| 摘要 |
<p>The present invention relates to a core drill for boring a glass having a moving seamer. The core drill (100) comprises: a core (10) which includes a coupling protrusion (11), a screw coupling part (12), a hollow pipe part (13), a hollow glass boring part (14), and one or more long groove parts (15); a seamer (20) which has an inner diameter guided to the core (10) and includes a chamfering part (21), an end protrusion part (22), and coupling holes (23); coupling members (30) which are coupled to the coupling holes (23), respectively; and a compression spring (40) which is installed in the pipe part (13) of the core (10) and applies elasticity to the seamer (20). Thereby, the present invention maximally prevents damage to a glass caused by a glass boring work by minimizing vibration applied to the seamer.</p> |
