plate 28 has a predetermined (rise dimension) interval in the vertical direction (building height direction), and is a spiral that is shifted clockwise (or counterclockwise) about the support column 24 by a predetermined angle as it goes upward. It is shaped and arranged around the support column 24.

As shown in FIG. 3, the tread plate 28 is formed in a substantially isosceles right triangle shape (substantially trapezoidal shape) in a plan view, and the apex side (upper bottom side) is the support column 24 side and the outer peripheral side. The bottom side (lower bottom side) is formed in an arc shape centered on the support column 24. A step frame 30 is arranged below the tread plate 28. The step frame 30 has a substantially isosceles triangle shape (substantially trapezoidal shape) similar to the tread plate 28 in plan view, and the tread plate 28 is attached to the upper part of the step frame 30.

As shown in FIGS. 1 and 2, a stay 32 is arranged under the step frame 30, and the stay 32 is joined to the lower surface of the step frame 30. The apex side of the step frame 30 is joined to the outer peripheral wall 24A of the support column 24, and the stay 32 is joined to the outer peripheral wall 24A of the support column 24 below the joining position of the step frame 30. As a result, the spiral staircase 22 is a so-called skeleton staircase in which the tread plate 28 is supported by the support column 24 and the space between the vertically adjacent tread plates 28 (kicking) is opened (no kicking plate is provided). (Also called see-through stairs, kick-in openwork stairs, etc.).

As shown in FIG. 1, the spiral staircase 22 is provided with a spiral handrail 34, and the axis of the handrail 34 is coaxial with the axis of the column 24, and is around the axis of the column 24. It is arranged. The handrail 34 is connected to the upper ends of a plurality of handrails 34A erected on the peripheral edge portion of each of the treads 28 on the opposite side of the support column 24, and the handrail 34 is connected to the support column 24 via the handrail 34A. It is fixed to.

A landing 36 is provided between the uppermost tread 28 and the floor 18 on the second floor, and the landing 36 has a rectangular tread 36A mounted on a rectangular frame 36B. The frame 36B of the landing 36 is connected to the support column 24 and the floor beam 16 on the second floor, so that the landing area 36 is supported by the support column 24 and the floor beam on the second floor, and the support column 24 of the spiral staircase 22 passes through the frame 36B. It is connected to the floor beam 16 on the second floor. Further, the landing 36 is provided with a handrail 38, and one end of the handrail 38 is connected to the support column 24, and the upper ends of a plurality of handrails 38A erected from the frame 36B are connected and supported on the lower side. Has been done.

On the other hand, as shown in FIGS. 1 to 3, the support column 24 is formed with a plurality of outlets 40 as outlets. The outlet 40 is a long hole (slit) long in the vertical direction (the length direction of the support column 24) (see FIGS. 1 and 2), and the outlet 40 is below between the vertically adjacent treads 28. It is formed to penetrate the outer peripheral wall 24A of the support column 24 so as to face the tread plate 28 on the side. Further, as shown in FIG. 3, the opening width of the outlet 40 is widened toward the outer side in the radial direction of the support column 24. As a result, the inside of the hollow portion 24B of the support column 24 and the upper side of the tread surface of each tread plate 28 are communicated with each other by the outlet 40, and the hollow portion 24B of the support column 24 is directed by the outlet 40 toward substantially the entire tread surface of the tread plate 28. It is open.

In the spiral staircase 22, air is supplied to the hollow portion 24B of the support column 24, and the air pressure of the hollow portion 24B becomes higher than that around the outer peripheral wall 24A (on the tread surface of the tread plate 28). Air is blown out from each of the outlets 40. As a result, in the spiral staircase 22, an air flow (air flow) is formed on the tread surface of the tread plate 28 from the support column 24 side to the peripheral edge of the tread plate 28 opposite to the support column 24.

An air conditioning system for the entire building is formed in the building 10. As shown in FIG. 1, an air-conditioning equipment 42 as an air-conditioning means in the entire building air-conditioning system is provided on the first floor of the building 10, and the air-conditioning equipment 42 mainly handles air conditioning of the living space 12A (downstairs). ing. The entire building air-conditioning system may be provided with an air-conditioning facility that is responsible for air-conditioning the living space 12B in addition to the air-conditioning facility 42, or the air-conditioning equipment 42 may be configured to be responsible for the air conditioning of the living space 12B.

