JP4669271B2 - Operation method and control device of rotary printing press - Google Patents

Description

The present invention proposes a printing operation and control method for a printing unit in a newspaper rotary printing press.

There are various types of arrangements of various units installed in the newspaper rotary press. Generally, as illustrated in FIG. 4, as a main component unit, a sheet feeding device 1, an infeed device 2, and a printing unit 3. , A web pass device 4, a folding device 5, a paper discharge device 6, and the like.
One part of the paper feeding device is configured such that a web 8 as a roll sheet is mounted on a reel stand 7 and the web 9 is continuously supplied corresponding to the consumption speed associated with printing.
The infeed device unit 2 applies a predetermined tension to the web 9 from the paper feeding device 1 and supplies the web 9 to the downstream printing unit 3.

The printing unit 3 is arranged on both sides of the web 9 so that the printing apparatus 10 is placed opposite to the web 9 and printing is performed on both the front and back sides of the web 9. Although there are various types of printing units 3, a standard two-color unit 3a and a color printing four-color unit 3b, which is also called a tower unit, are shown.
A plurality of sets of printing units 3 are arranged in a line on the same floor in one newspaper rotary press, and the webs 9 printed by each printing unit 3 are appropriately rearranged via the web pass device 4, It is made to merge, and it is made to carry in in the downstream folding machine 5 in the piled-up state. The web pass device 4 functions appropriately to control the running phase of each web 9 that has finished printing and to feed each web 9 to the folding machine 5 at a predetermined timing.
The folding machine 5 receives the web 9 that has been printed in the printing apparatus unit 3, performs various processes such as cutting and folding at a predetermined position, forms the folded book 11, and then passes the web 11 through the paper discharge apparatus 6. It is configured to be carried outside.

In FIG. 4, in order to correspond to various printing specifications such as inserting a color surface on an arbitrary page, for example, the color printing four-color unit 3b1 and the front web side of the folding machine 5 and the end of the rotary press arrangement 3b2 is arranged. Note that the paper feeding device 1 that supplies the web 9 in this example is disposed in the lower floor below the floor surface 1FL, and supplies the web 9 to the corresponding printing unit 3.

The printing press of the newspaper press is started by first passing the web for all printing devices to the folding machine in advance, installing all the printing plates, raising the speed, and bringing the printing cylinder into operation contact (cylinder). The print screen is transferred to the web, and the signature printed as a product is taken out. On the other hand, at the end of printing, the printing cylinder decelerates from the steady printing speed, and the printing cylinder is released and isolated (cylindered) and stopped at a low speed that is an unstable area of printing quality.
In other words, the timing for removing the cylinder is set to be performed simultaneously in all the printing units.

JP-A-11-165405

By the way, since ordinary newspapers perform multi-page printing, the number of printing units 3 operated at the same time is as many as 3 to 6 sets, and the total length of the printing press is very long. Also, depending on the color surface specifications, the web 9 of four colors is often run along a so-called bay window route that is once released to the machine side. As a result, the web runs to the folding machine 5 assembled after printing by each printing unit 3. The path length becomes very long, and the difference in transport length between the webs becomes large.
For this reason, as shown in FIG. 5, out of the waste paper that does not become a product generated in each printing unit at the start of printing, the so-called black loss occurrence start position where the ink is transferred and printed is transferred between the webs. This occurs as a general variation. In the folded book 11 in which each web is overlaid, the printed book that is printed even at a part thereof is regarded as a black loss, so the number of defective black loss folded books increases. Even at the end of printing, the same variation occurs at the position where transfer printing at the time of drum removal ends, and similarly, the number of defective black loss signatures increases.
That is, at the start of printing in FIG. 5, the black loss of the web 9 from the printing unit 3b2 farthest from the folding machine 5 is completed from the black loss starting point of the web 9 sent from the printing unit 3a3 close to the folding machine 5. The origami in the range up to is the waste paper considered as black loss. Similarly, when the printing is stopped, a folded sheet in a range from the printing stop point of the web 9 sent out from 3a3 to the printing stop point of the web 9 from 3b2 becomes a waste paper that is regarded as a black loss.

