STEEL SHELL OF DRILLING MACHINE, AND DRILLING MACHINE
To provide a steel shell of a drilling machine capable of enlarging or reducing an outer diameter at an arbitrary ratio, and the drilling machine.SOLUTION: The present invention relates to a steel shell 40 of a drilling machine. The steel shell 40 is composed of plate pieces 42 that are a plurality...
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Zusammenfassung: | To provide a steel shell of a drilling machine capable of enlarging or reducing an outer diameter at an arbitrary ratio, and the drilling machine.SOLUTION: The present invention relates to a steel shell 40 of a drilling machine. The steel shell 40 is composed of plate pieces 42 that are a plurality of cylindrical shell pieces, and a plurality of support jacks 43 that support the plate pieces 42, and is configured such that the outer diameter can be expanded or contracted at an arbitrary ratio by expanding and contracting the support jacks 43 while stacking the adjacent plate pieces 42 with respect to the center of the cross section while stacking them. It is preferable that all the plate pieces 42 are stacked while being inclined in the same direction with respect to the center of the cross section.SELECTED DRAWING: Figure 10
【課題】外径を任意の比率で拡大又は縮小することのできる掘削機の鋼殻、及び、掘削機を提供する。【解決手段】掘削機の鋼殻40である。鋼殻40は、複数の円筒殻片であるプレート片42と、プレート片42を支持する複数の支柱ジャッキ43と、から構成され、隣接するプレート片42を断面中心に対して傾けて重ね合わせつつ支柱ジャッキ43を伸縮させることによって、外径を任意の比率で拡大又は縮小できるように構成されている。すべてのプレート片42は、断面中心に対して同一方向に傾けて重ね合わされていることが好ましい。【選択図】図10 |
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