The air conditioner 42 includes an outdoor unit (not shown) and an indoor unit 46 as a means of blowing air, such as a machine room in which the outdoor unit is installed outside the building 10 and the indoor unit 46 is provided in the living space 12A. It is installed in a predetermined place. In the air conditioning equipment 42, the outdoor unit and the indoor unit 46 are connected by a refrigerant pipe (not shown), and the refrigerant for air conditioning is circulated through the refrigerant pipe.

Further, the air conditioner 42 includes a plurality of outlets and a plurality of suction ports (all not shown) opened in the living space 12A in the building 10. The plurality of outlets are connected to the indoor unit 46 via a supply path such as a supply duct, and the plurality of suction ports are connected to the indoor unit 46 via a suction path such as a suction duct. The indoor unit 46 generates air-conditioning air by exchanging heat between the air sucked from the suction port and the refrigerant, and blows out the generated air-conditioning air from the air-conditioning port to air-condition the inside of the living space 12A. The indoor unit 46 may perform air conditioning and ventilation of the living space 12A by sucking in outdoor air and generating air-conditioning air including the sucked outdoor air.

A supply duct 48 as one of the supply routes is arranged under the floor of the first floor (living space 12A), and one end side of the supply duct 48 is connected to the indoor unit 46. Further, the other end side of the supply duct 48 (the side opposite to the indoor unit 46) is penetrated through the floor 14 on the lower side of the base plate 26 and connected to the support column 24, and is opened in the hollow portion 24B of the support column 24. As a result, the air-conditioned air (air-conditioned air) generated by the indoor unit 46 is supplied to the hollow portion 24B of the support column 24.

Next, the operation of the first embodiment will be described.
In the building 10, a spiral staircase 22 is installed in the atrium space 12C, and the spiral staircase 22 is a skeleton staircase in which the space between the treads 28 adjacent to each other in the height direction of the building is open. Therefore, in the building 10, the air permeability and daylighting of the atrium space 12C are high, and the air permeability between the living spaces 12A and 12B is high. Further, the indoor design of the building 10 is improved by the spiral staircase 22 installed in the atrium space 12C.

A plurality of outlets 40 are formed on the outer peripheral wall 24A of the support column 24 of the spiral staircase 22, and the hollow portion 24B of the support column 24 is directed toward the tread surface of the tread plate 28 (diameterally outside of the support column 24) by the outlet 40. It is open. Further, a supply duct 48 of the air conditioner 42 is connected to the lower end of the support column 24.

Therefore, when the air conditioning equipment 42 is activated, air conditioning air is supplied from the indoor unit 46 to the hollow portion 24B of the support column 24, and the air conditioning air supplied to the hollow portion 24B is blown out from each of the outlets 40. As a result, the atrium space 12C in which the spiral staircase 22 is installed is air-conditioned. Moreover, since the outlet 40 is provided up to the upper side of the uppermost tread plate 28, the atrium space 12C can be air-conditioned over a wide range, and there is a temperature difference (difference in air conditioning state) between the upper side and the lower side in the atrium space 12C. It can be suppressed from occurring.

Here, the outlet 40 of the support column 24 is directed on the tread surface of the tread plate 28, and the air-conditioning air blown out from the outlet 40 flows on the tread surface of the tread plate 28. Therefore, the air-conditioning air blown from the outlet 40 forms an air flow on the tread surface of the tread plate 28 from the support column 24 side to the peripheral side of the tread plate 28 (the radial side of the support column 24), and the tread surface of the tread plate 28. Dust or the like that falls upward is washed off from the tread surface of the tread plate 28.

As a result, in the spiral staircase 22, dust and the like in the air of the atrium space 12C can be suppressed from accumulating on the tread surface of the tread plate 28. Therefore, the spiral staircase 22 can secure the characteristics as a skeleton staircase and can suppress the accumulation of dust and the like on the tread surface of the tread plate 28. Moreover, since the air-conditioning air blown from the outlet 40 flows on the tread surface of the tread plate 28, dust and the like on the tread surface of the tread plate 28 can be removed from the tread surface of the tread plate 28.