Therefore, when printing a complicated newspaper with many color pages, the paper 11 discharged from the folding machine 5 is a defect including a so-called black-out loss in which printing paper is mixed with unprinted white paper. A large amount of black loss occurs.
In addition, in order to survive the severe economic situation in recent years, in addition to creating attractive printing according to each region, it has been required to increase the operating efficiency of the printing press, the so-called operation rate. Furthermore, the frequency of print start-up and stoppage accompanying the change of the print pattern such as special printing is increasing, and the above-mentioned defective waste paper is generated each time, resulting in an increase in expenses that greatly affect the printing business. .
These issues have become apparent.

The present invention proposes to solve these problems, and a plurality of printing units arranged in parallel to perform printing on a web and the web printed by the printing unit are carried in, and the web is processed. A newspaper rotary printing press comprising a folding machine for performing printing, and a newspaper rotary printing press control device for controlling the timing of cylinder loading of the printing cylinders of the plurality of printing units at the start of printing for each printing unit. The control device is characterized in that, at the start of printing, the plurality of printing units are controlled so as to be sequentially inserted from a printing unit having a long web travel path length to the folding machine.
In addition, the control device, based on the difference in the travel path length of each printing unit relative to the longest travel path length of the printing unit having the longest travel path length of the web to the folding machine, and the printing speed of the newspaper rotary printing press, The cylinder unit timing time of the printing unit is calculated, and the cylinder unit of the plurality of printing units is performed after the cylinder unit timing time from the cylinder unit of the printing unit having the longest travel path length of the web to the folding machine. preferable.
Further, the control device increases the printing speed of the newspaper rotary press to a printing speed Vb at a constant acceleration, and the web travel path length to the folding machine is the longest when the printing speed is increased to the printing speed Vb. The cylinders are sequentially fed from a long printing unit, and the printing speed is increased to the normal printing speed Vp. The printing is controlled at the normal printing speed Vp, and the web travel path length to the folding machine is the longest. The printing speed Va at the time of cylinder insertion, the printing speed Vb, and the folding machine until the printing speed Vb is reached after the printing unit having the longest travel path length of the web to the folding machine is reached. The web travel distance Lab of the printing unit with the longest web travel path length, the travel path length of the printing unit with the longest web travel path length to the folding machine, and the web travel path to the folding machine The longest is The printing speed Vb from the difference L1n between the travel path lengths of the printing units that sequentially perform the cylinder insertion after the cylinders of the long printing unit and the cylinders of the printing unit with the longest travel path length of the web to the folding machine. Time Tab required to reach the folding machine, and the printing unit having the longest web travel path length to the folding machine since the printing unit having the longest web traveling path length to the folding machine It is preferable that the cylinder insertion timing time Tan until the cylinder insertion of the plurality of printing units which are sequentially subjected to the cylinder insertion is in a relationship represented by the following formula.
(Vb−Va) / Tab = k1
When L1n <Lab (Va + k1 · Tan / 2) Tan = L1n
When L1n> Lab Lab + (Tan−Tab) Vb = L1n
Moreover, it is preferable that the said control apparatus presets the said cylinder insertion timing time of these printing units according to the said travel path length of the said web.
The present invention also provides newspaper rotary printing comprising a plurality of juxtaposed printing units that perform printing on a web, and a folding machine that carries the web printed by the printing unit and processes the web. A newspaper rotary printing press control device that controls the timing of cylinder removal of the printing cylinders of the plurality of printing units to be performed when printing is completed. When the process is completed, the plurality of printing units are controlled so that the cylinders are sequentially removed from the printing units having a long web travel path length to the folding machine.
In addition, the control device, based on the difference in the travel path length of each printing unit relative to the longest travel path length of the printing unit having the longest travel path length of the web to the folding machine, and the printing speed of the newspaper rotary printing press, Calculate the cylinder unit timing of the printing unit, and remove the cylinders of the plurality of printing units from the cylinder unit of the printing unit having the longest travel path length of the web to the folding machine after the cylinder timing. Preferably it is done.
Further, the control device performs printing on the newspaper rotary printing machine at a regular printing speed Vp, decelerates the regular printing speed Vp at a constant deceleration, stops the printing machine, and at the time of deceleration, the folding machine The printing unit with the longest travel path length of the web is controlled so that the cylinders are sequentially removed, the time Tde from the start of deceleration to the reference point that becomes the waste paper, and the printing at the reference time point that becomes the waste paper The speed Ve, the normal printing speed Vp, the printing speed Vf when the printing unit is unrolled to the longest web path length to the folding machine, and the longest web traveling path length to the folding machine The difference L1n between the travel path length of the printing unit and the travel path length of the printing unit in which the cylinder is sequentially unrolled after the printing unit has the longest travel path length of the web to the folding machine, and the folding machine The web travel length of The cylinder boring from when the printing unit is unrolled to when the plurality of printing units are unrolled sequentially after the printing unit is unrolled after the longest running path of the web to the folding machine. It is preferable that the timing time Tfn is in a relationship represented by the following formula.
(Vp−Ve) / Tde = k2
(Vf−k2 · Tfn / 2) Tfn = L1n
Moreover, it is preferable that the said control apparatus presets the said drumming timing time of these printing units according to the said travel path length of the said web.

