JPH059581B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention makes it possible to form a folding staircase having a landing in the middle easily and with good construction efficiency, shorten the construction period of the staircase, and reduce costs. Regarding stair structure.

[Prior art]

To form a turning staircase connecting the lower and upper floors of a multi-story house, a landing is provided at the turning part.

For stairs with such landings, pillars to support the landing are erected at each corner of the landing, and treads are installed between the landing and the beams on the lower floor, and between the landing and the beams on the upper floor. It was erected with supporting stringers.

[Problem to be solved by the invention]

However, in the case of a structure in which each corner of the landing is supported by pillars, the number of pillars increases, leading to increased costs, and the appearance of the staircase also deteriorates due to the large number of pillars. Furthermore, since the framework of the landing is formed by beams connecting the pillars, the framework structure is complicated and requires time and effort to process.

In order to solve the above problem, as a result of intensive research, the inventor constructed a joint beam between the pillars, bent the joint beam into a dogleg shape, and formed both a landing and a staircase part at one end of the parallel beam. By connecting these, they discovered a staircase structure that could be formed with a small number of components.

The present invention aims to provide a staircase structure based on the above-mentioned structure, which can reduce costs and improve appearance.

[Means for solving problems]

In order to achieve the above object, in the stair structure of the present invention, a connecting beam is constructed between a pair of pillars erected at a distance, and a horizontal part for forming a landing is provided on one end, and a horizontal part is provided on the other end. said one end of a pair of upper stringers having a sloped part for forming a stairway extending upwardly to the upper floor; and a horizontal part for forming a landing at one end side, and forming a stairway extending downwardly to the lower floor at the other end side. One end of a pair of stringers on the lower floor each having a sloped portion is attached to the connecting beam, and a receiving frame is spanned over each horizontal portion of the stringer on the upper floor and the stringer on the lower floor.

[Effect]

Since the structure is such that one end of each of the stringers on the upper floor and the stringers on the lower floor are attached to the connecting beams installed between a pair of columns, each staircase section for ascending and descending can be installed without being restricted by the position of the columns. I can do it. Furthermore, the width of the stairs is not limited by the position of the pillars and can be set as appropriate.

In addition, each stringer on the upper and lower floors has a horizontal part for forming a landing and an inclined part for forming a staircase, so it is possible to create a landing and a staircase by simply erecting a pair of pillars. It can be assembled, and a folded staircase can be easily formed with a small number of members without requiring a separate framework for forming a landing.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings, taking as an example a case where it is formed as a staircase for a multi-story housing complex as shown in FIGS. 18 and 19.

In this embodiment, the stairs S are arranged in the center of the house,
It is formed as a bending staircase that connects the earthen floor C on the first floor and the floor D on the second floor, which are on the same level as the entrance, and has a landing B in the middle.

In the stair structure 1 of the present invention, a joint beam 4 is bridged between a pair of columns 2 and 3 arranged at a distance, and a pair of upper stringers 5 extending upwards are connected to the joint beam 4. , 6 and the downstairs stringers 7, 9 extending downwards are attached.

Further, the stringers 5 and 6 on the upper floor and the stringers 7 and 9 on the lower floor are provided with horizontal portions 10 and 12 for forming a landing B on the side of the connecting beam 4, respectively.

In this embodiment, the pillars 2 and 3 are arranged independently of the pillars for the frame of the house for the purpose of constructing stairs, and the pillar foundation F1
It stands on top and has a hollow square cross section.

The connecting beam 4 is arranged between the pillars 2 and 3 as shown in FIGS. It is bolted to a protruding beam connection fitting 22.

The board 21 is provided with four stringer mounting brackets 23 that protrude inward and connect the ends of the stringers 5 and 6 on the upper floor and the stringers 7 and 9 on the lower floor. A connecting fitting 24 for connecting the landing extension part B1 is provided protrudingly on the outer surface of the connecting member.

String girder 5 on the outer floor adjacent to one pillar 2
However, the stringers 6 on the inner floors are arranged inside the stringers 5 on the outer floors and in parallel with the stringers 5 on the outer floors.

The stringer 5 on the outer floor is a plate body bent in a dogleg shape, with a horizontal part on the side of the connecting beam 4 and an inclined part 11 extending obliquely upward from the horizontal part 10 on the other end side. The stringer 6 on the inner floor also has a dogleg shape with a horizontal section 10 and an inclined section 11 similar to the stringer 5 on the outer floor.

Further, the other ends of the sloped portions 11, 11 of the stringers 5, 6 on the outer and inner floors extend near the floor beam L. The upper floor beam L is made of I-shaped steel with flanges provided on the upper and lower sides of a web 26, and on the outer surface of the web 26, the above-mentioned stringer mounting bracket 23 provided on the joint beam 4 is attached.
A stringer connecting fitting 27 is disposed at a position opposite to.

