Static structures (e.g. – buildings) – Stepped; e.g. – stair – Helical type
Patent
1997-07-15
1999-03-16
Friedman, Carl D.
Static structures (e.g., buildings)
Stepped; e.g., stair
Helical type
52182, 526551, 52646, 527202, 527362, 403403, 403165, 403170, 403217, 403230, 256 65, E04F 11032
Patent
active
058815090
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a spiral staircase in a building and to a connecting metal for a spiral staircase used for assembling the spiral staircase, and especially to a spiral staircase which can be assembled and installed simply and with certainty without skilled labor and processing and which is suitable for wooden buildings, mainly houses, and to a connecting metal for the spiral staircase.
DESCRIPTION OF THE BACKGROUND ART
A staircase in a wooden building is normally assembled and installed using a conventionally traditional method of construction.
Various methods of construction are used in the installation of a staircase in a wooden building. Among them, the most complicated method for construction relates to the assembly of a spiral staircase, which can only be implemented with the aid of the techniques of a carpenter.
Specifically, a spiral staircase installed in a wooden building includes a complicated framework, and a number of wooden members, joints, and the like, which require assembly. Specific methods for processing and working are required for such a complicated assembly of a spiral staircase, resulting in the problems of inefficiency in operation, a prolonged construction period, high costs, and the like, because the techniques of a professional carpenter are needed for such operations.
This invention has been proposed to solve the problems of the prior art and has an object of providing a spiral staircase and a connecting metal for the spiral staircase. The staircase can be connected and assembled simply, with certainty, and firmly without special carpenters techniques by using metals for connecting a shaft pole with the arm which is a tread of the spiral staircase, connection of the arm with a baluster, and connection of the baluster with a handrail, whereby low costs and high efficiency in operation can be achieved.
DISCLOSURE OF THE INVENTION
This invention relates to a spiral staircase comprising: a shaft pole; a plurality of arms connecting spirally with the outer periphery of the shaft pole; treads secured to the upper surface of each arm; a plurality of balusters secured to each outer end of the arms in parallel with the shaft pole; and a plurality of handrails erected between and connected to the balusters; wherein each arm is connected to the shaft pole using an arm connecting metal; each baluster is connected with each arm using a baluster connecting metal; and each baluster is connected with each handrail using a handrail connecting metal.
The spiral staircase with this structure has the advantage that it can be simply assembled without any professional techniques and specific methods of processing and operation because, in the spiral staircase, the connection of the arm with the shaft pole, connection of the baluster with the arm, and the securing and connection of the handrail to balusters are implemented using metals.
This can solve the conventional problems of operational inefficiency, prolonged construction period, high costs, and the like.
Also, the present invention relates to a metal for connecting a shaft pole with a plurality of arms and with a plurality of balusters in a spiral staircase, comprising: a U-shaped metal formed of upper, back, and lower portions; and a pair of long bolts with one end of each being secured to the upper and lower portions respectively of the U-shaped metal and the other end being threaded and projecting from the back of the U-shaped metal; wherein a pair of through-holes is provided for inserting an anchor bolt at the upper and lower portions of the U-shaped metal; the U-shaped metals are located on both ends of the arm; both ends of the arm are inserted into the U-shaped metal and secured using the anchor bolt; and the long bolts penetrate the shaft pole and the baluster and are secured to connect the plurality of arms and the plurality of baluster to the shaft pole.
Further, the present invention relates to a metal for connecting a shaft pole with a plurality of arms and with a plurality of balusters in a sp
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Callo Laura A.
Friedman Carl D.
Inafuku Construction Co., Ltd.
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