  The present invention also provides newspaper rotary printing comprising a plurality of juxtaposed printing units that perform printing on a web, and a folding machine that carries the web printed by the printing unit and processes the web. According to another aspect of the present invention, a plurality of printing units are sequentially placed from a printing unit having a long web travel path length to the folding machine at the start of printing.
  In addition, from the difference in the travel path length of each printing unit with respect to the longest travel path length of the printing unit having the longest web travel path length to the folding machine and the printing speed of the newspaper rotary printing press, It is preferable that the timing time is calculated and the cylinders of the plurality of printing units are placed after the cylinder insertion timing time from the cylinder of the printing unit having the longest travel path length of the web to the folding machine.
  Further, the newspaper rotary printing press is accelerated to a printing speed Vb at a constant acceleration, and sequentially from the printing unit having the longest web travel path length to the folding machine when the printing speed is increased to the printing speed Vb. Performing cylinder transfer, increasing the printing speed to the normal printing speed Vp, performing printing at the normal printing speed Vp, and printing speed Va at the time of cylinder insertion of the printing unit having the longest travel path length of the web to the folding machine; The printing path Vb and the web travel path length to the folding machine are the longest until the printing speed Vb is reached after the printing unit is put into the cylinder where the web traveling path length to the folding machine is the longest. The travel distance Lab of the web of the printing unit, the travel path length of the printing unit with the longest travel path length of the web to the folding machine, and the longest travel path length of the web to the folding machine of the printing unit. Trunk The time required to reach the printing speed Vb from the time when the printing unit with the longest travel path length of the web up to the folding machine L1n is compared with the travel path length of the printing unit that sequentially performs cylinder feeding after that. The cylinder is sequentially fed from when the printing unit having the longest travel path length of the web to Tab and the folding machine is placed after the printing unit having the longest travel path length of the web to the folding machine. It is preferable that the cylinder insertion timing time Tan until the cylinders of the plurality of printing units are in a relationship represented by the following expression.
  (Vb−Va) / Tab = k1
  When L1n <Lab (Va + k1 · Tan / 2) Tan = L1n
  When L1n> Lab Lab + (Tan−Tab) Vb = L1n
  Further, it is preferable that the cylinder setting timing times of the plurality of printing units are preset according to the travel path length of the web.
  The present invention also provides newspaper rotary printing comprising a plurality of juxtaposed printing units that perform printing on a web, and a folding machine that carries the web printed by the printing unit and processes the web. According to another aspect of the present invention, when printing is completed, the plurality of printing units are sequentially removed from a printing unit having a long web travel path length to the folding machine.
  Further, based on the difference in the travel path length of each printing unit with respect to the longest travel path length of the printing unit having the longest web travel path length to the folding machine and the printing speed of the newspaper rotary printing machine, It is preferable that the timing time is calculated and the cylinders of the plurality of printing units are removed after the cylinder removal timing time from the cylinder of the printing unit having the longest travel path length of the web to the folding machine.
  The newspaper rotary printing machine performs printing at the normal printing speed Vp, decelerates at a constant deceleration from the normal printing speed Vp, stops the printing machine, and runs the web to the folding machine during the deceleration. From the printing unit with the longest path length, the cylinders are sequentially pulled out, the time Tde from the start of deceleration to the reference time point that becomes the waste paper, the printing speed Ve at the reference time point that becomes the waste paper, and the regular printing speed Vp And the printing speed Vf when the printing unit has the longest web travel path length to the folding machine, and the travel path length of the printing unit with the longest web travel path length to the printing folder. The difference L1n between the travel path length of the printing unit that sequentially performs cylinder stripping after cylinder stripping of the printing unit having the longest web travel path length to the folder and the web travel path length to the folder is the longest. Long of the printing unit The cylinder-cutting timing time Tfn from the time of punching to the time of cylinder-cutting of the plurality of printing units in which the cylinders are sequentially drummed after the cylinder of the printing unit having the longest travel path length of the web to the folding machine is expressed by the following equation: It is preferable that it is the relationship shown by these.
  (Vp−Ve) / Tde = k2
  (Vf−k2 · Tfn / 2) Tfn = L1n
  In addition, it is preferable that the drumming timing times of the plurality of printing units are preset according to the travel path length of the web.

