| 摘要 |
PROBLEM TO BE SOLVED: To securely fix a stair riser using an adhesive in a state of being engaged with a riser fitting groove formed on a rear face of a step board.SOLUTION: An adhesive 6 is applied to a riser 2 along a recessed groove 4 which is formed on an upper butt end 21 of the riser 2 at the butt end side. After engaging the upper end part of the riser with a riser fitting groove 5, the upper butt end of the riser is brought into close contact abutting on the groove bottom 51 of the riser fitting groove. With this, the adhesive applied to the recessed groove at the butt end side is expanded to the upper butt end exceeding the recessed groove at the butt end side. At least the recessed groove at the butt end side and the upper butt end exceeding the recessed groove at the butt end side of the riser are bonded and fixed to the groove bottom of the riser fitting groove with the adhesive. The adhesive is further extended to the front face and the rear face of the riser butt end part to bond and fix an upper end part surface 22 of the riser to a front inner wall surface 52 of the riser fitting groove. By bonding and fixing the rear face 23 of the upper end part of the riser to a rear inner wall surface 53 of the fitting groove in the riser, a stronger fixing structure is obtained.SELECTED DRAWING: Figure 2 |
