IE35843L - Securing metal mountings on wooden members - Google Patents

Abstract

1356477 Riveting NILSSONS INDUSTRIEMBALLAGE AB 24 Nov 1971 [25 Nov 1970] 54526/71 Heading B3U Metal mountings 12 having pre-bored rivet holes are riveted to wooden members 8 by feeding the members sequentially on a conveyer 6 to a drilling and rivet inserting station 14, placing the mountings over rivets inserted in members at the station 14, and upsetting the rivets at a riveting station 40. In operation the boards are fed from a stack 10 by the conveyer 6 so that arrival of a board at the station 14 stops the movement of the conveyer. The board is then clamped by a clamp 34 so that rivet holes can be drilled using drills 18. On completion of the drilling rivets 24, in a horizontal guide (not shown) in box 26, are pushed horizontally by pneumatically operated pushers until a rivet passes down each of tubes 28. A cylinder 30 is then actuated so that, via piston rod 32, punches are moved downwardly within the tubes 28 to press the rivets into the board. The conveyer is restarted whereupon the board is turned through 180 degrees so that a mounting 12 can be placed over the rivets at either end of the board. The board then passes to the riveting station where movable plate electrodes 44 are pressed downwards against the ends of the rivets 24, while the rivet heads are supported by plate electrodes 42. The riveting in position of the mountings 12 is thus achieved. In other embodiments the plate electrodes 42, 44 may be replaced either by individual electrodes mounted on a carriage movable in the direction of movement of the conveyer (Fig. 3) or by disc shaped electrodes (Fig. 4). A powder may be sprayed onto the rivet heads to form a protective layer, the powder being melted by the heat of the rivets obtained during the riveting operation. [GB1356477A]