ES2311656T3 - COLLECTOR DEVICE AND PROCEDURE FOR OPERATION. - Google Patents

Abstract

Collecting device for collating sheets (14), especially printed paper sheets, to form a stack of sheets comprises a rotating body (1) rotatably mounted about its axis (A), a drive for rotating the rotating body, at least one securing mechanism (4) for securing a number of sheets in the form of a stack in the region of the front edges (15) of the sheets on the outer surface (3) of the rotating body, and control devices for actuating the securing mechanism. An arriving sheet during rotation of the rotating body is secured by the securing device so that its front edge is held flush with the front edge of the stack. An independent claim is also included for a process for operating the above collecting device.

Description

Collector device and procedure for functioning.

The present invention relates to a collecting device and a procedure for its operation according to claims 1 or 9.

For the manufacture of printed products, by eg newspapers or brochures, particularly in short runs, are they increasingly use digital printing machines. These print, as a rule, all sheets for a product printed sequentially one after the other. For the elaboration of the printed product you have to gather the sheets, if necessary later of a cutting process. By gathering means the superposition of sheets to form piles of sheets, in which the sheets individual are oriented towards each other at least by an edge. The other folding steps and / or are connected bound.

Also conventionally printed sheets, is say with current presses, it must be gathered for the manufacture of a printed product. To do this, they know each other collecting devices which gather the printed sheets with Priority in a big roll. Collecting devices known present, for example, a large number of bags or draggers, who impersonate several supply stations At the same time, at each station of supply is supplied a sheet, so that finally each Bag contains all the sheets of the printed product in question. These collecting devices are not well suited for battery formation from printed and transported sheets sequentially

For document EP-A 1 209 000 and EP-A 1 219 556 are known procedures for the manufacture of a printed product, in which sheets are printed with a digital printing machine and They are folded into a collecting device to form piles of leaves. The collecting device is connected, for example, between a cross cutter, which is connected after a system digital printing, and a folding station or other organ of treatment. The collecting device according to the document EP-A 1 219 556 forms a stack of leaves, thanks to that the sheets supplied continuously are taken with a grip organ, for example a vacuum cleaner, and are deposited, about over others, in a fixed stationary place. A big number of grip bodies moves for it along a path closed. The trajectory has a partial section that runs horizontally, whose length must essentially exceed the length of a sheet This leads to a great need for space. With the stationary meeting space for the stack of sheets are also related the following disadvantages: a sheet that arrives It must be braked strongly before deposition. This leads, especially for high treatment speeds, at a great request of the sheet, so it can be undermined the processing security especially in case of sensitive papers. Processing security can only be increased by the use of complex auxiliary functions, for example elastic suspension, braked traction, vacuum braking, braking of the gripping organs. Finally, we must accelerate strongly the finished sheet pile, so that it is away from the collecting device, before another sheet is deposited. Is acceleration necessary to a speed that is greater than the speed of supply of the leaves to the collecting station. The production speed is therefore limited by the device manifold.

The document UA-A-2002/0074716 unveils also a collecting device according to the preamble of the claim 1.

The invention therefore raises the problem of indicating a collecting device which, with a high processing safety, careful treatment of the leaves and a reduced space requirement, allow high speeds of production. In addition, a procedure of corresponding operation.

The problem is solved with a device collector and an operating procedure with the characteristics of claims 1 or 7. From the subordinate claims, description and drawings advantageous improvements of the invention result.

The collecting device according to the invention It comprises a rotating body, which is rotatable supported around its axis and it can be rotated with a drive In addition, there is a clamping mechanism to accommodate and hold the leaves. Your elements that interact with the sheet are arranged in the area of the outer surface of the body rotary. The clamping mechanism serves to hold a large number of sheets, present in the form of a stack of sheets, in the zone its leading edge in the direction of rotation and also hold a new sheet by its leading edge and supply it to the stack of leaves. At the same time the leading edge of the new sheet is host aligned with the leading edges of the stack sheets of leaves, especially with the help of a stop. The orientation Lateral leaves can take place with other means. For him clamping mechanism operation serve control means adequate. Leaf reception, pile formation and delivery of the battery take place during the rotation of the rotating body. This eliminates the disadvantages that are related to a stationary battery formation position, especially braking and the acceleration of the leaves again. The leaves are treated in the flow. Since the rotating body has to present a perimeter such that it is greater than or equal to the length of the largest format sheet to be treated, the entire device saves also a lot of space. However it is also possible to provide, distributed along the perimeter, several mechanisms of clamping, in order to simultaneously form several stacks of leaves.

