Patent ID: 8292142

Claim:
A manual breaker comprising: first and second arms connected to each other by a rotational shaft, wherein said first arm comprises: a first handle; a rotational shaft hole, said rotational shaft penetrating through the rotational shaft hole; a roller head provided at a symmetrical position to said first handle across said rotational shaft, said roller head having a roller shaft and a pair of first and second rollers, said first and second rollers being rotatably held along said roller shaft, a second handle; a rotational shaft hole, said rotational shaft penetrating through the rotational shaft hole; and an impactor facing said first and second rollers of said roller head, said impactor being provided at a symmetrical position to said second handle across said rotational shaft, said impactor pinching a sheet glass by actuation of said first handle and said second handle, and wherein said impactor comprises: a mount; a third roller facing said first and second rollers, and slidably held on said mount so as to change a distance to said first roller and a distance to said second roller; a trigger member moving between a standby position and a release position according to vertical movement of said third roller; an impact shaft held at a predetermined position in advance when said trigger member is at the standby position, and moves from said predetermined position to said sheet glass and impacts said sheet glass such that said first and second rollers push said sheet glass by movement of said trigger member to the release; and a tension coil spring urging said impact shaft toward said sheet glass.