JPH10227110A - Stair construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a creaky sound which occurs during the passage of a person by forming a notch for tightly fitting a tread at the rear end of the tread supporting surface of a stringer in a wooden stair having stringers for supporting both the sides of the treads and by definitively fixing the treads to the stringers with a relatively simple construction. SOLUTION: A wooden stair construction 10 comprises stringers 11 arranged at both the sides, treads 12 to be placed on the stringers, and risers 13 for connecting the upper and lower treads 12. The stringer 11 is made by laminating a plurality of plywood panels and adhering them with butt boards and decorative paper, upper part of the stringer is formed to a tread supporting surface 14, and a notch 15 is formed for tightly fitting the rear part of the tread 12 at the right angle portion at the rear. The notch 15 should have a depth suited for catching and fixing the tread 12 and be about 0.5 to 1.0 times the thickness of the tread 12. Also, rear parts at both the sides of the tread 12 should be tightly fitted to the a notch 15 in the stringer 11, and its rear end is fixed to the stringer 11. Also, the front portion of the tread 12 should be fixed to the stringer 11 by fittings located inside at both the sides and front parts of the tread 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a wooden staircase, and more particularly to a notch structure of a slab girder supporting both sides of a tread.

[0002]

2. Description of the Related Art As shown in FIG. 3, a slab 51 is used to support a step board 50 of a stair from both sides.
A step board mounting surface 52 is formed on the upper side of the sasara girder 51 in a step-like manner, and the step board 50 is placed on each of the step board mounting surfaces 52.
Are attached to form a wooden staircase 53. In addition, in the conventional stairs, the mounting of the tread plate 50 is fixed using a special metal fitting (not shown). In FIG. 3, reference numeral 54 denotes a riser.

[0003]

However, the wooden tread plate 50 is warped or bent due to changes in ambient temperature and humidity, and the tread plate 50 is simply mounted on the slab girder 51. After a long period of time, a floating occurs between the lower girder 51 and the lower girder 51. If a load is applied on the tread plate 50 when a person passes in this state, there is a problem that the tread plate 50 and the slab 51 are rubbed against each other and a treading occurs. The present invention has been made in view of such circumstances, and has as its object to provide a staircase structure that can reliably fix a tread plate to a slab and prevent a treading noise that occurs during traffic with a relatively simple structure. I do.

[0004]

According to the present invention, there is provided a semiconductor device comprising:
The staircase structure described above, in a wooden staircase having a tread plate on which a person rides and passes, and a sasara girder supporting both sides of the tread plate, behind a tread plate mounting surface of the sasara girder,
The footplate forms a notch that fits closely.

[0005] In the staircase structure according to the first aspect, the rear side of the step board mounting surface of the sasara girder supporting both sides of the step board,
Since the notch into which the tread plate fits closely is provided, the end of the tread plate is fixed to this portion. Therefore, it is difficult for the tread plate to float, and no treading occurs.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 and FIG. 2 are explanatory diagrams of a staircase structure according to an embodiment of the present invention.

As shown in FIGS. 1 and 2, a wooden staircase structure 10 according to one embodiment of the present invention comprises a sasara girder 11 arranged on both sides, a tread plate 12 placed thereon, And a riser 13 for connecting the upper and lower treads 12. Hereinafter, these will be described in detail.

The slab 11 is made by laminating a plurality of plywoods with a veneer or decorative paper adhered thereto, and has a stepped mounting surface 14 formed in a stepwise manner on an upper portion thereof. A cut 15 is formed in a right angle portion of the rear portion so that a rear portion of the tread plate 12, that is, a portion opposite to the nosing portion is closely fitted. The depth of the notch 15 is sufficient if it has a depth for hooking the tread plate 12, so that the thickness of the tread plate 12 is 0.5 to 1 mm.
About double.

The tread plate 12 is formed by laminating a plurality of plywoods having sufficient strength or by attaching a veneer or decorative paper to the surface of a thick particle board. The rear portions of both sides of the tread plate 12 are cut 1
5, and the rear end thereof is fixed to the slab girder 11. Further, the front portion of the tread plate 12 is fixed to the slab girder 11 from the inside by mounting brackets (not shown) provided at the front portions on both sides as in the conventional case. Therefore,
Since the tread plate 12 is completely fixed to the slabs 11 on both sides, even if the tread plate 12 warps or bends due to a change in temperature or humidity, no lifting or the like occurs, and thus no treading occurs. It has a structure.

[0010] The riser 13 is an MDF (medium fiber board).
The upper end thereof is fixed to the front end of the upper tread plate 12, and the lower end thereof is fitted into a mounting groove 16 formed at the rear of the lower tread plate 12. Here, it is also possible to securely fix the riser 13 to the upper and lower treads 12 by using an adhesive or the like, whereby the tread 12 can be more firmly fixed and the stomping during traveling is prevented. Can be.

In the above-described embodiment, the riser 13 for connecting the upper and lower treads 12 is provided, but the present invention is also applicable to a staircase structure in which the riser is omitted. In addition to the case where the notch 15 of the sasara girder 11 into which the rear part of the tread plate 12 fits penetrates in the plate thickness direction, the both ends of the rear part of the tread plate 12 are hooked at that part without penetrating in the plate thickness direction. The present invention is also applied to the case where only the cut is made.

[0012]

As is apparent from the above description, the staircase structure according to the first aspect has the rear portions on both sides of the tread plate closely fitted into the cuts formed in the slab, so that the tread plate may change due to changes in temperature or humidity. Even if warpage or flexure occurs, a staircase structure can be provided in which there is no lifting or gap, and consequently no stepping noise.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a staircase structure according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a staircase structure according to one embodiment of the present invention.

FIG. 3 is an explanatory view of a staircase according to a conventional example.

[Description of Signs] 10 Stair structure 11 Sasara girder 12 Tread plate 13 Raised plate 14 Tread plate mounting surface 15 Cut 16 Mounting groove

Claims (1)

[Claims] 1. a step board on which a person rides and passes;
A wooden staircase having a slab girder supporting both sides of the tread plate, wherein a cut notch into which the tread plate fits closely is formed behind a tread plate mounting surface of the slab girder.