DE1963712C

DE1963712C - Sheet delivery device on printing machines

Info

Publication number: DE1963712C
Application number: DE19691963712
Authority: DE
Inventors: Karl 6051 Dietzenbach Conrad
Original assignee: Roland Offsetmaschinenfabrik Fa ber & Schleicher AG, 6050 Offenbach
Filing date: 1969-12-19
Publication date: 1973-02-15

Description

j ι· or._nPnvnrderkante von den Nachgreifern 6j ι · or. _nP nvnrderkante of the follow-up grippers 6

Fig. 1 die Seitenansicht einer Bogenauslegevor- rend,die Bogenvor ™« _{interende von} einer Saugrichtung mit erfindungsgemäßer Bremsvorrichtung, erfaßt ist, wira aas d & ^ besteht ge-Fig. 2 einen Teil einer Draufsicht gemäß Fig. 1 wabe 14 ^"f ^un^S von auf einer drehbain vergrößertem Maßstab, und ^maßZ\f ifLSeten Scheiben 16, die an ihrer* Fig. 3 einen vergrößerten, die erfindungsgemäße 5 f»«^^. Durch Ansaugka-Bremsvorrichtung darstellenden Ausschnitt aus ^U^| ⁰J[^_{1 ei}n_em nicht dargestellten. Unter-Fig. 1 is a side view of a Bogenauslegevor- that Bogenvor ™ _"inter-end is detected _by a suction with the inventive braking device rend, wira aas d ^ is Ge Fig. 2 is a part of a plan view according to FIG. 1 honeycomb 14 ^ "f ^un ^ S from a scale enlarged on a rotary bain, and ^measured Z \ f ifLSeten disks 16, which on their * FIG . ^ By performing Ansaugka braking device section of ^U ^ | ⁰ J [^ _{1 ei} n _e m not shown lower.

¹Du₁Ch die Kettengreifer 1 eines endlosen Ketten- druckerzeuger verbunden smd· ^^JSfAi« förderers2 werden bedruckte Bogen3 in Pfeilrich- oberen ^fe^^h .ffJÄSk _verSorgt. Der Untertung von einem nicht dargestellten Druckwerk einer io öffnungen ¹⁷ ^^"^„^ _{der H}öhe verändert und Druckmaschine über den Auslegerstapel 4 gefördert. druck kann unte.*«*^ ™ ^Q _{d Zwischen} um Zwei an ihren Greifflächen mit Saugdüsen (s. auch im Maschinentakt gf^steue" r^emsvorrichtuneen 19 Fig. 2) versehene Nachgreifer 6 sind jeweils an Saugscheiben 16 sind weitere Bremsvorrichtungen^v ¹ You ₁ Ch smd the chain gripper one of an endless chain pressure generator connected · ^^ JSfAi "förderers2 be printed Bogen3 in direction of the arrow top ^fe ^ ^h .ffJÄSk _verse orgt. The sub-Tung of an unillustrated printing unit of a openings io ¹⁷ ^^ '^' ^ _H Öhe changed and conveyed printing machine on the delivery stack. 4 pressure can * «* ^ ™ ^Q _d unte. _Intermediate to two of their gripping surfaces with suction nozzles (s . Also in the machine ^cycle gf steue "r ^ emsvorrichtuneen 19 Fig. 2) provided after grippers 6 are each on suction disks 16 are further braking devices ^ v

einem auf einem Zapfen 7 gelagerten Rollenhebel 8 an geordnet^diejjeweij^{Is aus} ^ _{21 versehen ist}; angeordnet. Die Rolle 9 des Rollenhebels steht unter X5 deren Oberflache ^mit ^^augo"ⁿ „1. _BohrUneen η Wirkung einer Zugfeder 10 in Kontakt mit einer Kur- Die Saugöffnungen 21 smd uwr bo ^ -. venscheibe 11, die mit Maschinendrehzahl, d. h. syn- (F i g. 3) und Anschlußschlauche,23 mit einem mjn chron mit der Bogenanförderung, rotiert. Entspre- dargestellten UnterdrucKerzeug=^l . · ' chend der Form der Kurvenscheibe 11 schwenk sn die Saugöffnungen 21 sind "»ogiicn-. n«u ■a roller lever 8 mounted on a pin 7 is provided at an ordered ^ diejjeweij ^{Is from} ^ ₂₁ ; arranged. The roller 9 of the roller lever is under X5 whose surface ^with ^ ^augo " ⁿ " 1. _BohrU neen η Effect of a tension spring 10 in contact with a curve. The suction openings 21 smd uwr bo ^ -. Venscheibe 11, which is syn- (F i g. 3) and connecting hoses, 23, rotates at a mjn chron with the Bogenanförderung. correspond vacuum producing = ^l. · 'shown accordingly the shape of the cam 11 pivoting sn the suction ports 21 are "" ogiicn-. n «u ■

chend der Form der Kurvenscheibe 11 schweif» die SaugöffnungAccording to the shape of the cam 11, the suction opening sweeps

