JP2002029024A - Replacing cylinder type rotary press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform both of reduced-kind and large-lot printing and multikind and small-lot printing. SOLUTION: As replacing cylinder apparatuses, replacing cylinder apparatuses 25a, 25b and 25c for continuous printing using printing cylinders having printing surfaces on the total peripheries thereof and replacing cylinder apparatuses 26a, 26b and 26c for intermittent printing using printing cylinders of which the parts in the circumferencial direction have a diameter made large than that of the other parts and which have printing surfaces on the peripheral surfaces of the large diameter parts are selectively used, and forward and rearward running means made possible to run and stop continuous paper 4 in a forward and rearward directions are provided on the downstream side of the send-out roll of a paper feed apparatus 6 and the upstream side of the draw-in roll 23 of a draw-in apparatus 20 and dancer roll 9 and 22 made fixable are provided between the send-out roll and the upstream forward and rearward running means and between the downstream forward and rearward running means and the draw-out roll.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exchange which can selectively perform both continuous printing of a pattern of a selected vertical length and intermittent printing in which the vertical length can be arbitrarily changed. The present invention relates to a rotary press.

[0002]

2. Description of the Related Art Conventionally, rotary presses in which the vertical length of a picture is variable include an exchangeable rotary press and an intermittent rotary press.

[0003]

In the case of an exchange cylinder type rotary press, the vertical length of the picture is determined by the circumferential pitch of the gears of the exchange cylinder unit. It is not possible to print a picture with a vertical length of millimeter size such as.

As the intermittent feed rotary press, those disclosed in Japanese Patent Application Laid-Open No. 58-55246 and Japanese Utility Model Application Laid-Open No. 2-133339 are known. In these rotary presses, the top and bottom lengths can be set arbitrarily, but since the continuous paper repeats forward, stop, and reverse, the production speed does not increase and it is not suitable for large lots.

[0005] As described above, when there is a demand for both continuous printing with the vertical length of the picture being variable and selective printing of the picture with an arbitrary vertical length, the conventional exchangeable cylinder type is conventionally used. It was necessary to prepare both a rotary press and an intermittent-feed rotary press, which was costly.

The present invention has been made in view of the above, and is intended to print at a low cost any of a small lot of a large variety and a small lot of a large variety, and to obtain the same at a low equipment cost. It is an object of the present invention to provide an exchangeable rotary press in the form of a cylinder.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, an exchange cylinder type rotary press according to the present invention is configured such that a paper feeder for feeding continuous paper by a feed roll and an exchange cylinder device are detachable. In an exchange cylinder type rotary press having a printing unit having a printing unit and a drawing device that is located downstream of the printing unit and draws in continuous paper by a drawing roll, the exchange cylinder device has a printing surface on the entire circumference. An exchange cylinder device for continuous printing using a printing cylinder, and for intermittent printing using a printing cylinder having a printing surface on the peripheral surface of this large diameter part with a part in the circumferential direction having a larger diameter than the other parts. A forward / reverse rotation mechanism in which the continuous paper can be run and stopped in the forward and reverse directions on the downstream side of the feed roll of the paper feeder and on the upstream side of the draw-in roll of the draw-in device by selectively using the exchange drum device. Provide running means,
A fixed dancer roll is provided between the delivery roll and the forward / reverse running means on the upstream side, and between the forward / reverse running means on the downstream side and the pull-out roll.

In the rotary drum rotary press having the above-described structure, the position of the printing unit can be adjusted in the running direction of the continuous paper, and a sectional motor is used as a driving source for the rolls of each part.

[0009]

[Operation] In the case of continuous printing, the exchange unit for continuous printing is mounted on the printing unit, and the dancer rolls on the upstream side and the downstream side are fixed. By moving the continuous paper at a predetermined speed, the pattern set on the exchange cylinder of the exchange cylinder device of the printing unit is repeatedly and continuously printed. The top and bottom length of each pattern at this time is selected by the exchange cylinder.

When performing intermittent printing, an exchange cylinder device for intermittent printing is mounted on the printing unit, and the fixing of the dancer rolls on the upstream side and the downstream side is released. The continuous paper, which is traveled at a constant travel distance by the feed roll and the pull-in roll, passes between the printing cylinder and the impression cylinder, so that a pattern is printed on the large diameter portion of the printing cylinder. Each time the printing cylinder makes one rotation, while the continuous paper faces the small diameter section of the printing cylinder, the length from the circumference (L) of the large diameter section of the printing cylinder to the top and bottom length of the pattern (a)
The continuous paper is run backward (including stoppage) in the running direction of the continuous paper by the forward / reverse running means by the circumferential length obtained by subtracting.

