| 摘要 |
<p>A recess portion (12) and a thick outer peripheral portion (13) are formed in an upper surface of a bottom plate (1). A recess portion (21) is formed in a lower surface of a cover (2). The recess portions (12) and (21) have configurations corresponding to a combination of a tarsal portion of a foot covering an area from a heel to substantially a center portion of a foot and a metatarsal portion of the foot covering an area from the center portion to roots of toes of the foot, respectively. A plurality of blades (11) are integrally formed on a surface of the recess portion (12), extend in directions perpendicular to a longitudinal direction of the bottom plate and are slanted toward a heel portion of the bottom plate. The welded portions (3) and (4) of the upper surface of the bottom plate (1) and the lower surface of the cover, which directly surround the respective recess portions and have uniform width, are welded together by a high frequency welder and fluid is sealed in a spaced defined by the recess portions (12) and (21). Since the width of the welded portions (3) and (4) is uniform, the adhering strength becomes uniform, so that water leakage can be prevented. Further, the insole or sole of a shoe can massage the sole of foot while absorbing shock during walking, with reliable welding of the bottom plate and the cover. <IMAGE></p> |
