FIXING STRUCTURE OF RISER BOARD, CONSTRUCTION METHOD OF RISER BOARD, AND RISER BOARD FIXING MEMBER USED FOR THEM AND RISER BOARD

To provide a novel technique that makes it easier to fix a riser board of stairs to a tread board of an upper stage and also prevents the treading noise.SOLUTION: A riser board fixing member 10 has a main body portion 11 having a rectangular cross section, a front protruding portion 12, a tapered upward protruding portion 13, and a fixture insertion hole 16. After fitting the front protruding portion into a concave groove 24 formed on a rear surface 23 of a riser board 20, to temporarily fix, fix or integrating the same, and applying an adhesive 40 to a riser board upper end surface 21, the upper end of the riser board is inserted into a riser board fitting groove 33 formed on a back surface 32 of a tread board 30, and the riser board upper end surface is pressed against a groove bottom surface 33a of the riser board fitting groove to be adhered. Here, the upward protruding portion of the riser board fixing member is inserted to the root between the rear surface of the upper end of the riser board and a rear groove side surface 33c of the riser board fitting groove. Further, a fixture 50 is made to pass through the fixture insertion hole to fix the riser board upper end portion to the front end portion of the tread board to obtain the fixing structure of Fig. 2.SELECTED DRAWING: Figure 2 【課題】階段の蹴込板を上段の踏板に固定する際の作業をより簡単に行うことができ、踏み鳴りも防止することができる新規な技術を提供する。【解決手段】蹴込板固定部材１０は、断面方形状の本体部１１と、前方突出部１２と、先細テーパー状の上方突出部１３と、固定具挿通穴１６とを有する。前方突出部を蹴込板２０の後面２３に形成された凹溝２４に嵌合して仮固定または固定または一体化し、蹴込板上端面２１に接着剤４０を塗布した後、蹴込板の上端部を踏板３０の裏面３２に形成された蹴込板嵌合溝３３に挿入して、蹴込板上端面を蹴込板嵌合溝の溝底面３３ａに押し付けて接着する。このときに蹴込板固定部材の上方突出部は、蹴込板上端部後面と蹴込板嵌合溝の後方溝側面３３ｃとの間に根元まで挿入される。さらに、固定具挿通穴に固定具５０を通して蹴込板上端部を踏板前端部に固定して、図２の固定構造を得る。【選択図】図２