Stacking device and forming machine of sheet-shaped elements

A stacking device for stacking sheet-shaped elements in a stack in a forming machine, the stacking device comprising:

• a movable stacking surface, and
• an actuating device for moving the movable stacking surface:
• between a retracted position and a vertical forward position in a reciprocating back-and-forth motion for stacking sheets, and
• between the retracted position and a stowed position to open an access to the stack of sheet-shaped elements,
• wherein the actuating device comprises cam means for moving the movable stacking surface upwardly in the stowed position, in a raised position to be located above a top of the stack of sheet-shaped elements, the cam means having at least one first follower roller secured to the movable stacking surface and at least one first control profile cooperating with the at least one first follower roller to guide displacement of the movable stacking surface, and wherein the actuating device includes at least one actuator to cause the displacement of the movable stacking surface,
• the cam means includes:
• at least one second follower roller secured to the movable stacking surface below the at least one first follower roller, and
• at least one second control profile cooperating with the at least one second follower roller,
• a first portion of the at least one second control profile is curved to guide movement of the movable stacking surface between the retracted position and the vertical forward position,
• a second portion of second control profile has a straight part to guide the movement of the movable stacking surface between the retracted position and the stowed position, and
• wherein the at least one actuator comprises a double pneumatic jack configured to move the movable stacking surface between the retracted position and the vertical forward position on a first stroke and to move the movable stacking surface between the retracted position and the stowed position on a second stroke longer than the first stroke.

A stacking device for stacking sheet-shaped elements in a stack in a forming machine, the stacking device comprising:

• a movable stacking surface;
• and
• an actuating device configured to move the movable stacking surface between a stowed position for accessing the sheet-shaped elements of the stack and a vertical forward position for stacking the sheet-shaped elements of the stack,
• wherein a contact surface of the movable stacking surface is configured to rotate to space the contact surface away from the sheet-shaped elements of the stack in the stowed position and to contact edges of the sheet-shaped elements of the stack in the vertical forward position,
• wherein the actuating device is further configured to move the movable stacking surface between the vertical forward position and a retracted position between the vertical forward position and the stowed position, and
• wherein the actuating device is further configured to reciprocatingly move the movable stacking surface between the vertical forward position and the retracted position for each element of the sheet-shaped elements of the stack.