JP2020094456A - Staircase structure - Google Patents

Abstract

To provide a staircase structure capable of improving workability when assembling a staircase member to a force beam.SOLUTION: A staircase 16 includes a staircase member 28 in which a substantially rectangular flat plate is bent into a substantially L-shape to integrally form a tread portion 36 and a riser portion 38, and a pair of force beams 26 arranged at both ends of the staircase member 28. The force beam 26 includes a web portion 26A extending in the building height direction and an upper flange 26B extending in a direction away from the web portion 26A from an upper end of the web portion 26A in a longitudinal sectional view. A space 30 that is open to the lower side of the building is formed below the upper flange 26B. Further, on the upper flange 26B, a tread side flange 36A and a riser side flange 38A which are integrally formed with the tread portion 36 and the riser portion 38 from the building upper side respectively are placed and fixed.SELECTED DRAWING: Figure 2

Description

The present invention relates to a staircase structure.

Patent Document 1 discloses a staircase member (step plate member) having a tread surface and a riser plate, and a steel frame staircase having a pair of force beams for supporting the step plate member from below (see FIG. 4 ). The force beam described in Patent Document 1 is a channel steel. Specifically, a web portion that extends in the height direction in a vertical cross-sectional view, an upper flange that extends from the upper end of the web portion to the other force beam side, and a lower portion of the web part to the other force beam side. And has a lower flange disposed opposite to the upper flange. When the staircase member is fixed to the power beam, the mounting flange formed on the staircase member is placed on the upper surface of the upper flange of the power beam, and these are fixed (bolted).

JP, 2005-213896, A

However, in the above-mentioned prior art, the lower flange is arranged to face the lower side of the upper flange of the power beam. Therefore, when attempting to fix the staircase member from the lower side of the upper flange of the power beam, the lower flange of the power beam interferes with the operator's hand, which may be annoying.

In view of the above facts, the present invention has an object to obtain a staircase structure that can improve workability when assembling a staircase member to a power beam.

In the staircase structure according to the first aspect, a substantially rectangular flat plate is bent into a substantially L-shape to integrally form a tread plate portion and a riser portion, and a tread plate side flange and a riser portion integrally formed at a rear end portion of the tread portion are formed. A plurality of stair members configured to include a riser flange integrally formed at the lower end portion, and a pair of web parts that are arranged in pairs at both longitudinal ends of the stair member and extend in the building height direction in a longitudinal sectional view. And an upper flange that extends from the upper end of the web portion in a direction away from the web portion and that is fixed from the building upper side to the tread side flange and the riser side flange. And a pair of girders in which a space opened to the lower side of the building is formed below the upper flange.

In the staircase structure according to the first aspect, a substantially rectangular flat plate is bent into a substantially L-shape to integrally form a step board portion and a riser portion, and a pair of staircase members arranged at both ends in the longitudinal direction of the staircase member. It has a digit and. The pair of girders includes a web portion that extends in the height direction of the building and an upper flange that extends in a direction away from the web portion from the upper end of the web portion in a longitudinal sectional view. Further, on the upper flange, a tread side flange and a tread side flange, which are integrally formed on the tread section and the rise section, are placed and fixed from above the building.

Here, in the pair of girders described above, a space that is open to the lower side of the building is formed below the upper flange. Thus, when fixing the upper flange to the step member, a working space is secured below the upper flange, so that the work can be easily performed from the lower side of the girder.

In the staircase structure according to the second aspect, in the configuration according to the first aspect, the girder includes a lower flange extending from a lower end of the web portion in a direction opposite to the upper flange.

In the staircase structure according to the second aspect, an upper flange and a lower flange extending in opposite directions are provided at the upper end and the lower end of the web portion of the girder. That is, the cross-sectional shape of the girder is substantially Z-shaped in a vertical cross-sectional view. As a result, the cross-sectional rigidity is improved as compared with the case where the girder is made of chevron steel or channel steel, so that the rigidity of the stairs can be secured while suppressing the plate thickness of the girder.

Further, since the upper flange and the lower flange extend in opposite directions, a working space is secured not only on the lower side of the upper flange described above but also on the upper side of the lower flange. For this reason, an operator does not receive interference from the flange on the other side when working on either the upper or lower flange, and thus it is easy to use both flanges as a mounting surface for another structure.

