| 摘要 |
A drill machine having a novel structure is provided to be easily extended in a longitudinal direction and to prevent scattering of chips and dusts to surroundings when drilling a hole on an object. According to the present invention, the drill machine is provided with an adapter (A) coupled to a chuck (3), allowing a convenient use when drilling a hole (6) on a high ceiling (5). According to the present invention, the drill machine comprises: a rotary shaft (10) extended in a longitudinal direction, and provided with an auxiliary chuck (11) detachably connecting to a drill bit (4) on a front end, and connecting to the chuck (3) on a rear end; a first tubular body (20) provided on an outer side of the rotary shaft (10); a second tubular body (30) provided on the outer side of the rotary shaft (10), and with a rear end slidably connected to a front end of the first tubular body (20) in a longitudinal direction; a collecting unit (40) extended to a front direction to surround a circumferential portion of the auxiliary chuck (11) on the front end of the second tubular body (30); and an elastic member (50) provided between the first and second tubular bodies (20, 30) to elastically press to move the second tubular body (30) and the collecting unit (40) forward. The present invention has an advantage in preventing scattering of the chips and the dusts, by collecting them inside the collecting unit (40) and the first and second tubular bodies (20, 30) when drilling the hole (6) using a drill bit (4). |