When the continuous paper is run backward by the forward / reverse running means, the continuous paper is slackened on the upstream side of the forward / reverse running means of the sheet feeding device, and is proliferated on the downstream side of the forward / reverse running means of the drawing device. However, the slack and expansion of the continuous paper on the upstream and downstream sides are absorbed by dancer rolls provided on the upstream and downstream sides.

The printing register is adjusted by moving the printing unit. The rolls of each part are individually driven by a sectional motor for each part.

[0013]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows the entirety of a rotary press according to the present invention, in which 1 is a paper feed unit, and 2 is a plurality of printing units 2.
A printing unit including a, 2b, and 2c is a processing unit.

The paper supply unit 1 includes a paper support table 5 for supporting the continuous paper 4 in a roll form, and a paper supply device 6 for supplying the continuous paper 4 supported by the paper support table 5 to the printing unit 2. I have. Reference numeral 7 denotes a humidity control device for controlling the humidity of the continuous paper 4 unwound from the roll shape, and includes a number of rolls.

The paper feeder 6 includes a delivery roll 8, a dancer roll 9, two forward / reverse rolls 10a and 10b,
Guide rolls 11, which are continuous paper 4
Are arranged in order in the traveling direction. The feed roll 8 is configured to rotate in a direction in which the continuous paper 4 is fed at a constant speed by the sectional motor 12a which can be independently controlled.

The two forward / reverse rolls 10a and 10b are vertically displaced from each other, and are connected by a gear train so that they rotate at the same speed in opposite directions.
The forward / reverse rotation motor 13a, which can be independently controlled, is connected to one of the forward / reverse rotation rolls 10a.

The dancer roll 9 is disposed between the delivery roll 8 and the forward / reverse roll 10a on the upstream side. The dancer roll 9 is supported at the tip of a swing arm 14 swingably supported by a frame. The swing arm 14 is moved downward by a biasing device 15 such as a bellofram cylinder (trade name), the biasing force of which can be adjusted.
To the dancer roll 9).
Can swing up and down against the biasing force of the biasing device 15.

At the base of the swing arm 14 supporting the dancer roll 9, a lock plate 17 having an arc hole 16 centered on the fulcrum of the swing arm 14 is integrally provided. For example, it is inserted into a circular hole 16 and can be fixed to the frame side by a bolt that can be tightened by a handle. The roll 9 is locked at that position.

The printing section 2 is located at the entrance (upstream section) of the processing section 3.
There is provided a pull-in device 20 for pulling in the continuous paper 4 from. The retracting device 20 includes two forward / reverse rotating rolls 21.
a, 21b, a dancer roll 22, a drawing roll 23, and a guide roll 24, which are arranged in the running direction of the continuous paper 4 in order.

The two forward / reverse rolls 21a and 21b are vertically displaced from each other and are connected by a gear train so that they rotate at the same speed in opposite directions.
The forward / reverse rotation motor 13b, which can be independently controlled, is connected to one forward / reverse rotation roll 21a.

The dancer roll 22 is disposed between the forward / reverse roll 21b and the pull-in roll 23 on the downstream side. The dancer roll 22 has the same configuration as the dancer roll 9 of the sheet feeding device 6 described above, and the urging device 15 tensions the continuous paper 4 between the forward-reverse rotation roll 21 b on the downstream side and the pull-in roll 23. In this direction, and can swing up and down against the urging force, and can be further locked.

The pull-in roll 23 rotates in a direction of pulling the continuous paper 4 toward the processing section 3 at a constant speed by the section motor 12b which can be independently controlled.

Each printing unit 2a, 2b, 2 of the printing unit 2
c is an exchange cylinder type, in which exchange cylinder devices 25a, 25b, 25c for continuous printing and exchange cylinder devices 26a, 26b, 26c for intermittent printing, which will be described later, are detachably mounted. Has become.

