WO1986001155A1

WO1986001155A1 - Method of and apparatus for controlling tension of webs in rotary press

Info

Publication number: WO1986001155A1
Application number: PCT/JP1985/000450
Authority: WO
Inventors: Toshio Taguchi; Mitsunao Miyake
Original assignee: Mitsubishi Jukogyo Kabushiki Kaisha
Priority date: 1984-08-13
Filing date: 1985-08-13
Publication date: 1986-02-27
Also published as: JPH049147B2; DE3590386C2; DE3590386T; JPS6147262A

Abstract

A method of controlling the tension of webs in a rotary press, in which the printing is done on the webs, which are fed from a plurality of paper feed units, by printing means provided correspondingly to the webs, to then laminate the webs, fold the webs with a triangular plate and send the resultant webs to a subsequent step, consisting of the steps of detecting at an outlet section of each printing means the tension of the relative web which is transferred from an inlet section thereof to the outlet section via the printing means, computing the predetermined tension of the web at the inlet section of the printing means on the basis of the value detected at the outlet section of the printing means, regulating the tension of the web at the inlet section of each printing means on the basis of the result of the computation, and thereby regulating the tension of each web before the triangular plate to a constant level; and an apparatus for practicing this method. The level of the tension imparted to all the webs is also regulated by a pressing means.

Description

Technical Field of Control of Web Tension in Web Printing Presses

The present invention relates to a method and an apparatus for controlling the tension of a web in a rotary printing press handling a plurality of webs.

Background art

In a rotary printing press, the web may be meandered if the tension is too low, and wrinkled and cut off if the tension is too high. The tension value of the tube must be adjusted within the proper range.

The outline of the tension control device of a conventional rotary printing press is described with reference to Fig. 4, where 1 is a plurality of reel stands, and each reel stand is the same. The web 2 attached to the stand 1 passes through the feed roller 11 and the dancer roller 10 to reach the stencil unit 3, and This is where the seal is imposed. Furthermore, it passes through the guide roller 4 and the intermediate drag roller 5 to reach the drag roller 6 installed above the triangular plate, where it is a triangular plate driver. After being held down by the roller 7 and sent to the triangular plate 8, it is conveyed to the nibbling roller 9, where it is cut and then cut. It is discharged outside. On the other hand, an appropriate load is applied to the dancer roller 10 at the entrance via the load device 12, and the triangular plate drag holding roller at the exit is provided. La 7 An appropriate pressing force is applied to the nibbling roller 9 via the pressing devices 13 and 14, respectively, and these load devices 1 2 By operating the pressing device 1 3 1 4, the tension of the web 2 is controlled.

In the rotary printing press shown in FIG. 4, the load control device 12 and the pressing devices 13 and 14 are operated by the tension control device of the _A- bub, and the dancer roller 10 and the triangle are controlled. The tension of each tube 2 is controlled via the drag retainer roller 7 and the bibbing roller 9, but all the ゥ systems in each printing unit 3 are controlled. The method for adjusting the tension of the pipe 2 to an appropriate tension is not known, and a skilled operator is required to carry out a load test 12 and a pressing device 13, based on the test. At present, 14 is operated manually. For this reason, automation is desired.

SUMMARY OF THE INVENTION The present invention has been made to satisfy the above-mentioned requirements, and has as its object the purpose of an improved rotary printing capable of automatically controlling the tension of each valve to an appropriate value. It is an object of the present invention to provide a method and a device for controlling the tension of a tube on a machine.

Disclosure of invention

In summary, the present invention for achieving the above object is to provide a method of outputting the tension of each of the tubes reaching the outlet from the entrance of the rotary printing press via each printing means. Detected at the mouth, the predetermined tension of the web at the entrance of each printing means is calculated based on the detected value obtained at that time, and based on the calculation result, the printing means of each printing means is calculated. A method and an apparatus for adjusting the tension of the tube at the entrance so as to constantly adjust the tension of each tube in front of the triangular plate. In addition, the magnitude of the tension applied to all the webs is adjusted by pressing means.