In the stair structure according to the third aspect, in the configuration according to the first aspect or the second aspect, the tread side flange and the rise side flange are arranged inside the tread section and the rise section. ..

In the staircase structure according to the third aspect, the tread side flange and the rise side flange are arranged inside the tread section and the rise section. As a result, the tread side flange and the rise side flange are not exposed on the surface of the stairs, and these flanges do not interfere with the finishing material set on the surfaces of the tread section and the rise part. As a result, the effect of the staircase member on the finishing material can be suppressed, and the design of the staircase can be improved.

The staircase structure according to a fourth aspect is the structure according to any one of the first aspect to the third aspect, wherein the girder has a side surface of the web portion in an ascending or descending direction of a staircase. It is fixed to the building structure located on the descending side or both.

In the staircase structure according to the fourth aspect, in addition to the upper flange of the girder, the web portion is used as a fixing portion with the building structure. As a result, the mounting surface for the building structure or another member can be efficiently secured without complicating the shape of the girder, and the cost of the member can be suppressed.

As described above, according to the staircase structure according to the first aspect, by providing the work space below the upper flange, it is possible to improve the workability when assembling the staircase member to the girder. Have an effect.

According to the staircase structure of the second aspect, it is possible to improve the rigidity of the staircase while suppressing the plate thickness of the girder, and it is possible to increase the number of mounting surfaces of the girder and other structures.

The staircase structure according to the third aspect has an excellent effect of suppressing the influence of the staircase member on the finishing material and improving the design of the staircase.

The staircase structure according to the fourth aspect has an excellent effect that the cost of the member can be suppressed.

It is a schematic side view which shows roughly the stairs to which the staircase structure concerning this embodiment was applied. It is a disassembled perspective view which shows the structure of the force beam and the stair member in the stair structure of this embodiment. FIG. 3 is a sectional view taken along line 3-3 of FIG. 2. FIG. 2 is an exploded perspective view showing the stairs shown in FIG. 1 and showing an upper end portion of an upper straight line portion shown by a region P in FIG. 1. It is a side view which shows the upper end part of the upper floor linear part shown in FIG. It is a staircase shown in FIG. 1, Comprising: It is a disassembled perspective view which shows schematically the lower end part of the upper floor linear part shown by the area|region Q in FIG. It is the staircase shown in FIG. 1, and is an exploded perspective view showing the lower end portion of the lower floor straight line portion shown by the region R in FIG. 1.

Hereinafter, the stairs 16 to which the staircase structure according to the present embodiment is applied will be described with reference to FIGS. 1 to 7.

As shown in FIG. 1, the stairs 16 are U-shaped stairs connecting the first floor and the second floor of the building 10. The stairs 16 includes an upper-floor linear portion 18 extending obliquely downward from the second-floor portion 12 of the building 10 and a lower-floor linear portion 20 extending obliquely upward from the first-floor portion 14 of the building 10. And a turning portion 22 that connects the lower end of the upper floor linear portion 18 and the upper end of the lower floor linear portion 20. The upper-floor linear portion 18 and the lower-floor linear portion 20 are composed of straight stairs and are arranged substantially parallel to each other in a plan view. The surrounding portion 22 is fixed to the pillar portion 24 of the building 10 by a mounting method (not shown), and the elevation direction is gradually changed by a plurality of treads so that the upper floor linear portion 18 and the lower floor linear portion 20 are seen in a plan view. They are connected in a substantially U shape.

(Basic configuration)
The straight stairs that constitutes the upper-floor linear portion 18 and the lower-floor linear portion 20 includes a pair of power girders 26 and a plurality of stair members 28 supported by the pair of power girders 26 from the lower side of the building. It is a steel-framed staircase. FIG. 2 is an exploded perspective view showing the structure of the pair of force beams 26 and the step members 28 that constitute the upper linear portion 18. The force beam 26 corresponds to the "beam" in the present invention.

