JP4610579B2 - Automatic switching device for offset rotary press - Google Patents

Description

  The present invention relates to an automatic switching apparatus for an offset rotary press. More specifically, each device automatically operates in order when the operator presses one switch.

Conventionally, in an offset rotary press, when switching from the previous job to the next job, the operator has operated each device in order to operate it, which has a problem that it takes time and burdens the operator.
That is, after the previous job is finished, the printing unit is stopped, the blanket is washed on the rubber cylinder, the printing plate is replaced, and the new web roll is replaced from the old web roll. In order to prepare for the next job, various printing presets (for example, setting of the ink fountain key opening, ink fountain roller rotation amount, dampening water supply amount, folding machine setting to values according to the new pattern image) Etc.) in order.

In the above-described prior art, when switching from the previous job to the next job, the operator operates each device in order to operate it, so that it takes time and burdens the operator.
An object of the present invention is to solve the above-described problem by causing each device to automatically operate in order only by an operator pressing one switch.

The automatic device for switching work of the offset rotary press of the present invention that achieves such an object is a continuous supply of a belt-like body that affixes a belt-like body of a new web roll to a belt-like body of an old web roll and continuously supplies the belt-like body. Means, plate changing means for exchanging the plate supported on the plate cylinder, folding means switching means for switching the folding machine according to the folding specifications of the next printing, and reference ink film thickness Between the ink supply means that can reduce the ink amount to the distribution and can superimpose the ink film thickness distribution corresponding to the next printing on the reference ink film thickness distribution, the printing unit including the plate cylinder, and the folder A final unit dancer device that is disposed on the roll unit so that the belt-like body fed from the printing unit to the folding machine is wound around a roll and does not loosen, and a blanket cleaning means for a rubber cylinder provided in the printing unit And a switch for automating the switching operation of the offset rotary press, wherein the switch is operated in a predetermined order in response to a signal from the one switch. In response to the signal from the switch, first, the ink supply means reduces the ink amount to the reference ink film thickness distribution, and then the blanket cleaning means performs blanket cleaning on the rubber cylinder while simultaneously The belt-like body of the new web roll is pasted on the belt-like body of the old web roll by the body continuous supply means, and the belt-like body is continuously supplied, and then the printing plate replacing means by the plate changing means. In parallel with the replacement, the folding specification switching means switches the state of the folding machine according to the folding specification of the next printing, and In order to change the printing plate by the plate changing means, the plate changing means is operated and before the printing plate is removed, the plate cylinder is rotated forward to transfer the printing unit from the printing unit to the folding machine. It includes the operation of the final unit dancer device while feeding the belt-like body so as not to loosen the belt-like body fed from the printing unit to the folding machine, and thereafter the reference ink film thickness by the ink supply means. An ink film thickness distribution corresponding to the next printing is superimposed on the distribution.

  According to a second aspect of the present invention, there is provided an automatic switching device for an offset rotary press according to a second aspect of the present invention, wherein the printing unit and the continuous strip feeding means are provided. When the printing plate exchanging means operates, the plate cylinder is reversed and the belt-like body fed back from the printing unit to the paper feeding device is wound around a roll. It is characterized by arranging an infeed dancer device that prevents loosening.

According to a third aspect of the present invention, there is provided an apparatus for automating the switching operation of an offset rotary press according to a third aspect of the present invention. At the same time as blanket cleaning, the data for superimposing the ink film thickness distribution corresponding to the next printing on the reference ink film thickness distribution from the database by the ink supply means was preset as the final printing data. And

  In the automatic switching device of the offset rotary press of the present invention, when switching from the previous job to the next job, by pressing one switch, the switching from the previous job to the next job can be automatically performed. Since each device is operated continuously, the total work time can be shortened and the burden on the operator can be reduced.

  The modes described below as examples are the best modes for carrying out the present invention.

