| 摘要 |
PURPOSE: To securely fix a floor board onto a frame using simple means by pushing a projection into at least one of grooved faces according to a circular pushing track when holding tongue pieces are curved upward. CONSTITUTION: A pair of holding tongue pieces 7 segregated from a support flange 4 are engaged in a groove 8 which is parallel to the edge of a bottom plate 2, and are arranged in symmetry with respect to the longitudinal direction of the flange. Projections 10 with sawtoothed inclined faces are provided on both sides of each holding tongue piece 7. The holding tongue pieces 7 located flat within the flange plane are provided on a frame 1, and after the support flange 4 is placed on the bottom plate 2 supported against a back side, the holding tongue pieces 7 are upwardly foldingly curved about a leg part 9 located at a target curved position and are made to reach a fixed position, and the sawtoothed projections 10 are pushed into a grooved surface 12 according to a circular pushing track 11. Thereby secure fixing can be achieved on the frame 1. |
