JP2004067378A - Rotary press - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten a long route length of a web and make fluctuation of tension small to prevent printing failure such as register deviation or overlapping. <P>SOLUTION: The rotary press 31 has a general printing unit 3a for printing a web 9, a color printing unit 3b capable of multiple color printing, and a folding machine 5 for folding the web 9 sent after printing of each of the units 3. The folding machine 5 and the general printing unit 3a are provided in parallel along the traveling direction of the web 9 as a unit row. A color printer unit 3b is provided on a floor surface 30 the same as the unit row, near the folding machine 5 on the downstream side of the unit row. A row part 14 of turn bars is provided for changing the traveling direction of the web 9 after printing by each of the units 3 at the upper side of the unit row to substantially a right angle direction. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an arrangement structure of printing units and the like arranged side by side in a rotary printing press including a newspaper rotary press.
[0002]
[Prior art]
A newspaper rotary press will be described as an example of a conventional rotary printing press.
There are various types of arrangement of the units provided in the newspaper rotary press. The A type shown in FIGS. 4A and 4B has various printing specifications in which the printing units 3 and the folder 5 are arranged in a line along the running direction of the web 9 and color pages or the like are provided at an arbitrary location. In order to cope with the above problem, the web path device 4 is provided with a turn bar row portion 14 and a color printing unit (hereinafter, also referred to as a tower unit) 3b1, for example, as shown in FIG. 3b2 and 3b3 are arranged. The paper feeding device 1 for supplying the web 9 to the printing unit 3a and the color printing unit 3b is provided at a lower floor lower than the floor 30.
[0003]
In the B type shown in FIGS. 5A and 5B, the sheet feeding device 1 for supplying the web 9 and the printing unit 3 are arranged on the same floor 30. In this type of rotary press, as shown in Japanese Utility Model Registration No. 2554062, a single-sided color printing unit 6 is arranged on the opposite side of the sheet feeding device 1 with a general printing unit 3a interposed therebetween. The unit 3a makes it possible to print the other one side of the color print on the web 9 after the one-side black print.
When the printing unit 3a is changed to a two-sided four-color printing unit and an attempt is made to support an arbitrary color surface, the positions of the two-sided four-color printing units 3b1 and 3b2 indicated by dashed lines are optimal for the same reason as in the A type.
[0004]
The webs 9 are printed by the corresponding printing units 3, conveyed, merged (assembled), formed into a signature, which is a product, by the folding machine 5, and delivered to the outside via a paper ejection device (not shown). You.
Since newspapers are printed simultaneously and in multiple pages, the number of printing units 3 is as large as 3 to 6 units, and the total length of the printing press may reach 30 m. Therefore, there is a great difference in the length of each web path (transport length) conveyed to the folder 5.
[Problems to be solved by the invention]
[0005]
The web tension T has the following relationship.
T = E × ε-R
(T: web tension E: Young's modulus = strain coefficient ε: strain rate R: running resistance)
In the two-sided four-color printing unit 3b, the Young's modulus E decreases because the dampening water increases. Furthermore, in the case of a long path length, the number of guide rollers increases, and the running resistance R increases. Therefore, since the web tension T is lower than that of other general printing units 3a, it is quite impossible to increase the distortion factor ε by operating the motor to improve it.
For example, in FIG. 4, in the drag roller facility at the entrance of the folding machine 5 for equally applying tension to each web 9, the web tension at the tower unit 3b, especially at the exit of the long path length 3b2 tends to be low. .
[0006]
Such a conventional rotary printing press has the following problems.
(1) The tension at the outlet of the tower unit 3b is generally low, and the Young's modulus E and the running resistance R in the above-described formula change depending on the operating speed and the state, causing the tension to fluctuate. In turn, this affects the rotation of the printing cylinder and the web 9 during printing, and causes printing defects such as misregistration and double filing.