An offset rotary press according to an embodiment of the present invention is shown in FIG.
The offset rotary press shown in FIG. 1 operates each device continuously so that the switch from the previous job to the next job can be automatically performed by pressing one switch. , A plurality of printing units 200, a dryer 300, a cooling device 400, a web pass device 500, a drag device 600, a folding machine 700, and the like.

As shown in FIG. 2, the paper feeder 100 has two web rolls 101 and 102 wound in a roll shape attached to both ends of a turret arm 104, and the turret arm 104 is pivotally attached to a central shaft 103. When the web (printing paper) 10 is unwound from one web roll 101 and approaches the end, the web from the next web roll 102 is continuously connected and sent to the next printing unit 200.
As shown in FIG. 3, each printing unit 200 has rubber cylinders 201 and 202 and plate cylinders 203 and 204 arranged vertically symmetrically with respect to the web 10 that runs horizontally, and blanket cleaning is performed on each rubber cylinder 201 and 202. While the apparatuses 205 and 206 are provided, the plate cylinders 203 and 204 are provided with automatic plate changers (APCs) 207 and 208, respectively.

The upper automatic plate changer 207 is provided with a guide frame 211 so as to be pivotable about a support shaft 209 and can be moved from a standby position to a plate change position by an actuator 213 as indicated by a broken line in the figure. The frame 211 is provided with a holder 215 for holding an old version or a new version.
Accordingly, after the guide frame 211 is moved to the plate replacement position, the old plate is disengaged from the plate cylinder 203 and the plate cylinder 203 is rotated in the reverse direction, thereby guiding the old plate along the guide frame 211 and an actuator (not shown). The old version can be raised by expanding and contracting.
Thereafter, the new plate is supplied to the plate cylinder 203 along the guide frame 211, and the plate cylinder 203 is rotated forward to mount the new plate on the plate cylinder 203.

Similarly, the lower automatic plate changer 208 is provided with a guide frame 212 so as to be pivotable about the support shaft 210 and can be moved from the standby position to the plate change position by the actuator 214 as indicated by a broken line in the figure. The guide frame 212 is provided with a holder 216 for holding an old version or a new version.
Therefore, after the guide frame 212 is moved to the plate replacement position, the old plate can be lowered along the guide frame 211 by releasing the engagement of the old plate from the plate cylinder 204 and rotating the plate cylinder 204 in the reverse direction.
Thereafter, the new plate is supplied to the plate cylinder 204 along the guide frame 212, and the plate cylinder 204 is rotated forward to mount the new plate on the plate cylinder 204.
Further, an ink supply device 800 as shown in FIG. 4 is provided for the printing plates on the plate cylinders 203 and 204.

The ink supply device 800 supplies the ink 802 in the ink fountain 801 to the ink fountain roller 803 by adjusting the opening of the ink fountain keys 804-1 to 804-n, and the ink transferred to the ink fountain roller 803 is transferred to the ink transfer roller 805. Is supplied to the printing plate 807 through the ink roller group 806 by the calling operation. In parallel with this ink supply, dampening water 808 is supplied to the printing plate 807 via a water supply roller group 809.
In the ink supply device 800, when the printing plate 807 is replaced from the old plate to the new plate, the opening degree of the ink fountain keys 804-1 to 804-n, the rotation amount of the ink fountain roller 803, and the dampening are set to values according to the pattern of the new plate. Main printing data such as the supply amount of water 808 is preset as will be described later.
The blanket cleaning devices 205 and 206 are devices for removing foreign matters such as ink scum by bringing a brush or cloth into contact with the rubber cylinders 201 and 202.

The dryer 300 is a device that heats and dries the web 10 printed after passing through the printing unit 200.
The cooling device 400 is a device that cools the web 10 after passing through the dryer 300.
The web pass device 500 is a device that changes the direction of the web 10 in order to control the position and tension of the web 10.
The folding machine 700 is a device that cuts and folds the web 10 after drying and cooling.
For example, the former is folded in half in the width direction with the former, cut into a predetermined length with the cutting cylinder, or the folded signature is folded in parallel in the width direction or the length direction with the folding cylinder. In other words, it is a device that folds folded signatures in half in the orthogonal direction with a chopper, and has various structures according to combinations of cutting and folding.

