JPH07206189A - Device to separate printing papers flatly stacked on guide device - Google Patents

Abstract

PURPOSE: To provide high allowance in the case of separating printing paper, and to easily allow disassembling for an operation of an apparatus, by providing a separating member formed into a frame shape, which has an side end extended to a direction contrary to a separation direction, and by providing a wedge- shaped edge, facing to a stack, for separating action. CONSTITUTION: Printing paper 2 is mounted as a stack 4 on a mounting plate 5 of a guide device 3 comprising an angle 6. A releasing device 7 is provided to act on a corner of the printing paper 2 comming into a stack 4 side from a lower side, and the releasing device 7 separates the corner from the remaining stack 4 by vacuum acting on the frontmost printing paper by an oscillating sucker head 8. A separating member 9 advances thereafter into an opening generated by the separated corner of the paper 2. The vacuum is interrupted to release the partially separated printing paper 2. The separating member 9 makes a fold of the gripped printing paper 2 separated from the stack 4 with a length of the fold reach to an acting range of a conveying rotor 10. The rotor 10 is provided with a gripper 11 to grip the paper 2 uniformly.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a device for the separation of printing paper which is stacked flat on a guiding device and has head- or foot-folds laterally and parallel to the transport device. Separation device for gripping the corner formed by the head- or foot fold and the part following the fold, respectively, of the frontmost printing paper, and in cooperation with the separation device in a timely manner, the printing gripped along the part following the fold A release rotor for separating the paper from the stack, the transport rotor rotating about an axis arranged substantially parallel to the folds of the separated print paper and receiving the print paper separated from the stack; Regarding the device.

2. Description of the Prior Art Devices of this kind are known as paper trays and are used in the supply of collecting machines for the production of magazines and books. The printing paper is fed into the guiding device either manually or mechanically so that it forms a substantially vertical or horizontal stack. Each front or bottom printing paper of the stack is gripped and destacked from the stack by a mechanical (gripper) or pneumatically (sucker) controlled separating device from below in the area of the fold edges, i.e. the corners of the printing paper. Is discharged). The separating member, which cooperates with the separating device and is formed as a rotating disk with a peripherally projecting edge, separates the printing paper gripped by the separating device from the front corner in the direction of rotation of the separating member. Turn into the gap formed between the rear pull-off device and the stack,
As a result, the printing paper is picked up by the rotating penetrating separating member from the stack in the region near the fold and subsequently received by a subsequent transport device which rotates about an axis substantially parallel to the fold edge that has been pulled apart. be able to. The transport device has a controlled gripper element around a drum-shaped rotor, which grips the printing paper along the fold edges and subsequently pulls it away from the stack. The disc-shaped separating member requires a relatively large space due to its geometry and the accessibility of the work required for the assembly. Moreover, the spinning disc has been found to be unsuitable due to the friction on the printing paper caused by its large extent.

SUMMARY OF THE INVENTION The object of the present invention is to provide a device of the general concept described at the outset, which has a high tolerance in the separation of printing paper without the drawbacks of the prior art and without lateral head folds. And to ensure easy disassembly for operation of the device.

