DE1786301A1 - Circuit arrangement for automatic sheet feeder control on printing machines - Google Patents

Description

FIjB polygraph
Druckmaschinenwerk-k Plane ta Radebeul

Radebeul, on May 12, 1970

Circuitry for automatic sheet feeder control on printing machines

The invention relates to an automatic sheet system control on printing machines depending on the sheet position on the Investment markon *

It has already been proposed that, for checking the sheet position and thus for position control, use of Fieflex measuring heads separately controlled with a downstream amplifier and a signal evaluation circuit, whereby the system is blocked and the feeder is switched off if no paper is detected on one or both of the reflex measuring heads ( Oblique or Pehlbogen).

This circuit arrangement has the disadvantage that the "investor" can only be switched off in the crooked system if the System has been activated at least once beforehand. If the first sheet enters the system at an angle, the system remains blocked, but the feeder is not switched off. Through this it is possible that the far incoming sheet is the first infiltrated. If this sheet is currently at the feed marks, the system is activated and put into the machine double sheets run in. The infeed of double sheets leads to severe malfunctions and possibly damage to certain machine systems as well as excessive amounts of macular scur.

109852 / 00B8

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The purpose of the invention is to reduce machine downtimes ^ To avoid malfunctions and damage to the machine systems as a result of double sheet infeed.

The invention is based on the object of a circuit arrangement for the automatic Uogen plant control on printing machines, in which the plant and feeder control took place as a function of the first and each subsequent sheet entering the system of the printing machine

According to the invention, this is achieved in that a clock-controlled amplifier is assigned to each Keßorgan to control the iJogenlage in the system, the outputs of which, in addition to the double arc control device, a crooked arc control device, consisting of a non-equivalence circuit and a downstream AND element that is coupled to the second input a contact which is arranged on the control lever for the feeder shutdown and shutdown and emits a signal x ^ , the output of which leads via a first OR element to the feeder shutdown and a second OR element downstream of this to block the system. ■ ■ "■" ■■ '

The invention is intended below using an exemplary embodiment will be explained in more detail.

The accompanying drawings show in Hg. 1 ί a% signal flow picture,
Pig, 2r a circuit diagram,
i'ig · 3i eina switch assignment table

0058 " ³ "

ORIGINAL

The two Ließ arrangements arranged on the i3o gene system ^of printing machines, the information carriers of which can be contact, light, sound, pressure, etc., give the signals x ^. and x ™. The principle and structure of the measuring arrangement and its evaluation are described using the example of a photoelectric reflex measuring device. Is on one of the I "IESS make a properly fitting arc registered, from this Keßstelle the signal x issued ™ with the -.Yert 0 in improperly applied Zo ^ s the signal leads x ,, the 'ert L. Signals X ^ ₁ or X ^ ₂ are each an amplifier 1 bsw. 2 forwarded; Each of the amplifiers has an AND gliod, the 1st input of which is formed by the respective signal X ^ ₁ or X ^ ₂ and the 2nd input of the signal Xfj, the outputs of the AND element represent the outputs of the amplifier f; 2. Signal Xm is a so-called clock signal, which is emitted by an actuating switch in each case sum iueßzeitpunkt LI. 'The outputs of the amplifiers 1; 2 are OR elements 3f4, the outputs of the OR elements are an AND element 6 and an itegator 7, this is a further negator 8 and an AND element 9, whose 2nd input is from the bridging clock signal xn, which assumes the .Vert L in the pauses of the clock signal Xm (see -Pig. 2), is formed, downstream; the output of the AND element 9 forms the 2nd input of the OR elements 3 and 4 "

Furthermore, the negator 7 is a delay element 14, an AND element 13 and an OR element 12 downstream.

The 2nd input of the Ünd element 13 is the output of the OR element 4 downstream. The output of the OR element 12

109852/0058

forms the signal output y.j for feeder control; leads y ^ the value L, the investor is switched off, i.e. the further Sheet feed interrupted »

The OR terms 3; 4 is also a non-equivalence circuit 10 and an AND element 11 is arranged downstream. The second input of the AND element 11 is formed by the signal χ *. The signal X ₁ is generated by a contact coupled to the control lever for the feeder division and division. Investor at means the start of the ogen funding, where X _{1 leads} the v / ert L; Feeder ab means the end of the _{sheet conveyance, where X 1 leads to} the value 0. The output of the AND element 11 represents the second input of the OR element 12.

There is still 3 in the Or members; 4 downstream of an OR element 5, the 3rd input of which is formed by the output of the OR element 12. The output of the OR element 5 forms the signal output y ₂ for the system control; _{if y 2} results in «7ert L, the system is blocked; _{if y g} results in the V / ert O, the system is activated.

The operating principle of the circuit arrangement is as follows: In the idle state, the signal outputs y ₁ and y 'have assumed the' Vert O.