The stringer connecting fitting 27 has a T-shape and includes a ledger piece 30 extending outward from a mounting piece 29 attached to the web 26 and bolted.

As shown in FIGS. 1 and 7, each end of the horizontal parts 10, 10 of the stringers 5, 6 on the floor is fixed to the connecting beam 4 by bolting to the stringer mounting brackets 23, 23, respectively. On the other hand, the inclined part 11,1
1, that is, the other end, are attached to the stringer connecting fittings 27, 2, which are attached to the upper floor beam L as shown in FIGS. 1 and 8.
It is fixed to the overhang piece 30 of No. 7 by bolting.

Therefore, the joint beam 4 has horizontal parts 10, 10 on one end side.
and an inclined part 1 that extends upward to the floor on the other end side.
Said one end of a pair of upper storey stringers 5, 6 having numbers 1, 11 is attached.

On the inclined part 11 of the stringer 5 on the outer floor, a plurality of tread mounting brackets 33 projecting inward and supporting the end of the tread 44 are horizontally aligned with the stair pitch and shaped like a step. provided. Further, a plurality of vertically oriented handrail fittings 34 are attached at intervals on the outer surface of the inclined portion 11, and the handrail K can be attached using the handrail fittings 34.

The sloped part 11 of the stringer 6 on the inner floor is formed symmetrically with the stringer 5 on the outer floor, and the tread plate mounting brackets 33 project inwardly and the handrail mounting brackets 34 project outwardly. and is provided.

The horizontal part 10 of the stringer 5 on the outer floor is provided with a support piece 36 that extends horizontally inward and over the approximate length of the horizontal part 10 and is spaced from the upper edge of the horizontal part 10. In addition, in the horizontal part 10 of the stringer 6 on the inner floor, the support piece 37 having the above structure is attached to the horizontal part 1.
The supporting piece 3 extends outward from 0.
A recess 39 is provided by notching above 7.

The outer lower level stringer 7 adjacent to the other column 3
However, inside the outer downstairs stringers 7 and in parallel with the outer downstairs stringers 7, inner downstairs stringers 9 are arranged, respectively.

The outer stringer 7 on the lower floor is a plate body bent in a dogleg shape and has a horizontal portion 12 on the side of the joint beam 4 and an inclined portion 13 extending diagonally downward from the horizontal portion 12 on the other end side. The inner downstairs stringer 9 also has a dogleg shape with a horizontal part 12 and an inclined part 11 similar to the outer downstairs stringer 7.

Further, the other ends of the sloped portions 13, 13 of the outside and inside downstairs stringers 7, 9 extend near the ground G.

As shown in Figs. 1 and 13, a stair foundation F2 for attaching a stringer is provided on the ground G, and the stair foundation F2
A flat base metal fitting 41 that is anchored to the base F2 is attached to the upper surface of the base F2.

The core ends, that is, one ends of the horizontal parts 12, 12 of the stringers 7, 9 on the lower floor are connected to the stringer mounting brackets 23,
By being bolted to 23, they are each fixed to the connecting beam 4.

On the other hand, at each end of the inclined parts 13, 13, that is, at the other end, there is a connecting piece 4 extending horizontally as shown in FIG.
2, 42, and each end of the stringers 7, 9 on the lower floor by inserting the bolts erected in the foundation metal fittings 41 into the bolt holes provided through the connecting piece 42 and fastening them with nuts. is fixed to the stair foundation F2.

Therefore, the joint beam 4 has horizontal parts 12, 12 on one end side.
and a sloped part 1 extending downward to the floor on the other end side.
Said one end of a pair of downstairs stringers 7,9 having 3,13 is attached.

The above-mentioned slope parts 13, 13 of the outside and inside downstairs stringers 7, 9 are provided with the above-mentioned upstairs stringers 5, 6.
While similar footboard mounting fittings 33 are provided facing each other, handrail mounting fittings 34 having the above configuration are provided on the outer surfaces of each of the inclined portions 13, 13.

The horizontal parts 12, 12 of the outside and inside downstairs stringers 7, 9 have support pieces 36, 37 similar to those of the upstairs stringers 5, 6 extending to the side, and the inside downstairs stringers 9. In the horizontal part 12 of the support piece 3
7 is cut out above, and a recess 39 similar to the stringer 6 on the inner floor is provided. In addition, between the stringer 6 on the inner floor and the stringer 9 on the inner lower floor, the 14th,
The connection is made by a U-shaped connection fitting 49 as shown in FIG.

The stringers 5 and 6 on the floor and the stringers 7 on the lower floor,
In each inclined portion 11, 13 of 9, a tread plate 44 as shown in FIG. 16 is installed between opposing tread plate mounting fittings 33, 33.