The above problems of the present invention are as follows.
This is solved by a frame-shaped separating element with lateral edges extending in the direction opposite to the separating direction and having a wedge-shaped separating-facing edge. Thereby, a spatial separation of the printing paper withdrawn from the succeeding printing paper or from the stack is achieved over the length of the crease edge directed towards the transport rotor. Optimal delivery is performed at the gripping point between the printing paper and the transport rotor that are pulled out at the same time.
The acceptability of receipt by the transport rotor is at least oriented towards the printing paper of the separating action leading edge of the separating member with controllable compressed air conduits which is partially pulled away from the stack.
It has one opening, which makes it possible to support the abutment of the printing paper on the transport drum by means of the air pressure applied immediately after the leading edge has entered. To this end, the separating member can be connected to the flexible conduit and a source of compressed air. The feeding and advancing and advancing and advancing of the separating member should be carried out gently, whereby the relatively long edge which acts as a separating element on its front side when entering the stack forms an acute angle with the fold edge forming the plane. And is substantially parallel to the fold edge at the partitioned and pivoted end position. Advantageously, the closed-moving trajectories of the separating edges are formed in the shape of an arc inwardly of the stack, so that a non-uniform movement result or a vertical entry process can be prevented. Reasonably the separating member is combined with the lever device in order to achieve an arcuate movement. Stacks to prevent other printing papers from being entrained by friction between the printing papers or separating members, especially the printing papers to be pulled out and the succeeding printing papers or separating members and the printing papers above it. It is preferred that the guide device forming the has a vertical guide member at the front edge of the stack edge, the lower end of the guide member engaging in a guide groove arranged on the surface of the separating member. The invention will now be described in greater detail on the basis of the illustrated embodiment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the illustrated embodiments. 1 and 2 show a front view of an apparatus 1 according to the invention for separating stacked, crease-printed printing papers 2. The printing paper 2 is shown schematically and is mounted as a stack 4 arranged vertically on a mounting plate 5 in a guiding device 3 consisting of angle elements 6. Of course, unlike the state shown in FIG. 1, it is also possible to form the stack 4 in which the printing papers 2 are arranged vertically and aligned with each other and horizontally stacked. This hardly changes the way the device 1 according to the invention functions. However, in the exemplary embodiment according to the invention, the printing papers 2 are arranged in a stack, whereby the last fold is the head or foot of the printing paper 2 and is also referred to as the paper stacker 1. 2 in the guide device 3, which is shown on the right side of the stack in FIG. 2 and on the rear side in FIG. The corners of the bottommost printing paper 2 formed by the last and penultimate folds are used for a clear removal, respectively. 2 and 4
It is clear from this that a release device 7 is provided for this purpose which acts on the corners of the printing paper 2 coming from below towards the stack 4, which release device is attached to the frontmost printing paper 2 on a pivotable soccer head 8. The working vacuum separates this corner from the remaining stack 4 (FIG. 4). The separating member 9 then enters the opening 14 created by the separated corners of the printing paper 2. The vacuum is interrupted in the sucker 8 and the partially separated printing paper 2 is released from the separating device 7. The separating member 9 is such that the gripped printing paper 2 is at least tilted to partially destack from the stack 4 at the length of the fold and the released fold is the separated fold that is disposed thereunder. On the other hand, the working range of the transport rotor 10 rotating about axes that are substantially parallel is reached. The transport rotor is provided at least with a gripper 11 which is arranged at the periphery in parallel to the axis of rotation, so that the printing paper 2 can be gripped uniformly. According to FIGS. 1 and 4, the frontmost (bottom) printing paper 2 is gripped by the football 8.
According to FIG. 1, the separating member 9 formed in the shape of a frame is the stack 4
Immediately before entry into the opening 14 caused by the separated printing paper 2 below. The front edge of the separating member 9 facing the stack 4 is formed in a wedge shape (FIG. 4) and, according to FIG. 3, the lateral ends are curved in an arcuate or irregular rearward direction opposite to the separating movement direction. As a result, when the separating member 9 enters or swivels into the stack 4, vertical entrance is prevented and a retracted kicker or pinch-like movement occurs. The advancing movement of the separating member 9 following the starting position shown in FIG. 1 takes place in an arc, i.e. the separating member pivots by the feed and lateral movement components to enter below the stack 4 and to the bottom. It is pulled completely under the stack 4 according to the printing paper 2 and keeps the separating member in the starting position again. In the advancing movement of the separating member 9, the separating member has a set angle of less than 30 ° with respect to the opposite edges which follow the fold of the printing paper 2. This set angle depends on the shape of the separating edge of the separating member 9. The wedge-shaped edge of the separating member 9 facing the stack is formed substantially parallel to the lower surface of the stacked printing papers 2 and is rounded at the tip. The stack 4 is loosened by a pull-off movement initiated by each advancing of the separating member 9 and the retraction of the sheets takes place in a plane in which the advancing movement of the separating member 9 rises, i.e. the drive element and the separating member 9 are inclined. It is suitable for working in a plane (FIG. 4). The advancing and separating movements take place on closed movement trajectories, for which arcuate members are provided. This movement is carried out by a lever device 17 drivingly connected to the separating member 9. To this end, a double lever 18 is provided, which has two arms which are angled relative to one another, one of which is fixed at its free end with the separating member 9 and at the free end of the other lever arm. Is pivotally connected to the first arm 21 of the lever device 17. Moreover, the swivel axis 19 of the double lever 18 is swivelably fixed to a second lever 20 formed as a link. Both the levers 20 and 21 are arranged with their opposite ends positioned in a fixed position. When the printing paper 2 is finally drawn in by the conveying rotor consisting of the guide device 3 or the magazine, no frictional coupling occurs due to the contact with the printing paper 2 which is situated opposite, this printing paper or another printing paper 2 being respectively entrained. The guide device 3 has a guide member 14 between the two angled elements 6, which guide member comprises a separating member 9.
It is prevented that the next printing paper of the printing paper 2 which is engaged in the guide groove 16 provided at the lower end of the paper and is to be separated from the guiding device 3 is removed.