To elaborate further, the structure of the present invention to achieve such a purpose is as follows:

(I) The method of controlling the tension of the web of the rotary printing press according to the first invention is provided for each web sent from a plurality of paper feeding units. The printing is performed by the printing means thus obtained, and the above-described respective tubes are stacked, folded by a triangular plate, and sent to the next step.

The tension of each of the webs in front of the triangular plate is detected by a detecting means, and the printing of each of the webs necessary to make the detected values constant from the detected values is performed. The above-mentioned predetermined tension is calculated by calculation means, and the tension before imprinting of each of the webs is adjusted by tension adjustment means for each of the webs according to the above-mentioned performance value. You

(Iv) The method for controlling the tension of a web of a rotary printing press according to the second invention is the same as that of the first invention, except that the method further comprises a means for controlling the pressing force on the overlapped web. It is characterized in that a set pressing force is applied by pressing means.

(IE) The tension control device for the web of the rotary printing press according to the third invention corresponds to each web sent from a plurality of paper feed units. In a rotary printing press, the printing is performed by an installed printing means, and the above-described respective tubes are stacked, folded by a triangular plate, and sent to the next process.

The first detection for detecting the tension of each of the above-mentioned tubes before printing. Means, a second detecting means for detecting the tension of each web before the triangular plate, a tension adjusting means for adjusting the tension of each web before printing, and a second detecting means. A calculating means for exerting a predetermined tension before printing necessary for the detection signal value to become constant, a calculation output signal of the calculating means, and detection of the first detecting means by the detection signal; The signal is compared, and the control means controls the tension adjusting means so that the detected signal value becomes equal to the calculated signal value.

(IV) The tension control device for a web of a rotary printing press according to a fourth invention is the same as the third invention, wherein the tension control device further applies a pressing force to the overlapped web. And a pressing force control means for controlling a pressing force of the pressing means to a set value.

Since the present invention has the above configuration, the following effects are obtained.

The running of each web passing through the triangular plate of the rotary printing press is stable, and the folding is accurate. In addition, by adjusting the pressing force of the pressing means and adjusting the magnitude of the tension of all the tubes, it is possible to automatically set the pressing force appropriately in each part by appropriately setting the pressing force.ゥヱ The tension of the drive can be adjusted to the desired range.

Brief explanation of drawings

FIG. 1 is a system diagram showing an example of a method for controlling the tension of a web in a rotary printing press according to the present invention and a tension control device used for carrying out the device, and FIG. Action theory FIG. 3 is an explanatory diagram of the operation of the tension control device, and FIG. 4 is a system diagram showing a tension control device of a web in a conventional rotary printing press.

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described in detail with reference to the drawings.

First, the method of controlling the tension of the web in the rotary printing press of the present invention and the use of the device for performing the method are explained by the tension control device of the web in the rotary printing press shown in FIG. In other words, 1 is a plurality of reel stands, and each of the reel stands 1 mounted on the reel stand 1 is connected to an infeed roller 1. 1. The print unit 3 reaches the print unit 3 via the dancer 10 and is printed. Further, the guide roller 4 and the middle drag roller 5 are put through to reach the drag roller 6 provided above the triangular plate, where the triangular plate door is placed. It is held down by the lug holding roller 7 and sent to the triangle No. 8. After that, the sheet is transported to the nibbling roller 9 and then cut and discharged out of the machine. On the other hand, an appropriate load is applied to the dancer roller 10 at the inlet via the food-carrying device 12, and the triangle drag holder roller 7 at the outlet is applied. An appropriate pressing force is applied to the webbing roller 9 via the pressing devices 13 and 14, respectively. FIG. 1 shows a case where there are three reel stands 1, but the number is not limited to three. Further, 15 is a tension detecting device, 16 is a computing device, 17 and 18 are pressing force control devices, 19 is a load force control device, and intermediate drag rollers 5 and 3 are provided. A tension detector 15 detects the tension between the square 2 and the drag roller 6 with the tension detector 15, and a detection signal obtained at that time is detected by the tension detector 16. At the same time, the load signal of the dancer roller 10 is sent to the arithmetic unit 16, and the arithmetic unit 16 performs the operation described below from these signals. Calculate the manipulated variables for the loading device 12 and the pressing devices 13 and 14, and send the control signal obtained from the result to the load force control device 19 and the pressing force control devices 17 and 18. The load force of the load device 12 is adjusted via the food force control device 19, and the press force of the press force 13 and 14 is adjusted via the press force control devices 17 and 18. ing .

