EP1840058B1 - Device for decelerating and/or accelerating printed sheets or exemplars separated from a sheet like print substrate - Google Patents

Description

The invention relates to a device for slowing down and / or accelerating printed sheets or copies separated from a web-shaped printing material according to the preamble of claim 1.

When transporting sheets or separated by a sheet-like substrate copies by the components or assemblies of a printing press, such as a folder of a printing press, it is inter alia necessary to slow down the sheets or copies from an initial speed to a final speed or to accelerate. So z. Example, separated from a web-shaped substrate and possibly pre-folded with Längsfalzen and / or transverse folds copies are braked in the range of a folding table of a folder, so as to be able to form a Längsfalz in the folding table.

According to the prior art, the braking of the sheet or copies by means of brushes or magnetic brakes takes place. When slowing down or braking of printed sheets or copies by means of brushes or magnetic brakes, a discontinuous or abrupt deceleration of the printed sheet or copies takes place. There is a risk here that the printed sheets or copies to be braked shift or twist. A shift or rotation of the sheet or copies to be slowed down or slowed down affects the folding quality and is therefore disadvantageous overall.

In the post-published DE 10 2005 017 411 a device for slowing down and / or accelerating printed sheets or separated from a web-shaped substrate copies is described in which the sheets or copies are continuously slowed down or accelerated from an initial speed to a terminal speed. The sheets or copies are performed when slowing down or accelerating between two opposing institutions, the rolling on the sides of the sheets or copies devices designed as attached to planetary gears cams, each planetary gear is rotatably mounted in a fixed ring gear, wherein the cams via a respective attachment point on the respective planetary gear rotatably or non-rotatably mounted, and wherein the attachment points are moved by two opposing cam in the rotation of the planetary gears in the respective fixed ring gear on a straight line such that the distance between the attachment points of the sheet or Copy either enlarged or reduced, so as to continuously accelerate or slow down the sheets or copies.

From the DE 39 40 960 A1 a device having the features of the preamble of claim 1 is known, wherein in this device, the rolling on the top and the bottom of copies devices are each designed as cams.

After DE 199 55 819 A1 The rolling on opposite sides of copies facilities are also each designed as a cam.

The DE 199 03 120 A1 shows a device for slowing down of products, wherein the rolling on opposing Rare products of Einre Lungungen are each formed as rollers.

The WO 2007/087858 A1 relates to a device for braking sheets to be deposited on a stack, in particular paper or cardboard sheets, with at least on one side of the transport plane of the sheets over the width of the device arranged rotating antrelbbaren clamping elements having clamping zones that temporarily during circulation to the inlet plane of the Arches extend, with a counter-rotating on the opposite side of the transport plane of the sheets arranged counter element, so that an arc between the clamping zones and the counter-element is clamped, wherein the clamping elements are each connected to a unglelchförmlang Drehantrleb, wherein the clamping elements on a portion of its circumference annular segment-shaped Have clamping zones and in the sheet running direction at a distance in front of the clamping elements a deflection device is arranged, from which the sheet trailing edges are deflected from the inlet level down.

Further prior art is known from DE 30 07 435 A1 known.

On this basis, the present invention is based on the problem to provide a novel device for slowing down and / or acceleration of sheet or separated from a web-shaped substrate copies.

Fig. 1:

eine schematisierte Ansicht einer erfindungsgemäßen Vorrichtung zur Verlangsamung und/oder Beschleunigung von Exemplaren beim erstmaligen Kontaktieren eines zu verlangsamenden oder zu beschleunigenden Exemplars; und

Fig. 2:

die erfindungsgemäße Vorrichtung der Fig. 1 beim Freigeben eines verlangsamten oder beschleunigten Exemplars.

This problem is solved by a device according to claim 1. Preferred embodiments of the invention will become apparent from the dependent claims and the description below. Embodiments of the invention will be described, without being limited thereto, with reference to the drawings. Showing:

Fig. 1:

a schematic view of a device according to the invention for slowing down and / or acceleration of specimens when first contacting a to be slowed down or accelerated copy; and

Fig. 2:

the device of the invention Fig. 1 when releasing a slowed or accelerated copy.

Hereinafter, the invention with reference to Fig. 1 and 2 described in more detail.

Fig. 1 and 2 show different views of a device 10 according to the invention, which serves to slow down of longitudinal folds and / or transverse folds pre-folded copies 11 of a printed, web-shaped printing substrate. The device 10 according to the invention is arranged in the region of a folding apparatus, namely seen in the transport direction of the copies 11 according to a Querfalzeinheit and before a second Längsfalzeinheit. The specimens 11 are moved in the direction of the arrow 12 by the folder and the device 10 according to the invention and thereby continuously slowed down in the region of the device 10 according to the invention starting from an initial speed to a terminal speed.

Although the invention for the embodiment of a continuous slowing down of specimens is described below, it should be noted at this point that the device according to the invention can of course also be used for accelerating specimens. Furthermore, the device according to the invention can be used for slowing down or accelerating printed printed sheets.

The inventive device 10 has according to Fig. 1 and 2 via at least one rolling on a top of the copies 11 device 13 and at least one on a bottom of the copies 11 rolling device 14, wherein Fig. 1 and 2 each only one such device 13 and 14 show. Depending on the format width of the copies 11 to be slowed, however, a plurality of such devices 13 and 14 are usually arranged at a distance from one another, both in the region of the upper side and in the region of the lower side.