As shown in FIGS. 2 and 3, the force beams 26 are arranged at both ends of the step member 28 so as to be inclined. The force beam 26 is made of so-called Z-shaped steel, and in a longitudinal sectional view, a web portion 26A extending in the building height direction and an upper flange extending at a right angle from the upper end of the web portion 26A. 26B and a lower flange 26C extending from the lower end of the web portion 26A in a direction opposite to the upper flange 26B. Thus, since the upper flange 26B and the lower flange 26C extending in opposite directions are formed from the upper and lower ends of the web portion 26A, the lower side of the upper flange 26B is opened to the lower side of the building. A space 30 is formed. In addition, in this embodiment, the upper flange 26B extends from the upper end of the web portion 26A to the outer side in the width direction of the stairs 16. Further, the lower flange 26C extends from the lower end of the web portion 26A to the inner side in the width direction of the stairs 16. In FIG. 3, the widthwise outside of the stairs 16 is indicated by an arrow OUT, and the widthwise inside of the stairs 16 is indicated by an arrow IN.

Further, the plate thickness t of the force beam 26 having the above configuration is set to 2.3 mm as an example.

As shown in FIG. 2, the upper flange 26B of the power beam 26 is provided with a plurality of holes 32 penetrating in the plate thickness direction of the upper flange 26B. A bolt 34 for bolting a step member 28, which will be described later, is inserted into the hole 32 from the lower surface side of the upper flange 26B.

The staircase member 28 is formed by bending a rectangular steel plate into a substantially L shape to form a top surface of the staircase member 28 and extending in a substantially horizontal direction, and a tip end of the stepboard part 36 (a step nose portion of the stepboard part 36). ), and a riser portion 38 is formed so as to hang substantially vertically downward. Further, the tread plate portion 36 and the riser portion 38 are bent to form a tread plate side flange 36A and a riser side flange 38A, respectively. Specifically, the tread side flange 36A is integrally formed at the rear end in the step width direction of the tread part 36, and extends obliquely toward the lower side of the stairs and the riser part 38 side in correspondence with the inclination direction of the power beam 26. ing. Further, the riser side flange 38A is integrally formed at the lower end of the riser portion 38 and extends obliquely toward the upper side of the stairs and the side of the tread plate portion 36 in accordance with the inclination direction of the power beam 26. In other words, the tread side flange 36A and the riser side flange 38A are arranged inside the treadle part 36 and the riser part 38.

Fastening holes 40 are formed at both ends in the width direction of the stairs 16 of the step board side flange 36A and the riser side flange 38A, respectively. The staircase member 28 is placed on the upper flange 26B of the power beam 26, the bolt 34 is inserted into the fastening hole 40 together with the hole 32 of the upper flange 26B, and is fastened with the bolt 34 and the nut 35 (see FIG. 5). .. Thereby, the staircase member 28 is fixed to the power beam 26.

As shown in FIG. 1, the staircase members 28 having the above configuration are attached to the upper flange 26B of the power beam 26 at equal intervals in the vertical direction. At this time, since the step plate side flange 36A and the riser side flange 38A are arranged inside the step plate portion 36 and the riser portion 38, the bolt 34 is not exposed on the surface of the step member 28. A finishing material 42 that constitutes a design surface is provided on the surfaces of the tread portion 36 and the riser portion 38.

Hereinafter, the configurations of the upper-floor linear portion 18 and the lower-floor linear portion 20 based on the above-described configuration will be described in this order.

(Upper straight section)
FIG. 4 is an exploded perspective view showing the structure of the upper end portion of the upper linear portion 18 (see the region P shown in FIG. 1). Further, FIG. 5 shows the structure of the upper end portion of the upper linear portion 18 in a vertical sectional view. In FIG. 1, the heat insulating material 54 is not shown for convenience of description. Further, in FIG. 4, the bolt 34, the nut 35, the finishing material 42, and the heat insulating material 54 are not shown.

As shown in these drawings, the upper end portion of the upper-floor linear portion 18 is fixed to a floor beam 44 that supports the second-floor portion 12 from the lower side of the building. The floor beam 44 is a so-called H-shaped steel, and in a longitudinal sectional view, a web portion 44A extending in the building height direction, an upper flange 44B extending from the upper end of the web portion 44A to the left and right sides, and a web portion. 44A is extended from the lower end to the left and right sides, and is provided with an upper flange 44B and a lower flange 44C which is arranged to face the building in the vertical direction.