The collecting device is especially suitable for the treatment of individual, printed sheets sequentially especially by printing procedure digital and transported continuously. It can be used without however also in general for the formation of batteries small, for example to gather conventionally printed sheets and / or already folded, small batteries and / or superimposed transported sheets overlapping

An example of the invention is represented in the drawings and described below. In the drawings, so purely schematic:

Fig. 1a shows a collecting device with a first sheet that arrives;

Fig. 1b shows the collecting device of the Fig. 1a in side view;

Fig. 1c shows an enlarged representation of the closing mechanism;

Figs. 2a-c, 3a-c, 4a-c, 5a-c, 6a-c, 7a-c show the device collector of Figs. 1a-c in different snapshots during the procedure according to the invention.

The figures show a collecting device according to the invention in different snapshots as well as in different  seen during the performance of the process according to the invention. Figures 1a-7a show in each case a view of the collecting device including a supply device 12 and a withdrawal device 13. Figures 1b-7b show in each case a side view of the device. The figures 1c-7c show in each case a section of the Corresponding Figures 1-7, in which the clamping mechanism 4 is shown enlarged.

The central part of the collecting device is a rotating body 1, which in this case consists of three disk-type segments 2, which are arranged coaxially with respect to a rotation axis A, on a common shaft 16. The segments 2 have in each case basic bodies 2a of the disk type with a peripheral edge 2b. The three edge surfaces, including the imaginary connecting surfaces located in the middle, define an outer surface 3 of the rotating body, with which a sheet 14 is in contact, in whole or in part, during the assembly process. The outer surface 3 has, in the present case, a cylindrical lining. For the manufacture of an outer surface 3 of this type, a rotating body in the form of a solid or hollow cylinder or a body which holds a cylindrical lining surface in the peripheral area can also be used. For example, the rotating body shown in the figures may also consist of more than three segments. By rotating body 1 is meant a body rotatable around the axis A which preferably does not essentially have essentially symmetry of
rotation.

A clamping mechanism 4 comprises a set of first fasteners 5 and a set of second elements of clamping 6, of which one is assigned in each case to a segment 2. They are operated by control or non-control means represented herein, for example by a slider control or a controlled mechanical drive electronically The first and second fasteners 5, 6 have the shape of a finger 7 bent in an L-shape, which is it can rotate around an axis of rotation B that runs parallel to the axis of rotation A and that can move slightly in the direction radial. The folded end 8 has a first surface 8a, oriented towards the rotating body 1, between which and the body rotating 1 a sheet 14, 14 'can be imprisoned. The second surface 18b that runs slightly inclined with respect to it, away from the rotating body 1, it can also be located by under a sheet 14, 14 '(see clamping element 6 in Fig. 2b). A stop surface 8c (see Fig. 3c) that runs essentially in the radial direction it serves, for example, as a stop for the orientation of the leading edge 15 of a sheet 14, 14 'which arrives The fasteners 5, 6 protrude from the body Rotating 1 slightly in radial direction. The edge 2b of the segments 2 presents 2c recesses for this by means of which is also possible the turning movement.

The delivery device 12 in the form of a Conveyor belt runs horizontally and approximates the rotating body 1, seen in the direction of rotation R, approximately 45º before the highlight S, so that a sheet with only slight flexion, that is essentially Tangential, can be delivered to the rotating body 1. Enter the supply direction 12 and the rotating body 1 is located the reception area 9. The position of the rotating body 1 shown in Figs. 1b and 4b, in which the fasteners 5, 6 are found in reception area 9, is designated as the position of reception.

The withdrawal device 13 in the form of a Conveyor belt also runs horizontally and starts at the rotating body 1, seen in the direction of rotation R, approximately 30 ° after the high point S, so that a sheet can be received by the rotating body 1 with a only slight flexion, that is, essentially tangential. Between the withdrawal device 13 and the rotating body 1 is located a delivery zone 10. The position of the rotating body 1 shown in Fig. 6b, in which the fasteners 5, 6 are found in delivery area 10, it is designated as the position of delivery. Through an exclusive device out with several exclusive items out 11, which can be rotate around a rotation axis C (Fig. 6c) that runs parallel with respect to the axis of rotation A, the leading edge of a sheet 14, 14 'can be lifted from the rotating body 1, after removing turning the fasteners 5, 6, and can be transported out. The exclusive items out 11 are arranged next to and between the segments and catch below, in active state, a sheet (Fig. 6b) in order to lift it.