In the first embodiment, the support column 24 is made of a round steel pipe as a support member, but the support member is a plurality of cylindrical short pipes having a predetermined length (for example, the tread plate 28 shown in FIG. 2). (Short pipes with a length of one step) may be formed by superimposing them in the axial direction. In this case, each of the short pipes forming the support member (post) may be provided with one or a plurality of steps of the tread plate 28, and the outlet 40 may be formed on the outer peripheral wall.

Further, in a circular staircase such as a spiral staircase, the support member may be formed in a cylindrical shape having a hollow inside, and may be formed not only in a cylindrical shape but also in a polygonal tubular shape in an outer shape.

Further, in the first embodiment, the supply duct 48 is arranged under the floor of the first floor, and the air conditioning air is supplied from the underfloor side to the hollow portion 24B of the support column 24. However, the height of the support column 24 may be set so that the upper end reaches the ceiling of the second floor, and air conditioning air may be supplied from the ceiling side of the second floor to the hollow portion 24B of the support column 24. In this case, the air-conditioning equipment for air-conditioning the living space 12B on the second floor may supply the air-conditioning air to the columns 24.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS. 4 to 6. In the second embodiment, the same functional components as those in the first embodiment are designated by the same reference numerals as those in the first embodiment, and detailed description thereof will be omitted.

In the second embodiment, the force girder (strengthened) staircase 50 is applied instead of the spiral staircase 22 of the first embodiment. FIG. 4 shows a schematic configuration of the force girder stairs 50 in a frontal elevation view, and FIG. 5 shows a schematic configuration of the force girder stairs 50 in a side view elevation view. In 6, the main part of the power girder staircase 50 is shown in a cross-sectional view cut in the vertical direction.

As shown in FIGS. 4 and 5, the force girder staircase 50 is provided with a force girder 52 made of steel as a support portion and a girder portion, and the force girder 52 is the floors 14 and 2 on the first floor. It is sloping and bridged between the floors 18 (floor beams 16) on the floor.

As shown in FIG. 4, the force girder 52 is provided with a pair of side plate portions 54 arranged on both sides in the width direction of the stairs, and the side plate portions 54 are made of a highly rigid steel plate, and the force girder 52 Forming the skeleton of. Further, as shown in FIG. 5, the force girder 52 has a back plate portion 56 that covers the back side of the stairs between the side plate portions 54, an upper plate portion 58 that covers the upper end portion between the side plate portions 54, and a side plate portion 54. A lower plate portion 60 (see FIG. 4) that covers the lower end portion of the stairs, and a front plate portion 62 that covers the front side of the stairs between the side plate portions 54 are provided. As a result, the force girder 52 is formed into a substantially tubular shape in which a hollow portion 52A is provided inside by a pair of side plate portions 54, a back plate portion 56, an upper plate portion 58, a lower plate portion 60, and a front plate portion 62. Has been done.

Further, as shown in FIGS. 4 and 5, a plurality of treads 64 are provided on the power girder stairs 50, and the treads 64 are formed in a rectangular strip shape. As shown in FIGS. 5 and 6, the force girder 52 is formed with a plurality of notches 66 on the front side of the stairs. The notch portion 66 is formed so as to straddle the side plate portion 54 and the front plate portion 62 of the force girder 52 so that the vertical interval is the rise dimension in the force girder stairs 50. Further, the notch portion 66 is formed by being cut out in the force girder 52 in a groove shape along the stair width direction so as to be substantially parallel to the floor 14.

One end of the tread 64 in the width direction is fitted into the notch 66 and attached to the force girder 52. As a result, a plurality of tread plates 64 are fixed to the force girder 52 so that the distance between the tread plates 64 adjacent to the top and bottom is set to the rising dimension. Further, as shown in FIG. 6, the widthwise end portion of the tread plate 64 protrudes into the hollow portion 52A of the force girder 52. A bracket (not shown) is attached to the lower surface of the tread plate 64, the tread plate 64 is fitted into the notch 66, and the bracket is fixed to the outer surface (side plate portion 54) of the force girder 52 in the stair width direction. It is attached to the force girder 52. Further, even if the tread plate 64 does not have a notch 66 in the force girder 52 and the bracket attached to the lower surface of the tread plate 64 is fixed to the front plate portion 62 (side plate portion 54) and attached to the force girder 52. good.

