초록

Gripper for plastic film grasping, particularly suitable for automatic wrapping machines equipped with turntables is, provided with plates sliding into mobile guides, whose convergence is allowed during closing phase by a device fitting between the guides.

대표청구항 ▼

A gripper for an automatic plastic film wrapping machine, said machine comprising: a support; a horizontal shaft mounted on said support and oscillating about the longitudinal shaft axis; a support rod spaced radially from and rotatably fixed with said shaft to vertically move as result of said shaf

A gripper for an automatic plastic film wrapping machine, said machine comprising: a support; a horizontal shaft mounted on said support and oscillating about the longitudinal shaft axis; a support rod spaced radially from and rotatably fixed with said shaft to vertically move as result of said shaft oscillation, said rod having a rod axis extending parallel to said shaft axis; a pair of spaced apart guide plates mounted swingably about respective parallel oscillatory axes extending horizontally perpendicular to said shaft axis on said support and formed with respective tops and bottoms; a pair of gripping jaws mounted slidably on said guides and formed with respective upper and lower ends, said upper ends projecting over tops of said guides and gripping a film therebetween in a gripping position of the jaws and releasing the film in an open position of said jaws and said lower ends slidably engaging said rod so that said gripper jaws vertically move with said rod; and an upwardly narrowing wedge fixed rotationally with said shaft to swing along an arcuate path and engageable between said guide plates to converge said tops in a position thereof corresponding to said gripping position of the jaws, said plates being parallel to one another in another position thereof corresponding to said open position of said jaws upon removal of said wedge from between the guide plates along said path.