GB1438264A - - Google Patents

Abstract

1438264 Nailing machines MAX KK 8 Aug 1974 35092/74 Heading B4C A pneumatically operated nailing machine comprises a nail driving member 6 fastened to a reciprocable piston 5 which is pneumatically operated in both directions and a nail feeding piston 34 which moves transversely to the movement of piston 5 to feed nails into the path of the nail driving member 6. the nail feeding piston having a pawl 35 which cuts supporting wire 43. Nail driving piston.-Pressure air from chamber 3 is supplied to reservoir 15 and acts on a head valve 7 to move it downwardly to engage the top of a cylinder 4 (Fig. 3) and at this stage the space above the piston 5 is connected to atmosphere through a passage 5. When a trigger 16 is pressed the chamber 18 allows the space 8, through passage 14 and reservoir 15 to communicate with the atmosphere and the pressure in chamber 3 allows valve 7 to rise and pressure to be applied to drive the piston 5 downwards. When the trigger 16 is released the reverse procedure takes place and the piston is raised by pressure built up in chamber 13 which is applied below the piston. Nail feeding mechanism.-Nails 42 on wires 43 are fed from a magazine by means of a piston 34 having a nail engaging pawl 38 to feed the nails and also provide a cutter to cut the supporting wire 43 as the nail 1 is driven. A locking pawl 48 is also provided. The space 50 behind the piston 34 is connected to a quick release valve 53 which dumps air from the space to allow return movement of the piston. Magazine.-A magazine for the nailing machine comprises a bottom plate 68 which can be locked by ledges 71-73 to allow for different lengths of nails. The nails are spirally wound in the magazine and held in place by a lid 81 attached by a bayonet fitting 77, 88.