As shown in FIGS. 4 and 5, in the force girder 52, brackets 68 are attached to the lower ends of the side plate portions 54 on the outer side in the width direction of the stairs, and the brackets 68 are attached to the floor base of the floor 14 by bolts or the like. Or it is fastened and fixed to the floor beam). Further, a bracket (not shown) is attached to the upper end of the side plate portion 54 of the force girder 52, and the bracket is fastened and fixed to the floor beam 16 on the second floor by a bolt or the like.

As shown in FIG. 4, one side of the force girder staircase 50 in the staircase width direction is close to the wall surface 12D of the atrium space 12C, and each of the treads 64 has a wall surface 12D on one end side in the longitudinal direction (staircase width direction). It is located most recently. Further, as shown in FIGS. 4 and 5, the force girder staircase 50 is provided with a handrail 70 on the other end side (opposite side of the wall surface 12D) in the width direction of the stairs, and the handrail 70 is a tread plate 64. The upper ends of a plurality of handrails 70A (see FIG. 5, not shown in FIG. 4) erected on the other end side in the longitudinal direction (opposite side to the wall surface 12D) are connected and attached to the tread 64.

On the other hand, as shown in FIGS. 4 and 6, the force girder 52 is provided with a plurality of outlets 72 as outlets. The outlet 72 is formed to penetrate between the treads 64 and between the side plates 54 toward the tread of the lower tread 64, and the outlet 72 is substantially parallel to the tread of the tread 64 in the longitudinal direction. It is a long hole (see FIG. 4). As a result, the hollow portion 52A of the force girder 52 and the tread surface of each tread plate 64 are communicated with each other by the outlet 72, and the hollow portion 52A of the force girder 52 is opened by the outlet 72 toward the tread surface of the tread plate 64. It has been done. It is preferable that the upper end inner surface and the lower end inner surface of the outlet 72 are inclined toward the tread plate 64 (inclination so that the tread plate 64 side is on the lower side).

In the force girder stairs 50, air is supplied into the hollow portion 52A of the force girder 52, and the air pressure in the hollow portion 52A becomes higher than the circumference of the force girder 52 (the tread plate 64 side of the outlet 72), so that the hollow portion 52A is hollow. The air in the portion 52A is blown out from the outlet 72. As a result, an air flow is formed on the tread surface of the tread plate 64 by the conditioned air blown from the outlet 72.

Further, as shown in FIG. 5, a supply duct 48 is arranged under the floor (lower side of the floor 14) on the first floor, and the supply duct 48 penetrates the floor 14 to penetrate the lower plate portion of the force girder 52. It is connected to 60 and is opened in the hollow portion 52A. As a result, air conditioning air is supplied from the indoor unit 46 to the hollow portion 52A of the force girder 52.

The force girder stairs 50 configured in this way are skeleton stairs in which the space between the vertically adjacent treads 64 is open. For this reason, the atrium space 12C in which the force girder stairs 50 are installed is more breathable and daylighting than the case where a staircase having a riser plate is provided, and the living space 12A is provided. , 12B is highly breathable. Further, when installed in the atrium space 12C, the power girder stairs 50 improve the design of the living spaces 12A and 12B and the atrium space 12C.

A hollow portion 52A is formed in the force girder 52 of the force girder stairs 50, an outlet 72 is formed in the front plate portion 62, and a supply duct 48 is connected to the hollow portion 52A. Therefore, when the air conditioner 42 is operated and the air conditioner air is supplied from the indoor unit 46 to the hollow portion 52A of the force girder 52, the supplied air conditioner air is blown out from each of the outlets 72 onto the tread surface of the tread plate 64. Will be done. As a result, the atrium space 12C provided with the power girder stairs 50 is air-conditioned. Moreover, since the outlet 72 in the force girder 52 is provided up to the upper side of the uppermost tread plate 64, the atrium space 12C can be air-conditioned over a wide range, and the temperature difference (air conditioning) between the upper side and the lower side in the atrium space 12C. It is possible to suppress the occurrence of (difference in state).

Further, the conditioned air blown from the outlet 72 forms an air flow (air flow) on the tread surface of the tread plate 64. Therefore, dust and the like falling on the tread surface of the tread plate 64 in the atrium space 12C are flown to the peripheral edge side of the tread plate 64 by the air flow on the tread surface of the tread plate 64 formed by the air-conditioning wind. As a result, in the force girder stairs 50, it is possible to prevent dust and the like in the air from accumulating on the tread surface of the tread plate 64. Moreover, since the air-conditioning air blown out from the outlet 72 flows on the tread surface of the tread plate 64, dust and the like on the tread surface of the tread plate 64 can be removed from the tread surface of the tread plate 64.

