Elongated-member-driving apparatus – With means to move or guide member into driving position – With positionable driver
Patent
1993-01-07
1995-02-21
Smith, Scott A.
Elongated-member-driving apparatus
With means to move or guide member into driving position
With positionable driver
227152, 227154, B25C 502
Patent
active
053908422
ABSTRACT:
An underpinning machine includes a worktable (11) having a central recess (17) housing one or a pair of underpinning heads (20,21; 120). The or each head has a magazine (18,19) of V-nails or wedges associated with it. In a single head version, the underpinning head (120) is power driven between two stop positions and is capable of operation by a drive plate (27) power operated (28,29) from spaced pneumatic rams disposed below the worktable. In another embodiment, two underpinning heads (20,21) are both selectively positionable within the area of the drive plate (27). The operation of the drive plate therefore automatically operates the underpinning heads whatever their position relative to fixed guides (31,32) of the apparatus which locate framing members (42) to be underpinned. By having the underpinning head indirectly actuated by the drive plate (27), a compact and flexible apparatus is provided and in the twin head version the underpinning heads can be placed very close together since there is no interference between respective drive mechanisms.
REFERENCES:
patent: 3016538 (1962-01-01), Oussani
patent: 3889865 (1975-06-01), Kuypers
patent: 4463888 (1984-08-01), Geist et al.
patent: 4572420 (1986-02-01), Pistorius
patent: 4694984 (1987-09-01), Altwicker
patent: 4830257 (1989-05-01), LIn
Magnolia Group PLC
Smith Scott A.
W. & M. Joyce Engineers Ltd.
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