JPS6030342A - Belt type printing apparatus - Google Patents

Abstract

PURPOSE:To print a pattern with varied lengths easily without replacement of a plate cylinder by winding a belt-shaped printing plate free to set the printing dimensions between the plate cylinder and a tension roll with a suction hole to form an equipment. CONSTITUTION:A suction part 41 is formed between a suction partition 42 fixed on a support rod 43 and the inner wall of a tension roll 23 (numeral 45 indicates a suction hole) rotated sliding on the outside of the partition 42 and a printing plate 21 running along the tension roll 23 is sucked tightly on the roll 23 through a suction pipe 32, the suction part 41 and said suction hole 45. Then, an endless belt-shaped printing plate 21 (numeral 13 indicates printing material and 14 a pitch mark) with a specified printing dimensions is suspended with a plate cylinder 22 and the tension roll 23 rotating synchronizing each other to run in the direction of the arrow and prints a pattern of a specified printing dimensions continuously on a liner 1 made to run in the direction of the arrow with a press roll 2.

Description

[Detailed description of the invention] The present invention relates to a belt type printing device.

In particular, it relates to a continuous printing device that can change printing dimensions without changing the plate cylinder when printing patterns of different lengths.For example, when printing a pattern with a predetermined size on cardboard, - Since it was impossible to print on cardboard that had been formed on a machine and was running, it was common practice to run each cut cardboard sheet, which was to become a box blank, through a printing machine. Nine.

However, in this case, printing is done after step forming, so
The corrugations of the corrugated pole sheet were compressed by the printing pressure, reducing the compressive strength of the box made of the corrugated sheet. In particular, when performing multicolor printing, the corrugated paperboard sheets are pressed many times, making them fragile.

As mentioned above, in the case of a pattern with a predetermined size, such as a continuous pattern such as a wood grain pattern, the continuous limb pattern does not substantially have an end, so it will not look unnatural even if it is cut from any point. It is something.

Therefore, the continuous pattern as described above can be printed on the liner itself before step forming with a corrugator. Patent Application No. 1972-57285 (Special Publication No. 51-3
No. 0509) is a typical example.

However, this apparatus cannot be applied to a printed pattern having a predetermined dimension, especially a constant length in the running direction of the running web serving as the printing medium.

Recently, devices have been used that are capable of continuous printing by printing a pattern having a predetermined size and also printing marks for cutting. After printing the above pattern on the liner using this device, corrugated cardboard is formed using a corrugator, and after forming one corrugated cardboard, the cutting mark on the traveling cardboard is detected by an optical sensor, such as a phototransistor or a phototube, and the detection is obtained from a nuclear sensor. Methods and devices are already known in which the position at which the cardboard is to be cut is set by a signal, and the cardboard is cut without shifting the printed pattern to obtain a cardboard sheet having desired dimensions.

3 - However, in this type of printing device, the dimensions of the printed pattern, especially the dimensions in the running direction of the running web (hereinafter referred to as printing dimensions), are the same as the outer circumference of the plate cylinder of the printing device; Print dimensions cannot be changed unless the print size is replaced.

In other words, if it is desired to change the printing dimensions, the plate cylinder must be replaced.

However, the above-mentioned plate cylinder usually has a diameter of 10 mm, although it varies depending on the size.
It is extremely heavy, weighing between 0Kf and several 100 kg, and requires a large storage space, requiring one to two hours to replace it. Therefore, the printing apparatus must be stopped during that time, which greatly reduces work efficiency.

Therefore, it has drawbacks such as being unsuitable for handling small lots and receiving orders with early delivery dates.

Under these circumstances, there has been a demand for a printing device that can print patterns having various print sizes continuously on a running web, and that can also easily replace plates.

As a result of various studies, the present inventor found that when printing is applied to the liner before it becomes corrugated, the printed pattern does not have to be completely continuous, that is, the end of one printed pattern and the first printed pattern. We focused on the fact that it does not have to be completely continuous with the starting edge of In addition, in the case of the 7 Lexo printing method, the printing plate is mechanically attached to the plate cylinder, so printing is not performed at the attachment point. It was found that the 7-lexo printing method can also be applied to continuous printing as described above. Earlier, we also noted that in the flexographic printing method, the printing plates are removable and that different printing patterns with the same print size can be applied without replacing the plate cylinder.

