| 摘要 |
PURPOSE:To efficiently manufacture a wooden bathtub having roundness at four corners by forming a curved side wall member into a semicylindrical form by butt-joining a plurality of unit members having each joint edge surface which is formed by cutting the edge surface of a basic member, at a proper angle. CONSTITUTION:A plurality of first unit members 52 having each joint edge surface which is formed by cutting the edge surface 53 of a basic member are prepared, and a prescribed number of first unit members 52 are arranged so that the contiguous edge surfaces 53 are opposed. The first unit members 52 are butt-joined at a proper angle, and a hollow cylinder 51' is formed. Curved side wall members 32 and 34 are formed by cutting said hollow cylinder 51' into two parts in the circumferential direction. Further, a plurality of second unit members 72, 72a, and 72b having the opposed edge surfaces 74 and 76 are prepared, and the side wall members 22 and 24 are formed by joint-attaching the joint edge surfaces 74 and 76 of the second unit member 72. Then, a side trunk 12 is formed by butt-joining the curved side wall members and the side wall members, and a bottom plate 14 is fixed onto the bottom part of the side trunk 12. |