(2) Since the tower unit 3b, which needs to perform more adjustments during printing operation than a normal printing unit, is far from the position of the folding machine 5, which is the main operation position of the operator, it takes time for management adjustment. Response to defects is also delayed.
[0007]
The present invention has been made in view of such circumstances, and has as its object to shorten the long path length of the web 9, reduce fluctuations in tension, and prevent printing defects such as misregistration and dubbing. It is in. Another object of the present invention is to install the tower unit 3b in the vicinity of the folding machine 5 to reduce the operator's management work and realize more reliable management work.
[0008]
[Means for Solving the Problems]
The present invention relates to a general printing unit for printing a web, a color printing unit capable of performing multicolor printing, and a rotary printing press having a folding machine for folding a web sent after printing in each unit. Is located on the same floor as a general printing unit and near the folding machine, and a turn bar row portion for changing the running direction of the web after printing in each unit is provided above the unit row.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a newspaper rotary press which is an example of a rotary printing press according to an embodiment of the present invention will be described with reference to the drawings. Parts and parts common to those of the conventional apparatus will be described with the same reference numerals.
[0010]
As shown in FIGS. 1 and 2, the newspaper rotary press 31 includes a sheet feeding device 1, an infeed device 2, a printing unit 3, a web path device 4, and a folder 5 disposed below the floor 30. It is configured. The printing unit 3 includes a general printing unit 3a (3a1 to 3a4) and a color printing unit 3b (3b1 to 3b4) capable of multicolor printing.
[0011]
The paper feeding device 1 is configured so that a paper roll 8 is mounted on a reel stand 7 and a web 9 is continuously supplied at a speed corresponding to printing. The infeed device unit 2 is provided between the sheet feeding device 1 and the printing device unit 3, and is configured to supply the web 9 to the printing unit 3 in a downstream process while applying a predetermined tension to the web 9.
[0012]
The printing unit 3 includes a printing device 10 (10a to 10d), a plate cylinder 12, and a printing plate 13, as shown in FIG. The printing devices 10a and 10b are provided to face each other with the running web 9 interposed therebetween, and are configured so that printing can be performed on the front and back of the web 9, respectively. Further, the printing devices 10c and 10d arranged side by side along the running direction of the web 9 appropriately change the ink colors to enable multicolor printing.
[0013]
A plurality of printing units 3 are arranged in a single rotary press along the running direction of the web 9. The webs 9 printed for each set are merged and overlapped by the web path device 4, and then carried into the downstream folding machine 5.
The web path device 4 is configured to appropriately control the transfer state such as the speed of the web 9 and send the web 9 to the folder 5 at a predetermined timing. Further, in order to correspond to various printing specifications such as setting a color surface on an arbitrary page, a turn bar row portion 14 is provided so that a traveling route of the web 9 can be changed.
The folding machine 5 is disposed downstream of the printing unit 3 and is configured to form the web 9 into a signature by processing such as cutting or folding at a predetermined position, and then to carry it out to the outside via a paper discharging device. I have.
[0014]
The color printing unit 3b is arranged near the folder 5 in a direction substantially perpendicular to the running direction of the web 9, so that the path of the web 9 is shortened. On the upper side of the printing unit 3, a turn bar row portion 14 is provided, and the running direction of the web 9 sent from the color printing unit 3b is changed to a substantially perpendicular direction, and the web 9 is sent from the general printing unit 3a. It is configured to be collected in the same direction as the web 9 to be formed.
Note that the vicinity of the folding machine 5 indicates a place adjacent to the folding machine 5, but even if they are not adjacent to each other, the folding of the web tension, which is the object of the present invention, can be reduced within a range where the fluctuation of the web tension can be reduced. It is assumed that it includes a position close to the machine 5. For example, it may be a place separated by one unit from the folder 5.
[0015]
The basic configuration and functions of the above series of rotary printing presses are the same as those of the related art. There are various types of driving methods for newspaper rotary presses. As shown in FIG. 3B, independent motors 11 are attached to each component unit, and after detecting relative timing, Is generally used.
