Title:
廻り階段及び廻り階段の施工方法
Document Type and Number:
Japanese Patent JP7393888
Kind Code:
B2
Abstract:
To enable construction of a step board irrespective of the difference in the structure of a core housing of a step board of a spiral stair, the size of the thickness of a core column, and the difference in the step board housing method with respect to a side plate on the outside of the spiral stair.SOLUTION: A receiving device A for a spiral stair is provided which includes a plurality of step board receivers 31-33 for supporting inner end parts of step boards 11-13 of a spiral stair S. On a lower surface of each of the step boards 11-13, a recessed groove 19 is formed as a step board side positioning part, and each of the step board receivers 31-33 includes a mounting part 35 mounted and fixed on a core column 1, and a receiving part 46 for receiving the step boards 11-13. At the receiving part 46, a protrusion strip 54 engaged with the recessed groove 19 of each of the step boards 11-13 and for positioning the step boards 11-13 at each of the step board receivers 31-33, and a placement part 48 on which an inner end part of each of the step boards 11-13 positioned by the protrusion strip 54 is placed and fixed are provided. A position of the recessed groove 19 of each of the step boards 11-13 and an arrangement position in a circumferential direction of the core column 1 of the protrusion strip 54 of each of the step board receivers 31-33 are set according to a core housing structure and thickness of the core column 1.SELECTED DRAWING: Figure 10
Inventors:
Shoji Kosone
Application Number:
JP2019138732A
Publication Date:
December 07, 2023
Filing Date:
July 29, 2019
Export Citation:
Assignee:
Daiken Industry Co., Ltd.
International Classes:
E04F11/022
Domestic Patent References:
| JP11131738A | ||||
| JP2040837U | ||||
| JP2005315031A | ||||
| JP2003138715A | ||||
| JP2002206320A | ||||
| JP2004116088A |
Foreign References:
| US4655017 |
Attorney, Agent or Firm:
Patent Attorney Corporation Maeda Patent Office