Next, the operation of the tension control device for the web in the rotary printing press will be described. First, the calculation in the arithmetic unit 16 will be described. The second, 3 figure 1 is Li Lumpur scan data down de ', 1 *, 1 in the case of good jar to 3 Go of ^m, vinegar © We blanking 2 in middle-de-la-grayed Russia over La 5 Li Tsu It shows the case when it does not work. The tension in front of the triangular plate 8 of web 2 from reel stand 1 'is now T ^ kg) The triangle of web 2 from reel stand 1 * Zhang force the T ₂ (kg), Li Lumpur is te emissions de 1 "or al of the running paper 2 of triangular plate 8 in front of the tension T ₃ (kg), or Li Lumpur is te emissions de 1 ' The tension of Web 2 before printing unit 3 is changed to To. I ikg) The tension before printing unit 3 of Web 2 from reel stand 1 'is changed to To. , ₂ (kg), the tension before the print unit 3 of the sleeve 2 from the reel stand 1 * is T0, ₃ (kg), and the middle drag roller 5 The coefficient of friction between The correction value of the pressing force of roller 7 and nibbling roller 9 is △ F (kg), and the overall elastic coefficient of tube 2 before print unit 3 is E. (Kg / ca), the overall elastic modulus of web 2 after injection 3 is E (kg / cm), and the width of web 2 is a (ca). Lumpur is te emissions de 1 ', 1 *, 1 "or these © E blanking before the second triangular plate 8 detected tension T,, T _2. sums T _3, setting a total value of their The deviation from the value 値 Τ is divided by the coefficient of friction to determine the magnitude of the pressing force correction value AF of the triangular 扳 drag holding roller 7 and the nimbling roller 9. that. tension T ₃ and each of the other © E of its Department of cormorant E Breakfast 2 ing and the reference in the primary physician (© we blanking 2 of Li Lumpur scan data down de 1 * pressurized et al. in the case of this) 2-Tension 2,, deviation from T ₂ (ー), (Τ ₂ Τ Τ ₃ ) is divided by the overall elastic modulus ウ of Web 2 after print unit 3, resulting in 10 ₃ ) ノ, (Τ ₂ -Τ ₃ ) calculate Ε The tension T ₀ , _t , Τ., ₂ before reel tub 3 of web 2 from reel stand 1 ′, 1 * and reel stand 1 * The tension of these probes 2 before the printing unit 3 (the reference tension) Τ., Deviation from ₃ (Tot-To-a.), (T., _z— T. , ₃ ) divided by the overall elastic modulus ゥ of ゥ 2 before the printing unit 3 Τ, (Τ.,, 1T o, ₃ ) / E o, (T 0,2— T o, 3) Εθ. Then, the difference between them is (、.,, — T., ₃ ) E. One (T, one- _third ) Ζ 、, (Τ 0> 2 丄) . 0, 3) Ζ Ε one (Τ ζ _-. Τ ₃₎ Bruno E and the set value sigma T and paired to