As a result of further research on the above points, the inventors noticed that if the belt 6 set of printing plates was rotated while suctioning air, the printing plates would not shift, and this led to the completion of the present invention.

The objects of the present invention are listed below.

(1) To provide a printing device capable of substantially continuous printing by forming printing patterns with different print sizes in a belt shape without changing the plate cylinder.

(2) To facilitate the work of replacing printing plates.

(3) To provide a printing device that can be used with the same printing dimensions as the printing pattern and the printing plate.

(4) Other objects of the present invention will become clear from the detailed description of nine preferred embodiments illustrated below.

The gist of the present invention, which can quickly achieve the above object, is a printing device having a belt-shaped printing plate wound around a plate cylinder and a movable tension roller, and 6- Can be set to any size. A belt-like 1 printing plate and 1. This is a belt-type printing device characterized by having a tension roll trap and a suction hole drilled therein.

The present invention will be described below with reference to the drawings.

In FIG. 1, a printing plate 6 is formed by disposing a printing material 15 on a belt-like base material in a designed size on a printing cylinder 11, and a round tension roll 12 that is endless at a set pitch and setting the outer circumference of the printing plate 6. Then, the nuclear printing plate 6 is stretched and set so as to prevent printing errors. On the other hand, a printing ink supply device 3 is mounted on a companion printing plate 6 wound around the printing cylinder 11 and installed opposite to the printing cylinder 11. On the other hand, the liner to be printed is wound around the press roll 2, and the liner is connected to the plate cylinder shaft 4 in synchronization with the speed of the printing plate 6 to rotate the press roll 2 and feed out the liner. In addition, the plate cylinder 1 is used to rotate the tension roll 12 and the printing plate 6, which are fixed according to printing dimensions.
There are claws 9 on both sides of the printing plate 6, and there are feed holes 8 like those on movie film on both sides of the printing plate 6, and the claws 9 on both sides of the plate cylinder 11 engage the feed holes 8. , the printing plate 6 is sent out like the gears and chain of a bicycle. On the other hand, claws 9 are provided on both sides of the tension roll 12, which is fixed according to the printing dimensions, so that the tension roll shaft 5 and the printing plate are arranged so that the tension roll 12 accurately maintains a constant tension on the printing plate 6. The barrel drive shaft 4 rotates via a synchronized device (not shown). This printing device can easily remove the printing plate 6 on which the printing material 13 is set at a length that releases the lacing 7 without replacing the printing cylinder 11, and the length of the printing plate 6 is When the printing size changes, stable printing is always possible by moving the lever 12 according to the printing size.

However, the printing apparatus shown in FIG. 1 described above has a major drawback. When looking at the layout and printing dimensions, the desired pitch is not necessarily achieved. This is because when making the printing plate 6 endless by lacing the feed p holes 8 set on both sides of the printing plate 6, it is necessary to match the pitch of the feed p holes 8. If this is pasted onto a corrugated board 7-t using a corrugator, the corrugated board sheet cut at the pitch mark 14 will come out with all the required length cut.9. This loss also extends to the core base paper and back liner, and it was found that a large amount of loss occurred in printing plate 6.
is driven by the claw 9 set on the plate cylinder 11 and tension roll 12 of the printing device, so the width of the printing plate 6 is always the effective value of the plate cylinder 11 and tension roll 12 of the printing device, regardless of the printing width. It has also become clear that it will be a big loss if you are already controlled by the men.

In order to promptly solve the above-mentioned drawbacks of the example cited in FIG. 1, the present invention provides an apparatus according to the explanatory diagrams of FIGS. 3, 4, 5, and 6.

The present invention will be explained as follows with reference to FIGS. 3, 4, and 5.

A tension roll for setting the outer periphery of the printing plate 21 by placing the printing material 16 on a belt-like base material in a designed dimension on the printing plate 21, forming the printing plate 21, and making it endless with a lacing 7 to the set printing dimension. The printing plate 21 is pasted using a printing plate 23 having a built-in printing function and set so as to prevent printing errors.

FIG. 4 shows a rotatable and movable tension roll 25 (DLm diagram), in which numerous suction holes 45 are bored over almost the entire circumferential surface of the tension roll 10-23.

