| 摘要 |
PROBLEM TO BE SOLVED: To provide a footstep frame for a passenger conveyor capable of preventing failure of flowing of a molten material in the vicinity of a nut attachment hole of the footstep frame.SOLUTION: A footstep frame 60 made of an aluminum die casting is configured so that, a step part 90 formed of a horizontal plate 92 and a vertical plate 94 is formed on a corner part in the longitudinal direction where a cleat surface 64 and a riser surface 66 intersect, and a nut attachment hole 96 penetrates the horizontal plate 92. A planar shape of the nut attachment hole 96 becomes narrower as it progresses to the rear side, and thickness of the horizontal plate 92 where the nut attachment hole 96 is opened, becomes thinner as it progresses to the front side.SELECTED DRAWING: Figure 6 |