[0016]
According to the rotary printing press according to the present invention, the color printing unit 3b is placed on the same floor 30 as the general printing unit 3a, and the side of the main line unit where the general printing unit 3a is juxtaposed. The following effects can be obtained because it is arranged near the machine 5.
(1) Since the difference in the length of the web route (traveling paper path) sent from each printing unit can be reduced, the web tension (tension) is prevented from lowering, and the variation in the web tension is reduced. In particular, fluctuations during acceleration and deceleration are reduced, color matching in multicolor printing is easy, and waste paper due to poor printing quality such as misregistration and double printing can be reduced.
(2) It is possible to easily cope with various printing specifications such as an arbitrary surface color, and also to reduce the number of times the turn bar passes through the turn bars, thereby reducing the running resistance.
(3) Since the tower unit 3b is arranged near the main operation position of the operator, operability and workability are improved. In addition, the time required for management adjustment and the like can be greatly reduced, and more reliable management adjustment work can be performed.
(4) Since the color printing unit 3b is arranged in the side space near the general printing unit 3a group, it is possible to carry out an extension work without adding a building, thereby reducing the construction cost.
(5) In this machine configuration in which the printing unit groups 3a and 3b are arranged near the folding machine, the drive system becomes complicated and the number of parts increases if a drive system using a line shaft is used. The use of a control drive system simplifies the drive system and reduces construction costs.
[0017]
【The invention's effect】
In the present invention, a rotary printing press having a general printing unit for printing a web, a color printing printing unit capable of multicolor printing, and a folding machine for folding the web sent after printing in each unit, comprising: Color printing in a direction substantially perpendicular to the running direction of the web, in the vicinity of a folding machine arranged downstream of a unit row in which general printing units are installed in parallel along the running direction of the web. The printing unit is disposed on the same floor as the unit row, and a turn bar row portion is provided at the top of the unit row to change the running direction of the printed web in each unit to a substantially right angle direction, so that a long path of the web is provided. By shortening the length, fluctuations in tension can be reduced, and printing defects such as misregistration and dubbing can be prevented. Further, by installing the color printing unit near the folding machine, it is possible to reduce the management work of the operator and realize more reliable management work.
[Brief description of the drawings]
FIG. 1 is a plan view of a newspaper rotary press according to an embodiment of the present invention, showing an arrangement of a printing unit and a folder.
FIG. 2 is a front view of FIG. 1 of the newspaper rotary press according to the embodiment of the present invention.
FIG. 3A is a basic configuration diagram of a newspaper rotary press according to an embodiment of the present invention, and FIG. 3B is a detailed explanatory diagram of a G section of FIG.
4A and 4B are diagrams showing a conventional newspaper rotary press (A type), wherein FIG. 4A is a plan view showing the arrangement of a printing unit and a folder, and FIG. 4B is a front view of FIG.
5A and 5B are diagrams showing a conventional rotary printing press (B type), wherein FIG. 5A is a plan view showing an arrangement of a printing unit and a folder, and FIG. 5B is a front view of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Paper feeder 2 Infeed device 3 Printing unit 3a General printing unit 3b Color printing unit (tower unit)
REFERENCE SIGNS LIST 4 web path device 5 folder 6 single-sided color printing unit 7 reel stand 8 web 9 web 10 printing device 11 single motor 12 plate cylinder 13 printing plate 14 turn bar row section 31 newspaper rotary press (rotary printing press)

Claims (1)

In a rotary printing press having a general printing unit for printing a web, a color printing unit capable of multicolor printing, and a web folding machine sent from each unit, a color printing unit is replaced with a general printing unit. A rotary printing press, which is disposed on the same floor as the above and in the vicinity of the folding machine, and provided above the unit row with a turn bar row section for changing the running direction of the web after printing in each unit.

Images