The devices 13 and 14 are drivable in such a way that when the devices 13 and 14 first contact a specimen 11 to be slowed down (see FIG Fig. 1 ), Contact areas 15 and 16 thereof have a peripheral speed which corresponds to the initial speed of the specimen 11.

Starting from this peripheral speed, the devices 13 and 14 can then be continuously slowed down in the direction of the final speed of the item 11 to be slowed down. For this purpose, the rotational speed of the devices 13 and 14 is continuously reduced such that the peripheral speed of the contact regions 15 and 16 of the devices 13 and 14 is reduced continuously.

In the illustrated embodiment of the Fig. 1 and 2 Accordingly, the contact areas 15 and 16 of the devices 13 and 14 when first contacting a slowing copy 11 over a peripheral speed corresponding to the initial speed of the slowing down copy 11. Then, when the devices 13 and 14 release the slowed down to the final speed copy 11 (see Fig. 2 ), the contact areas 15 and 16 of the devices 13 and 14 have a circumferential speed which corresponds to the terminal speed of the item 11 to be braked or slowed down. In between there is a continuous reduction of the peripheral speed of the contact areas 15 and 16, namely the fact that the rotational speeds of the devices 13 and 14 are continuously reduced.

Following the release of a slowed copy 11 (see Fig. 2 ), the devices 13 and 14 are acceleratable so that they contact a next-to-slow copy in the cycle of the printing press or the folding apparatus such that the contact areas 15 and 16 of the same when the next to be slowed or accelerated copy 11 for the first time is contacted, in turn, have a peripheral speed, the the initial speed of the next to be slowed down copy 11 corresponds.

Accordingly, each rotation of the devices 13 and 14 are not driven at a constant speed, but the rotational speed of the devices 13 and 14 is varied within one revolution.

The institutions 13 and 14 is assigned a common self-propelled, in which case z. B. the rolling on top of the copy 11 devices 13 are directly driven by the self-propelled, whereas the rolling on the bottom of the copies 11 devices 14 are indirectly driven by the devices 13 from.

In the illustrated embodiment of the Fig. 1 and 2 is the or each rolling on top of the copies device 13 as a cam and the or each rolling on the bottom of the copies 11 device 14 designed as a roller. The entire outer surface of the roller 14 forms the contact region 16 of the device 14, so that accordingly the contact region 16 of the device 14 extends over its entire circumferential extent. In the case of the device 13 in the form of a cam, on the other hand, the contact region 15 thereof extends only over a defined angular range. Outside this angular range, the cam has a reduced outside diameter so that it can not contact a specimen 11 in this area.

The two devices 13 and 14 are preferably coated at their contact areas 15 and 16 with polyurethane. By changing the distance between the rolling on the top and the bottom of the copies 11 facilities, the device can be adapted to a different thickness to be slowed copies 11.

The peripheral speed of the devices 13 and 14 corresponds to the initial speed of the copy 11 at the time when they first contact a copy to be slowed down. Subsequently, the devices 13 and 14 are continuously slowed down in terms of their rotational speeds and thus peripheral speeds, thus the item 11 to be slowed down decelerate continuously. After the devices 13 and 14 have released the slowed-down specimen 11, the devices 13 and 14 are accelerated to subsequently contact and decelerate a copy to be decelerated next to the printing press in the above manner.

LIST OF REFERENCE NUMBERS

10

contraption

11

copy

12

arrow

13

Facility

14

Facility

15

contact area

16

contact area

Claims (1)

1. A device (13) for slowing down and/or accelerating print sheets or copies severed from a web-like substrate, with at least one first device (13) rolling on a top side of the print sheets or copies and at least one second device (14) rolling on a bottom side of the print sheets or copies, between which print sheets or copies which are to be slowed down or accelerated can be moved through, wherein the devices (13, 14) continuously slow down or accelerate the print sheets or copies starting out from a starting speed to an end speed, characterized in that the first device (13) rolling on the top side of the copies are formed as cams and the second device (14) rolling on the lower side of the copies is formed as a roll, wherein a surface of the roll (14) over its entire circumferential extension forms a contact region (16), and wherein a surface of the cam (13) forms a contact region (15) merely over a defined angular region, wherein the devices (13, 14) are driven in such a manner that when the devices (13, 14) with their respective contact regions (15, 16) contact a print sheet or a copy for the first time, the contact regions (15, 16) of the same have a circumferential speed which corresponds to the starting speed of the print sheet or copy, in that starting out from this the devices (13, 14) with their respective contact regions (15, 16) and thus the print sheet or the copy can be continuously slowed down to or accelerated to the end speed, and in that when the devices (13, 14) with their respective contact regions (15, 16) release the copy slowed down or accelerated to the end speed, the devices (13, 14) with their respective contact regions (15, 16) can be accelerated or slowed down in such a manner, that the same contact a copy to be next slowed down or accelerated in such a manner that the contact regions (15, 16) of the same in turn have a circumferential speed when the same contact the copy next to be slowed down or accelerated for the first time, which corresponds to the starting speed of the copy, wherein the first device rolling on the top side of the copy and the second device rolling on the bottom side of the copy are assigned a common own drive, which drives the first or the second device directly and the respective other device indirectly via the directly driven device.

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