When the printing press is started up (idle), there is no sheet at the measuring points, ie the signals X ^ ₁ and χ ~ ₂ carry the value L; At the time of measurement M, the clock signal Xm also carries the V / ert L. As a result of the fulfilled AND condition x _M1 = x _T = Ij Xj ₅₂ = Xf] I = £ becomes 1 from the amplifiers; 2 via the OR elements 3; 4 and the OR element 5 is fed a signal with the value L to _{the signal output y 2;} ie the system of the printing machine is blocked. 1098 5 2/0058 -5-

BATH ORIGINAL

To bridge the T-act pauses of the clock signal x _T , the two output signals with the value I, the amplifiers 1 and 2 are fed to an AND element 9 via an AND element 6 with subsequent double negation by the Kicht elements 7 and 8, in the second input of which is the bridging clock signal xy, which assumes the r / ert "L" in the pause _{of the clock signal x T.}

The circuit diagram for the two clock signals x ^ and xy shows ilgur 2, so as long as no paper gets into the system, the amplifier outputs xL · and XjjL as well as the signal output y ₂ den; Vert I, i.e. the system remains blocked. If the feed is to be initiated, the control lever to turn the feeder on and off is manually moved to the feeder on position. Now the sheets are fed from the feeder via the feed table to the system of the printing machine. If at the time of measurement M a sheet is properly at the positioning marks, the signals x ^, ^ g »XjU» Xjßg s ° ^w 3- ^e Y _{2 lead to} ^the '? Location 0, that is, the system is enabled and the sheet can be accessed by the Vibrating system of the printing machine are fed. The bridging clock signal Xy takes after the measurement time the "Vert O" (JiIg. 2-) "ie the signal output y _g continues to carry the y / er t and the system remains enabled.

If the bridging clock signal Xy changes from "Vert" 0 "to the value" L ", the signal output yg also has the value ¹¹ O ¹ , since the one input of the AND element 9 to which the bridging clock signal xy is fed through the AND operation of the amplifier output signals with subsequent double negation leads to the value ¹ VO "'.

109852/0058 _{BAD 0RIGINAt}

If the first - "or crooked" arrives at the positioning markers after the feeder has been set up, only one amplifier output leads to "L ¹ V, the other the value ¹¹ O",

The amplifier output signals 'xL · & it dem, Yert L and x ^ g with the i' / ert 0 are fed once to the OR element 5, as a result of the OR link between the two% signals, the output y ₂ carries the y / ert L, ie the system remains blocked. Furthermore, the amplifier output signals x ^ and x ^ a crooked arc control device, consisting of a. Antivalence circuit 10 and a subsequent AND element 11, whose second input

gang X _{1 leads} to »Vert L, ie feeder control lever up - down in position feeder up, fed.

If there are now 10 ^ signals with unequal values on the non-equivalence circuit, the output of the non-equivalence circuit and thus the 1st input of the Und element 11 leads to the "Vert L. As a result of the fulfilled AND condition, the output signal of the Und element 11 and leads so that the output V _{1 has} the value I »via the OR element 12, ie the feeder is switched off and the further sheet feed to the machine is thus interrupted,

In the case of a faulty bow system, the amplifier outputs XjjL and χΛ ₂ carry the value L, the signal x £ ₂ is fed directly to the And-Güed 13 »Furthermore, the output signals X ^ ₁ and χΛ _{2 are} linked in an Ünd element 6 and then in a Nioht - Member 7 is negated and fed via a delay element 14 to the 2nd input of the ünd element 13 as a signal with the value O. Because of the delayed transmission of the signal with the value 0 at the second input of the And-Güedes 13, there is still a signal with the value L from the previous switching state OK sheet

Λ09852 / 0058 -7-

BATH ORIGINAL

or inclined curve, since the second input of the ünd element 13 also carries a signal with the, Vert L, the output 3T ₁ via the OR element 12 is supplied with a signal with the .7ert L before the investor is turned off and thus the further sheet feed to the machine is interrupted. At the same time, the signal with the Jert L is fed from the OR element 12 via the OR element 5 to the output y ₂ , output y ₂ therefore also carries a signal with the // ert L, ie the system is blocked. The delay element 14 must be set so that the time delay is at least eo large that the investor can be turned off in this.

The circuit sanction can be briefly explained using the table in FIG. In the case of crooked arch system columns S ₁ and S ₂ , one amplifier output (xjJL or X ^ ₂ ) carries a signal with the .Vert L, the other a signal with the .Vert O, thereby turning off the feeder and locking the system.

In case of failure sheet feeder column F cause the amplifier outputs X ₁ J ₁₁ and ₁₂ XJJ a signal of, Vert I, which the investor is turned off and locked the system.

If the sheet is straight at the positioning marks, the amplifier outputs X ₁ I ₁ and XjJ ₁₂ carry a signal with the V / ert O, which means that

the system is activated and the investor remains in puncture.

109852/0058

Claims (1)

Claim: Circuit arrangement for automatic generator control on printing machines with two measuring elements, which have a clock-controlled amplifier and a missing sheet control device are assigned, characterized in that each Hess organ is assigned a clock-controlled amplifier (1; 2) whose outputs are next to the missing sheet control device a crooked arc control device (10; 11), consisting of a non-equivalence circuit (TO) and a downstream And-Giied (11), desaen second input coupled is with one on the control lever for feeder and -shut-off arranged contact emitting a signal x *, is downstream, the output of which is via a first OR element. (12) to the feeder shutdown (y ..) and via a second OR element (5), which is connected downstream of the first OR element (12), leads to the system blocking (y ^). 109852/0058