JPH0452333Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to treads for spiral staircases, which have been increasingly designed and constructed in recent years as staircases for buildings.

In other words, conventional stairs only function as part of a passageway within a building, and are installed in places surrounded by walls, where the stairs themselves are not only closed, but also store spaces and living spaces. Although it had the disadvantage of encroaching into the building and narrowing the usable space of the entire building, it completely removed the image of conventional staircases and removed walls and enclosures, opening up the top, bottom, left and right of the staircase, allowing it to function as a staircase. The spiral staircase was designed to give a third space rich in variety to the building while making full use of it.

However, in conventional spiral staircases, the ends of the treads made of the same material are welded and fixed to the shaft body made of a metal material such as galvanized steel plate to form the tread body. , stack the appropriate number of these tread bodies according to the floor height, move them in the left and right spiral direction for example by 23° to 30°, and assign them, insert the core shaft inside the shaft body, and attach each core to this core shaft. The step body is fixed by a fixing mechanism to form a spiral staircase. In addition, carpets, cushions, tiles, etc. are pasted with adhesive to the treads of the treads to form a non-slip part, but in conventional spiral staircases, the shaft body and the treads are attached to the ends of the treads. Since the parts are welded and fixed by welding, the welded parts may corrode during long-term use.
Incomplete welding can cause the treads to fall, resulting in personal injury. Especially when designing and constructing spiral staircases on the outside of a building, there is a risk that the welded parts can corrode due to wind and rain, causing serious damage. This was a serious problem for the design implementer as it could potentially cause an accident. Furthermore, in the case of conventional spiral staircases, carpets, cushion tiles, etc. are pasted with adhesive to prevent slipping, which causes the adhesive to peel off during use, which can also cause serious accidents. It was hot.

The present invention eliminates these drawbacks and is a spiral stair tread that is safe and easy to operate.
The configuration and effects will be explained below using preferred embodiments. Figure 1 is an overall side view of a spiral staircase constructed using conventional treads. In the figure, 1' is the tread body, 2' is the tread part, and 3' is the axis. . FIG. 2 is a partially longitudinal side view showing the structure of a conventional shaft core portion 3', in which 4' indicates a core body 5' and a fixing tool, respectively.

Fig. 3 is a plan view of the tread body according to the present invention, in which 1 is the tread body, 2 is the tread portion, 3 is the axis, 4 is the tread tread portion, and 5 is the top of the tread tread portion 4. In the patterned anti-slip pattern, reference numeral 6 indicates a threaded part for fitting formed on the outside of the upper part of the shaft core part 3. FIG. 4 is a bottom view of the main body 1 of the tread, in which 7 is the bottom of the tread, 8 is the step for attaching the cover plate, and 9 is the fitting screw part cut inside the lower part of the shaft core 3. It is shown. FIG. 5 is a side view of the stepped plate main body 1 of the present invention.

Figure 6 is a cross-sectional view taken along line A-A in Figure 3.
In the figure, reference numeral 10 indicates a connecting portion between the stepped plate portion 2 and the shaft core portion 3. Figure 7 is a front view. Figure 8 is a back view.

That is, using the step board body 1 as an example, copper (Cu) 0.040
%, silicon (Si) 0.080%, iron (Fe) 0.305%, manganese (Mn) 0.400%, magnesium (Mg) 4.800
%, zinc (Zn) 0.010%, nickel (Ni) 0.010%
Constructed by casting and molding. The load test result of the tread main body 1 constructed as a result shows that it can sufficiently withstand a load of 500 kgf, and is the most suitable structure as a tread for a spiral staircase. Furthermore, since the stepped plate part 2 of the present invention is integrally formed with the shaft core part 3 by casting as described above, the connection part 10 is made by welding the conventional stepped plate part 2' and the shaft core part 3'. This helps prevent accidents caused by breakage and falling off of the tiers due to the corrosion of the welded parts during use, as in the case of welding and fixing, and enables safe use over a long period of time. Furthermore, it is customary for the treads used in conventional spiral staircases to have carpet cushion tiles or the like adhered to the tread surface of the tread portion 2' with adhesive to prevent slipping. However, this also has the disadvantage that it often peels off, causing serious accidents when passersby trip over it.Furthermore, it is necessary to wash the carpets each time they are soiled, and it requires a great deal of time and effort to preserve them in their current state. However, in the case of the present invention, since the step plate part 2 is molded integrally with the shaft core part 3 by casting,
Even if a spiral staircase is designed and constructed on the outside of a building, the joint between the axis and the steps will not be damaged by wind and rain, and the design and construction can be carried out safely. The tread portion 4 of the plate portion 2 is formed by forming a free pattern on a sand mold during casting.
Since it is cast directly onto the tread surface 4 of the stepped plate section 2, it does not peel off during use, unlike the carpets mentioned above, and even if it gets dirty, it can be easily cleaned and restored to its original shape. . Furthermore, when designing and implementing a spiral staircase using the conventional tread bodies 1', the tread bodies 1' are stacked at their axes 3' as shown in FIG. It is necessary to select an angle suitable for the 30° left and right helical direction, move it, and firmly connect the core body 4' in the shaft core part with the fixing tool 5', and this work requires considerable effort even by skilled workers. The drawback was that it required effort and time. In such a case, in order to design and implement a spiral staircase using the treads 2 of the present invention, the shaft core portions 3 of the tread bodies 1 are stacked together, and the fitting screw portion 6 carved on the outside of the upper part is used. It is screwed into the fitting screw part 9 carved inside the lower part of the shaft core part 3 of the stepped board main body 1 which is stacked together. That is, the fitting screw parts 6 and 9 can be screwed in the left and right spiral directions by a simple operation by selecting in advance a combination of the stepped plate bodies 1 to be fixed at an appropriate angle within the range of 23° to 30°. The structure is such that the moved step board bodies 1 can be piled up to design and execute a spiral staircase.

As detailed above, the spiral stair tread of the present invention allows spiral staircases to be designed and implemented with simple operations, and furthermore, the tread and the shaft core are integrally molded by casting. This prevents corrosion due to wind and rain during use, and the patterned anti-slip pattern on the tread surface is molded integrally with the tread body.
These treads have features not found in conventional spiral staircase designs, such as eliminating the labor involved in attaching conventional carpets and allowing free selection and use of patterns.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of a spiral staircase, Fig. 2 is a partial longitudinal side view showing the internal structure of conventional tread bodies stacked together, and Fig. 3 is a plan view of the tread bodies of the present invention.
4 is a bottom view of the same, FIG. 5 is a side view of the same, FIG. 6 is a longitudinal sectional view taken along line A-A of FIG. 1, FIG. 7 is a front view of the same, and FIG. 8 is a back view of the same. 1, 1'...Step plate main body, 2, 2'...Step plate part,
3, 3'...Axis core part, 4...Step plate tread part, 4'...
Core body, 5... Patterned anti-slip, 5'... Fixing tool, 6
...Screw part for fitting, 7... Bottom part of step plate, 8... Step part for attaching cover plate, 9... Thread part for fitting, 10... Connection part.

Claims (1)

[Scope of utility model registration request] It is characterized by integrally molding a stepped part having a patterned anti-slip part on the tread part, a shaft part having a threaded part for fitting carved into the outer side of the upper part of the upper and lower parts, and the inner part of the lower part by casting. Spiral staircase treads.