To calculate the tension before the print unit 3 of the web 2 from the reel stand 1 ', 1 * .1 "! ¹ ,,,, To, 2T o, ₃ are calculated, and the control target value To, i, To, z, To, _{3 obtained} by the arithmetic unit 16 is output from the arithmetic unit 16 to each of the dancers. -It is sent as a control signal to the food loading device 12 of the roller 10, the air pressure of the loading device 12 is controlled, and the lean stand 1 ', 1 *, 1 " force, each mark © E have the tension T of the front triangular plate 8 of the probe 2 T _2, T ₃ of Luo this onset bright if Re to say Ru is adjusted to a constant, that is also the preparative peripheral speed Do different also When the webs 2 that have passed through the shaving unit 3 are stacked and transported together by the drag rollers 6 and 7 in front of the triangular plate, when the webs 2 are transported all at once, Increase the tension of each tube 2 that takes the value of the lanora. 10 Ri by the and the child that to adjust the air pressure of, but Ru Oh is also of you to the same, you explain the principles of the point of this to the next concrete to. Now, the reference web 2 (in this case, the web 2 from the reel stand 1 ^w ) passed through the print unit 3 copies JS ¾ ¾r V0 (ca / s) and the other web 2 (in this case, the belt 2 from reel stand 1'1 *) through the stamping unit 3 at V0 (1 + oi) (ca / s), the speed of the drag roller on the triangular plate of all the tubes 2, the passing speed of 6 parts of the drag roller ¾r V ca / s), the mark of the reference tube 2 E. Distortion before unit 3. , ₃ and other marks on the web 2 2 The distortion in front of the nit 3 is e o.i, and the distortion on the triangle on the reference web 2 is 6 Assuming that the strain at the drag roller 6 on the triangular plate of s ₃ and the other tube 2 is S i, i = 1 and 2, the mass of the reference web is The law of conservation,

V (1-8 ₃ ) = ν ₀ (1-δ β) ①

According to the law of conservation of mass for each tube,

(1-ei) = Vo (l + ai) (1-eo, i) (2) Here, the passing speed of the three print units of the print unit 2 is the same as that of the ink unit 3. The peripheral speed V of the printing unit 3 through which the reference knob 2 passes because the peripheral speed varies from one printing unit 3 to the printing unit 3 because it is the same as the printing speed. V is the peripheral speed of the printing unit 3 that each of the other tubes 2 receives. (L + oT i). However, << i <<1. Also, in the drag roller 6 on the triangular plate, all the gears are pressed by the holding roller 7 and move in an integrated state. The two are common. From the above formulas (1) and (2),

1 ε i (1 + or i) (1-s o, i) 1 + a i-β o

^{1 - sa 1 ~~ & 0 »} 3 1 one ^¾ 0, 3

③ Since s 3 <<1, 0, 3 <1, ③ can be approximated to ④

1-+ e 1 + a ― ε + ε 0> 3 ④ Therefore, '').

oi = (eo, i-eo, 3)-(S i-sa) 張力 On the other hand, the tension T i before the triangular 扳 upper drag roller 6 of each ヱ 2 is given by the following equation. I will be told.

T ₄ = a E ei ⑥

Similarly, T ₃ = a E e ₃ ⑦

T 0 i 3 ^ 3 H 0 S o, 3 "⑧

T o, i = a E o ε o, i ⑨

Substituting formulas ⑤-into formula て

1 1

ai (T o, i — T o, ₃ ) — —— (T i one T ₃ )

a E o a E

⑩

That is, the equation shows that the variation of the peripheral speed of the printing unit 3 passing through each of the tubes 2 can be calculated from the tension value.

On the other hand, from the formula,

ε 0, I s ₀ , ₃ = β,-ε 3 + ot <Q>eo> z ― 8 o, 3 = ε 2 — e 3 + or ₂

Here, the total tension of Web 2 before Print Unit 3,

Three

∑ T o, i = a C = constant value ®

i = 1

When the condition of is given, を and ⑦ are substituted into ⑩, and

1 1

i = (T o, i — T o, a) — (a E ε _Α -a E ε ₃ ) a E oa E

1

= (T o, i one T ₀ , ₃ ) — (e _£ -e ₃ )

a E o ... (To, 0, 3 {(e ε z) +

E o

When i = 1,

1

(T-T) = a {(e,-fi ₃ ) + a!}

E o

When i = 2,

1

(T 0 »2 one T 0« 3 {(se 3) + «2}

E

From formula (T + T + T 0> 3) = a C From formula (3) above

1 / Eo 0-1 / Eo To., (E _t δ 3) + or 0 / Eo-1 / Eo To. ₂ a (ε zs 3) + a 1 1 1 T 0

®

And you have use the value of Of i was a total of Ki in ⑩ formula and follow, s _t

= ε 3 so that

What is necessary is just to set the tension before the printing unit 3 indicated by. As a result, the tension in front of the triangular plate 8 of all the grooves 2 becomes the same. At this point, the total value of the tension before the triangle 扳 8 is determined by the drag roller 6 on the triangular plate and the nibbling roller 9. It is equal to the applied friction force "F".