According to the newspaper rotary press according to the present invention, the number of defective black loss black loss signatures having a low resource value is greatly reduced because it is necessary to remove ink at the time of recycling, which occurs at the start and end of printing. The total amount of waste paper has also decreased, and it has become possible to obtain effects such as drastic improvements in printing material expenses and business expenses. Further, since it can cope with various forms of printing operation, the operation rate of the printing press can be increased, and efficient printing operation can be performed at low cost.

As shown in FIG. 1, the operation control method of the first embodiment of the present invention is configured so that the timing of cylinder insertion or cylinder removal of the printing unit 3 can be set independently for each printing unit 3.
In addition, the present apparatus is configured to calculate or automatically select and preset the cylinder insertion or cylinder removal timing based on the building route and the traveling route pattern of the web 9 associated therewith.
In FIG. 1, 15 is a control device, and 14 is a body attaching / detaching means.

By the way, the printing pattern of the newspaper press is normally controlled in the example shown in FIG.
In FIG. 3, the vertical axis indicates the printing (machine) speed, and the horizontal axis indicates time (t). The web sheet tension, the amount of dampening water, the ink transfer supply amount, and the like during printing operation vary depending on the printing speed, but are adjusted to the most ideal values at the normal printing speed (Vp).
At the start of printing, the printing press is driven at a low speed (Vi) when the web is passed to each printing unit or each printing plate is attached or detached.
When all the printing preparations are completed, the printing press is started, and the speed is once increased to (Vb), and the print quality and the like are checked at this speed.
After determining “OK” that the product can be carried out, the printing speed is increased to the normal printing speed (Vp) while checking the printing quality, and then printing is performed at a constant speed.
When the predetermined number of copies is near, the remaining number is taken into consideration and the deceleration is started at (td) and the printing press is stopped.

Normally, at the time of acceleration in FIG. 3, the cylinders are sequentially inserted from the printing unit of the longest route after (ta) at the timing (tn), and the cylinder removal is similarly performed from (tf) to (tg) at the time of deceleration from the printing unit of the longest route. Between.
Therefore, in the speed diagram, only the signatures printed between (tc) and (te) can be shipped as products. In other words, the signature between (ta) and (tc) after speeding up cylinder insertion and between (te) and (tg) before start of deceleration cylinder removal is black including the printing paper onto which the ink has been transferred. Loss. Although the cylinder unloading at the time of deceleration starts after (tf), the printing state tends to become unstable in the low speed region at the time of deceleration, and the print quality is deteriorated and it is difficult to produce a product. Therefore, the origami after the start of the barrel removal (te) is used as waste paper.