According to the invention, the device of the general concept described at the outset eliminates the drawbacks of the prior art and provides a high degree of tolerance in the separation of printing paper and a printing paper without head creases on its side. It can be configured to ensure easy disassembly and adjustment of the device when in use.

[Brief description of drawings]

1 is a perspective view of a separation device according to the present invention. FIG.

2 shows the separating device according to FIG. 1 with the separating member partially entering the stack.

3 is a plan view of the separating device according to FIG. 2;

4 is a cross-sectional view of the separation device taken along line IV-IV of FIG.

[Explanation of symbols]

 2 Printing Paper 3 Guide Device 4 Stack 7 Release Device 9 Separation Member 10 Conveyor Rotor

Claims (10)

[Claims] 1. A device for separating printing papers, which is stacked flat on a guiding device and has head- or foot folds laterally and parallel to the transport device, each front of the stack (4). Of the printing paper (2) of the present invention, which cooperates in a timely manner with a release device (7) and a release device for gripping the corners formed by the head-or foot folds and the part following the folds,
Following the separating member (9) that separates the printing paper (2) gripped along the part following the fold from the stack (4), it is arranged substantially parallel to the fold of the separated printing paper (2). In said device comprising a transport rotor (10) which rotates around an axis and which receives the printing paper (2) separated from the stack (4), the separating member (9) formed in a frame shape has a separating movement direction. A stack-facing edge having a wedge-shaped separating action with a lateral end extending in the opposite direction. 2. A device according to claim 1, wherein the separating edge of the separating member has at least one opening of a controllable compressed air conduit directed onto the first part pulled away from the stack of printing paper. . 3. The device according to claim 1, wherein the separating member (9) has a lateral end formed in an arc shape. 4. Device according to claim 3, characterized in that the separating member (9) is arranged at an acute angle with the part of the printing paper which follows the crease upon entry into the stack (4). 5. The wedge-shaped edge of the separating member (9) facing the stack (4) is formed substantially parallel to the lower surface of the stacked printing papers (2). apparatus. 6. Device according to claim 5, wherein the separating member (9) is driven in an inclined plane for the generation of the separating force of the stack (4). 7. The method according to claim 1, wherein the closed motion trajectory of the separating edge of the printing paper (9) is formed in an arc inside the stack (4). The device according to one. 8. Device according to claim 7, which is associated with a lever device (17) which is pivotally actuated to cause the separating member (9) to draw a trajectory of movement. 9. A two-arm lever (18) which is mutually angled is provided, one end of which is fixed to the separating member (9) and whose pivot axis (19) is the second lever (20). 9. Device according to claim 8, wherein the other end is pivotally connected to the first lever (21) of the lever device (17). 10. A guide device (3) for guiding the stack (4) has a guide member (15) for the front edge of the stack, the guide member at the front end of the stack relative to the plane of movement of the separating member (9). The device according to claim 1 or 2, wherein the device is engaged in guide grooves (16) arranged substantially parallel to each other.