| 摘要 |
A core (7), a flexible pad (6) covering the core and a synthetic resinous skin (5) covering the pad are layered each other. A thread (4) is arranged on a surface side (5a) of the skin and has portions (4a) inserted in grooves of the pad through through-holes (14) of the skin. Stoppers (10, 20, 25, 30, 4c1, 4c2) engage a rear side (5b) of the skin for stopping the portions of the thread from coming off from the skin. A sewing line is formed along the though-holes (14). |