An infeed dancer device 150 is disposed between the paper feeding device 100 and the printing unit 200, and a final unit dancer device 250 is disposed between the printing unit 200 and the dryer 300.
The dancer apparatuses 150 and 250 are apparatuses that take up the slack of the web when the printing unit 200 rotates forward and backward by winding the web between three rolls and moving the center roll up and down.
Although not shown, these devices 200 to 700 are connected by a drive shaft and are driven by a main motor provided in the printing unit 200, and the printing unit 200 and the final unit dancer 250 are connected to each other. It can be disconnected by ON / OFF of a driving clutch provided between them.

In the offset rotary press having the above-described configuration, when changing jobs, ink film thickness adjustment, web roll change, plate change, folding specification change, and the like operate as follows according to the flowcharts shown in FIGS. An automated device is provided. Moreover, the time chart of the speed of the web at that time is shown in FIG.
By turning on the decelerating cleaning switch, as shown in FIG. 5, the following steps are automatically processed continuously and in parallel.
That is, when the previous job is completed, in order to switch the job, the operator first turns on the deceleration cleaning switch at time t1 shown in FIG. 7, thereby starting the deceleration of the web (step S1).

Next, at time t2 in FIG. 7 where the rotational speed of the plate cylinders 203 and 204 becomes S1, the operation of calling the ink transfer roller 805 is stopped, and the supply of ink to the ink roller group 6 is shut off (step S2). .
By continuing printing while decelerating in this state, ink removal is performed, ink on the ink roller group 806 is consumed, and the ink film thickness is gradually reduced.

At the point t3 when the amount of rotation of the plate cylinders 203 and 204 reaches S2, the ink form roller is removed (step S3) and at the same time, the rubber cylinders 201 and 202, which are printing cylinders, and the plate cylinders 203 and 204 are turned off. (Step S4), the ink removal started from the point t2 is finished at the point t3.
In this ink removing, as shown in FIG. 8, the ink film thickness distribution Mb corresponding to the pattern of the old plate formed in the ink roller group 806 is removed at the point t2, and becomes thinner from the upstream to the downstream at the point t3. The minimum ink film thickness distribution Ma ′ required during printing is left.
In FIG. 8, Ma is the minimum ink film thickness required during printing, and Mb is superimposed on the ink film thickness Ma.

Thereafter, at time t4 in FIG. 7, the water supply roller in the water supply roller group 809 is removed (step S5).
Therefore, the ink film thickness distribution on the ink roller group 806 is flattened by the rotation from the point t3, and becomes the minimum ink film thickness Ma required during printing as shown in FIG.
Thus, as a result of the ink film thickness distribution on the ink roller group 806 being the minimum Ma, the printing pattern in the next job is preset as described later without being affected by the printing pattern in the previous job. Then, the ink film thickness distribution corresponding to the printing pattern in the next job is quickly reached.

When the web speed is reduced to 200 rpm, the rubber cylinders 201 and 202 are cleaned by the blanket cleaning devices 205 and 206 at time t5 in FIG. 7 (step S6).
Thereafter, when the blanket cleaning is completed (step S7), the web starts rotating slowly at a time t6 in FIG. 7 at a speed of about 8 rpm (step S8).
On the other hand, simultaneously with the start of the blanket cleaning, the turret arm 104 in the paper feeder 100 is swung (step T1), and then the new web roll 102 is waited at a predetermined paper splicing position (step T2). After starting the dynamic rotation, paper splicing (pasting) from the old web roll 101 to the new web roll 102 is performed (step T3).
As described above, since the time for performing blanket cleaning in the printing unit 200 is utilized to perform the paper splicing operation in the paper feeding device 100, the overall processing time can be shortened.

