JPH0826630B2 - Bent Sasara girder and stair unit using it - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improved shape of a sasara girder, which is one component of a staircase structure, and a staircase unit configured using the sasara girder.

[Conventional technology]

The most typical staircase structure is a straight staircase that goes up and down in one direction, and a stairway structure in which a landing is provided at an intermediate position of such a straight staircase is also widely known.

Also, as a structure used when the space inside the building is small and it is difficult to use the stair structure with only straight stairs,
For example, a crease staircase that changes the direction at a right angle in the middle position,
Folding stairs that turn in the opposite direction at a midway position are known. A landing is formed at the direction-changing position in these curved stairs and turn-up stairs.

FIG. 5 is an explanatory view showing the structure of a conventional straight staircase with a landing formed on the way. The sasara girders 10 are installed on both sides of the staircase part, and a staircase notch is formed on the upper end surface thereof. Are formed. And the horizontal end 10a of each notch
Step plates 12 are installed on each side, and riser plate 1 is provided on the vertical end 10b side.
4 are installed respectively.

A landing 16 is formed between the stepped portions. In this landing 16, an upper surface member 16a is formed of a single plate or a plurality of plate materials, and a supporting member 18 and a pillar 20 are installed to support a portion of the upper surface member 16a. That is, the landing 16 is supported as an intermediate part to stabilize the installation of the entire staircase structure.

In the case of another staircase structure having a landing part, that is, a bent staircase or a folded staircase, similarly, a support member such as a pillar is provided on the landing part.

[Problems to be Solved by the Invention]

However, in the above-described conventional stair structure, it is necessary to assemble members such as the sasara girder 10, the step plate 12, the riser plate 14, and the landing 16 on a support material such as a wall at the site one by one by nailing or the like. There were problems such as low efficiency and the need for advanced construction technology.

Further, in the above-mentioned conventional staircase structure having a landing, a supporting member for the landing is usually required, and when the landing area is large, as in the case of the folded staircase structure, a supporting member with sufficient supporting strength is required. Required. Therefore, since the number of members is increased and the structure is complicated,
There was a problem that the construction work time became long.

Further, since the support member is installed in the lower part of the landing, the space below the stairs is partitioned by this support member. Therefore, it is very difficult to secure the space under the stairs as wide as possible and use the space effectively.

(Object of the invention) The present invention has been made to solve the above problems, and an object thereof is to provide a staircase structure having a landing as a horizontal portion without providing a supporting member in the middle portion, The present invention provides a bent sasara girder and a staircase unit using the same.

[Means for solving the problem]

In order to achieve the above object, the bent sasara girder according to claim (1) is a sasara fixedly installed on a side surface of a landing plate member for supporting a step plate and a riser plate in a stepwise manner and horizontally supporting a landing member. The girder is composed of a plurality of sasara girder members divided in the longitudinal direction, and each sasara girder member is joined at its one end in the longitudinal direction to an adjacent end at an angle of a predetermined bending angle. A reinforcing member is fixed to the joint so as to maintain the angled state, and the bending angle is such that at least one of the continuous sasara girder members supports the stepped portion. , The other at least one sasara girder member is formed into a corner so as to support the horizontal landing portion.

Further, in the staircase unit of the present invention, the bent sasara girders according to claim (1) are arranged opposite to each other on both sides, and a step plate and a riser plate are mounted between the at least one girder sides of the both bent sasara girders. The landing member is mounted between the other at least one girder side.

[Action]

According to the bent sasara girder having the above configuration, a plurality of sasara girder members divided in the longitudinal direction are bent and joined at a predetermined angle (step inclination angle), and the joining portion is reinforced by the reinforcing member to ensure reliable joining. While maintaining the state, the stair slope part and the horizontal landing part can be supported and configured at the same time.
That is, the sasara girder having a function of supporting the staircase structure is a bent sasara girder so that the stair slope part and the horizontal landing part can be simultaneously supported.

