Abstract: A manual breaker for cutting sheet glass. The manual breaker includes a rotational shaft (6) that rotatably holds first and second arms (2) and (4). A sheet glass having a scribe line formed thereon in advance is pinched among rollers (24) and (45). When handles (20) and (40) are actuated to narrow a distance between rollers (24) and (45), the roller (45) moves in a Y-axis direction and an impact shaft (51) impacts the sheet glass, accordingly. The sheet glass can be thereby easily cut into pieces along the scribe line and a sectional quality having a smooth cut surface can be ensured for the sheet glass.

Abstract: A rotational shaft 6 rotatably holds first and second arms 2 and 4. A sheet glass having a scribe line formed thereon in advance is pinched among rollers 24 and 45. When handles 20 and 40 are actuated to narrow a distance between rollers 24 and 45, the roller 45 moves in a Y-axis direction and an impact shaft 51 impacts the sheet glass, accordingly. The sheet glass can be thereby easily cut into pieces along the scribe line and a sectional quality having a smooth cut surface can be ensured for the sheet glass.

Abstract: Provided is a manual cutter comprising a holder fitting unit (30) having a holding hole portion (35). A tip holder (10) for the column-shaped manual cutter includes a tip (14) rotatably fitted at its one end, and a positioning attachment part (16) formed by notching the other end. The holder attachment part (30) is caused to fix the tip holder (10) in the holding hole portion (35) by abutting and pushing a fixing screw (38) onto the positioning attachment part (16). As a result, the complicatedness of the tip fitting and replacing works can be eliminated to make the tip proper without any error.