At the start of printing, the web 9 up to the folding machine 5 is sequentially transferred from the printing unit 3 having a long travel path length, and when predetermined printing is completed, the cylinder 9 is sequentially serialized from the printing unit 3 having a long travel path length. I do. In detail,
For example, each printing unit is placed at a timing after Tan from (ta) to L1n shorter than the longest travel path length (pass) L1. (Ta) Travel distance between (tb) = Lab, (Vb−Va) / Tab = k1,
When L1n <Lab (Va + k1 · Tan / 2) Tan = L1n (1)
When L1n> Lab Lab + (Tan−Tab) Vb = L1n (2)
The barrel removal at the time of deceleration is performed at a timing after Tfn from (tf). If (Vp−Ve) / Tde = k2,
(Vf−k2 · Tfn / 2) Tfn = L1n (3)
By the above formulas (1) to (3), the Tan or Tfn of the pattern that changes according to the web travel route or the building page constituting the newspaper is calculated or preset via the control device 15, and the timing of intrusion As shown in FIG. 2, the black loss occurrence start and end positions in each unit approximately coincide with each other as shown in FIG. 2, and the number of black loss portions in the overlapped book 11 can be greatly reduced. .

1 is a newspaper rotary press and an operation (control) configuration diagram according to the present invention.

Explanatory drawing of the operating method of a newspaper rotary press and a function (an effect | action, an effect) which concern on this invention.

Explanatory drawing which shows the driving speed change of the printing apparatus part which concerns on this invention.

The front view which shows the structure of a general newspaper rotary printing press.

Explanatory drawing of the operation method of a conventional newspaper rotary press, and a function (an effect | action, an effect).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Paper feeder 2 Infeed apparatus 3 Printing unit 3a 2 color printing unit 3b Color printing 4 color printing unit (tower unit)
4 Web Pass Device 5 Folding Machine 6 Paper Discharge Device 7 Reel Stand 8 Wrapping Paper (Rolled Sheet)
9 Web 10 Printing device 11 Origami 12 Plate cylinder 13 Printing plate 14 Cylinder attachment / detachment means 15 Control device

Claims (16)

