US 4,127,226 A · Combined kerfing and joint nailing machine

Abstract

A woodworking machine for fastening together wood picture frames, cabinet doors, case goods, and the like, with joint nails driven into sawed kerfs. The machine combines the two operations of sawing the kerfs and inserting the joint nails. Workpieces to be joined are clamped to movable fixtures. Actuators move the workpiece fixtures apart to permit the entry of a rotary kerfing saw to cut kerfs in the facing surfaces to be joined. Other actuators move the kerfing saw into position and into the workpieces to cut the kerf, then withdraw the saw and move it back into a retracted position out of the way. The workpiece fixtures are then moved to bring the workpieces together so that the sawed kerfs become a single kerf ready to receive a joint nail. The workpiece fixtures may also move the workpieces forward, up to the nailing head. The nailing head then pushes a joint nail into the kerf, fastening the workpieces together. Since both operations are performed on the same workpieces, the kerfs may be located precisely with relation to the outer surfaces, providing improved alignment in the product in addition to a saving in labor.

Claims12

Dependent claims

A combined kerfing and joint nailing machine comprising:

an elongated frame element encompassing a nailing axis and supporting generally therealong:
workpiece tables with holding fixtures thereon to hold workpieces;
kerfing saw positioning means carrying a kerfing saw;
and
a nailing head;
and further comprising:
fixture actuator means to move said fixtures between a separated position and a joined position;
saw actuator means to move said saw on said positioning means between an erect position adjacent said axis and a retracted position clear of said axis, and to feed said saw into said workpieces in said erect position to cut kerfs therein;
nailing head actuator means to cause said nailing head to drive joint nails;
and further comprising:
control means connected to said actuator means and adapted to effect the following sequence of operations:
(a) move said fixtures to said separated position;
(b) move said saw from said retracted position to said erect position;
(c) feed said saw into said workpieces to cut a kerf therein;
(d) withdraw said saw from said kerf;
(e) move said saw to said retracted position;
(f) move said fixtures to said joined position to hold said workpieces in contact;
and
(g) drive a joint nail into said kerf.

16 more elements

Dependencies are inferred from the claim text.

Combined kerfing and joint nailing machine

Life of this patent

Combined kerfing and joint nailing machine

Life of this patent

Abstract

Claims12