JPH0334426Y2 - - Google Patents

Description

[Detailed description of the invention] (1) Industrial application field The present invention relates to an improvement of a prefabricated spiral staircase that is easy to construct.

(2) Prior Art One of the known prefabricated spiral staircases is shown in FIG. This staircase consists of an upright column 1, a plurality of tread units 2 each having a vertical cylindrical body 2a with a hole diameter slightly larger than the outer diameter of the column fixed to one end, and fan-shaped tread units 2 at the other end, and the outer end thereof. It consists of a handrail 3 with support attached to it and a cap 4 with support supporting the upper end of the column. To assemble it, fit the cylindrical body of the tread unit onto the column, and after adjusting the riser height, drive the pin 5 that engages the cylindrical body and the column from the outside of the cylindrical body. Therefore, at the same time that the tread unit is stopped from rotating, the pin serves as a fulcrum for vertical rotation due to the unit's own weight, so the lower edge of the hole in the cylindrical body 2a on the tread side and the upper edge on the opposite side come into pressure contact with the column. , the treadle unit is supported in a fixed position by the surface pressure. Therefore, this type of staircase has excellent construction properties and is suitable for mass production.

(3) Problems to be solved by the invention By the way, in the above-mentioned staircase, if lighting lights are attached to the bottom surface or cylindrical body of the tread units of each step or steps at regular intervals, the lighting lights will spread around the pillars. Because they are arranged in a spiral, they create a chandelier-like feel and provide excellent lighting for interior decoration.

However, in the conventional staircase of this type, there is no gap between the pillar 1 and the cylindrical body 2a through which the electric wire can be passed;
Since the pillars use pipes, it is very difficult, but not impossible, to run the wires through them, so it is possible to use such a method.
In this case, it is necessary to drill holes for the electric wires in the pillars on site to match the orientation of the treads, which reduces construction efficiency, so the lighting wiring must be routed along the outside of the component. Therefore, there was a drawback that the appearance of the stairs was spoiled when lighting lights were attached.

(4) Means for Solving the Problems The present invention provides a prefabricated spiral staircase that has good workability and allows electrical wiring for lighting lights to which tread units are attached without damaging the finished appearance. The support for externally fitting the cylindrical body of the stepboard unit has a circular convex portion at one end, a circular concave portion at the other end that fits and receives the convex portion, and a plurality of elongated holes for leading out electric wires extending in the vertical direction in the middle. The height of the cylindrical body of the step board unit matches the long hole of the cylindrical body of the support, and the electric wire passed through the support is connected to the height of the cylindrical body of the stepboard unit. It is characterized in that it has a lead-out hole that leads to the outside through the hole.

That is, with the above-mentioned configuration, by rotating the cylindrical body of the support column in accordance with the orientation of the tread plate unit, the position of the elongated hole of the cylindrical body can be aligned with the electric wire lead-out hole of the cylindrical body of the tread plate unit. Therefore, hole machining by on-site alignment becomes unnecessary, and it becomes possible to easily and quickly construct a good-looking spiral staircase with electric wiring for illumination lights built into the pillar.

(5) Embodiments Hereinafter, embodiments of the stairs of the present invention will be explained based on the attached FIGS. 1 to 5.

As shown in FIG. 1, an exemplary spiral staircase strut 1
0 is a plurality of cylindrical bodies whose outer diameter is slightly smaller than the hole diameter of the cylindrical body 21 vertically attached to one end of the tread unit 20, and whose total height H is approximately equal to the assumed maximum riser height of the stairs. It is formed by adding pieces as shown in the figure. That is, as shown in FIG. 2, the lower end portion of the cylindrical body 11 is provided with a circular convex portion 12 having a smaller diameter than the intermediate portion, and this convex portion is provided at the upper end of the lower cylindrical body 11 in a circular concave portion 13. The required number of cylindrical bodies are made into one pillar by tightly fitting them into each other. This cylindrical body 11 is further provided with a long hole 14 extending in the vertical direction in the middle part avoiding the uneven portion.

On the other hand, the footboard unit 20 has holes 22 for leading out electric wires which are inserted into the inside from appropriate locations on the outer periphery of the cylindrical body 21.
There is no difference from the conventional method except for the addition of .
The cylindrical body 21 of this unit is fitted onto the column 10 at the location where the elongated hole 14 exists, and the pin hole 23
It is secured to the column by a pin 24 (FIG. 3) which is inserted into the column (FIG. 1) and engages the column at one end.

