JPH0427946Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a staircase with excellent construction properties.

[Conventional technology]

One type of stair structure that has been widely constructed in the past is the stringer staircase, which has stringers on both sides with a stepped upper end face formed into a step shape, and the horizontal end faces of the steps facing each other on the left and right. Stepboards are successively installed and supported in between.

[The problem that the idea aims to solve]

However, when forming such stairs,
Since the riser height had to be determined from the floor height and notches had to be cut into the stringers and treads on site,
The work becomes complicated and requires advanced technology,
Furthermore, there was a problem in that it took a long time to install because it took time and effort to ink the girders.

The present invention aims to solve these problems and provide a staircase with excellent construction properties.

[Means to solve the problem]

In order to achieve the above purpose, the stairs of the present invention are
In a staircase formed by sequentially fixing a plurality of treads 3, 3...3 to a girder member 1 at predetermined riser heights,
A longitudinally continuous groove 2 is carved in the center of the inclined upper surface of the girder member 1, and within this groove 2 is a lower end of a support member 5 that is fixed to the lower surface of the footboard 3 and holds the footboard 3 horizontally. In addition to being fitted, a riser height adjustment intermediate member 8 is interposed and fixed in the groove 2 between the opposing surfaces of the lower end portions of the support plates of adjacent treads 3, thereby fixing the lower end of the support member 5. That is.

[Effect]

If the lower end of the support member 5 of the footboard 3 and the intermediate member 8 are inserted into the groove 2 of the girder member 1 in turn, the intermediate member 8 will be inserted between the front and rear end surfaces of the support members 5, 5 of the adjacent footboards 3, 3. The front and rear end surfaces of are in contact with each other,
The respective footboards 3 are arranged on the girder member 1 at riser height intervals corresponding to the lengths of the support member 5 and the intermediate member 8.

In this way, if the intermediate member 8 interposed between the lower end facing surfaces of the support members 5, 5 of the footboard 3, which is inserted into the groove 2 of the girder member 1, is fixed to the girder member 1 with screws etc., the support material 5 is fixed in place.

At this time, if the groove 2 provided in the girder member 1 is formed into a dovetail groove and the dovetail-shaped protrusion formed at the lower end of the support member 5 of the tread plate 3 is fitted into the dovetail groove, the tread plate 3 can be The footboard 3 can be fixed in a state where it will not come off from the dovetail groove simply by fixing the intermediate member 8 without fixing it to the girder member 1 with screws or the like.

The riser height of the footboard 3 can be adjusted by the length of the intermediate member 8, and if the length is shortened, the riser height can be lowered, and if the length is lengthened, the riser height can be increased.

〔Example〕

The embodiments of the present invention will be explained with reference to the drawings: 1
is a girder member made of square timber with a vertically elongated cross section, and in the figure, it is arranged as a middle girder in an inclined state at a desired angle, and a dovetail groove 2 is carved in the center of the inclined upper surface over the entire length. At the same time, the opening end of the dovetail groove 2 is formed into a groove portion 2a whose opposing wall surfaces are parallel.

Reference numeral 3 denotes a step plate disposed on the girder member 1 at each predetermined riser height, and a dovetail groove 4 is carved in the center of the lower surface from the front end surface to the vicinity of the rear end surface.

Reference numeral 5 denotes a support material inserted and fixed to the upper end of the dovetail groove 4, which is an inverted triangular block or thick plate whose upper end surface is formed in a horizontal plane. Dovetail-shaped protrusions 6 and 7 are provided in the center of one of the inclined end faces, which is inclined at an angle equal to 100 degrees, in the front-rear direction. The support member 5 is attached to the lower surface of the footboard 3 in a hanging state by inserting and fixing it into the support member 4, and the inclined dovetail protrusion 7 is inserted into the dovetail groove 2 of the girder member 1.

8 is a rod-shaped intermediate member having an appropriate length and having the same cross-sectional shape as the dovetail groove 2 excluding the groove portion 2a of the girder member 1;
It is inserted into the dovetail groove 2 of the girder member 1 between the opposing surfaces of the lower ends of the supporting members 5 of the vertically adjacent tread plates 3, 3, and the supporting members 5 of the upper and lower tread plates 3, 3 are provided on the front and rear end surfaces thereof. It is fixed to the girder member 1 with nails 9 or the like with the opposing surfaces of the lower end thereof in contact with each other.

Therefore, the plurality of treads 3 are arranged at predetermined riser heights via the intermediate member 8 fixed in the dovetail groove 2 of the girder member 1, and the height of the riser is greater than the intermediate member 8.
It is adjusted by the size of the length.

10 is a decorative fillet placed on the upper surface of each intermediate member 8 and fitted into the groove portion 2a of the dovetail groove 2;
Its upper surface is flush with the inclined upper surface of the girder member 1 and covers the fixing screw head of the intermediate member 8.

In order to construct a staircase configured in this manner, firstly, the upper and lower treads 3, 3 are fixed in sequence to the girder member 1 disposed between the upper and lower floors.
The length of the intermediate member 8 is adjusted by cutting or the like so that the gap has a desired riser height, and the intermediate member 8 is provided at the upper end of the support member 5 in the dovetail groove portion 4 on the lower surface of each footboard 3,3. The horizontal dovetail protrusions 6 are fitted and fixed.