A suction partition wall 42 is provided inside the tension roll 23.
are arranged in a fixed manner, and a suction portion 41 is formed. Since the suction partition 42 is fixed to the support rod 43, it does not rotate even if the tension roll 25 rotates. A suction vibro 2 is disposed below the support rod 43. # The suction pipe 32 is connected to an external suction mechanism (not shown), and suctions the rotating printing plate 21 to the tension rule 23 through the suction hole 45, thereby separating the printing plate 21 and the tension rule 23. This prevents slips from occurring between the

A device 3 for supplying printing ink to the printing plate 21 wound around the plate cylinder 22 is installed relative to the plate cylinder 22. On the other hand, the liner to be printed is wound around a press roll 2, and the liner is connected to a drive shaft 29 to rotate the press roll 2 and send out a running web, e.g. .

Also, the tension scale 23 and the printing plate 2 are fixed according to the printing dimensions.
In order to rotate the printing plate 21, the tension roll 26 has a built-in suction part 41 and the printing plate 21 is moved to the tension roll 23.
Gears 35 are provided on both sides of the tension/puller 23, which is adsorbed onto the surface. A pinion gear 2 opposite to the gear 35
The transmission pulley 28 is attached to the shaft '51 which is set with 5.
is set, and a tie belt 33 is interposed with a pitch adjustment pulley 27, and gears 34 are provided on both sides of the plate cylinder 22. The gear 2 passes through the drive gear 24 opposite to the gear 34.
The transmission pulley 2 is attached to the drive shaft 29 where the transmission pulley 2 is set.
6 and drive the tie writing belt 33, the plate cylinder 22
The tension roll 26 is rotated in synchronism with the tension roll 26. In the case of the above-mentioned printing plate 210 rotation drive method, the pitch of the printing plate 21 does not need to consider the extra dimension due to the claws and feed holes etc. Since printing can be carried out using the printing dimensions of the plate 21, this method has the great effect of eliminating the extra dimension P seen in the conventional method and the above-mentioned conventional example.

Further, unlike the conventional method in which the printing plate 21 always uses the same width as the printing device assistant and the conventional example described above, the printing plate guide ring 50 shown in the explanatory diagram FIG. 5 is used to use an arbitrary width. ．．
51 on the plate cylinder 22 and tension roll 23, stable rotation of the printing plate 210 at the set position is ensured.

By improving the above mechanism, the printing dimensions of the printed pattern and the printing dimensions of the printing material can be made the same without impairing the objective of continuous printing and facilitation of the replacement work of printing plate members. It has also become clear that significant benefits can be obtained by making the size of the printing plates optional.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional belt-type printing device, FIG. 2 is a partially enlarged view of a printing plate used in the device, FIG. 3 is a perspective view showing one embodiment of the device of the present invention, and FIG. The figure is a sectional view of the tension roll, and FIG. 5 is a front view showing another embodiment of the apparatus of the present invention. In the figure, 1... Running web, 2... Press roll, 3
... Ink supply device, 4... Plate cylinder shaft, 5...
・Tension roll shaft, 6...Print plate, 7 races...
Racing, 8... feed hole, 9... claw, 10...
・Claw, 11... Plate cylinder, 12... Tension four wheel, 13... Stamp material, 14... Pitch mark, 21.
...Printing plate, 22...Plate cylinder, 2514-...Ten V Yonpole, 24...Pinion gear, 2
5... Pinion gear, 26... Transmission pulley, 2
7... Idler pulley, 28... Transmission pulley, 29... Drive shaft 7), 30... Idler,
51... Binionsha 7), 32... Suction pipe,
35...Tie belt, 64...Gear, 35.
...Gear, 41...Suxillon part, 42...Suction partition, 43...Support rod, 45...Suction hole, 50
．． 51...Print guide ring. Patent applicant Kyokuto Fatty Acid Co., Ltd. 15- Engraving of drawings (no change in content) Procedural amendment dated December C, 1982 2 Name of invention Bell I type printing device 3 Relationship with the person making the amendment case (Patent application Address: 2-2-9 Higashi-Shinbashi, Minato-ku, Tokyo, Koshida Shoko Building ) Amend the plan according to the attached amended drawings.

Claims (1)

[Scope of Claims] A printing device having a belt-like printing plate wound around a plate cylinder and a movable tension roll, which includes: ■ a front belt-like printing plate that can be set to any printing size; A belt-type printing device characterized by having a suction hole provided therein.