The function of the collecting device is explained to continuation in greater detail: a sheet 14, which comes from a printing machine or a transverse cutter, is supplied with the supply device 12 to the rotating body 1 (Figs. 1a-c) that rotates around the A axis. The body swivel is controlled in such a way that it is in the receiving position, when the leading edge 15 of the sheet 14 it reaches the rotating body 1 (Figs. 2a-c). The first fasteners 5 are slightly moved radially outward, so that its first surfaces 8a they form a host slit 17 (Fig. 1c) with the surface exterior 3, which is limited in the perimeter direction by the stop surface 8c. The second fasteners 6 are in contact with the outer surface 3 and could fix, by For example, a sheet or stack of sheets already received (comp. with Figs. 5a-c, where is this the case for the first element clamping 5). With this the sheet 14 slides over the seconds fasteners 6 in the reception slit 17 formed by the first fasteners 5. It is imprisoned there, because the first fastener 5 is moved inwards in radial direction At the same time the body continues to rotate rotary 1 (Figs. 2a-c). In the course of a full turn sheet 14 is rolled up in a way that saves space on the rotating body 1.

By additional rotation of the rotating body 1 a a first intermediate position the seconds are deactivated fasteners 6, that is, are pulled forward by turning under sheet 14 held by the element of clamping 5 (Figs. 3a-c). If the second element of clamping 6 had already held a stack of sheets fixed, this is now held only by the first fastener 5.

The second fastener 6 now rotates from return to its starting position, although it is displaced towards outside in the radial direction, so that another slit of transport 17 ', which can accommodate another sheet 14' (Figs. 4a-c). In this one another sheet is received and imprisoned 14 (Figs. 5a-c). Since the stop surfaces 8c of the first and second fasteners 5, 6 are found in the same place in the perimeter direction, the edges 15, 15 ' advanced are precisely oriented with respect to each other. Since the first and second fasteners 5, 6 are constituted identical in the present example, this situation corresponds to that of Figs. 1a-c or 2a-c.

In case of first and second elements of clamp constituted differently (not represented here) the The entire stack of sheets, including the newly received sheet, is taken from the first intermediate position by both fasteners and from a second intermediate position only for the second fastener, while the first fastener is prepared for the reception of a new sheet. Alternatively, the entire stack of sheets can be constantly held, for example by electrostatic charging, needles or external guide rollers, and the first fastener serve essentially only as a stop for the leading edge of a new welcome sheet. A stop is expendable when the device supply and the rotating body are synchronized in such a way so that the front edges are always in it place with respect to the clamping element or with respect to the edge front of the already deposited sheets. In this case it is enough with which the clamping mechanism holds the new sheet in the position in which the leading edges are aligned between yes.

The process represented in the Figures 1-5 can be repeated until all sheets 14, 14 'gathered to form a pile are rolled, at least partially on the rotating body 1. In the present example the additional sheet 14 'is already the last of the stack. Therefore it does not carry out no complete rotation of the rotating body and it is not rolled completely. Before the delivery position or reach it the exclusive items are activated out 11 and it deactivate the fasteners 5, 6 that are active, of so that the entire battery is excluded out (Figs. 6a-c). After reaching the position of reception, that is still while the first stack of sheets is located in the area of the rotating body 1, the first 14 '' sheet of a new stack of sheets (Figs. 7a-c).

The battery moves away as a rule thanks to the centrifugal force, although it can be received by fingers or tweezers Rotary or other known techniques. Preferably it is secured, with suitable means, for example electrostatic charge, crimp under pressure or external guide rollers, which stack of sheets stays together during transport with the transport device out 13.

The path velocity v_ {B} of the elements of the clamping mechanism 4 that the sheets receive, here of the reception slit 17, 17 'or the stop surface 8c, is preferably irregular during a turn. It is preferably before and upon reaching the reception position, less than the supply speed v_ {Z} of sheets 14, 14 'on the supply device 12, so that the edges 15, 15 ' advanced, for example by collision with the abutment surface 8c, can be welcomed aligned with each other. Then the rotating body is preferably slightly accelerated, to that at the arrival of the next leading edge is found of again in the reception position.

Preferably the rotation speed of the rotating body 1 adapts to the distance, which have the edges 15, 15 'forward of the sheets when supplied to the device manifold. If the document set contains for example sheets individual short, like usual half sheets in a newspaper, then it is increased at least along a part of a turn essentially the perimeter speed of the rotating body 1, of so that the rotating body reaches the receiving position, to the arrival of the next leading edge, with the speed correct. The same effect can be achieved by adapting the distance that the leading edges have with respect to the supply conveyor, for example by adapting Print speed

Claims (12)