Subsequently, after the paper splicing is completed, the web starts rotating at a low speed of about 200 rpm at time t7 in FIG. 7 (step S9).
Since the low-speed rotation is faster than the slow rotation, the paper seam can be quickly fed and discharged from the folding machine 700.
The printing data preset is started in parallel between the end of blanket cleaning (step S7) and the low speed rotation (step S9) (step U1).

That is, the main printing data such as the opening degree of the ink fountain keys 804-1 to 804-n, the rotation amount of the ink fountain roller 803, the supply amount of the dampening water 808, and the like are obtained from a computer database (not shown). Read (step U2), the read main printing data is transmitted to the ink supply device 800 (step U3), and the main printing data such as the opening degree is preset in the control device of the ink supply device 800 (step U4).
Since the main printing data preset is performed for each of the upper and lower ink supply devices 800 and for each color, in the case of double-sided multicolor printing, it is necessary to perform the total printing data preset eight times.
As described above, since the software processing called the main printing data preset is performed in parallel while executing the hardware processing for the various apparatuses 100 to 700, the overall processing work is shortened.

Note that the actual printing data preset starts after the blanket cleaning (step S7), and is completed until the machine stop (step S10), if it is completed before the automatic plate change described below is completed. It doesn't matter.
Subsequently, as shown in FIG. 9, automatic plate replacement and folding specification switching are performed in parallel.
That is, the rotary press is operated (step V1), and when the folding cylinder of the folding machine 700 reaches a specific position, the driving clutch is turned off (step V2).
The reason why the driving clutch is turned off is that a malfunction occurs in the folding machine 700 due to reverse rotation.

That is, when the web is fed in the reverse direction for automatic plate change in the printing unit 200 as described below, in the folding machine 700 that performs cutting and folding, the signature is dropped from the cylinder and the folding cylinder. .
Next, the final unit dancer 250 is turned on (step V3), and the web fed from the printing unit 200 to the dryer 300 is wound around the up and down rolls so as not to be loosened.
Thereafter, when the plate cylinders 203 and 204 come to a specific position where the plates can be exchanged, the machine (only the printing unit 200) is stopped (step V4).
Then, the plate cylinders 203 and 204 are rotated in the reverse direction, and the old plates are extracted from the plate cylinders 203 and 204 by the automatic plate changers 207 and 208 (step V5).

By reverse rotation of the plate cylinders 203 and 204, the roll of the final unit dancer 250 returns to the original position (step V6), and at the same time, the infeed dancer device 150 is turned on (step V7). Ensure that the web that is fed back to 100 does not sag.
Subsequently, when the extraction of the old version is completed, the machine (only the printing unit 200) is stopped (step V8).
Then, the machine (only the printing unit 200) is rotated forward, and new plates are supplied from the automatic plate changers 207 and 208 to the plate cylinders 203 and 204 and set (step V9).
Further, the final unit dancer 250 is turned on (step V10), the web fed from the printing unit 200 to the dryer 300 is prevented from being loosened, and the roll of the infeed dancer device 150 is returned to the original position (step). V11).

When the setting of the new version on the plate cylinders 203 and 204 is completed, the machine (only the printing unit 200) is stopped (step V12).
On the other hand, after the driving clutch is turned off, the folding machine brake is turned on (step V13), and the folding specifications are switched in parallel.
Here, the folding specification switching consists of folding cylinder / cylinder phase change (step V14) and cam / guide switching (step V15).
Folding cylinder / cylinder phase change means changing the phase of the gripping plate of the gripping cylinder with respect to the needle and knife of the folding cylinder corresponding to parallel 1 diffraction or parallel 2 diffraction. As shown in 63-282053, there is an example of changing by a gear transmission mechanism.
Cam / guide switching is cam switching for switching the phase of the cam mechanism for switching the operation timing of the gripping claws, knives and needles provided on the cutting cylinder, folding cylinder and rod cylinder, and parallel parallel diffraction. It is a general term for guide switching of a guide mechanism for switching between two diffraction and delta folding.

