Concealed fixing fastener for hyperboloid spiral stairs

• Main Authors: LU ZHEN, XU BO, ZHU SHUIFANG, TAN CHANGJIU, CHEN HUIQING, JIN JUN, ZANG DONGWEI, YU MINGHUI, LI JINDA, LI ZHONGQUAN, PAN CHENYANG, ZHANG PENG, TANG HAISHAN, ZHOU ZHI, ZHANG WENJIE, HUA XUAN, WANG YAZHOU, CHEN ZHUQING, LIAO SIYI, WU WEI, DONG JING
• Format: Patent
• Language: Chinese; English
• Published: 22.10.2019
• Subjects: BUILDING; CEILINGS; FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS; FIXED CONSTRUCTIONS; FLOORS; GENERAL BUILDING CONSTRUCTIONS; INSULATION OR OTHER PROTECTION OF BUILDINGS; ROOFS; WALLS, e.g. PARTITIONS

The invention provides a concealed fixing fastener for hyperboloid spiral stairs. The concealed fixing fastener for the hyperboloid spiral stairs comprises a fastener body which is mounted to a stainless steel mounting part in a fitting manner, wherein the fastener body comprises a first folding edge, a second folding edge, a third folding edge and a fourth folding edge which are sequentially fixedly connected; the first folding edge is vertical to the second folding edge, and the second folding edge is vertical to the third folding edge; the third folding edge is vertical to the fourth folding edge, and the fourth folding edge is vertical to the first folding edge; the first folding edge, the third folding edge and the fourth folding edge are positioned at the same side of the second folding edge; and a reserved mounting port is formed between the first folding edge and the fourth folding edge. With the adoption of the concealed fixing fastener for the hyperboloid spiral stairs, the problem of splicing and i