Each exchange cylinder device 25a, 25 for continuous printing
b and 25c are the plate cylinder 27, blanket cylinder 28, impression cylinder 29
And the respective plate cylinders 27 are detachably connected via gears to the individually controllable section motors 30a, 30b, 30c provided in the printing units 2a, 2b, 2c. It has become. The rotation speed of each of the motors 30a, 30b, 30c is individually controlled.

The exchange cylinder devices 26a, 26b for intermittent printing,
26c is as shown in FIG. 2 and comprises a plate cylinder 31, a blanket cylinder 32 and an impression cylinder 33. The blanket cylinder 32 is circumferentially divided into a large-diameter portion that comes into contact with the plate cylinder 31 and the impression cylinder 33, and a small-diameter portion having a predetermined gap between the peripheral surfaces of the plate cylinder 31 and the impression cylinder 33. A blanket is attached around the diameter. The length of the large diameter portion in the circumferential direction is slightly longer than the maximum vertical length of the target printed matter.
In this embodiment, it is set to 1/2 of the entire circumference. The plate cylinder 31 corresponding to the blanket cylinder 32 has a diameter which is a fraction of the diameter of the large-diameter portion of the blanket cylinder 32, and is halved in this embodiment.

Each of the exchange cylinder devices 26a, 26b,
With the printing cylinder 26c mounted on each of the printing units 2a, 2b, 2c, the plate cylinder 31 of each of the exchange cylinder devices 26a, 26b, 26c is driven by the sectional motor 30a, 30b, 30 of each unit.
c is removably connected via a gear.

Each of the above printing units 2a, 2b, 2c
Is movably mounted on a rail 35 of a base 34 via a linear guide 36 in a running direction of the continuous paper 4 over a predetermined stroke. FIG. 3 shows the printing units 2a,
The frame 37 of each unit is screwed to a screw shaft 38 provided on the base 34 in the moving direction. When the screw shaft 38 is rotated by the handle 40 via the bevel gear mechanism 39, the frame 37 moves. A lock member 41 is provided at a position corresponding to each of the printing units 2a, 2b, and 2c on the base 34 so as to move downward by rotating the eccentric cam shaft 42.
The upper end of the printing unit 2 is opposed to one side of the frame 37 of each unit, and by moving the lock member 41 downward, the frame 37 is pressed and fixed to the base 34 so that the printing units 2a, 2b, 2c are formed. Are fixed to the base 34.

The operation of the above configuration will be described below. (1) Continuous printing Replacement cylinder devices 25a, 25b, 25c for continuous printing are attached to each of the printing units 2a, 2b, 2c of the printing unit 2, and both the upstream and downstream dancer rolls 9, 22 are fixed. . In this state, the continuous paper 4 is passed through the rotary press to perform continuous printing as a normal unidirectional rotary printing press.

That is, in this case, the delivery roll 8, the forward / reverse rotation rolls 10a, 10b of the sheet feeding device 6, and the forward / reverse rotation rolls 21a, 21b and the pull-in roll 23 of the pull-in device 20 are synchronously and continuously rotated in the same direction to continuously rotate. The paper 4 runs at a constant speed. At this time, the peripheral speeds of the cylinders of the exchange cylinder devices 25a, 25b, 25c for continuous printing of the printing units 2a, 2b, 2c are set to the running speeds of the continuous paper 4 by the motors 30a, 30b, 30c.
Is controlled by. At this time, each printing unit 2a, 2
The positions of b and 2c in the running direction of the continuous paper 4 are set and fixed according to the top and bottom lengths of the printed picture.

(2) Intermittent Printing Interchangeable cylinder units 26a, 26b, 26c for intermittent printing are attached to the printing units 2a, 2b, 2c of the printing unit 2, and both the upstream and downstream dancer rolls 9, 22 are provided. Release the lock. In this state, the continuous paper 4 is passed through the rotary press to perform intermittent printing.

The details of the intermittent printing will be described below. For ease of explanation, the vertical length a of the picture to be printed is the same as (a) the circumference L of the large diameter portion of the blanket cylinder 32 (a = L), and (b) the blanket When it is 1/2 of the circumference L of the large diameter portion of the trunk (a = L / 2)
Will be described.