A newspaper rotary printing press comprising a plurality of juxtaposed printing units that perform printing on a web, and a folding machine that carries in the web that has been printed by the printing unit and that processes the web,
A control unit for a newspaper rotary printing press that controls the timing of cylinder transfer of the printing cylinders of the plurality of printing units performed at the start of printing for each printing unit;
The control device performs control so that the cylinders of the plurality of printing units are sequentially started from a printing unit having a long web travel path length to the folding machine at the start of printing.
A newspaper rotary printing press characterized by that.   The control device is configured to calculate each printing unit based on the difference in the traveling path length of each printing unit with respect to the longest traveling path length of the printing unit having the longest traveling path length of the web to the folding machine and the printing speed of the newspaper rotary printing press. To calculate the time to put in
  The plurality of printing units are encased after the encasing timing time from the encasing of the printing unit having the longest travel path length of the web to the folding machine.
The newspaper rotary printing press according to claim 1, wherein:   The control device controls the newspaper rotary printing machine,
  The print speed is increased at a constant acceleration to the print speed Vb,
  When the printing speed is increased to the printing speed Vb, the cylinder is sequentially fed from the printing unit having the longest travel path length of the web to the folding machine,
  Increase to normal printing speed Vp,
  Control to perform printing at the regular printing speed Vp;
  The printing speed Va when the printing unit has the longest travel path length of the web to the folding machine;
  The printing speed Vb;
  The web travel of the printing unit having the longest web travel path length to the folding machine after the printing unit having the longest web travel path length to the folding machine is reached after reaching the printing speed Vb. Distance Lab,
  A printing unit that has the longest travel path length of the web to the folding machine, and a printing unit that sequentially performs cylinder feeding after the printing unit has the longest travel path length of the web to the folding machine. The difference L1n from the travel path length;
  The time Tab required to reach the printing speed Vb from when the printing unit with the longest travel path length of the web to the folding machine is reached;
  The plurality of cylinders that are sequentially encased after encasing the printing unit having the longest web travel path length to the folding machine from when the printing unit has the longest web travel path length to the folding machine. There is a relationship expressed by the following formula with the cylinder insertion timing time Tan until the cylinder of the printing unit is inserted.
The newspaper rotary printing press according to claim 1 or 2, characterized in that.
  (Vb−Va) / Tab = k1
  When L1n <Lab (Va + k1 · Tan / 2) Tan = L1n
  When L1n> Lab Lab + (Tan−Tab) Vb = L1n   The control device presets the cylinder setting timing times of the plurality of printing units according to the travel path length of the web.
The newspaper rotary printing press according to claim 2 or claim 3, wherein A newspaper rotary printing press comprising a plurality of juxtaposed printing units that perform printing on a web, and a folding machine that carries in the web that has been printed by the printing unit and that processes the web,
A control unit for a newspaper rotary printing machine that controls the timing of cylinder unrolling of the printing cylinders of the plurality of printing units when printing is completed ;
When the printing is completed, the control device controls the plurality of printing units to be sequentially removed from the printing units having a long web travel path length to the folding machine.
A newspaper rotary printing press characterized by that.   The control device is configured to calculate each printing unit based on the difference in the traveling path length of each printing unit with respect to the longest traveling path length of the printing unit having the longest traveling path length of the web to the folding machine and the printing speed of the newspaper rotary printing press. Calculate the drumming timing time for
  The cylinders of the plurality of printing units are removed from the cylinder of the printing unit having the longest travel path length of the web to the folding machine after the drumming timing time.
The newspaper rotary printing press according to claim 5, wherein:   The control device controls the newspaper rotary printing machine,
  Print at the normal printing speed Vp,
  Decelerate at a constant deceleration from the regular printing speed Vp and stop the printing press,
  At the time of the deceleration, control is performed so that the cylinder is sequentially removed from the printing unit having the longest travel path length of the web to the folding machine,
  The time Tde from the start of deceleration to the reference point that becomes a waste paper,
  The printing speed Ve at the reference time point that becomes the waste paper,
  The regular printing speed Vp;
  A printing speed Vf at the time of cylinder unrolling of the printing unit having the longest travel path length of the web to the folding machine;
  A printing unit that has the longest travel path length of the web to the folding machine, and a cylinder that sequentially performs cylinder stripping after the printing unit has the longest travel path length of the web to the folding machine. The difference L1n from the travel path length;
  The plurality of cylinders that are sequentially cylinder-punched after the printing unit that has the longest travel path length of the web to the folder after the cylinder is unrolled from the printing unit that has the longest travel path length of the web to the folding machine. The drumming timing time Tfn until the drumming of the printing unit is in a relationship represented by the following formula.
The newspaper rotary printing press according to claim 5 or 6, characterized by the above.
  (Vp−Ve) / Tde = k2