The tread plate 44 is supported at both ends by tread plate mounting brackets and is fixed to the tread plate 45. When the tread plate 46 is suspended, the upper end of the tread plate 46 hangs down from the tread plate 45, and the tread plate 45 is suspended. A rising piece 47 is raised at the other end.

The tread plate 44 includes a raised piece 47 and a tread plate 4 located above the tread plate 44, as shown in FIGS. 1 and 16.
By bolting the lower end of the stub plate 46 of No. 4, they are connected to form a step. Step board 45
Mortar M is placed on top and finished.

String stringers 5 and 6 on the floor, stringers 7 and 9 on the bottom floor
On each of the horizontal parts 10, 10, 12, 12, there is a support piece 36 whose both ends are arranged on opposing faces of the outer upper floor stringer 5 and the outer lower floor stringer 7, respectively.
36, the middle portions of which are fitted into the respective recesses 39, 39 of the inner upper floor stringer 6 and the outer lower floor stringer 9, and are placed on the support pieces 37, 37. The receiving frames 16... are bridged.

The receiving frame 16 includes a base plate 17 supported at both ends by the supporting pieces 36, and vertical pieces 19, 19 of a small height that rise and are continuous at both side edges 17a, 17a perpendicular to the stringers 5, 9 of the base plate. It forms a U-shape.

Further, base reinforcing bars 20 are arranged in a lattice pattern on the upper surface of the base plate 17 of the receiving frame 16 to reinforce the mortar M placed on the receiving frame 16.

In this way, each of the horizontal parts 10, 12 of the pair of upper stringers 5, 6 and the pair of lower floor stringers 7, 9
A landing B that is integrally connected to the inclined parts 11 and 13 is formed by the receiving frame 16.

In addition, the connection fittings 24 arranged on the outer surface of the joint beam 4 have landing extension portions B framed in a Y-shape.
1 is connected.

In addition, in the staircase structure of the present invention, by connecting the other ends of the stringers 7 and 9 on the lower floor to the floor beams on the middle floor, it is possible to create a staircase that connects the middle floor and the upper floor of a multi-story house. In addition, it is also possible to use shapes such as channel steel and I-beam steel instead of plates for the joint beams, stringers above stories, and stringers below stories. It can be transformed into various forms.

〔Effect of the invention〕

As described above, the stair structure of the present invention has a horizontal part for forming a landing on one end side and an inclined part for forming a staircase part on the other end side of the joint beam installed between a pair of columns. Since the structure connects one end of each of the stringers and the stringers below, it is possible to install each staircase section for ascending and descending without being restricted by the position of the column. It is sufficient to erect a pair of pillars that are formed as a single piece.
A folding staircase can be easily and inexpensively formed using a small number of members without requiring a framework for forming a landing, shortening construction period and cost, and improving appearance by simplifying the configuration.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a front view showing the joint beam, Figure 3 is its plan view,
Figure 4 is a side view, Figure 5 is a front view showing the stringers on the outer storey, Figure 6 is its plan view, and Figure 7 shows the connections between the columns, joints, and stringers on the upper floor. Figure 8 is an exploded perspective view showing the connection between the stringer on the floor and the upper floor beam, Figure 9 is a front view showing the outside stringer on the lower floor, and Figure 10 is its front view. ,
Figure 11 is a front view showing the horizontal part of the inner stringer on the lower floor, Figure 12 is its plan view, Figure 13 is an exploded perspective view showing the connection between the stringer on the lower floor and the stair foundation, and Figure 14 is FIG. 15 is a front view showing the connecting fittings, FIG. 15 is a plan view thereof, FIG. 16 is a cross-sectional view showing the attachment of the stringer and the tread, and FIG. 17 is a plan view showing the staircase formed by the structure of the present invention. Figure 18 is a front view showing an example of a house in which the structure of the present invention is adopted;
FIG. 19 is a cross-sectional view taken along the line XX. 2, 3... Column, 4... Joint beam, 5, 6... String girder on the floor, 7, 9... String girder on the bottom floor, 10,
12...Horizontal part, 11, 13...Slope part, 16...
...Uke frame, B...landing.

Claims (1)

[Claims] 1 A connecting beam is constructed between a pair of pillars erected at a distance, and one end has a horizontal part for forming a landing, and the other end has an inclined part for forming a staircase extending upward to the floor. The one end of the pair of upper stringers and the one end of the pair of lower stringers having a horizontal part for forming a landing on one end side and an inclined part for forming a staircase extending downwardly to the floor on the other end side. A stair structure in which a support frame is attached to each of the above-mentioned joint beams, and a support frame is spanned over each horizontal part of the above-mentioned upper and lower-floor stringers.