| 摘要 |
A water feed apparatus (20) of the present invention includes a water storage tank (40) that stores water for feeding, a pump unit (50) that feeds gas with a pressure to the water storage tank (40), and an adapter (30) that couples between the water storage tank (40) and a core drill (1). The pump unit (50) has a gripper portion (51) whose internal space is enlargingly and reducingly deformable by a gripping operation by an operator to feed the gas to the water storage tank (40). The adapter (30) has a drill-mounting portion (31b) for mounting on the core drill (1), a tank mounting portion (34) where the water storage tank (40) is mounted, a water passage (37) that connects between the drill-mounting portion (31b) and the tank mounting portion (34), and a valve unit (33) that opens and closes the water passage (37). |
