| 摘要 |
<p>PROBLEM TO BE SOLVED: To simply position a tread on the open string of stairs. SOLUTION: An attaching piece 4, a suspended down piece 5, and an open string joining tool 11 having a joint part 6 are fixed on the tread attaching face 3 of the open string 2. After the attaching piece 4, the suspended down piece 5, and a tread joining tool 7 having the joint part 6 are fixed to the lower face of the tread 1, the tread 1 is fitted from an upper side of the open string 2, and the tread 1 is positioned on the tread attaching face 3 of the open string 2.</p> |
