A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
To provide an enlarging excavator having a simple structure composed only of mechanical elements, having high strength, and having a higher enlarging excavation rate than a conventional enlarging excavator.SOLUTION: An enlarging excavator 100 comprises a drilling shaft 10 that can be integrally connected to a tip of a drilling rod, a plurality of support shafts 13 that are arranged on an outer periphery of the drilling shaft 10, parallel to the axis 10c of the drilling shaft 10, and arranged at equal intervals along the circumferential direction of the drilling shaft 10, and enlarging blades 11 rotatably attached to each support shaft 13. During pile hole excavation work in which the drilling rod rotates forward in the direction of arrow R, the enlarging blade 11 that receives earth pressure maintains a reduced diameter state. During the enlarging excavation work in which the enlarging rod rotates in the direction of the arrow L in the opposite direction, the enlarging blade 11 receives earth pressure and rotates around the support shaft 13 to enlarge the diameter. In this state, the drilling shaft 10 and the plurality of enlarging blades 11 rotate in the direction of the arrow L to enlarge and drill the surrounding ground.SELECTED DRAWING: Figure 2
【課題】機械的要素のみで構成された簡素な構造であり、強度が高く、従来の拡大掘削装置より拡大掘削率の高い拡大掘削装置を提供する。【解決手段】拡大掘削装置１００は、掘削ロッドの先端に一体的に連結可能な掘削シャフト１０と、掘削シャフト１０の外周に掘削シャフト１０の軸心１０ｃと平行をなし、且つ、掘削シャフト１０の周方向に沿って等間隔に配置された複数の支軸１３と、各支軸１３に回動可能に取り付けられた拡大翼１１と、を備え、掘削ロッドが矢線Ｒ方向に正回転する杭穴掘削作業時は、土圧を受けた拡大翼１１が縮径状態を保持し、掘削ロッドが矢線Ｌ方向に逆回転する拡大掘削作業時は、土圧を受けた拡大翼１１が支軸１３回りに回動して拡径状態となり、その状態のままで掘削シャフト１０とともに複数の拡大翼１１が矢線Ｌ方向に回転することにより周囲の地盤を拡大削孔する。【選択図】図２
To provide an enlarging excavator having a simple structure composed only of mechanical elements, having high strength, and having a higher enlarging excavation rate than a conventional enlarging excavator.SOLUTION: An enlarging excavator 100 comprises a drilling shaft 10 that can be integrally connected to a tip of a drilling rod, a plurality of support shafts 13 that are arranged on an outer periphery of the drilling shaft 10, parallel to the axis 10c of the drilling shaft 10, and arranged at equal intervals along the circumferential direction of the drilling shaft 10, and enlarging blades 11 rotatably attached to each support shaft 13. During pile hole excavation work in which the drilling rod rotates forward in the direction of arrow R, the enlarging blade 11 that receives earth pressure maintains a reduced diameter state. During the enlarging excavation work in which the enlarging rod rotates in the direction of the arrow L in the opposite direction, the enlarging blade 11 receives earth pressure and rotates around the support shaft 13 to enlarge the diameter. In this state, the drilling shaft 10 and the plurality of enlarging blades 11 rotate in the direction of the arrow L to enlarge and drill the surrounding ground.SELECTED DRAWING: Figure 2
【課題】機械的要素のみで構成された簡素な構造であり、強度が高く、従来の拡大掘削装置より拡大掘削率の高い拡大掘削装置を提供する。【解決手段】拡大掘削装置１００は、掘削ロッドの先端に一体的に連結可能な掘削シャフト１０と、掘削シャフト１０の外周に掘削シャフト１０の軸心１０ｃと平行をなし、且つ、掘削シャフト１０の周方向に沿って等間隔に配置された複数の支軸１３と、各支軸１３に回動可能に取り付けられた拡大翼１１と、を備え、掘削ロッドが矢線Ｒ方向に正回転する杭穴掘削作業時は、土圧を受けた拡大翼１１が縮径状態を保持し、掘削ロッドが矢線Ｌ方向に逆回転する拡大掘削作業時は、土圧を受けた拡大翼１１が支軸１３回りに回動して拡径状態となり、その状態のままで掘削シャフト１０とともに複数の拡大翼１１が矢線Ｌ方向に回転することにより周囲の地盤を拡大削孔する。【選択図】図２
ENLARGING EXCAVATOR
拡大掘削装置
NAKAO YASUMASA (author)
2023-08-22
Patent
Electronic Resource
Japanese
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