  As shown in FIG. 10, the cam switching includes a cam holder 3 rotatably supported and having protrusions 3 a and 3 b on the outer peripheral surface, and an annular cam 4 attached to the cam holder 3 and having a predetermined outer peripheral surface. A cam follower 15 that relocates on the outer peripheral surface of the cam 4, a link plate 8, a lever 10, an air cylinder 13 and the like that are connected to the protruding portion 3b of the cam holder 3 to rotate the cam holder 3, A first stopper 6 that restricts the rotation of the cam 4 to one side as the cylinder 13 extends, a second stopper 14 that restricts the rotation of the cam 4 to the other side as the air cylinder 13 contracts, And a third stopper 5 for biasing the protruding portion 3a of the cam holder 3 whose rotation to the other side is restricted by the two stoppers 14 in the direction of rotation restricted by the second stopper 14. There are things to be Te (Japanese Patent Application No. 10-301983).

As the guide switching, as shown in FIG. 11, in the parallel folding device of the folding machine in which the first holding cylinder 23 and the second holding cylinder 24 are arranged with their peripheral surfaces in contact with each other, the first holding cylinder 23 and When the belt 21 is hung between the rollers 20a to 20d parallel to this and the predetermined roller 20d is moved so that the belt 21 is folded once in parallel, the belt 21 is changed from the first holding cylinder 23 to the second holding cylinder 24. When the front end of the signature is switched from the first holding cylinder 23 to the guiding position for guiding it to the second holding cylinder 24, conversely, when parallel folding or delta folding, the first holding cylinder 23 and the second holding cylinder 24 are folded in parallel. There is also a switch to a retreat position for retreating from the second holding cylinder 24 (Japanese Patent Application No. 10-266166).
When the plate change and folding specification switching are completed, the driving clutch is turned on (step V16), and the dancer apparatuses 150 and 250 are returned (step V17).

Further, in order to prepare for the next job, the steps shown in FIG. 6 are continuously executed.
That is, at time t9 shown in FIG. 7, the machine speed is set to a slow rotation of about 8 rpm, the standby operation of the dryer 300 is started (step X1), and the folding preset is started (step Y1).
Folding preset refers to adjusting the position of each control axis in the folding machine 700 corresponding to the next job. Positioning of the former, chopper, etc. according to the paper folding, paper width, quality and thickness. Including doing things.
Subsequently, when both the temperature rise completion signal and the folder preset completion signal of the dryer 700 are input (step X2), the web feed speed is increased at time t10 in FIG. 7 (step X3).

Thereafter, when the speed is increased to a certain number of revolutions, the water supply roller 809 is attached and dampening water 808 is supplied (step X4), and the printing cylinders 201 and 202 and the plate cylinders 203 and 204 are attached (step X5). ), The calling operation of the ink transfer roller 805 is started (step X6), and pre-inking is started.
In this pre-inking, the opening degree of the ink fountain keys 804-1 to 804-n and the amount of rotation of the ink fountain roller 803 according to the new printing pattern according to the main printing data preset in the ink supply device 800 corresponding to a new job. The supply amount of the dampening water 808 is adjusted, and the minimum ink film thickness Ma required during printing remaining in the ink roller group 806 (FIG. 8 (a)), depending on the pattern of the new version The ink film thickness distribution Mb is superimposed (FIG. 8B).
When pre-inking is completed, the ink roller group 806 is attached (step X7), and the speed increase is completed when a predetermined printing speed is reached.

  As described above, in this embodiment, when switching from the previous job to the next job, the devices 100 to 800 automatically operate in order only by pressing one switch by the operator, so that the total work time As well as the burden on the operator.

