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OwnerDario Toncelliinventor
Estimating the term…
Working unit (1) for realizing holes (H) in a slab material (L) and for machining the inner side of the holes (H) thus formed, comprising a work table (2), at least one tool (4, 6) mounted on a motorized spindle, fixed means (8) for supporting the slab (L) and at least one support device (10) comprising a hollow element (11) intended to engage with a slab portion (P). The support device (10) comprises a top portion (12) movable at least between a raised position in which the slab portion (P) is coplanar with the slab (L) and a lowered position in which the slab portion (P) is lowered with respect to the slab (L) and therefore the hole (H) is free of the slab portion (P). The support device (10) comprises means (14) for locking the movable top portion (12) at least in the lowered position.
Working unit (1) for realizing holes (H) in a slab material (L) and for machining the inner side (B) of the holes (H), thus formed, comprising:
Working unit (1) according to any one of the preceding claims, characterized in that said movable top portion (12) is intended to pass from said lowered position into a bottom position as a result of a downwards vertical pushing force exerted by said tool (6) on the slab portion (P).
Working unit (1) according to any one of the preceding claims, characterized in that it comprises at least one vertical-axis spring (18) having one end connected to said movable top portion (12) and designed to keep, in the extended configuration, the movable top portion (12) in the raised position.
Working unit (1) according to any one of the preceding claims, characterized in that said locking means (14) comprise a fixed pin (26) with a mushroom-shaped head (27) and at least one pair of lateral engaging elements (40) mounted on said movable top portion (12).
Working unit (1) according to the preceding claim, characterized in that said locking means (14) comprise, for each oil-hydraulic cylinder (52), a valve (62) positioned in said duct (57) and designed to switch from an operating configuration, where it prevents the incompressible fluid from passing from said bottom chamber (56) to said top chamber (55) when the top plate (50) is in the raised position or lowered position, into a non-operating configuration, where it allows the incompressible fluid to pass from said bottom chamber (56) to said top chamber (55) when the top plate (50) is in the bottom position.
Working unit (1) according to preceding claim, characterized in that each valve (62) comprises a respective control lever (64) for selectively switching said valve (62) from the operating configuration into the non-operating configuration and vice versa.
Working unit (1) according to the preceding claim, characterized in that it comprises, for each oil-hydraulic cylinder (52), a top stop (65) and a bottom stop (66) designed to interact with said control lever (64), each valve (62) being designed to pass into the operating configuration when said control lever (64) comes into contact with the top stop (65), namely when said top plate (50) is in the raised position and said valve being designed to pass into the non-operating configuration when said control lever (64) comes into contact with the bottom stop (66), namely when said top plate (50) is in the bottom position.
Working unit (1) according to the preceding claim, characterized in that said recall means (16) comprise the springs (18) wound around said telescopic stems (58), said springs (18) being designed to bring the top plate (50) back into the raised position when the valves (62) are in the non-operating configuration.
Dependencies are inferred from the claim text.