INTRA-HOLE CLEANING ROUGHENING DEVICE

PROBLEM TO BE SOLVED: To provide an intra-hole cleaning roughening device in which the intra-hole cleaning of a large-diameter hole drilled by using a core drill and the roughening of a pore wall are efficiently finished in high quality.SOLUTION: An intra-hole cleaning roughening device includes: a work cylinder 20 comprising an inner cylinder 21 and an outer cylinder 25 capable of performing synchronous rotation in a drilled hole 2 using rotational force applied from a rotary rod 12; and brush members 30 projected from the inner cylinder 21 side toward the pore wall side in a retractable manner through an opening spirally formed at predetermined intervals along the longitudinal direction in the peripheral surface of the outer cylinder 25, and constituting multiple spiral brush lines 35 following the alignment of the opening. The brush member 30 is retracted from the opening of the outer cylinder 25 to the inner cylinder 21 side when inserting the work cylinder 20 into the drilled hole 2. The work cylinder 20 is rotated by the rotational force applied from the rotary rod 12 in the cleaning and roughening work, and the tips of the brushes 35 of the brush members 30 are rotated while being brought into abutment with the pore wall of the drilled hole 2.SELECTED DRAWING: Figure 1 【課題】 コアドリルを用いて削孔された大口径孔の孔内清掃と孔壁の目荒しとを効率的かつ高品質に仕上げる。【解決手段】 回転ロッド１２から付与された回転力によりドリル孔２内で同期回転可能な内筒２１と外筒２５とからなる作業筒２０と、外筒２５の周面に螺旋状をなして長手方向に沿って所定間隔をあけて形成された開口を通って内筒２１側から孔壁側に向けて縮退自在に突出し、開口の配列に倣った複数の螺旋状のブラシ列３５を構成するブラシ部材３０とを備える。作業筒２０をドリル孔２内に挿入する際にブラシ部材３０は、外筒２５の開口から内筒２１側に縮退し、清掃と目荒らし作業時は、回転ロッド１２から付与される回転力によって作業筒２０を回転させてブラシ部材３０のブラシ３５の先端をドリル孔２の孔壁に当接させつつ、回転させる。【選択図】 図１