In the hollow portion 52A of the inclined force girder 52, air conditioning air is supplied from the lower side, and when the air conditioning air directly reaches the outlet 72, the air conditioning air is directed from the outlet 72 toward the lower surface of the upper tread plate 64. There is a high possibility that it will flow out. On the other hand, the end portion of the tread plate 64 protrudes into the hollow portion 52A of the force girder 52, and the end portion of the tread plate 64 blocks the air-conditioning air from directly heading to the outlet 72, and the end portion of the tread plate 64. It is possible to form an air-conditioning air flow along the line. Therefore, in the force girder 52, the flow of the conditioned air from the outlet 72 toward the lower surface of the upper tread 64 can be suppressed, and the flow of the conditioned air toward the upper tread of the lower tread 64 can be formed.

Therefore, in the force girder stairs 50, the characteristics as a skeleton staircase can be ensured, and dust and the like can be suppressed from accumulating on the tread surface of the tread plate 64.

In the second embodiment, a force girder staircase 50 using one force girder 52 as a support portion and a girder portion will be described as an example. However, the skeleton staircase may use two force girders 52. Further, the skeleton staircase having no riser plate between the vertically adjacent treads may be a sasara girder staircase using a sasara girder as a support portion and a girder portion, and a side girder staircase using a side girder. It may be. In any of the stairs, a support portion having a hollow portion and a girder portion (sasara girder or side girder) may be used to form a blowout portion that connects the hollow portion and the upper side of the tread surface of the tread plate.

Further, in the first and second embodiments described above, the indoor unit 46 of the air conditioning equipment 42 as the ventilation means and the air conditioning means is used, and the air conditioning air is supplied from the indoor unit 46 through the supply duct 48. It was configured in. However, the blower means may use a blower fan or the like to suck in the air in the building and supply it to the hollow portion of the support member. Further, as the ventilation means, the ventilation means that sucks the outdoor air and supplies it to the hollow inside of the support member is applied to ventilate the atrium space 12C and the living spaces 12A and 12B communicated with the atrium space 12C, respectively. It may be possible to prevent dust and the like from accumulating on the tread surface of the tread plate.

Further, in the first and second embodiments, the double-decker building 10 has been described as an example. However, the building 10 may have three or more floors, may be provided with a basement, and may be further provided with a rooftop. The staircase structure according to the first and second embodiments can be applied to a staircase that connects upstairs and downstairs so as to be able to move up and down in any of the space from the basement to the roof.

Further, the building 10 is not limited to the steel frame structure, but is a unit type building (unit house) in which a plurality of building units each framed by a steel frame are arranged vertically and horizontally to form a steel frame ramen structure. It may be a structure other than the steel frame structure and the steel ramen structure.

10 Buildings 12A, 12B Living space 12C Atrium space 22 Spiral staircase (staircase)
24 props (support part)
24B, 52A Hollow part 28, 64 Tread plate 40, 72 Blow-out port (blow-out part)
46 Indoor unit (blower means, air conditioning means)
48 Supply duct (blower means, air conditioning means)
50 force girder stairs (stairs)
52 Force girder (support part, girder part)
54 Side plate

Claims (4)

Multiple treads arranged spirally around the axis along the building height direction at predetermined intervals in the building height direction,
A state in which the inside is formed in a hollow tubular shape, one end is closed, the other end is opened, the longitudinal direction is the building height direction, and the treads are arranged at the center of the spiral of the treads to open the space between the treads. With the support part supported by
The air supplied to the inside of the support portion from the supply duct formed through the outer peripheral wall of the support portion and connected to the opening side of the support portion and opened inside the hollow portion is directed toward the tread surface of the tread plate. The blowout part and the blowout part
Staircase structure with. The staircase structure according to claim 1, wherein the support portion is a support made of a round steel pipe. A staircase having a staircase structure according to claim 1 or 2.
An air blowing means for supplying air from the opening of the support portion to the hollow inside of the support portion, and
Buildings including. Including air conditioning means to generate air conditioning air that air-conditions indoors
The building according to claim 3, wherein the air-conditioning means supplies the air-conditioned air generated by the air-conditioning means to the support portion.

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