| 摘要 |
PROBLEM TO BE SOLVED: To improve the strength of a seat base, to reduce weight and to improve the safety of the seat base. SOLUTION: The seat base 13 and a supporting leg to be fitted to the seat base 13 and adhered are respectively molded by synthetic resin. On the back surface of the seat base 13 center projection parts 21 and 22A at both parts Al and A2 where loads are applied and outer side projection parts 21B-21F and 22B-22F provided for plural with prescribed intervals so as to be almost along on circumferences whose centers are the center projection parts 21A and 22A are respectively formed. On the back surface of the seat base 13, a closed rib 23 and radial ribs 24A-24C and 25A-25C are respectively formed near the projection parts 21A-21F and 22A-22F. When this chair 12 for a bath is assembled, at the time of the deformation of the seat base 13 by the load, the lower end faces of the projection parts 21A-21F and 22A-22F are abutted to the flat part of the supporting leg, stress applied to a seat surface 15 is dispersed and damage is prevented. |