That is, by operating one decelerating cleaning switch, ink removal, blanket cleaning, web / roll replacement / paper splicing, main printing data preset, automatic plate changer, folding specification automatic switching, dryer 300 standby operation Folding presets can be performed.
Moreover, blanket cleaning, web / roll replacement / paper splicing, and main printing data preset can be executed in parallel, and automatic plate changer and folding specification automatic switching can be executed in parallel. Since the standby operation of the dryer 300 and the folding preset can be performed in parallel, the total work time is shortened.

  INDUSTRIAL APPLICABILITY The present invention can be widely used industrially as an automatic device for switching an offset rotary press in which each device automatically operates in order only by pressing one switch by an operator.

1 is an overall external view of an offset rotary press according to an embodiment of the present invention. FIG. 6 is an explanatory diagram of a sheet feeding device. It is sectional drawing of a printing unit. It is explanatory drawing of an ink supply apparatus. It is a flowchart which shows the some process performed by the deceleration washing | cleaning switch ON. It is a flowchart which shows the some process performed by the deceleration washing | cleaning switch ON. It is a time chart which shows the feed speed of a web. It is explanatory drawing of an ink film thickness. It is a flowchart which shows the some process performed by the deceleration washing | cleaning switch ON. It is explanatory drawing of cam switching. It is explanatory drawing of guide switching.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Paper feeder 150 Infeed dancer apparatus 200 Printing unit 207,208 Automatic plate change apparatus 250 Final unit dancer apparatus 300 Dryer 400 Cooling apparatus 500 Web pass apparatus 600 Drag apparatus 700 Folding machine 800 Ink supply apparatus

Claims (3)

A strip continuous supply means for pasting the strip of the new web roll to the strip of the old web roll and continuously feeding the strip,
Plate changing means for changing the plate supported on the plate cylinder;
Folding machine specification switching means for switching the folding machine according to the next printing folding specification,
An ink supply means capable of reducing the ink amount to the reference ink film thickness distribution and superimposing the ink film thickness distribution corresponding to the next printing on the reference ink film thickness distribution;
A final unit dancer device disposed between a printing unit including the plate cylinder and the folding machine, and wound around a roll of the strip fed from the printing unit to the folding machine so as not to be loosened;
Blanket cleaning means for the rubber cylinder provided in the printing unit;
With one switch to switch from previous printing to next printing,
In an automatic switching apparatus for an offset rotary press that operates the respective units in a predetermined order according to a signal from the one switch,
Depending on the signal from the switch,
First, the ink amount is reduced to the reference ink film thickness distribution by the ink supply means,
Next, the blanket cleaning is performed on the rubber cylinder by the blanket cleaning means, and at the same time, the strip of the new web roll is pasted on the strip of the old web roll by the continuous strip supply means, Continuously supplying the strip,
Subsequently, in parallel with the replacement of the printing plate by the printing plate replacement means, the folding specification switching means switches the state of the folding machine according to the folding specification of the next printing, and the printing plate The replacement of the printing plate by the replacement means is performed when the printing plate replacement means is operated and before the printing plate is removed, the plate cylinder is rotated forward to transfer the belt from the printing unit to the folding machine. Including operating the final unit dancer device while feeding the body so as not to loosen the strips sent from the printing unit to the folding machine;
Thereafter, the ink supply means superimposes the ink film thickness distribution corresponding to the next printing on the reference ink film thickness distribution, and the automatic switching device for the offset rotary press. Between the printing unit and the sheet feeding device as the belt-like continuous supply means, the plate cylinder is reversely rotated when the printing plate replacing means is operated, and is fed back from the printing unit to the sheet feeding device. 2. An apparatus for automating the switching operation of an offset rotary press according to claim 1, wherein an infeed dancer device is provided to prevent the belt-like body from being loosened by being wound around a roll. At the same time that the blanket cleaning is performed on the rubber cylinder by the blanket cleaning unit, the data for superimposing the ink film thickness distribution corresponding to the next printing on the reference ink film thickness distribution is read from the database by the ink supply unit. The apparatus for automating the switching operation of an offset rotary press according to claim 1, wherein the apparatus is preset as final printing data.

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