JPS5837468B2 - Circulating staircase construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of constructing a winding staircase, and relates to a method of constructing a staircase that can be constructed either counterclockwise or clockwise.

Conventionally, as a structure for constructing both clockwise and counterclockwise staircases, the structure shown in Japanese Utility Model Publication No. 50-25061 has been proposed.

However, if the lower and upper treads were made to have the same shape as shown in this publication, there was a drawback that the recessed portion of the center column into which the lower tread was hooked could be seen from the top of the stairs.

Furthermore, between the top tread and the middle tread of the round staircase,
It is necessary to install a riser between the middle tread and the lower tread, and the front edge of the upper tread protrudes further forward than the back edge of the middle tread; Since the treads on the lower tier protrude toward the front from the rear edge, it was not possible to make the shapes of the recesses for hooking the treads on the upper and lower tiers the same.

For this reason, in order to use both the treads for counterclockwise stairways and those for clockwise stairways, each stairway board is used by turning it inside out for counterclockwise and clockwise stairways.

However, in order to use it upside down, both sides must be finished so that it can be used as a surface, which is difficult to do with plywood or the like where high quality material is used only on one side.

The present invention was invented in view of these circumstances, and the recess for the upper stage of the support and the recess for the lower stage may have different shapes. The purpose of this paper is to provide a method of constructing a round staircase.

The construction method of the present invention will be explained below based on an embodiment shown in the drawings.

Fig. 1 shows a central pillar constructed for a three-step round staircase, and the central pillar 1 has recesses 2ay2by2c for hanging treads at appropriate intervals above and below, and kicks provided between the treads of each step. Insertion holes 3a, 3b, and 3c are formed in the inserting plates.

The upper recess 2a and the insertion hole 3a are formed in a symmetrical shape, and the middle and lower recesses 2b, 2c and insertion holes 3b, 3c are formed in pairs at symmetrical positions, It is designed to be applicable to both counterclockwise and clockwise staircases.

To construct, for example, a clockwise staircase using this center column 1, first place the center column 1 at one corner of the rectangular base plate 4, and place it opposite to this corner, as shown in FIG. On 2 sides, on the upper edge, the upper tier and the middle tier B, or the middle tier B and the lower tier C.
A foundation framework was constructed by arranging panels 5 and 6 with stepped sections, and then, as shown in Figure 3, a right-angled rectangular plate was divided into equal angles of 30° from one corner. Treadboards 7, 8, 9
, and its end edges 7a, 8a, 9a sides are connected to the step portions A, B,
C, and the sharp ends 7b, 8b, 9b are hooked and fixed to the recesses 2a, 2b, 2c of the center column, thereby placing it on the foundation framework, and furthermore, between each tread plate 7, 8.9 and A riser board 10 is provided at the bottom of the lower step board 9 (however, the one between each step board is not shown).

).

In constructing this frame, since the ends 7b, 8b, 9b of the tread are sharp, in order to fit them into the recesses 2a, 2b, 2c of the central column 1, the ends 7b, 8b, 9b are arranged as shown in FIG.
B, C or bold lines l, m in Figure 5 A, B', C
, n, and for this cutting, the present invention uses a paper pattern pre-made in the shape to be cut, and uses the paper pattern to cut the treadboard ends 7b, 8b, 8b,
Step board ends 7b, 8 along the pattern by attaching them to 9b, etc.
b, 9b only need to be cut.

Although this pattern is not shown, the thick lines 7, m,
The shape is the same as either the shape shown by n or the shape of the side to be removed by cutting as shown by the broken line in the figure.

If the shape is the same as the thick lines #, m, and n, the pattern should be one that imitates only the tread end portions 7 b t 8 b and 9 b, and a large pattern that is the same as the overall shape of the tread board should be made. There is no need to do so.

Further, the paper pattern can be made of ordinary thin paper or a thin plate made of plywood or resin.

Note that the shaded area 11 in FIGS. 4A and 5A is a part of the upper end of the support column, and this part is cut off in order to stably hold the tread end 7b.

Furthermore, although the illustrated example has been described with respect to a clockwise staircase, the construction method of the present invention can also be applied to a counterclockwise staircase since the end portions of each tread are cut.

In this case, the cutting shape of the end of the tread for the counterclockwise staircase is exactly the same as the shape of the end of the tread for the clockwise staircase turned upside down, so the pattern does not have to be made separately for the counterclockwise and clockwise directions. It is sufficient to make a paper pattern of the same shape by writing an identification character symbol such as "clockwise rotation" on the back side and "counterclockwise rotation" on the back side, or by color-coding the front and back sides.

As explained above, the present invention consists of a central pillar in which the recesses for tread plate latching of each stage are symmetrically shaped so that the tread plate can be latched either counterclockwise or clockwise on the side surface, and an upper stage and a symmetrical right triangular shape. The treads used for the lower tier, the tread-shaped treads used for the middle tier, and the recesses for latching the treads on the pillars are formed to match, and one side displays a clockwise indication and the other side displays a counterclockwise indication. When attaching the treads to the center post, use the pattern to align the treads with the clockwise markings for clockwise staircases, or the counterclockwise markings for counterclockwise staircases. Since it is machined, even if the upper and lower tread plate recesses of the support have different shapes, or even if only one side of the tread plate can be used as a surface, It can be used for both clockwise and counterclockwise staircases.

In other words, the recesses for hanging the treads are symmetrically shaped in the center column, and the treads used for the upper and lower steps are shaped into symmetrical right triangles, so when constructing a clockwise staircase, the treads used for the lower step cannot be used. are used for the upper tier when constructing a counterclockwise staircase; conversely, the treads used for the upper tier when constructing a clockwise staircase can be used for the lower tier of a counterclockwise staircase.

Moreover, since the end of the step board is cut using a paper pattern, it can be easily made.

In addition, the pattern is shaped to match the recess for the treadle on the support, and one side shows the clockwise direction and the other side shows the counterclockwise direction. This has the effect that it can be easily distinguished from the footboard of the case.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the central column, Figure 2 is a perspective view showing the basic framework of the round staircase, Figure 3 is a perspective view of the treads, Figure 4A,
B, C and FIG. 5 are views showing the cutting shape of the end of the treadle. 1... Central pillar, 2a, 2b, 2c...
Concave doctor 7, 8, 9...Treadboard, 7b, 8b, 9
b...Tread end.

Claims (1)

[Claims] 1. A central column with symmetrically shaped recesses for tread plate latching on each step so that it can be latched either counterclockwise or clockwise on the side;
A tread plate shaped like a symmetrical right triangle and used for the upper and lower tiers,
Uses a cross-shaped tread for use in the middle step, and a paper pattern shaped to fit the recess for latching the tread on the support, with clockwise indications displayed on one side and counterclockwise indications on the other side. However, when attaching the treads to the center post, use a pattern to cut the treads so that they are aligned with the surface marked clockwise for clockwise stairs, and aligned with the surface marked counterclockwise for counterclockwise stairs. Features a rotating staircase construction method.