The elongated hole 14 of the cylindrical body 11 constituting the above-mentioned support column is
This is provided to draw out the electric wire that passes inside the column from one of the upper and lower ends to the outside.The reason why this is extended in the height direction is to adjust the height of the riser so that the electric wire outlet hole on the treadle unit side can be extended in the vertical direction. This is to absorb positional deviation.

Furthermore, the reason why the support column is divided is that the position of the elongated hole 14 is changed in the circumferential direction by the rotation of the cylindrical body 11, and the hole is connected to the hole 22 of the stepboard unit as shown in FIG.
By making the position of the elongated hole freely changeable within a 360° range, it is possible to attach the lamp A to the bottom of the footboard as shown in Figure 1, or to When the electric wire is attached around the cylindrical body 21 as shown in the figure, the elongated hole 14 and the hole 22 can be aligned to allow the electric wire to be drawn out from there to the outside of the support.

Note that the cylindrical body 11 of the support column 10 has uneven portions 12,
13 may be reversed, and even if the unevenness is provided at any position, the fitting portion of the adjacent cylinder may be pinned, or a small diameter bolt 15 may be inserted inside as shown in Fig. 4. It is desirable to connect the upper and lower ends of the cylindrical bodies 11 by tightening them in opposite directions, or by using a combination of both methods. By adopting such a method, there is no need to worry about reducing the stability of the stairs, and by using a fixed-position electrical outlet or an electrical outlet that can be slid in the length direction on the bolt 15, it is possible to Electrical wiring can be made easier.

Furthermore, as shown in FIG.
If the cylindrical bodies of adjacent units are provided with a circular recess 26 that fits and receives them, and the cylindrical bodies of adjacent units are fitted into each other, the stability of the stairs will be further improved. It acts as a drain and prevents rainwater from entering, which also prevents internal corrosion.

(6) Effects As explained above, the spiral staircase of the present invention is formed by a combination of split cylindrical bodies that cylindrically fit the columns, and the elongated hole provided therein is connected to the electric wire lead-out hole provided in the cylindrical body of the tread unit. Since the wires passed through the inside of the pillar can be drawn out from there, it is possible to run electrical wiring from inside the pillar without having to drill holes at the site, making it easier to install stairs with lighting. It can be constructed quickly and with good appearance.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view showing an embodiment of the spiral staircase of the present invention, Fig. 2 is a perspective view of the cylindrical body of the support, and Fig. 3 is a plan view showing the fitted state of the support and the tread unit. 4 is a partially cutaway front view showing another embodiment of the support column, FIG. 5 is a partially cutaway front view showing a modified example of the tread unit, and FIG. 6 is a perspective view of a conventional spiral staircase. . DESCRIPTION OF SYMBOLS 10... Support column, 11... Cylindrical body, 12... Circular convex part, 13... Circular concave part, 14... Long hole for leading out electric wire, 15... Fastening bolt, 20... Step board unit, 21... Cylindrical body , 22...Wire lead-out hole, 23
... Pin hole, 24 ... Stopping pin, 25 ... Circular convex portion, 26 ... Circular concave portion.

Claims (1)

[Claims for Utility Model Registration] (1) In a prefabricated spiral staircase in which a plurality of tread units each having a vertical cylindrical body fixed to one end are supported by a pipe strut inserted into the cylindrical body, the said strut is circular at one end. It is formed by fitting and joining together the uneven parts of a plurality of cylindrical bodies each having a convex part, a circular concave part at the other end that fits and receives the convex part, and a long hole for leading out electric wires extending vertically in the middle. , furthermore, the elongated hole of the cylindrical body of the support column matches the height position of the cylindrical body of the step board unit,
A prefabricated spiral staircase characterized by being provided with a lead-out hole through which an electric wire passed through the pillar is drawn out to the outside through the elongated hole. (2) The prefabricated spiral staircase as set forth in claim (1) of the utility model registration, characterized in that a locking pin is inserted into the concave-convex fitting portion of the cylindrical body constituting the column. (3) The prefabricated spiral staircase according to claim 1 or 2 of the utility model registration claim, characterized in that bolts are passed through the interior of the support to tighten the upper and lower ends of the support in opposite directions. . (4) At the upper and lower ends of the cylindrical body of the above-mentioned tread plate unit, a circular convex part whose axis coincides with that of the cylindrical body and a circular concave part that fits and receives the convex part are provided, so that the cylindrical bodies of adjacent tread plate units fit into each other. Claims (1) to (1) of claims for utility model registration characterized by
A prefabricated spiral staircase described in any of paragraph (3).