A support member 46 extending along the extension direction of the floor beam is fixed on the lower flange 44C of the floor beam 44. The support member 46 is made of chevron steel, a base portion 46B extending in a substantially horizontal direction is bolted to the lower flange 44C, and a rising portion 46A extending in the vertical direction of the building has a lower flange 44C of the floor beam 44. It is erected along the periphery. A pair of mounting brackets 48 is fixed to both ends of the rising portion 46A in the longitudinal direction on the side surfaces facing the upper linear portion 18. The mounting bracket 48 is composed of a plate body bent in an L shape, and one side surface thereof is bolted to the rising portion 46A of the support member 46. The other side surface of the mounting bracket 48 is erected from both longitudinal ends of the rising portion 46A in a direction orthogonal to the rising portion 46A, and serves as a mounting seat surface 48A of the force beam 26.

The pair of force beams 26 are arranged from the outside of the pair of mounting brackets 48, and the web portion 26A of the force beam 26 and the mounting seat surface 48A of the mounting bracket 48 are fastened with bolts 56 and nuts 57 (see FIG. 4). ). Thus, at the upper end of the upper linear portion 18, the upper flange 26B of the power beam 26 serves as the mounting surface of the stair member 28, and the side surface of the web portion 26A is mounted on the stair 16 via the mounting bracket 48 and the support member 46. It is fixed to a floor beam 44 arranged above the building. The floor beam 44 corresponds to the "building structure" in the present invention.

Further, as shown in FIG. 4, in the upper linear portion 18, the step member 28 placed on the uppermost end portion of the power beam 26 has a notch portion 50 formed in the tread side flange 36A. .. The cutout portion 50 is formed to be long in the width direction of the stairs and is open to the lower side of the building. When the step member 28 is fixed to the power beam 26, the notch 50 forms a slit-like opening 52 between the upper end of the rising portion 46A of the support member 46 and the tread side flange 36A ( (See FIG. 5).

As shown in FIG. 5, the opening 52 is formed in the side surface and the lower surface of the floor beam 44 for disposing the heat insulating material 54. Specifically, after the heat insulating material 54 made of glass wool or the like is wound around one side surface of the floor beam web portion 44A and the lower surface of the lower flange 44C, the end portion of the heat insulating material 54 is inserted from the opening 52. However, it extends along the other side surface of the web portion 44A. In addition, since the opening 52 is formed by utilizing the notch 50 formed in the tread side flange 36</b>A arranged inside the tread 36 and the riser 38, the opening 52 is exposed on the surface of the staircase member 28. Not done. Therefore, even after the finishing material 42 is attached to the surface of the staircase member 28, it is possible to attach the heat insulating material 54 from the lower side of the power beam 26.

On the other hand, the lower end portion of the upper-floor linear portion 18 is fixed to a turning portion 22 that connects the upper-floor linear portion 18 and the lower-floor linear portion 20. Note that FIG. 6 is an exploded perspective view showing the schematic structure of the lower end portion of the upper linear portion 18 (see the area Q shown in FIG. 1). Further, in FIG. 6, a part of the turning portion 22 is shown by a chain double-dashed line. As shown in this figure, in the force beam 26 that constitutes the upper linear portion 18, the lower end portion that is bent from the middle extends substantially vertically downward and constitutes a fixed portion with the turning portion 22. doing. Specifically, the upper flange 26B of the power beam 26 serves as a mounting seat surface for the turning portion 22, and is fastened to the turning portion 22 using a bolt 58 and a weld nut (not shown).

(Lower straight section)
FIG. 7 is an exploded perspective view showing the structure of the lower end portion of the lower floor linear portion 20 (see the region R shown in FIG. 1). As shown in this figure, the lower end portion of the lower linear portion 20 is fixed to the first floor portion 14. Specifically, the lower end portion of the power beam 26 is fixed to the first floor section 14 via a pair of brackets 60. Each of the brackets 60 has a substantially L-shaped cross section, like the mounting bracket 48 described above. One side surface of the bracket 60 is bolted to the first-floor floor portion 14. The other side surface of the bracket 60 is disposed adjacent to the width direction outer side surface of the stairs of the web portion 26A of the power beam 26. In other words, the pair of brackets 60 is arranged outside the pair of force beams 26.