Nachgreifer 6 im Maschinentakt hin und her, über- μ hinterkante angeordnet, uie riuucNachgreifer 6 back and forth in the machine cycle, arranged over- μ rear edge, uie riuuc

nehmen die Bogen 3 von den Kettengreifern 1 und Ie- ist in bekannter Weise veränderbar undtake the sheets 3 from the chain grippers 1 and Ie- can be changed in a known manner and

i ichen die vorderen gleichzeitig als Gerad erbar Die Leisten 21 sind ^maß Figi ich the front ones can be developed as a straight line at the same time. The strips 21 are measured in Fig

nehmen die Bogen 3 von den Kettengreifern 1 und Ie ist in bekan ^take the sheets 3 from the chain grippers 1 and Ie is known in ^

gen sie zwischen die vorderen, gleichzeitig als Gerad- erbar. Die Leisten 21 sind ^maß Fig.^^eweUs ηPlace them between the front ones, at the same time as being straightable. The strips 21 are ^ measured Fig. ^^ eweUs η

stoßer wirkenden Anschläge 12 und die hinteren An- Bogenlauiachtung gesehen in emerLmie hinter ύ,η butt-acting stops 12 and the rear end of the arc seen in emerLmie behind ύ, η

schlage 13 (s. auch F i g. 2) auf dem Stapel 4 ab. Wäh- jeweiligen Nachgreifern 6 angeordnet.knock 13 (see also Fig. 2) on stack 4. Selecting the respective follow-up grippers 6 are arranged.

Hierzu 1 Blatt Zeichnungen 1 sheet of drawings

Claims

The suction roll is curved and therefore of different sizes depending on the rigidity of the sheet to be laid out. In extreme cases, with particularly stiff cardboard, reduced

1. Sheet delivery device for printing machines, the effective area on a line, namely the NEN, in which the sheets by endless Kettenför- 5 uppermost Mantelünie of the suction roll. This disadvantage those conveyed over the delivery stack and under the suction roll is particularly clear from the time Participation of a suction roller and an additional point at which the trailing edge of the sheet is the top Braking devices on the delivery stack traversed ManteUinie the suction roll. Depending on the Malegt are characterized by the machine speed and arch stiffness that one or more of the additional braking io sub-devices sucking in the arch at this point (19) Broken or disturbed as seen in the direction of travel, causing considerable disturbance between the top surface line of the gene with proper sheet delivery on the suction roll (14) and the rear edge of the bottom can .. Will the braking effect on the stack of sheets (4) are arranged in the boom. interrupted too early at the end of the

2. Sheet delivery device according to claim 1, 15 rear end to "overtake" the front end of the sheet, characterized in that the Bremsvorrich- and the sheet slip together. In some cases device (19) one provided with suction openings (21) is sufficient to briefly lift the sheet belt inside pneumatic, stationary braking device is. end, as the arc that follows at a short distance

moves against the raised sheet and then turns it over ao.

The invention is based on the object of

sheets coming to a printing press are tightened and even and without smearing of the ink application

The invention relates to a sheet laying out a clean stack and the disadvantages

Device for printing machines in which the sheet is to be removed as a suction roll.

according to the invention, this task is achieved by an endless chain conveyor on the boom

pel promoted and with the assistance of a suction roll or several of the additional braking devices

and additional braking devices on the trigger, which are stationary when viewed in the direction of sheet travel

stacked stacks are deposited. between the top line of the suction roll and

Such a sheet delivery can be seen through the clear 30 rear edge of the sheet stack in the delivery Patent specification 1 148 564 known in which are ordered.

Brake rollers above braking suction rollers This measure surprisingly brings the

Arranged to a success desired by an endless chain. The arches are

tenförderer over a boom stack conveyed bar held taut before being placed on the stack

Delay sheet package. The effect of with the 35 and lay down smoothly. Appropriately be

Brake rollers working together with suction rollers, the braking devices as close as possible to the rear

but terminates as soon as the end of the sheet bundle is positioned at the edge of the delivery stack.

Leaves line on which the suction roll and brake roll. In an embodiment of the invention, the brake

touch. in the direction of a pneumatic

Another bow boom is by the German 40 see, stationary braking device.

Patent 613 007 known. The pneumatic devices operated by external pressure, such as suction nozzles

machine coming to be laid out on a stack, are structurally less complex and stressful

the sheets are transported by chain conveyors over the sheets or the paint on the sheet.

Stack conveyed and transferred to an auxiliary conveyor device, do not generate as much as, for example, one on the

Often referred to as follow-up grippers or removal grippers, 45 with a pressed brake roller. The braking force is lighter

hand over which the sheets can be put down on the stack.

At the same time, one with a smaller circumference acts. The suction nozzles are expediently transverse

speed as the sheet speed is designed to be rotatable to the sheet running direction, so

Rende suction roll in a known manner on the sheet that they turn over for the purpose of perfecting sheets

end one, so that the sheets remain taut and can be moved to a color-free part of the sheet,

can just lay on the pile. Furthermore, the braking device is expedient

A sheet delivery device with an auxiliary conveyor approximately in the direction of pull is a known one

the device for detecting the leading edge of the sheet moved back and forth on the front part While the sheets are being deposited on the stack, the auxiliary conveying device acting on the sheets is

also ordered by British patent 791 600. Auxiliary conveyor and braking device

knows. are viewed in the direction of sheet travel on a

Rotating suction rollers are arranged to slow down bores, so that the bows do not have any tensile forces

genes have proven themselves in practice. In contrast, it must take up in the transverse direction and therefore not

to a stretching over the entire arch width is warped. When using two follow-up

kenden squeegee, the differential speed is 60 in this case, also two sheet brake

to be arranged between an arch and the circumference of a rotary.

the suction roll is less and can be changed and the time the braking device acts on the

being controlled. This is of particular importance because it is sensible to control it. This allows the

in the case of perfecting with folded back, effect on the end of the sheet on the straight, necessary

gen, since then at a low differential speed 65 maneuverable dimensions are limited. The bow is

smearing on the suction roll is avoided. protects and saves energy.

However, the external shape of the

SauBwalze proven: The effective surface of the matically shown, namely shows