Reciprocating forward-feed device for the clocked linear forward-feed of stacks of goods over a transport path

A reciprocating forward-feed device for a clocked linear forward-feed of stacks of goods over a transport path (2), comprising

• a double-arm forward-feed lever (6) rotatable in a rotational plane (R) parallel to the transport path (2) and on two ends of which pushers (10) are mounted and pivotally driven via a guide rods (8) in a plane parallel to a rotational plane (R) of the forward-feed lever (6), the pushers (10) being engageable alternately with a stack of goods (4),
• a four-arbor arrangement for mounting and for a controlled, superimposed rotational, linear and pivoting drive of the forward-feed lever (6) and its guide rods (8) with
• a rotational arbor (16), driven rotationally at a constant angular velocity, horizontally and transversely to the transport path (2) and arranged outside thereof,
• a linear arbor (11) driven linearly in a reciprocating manner and coupled to the rotational arbor (16), said linear arbor (11) being inclined in a plane parallel to the rotational plane (R) at an angle (W) to an end of the transport path (2),
• a pivot arbor (7) for a pivoting drive of the guide rods (8) relative to the forward-feed lever (6), and
• a return swivel arbor (17) integrated therein for the guide rods (8) of the pushers (10), as well as
• a control of the movement of the forward-feed lever (6) and its guide rods (8) by means of the four-arbor arrangement, in such a way that
• starting from a transfer position, one (10.1) of the two pushers (10.1, 10.2), during a transport stroke with superimposition of a rotational movement (41) of the rotational arbor (16), a linear movement (42, 43) of the linear arbor (11) towards the transport path (2) and a pivoting movement of the associated guide rod (8) of the pushers (10), pushes the stack of goods (4) linearly from the transfer position along the transport path (2) into a delivery position of the stack of goods (4) at the end of the transport path (2),
• where, through activation of the return swivel arbor (17), during further pivoting of the forward-feed lever (6), this pusher (10.1) is lifted by means of a limited, reciprocating return swivelling movement (45) of the guide rod (8) backwards from the stack of goods (4) and is led behind this away from the transport path, and
• subsequently the pusher (10.1) is returned in a return stroke with superimposition of a further rotational movement (41) of the rotational arbor (16), a return linear movement (42) of the linear arbor (11) away from the transport path (2) and a further pivoting movement of the guide rod (8) on the side of the rotational arbor (16) facing away from the transport path (2) and is swivelled from behind onto the transport path (2) back into the transfer position for the next-but-one respective stack of goods, and
• the other pusher (10.2) executes the aforementioned cycle with a phase shift of 180° from the one pusher (10.1) while the next respective stack of goods is being transported.