1. Collecting device for collecting sheets (14, 14 ', 14''), in particular printed sheets of paper, for the formation of a stack of sheets, with a rotating body (1), which is rotatably supported around of its axis (A), a drive, with which the rotating body (1) can be rotated, at least one clamping mechanism (4), which is able to hold a plurality of sheets (14, 14 ', 14''), in the form of a stack of sheets in the area of its edge (15, 15'), which runs in the area of its direction of rotation, on the outer surface (3) of the rotating body ( 1), and control means for the actuation of the clamping mechanism (4), a sheet (14, 14 ', 14'') being removed and held that arrives, during the rotation of the rotating body (1), of such way by the clamping mechanism (4), that its leading edge (15, 15 ') is housed aligned with the leading edge of the stack of sheets, characterized in that the clamping mechanism (4) it comprises at least a first fastener (5) and at least a second fastener (6), which are constituted identical and can be operated independently of each other, the first and second fastener comprising (5) ) in each case a rotating finger (7), which in an open state of the clamping element (5) forms, by means of a stop surface (8c), a stop for the leading edge (15, 15 ') of the blade (14, 14 ', 14'') that arrives and, in a closed state of the clamping element (5), holds the sheet (14, 14', 14 '') together with the stack of sheets. 2. Collector device according to claim 1, characterized in that the abutment surfaces (8c) of the first and second fastening elements (5, 6) are in the same place in the perimetric direction of the rotating body. 3. Collecting device according to claim 1 or 2, characterized in that it has a supply device (12) for the supply of sheets (14, 14 ', 14'') in a plane that extends essentially tangentially with respect to the outer surface (3) of the rotating body (1), the delivery device (12) preferably comprising a transport belt or a transport table. 4. Collection device according to one of claims 1 - 3, characterized in that it has a withdrawal device (13) for the removal of piles of sheets in a plane that extends essentially tangentially with respect to the outer surface (3) of the rotating body (1), the withdrawal device preferably comprising a transport belt or a transport table. 5. Collector device according to one of claims 1-4, characterized in that the perimeter of the rotating body (1) is at least as large as the length of the largest sheet format treated with the collector device. 6. Collector device according to one of claims 1-5, characterized in that the drive is in a position to drive the rotating body (1) to irregular movement. 7. Procedure for the operation of a collecting device according to claim 1, with the steps following:

to)

operate the clamping mechanism (4) in a receiving position of the rotating body for clamping of at least one sheet (14, 14 '. 14' ') supplied in the area of its edge (15, 15 ') advanced in the direction of rotation, being the sheet (14, 14 ', 14' ') housed and held in such a way that its edge (15, 15 ') forward is aligned with respect to the leading edge of the sheets (14, 14 ', 14' ') also housed by the mechanism of clamping (4);

b)

rotate the rotating body (1) to a body delivery position swivel (1);

c1)

rotate the rotating body (1) to the reception position of the rotating body (1) and repeat the steps a) and b), in case the number of the sheets (14, 14 ', 14' ') collected is less than the number of sheets (14, 14 ', 14' ') that you have to pick up;

or

c2)

operate the clamping mechanism (4) in the delivery position of the rotating body (1) to release the or the sheets (14, 14 ', 14' ') held in case the number of sheets (14, 14 ', 14' ') collected correspond to the number of sheets (14, 14 ', 14' ') to be collected;

characterized in that said at least one first and second clamping element (5, 6) are actuated in such a way that the following is fulfilled:

-

 in the receiving position forms one of the two fasteners (5, 6), that is to say the first or second fastener (5, 6), the butt for the leading edge of a sheet that arrives while the other fastener (6, 5) holds, where appropriate, a sheet already housed

-

since the receiving position to an intermediate position the sheet newly housed is held by the clamping element (5, 6) that in the reception position it formed the stop for the leading edge of this sheet;

-

since the intermediate position to the subject receiving position, the clamping element (5, 6) that formed the stop in the position of reception, the newly housed sheet and the sheets housed in your case already below, while the other fastener, with the bumper formation for the leading edge of another sheet, is prepared for the accommodation and fastening of this sheet additional.

Method according to claim 7, characterized in that the rotational speed of the rotating body (1) is adapted to the distance of the leading edges (15, 15 ') of the blades (14, 14', 14 '') to the be supplied to the collecting device. Method according to claim 7, characterized in that the rotational speed of the rotating body (1) is irregular. Method according to one of claims 7 - 9, characterized in that the sheets (14, 14 ', 14'') of the collecting device are supplied continuously with a supply speed v Z and the rotation speed of the body Rotary (1) is adapted in such a way to the supply speed v_ {Z} that the path speed v_ {B} of the elements of the clamping mechanism (4) that receive the blades (14, 14 ', 14'' ) is, before and upon reaching the reception position and reaching it, less than the supply speed v_ {Z} and after reception of the sheets (14, 14 ', 14'') is preferably increased. 11. Use of a collecting device according to one of claims 1-6 for collecting printed sheets and supplied sequentially. 12. Use of a collecting device according to one of claims 1-6 for the manufacture of a printed product, in particular of a newspaper, by means of a digital printing machine