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

1. 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 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.

2. Forward-feed device according to claim 1 , wherein the linear arbor ( 11 ) is formed by a linear guide ( 12 ) arranged stationarily relative to the transport path ( 2 ) with a linear carriage ( 13 ) mounted displaceably thereon.

3. Forward-feed device according to claim 2 , wherein the rotational arbor ( 16 ) is formed by a rotational drive ( 15 ) seated on the linear carriage ( 13 ).

4. Forward-feed device according to claim 1 , wherein the linear arbor ( 11 ) is formed by a linear motor.

5. Forward-feed device according to claim 1 , wherein the rotational arbor ( 16 ) is arranged displaceably on the linear arbor ( 11 ).

6. Forward-feed device according to claim 1 , wherein a pivoting drive of the pivot arbors ( 7 ) of the guide rods ( 8 ) is derived from the rotational arbor ( 16 ).

7. Forward-feed device according to claim 6 , wherein the pivot arbors ( 7 ) of the guide rods ( 8 ) are coupled via a revolving chain or synchronous belt drive ( 21 ) to a coaxial central pinion ( 20 ) which is stationary relative to the rotational arbor ( 16 ) during the transport and return stroke.

8. Forward-feed device according to claim 7 , wherein the central pinion ( 20 ) is mounted in a swivelling manner and can be driven in a reciprocating manner for generating the return swivelling movement of the guide rods ( 8 ).

9. Forward-feed device according to claim 8 , wherein the central pinion ( 20 ) can be activated in a reciprocating manner by the rotating forward-feed lever ( 6 ) or by the linear arbor ( 11 ) via a cam control ( 28 , 29 , 30 , 31 ).

10. Forward-feed device according to claim 8 , wherein the central pinion ( 20 ) can be activated in a reciprocating manner by a separate servomotor ( 39 ).

11. Forward-feed device according to claim 8 , wherein the central pinion ( 20 ) can be activated by a pneumatic drive.