(A) The vertical length of the picture is the blanket cylinder 2
When the circumference is the same as that of the large diameter part

The travel amount of the continuous paper 4 per rotation of the blanket cylinder 32 by the feed roll 8 and the pull-in roll 23 is set to a (= L). Further, the forward / reverse rotation rolls 10 on the sheet feeding device 6 side and the processing unit 3 side (upstream / downstream side), respectively.
a, 10b and 21a, 21b are synchronized with the peripheral speed of the blanket cylinder 32 of each of the intermittent printing exchange cylinders 26a, 26b, 26c, and the forward rotation amount is set to a to perform forward rotation and stop. Repeat.

In the state shown in FIG. 2, the blanket cylinder 32 on which the pattern of the top and bottom lengths a (= L) has been transferred on the printing plate of the plate cylinder 31 makes a half turn, and forward and reverse rotations on the upstream and downstream sides. By rotating the rolls 10a, 10b and 21a, 21b forward by the traveling amount L, a pattern whose top and bottom lengths are the circumference L (= a) of the large diameter portion of the blanket cylinder 32 is printed on the continuous paper 4.
Thereafter, the continuous paper 4 is opposed to the small diameter portion thereof while the blanket cylinder 32 rotates by 回 転, and then the large diameter portion is again opposed to the continuous paper 4 so that the same pattern is printed.

At this time, if the continuous paper 4 runs continuously, a blank portion having a length corresponding to the circumference of the small-diameter portion is formed between the patterns.
b and the rotation of the continuous paper 4 are controlled by controlling the rotation of 21a and 21b. That is, the forward / reverse roll 10 on the upstream / downstream side
The rotation of a, 10b and 21a, 21b is stopped over the running time of the circumference of the small diameter portion of the blanket cylinder 32. Next, the forward / reverse rolls 10a, 10b and 21a, 21b are again rotated forward by the travel distance a with the large diameter end of the blanket cylinder 32 facing the continuous paper 4.

As described above, in synchronization with the rotation of the blanket cylinder 32, the forward / reverse rolls 10a, 10b and 2
By repeating the normal rotation and the stop of 1a and 21b, a pattern having a length L of the large diameter portion of the blanket cylinder 32 is printed on the continuous paper 4 without any extra blank portion between the patterns. Is done.

At this time, while the continuous paper 4 is running at a constant speed by the feed roll 8 and the pull-in roll 23, as described above, the continuous paper 4 in the printing unit runs intermittently. The difference in the running amount of the continuous paper 4 at this time is absorbed by the dancer rolls 9 and 22 on the upstream and downstream sides.

(B) When the vertical length a of the picture is 1/2 of the circumference L of the large diameter portion of the blanket cylinder 32

The travel amount of the continuous paper 4 per rotation of the blanket cylinder 32 by the feeding roll 8 and the drawing roll 23 is set to a (= L / 2). Further, the forward and reverse rotations 10a, 10b and 21a, 21b on the upstream and downstream sides are synchronized with the peripheral speed of the blanket cylinder 32, and the traveling amount is rotated by L in the forward rotation direction, and then reversely rotated by La. Then, the normal rotation and the reverse rotation are repeatedly performed.

In the state shown in FIG. 2, a picture is transferred to the large diameter portion of the blanket cylinder 32 from the upstream end thereof to the circumference a (= L / 2). In this state, the blanket cylinder 32 has a length (L) equal to the circumference (L) of the large diameter portion thereof.
/ 2 rotation and the forward / reverse rotation roll 10
By rotating the a, 10b and 21a, 21b forward by the traveling amount L, a pattern of the top and bottom length a and a blank portion of La are printed on the continuous paper 4.

Next, while the blanket cylinder 32 makes a half turn, that is, while the small diameter portion of the blanket cylinder 32 faces the continuous paper 4, the forward / reverse rotation rolls 10a, 10b
, And 21a, 21b are reversed by the amount of La, and are again rotated by the amount of L. As a result, a pattern having a top and bottom length a whose top and bottom length is shorter than the entire circumference of the blanket cylinder 32 is repeatedly printed on the continuous paper 4 without forming an extra blank portion.

At this time, the traveling amount of the continuous paper 4 by the feed roll 8 and the pull-in roll 23 and the forward / reverse roll 10
The difference in travel distance between the intermittent feeds a and b and the intermittent feeds a and b is absorbed by the dancer rolls 9 and 22 on the upstream and downstream sides.

The exchange cylinder device 26 for intermittent printing is used.
Some of the a, 26b, and 26c are configured so that the impression cylinder 33 can be moved (skipped) away from a position where the impression cylinder 33 comes into contact with the peripheral surface of the large diameter portion of the blanket cylinder 32.