Next, by sequentially inserting the inclined dovetail-shaped protrusions 7 of the support member 5 of the footboard 3 and the intermediate member 8 into the dovetail groove 2 of the girder member 1 from the open end of the dovetail groove 2, the adjacent footboards 3, The front and rear end surfaces of the intermediate member 8 are in contact with the front and rear opposite end surfaces of the inclined dovetail-shaped protrusions 7, 7 of the supporting members 5, 5 fixed to the support members 3, respectively, and each footboard 3 has a shape corresponding to the length of the intermediate member 8. They are arranged on the girder member 1 at every riser height interval.

In this way, if the intermediate member 8 interposed between the lower end facing surfaces of the support members 5, 5 of the footboard 3, which is inserted into the dovetail groove 2 of the girder member 1, is fixed to the girder member 1 with screws etc., the support material 5 is fixed at a predetermined position.

At this time, since the support member 5 of the footboard 3 has its inclined dovetail-shaped protrusion 7 fitted into the dovetail groove 2 of the girder member 1,
There is no risk of the intermediate member 8 coming off the dovetail groove 2, and the intermediate member 8 can be fixed at a predetermined height position simply by fixing it to the beam member 1. Note that the fixation of the intermediate member 8 is as follows:
If adhesive is applied to the intermediate member 8 in addition to fixing with screws, nails, etc., even stronger fixing can be achieved.

The horizontality of the tread 3 may be set so that the angle formed by the horizontal dovetail-shaped protrusion 6 and the inclined dovetail-shaped protrusion 7 of the support member 5 is equal to the arrangement angle of the girder member 1. If the construction angle changes, it can be adjusted by cutting the supporting material 5 appropriately or by attaching a spacer member.

That is, when the angle of the stairs is small, the upper end or the inclined end of the support member 5 having the dovetail protrusions 6 and 7 is cut off by the portion corresponding to the reduced angle, and then the dovetail protrusion is formed on the cut end surface. If the angle of the stairs increases, a wedge-shaped spacer member 11 having an angle corresponding to the increased angle is formed as shown in FIG.
Dovetail-shaped protrusions 12 and 13 are formed at the center of the upper and lower surfaces of 1 to fit into the dovetail grooves 4 of the footboard 1 and the dovetail grooves (not shown) carved on the upper surface of the support member 5, respectively. Just leave it there.

Note that the support member 5, intermediate member 8, decorative fillet 10, etc. can be formed from any suitable material such as aluminum or steel in addition to wood.

In addition, in the above embodiment, a staircase with a structure in which one girder member 1 is used and arranged as a middle girder at the center of the lower surface of the tread plate 3 has been described, but two girder members 1 are arranged side by side and the tread plate It is also possible to install supporting members 5 on both sides of the lower surface of the girder members 1, 1 to be inserted and supported in the dovetail grooves 2 of the girder members 1, 1 to form a staircase structure.

Further, the footboard 3 and the support member 5 can be fixed to each other by other fixing means without using the dovetail joint means, and the fitting between the girder member 1 and the support member 5 is limited to the above-mentioned dovetailing means. It may be a normal groove instead of a groove. In this case, the supporting material 5 may be fixed to the groove by nailing, gluing, or the like.

[Effect of idea]

As described above, according to the stair structure of the present invention, in a staircase in which a plurality of treads 3, 3...3 are sequentially fixed to the girder member 1 at predetermined riser heights, A groove 2 continuous in the length direction is carved in the center of the upper surface, and a support member 5 is installed in this groove 2 to fix to the lower surface of the footboard 3 and hold the footboard 3 horizontally.
The lower ends of the adjacent tread plates 3 and 3 are fitted together.
Since the riser height adjustment intermediate member 8 is interposed and fixed in the groove 2 between the opposing surfaces of the lower end of the support member 5 and fixes the lower end of the support member 5, the lower end of the support member 5 of the footboard 3 and The plurality of tread plates 3, 3...3 of the girder member 1 can be adjusted according to the length of the intermediate member 8 by simply inserting the intermediate members 5 into the grooves 2 of the girder member 1 while sequentially abutting them. It can be easily arranged at each riser height interval without requiring any technique, and by fixing the intermediate member 8 to the girder member 1, the tread plate 3
can be fixed in place.

Further, the riser height of the tread plate 3 can be adjusted by the length of the intermediate member 8; by shortening the length, the riser height can be lowered, and by making it longer, the riser height can be increased. Adjustments can also be made easily.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention: Fig. 1 is a partially sectional side view, Fig. 2 is a front view thereof, Fig. 3 is an enlarged longitudinal sectional front view of the main part, and Fig. 4 is a support member. FIG. 5 is a perspective view of the spacer member. 1...Girder member, 2...Dovetail groove, 3...Treadboard, 4
...Dovetail groove, 5... Supporting material, 6, 7... Dovetail-shaped protrusion, 8... Intermediate member.

Claims (1)

[Claims for Utility Model Registration] A staircase in which a plurality of treads 3, 3...3 are sequentially fixed to a girder member 1 at predetermined riser heights, wherein A continuous groove 2 is carved in the length direction, and the lower end of a support member 5 that is fixed to the lower surface of the footboard 3 and holds the footboard 3 horizontally is fitted into the groove 2.
A staircase characterized in that a riser height adjusting intermediate member 8 is interposed and fixed in the groove 2 between the opposing surfaces of the lower ends of the supporting members of adjacent treads 3, thereby fixing the lower end of the supporting member 5. The staircase according to claim 1, wherein the groove 2 provided in the girder member 1 is a dovetail groove, and a dovetail-shaped protrusion 7 formed at the lower end of the support member 5 of the tread plate 3 is fitted into the dovetail groove.