Three

∑ T i = μ F ®

i = 1 Here, F is the pressing force (kg) of the triangular plate drag holding roller 7 and the nibbling roller 9. Accordingly, the absolute value of the tension in front of the triangular plate 8 can be adjusted by changing the attachment force F.

Although the present invention has been described with reference to the embodiment, it is needless to say that the present invention is not limited to such an embodiment and departs from the spirit of the present invention. Various design modifications may be made to the extent that this is not the case.

Industrial applicability

As described above, the web tension control method and apparatus in the web offset printing press according to the present invention adjust the web tension in each part of the web offset printing press within an appropriate range. This is useful in cases where

It is particularly suitable where exact folding is required after each web sent from multiple locations has been printed.

Claims

The scope of the claims

1. Each of the webs sent from a plurality of paper feeding units is printed by a printing means provided in correspondence with each web, and the above-described webs are overlapped with each other to form a triangle. In a rotary printing press that folds the board and sends it to the next process,

The tension of each of the webs in front of the square plate is detected by a detection means, and the webs necessary for the detected values to be constant from the detected values are determined. A predetermined tension before stamping is calculated by a calculating means, and a tension before printing of each of the webs is respectively adjusted by a tension adjusting means according to the calculated value. A method for controlling the tension of the web of a rotary printing press.

2. that Re et sending multiple耠紙part or al Each © We blanking. Its Resolution Re corresponding to print Tsu by the set only et printing means, a triangular overlapping the respective © _Λ Bed In a rotary printing press that folds it on a plate and sends it to the next process,

The tension of each of the webs in front of the triangular plate is detected by a detecting means, and each of the webs necessary for the detected values to be constant from the detected values becomes constant. The predetermined tension before printing is calculated by a calculating means, and the tension before printing of each of the valves is adjusted by a tension adjusting means by the calculated value, respectively, and the overlapping is performed. A web tension control method for a rotary printing press, characterized by applying a pressing force set by the pressing force control means and the pressing means to the web thus obtained.

3. Each web sent from a plurality of paper feed units is printed by the printing means provided corresponding to each web, and In a rotary printing press, which stacks each loop, folds it with a triangular plate, and sends it to the next process,

First detecting means for detecting the tension of each of the webs before printing; second detecting means for detecting the tension of each of the X-beams before the triangular plate; and marking of each of the webs A tension adjusting means for adjusting the tension before the Si] and a predetermined tension before printing necessary for the detection signal value to become constant, based on a detection signal of the second detection means. Comparing the output signal of the calculating means with the detection signal of the first detecting means, and adjusting the tension adjusting means so that the detected signal value becomes equal to the calculated signal value. A tension control device for an A-shape of a rotary printing and shaving machine, characterized in that the tension control device comprises a controlling comb means for controlling.

4. Each of the webs sent from the plurality of paper feeding units is printed by a printing means provided in correspondence with each web, and the webs are overlapped with each other to form a triangular plate. In a rotary printing press that folds the paper and sends it to the next process,

First detecting means for detecting the tension of each of the webs before printing, second detecting means for detecting the tension of each of the webs before the triangular plate, and a mark on each of the webs A tension adjusting means for adjusting the tension before shaving; and a calculating means for calculating, based on a detection signal from the second detection means, a predetermined tension before printing necessary for the detection signal value to be constant. And comparing a calculation output signal of the calculation means with a detection signal of the first detection means, and controlling the tension adjusting means so that the detection signal value becomes equal to the calculation signal value. Control means and said overlapping A rotary printing press characterized by comprising a pressing means for applying a pressing tension to the obtained lever and a pressing force control means for controlling the pressing force of the pressing means to a set value. Web tension control.

5. The tension control device for a web of a rotary printing press according to claim 4, wherein said pressing means is provided in front of said triangular plate.

6. The tension control of a rotary printing press according to claim 4, wherein the pressing means are provided before and after the triangular plate, respectively. apparatus.