In this configuration, as in the case of (b) above, the top and bottom length a of the printed pattern is 印刷 of the circumference L of the large diameter portion.
In the case where the vertical length a of the pattern is shorter than the circumference L of the large-diameter portion as in the case of, the printing of the pattern is completed, and the peripheral surface of the remaining large-diameter portion faces the impression cylinder. During this time, the impression cylinder is skipped and separated from the bracket cylinder. As a result, the time during which the blanket cylinder and the impression cylinder do not come into contact per rotation becomes longer only during the skipping of the impression cylinder, and it is possible to allow time for running the continuous paper in the reverse direction.

In the above operation, each printing unit 2a,
2b and 2c move in the running direction of the continuous paper 4 to perform printing position alignment.

Each exchange cylinder device in the above-described embodiment is a three-cylinder type of plate cylinder, blanket cylinder, and impression cylinder (offset printing).
However, direct printing by a plate cylinder, that is, a two-cylinder type may be used. In this case, the printing cylinder is directly transferred to the impression cylinder, and the blanket cylinder and the printing cylinder that are in contact with the impression cylinder can be generically referred to as a printing cylinder.

[0047]

According to the present invention, the exchange cylinder device for continuous printing and the exchange cylinder device for intermittent printing can be selectively mounted on the printing unit. Small-type large-lot printing and this continuous printing cannot be performed due to the speed ratio, for example, 200 m
Any kind of multi-product small lot printing, such as a pattern with a vertical length of millimeter size such as m or 300 mm, can be performed at low cost. Further, since the two lots can be selectively performed by one rotary press, the facility cost for printing the two lots can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view schematically showing an entire rotary press in which an exchange cylinder device for continuous printing is mounted.

FIG. 2 is a schematic configuration diagram illustrating an exchange cylinder device for intermittent printing.

FIG. 3 is a perspective view schematically showing a moving unit and a fixing unit of the printing unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Paper supply part, 2 ... Printing part, 2a, 2b, 2c ... Printing unit, 3 ... Processing part, 4 ... Continuous paper, 5 ... Paper support stand, 6 ... Paper supply device, 7 ... Humidity control device, 8 ... Delivery roll, 9,22
... Dancer roll, 10a, 10b, 21a, 21b ...
Forward and reverse rolls, 11, 24 ... guide rolls, 12a, 1
2b, 30a, 30b, 30c ... sectional roll,
13a, 13b: forward / reverse rotation motor, 14: swing arm, 1
5: biasing device, 16: arc hole, 17: lock plate,
20 ... retraction device, 23 ... retraction roll, 25a,
25b, 25c, 26a, 26b, 26c: exchange cylinder device, 27, 31: plate cylinder, 28, 32: blanket, 2
9, 33 ... impression cylinder, 34 ... base, 35 ... rail, 36 ... linear guide, 37 frame, 38 ... screw shaft, 39 ... bevel gear mechanism, 40 ... handle, 41 ... lock member, 42 ... eccentric cam shaft.

Claims (3)

[Claims] A feed unit for feeding continuous paper by a feed roll; a printing unit having a printing unit in which an exchange cylinder device is detachable; and a continuous paper fed by a draw-in roll positioned downstream of the printing unit. An exchange cylinder type rotary press having a pull-in device for drawing in, an exchange cylinder device for continuous printing using a printing cylinder having a printing surface on the entire circumference as the exchange cylinder device, and a part in the circumferential direction as another exchange cylinder device. A replacement cylinder device for intermittent printing using a printing cylinder having a printing surface on a peripheral surface of the large diameter portion with a diameter larger than that of the portion, a downstream side of a feed roll of a paper feeding device; On the upstream side of the pull-in roll, there is provided a forward / reverse running means for running and stopping the continuous paper in the normal rotation direction and the reverse rotation direction, between the delivery roll and the upstream forward / reverse running means, and on the downstream side. Forward and reverse running means and drawer roll During, exchange cylinder type rotary press, characterized in that a dancer roll to be fixed. 2. The rotary cylinder type rotary press according to claim 1, wherein the position of the printing unit is adjustable in the running direction of the continuous paper. 3. The rotary cylinder type rotary press according to claim 1, wherein a sectional motor is used as an individual drive source for the rolls of each part.