The web portion 26A of the force beam 26 and the bracket 60 are fastened by inserting a bolt 62 into a corresponding fastening hole (reference numeral omitted) from the width direction outer side of the staircase and screwing the weld nut 64. Thus, at the lower end portion of the lower floor linear portion 20, the upper flange 26B of the power beam 26 serves as the mounting surface of the stair member 28, and the side surface of the web portion 26A interposes the bracket 60, as in the upper floor linear portion 18. It is fixed to the first-floor floor portion 14 arranged below the building on the stairs 16. The first floor 14 corresponds to the "building structure" in the present invention.

Further, the upper end portion of the lower-floor linear portion 20 is fixed to the turning portion 22 similarly to the lower end portion of the upper-floor linear portion 18. The upper end portion of the power beam 26 that constitutes the lower linear portion 20 extends substantially vertically upward and is bolted to a mounting seat surface (not shown) of the turning portion 22.

(Action/effect)
Next, the operation and effect of this embodiment will be described.

In the staircase 16 to which the staircase structure according to the present embodiment is applied, in the upper floor linear portion 18 and the lower floor linear portion 20 formed as a straight staircase, a substantially rectangular flat plate is bent into a substantially L-shape to form a tread plate portion 36. A plurality of stair members 28 integrally formed with the riser 38 are provided. The staircase member 28 is supported from the lower side of the building by a pair of force beams 26 arranged at both ends in the longitudinal direction of the staircase width direction.

The force beam 26 is made of Z-shaped steel, and in a longitudinal sectional view, a web portion 26A extending in the building height direction and an outer side in the width direction of the stairs (separated from the web portion 26A from the upper end of the web portion 26A). Direction) and includes an upper flange 26B. Then, the step plate side flange 36A and the riser side flange 38A of the stair member 28 are placed on the upper flange 26B, and are fastened by the bolts 34 and the nuts 35.

Here, the remarkable point of the power beam 26 described above is that the workability of the stairs 16 is improved by utilizing the shape characteristics of the Z-shaped steel.

For example, when the power beam is made of channel steel, if the user tries to fix the stair member from the lower side of the upper flange, the operator's hand or tool may interfere with the lower flange, which may hinder the work. is there.

On the other hand, in the power beam 26 of the present embodiment, the space 30 that is open to the lower side of the building is formed below the upper flange 26B that is the mounting surface of the staircase member 28. As a result, the space 30 below the upper flange 26B is secured as a working space, so that a tool can be easily inserted from the lower side of the power beam 26 and workability is excellent.

Further, in the present embodiment, the force beam 26 and the step member 28 are fastened by the bolt 34 and the nut 35. Thus, for example, as compared with the configuration in which the step members are welded to the power beam, the tightening of the bolts 34 is adjusted and the leveling of the tread plate portion 36 is appropriately performed even after the step members 28 are fixed to the power beam 26. You can Further, since the power beam 26 and the staircase member 28 can be individually carried in, the member can be downsized at the stage of being transported to the construction site, and the transportation cost can be suppressed.

Further, in the present embodiment, since the upper flange of the power beam 26 extends from the upper end of the web portion 26A to the outer side in the width direction of the stairs, the work of mounting the stair member 28 should be performed outside the pair of power beams 26. It has a structure that makes it easier to secure a working space.

Further, in the present embodiment, the force beam 26 is made of Z-shaped steel, so that the cross-sectional rigidity is improved as compared with the case where the force beam is made of chevron steel or channel steel. For example, in the staircase 16 of the present embodiment, the plate thickness t of the force beam 26 is set to 2.3 mm, but in order to ensure equivalent rigidity with the force beam of channel steel, it is about 3.2 mm. Requires plate thickness. Thus, if the cross section of the power beam 26 is substantially Z-shaped, the rigidity of the stairs 16 can be ensured while suppressing the plate thickness of the power beam 26, and thus the weight of the stairs 16 can be reduced. You can

Further, since the upper flange 26B and the lower flange 26C extend in opposite directions, a working space is secured above the lower flange 26C in addition to the space 30 below the upper flange 26B described above. Therefore, the operator does not receive interference from the flange on the other side when working on either the upper or lower flange. Therefore, the operator should use the upper flange 26B and the lower flange 26C as a mounting surface for another structure. You can

Further, in the present embodiment, the step plate side flange 36A and the rise side flange 38A of the stair member 28 are arranged inside the step plate portion 36 and the rise portion 38. As a result, the step plate side flange 36A and the riser side flange 38A are not exposed on the surface of the step member 28, and these flanges do not interfere with the finishing material 42 set on the surfaces of the step plate portion 36 and the riser portion 38. As a result, the effect of the staircase member 28 on the finishing material 42 can be suppressed, and the design of the staircase 16 can be improved.