Therefore, even if a landing is provided in a part, it is not necessary to install a member for supporting the part. Therefore, the number of members can be reduced and the construction process can be simplified. Further, since there is no supporting member in the lower part of the stairs, the space can be widely used.

Further, by using the bent sasara girder to form a possible structure having a landing structure in advance and forming a stair unit by the bent sasara girder, the stair structure can be further simplified.

〔Example〕

Preferred embodiments of the present invention will be described below with reference to the drawings.

First Embodiment The same elements as those in the conventional example shown in FIG. 5 are designated by the same reference numerals, and the description thereof will be omitted.

FIG. 1 shows a staircase structure formed by using a bent sasara girder according to the present invention. The bent sasara girder 22 constitutes both end portions of the stair structure, and the stair-like part and the landing part are installed between the two bent sasara girders 22. That is, the step plate 12, the riser plate 14, and the upper surface member 16a are clamped and fixed from both sides by the bent sasara girders 22.
This sandwiched condition must be sufficient to withstand the load on the stairs. Therefore, for example, when attaching the step plate 12 or the like to the bent sasara girder 22, a notch (not shown) for engaging the ends of the holding members (12, 14, 16a) with the bent sasara girder 22 in advance is provided. It is formed so as to be supported by the bent sasara girder 22 while engaging each holding member with the cutout portion.

Further, in order to secure an appropriate strength, a receiving material or the like (not shown) may be attached between the bent sasara girders 22 on the lower side of each holding member.

FIG. 2 is a schematic exploded view of the bent sasara girder 22 used in the staircase structure of FIG. As shown, this bent sasara girder 22 is a sasara girder member 24a that constitutes four girder sides.
24a to 24d, one end of each of these sasara girder members 24 is joined to the ends of the adjacent sasara girder members 24 at a predetermined bending angle. That is, the sasara girder members 24a and 24b, 24b and 24c, 24c and 24d,
Each is joined with an inclination angle that is the slope of the stairs.

Then, a gusset 26, which is a reinforcing member, is attached to each joint to maintain the jointed state. This gusset
26 has a pentagonal shape having corners adapted to the slope of the stairs, and various materials are used depending on the material of the sasara girder member 24. In this embodiment, the wooden sasara girder is used. Plywood gussets are used for member 24. The gusset 26 is attached by fixing it to the side surface of the joint portion of the sasara girder member 24 with a nail or the like.

Further, in order to more reliably maintain the bent joint state, in this embodiment, a triangular reinforcing plate 28 is attached to the lower side of the joint portion of each of the sasara girder members 24a and 24b and 24c and 24d. Further, a steel plate opening stopper 30 is fixed by a nail 32 on the lower side of the joint between the sasara girder members 24b and 24c.

By configuring the bent sasara girder 22 in this way,
It is possible to obtain the bent sasara girder 22 that can reliably hold the three bent portions. Then, the portions of the sasara girder members 24a and 24c support the step plate 12 and the riser plate 14 which are stepped portions,
The sasara girder members 24b and 24d support the landing member 16a which is a horizontal part.

As a result, the lower end X of the sasara girder member 24a and the one end Y of the sasara girder member 24d are fixed to the floor and the wall, respectively, and further, the sasara girder member 24 is fixed to the wall surface or the like at a plurality of positions as necessary. By doing so, the entire staircase structure can be fixed. Therefore, it is not necessary to particularly provide a support member such as a pillar on the lower side of the landing 16, and the lower space of the landing 16 can be widely used as a whole.

Second Embodiment FIG. 3 shows an example of a folded staircase which is another staircase structure using the bent sasara girder according to the present invention.

The staircase has two slopes 34 and 36 with different directional slopes between which a landing 16 is formed.

