Arched-rail Frame
1958 - 1963

Reru Achi Waku
[Arched-rail Frame]
21.2 x 30.2 cm Ink Painting

Text at the Top Left
Arched-rail frames were already used around the late Meiji era (1868-1912) or the beginning of the Taisho era (1912-1926). They became common in the beginning of the Showa era (1926-1989). 60-lb/yd rails with inwardly curved heads were mainly used for this purpose, but the heads of arched rails used at Mitsui Yamano Coal Pit in Urushio were instead curved outward.

Text at the Bottom
When this kind of frame was used at winding machine stations (makiba), 100-lb/yd rails were used. A straight rail was inserted between the heads of two arched rails and joined to each at two points. Lagging was inserted between these support units and the roofs or walls, and the units were fastened together with long bolts and nuts.

Cross Section of the Rail
tobu: head


Translation Assisted by Mr. Nathan Johndro

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