LAYER PRESS FOR COMPRESSING STACKS OF SHEET-LIKE ARTICLES

Abstract

A layer press (10) for compressing sheet-like articles (12) arranged in a stack (14). The press has an accommodating chamber (18) for accommodating the sheet-like articles (12) and also a pressing arrangement (34) with a contact pressure lever (42) which can be pivoted about a rotary spindle (44) and on which is arranged a contact pressure body (31) with a contact pressure element (32). In a standby position (BS), the contact pressure lever (42) is pivoted into the accommodating chamber so that the contact pressure element (32) engages the uppermost article in the stack, and for pressing purposes, the spacing between a base (20) of the accommodating chamber (18) and the contact pressure element (32) located in the standby position (BS) is reduced. Since the rotary spindle (44) is arranged at or beneath the height of the standby position (BS), the contact pressure element (32) is moved in the direction of the outer periphery of the accommodating chamber (18) during pressing, so that it sweeps over the uppermost sheet-like article (16) with a smoothing action in the process.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is explained in detail hereinbelow with reference to an exemplary embodiment illustrated in the drawing, in which, purely schematically:

FIG. 1 shows a plan view of a stacking apparatus having two layer presses which are arranged on opposite sides of the accommodating chamber and each have a pressing arrangement, a contact pressure element assigned to the pressing apparatus in each case being illustrated in the rest position by way of a solid line and in a standby position by means of a chain-dotted line;

FIG. 2 shows a partially sectioned side view of the layer press of the stacking apparatus shown in FIG. 1, the rest position of the contact pressure element, once again, being illustrated by means of a continuous line and the standby position being illustrated by means of a chain-dotted line;

FIG. 3 shows a side view of the pressing arrangement of the layer press shown in FIG. 2, with the contact pressure element arranged on a contact pressure lever and with a drive in the form of a piston/cylinder subassembly;

FIG. 4 shows a perspective view of the pressing arrangement shown in FIG. 3, the contact pressure element being located in the rest position and a guide bar being illustrated in a state in which it has been pulled out of a guide aperture in a bearing body; and

FIGS. 5 a-5d show side views of parts of the bearing press shown in FIG. 1 with pressing arrangements illustrated in FIGS. 3 and 4 and with a stack of folded printed products in the accommodating chamber during a pressing operation, the contact pressure elements being shown in the rest position (FIG. 5a), in the standby position (FIG. 5b), in a pressing position (FIG. 5c) and in a subsequently resumed rest position (FIG. 5d).

Claims

1. A layer press for compressing sheet-like articles located essentially horizontally one above the other in a stack, comprising an accommodating chamber (18) for accommodating a stack of the sheet-like articles, the accommodating chamber being bounded at the bottom by a base (20) on which the sheet-like articles are located,at least one pressing arrangement (34) which includes a contact pressure element (32) which can be pivoted about a rotary spindle (44) arranged outside the accommodating chamber (18), and a drive (56) configured to move the contact pressure element (32) from a rest position (RS) outside the accommodating chamber (18) into a standby position (BS) within the accommodating chamber (18),wherein the contact pressure element (32) can be moved into a pressing position (PS) by a reduction in the spacing between the base (20) and the rotary spindle (44) with the contact pressure element (32) resting on the uppermost sheet-like article (16), andwherein the contact pressure element (32) is arranged on a contact pressure lever (42), and the contact pressure lever (42) can be moved with pivoting action about the rotary spindle (44), which is arranged between the height of the base (20) and the height of the standby position (BS), such that, during movement from the standby position (PS), the contact pressure element (32) is subjected to a movement component in the direction of a periphery of the accommodating chamber (18) and, in the process, sweeps over the uppermost sheet-like article with a smoothing action.

2. The layer press as claimed in claim 1, wherein a forward movement of the contact pressure element (32) from the rest position (RS) into the standby position (BS) and a return movement of the contact pressure element (32) from the pressing position (PS) into the rest position (RS) are brought about by the rotary spindle (44) being moved forwards and back, along a displacement direction (V) between a rest position (R) in which it is remote from the accommodating chamber, and a standby position (B), in which it is in the vicinity of the accommodating chamber.

