EXCAVATION AND AGITATION DEVICE, AND GROUND IMPROVEMENT MACHINE COMPRISING EXCAVATION AND AGITATION DEVICE

• Main Authors: CHUMA TADASHI, OKAMOTO IKUYA, OKUMURA KEIJI
• Format: Patent
• Language: English; Japanese
• Published: 09.07.2020
• Subjects: EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES

To provide an excavation and agitation device which hardly bites a mass mixed in excavated soil between a rotating blade and a corotation preventing blade, and a ground improvement machine comprising the excavation and agitation device.SOLUTION: An excavation and agitation device 3 attached to an end portion of an auger rod of a ground improvement machine comprises: a plurality of rotating blades 32 extending along a direction perpendicular to a central axis respectively and disposed in a rotating direction with an interval; and a plurality of corotation preventing blades 35 extending along a direction perpendicular to the central axis respectively and disposed in the rotating direction with an interval at positions adjacent to the plurality of rotating blades 32 in the central axis direction. Positions of end edges at the corotation preventing blade 35 side in the central axis direction of each rotating blade 32 are the same. An interval in the central axis direction between a partial corotation preventing blades 35 of the plurality of corotation preventing blades 35 and each rotating blade 32 is larger than an interval in the central axis direction between the remaining corotation preventing blades 35 of the plurality of corotation preventing blades 35 and each rotating blade 32.SELECTED DRAWING: Figure 2 【課題】掘削土に混ざっている塊を回転翼と共回り防止翼との間に噛み込み難い掘削撹拌装置、及び該掘削撹拌装置を備えた地盤改良機を提供する。【解決手段】地盤改良機のオーガロッドの端部に取り付けられる掘削撹拌装置３であって、それぞれが中心軸と直交する方向に沿って延び且つ回転方向に間隔をあけて配置される複数の回転翼３２と、中心軸方向における複数の回転翼３２と隣り合った位置において、それぞれが中心軸と直交する方向に沿って延び且つ回転方向に間隔をあけて配置される複数の共回り防止翼３５と、を備え、各回転翼３２における中心軸方向の共回り防止翼３５側の端縁の位置は、それぞれ同じであり、複数の共回り防止翼３５のうちの一部の共回り防止翼３５と各回転翼３２との中心軸方向の間隔は、複数の共回り防止翼３５のうちの残りの共回り防止翼３５と各回転翼３２との中心軸方向の間隔より大きい、ことを特徴とする。【選択図】図２