  (Vf−k2 · Tfn / 2) Tfn = L1n   The control device presets the cylinder removal timing times of the plurality of printing units according to the travel path length of the web.
The newspaper rotary printing press according to claim 6 or 7, characterized by the above. A control method of a newspaper rotary printing press comprising a plurality of printing units arranged side by side for printing on a web, and a folding machine for carrying in the processing of the web by carrying the web printed by the printing unit. And
At the start of printing, the plurality of printing units are sequentially encased in order from a printing unit having a long web travel path length to the folding machine.
A method for controlling a newspaper rotary printing press.   From the difference in the travel path length of each printing unit with respect to the longest travel path length of the printing unit having the longest travel path length of the web up to the folding machine, and the printing speed of the newspaper rotary printing press, the cylinder setting time of each printing unit To calculate
  The plurality of printing units are encased after the encasing timing time from the encasing of the printing unit having the longest travel path length of the web to the folding machine.
The method for controlling a newspaper rotary printing press according to claim 9.   The newspaper rotary printing press is increased to a printing speed Vb at a constant acceleration.
  When the printing speed is increased to the printing speed Vb, the cylinder is sequentially fed from the printing unit having the longest travel path length of the web to the folding machine,
  Increase to normal printing speed Vp,
  Printing at the regular printing speed Vp,
  A printing speed Va when the printing unit having the longest travel path length of the web to the folding machine is set;
  The printing speed Vb;
  The web of the printing unit having the longest web travel path length to the folder until the printing speed Vb is reached after the printing unit having the longest web travel path length to the folding machine is reached. Mileage Lab,
  A printing unit that has the longest travel path length of the web to the folding machine, and a printing unit that sequentially performs cylinder feeding after the printing unit has the longest travel path length of the web to the folding machine. The difference L1n from the travel path length;
  The time Tab required to reach the printing speed Vb from when the printing unit with the longest travel path length of the web to the folding machine is reached;
  The plurality of cylinders that are sequentially encased after encasing the printing unit having the longest web travel path length to the folding machine from when the printing unit has the longest web travel path length to the folding machine. There is a relationship expressed by the following formula with the cylinder insertion timing time Tan until the cylinder of the printing unit is inserted.
The method of controlling a newspaper rotary printing press according to claim 10 or 11, wherein
  (Vb−Va) / Tab = k1
  When L1n <Lab (Va + k1 · Tan / 2) Tan = L1n
  When L1n> Lab Lab + (Tan−Tab) Vb = L1n   Preset the cylinder setting timing times of the plurality of printing units according to the travel path length of the web
The method of controlling a newspaper rotary printing press according to claim 10 or 11, wherein A control method of a newspaper rotary printing press comprising a plurality of printing units arranged side by side for printing on a web, and a folding machine for carrying in the processing of the web by carrying the web printed by the printing unit. And
When printing is completed, the plurality of printing units are sequentially unrolled from a printing unit having a long web travel path length to the folding machine.
A method for controlling a newspaper rotary printing press.   From the difference in the travel path length of each printing unit with respect to the longest travel path length of the printing unit having the longest travel path length of the web to the folding machine, and the printing speed of the newspaper rotary printing press, the drumming timing time of each printing unit To calculate
  The cylinders of the plurality of printing units are removed after the drumming timing time from the drumming of the printing unit having the longest travel path length of the web to the folding machine.
The method of controlling a newspaper rotary printing press according to claim 13.   The newspaper rotary printing machine performs printing at a normal printing speed Vp,
  Decelerate at a constant deceleration from the regular printing speed Vp and stop the printing press,
  At the time of the deceleration, the cylinder is sequentially removed from the printing unit having the longest travel path length of the web to the folding machine,
  The time Tde from the start of deceleration to the reference point that becomes a waste paper,
  The printing speed Ve at the reference time point that becomes the waste paper,
  The normal printing speed Vp;
  A printing speed Vf at the time of cylinder unrolling of the printing unit having the longest travel path length of the web to the folding machine;
  The printing unit has the longest travel path length of the web to the folding machine, and the printing unit sequentially performs the cylinder removal after the cylinder unit of the printing unit having the longest web travel path length to the folding machine. Difference L1n from the travel route length of
  The plurality of cylinders that are sequentially cylinder-punched after the printing unit that has the longest travel path length of the web to the folder after the cylinder is unrolled from the printing unit that has the longest travel path length of the web to the folding machine. The drumming timing time Tfn until the drumming of the printing unit is in a relationship represented by the following formula.
The method for controlling a newspaper rotary printing press according to claim 13 or 14, characterized in that:
  (Vp−Ve) / Tde = k2
  (Vf−k2 · Tfn / 2) Tfn = L1n   Preset the drumming timing times of the plurality of printing units according to the travel path length of the web
16. The control method for a newspaper rotary printing press according to claim 14 or 15, characterized in that:

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