3. The layer press as claimed in claim 2, wherein the contact pressure lever (42) is mounted on the rotary spindle (44), which is oriented essentially at right angles to the displacement direction (V), and, together with the contact pressure element (32), which is arranged on its first contact pressure lever arm (60), swings down in the direction of the standby position (BS) with the assistance of inertia, as soon as the rotary spindle (44), in the course of its forward displacement, comes to a standstill in its standby position (B).

4. The layer press as claimed in claim 3, wherein the rotary spindle (44) is mounted in a bearing body (70), in relation to which the contact pressure lever (42) can be pivoted with frictional braking, and wherein the bearing body (70) is guided in the manner of a carriage along the displacement direction (V).

5. The layer press as claimed in claim 4, wherein the bearing body (70) has arranged on it a connecting rod (51) which is oriented parallel to the rotary spindle (44), the rotary spindle (44) is engaged around by a fork (50) formed on a first lever arm (48) of a pivoting lever (46), the connecting rod (51) displaces the bearing body (70) with the rotary spindle (44) forward and back by means of the drive (56).

6. The layer press as claimed in claim 5, wherein, on the contact pressure element side, the pressure lever arm (60) is curved in a hook-like manner and, opposite this, it has a second contact pressure lever arm (92) in the form of a follower cam (94), in which case the follower cam (94), during the return displacement of the rotary spindle (44), is positively guided with sliding action by a guide means acting as a swing-back safeguard (96) and causes the contact pressure element (32) to be guided back into its rest position (RS) when the rotary spindle (44) reaches its rest position (R) following the return displacement.

7. The layer press as claimed in claim 6, wherein the pressing arrangement (34) has a rear stop (98) which interacts with the contact pressure lever (42) such that the contact pressure element (32) is prevented from swinging back beyond the rest position (RS).

8. The layer press as claimed in claim 7, wherein the contact pressure element (32) is designed as a contact pressure edge in a free end region of a planar, essentially rectangular contact pressure body (31), and wherein, in the pressing position (PS) of the contact pressure element (32), the contact pressure body (31) runs at least generally parallel to the base (20).

9. The layer press as claimed in claim 1 wherein two of said pressing arrangements are arranged on respective opposite sides of the accommodating chamber, with the accommodating chamber and the pressing arrangements being mounted on a framework which is mounted for rotation about a vertical axis, whereby a stack formed in the accommodating chamber may be pressed before it is transported away and/or during rotation of the framework about the vertical axis.

10. A layer press for compressing stacks of sheet-like articles, comprising an accommodating chamber for accommodating a stack of the sheet-like articles which is supported on a base thereof,a pressing arrangement comprising a contact pressure lever having a contact pressure element mounted thereto,means mounting the pressing arrangement adjacent one side of the accommodating chamber a) for movement from a rest position wherein the contact pressure element is located outside the accommodating chamber and oriented generally horizontally and parallel to the printed products in the stack, to a standby position, and wherein the contact pressure element initially moves in a generally horizontal displacement direction into the accommodating chamber above the base and then swings down for abutment against the uppermost sheet-like article in the accommodating chamber,b) for movement from the standby position to a pressing position wherein the contact pressure element is initially pivoted back to its generally horizontal orientation and then sweeps over and smoothes the uppermost printed product, andc) for movement from the pressing position back to the rest position.

11. The layer press as claimed in claim 10 wherein the layer press comprises a second pressing arrangement which structurally corresponds to the first mentioned pressing arrangement, and a second means mounting the second pressing arrangement adjacent a side opposite said one side of said accommodating chamber, and wherein said second mounting means structurally corresponds to the first mentioned mounting means.

12. The layer press as claimed in claim 11 wherein the first mentioned and the second mounting means are interconnected to operate synchronously.