4 (A) and 4 (B) are views showing the configuration of the bent sasara girder 22 used in this staircase structure.
Shown is a bent sasara girder 22a attached to one side. This is two sasara girder members 24e and 24f
, And these sasara girder members are joined at a specified angle,
It is fixedly held by gusset 26. The sasara girder member 24e supports the landing 16, and the sasara girder member 24f supports the stepped portion. The materials and attachment of these members are the same as those of the attachment of the first embodiment.

Next, FIG. (B) shows a bent sasara girder 22 installed in the central part of this staircase structure, and three sasara girder members 24
g, 24h, 24i, and these are fixedly held by a gusset 26. That is, one end side of the three sasara girder members is joined in one direction in three directions, and the sasara girder member 24g supports the landing 16, and the sasara girder members 24h and 24i support the stair slope portions 34 and 36, respectively. are doing.

The vent sasara girder 22c installed on the other side of this staircase structure (see FIG. 3) has substantially the same structure as the vent sasara girder 22a shown in FIG. It is only upside down.

According to the staircase structure using the bent sasara girders 22a to 22c, the end portions Y1 of the sasara girder members 24e and 24g in the horizontal portion are
Is fixed to the wall 40 of the building using the receiving member 42, and the lower end X2 of the sloped sasara girder members 24f and 24h is fixed to the floor,
Further, by fixing the upper end Y2 of the sasara girder member 24i and the like to the floor portion of the second floor, the entire stair structure can be fixed.

As a result, similar to the staircase structure of FIG. 1, stairs can be installed without providing any supporting member below the landing 16. Therefore, it is not necessary to construct a complicated support structure, and the work is extremely simple, and the stairs lower space can be effectively used. In the case of such a structure like a folded staircase, the landing area 16 has a large area, so that there is a great advantage particularly in effective use of the space under the stairs.

By further manufacturing the staircase structure as described above in a factory, that is, as a staircase unit using bent sasara girders, the staircase construction work can be further simplified.

The bent sasara girder according to the present invention is not limited to the wooden one, and various materials such as steel can be used. In the case of steel, the sasara girder members can be welded to each other or can be integrally formed.

〔effect〕

As described above, according to the bent sasara girder and the staircase unit using the same according to the present invention, various staircase structures having a landing can be easily configured in a state in which the bent state is reliably maintained at the joint, and It can be installed easily. Further, since the supporting member does not exist in the lower part of the stairs, the space in that part can be effectively used.

[Brief description of drawings]

FIG. 1 is a perspective view of a staircase structure of the first embodiment using the present invention, FIG. 2 is an exploded explanatory view of a bent sasara girder used in the staircase structure of FIG. 1, and FIG. 2 is a perspective view of the staircase structure of the embodiment, FIGS. 4 (A) and 4 (B) are explanatory views of the bent sasara girder used in the staircase structure of FIG. 3, and FIG. 5 shows the structure of a conventional straight staircase having a landing. It is a perspective view. 12 …… corrugated board, 14 …… riser, 16 …… landing, 22 …… bent sasara girder, 24 …… sasara girder member, 26 …… gusset.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Shou 62-67036 (JP, U) Sui 59-51129 (JP, U) Sui 43-1419 (JP, Y2)

Claims (2)

[Claims] 1. A sasara girder which is fixedly installed on a side surface of a landing member for supporting a step plate and a riser plate in a stepwise manner and horizontally supporting a landing member. Each of the sasara girder members is joined at its one end in the longitudinal direction with its adjacent end at an angle of a predetermined bending angle to each other, and is joined to the joining part in the angled state. The reinforcing member is fixed so as to hold the bending angle, and the bending angle is such that at least one sasara girder member of the continuous sasara girder members supports the stepped portion, and at least another sasara girder member has a horizontal landing portion. A bent sasara girder characterized by having corners that support the. 2. The bent sasara girder according to claim 1 is disposed on both sides so as to face each other, and a step plate and a riser plate are mounted between the at least one sasara girder members of the both bent sasara girders and the other A stair unit comprising a landing member mounted between at least one sasara girder member.