Further, as shown in FIGS. 4 and 5, in the present embodiment, the cutout portion 50 is formed in the tread side flange 36A, and the heat insulating material 54 can be arranged on the floor beam 44 below the staircase member 28. .. In this way, the tread plate side flange 36A and the riser side flange 38A are not exposed on the surface of the staircase member 28, so that the tread plate side flange 36A and the riser side flange 38A can appropriately adjust the accommodation with the building structure. it can.

Further, in the present embodiment, the side surface of the web portion 26A of the power beam 26 is fixed to the building structure arranged on the ascending and descending direction rising side and the ascending and descending direction descending side of the stairs 16. Specifically, in the upper floor linear portion 18, the side surface of the web portion 26A at the upper end portion of the power beam 26 is fixed to the floor beam 44. Further, in the lower floor linear portion 20, the side surface of the web portion 26A at the lower end portion of the power beam 26 is fixed to the first floor portion 14. As described above, in the stairs 16, the web portion 26A is used as a fixing portion to the building structure in addition to the upper flange 26B of the power beam 26. As a result, the mounting surface for the building structure or another member can be efficiently secured without complicating the shape of the power beam 26, and the cost of the member can be suppressed.

[Supplementary explanation]
In the above-described embodiment, the upper flange 26B of the power beam 26 is configured to extend from the upper end of the web portion 26A to the outer side in the width direction of the stairs. However, the present invention is not limited to this, and the upper flange may extend from the upper end of the web portion to the staircase. It may be configured to extend inward in the width direction. In this case, the lower flange is configured to extend from the lower end of the web portion to the outer side in the width direction of the stairs.

Further, in the above-described embodiment, the force beam 26 is the Z-shaped steel, but the present invention is not limited to this, and the force beam may be made of angle steel. Even in this case, the force beam has the web portion extending in the building height direction and the upper flange extending in the direction away from the web portion from the upper end of the web portion.

Further, in the above embodiment, the force girder 26 and the staircase member 28 are bolted together, but the present invention is not limited to this, and the upper flange of the power girder and the step plate side flange and the riser side flange of the staircase member are welded. May be fixed by. Even in this case, since a space is formed below the upper flange of the power beam, it is easy to secure the work space for the worker and the workability is excellent.

In addition, in the above-described embodiment, the power girder 26 and the staircase member 28 are applied to the upper floor linear portion 18 and the lower floor linear portion 20 of the staircase 16 which is a U-shaped staircase. Alternatively, it may be applied to the straight part of the staircase.

14 First floor (building structure)
16 stairs 26 power girders
26A web part 26B upper flange 26C lower flange 28 stair member 30 space 34 bolt 36 tread plate part 36A tread side flange 38 kicking part 38A kicking side flange 44 floor beam (building structure)

Claims (4)

A substantially rectangular flat plate is bent into a substantially L-shape to integrally form a tread portion and a riser portion, and a tread side flange integrally formed at a rear end portion of the tread portion and a riser side flange integrally formed at a lower end portion of the riser portion. A plurality of stairway members including and,
A pair of webs are arranged at both ends in the longitudinal direction of the staircase member and extend in the building height direction in a longitudinal sectional view, and a web portion extending from the upper end of the web portion in a direction away from the web portion. A pair of girders including a tread side flange placed from above and an upper flange to which the riser side flange is fixed, and a space open to the lower side of the building is formed below the upper flange. When,
Stair structure with. The girder comprises a lower flange extending from the lower end of the web portion in a direction opposite to the upper flange,
The staircase structure according to claim 1. The tread side flange and the riser side flange are arranged inside the treadle portion and the riser portion,
The staircase structure according to claim 1 or 2. In the girder, the side surface of the web portion is fixed to a building structure arranged on the ascending/descending side of the stairs or the ascending/descending direction of the stairs.
The staircase structure according to any one of claims 1 to 3.